165 files changed, 12243 insertions, 4655 deletions

diff --git a/tools/hv/hv_get_dhcp_info.sh b/tools/hv/hv_get_dhcp_info.sh
new file mode 100755
index 000000000000..ccd3e9532764
--- /dev/null
+++ b/tools/hv/hv_get_dhcp_info.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+# This example script retrieves the DHCP state of a given interface.
+# In the interest of keeping the KVP daemon code free of distro specific
+# information; the kvp daemon code invokes this external script to gather
+# DHCP setting for the specific interface.
+#
+# Input: Name of the interface
+#
+# Output: The script prints the string "Enabled" to stdout to indicate
+#       that DHCP is enabled on the interface. If DHCP is not enabled,
+#       the script prints the string "Disabled" to stdout.
+#
+# Each Distro is expected to implement this script in a distro specific
+# fashion. For instance on Distros that ship with Network Manager enabled,
+# this script can be based on the Network Manager APIs for retrieving DHCP
+# information.
+
+if_file="/etc/sysconfig/network-scripts/ifcfg-"$1
+
+dhcp=$(grep "dhcp" $if_file 2>/dev/null)
+
+if [ "$dhcp" != "" ];
+then
+echo "Enabled"
+else
+echo "Disabled"
+fi
diff --git a/tools/hv/hv_get_dns_info.sh b/tools/hv/hv_get_dns_info.sh
new file mode 100755
index 000000000000..058c17b46ffc
--- /dev/null
+++ b/tools/hv/hv_get_dns_info.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# This example script parses /etc/resolv.conf to retrive DNS information.
+# In the interest of keeping the KVP daemon code free of distro specific
+# information; the kvp daemon code invokes this external script to gather
+# DNS information.
+# This script is expected to print the nameserver values to stdout.
+# Each Distro is expected to implement this script in a distro specific
+# fashion. For instance on Distros that ship with Network Manager enabled,
+# this script can be based on the Network Manager APIs for retrieving DNS
+# entries.
+
+cat /etc/resolv.conf 2>/dev/null | awk '/^nameserver/ { print $2 }'
diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index d9834b362943..5959affd8820 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -31,6 +31,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <string.h>
+#include <ctype.h>
 #include <errno.h>
 #include <arpa/inet.h>
 #include <linux/connector.h>
@@ -41,6 +42,7 @@
 #include <syslog.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#include <dirent.h>
 
 /*
  * KVP protocol: The user mode component first registers with the
@@ -68,25 +70,39 @@ enum key_index {
         ProcessorArchitecture
 };
 
+
+enum {
+        IPADDR = 0,
+        NETMASK,
+        GATEWAY,
+        DNS
+};
+
 static char kvp_send_buffer[4096];
-static char kvp_recv_buffer[4096];
+static char kvp_recv_buffer[4096 * 2];
 static struct sockaddr_nl addr;
+static int in_hand_shake = 1;
 
 static char *os_name = "";
 static char *os_major = "";
 static char *os_minor = "";
 static char *processor_arch;
 static char *os_build;
-static char *lic_version;
+static char *lic_version = "Unknown version";
 static struct utsname uts_buf;
 
+/*
+ * The location of the interface configuration file.
+ */
+
+#define KVP_CONFIG_LOC  "/var/opt/"
 
 #define MAX_FILE_NAME 100
 #define ENTRIES_PER_BLOCK 50
 
 struct kvp_record {
-        __u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
-        __u8 value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
+        char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
+        char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
 };
 
 struct kvp_file_state {
@@ -94,7 +110,7 @@ struct kvp_file_state {
         int num_blocks;
         struct kvp_record *records;
         int num_records;
-        __u8 fname[MAX_FILE_NAME];
+        char fname[MAX_FILE_NAME];
 };
 
 static struct kvp_file_state kvp_file_info[KVP_POOL_COUNT];
@@ -106,7 +122,7 @@ static void kvp_acquire_lock(int pool)
 
         if (fcntl(kvp_file_info[pool].fd, F_SETLKW, &fl) == -1) {
                 syslog(LOG_ERR, "Failed to acquire the lock pool: %d", pool);
-                exit(-1);
+                exit(EXIT_FAILURE);
         }
 }
 
@@ -118,7 +134,7 @@ static void kvp_release_lock(int pool)
         if (fcntl(kvp_file_info[pool].fd, F_SETLK, &fl) == -1) {
                 perror("fcntl");
                 syslog(LOG_ERR, "Failed to release the lock pool: %d", pool);
-                exit(-1);
+                exit(EXIT_FAILURE);
         }
 }
 
@@ -137,14 +153,19 @@ static void kvp_update_file(int pool)
         if (!filep) {
                 kvp_release_lock(pool);
                 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
-                exit(-1);
+                exit(EXIT_FAILURE);
         }
 
         bytes_written = fwrite(kvp_file_info[pool].records,
                                 sizeof(struct kvp_record),
                                 kvp_file_info[pool].num_records, filep);
 
-        fflush(filep);
+        if (ferror(filep) || fclose(filep)) {
+                kvp_release_lock(pool);
+                syslog(LOG_ERR, "Failed to write file, pool: %d", pool);
+                exit(EXIT_FAILURE);
+        }
+
         kvp_release_lock(pool);
 }
 
@@ -163,14 +184,19 @@ static void kvp_update_mem_state(int pool)
         if (!filep) {
                 kvp_release_lock(pool);
                 syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
-                exit(-1);
+                exit(EXIT_FAILURE);
         }
-        while (!feof(filep)) {
+        for (;;) {
                 readp = &record[records_read];
                 records_read += fread(readp, sizeof(struct kvp_record),
                                         ENTRIES_PER_BLOCK * num_blocks,
                                         filep);
 
+                if (ferror(filep)) {
+                        syslog(LOG_ERR, "Failed to read file, pool: %d", pool);
+                        exit(EXIT_FAILURE);
+                }
+
                 if (!feof(filep)) {
                         /*
                          * We have more data to read.
@@ -180,7 +206,7 @@ static void kvp_update_mem_state(int pool)
 
                         if (record == NULL) {
                                 syslog(LOG_ERR, "malloc failed");
-                                exit(-1);
+                                exit(EXIT_FAILURE);
                         }
                         continue;
                 }
@@ -191,14 +217,15 @@ static void kvp_update_mem_state(int pool)
         kvp_file_info[pool].records = record;
         kvp_file_info[pool].num_records = records_read;
 
+        fclose(filep);
         kvp_release_lock(pool);
 }
 static int kvp_file_init(void)
 {
-        int ret, fd;
+        int  fd;
         FILE *filep;
         size_t records_read;
-        __u8 *fname;
+        char *fname;
         struct kvp_record *record;
         struct kvp_record *readp;
         int num_blocks;
@@ -208,7 +235,7 @@ static int kvp_file_init(void)
         if (access("/var/opt/hyperv", F_OK)) {
                 if (mkdir("/var/opt/hyperv", S_IRUSR | S_IWUSR | S_IROTH)) {
                         syslog(LOG_ERR, " Failed to create /var/opt/hyperv");
-                        exit(-1);
+                        exit(EXIT_FAILURE);
                 }
         }
 
@@ -232,12 +259,18 @@ static int kvp_file_init(void)
                         fclose(filep);
                         return 1;
                 }
-                while (!feof(filep)) {
+                for (;;) {
                         readp = &record[records_read];
                         records_read += fread(readp, sizeof(struct kvp_record),
                                         ENTRIES_PER_BLOCK,
                                         filep);
 
+                        if (ferror(filep)) {
+                                syslog(LOG_ERR, "Failed to read file, pool: %d",
+                                       i);
+                                exit(EXIT_FAILURE);
+                        }
+
                         if (!feof(filep)) {
                                 /*
                                  * We have more data to read.
@@ -311,7 +344,6 @@ static int kvp_key_add_or_modify(int pool, __u8 *key, int key_size, __u8 *value,
                         int value_size)
 {
         int i;
-        int j, k;
         int num_records;
         struct kvp_record *record;
         int num_blocks;
@@ -394,7 +426,7 @@ static int kvp_get_value(int pool, __u8 *key, int key_size, __u8 *value,
         return 1;
 }
 
-static void kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
+static int kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
                                 __u8 *value, int value_size)
 {
         struct kvp_record *record;
@@ -406,16 +438,12 @@ static void kvp_pool_enumerate(int pool, int index, __u8 *key, int key_size,
         record = kvp_file_info[pool].records;
 
         if (index >= kvp_file_info[pool].num_records) {
-                /*
-                 * This is an invalid index; terminate enumeration;
-                 * - a NULL value will do the trick.
-                 */
-                strcpy(value, "");
-                return;
+                return 1;
         }
 
         memcpy(key, record[index].key, key_size);
         memcpy(value, record[index].value, value_size);
+        return 0;
 }
 
 
@@ -426,6 +454,7 @@ void kvp_get_os_info(void)
 
         uname(&uts_buf);
         os_build = uts_buf.release;
+        os_name = uts_buf.sysname;
         processor_arch = uts_buf.machine;
 
         /*
@@ -437,20 +466,70 @@ void kvp_get_os_info(void)
         if (p)
                 *p = '\0';
 
+        /*
+         * Parse the /etc/os-release file if present:
+         * http://www.freedesktop.org/software/systemd/man/os-release.html
+         */
+        file = fopen("/etc/os-release", "r");
+        if (file != NULL) {
+                while (fgets(buf, sizeof(buf), file)) {
+                        char *value, *q;
+
+                        /* Ignore comments */
+                        if (buf[0] == '#')
+                                continue;
+
+                        /* Split into name=value */
+                        p = strchr(buf, '=');
+                        if (!p)
+                                continue;
+                        *p++ = 0;
+
+                        /* Remove quotes and newline; un-escape */
+                        value = p;
+                        q = p;
+                        while (*p) {
+                                if (*p == '\\') {
+                                        ++p;
+                                        if (!*p)
+                                                break;
+                                        *q++ = *p++;
+                                } else if (*p == '\'' || *p == '"' ||
+                                           *p == '\n') {
+                                        ++p;
+                                } else {
+                                        *q++ = *p++;
+                                }
+                        }
+                        *q = 0;
+
+                        if (!strcmp(buf, "NAME")) {
+                                p = strdup(value);
+                                if (!p)
+                                        break;
+                                os_name = p;
+                        } else if (!strcmp(buf, "VERSION_ID")) {
+                                p = strdup(value);
+                                if (!p)
+                                        break;
+                                os_major = p;
+                        }
+                }
+                fclose(file);
+                return;
+        }
+
+        /* Fallback for older RH/SUSE releases */
         file = fopen("/etc/SuSE-release", "r");
         if (file != NULL)
                 goto kvp_osinfo_found;
         file  = fopen("/etc/redhat-release", "r");
         if (file != NULL)
                 goto kvp_osinfo_found;
-        /*
-         * Add code for other supported platforms.
-         */
 
         /*
          * We don't have information about the os.
          */
-        os_name = uts_buf.sysname;
         return;
 
 kvp_osinfo_found:
@@ -494,82 +573,458 @@ done:
         return;
 }
 
+
+
+/*
+ * Retrieve an interface name corresponding to the specified guid.
+ * If there is a match, the function returns a pointer
+ * to the interface name and if not, a NULL is returned.
+ * If a match is found, the caller is responsible for
+ * freeing the memory.
+ */
+
+static char *kvp_get_if_name(char *guid)
+{
+        DIR *dir;
+        struct dirent *entry;
+        FILE    *file;
+        char    *p, *q, *x;
+        char    *if_name = NULL;
+        char    buf[256];
+        char *kvp_net_dir = "/sys/class/net/";
+        char dev_id[256];
+
+        dir = opendir(kvp_net_dir);
+        if (dir == NULL)
+                return NULL;
+
+        snprintf(dev_id, sizeof(dev_id), "%s", kvp_net_dir);
+        q = dev_id + strlen(kvp_net_dir);
+
+        while ((entry = readdir(dir)) != NULL) {
+                /*
+                 * Set the state for the next pass.
+                 */
+                *q = '\0';
+                strcat(dev_id, entry->d_name);
+                strcat(dev_id, "/device/device_id");
+
+                file = fopen(dev_id, "r");
+                if (file == NULL)
+                        continue;
+
+                p = fgets(buf, sizeof(buf), file);
+                if (p) {
+                        x = strchr(p, '\n');
+                        if (x)
+                                *x = '\0';
+
+                        if (!strcmp(p, guid)) {
+                                /*
+                                 * Found the guid match; return the interface
+                                 * name. The caller will free the memory.
+                                 */
+                                if_name = strdup(entry->d_name);
+                                fclose(file);
+                                break;
+                        }
+                }
+                fclose(file);
+        }
+
+        closedir(dir);
+        return if_name;
+}
+
+/*
+ * Retrieve the MAC address given the interface name.
+ */
+
+static char *kvp_if_name_to_mac(char *if_name)
+{
+        FILE    *file;
+        char    *p, *x;
+        char    buf[256];
+        char addr_file[256];
+        int i;
+        char *mac_addr = NULL;
+
+        snprintf(addr_file, sizeof(addr_file), "%s%s%s", "/sys/class/net/",
+                if_name, "/address");
+
+        file = fopen(addr_file, "r");
+        if (file == NULL)
+                return NULL;
+
+        p = fgets(buf, sizeof(buf), file);
+        if (p) {
+                x = strchr(p, '\n');
+                if (x)
+                        *x = '\0';
+                for (i = 0; i < strlen(p); i++)
+                        p[i] = toupper(p[i]);
+                mac_addr = strdup(p);
+        }
+
+        fclose(file);
+        return mac_addr;
+}
+
+
+/*
+ * Retrieve the interface name given tha MAC address.
+ */
+
+static char *kvp_mac_to_if_name(char *mac)
+{
+        DIR *dir;
+        struct dirent *entry;
+        FILE    *file;
+        char    *p, *q, *x;
+        char    *if_name = NULL;
+        char    buf[256];
+        char *kvp_net_dir = "/sys/class/net/";
+        char dev_id[256];
+        int i;
+
+        dir = opendir(kvp_net_dir);
+        if (dir == NULL)
+                return NULL;
+
+        snprintf(dev_id, sizeof(dev_id), kvp_net_dir);
+        q = dev_id + strlen(kvp_net_dir);
+
+        while ((entry = readdir(dir)) != NULL) {
+                /*
+                 * Set the state for the next pass.
+                 */
+                *q = '\0';
+
+                strcat(dev_id, entry->d_name);
+                strcat(dev_id, "/address");
+
+                file = fopen(dev_id, "r");
+                if (file == NULL)
+                        continue;
+
+                p = fgets(buf, sizeof(buf), file);
+                if (p) {
+                        x = strchr(p, '\n');
+                        if (x)
+                                *x = '\0';
+
+                        for (i = 0; i < strlen(p); i++)
+                                p[i] = toupper(p[i]);
+
+                        if (!strcmp(p, mac)) {
+                                /*
+                                 * Found the MAC match; return the interface
+                                 * name. The caller will free the memory.
+                                 */
+                                if_name = strdup(entry->d_name);
+                                fclose(file);
+                                break;
+                        }
+                }
+                fclose(file);
+        }
+
+        closedir(dir);
+        return if_name;
+}
+
+
+static void kvp_process_ipconfig_file(char *cmd,
+                                        char *config_buf, int len,
+                                        int element_size, int offset)
+{
+        char buf[256];
+        char *p;
+        char *x;
+        FILE *file;
+
+        /*
+         * First execute the command.
+         */
+        file = popen(cmd, "r");
+        if (file == NULL)
+                return;
+
+        if (offset == 0)
+                memset(config_buf, 0, len);
+        while ((p = fgets(buf, sizeof(buf), file)) != NULL) {
+                if ((len - strlen(config_buf)) < (element_size + 1))
+                        break;
+
+                x = strchr(p, '\n');
+                *x = '\0';
+                strcat(config_buf, p);
+                strcat(config_buf, ";");
+        }
+        pclose(file);
+}
+
+static void kvp_get_ipconfig_info(char *if_name,
+                                 struct hv_kvp_ipaddr_value *buffer)
+{
+        char cmd[512];
+        char dhcp_info[128];
+        char *p;
+        FILE *file;
+
+        /*
+         * Get the address of default gateway (ipv4).
+         */
+        sprintf(cmd, "%s %s", "ip route show dev", if_name);
+        strcat(cmd, " | awk '/default/ {print $3 }'");
+
+        /*
+         * Execute the command to gather gateway info.
+         */
+        kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
+                                (MAX_GATEWAY_SIZE * 2), INET_ADDRSTRLEN, 0);
+
+        /*
+         * Get the address of default gateway (ipv6).
+         */
+        sprintf(cmd, "%s %s", "ip -f inet6  route show dev", if_name);
+        strcat(cmd, " | awk '/default/ {print $3 }'");
+
+        /*
+         * Execute the command to gather gateway info (ipv6).
+         */
+        kvp_process_ipconfig_file(cmd, (char *)buffer->gate_way,
+                                (MAX_GATEWAY_SIZE * 2), INET6_ADDRSTRLEN, 1);
+
+
+        /*
+         * Gather the DNS  state.
+         * Since there is no standard way to get this information
+         * across various distributions of interest; we just invoke
+         * an external script that needs to be ported across distros
+         * of interest.
+         *
+         * Following is the expected format of the information from the script:
+         *
+         * ipaddr1 (nameserver1)
+         * ipaddr2 (nameserver2)
+         * .
+         * .
+         */
+
+        sprintf(cmd, "%s",  "hv_get_dns_info");
+
+        /*
+         * Execute the command to gather DNS info.
+         */
+        kvp_process_ipconfig_file(cmd, (char *)buffer->dns_addr,
+                                (MAX_IP_ADDR_SIZE * 2), INET_ADDRSTRLEN, 0);
+
+        /*
+         * Gather the DHCP state.
+         * We will gather this state by invoking an external script.
+         * The parameter to the script is the interface name.
+         * Here is the expected output:
+         *
+         * Enabled: DHCP enabled.
+         */
+
+        sprintf(cmd, "%s %s", "hv_get_dhcp_info", if_name);
+
+        file = popen(cmd, "r");
+        if (file == NULL)
+                return;
+
+        p = fgets(dhcp_info, sizeof(dhcp_info), file);
+        if (p == NULL) {
+                pclose(file);
+                return;
+        }
+
+        if (!strncmp(p, "Enabled", 7))
+                buffer->dhcp_enabled = 1;
+        else
+                buffer->dhcp_enabled = 0;
+
+        pclose(file);
+}
+
+
+static unsigned int hweight32(unsigned int *w)
+{
+        unsigned int res = *w - ((*w >> 1) & 0x55555555);
+        res = (res & 0x33333333) + ((res >> 2) & 0x33333333);
+        res = (res + (res >> 4)) & 0x0F0F0F0F;
+        res = res + (res >> 8);
+        return (res + (res >> 16)) & 0x000000FF;
+}
+
+static int kvp_process_ip_address(void *addrp,
+                                int family, char *buffer,
+                                int length,  int *offset)
+{
+        struct sockaddr_in *addr;
+        struct sockaddr_in6 *addr6;
+        int addr_length;
+        char tmp[50];
+        const char *str;
+
+        if (family == AF_INET) {
+                addr = (struct sockaddr_in *)addrp;
+                str = inet_ntop(family, &addr->sin_addr, tmp, 50);
+                addr_length = INET_ADDRSTRLEN;
+        } else {
+                addr6 = (struct sockaddr_in6 *)addrp;
+                str = inet_ntop(family, &addr6->sin6_addr.s6_addr, tmp, 50);
+                addr_length = INET6_ADDRSTRLEN;
+        }
+
+        if ((length - *offset) < addr_length + 1)
+                return HV_E_FAIL;
+        if (str == NULL) {
+                strcpy(buffer, "inet_ntop failed\n");
+                return HV_E_FAIL;
+        }
+        if (*offset == 0)
+                strcpy(buffer, tmp);
+        else
+                strcat(buffer, tmp);
+        strcat(buffer, ";");
+
+        *offset += strlen(str) + 1;
+        return 0;
+}
+
 static int
-kvp_get_ip_address(int family, char *buffer, int length)
+kvp_get_ip_info(int family, char *if_name, int op,
+                 void  *out_buffer, int length)
 {
         struct ifaddrs *ifap;
         struct ifaddrs *curp;
-        int ipv4_len = strlen("255.255.255.255") + 1;
-        int ipv6_len = strlen("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")+1;
         int offset = 0;
-        const char *str;
-        char tmp[50];
+        int sn_offset = 0;
         int error = 0;
-
+        char *buffer;
+        struct hv_kvp_ipaddr_value *ip_buffer;
+        char cidr_mask[5]; /* /xyz */
+        int weight;
+        int i;
+        unsigned int *w;
+        char *sn_str;
+        struct sockaddr_in6 *addr6;
+
+        if (op == KVP_OP_ENUMERATE) {
+                buffer = out_buffer;
+        } else {
+                ip_buffer = out_buffer;
+                buffer = (char *)ip_buffer->ip_addr;
+                ip_buffer->addr_family = 0;
+        }
         /*
          * On entry into this function, the buffer is capable of holding the
-         * maximum key value (2048 bytes).
+         * maximum key value.
          */
 
         if (getifaddrs(&ifap)) {
                 strcpy(buffer, "getifaddrs failed\n");
-                return 1;
+                return HV_E_FAIL;
         }
 
         curp = ifap;
         while (curp != NULL) {
-                if ((curp->ifa_addr != NULL) &&
-                   (curp->ifa_addr->sa_family == family)) {
-                        if (family == AF_INET) {
-                                struct sockaddr_in *addr =
-                                (struct sockaddr_in *) curp->ifa_addr;
-
-                                str = inet_ntop(family, &addr->sin_addr,
-                                                tmp, 50);
-                                if (str == NULL) {
-                                        strcpy(buffer, "inet_ntop failed\n");
-                                        error = 1;
-                                        goto getaddr_done;
-                                }
-                                if (offset == 0)
-                                        strcpy(buffer, tmp);
-                                else
-                                        strcat(buffer, tmp);
-                                strcat(buffer, ";");
+                if (curp->ifa_addr == NULL) {
+                        curp = curp->ifa_next;
+                        continue;
+                }
 
-                                offset += strlen(str) + 1;
-                                if ((length - offset) < (ipv4_len + 1))
-                                        goto getaddr_done;
+                if ((if_name != NULL) &&
+                        (strncmp(curp->ifa_name, if_name, strlen(if_name)))) {
+                        /*
+                         * We want info about a specific interface;
+                         * just continue.
+                         */
+                        curp = curp->ifa_next;
+                        continue;
+                }
 
-                        } else {
+                /*
+                 * We only support two address families: AF_INET and AF_INET6.
+                 * If a family value of 0 is specified, we collect both
+                 * supported address families; if not we gather info on
+                 * the specified address family.
+                 */
+                if ((family != 0) && (curp->ifa_addr->sa_family != family)) {
+                        curp = curp->ifa_next;
+                        continue;
+                }
+                if ((curp->ifa_addr->sa_family != AF_INET) &&
+                        (curp->ifa_addr->sa_family != AF_INET6)) {
+                        curp = curp->ifa_next;
+                        continue;
+                }
 
+                if (op == KVP_OP_GET_IP_INFO) {
                         /*
-                         * We only support AF_INET and AF_INET6
-                         * and the list of addresses is separated by a ";".
+                         * Gather info other than the IP address.
+                         * IP address info will be gathered later.
                          */
-                                struct sockaddr_in6 *addr =
-                                (struct sockaddr_in6 *) curp->ifa_addr;
-
-                                str = inet_ntop(family,
-                                        &addr->sin6_addr.s6_addr,
-                                        tmp, 50);
-                                if (str == NULL) {
-                                        strcpy(buffer, "inet_ntop failed\n");
-                                        error = 1;
-                                        goto getaddr_done;
-                                }
-                                if (offset == 0)
-                                        strcpy(buffer, tmp);
-                                else
-                                        strcat(buffer, tmp);
-                                strcat(buffer, ";");
-                                offset += strlen(str) + 1;
-                                if ((length - offset) < (ipv6_len + 1))
-                                        goto getaddr_done;
+                        if (curp->ifa_addr->sa_family == AF_INET) {
+                                ip_buffer->addr_family |= ADDR_FAMILY_IPV4;
+                                /*
+                                 * Get subnet info.
+                                 */
+                                error = kvp_process_ip_address(
+                                                             curp->ifa_netmask,
+                                                             AF_INET,
+                                                             (char *)
+                                                             ip_buffer->sub_net,
+                                                             length,
+                                                             &sn_offset);
+                                if (error)
+                                        goto gather_ipaddr;
+                        } else {
+                                ip_buffer->addr_family |= ADDR_FAMILY_IPV6;
 
+                                /*
+                                 * Get subnet info in CIDR format.
+                                 */
+                                weight = 0;
+                                sn_str = (char *)ip_buffer->sub_net;
+                                addr6 = (struct sockaddr_in6 *)
+                                        curp->ifa_netmask;
+                                w = addr6->sin6_addr.s6_addr32;
+
+                                for (i = 0; i < 4; i++)
+                                        weight += hweight32(&w[i]);
+
+                                sprintf(cidr_mask, "/%d", weight);
+                                if ((length - sn_offset) <
+                                        (strlen(cidr_mask) + 1))
+                                        goto gather_ipaddr;
+
+                                if (sn_offset == 0)
+                                        strcpy(sn_str, cidr_mask);
+                                else
+                                        strcat(sn_str, cidr_mask);
+                                strcat((char *)ip_buffer->sub_net, ";");
+                                sn_offset += strlen(sn_str) + 1;
                         }
 
+                        /*
+                         * Collect other ip related configuration info.
+                         */
+
+                        kvp_get_ipconfig_info(if_name, ip_buffer);
                 }
+
+gather_ipaddr:
+                error = kvp_process_ip_address(curp->ifa_addr,
+                                                curp->ifa_addr->sa_family,
+                                                buffer,
+                                                length, &offset);
+                if (error)
+                        goto getaddr_done;
+
                 curp = curp->ifa_next;
         }
 
@@ -579,6 +1034,315 @@ getaddr_done:
 }
 
 
+static int expand_ipv6(char *addr, int type)
+{
+        int ret;
+        struct in6_addr v6_addr;
+
+        ret = inet_pton(AF_INET6, addr, &v6_addr);
+
+        if (ret != 1) {
+                if (type == NETMASK)
+                        return 1;
+                return 0;
+        }
+
+        sprintf(addr, "%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:"
+                "%02x%02x:%02x%02x:%02x%02x",
+                (int)v6_addr.s6_addr[0], (int)v6_addr.s6_addr[1],
+                (int)v6_addr.s6_addr[2], (int)v6_addr.s6_addr[3],
+                (int)v6_addr.s6_addr[4], (int)v6_addr.s6_addr[5],
+                (int)v6_addr.s6_addr[6], (int)v6_addr.s6_addr[7],
+                (int)v6_addr.s6_addr[8], (int)v6_addr.s6_addr[9],
+                (int)v6_addr.s6_addr[10], (int)v6_addr.s6_addr[11],
+                (int)v6_addr.s6_addr[12], (int)v6_addr.s6_addr[13],
+                (int)v6_addr.s6_addr[14], (int)v6_addr.s6_addr[15]);
+
+        return 1;
+
+}
+
+static int is_ipv4(char *addr)
+{
+        int ret;
+        struct in_addr ipv4_addr;
+
+        ret = inet_pton(AF_INET, addr, &ipv4_addr);
+
+        if (ret == 1)
+                return 1;
+        return 0;
+}
+
+static int parse_ip_val_buffer(char *in_buf, int *offset,
+                                char *out_buf, int out_len)
+{
+        char *x;
+        char *start;
+
+        /*
+         * in_buf has sequence of characters that are seperated by
+         * the character ';'. The last sequence does not have the
+         * terminating ";" character.
+         */
+        start = in_buf + *offset;
+
+        x = strchr(start, ';');
+        if (x)
+                *x = 0;
+        else
+                x = start + strlen(start);
+
+        if (strlen(start) != 0) {
+                int i = 0;
+                /*
+                 * Get rid of leading spaces.
+                 */
+                while (start[i] == ' ')
+                        i++;
+
+                if ((x - start) <= out_len) {
+                        strcpy(out_buf, (start + i));
+                        *offset += (x - start) + 1;
+                        return 1;
+                }
+        }
+        return 0;
+}
+
+static int kvp_write_file(FILE *f, char *s1, char *s2, char *s3)
+{
+        int ret;
+
+        ret = fprintf(f, "%s%s%s%s\n", s1, s2, "=", s3);
+
+        if (ret < 0)
+                return HV_E_FAIL;
+
+        return 0;
+}
+
+
+static int process_ip_string(FILE *f, char *ip_string, int type)
+{
+        int error = 0;
+        char addr[INET6_ADDRSTRLEN];
+        int i = 0;
+        int j = 0;
+        char str[256];
+        char sub_str[10];
+        int offset = 0;
+
+        memset(addr, 0, sizeof(addr));
+
+        while (parse_ip_val_buffer(ip_string, &offset, addr,
+                                        (MAX_IP_ADDR_SIZE * 2))) {
+
+                sub_str[0] = 0;
+                if (is_ipv4(addr)) {
+                        switch (type) {
+                        case IPADDR:
+                                snprintf(str, sizeof(str), "%s", "IPADDR");
+                                break;
+                        case NETMASK:
+                                snprintf(str, sizeof(str), "%s", "NETMASK");
+                                break;
+                        case GATEWAY:
+                                snprintf(str, sizeof(str), "%s", "GATEWAY");
+                                break;
+                        case DNS:
+                                snprintf(str, sizeof(str), "%s", "DNS");
+                                break;
+                        }
+                        if (i != 0) {
+                                if (type != DNS) {
+                                        snprintf(sub_str, sizeof(sub_str),
+                                                "_%d", i++);
+                                } else {
+                                        snprintf(sub_str, sizeof(sub_str),
+                                                "%d", ++i);
+                                }
+                        } else if (type == DNS) {
+                                snprintf(sub_str, sizeof(sub_str), "%d", ++i);
+                        }
+
+
+                } else if (expand_ipv6(addr, type)) {
+                        switch (type) {
+                        case IPADDR:
+                                snprintf(str, sizeof(str), "%s", "IPV6ADDR");
+                                break;
+                        case NETMASK:
+                                snprintf(str, sizeof(str), "%s", "IPV6NETMASK");
+                                break;
+                        case GATEWAY:
+                                snprintf(str, sizeof(str), "%s",
+                                        "IPV6_DEFAULTGW");
+                                break;
+                        case DNS:
+                                snprintf(str, sizeof(str), "%s",  "DNS");
+                                break;
+                        }
+                        if ((j != 0) || (type == DNS)) {
+                                if (type != DNS) {
+                                        snprintf(sub_str, sizeof(sub_str),
+                                                "_%d", j++);
+                                } else {
+                                        snprintf(sub_str, sizeof(sub_str),
+                                                "%d", ++i);
+                                }
+                        } else if (type == DNS) {
+                                snprintf(sub_str, sizeof(sub_str),
+                                        "%d", ++i);
+                        }
+                } else {
+                        return  HV_INVALIDARG;
+                }
+
+                error = kvp_write_file(f, str, sub_str, addr);
+                if (error)
+                        return error;
+                memset(addr, 0, sizeof(addr));
+        }
+
+        return 0;
+}
+
+static int kvp_set_ip_info(char *if_name, struct hv_kvp_ipaddr_value *new_val)
+{
+        int error = 0;
+        char if_file[128];
+        FILE *file;
+        char cmd[512];
+        char *mac_addr;
+
+        /*
+         * Set the configuration for the specified interface with
+         * the information provided. Since there is no standard
+         * way to configure an interface, we will have an external
+         * script that does the job of configuring the interface and
+         * flushing the configuration.
+         *
+         * The parameters passed to this external script are:
+         * 1. A configuration file that has the specified configuration.
+         *
+         * We will embed the name of the interface in the configuration
+         * file: ifcfg-ethx (where ethx is the interface name).
+         *
+         * The information provided here may be more than what is needed
+         * in a given distro to configure the interface and so are free
+         * ignore information that may not be relevant.
+         *
+         * Here is the format of the ip configuration file:
+         *
+         * HWADDR=macaddr
+         * IF_NAME=interface name
+         * DHCP=yes (This is optional; if yes, DHCP is configured)
+         *
+         * IPADDR=ipaddr1
+         * IPADDR_1=ipaddr2
+         * IPADDR_x=ipaddry (where y = x + 1)
+         *
+         * NETMASK=netmask1
+         * NETMASK_x=netmasky (where y = x + 1)
+         *
+         * GATEWAY=ipaddr1
+         * GATEWAY_x=ipaddry (where y = x + 1)
+         *
+         * DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
+         *
+         * IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
+         * tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
+         * IPV6NETMASK.
+         *
+         * The host can specify multiple ipv4 and ipv6 addresses to be
+         * configured for the interface. Furthermore, the configuration
+         * needs to be persistent. A subsequent GET call on the interface
+         * is expected to return the configuration that is set via the SET
+         * call.
+         */
+
+        snprintf(if_file, sizeof(if_file), "%s%s%s", KVP_CONFIG_LOC,
+                "hyperv/ifcfg-", if_name);
+
+        file = fopen(if_file, "w");
+
+        if (file == NULL) {
+                syslog(LOG_ERR, "Failed to open config file");
+                return HV_E_FAIL;
+        }
+
+        /*
+         * First write out the MAC address.
+         */
+
+        mac_addr = kvp_if_name_to_mac(if_name);
+        if (mac_addr == NULL) {
+                error = HV_E_FAIL;
+                goto setval_error;
+        }
+
+        error = kvp_write_file(file, "HWADDR", "", mac_addr);
+        if (error)
+                goto setval_error;
+
+        error = kvp_write_file(file, "IF_NAME", "", if_name);
+        if (error)
+                goto setval_error;
+
+        if (new_val->dhcp_enabled) {
+                error = kvp_write_file(file, "DHCP", "", "yes");
+                if (error)
+                        goto setval_error;
+
+                /*
+                 * We are done!.
+                 */
+                goto setval_done;
+        }
+
+        /*
+         * Write the configuration for ipaddress, netmask, gateway and
+         * name servers.
+         */
+
+        error = process_ip_string(file, (char *)new_val->ip_addr, IPADDR);
+        if (error)
+                goto setval_error;
+
+        error = process_ip_string(file, (char *)new_val->sub_net, NETMASK);
+        if (error)
+                goto setval_error;
+
+        error = process_ip_string(file, (char *)new_val->gate_way, GATEWAY);
+        if (error)
+                goto setval_error;
+
+        error = process_ip_string(file, (char *)new_val->dns_addr, DNS);
+        if (error)
+                goto setval_error;
+
+setval_done:
+        free(mac_addr);
+        fclose(file);
+
+        /*
+         * Now that we have populated the configuration file,
+         * invoke the external script to do its magic.
+         */
+
+        snprintf(cmd, sizeof(cmd), "%s %s", "hv_set_ifconfig", if_file);
+        system(cmd);
+        return 0;
+
+setval_error:
+        syslog(LOG_ERR, "Failed to write config file");
+        free(mac_addr);
+        fclose(file);
+        return error;
+}
+
+
 static int
 kvp_get_domain_name(char *buffer, int length)
 {
@@ -646,6 +1410,10 @@ int main(void)
         char    *p;
         char    *key_value;
         char    *key_name;
+        int     op;
+        int     pool;
+        char    *if_name;
+        struct hv_kvp_ipaddr_value *kvp_ip_val;
 
         daemon(1, 0);
         openlog("KVP", 0, LOG_USER);
@@ -657,13 +1425,13 @@ int main(void)
 
         if (kvp_file_init()) {
                 syslog(LOG_ERR, "Failed to initialize the pools");
-                exit(-1);
+                exit(EXIT_FAILURE);
         }
 
         fd = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_CONNECTOR);
         if (fd < 0) {
                 syslog(LOG_ERR, "netlink socket creation failed; error:%d", fd);
-                exit(-1);
+                exit(EXIT_FAILURE);
         }
         addr.nl_family = AF_NETLINK;
         addr.nl_pad = 0;
@@ -675,7 +1443,7 @@ int main(void)
         if (error < 0) {
                 syslog(LOG_ERR, "bind failed; error:%d", error);
                 close(fd);
-                exit(-1);
+                exit(EXIT_FAILURE);
         }
         sock_opt = addr.nl_groups;
         setsockopt(fd, 270, 1, &sock_opt, sizeof(sock_opt));
@@ -687,7 +1455,7 @@ int main(void)
         message->id.val = CN_KVP_VAL;
 
         hv_msg = (struct hv_kvp_msg *)message->data;
-        hv_msg->kvp_hdr.operation = KVP_OP_REGISTER;
+        hv_msg->kvp_hdr.operation = KVP_OP_REGISTER1;
         message->ack = 0;
         message->len = sizeof(struct hv_kvp_msg);
 
@@ -695,7 +1463,7 @@ int main(void)
         if (len < 0) {
                 syslog(LOG_ERR, "netlink_send failed; error:%d", len);
                 close(fd);
-                exit(-1);
+                exit(EXIT_FAILURE);
         }
 
         pfd.fd = fd;
@@ -721,12 +1489,21 @@ int main(void)
                 incoming_cn_msg = (struct cn_msg *)NLMSG_DATA(incoming_msg);
                 hv_msg = (struct hv_kvp_msg *)incoming_cn_msg->data;
 
-                switch (hv_msg->kvp_hdr.operation) {
-                case KVP_OP_REGISTER:
+                /*
+                 * We will use the KVP header information to pass back
+                 * the error from this daemon. So, first copy the state
+                 * and set the error code to success.
+                 */
+                op = hv_msg->kvp_hdr.operation;
+                pool = hv_msg->kvp_hdr.pool;
+                hv_msg->error = HV_S_OK;
+
+                if ((in_hand_shake) && (op == KVP_OP_REGISTER1)) {
                         /*
                          * Driver is registering with us; stash away the version
                          * information.
                          */
+                        in_hand_shake = 0;
                         p = (char *)hv_msg->body.kvp_register.version;
                         lic_version = malloc(strlen(p) + 1);
                         if (lic_version) {
@@ -737,44 +1514,82 @@ int main(void)
                                 syslog(LOG_ERR, "malloc failed");
                         }
                         continue;
+                }
 
-                /*
-                 * The current protocol with the kernel component uses a
-                 * NULL key name to pass an error condition.
-                 * For the SET, GET and DELETE operations,
-                 * use the existing protocol to pass back error.
-                 */
+                switch (op) {
+                case KVP_OP_GET_IP_INFO:
+                        kvp_ip_val = &hv_msg->body.kvp_ip_val;
+                        if_name =
+                        kvp_mac_to_if_name((char *)kvp_ip_val->adapter_id);
+
+                        if (if_name == NULL) {
+                                /*
+                                 * We could not map the mac address to an
+                                 * interface name; return error.
+                                 */
+                                hv_msg->error = HV_E_FAIL;
+                                break;
+                        }
+                        error = kvp_get_ip_info(
+                                                0, if_name, KVP_OP_GET_IP_INFO,
+                                                kvp_ip_val,
+                                                (MAX_IP_ADDR_SIZE * 2));
+
+                        if (error)
+                                hv_msg->error = error;
+
+                        free(if_name);
+                        break;
+
+                case KVP_OP_SET_IP_INFO:
+                        kvp_ip_val = &hv_msg->body.kvp_ip_val;
+                        if_name = kvp_get_if_name(
+                                        (char *)kvp_ip_val->adapter_id);
+                        if (if_name == NULL) {
+                                /*
+                                 * We could not map the guid to an
+                                 * interface name; return error.
+                                 */
+                                hv_msg->error = HV_GUID_NOTFOUND;
+                                break;
+                        }
+                        error = kvp_set_ip_info(if_name, kvp_ip_val);
+                        if (error)
+                                hv_msg->error = error;
+
+                        free(if_name);
+                        break;
 
                 case KVP_OP_SET:
-                        if (kvp_key_add_or_modify(hv_msg->kvp_hdr.pool,
+                        if (kvp_key_add_or_modify(pool,
                                         hv_msg->body.kvp_set.data.key,
                                         hv_msg->body.kvp_set.data.key_size,
                                         hv_msg->body.kvp_set.data.value,
                                         hv_msg->body.kvp_set.data.value_size))
-                                strcpy(hv_msg->body.kvp_set.data.key, "");
+                                        hv_msg->error = HV_S_CONT;
                         break;
 
                 case KVP_OP_GET:
-                        if (kvp_get_value(hv_msg->kvp_hdr.pool,
+                        if (kvp_get_value(pool,
                                         hv_msg->body.kvp_set.data.key,
                                         hv_msg->body.kvp_set.data.key_size,
                                         hv_msg->body.kvp_set.data.value,
                                         hv_msg->body.kvp_set.data.value_size))
-                                strcpy(hv_msg->body.kvp_set.data.key, "");
+                                        hv_msg->error = HV_S_CONT;
                         break;
 
                 case KVP_OP_DELETE:
-                        if (kvp_key_delete(hv_msg->kvp_hdr.pool,
+                        if (kvp_key_delete(pool,
                                         hv_msg->body.kvp_delete.key,
                                         hv_msg->body.kvp_delete.key_size))
-                                strcpy(hv_msg->body.kvp_delete.key, "");
+                                        hv_msg->error = HV_S_CONT;
                         break;
 
                 default:
                         break;
                 }
 
-                if (hv_msg->kvp_hdr.operation != KVP_OP_ENUMERATE)
+                if (op != KVP_OP_ENUMERATE)
                         goto kvp_done;
 
                 /*
@@ -782,13 +1597,14 @@ int main(void)
                  * both the key and the value; if not read from the
                  * appropriate pool.
                  */
-                if (hv_msg->kvp_hdr.pool != KVP_POOL_AUTO) {
-                        kvp_pool_enumerate(hv_msg->kvp_hdr.pool,
+                if (pool != KVP_POOL_AUTO) {
+                        if (kvp_pool_enumerate(pool,
                                         hv_msg->body.kvp_enum_data.index,
                                         hv_msg->body.kvp_enum_data.data.key,
                                         HV_KVP_EXCHANGE_MAX_KEY_SIZE,
                                         hv_msg->body.kvp_enum_data.data.value,
-                                        HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
+                                        HV_KVP_EXCHANGE_MAX_VALUE_SIZE))
+                                        hv_msg->error = HV_S_CONT;
                         goto kvp_done;
                 }
 
@@ -807,13 +1623,13 @@ int main(void)
                         strcpy(key_value, lic_version);
                         break;
                 case NetworkAddressIPv4:
-                        kvp_get_ip_address(AF_INET, key_value,
-                                        HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
+                        kvp_get_ip_info(AF_INET, NULL, KVP_OP_ENUMERATE,
+                                key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
                         strcpy(key_name, "NetworkAddressIPv4");
                         break;
                 case NetworkAddressIPv6:
-                        kvp_get_ip_address(AF_INET6, key_value,
-                                        HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
+                        kvp_get_ip_info(AF_INET6, NULL, KVP_OP_ENUMERATE,
+                                key_value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE);
                         strcpy(key_name, "NetworkAddressIPv6");
                         break;
                 case OSBuildNumber:
@@ -841,11 +1657,7 @@ int main(void)
                         strcpy(key_name, "ProcessorArchitecture");
                         break;
                 default:
-                        strcpy(key_value, "Unknown Key");
-                        /*
-                         * We use a null key name to terminate enumeration.
-                         */
-                        strcpy(key_name, "");
+                        hv_msg->error = HV_S_CONT;
                         break;
                 }
                 /*
@@ -863,7 +1675,7 @@ kvp_done:
                 len = netlink_send(fd, incoming_cn_msg);
                 if (len < 0) {
                         syslog(LOG_ERR, "net_link send failed; error:%d", len);
-                        exit(-1);
+                        exit(EXIT_FAILURE);
                 }
         }
 
diff --git a/tools/hv/hv_set_ifconfig.sh b/tools/hv/hv_set_ifconfig.sh
new file mode 100755
index 000000000000..3e9427e08d80
--- /dev/null
+++ b/tools/hv/hv_set_ifconfig.sh
@@ -0,0 +1,68 @@
+#!/bin/bash
+
+# This example script activates an interface based on the specified
+# configuration.
+#
+# In the interest of keeping the KVP daemon code free of distro specific
+# information; the kvp daemon code invokes this external script to configure
+# the interface.
+#
+# The only argument to this script is the configuration file that is to
+# be used to configure the interface.
+#
+# Each Distro is expected to implement this script in a distro specific
+# fashion. For instance on Distros that ship with Network Manager enabled,
+# this script can be based on the Network Manager APIs for configuring the
+# interface.
+#
+# This example script is based on a RHEL environment.
+#
+# Here is the format of the ip configuration file:
+#
+# HWADDR=macaddr
+# IF_NAME=interface name
+# DHCP=yes (This is optional; if yes, DHCP is configured)
+#
+# IPADDR=ipaddr1
+# IPADDR_1=ipaddr2
+# IPADDR_x=ipaddry (where y = x + 1)
+#
+# NETMASK=netmask1
+# NETMASK_x=netmasky (where y = x + 1)
+#
+# GATEWAY=ipaddr1
+# GATEWAY_x=ipaddry (where y = x + 1)
+#
+# DNSx=ipaddrx (where first DNS address is tagged as DNS1 etc)
+#
+# IPV6 addresses will be tagged as IPV6ADDR, IPV6 gateway will be
+# tagged as IPV6_DEFAULTGW and IPV6 NETMASK will be tagged as
+# IPV6NETMASK.
+#
+# The host can specify multiple ipv4 and ipv6 addresses to be
+# configured for the interface. Furthermore, the configuration
+# needs to be persistent. A subsequent GET call on the interface
+# is expected to return the configuration that is set via the SET
+# call.
+#
+
+
+
+echo "IPV6INIT=yes" >> $1
+echo "NM_CONTROLLED=no" >> $1
+echo "PEERDNS=yes" >> $1
+echo "ONBOOT=yes" >> $1
+
+dhcp=$(grep "DHCP" $1 2>/dev/null)
+if [ "$dhcp" != "" ];
+then
+echo "BOOTPROTO=dhcp" >> $1;
+fi
+
+cp $1 /etc/sysconfig/network-scripts/
+
+
+interface=$(echo $1 | awk -F - '{ print $2 }')
+
+/sbin/ifdown $interface 2>/dev/null
+/sbin/ifup $interfac 2>/dev/null
diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
index 14131cb0522d..04d959fa0226 100644
--- a/tools/lib/traceevent/Makefile
+++ b/tools/lib/traceevent/Makefile
@@ -129,7 +129,7 @@ CFLAGS ?= -g -Wall
 
 # Append required CFLAGS
 override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
-override CFLAGS += $(udis86-flags)
+override CFLAGS += $(udis86-flags) -D_GNU_SOURCE
 
 ifeq ($(VERBOSE),1)
   Q =
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 5f34aa371b56..47264b4652b9 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -24,13 +24,14 @@
  *  Frederic Weisbecker gave his permission to relicense the code to
  *  the Lesser General Public License.
  */
-#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 #include <ctype.h>
 #include <errno.h>
+#include <stdint.h>
+#include <limits.h>
 
 #include "event-parse.h"
 #include "event-utils.h"
@@ -117,14 +118,7 @@ void breakpoint(void)
 
 struct print_arg *alloc_arg(void)
 {
-        struct print_arg *arg;
-
-        arg = malloc_or_die(sizeof(*arg));
-        if (!arg)
-                return NULL;
-        memset(arg, 0, sizeof(*arg));
-
-        return arg;
+        return calloc(1, sizeof(struct print_arg));
 }
 
 struct cmdline {
@@ -158,7 +152,9 @@ static int cmdline_init(struct pevent *pevent)
         struct cmdline *cmdlines;
         int i;
 
-        cmdlines = malloc_or_die(sizeof(*cmdlines) * pevent->cmdline_count);
+        cmdlines = malloc(sizeof(*cmdlines) * pevent->cmdline_count);
+        if (!cmdlines)
+                return -1;
 
         i = 0;
         while (cmdlist) {
@@ -186,8 +182,8 @@ static char *find_cmdline(struct pevent *pevent, int pid)
         if (!pid)
                 return "<idle>";
 
-        if (!pevent->cmdlines)
-                cmdline_init(pevent);
+        if (!pevent->cmdlines && cmdline_init(pevent))
+                return "<not enough memory for cmdlines!>";
 
         key.pid = pid;
 
@@ -215,8 +211,8 @@ int pevent_pid_is_registered(struct pevent *pevent, int pid)
         if (!pid)
                 return 1;
 
-        if (!pevent->cmdlines)
-                cmdline_init(pevent);
+        if (!pevent->cmdlines && cmdline_init(pevent))
+                return 0;
 
         key.pid = pid;
 
@@ -258,10 +254,14 @@ static int add_new_comm(struct pevent *pevent, const char *comm, int pid)
                 return -1;
         }
 
-        cmdlines[pevent->cmdline_count].pid = pid;
         cmdlines[pevent->cmdline_count].comm = strdup(comm);
-        if (!cmdlines[pevent->cmdline_count].comm)
-                die("malloc comm");
+        if (!cmdlines[pevent->cmdline_count].comm) {
+                free(cmdlines);
+                errno = ENOMEM;
+                return -1;
+        }
+
+        cmdlines[pevent->cmdline_count].pid = pid;
                 
         if (cmdlines[pevent->cmdline_count].comm)
                 pevent->cmdline_count++;
@@ -288,10 +288,15 @@ int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
         if (pevent->cmdlines)
                 return add_new_comm(pevent, comm, pid);
 
-        item = malloc_or_die(sizeof(*item));
+        item = malloc(sizeof(*item));
+        if (!item)
+                return -1;
+
         item->comm = strdup(comm);
-        if (!item->comm)
-                die("malloc comm");
+        if (!item->comm) {
+                free(item);
+                return -1;
+        }
         item->pid = pid;
         item->next = pevent->cmdlist;
 
@@ -355,7 +360,10 @@ static int func_map_init(struct pevent *pevent)
         struct func_map *func_map;
         int i;
 
-        func_map = malloc_or_die(sizeof(*func_map) * (pevent->func_count + 1));
+        func_map = malloc(sizeof(*func_map) * (pevent->func_count + 1));
+        if (!func_map)
+                return -1;
+
         funclist = pevent->funclist;
 
         i = 0;
@@ -455,25 +463,36 @@ pevent_find_function_address(struct pevent *pevent, unsigned long long addr)
 int pevent_register_function(struct pevent *pevent, char *func,
                              unsigned long long addr, char *mod)
 {
-        struct func_list *item;
+        struct func_list *item = malloc(sizeof(*item));
 
-        item = malloc_or_die(sizeof(*item));
+        if (!item)
+                return -1;
 
         item->next = pevent->funclist;
         item->func = strdup(func);
-        if (mod)
+        if (!item->func)
+                goto out_free;
+
+        if (mod) {
                 item->mod = strdup(mod);
-        else
+                if (!item->mod)
+                        goto out_free_func;
+        } else
                 item->mod = NULL;
         item->addr = addr;
 
-        if (!item->func || (mod && !item->mod))
-                die("malloc func");
-
         pevent->funclist = item;
         pevent->func_count++;
 
         return 0;
+
+out_free_func:
+        free(item->func);
+        item->func = NULL;
+out_free:
+        free(item);
+        errno = ENOMEM;
+        return -1;
 }
 
 /**
@@ -524,14 +543,16 @@ static int printk_cmp(const void *a, const void *b)
         return 0;
 }
 
-static void printk_map_init(struct pevent *pevent)
+static int printk_map_init(struct pevent *pevent)
 {
         struct printk_list *printklist;
         struct printk_list *item;
         struct printk_map *printk_map;
         int i;
 
-        printk_map = malloc_or_die(sizeof(*printk_map) * (pevent->printk_count + 1));
+        printk_map = malloc(sizeof(*printk_map) * (pevent->printk_count + 1));
+        if (!printk_map)
+                return -1;
 
         printklist = pevent->printklist;
 
@@ -549,6 +570,8 @@ static void printk_map_init(struct pevent *pevent)
 
         pevent->printk_map = printk_map;
         pevent->printklist = NULL;
+
+        return 0;
 }
 
 static struct printk_map *
@@ -557,8 +580,8 @@ find_printk(struct pevent *pevent, unsigned long long addr)
         struct printk_map *printk;
         struct printk_map key;
 
-        if (!pevent->printk_map)
-                printk_map_init(pevent);
+        if (!pevent->printk_map && printk_map_init(pevent))
+                return NULL;
 
         key.addr = addr;
 
@@ -580,21 +603,27 @@ find_printk(struct pevent *pevent, unsigned long long addr)
 int pevent_register_print_string(struct pevent *pevent, char *fmt,
                                  unsigned long long addr)
 {
-        struct printk_list *item;
+        struct printk_list *item = malloc(sizeof(*item));
 
-        item = malloc_or_die(sizeof(*item));
+        if (!item)
+                return -1;
 
         item->next = pevent->printklist;
-        item->printk = strdup(fmt);
         item->addr = addr;
 
+        item->printk = strdup(fmt);
         if (!item->printk)
-                die("malloc fmt");
+                goto out_free;
 
         pevent->printklist = item;
         pevent->printk_count++;
 
         return 0;
+
+out_free:
+        free(item);
+        errno = ENOMEM;
+        return -1;
 }
 
 /**
@@ -619,24 +648,18 @@ void pevent_print_printk(struct pevent *pevent)
 
 static struct event_format *alloc_event(void)
 {
-        struct event_format *event;
-
-        event = malloc(sizeof(*event));
-        if (!event)
-                return NULL;
-        memset(event, 0, sizeof(*event));
-
-        return event;
+        return calloc(1, sizeof(struct event_format));
 }
 
-static void add_event(struct pevent *pevent, struct event_format *event)
+static int add_event(struct pevent *pevent, struct event_format *event)
 {
         int i;
+        struct event_format **events = realloc(pevent->events, sizeof(event) *
+                                               (pevent->nr_events + 1));
+        if (!events)
+                return -1;
 
-        pevent->events = realloc(pevent->events, sizeof(event) *
-                                 (pevent->nr_events + 1));
-        if (!pevent->events)
-                die("Can not allocate events");
+        pevent->events = events;
 
         for (i = 0; i < pevent->nr_events; i++) {
                 if (pevent->events[i]->id > event->id)
@@ -651,6 +674,8 @@ static void add_event(struct pevent *pevent, struct event_format *event)
         pevent->nr_events++;
 
         event->pevent = pevent;
+
+        return 0;
 }
 
 static int event_item_type(enum event_type type)
@@ -827,9 +852,9 @@ static enum event_type __read_token(char **tok)
         switch (type) {
         case EVENT_NEWLINE:
         case EVENT_DELIM:
-                *tok = malloc_or_die(2);
-                (*tok)[0] = ch;
-                (*tok)[1] = 0;
+                if (asprintf(tok, "%c", ch) < 0)
+                        return EVENT_ERROR;
+
                 return type;
 
         case EVENT_OP:
@@ -1240,8 +1265,10 @@ static int event_read_fields(struct event_format *event, struct format_field **f
 
                 last_token = token;
 
-                field = malloc_or_die(sizeof(*field));
-                memset(field, 0, sizeof(*field));
+                field = calloc(1, sizeof(*field));
+                if (!field)
+                        goto fail;
+
                 field->event = event;
 
                 /* read the rest of the type */
@@ -1282,7 +1309,7 @@ static int event_read_fields(struct event_format *event, struct format_field **f
                 }
 
                 if (!field->type) {
-                        die("no type found");
+                        do_warning("%s: no type found", __func__);
                         goto fail;
                 }
                 field->name = last_token;
@@ -1329,7 +1356,7 @@ static int event_read_fields(struct event_format *event, struct format_field **f
                                 free_token(token);
                                 type = read_token(&token);
                                 if (type == EVENT_NONE) {
-                                        die("failed to find token");
+                                        do_warning("failed to find token");
                                         goto fail;
                                 }
                         }
@@ -1538,6 +1565,14 @@ process_cond(struct event_format *event, struct print_arg *top, char **tok)
         left = alloc_arg();
         right = alloc_arg();
 
+        if (!arg || !left || !right) {
+                do_warning("%s: not enough memory!", __func__);
+                /* arg will be freed at out_free */
+                free_arg(left);
+                free_arg(right);
+                goto out_free;
+        }
+
         arg->type = PRINT_OP;
         arg->op.left = left;
         arg->op.right = right;
@@ -1580,6 +1615,12 @@ process_array(struct event_format *event, struct print_arg *top, char **tok)
         char *token = NULL;
 
         arg = alloc_arg();
+        if (!arg) {
+                do_warning("%s: not enough memory!", __func__);
+                /* '*tok' is set to top->op.op.  No need to free. */
+                *tok = NULL;
+                return EVENT_ERROR;
+        }
 
         *tok = NULL;
         type = process_arg(event, arg, &token);
@@ -1595,8 +1636,7 @@ process_array(struct event_format *event, struct print_arg *top, char **tok)
         return type;
 
 out_free:
-        free_token(*tok);
-        *tok = NULL;
+        free_token(token);
         free_arg(arg);
         return EVENT_ERROR;
 }
@@ -1682,7 +1722,7 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
         if (arg->type == PRINT_OP && !arg->op.left) {
                 /* handle single op */
                 if (token[1]) {
-                        die("bad op token %s", token);
+                        do_warning("bad op token %s", token);
                         goto out_free;
                 }
                 switch (token[0]) {
@@ -1699,10 +1739,16 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
 
                 /* make an empty left */
                 left = alloc_arg();
+                if (!left)
+                        goto out_warn_free;
+
                 left->type = PRINT_NULL;
                 arg->op.left = left;
 
                 right = alloc_arg();
+                if (!right)
+                        goto out_warn_free;
+
                 arg->op.right = right;
 
                 /* do not free the token, it belongs to an op */
@@ -1712,6 +1758,9 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
         } else if (strcmp(token, "?") == 0) {
 
                 left = alloc_arg();
+                if (!left)
+                        goto out_warn_free;
+
                 /* copy the top arg to the left */
                 *left = *arg;
 
@@ -1720,6 +1769,7 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
                 arg->op.left = left;
                 arg->op.prio = 0;
 
+                /* it will set arg->op.right */
                 type = process_cond(event, arg, tok);
 
         } else if (strcmp(token, ">>") == 0 ||
@@ -1739,6 +1789,8 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
                    strcmp(token, "!=") == 0) {
 
                 left = alloc_arg();
+                if (!left)
+                        goto out_warn_free;
 
                 /* copy the top arg to the left */
                 *left = *arg;
@@ -1746,6 +1798,7 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
                 arg->type = PRINT_OP;
                 arg->op.op = token;
                 arg->op.left = left;
+                arg->op.right = NULL;
 
                 if (set_op_prio(arg) == -1) {
                         event->flags |= EVENT_FL_FAILED;
@@ -1762,12 +1815,14 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
                     type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
                         char *new_atom;
 
-                        if (left->type != PRINT_ATOM)
-                                die("bad pointer type");
+                        if (left->type != PRINT_ATOM) {
+                                do_warning("bad pointer type");
+                                goto out_free;
+                        }
                         new_atom = realloc(left->atom.atom,
                                             strlen(left->atom.atom) + 3);
                         if (!new_atom)
-                                goto out_free;
+                                goto out_warn_free;
 
                         left->atom.atom = new_atom;
                         strcat(left->atom.atom, " *");
@@ -1779,12 +1834,18 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
                 }
 
                 right = alloc_arg();
+                if (!right)
+                        goto out_warn_free;
+
                 type = process_arg_token(event, right, tok, type);
                 arg->op.right = right;
 
         } else if (strcmp(token, "[") == 0) {
 
                 left = alloc_arg();
+                if (!left)
+                        goto out_warn_free;
+
                 *left = *arg;
 
                 arg->type = PRINT_OP;
@@ -1793,6 +1854,7 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
 
                 arg->op.prio = 0;
 
+                /* it will set arg->op.right */
                 type = process_array(event, arg, tok);
 
         } else {
@@ -1816,14 +1878,16 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
 
         return type;
 
- out_free:
+out_warn_free:
+        do_warning("%s: not enough memory!", __func__);
+out_free:
         free_token(token);
         *tok = NULL;
         return EVENT_ERROR;
 }
 
 static enum event_type
-process_entry(struct event_format *event __unused, struct print_arg *arg,
+process_entry(struct event_format *event __maybe_unused, struct print_arg *arg,
               char **tok)
 {
         enum event_type type;
@@ -1880,7 +1944,11 @@ eval_type_str(unsigned long long val, const char *type, int pointer)
                         return val;
                 }
 
-                ref = malloc_or_die(len);
+                ref = malloc(len);
+                if (!ref) {
+                        do_warning("%s: not enough memory!", __func__);
+                        return val;
+                }
                 memcpy(ref, type, len);
 
                 /* chop off the " *" */
@@ -1957,8 +2025,10 @@ eval_type_str(unsigned long long val, const char *type, int pointer)
 static unsigned long long
 eval_type(unsigned long long val, struct print_arg *arg, int pointer)
 {
-        if (arg->type != PRINT_TYPE)
-                die("expected type argument");
+        if (arg->type != PRINT_TYPE) {
+                do_warning("expected type argument");
+                return 0;
+        }
 
         return eval_type_str(val, arg->typecast.type, pointer);
 }
@@ -2143,7 +2213,7 @@ static char *arg_eval (struct print_arg *arg)
         case PRINT_STRING:
         case PRINT_BSTRING:
         default:
-                die("invalid eval type %d", arg->type);
+                do_warning("invalid eval type %d", arg->type);
                 break;
         }
 
@@ -2166,6 +2236,8 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char **
                         break;
 
                 arg = alloc_arg();
+                if (!arg)
+                        goto out_free;
 
                 free_token(token);
                 type = process_arg(event, arg, &token);
@@ -2179,30 +2251,33 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char **
                 if (test_type_token(type, token, EVENT_DELIM, ","))
                         goto out_free;
 
-                field = malloc_or_die(sizeof(*field));
-                memset(field, 0, sizeof(*field));
+                field = calloc(1, sizeof(*field));
+                if (!field)
+                        goto out_free;
 
                 value = arg_eval(arg);
                 if (value == NULL)
-                        goto out_free;
+                        goto out_free_field;
                 field->value = strdup(value);
                 if (field->value == NULL)
-                        goto out_free;
+                        goto out_free_field;
 
                 free_arg(arg);
                 arg = alloc_arg();
+                if (!arg)
+                        goto out_free;
 
                 free_token(token);
                 type = process_arg(event, arg, &token);
                 if (test_type_token(type, token, EVENT_OP, "}"))
-                        goto out_free;
+                        goto out_free_field;
 
                 value = arg_eval(arg);
                 if (value == NULL)
-                        goto out_free;
+                        goto out_free_field;
                 field->str = strdup(value);
                 if (field->str == NULL)
-                        goto out_free;
+                        goto out_free_field;
                 free_arg(arg);
                 arg = NULL;
 
@@ -2216,6 +2291,8 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char **
         *tok = token;
         return type;
 
+out_free_field:
+        free_flag_sym(field);
 out_free:
         free_arg(arg);
         free_token(token);
@@ -2235,6 +2312,10 @@ process_flags(struct event_format *event, struct print_arg *arg, char **tok)
         arg->type = PRINT_FLAGS;
 
         field = alloc_arg();
+        if (!field) {
+                do_warning("%s: not enough memory!", __func__);
+                goto out_free;
+        }
 
         type = process_arg(event, field, &token);
 
@@ -2243,7 +2324,7 @@ process_flags(struct event_format *event, struct print_arg *arg, char **tok)
                 type = process_op(event, field, &token);
 
         if (test_type_token(type, token, EVENT_DELIM, ","))
-                goto out_free;
+                goto out_free_field;
         free_token(token);
 
         arg->flags.field = field;
@@ -2265,7 +2346,9 @@ process_flags(struct event_format *event, struct print_arg *arg, char **tok)
         type = read_token_item(tok);
         return type;
 
- out_free:
+out_free_field:
+        free_arg(field);
+out_free:
         free_token(token);
         *tok = NULL;
         return EVENT_ERROR;
@@ -2282,10 +2365,14 @@ process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
         arg->type = PRINT_SYMBOL;
 
         field = alloc_arg();
+        if (!field) {
+                do_warning("%s: not enough memory!", __func__);
+                goto out_free;
+        }
 
         type = process_arg(event, field, &token);
         if (test_type_token(type, token, EVENT_DELIM, ","))
-                goto out_free;
+                goto out_free_field;
 
         arg->symbol.field = field;
 
@@ -2297,7 +2384,9 @@ process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
         type = read_token_item(tok);
         return type;
 
- out_free:
+out_free_field:
+        free_arg(field);
+out_free:
         free_token(token);
         *tok = NULL;
         return EVENT_ERROR;
@@ -2314,6 +2403,11 @@ process_hex(struct event_format *event, struct print_arg *arg, char **tok)
         arg->type = PRINT_HEX;
 
         field = alloc_arg();
+        if (!field) {
+                do_warning("%s: not enough memory!", __func__);
+                goto out_free;
+        }
+
         type = process_arg(event, field, &token);
 
         if (test_type_token(type, token, EVENT_DELIM, ","))
@@ -2324,6 +2418,12 @@ process_hex(struct event_format *event, struct print_arg *arg, char **tok)
         free_token(token);
 
         field = alloc_arg();
+        if (!field) {
+                do_warning("%s: not enough memory!", __func__);
+                *tok = NULL;
+                return EVENT_ERROR;
+        }
+
         type = process_arg(event, field, &token);
 
         if (test_type_token(type, token, EVENT_DELIM, ")"))
@@ -2381,6 +2481,12 @@ process_dynamic_array(struct event_format *event, struct print_arg *arg, char **
 
         free_token(token);
         arg = alloc_arg();
+        if (!field) {
+                do_warning("%s: not enough memory!", __func__);
+                *tok = NULL;
+                return EVENT_ERROR;
+        }
+
         type = process_arg(event, arg, &token);
         if (type == EVENT_ERROR)
                 goto out_free_arg;
@@ -2434,10 +2540,16 @@ process_paren(struct event_format *event, struct print_arg *arg, char **tok)
                 /* make this a typecast and contine */
 
                 /* prevous must be an atom */
-                if (arg->type != PRINT_ATOM)
-                        die("previous needed to be PRINT_ATOM");
+                if (arg->type != PRINT_ATOM) {
+                        do_warning("previous needed to be PRINT_ATOM");
+                        goto out_free;
+                }
 
                 item_arg = alloc_arg();
+                if (!item_arg) {
+                        do_warning("%s: not enough memory!", __func__);
+                        goto out_free;
+                }
 
                 arg->type = PRINT_TYPE;
                 arg->typecast.type = arg->atom.atom;
@@ -2457,7 +2569,8 @@ process_paren(struct event_format *event, struct print_arg *arg, char **tok)
 
 
 static enum event_type
-process_str(struct event_format *event __unused, struct print_arg *arg, char **tok)
+process_str(struct event_format *event __maybe_unused, struct print_arg *arg,
+            char **tok)
 {
         enum event_type type;
         char *token;
@@ -2532,6 +2645,11 @@ process_func_handler(struct event_format *event, struct pevent_function_handler
         next_arg = &(arg->func.args);
         for (i = 0; i < func->nr_args; i++) {
                 farg = alloc_arg();
+                if (!farg) {
+                        do_warning("%s: not enough memory!", __func__);
+                        return EVENT_ERROR;
+                }
+
                 type = process_arg(event, farg, &token);
                 if (i < (func->nr_args - 1))
                         test = ",";
@@ -2676,7 +2794,8 @@ process_arg_token(struct event_format *event, struct print_arg *arg,
 
         case EVENT_ERROR ... EVENT_NEWLINE:
         default:
-                die("unexpected type %d", type);
+                do_warning("unexpected type %d", type);
+                return EVENT_ERROR;
         }
         *tok = token;
 
@@ -2697,6 +2816,10 @@ static int event_read_print_args(struct event_format *event, struct print_arg **
                 }
 
                 arg = alloc_arg();
+                if (!arg) {
+                        do_warning("%s: not enough memory!", __func__);
+                        return -1;
+                }
 
                 type = process_arg(event, arg, &token);
 
@@ -2768,10 +2891,8 @@ static int event_read_print(struct event_format *event)
         if (type == EVENT_DQUOTE) {
                 char *cat;
 
-                cat = malloc_or_die(strlen(event->print_fmt.format) +
-                                    strlen(token) + 1);
-                strcpy(cat, event->print_fmt.format);
-                strcat(cat, token);
+                if (asprintf(&cat, "%s%s", event->print_fmt.format, token) < 0)
+                        goto fail;
                 free_token(token);
                 free_token(event->print_fmt.format);
                 event->print_fmt.format = NULL;
@@ -2925,8 +3046,10 @@ static int get_common_info(struct pevent *pevent,
          * All events should have the same common elements.
          * Pick any event to find where the type is;
          */
-        if (!pevent->events)
-                die("no event_list!");
+        if (!pevent->events) {
+                do_warning("no event_list!");
+                return -1;
+        }
 
         event = pevent->events[0];
         field = pevent_find_common_field(event, type);
@@ -3084,7 +3207,8 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
                 if (!arg->field.field) {
                         arg->field.field = pevent_find_any_field(event, arg->field.name);
                         if (!arg->field.field)
-                                die("field %s not found", arg->field.name);
+                                goto out_warning_field;
+                        
                 }
                 /* must be a number */
                 val = pevent_read_number(pevent, data + arg->field.field->offset,
@@ -3145,8 +3269,10 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
                                 if (!larg->field.field) {
                                         larg->field.field =
                                                 pevent_find_any_field(event, larg->field.name);
-                                        if (!larg->field.field)
-                                                die("field %s not found", larg->field.name);
+                                        if (!larg->field.field) {
+                                                arg = larg;
+                                                goto out_warning_field;
+                                        }
                                 }
                                 field_size = larg->field.field->elementsize;
                                 offset = larg->field.field->offset +
@@ -3182,7 +3308,7 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
                                 val = left != right;
                                 break;
                         default:
-                                die("unknown op '%s'", arg->op.op);
+                                goto out_warning_op;
                         }
                         break;
                 case '~':
@@ -3212,7 +3338,7 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
                                 val = left <= right;
                                 break;
                         default:
-                                die("unknown op '%s'", arg->op.op);
+                                goto out_warning_op;
                         }
                         break;
                 case '>':
@@ -3227,12 +3353,13 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
                                 val = left >= right;
                                 break;
                         default:
-                                die("unknown op '%s'", arg->op.op);
+                                goto out_warning_op;
                         }
                         break;
                 case '=':
                         if (arg->op.op[1] != '=')
-                                die("unknown op '%s'", arg->op.op);
+                                goto out_warning_op;
+
                         val = left == right;
                         break;
                 case '-':
@@ -3248,13 +3375,21 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
                         val = left * right;
                         break;
                 default:
-                        die("unknown op '%s'", arg->op.op);
+                        goto out_warning_op;
                 }
                 break;
         default: /* not sure what to do there */
                 return 0;
         }
         return val;
+
+out_warning_op:
+        do_warning("%s: unknown op '%s'", __func__, arg->op.op);
+        return 0;
+
+out_warning_field:
+        do_warning("%s: field %s not found", __func__, arg->field.name);
+        return 0;
 }
 
 struct flag {
@@ -3331,8 +3466,10 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
                 field = arg->field.field;
                 if (!field) {
                         field = pevent_find_any_field(event, arg->field.name);
-                        if (!field)
-                                die("field %s not found", arg->field.name);
+                        if (!field) {
+                                str = arg->field.name;
+                                goto out_warning_field;
+                        }
                         arg->field.field = field;
                 }
                 /* Zero sized fields, mean the rest of the data */
@@ -3349,7 +3486,11 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
                         trace_seq_printf(s, "%lx", addr);
                         break;
                 }
-                str = malloc_or_die(len + 1);
+                str = malloc(len + 1);
+                if (!str) {
+                        do_warning("%s: not enough memory!", __func__);
+                        return;
+                }
                 memcpy(str, data + field->offset, len);
                 str[len] = 0;
                 print_str_to_seq(s, format, len_arg, str);
@@ -3389,7 +3530,7 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
                         str = arg->hex.field->field.name;
                         field = pevent_find_any_field(event, str);
                         if (!field)
-                                die("field %s not found", str);
+                                goto out_warning_field;
                         arg->hex.field->field.field = field;
                 }
                 hex = data + field->offset;
@@ -3441,6 +3582,11 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
                 /* well... */
                 break;
         }
+
+        return;
+
+out_warning_field:
+        do_warning("%s: field %s not found", __func__, arg->field.name);
 }
 
 static unsigned long long
@@ -3467,7 +3613,11 @@ process_defined_func(struct trace_seq *s, void *data, int size,
         farg = arg->func.args;
         param = func_handle->params;
 
-        args = malloc_or_die(sizeof(*args) * func_handle->nr_args);
+        ret = ULLONG_MAX;
+        args = malloc(sizeof(*args) * func_handle->nr_args);
+        if (!args)
+                goto out;
+
         for (i = 0; i < func_handle->nr_args; i++) {
                 switch (param->type) {
                 case PEVENT_FUNC_ARG_INT:
@@ -3479,13 +3629,19 @@ process_defined_func(struct trace_seq *s, void *data, int size,
                         trace_seq_init(&str);
                         print_str_arg(&str, data, size, event, "%s", -1, farg);
                         trace_seq_terminate(&str);
-                        string = malloc_or_die(sizeof(*string));
+                        string = malloc(sizeof(*string));
+                        if (!string) {
+                                do_warning("%s(%d): malloc str", __func__, __LINE__);
+                                goto out_free;
+                        }
                         string->next = strings;
                         string->str = strdup(str.buffer);
-                        if (!string->str)
-                                die("malloc str");
-
-                        args[i] = (unsigned long long)string->str;
+                        if (!string->str) {
+                                free(string);
+                                do_warning("%s(%d): malloc str", __func__, __LINE__);
+                                goto out_free;
+                        }
+                        args[i] = (uintptr_t)string->str;
                         strings = string;
                         trace_seq_destroy(&str);
                         break;
@@ -3494,14 +3650,15 @@ process_defined_func(struct trace_seq *s, void *data, int size,
                          * Something went totally wrong, this is not
                          * an input error, something in this code broke.
                          */
-                        die("Unexpected end of arguments\n");
-                        break;
+                        do_warning("Unexpected end of arguments\n");
+                        goto out_free;
                 }
                 farg = farg->next;
                 param = param->next;
         }
 
         ret = (*func_handle->func)(s, args);
+out_free:
         free(args);
         while (strings) {
                 string = strings;
@@ -3515,6 +3672,18 @@ process_defined_func(struct trace_seq *s, void *data, int size,
         return ret;
 }
 
+static void free_args(struct print_arg *args)
+{
+        struct print_arg *next;
+
+        while (args) {
+                next = args->next;
+
+                free_arg(args);
+                args = next;
+        }
+}
+
 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
 {
         struct pevent *pevent = event->pevent;
@@ -3530,11 +3699,15 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc
 
         if (!field) {
                 field = pevent_find_field(event, "buf");
-                if (!field)
-                        die("can't find buffer field for binary printk");
+                if (!field) {
+                        do_warning("can't find buffer field for binary printk");
+                        return NULL;
+                }
                 ip_field = pevent_find_field(event, "ip");
-                if (!ip_field)
-                        die("can't find ip field for binary printk");
+                if (!ip_field) {
+                        do_warning("can't find ip field for binary printk");
+                        return NULL;
+                }
                 pevent->bprint_buf_field = field;
                 pevent->bprint_ip_field = ip_field;
         }
@@ -3545,13 +3718,18 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc
          * The first arg is the IP pointer.
          */
         args = alloc_arg();
+        if (!args) {
+                do_warning("%s(%d): not enough memory!", __func__, __LINE__);
+                return NULL;
+        }
         arg = args;
         arg->next = NULL;
         next = &arg->next;
 
         arg->type = PRINT_ATOM;
-        arg->atom.atom = malloc_or_die(32);
-        sprintf(arg->atom.atom, "%lld", ip);
+                
+        if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
+                goto out_free;
 
         /* skip the first "%pf : " */
         for (ptr = fmt + 6, bptr = data + field->offset;
@@ -3606,10 +3784,17 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc
                                 val = pevent_read_number(pevent, bptr, vsize);
                                 bptr += vsize;
                                 arg = alloc_arg();
+                                if (!arg) {
+                                        do_warning("%s(%d): not enough memory!",
+                                                   __func__, __LINE__);
+                                        goto out_free;
+                                }
                                 arg->next = NULL;
                                 arg->type = PRINT_ATOM;
-                                arg->atom.atom = malloc_or_die(32);
-                                sprintf(arg->atom.atom, "%lld", val);
+                                if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
+                                        free(arg);
+                                        goto out_free;
+                                }
                                 *next = arg;
                                 next = &arg->next;
                                 /*
@@ -3622,11 +3807,16 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc
                                 break;
                         case 's':
                                 arg = alloc_arg();
+                                if (!arg) {
+                                        do_warning("%s(%d): not enough memory!",
+                                                   __func__, __LINE__);
+                                        goto out_free;
+                                }
                                 arg->next = NULL;
                                 arg->type = PRINT_BSTRING;
                                 arg->string.string = strdup(bptr);
                                 if (!arg->string.string)
-                                        break;
+                                        goto out_free;
                                 bptr += strlen(bptr) + 1;
                                 *next = arg;
                                 next = &arg->next;
@@ -3637,22 +3827,15 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc
         }
 
         return args;
-}
 
-static void free_args(struct print_arg *args)
-{
-        struct print_arg *next;
-
-        while (args) {
-                next = args->next;
-
-                free_arg(args);
-                args = next;
-        }
+out_free:
+        free_args(args);
+        return NULL;
 }
 
 static char *
-get_bprint_format(void *data, int size __unused, struct event_format *event)
+get_bprint_format(void *data, int size __maybe_unused,
+                  struct event_format *event)
 {
         struct pevent *pevent = event->pevent;
         unsigned long long addr;
@@ -3665,8 +3848,10 @@ get_bprint_format(void *data, int size __unused, struct event_format *event)
 
         if (!field) {
                 field = pevent_find_field(event, "fmt");
-                if (!field)
-                        die("can't find format field for binary printk");
+                if (!field) {
+                        do_warning("can't find format field for binary printk");
+                        return NULL;
+                }
                 pevent->bprint_fmt_field = field;
         }
 
@@ -3674,9 +3859,8 @@ get_bprint_format(void *data, int size __unused, struct event_format *event)
 
         printk = find_printk(pevent, addr);
         if (!printk) {
-                format = malloc_or_die(45);
-                sprintf(format, "%%pf : (NO FORMAT FOUND at %llx)\n",
-                        addr);
+                if (asprintf(&format, "%%pf : (NO FORMAT FOUND at %llx)\n", addr) < 0)
+                        return NULL;
                 return format;
         }
 
@@ -3684,8 +3868,8 @@ get_bprint_format(void *data, int size __unused, struct event_format *event)
         /* Remove any quotes. */
         if (*p == '"')
                 p++;
-        format = malloc_or_die(strlen(p) + 10);
-        sprintf(format, "%s : %s", "%pf", p);
+        if (asprintf(&format, "%s : %s", "%pf", p) < 0)
+                return NULL;
         /* remove ending quotes and new line since we will add one too */
         p = format + strlen(format) - 1;
         if (*p == '"')
@@ -3720,8 +3904,11 @@ static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
         if (!arg->field.field) {
                 arg->field.field =
                         pevent_find_any_field(event, arg->field.name);
-                if (!arg->field.field)
-                        die("field %s not found", arg->field.name);
+                if (!arg->field.field) {
+                        do_warning("%s: field %s not found",
+                                   __func__, arg->field.name);
+                        return;
+                }
         }
         if (arg->field.field->size != 6) {
                 trace_seq_printf(s, "INVALIDMAC");
@@ -3888,8 +4075,11 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
                                 goto cont_process;
                         case '*':
                                 /* The argument is the length. */
-                                if (!arg)
-                                        die("no argument match");
+                                if (!arg) {
+                                        do_warning("no argument match");
+                                        event->flags |= EVENT_FL_FAILED;
+                                        goto out_failed;
+                                }
                                 len_arg = eval_num_arg(data, size, event, arg);
                                 len_as_arg = 1;
                                 arg = arg->next;
@@ -3922,15 +4112,21 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
                         case 'x':
                         case 'X':
                         case 'u':
-                                if (!arg)
-                                        die("no argument match");
+                                if (!arg) {
+                                        do_warning("no argument match");
+                                        event->flags |= EVENT_FL_FAILED;
+                                        goto out_failed;
+                                }
 
                                 len = ((unsigned long)ptr + 1) -
                                         (unsigned long)saveptr;
 
                                 /* should never happen */
-                                if (len > 31)
-                                        die("bad format!");
+                                if (len > 31) {
+                                        do_warning("bad format!");
+                                        event->flags |= EVENT_FL_FAILED;
+                                        len = 31;
+                                }
 
                                 memcpy(format, saveptr, len);
                                 format[len] = 0;
@@ -3994,19 +4190,26 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
                                                 trace_seq_printf(s, format, (long long)val);
                                         break;
                                 default:
-                                        die("bad count (%d)", ls);
+                                        do_warning("bad count (%d)", ls);
+                                        event->flags |= EVENT_FL_FAILED;
                                 }
                                 break;
                         case 's':
-                                if (!arg)
-                                        die("no matching argument");
+                                if (!arg) {
+                                        do_warning("no matching argument");
+                                        event->flags |= EVENT_FL_FAILED;
+                                        goto out_failed;
+                                }
 
                                 len = ((unsigned long)ptr + 1) -
                                         (unsigned long)saveptr;
 
                                 /* should never happen */
-                                if (len > 31)
-                                        die("bad format!");
+                                if (len > 31) {
+                                        do_warning("bad format!");
+                                        event->flags |= EVENT_FL_FAILED;
+                                        len = 31;
+                                }
 
                                 memcpy(format, saveptr, len);
                                 format[len] = 0;
@@ -4024,6 +4227,11 @@ static void pretty_print(struct trace_seq *s, void *data, int size, struct event
                         trace_seq_putc(s, *ptr);
         }
 
+        if (event->flags & EVENT_FL_FAILED) {
+out_failed:
+                trace_seq_printf(s, "[FAILED TO PARSE]");
+        }
+
         if (args) {
                 free_args(args);
                 free(bprint_fmt);
@@ -4356,7 +4564,10 @@ get_event_fields(const char *type, const char *name,
         struct format_field *field;
         int i = 0;
 
-        fields = malloc_or_die(sizeof(*fields) * (count + 1));
+        fields = malloc(sizeof(*fields) * (count + 1));
+        if (!fields)
+                return NULL;
+
         for (field = list; field; field = field->next) {
                 fields[i++] = field;
                 if (i == count + 1) {
@@ -4672,8 +4883,7 @@ static int find_event_handle(struct pevent *pevent, struct event_format *event)
 }
 
 /**
- * pevent_parse_event - parse the event format
- * @pevent: the handle to the pevent
+ * __pevent_parse_format - parse the event format
  * @buf: the buffer storing the event format string
  * @size: the size of @buf
  * @sys: the system the event belongs to
@@ -4685,28 +4895,27 @@ static int find_event_handle(struct pevent *pevent, struct event_format *event)
  *
  * /sys/kernel/debug/tracing/events/.../.../format
  */
-int pevent_parse_event(struct pevent *pevent,
-                       const char *buf, unsigned long size,
-                       const char *sys)
+enum pevent_errno __pevent_parse_format(struct event_format **eventp,
+                                        struct pevent *pevent, const char *buf,
+                                        unsigned long size, const char *sys)
 {
         struct event_format *event;
         int ret;
 
         init_input_buf(buf, size);
 
-        event = alloc_event();
+        *eventp = event = alloc_event();
         if (!event)
-                return -ENOMEM;
+                return PEVENT_ERRNO__MEM_ALLOC_FAILED;
 
         event->name = event_read_name();
         if (!event->name) {
                 /* Bad event? */
-                free(event);
-                return -1;
+                ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
+                goto event_alloc_failed;
         }
 
         if (strcmp(sys, "ftrace") == 0) {
-
                 event->flags |= EVENT_FL_ISFTRACE;
 
                 if (strcmp(event->name, "bprint") == 0)
@@ -4714,74 +4923,189 @@ int pevent_parse_event(struct pevent *pevent,
         }
                 
         event->id = event_read_id();
-        if (event->id < 0)
-                die("failed to read event id");
+        if (event->id < 0) {
+                ret = PEVENT_ERRNO__READ_ID_FAILED;
+                /*
+                 * This isn't an allocation error actually.
+                 * But as the ID is critical, just bail out.
+                 */
+                goto event_alloc_failed;
+        }
 
         event->system = strdup(sys);
-        if (!event->system)
-                die("failed to allocate system");
-
-        /* Add pevent to event so that it can be referenced */
-        event->pevent = pevent;
+        if (!event->system) {
+                ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
+                goto event_alloc_failed;
+        }
 
         ret = event_read_format(event);
         if (ret < 0) {
-                do_warning("failed to read event format for %s", event->name);
-                goto event_failed;
+                ret = PEVENT_ERRNO__READ_FORMAT_FAILED;
+                goto event_parse_failed;
         }
 
         /*
          * If the event has an override, don't print warnings if the event
          * print format fails to parse.
          */
-        if (find_event_handle(pevent, event))
+        if (pevent && find_event_handle(pevent, event))
                 show_warning = 0;
 
         ret = event_read_print(event);
-        if (ret < 0) {
-                do_warning("failed to read event print fmt for %s",
-                           event->name);
-                show_warning = 1;
-                goto event_failed;
-        }
         show_warning = 1;
 
-        add_event(pevent, event);
+        if (ret < 0) {
+                ret = PEVENT_ERRNO__READ_PRINT_FAILED;
+                goto event_parse_failed;
+        }
 
         if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
                 struct format_field *field;
                 struct print_arg *arg, **list;
 
                 /* old ftrace had no args */
-
                 list = &event->print_fmt.args;
                 for (field = event->format.fields; field; field = field->next) {
                         arg = alloc_arg();
-                        *list = arg;
-                        list = &arg->next;
+                        if (!arg) {
+                                event->flags |= EVENT_FL_FAILED;
+                                return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
+                        }
                         arg->type = PRINT_FIELD;
                         arg->field.name = strdup(field->name);
                         if (!arg->field.name) {
-                                do_warning("failed to allocate field name");
                                 event->flags |= EVENT_FL_FAILED;
-                                return -1;
+                                free_arg(arg);
+                                return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
                         }
                         arg->field.field = field;
+                        *list = arg;
+                        list = &arg->next;
                 }
                 return 0;
         }
 
+        return 0;
+
+ event_parse_failed:
+        event->flags |= EVENT_FL_FAILED;
+        return ret;
+
+ event_alloc_failed:
+        free(event->system);
+        free(event->name);
+        free(event);
+        *eventp = NULL;
+        return ret;
+}
+
+/**
+ * pevent_parse_format - parse the event format
+ * @buf: the buffer storing the event format string
+ * @size: the size of @buf
+ * @sys: the system the event belongs to
+ *
+ * This parses the event format and creates an event structure
+ * to quickly parse raw data for a given event.
+ *
+ * These files currently come from:
+ *
+ * /sys/kernel/debug/tracing/events/.../.../format
+ */
+enum pevent_errno pevent_parse_format(struct event_format **eventp, const char *buf,
+                                      unsigned long size, const char *sys)
+{
+        return __pevent_parse_format(eventp, NULL, buf, size, sys);
+}
+
+/**
+ * pevent_parse_event - parse the event format
+ * @pevent: the handle to the pevent
+ * @buf: the buffer storing the event format string
+ * @size: the size of @buf
+ * @sys: the system the event belongs to
+ *
+ * This parses the event format and creates an event structure
+ * to quickly parse raw data for a given event.
+ *
+ * These files currently come from:
+ *
+ * /sys/kernel/debug/tracing/events/.../.../format
+ */
+enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
+                                     unsigned long size, const char *sys)
+{
+        struct event_format *event = NULL;
+        int ret = __pevent_parse_format(&event, pevent, buf, size, sys);
+
+        if (event == NULL)
+                return ret;
+
+        /* Add pevent to event so that it can be referenced */
+        event->pevent = pevent;
+
+        if (add_event(pevent, event)) {
+                ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
+                goto event_add_failed;
+        }
+
 #define PRINT_ARGS 0
         if (PRINT_ARGS && event->print_fmt.args)
                 print_args(event->print_fmt.args);
 
         return 0;
 
- event_failed:
-        event->flags |= EVENT_FL_FAILED;
-        /* still add it even if it failed */
-        add_event(pevent, event);
-        return -1;
+event_add_failed:
+        pevent_free_format(event);
+        return ret;
+}
+
+#undef _PE
+#define _PE(code, str) str
+static const char * const pevent_error_str[] = {
+        PEVENT_ERRORS
+};
+#undef _PE
+
+int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
+                    char *buf, size_t buflen)
+{
+        int idx;
+        const char *msg;
+
+        if (errnum >= 0) {
+                msg = strerror_r(errnum, buf, buflen);
+                if (msg != buf) {
+                        size_t len = strlen(msg);
+                        memcpy(buf, msg, min(buflen - 1, len));
+                        *(buf + min(buflen - 1, len)) = '\0';
+                }
+                return 0;
+        }
+
+        if (errnum <= __PEVENT_ERRNO__START ||
+            errnum >= __PEVENT_ERRNO__END)
+                return -1;
+
+        idx = errnum - __PEVENT_ERRNO__START - 1;
+        msg = pevent_error_str[idx];
+
+        switch (errnum) {
+        case PEVENT_ERRNO__MEM_ALLOC_FAILED:
+        case PEVENT_ERRNO__PARSE_EVENT_FAILED:
+        case PEVENT_ERRNO__READ_ID_FAILED:
+        case PEVENT_ERRNO__READ_FORMAT_FAILED:
+        case PEVENT_ERRNO__READ_PRINT_FAILED:
+        case PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED:
+                snprintf(buf, buflen, "%s", msg);
+                break;
+
+        default:
+                /* cannot reach here */
+                break;
+        }
+
+        return 0;
 }
 
 int get_field_val(struct trace_seq *s, struct format_field *field,
@@ -5000,6 +5324,7 @@ int pevent_register_print_function(struct pevent *pevent,
         struct pevent_func_params *param;
         enum pevent_func_arg_type type;
         va_list ap;
+        int ret;
 
         func_handle = find_func_handler(pevent, name);
         if (func_handle) {
@@ -5012,14 +5337,20 @@ int pevent_register_print_function(struct pevent *pevent,
                 remove_func_handler(pevent, name);
         }
 
-        func_handle = malloc_or_die(sizeof(*func_handle));
-        memset(func_handle, 0, sizeof(*func_handle));
+        func_handle = calloc(1, sizeof(*func_handle));
+        if (!func_handle) {
+                do_warning("Failed to allocate function handler");
+                return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+        }
 
         func_handle->ret_type = ret_type;
         func_handle->name = strdup(name);
         func_handle->func = func;
-        if (!func_handle->name)
-                die("Failed to allocate function name");
+        if (!func_handle->name) {
+                do_warning("Failed to allocate function name");
+                free(func_handle);
+                return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+        }
 
         next_param = &(func_handle->params);
         va_start(ap, name);
@@ -5029,11 +5360,17 @@ int pevent_register_print_function(struct pevent *pevent,
                         break;
 
                 if (type < 0 || type >= PEVENT_FUNC_ARG_MAX_TYPES) {
-                        warning("Invalid argument type %d", type);
+                        do_warning("Invalid argument type %d", type);
+                        ret = PEVENT_ERRNO__INVALID_ARG_TYPE;
                         goto out_free;
                 }
 
-                param = malloc_or_die(sizeof(*param));
+                param = malloc(sizeof(*param));
+                if (!param) {
+                        do_warning("Failed to allocate function param");
+                        ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
+                        goto out_free;
+                }
                 param->type = type;
                 param->next = NULL;
 
@@ -5051,7 +5388,7 @@ int pevent_register_print_function(struct pevent *pevent,
  out_free:
         va_end(ap);
         free_func_handle(func_handle);
-        return -1;
+        return ret;
 }
 
 /**
@@ -5103,8 +5440,12 @@ int pevent_register_event_handler(struct pevent *pevent,
 
  not_found:
         /* Save for later use. */
-        handle = malloc_or_die(sizeof(*handle));
-        memset(handle, 0, sizeof(*handle));
+        handle = calloc(1, sizeof(*handle));
+        if (!handle) {
+                do_warning("Failed to allocate event handler");
+                return PEVENT_ERRNO__MEM_ALLOC_FAILED;
+        }
+
         handle->id = id;
         if (event_name)
                 handle->event_name = strdup(event_name);
@@ -5113,7 +5454,11 @@ int pevent_register_event_handler(struct pevent *pevent,
 
         if ((event_name && !handle->event_name) ||
             (sys_name && !handle->sys_name)) {
-                die("Failed to allocate event/sys name");
+                do_warning("Failed to allocate event/sys name");
+                free((void *)handle->event_name);
+                free((void *)handle->sys_name);
+                free(handle);
+                return PEVENT_ERRNO__MEM_ALLOC_FAILED;
         }
 
         handle->func = func;
@@ -5129,13 +5474,10 @@ int pevent_register_event_handler(struct pevent *pevent,
  */
 struct pevent *pevent_alloc(void)
 {
-        struct pevent *pevent;
+        struct pevent *pevent = calloc(1, sizeof(*pevent));
 
-        pevent = malloc(sizeof(*pevent));
-        if (!pevent)
-                return NULL;
-        memset(pevent, 0, sizeof(*pevent));
-        pevent->ref_count = 1;
+        if (pevent)
+                pevent->ref_count = 1;
 
         return pevent;
 }
@@ -5164,7 +5506,7 @@ static void free_formats(struct format *format)
         free_format_fields(format->fields);
 }
 
-static void free_event(struct event_format *event)
+void pevent_free_format(struct event_format *event)
 {
         free(event->name);
         free(event->system);
@@ -5250,7 +5592,7 @@ void pevent_free(struct pevent *pevent)
         }
 
         for (i = 0; i < pevent->nr_events; i++)
-                free_event(pevent->events[i]);
+                pevent_free_format(pevent->events[i]);
 
         while (pevent->handlers) {
                 handle = pevent->handlers;
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index 5772ad8cb386..24a4bbabc5d5 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -24,8 +24,8 @@
 #include <stdarg.h>
 #include <regex.h>
 
-#ifndef __unused
-#define __unused __attribute__ ((unused))
+#ifndef __maybe_unused
+#define __maybe_unused __attribute__((unused))
 #endif
 
 /* ----------------------- trace_seq ----------------------- */
@@ -49,7 +49,7 @@ struct pevent_record {
         int                     cpu;
         int                     ref_count;
         int                     locked;         /* Do not free, even if ref_count is zero */
-        void                    *private;
+        void                    *priv;
 #if DEBUG_RECORD
         struct pevent_record    *prev;
         struct pevent_record    *next;
@@ -106,7 +106,7 @@ struct plugin_option {
         char                            *plugin_alias;
         char                            *description;
         char                            *value;
-        void                            *private;
+        void                            *priv;
         int                             set;
 };
 
@@ -345,6 +345,35 @@ enum pevent_flag {
         PEVENT_NSEC_OUTPUT              = 1,    /* output in NSECS */
 };
 
+#define PEVENT_ERRORS                                                         \
+        _PE(MEM_ALLOC_FAILED,   "failed to allocate memory"),                 \
+        _PE(PARSE_EVENT_FAILED, "failed to parse event"),                     \
+        _PE(READ_ID_FAILED,     "failed to read event id"),                   \
+        _PE(READ_FORMAT_FAILED, "failed to read event format"),               \
+        _PE(READ_PRINT_FAILED,  "failed to read event print fmt"),            \
+        _PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
+        _PE(INVALID_ARG_TYPE,   "invalid argument type")
+
+#undef _PE
+#define _PE(__code, __str) PEVENT_ERRNO__ ## __code
+enum pevent_errno {
+        PEVENT_ERRNO__SUCCESS                   = 0,
+
+        /*
+         * Choose an arbitrary negative big number not to clash with standard
+         * errno since SUS requires the errno has distinct positive values.
+         * See 'Issue 6' in the link below.
+         *
+         * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
+         */
+        __PEVENT_ERRNO__START                   = -100000,
+
+        PEVENT_ERRORS,
+
+        __PEVENT_ERRNO__END,
+};
+#undef _PE
+
 struct cmdline;
 struct cmdline_list;
 struct func_map;
@@ -509,8 +538,11 @@ void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
                              int long_size);
 
-int pevent_parse_event(struct pevent *pevent, const char *buf,
-                       unsigned long size, const char *sys);
+enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
+                                     unsigned long size, const char *sys);
+enum pevent_errno pevent_parse_format(struct event_format **eventp, const char *buf,
+                                      unsigned long size, const char *sys);
+void pevent_free_format(struct event_format *event);
 
 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
                            const char *name, struct pevent_record *record,
@@ -561,6 +593,8 @@ int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
 void pevent_event_info(struct trace_seq *s, struct event_format *event,
                        struct pevent_record *record);
+int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
+                    char *buf, size_t buflen);
 
 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type);
 struct format_field **pevent_event_common_fields(struct event_format *event);
diff --git a/tools/lib/traceevent/event-utils.h b/tools/lib/traceevent/event-utils.h
index 08296383d1e6..bc075006966e 100644
--- a/tools/lib/traceevent/event-utils.h
+++ b/tools/lib/traceevent/event-utils.h
@@ -39,6 +39,12 @@ void __vdie(const char *fmt, ...);
 void __vwarning(const char *fmt, ...);
 void __vpr_stat(const char *fmt, ...);
 
+#define min(x, y) ({                            \
+        typeof(x) _min1 = (x);                  \
+        typeof(y) _min2 = (y);                  \
+        (void) (&_min1 == &_min2);              \
+        _min1 < _min2 ? _min1 : _min2; })
+
 static inline char *strim(char *string)
 {
         char *ret;
diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
index 26b823b61aa1..8f8fbc227a46 100644
--- a/tools/perf/.gitignore
+++ b/tools/perf/.gitignore
@@ -21,3 +21,5 @@ config.mak
 config.mak.autogen
 *-bison.*
 *-flex.*
+*.pyc
+*.pyo
diff --git a/tools/perf/Documentation/Makefile b/tools/perf/Documentation/Makefile
index ca600e09c8d4..9f2e44f2b17a 100644
--- a/tools/perf/Documentation/Makefile
+++ b/tools/perf/Documentation/Makefile
@@ -195,10 +195,10 @@ install-pdf: pdf
 #install-html: html
 #       '$(SHELL_PATH_SQ)' ./install-webdoc.sh $(DESTDIR)$(htmldir)
 
-../PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
-        $(QUIET_SUBDIR0)../ $(QUIET_SUBDIR1) PERF-VERSION-FILE
+$(OUTPUT)PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
+        $(QUIET_SUBDIR0)../ $(QUIET_SUBDIR1) $(OUTPUT)PERF-VERSION-FILE
 
--include ../PERF-VERSION-FILE
+-include $(OUTPUT)PERF-VERSION-FILE
 
 #
 # Determine "include::" file references in asciidoc files.
diff --git a/tools/perf/Documentation/jit-interface.txt b/tools/perf/Documentation/jit-interface.txt
new file mode 100644
index 000000000000..a8656f564915
--- /dev/null
+++ b/tools/perf/Documentation/jit-interface.txt
@@ -0,0 +1,15 @@
+perf supports a simple JIT interface to resolve symbols for dynamic code generated
+by a JIT.
+
+The JIT has to write a /tmp/perf-%d.map  (%d = pid of process) file
+
+This is a text file.
+
+Each line has the following format, fields separated with spaces:
+
+START SIZE symbolname
+
+START and SIZE are hex numbers without 0x.
+symbolname is the rest of the line, so it could contain special characters.
+
+The ownership of the file has to match the process.
diff --git a/tools/perf/Documentation/perf-annotate.txt b/tools/perf/Documentation/perf-annotate.txt
index c89f9e1453f7..c8ffd9fd5c6a 100644
--- a/tools/perf/Documentation/perf-annotate.txt
+++ b/tools/perf/Documentation/perf-annotate.txt
@@ -85,6 +85,9 @@ OPTIONS
 -M::
 --disassembler-style=:: Set disassembler style for objdump.
 
+--objdump=<path>::
+        Path to objdump binary.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-report[1]
diff --git a/tools/perf/Documentation/perf-diff.txt b/tools/perf/Documentation/perf-diff.txt
index 74d7481ed7a6..ab7f667de1b1 100644
--- a/tools/perf/Documentation/perf-diff.txt
+++ b/tools/perf/Documentation/perf-diff.txt
@@ -17,6 +17,9 @@ captured via perf record.
 
 If no parameters are passed it will assume perf.data.old and perf.data.
 
+The differential profile is displayed only for events matching both
+specified perf.data files.
+
 OPTIONS
 -------
 -M::
diff --git a/tools/perf/Documentation/perf-kvm.txt b/tools/perf/Documentation/perf-kvm.txt
index dd84cb2f0a88..326f2cb333cb 100644
--- a/tools/perf/Documentation/perf-kvm.txt
+++ b/tools/perf/Documentation/perf-kvm.txt
@@ -12,7 +12,7 @@ SYNOPSIS
         [--guestkallsyms=<path> --guestmodules=<path> | --guestvmlinux=<path>]]
         {top|record|report|diff|buildid-list}
 'perf kvm' [--host] [--guest] [--guestkallsyms=<path> --guestmodules=<path>
-        | --guestvmlinux=<path>] {top|record|report|diff|buildid-list}
+        | --guestvmlinux=<path>] {top|record|report|diff|buildid-list|stat}
 
 DESCRIPTION
 -----------
@@ -38,6 +38,18 @@ There are a couple of variants of perf kvm:
   so that other tools can be used to fetch packages with matching symbol tables
   for use by perf report.
 
+  'perf kvm stat <command>' to run a command and gather performance counter
+  statistics.
+  Especially, perf 'kvm stat record/report' generates a statistical analysis
+  of KVM events. Currently, vmexit, mmio and ioport events are supported.
+  'perf kvm stat record <command>' records kvm events and the events between
+  start and end <command>.
+  And this command produces a file which contains tracing results of kvm
+  events.
+
+  'perf kvm stat report' reports statistical data which includes events
+  handled time, samples, and so on.
+
 OPTIONS
 -------
 -i::
@@ -68,7 +80,21 @@ OPTIONS
 --guestvmlinux=<path>::
         Guest os kernel vmlinux.
 
+STAT REPORT OPTIONS
+-------------------
+--vcpu=<value>::
+       analyze events which occures on this vcpu. (default: all vcpus)
+
+--events=<value>::
+       events to be analyzed. Possible values: vmexit, mmio, ioport.
+       (default: vmexit)
+-k::
+--key=<value>::
+       Sorting key. Possible values: sample (default, sort by samples
+       number), time (sort by average time).
+
 SEE ALSO
 --------
 linkperf:perf-top[1], linkperf:perf-record[1], linkperf:perf-report[1],
-linkperf:perf-diff[1], linkperf:perf-buildid-list[1]
+linkperf:perf-diff[1], linkperf:perf-buildid-list[1],
+linkperf:perf-stat[1]
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt
index ddc22525228d..d1e39dc8c810 100644
--- a/tools/perf/Documentation/perf-list.txt
+++ b/tools/perf/Documentation/perf-list.txt
@@ -15,24 +15,43 @@ DESCRIPTION
 This command displays the symbolic event types which can be selected in the
 various perf commands with the -e option.
 
+[[EVENT_MODIFIERS]]
 EVENT MODIFIERS
 ---------------
 
 Events can optionally have a modifer by appending a colon and one or
-more modifiers.  Modifiers allow the user to restrict when events are
-counted with 'u' for user-space, 'k' for kernel, 'h' for hypervisor.
-Additional modifiers are 'G' for guest counting (in KVM guests) and 'H'
-for host counting (not in KVM guests).
+more modifiers. Modifiers allow the user to restrict the events to be
+counted. The following modifiers exist:
+
+ u - user-space counting
+ k - kernel counting
+ h - hypervisor counting
+ G - guest counting (in KVM guests)
+ H - host counting (not in KVM guests)
+ p - precise level
 
 The 'p' modifier can be used for specifying how precise the instruction
-address should be. The 'p' modifier is currently only implemented for
-Intel PEBS and can be specified multiple times:
-  0 - SAMPLE_IP can have arbitrary skid
-  1 - SAMPLE_IP must have constant skid
-  2 - SAMPLE_IP requested to have 0 skid
-  3 - SAMPLE_IP must have 0 skid
+address should be. The 'p' modifier can be specified multiple times:
+
+ 0 - SAMPLE_IP can have arbitrary skid
+ 1 - SAMPLE_IP must have constant skid
+ 2 - SAMPLE_IP requested to have 0 skid
+ 3 - SAMPLE_IP must have 0 skid
+
+For Intel systems precise event sampling is implemented with PEBS
+which supports up to precise-level 2.
 
-The PEBS implementation now supports up to 2.
+On AMD systems it is implemented using IBS (up to precise-level 2).
+The precise modifier works with event types 0x76 (cpu-cycles, CPU
+clocks not halted) and 0xC1 (micro-ops retired). Both events map to
+IBS execution sampling (IBS op) with the IBS Op Counter Control bit
+(IbsOpCntCtl) set respectively (see AMD64 Architecture Programmer’s
+Manual Volume 2: System Programming, 13.3 Instruction-Based
+Sampling). Examples to use IBS:
+
+ perf record -a -e cpu-cycles:p ...    # use ibs op counting cycles
+ perf record -a -e r076:p ...          # same as -e cpu-cycles:p
+ perf record -a -e r0C1:p ...          # use ibs op counting micro-ops
 
 RAW HARDWARE EVENT DESCRIPTOR
 -----------------------------
@@ -44,6 +63,11 @@ layout of IA32_PERFEVTSELx MSRs (see [Intel® 64 and IA-32 Architectures Softwar
 of IA32_PERFEVTSELx MSRs) or AMD's PerfEvtSeln (see [AMD64 Architecture Programmer’s Manual Volume 2: System Programming], Page 344,
 Figure 13-7 Performance Event-Select Register (PerfEvtSeln)).
 
+Note: Only the following bit fields can be set in x86 counter
+registers: event, umask, edge, inv, cmask. Esp. guest/host only and
+OS/user mode flags must be setup using <<EVENT_MODIFIERS, EVENT
+MODIFIERS>>.
+
 Example:
 
 If the Intel docs for a QM720 Core i7 describe an event as:
@@ -91,4 +115,4 @@ SEE ALSO
 linkperf:perf-stat[1], linkperf:perf-top[1],
 linkperf:perf-record[1],
 http://www.intel.com/Assets/PDF/manual/253669.pdf[Intel® 64 and IA-32 Architectures Software Developer's Manual Volume 3B: System Programming Guide],
-http://support.amd.com/us/Processor_TechDocs/24593.pdf[AMD64 Architecture Programmer’s Manual Volume 2: System Programming]
+http://support.amd.com/us/Processor_TechDocs/24593_APM_v2.pdf[AMD64 Architecture Programmer’s Manual Volume 2: System Programming]
diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 495210a612c4..f4d91bebd59d 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -168,6 +168,9 @@ OPTIONS
         branch stacks and it will automatically switch to the branch view mode,
         unless --no-branch-stack is used.
 
+--objdump=<path>::
+        Path to objdump binary.
+
 SEE ALSO
 --------
 linkperf:perf-stat[1], linkperf:perf-annotate[1]
diff --git a/tools/perf/Documentation/perf-script-perl.txt b/tools/perf/Documentation/perf-script-perl.txt
index 3152cca15501..d00bef231340 100644
--- a/tools/perf/Documentation/perf-script-perl.txt
+++ b/tools/perf/Documentation/perf-script-perl.txt
@@ -116,8 +116,8 @@ search path and 'use'ing a few support modules (see module
 descriptions below):
 
 ----
- use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/perf-script-Util/lib";
- use lib "./perf-script-Util/lib";
+ use lib "$ENV{'PERF_EXEC_PATH'}/scripts/perl/Perf-Trace-Util/lib";
+ use lib "./Perf-Trace-Util/lib";
  use Perf::Trace::Core;
  use Perf::Trace::Context;
  use Perf::Trace::Util;
diff --git a/tools/perf/Documentation/perf-script-python.txt b/tools/perf/Documentation/perf-script-python.txt
index 471022069119..a4027f221a53 100644
--- a/tools/perf/Documentation/perf-script-python.txt
+++ b/tools/perf/Documentation/perf-script-python.txt
@@ -129,7 +129,7 @@ import os
 import sys
 
 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
-        '/scripts/python/perf-script-Util/lib/Perf/Trace')
+        '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
 
 from perf_trace_context import *
 from Core import *
@@ -216,7 +216,7 @@ import os
 import sys
 
 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
-        '/scripts/python/perf-script-Util/lib/Perf/Trace')
+        '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
 
 from perf_trace_context import *
 from Core import *
@@ -279,7 +279,7 @@ import os
 import sys
 
 sys.path.append(os.environ['PERF_EXEC_PATH'] + \
-        '/scripts/python/perf-script-Util/lib/Perf/Trace')
+        '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
 
 from perf_trace_context import *
 from Core import *
@@ -391,7 +391,7 @@ drwxr-xr-x 4 trz trz 4096 2010-01-26 22:30 .
 drwxr-xr-x 4 trz trz 4096 2010-01-26 22:29 ..
 drwxr-xr-x 2 trz trz 4096 2010-01-26 22:29 bin
 -rw-r--r-- 1 trz trz 2548 2010-01-26 22:29 check-perf-script.py
-drwxr-xr-x 3 trz trz 4096 2010-01-26 22:49 perf-script-Util
+drwxr-xr-x 3 trz trz 4096 2010-01-26 22:49 Perf-Trace-Util
 -rw-r--r-- 1 trz trz 1462 2010-01-26 22:30 syscall-counts.py
 ----
 
@@ -518,7 +518,7 @@ descriptions below):
  import sys
 
  sys.path.append(os.environ['PERF_EXEC_PATH'] + \
-              '/scripts/python/perf-script-Util/lib/Perf/Trace')
+              '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
 
  from perf_trace_context import *
  from Core import *
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt
new file mode 100644
index 000000000000..3a2ae37310a9
--- /dev/null
+++ b/tools/perf/Documentation/perf-trace.txt
@@ -0,0 +1,53 @@
+perf-trace(1)
+=============
+
+NAME
+----
+perf-trace - strace inspired tool
+
+SYNOPSIS
+--------
+[verse]
+'perf trace'
+
+DESCRIPTION
+-----------
+This command will show the events associated with the target, initially
+syscalls, but other system events like pagefaults, task lifetime events,
+scheduling events, etc.
+
+Initially this is a live mode only tool, but eventually will work with
+perf.data files like the other tools, allowing a detached 'record' from
+analysis phases.
+
+OPTIONS
+-------
+
+--all-cpus::
+        System-wide collection from all CPUs.
+
+-p::
+--pid=::
+        Record events on existing process ID (comma separated list).
+
+--tid=::
+        Record events on existing thread ID (comma separated list).
+
+--uid=::
+        Record events in threads owned by uid. Name or number.
+
+--no-inherit::
+        Child tasks do not inherit counters.
+
+--mmap-pages=::
+        Number of mmap data pages. Must be a power of two.
+
+--cpu::
+Collect samples only on the list of CPUs provided. Multiple CPUs can be provided as a
+comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2.
+In per-thread mode with inheritance mode on (default), Events are captured only when
+the thread executes on the designated CPUs. Default is to monitor all CPUs.
+
+SEE ALSO
+--------
+linkperf:perf-record[1], linkperf:perf-script[1]
diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST
index b4b572e8c100..80db3f4bcf7a 100644
--- a/tools/perf/MANIFEST
+++ b/tools/perf/MANIFEST
@@ -10,8 +10,12 @@ include/linux/stringify.h
 lib/rbtree.c
 include/linux/swab.h
 arch/*/include/asm/unistd*.h
+arch/*/include/asm/perf_regs.h
 arch/*/lib/memcpy*.S
 arch/*/lib/memset*.S
 include/linux/poison.h
 include/linux/magic.h
 include/linux/hw_breakpoint.h
+arch/x86/include/asm/svm.h
+arch/x86/include/asm/vmx.h
+arch/x86/include/asm/kvm_host.h
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 35655c3a7b7a..e5e71e7d95a0 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -37,7 +37,14 @@ include config/utilities.mak
 #
 # Define NO_NEWT if you do not want TUI support.
 #
+# Define NO_GTK2 if you do not want GTK+ GUI support.
+#
 # Define NO_DEMANGLE if you do not want C++ symbol demangling.
+#
+# Define NO_LIBELF if you do not want libelf dependency (e.g. cross-builds)
+#
+# Define NO_LIBUNWIND if you do not want libunwind dependency for dwarf
+# backtrace post unwind.
 
 $(OUTPUT)PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
         @$(SHELL_PATH) util/PERF-VERSION-GEN $(OUTPUT)
@@ -50,16 +57,19 @@ ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
                                   -e s/s390x/s390/ -e s/parisc64/parisc/ \
                                   -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
                                   -e s/sh[234].*/sh/ )
+NO_PERF_REGS := 1
 
 CC = $(CROSS_COMPILE)gcc
 AR = $(CROSS_COMPILE)ar
 
 # Additional ARCH settings for x86
 ifeq ($(ARCH),i386)
-        ARCH := x86
+        override ARCH := x86
+        NO_PERF_REGS := 0
+        LIBUNWIND_LIBS = -lunwind -lunwind-x86
 endif
 ifeq ($(ARCH),x86_64)
-        ARCH := x86
+        override ARCH := x86
         IS_X86_64 := 0
         ifeq (, $(findstring m32,$(EXTRA_CFLAGS)))
                 IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n 1)
@@ -69,6 +79,8 @@ ifeq ($(ARCH),x86_64)
                 ARCH_CFLAGS := -DARCH_X86_64
                 ARCH_INCLUDE = ../../arch/x86/lib/memcpy_64.S ../../arch/x86/lib/memset_64.S
         endif
+        NO_PERF_REGS := 0
+        LIBUNWIND_LIBS = -lunwind -lunwind-x86_64
 endif
 
 # Treat warnings as errors unless directed not to
@@ -89,7 +101,7 @@ ifdef PARSER_DEBUG
         PARSER_DEBUG_CFLAGS := -DPARSER_DEBUG
 endif
 
-CFLAGS = -fno-omit-frame-pointer -ggdb3 -Wall -Wextra -std=gnu99 $(CFLAGS_WERROR) $(CFLAGS_OPTIMIZE) $(EXTRA_WARNINGS) $(EXTRA_CFLAGS) $(PARSER_DEBUG_CFLAGS)
+CFLAGS = -fno-omit-frame-pointer -ggdb3 -funwind-tables -Wall -Wextra -std=gnu99 $(CFLAGS_WERROR) $(CFLAGS_OPTIMIZE) $(EXTRA_WARNINGS) $(EXTRA_CFLAGS) $(PARSER_DEBUG_CFLAGS)
 EXTLIBS = -lpthread -lrt -lelf -lm
 ALL_CFLAGS = $(CFLAGS) -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
 ALL_LDFLAGS = $(LDFLAGS)
@@ -186,10 +198,10 @@ SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH))
 
 TRACE_EVENT_DIR = ../lib/traceevent/
 
-ifeq ("$(origin O)", "command line")
-        TE_PATH=$(OUTPUT)/
+ifneq ($(OUTPUT),)
+        TE_PATH=$(OUTPUT)
 else
-        TE_PATH=$(TRACE_EVENT_DIR)/
+        TE_PATH=$(TRACE_EVENT_DIR)
 endif
 
 LIBTRACEEVENT = $(TE_PATH)libtraceevent.a
@@ -221,13 +233,13 @@ export PERL_PATH
 FLEX = flex
 BISON= bison
 
-$(OUTPUT)util/parse-events-flex.c: util/parse-events.l
+$(OUTPUT)util/parse-events-flex.c: util/parse-events.l $(OUTPUT)util/parse-events-bison.c
         $(QUIET_FLEX)$(FLEX) --header-file=$(OUTPUT)util/parse-events-flex.h $(PARSER_DEBUG_FLEX) -t util/parse-events.l > $(OUTPUT)util/parse-events-flex.c
 
 $(OUTPUT)util/parse-events-bison.c: util/parse-events.y
         $(QUIET_BISON)$(BISON) -v util/parse-events.y -d $(PARSER_DEBUG_BISON) -o $(OUTPUT)util/parse-events-bison.c
 
-$(OUTPUT)util/pmu-flex.c: util/pmu.l
+$(OUTPUT)util/pmu-flex.c: util/pmu.l $(OUTPUT)util/pmu-bison.c
         $(QUIET_FLEX)$(FLEX) --header-file=$(OUTPUT)util/pmu-flex.h -t util/pmu.l > $(OUTPUT)util/pmu-flex.c
 
 $(OUTPUT)util/pmu-bison.c: util/pmu.y
@@ -252,6 +264,7 @@ LIB_H += util/include/linux/ctype.h
 LIB_H += util/include/linux/kernel.h
 LIB_H += util/include/linux/list.h
 LIB_H += util/include/linux/export.h
+LIB_H += util/include/linux/magic.h
 LIB_H += util/include/linux/poison.h
 LIB_H += util/include/linux/prefetch.h
 LIB_H += util/include/linux/rbtree.h
@@ -321,6 +334,10 @@ LIB_H += $(TRACE_EVENT_DIR)event-parse.h
 LIB_H += util/target.h
 LIB_H += util/rblist.h
 LIB_H += util/intlist.h
+LIB_H += util/perf_regs.h
+LIB_H += util/unwind.h
+LIB_H += ui/helpline.h
+LIB_H += util/vdso.h
 
 LIB_OBJS += $(OUTPUT)util/abspath.o
 LIB_OBJS += $(OUTPUT)util/alias.o
@@ -356,6 +373,7 @@ LIB_OBJS += $(OUTPUT)util/usage.o
 LIB_OBJS += $(OUTPUT)util/wrapper.o
 LIB_OBJS += $(OUTPUT)util/sigchain.o
 LIB_OBJS += $(OUTPUT)util/symbol.o
+LIB_OBJS += $(OUTPUT)util/symbol-elf.o
 LIB_OBJS += $(OUTPUT)util/dso-test-data.o
 LIB_OBJS += $(OUTPUT)util/color.o
 LIB_OBJS += $(OUTPUT)util/pager.o
@@ -387,11 +405,15 @@ LIB_OBJS += $(OUTPUT)util/cgroup.o
 LIB_OBJS += $(OUTPUT)util/target.o
 LIB_OBJS += $(OUTPUT)util/rblist.o
 LIB_OBJS += $(OUTPUT)util/intlist.o
+LIB_OBJS += $(OUTPUT)util/vdso.o
+LIB_OBJS += $(OUTPUT)util/stat.o
 
-BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
+LIB_OBJS += $(OUTPUT)ui/helpline.o
+LIB_OBJS += $(OUTPUT)ui/hist.o
+LIB_OBJS += $(OUTPUT)ui/stdio/hist.o
 
+BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o
 BUILTIN_OBJS += $(OUTPUT)builtin-bench.o
-
 # Benchmark modules
 BUILTIN_OBJS += $(OUTPUT)bench/sched-messaging.o
 BUILTIN_OBJS += $(OUTPUT)bench/sched-pipe.o
@@ -449,34 +471,73 @@ PYRF_OBJS += $(OUTPUT)util/xyarray.o
 -include config.mak.autogen
 -include config.mak
 
-ifndef NO_DWARF
-FLAGS_DWARF=$(ALL_CFLAGS) -ldw -lelf $(ALL_LDFLAGS) $(EXTLIBS)
-ifneq ($(call try-cc,$(SOURCE_DWARF),$(FLAGS_DWARF)),y)
-        msg := $(warning No libdw.h found or old libdw.h found or elfutils is older than 0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev);
+ifdef NO_LIBELF
         NO_DWARF := 1
-endif # Dwarf support
-endif # NO_DWARF
-
--include arch/$(ARCH)/Makefile
-
-ifneq ($(OUTPUT),)
-        BASIC_CFLAGS += -I$(OUTPUT)
-endif
-
+        NO_DEMANGLE := 1
+        NO_LIBUNWIND := 1
+else
 FLAGS_LIBELF=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS)
 ifneq ($(call try-cc,$(SOURCE_LIBELF),$(FLAGS_LIBELF)),y)
         FLAGS_GLIBC=$(ALL_CFLAGS) $(ALL_LDFLAGS)
         ifneq ($(call try-cc,$(SOURCE_GLIBC),$(FLAGS_GLIBC)),y)
                 msg := $(error No gnu/libc-version.h found, please install glibc-dev[el]/glibc-static);
         else
-                msg := $(error No libelf.h/libelf found, please install libelf-dev/elfutils-libelf-devel);
+                NO_LIBELF := 1
+                NO_DWARF := 1
+                NO_DEMANGLE := 1
         endif
 endif
+endif # NO_LIBELF
+
+ifndef NO_LIBUNWIND
+# for linking with debug library, run like:
+# make DEBUG=1 LIBUNWIND_DIR=/opt/libunwind/
+ifdef LIBUNWIND_DIR
+        LIBUNWIND_CFLAGS  := -I$(LIBUNWIND_DIR)/include
+        LIBUNWIND_LDFLAGS := -L$(LIBUNWIND_DIR)/lib
+endif
+
+FLAGS_UNWIND=$(LIBUNWIND_CFLAGS) $(ALL_CFLAGS) $(LIBUNWIND_LDFLAGS) $(ALL_LDFLAGS) $(EXTLIBS) $(LIBUNWIND_LIBS)
+ifneq ($(call try-cc,$(SOURCE_LIBUNWIND),$(FLAGS_UNWIND)),y)
+        msg := $(warning No libunwind found, disabling post unwind support. Please install libunwind-dev[el] >= 0.99);
+        NO_LIBUNWIND := 1
+endif # Libunwind support
+endif # NO_LIBUNWIND
+
+-include arch/$(ARCH)/Makefile
+
+ifneq ($(OUTPUT),)
+        BASIC_CFLAGS += -I$(OUTPUT)
+endif
+
+ifdef NO_LIBELF
+BASIC_CFLAGS += -DNO_LIBELF_SUPPORT
+
+EXTLIBS := $(filter-out -lelf,$(EXTLIBS))
+
+# Remove ELF/DWARF dependent codes
+LIB_OBJS := $(filter-out $(OUTPUT)util/symbol-elf.o,$(LIB_OBJS))
+LIB_OBJS := $(filter-out $(OUTPUT)util/dwarf-aux.o,$(LIB_OBJS))
+LIB_OBJS := $(filter-out $(OUTPUT)util/probe-event.o,$(LIB_OBJS))
+LIB_OBJS := $(filter-out $(OUTPUT)util/probe-finder.o,$(LIB_OBJS))
+
+BUILTIN_OBJS := $(filter-out $(OUTPUT)builtin-probe.o,$(BUILTIN_OBJS))
+
+# Use minimal symbol handling
+LIB_OBJS += $(OUTPUT)util/symbol-minimal.o
+
+else # NO_LIBELF
 
 ifneq ($(call try-cc,$(SOURCE_ELF_MMAP),$(FLAGS_COMMON)),y)
         BASIC_CFLAGS += -DLIBELF_NO_MMAP
 endif
 
+FLAGS_DWARF=$(ALL_CFLAGS) -ldw -lelf $(ALL_LDFLAGS) $(EXTLIBS)
+ifneq ($(call try-cc,$(SOURCE_DWARF),$(FLAGS_DWARF)),y)
+        msg := $(warning No libdw.h found or old libdw.h found or elfutils is older than 0.138, disables dwarf support. Please install new elfutils-devel/libdw-dev);
+        NO_DWARF := 1
+endif # Dwarf support
+
 ifndef NO_DWARF
 ifeq ($(origin PERF_HAVE_DWARF_REGS), undefined)
         msg := $(warning DWARF register mappings have not been defined for architecture $(ARCH), DWARF support disabled);
@@ -487,6 +548,29 @@ else
         LIB_OBJS += $(OUTPUT)util/dwarf-aux.o
 endif # PERF_HAVE_DWARF_REGS
 endif # NO_DWARF
+endif # NO_LIBELF
+
+ifdef NO_LIBUNWIND
+        BASIC_CFLAGS += -DNO_LIBUNWIND_SUPPORT
+else
+        EXTLIBS += $(LIBUNWIND_LIBS)
+        BASIC_CFLAGS := $(LIBUNWIND_CFLAGS) $(BASIC_CFLAGS)
+        BASIC_LDFLAGS := $(LIBUNWIND_LDFLAGS) $(BASIC_LDFLAGS)
+        LIB_OBJS += $(OUTPUT)util/unwind.o
+endif
+
+ifdef NO_LIBAUDIT
+        BASIC_CFLAGS += -DNO_LIBAUDIT_SUPPORT
+else
+        FLAGS_LIBAUDIT = $(ALL_CFLAGS) $(ALL_LDFLAGS) -laudit
+        ifneq ($(call try-cc,$(SOURCE_LIBAUDIT),$(FLAGS_LIBAUDIT)),y)
+                msg := $(warning No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev);
+                BASIC_CFLAGS += -DNO_LIBAUDIT_SUPPORT
+        else
+                BUILTIN_OBJS += $(OUTPUT)builtin-trace.o
+                EXTLIBS += -laudit
+        endif
+endif
 
 ifdef NO_NEWT
         BASIC_CFLAGS += -DNO_NEWT_SUPPORT
@@ -504,14 +588,13 @@ else
                 LIB_OBJS += $(OUTPUT)ui/browsers/annotate.o
                 LIB_OBJS += $(OUTPUT)ui/browsers/hists.o
                 LIB_OBJS += $(OUTPUT)ui/browsers/map.o
-                LIB_OBJS += $(OUTPUT)ui/helpline.o
                 LIB_OBJS += $(OUTPUT)ui/progress.o
                 LIB_OBJS += $(OUTPUT)ui/util.o
                 LIB_OBJS += $(OUTPUT)ui/tui/setup.o
                 LIB_OBJS += $(OUTPUT)ui/tui/util.o
+                LIB_OBJS += $(OUTPUT)ui/tui/helpline.o
                 LIB_H += ui/browser.h
                 LIB_H += ui/browsers/map.h
-                LIB_H += ui/helpline.h
                 LIB_H += ui/keysyms.h
                 LIB_H += ui/libslang.h
                 LIB_H += ui/progress.h
@@ -523,7 +606,7 @@ endif
 ifdef NO_GTK2
         BASIC_CFLAGS += -DNO_GTK2_SUPPORT
 else
-        FLAGS_GTK2=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS) $(shell pkg-config --libs --cflags gtk+-2.0)
+        FLAGS_GTK2=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS) $(shell pkg-config --libs --cflags gtk+-2.0 2>/dev/null)
         ifneq ($(call try-cc,$(SOURCE_GTK2),$(FLAGS_GTK2)),y)
                 msg := $(warning GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev);
                 BASIC_CFLAGS += -DNO_GTK2_SUPPORT
@@ -531,11 +614,12 @@ else
                 ifeq ($(call try-cc,$(SOURCE_GTK2_INFOBAR),$(FLAGS_GTK2)),y)
                         BASIC_CFLAGS += -DHAVE_GTK_INFO_BAR
                 endif
-                BASIC_CFLAGS += $(shell pkg-config --cflags gtk+-2.0)
-                EXTLIBS += $(shell pkg-config --libs gtk+-2.0)
+                BASIC_CFLAGS += $(shell pkg-config --cflags gtk+-2.0 2>/dev/null)
+                EXTLIBS += $(shell pkg-config --libs gtk+-2.0 2>/dev/null)
                 LIB_OBJS += $(OUTPUT)ui/gtk/browser.o
                 LIB_OBJS += $(OUTPUT)ui/gtk/setup.o
                 LIB_OBJS += $(OUTPUT)ui/gtk/util.o
+                LIB_OBJS += $(OUTPUT)ui/gtk/helpline.o
                 # Make sure that it'd be included only once.
                 ifneq ($(findstring -DNO_NEWT_SUPPORT,$(BASIC_CFLAGS)),)
                         LIB_OBJS += $(OUTPUT)ui/setup.o
@@ -644,7 +728,7 @@ else
                 EXTLIBS += -liberty
                 BASIC_CFLAGS += -DHAVE_CPLUS_DEMANGLE
         else
-                FLAGS_BFD=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS) -lbfd
+                FLAGS_BFD=$(ALL_CFLAGS) $(ALL_LDFLAGS) $(EXTLIBS) -DPACKAGE='perf' -lbfd
                 has_bfd := $(call try-cc,$(SOURCE_BFD),$(FLAGS_BFD))
                 ifeq ($(has_bfd),y)
                         EXTLIBS += -lbfd
@@ -674,6 +758,13 @@ else
         endif
 endif
 
+ifeq ($(NO_PERF_REGS),0)
+        ifeq ($(ARCH),x86)
+                LIB_H += arch/x86/include/perf_regs.h
+        endif
+else
+        BASIC_CFLAGS += -DNO_PERF_REGS
+endif
 
 ifdef NO_STRLCPY
         BASIC_CFLAGS += -DNO_STRLCPY
@@ -683,6 +774,14 @@ else
         endif
 endif
 
+ifdef NO_BACKTRACE
+       BASIC_CFLAGS += -DNO_BACKTRACE
+else
+       ifneq ($(call try-cc,$(SOURCE_BACKTRACE),),y)
+               BASIC_CFLAGS += -DNO_BACKTRACE
+       endif
+endif
+
 ifdef ASCIIDOC8
         export ASCIIDOC8
 endif
@@ -700,6 +799,7 @@ perfexecdir_SQ = $(subst ','\'',$(perfexecdir))
 template_dir_SQ = $(subst ','\'',$(template_dir))
 htmldir_SQ = $(subst ','\'',$(htmldir))
 prefix_SQ = $(subst ','\'',$(prefix))
+sysconfdir_SQ = $(subst ','\'',$(sysconfdir))
 
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
 
@@ -767,10 +867,10 @@ $(OUTPUT)perf.o perf.spec \
 # over the general rule for .o
 
 $(OUTPUT)util/%-flex.o: $(OUTPUT)util/%-flex.c $(OUTPUT)PERF-CFLAGS
-        $(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -Iutil/ -w $<
+        $(QUIET_CC)$(CC) -o $@ -c -Iutil/ $(ALL_CFLAGS) -w $<
 
 $(OUTPUT)util/%-bison.o: $(OUTPUT)util/%-bison.c $(OUTPUT)PERF-CFLAGS
-        $(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) -DYYENABLE_NLS=0 -DYYLTYPE_IS_TRIVIAL=0 -Iutil/ -w $<
+        $(QUIET_CC)$(CC) -o $@ -c -Iutil/ $(ALL_CFLAGS) -DYYENABLE_NLS=0 -DYYLTYPE_IS_TRIVIAL=0 -w $<
 
 $(OUTPUT)%.o: %.c $(OUTPUT)PERF-CFLAGS
         $(QUIET_CC)$(CC) -o $@ -c $(ALL_CFLAGS) $<
@@ -842,7 +942,10 @@ $(LIB_FILE): $(LIB_OBJS)
 
 # libtraceevent.a
 $(LIBTRACEEVENT):
-        $(QUIET_SUBDIR0)$(TRACE_EVENT_DIR) $(QUIET_SUBDIR1) $(COMMAND_O) libtraceevent.a
+        $(QUIET_SUBDIR0)$(TRACE_EVENT_DIR) $(QUIET_SUBDIR1) O=$(OUTPUT) libtraceevent.a
+
+$(LIBTRACEEVENT)-clean:
+        $(QUIET_SUBDIR0)$(TRACE_EVENT_DIR) $(QUIET_SUBDIR1) O=$(OUTPUT) clean
 
 help:
         @echo 'Perf make targets:'
@@ -951,6 +1054,8 @@ install: all
         $(INSTALL) scripts/python/Perf-Trace-Util/lib/Perf/Trace/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/Perf-Trace-Util/lib/Perf/Trace'
         $(INSTALL) scripts/python/*.py -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python'
         $(INSTALL) scripts/python/bin/* -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/scripts/python/bin'
+        $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(sysconfdir_SQ)/bash_completion.d'
+        $(INSTALL) bash_completion '$(DESTDIR_SQ)$(sysconfdir_SQ)/bash_completion.d/perf'
 
 install-python_ext:
         $(PYTHON_WORD) util/setup.py --quiet install --root='/$(DESTDIR_SQ)'
@@ -981,7 +1086,7 @@ quick-install-html:
 
 ### Cleaning rules
 
-clean:
+clean: $(LIBTRACEEVENT)-clean
         $(RM) $(LIB_OBJS) $(BUILTIN_OBJS) $(LIB_FILE) $(OUTPUT)perf-archive $(OUTPUT)perf.o $(LANG_BINDINGS)
         $(RM) $(ALL_PROGRAMS) perf
         $(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo $(OUTPUT)common-cmds.h TAGS tags cscope*
diff --git a/tools/perf/arch/x86/Makefile b/tools/perf/arch/x86/Makefile
index 744e629797be..815841c04eb2 100644
--- a/tools/perf/arch/x86/Makefile
+++ b/tools/perf/arch/x86/Makefile
@@ -2,4 +2,7 @@ ifndef NO_DWARF
 PERF_HAVE_DWARF_REGS := 1
 LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/dwarf-regs.o
 endif
+ifndef NO_LIBUNWIND
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind.o
+endif
 LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/header.o
diff --git a/tools/perf/arch/x86/include/perf_regs.h b/tools/perf/arch/x86/include/perf_regs.h
new file mode 100644
index 000000000000..46fc9f15c6b3
--- /dev/null
+++ b/tools/perf/arch/x86/include/perf_regs.h
@@ -0,0 +1,80 @@
+#ifndef ARCH_PERF_REGS_H
+#define ARCH_PERF_REGS_H
+
+#include <stdlib.h>
+#include "../../util/types.h"
+#include "../../../../../arch/x86/include/asm/perf_regs.h"
+
+#ifndef ARCH_X86_64
+#define PERF_REGS_MASK ((1ULL << PERF_REG_X86_32_MAX) - 1)
+#else
+#define REG_NOSUPPORT ((1ULL << PERF_REG_X86_DS) | \
+                       (1ULL << PERF_REG_X86_ES) | \
+                       (1ULL << PERF_REG_X86_FS) | \
+                       (1ULL << PERF_REG_X86_GS))
+#define PERF_REGS_MASK (((1ULL << PERF_REG_X86_64_MAX) - 1) & ~REG_NOSUPPORT)
+#endif
+#define PERF_REG_IP PERF_REG_X86_IP
+#define PERF_REG_SP PERF_REG_X86_SP
+
+static inline const char *perf_reg_name(int id)
+{
+        switch (id) {
+        case PERF_REG_X86_AX:
+                return "AX";
+        case PERF_REG_X86_BX:
+                return "BX";
+        case PERF_REG_X86_CX:
+                return "CX";
+        case PERF_REG_X86_DX:
+                return "DX";
+        case PERF_REG_X86_SI:
+                return "SI";
+        case PERF_REG_X86_DI:
+                return "DI";
+        case PERF_REG_X86_BP:
+                return "BP";
+        case PERF_REG_X86_SP:
+                return "SP";
+        case PERF_REG_X86_IP:
+                return "IP";
+        case PERF_REG_X86_FLAGS:
+                return "FLAGS";
+        case PERF_REG_X86_CS:
+                return "CS";
+        case PERF_REG_X86_SS:
+                return "SS";
+        case PERF_REG_X86_DS:
+                return "DS";
+        case PERF_REG_X86_ES:
+                return "ES";
+        case PERF_REG_X86_FS:
+                return "FS";
+        case PERF_REG_X86_GS:
+                return "GS";
+#ifdef ARCH_X86_64
+        case PERF_REG_X86_R8:
+                return "R8";
+        case PERF_REG_X86_R9:
+                return "R9";
+        case PERF_REG_X86_R10:
+                return "R10";
+        case PERF_REG_X86_R11:
+                return "R11";
+        case PERF_REG_X86_R12:
+                return "R12";
+        case PERF_REG_X86_R13:
+                return "R13";
+        case PERF_REG_X86_R14:
+                return "R14";
+        case PERF_REG_X86_R15:
+                return "R15";
+#endif /* ARCH_X86_64 */
+        default:
+                return NULL;
+        }
+
+        return NULL;
+}
+
+#endif /* ARCH_PERF_REGS_H */
diff --git a/tools/perf/arch/x86/util/unwind.c b/tools/perf/arch/x86/util/unwind.c
new file mode 100644
index 000000000000..78d956eff96f
--- /dev/null
+++ b/tools/perf/arch/x86/util/unwind.c
@@ -0,0 +1,111 @@
+
+#include <errno.h>
+#include <libunwind.h>
+#include "perf_regs.h"
+#include "../../util/unwind.h"
+
+#ifdef ARCH_X86_64
+int unwind__arch_reg_id(int regnum)
+{
+        int id;
+
+        switch (regnum) {
+        case UNW_X86_64_RAX:
+                id = PERF_REG_X86_AX;
+                break;
+        case UNW_X86_64_RDX:
+                id = PERF_REG_X86_DX;
+                break;
+        case UNW_X86_64_RCX:
+                id = PERF_REG_X86_CX;
+                break;
+        case UNW_X86_64_RBX:
+                id = PERF_REG_X86_BX;
+                break;
+        case UNW_X86_64_RSI:
+                id = PERF_REG_X86_SI;
+                break;
+        case UNW_X86_64_RDI:
+                id = PERF_REG_X86_DI;
+                break;
+        case UNW_X86_64_RBP:
+                id = PERF_REG_X86_BP;
+                break;
+        case UNW_X86_64_RSP:
+                id = PERF_REG_X86_SP;
+                break;
+        case UNW_X86_64_R8:
+                id = PERF_REG_X86_R8;
+                break;
+        case UNW_X86_64_R9:
+                id = PERF_REG_X86_R9;
+                break;
+        case UNW_X86_64_R10:
+                id = PERF_REG_X86_R10;
+                break;
+        case UNW_X86_64_R11:
+                id = PERF_REG_X86_R11;
+                break;
+        case UNW_X86_64_R12:
+                id = PERF_REG_X86_R12;
+                break;
+        case UNW_X86_64_R13:
+                id = PERF_REG_X86_R13;
+                break;
+        case UNW_X86_64_R14:
+                id = PERF_REG_X86_R14;
+                break;
+        case UNW_X86_64_R15:
+                id = PERF_REG_X86_R15;
+                break;
+        case UNW_X86_64_RIP:
+                id = PERF_REG_X86_IP;
+                break;
+        default:
+                pr_err("unwind: invalid reg id %d\n", regnum);
+                return -EINVAL;
+        }
+
+        return id;
+}
+#else
+int unwind__arch_reg_id(int regnum)
+{
+        int id;
+
+        switch (regnum) {
+        case UNW_X86_EAX:
+                id = PERF_REG_X86_AX;
+                break;
+        case UNW_X86_EDX:
+                id = PERF_REG_X86_DX;
+                break;
+        case UNW_X86_ECX:
+                id = PERF_REG_X86_CX;
+                break;
+        case UNW_X86_EBX:
+                id = PERF_REG_X86_BX;
+                break;
+        case UNW_X86_ESI:
+                id = PERF_REG_X86_SI;
+                break;
+        case UNW_X86_EDI:
+                id = PERF_REG_X86_DI;
+                break;
+        case UNW_X86_EBP:
+                id = PERF_REG_X86_BP;
+                break;
+        case UNW_X86_ESP:
+                id = PERF_REG_X86_SP;
+                break;
+        case UNW_X86_EIP:
+                id = PERF_REG_X86_IP;
+                break;
+        default:
+                pr_err("unwind: invalid reg id %d\n", regnum);
+                return -EINVAL;
+        }
+
+        return id;
+}
+#endif /* ARCH_X86_64 */
diff --git a/tools/perf/bash_completion b/tools/perf/bash_completion
new file mode 100644
index 000000000000..1958fa539d0f
--- /dev/null
+++ b/tools/perf/bash_completion
@@ -0,0 +1,26 @@
+# perf completion
+
+have perf &&
+_perf()
+{
+        local cur cmd
+
+        COMPREPLY=()
+        _get_comp_words_by_ref cur prev
+
+        cmd=${COMP_WORDS[0]}
+
+        # List perf subcommands
+        if [ $COMP_CWORD -eq 1 ]; then
+                cmds=$($cmd --list-cmds)
+                COMPREPLY=( $( compgen -W '$cmds' -- "$cur" ) )
+        # List possible events for -e option
+        elif [[ $prev == "-e" && "${COMP_WORDS[1]}" == @(record|stat|top) ]]; then
+                cmds=$($cmd list --raw-dump)
+                COMPREPLY=( $( compgen -W '$cmds' -- "$cur" ) )
+        # Fall down to list regular files
+        else
+                _filedir
+        fi
+} &&
+complete -F _perf perf
diff --git a/tools/perf/bench/bench.h b/tools/perf/bench/bench.h
index a09bece6dad2..8f89998eeaf4 100644
--- a/tools/perf/bench/bench.h
+++ b/tools/perf/bench/bench.h
@@ -3,7 +3,8 @@
 
 extern int bench_sched_messaging(int argc, const char **argv, const char *prefix);
 extern int bench_sched_pipe(int argc, const char **argv, const char *prefix);
-extern int bench_mem_memcpy(int argc, const char **argv, const char *prefix __used);
+extern int bench_mem_memcpy(int argc, const char **argv,
+                            const char *prefix __maybe_unused);
 extern int bench_mem_memset(int argc, const char **argv, const char *prefix);
 
 #define BENCH_FORMAT_DEFAULT_STR        "default"
diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
index 02dad5d3359b..93c83e3cb4a7 100644
--- a/tools/perf/bench/mem-memcpy.c
+++ b/tools/perf/bench/mem-memcpy.c
@@ -177,7 +177,7 @@ static double do_memcpy_gettimeofday(memcpy_t fn, size_t len, bool prefault)
         } while (0)
 
 int bench_mem_memcpy(int argc, const char **argv,
-                     const char *prefix __used)
+                     const char *prefix __maybe_unused)
 {
         int i;
         size_t len;
diff --git a/tools/perf/bench/mem-memset.c b/tools/perf/bench/mem-memset.c
index 350cc9557265..c6e4bc523492 100644
--- a/tools/perf/bench/mem-memset.c
+++ b/tools/perf/bench/mem-memset.c
@@ -171,7 +171,7 @@ static double do_memset_gettimeofday(memset_t fn, size_t len, bool prefault)
         } while (0)
 
 int bench_mem_memset(int argc, const char **argv,
-                     const char *prefix __used)
+                     const char *prefix __maybe_unused)
 {
         int i;
         size_t len;
diff --git a/tools/perf/bench/sched-messaging.c b/tools/perf/bench/sched-messaging.c
index d1d1b30f99c1..cc1190a0849b 100644
--- a/tools/perf/bench/sched-messaging.c
+++ b/tools/perf/bench/sched-messaging.c
@@ -267,7 +267,7 @@ static const char * const bench_sched_message_usage[] = {
 };
 
 int bench_sched_messaging(int argc, const char **argv,
-                    const char *prefix __used)
+                    const char *prefix __maybe_unused)
 {
         unsigned int i, total_children;
         struct timeval start, stop, diff;
diff --git a/tools/perf/bench/sched-pipe.c b/tools/perf/bench/sched-pipe.c
index 0c7454f8b8a9..69cfba8d4c6c 100644
--- a/tools/perf/bench/sched-pipe.c
+++ b/tools/perf/bench/sched-pipe.c
@@ -43,7 +43,7 @@ static const char * const bench_sched_pipe_usage[] = {
 };
 
 int bench_sched_pipe(int argc, const char **argv,
-                     const char *prefix __used)
+                     const char *prefix __maybe_unused)
 {
         int pipe_1[2], pipe_2[2];
         int m = 0, i;
@@ -55,14 +55,14 @@ int bench_sched_pipe(int argc, const char **argv,
          * discarding returned value of read(), write()
          * causes error in building environment for perf
          */
-        int __used ret, wait_stat;
-        pid_t pid, retpid;
+        int __maybe_unused ret, wait_stat;
+        pid_t pid, retpid __maybe_unused;
 
         argc = parse_options(argc, argv, options,
                              bench_sched_pipe_usage, 0);
 
-        assert(!pipe(pipe_1));
-        assert(!pipe(pipe_2));
+        BUG_ON(pipe(pipe_1));
+        BUG_ON(pipe(pipe_2));
 
         pid = fork();
         assert(pid >= 0);
diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
index 67522cf87405..9ea38540b873 100644
--- a/tools/perf/builtin-annotate.c
+++ b/tools/perf/builtin-annotate.c
@@ -239,7 +239,7 @@ static const char * const annotate_usage[] = {
         NULL
 };
 
-int cmd_annotate(int argc, const char **argv, const char *prefix __used)
+int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         struct perf_annotate annotate = {
                 .tool = {
@@ -282,6 +282,8 @@ int cmd_annotate(int argc, const char **argv, const char *prefix __used)
                     "Display raw encoding of assembly instructions (default)"),
         OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
+        OPT_STRING(0, "objdump", &objdump_path, "path",
+                   "objdump binary to use for disassembly and annotations"),
         OPT_END()
         };
 
diff --git a/tools/perf/builtin-bench.c b/tools/perf/builtin-bench.c
index 1f3100216448..cae9a5fd2ecf 100644
--- a/tools/perf/builtin-bench.c
+++ b/tools/perf/builtin-bench.c
@@ -173,7 +173,7 @@ static void all_subsystem(void)
                 all_suite(&subsystems[i]);
 }
 
-int cmd_bench(int argc, const char **argv, const char *prefix __used)
+int cmd_bench(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         int i, j, status = 0;
 
diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index 29ad20e67919..83654557e108 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -43,15 +43,16 @@ static int build_id_cache__add_file(const char *filename, const char *debugdir)
         }
 
         build_id__sprintf(build_id, sizeof(build_id), sbuild_id);
-        err = build_id_cache__add_s(sbuild_id, debugdir, filename, false);
+        err = build_id_cache__add_s(sbuild_id, debugdir, filename,
+                                    false, false);
         if (verbose)
                 pr_info("Adding %s %s: %s\n", sbuild_id, filename,
                         err ? "FAIL" : "Ok");
         return err;
 }
 
-static int build_id_cache__remove_file(const char *filename __used,
-                                       const char *debugdir __used)
+static int build_id_cache__remove_file(const char *filename __maybe_unused,
+                                       const char *debugdir __maybe_unused)
 {
         u8 build_id[BUILD_ID_SIZE];
         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
@@ -119,7 +120,8 @@ static int __cmd_buildid_cache(void)
         return 0;
 }
 
-int cmd_buildid_cache(int argc, const char **argv, const char *prefix __used)
+int cmd_buildid_cache(int argc, const char **argv,
+                      const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, buildid_cache_options,
                              buildid_cache_usage, 0);
diff --git a/tools/perf/builtin-buildid-list.c b/tools/perf/builtin-buildid-list.c
index 6b2bcfbde150..1159feeebb19 100644
--- a/tools/perf/builtin-buildid-list.c
+++ b/tools/perf/builtin-buildid-list.c
@@ -16,8 +16,6 @@
 #include "util/session.h"
 #include "util/symbol.h"
 
-#include <libelf.h>
-
 static const char *input_name;
 static bool force;
 static bool show_kernel;
@@ -71,7 +69,7 @@ static int perf_session__list_build_ids(void)
 {
         struct perf_session *session;
 
-        elf_version(EV_CURRENT);
+        symbol__elf_init();
 
         session = perf_session__new(input_name, O_RDONLY, force, false,
                                     &build_id__mark_dso_hit_ops);
@@ -105,7 +103,8 @@ static int __cmd_buildid_list(void)
         return perf_session__list_build_ids();
 }
 
-int cmd_buildid_list(int argc, const char **argv, const char *prefix __used)
+int cmd_buildid_list(int argc, const char **argv,
+                     const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, options, buildid_list_usage, 0);
         setup_pager();
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index d29d350fb2b7..761f4197a9e2 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -10,6 +10,7 @@
 #include "util/event.h"
 #include "util/hist.h"
 #include "util/evsel.h"
+#include "util/evlist.h"
 #include "util/session.h"
 #include "util/tool.h"
 #include "util/sort.h"
@@ -24,11 +25,6 @@ static char	  diff__default_sort_order[] = "dso,symbol";
 static bool  force;
 static bool show_displacement;
 
-struct perf_diff {
-        struct perf_tool tool;
-        struct perf_session *session;
-};
-
 static int hists__add_entry(struct hists *self,
                             struct addr_location *al, u64 period)
 {
@@ -37,14 +33,12 @@ static int hists__add_entry(struct hists *self,
         return -ENOMEM;
 }
 
-static int diff__process_sample_event(struct perf_tool *tool,
+static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
                                       union perf_event *event,
                                       struct perf_sample *sample,
-                                      struct perf_evsel *evsel __used,
+                                      struct perf_evsel *evsel,
                                       struct machine *machine)
 {
-        struct perf_diff *_diff = container_of(tool, struct perf_diff, tool);
-        struct perf_session *session = _diff->session;
         struct addr_location al;
 
         if (perf_event__preprocess_sample(event, machine, &al, sample, NULL) < 0) {
@@ -56,26 +50,24 @@ static int diff__process_sample_event(struct perf_tool *tool,
         if (al.filtered || al.sym == NULL)
                 return 0;
 
-        if (hists__add_entry(&session->hists, &al, sample->period)) {
+        if (hists__add_entry(&evsel->hists, &al, sample->period)) {
                 pr_warning("problem incrementing symbol period, skipping event\n");
                 return -1;
         }
 
-        session->hists.stats.total_period += sample->period;
+        evsel->hists.stats.total_period += sample->period;
         return 0;
 }
 
-static struct perf_diff diff = {
-        .tool = {
-                .sample = diff__process_sample_event,
-                .mmap   = perf_event__process_mmap,
-                .comm   = perf_event__process_comm,
-                .exit   = perf_event__process_task,
-                .fork   = perf_event__process_task,
-                .lost   = perf_event__process_lost,
-                .ordered_samples = true,
-                .ordering_requires_timestamps = true,
-        },
+static struct perf_tool tool = {
+        .sample = diff__process_sample_event,
+        .mmap   = perf_event__process_mmap,
+        .comm   = perf_event__process_comm,
+        .exit   = perf_event__process_task,
+        .fork   = perf_event__process_task,
+        .lost   = perf_event__process_lost,
+        .ordered_samples = true,
+        .ordering_requires_timestamps = true,
 };
 
 static void perf_session__insert_hist_entry_by_name(struct rb_root *root,
@@ -146,34 +138,71 @@ static void hists__match(struct hists *older, struct hists *newer)
         }
 }
 
+static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
+                                      struct perf_evlist *evlist)
+{
+        struct perf_evsel *e;
+
+        list_for_each_entry(e, &evlist->entries, node)
+                if (perf_evsel__match2(evsel, e))
+                        return e;
+
+        return NULL;
+}
+
 static int __cmd_diff(void)
 {
         int ret, i;
 #define older (session[0])
 #define newer (session[1])
         struct perf_session *session[2];
+        struct perf_evlist *evlist_new, *evlist_old;
+        struct perf_evsel *evsel;
+        bool first = true;
 
         older = perf_session__new(input_old, O_RDONLY, force, false,
-                                  &diff.tool);
+                                  &tool);
         newer = perf_session__new(input_new, O_RDONLY, force, false,
-                                  &diff.tool);
+                                  &tool);
         if (session[0] == NULL || session[1] == NULL)
                 return -ENOMEM;
 
         for (i = 0; i < 2; ++i) {
-                diff.session = session[i];
-                ret = perf_session__process_events(session[i], &diff.tool);
+                ret = perf_session__process_events(session[i], &tool);
                 if (ret)
                         goto out_delete;
-                hists__output_resort(&session[i]->hists);
         }
 
-        if (show_displacement)
-                hists__resort_entries(&older->hists);
+        evlist_old = older->evlist;
+        evlist_new = newer->evlist;
+
+        list_for_each_entry(evsel, &evlist_new->entries, node)
+                hists__output_resort(&evsel->hists);
+
+        list_for_each_entry(evsel, &evlist_old->entries, node) {
+                hists__output_resort(&evsel->hists);
+
+                if (show_displacement)
+                        hists__resort_entries(&evsel->hists);
+        }
+
+        list_for_each_entry(evsel, &evlist_new->entries, node) {
+                struct perf_evsel *evsel_old;
+
+                evsel_old = evsel_match(evsel, evlist_old);
+                if (!evsel_old)
+                        continue;
+
+                fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
+                        perf_evsel__name(evsel));
+
+                first = false;
+
+                hists__match(&evsel_old->hists, &evsel->hists);
+                hists__fprintf(&evsel->hists, &evsel_old->hists,
+                               show_displacement, true, 0, 0, stdout);
+        }
 
-        hists__match(&older->hists, &newer->hists);
-        hists__fprintf(&newer->hists, &older->hists,
-                       show_displacement, true, 0, 0, stdout);
 out_delete:
         for (i = 0; i < 2; ++i)
                 perf_session__delete(session[i]);
@@ -213,7 +242,7 @@ static const struct option options[] = {
         OPT_END()
 };
 
-int cmd_diff(int argc, const char **argv, const char *prefix __used)
+int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         sort_order = diff__default_sort_order;
         argc = parse_options(argc, argv, options, diff_usage, 0);
@@ -235,6 +264,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix __used)
         if (symbol__init() < 0)
                 return -1;
 
+        perf_hpp__init(true, show_displacement);
         setup_sorting(diff_usage, options);
         setup_pager();
 
diff --git a/tools/perf/builtin-evlist.c b/tools/perf/builtin-evlist.c
index 0dd5a058f766..1fb164164fd0 100644
--- a/tools/perf/builtin-evlist.c
+++ b/tools/perf/builtin-evlist.c
@@ -113,7 +113,7 @@ static const char * const evlist_usage[] = {
         NULL
 };
 
-int cmd_evlist(int argc, const char **argv, const char *prefix __used)
+int cmd_evlist(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         struct perf_attr_details details = { .verbose = false, };
         const char *input_name = NULL;
diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
index 6d5a8a7faf48..25c8b942ff85 100644
--- a/tools/perf/builtin-help.c
+++ b/tools/perf/builtin-help.c
@@ -24,13 +24,14 @@ static struct man_viewer_info_list {
 } *man_viewer_info_list;
 
 enum help_format {
+        HELP_FORMAT_NONE,
         HELP_FORMAT_MAN,
         HELP_FORMAT_INFO,
         HELP_FORMAT_WEB,
 };
 
 static bool show_all = false;
-static enum help_format help_format = HELP_FORMAT_MAN;
+static enum help_format help_format = HELP_FORMAT_NONE;
 static struct option builtin_help_options[] = {
         OPT_BOOLEAN('a', "all", &show_all, "print all available commands"),
         OPT_SET_UINT('m', "man", &help_format, "show man page", HELP_FORMAT_MAN),
@@ -54,7 +55,9 @@ static enum help_format parse_help_format(const char *format)
                 return HELP_FORMAT_INFO;
         if (!strcmp(format, "web") || !strcmp(format, "html"))
                 return HELP_FORMAT_WEB;
-        die("unrecognized help format '%s'", format);
+
+        pr_err("unrecognized help format '%s'", format);
+        return HELP_FORMAT_NONE;
 }
 
 static const char *get_man_viewer_info(const char *name)
@@ -259,6 +262,8 @@ static int perf_help_config(const char *var, const char *value, void *cb)
                 if (!value)
                         return config_error_nonbool(var);
                 help_format = parse_help_format(value);
+                if (help_format == HELP_FORMAT_NONE)
+                        return -1;
                 return 0;
         }
         if (!strcmp(var, "man.viewer")) {
@@ -352,7 +357,7 @@ static void exec_viewer(const char *name, const char *page)
                 warning("'%s': unknown man viewer.", name);
 }
 
-static void show_man_page(const char *perf_cmd)
+static int show_man_page(const char *perf_cmd)
 {
         struct man_viewer_list *viewer;
         const char *page = cmd_to_page(perf_cmd);
@@ -365,28 +370,35 @@ static void show_man_page(const char *perf_cmd)
         if (fallback)
                 exec_viewer(fallback, page);
         exec_viewer("man", page);
-        die("no man viewer handled the request");
+
+        pr_err("no man viewer handled the request");
+        return -1;
 }
 
-static void show_info_page(const char *perf_cmd)
+static int show_info_page(const char *perf_cmd)
 {
         const char *page = cmd_to_page(perf_cmd);
         setenv("INFOPATH", system_path(PERF_INFO_PATH), 1);
         execlp("info", "info", "perfman", page, NULL);
+        return -1;
 }
 
-static void get_html_page_path(struct strbuf *page_path, const char *page)
+static int get_html_page_path(struct strbuf *page_path, const char *page)
 {
         struct stat st;
         const char *html_path = system_path(PERF_HTML_PATH);
 
         /* Check that we have a perf documentation directory. */
         if (stat(mkpath("%s/perf.html", html_path), &st)
-            || !S_ISREG(st.st_mode))
-                die("'%s': not a documentation directory.", html_path);
+            || !S_ISREG(st.st_mode)) {
+                pr_err("'%s': not a documentation directory.", html_path);
+                return -1;
+        }
 
         strbuf_init(page_path, 0);
         strbuf_addf(page_path, "%s/%s.html", html_path, page);
+
+        return 0;
 }
 
 /*
@@ -401,19 +413,23 @@ static void open_html(const char *path)
 }
 #endif
 
-static void show_html_page(const char *perf_cmd)
+static int show_html_page(const char *perf_cmd)
 {
         const char *page = cmd_to_page(perf_cmd);
         struct strbuf page_path; /* it leaks but we exec bellow */
 
-        get_html_page_path(&page_path, page);
+        if (get_html_page_path(&page_path, page) != 0)
+                return -1;
 
         open_html(page_path.buf);
+
+        return 0;
 }
 
-int cmd_help(int argc, const char **argv, const char *prefix __used)
+int cmd_help(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         const char *alias;
+        int rc = 0;
 
         load_command_list("perf-", &main_cmds, &other_cmds);
 
@@ -444,16 +460,20 @@ int cmd_help(int argc, const char **argv, const char *prefix __used)
 
         switch (help_format) {
         case HELP_FORMAT_MAN:
-                show_man_page(argv[0]);
+                rc = show_man_page(argv[0]);
                 break;
         case HELP_FORMAT_INFO:
-                show_info_page(argv[0]);
+                rc = show_info_page(argv[0]);
                 break;
         case HELP_FORMAT_WEB:
-                show_html_page(argv[0]);
+                rc = show_html_page(argv[0]);
+                break;
+        case HELP_FORMAT_NONE:
+                /* fall-through */
         default:
+                rc = -1;
                 break;
         }
 
-        return 0;
+        return rc;
 }
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 3beab489afc5..1eaa6617c814 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -17,9 +17,9 @@
 static char             const *input_name = "-";
 static bool             inject_build_ids;
 
-static int perf_event__repipe_synth(struct perf_tool *tool __used,
+static int perf_event__repipe_synth(struct perf_tool *tool __maybe_unused,
                                     union perf_event *event,
-                                    struct machine *machine __used)
+                                    struct machine *machine __maybe_unused)
 {
         uint32_t size;
         void *buf = event;
@@ -40,7 +40,8 @@ static int perf_event__repipe_synth(struct perf_tool *tool __used,
 
 static int perf_event__repipe_op2_synth(struct perf_tool *tool,
                                         union perf_event *event,
-                                        struct perf_session *session __used)
+                                        struct perf_session *session
+                                        __maybe_unused)
 {
         return perf_event__repipe_synth(tool, event, NULL);
 }
@@ -52,13 +53,14 @@ static int perf_event__repipe_event_type_synth(struct perf_tool *tool,
 }
 
 static int perf_event__repipe_tracing_data_synth(union perf_event *event,
-                                                 struct perf_session *session __used)
+                                                 struct perf_session *session
+                                                 __maybe_unused)
 {
         return perf_event__repipe_synth(NULL, event, NULL);
 }
 
 static int perf_event__repipe_attr(union perf_event *event,
-                                   struct perf_evlist **pevlist __used)
+                                   struct perf_evlist **pevlist __maybe_unused)
 {
         int ret;
         ret = perf_event__process_attr(event, pevlist);
@@ -70,7 +72,7 @@ static int perf_event__repipe_attr(union perf_event *event,
 
 static int perf_event__repipe(struct perf_tool *tool,
                               union perf_event *event,
-                              struct perf_sample *sample __used,
+                              struct perf_sample *sample __maybe_unused,
                               struct machine *machine)
 {
         return perf_event__repipe_synth(tool, event, machine);
@@ -78,8 +80,8 @@ static int perf_event__repipe(struct perf_tool *tool,
 
 static int perf_event__repipe_sample(struct perf_tool *tool,
                                      union perf_event *event,
-                              struct perf_sample *sample __used,
-                              struct perf_evsel *evsel __used,
+                              struct perf_sample *sample __maybe_unused,
+                              struct perf_evsel *evsel __maybe_unused,
                               struct machine *machine)
 {
         return perf_event__repipe_synth(tool, event, machine);
@@ -163,7 +165,7 @@ static int dso__inject_build_id(struct dso *self, struct perf_tool *tool,
 static int perf_event__inject_buildid(struct perf_tool *tool,
                                       union perf_event *event,
                                       struct perf_sample *sample,
-                                      struct perf_evsel *evsel __used,
+                                      struct perf_evsel *evsel __maybe_unused,
                                       struct machine *machine)
 {
         struct addr_location al;
@@ -191,10 +193,13 @@ static int perf_event__inject_buildid(struct perf_tool *tool,
                                  * If this fails, too bad, let the other side
                                  * account this as unresolved.
                                  */
-                        } else
+                        } else {
+#ifndef NO_LIBELF_SUPPORT
                                 pr_warning("no symbols found in %s, maybe "
                                            "install a debug package?\n",
                                            al.map->dso->long_name);
+#endif
+                        }
                 }
         }
 
@@ -221,7 +226,7 @@ struct perf_tool perf_inject = {
 
 extern volatile int session_done;
 
-static void sig_handler(int sig __attribute__((__unused__)))
+static void sig_handler(int sig __maybe_unused)
 {
         session_done = 1;
 }
@@ -264,7 +269,7 @@ static const struct option options[] = {
         OPT_END()
 };
 
-int cmd_inject(int argc, const char **argv, const char *prefix __used)
+int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, options, report_usage, 0);
 
diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
index ce35015f2dc6..bc912c68f49a 100644
--- a/tools/perf/builtin-kmem.c
+++ b/tools/perf/builtin-kmem.c
@@ -1,6 +1,8 @@
 #include "builtin.h"
 #include "perf.h"
 
+#include "util/evlist.h"
+#include "util/evsel.h"
 #include "util/util.h"
 #include "util/cache.h"
 #include "util/symbol.h"
@@ -57,46 +59,52 @@ static unsigned long nr_allocs, nr_cross_allocs;
 
 #define PATH_SYS_NODE   "/sys/devices/system/node"
 
-struct perf_kmem {
-        struct perf_tool    tool;
-        struct perf_session *session;
-};
-
-static void init_cpunode_map(void)
+static int init_cpunode_map(void)
 {
         FILE *fp;
-        int i;
+        int i, err = -1;
 
         fp = fopen("/sys/devices/system/cpu/kernel_max", "r");
         if (!fp) {
                 max_cpu_num = 4096;
-                return;
+                return 0;
+        }
+
+        if (fscanf(fp, "%d", &max_cpu_num) < 1) {
+                pr_err("Failed to read 'kernel_max' from sysfs");
+                goto out_close;
         }
 
-        if (fscanf(fp, "%d", &max_cpu_num) < 1)
-                die("Failed to read 'kernel_max' from sysfs");
         max_cpu_num++;
 
         cpunode_map = calloc(max_cpu_num, sizeof(int));
-        if (!cpunode_map)
-                die("calloc");
+        if (!cpunode_map) {
+                pr_err("%s: calloc failed\n", __func__);
+                goto out_close;
+        }
+
         for (i = 0; i < max_cpu_num; i++)
                 cpunode_map[i] = -1;
+
+        err = 0;
+out_close:
         fclose(fp);
+        return err;
 }
 
-static void setup_cpunode_map(void)
+static int setup_cpunode_map(void)
 {
         struct dirent *dent1, *dent2;
         DIR *dir1, *dir2;
         unsigned int cpu, mem;
         char buf[PATH_MAX];
 
-        init_cpunode_map();
+        if (init_cpunode_map())
+                return -1;
 
         dir1 = opendir(PATH_SYS_NODE);
         if (!dir1)
-                return;
+                return -1;
 
         while ((dent1 = readdir(dir1)) != NULL) {
                 if (dent1->d_type != DT_DIR ||
@@ -116,10 +124,11 @@ static void setup_cpunode_map(void)
                 closedir(dir2);
         }
         closedir(dir1);
+        return 0;
 }
 
-static void insert_alloc_stat(unsigned long call_site, unsigned long ptr,
-                              int bytes_req, int bytes_alloc, int cpu)
+static int insert_alloc_stat(unsigned long call_site, unsigned long ptr,
+                             int bytes_req, int bytes_alloc, int cpu)
 {
         struct rb_node **node = &root_alloc_stat.rb_node;
         struct rb_node *parent = NULL;
@@ -143,8 +152,10 @@ static void insert_alloc_stat(unsigned long call_site, unsigned long ptr,
                 data->bytes_alloc += bytes_alloc;
         } else {
                 data = malloc(sizeof(*data));
-                if (!data)
-                        die("malloc");
+                if (!data) {
+                        pr_err("%s: malloc failed\n", __func__);
+                        return -1;
+                }
                 data->ptr = ptr;
                 data->pingpong = 0;
                 data->hit = 1;
@@ -156,9 +167,10 @@ static void insert_alloc_stat(unsigned long call_site, unsigned long ptr,
         }
         data->call_site = call_site;
         data->alloc_cpu = cpu;
+        return 0;
 }
 
-static void insert_caller_stat(unsigned long call_site,
+static int insert_caller_stat(unsigned long call_site,
                               int bytes_req, int bytes_alloc)
 {
         struct rb_node **node = &root_caller_stat.rb_node;
@@ -183,8 +195,10 @@ static void insert_caller_stat(unsigned long call_site,
                 data->bytes_alloc += bytes_alloc;
         } else {
                 data = malloc(sizeof(*data));
-                if (!data)
-                        die("malloc");
+                if (!data) {
+                        pr_err("%s: malloc failed\n", __func__);
+                        return -1;
+                }
                 data->call_site = call_site;
                 data->pingpong = 0;
                 data->hit = 1;
@@ -194,39 +208,43 @@ static void insert_caller_stat(unsigned long call_site,
                 rb_link_node(&data->node, parent, node);
                 rb_insert_color(&data->node, &root_caller_stat);
         }
+
+        return 0;
 }
 
-static void process_alloc_event(void *data,
-                                struct event_format *event,
-                                int cpu,
-                                u64 timestamp __used,
-                                struct thread *thread __used,
-                                int node)
+static int perf_evsel__process_alloc_event(struct perf_evsel *evsel,
+                                           struct perf_sample *sample)
 {
-        unsigned long call_site;
-        unsigned long ptr;
-        int bytes_req;
-        int bytes_alloc;
-        int node1, node2;
-
-        ptr = raw_field_value(event, "ptr", data);
-        call_site = raw_field_value(event, "call_site", data);
-        bytes_req = raw_field_value(event, "bytes_req", data);
-        bytes_alloc = raw_field_value(event, "bytes_alloc", data);
+        unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr"),
+                      call_site = perf_evsel__intval(evsel, sample, "call_site");
+        int bytes_req = perf_evsel__intval(evsel, sample, "bytes_req"),
+            bytes_alloc = perf_evsel__intval(evsel, sample, "bytes_alloc");
 
-        insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, cpu);
-        insert_caller_stat(call_site, bytes_req, bytes_alloc);
+        if (insert_alloc_stat(call_site, ptr, bytes_req, bytes_alloc, sample->cpu) ||
+            insert_caller_stat(call_site, bytes_req, bytes_alloc))
+                return -1;
 
         total_requested += bytes_req;
         total_allocated += bytes_alloc;
 
-        if (node) {
-                node1 = cpunode_map[cpu];
-                node2 = raw_field_value(event, "node", data);
+        nr_allocs++;
+        return 0;
+}
+
+static int perf_evsel__process_alloc_node_event(struct perf_evsel *evsel,
+                                                struct perf_sample *sample)
+{
+        int ret = perf_evsel__process_alloc_event(evsel, sample);
+
+        if (!ret) {
+                int node1 = cpunode_map[sample->cpu],
+                    node2 = perf_evsel__intval(evsel, sample, "node");
+
                 if (node1 != node2)
                         nr_cross_allocs++;
         }
-        nr_allocs++;
+
+        return ret;
 }
 
 static int ptr_cmp(struct alloc_stat *, struct alloc_stat *);
@@ -257,66 +275,37 @@ static struct alloc_stat *search_alloc_stat(unsigned long ptr,
         return NULL;
 }
 
-static void process_free_event(void *data,
-                               struct event_format *event,
-                               int cpu,
-                               u64 timestamp __used,
-                               struct thread *thread __used)
+static int perf_evsel__process_free_event(struct perf_evsel *evsel,
+                                          struct perf_sample *sample)
 {
-        unsigned long ptr;
+        unsigned long ptr = perf_evsel__intval(evsel, sample, "ptr");
         struct alloc_stat *s_alloc, *s_caller;
 
-        ptr = raw_field_value(event, "ptr", data);
-
         s_alloc = search_alloc_stat(ptr, 0, &root_alloc_stat, ptr_cmp);
         if (!s_alloc)
-                return;
+                return 0;
 
-        if (cpu != s_alloc->alloc_cpu) {
+        if ((short)sample->cpu != s_alloc->alloc_cpu) {
                 s_alloc->pingpong++;
 
                 s_caller = search_alloc_stat(0, s_alloc->call_site,
                                              &root_caller_stat, callsite_cmp);
-                assert(s_caller);
+                if (!s_caller)
+                        return -1;
                 s_caller->pingpong++;
         }
         s_alloc->alloc_cpu = -1;
-}
 
-static void process_raw_event(struct perf_tool *tool,
-                              union perf_event *raw_event __used, void *data,
-                              int cpu, u64 timestamp, struct thread *thread)
-{
-        struct perf_kmem *kmem = container_of(tool, struct perf_kmem, tool);
-        struct event_format *event;
-        int type;
-
-        type = trace_parse_common_type(kmem->session->pevent, data);
-        event = pevent_find_event(kmem->session->pevent, type);
-
-        if (!strcmp(event->name, "kmalloc") ||
-            !strcmp(event->name, "kmem_cache_alloc")) {
-                process_alloc_event(data, event, cpu, timestamp, thread, 0);
-                return;
-        }
-
-        if (!strcmp(event->name, "kmalloc_node") ||
-            !strcmp(event->name, "kmem_cache_alloc_node")) {
-                process_alloc_event(data, event, cpu, timestamp, thread, 1);
-                return;
-        }
-
-        if (!strcmp(event->name, "kfree") ||
-            !strcmp(event->name, "kmem_cache_free")) {
-                process_free_event(data, event, cpu, timestamp, thread);
-                return;
-        }
+        return 0;
 }
 
-static int process_sample_event(struct perf_tool *tool,
+typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
+                                  struct perf_sample *sample);
+
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
                                 union perf_event *event,
                                 struct perf_sample *sample,
-                                struct perf_evsel *evsel __used,
+                                struct perf_evsel *evsel,
                                 struct machine *machine)
 {
         struct thread *thread = machine__findnew_thread(machine, event->ip.pid);
@@ -329,18 +318,18 @@ static int process_sample_event(struct perf_tool *tool,
 
         dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
 
-        process_raw_event(tool, event, sample->raw_data, sample->cpu,
-                          sample->time, thread);
+        if (evsel->handler.func != NULL) {
+                tracepoint_handler f = evsel->handler.func;
+                return f(evsel, sample);
+        }
 
         return 0;
 }
 
-static struct perf_kmem perf_kmem = {
-        .tool = {
-                .sample                 = process_sample_event,
-                .comm                   = perf_event__process_comm,
-                .ordered_samples        = true,
-        },
+static struct perf_tool perf_kmem = {
+        .sample          = process_sample_event,
+        .comm            = perf_event__process_comm,
+        .ordered_samples = true,
 };
 
 static double fragmentation(unsigned long n_req, unsigned long n_alloc)
@@ -496,22 +485,32 @@ static int __cmd_kmem(void)
 {
         int err = -EINVAL;
         struct perf_session *session;
-
-        session = perf_session__new(input_name, O_RDONLY, 0, false,
-                                    &perf_kmem.tool);
+        const struct perf_evsel_str_handler kmem_tracepoints[] = {
+                { "kmem:kmalloc",               perf_evsel__process_alloc_event, },
+                { "kmem:kmem_cache_alloc",      perf_evsel__process_alloc_event, },
+                { "kmem:kmalloc_node",          perf_evsel__process_alloc_node_event, },
+                { "kmem:kmem_cache_alloc_node", perf_evsel__process_alloc_node_event, },
+                { "kmem:kfree",                 perf_evsel__process_free_event, },
+                { "kmem:kmem_cache_free",       perf_evsel__process_free_event, },
+        };
+
+        session = perf_session__new(input_name, O_RDONLY, 0, false, &perf_kmem);
         if (session == NULL)
                 return -ENOMEM;
 
-        perf_kmem.session = session;
-
         if (perf_session__create_kernel_maps(session) < 0)
                 goto out_delete;
 
         if (!perf_session__has_traces(session, "kmem record"))
                 goto out_delete;
 
+        if (perf_session__set_tracepoints_handlers(session, kmem_tracepoints)) {
+                pr_err("Initializing perf session tracepoint handlers failed\n");
+                return -1;
+        }
+
         setup_pager();
-        err = perf_session__process_events(session, &perf_kmem.tool);
+        err = perf_session__process_events(session, &perf_kmem);
         if (err != 0)
                 goto out_delete;
         sort_result();
@@ -635,8 +634,10 @@ static int sort_dimension__add(const char *tok, struct list_head *list)
         for (i = 0; i < NUM_AVAIL_SORTS; i++) {
                 if (!strcmp(avail_sorts[i]->name, tok)) {
                         sort = malloc(sizeof(*sort));
-                        if (!sort)
-                                die("malloc");
+                        if (!sort) {
+                                pr_err("%s: malloc failed\n", __func__);
+                                return -1;
+                        }
                         memcpy(sort, avail_sorts[i], sizeof(*sort));
                         list_add_tail(&sort->list, list);
                         return 0;
@@ -651,8 +652,10 @@ static int setup_sorting(struct list_head *sort_list, const char *arg)
         char *tok;
         char *str = strdup(arg);
 
-        if (!str)
-                die("strdup");
+        if (!str) {
+                pr_err("%s: strdup failed\n", __func__);
+                return -1;
+        }
 
         while (true) {
                 tok = strsep(&str, ",");
@@ -669,8 +672,8 @@ static int setup_sorting(struct list_head *sort_list, const char *arg)
         return 0;
 }
 
-static int parse_sort_opt(const struct option *opt __used,
-                          const char *arg, int unset __used)
+static int parse_sort_opt(const struct option *opt __maybe_unused,
+                          const char *arg, int unset __maybe_unused)
 {
         if (!arg)
                 return -1;
@@ -683,22 +686,24 @@ static int parse_sort_opt(const struct option *opt __used,
         return 0;
 }
 
-static int parse_caller_opt(const struct option *opt __used,
-                          const char *arg __used, int unset __used)
+static int parse_caller_opt(const struct option *opt __maybe_unused,
+                            const char *arg __maybe_unused,
+                            int unset __maybe_unused)
 {
         caller_flag = (alloc_flag + 1);
         return 0;
 }
 
-static int parse_alloc_opt(const struct option *opt __used,
-                          const char *arg __used, int unset __used)
+static int parse_alloc_opt(const struct option *opt __maybe_unused,
+                           const char *arg __maybe_unused,
+                           int unset __maybe_unused)
 {
         alloc_flag = (caller_flag + 1);
         return 0;
 }
 
-static int parse_line_opt(const struct option *opt __used,
-                          const char *arg, int unset __used)
+static int parse_line_opt(const struct option *opt __maybe_unused,
+                          const char *arg, int unset __maybe_unused)
 {
         int lines;
 
@@ -768,7 +773,7 @@ static int __cmd_record(int argc, const char **argv)
         return cmd_record(i, rec_argv, NULL);
 }
 
-int cmd_kmem(int argc, const char **argv, const char *prefix __used)
+int cmd_kmem(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
 
@@ -780,7 +785,8 @@ int cmd_kmem(int argc, const char **argv, const char *prefix __used)
         if (!strncmp(argv[0], "rec", 3)) {
                 return __cmd_record(argc, argv);
         } else if (!strcmp(argv[0], "stat")) {
-                setup_cpunode_map();
+                if (setup_cpunode_map())
+                        return -1;
 
                 if (list_empty(&caller_sort))
                         setup_sorting(&caller_sort, default_sort_order);
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 9fc6e0fa3dce..a28c9cad9048 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1,6 +1,7 @@
 #include "builtin.h"
 #include "perf.h"
 
+#include "util/evsel.h"
 #include "util/util.h"
 #include "util/cache.h"
 #include "util/symbol.h"
@@ -10,8 +11,10 @@
 
 #include "util/parse-options.h"
 #include "util/trace-event.h"
-
 #include "util/debug.h"
+#include "util/debugfs.h"
+#include "util/tool.h"
+#include "util/stat.h"
 
 #include <sys/prctl.h>
 
@@ -19,11 +22,836 @@
 #include <pthread.h>
 #include <math.h>
 
-static const char               *file_name;
+#include "../../arch/x86/include/asm/svm.h"
+#include "../../arch/x86/include/asm/vmx.h"
+#include "../../arch/x86/include/asm/kvm.h"
+
+struct event_key {
+        #define INVALID_KEY     (~0ULL)
+        u64 key;
+        int info;
+};
+
+struct kvm_events_ops {
+        bool (*is_begin_event)(struct perf_evsel *evsel,
+                               struct perf_sample *sample,
+                               struct event_key *key);
+        bool (*is_end_event)(struct perf_evsel *evsel,
+                             struct perf_sample *sample, struct event_key *key);
+        void (*decode_key)(struct event_key *key, char decode[20]);
+        const char *name;
+};
+
+static void exit_event_get_key(struct perf_evsel *evsel,
+                               struct perf_sample *sample,
+                               struct event_key *key)
+{
+        key->info = 0;
+        key->key = perf_evsel__intval(evsel, sample, "exit_reason");
+}
+
+static bool kvm_exit_event(struct perf_evsel *evsel)
+{
+        return !strcmp(evsel->name, "kvm:kvm_exit");
+}
+
+static bool exit_event_begin(struct perf_evsel *evsel,
+                             struct perf_sample *sample, struct event_key *key)
+{
+        if (kvm_exit_event(evsel)) {
+                exit_event_get_key(evsel, sample, key);
+                return true;
+        }
+
+        return false;
+}
+
+static bool kvm_entry_event(struct perf_evsel *evsel)
+{
+        return !strcmp(evsel->name, "kvm:kvm_entry");
+}
+
+static bool exit_event_end(struct perf_evsel *evsel,
+                           struct perf_sample *sample __maybe_unused,
+                           struct event_key *key __maybe_unused)
+{
+        return kvm_entry_event(evsel);
+}
+
+struct exit_reasons_table {
+        unsigned long exit_code;
+        const char *reason;
+};
+
+struct exit_reasons_table vmx_exit_reasons[] = {
+        VMX_EXIT_REASONS
+};
+
+struct exit_reasons_table svm_exit_reasons[] = {
+        SVM_EXIT_REASONS
+};
+
+static int cpu_isa;
+
+static const char *get_exit_reason(u64 exit_code)
+{
+        int table_size = ARRAY_SIZE(svm_exit_reasons);
+        struct exit_reasons_table *table = svm_exit_reasons;
+
+        if (cpu_isa == 1) {
+                table = vmx_exit_reasons;
+                table_size = ARRAY_SIZE(vmx_exit_reasons);
+        }
+
+        while (table_size--) {
+                if (table->exit_code == exit_code)
+                        return table->reason;
+                table++;
+        }
+
+        pr_err("unknown kvm exit code:%lld on %s\n",
+                (unsigned long long)exit_code, cpu_isa ? "VMX" : "SVM");
+        return "UNKNOWN";
+}
+
+static void exit_event_decode_key(struct event_key *key, char decode[20])
+{
+        const char *exit_reason = get_exit_reason(key->key);
+
+        scnprintf(decode, 20, "%s", exit_reason);
+}
+
+static struct kvm_events_ops exit_events = {
+        .is_begin_event = exit_event_begin,
+        .is_end_event = exit_event_end,
+        .decode_key = exit_event_decode_key,
+        .name = "VM-EXIT"
+};
+
+    /*
+     * For the mmio events, we treat:
+     * the time of MMIO write: kvm_mmio(KVM_TRACE_MMIO_WRITE...) -> kvm_entry
+     * the time of MMIO read: kvm_exit -> kvm_mmio(KVM_TRACE_MMIO_READ...).
+     */
+static void mmio_event_get_key(struct perf_evsel *evsel, struct perf_sample *sample,
+                               struct event_key *key)
+{
+        key->key  = perf_evsel__intval(evsel, sample, "gpa");
+        key->info = perf_evsel__intval(evsel, sample, "type");
+}
+
+#define KVM_TRACE_MMIO_READ_UNSATISFIED 0
+#define KVM_TRACE_MMIO_READ 1
+#define KVM_TRACE_MMIO_WRITE 2
+
+static bool mmio_event_begin(struct perf_evsel *evsel,
+                             struct perf_sample *sample, struct event_key *key)
+{
+        /* MMIO read begin event in kernel. */
+        if (kvm_exit_event(evsel))
+                return true;
+
+        /* MMIO write begin event in kernel. */
+        if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
+            perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_WRITE) {
+                mmio_event_get_key(evsel, sample, key);
+                return true;
+        }
+
+        return false;
+}
+
+static bool mmio_event_end(struct perf_evsel *evsel, struct perf_sample *sample,
+                           struct event_key *key)
+{
+        /* MMIO write end event in kernel. */
+        if (kvm_entry_event(evsel))
+                return true;
+
+        /* MMIO read end event in kernel.*/
+        if (!strcmp(evsel->name, "kvm:kvm_mmio") &&
+            perf_evsel__intval(evsel, sample, "type") == KVM_TRACE_MMIO_READ) {
+                mmio_event_get_key(evsel, sample, key);
+                return true;
+        }
+
+        return false;
+}
+
+static void mmio_event_decode_key(struct event_key *key, char decode[20])
+{
+        scnprintf(decode, 20, "%#lx:%s", (unsigned long)key->key,
+                                key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R");
+}
+
+static struct kvm_events_ops mmio_events = {
+        .is_begin_event = mmio_event_begin,
+        .is_end_event = mmio_event_end,
+        .decode_key = mmio_event_decode_key,
+        .name = "MMIO Access"
+};
+
+ /* The time of emulation pio access is from kvm_pio to kvm_entry. */
+static void ioport_event_get_key(struct perf_evsel *evsel,
+                                 struct perf_sample *sample,
+                                 struct event_key *key)
+{
+        key->key  = perf_evsel__intval(evsel, sample, "port");
+        key->info = perf_evsel__intval(evsel, sample, "rw");
+}
+
+static bool ioport_event_begin(struct perf_evsel *evsel,
+                               struct perf_sample *sample,
+                               struct event_key *key)
+{
+        if (!strcmp(evsel->name, "kvm:kvm_pio")) {
+                ioport_event_get_key(evsel, sample, key);
+                return true;
+        }
+
+        return false;
+}
+
+static bool ioport_event_end(struct perf_evsel *evsel,
+                             struct perf_sample *sample __maybe_unused,
+                             struct event_key *key __maybe_unused)
+{
+        return kvm_entry_event(evsel);
+}
+
+static void ioport_event_decode_key(struct event_key *key, char decode[20])
+{
+        scnprintf(decode, 20, "%#llx:%s", (unsigned long long)key->key,
+                                key->info ? "POUT" : "PIN");
+}
+
+static struct kvm_events_ops ioport_events = {
+        .is_begin_event = ioport_event_begin,
+        .is_end_event = ioport_event_end,
+        .decode_key = ioport_event_decode_key,
+        .name = "IO Port Access"
+};
+
+static const char *report_event = "vmexit";
+struct kvm_events_ops *events_ops;
+
+static bool register_kvm_events_ops(void)
+{
+        bool ret = true;
+
+        if (!strcmp(report_event, "vmexit"))
+                events_ops = &exit_events;
+        else if (!strcmp(report_event, "mmio"))
+                events_ops = &mmio_events;
+        else if (!strcmp(report_event, "ioport"))
+                events_ops = &ioport_events;
+        else {
+                pr_err("Unknown report event:%s\n", report_event);
+                ret = false;
+        }
+
+        return ret;
+}
+
+struct kvm_event_stats {
+        u64 time;
+        struct stats stats;
+};
+
+struct kvm_event {
+        struct list_head hash_entry;
+        struct rb_node rb;
+
+        struct event_key key;
+
+        struct kvm_event_stats total;
+
+        #define DEFAULT_VCPU_NUM 8
+        int max_vcpu;
+        struct kvm_event_stats *vcpu;
+};
+
+struct vcpu_event_record {
+        int vcpu_id;
+        u64 start_time;
+        struct kvm_event *last_event;
+};
+
+#define EVENTS_BITS                     12
+#define EVENTS_CACHE_SIZE       (1UL << EVENTS_BITS)
+
+static u64 total_time;
+static u64 total_count;
+static struct list_head kvm_events_cache[EVENTS_CACHE_SIZE];
+
+static void init_kvm_event_record(void)
+{
+        int i;
+
+        for (i = 0; i < (int)EVENTS_CACHE_SIZE; i++)
+                INIT_LIST_HEAD(&kvm_events_cache[i]);
+}
+
+static int kvm_events_hash_fn(u64 key)
+{
+        return key & (EVENTS_CACHE_SIZE - 1);
+}
+
+static bool kvm_event_expand(struct kvm_event *event, int vcpu_id)
+{
+        int old_max_vcpu = event->max_vcpu;
+
+        if (vcpu_id < event->max_vcpu)
+                return true;
+
+        while (event->max_vcpu <= vcpu_id)
+                event->max_vcpu += DEFAULT_VCPU_NUM;
+
+        event->vcpu = realloc(event->vcpu,
+                              event->max_vcpu * sizeof(*event->vcpu));
+        if (!event->vcpu) {
+                pr_err("Not enough memory\n");
+                return false;
+        }
+
+        memset(event->vcpu + old_max_vcpu, 0,
+               (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu));
+        return true;
+}
+
+static struct kvm_event *kvm_alloc_init_event(struct event_key *key)
+{
+        struct kvm_event *event;
+
+        event = zalloc(sizeof(*event));
+        if (!event) {
+                pr_err("Not enough memory\n");
+                return NULL;
+        }
+
+        event->key = *key;
+        return event;
+}
+
+static struct kvm_event *find_create_kvm_event(struct event_key *key)
+{
+        struct kvm_event *event;
+        struct list_head *head;
+
+        BUG_ON(key->key == INVALID_KEY);
+
+        head = &kvm_events_cache[kvm_events_hash_fn(key->key)];
+        list_for_each_entry(event, head, hash_entry)
+                if (event->key.key == key->key && event->key.info == key->info)
+                        return event;
+
+        event = kvm_alloc_init_event(key);
+        if (!event)
+                return NULL;
+
+        list_add(&event->hash_entry, head);
+        return event;
+}
+
+static bool handle_begin_event(struct vcpu_event_record *vcpu_record,
+                               struct event_key *key, u64 timestamp)
+{
+        struct kvm_event *event = NULL;
+
+        if (key->key != INVALID_KEY)
+                event = find_create_kvm_event(key);
+
+        vcpu_record->last_event = event;
+        vcpu_record->start_time = timestamp;
+        return true;
+}
+
+static void
+kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff)
+{
+        kvm_stats->time += time_diff;
+        update_stats(&kvm_stats->stats, time_diff);
+}
+
+static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event)
+{
+        struct kvm_event_stats *kvm_stats = &event->total;
+
+        if (vcpu_id != -1)
+                kvm_stats = &event->vcpu[vcpu_id];
+
+        return rel_stddev_stats(stddev_stats(&kvm_stats->stats),
+                                avg_stats(&kvm_stats->stats));
+}
+
+static bool update_kvm_event(struct kvm_event *event, int vcpu_id,
+                             u64 time_diff)
+{
+        kvm_update_event_stats(&event->total, time_diff);
+
+        if (!kvm_event_expand(event, vcpu_id))
+                return false;
+
+        kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff);
+        return true;
+}
+
+static bool handle_end_event(struct vcpu_event_record *vcpu_record,
+                             struct event_key *key, u64 timestamp)
+{
+        struct kvm_event *event;
+        u64 time_begin, time_diff;
+
+        event = vcpu_record->last_event;
+        time_begin = vcpu_record->start_time;
+
+        /* The begin event is not caught. */
+        if (!time_begin)
+                return true;
+
+        /*
+         * In some case, the 'begin event' only records the start timestamp,
+         * the actual event is recognized in the 'end event' (e.g. mmio-event).
+         */
+
+        /* Both begin and end events did not get the key. */
+        if (!event && key->key == INVALID_KEY)
+                return true;
+
+        if (!event)
+                event = find_create_kvm_event(key);
+
+        if (!event)
+                return false;
+
+        vcpu_record->last_event = NULL;
+        vcpu_record->start_time = 0;
+
+        BUG_ON(timestamp < time_begin);
+
+        time_diff = timestamp - time_begin;
+        return update_kvm_event(event, vcpu_record->vcpu_id, time_diff);
+}
+
+static
+struct vcpu_event_record *per_vcpu_record(struct thread *thread,
+                                          struct perf_evsel *evsel,
+                                          struct perf_sample *sample)
+{
+        /* Only kvm_entry records vcpu id. */
+        if (!thread->priv && kvm_entry_event(evsel)) {
+                struct vcpu_event_record *vcpu_record;
+
+                vcpu_record = zalloc(sizeof(*vcpu_record));
+                if (!vcpu_record) {
+                        pr_err("%s: Not enough memory\n", __func__);
+                        return NULL;
+                }
+
+                vcpu_record->vcpu_id = perf_evsel__intval(evsel, sample, "vcpu_id");
+                thread->priv = vcpu_record;
+        }
+
+        return thread->priv;
+}
+
+static bool handle_kvm_event(struct thread *thread, struct perf_evsel *evsel,
+                             struct perf_sample *sample)
+{
+        struct vcpu_event_record *vcpu_record;
+        struct event_key key = {.key = INVALID_KEY};
+
+        vcpu_record = per_vcpu_record(thread, evsel, sample);
+        if (!vcpu_record)
+                return true;
+
+        if (events_ops->is_begin_event(evsel, sample, &key))
+                return handle_begin_event(vcpu_record, &key, sample->time);
+
+        if (events_ops->is_end_event(evsel, sample, &key))
+                return handle_end_event(vcpu_record, &key, sample->time);
+
+        return true;
+}
+
+typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int);
+struct kvm_event_key {
+        const char *name;
+        key_cmp_fun key;
+};
+
+static int trace_vcpu = -1;
+#define GET_EVENT_KEY(func, field)                                      \
+static u64 get_event_ ##func(struct kvm_event *event, int vcpu)         \
+{                                                                       \
+        if (vcpu == -1)                                                 \
+                return event->total.field;                              \
+                                                                        \
+        if (vcpu >= event->max_vcpu)                                    \
+                return 0;                                               \
+                                                                        \
+        return event->vcpu[vcpu].field;                                 \
+}
+
+#define COMPARE_EVENT_KEY(func, field)                                  \
+GET_EVENT_KEY(func, field)                                              \
+static int compare_kvm_event_ ## func(struct kvm_event *one,            \
+                                        struct kvm_event *two, int vcpu)\
+{                                                                       \
+        return get_event_ ##func(one, vcpu) >                           \
+                                get_event_ ##func(two, vcpu);           \
+}
+
+GET_EVENT_KEY(time, time);
+COMPARE_EVENT_KEY(count, stats.n);
+COMPARE_EVENT_KEY(mean, stats.mean);
+
+#define DEF_SORT_NAME_KEY(name, compare_key)                            \
+        { #name, compare_kvm_event_ ## compare_key }
+
+static struct kvm_event_key keys[] = {
+        DEF_SORT_NAME_KEY(sample, count),
+        DEF_SORT_NAME_KEY(time, mean),
+        { NULL, NULL }
+};
+
+static const char *sort_key = "sample";
+static key_cmp_fun compare;
+
+static bool select_key(void)
+{
+        int i;
+
+        for (i = 0; keys[i].name; i++) {
+                if (!strcmp(keys[i].name, sort_key)) {
+                        compare = keys[i].key;
+                        return true;
+                }
+        }
+
+        pr_err("Unknown compare key:%s\n", sort_key);
+        return false;
+}
+
+static struct rb_root result;
+static void insert_to_result(struct kvm_event *event, key_cmp_fun bigger,
+                             int vcpu)
+{
+        struct rb_node **rb = &result.rb_node;
+        struct rb_node *parent = NULL;
+        struct kvm_event *p;
+
+        while (*rb) {
+                p = container_of(*rb, struct kvm_event, rb);
+                parent = *rb;
+
+                if (bigger(event, p, vcpu))
+                        rb = &(*rb)->rb_left;
+                else
+                        rb = &(*rb)->rb_right;
+        }
+
+        rb_link_node(&event->rb, parent, rb);
+        rb_insert_color(&event->rb, &result);
+}
+
+static void update_total_count(struct kvm_event *event, int vcpu)
+{
+        total_count += get_event_count(event, vcpu);
+        total_time += get_event_time(event, vcpu);
+}
+
+static bool event_is_valid(struct kvm_event *event, int vcpu)
+{
+        return !!get_event_count(event, vcpu);
+}
+
+static void sort_result(int vcpu)
+{
+        unsigned int i;
+        struct kvm_event *event;
+
+        for (i = 0; i < EVENTS_CACHE_SIZE; i++)
+                list_for_each_entry(event, &kvm_events_cache[i], hash_entry)
+                        if (event_is_valid(event, vcpu)) {
+                                update_total_count(event, vcpu);
+                                insert_to_result(event, compare, vcpu);
+                        }
+}
+
+/* returns left most element of result, and erase it */
+static struct kvm_event *pop_from_result(void)
+{
+        struct rb_node *node = rb_first(&result);
+
+        if (!node)
+                return NULL;
+
+        rb_erase(node, &result);
+        return container_of(node, struct kvm_event, rb);
+}
+
+static void print_vcpu_info(int vcpu)
+{
+        pr_info("Analyze events for ");
+
+        if (vcpu == -1)
+                pr_info("all VCPUs:\n\n");
+        else
+                pr_info("VCPU %d:\n\n", vcpu);
+}
+
+static void print_result(int vcpu)
+{
+        char decode[20];
+        struct kvm_event *event;
+
+        pr_info("\n\n");
+        print_vcpu_info(vcpu);
+        pr_info("%20s ", events_ops->name);
+        pr_info("%10s ", "Samples");
+        pr_info("%9s ", "Samples%");
+
+        pr_info("%9s ", "Time%");
+        pr_info("%16s ", "Avg time");
+        pr_info("\n\n");
+
+        while ((event = pop_from_result())) {
+                u64 ecount, etime;
+
+                ecount = get_event_count(event, vcpu);
+                etime = get_event_time(event, vcpu);
+
+                events_ops->decode_key(&event->key, decode);
+                pr_info("%20s ", decode);
+                pr_info("%10llu ", (unsigned long long)ecount);
+                pr_info("%8.2f%% ", (double)ecount / total_count * 100);
+                pr_info("%8.2f%% ", (double)etime / total_time * 100);
+                pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3,
+                        kvm_event_rel_stddev(vcpu, event));
+                pr_info("\n");
+        }
+
+        pr_info("\nTotal Samples:%lld, Total events handled time:%.2fus.\n\n",
+                (unsigned long long)total_count, total_time / 1e3);
+}
+
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
+                                union perf_event *event,
+                                struct perf_sample *sample,
+                                struct perf_evsel *evsel,
+                                struct machine *machine)
+{
+        struct thread *thread = machine__findnew_thread(machine, sample->tid);
+
+        if (thread == NULL) {
+                pr_debug("problem processing %d event, skipping it.\n",
+                        event->header.type);
+                return -1;
+        }
+
+        if (!handle_kvm_event(thread, evsel, sample))
+                return -1;
+
+        return 0;
+}
+
+static struct perf_tool eops = {
+        .sample                 = process_sample_event,
+        .comm                   = perf_event__process_comm,
+        .ordered_samples        = true,
+};
+
+static int get_cpu_isa(struct perf_session *session)
+{
+        char *cpuid = session->header.env.cpuid;
+        int isa;
+
+        if (strstr(cpuid, "Intel"))
+                isa = 1;
+        else if (strstr(cpuid, "AMD"))
+                isa = 0;
+        else {
+                pr_err("CPU %s is not supported.\n", cpuid);
+                isa = -ENOTSUP;
+        }
+
+        return isa;
+}
+
+static const char *file_name;
+
+static int read_events(void)
+{
+        struct perf_session *kvm_session;
+        int ret;
+
+        kvm_session = perf_session__new(file_name, O_RDONLY, 0, false, &eops);
+        if (!kvm_session) {
+                pr_err("Initializing perf session failed\n");
+                return -EINVAL;
+        }
+
+        if (!perf_session__has_traces(kvm_session, "kvm record"))
+                return -EINVAL;
+
+        /*
+         * Do not use 'isa' recorded in kvm_exit tracepoint since it is not
+         * traced in the old kernel.
+         */
+        ret = get_cpu_isa(kvm_session);
+
+        if (ret < 0)
+                return ret;
+
+        cpu_isa = ret;
+
+        return perf_session__process_events(kvm_session, &eops);
+}
+
+static bool verify_vcpu(int vcpu)
+{
+        if (vcpu != -1 && vcpu < 0) {
+                pr_err("Invalid vcpu:%d.\n", vcpu);
+                return false;
+        }
+
+        return true;
+}
+
+static int kvm_events_report_vcpu(int vcpu)
+{
+        int ret = -EINVAL;
+
+        if (!verify_vcpu(vcpu))
+                goto exit;
+
+        if (!select_key())
+                goto exit;
+
+        if (!register_kvm_events_ops())
+                goto exit;
+
+        init_kvm_event_record();
+        setup_pager();
+
+        ret = read_events();
+        if (ret)
+                goto exit;
+
+        sort_result(vcpu);
+        print_result(vcpu);
+exit:
+        return ret;
+}
+
+static const char * const record_args[] = {
+        "record",
+        "-R",
+        "-f",
+        "-m", "1024",
+        "-c", "1",
+        "-e", "kvm:kvm_entry",
+        "-e", "kvm:kvm_exit",
+        "-e", "kvm:kvm_mmio",
+        "-e", "kvm:kvm_pio",
+};
+
+#define STRDUP_FAIL_EXIT(s)             \
+        ({      char *_p;               \
+        _p = strdup(s);         \
+                if (!_p)                \
+                        return -ENOMEM; \
+                _p;                     \
+        })
+
+static int kvm_events_record(int argc, const char **argv)
+{
+        unsigned int rec_argc, i, j;
+        const char **rec_argv;
+
+        rec_argc = ARRAY_SIZE(record_args) + argc + 2;
+        rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+        if (rec_argv == NULL)
+                return -ENOMEM;
+
+        for (i = 0; i < ARRAY_SIZE(record_args); i++)
+                rec_argv[i] = STRDUP_FAIL_EXIT(record_args[i]);
+
+        rec_argv[i++] = STRDUP_FAIL_EXIT("-o");
+        rec_argv[i++] = STRDUP_FAIL_EXIT(file_name);
+
+        for (j = 1; j < (unsigned int)argc; j++, i++)
+                rec_argv[i] = argv[j];
+
+        return cmd_record(i, rec_argv, NULL);
+}
+
+static const char * const kvm_events_report_usage[] = {
+        "perf kvm stat report [<options>]",
+        NULL
+};
+
+static const struct option kvm_events_report_options[] = {
+        OPT_STRING(0, "event", &report_event, "report event",
+                    "event for reporting: vmexit, mmio, ioport"),
+        OPT_INTEGER(0, "vcpu", &trace_vcpu,
+                    "vcpu id to report"),
+        OPT_STRING('k', "key", &sort_key, "sort-key",
+                    "key for sorting: sample(sort by samples number)"
+                    " time (sort by avg time)"),
+        OPT_END()
+};
+
+static int kvm_events_report(int argc, const char **argv)
+{
+        symbol__init();
+
+        if (argc) {
+                argc = parse_options(argc, argv,
+                                     kvm_events_report_options,
+                                     kvm_events_report_usage, 0);
+                if (argc)
+                        usage_with_options(kvm_events_report_usage,
+                                           kvm_events_report_options);
+        }
+
+        return kvm_events_report_vcpu(trace_vcpu);
+}
+
+static void print_kvm_stat_usage(void)
+{
+        printf("Usage: perf kvm stat <command>\n\n");
+
+        printf("# Available commands:\n");
+        printf("\trecord: record kvm events\n");
+        printf("\treport: report statistical data of kvm events\n");
+
+        printf("\nOtherwise, it is the alias of 'perf stat':\n");
+}
+
+static int kvm_cmd_stat(int argc, const char **argv)
+{
+        if (argc == 1) {
+                print_kvm_stat_usage();
+                goto perf_stat;
+        }
+
+        if (!strncmp(argv[1], "rec", 3))
+                return kvm_events_record(argc - 1, argv + 1);
+
+        if (!strncmp(argv[1], "rep", 3))
+                return kvm_events_report(argc - 1 , argv + 1);
+
+perf_stat:
+        return cmd_stat(argc, argv, NULL);
+}
+
 static char                     name_buffer[256];
 
 static const char * const kvm_usage[] = {
-        "perf kvm [<options>] {top|record|report|diff|buildid-list}",
+        "perf kvm [<options>] {top|record|report|diff|buildid-list|stat}",
         NULL
 };
 
@@ -102,7 +930,7 @@ static int __cmd_buildid_list(int argc, const char **argv)
         return cmd_buildid_list(i, rec_argv, NULL);
 }
 
-int cmd_kvm(int argc, const char **argv, const char *prefix __used)
+int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         perf_host  = 0;
         perf_guest = 1;
@@ -135,6 +963,8 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __used)
                 return cmd_top(argc, argv, NULL);
         else if (!strncmp(argv[0], "buildid-list", 12))
                 return __cmd_buildid_list(argc, argv);
+        else if (!strncmp(argv[0], "stat", 4))
+                return kvm_cmd_stat(argc, argv);
         else
                 usage_with_options(kvm_usage, kvm_options);
 
diff --git a/tools/perf/builtin-list.c b/tools/perf/builtin-list.c
index 6313b6eb3ebb..1948eceb517a 100644
--- a/tools/perf/builtin-list.c
+++ b/tools/perf/builtin-list.c
@@ -14,20 +14,20 @@
 #include "util/parse-events.h"
 #include "util/cache.h"
 
-int cmd_list(int argc, const char **argv, const char *prefix __used)
+int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         setup_pager();
 
         if (argc == 1)
-                print_events(NULL);
+                print_events(NULL, false);
         else {
                 int i;
 
                 for (i = 1; i < argc; ++i) {
-                        if (i > 1)
+                        if (i > 2)
                                 putchar('\n');
                         if (strncmp(argv[i], "tracepoint", 10) == 0)
-                                print_tracepoint_events(NULL, NULL);
+                                print_tracepoint_events(NULL, NULL, false);
                         else if (strcmp(argv[i], "hw") == 0 ||
                                  strcmp(argv[i], "hardware") == 0)
                                 print_events_type(PERF_TYPE_HARDWARE);
@@ -36,13 +36,15 @@ int cmd_list(int argc, const char **argv, const char *prefix __used)
                                 print_events_type(PERF_TYPE_SOFTWARE);
                         else if (strcmp(argv[i], "cache") == 0 ||
                                  strcmp(argv[i], "hwcache") == 0)
-                                print_hwcache_events(NULL);
+                                print_hwcache_events(NULL, false);
+                        else if (strcmp(argv[i], "--raw-dump") == 0)
+                                print_events(NULL, true);
                         else {
                                 char *sep = strchr(argv[i], ':'), *s;
                                 int sep_idx;
 
                                 if (sep == NULL) {
-                                        print_events(argv[i]);
+                                        print_events(argv[i], false);
                                         continue;
                                 }
                                 sep_idx = sep - argv[i];
@@ -51,7 +53,7 @@ int cmd_list(int argc, const char **argv, const char *prefix __used)
                                         return -1;
 
                                 s[sep_idx] = '\0';
-                                print_tracepoint_events(s, s + sep_idx + 1);
+                                print_tracepoint_events(s, s + sep_idx + 1, false);
                                 free(s);
                         }
                 }
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index b3c428548868..7d6e09949880 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -1,6 +1,8 @@
 #include "builtin.h"
 #include "perf.h"
 
+#include "util/evlist.h"
+#include "util/evsel.h"
 #include "util/util.h"
 #include "util/cache.h"
 #include "util/symbol.h"
@@ -40,7 +42,7 @@ struct lock_stat {
         struct rb_node          rb;             /* used for sorting */
 
         /*
-         * FIXME: raw_field_value() returns unsigned long long,
+         * FIXME: perf_evsel__intval() returns u64,
          * so address of lockdep_map should be dealed as 64bit.
          * Is there more better solution?
          */
@@ -160,8 +162,10 @@ static struct thread_stat *thread_stat_findnew_after_first(u32 tid)
                 return st;
 
         st = zalloc(sizeof(struct thread_stat));
-        if (!st)
-                die("memory allocation failed\n");
+        if (!st) {
+                pr_err("memory allocation failed\n");
+                return NULL;
+        }
 
         st->tid = tid;
         INIT_LIST_HEAD(&st->seq_list);
@@ -180,8 +184,10 @@ static struct thread_stat *thread_stat_findnew_first(u32 tid)
         struct thread_stat *st;
 
         st = zalloc(sizeof(struct thread_stat));
-        if (!st)
-                die("memory allocation failed\n");
+        if (!st) {
+                pr_err("memory allocation failed\n");
+                return NULL;
+        }
         st->tid = tid;
         INIT_LIST_HEAD(&st->seq_list);
 
@@ -247,18 +253,20 @@ struct lock_key keys[] = {
         { NULL, NULL }
 };
 
-static void select_key(void)
+static int select_key(void)
 {
         int i;
 
         for (i = 0; keys[i].name; i++) {
                 if (!strcmp(keys[i].name, sort_key)) {
                         compare = keys[i].key;
-                        return;
+                        return 0;
                 }
         }
 
-        die("Unknown compare key:%s\n", sort_key);
+        pr_err("Unknown compare key: %s\n", sort_key);
+
+        return -1;
 }
 
 static void insert_to_result(struct lock_stat *st,
@@ -323,61 +331,24 @@ static struct lock_stat *lock_stat_findnew(void *addr, const char *name)
         return new;
 
 alloc_failed:
-        die("memory allocation failed\n");
+        pr_err("memory allocation failed\n");
+        return NULL;
 }
 
 static const char *input_name;
 
-struct raw_event_sample {
-        u32                     size;
-        char                    data[0];
-};
-
-struct trace_acquire_event {
-        void                    *addr;
-        const char              *name;
-        int                     flag;
-};
-
-struct trace_acquired_event {
-        void                    *addr;
-        const char              *name;
-};
+struct trace_lock_handler {
+        int (*acquire_event)(struct perf_evsel *evsel,
+                             struct perf_sample *sample);
 
-struct trace_contended_event {
-        void                    *addr;
-        const char              *name;
-};
+        int (*acquired_event)(struct perf_evsel *evsel,
+                              struct perf_sample *sample);
 
-struct trace_release_event {
-        void                    *addr;
-        const char              *name;
-};
+        int (*contended_event)(struct perf_evsel *evsel,
+                               struct perf_sample *sample);
 
-struct trace_lock_handler {
-        void (*acquire_event)(struct trace_acquire_event *,
-                              struct event_format *,
-                              int cpu,
-                              u64 timestamp,
-                              struct thread *thread);
-
-        void (*acquired_event)(struct trace_acquired_event *,
-                               struct event_format *,
-                               int cpu,
-                               u64 timestamp,
-                               struct thread *thread);
-
-        void (*contended_event)(struct trace_contended_event *,
-                                struct event_format *,
-                                int cpu,
-                                u64 timestamp,
-                                struct thread *thread);
-
-        void (*release_event)(struct trace_release_event *,
-                              struct event_format *,
-                              int cpu,
-                              u64 timestamp,
-                              struct thread *thread);
+        int (*release_event)(struct perf_evsel *evsel,
+                             struct perf_sample *sample);
 };
 
 static struct lock_seq_stat *get_seq(struct thread_stat *ts, void *addr)
@@ -390,8 +361,10 @@ static struct lock_seq_stat *get_seq(struct thread_stat *ts, void *addr)
         }
 
         seq = zalloc(sizeof(struct lock_seq_stat));
-        if (!seq)
-                die("Not enough memory\n");
+        if (!seq) {
+                pr_err("memory allocation failed\n");
+                return NULL;
+        }
         seq->state = SEQ_STATE_UNINITIALIZED;
         seq->addr = addr;
 
@@ -414,33 +387,42 @@ enum acquire_flags {
         READ_LOCK = 2,
 };
 
-static void
-report_lock_acquire_event(struct trace_acquire_event *acquire_event,
-                        struct event_format *__event __used,
-                        int cpu __used,
-                        u64 timestamp __used,
-                        struct thread *thread __used)
+static int report_lock_acquire_event(struct perf_evsel *evsel,
+                                     struct perf_sample *sample)
 {
+        void *addr;
         struct lock_stat *ls;
         struct thread_stat *ts;
         struct lock_seq_stat *seq;
+        const char *name = perf_evsel__strval(evsel, sample, "name");
+        u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
+        int flag = perf_evsel__intval(evsel, sample, "flag");
+
+        memcpy(&addr, &tmp, sizeof(void *));
 
-        ls = lock_stat_findnew(acquire_event->addr, acquire_event->name);
+        ls = lock_stat_findnew(addr, name);
+        if (!ls)
+                return -1;
         if (ls->discard)
-                return;
+                return 0;
 
-        ts = thread_stat_findnew(thread->pid);
-        seq = get_seq(ts, acquire_event->addr);
+        ts = thread_stat_findnew(sample->tid);
+        if (!ts)
+                return -1;
+
+        seq = get_seq(ts, addr);
+        if (!seq)
+                return -1;
 
         switch (seq->state) {
         case SEQ_STATE_UNINITIALIZED:
         case SEQ_STATE_RELEASED:
-                if (!acquire_event->flag) {
+                if (!flag) {
                         seq->state = SEQ_STATE_ACQUIRING;
                 } else {
-                        if (acquire_event->flag & TRY_LOCK)
+                        if (flag & TRY_LOCK)
                                 ls->nr_trylock++;
-                        if (acquire_event->flag & READ_LOCK)
+                        if (flag & READ_LOCK)
                                 ls->nr_readlock++;
                         seq->state = SEQ_STATE_READ_ACQUIRED;
                         seq->read_count = 1;
@@ -448,7 +430,7 @@ report_lock_acquire_event(struct trace_acquire_event *acquire_event,
                 }
                 break;
         case SEQ_STATE_READ_ACQUIRED:
-                if (acquire_event->flag & READ_LOCK) {
+                if (flag & READ_LOCK) {
                         seq->read_count++;
                         ls->nr_acquired++;
                         goto end;
@@ -473,38 +455,46 @@ broken:
         }
 
         ls->nr_acquire++;
-        seq->prev_event_time = timestamp;
+        seq->prev_event_time = sample->time;
 end:
-        return;
+        return 0;
 }
 
-static void
-report_lock_acquired_event(struct trace_acquired_event *acquired_event,
-                         struct event_format *__event __used,
-                         int cpu __used,
-                         u64 timestamp __used,
-                         struct thread *thread __used)
+static int report_lock_acquired_event(struct perf_evsel *evsel,
+                                      struct perf_sample *sample)
 {
+        void *addr;
         struct lock_stat *ls;
         struct thread_stat *ts;
         struct lock_seq_stat *seq;
         u64 contended_term;
+        const char *name = perf_evsel__strval(evsel, sample, "name");
+        u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
+
+        memcpy(&addr, &tmp, sizeof(void *));
 
-        ls = lock_stat_findnew(acquired_event->addr, acquired_event->name);
+        ls = lock_stat_findnew(addr, name);
+        if (!ls)
+                return -1;
         if (ls->discard)
-                return;
+                return 0;
+
+        ts = thread_stat_findnew(sample->tid);
+        if (!ts)
+                return -1;
 
-        ts = thread_stat_findnew(thread->pid);
-        seq = get_seq(ts, acquired_event->addr);
+        seq = get_seq(ts, addr);
+        if (!seq)
+                return -1;
 
         switch (seq->state) {
         case SEQ_STATE_UNINITIALIZED:
                 /* orphan event, do nothing */
-                return;
+                return 0;
         case SEQ_STATE_ACQUIRING:
                 break;
         case SEQ_STATE_CONTENDED:
-                contended_term = timestamp - seq->prev_event_time;
+                contended_term = sample->time - seq->prev_event_time;
                 ls->wait_time_total += contended_term;
                 if (contended_term < ls->wait_time_min)
                         ls->wait_time_min = contended_term;
@@ -529,33 +519,41 @@ report_lock_acquired_event(struct trace_acquired_event *acquired_event,
 
         seq->state = SEQ_STATE_ACQUIRED;
         ls->nr_acquired++;
-        seq->prev_event_time = timestamp;
+        seq->prev_event_time = sample->time;
 end:
-        return;
+        return 0;
 }
 
-static void
-report_lock_contended_event(struct trace_contended_event *contended_event,
-                          struct event_format *__event __used,
-                          int cpu __used,
-                          u64 timestamp __used,
-                          struct thread *thread __used)
+static int report_lock_contended_event(struct perf_evsel *evsel,
+                                       struct perf_sample *sample)
 {
+        void *addr;
         struct lock_stat *ls;
         struct thread_stat *ts;
         struct lock_seq_stat *seq;
+        const char *name = perf_evsel__strval(evsel, sample, "name");
+        u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
 
-        ls = lock_stat_findnew(contended_event->addr, contended_event->name);
+        memcpy(&addr, &tmp, sizeof(void *));
+
+        ls = lock_stat_findnew(addr, name);
+        if (!ls)
+                return -1;
         if (ls->discard)
-                return;
+                return 0;
+
+        ts = thread_stat_findnew(sample->tid);
+        if (!ts)
+                return -1;
 
-        ts = thread_stat_findnew(thread->pid);
-        seq = get_seq(ts, contended_event->addr);
+        seq = get_seq(ts, addr);
+        if (!seq)
+                return -1;
 
         switch (seq->state) {
         case SEQ_STATE_UNINITIALIZED:
                 /* orphan event, do nothing */
-                return;
+                return 0;
         case SEQ_STATE_ACQUIRING:
                 break;
         case SEQ_STATE_RELEASED:
@@ -576,28 +574,36 @@ report_lock_contended_event(struct trace_contended_event *contended_event,
 
         seq->state = SEQ_STATE_CONTENDED;
         ls->nr_contended++;
-        seq->prev_event_time = timestamp;
+        seq->prev_event_time = sample->time;
 end:
-        return;
+        return 0;
 }
 
-static void
-report_lock_release_event(struct trace_release_event *release_event,
-                        struct event_format *__event __used,
-                        int cpu __used,
-                        u64 timestamp __used,
-                        struct thread *thread __used)
+static int report_lock_release_event(struct perf_evsel *evsel,
+                                     struct perf_sample *sample)
 {
+        void *addr;
         struct lock_stat *ls;
         struct thread_stat *ts;
         struct lock_seq_stat *seq;
+        const char *name = perf_evsel__strval(evsel, sample, "name");
+        u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
+
+        memcpy(&addr, &tmp, sizeof(void *));
 
-        ls = lock_stat_findnew(release_event->addr, release_event->name);
+        ls = lock_stat_findnew(addr, name);
+        if (!ls)
+                return -1;
         if (ls->discard)
-                return;
+                return 0;
+
+        ts = thread_stat_findnew(sample->tid);
+        if (!ts)
+                return -1;
 
-        ts = thread_stat_findnew(thread->pid);
-        seq = get_seq(ts, release_event->addr);
+        seq = get_seq(ts, addr);
+        if (!seq)
+                return -1;
 
         switch (seq->state) {
         case SEQ_STATE_UNINITIALIZED:
@@ -631,7 +637,7 @@ free_seq:
         list_del(&seq->list);
         free(seq);
 end:
-        return;
+        return 0;
 }
 
 /* lock oriented handlers */
@@ -645,96 +651,36 @@ static struct trace_lock_handler report_lock_ops  = {
 
 static struct trace_lock_handler *trace_handler;
 
-static void
-process_lock_acquire_event(void *data,
-                           struct event_format *event __used,
-                           int cpu __used,
-                           u64 timestamp __used,
-                           struct thread *thread __used)
-{
-        struct trace_acquire_event acquire_event;
-        u64 tmp;                /* this is required for casting... */
-
-        tmp = raw_field_value(event, "lockdep_addr", data);
-        memcpy(&acquire_event.addr, &tmp, sizeof(void *));
-        acquire_event.name = (char *)raw_field_ptr(event, "name", data);
-        acquire_event.flag = (int)raw_field_value(event, "flag", data);
-
-        if (trace_handler->acquire_event)
-                trace_handler->acquire_event(&acquire_event, event, cpu, timestamp, thread);
-}
-
-static void
-process_lock_acquired_event(void *data,
-                            struct event_format *event __used,
-                            int cpu __used,
-                            u64 timestamp __used,
-                            struct thread *thread __used)
+static int perf_evsel__process_lock_acquire(struct perf_evsel *evsel,
+                                             struct perf_sample *sample)
 {
-        struct trace_acquired_event acquired_event;
-        u64 tmp;                /* this is required for casting... */
-
-        tmp = raw_field_value(event, "lockdep_addr", data);
-        memcpy(&acquired_event.addr, &tmp, sizeof(void *));
-        acquired_event.name = (char *)raw_field_ptr(event, "name", data);
-
         if (trace_handler->acquire_event)
-                trace_handler->acquired_event(&acquired_event, event, cpu, timestamp, thread);
+                return trace_handler->acquire_event(evsel, sample);
+        return 0;
 }
 
-static void
-process_lock_contended_event(void *data,
-                             struct event_format *event __used,
-                             int cpu __used,
-                             u64 timestamp __used,
-                             struct thread *thread __used)
+static int perf_evsel__process_lock_acquired(struct perf_evsel *evsel,
+                                              struct perf_sample *sample)
 {
-        struct trace_contended_event contended_event;
-        u64 tmp;                /* this is required for casting... */
-
-        tmp = raw_field_value(event, "lockdep_addr", data);
-        memcpy(&contended_event.addr, &tmp, sizeof(void *));
-        contended_event.name = (char *)raw_field_ptr(event, "name", data);
-
-        if (trace_handler->acquire_event)
-                trace_handler->contended_event(&contended_event, event, cpu, timestamp, thread);
+        if (trace_handler->acquired_event)
+                return trace_handler->acquired_event(evsel, sample);
+        return 0;
 }
 
-static void
-process_lock_release_event(void *data,
-                           struct event_format *event __used,
-                           int cpu __used,
-                           u64 timestamp __used,
-                           struct thread *thread __used)
+static int perf_evsel__process_lock_contended(struct perf_evsel *evsel,
+                                              struct perf_sample *sample)
 {
-        struct trace_release_event release_event;
-        u64 tmp;                /* this is required for casting... */
-
-        tmp = raw_field_value(event, "lockdep_addr", data);
-        memcpy(&release_event.addr, &tmp, sizeof(void *));
-        release_event.name = (char *)raw_field_ptr(event, "name", data);
-
-        if (trace_handler->acquire_event)
-                trace_handler->release_event(&release_event, event, cpu, timestamp, thread);
+        if (trace_handler->contended_event)
+                return trace_handler->contended_event(evsel, sample);
+        return 0;
 }
 
-static void
-process_raw_event(void *data, int cpu, u64 timestamp, struct thread *thread)
+static int perf_evsel__process_lock_release(struct perf_evsel *evsel,
+                                            struct perf_sample *sample)
 {
-        struct event_format *event;
-        int type;
-
-        type = trace_parse_common_type(session->pevent, data);
-        event = pevent_find_event(session->pevent, type);
-
-        if (!strcmp(event->name, "lock_acquire"))
-                process_lock_acquire_event(data, event, cpu, timestamp, thread);
-        if (!strcmp(event->name, "lock_acquired"))
-                process_lock_acquired_event(data, event, cpu, timestamp, thread);
-        if (!strcmp(event->name, "lock_contended"))
-                process_lock_contended_event(data, event, cpu, timestamp, thread);
-        if (!strcmp(event->name, "lock_release"))
-                process_lock_release_event(data, event, cpu, timestamp, thread);
+        if (trace_handler->release_event)
+                return trace_handler->release_event(evsel, sample);
+        return 0;
 }
 
 static void print_bad_events(int bad, int total)
@@ -836,20 +782,29 @@ static void dump_map(void)
         }
 }
 
-static void dump_info(void)
+static int dump_info(void)
 {
+        int rc = 0;
+
         if (info_threads)
                 dump_threads();
         else if (info_map)
                 dump_map();
-        else
-                die("Unknown type of information\n");
+        else {
+                rc = -1;
+                pr_err("Unknown type of information\n");
+        }
+
+        return rc;
 }
 
-static int process_sample_event(struct perf_tool *tool __used,
+typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
+                                  struct perf_sample *sample);
+
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
                                 union perf_event *event,
                                 struct perf_sample *sample,
-                                struct perf_evsel *evsel __used,
+                                struct perf_evsel *evsel,
                                 struct machine *machine)
 {
         struct thread *thread = machine__findnew_thread(machine, sample->tid);
@@ -860,7 +815,10 @@ static int process_sample_event(struct perf_tool *tool __used,
                 return -1;
         }
 
-        process_raw_event(sample->raw_data, sample->cpu, sample->time, thread);
+        if (evsel->handler.func != NULL) {
+                tracepoint_handler f = evsel->handler.func;
+                return f(evsel, sample);
+        }
 
         return 0;
 }
@@ -871,11 +829,25 @@ static struct perf_tool eops = {
         .ordered_samples        = true,
 };
 
+static const struct perf_evsel_str_handler lock_tracepoints[] = {
+        { "lock:lock_acquire",   perf_evsel__process_lock_acquire,   }, /* CONFIG_LOCKDEP */
+        { "lock:lock_acquired",  perf_evsel__process_lock_acquired,  }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */
+        { "lock:lock_contended", perf_evsel__process_lock_contended, }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */
+        { "lock:lock_release",   perf_evsel__process_lock_release,   }, /* CONFIG_LOCKDEP */
+};
+
 static int read_events(void)
 {
         session = perf_session__new(input_name, O_RDONLY, 0, false, &eops);
-        if (!session)
-                die("Initializing perf session failed\n");
+        if (!session) {
+                pr_err("Initializing perf session failed\n");
+                return -1;
+        }
+
+        if (perf_session__set_tracepoints_handlers(session, lock_tracepoints)) {
+                pr_err("Initializing perf session tracepoint handlers failed\n");
+                return -1;
+        }
 
         return perf_session__process_events(session, &eops);
 }
@@ -892,13 +864,18 @@ static void sort_result(void)
         }
 }
 
-static void __cmd_report(void)
+static int __cmd_report(void)
 {
         setup_pager();
-        select_key();
-        read_events();
+
+        if ((select_key() != 0) ||
+            (read_events() != 0))
+                return -1;
+
         sort_result();
         print_result();
+
+        return 0;
 }
 
 static const char * const report_usage[] = {
@@ -944,10 +921,6 @@ static const char *record_args[] = {
         "-f",
         "-m", "1024",
         "-c", "1",
-        "-e", "lock:lock_acquire",
-        "-e", "lock:lock_acquired",
-        "-e", "lock:lock_contended",
-        "-e", "lock:lock_release",
 };
 
 static int __cmd_record(int argc, const char **argv)
@@ -955,15 +928,31 @@ static int __cmd_record(int argc, const char **argv)
         unsigned int rec_argc, i, j;
         const char **rec_argv;
 
+        for (i = 0; i < ARRAY_SIZE(lock_tracepoints); i++) {
+                if (!is_valid_tracepoint(lock_tracepoints[i].name)) {
+                                pr_err("tracepoint %s is not enabled. "
+                                       "Are CONFIG_LOCKDEP and CONFIG_LOCK_STAT enabled?\n",
+                                       lock_tracepoints[i].name);
+                                return 1;
+                }
+        }
+
         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
-        rec_argv = calloc(rec_argc + 1, sizeof(char *));
+        /* factor of 2 is for -e in front of each tracepoint */
+        rec_argc += 2 * ARRAY_SIZE(lock_tracepoints);
 
+        rec_argv = calloc(rec_argc + 1, sizeof(char *));
         if (rec_argv == NULL)
                 return -ENOMEM;
 
         for (i = 0; i < ARRAY_SIZE(record_args); i++)
                 rec_argv[i] = strdup(record_args[i]);
 
+        for (j = 0; j < ARRAY_SIZE(lock_tracepoints); j++) {
+                rec_argv[i++] = "-e";
+                rec_argv[i++] = strdup(lock_tracepoints[j].name);
+        }
+
         for (j = 1; j < (unsigned int)argc; j++, i++)
                 rec_argv[i] = argv[j];
 
@@ -972,9 +961,10 @@ static int __cmd_record(int argc, const char **argv)
         return cmd_record(i, rec_argv, NULL);
 }
 
-int cmd_lock(int argc, const char **argv, const char *prefix __used)
+int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         unsigned int i;
+        int rc = 0;
 
         symbol__init();
         for (i = 0; i < LOCKHASH_SIZE; i++)
@@ -1009,11 +999,13 @@ int cmd_lock(int argc, const char **argv, const char *prefix __used)
                 /* recycling report_lock_ops */
                 trace_handler = &report_lock_ops;
                 setup_pager();
-                read_events();
-                dump_info();
+                if (read_events() != 0)
+                        rc = -1;
+                else
+                        rc = dump_info();
         } else {
                 usage_with_options(lock_usage, lock_options);
         }
 
-        return 0;
+        return rc;
 }
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index e215ae61b2ae..118aa8946573 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -143,8 +143,8 @@ static int parse_probe_event_argv(int argc, const char **argv)
         return ret;
 }
 
-static int opt_add_probe_event(const struct option *opt __used,
-                              const char *str, int unset __used)
+static int opt_add_probe_event(const struct option *opt __maybe_unused,
+                              const char *str, int unset __maybe_unused)
 {
         if (str) {
                 params.mod_events = true;
@@ -153,8 +153,8 @@ static int opt_add_probe_event(const struct option *opt __used,
                 return 0;
 }
 
-static int opt_del_probe_event(const struct option *opt __used,
-                               const char *str, int unset __used)
+static int opt_del_probe_event(const struct option *opt __maybe_unused,
+                               const char *str, int unset __maybe_unused)
 {
         if (str) {
                 params.mod_events = true;
@@ -166,7 +166,7 @@ static int opt_del_probe_event(const struct option *opt __used,
 }
 
 static int opt_set_target(const struct option *opt, const char *str,
-                        int unset __used)
+                        int unset __maybe_unused)
 {
         int ret = -ENOENT;
 
@@ -188,8 +188,8 @@ static int opt_set_target(const struct option *opt, const char *str,
 }
 
 #ifdef DWARF_SUPPORT
-static int opt_show_lines(const struct option *opt __used,
-                          const char *str, int unset __used)
+static int opt_show_lines(const struct option *opt __maybe_unused,
+                          const char *str, int unset __maybe_unused)
 {
         int ret = 0;
 
@@ -209,8 +209,8 @@ static int opt_show_lines(const struct option *opt __used,
         return ret;
 }
 
-static int opt_show_vars(const struct option *opt __used,
-                         const char *str, int unset __used)
+static int opt_show_vars(const struct option *opt __maybe_unused,
+                         const char *str, int unset __maybe_unused)
 {
         struct perf_probe_event *pev = &params.events[params.nevents];
         int ret;
@@ -229,8 +229,8 @@ static int opt_show_vars(const struct option *opt __used,
 }
 #endif
 
-static int opt_set_filter(const struct option *opt __used,
-                          const char *str, int unset __used)
+static int opt_set_filter(const struct option *opt __maybe_unused,
+                          const char *str, int unset __maybe_unused)
 {
         const char *err;
 
@@ -327,7 +327,7 @@ static const struct option options[] = {
         OPT_END()
 };
 
-int cmd_probe(int argc, const char **argv, const char *prefix __used)
+int cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         int ret;
 
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 4db6e1ba54e3..f14cb5fdb91f 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -31,6 +31,15 @@
 #include <sched.h>
 #include <sys/mman.h>
 
+#define CALLCHAIN_HELP "do call-graph (stack chain/backtrace) recording: "
+
+#ifdef NO_LIBUNWIND_SUPPORT
+static char callchain_help[] = CALLCHAIN_HELP "[fp]";
+#else
+static unsigned long default_stack_dump_size = 8192;
+static char callchain_help[] = CALLCHAIN_HELP "[fp] dwarf";
+#endif
+
 enum write_mode_t {
         WRITE_FORCE,
         WRITE_APPEND
@@ -62,32 +71,38 @@ static void advance_output(struct perf_record *rec, size_t size)
         rec->bytes_written += size;
 }
 
-static void write_output(struct perf_record *rec, void *buf, size_t size)
+static int write_output(struct perf_record *rec, void *buf, size_t size)
 {
         while (size) {
                 int ret = write(rec->output, buf, size);
 
-                if (ret < 0)
-                        die("failed to write");
+                if (ret < 0) {
+                        pr_err("failed to write\n");
+                        return -1;
+                }
 
                 size -= ret;
                 buf += ret;
 
                 rec->bytes_written += ret;
         }
+
+        return 0;
 }
 
 static int process_synthesized_event(struct perf_tool *tool,
                                      union perf_event *event,
-                                     struct perf_sample *sample __used,
-                                     struct machine *machine __used)
+                                     struct perf_sample *sample __maybe_unused,
+                                     struct machine *machine __maybe_unused)
 {
         struct perf_record *rec = container_of(tool, struct perf_record, tool);
-        write_output(rec, event, event->header.size);
+        if (write_output(rec, event, event->header.size) < 0)
+                return -1;
+
         return 0;
 }
 
-static void perf_record__mmap_read(struct perf_record *rec,
+static int perf_record__mmap_read(struct perf_record *rec,
                                    struct perf_mmap *md)
 {
         unsigned int head = perf_mmap__read_head(md);
@@ -95,9 +110,10 @@ static void perf_record__mmap_read(struct perf_record *rec,
         unsigned char *data = md->base + rec->page_size;
         unsigned long size;
         void *buf;
+        int rc = 0;
 
         if (old == head)
-                return;
+                return 0;
 
         rec->samples++;
 
@@ -108,17 +124,26 @@ static void perf_record__mmap_read(struct perf_record *rec,
                 size = md->mask + 1 - (old & md->mask);
                 old += size;
 
-                write_output(rec, buf, size);
+                if (write_output(rec, buf, size) < 0) {
+                        rc = -1;
+                        goto out;
+                }
         }
 
         buf = &data[old & md->mask];
         size = head - old;
         old += size;
 
-        write_output(rec, buf, size);
+        if (write_output(rec, buf, size) < 0) {
+                rc = -1;
+                goto out;
+        }
 
         md->prev = old;
         perf_mmap__write_tail(md, old);
+
+out:
+        return rc;
 }
 
 static volatile int done = 0;
@@ -134,7 +159,7 @@ static void sig_handler(int sig)
         signr = sig;
 }
 
-static void perf_record__sig_exit(int exit_status __used, void *arg)
+static void perf_record__sig_exit(int exit_status __maybe_unused, void *arg)
 {
         struct perf_record *rec = arg;
         int status;
@@ -163,31 +188,32 @@ static bool perf_evlist__equal(struct perf_evlist *evlist,
         if (evlist->nr_entries != other->nr_entries)
                 return false;
 
-        pair = list_entry(other->entries.next, struct perf_evsel, node);
+        pair = perf_evlist__first(other);
 
         list_for_each_entry(pos, &evlist->entries, node) {
                 if (memcmp(&pos->attr, &pair->attr, sizeof(pos->attr) != 0))
                         return false;
-                pair = list_entry(pair->node.next, struct perf_evsel, node);
+                pair = perf_evsel__next(pair);
         }
 
         return true;
 }
 
-static void perf_record__open(struct perf_record *rec)
+static int perf_record__open(struct perf_record *rec)
 {
-        struct perf_evsel *pos, *first;
+        struct perf_evsel *pos;
         struct perf_evlist *evlist = rec->evlist;
         struct perf_session *session = rec->session;
         struct perf_record_opts *opts = &rec->opts;
-
-        first = list_entry(evlist->entries.next, struct perf_evsel, node);
+        int rc = 0;
 
         perf_evlist__config_attrs(evlist, opts);
 
+        if (opts->group)
+                perf_evlist__set_leader(evlist);
+
         list_for_each_entry(pos, &evlist->entries, node) {
                 struct perf_event_attr *attr = &pos->attr;
-                struct xyarray *group_fd = NULL;
                 /*
                  * Check if parse_single_tracepoint_event has already asked for
                  * PERF_SAMPLE_TIME.
@@ -202,24 +228,24 @@ static void perf_record__open(struct perf_record *rec)
                  */
                 bool time_needed = attr->sample_type & PERF_SAMPLE_TIME;
 
-                if (opts->group && pos != first)
-                        group_fd = first->fd;
 fallback_missing_features:
                 if (opts->exclude_guest_missing)
                         attr->exclude_guest = attr->exclude_host = 0;
 retry_sample_id:
                 attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1;
 try_again:
-                if (perf_evsel__open(pos, evlist->cpus, evlist->threads,
-                                     opts->group, group_fd) < 0) {
+                if (perf_evsel__open(pos, evlist->cpus, evlist->threads) < 0) {
                         int err = errno;
 
                         if (err == EPERM || err == EACCES) {
                                 ui__error_paranoid();
-                                exit(EXIT_FAILURE);
+                                rc = -err;
+                                goto out;
                         } else if (err ==  ENODEV && opts->target.cpu_list) {
-                                die("No such device - did you specify"
-                                        " an out-of-range profile CPU?\n");
+                                pr_err("No such device - did you specify"
+                                       " an out-of-range profile CPU?\n");
+                                rc = -err;
+                                goto out;
                         } else if (err == EINVAL) {
                                 if (!opts->exclude_guest_missing &&
                                     (attr->exclude_guest || attr->exclude_host)) {
@@ -266,42 +292,57 @@ try_again:
                         if (err == ENOENT) {
                                 ui__error("The %s event is not supported.\n",
                                           perf_evsel__name(pos));
-                                exit(EXIT_FAILURE);
+                                rc = -err;
+                                goto out;
                         }
 
                         printf("\n");
-                        error("sys_perf_event_open() syscall returned with %d (%s).  /bin/dmesg may provide additional information.\n",
-                              err, strerror(err));
+                        error("sys_perf_event_open() syscall returned with %d "
+                              "(%s) for event %s. /bin/dmesg may provide "
+                              "additional information.\n",
+                              err, strerror(err), perf_evsel__name(pos));
 
 #if defined(__i386__) || defined(__x86_64__)
-                        if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP)
-                                die("No hardware sampling interrupt available."
-                                    " No APIC? If so then you can boot the kernel"
-                                    " with the \"lapic\" boot parameter to"
-                                    " force-enable it.\n");
+                        if (attr->type == PERF_TYPE_HARDWARE &&
+                            err == EOPNOTSUPP) {
+                                pr_err("No hardware sampling interrupt available."
+                                       " No APIC? If so then you can boot the kernel"
+                                       " with the \"lapic\" boot parameter to"
+                                       " force-enable it.\n");
+                                rc = -err;
+                                goto out;
+                        }
 #endif
 
-                        die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
+                        pr_err("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
+                        rc = -err;
+                        goto out;
                 }
         }
 
-        if (perf_evlist__set_filters(evlist)) {
+        if (perf_evlist__apply_filters(evlist)) {
                 error("failed to set filter with %d (%s)\n", errno,
                         strerror(errno));
-                exit(-1);
+                rc = -1;
+                goto out;
         }
 
         if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
-                if (errno == EPERM)
-                        die("Permission error mapping pages.\n"
-                            "Consider increasing "
-                            "/proc/sys/kernel/perf_event_mlock_kb,\n"
-                            "or try again with a smaller value of -m/--mmap_pages.\n"
-                            "(current value: %d)\n", opts->mmap_pages);
-                else if (!is_power_of_2(opts->mmap_pages))
-                        die("--mmap_pages/-m value must be a power of two.");
-
-                die("failed to mmap with %d (%s)\n", errno, strerror(errno));
+                if (errno == EPERM) {
+                        pr_err("Permission error mapping pages.\n"
+                               "Consider increasing "
+                               "/proc/sys/kernel/perf_event_mlock_kb,\n"
+                               "or try again with a smaller value of -m/--mmap_pages.\n"
+                               "(current value: %d)\n", opts->mmap_pages);
+                        rc = -errno;
+                } else if (!is_power_of_2(opts->mmap_pages)) {
+                        pr_err("--mmap_pages/-m value must be a power of two.");
+                        rc = -EINVAL;
+                } else {
+                        pr_err("failed to mmap with %d (%s)\n", errno, strerror(errno));
+                        rc = -errno;
+                }
+                goto out;
         }
 
         if (rec->file_new)
@@ -309,11 +350,14 @@ try_again:
         else {
                 if (!perf_evlist__equal(session->evlist, evlist)) {
                         fprintf(stderr, "incompatible append\n");
-                        exit(-1);
+                        rc = -1;
+                        goto out;
                 }
         }
 
         perf_session__set_id_hdr_size(session);
+out:
+        return rc;
 }
 
 static int process_buildids(struct perf_record *rec)
@@ -329,10 +373,13 @@ static int process_buildids(struct perf_record *rec)
                                               size, &build_id__mark_dso_hit_ops);
 }
 
-static void perf_record__exit(int status __used, void *arg)
+static void perf_record__exit(int status, void *arg)
 {
         struct perf_record *rec = arg;
 
+        if (status != 0)
+                return;
+
         if (!rec->opts.pipe_output) {
                 rec->session->header.data_size += rec->bytes_written;
 
@@ -387,17 +434,26 @@ static struct perf_event_header finished_round_event = {
         .type = PERF_RECORD_FINISHED_ROUND,
 };
 
-static void perf_record__mmap_read_all(struct perf_record *rec)
+static int perf_record__mmap_read_all(struct perf_record *rec)
 {
         int i;
+        int rc = 0;
 
         for (i = 0; i < rec->evlist->nr_mmaps; i++) {
-                if (rec->evlist->mmap[i].base)
-                        perf_record__mmap_read(rec, &rec->evlist->mmap[i]);
+                if (rec->evlist->mmap[i].base) {
+                        if (perf_record__mmap_read(rec, &rec->evlist->mmap[i]) != 0) {
+                                rc = -1;
+                                goto out;
+                        }
+                }
         }
 
         if (perf_header__has_feat(&rec->session->header, HEADER_TRACING_DATA))
-                write_output(rec, &finished_round_event, sizeof(finished_round_event));
+                rc = write_output(rec, &finished_round_event,
+                                  sizeof(finished_round_event));
+
+out:
+        return rc;
 }
 
 static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
@@ -457,7 +513,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
                 output = open(output_name, flags, S_IRUSR | S_IWUSR);
         if (output < 0) {
                 perror("failed to create output file");
-                exit(-1);
+                return -1;
         }
 
         rec->output = output;
@@ -497,7 +553,10 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
                 }
         }
 
-        perf_record__open(rec);
+        if (perf_record__open(rec) != 0) {
+                err = -1;
+                goto out_delete_session;
+        }
 
         /*
          * perf_session__delete(session) will be called at perf_record__exit()
@@ -507,19 +566,20 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
         if (opts->pipe_output) {
                 err = perf_header__write_pipe(output);
                 if (err < 0)
-                        return err;
+                        goto out_delete_session;
         } else if (rec->file_new) {
                 err = perf_session__write_header(session, evsel_list,
                                                  output, false);
                 if (err < 0)
-                        return err;
+                        goto out_delete_session;
         }
 
         if (!rec->no_buildid
             && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
                 pr_err("Couldn't generate buildids. "
                        "Use --no-buildid to profile anyway.\n");
-                return -1;
+                err = -1;
+                goto out_delete_session;
         }
 
         rec->post_processing_offset = lseek(output, 0, SEEK_CUR);
@@ -527,7 +587,8 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
         machine = perf_session__find_host_machine(session);
         if (!machine) {
                 pr_err("Couldn't find native kernel information.\n");
-                return -1;
+                err = -1;
+                goto out_delete_session;
         }
 
         if (opts->pipe_output) {
@@ -535,14 +596,14 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
                                                    process_synthesized_event);
                 if (err < 0) {
                         pr_err("Couldn't synthesize attrs.\n");
-                        return err;
+                        goto out_delete_session;
                 }
 
                 err = perf_event__synthesize_event_types(tool, process_synthesized_event,
                                                          machine);
                 if (err < 0) {
                         pr_err("Couldn't synthesize event_types.\n");
-                        return err;
+                        goto out_delete_session;
                 }
 
                 if (have_tracepoints(&evsel_list->entries)) {
@@ -558,7 +619,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
                                                                   process_synthesized_event);
                         if (err <= 0) {
                                 pr_err("Couldn't record tracing data.\n");
-                                return err;
+                                goto out_delete_session;
                         }
                         advance_output(rec, err);
                 }
@@ -586,20 +647,24 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
                                                perf_event__synthesize_guest_os);
 
         if (!opts->target.system_wide)
-                perf_event__synthesize_thread_map(tool, evsel_list->threads,
+                err = perf_event__synthesize_thread_map(tool, evsel_list->threads,
                                                   process_synthesized_event,
                                                   machine);
         else
-                perf_event__synthesize_threads(tool, process_synthesized_event,
+                err = perf_event__synthesize_threads(tool, process_synthesized_event,
                                                machine);
 
+        if (err != 0)
+                goto out_delete_session;
+
         if (rec->realtime_prio) {
                 struct sched_param param;
 
                 param.sched_priority = rec->realtime_prio;
                 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
                         pr_err("Could not set realtime priority.\n");
-                        exit(-1);
+                        err = -1;
+                        goto out_delete_session;
                 }
         }
 
@@ -614,7 +679,10 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
         for (;;) {
                 int hits = rec->samples;
 
-                perf_record__mmap_read_all(rec);
+                if (perf_record__mmap_read_all(rec) < 0) {
+                        err = -1;
+                        goto out_delete_session;
+                }
 
                 if (hits == rec->samples) {
                         if (done)
@@ -732,6 +800,106 @@ error:
         return ret;
 }
 
+#ifndef NO_LIBUNWIND_SUPPORT
+static int get_stack_size(char *str, unsigned long *_size)
+{
+        char *endptr;
+        unsigned long size;
+        unsigned long max_size = round_down(USHRT_MAX, sizeof(u64));
+
+        size = strtoul(str, &endptr, 0);
+
+        do {
+                if (*endptr)
+                        break;
+
+                size = round_up(size, sizeof(u64));
+                if (!size || size > max_size)
+                        break;
+
+                *_size = size;
+                return 0;
+
+        } while (0);
+
+        pr_err("callchain: Incorrect stack dump size (max %ld): %s\n",
+               max_size, str);
+        return -1;
+}
+#endif /* !NO_LIBUNWIND_SUPPORT */
+
+static int
+parse_callchain_opt(const struct option *opt __maybe_unused, const char *arg,
+                    int unset)
+{
+        struct perf_record *rec = (struct perf_record *)opt->value;
+        char *tok, *name, *saveptr = NULL;
+        char *buf;
+        int ret = -1;
+
+        /* --no-call-graph */
+        if (unset)
+                return 0;
+
+        /* We specified default option if none is provided. */
+        BUG_ON(!arg);
+
+        /* We need buffer that we know we can write to. */
+        buf = malloc(strlen(arg) + 1);
+        if (!buf)
+                return -ENOMEM;
+
+        strcpy(buf, arg);
+
+        tok = strtok_r((char *)buf, ",", &saveptr);
+        name = tok ? : (char *)buf;
+
+        do {
+                /* Framepointer style */
+                if (!strncmp(name, "fp", sizeof("fp"))) {
+                        if (!strtok_r(NULL, ",", &saveptr)) {
+                                rec->opts.call_graph = CALLCHAIN_FP;
+                                ret = 0;
+                        } else
+                                pr_err("callchain: No more arguments "
+                                       "needed for -g fp\n");
+                        break;
+
+#ifndef NO_LIBUNWIND_SUPPORT
+                /* Dwarf style */
+                } else if (!strncmp(name, "dwarf", sizeof("dwarf"))) {
+                        ret = 0;
+                        rec->opts.call_graph = CALLCHAIN_DWARF;
+                        rec->opts.stack_dump_size = default_stack_dump_size;
+
+                        tok = strtok_r(NULL, ",", &saveptr);
+                        if (tok) {
+                                unsigned long size = 0;
+
+                                ret = get_stack_size(tok, &size);
+                                rec->opts.stack_dump_size = size;
+                        }
+
+                        if (!ret)
+                                pr_debug("callchain: stack dump size %d\n",
+                                         rec->opts.stack_dump_size);
+#endif /* !NO_LIBUNWIND_SUPPORT */
+                } else {
+                        pr_err("callchain: Unknown -g option "
+                               "value: %s\n", arg);
+                        break;
+                }
+
+        } while (0);
+
+        free(buf);
+
+        if (!ret)
+                pr_debug("callchain: type %d\n", rec->opts.call_graph);
+
+        return ret;
+}
+
 static const char * const record_usage[] = {
         "perf record [<options>] [<command>]",
         "perf record [<options>] -- <command> [<options>]",
@@ -803,8 +971,9 @@ const struct option record_options[] = {
                      "number of mmap data pages"),
         OPT_BOOLEAN(0, "group", &record.opts.group,
                     "put the counters into a counter group"),
-        OPT_BOOLEAN('g', "call-graph", &record.opts.call_graph,
-                    "do call-graph (stack chain/backtrace) recording"),
+        OPT_CALLBACK_DEFAULT('g', "call-graph", &record, "mode[,dump_size]",
+                             callchain_help, &parse_callchain_opt,
+                             "fp"),
         OPT_INCR('v', "verbose", &verbose,
                     "be more verbose (show counter open errors, etc)"),
         OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
@@ -836,7 +1005,7 @@ const struct option record_options[] = {
         OPT_END()
 };
 
-int cmd_record(int argc, const char **argv, const char *prefix __used)
+int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         int err = -ENOMEM;
         struct perf_evsel *pos;
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 7c88a243b5db..1da243dfbc3e 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -69,8 +69,8 @@ static int perf_report__add_branch_hist_entry(struct perf_tool *tool,
 
         if ((sort__has_parent || symbol_conf.use_callchain)
             && sample->callchain) {
-                err = machine__resolve_callchain(machine, al->thread,
-                                                 sample->callchain, &parent);
+                err = machine__resolve_callchain(machine, evsel, al->thread,
+                                                 sample, &parent);
                 if (err)
                         return err;
         }
@@ -93,7 +93,7 @@ static int perf_report__add_branch_hist_entry(struct perf_tool *tool,
                         struct annotation *notes;
                         err = -ENOMEM;
                         bx = he->branch_info;
-                        if (bx->from.sym && use_browser > 0) {
+                        if (bx->from.sym && use_browser == 1 && sort__has_sym) {
                                 notes = symbol__annotation(bx->from.sym);
                                 if (!notes->src
                                     && symbol__alloc_hist(bx->from.sym) < 0)
@@ -107,7 +107,7 @@ static int perf_report__add_branch_hist_entry(struct perf_tool *tool,
                                         goto out;
                         }
 
-                        if (bx->to.sym && use_browser > 0) {
+                        if (bx->to.sym && use_browser == 1 && sort__has_sym) {
                                 notes = symbol__annotation(bx->to.sym);
                                 if (!notes->src
                                     && symbol__alloc_hist(bx->to.sym) < 0)
@@ -140,8 +140,8 @@ static int perf_evsel__add_hist_entry(struct perf_evsel *evsel,
         struct hist_entry *he;
 
         if ((sort__has_parent || symbol_conf.use_callchain) && sample->callchain) {
-                err = machine__resolve_callchain(machine, al->thread,
-                                                 sample->callchain, &parent);
+                err = machine__resolve_callchain(machine, evsel, al->thread,
+                                                 sample, &parent);
                 if (err)
                         return err;
         }
@@ -162,7 +162,7 @@ static int perf_evsel__add_hist_entry(struct perf_evsel *evsel,
          * so we don't allocated the extra space needed because the stdio
          * code will not use it.
          */
-        if (he->ms.sym != NULL && use_browser > 0) {
+        if (he->ms.sym != NULL && use_browser == 1 && sort__has_sym) {
                 struct annotation *notes = symbol__annotation(he->ms.sym);
 
                 assert(evsel != NULL);
@@ -223,9 +223,9 @@ static int process_sample_event(struct perf_tool *tool,
 
 static int process_read_event(struct perf_tool *tool,
                               union perf_event *event,
-                              struct perf_sample *sample __used,
+                              struct perf_sample *sample __maybe_unused,
                               struct perf_evsel *evsel,
-                              struct machine *machine __used)
+                              struct machine *machine __maybe_unused)
 {
         struct perf_report *rep = container_of(tool, struct perf_report, tool);
 
@@ -287,7 +287,7 @@ static int perf_report__setup_sample_type(struct perf_report *rep)
 
 extern volatile int session_done;
 
-static void sig_handler(int sig __used)
+static void sig_handler(int sig __maybe_unused)
 {
         session_done = 1;
 }
@@ -397,17 +397,17 @@ static int __cmd_report(struct perf_report *rep)
                 desc);
         }
 
-        if (dump_trace) {
-                perf_session__fprintf_nr_events(session, stdout);
-                goto out_delete;
-        }
-
         if (verbose > 3)
                 perf_session__fprintf(session, stdout);
 
         if (verbose > 2)
                 perf_session__fprintf_dsos(session, stdout);
 
+        if (dump_trace) {
+                perf_session__fprintf_nr_events(session, stdout);
+                goto out_delete;
+        }
+
         nr_samples = 0;
         list_for_each_entry(pos, &session->evlist->entries, node) {
                 struct hists *hists = &pos->hists;
@@ -533,13 +533,14 @@ setup:
 }
 
 static int
-parse_branch_mode(const struct option *opt __used, const char *str __used, int unset)
+parse_branch_mode(const struct option *opt __maybe_unused,
+                  const char *str __maybe_unused, int unset)
 {
         sort__branch_mode = !unset;
         return 0;
 }
 
-int cmd_report(int argc, const char **argv, const char *prefix __used)
+int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         struct perf_session *session;
         struct stat st;
@@ -638,6 +639,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
                     "Show a column with the sum of periods"),
         OPT_CALLBACK_NOOPT('b', "branch-stack", &sort__branch_mode, "",
                     "use branch records for histogram filling", parse_branch_mode),
+        OPT_STRING(0, "objdump", &objdump_path, "path",
+                   "objdump binary to use for disassembly and annotations"),
         OPT_END()
         };
 
@@ -686,15 +689,19 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
 
         if (strcmp(report.input_name, "-") != 0)
                 setup_browser(true);
-        else
+        else {
                 use_browser = 0;
+                perf_hpp__init(false, false);
+        }
+
+        setup_sorting(report_usage, options);
 
         /*
          * Only in the newt browser we are doing integrated annotation,
          * so don't allocate extra space that won't be used in the stdio
          * implementation.
          */
-        if (use_browser > 0) {
+        if (use_browser == 1 && sort__has_sym) {
                 symbol_conf.priv_size = sizeof(struct annotation);
                 report.annotate_init  = symbol__annotate_init;
                 /*
@@ -717,8 +724,6 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
         if (symbol__init() < 0)
                 goto error;
 
-        setup_sorting(report_usage, options);
-
         if (parent_pattern != default_parent_pattern) {
                 if (sort_dimension__add("parent") < 0)
                         goto error;
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 7a9ad2b1ee76..9b9e32eaa805 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -23,31 +23,12 @@
 #include <pthread.h>
 #include <math.h>
 
-static const char               *input_name;
-
-static char                     default_sort_order[] = "avg, max, switch, runtime";
-static const char               *sort_order = default_sort_order;
-
-static int                      profile_cpu = -1;
-
 #define PR_SET_NAME             15               /* Set process name */
 #define MAX_CPUS                4096
-
-static u64                      run_measurement_overhead;
-static u64                      sleep_measurement_overhead;
-
 #define COMM_LEN                20
 #define SYM_LEN                 129
-
 #define MAX_PID                 65536
 
-static unsigned long            nr_tasks;
-
-struct perf_sched {
-        struct perf_tool    tool;
-        struct perf_session *session;
-};
-
 struct sched_atom;
 
 struct task_desc {
@@ -85,44 +66,6 @@ struct sched_atom {
         struct task_desc        *wakee;
 };
 
-static struct task_desc         *pid_to_task[MAX_PID];
-
-static struct task_desc         **tasks;
-
-static pthread_mutex_t          start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
-static u64                      start_time;
-
-static pthread_mutex_t          work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-static unsigned long            nr_run_events;
-static unsigned long            nr_sleep_events;
-static unsigned long            nr_wakeup_events;
-
-static unsigned long            nr_sleep_corrections;
-static unsigned long            nr_run_events_optimized;
-
-static unsigned long            targetless_wakeups;
-static unsigned long            multitarget_wakeups;
-
-static u64                      cpu_usage;
-static u64                      runavg_cpu_usage;
-static u64                      parent_cpu_usage;
-static u64                      runavg_parent_cpu_usage;
-
-static unsigned long            nr_runs;
-static u64                      sum_runtime;
-static u64                      sum_fluct;
-static u64                      run_avg;
-
-static unsigned int             replay_repeat = 10;
-static unsigned long            nr_timestamps;
-static unsigned long            nr_unordered_timestamps;
-static unsigned long            nr_state_machine_bugs;
-static unsigned long            nr_context_switch_bugs;
-static unsigned long            nr_events;
-static unsigned long            nr_lost_chunks;
-static unsigned long            nr_lost_events;
-
 #define TASK_STATE_TO_CHAR_STR "RSDTtZX"
 
 enum thread_state {
@@ -154,11 +97,79 @@ struct work_atoms {
 
 typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
 
-static struct rb_root           atom_root, sorted_atom_root;
+struct perf_sched;
+
+struct trace_sched_handler {
+        int (*switch_event)(struct perf_sched *sched, struct perf_evsel *evsel,
+                            struct perf_sample *sample, struct machine *machine);
 
-static u64                      all_runtime;
-static u64                      all_count;
+        int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel,
+                             struct perf_sample *sample, struct machine *machine);
 
+        int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel,
+                            struct perf_sample *sample, struct machine *machine);
+
+        int (*fork_event)(struct perf_sched *sched, struct perf_evsel *evsel,
+                          struct perf_sample *sample);
+
+        int (*migrate_task_event)(struct perf_sched *sched,
+                                  struct perf_evsel *evsel,
+                                  struct perf_sample *sample,
+                                  struct machine *machine);
+};
+
+struct perf_sched {
+        struct perf_tool tool;
+        const char       *input_name;
+        const char       *sort_order;
+        unsigned long    nr_tasks;
+        struct task_desc *pid_to_task[MAX_PID];
+        struct task_desc **tasks;
+        const struct trace_sched_handler *tp_handler;
+        pthread_mutex_t  start_work_mutex;
+        pthread_mutex_t  work_done_wait_mutex;
+        int              profile_cpu;
+/*
+ * Track the current task - that way we can know whether there's any
+ * weird events, such as a task being switched away that is not current.
+ */
+        int              max_cpu;
+        u32              curr_pid[MAX_CPUS];
+        struct thread    *curr_thread[MAX_CPUS];
+        char             next_shortname1;
+        char             next_shortname2;
+        unsigned int     replay_repeat;
+        unsigned long    nr_run_events;
+        unsigned long    nr_sleep_events;
+        unsigned long    nr_wakeup_events;
+        unsigned long    nr_sleep_corrections;
+        unsigned long    nr_run_events_optimized;
+        unsigned long    targetless_wakeups;
+        unsigned long    multitarget_wakeups;
+        unsigned long    nr_runs;
+        unsigned long    nr_timestamps;
+        unsigned long    nr_unordered_timestamps;
+        unsigned long    nr_state_machine_bugs;
+        unsigned long    nr_context_switch_bugs;
+        unsigned long    nr_events;
+        unsigned long    nr_lost_chunks;
+        unsigned long    nr_lost_events;
+        u64              run_measurement_overhead;
+        u64              sleep_measurement_overhead;
+        u64              start_time;
+        u64              cpu_usage;
+        u64              runavg_cpu_usage;
+        u64              parent_cpu_usage;
+        u64              runavg_parent_cpu_usage;
+        u64              sum_runtime;
+        u64              sum_fluct;
+        u64              run_avg;
+        u64              all_runtime;
+        u64              all_count;
+        u64              cpu_last_switched[MAX_CPUS];
+        struct rb_root   atom_root, sorted_atom_root;
+        struct list_head sort_list, cmp_pid;
+};
 
 static u64 get_nsecs(void)
 {
@@ -169,13 +180,13 @@ static u64 get_nsecs(void)
         return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
 }
 
-static void burn_nsecs(u64 nsecs)
+static void burn_nsecs(struct perf_sched *sched, u64 nsecs)
 {
         u64 T0 = get_nsecs(), T1;
 
         do {
                 T1 = get_nsecs();
-        } while (T1 + run_measurement_overhead < T0 + nsecs);
+        } while (T1 + sched->run_measurement_overhead < T0 + nsecs);
 }
 
 static void sleep_nsecs(u64 nsecs)
@@ -188,24 +199,24 @@ static void sleep_nsecs(u64 nsecs)
         nanosleep(&ts, NULL);
 }
 
-static void calibrate_run_measurement_overhead(void)
+static void calibrate_run_measurement_overhead(struct perf_sched *sched)
 {
         u64 T0, T1, delta, min_delta = 1000000000ULL;
         int i;
 
         for (i = 0; i < 10; i++) {
                 T0 = get_nsecs();
-                burn_nsecs(0);
+                burn_nsecs(sched, 0);
                 T1 = get_nsecs();
                 delta = T1-T0;
                 min_delta = min(min_delta, delta);
         }
-        run_measurement_overhead = min_delta;
+        sched->run_measurement_overhead = min_delta;
 
         printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta);
 }
 
-static void calibrate_sleep_measurement_overhead(void)
+static void calibrate_sleep_measurement_overhead(struct perf_sched *sched)
 {
         u64 T0, T1, delta, min_delta = 1000000000ULL;
         int i;
@@ -218,7 +229,7 @@ static void calibrate_sleep_measurement_overhead(void)
                 min_delta = min(min_delta, delta);
         }
         min_delta -= 10000;
-        sleep_measurement_overhead = min_delta;
+        sched->sleep_measurement_overhead = min_delta;
 
         printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta);
 }
@@ -251,8 +262,8 @@ static struct sched_atom *last_event(struct task_desc *task)
         return task->atoms[task->nr_events - 1];
 }
 
-static void
-add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration)
+static void add_sched_event_run(struct perf_sched *sched, struct task_desc *task,
+                                u64 timestamp, u64 duration)
 {
         struct sched_atom *event, *curr_event = last_event(task);
 
@@ -261,7 +272,7 @@ add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration)
          * to it:
          */
         if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
-                nr_run_events_optimized++;
+                sched->nr_run_events_optimized++;
                 curr_event->duration += duration;
                 return;
         }
@@ -271,12 +282,11 @@ add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration)
         event->type = SCHED_EVENT_RUN;
         event->duration = duration;
 
-        nr_run_events++;
+        sched->nr_run_events++;
 }
 
-static void
-add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
-                       struct task_desc *wakee)
+static void add_sched_event_wakeup(struct perf_sched *sched, struct task_desc *task,
+                                   u64 timestamp, struct task_desc *wakee)
 {
         struct sched_atom *event, *wakee_event;
 
@@ -286,11 +296,11 @@ add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
 
         wakee_event = last_event(wakee);
         if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
-                targetless_wakeups++;
+                sched->targetless_wakeups++;
                 return;
         }
         if (wakee_event->wait_sem) {
-                multitarget_wakeups++;
+                sched->multitarget_wakeups++;
                 return;
         }
 
@@ -299,89 +309,89 @@ add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
         wakee_event->specific_wait = 1;
         event->wait_sem = wakee_event->wait_sem;
 
-        nr_wakeup_events++;
+        sched->nr_wakeup_events++;
 }
 
-static void
-add_sched_event_sleep(struct task_desc *task, u64 timestamp,
-                      u64 task_state __used)
+static void add_sched_event_sleep(struct perf_sched *sched, struct task_desc *task,
+                                  u64 timestamp, u64 task_state __maybe_unused)
 {
         struct sched_atom *event = get_new_event(task, timestamp);
 
         event->type = SCHED_EVENT_SLEEP;
 
-        nr_sleep_events++;
+        sched->nr_sleep_events++;
 }
 
-static struct task_desc *register_pid(unsigned long pid, const char *comm)
+static struct task_desc *register_pid(struct perf_sched *sched,
+                                      unsigned long pid, const char *comm)
 {
         struct task_desc *task;
 
         BUG_ON(pid >= MAX_PID);
 
-        task = pid_to_task[pid];
+        task = sched->pid_to_task[pid];
 
         if (task)
                 return task;
 
         task = zalloc(sizeof(*task));
         task->pid = pid;
-        task->nr = nr_tasks;
+        task->nr = sched->nr_tasks;
         strcpy(task->comm, comm);
         /*
          * every task starts in sleeping state - this gets ignored
          * if there's no wakeup pointing to this sleep state:
          */
-        add_sched_event_sleep(task, 0, 0);
+        add_sched_event_sleep(sched, task, 0, 0);
 
-        pid_to_task[pid] = task;
-        nr_tasks++;
-        tasks = realloc(tasks, nr_tasks*sizeof(struct task_task *));
-        BUG_ON(!tasks);
-        tasks[task->nr] = task;
+        sched->pid_to_task[pid] = task;
+        sched->nr_tasks++;
+        sched->tasks = realloc(sched->tasks, sched->nr_tasks * sizeof(struct task_task *));
+        BUG_ON(!sched->tasks);
+        sched->tasks[task->nr] = task;
 
         if (verbose)
-                printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm);
+                printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm);
 
         return task;
 }
 
 
-static void print_task_traces(void)
+static void print_task_traces(struct perf_sched *sched)
 {
         struct task_desc *task;
         unsigned long i;
 
-        for (i = 0; i < nr_tasks; i++) {
-                task = tasks[i];
+        for (i = 0; i < sched->nr_tasks; i++) {
+                task = sched->tasks[i];
                 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
                         task->nr, task->comm, task->pid, task->nr_events);
         }
 }
 
-static void add_cross_task_wakeups(void)
+static void add_cross_task_wakeups(struct perf_sched *sched)
 {
         struct task_desc *task1, *task2;
         unsigned long i, j;
 
-        for (i = 0; i < nr_tasks; i++) {
-                task1 = tasks[i];
+        for (i = 0; i < sched->nr_tasks; i++) {
+                task1 = sched->tasks[i];
                 j = i + 1;
-                if (j == nr_tasks)
+                if (j == sched->nr_tasks)
                         j = 0;
-                task2 = tasks[j];
-                add_sched_event_wakeup(task1, 0, task2);
+                task2 = sched->tasks[j];
+                add_sched_event_wakeup(sched, task1, 0, task2);
         }
 }
 
-static void
-process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom)
+static void perf_sched__process_event(struct perf_sched *sched,
+                                      struct sched_atom *atom)
 {
         int ret = 0;
 
         switch (atom->type) {
                 case SCHED_EVENT_RUN:
-                        burn_nsecs(atom->duration);
+                        burn_nsecs(sched, atom->duration);
                         break;
                 case SCHED_EVENT_SLEEP:
                         if (atom->wait_sem)
@@ -428,8 +438,8 @@ static int self_open_counters(void)
         fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
 
         if (fd < 0)
-                die("Error: sys_perf_event_open() syscall returned"
-                    "with %d (%s)\n", fd, strerror(errno));
+                pr_err("Error: sys_perf_event_open() syscall returned "
+                       "with %d (%s)\n", fd, strerror(errno));
         return fd;
 }
 
@@ -444,31 +454,41 @@ static u64 get_cpu_usage_nsec_self(int fd)
         return runtime;
 }
 
+struct sched_thread_parms {
+        struct task_desc  *task;
+        struct perf_sched *sched;
+};
+
 static void *thread_func(void *ctx)
 {
-        struct task_desc *this_task = ctx;
+        struct sched_thread_parms *parms = ctx;
+        struct task_desc *this_task = parms->task;
+        struct perf_sched *sched = parms->sched;
         u64 cpu_usage_0, cpu_usage_1;
         unsigned long i, ret;
         char comm2[22];
         int fd;
 
+        free(parms);
+
         sprintf(comm2, ":%s", this_task->comm);
         prctl(PR_SET_NAME, comm2);
         fd = self_open_counters();
-
+        if (fd < 0)
+                return NULL;
 again:
         ret = sem_post(&this_task->ready_for_work);
         BUG_ON(ret);
-        ret = pthread_mutex_lock(&start_work_mutex);
+        ret = pthread_mutex_lock(&sched->start_work_mutex);
         BUG_ON(ret);
-        ret = pthread_mutex_unlock(&start_work_mutex);
+        ret = pthread_mutex_unlock(&sched->start_work_mutex);
         BUG_ON(ret);
 
         cpu_usage_0 = get_cpu_usage_nsec_self(fd);
 
         for (i = 0; i < this_task->nr_events; i++) {
                 this_task->curr_event = i;
-                process_sched_event(this_task, this_task->atoms[i]);
+                perf_sched__process_event(sched, this_task->atoms[i]);
         }
 
         cpu_usage_1 = get_cpu_usage_nsec_self(fd);
@@ -476,15 +496,15 @@ again:
         ret = sem_post(&this_task->work_done_sem);
         BUG_ON(ret);
 
-        ret = pthread_mutex_lock(&work_done_wait_mutex);
+        ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
         BUG_ON(ret);
-        ret = pthread_mutex_unlock(&work_done_wait_mutex);
+        ret = pthread_mutex_unlock(&sched->work_done_wait_mutex);
         BUG_ON(ret);
 
         goto again;
 }
 
-static void create_tasks(void)
+static void create_tasks(struct perf_sched *sched)
 {
         struct task_desc *task;
         pthread_attr_t attr;
@@ -496,128 +516,129 @@ static void create_tasks(void)
         err = pthread_attr_setstacksize(&attr,
                         (size_t) max(16 * 1024, PTHREAD_STACK_MIN));
         BUG_ON(err);
-        err = pthread_mutex_lock(&start_work_mutex);
+        err = pthread_mutex_lock(&sched->start_work_mutex);
         BUG_ON(err);
-        err = pthread_mutex_lock(&work_done_wait_mutex);
+        err = pthread_mutex_lock(&sched->work_done_wait_mutex);
         BUG_ON(err);
-        for (i = 0; i < nr_tasks; i++) {
-                task = tasks[i];
+        for (i = 0; i < sched->nr_tasks; i++) {
+                struct sched_thread_parms *parms = malloc(sizeof(*parms));
+                BUG_ON(parms == NULL);
+                parms->task = task = sched->tasks[i];
+                parms->sched = sched;
                 sem_init(&task->sleep_sem, 0, 0);
                 sem_init(&task->ready_for_work, 0, 0);
                 sem_init(&task->work_done_sem, 0, 0);
                 task->curr_event = 0;
-                err = pthread_create(&task->thread, &attr, thread_func, task);
+                err = pthread_create(&task->thread, &attr, thread_func, parms);
                 BUG_ON(err);
         }
 }
 
-static void wait_for_tasks(void)
+static void wait_for_tasks(struct perf_sched *sched)
 {
         u64 cpu_usage_0, cpu_usage_1;
         struct task_desc *task;
         unsigned long i, ret;
 
-        start_time = get_nsecs();
-        cpu_usage = 0;
-        pthread_mutex_unlock(&work_done_wait_mutex);
+        sched->start_time = get_nsecs();
+        sched->cpu_usage = 0;
+        pthread_mutex_unlock(&sched->work_done_wait_mutex);
 
-        for (i = 0; i < nr_tasks; i++) {
-                task = tasks[i];
+        for (i = 0; i < sched->nr_tasks; i++) {
+                task = sched->tasks[i];
                 ret = sem_wait(&task->ready_for_work);
                 BUG_ON(ret);
                 sem_init(&task->ready_for_work, 0, 0);
         }
-        ret = pthread_mutex_lock(&work_done_wait_mutex);
+        ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
         BUG_ON(ret);
 
         cpu_usage_0 = get_cpu_usage_nsec_parent();
 
-        pthread_mutex_unlock(&start_work_mutex);
+        pthread_mutex_unlock(&sched->start_work_mutex);
 
-        for (i = 0; i < nr_tasks; i++) {
-                task = tasks[i];
+        for (i = 0; i < sched->nr_tasks; i++) {
+                task = sched->tasks[i];
                 ret = sem_wait(&task->work_done_sem);
                 BUG_ON(ret);
                 sem_init(&task->work_done_sem, 0, 0);
-                cpu_usage += task->cpu_usage;
+                sched->cpu_usage += task->cpu_usage;
                 task->cpu_usage = 0;
         }
 
         cpu_usage_1 = get_cpu_usage_nsec_parent();
-        if (!runavg_cpu_usage)
-                runavg_cpu_usage = cpu_usage;
-        runavg_cpu_usage = (runavg_cpu_usage*9 + cpu_usage)/10;
+        if (!sched->runavg_cpu_usage)
+                sched->runavg_cpu_usage = sched->cpu_usage;
+        sched->runavg_cpu_usage = (sched->runavg_cpu_usage * 9 + sched->cpu_usage) / 10;
 
-        parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
-        if (!runavg_parent_cpu_usage)
-                runavg_parent_cpu_usage = parent_cpu_usage;
-        runavg_parent_cpu_usage = (runavg_parent_cpu_usage*9 +
-                                   parent_cpu_usage)/10;
+        sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
+        if (!sched->runavg_parent_cpu_usage)
+                sched->runavg_parent_cpu_usage = sched->parent_cpu_usage;
+        sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * 9 +
+                                         sched->parent_cpu_usage)/10;
 
-        ret = pthread_mutex_lock(&start_work_mutex);
+        ret = pthread_mutex_lock(&sched->start_work_mutex);
         BUG_ON(ret);
 
-        for (i = 0; i < nr_tasks; i++) {
-                task = tasks[i];
+        for (i = 0; i < sched->nr_tasks; i++) {
+                task = sched->tasks[i];
                 sem_init(&task->sleep_sem, 0, 0);
                 task->curr_event = 0;
         }
 }
 
-static void run_one_test(void)
+static void run_one_test(struct perf_sched *sched)
 {
         u64 T0, T1, delta, avg_delta, fluct;
 
         T0 = get_nsecs();
-        wait_for_tasks();
+        wait_for_tasks(sched);
         T1 = get_nsecs();
 
         delta = T1 - T0;
-        sum_runtime += delta;
-        nr_runs++;
+        sched->sum_runtime += delta;
+        sched->nr_runs++;
 
-        avg_delta = sum_runtime / nr_runs;
+        avg_delta = sched->sum_runtime / sched->nr_runs;
         if (delta < avg_delta)
                 fluct = avg_delta - delta;
         else
                 fluct = delta - avg_delta;
-        sum_fluct += fluct;
-        if (!run_avg)
-                run_avg = delta;
-        run_avg = (run_avg*9 + delta)/10;
+        sched->sum_fluct += fluct;
+        if (!sched->run_avg)
+                sched->run_avg = delta;
+        sched->run_avg = (sched->run_avg * 9 + delta) / 10;
 
-        printf("#%-3ld: %0.3f, ",
-                nr_runs, (double)delta/1000000.0);
+        printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / 1000000.0);
 
-        printf("ravg: %0.2f, ",
-                (double)run_avg/1e6);
+        printf("ravg: %0.2f, ", (double)sched->run_avg / 1e6);
 
         printf("cpu: %0.2f / %0.2f",
-                (double)cpu_usage/1e6, (double)runavg_cpu_usage/1e6);
+                (double)sched->cpu_usage / 1e6, (double)sched->runavg_cpu_usage / 1e6);
 
 #if 0
         /*
          * rusage statistics done by the parent, these are less
-         * accurate than the sum_exec_runtime based statistics:
+         * accurate than the sched->sum_exec_runtime based statistics:
          */
         printf(" [%0.2f / %0.2f]",
-                (double)parent_cpu_usage/1e6,
-                (double)runavg_parent_cpu_usage/1e6);
+                (double)sched->parent_cpu_usage/1e6,
+                (double)sched->runavg_parent_cpu_usage/1e6);
 #endif
 
         printf("\n");
 
-        if (nr_sleep_corrections)
-                printf(" (%ld sleep corrections)\n", nr_sleep_corrections);
-        nr_sleep_corrections = 0;
+        if (sched->nr_sleep_corrections)
+                printf(" (%ld sleep corrections)\n", sched->nr_sleep_corrections);
+        sched->nr_sleep_corrections = 0;
 }
 
-static void test_calibrations(void)
+static void test_calibrations(struct perf_sched *sched)
 {
         u64 T0, T1;
 
         T0 = get_nsecs();
-        burn_nsecs(1e6);
+        burn_nsecs(sched, 1e6);
         T1 = get_nsecs();
 
         printf("the run test took %" PRIu64 " nsecs\n", T1 - T0);
@@ -629,236 +650,92 @@ static void test_calibrations(void)
         printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0);
 }
 
-#define FILL_FIELD(ptr, field, event, data)     \
-        ptr.field = (typeof(ptr.field)) raw_field_value(event, #field, data)
-
-#define FILL_ARRAY(ptr, array, event, data)                     \
-do {                                                            \
-        void *__array = raw_field_ptr(event, #array, data);     \
-        memcpy(ptr.array, __array, sizeof(ptr.array));  \
-} while(0)
-
-#define FILL_COMMON_FIELDS(ptr, event, data)                    \
-do {                                                            \
-        FILL_FIELD(ptr, common_type, event, data);              \
-        FILL_FIELD(ptr, common_flags, event, data);             \
-        FILL_FIELD(ptr, common_preempt_count, event, data);     \
-        FILL_FIELD(ptr, common_pid, event, data);               \
-        FILL_FIELD(ptr, common_tgid, event, data);              \
-} while (0)
-
-
-
-struct trace_switch_event {
-        u32 size;
-
-        u16 common_type;
-        u8 common_flags;
-        u8 common_preempt_count;
-        u32 common_pid;
-        u32 common_tgid;
-
-        char prev_comm[16];
-        u32 prev_pid;
-        u32 prev_prio;
-        u64 prev_state;
-        char next_comm[16];
-        u32 next_pid;
-        u32 next_prio;
-};
-
-struct trace_runtime_event {
-        u32 size;
-
-        u16 common_type;
-        u8 common_flags;
-        u8 common_preempt_count;
-        u32 common_pid;
-        u32 common_tgid;
-
-        char comm[16];
-        u32 pid;
-        u64 runtime;
-        u64 vruntime;
-};
-
-struct trace_wakeup_event {
-        u32 size;
-
-        u16 common_type;
-        u8 common_flags;
-        u8 common_preempt_count;
-        u32 common_pid;
-        u32 common_tgid;
-
-        char comm[16];
-        u32 pid;
-
-        u32 prio;
-        u32 success;
-        u32 cpu;
-};
-
-struct trace_fork_event {
-        u32 size;
-
-        u16 common_type;
-        u8 common_flags;
-        u8 common_preempt_count;
-        u32 common_pid;
-        u32 common_tgid;
-
-        char parent_comm[16];
-        u32 parent_pid;
-        char child_comm[16];
-        u32 child_pid;
-};
-
-struct trace_migrate_task_event {
-        u32 size;
-
-        u16 common_type;
-        u8 common_flags;
-        u8 common_preempt_count;
-        u32 common_pid;
-        u32 common_tgid;
-
-        char comm[16];
-        u32 pid;
-
-        u32 prio;
-        u32 cpu;
-};
-
-struct trace_sched_handler {
-        void (*switch_event)(struct trace_switch_event *,
-                             struct machine *,
-                             struct event_format *,
-                             int cpu,
-                             u64 timestamp,
-                             struct thread *thread);
-
-        void (*runtime_event)(struct trace_runtime_event *,
-                              struct machine *,
-                              struct event_format *,
-                              int cpu,
-                              u64 timestamp,
-                              struct thread *thread);
-
-        void (*wakeup_event)(struct trace_wakeup_event *,
-                             struct machine *,
-                             struct event_format *,
-                             int cpu,
-                             u64 timestamp,
-                             struct thread *thread);
-
-        void (*fork_event)(struct trace_fork_event *,
-                           struct event_format *,
-                           int cpu,
-                           u64 timestamp,
-                           struct thread *thread);
-
-        void (*migrate_task_event)(struct trace_migrate_task_event *,
-                           struct machine *machine,
-                           struct event_format *,
-                           int cpu,
-                           u64 timestamp,
-                           struct thread *thread);
-};
-
-
-static void
-replay_wakeup_event(struct trace_wakeup_event *wakeup_event,
-                    struct machine *machine __used,
-                    struct event_format *event,
-                    int cpu __used,
-                    u64 timestamp __used,
-                    struct thread *thread __used)
+static int
+replay_wakeup_event(struct perf_sched *sched,
+                    struct perf_evsel *evsel, struct perf_sample *sample,
+                    struct machine *machine __maybe_unused)
 {
+        const char *comm = perf_evsel__strval(evsel, sample, "comm");
+        const u32 pid    = perf_evsel__intval(evsel, sample, "pid");
         struct task_desc *waker, *wakee;
 
         if (verbose) {
-                printf("sched_wakeup event %p\n", event);
+                printf("sched_wakeup event %p\n", evsel);
 
-                printf(" ... pid %d woke up %s/%d\n",
-                        wakeup_event->common_pid,
-                        wakeup_event->comm,
-                        wakeup_event->pid);
+                printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid);
         }
 
-        waker = register_pid(wakeup_event->common_pid, "<unknown>");
-        wakee = register_pid(wakeup_event->pid, wakeup_event->comm);
+        waker = register_pid(sched, sample->tid, "<unknown>");
+        wakee = register_pid(sched, pid, comm);
 
-        add_sched_event_wakeup(waker, timestamp, wakee);
+        add_sched_event_wakeup(sched, waker, sample->time, wakee);
+        return 0;
 }
 
-static u64 cpu_last_switched[MAX_CPUS];
-
-static void
-replay_switch_event(struct trace_switch_event *switch_event,
-                    struct machine *machine __used,
-                    struct event_format *event,
-                    int cpu,
-                    u64 timestamp,
-                    struct thread *thread __used)
+static int replay_switch_event(struct perf_sched *sched,
+                               struct perf_evsel *evsel,
+                               struct perf_sample *sample,
+                               struct machine *machine __maybe_unused)
 {
-        struct task_desc *prev, __used *next;
-        u64 timestamp0;
+        const char *prev_comm  = perf_evsel__strval(evsel, sample, "prev_comm"),
+                   *next_comm  = perf_evsel__strval(evsel, sample, "next_comm");
+        const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
+                  next_pid = perf_evsel__intval(evsel, sample, "next_pid");
+        const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
+        struct task_desc *prev, __maybe_unused *next;
+        u64 timestamp0, timestamp = sample->time;
+        int cpu = sample->cpu;
         s64 delta;
 
         if (verbose)
-                printf("sched_switch event %p\n", event);
+                printf("sched_switch event %p\n", evsel);
 
         if (cpu >= MAX_CPUS || cpu < 0)
-                return;
+                return 0;
 
-        timestamp0 = cpu_last_switched[cpu];
+        timestamp0 = sched->cpu_last_switched[cpu];
         if (timestamp0)
                 delta = timestamp - timestamp0;
         else
                 delta = 0;
 
-        if (delta < 0)
-                die("hm, delta: %" PRIu64 " < 0 ?\n", delta);
-
-        if (verbose) {
-                printf(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
-                        switch_event->prev_comm, switch_event->prev_pid,
-                        switch_event->next_comm, switch_event->next_pid,
-                        delta);
+        if (delta < 0) {
+                pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
+                return -1;
         }
 
-        prev = register_pid(switch_event->prev_pid, switch_event->prev_comm);
-        next = register_pid(switch_event->next_pid, switch_event->next_comm);
+        pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
+                 prev_comm, prev_pid, next_comm, next_pid, delta);
 
-        cpu_last_switched[cpu] = timestamp;
+        prev = register_pid(sched, prev_pid, prev_comm);
+        next = register_pid(sched, next_pid, next_comm);
 
-        add_sched_event_run(prev, timestamp, delta);
-        add_sched_event_sleep(prev, timestamp, switch_event->prev_state);
-}
+        sched->cpu_last_switched[cpu] = timestamp;
 
+        add_sched_event_run(sched, prev, timestamp, delta);
+        add_sched_event_sleep(sched, prev, timestamp, prev_state);
 
-static void
-replay_fork_event(struct trace_fork_event *fork_event,
-                  struct event_format *event,
-                  int cpu __used,
-                  u64 timestamp __used,
-                  struct thread *thread __used)
+        return 0;
+}
+
+static int replay_fork_event(struct perf_sched *sched, struct perf_evsel *evsel,
+                             struct perf_sample *sample)
 {
+        const char *parent_comm = perf_evsel__strval(evsel, sample, "parent_comm"),
+                   *child_comm  = perf_evsel__strval(evsel, sample, "child_comm");
+        const u32 parent_pid  = perf_evsel__intval(evsel, sample, "parent_pid"),
+                  child_pid  = perf_evsel__intval(evsel, sample, "child_pid");
+
         if (verbose) {
-                printf("sched_fork event %p\n", event);
-                printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid);
-                printf("...  child: %s/%d\n", fork_event->child_comm, fork_event->child_pid);
+                printf("sched_fork event %p\n", evsel);
+                printf("... parent: %s/%d\n", parent_comm, parent_pid);
+                printf("...  child: %s/%d\n", child_comm, child_pid);
         }
-        register_pid(fork_event->parent_pid, fork_event->parent_comm);
-        register_pid(fork_event->child_pid, fork_event->child_comm);
-}
 
-static struct trace_sched_handler replay_ops  = {
-        .wakeup_event           = replay_wakeup_event,
-        .switch_event           = replay_switch_event,
-        .fork_event             = replay_fork_event,
-};
+        register_pid(sched, parent_pid, parent_comm);
+        register_pid(sched, child_pid, child_comm);
+        return 0;
+}
 
 struct sort_dimension {
         const char              *name;
@@ -866,8 +743,6 @@ struct sort_dimension {
         struct list_head        list;
 };
 
-static LIST_HEAD(cmp_pid);
-
 static int
 thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
 {
@@ -936,43 +811,45 @@ __thread_latency_insert(struct rb_root *root, struct work_atoms *data,
         rb_insert_color(&data->node, root);
 }
 
-static void thread_atoms_insert(struct thread *thread)
+static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread)
 {
         struct work_atoms *atoms = zalloc(sizeof(*atoms));
-        if (!atoms)
-                die("No memory");
+        if (!atoms) {
+                pr_err("No memory at %s\n", __func__);
+                return -1;
+        }
 
         atoms->thread = thread;
         INIT_LIST_HEAD(&atoms->work_list);
-        __thread_latency_insert(&atom_root, atoms, &cmp_pid);
+        __thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid);
+        return 0;
 }
 
-static void
-latency_fork_event(struct trace_fork_event *fork_event __used,
-                   struct event_format *event __used,
-                   int cpu __used,
-                   u64 timestamp __used,
-                   struct thread *thread __used)
+static int latency_fork_event(struct perf_sched *sched __maybe_unused,
+                              struct perf_evsel *evsel __maybe_unused,
+                              struct perf_sample *sample __maybe_unused)
 {
         /* should insert the newcomer */
+        return 0;
 }
 
-__used
-static char sched_out_state(struct trace_switch_event *switch_event)
+static char sched_out_state(u64 prev_state)
 {
         const char *str = TASK_STATE_TO_CHAR_STR;
 
-        return str[switch_event->prev_state];
+        return str[prev_state];
 }
 
-static void
+static int
 add_sched_out_event(struct work_atoms *atoms,
                     char run_state,
                     u64 timestamp)
 {
         struct work_atom *atom = zalloc(sizeof(*atom));
-        if (!atom)
-                die("Non memory");
+        if (!atom) {
+                pr_err("Non memory at %s", __func__);
+                return -1;
+        }
 
         atom->sched_out_time = timestamp;
 
@@ -982,10 +859,12 @@ add_sched_out_event(struct work_atoms *atoms,
         }
 
         list_add_tail(&atom->list, &atoms->work_list);
+        return 0;
 }
 
 static void
-add_runtime_event(struct work_atoms *atoms, u64 delta, u64 timestamp __used)
+add_runtime_event(struct work_atoms *atoms, u64 delta,
+                  u64 timestamp __maybe_unused)
 {
         struct work_atom *atom;
 
@@ -1028,106 +907,128 @@ add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
         atoms->nb_atoms++;
 }
 
-static void
-latency_switch_event(struct trace_switch_event *switch_event,
-                     struct machine *machine,
-                     struct event_format *event __used,
-                     int cpu,
-                     u64 timestamp,
-                     struct thread *thread __used)
+static int latency_switch_event(struct perf_sched *sched,
+                                struct perf_evsel *evsel,
+                                struct perf_sample *sample,
+                                struct machine *machine)
 {
+        const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
+                  next_pid = perf_evsel__intval(evsel, sample, "next_pid");
+        const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
         struct work_atoms *out_events, *in_events;
         struct thread *sched_out, *sched_in;
-        u64 timestamp0;
+        u64 timestamp0, timestamp = sample->time;
+        int cpu = sample->cpu;
         s64 delta;
 
         BUG_ON(cpu >= MAX_CPUS || cpu < 0);
 
-        timestamp0 = cpu_last_switched[cpu];
-        cpu_last_switched[cpu] = timestamp;
+        timestamp0 = sched->cpu_last_switched[cpu];
+        sched->cpu_last_switched[cpu] = timestamp;
         if (timestamp0)
                 delta = timestamp - timestamp0;
         else
                 delta = 0;
 
-        if (delta < 0)
-                die("hm, delta: %" PRIu64 " < 0 ?\n", delta);
-
+        if (delta < 0) {
+                pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
+                return -1;
+        }
 
-        sched_out = machine__findnew_thread(machine, switch_event->prev_pid);
-        sched_in = machine__findnew_thread(machine, switch_event->next_pid);
+        sched_out = machine__findnew_thread(machine, prev_pid);
+        sched_in = machine__findnew_thread(machine, next_pid);
 
-        out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
+        out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
         if (!out_events) {
-                thread_atoms_insert(sched_out);
-                out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
-                if (!out_events)
-                        die("out-event: Internal tree error");
+                if (thread_atoms_insert(sched, sched_out))
+                        return -1;
+                out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
+                if (!out_events) {
+                        pr_err("out-event: Internal tree error");
+                        return -1;
+                }
         }
-        add_sched_out_event(out_events, sched_out_state(switch_event), timestamp);
+        if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp))
+                return -1;
 
-        in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
+        in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
         if (!in_events) {
-                thread_atoms_insert(sched_in);
-                in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
-                if (!in_events)
-                        die("in-event: Internal tree error");
+                if (thread_atoms_insert(sched, sched_in))
+                        return -1;
+                in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
+                if (!in_events) {
+                        pr_err("in-event: Internal tree error");
+                        return -1;
+                }
                 /*
                  * Take came in we have not heard about yet,
                  * add in an initial atom in runnable state:
                  */
-                add_sched_out_event(in_events, 'R', timestamp);
+                if (add_sched_out_event(in_events, 'R', timestamp))
+                        return -1;
         }
         add_sched_in_event(in_events, timestamp);
+
+        return 0;
 }
 
-static void
-latency_runtime_event(struct trace_runtime_event *runtime_event,
-                     struct machine *machine,
-                     struct event_format *event __used,
-                     int cpu,
-                     u64 timestamp,
-                     struct thread *this_thread __used)
+static int latency_runtime_event(struct perf_sched *sched,
+                                 struct perf_evsel *evsel,
+                                 struct perf_sample *sample,
+                                 struct machine *machine)
 {
-        struct thread *thread = machine__findnew_thread(machine, runtime_event->pid);
-        struct work_atoms *atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
+        const u32 pid      = perf_evsel__intval(evsel, sample, "pid");
+        const u64 runtime  = perf_evsel__intval(evsel, sample, "runtime");
+        struct thread *thread = machine__findnew_thread(machine, pid);
+        struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
+        u64 timestamp = sample->time;
+        int cpu = sample->cpu;
 
         BUG_ON(cpu >= MAX_CPUS || cpu < 0);
         if (!atoms) {
-                thread_atoms_insert(thread);
-                atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
-                if (!atoms)
-                        die("in-event: Internal tree error");
-                add_sched_out_event(atoms, 'R', timestamp);
+                if (thread_atoms_insert(sched, thread))
+                        return -1;
+                atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
+                if (!atoms) {
+                        pr_err("in-event: Internal tree error");
+                        return -1;
+                }
+                if (add_sched_out_event(atoms, 'R', timestamp))
+                        return -1;
         }
 
-        add_runtime_event(atoms, runtime_event->runtime, timestamp);
+        add_runtime_event(atoms, runtime, timestamp);
+        return 0;
 }
 
-static void
-latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
-                     struct machine *machine,
-                     struct event_format *__event __used,
-                     int cpu __used,
-                     u64 timestamp,
-                     struct thread *thread __used)
+static int latency_wakeup_event(struct perf_sched *sched,
+                                struct perf_evsel *evsel,
+                                struct perf_sample *sample,
+                                struct machine *machine)
 {
+        const u32 pid     = perf_evsel__intval(evsel, sample, "pid"),
+                  success = perf_evsel__intval(evsel, sample, "success");
         struct work_atoms *atoms;
         struct work_atom *atom;
         struct thread *wakee;
+        u64 timestamp = sample->time;
 
         /* Note for later, it may be interesting to observe the failing cases */
-        if (!wakeup_event->success)
-                return;
+        if (!success)
+                return 0;
 
-        wakee = machine__findnew_thread(machine, wakeup_event->pid);
-        atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
+        wakee = machine__findnew_thread(machine, pid);
+        atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
         if (!atoms) {
-                thread_atoms_insert(wakee);
-                atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
-                if (!atoms)
-                        die("wakeup-event: Internal tree error");
-                add_sched_out_event(atoms, 'S', timestamp);
+                if (thread_atoms_insert(sched, wakee))
+                        return -1;
+                atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
+                if (!atoms) {
+                        pr_err("wakeup-event: Internal tree error");
+                        return -1;
+                }
+                if (add_sched_out_event(atoms, 'S', timestamp))
+                        return -1;
         }
 
         BUG_ON(list_empty(&atoms->work_list));
@@ -1139,27 +1040,27 @@ latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
          * one CPU, or are only looking at only one, so don't
          * make useless noise.
          */
-        if (profile_cpu == -1 && atom->state != THREAD_SLEEPING)
-                nr_state_machine_bugs++;
+        if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING)
+                sched->nr_state_machine_bugs++;
 
-        nr_timestamps++;
+        sched->nr_timestamps++;
         if (atom->sched_out_time > timestamp) {
-                nr_unordered_timestamps++;
-                return;
+                sched->nr_unordered_timestamps++;
+                return 0;
         }
 
         atom->state = THREAD_WAIT_CPU;
         atom->wake_up_time = timestamp;
+        return 0;
 }
 
-static void
-latency_migrate_task_event(struct trace_migrate_task_event *migrate_task_event,
-                     struct machine *machine,
-                     struct event_format *__event __used,
-                     int cpu __used,
-                     u64 timestamp,
-                     struct thread *thread __used)
+static int latency_migrate_task_event(struct perf_sched *sched,
+                                      struct perf_evsel *evsel,
+                                      struct perf_sample *sample,
+                                      struct machine *machine)
 {
+        const u32 pid = perf_evsel__intval(evsel, sample, "pid");
+        u64 timestamp = sample->time;
         struct work_atoms *atoms;
         struct work_atom *atom;
         struct thread *migrant;
@@ -1167,18 +1068,22 @@ latency_migrate_task_event(struct trace_migrate_task_event *migrate_task_event,
         /*
          * Only need to worry about migration when profiling one CPU.
          */
-        if (profile_cpu == -1)
-                return;
+        if (sched->profile_cpu == -1)
+                return 0;
 
-        migrant = machine__findnew_thread(machine, migrate_task_event->pid);
-        atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
+        migrant = machine__findnew_thread(machine, pid);
+        atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
         if (!atoms) {
-                thread_atoms_insert(migrant);
-                register_pid(migrant->pid, migrant->comm);
-                atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
-                if (!atoms)
-                        die("migration-event: Internal tree error");
-                add_sched_out_event(atoms, 'R', timestamp);
+                if (thread_atoms_insert(sched, migrant))
+                        return -1;
+                register_pid(sched, migrant->pid, migrant->comm);
+                atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
+                if (!atoms) {
+                        pr_err("migration-event: Internal tree error");
+                        return -1;
+                }
+                if (add_sched_out_event(atoms, 'R', timestamp))
+                        return -1;
         }
 
         BUG_ON(list_empty(&atoms->work_list));
@@ -1186,21 +1091,15 @@ latency_migrate_task_event(struct trace_migrate_task_event *migrate_task_event,
         atom = list_entry(atoms->work_list.prev, struct work_atom, list);
         atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
 
-        nr_timestamps++;
+        sched->nr_timestamps++;
 
         if (atom->sched_out_time > timestamp)
-                nr_unordered_timestamps++;
-}
+                sched->nr_unordered_timestamps++;
 
-static struct trace_sched_handler lat_ops  = {
-        .wakeup_event           = latency_wakeup_event,
-        .switch_event           = latency_switch_event,
-        .runtime_event          = latency_runtime_event,
-        .fork_event             = latency_fork_event,
-        .migrate_task_event     = latency_migrate_task_event,
-};
+        return 0;
+}
 
-static void output_lat_thread(struct work_atoms *work_list)
+static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_list)
 {
         int i;
         int ret;
@@ -1214,8 +1113,8 @@ static void output_lat_thread(struct work_atoms *work_list)
         if (!strcmp(work_list->thread->comm, "swapper"))
                 return;
 
-        all_runtime += work_list->total_runtime;
-        all_count += work_list->nb_atoms;
+        sched->all_runtime += work_list->total_runtime;
+        sched->all_count   += work_list->nb_atoms;
 
         ret = printf("  %s:%d ", work_list->thread->comm, work_list->thread->pid);
 
@@ -1241,11 +1140,6 @@ static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
         return 0;
 }
 
-static struct sort_dimension pid_sort_dimension = {
-        .name                   = "pid",
-        .cmp                    = pid_cmp,
-};
-
 static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
 {
         u64 avgl, avgr;
@@ -1267,11 +1161,6 @@ static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
         return 0;
 }
 
-static struct sort_dimension avg_sort_dimension = {
-        .name                   = "avg",
-        .cmp                    = avg_cmp,
-};
-
 static int max_cmp(struct work_atoms *l, struct work_atoms *r)
 {
         if (l->max_lat < r->max_lat)
@@ -1282,11 +1171,6 @@ static int max_cmp(struct work_atoms *l, struct work_atoms *r)
         return 0;
 }
 
-static struct sort_dimension max_sort_dimension = {
-        .name                   = "max",
-        .cmp                    = max_cmp,
-};
-
 static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
 {
         if (l->nb_atoms < r->nb_atoms)
@@ -1297,11 +1181,6 @@ static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
         return 0;
 }
 
-static struct sort_dimension switch_sort_dimension = {
-        .name                   = "switch",
-        .cmp                    = switch_cmp,
-};
-
 static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
 {
         if (l->total_runtime < r->total_runtime)
@@ -1312,28 +1191,38 @@ static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
         return 0;
 }
 
-static struct sort_dimension runtime_sort_dimension = {
-        .name                   = "runtime",
-        .cmp                    = runtime_cmp,
-};
-
-static struct sort_dimension *available_sorts[] = {
-        &pid_sort_dimension,
-        &avg_sort_dimension,
-        &max_sort_dimension,
-        &switch_sort_dimension,
-        &runtime_sort_dimension,
-};
-
-#define NB_AVAILABLE_SORTS      (int)(sizeof(available_sorts) / sizeof(struct sort_dimension *))
-
-static LIST_HEAD(sort_list);
-
 static int sort_dimension__add(const char *tok, struct list_head *list)
 {
-        int i;
+        size_t i;
+        static struct sort_dimension avg_sort_dimension = {
+                .name = "avg",
+                .cmp  = avg_cmp,
+        };
+        static struct sort_dimension max_sort_dimension = {
+                .name = "max",
+                .cmp  = max_cmp,
+        };
+        static struct sort_dimension pid_sort_dimension = {
+                .name = "pid",
+                .cmp  = pid_cmp,
+        };
+        static struct sort_dimension runtime_sort_dimension = {
+                .name = "runtime",
+                .cmp  = runtime_cmp,
+        };
+        static struct sort_dimension switch_sort_dimension = {
+                .name = "switch",
+                .cmp  = switch_cmp,
+        };
+        struct sort_dimension *available_sorts[] = {
+                &pid_sort_dimension,
+                &avg_sort_dimension,
+                &max_sort_dimension,
+                &switch_sort_dimension,
+                &runtime_sort_dimension,
+        };
 
-        for (i = 0; i < NB_AVAILABLE_SORTS; i++) {
+        for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
                 if (!strcmp(available_sorts[i]->name, tok)) {
                         list_add_tail(&available_sorts[i]->list, list);
 
@@ -1344,126 +1233,97 @@ static int sort_dimension__add(const char *tok, struct list_head *list)
         return -1;
 }
 
-static void setup_sorting(void);
-
-static void sort_lat(void)
+static void perf_sched__sort_lat(struct perf_sched *sched)
 {
         struct rb_node *node;
 
         for (;;) {
                 struct work_atoms *data;
-                node = rb_first(&atom_root);
+                node = rb_first(&sched->atom_root);
                 if (!node)
                         break;
 
-                rb_erase(node, &atom_root);
+                rb_erase(node, &sched->atom_root);
                 data = rb_entry(node, struct work_atoms, node);
-                __thread_latency_insert(&sorted_atom_root, data, &sort_list);
+                __thread_latency_insert(&sched->sorted_atom_root, data, &sched->sort_list);
         }
 }
 
-static struct trace_sched_handler *trace_handler;
-
-static void
-process_sched_wakeup_event(struct perf_tool *tool __used,
-                           struct event_format *event,
-                           struct perf_sample *sample,
-                           struct machine *machine,
-                           struct thread *thread)
+static int process_sched_wakeup_event(struct perf_tool *tool,
+                                      struct perf_evsel *evsel,
+                                      struct perf_sample *sample,
+                                      struct machine *machine)
 {
-        void *data = sample->raw_data;
-        struct trace_wakeup_event wakeup_event;
-
-        FILL_COMMON_FIELDS(wakeup_event, event, data);
+        struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
 
-        FILL_ARRAY(wakeup_event, comm, event, data);
-        FILL_FIELD(wakeup_event, pid, event, data);
-        FILL_FIELD(wakeup_event, prio, event, data);
-        FILL_FIELD(wakeup_event, success, event, data);
-        FILL_FIELD(wakeup_event, cpu, event, data);
+        if (sched->tp_handler->wakeup_event)
+                return sched->tp_handler->wakeup_event(sched, evsel, sample, machine);
 
-        if (trace_handler->wakeup_event)
-                trace_handler->wakeup_event(&wakeup_event, machine, event,
-                                            sample->cpu, sample->time, thread);
+        return 0;
 }
 
-/*
- * Track the current task - that way we can know whether there's any
- * weird events, such as a task being switched away that is not current.
- */
-static int max_cpu;
-
-static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 };
-
-static struct thread *curr_thread[MAX_CPUS];
-
-static char next_shortname1 = 'A';
-static char next_shortname2 = '0';
-
-static void
-map_switch_event(struct trace_switch_event *switch_event,
-                 struct machine *machine,
-                 struct event_format *event __used,
-                 int this_cpu,
-                 u64 timestamp,
-                 struct thread *thread __used)
+static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
+                            struct perf_sample *sample, struct machine *machine)
 {
-        struct thread *sched_out __used, *sched_in;
+        const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
+                  next_pid = perf_evsel__intval(evsel, sample, "next_pid");
+        struct thread *sched_out __maybe_unused, *sched_in;
         int new_shortname;
-        u64 timestamp0;
+        u64 timestamp0, timestamp = sample->time;
         s64 delta;
-        int cpu;
+        int cpu, this_cpu = sample->cpu;
 
         BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
 
-        if (this_cpu > max_cpu)
-                max_cpu = this_cpu;
+        if (this_cpu > sched->max_cpu)
+                sched->max_cpu = this_cpu;
 
-        timestamp0 = cpu_last_switched[this_cpu];
-        cpu_last_switched[this_cpu] = timestamp;
+        timestamp0 = sched->cpu_last_switched[this_cpu];
+        sched->cpu_last_switched[this_cpu] = timestamp;
         if (timestamp0)
                 delta = timestamp - timestamp0;
         else
                 delta = 0;
 
-        if (delta < 0)
-                die("hm, delta: %" PRIu64 " < 0 ?\n", delta);
-
+        if (delta < 0) {
+                pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
+                return -1;
+        }
 
-        sched_out = machine__findnew_thread(machine, switch_event->prev_pid);
-        sched_in = machine__findnew_thread(machine, switch_event->next_pid);
+        sched_out = machine__findnew_thread(machine, prev_pid);
+        sched_in = machine__findnew_thread(machine, next_pid);
 
-        curr_thread[this_cpu] = sched_in;
+        sched->curr_thread[this_cpu] = sched_in;
 
         printf("  ");
 
         new_shortname = 0;
         if (!sched_in->shortname[0]) {
-                sched_in->shortname[0] = next_shortname1;
-                sched_in->shortname[1] = next_shortname2;
+                sched_in->shortname[0] = sched->next_shortname1;
+                sched_in->shortname[1] = sched->next_shortname2;
 
-                if (next_shortname1 < 'Z') {
-                        next_shortname1++;
+                if (sched->next_shortname1 < 'Z') {
+                        sched->next_shortname1++;
                 } else {
-                        next_shortname1='A';
-                        if (next_shortname2 < '9') {
-                                next_shortname2++;
+                        sched->next_shortname1='A';
+                        if (sched->next_shortname2 < '9') {
+                                sched->next_shortname2++;
                         } else {
-                                next_shortname2='0';
+                                sched->next_shortname2='0';
                         }
                 }
                 new_shortname = 1;
         }
 
-        for (cpu = 0; cpu <= max_cpu; cpu++) {
+        for (cpu = 0; cpu <= sched->max_cpu; cpu++) {
                 if (cpu != this_cpu)
                         printf(" ");
                 else
                         printf("*");
 
-                if (curr_thread[cpu]) {
-                        if (curr_thread[cpu]->pid)
-                                printf("%2s ", curr_thread[cpu]->shortname);
+                if (sched->curr_thread[cpu]) {
+                        if (sched->curr_thread[cpu]->pid)
+                                printf("%2s ", sched->curr_thread[cpu]->shortname);
                         else
                                 printf(".  ");
                 } else
@@ -1477,134 +1337,97 @@ map_switch_event(struct trace_switch_event *switch_event,
         } else {
                 printf("\n");
         }
+
+        return 0;
 }
 
-static void
-process_sched_switch_event(struct perf_tool *tool __used,
-                           struct event_format *event,
-                           struct perf_sample *sample,
-                           struct machine *machine,
-                           struct thread *thread)
+static int process_sched_switch_event(struct perf_tool *tool,
+                                      struct perf_evsel *evsel,
+                                      struct perf_sample *sample,
+                                      struct machine *machine)
 {
-        int this_cpu = sample->cpu;
-        void *data = sample->raw_data;
-        struct trace_switch_event switch_event;
-
-        FILL_COMMON_FIELDS(switch_event, event, data);
-
-        FILL_ARRAY(switch_event, prev_comm, event, data);
-        FILL_FIELD(switch_event, prev_pid, event, data);
-        FILL_FIELD(switch_event, prev_prio, event, data);
-        FILL_FIELD(switch_event, prev_state, event, data);
-        FILL_ARRAY(switch_event, next_comm, event, data);
-        FILL_FIELD(switch_event, next_pid, event, data);
-        FILL_FIELD(switch_event, next_prio, event, data);
+        struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
+        int this_cpu = sample->cpu, err = 0;
+        u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
+            next_pid = perf_evsel__intval(evsel, sample, "next_pid");
 
-        if (curr_pid[this_cpu] != (u32)-1) {
+        if (sched->curr_pid[this_cpu] != (u32)-1) {
                 /*
                  * Are we trying to switch away a PID that is
                  * not current?
                  */
-                if (curr_pid[this_cpu] != switch_event.prev_pid)
-                        nr_context_switch_bugs++;
+                if (sched->curr_pid[this_cpu] != prev_pid)
+                        sched->nr_context_switch_bugs++;
         }
-        if (trace_handler->switch_event)
-                trace_handler->switch_event(&switch_event, machine, event,
-                                            this_cpu, sample->time, thread);
 
-        curr_pid[this_cpu] = switch_event.next_pid;
+        if (sched->tp_handler->switch_event)
+                err = sched->tp_handler->switch_event(sched, evsel, sample, machine);
+
+        sched->curr_pid[this_cpu] = next_pid;
+        return err;
 }
 
-static void
-process_sched_runtime_event(struct perf_tool *tool __used,
-                            struct event_format *event,
-                            struct perf_sample *sample,
-                            struct machine *machine,
-                            struct thread *thread)
+static int process_sched_runtime_event(struct perf_tool *tool,
+                                       struct perf_evsel *evsel,
+                                       struct perf_sample *sample,
+                                       struct machine *machine)
 {
-        void *data = sample->raw_data;
-        struct trace_runtime_event runtime_event;
+        struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
 
-        FILL_ARRAY(runtime_event, comm, event, data);
-        FILL_FIELD(runtime_event, pid, event, data);
-        FILL_FIELD(runtime_event, runtime, event, data);
-        FILL_FIELD(runtime_event, vruntime, event, data);
+        if (sched->tp_handler->runtime_event)
+                return sched->tp_handler->runtime_event(sched, evsel, sample, machine);
 
-        if (trace_handler->runtime_event)
-                trace_handler->runtime_event(&runtime_event, machine, event,
-                                             sample->cpu, sample->time, thread);
+        return 0;
 }
 
-static void
-process_sched_fork_event(struct perf_tool *tool __used,
-                         struct event_format *event,
-                         struct perf_sample *sample,
-                         struct machine *machine __used,
-                         struct thread *thread)
+static int process_sched_fork_event(struct perf_tool *tool,
+                                    struct perf_evsel *evsel,
+                                    struct perf_sample *sample,
+                                    struct machine *machine __maybe_unused)
 {
-        void *data = sample->raw_data;
-        struct trace_fork_event fork_event;
-
-        FILL_COMMON_FIELDS(fork_event, event, data);
+        struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
 
-        FILL_ARRAY(fork_event, parent_comm, event, data);
-        FILL_FIELD(fork_event, parent_pid, event, data);
-        FILL_ARRAY(fork_event, child_comm, event, data);
-        FILL_FIELD(fork_event, child_pid, event, data);
+        if (sched->tp_handler->fork_event)
+                return sched->tp_handler->fork_event(sched, evsel, sample);
 
-        if (trace_handler->fork_event)
-                trace_handler->fork_event(&fork_event, event,
-                                          sample->cpu, sample->time, thread);
+        return 0;
 }
 
-static void
-process_sched_exit_event(struct perf_tool *tool __used,
-                         struct event_format *event,
-                         struct perf_sample *sample __used,
-                         struct machine *machine __used,
-                         struct thread *thread __used)
+static int process_sched_exit_event(struct perf_tool *tool __maybe_unused,
+                                    struct perf_evsel *evsel,
+                                    struct perf_sample *sample __maybe_unused,
+                                    struct machine *machine __maybe_unused)
 {
-        if (verbose)
-                printf("sched_exit event %p\n", event);
+        pr_debug("sched_exit event %p\n", evsel);
+        return 0;
 }
 
-static void
-process_sched_migrate_task_event(struct perf_tool *tool __used,
-                                 struct event_format *event,
-                                 struct perf_sample *sample,
-                                 struct machine *machine,
-                                 struct thread *thread)
+static int process_sched_migrate_task_event(struct perf_tool *tool,
+                                            struct perf_evsel *evsel,
+                                            struct perf_sample *sample,
+                                            struct machine *machine)
 {
-        void *data = sample->raw_data;
-        struct trace_migrate_task_event migrate_task_event;
-
-        FILL_COMMON_FIELDS(migrate_task_event, event, data);
+        struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
 
-        FILL_ARRAY(migrate_task_event, comm, event, data);
-        FILL_FIELD(migrate_task_event, pid, event, data);
-        FILL_FIELD(migrate_task_event, prio, event, data);
-        FILL_FIELD(migrate_task_event, cpu, event, data);
+        if (sched->tp_handler->migrate_task_event)
+                return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine);
 
-        if (trace_handler->migrate_task_event)
-                trace_handler->migrate_task_event(&migrate_task_event, machine,
-                                                  event, sample->cpu,
-                                                  sample->time, thread);
+        return 0;
 }
 
-typedef void (*tracepoint_handler)(struct perf_tool *tool, struct event_format *event,
-                                   struct perf_sample *sample,
-                                   struct machine *machine,
-                                   struct thread *thread);
+typedef int (*tracepoint_handler)(struct perf_tool *tool,
+                                  struct perf_evsel *evsel,
+                                  struct perf_sample *sample,
+                                  struct machine *machine);
 
-static int perf_sched__process_tracepoint_sample(struct perf_tool *tool,
-                                                 union perf_event *event __used,
+static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused,
+                                                 union perf_event *event __maybe_unused,
                                                  struct perf_sample *sample,
                                                  struct perf_evsel *evsel,
                                                  struct machine *machine)
 {
-        struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
-        struct pevent *pevent = sched->session->pevent;
         struct thread *thread = machine__findnew_thread(machine, sample->pid);
+        int err = 0;
 
         if (thread == NULL) {
                 pr_debug("problem processing %s event, skipping it.\n",
@@ -1617,30 +1440,15 @@ static int perf_sched__process_tracepoint_sample(struct perf_tool *tool,
 
         if (evsel->handler.func != NULL) {
                 tracepoint_handler f = evsel->handler.func;
-
-                if (evsel->handler.data == NULL)
-                        evsel->handler.data = pevent_find_event(pevent,
-                                                          evsel->attr.config);
-
-                f(tool, evsel->handler.data, sample, machine, thread);
+                err = f(tool, evsel, sample, machine);
         }
 
-        return 0;
+        return err;
 }
 
-static struct perf_sched perf_sched = {
-        .tool = {
-                .sample          = perf_sched__process_tracepoint_sample,
-                .comm            = perf_event__process_comm,
-                .lost            = perf_event__process_lost,
-                .fork            = perf_event__process_task,
-                .ordered_samples = true,
-        },
-};
-
-static void read_events(bool destroy, struct perf_session **psession)
+static int perf_sched__read_events(struct perf_sched *sched, bool destroy,
+                                   struct perf_session **psession)
 {
-        int err = -EINVAL;
         const struct perf_evsel_str_handler handlers[] = {
                 { "sched:sched_switch",       process_sched_switch_event, },
                 { "sched:sched_stat_runtime", process_sched_runtime_event, },
@@ -1652,24 +1460,25 @@ static void read_events(bool destroy, struct perf_session **psession)
         };
         struct perf_session *session;
 
-        session = perf_session__new(input_name, O_RDONLY, 0, false,
-                                    &perf_sched.tool);
-        if (session == NULL)
-                die("No Memory");
-
-        perf_sched.session = session;
+        session = perf_session__new(sched->input_name, O_RDONLY, 0, false, &sched->tool);
+        if (session == NULL) {
+                pr_debug("No Memory for session\n");
+                return -1;
+        }
 
-        err = perf_session__set_tracepoints_handlers(session, handlers);
-        assert(err == 0);
+        if (perf_session__set_tracepoints_handlers(session, handlers))
+                goto out_delete;
 
         if (perf_session__has_traces(session, "record -R")) {
-                err = perf_session__process_events(session, &perf_sched.tool);
-                if (err)
-                        die("Failed to process events, error %d", err);
+                int err = perf_session__process_events(session, &sched->tool);
+                if (err) {
+                        pr_err("Failed to process events, error %d", err);
+                        goto out_delete;
+                }
 
-                nr_events      = session->hists.stats.nr_events[0];
-                nr_lost_events = session->hists.stats.total_lost;
-                nr_lost_chunks = session->hists.stats.nr_events[PERF_RECORD_LOST];
+                sched->nr_events      = session->hists.stats.nr_events[0];
+                sched->nr_lost_events = session->hists.stats.total_lost;
+                sched->nr_lost_chunks = session->hists.stats.nr_events[PERF_RECORD_LOST];
         }
 
         if (destroy)
@@ -1677,208 +1486,166 @@ static void read_events(bool destroy, struct perf_session **psession)
 
         if (psession)
                 *psession = session;
+
+        return 0;
+
+out_delete:
+        perf_session__delete(session);
+        return -1;
 }
 
-static void print_bad_events(void)
+static void print_bad_events(struct perf_sched *sched)
 {
-        if (nr_unordered_timestamps && nr_timestamps) {
+        if (sched->nr_unordered_timestamps && sched->nr_timestamps) {
                 printf("  INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
-                        (double)nr_unordered_timestamps/(double)nr_timestamps*100.0,
-                        nr_unordered_timestamps, nr_timestamps);
+                        (double)sched->nr_unordered_timestamps/(double)sched->nr_timestamps*100.0,
+                        sched->nr_unordered_timestamps, sched->nr_timestamps);
         }
-        if (nr_lost_events && nr_events) {
+        if (sched->nr_lost_events && sched->nr_events) {
                 printf("  INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
-                        (double)nr_lost_events/(double)nr_events*100.0,
-                        nr_lost_events, nr_events, nr_lost_chunks);
+                        (double)sched->nr_lost_events/(double)sched->nr_events * 100.0,
+                        sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks);
         }
-        if (nr_state_machine_bugs && nr_timestamps) {
+        if (sched->nr_state_machine_bugs && sched->nr_timestamps) {
                 printf("  INFO: %.3f%% state machine bugs (%ld out of %ld)",
-                        (double)nr_state_machine_bugs/(double)nr_timestamps*100.0,
-                        nr_state_machine_bugs, nr_timestamps);
-                if (nr_lost_events)
+                        (double)sched->nr_state_machine_bugs/(double)sched->nr_timestamps*100.0,
+                        sched->nr_state_machine_bugs, sched->nr_timestamps);
+                if (sched->nr_lost_events)
                         printf(" (due to lost events?)");
                 printf("\n");
         }
-        if (nr_context_switch_bugs && nr_timestamps) {
+        if (sched->nr_context_switch_bugs && sched->nr_timestamps) {
                 printf("  INFO: %.3f%% context switch bugs (%ld out of %ld)",
-                        (double)nr_context_switch_bugs/(double)nr_timestamps*100.0,
-                        nr_context_switch_bugs, nr_timestamps);
-                if (nr_lost_events)
+                        (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0,
+                        sched->nr_context_switch_bugs, sched->nr_timestamps);
+                if (sched->nr_lost_events)
                         printf(" (due to lost events?)");
                 printf("\n");
         }
 }
 
-static void __cmd_lat(void)
+static int perf_sched__lat(struct perf_sched *sched)
 {
         struct rb_node *next;
         struct perf_session *session;
 
         setup_pager();
-        read_events(false, &session);
-        sort_lat();
+        if (perf_sched__read_events(sched, false, &session))
+                return -1;
+        perf_sched__sort_lat(sched);
 
         printf("\n ---------------------------------------------------------------------------------------------------------------\n");
         printf("  Task                  |   Runtime ms  | Switches | Average delay ms | Maximum delay ms | Maximum delay at     |\n");
         printf(" ---------------------------------------------------------------------------------------------------------------\n");
 
-        next = rb_first(&sorted_atom_root);
+        next = rb_first(&sched->sorted_atom_root);
 
         while (next) {
                 struct work_atoms *work_list;
 
                 work_list = rb_entry(next, struct work_atoms, node);
-                output_lat_thread(work_list);
+                output_lat_thread(sched, work_list);
                 next = rb_next(next);
         }
 
         printf(" -----------------------------------------------------------------------------------------\n");
         printf("  TOTAL:                |%11.3f ms |%9" PRIu64 " |\n",
-                (double)all_runtime/1e6, all_count);
+                (double)sched->all_runtime / 1e6, sched->all_count);
 
         printf(" ---------------------------------------------------\n");
 
-        print_bad_events();
+        print_bad_events(sched);
         printf("\n");
 
         perf_session__delete(session);
+        return 0;
 }
 
-static struct trace_sched_handler map_ops  = {
-        .wakeup_event           = NULL,
-        .switch_event           = map_switch_event,
-        .runtime_event          = NULL,
-        .fork_event             = NULL,
-};
-
-static void __cmd_map(void)
+static int perf_sched__map(struct perf_sched *sched)
 {
-        max_cpu = sysconf(_SC_NPROCESSORS_CONF);
+        sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF);
 
         setup_pager();
-        read_events(true, NULL);
-        print_bad_events();
+        if (perf_sched__read_events(sched, true, NULL))
+                return -1;
+        print_bad_events(sched);
+        return 0;
 }
 
-static void __cmd_replay(void)
+static int perf_sched__replay(struct perf_sched *sched)
 {
         unsigned long i;
 
-        calibrate_run_measurement_overhead();
-        calibrate_sleep_measurement_overhead();
+        calibrate_run_measurement_overhead(sched);
+        calibrate_sleep_measurement_overhead(sched);
 
-        test_calibrations();
+        test_calibrations(sched);
 
-        read_events(true, NULL);
+        if (perf_sched__read_events(sched, true, NULL))
+                return -1;
 
-        printf("nr_run_events:        %ld\n", nr_run_events);
-        printf("nr_sleep_events:      %ld\n", nr_sleep_events);
-        printf("nr_wakeup_events:     %ld\n", nr_wakeup_events);
+        printf("nr_run_events:        %ld\n", sched->nr_run_events);
+        printf("nr_sleep_events:      %ld\n", sched->nr_sleep_events);
+        printf("nr_wakeup_events:     %ld\n", sched->nr_wakeup_events);
 
-        if (targetless_wakeups)
-                printf("target-less wakeups:  %ld\n", targetless_wakeups);
-        if (multitarget_wakeups)
-                printf("multi-target wakeups: %ld\n", multitarget_wakeups);
-        if (nr_run_events_optimized)
+        if (sched->targetless_wakeups)
+                printf("target-less wakeups:  %ld\n", sched->targetless_wakeups);
+        if (sched->multitarget_wakeups)
+                printf("multi-target wakeups: %ld\n", sched->multitarget_wakeups);
+        if (sched->nr_run_events_optimized)
                 printf("run atoms optimized: %ld\n",
-                        nr_run_events_optimized);
+                        sched->nr_run_events_optimized);
 
-        print_task_traces();
-        add_cross_task_wakeups();
+        print_task_traces(sched);
+        add_cross_task_wakeups(sched);
 
-        create_tasks();
+        create_tasks(sched);
         printf("------------------------------------------------------------\n");
-        for (i = 0; i < replay_repeat; i++)
-                run_one_test();
-}
-
-
-static const char * const sched_usage[] = {
-        "perf sched [<options>] {record|latency|map|replay|script}",
-        NULL
-};
-
-static const struct option sched_options[] = {
-        OPT_STRING('i', "input", &input_name, "file",
-                    "input file name"),
-        OPT_INCR('v', "verbose", &verbose,
-                    "be more verbose (show symbol address, etc)"),
-        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
-                    "dump raw trace in ASCII"),
-        OPT_END()
-};
-
-static const char * const latency_usage[] = {
-        "perf sched latency [<options>]",
-        NULL
-};
-
-static const struct option latency_options[] = {
-        OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
-                   "sort by key(s): runtime, switch, avg, max"),
-        OPT_INCR('v', "verbose", &verbose,
-                    "be more verbose (show symbol address, etc)"),
-        OPT_INTEGER('C', "CPU", &profile_cpu,
-                    "CPU to profile on"),
-        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
-                    "dump raw trace in ASCII"),
-        OPT_END()
-};
-
-static const char * const replay_usage[] = {
-        "perf sched replay [<options>]",
-        NULL
-};
+        for (i = 0; i < sched->replay_repeat; i++)
+                run_one_test(sched);
 
-static const struct option replay_options[] = {
-        OPT_UINTEGER('r', "repeat", &replay_repeat,
-                     "repeat the workload replay N times (-1: infinite)"),
-        OPT_INCR('v', "verbose", &verbose,
-                    "be more verbose (show symbol address, etc)"),
-        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
-                    "dump raw trace in ASCII"),
-        OPT_END()
-};
+        return 0;
+}
 
-static void setup_sorting(void)
+static void setup_sorting(struct perf_sched *sched, const struct option *options,
+                          const char * const usage_msg[])
 {
-        char *tmp, *tok, *str = strdup(sort_order);
+        char *tmp, *tok, *str = strdup(sched->sort_order);
 
         for (tok = strtok_r(str, ", ", &tmp);
                         tok; tok = strtok_r(NULL, ", ", &tmp)) {
-                if (sort_dimension__add(tok, &sort_list) < 0) {
+                if (sort_dimension__add(tok, &sched->sort_list) < 0) {
                         error("Unknown --sort key: `%s'", tok);
-                        usage_with_options(latency_usage, latency_options);
+                        usage_with_options(usage_msg, options);
                 }
         }
 
         free(str);
 
-        sort_dimension__add("pid", &cmp_pid);
+        sort_dimension__add("pid", &sched->cmp_pid);
 }
 
-static const char *record_args[] = {
-        "record",
-        "-a",
-        "-R",
-        "-f",
-        "-m", "1024",
-        "-c", "1",
-        "-e", "sched:sched_switch",
-        "-e", "sched:sched_stat_wait",
-        "-e", "sched:sched_stat_sleep",
-        "-e", "sched:sched_stat_iowait",
-        "-e", "sched:sched_stat_runtime",
-        "-e", "sched:sched_process_exit",
-        "-e", "sched:sched_process_fork",
-        "-e", "sched:sched_wakeup",
-        "-e", "sched:sched_migrate_task",
-};
-
 static int __cmd_record(int argc, const char **argv)
 {
         unsigned int rec_argc, i, j;
         const char **rec_argv;
+        const char * const record_args[] = {
+                "record",
+                "-a",
+                "-R",
+                "-f",
+                "-m", "1024",
+                "-c", "1",
+                "-e", "sched:sched_switch",
+                "-e", "sched:sched_stat_wait",
+                "-e", "sched:sched_stat_sleep",
+                "-e", "sched:sched_stat_iowait",
+                "-e", "sched:sched_stat_runtime",
+                "-e", "sched:sched_process_exit",
+                "-e", "sched:sched_process_fork",
+                "-e", "sched:sched_wakeup",
+                "-e", "sched:sched_migrate_task",
+        };
 
         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
         rec_argv = calloc(rec_argc + 1, sizeof(char *));
@@ -1897,8 +1664,85 @@ static int __cmd_record(int argc, const char **argv)
         return cmd_record(i, rec_argv, NULL);
 }
 
-int cmd_sched(int argc, const char **argv, const char *prefix __used)
+int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
 {
+        const char default_sort_order[] = "avg, max, switch, runtime";
+        struct perf_sched sched = {
+                .tool = {
+                        .sample          = perf_sched__process_tracepoint_sample,
+                        .comm            = perf_event__process_comm,
+                        .lost            = perf_event__process_lost,
+                        .fork            = perf_event__process_task,
+                        .ordered_samples = true,
+                },
+                .cmp_pid              = LIST_HEAD_INIT(sched.cmp_pid),
+                .sort_list            = LIST_HEAD_INIT(sched.sort_list),
+                .start_work_mutex     = PTHREAD_MUTEX_INITIALIZER,
+                .work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER,
+                .curr_pid             = { [0 ... MAX_CPUS - 1] = -1 },
+                .sort_order           = default_sort_order,
+                .replay_repeat        = 10,
+                .profile_cpu          = -1,
+                .next_shortname1      = 'A',
+                .next_shortname2      = '0',
+        };
+        const struct option latency_options[] = {
+        OPT_STRING('s', "sort", &sched.sort_order, "key[,key2...]",
+                   "sort by key(s): runtime, switch, avg, max"),
+        OPT_INCR('v', "verbose", &verbose,
+                    "be more verbose (show symbol address, etc)"),
+        OPT_INTEGER('C', "CPU", &sched.profile_cpu,
+                    "CPU to profile on"),
+        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+                    "dump raw trace in ASCII"),
+        OPT_END()
+        };
+        const struct option replay_options[] = {
+        OPT_UINTEGER('r', "repeat", &sched.replay_repeat,
+                     "repeat the workload replay N times (-1: infinite)"),
+        OPT_INCR('v', "verbose", &verbose,
+                    "be more verbose (show symbol address, etc)"),
+        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+                    "dump raw trace in ASCII"),
+        OPT_END()
+        };
+        const struct option sched_options[] = {
+        OPT_STRING('i', "input", &sched.input_name, "file",
+                    "input file name"),
+        OPT_INCR('v', "verbose", &verbose,
+                    "be more verbose (show symbol address, etc)"),
+        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+                    "dump raw trace in ASCII"),
+        OPT_END()
+        };
+        const char * const latency_usage[] = {
+                "perf sched latency [<options>]",
+                NULL
+        };
+        const char * const replay_usage[] = {
+                "perf sched replay [<options>]",
+                NULL
+        };
+        const char * const sched_usage[] = {
+                "perf sched [<options>] {record|latency|map|replay|script}",
+                NULL
+        };
+        struct trace_sched_handler lat_ops  = {
+                .wakeup_event       = latency_wakeup_event,
+                .switch_event       = latency_switch_event,
+                .runtime_event      = latency_runtime_event,
+                .fork_event         = latency_fork_event,
+                .migrate_task_event = latency_migrate_task_event,
+        };
+        struct trace_sched_handler map_ops  = {
+                .switch_event       = map_switch_event,
+        };
+        struct trace_sched_handler replay_ops  = {
+                .wakeup_event       = replay_wakeup_event,
+                .switch_event       = replay_switch_event,
+                .fork_event         = replay_fork_event,
+        };
+
         argc = parse_options(argc, argv, sched_options, sched_usage,
                              PARSE_OPT_STOP_AT_NON_OPTION);
         if (!argc)
@@ -1914,26 +1758,26 @@ int cmd_sched(int argc, const char **argv, const char *prefix __used)
         if (!strncmp(argv[0], "rec", 3)) {
                 return __cmd_record(argc, argv);
         } else if (!strncmp(argv[0], "lat", 3)) {
-                trace_handler = &lat_ops;
+                sched.tp_handler = &lat_ops;
                 if (argc > 1) {
                         argc = parse_options(argc, argv, latency_options, latency_usage, 0);
                         if (argc)
                                 usage_with_options(latency_usage, latency_options);
                 }
-                setup_sorting();
-                __cmd_lat();
+                setup_sorting(&sched, latency_options, latency_usage);
+                return perf_sched__lat(&sched);
         } else if (!strcmp(argv[0], "map")) {
-                trace_handler = &map_ops;
-                setup_sorting();
-                __cmd_map();
+                sched.tp_handler = &map_ops;
+                setup_sorting(&sched, latency_options, latency_usage);
+                return perf_sched__map(&sched);
         } else if (!strncmp(argv[0], "rep", 3)) {
-                trace_handler = &replay_ops;
+                sched.tp_handler = &replay_ops;
                 if (argc) {
                         argc = parse_options(argc, argv, replay_options, replay_usage, 0);
                         if (argc)
                                 usage_with_options(replay_usage, replay_options);
                 }
-                __cmd_replay();
+                return perf_sched__replay(&sched);
         } else {
                 usage_with_options(sched_usage, sched_options);
         }
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 1e60ab70b2b1..1be843aa1546 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -14,6 +14,7 @@
 #include "util/util.h"
 #include "util/evlist.h"
 #include "util/evsel.h"
+#include "util/sort.h"
 #include <linux/bitmap.h>
 
 static char const               *script_name;
@@ -28,11 +29,6 @@ static bool			system_wide;
 static const char               *cpu_list;
 static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
 
-struct perf_script {
-        struct perf_tool    tool;
-        struct perf_session *session;
-};
-
 enum perf_output_field {
         PERF_OUTPUT_COMM            = 1U << 0,
         PERF_OUTPUT_TID             = 1U << 1,
@@ -262,14 +258,11 @@ static int perf_session__check_output_opt(struct perf_session *session)
         return 0;
 }
 
-static void print_sample_start(struct pevent *pevent,
-                               struct perf_sample *sample,
+static void print_sample_start(struct perf_sample *sample,
                                struct thread *thread,
                                struct perf_evsel *evsel)
 {
-        int type;
         struct perf_event_attr *attr = &evsel->attr;
-        struct event_format *event;
         const char *evname = NULL;
         unsigned long secs;
         unsigned long usecs;
@@ -307,20 +300,7 @@ static void print_sample_start(struct pevent *pevent,
         }
 
         if (PRINT_FIELD(EVNAME)) {
-                if (attr->type == PERF_TYPE_TRACEPOINT) {
-                        /*
-                         * XXX Do we really need this here?
-                         * perf_evlist__set_tracepoint_names should have done
-                         * this already
-                         */
-                        type = trace_parse_common_type(pevent,
-                                                       sample->raw_data);
-                        event = pevent_find_event(pevent, type);
-                        if (event)
-                                evname = event->name;
-                } else
-                        evname = perf_evsel__name(evsel);
-
+                evname = perf_evsel__name(evsel);
                 printf("%s: ", evname ? evname : "[unknown]");
         }
 }
@@ -401,7 +381,7 @@ static void print_sample_bts(union perf_event *event,
                         printf(" ");
                 else
                         printf("\n");
-                perf_event__print_ip(event, sample, machine,
+                perf_evsel__print_ip(evsel, event, sample, machine,
                                      PRINT_FIELD(SYM), PRINT_FIELD(DSO),
                                      PRINT_FIELD(SYMOFFSET));
         }
@@ -415,19 +395,17 @@ static void print_sample_bts(union perf_event *event,
         printf("\n");
 }
 
-static void process_event(union perf_event *event __unused,
-                          struct pevent *pevent,
-                          struct perf_sample *sample,
-                          struct perf_evsel *evsel,
-                          struct machine *machine,
-                          struct thread *thread)
+static void process_event(union perf_event *event, struct perf_sample *sample,
+                          struct perf_evsel *evsel, struct machine *machine,
+                          struct addr_location *al)
 {
         struct perf_event_attr *attr = &evsel->attr;
+        struct thread *thread = al->thread;
 
         if (output[attr->type].fields == 0)
                 return;
 
-        print_sample_start(pevent, sample, thread, evsel);
+        print_sample_start(sample, thread, evsel);
 
         if (is_bts_event(attr)) {
                 print_sample_bts(event, sample, evsel, machine, thread);
@@ -435,9 +413,8 @@ static void process_event(union perf_event *event __unused,
         }
 
         if (PRINT_FIELD(TRACE))
-                print_trace_event(pevent, sample->cpu, sample->raw_data,
-                                  sample->raw_size);
-
+                event_format__print(evsel->tp_format, sample->cpu,
+                                    sample->raw_data, sample->raw_size);
         if (PRINT_FIELD(ADDR))
                 print_sample_addr(event, sample, machine, thread, attr);
 
@@ -446,7 +423,7 @@ static void process_event(union perf_event *event __unused,
                         printf(" ");
                 else
                         printf("\n");
-                perf_event__print_ip(event, sample, machine,
+                perf_evsel__print_ip(evsel, event, sample, machine,
                                      PRINT_FIELD(SYM), PRINT_FIELD(DSO),
                                      PRINT_FIELD(SYMOFFSET));
         }
@@ -454,9 +431,9 @@ static void process_event(union perf_event *event __unused,
         printf("\n");
 }
 
-static int default_start_script(const char *script __unused,
-                                int argc __unused,
-                                const char **argv __unused)
+static int default_start_script(const char *script __maybe_unused,
+                                int argc __maybe_unused,
+                                const char **argv __maybe_unused)
 {
         return 0;
 }
@@ -466,8 +443,8 @@ static int default_stop_script(void)
         return 0;
 }
 
-static int default_generate_script(struct pevent *pevent __unused,
-                                   const char *outfile __unused)
+static int default_generate_script(struct pevent *pevent __maybe_unused,
+                                   const char *outfile __maybe_unused)
 {
         return 0;
 }
@@ -498,14 +475,13 @@ static int cleanup_scripting(void)
 
 static const char *input_name;
 
-static int process_sample_event(struct perf_tool *tool __used,
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
                                 union perf_event *event,
                                 struct perf_sample *sample,
                                 struct perf_evsel *evsel,
                                 struct machine *machine)
 {
         struct addr_location al;
-        struct perf_script *scr = container_of(tool, struct perf_script, tool);
         struct thread *thread = machine__findnew_thread(machine, event->ip.tid);
 
         if (thread == NULL) {
@@ -537,32 +513,29 @@ static int process_sample_event(struct perf_tool *tool __used,
         if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
                 return 0;
 
-        scripting_ops->process_event(event, scr->session->pevent,
-                                     sample, evsel, machine, thread);
+        scripting_ops->process_event(event, sample, evsel, machine, &al);
 
         evsel->hists.stats.total_period += sample->period;
         return 0;
 }
 
-static struct perf_script perf_script = {
-        .tool = {
-                .sample          = process_sample_event,
-                .mmap            = perf_event__process_mmap,
-                .comm            = perf_event__process_comm,
-                .exit            = perf_event__process_task,
-                .fork            = perf_event__process_task,
-                .attr            = perf_event__process_attr,
-                .event_type      = perf_event__process_event_type,
-                .tracing_data    = perf_event__process_tracing_data,
-                .build_id        = perf_event__process_build_id,
-                .ordered_samples = true,
-                .ordering_requires_timestamps = true,
-        },
+static struct perf_tool perf_script = {
+        .sample          = process_sample_event,
+        .mmap            = perf_event__process_mmap,
+        .comm            = perf_event__process_comm,
+        .exit            = perf_event__process_task,
+        .fork            = perf_event__process_task,
+        .attr            = perf_event__process_attr,
+        .event_type      = perf_event__process_event_type,
+        .tracing_data    = perf_event__process_tracing_data,
+        .build_id        = perf_event__process_build_id,
+        .ordered_samples = true,
+        .ordering_requires_timestamps = true,
 };
 
 extern volatile int session_done;
 
-static void sig_handler(int sig __unused)
+static void sig_handler(int sig __maybe_unused)
 {
         session_done = 1;
 }
@@ -573,7 +546,7 @@ static int __cmd_script(struct perf_session *session)
 
         signal(SIGINT, sig_handler);
 
-        ret = perf_session__process_events(session, &perf_script.tool);
+        ret = perf_session__process_events(session, &perf_script);
 
         if (debug_mode)
                 pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
@@ -672,8 +645,8 @@ static void list_available_languages(void)
         fprintf(stderr, "\n");
 }
 
-static int parse_scriptname(const struct option *opt __used,
-                            const char *str, int unset __used)
+static int parse_scriptname(const struct option *opt __maybe_unused,
+                            const char *str, int unset __maybe_unused)
 {
         char spec[PATH_MAX];
         const char *script, *ext;
@@ -718,8 +691,8 @@ static int parse_scriptname(const struct option *opt __used,
         return 0;
 }
 
-static int parse_output_fields(const struct option *opt __used,
-                            const char *arg, int unset __used)
+static int parse_output_fields(const struct option *opt __maybe_unused,
+                            const char *arg, int unset __maybe_unused)
 {
         char *tok;
         int i, imax = sizeof(all_output_options) / sizeof(struct output_option);
@@ -1010,8 +983,9 @@ static char *get_script_root(struct dirent *script_dirent, const char *suffix)
         return script_root;
 }
 
-static int list_available_scripts(const struct option *opt __used,
-                                  const char *s __used, int unset __used)
+static int list_available_scripts(const struct option *opt __maybe_unused,
+                                  const char *s __maybe_unused,
+                                  int unset __maybe_unused)
 {
         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
         char scripts_path[MAXPATHLEN];
@@ -1058,6 +1032,61 @@ static int list_available_scripts(const struct option *opt __used,
         exit(0);
 }
 
+/*
+ * Return -1 if none is found, otherwise the actual scripts number.
+ *
+ * Currently the only user of this function is the script browser, which
+ * will list all statically runnable scripts, select one, execute it and
+ * show the output in a perf browser.
+ */
+int find_scripts(char **scripts_array, char **scripts_path_array)
+{
+        struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
+        char scripts_path[MAXPATHLEN];
+        DIR *scripts_dir, *lang_dir;
+        char lang_path[MAXPATHLEN];
+        char *temp;
+        int i = 0;
+
+        snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
+
+        scripts_dir = opendir(scripts_path);
+        if (!scripts_dir)
+                return -1;
+
+        for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
+                snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
+                         lang_dirent.d_name);
+#ifdef NO_LIBPERL
+                if (strstr(lang_path, "perl"))
+                        continue;
+#endif
+#ifdef NO_LIBPYTHON
+                if (strstr(lang_path, "python"))
+                        continue;
+#endif
+
+                lang_dir = opendir(lang_path);
+                if (!lang_dir)
+                        continue;
+
+                for_each_script(lang_path, lang_dir, script_dirent, script_next) {
+                        /* Skip those real time scripts: xxxtop.p[yl] */
+                        if (strstr(script_dirent.d_name, "top."))
+                                continue;
+                        sprintf(scripts_path_array[i], "%s/%s", lang_path,
+                                script_dirent.d_name);
+                        temp = strchr(script_dirent.d_name, '.');
+                        snprintf(scripts_array[i],
+                                (temp - script_dirent.d_name) + 1,
+                                "%s", script_dirent.d_name);
+                        i++;
+                }
+        }
+
+        return i;
+}
+
 static char *get_script_path(const char *script_root, const char *suffix)
 {
         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
@@ -1170,6 +1199,8 @@ static const struct option options[] = {
                      parse_output_fields),
         OPT_BOOLEAN('a', "all-cpus", &system_wide,
                      "system-wide collection from all CPUs"),
+        OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
+                   "only consider these symbols"),
         OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
         OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
                    "only display events for these comms"),
@@ -1181,21 +1212,26 @@ static const struct option options[] = {
         OPT_END()
 };
 
-static bool have_cmd(int argc, const char **argv)
+static int have_cmd(int argc, const char **argv)
 {
         char **__argv = malloc(sizeof(const char *) * argc);
 
-        if (!__argv)
-                die("malloc");
+        if (!__argv) {
+                pr_err("malloc failed\n");
+                return -1;
+        }
+
         memcpy(__argv, argv, sizeof(const char *) * argc);
         argc = parse_options(argc, (const char **)__argv, record_options,
                              NULL, PARSE_OPT_STOP_AT_NON_OPTION);
         free(__argv);
 
-        return argc != 0;
+        system_wide = (argc == 0);
+
+        return 0;
 }
 
-int cmd_script(int argc, const char **argv, const char *prefix __used)
+int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         char *rec_script_path = NULL;
         char *rep_script_path = NULL;
@@ -1259,13 +1295,13 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
 
                 if (pipe(live_pipe) < 0) {
                         perror("failed to create pipe");
-                        exit(-1);
+                        return -1;
                 }
 
                 pid = fork();
                 if (pid < 0) {
                         perror("failed to fork");
-                        exit(-1);
+                        return -1;
                 }
 
                 if (!pid) {
@@ -1277,13 +1313,18 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
                         if (is_top_script(argv[0])) {
                                 system_wide = true;
                         } else if (!system_wide) {
-                                system_wide = !have_cmd(argc - rep_args,
-                                                        &argv[rep_args]);
+                                if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
+                                        err = -1;
+                                        goto out;
+                                }
                         }
 
                         __argv = malloc((argc + 6) * sizeof(const char *));
-                        if (!__argv)
-                                die("malloc");
+                        if (!__argv) {
+                                pr_err("malloc failed\n");
+                                err = -ENOMEM;
+                                goto out;
+                        }
 
                         __argv[j++] = "/bin/sh";
                         __argv[j++] = rec_script_path;
@@ -1305,8 +1346,12 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
                 close(live_pipe[1]);
 
                 __argv = malloc((argc + 4) * sizeof(const char *));
-                if (!__argv)
-                        die("malloc");
+                if (!__argv) {
+                        pr_err("malloc failed\n");
+                        err = -ENOMEM;
+                        goto out;
+                }
+
                 j = 0;
                 __argv[j++] = "/bin/sh";
                 __argv[j++] = rep_script_path;
@@ -1331,12 +1376,20 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
 
                 if (!rec_script_path)
                         system_wide = false;
-                else if (!system_wide)
-                        system_wide = !have_cmd(argc - 1, &argv[1]);
+                else if (!system_wide) {
+                        if (have_cmd(argc - 1, &argv[1]) != 0) {
+                                err = -1;
+                                goto out;
+                        }
+                }
 
                 __argv = malloc((argc + 2) * sizeof(const char *));
-                if (!__argv)
-                        die("malloc");
+                if (!__argv) {
+                        pr_err("malloc failed\n");
+                        err = -ENOMEM;
+                        goto out;
+                }
+
                 __argv[j++] = "/bin/sh";
                 __argv[j++] = script_path;
                 if (system_wide)
@@ -1356,12 +1409,10 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
                 setup_pager();
 
         session = perf_session__new(input_name, O_RDONLY, 0, false,
-                                    &perf_script.tool);
+                                    &perf_script);
         if (session == NULL)
                 return -ENOMEM;
 
-        perf_script.session = session;
-
         if (cpu_list) {
                 if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
                         return -1;
@@ -1387,18 +1438,18 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
                 input = open(session->filename, O_RDONLY);      /* input_name */
                 if (input < 0) {
                         perror("failed to open file");
-                        exit(-1);
+                        return -1;
                 }
 
                 err = fstat(input, &perf_stat);
                 if (err < 0) {
                         perror("failed to stat file");
-                        exit(-1);
+                        return -1;
                 }
 
                 if (!perf_stat.st_size) {
                         fprintf(stderr, "zero-sized file, nothing to do!\n");
-                        exit(0);
+                        return 0;
                 }
 
                 scripting_ops = script_spec__lookup(generate_script_lang);
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 861f0aec77ae..e8cd4d81b06e 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -51,13 +51,13 @@
 #include "util/evsel.h"
 #include "util/debug.h"
 #include "util/color.h"
+#include "util/stat.h"
 #include "util/header.h"
 #include "util/cpumap.h"
 #include "util/thread.h"
 #include "util/thread_map.h"
 
 #include <sys/prctl.h>
-#include <math.h>
 #include <locale.h>
 
 #define DEFAULT_SEPARATOR       " "
@@ -199,11 +199,6 @@ static int			output_fd;
 
 static volatile int done = 0;
 
-struct stats
-{
-        double n, mean, M2;
-};
-
 struct perf_stat {
         struct stats      res_stats[3];
 };
@@ -220,48 +215,14 @@ static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
         evsel->priv = NULL;
 }
 
-static void update_stats(struct stats *stats, u64 val)
-{
-        double delta;
-
-        stats->n++;
-        delta = val - stats->mean;
-        stats->mean += delta / stats->n;
-        stats->M2 += delta*(val - stats->mean);
-}
-
-static double avg_stats(struct stats *stats)
+static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
 {
-        return stats->mean;
+        return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
 }
 
-/*
- * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
- *
- *       (\Sum n_i^2) - ((\Sum n_i)^2)/n
- * s^2 = -------------------------------
- *                  n - 1
- *
- * http://en.wikipedia.org/wiki/Stddev
- *
- * The std dev of the mean is related to the std dev by:
- *
- *             s
- * s_mean = -------
- *          sqrt(n)
- *
- */
-static double stddev_stats(struct stats *stats)
+static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
 {
-        double variance, variance_mean;
-
-        if (!stats->n)
-                return 0.0;
-
-        variance = stats->M2 / (stats->n - 1);
-        variance_mean = variance / stats->n;
-
-        return sqrt(variance_mean);
+        return perf_evsel__cpus(evsel)->nr;
 }
 
 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
@@ -281,13 +242,9 @@ static int create_perf_stat_counter(struct perf_evsel *evsel,
                                     struct perf_evsel *first)
 {
         struct perf_event_attr *attr = &evsel->attr;
-        struct xyarray *group_fd = NULL;
         bool exclude_guest_missing = false;
         int ret;
 
-        if (group && evsel != first)
-                group_fd = first->fd;
-
         if (scale)
                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
@@ -299,8 +256,7 @@ retry:
                 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
 
         if (perf_target__has_cpu(&target)) {
-                ret = perf_evsel__open_per_cpu(evsel, evsel_list->cpus,
-                                               group, group_fd);
+                ret = perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
                 if (ret)
                         goto check_ret;
                 return 0;
@@ -311,8 +267,7 @@ retry:
                 attr->enable_on_exec = 1;
         }
 
-        ret = perf_evsel__open_per_thread(evsel, evsel_list->threads,
-                                          group, group_fd);
+        ret = perf_evsel__open_per_thread(evsel, evsel_list->threads);
         if (!ret)
                 return 0;
         /* fall through */
@@ -382,7 +337,7 @@ static int read_counter_aggr(struct perf_evsel *counter)
         u64 *count = counter->counts->aggr.values;
         int i;
 
-        if (__perf_evsel__read(counter, evsel_list->cpus->nr,
+        if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
                                evsel_list->threads->nr, scale) < 0)
                 return -1;
 
@@ -411,7 +366,7 @@ static int read_counter(struct perf_evsel *counter)
         u64 *count;
         int cpu;
 
-        for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
+        for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
                         return -1;
 
@@ -423,7 +378,7 @@ static int read_counter(struct perf_evsel *counter)
         return 0;
 }
 
-static int run_perf_stat(int argc __used, const char **argv)
+static int run_perf_stat(int argc __maybe_unused, const char **argv)
 {
         unsigned long long t0, t1;
         struct perf_evsel *counter, *first;
@@ -434,7 +389,7 @@ static int run_perf_stat(int argc __used, const char **argv)
 
         if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
                 perror("failed to create pipes");
-                exit(1);
+                return -1;
         }
 
         if (forks) {
@@ -483,7 +438,10 @@ static int run_perf_stat(int argc __used, const char **argv)
                 close(child_ready_pipe[0]);
         }
 
-        first = list_entry(evsel_list->entries.next, struct perf_evsel, node);
+        if (group)
+                perf_evlist__set_leader(evsel_list);
+
+        first = perf_evlist__first(evsel_list);
 
         list_for_each_entry(counter, &evsel_list->entries, node) {
                 if (create_perf_stat_counter(counter, first) < 0) {
@@ -513,13 +471,14 @@ static int run_perf_stat(int argc __used, const char **argv)
                         }
                         if (child_pid != -1)
                                 kill(child_pid, SIGTERM);
-                        die("Not all events could be opened.\n");
+
+                        pr_err("Not all events could be opened.\n");
                         return -1;
                 }
                 counter->supported = true;
         }
 
-        if (perf_evlist__set_filters(evsel_list)) {
+        if (perf_evlist__apply_filters(evsel_list)) {
                 error("failed to set filter with %d (%s)\n", errno,
                         strerror(errno));
                 return -1;
@@ -546,12 +505,12 @@ static int run_perf_stat(int argc __used, const char **argv)
         if (no_aggr) {
                 list_for_each_entry(counter, &evsel_list->entries, node) {
                         read_counter(counter);
-                        perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
+                        perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
                 }
         } else {
                 list_for_each_entry(counter, &evsel_list->entries, node) {
                         read_counter_aggr(counter);
-                        perf_evsel__close_fd(counter, evsel_list->cpus->nr,
+                        perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
                                              evsel_list->threads->nr);
                 }
         }
@@ -561,10 +520,7 @@ static int run_perf_stat(int argc __used, const char **argv)
 
 static void print_noise_pct(double total, double avg)
 {
-        double pct = 0.0;
-
-        if (avg)
-                pct = 100.0*total/avg;
+        double pct = rel_stddev_stats(total, avg);
 
         if (csv_output)
                 fprintf(output, "%s%.2f%%", csv_sep, pct);
@@ -592,7 +548,7 @@ static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
         if (no_aggr)
                 sprintf(cpustr, "CPU%*d%s",
                         csv_output ? 0 : -4,
-                        evsel_list->cpus->map[cpu], csv_sep);
+                        perf_evsel__cpus(evsel)->map[cpu], csv_sep);
 
         fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
 
@@ -636,7 +592,9 @@ static const char *get_ratio_color(enum grc_type type, double ratio)
         return color;
 }
 
-static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_stalled_cycles_frontend(int cpu,
+                                          struct perf_evsel *evsel
+                                          __maybe_unused, double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -653,7 +611,9 @@ static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __us
         fprintf(output, " frontend cycles idle   ");
 }
 
-static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_stalled_cycles_backend(int cpu,
+                                         struct perf_evsel *evsel
+                                         __maybe_unused, double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -670,7 +630,9 @@ static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __use
         fprintf(output, " backend  cycles idle   ");
 }
 
-static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_branch_misses(int cpu,
+                                struct perf_evsel *evsel __maybe_unused,
+                                double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -687,7 +649,9 @@ static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double
         fprintf(output, " of all branches        ");
 }
 
-static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_l1_dcache_misses(int cpu,
+                                   struct perf_evsel *evsel __maybe_unused,
+                                   double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -704,7 +668,9 @@ static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, dou
         fprintf(output, " of all L1-dcache hits  ");
 }
 
-static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_l1_icache_misses(int cpu,
+                                   struct perf_evsel *evsel __maybe_unused,
+                                   double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -721,7 +687,9 @@ static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, dou
         fprintf(output, " of all L1-icache hits  ");
 }
 
-static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_dtlb_cache_misses(int cpu,
+                                    struct perf_evsel *evsel __maybe_unused,
+                                    double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -738,7 +706,9 @@ static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, do
         fprintf(output, " of all dTLB cache hits ");
 }
 
-static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_itlb_cache_misses(int cpu,
+                                    struct perf_evsel *evsel __maybe_unused,
+                                    double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -755,7 +725,9 @@ static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, do
         fprintf(output, " of all iTLB cache hits ");
 }
 
-static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
+static void print_ll_cache_misses(int cpu,
+                                  struct perf_evsel *evsel __maybe_unused,
+                                  double avg)
 {
         double total, ratio = 0.0;
         const char *color;
@@ -788,7 +760,7 @@ static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
         if (no_aggr)
                 sprintf(cpustr, "CPU%*d%s",
                         csv_output ? 0 : -4,
-                        evsel_list->cpus->map[cpu], csv_sep);
+                        perf_evsel__cpus(evsel)->map[cpu], csv_sep);
         else
                 cpu = 0;
 
@@ -949,14 +921,14 @@ static void print_counter(struct perf_evsel *counter)
         u64 ena, run, val;
         int cpu;
 
-        for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
+        for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
                 val = counter->counts->cpu[cpu].val;
                 ena = counter->counts->cpu[cpu].ena;
                 run = counter->counts->cpu[cpu].run;
                 if (run == 0 || ena == 0) {
                         fprintf(output, "CPU%*d%s%*s%s%*s",
                                 csv_output ? 0 : -4,
-                                evsel_list->cpus->map[cpu], csv_sep,
+                                perf_evsel__cpus(counter)->map[cpu], csv_sep,
                                 csv_output ? 0 : 18,
                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
                                 csv_sep,
@@ -1061,8 +1033,8 @@ static const char * const stat_usage[] = {
         NULL
 };
 
-static int stat__set_big_num(const struct option *opt __used,
-                             const char *s __used, int unset)
+static int stat__set_big_num(const struct option *opt __maybe_unused,
+                             const char *s __maybe_unused, int unset)
 {
         big_num_opt = unset ? 0 : 1;
         return 0;
@@ -1156,7 +1128,7 @@ static int add_default_attributes(void)
         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
 }
 
-int cmd_stat(int argc, const char **argv, const char *prefix __used)
+int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         struct perf_evsel *pos;
         int status = -ENOMEM;
@@ -1192,7 +1164,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
                 output = fopen(output_name, mode);
                 if (!output) {
                         perror("failed to create output file");
-                        exit(-1);
+                        return -1;
                 }
                 clock_gettime(CLOCK_REALTIME, &tm);
                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
@@ -1255,7 +1227,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __used)
 
         list_for_each_entry(pos, &evsel_list->entries, node) {
                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
-                    perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0)
+                    perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0)
                         goto out_free_fd;
         }
 
diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c
index 1d592f5cbea9..484f26cc0c00 100644
--- a/tools/perf/builtin-test.c
+++ b/tools/perf/builtin-test.c
@@ -14,11 +14,13 @@
 #include "util/symbol.h"
 #include "util/thread_map.h"
 #include "util/pmu.h"
+#include "event-parse.h"
 #include "../../include/linux/hw_breakpoint.h"
 
 #include <sys/mman.h>
 
-static int vmlinux_matches_kallsyms_filter(struct map *map __used, struct symbol *sym)
+static int vmlinux_matches_kallsyms_filter(struct map *map __maybe_unused,
+                                           struct symbol *sym)
 {
         bool *visited = symbol__priv(sym);
         *visited = true;
@@ -294,7 +296,7 @@ static int test__open_syscall_event(void)
                 goto out_thread_map_delete;
         }
 
-        if (perf_evsel__open_per_thread(evsel, threads, false, NULL) < 0) {
+        if (perf_evsel__open_per_thread(evsel, threads) < 0) {
                 pr_debug("failed to open counter: %s, "
                          "tweak /proc/sys/kernel/perf_event_paranoid?\n",
                          strerror(errno));
@@ -369,7 +371,7 @@ static int test__open_syscall_event_on_all_cpus(void)
                 goto out_thread_map_delete;
         }
 
-        if (perf_evsel__open(evsel, cpus, threads, false, NULL) < 0) {
+        if (perf_evsel__open(evsel, cpus, threads) < 0) {
                 pr_debug("failed to open counter: %s, "
                          "tweak /proc/sys/kernel/perf_event_paranoid?\n",
                          strerror(errno));
@@ -533,7 +535,7 @@ static int test__basic_mmap(void)
 
                 perf_evlist__add(evlist, evsels[i]);
 
-                if (perf_evsel__open(evsels[i], cpus, threads, false, NULL) < 0) {
+                if (perf_evsel__open(evsels[i], cpus, threads) < 0) {
                         pr_debug("failed to open counter: %s, "
                                  "tweak /proc/sys/kernel/perf_event_paranoid?\n",
                                  strerror(errno));
@@ -562,7 +564,7 @@ static int test__basic_mmap(void)
                         goto out_munmap;
                 }
 
-                err = perf_evlist__parse_sample(evlist, event, &sample, false);
+                err = perf_evlist__parse_sample(evlist, event, &sample);
                 if (err) {
                         pr_err("Can't parse sample, err = %d\n", err);
                         goto out_munmap;
@@ -710,7 +712,7 @@ static int test__PERF_RECORD(void)
         /*
          * Config the evsels, setting attr->comm on the first one, etc.
          */
-        evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
+        evsel = perf_evlist__first(evlist);
         evsel->attr.sample_type |= PERF_SAMPLE_CPU;
         evsel->attr.sample_type |= PERF_SAMPLE_TID;
         evsel->attr.sample_type |= PERF_SAMPLE_TIME;
@@ -737,7 +739,7 @@ static int test__PERF_RECORD(void)
          * Call sys_perf_event_open on all the fds on all the evsels,
          * grouping them if asked to.
          */
-        err = perf_evlist__open(evlist, opts.group);
+        err = perf_evlist__open(evlist);
         if (err < 0) {
                 pr_debug("perf_evlist__open: %s\n", strerror(errno));
                 goto out_delete_evlist;
@@ -779,7 +781,7 @@ static int test__PERF_RECORD(void)
                                 if (type < PERF_RECORD_MAX)
                                         nr_events[type]++;
 
-                                err = perf_evlist__parse_sample(evlist, event, &sample, false);
+                                err = perf_evlist__parse_sample(evlist, event, &sample);
                                 if (err < 0) {
                                         if (verbose)
                                                 perf_event__fprintf(event, stderr);
@@ -996,7 +998,9 @@ static u64 mmap_read_self(void *addr)
 /*
  * If the RDPMC instruction faults then signal this back to the test parent task:
  */
-static void segfault_handler(int sig __used, siginfo_t *info __used, void *uc __used)
+static void segfault_handler(int sig __maybe_unused,
+                             siginfo_t *info __maybe_unused,
+                             void *uc __maybe_unused)
 {
         exit(-1);
 }
@@ -1023,14 +1027,16 @@ static int __test__rdpmc(void)
 
         fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
         if (fd < 0) {
-                die("Error: sys_perf_event_open() syscall returned "
-                    "with %d (%s)\n", fd, strerror(errno));
+                pr_err("Error: sys_perf_event_open() syscall returned "
+                       "with %d (%s)\n", fd, strerror(errno));
+                return -1;
         }
 
         addr = mmap(NULL, page_size, PROT_READ, MAP_SHARED, fd, 0);
         if (addr == (void *)(-1)) {
-                die("Error: mmap() syscall returned "
-                    "with (%s)\n", strerror(errno));
+                pr_err("Error: mmap() syscall returned with (%s)\n",
+                       strerror(errno));
+                goto out_close;
         }
 
         for (n = 0; n < 6; n++) {
@@ -1051,9 +1057,9 @@ static int __test__rdpmc(void)
         }
 
         munmap(addr, page_size);
-        close(fd);
-
         pr_debug("   ");
+out_close:
+        close(fd);
 
         if (!delta_sum)
                 return -1;
@@ -1092,6 +1098,309 @@ static int test__perf_pmu(void)
         return perf_pmu__test();
 }
 
+static int perf_evsel__roundtrip_cache_name_test(void)
+{
+        char name[128];
+        int type, op, err = 0, ret = 0, i, idx;
+        struct perf_evsel *evsel;
+        struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
+
+        if (evlist == NULL)
+                return -ENOMEM;
+
+        for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
+                for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
+                        /* skip invalid cache type */
+                        if (!perf_evsel__is_cache_op_valid(type, op))
+                                continue;
+
+                        for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
+                                __perf_evsel__hw_cache_type_op_res_name(type, op, i,
+                                                                        name, sizeof(name));
+                                err = parse_events(evlist, name, 0);
+                                if (err)
+                                        ret = err;
+                        }
+                }
+        }
+
+        idx = 0;
+        evsel = perf_evlist__first(evlist);
+
+        for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
+                for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
+                        /* skip invalid cache type */
+                        if (!perf_evsel__is_cache_op_valid(type, op))
+                                continue;
+
+                        for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
+                                __perf_evsel__hw_cache_type_op_res_name(type, op, i,
+                                                                        name, sizeof(name));
+                                if (evsel->idx != idx)
+                                        continue;
+
+                                ++idx;
+
+                                if (strcmp(perf_evsel__name(evsel), name)) {
+                                        pr_debug("%s != %s\n", perf_evsel__name(evsel), name);
+                                        ret = -1;
+                                }
+
+                                evsel = perf_evsel__next(evsel);
+                        }
+                }
+        }
+
+        perf_evlist__delete(evlist);
+        return ret;
+}
+
+static int __perf_evsel__name_array_test(const char *names[], int nr_names)
+{
+        int i, err;
+        struct perf_evsel *evsel;
+        struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
+
+        if (evlist == NULL)
+                return -ENOMEM;
+
+        for (i = 0; i < nr_names; ++i) {
+                err = parse_events(evlist, names[i], 0);
+                if (err) {
+                        pr_debug("failed to parse event '%s', err %d\n",
+                                 names[i], err);
+                        goto out_delete_evlist;
+                }
+        }
+
+        err = 0;
+        list_for_each_entry(evsel, &evlist->entries, node) {
+                if (strcmp(perf_evsel__name(evsel), names[evsel->idx])) {
+                        --err;
+                        pr_debug("%s != %s\n", perf_evsel__name(evsel), names[evsel->idx]);
+                }
+        }
+
+out_delete_evlist:
+        perf_evlist__delete(evlist);
+        return err;
+}
+
+#define perf_evsel__name_array_test(names) \
+        __perf_evsel__name_array_test(names, ARRAY_SIZE(names))
+
+static int perf_evsel__roundtrip_name_test(void)
+{
+        int err = 0, ret = 0;
+
+        err = perf_evsel__name_array_test(perf_evsel__hw_names);
+        if (err)
+                ret = err;
+
+        err = perf_evsel__name_array_test(perf_evsel__sw_names);
+        if (err)
+                ret = err;
+
+        err = perf_evsel__roundtrip_cache_name_test();
+        if (err)
+                ret = err;
+
+        return ret;
+}
+
+static int perf_evsel__test_field(struct perf_evsel *evsel, const char *name,
+                                  int size, bool should_be_signed)
+{
+        struct format_field *field = perf_evsel__field(evsel, name);
+        int is_signed;
+        int ret = 0;
+
+        if (field == NULL) {
+                pr_debug("%s: \"%s\" field not found!\n", evsel->name, name);
+                return -1;
+        }
+
+        is_signed = !!(field->flags | FIELD_IS_SIGNED);
+        if (should_be_signed && !is_signed) {
+                pr_debug("%s: \"%s\" signedness(%d) is wrong, should be %d\n",
+                         evsel->name, name, is_signed, should_be_signed);
+                ret = -1;
+        }
+
+        if (field->size != size) {
+                pr_debug("%s: \"%s\" size (%d) should be %d!\n",
+                         evsel->name, name, field->size, size);
+                ret = -1;
+        }
+
+        return ret;
+}
+
+static int perf_evsel__tp_sched_test(void)
+{
+        struct perf_evsel *evsel = perf_evsel__newtp("sched", "sched_switch", 0);
+        int ret = 0;
+
+        if (evsel == NULL) {
+                pr_debug("perf_evsel__new\n");
+                return -1;
+        }
+
+        if (perf_evsel__test_field(evsel, "prev_comm", 16, true))
+                ret = -1;
+
+        if (perf_evsel__test_field(evsel, "prev_pid", 4, true))
+                ret = -1;
+
+        if (perf_evsel__test_field(evsel, "prev_prio", 4, true))
+                ret = -1;
+
+        if (perf_evsel__test_field(evsel, "prev_state", 8, true))
+                ret = -1;
+
+        if (perf_evsel__test_field(evsel, "next_comm", 16, true))
+                ret = -1;
+
+        if (perf_evsel__test_field(evsel, "next_pid", 4, true))
+                ret = -1;
+
+        if (perf_evsel__test_field(evsel, "next_prio", 4, true))
+                ret = -1;
+
+        perf_evsel__delete(evsel);
+
+        evsel = perf_evsel__newtp("sched", "sched_wakeup", 0);
+
+        if (perf_evsel__test_field(evsel, "comm", 16, true))
+                ret = -1;
+
+        if (perf_evsel__test_field(evsel, "pid", 4, true))
+                ret = -1;
+
+        if (perf_evsel__test_field(evsel, "prio", 4, true))
+                ret = -1;
+
+        if (perf_evsel__test_field(evsel, "success", 4, true))
+                ret = -1;
+
+        if (perf_evsel__test_field(evsel, "target_cpu", 4, true))
+                ret = -1;
+
+        return ret;
+}
+
+static int test__syscall_open_tp_fields(void)
+{
+        struct perf_record_opts opts = {
+                .target = {
+                        .uid = UINT_MAX,
+                        .uses_mmap = true,
+                },
+                .no_delay   = true,
+                .freq       = 1,
+                .mmap_pages = 256,
+                .raw_samples = true,
+        };
+        const char *filename = "/etc/passwd";
+        int flags = O_RDONLY | O_DIRECTORY;
+        struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
+        struct perf_evsel *evsel;
+        int err = -1, i, nr_events = 0, nr_polls = 0;
+
+        if (evlist == NULL) {
+                pr_debug("%s: perf_evlist__new\n", __func__);
+                goto out;
+        }
+
+        evsel = perf_evsel__newtp("syscalls", "sys_enter_open", 0);
+        if (evsel == NULL) {
+                pr_debug("%s: perf_evsel__newtp\n", __func__);
+                goto out_delete_evlist;
+        }
+
+        perf_evlist__add(evlist, evsel);
+
+        err = perf_evlist__create_maps(evlist, &opts.target);
+        if (err < 0) {
+                pr_debug("%s: perf_evlist__create_maps\n", __func__);
+                goto out_delete_evlist;
+        }
+
+        perf_evsel__config(evsel, &opts, evsel);
+
+        evlist->threads->map[0] = getpid();
+
+        err = perf_evlist__open(evlist);
+        if (err < 0) {
+                pr_debug("perf_evlist__open: %s\n", strerror(errno));
+                goto out_delete_evlist;
+        }
+
+        err = perf_evlist__mmap(evlist, UINT_MAX, false);
+        if (err < 0) {
+                pr_debug("perf_evlist__mmap: %s\n", strerror(errno));
+                goto out_delete_evlist;
+        }
+
+        perf_evlist__enable(evlist);
+
+        /*
+         * Generate the event:
+         */
+        open(filename, flags);
+
+        while (1) {
+                int before = nr_events;
+
+                for (i = 0; i < evlist->nr_mmaps; i++) {
+                        union perf_event *event;
+
+                        while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+                                const u32 type = event->header.type;
+                                int tp_flags;
+                                struct perf_sample sample;
+
+                                ++nr_events;
+
+                                if (type != PERF_RECORD_SAMPLE)
+                                        continue;
+
+                                err = perf_evsel__parse_sample(evsel, event, &sample);
+                                if (err) {
+                                        pr_err("Can't parse sample, err = %d\n", err);
+                                        goto out_munmap;
+                                }
+
+                                tp_flags = perf_evsel__intval(evsel, &sample, "flags");
+
+                                if (flags != tp_flags) {
+                                        pr_debug("%s: Expected flags=%#x, got %#x\n",
+                                                 __func__, flags, tp_flags);
+                                        goto out_munmap;
+                                }
+
+                                goto out_ok;
+                        }
+                }
+
+                if (nr_events == before)
+                        poll(evlist->pollfd, evlist->nr_fds, 10);
+
+                if (++nr_polls > 5) {
+                        pr_debug("%s: no events!\n", __func__);
+                        goto out_munmap;
+                }
+        }
+out_ok:
+        err = 0;
+out_munmap:
+        perf_evlist__munmap(evlist);
+out_delete_evlist:
+        perf_evlist__delete(evlist);
+out:
+        return err;
+}
+
 static struct test {
         const char *desc;
         int (*func)(void);
@@ -1135,6 +1444,18 @@ static struct test {
                 .func = dso__test_data,
         },
         {
+                .desc = "roundtrip evsel->name check",
+                .func = perf_evsel__roundtrip_name_test,
+        },
+        {
+                .desc = "Check parsing of sched tracepoints fields",
+                .func = perf_evsel__tp_sched_test,
+        },
+        {
+                .desc = "Generate and check syscalls:sys_enter_open event fields",
+                .func = test__syscall_open_tp_fields,
+        },
+        {
                 .func = NULL,
         },
 };
@@ -1199,7 +1520,7 @@ static int perf_test__list(int argc, const char **argv)
         return 0;
 }
 
-int cmd_test(int argc, const char **argv, const char *prefix __used)
+int cmd_test(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         const char * const test_usage[] = {
         "perf test [<options>] [{list <test-name-fragment>|[<test-name-fragments>|<test-numbers>]}]",
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 3b75b2e21ea5..b1a8a3b841cc 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -168,9 +168,8 @@ static struct per_pid *find_create_pid(int pid)
                         return cursor;
                 cursor = cursor->next;
         }
-        cursor = malloc(sizeof(struct per_pid));
+        cursor = zalloc(sizeof(*cursor));
         assert(cursor != NULL);
-        memset(cursor, 0, sizeof(struct per_pid));
         cursor->pid = pid;
         cursor->next = all_data;
         all_data = cursor;
@@ -195,9 +194,8 @@ static void pid_set_comm(int pid, char *comm)
                 }
                 c = c->next;
         }
-        c = malloc(sizeof(struct per_pidcomm));
+        c = zalloc(sizeof(*c));
         assert(c != NULL);
-        memset(c, 0, sizeof(struct per_pidcomm));
         c->comm = strdup(comm);
         p->current = c;
         c->next = p->all;
@@ -239,17 +237,15 @@ pid_put_sample(int pid, int type, unsigned int cpu, u64 start, u64 end)
         p = find_create_pid(pid);
         c = p->current;
         if (!c) {
-                c = malloc(sizeof(struct per_pidcomm));
+                c = zalloc(sizeof(*c));
                 assert(c != NULL);
-                memset(c, 0, sizeof(struct per_pidcomm));
                 p->current = c;
                 c->next = p->all;
                 p->all = c;
         }
 
-        sample = malloc(sizeof(struct cpu_sample));
+        sample = zalloc(sizeof(*sample));
         assert(sample != NULL);
-        memset(sample, 0, sizeof(struct cpu_sample));
         sample->start_time = start;
         sample->end_time = end;
         sample->type = type;
@@ -275,28 +271,28 @@ static int cpus_cstate_state[MAX_CPUS];
 static u64 cpus_pstate_start_times[MAX_CPUS];
 static u64 cpus_pstate_state[MAX_CPUS];
 
-static int process_comm_event(struct perf_tool *tool __used,
+static int process_comm_event(struct perf_tool *tool __maybe_unused,
                               union perf_event *event,
-                              struct perf_sample *sample __used,
-                              struct machine *machine __used)
+                              struct perf_sample *sample __maybe_unused,
+                              struct machine *machine __maybe_unused)
 {
         pid_set_comm(event->comm.tid, event->comm.comm);
         return 0;
 }
 
-static int process_fork_event(struct perf_tool *tool __used,
+static int process_fork_event(struct perf_tool *tool __maybe_unused,
                               union perf_event *event,
-                              struct perf_sample *sample __used,
-                              struct machine *machine __used)
+                              struct perf_sample *sample __maybe_unused,
+                              struct machine *machine __maybe_unused)
 {
         pid_fork(event->fork.pid, event->fork.ppid, event->fork.time);
         return 0;
 }
 
-static int process_exit_event(struct perf_tool *tool __used,
+static int process_exit_event(struct perf_tool *tool __maybe_unused,
                               union perf_event *event,
-                              struct perf_sample *sample __used,
-                              struct machine *machine __used)
+                              struct perf_sample *sample __maybe_unused,
+                              struct machine *machine __maybe_unused)
 {
         pid_exit(event->fork.pid, event->fork.time);
         return 0;
@@ -373,11 +369,10 @@ static void c_state_start(int cpu, u64 timestamp, int state)
 
 static void c_state_end(int cpu, u64 timestamp)
 {
-        struct power_event *pwr;
-        pwr = malloc(sizeof(struct power_event));
+        struct power_event *pwr = zalloc(sizeof(*pwr));
+
         if (!pwr)
                 return;
-        memset(pwr, 0, sizeof(struct power_event));
 
         pwr->state = cpus_cstate_state[cpu];
         pwr->start_time = cpus_cstate_start_times[cpu];
@@ -392,14 +387,13 @@ static void c_state_end(int cpu, u64 timestamp)
 static void p_state_change(int cpu, u64 timestamp, u64 new_freq)
 {
         struct power_event *pwr;
-        pwr = malloc(sizeof(struct power_event));
 
         if (new_freq > 8000000) /* detect invalid data */
                 return;
 
+        pwr = zalloc(sizeof(*pwr));
         if (!pwr)
                 return;
-        memset(pwr, 0, sizeof(struct power_event));
 
         pwr->state = cpus_pstate_state[cpu];
         pwr->start_time = cpus_pstate_start_times[cpu];
@@ -429,15 +423,13 @@ static void p_state_change(int cpu, u64 timestamp, u64 new_freq)
 static void
 sched_wakeup(int cpu, u64 timestamp, int pid, struct trace_entry *te)
 {
-        struct wake_event *we;
         struct per_pid *p;
         struct wakeup_entry *wake = (void *)te;
+        struct wake_event *we = zalloc(sizeof(*we));
 
-        we = malloc(sizeof(struct wake_event));
         if (!we)
                 return;
 
-        memset(we, 0, sizeof(struct wake_event));
         we->time = timestamp;
         we->waker = pid;
 
@@ -491,11 +483,11 @@ static void sched_switch(int cpu, u64 timestamp, struct trace_entry *te)
 }
 
 
-static int process_sample_event(struct perf_tool *tool __used,
-                                union perf_event *event __used,
+static int process_sample_event(struct perf_tool *tool __maybe_unused,
+                                union perf_event *event __maybe_unused,
                                 struct perf_sample *sample,
                                 struct perf_evsel *evsel,
-                                struct machine *machine __used)
+                                struct machine *machine __maybe_unused)
 {
         struct trace_entry *te;
 
@@ -579,13 +571,12 @@ static void end_sample_processing(void)
         struct power_event *pwr;
 
         for (cpu = 0; cpu <= numcpus; cpu++) {
-                pwr = malloc(sizeof(struct power_event));
+                /* C state */
+#if 0
+                pwr = zalloc(sizeof(*pwr));
                 if (!pwr)
                         return;
-                memset(pwr, 0, sizeof(struct power_event));
 
-                /* C state */
-#if 0
                 pwr->state = cpus_cstate_state[cpu];
                 pwr->start_time = cpus_cstate_start_times[cpu];
                 pwr->end_time = last_time;
@@ -597,10 +588,9 @@ static void end_sample_processing(void)
 #endif
                 /* P state */
 
-                pwr = malloc(sizeof(struct power_event));
+                pwr = zalloc(sizeof(*pwr));
                 if (!pwr)
                         return;
-                memset(pwr, 0, sizeof(struct power_event));
 
                 pwr->state = cpus_pstate_state[cpu];
                 pwr->start_time = cpus_pstate_start_times[cpu];
@@ -830,11 +820,9 @@ static void draw_process_bars(void)
 
 static void add_process_filter(const char *string)
 {
-        struct process_filter *filt;
-        int pid;
+        int pid = strtoull(string, NULL, 10);
+        struct process_filter *filt = malloc(sizeof(*filt));
 
-        pid = strtoull(string, NULL, 10);
-        filt = malloc(sizeof(struct process_filter));
         if (!filt)
                 return;
 
@@ -1081,7 +1069,8 @@ static int __cmd_record(int argc, const char **argv)
 }
 
 static int
-parse_process(const struct option *opt __used, const char *arg, int __used unset)
+parse_process(const struct option *opt __maybe_unused, const char *arg,
+              int __maybe_unused unset)
 {
         if (arg)
                 add_process_filter(arg);
@@ -1106,7 +1095,8 @@ static const struct option options[] = {
 };
 
 
-int cmd_timechart(int argc, const char **argv, const char *prefix __used)
+int cmd_timechart(int argc, const char **argv,
+                  const char *prefix __maybe_unused)
 {
         argc = parse_options(argc, argv, options, timechart_usage,
                         PARSE_OPT_STOP_AT_NON_OPTION);
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 68cd61ef6ac5..e434a16bb5ac 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -95,7 +95,8 @@ static void perf_top__update_print_entries(struct perf_top *top)
                 top->print_entries -= 9;
 }
 
-static void perf_top__sig_winch(int sig __used, siginfo_t *info __used, void *arg)
+static void perf_top__sig_winch(int sig __maybe_unused,
+                                siginfo_t *info __maybe_unused, void *arg)
 {
         struct perf_top *top = arg;
 
@@ -509,7 +510,7 @@ static void perf_top__handle_keypress(struct perf_top *top, int c)
                                 prompt_integer(&counter, "Enter details event counter");
 
                                 if (counter >= top->evlist->nr_entries) {
-                                        top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
+                                        top->sym_evsel = perf_evlist__first(top->evlist);
                                         fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
                                         sleep(1);
                                         break;
@@ -518,7 +519,7 @@ static void perf_top__handle_keypress(struct perf_top *top, int c)
                                         if (top->sym_evsel->idx == counter)
                                                 break;
                         } else
-                                top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
+                                top->sym_evsel = perf_evlist__first(top->evlist);
                         break;
                 case 'f':
                         prompt_integer(&top->count_filter, "Enter display event count filter");
@@ -663,7 +664,7 @@ static const char *skip_symbols[] = {
         NULL
 };
 
-static int symbol_filter(struct map *map __used, struct symbol *sym)
+static int symbol_filter(struct map *map __maybe_unused, struct symbol *sym)
 {
         const char *name = sym->name;
         int i;
@@ -783,8 +784,10 @@ static void perf_event__process_sample(struct perf_tool *tool,
 
                 if ((sort__has_parent || symbol_conf.use_callchain) &&
                     sample->callchain) {
-                        err = machine__resolve_callchain(machine, al.thread,
-                                                         sample->callchain, &parent);
+                        err = machine__resolve_callchain(machine, evsel,
+                                                         al.thread, sample,
+                                                         &parent);
+
                         if (err)
                                 return;
                 }
@@ -820,7 +823,7 @@ static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
         int ret;
 
         while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
-                ret = perf_evlist__parse_sample(top->evlist, event, &sample, false);
+                ret = perf_evlist__parse_sample(top->evlist, event, &sample);
                 if (ret) {
                         pr_err("Can't parse sample, err = %d\n", ret);
                         continue;
@@ -884,17 +887,14 @@ static void perf_top__mmap_read(struct perf_top *top)
 
 static void perf_top__start_counters(struct perf_top *top)
 {
-        struct perf_evsel *counter, *first;
+        struct perf_evsel *counter;
         struct perf_evlist *evlist = top->evlist;
 
-        first = list_entry(evlist->entries.next, struct perf_evsel, node);
+        if (top->group)
+                perf_evlist__set_leader(evlist);
 
         list_for_each_entry(counter, &evlist->entries, node) {
                 struct perf_event_attr *attr = &counter->attr;
-                struct xyarray *group_fd = NULL;
-
-                if (top->group && counter != first)
-                        group_fd = first->fd;
 
                 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
 
@@ -925,8 +925,7 @@ retry_sample_id:
                 attr->sample_id_all = top->sample_id_all_missing ? 0 : 1;
 try_again:
                 if (perf_evsel__open(counter, top->evlist->cpus,
-                                     top->evlist->threads, top->group,
-                                     group_fd) < 0) {
+                                     top->evlist->threads) < 0) {
                         int err = errno;
 
                         if (err == EPERM || err == EACCES) {
@@ -1165,7 +1164,7 @@ static const char * const top_usage[] = {
         NULL
 };
 
-int cmd_top(int argc, const char **argv, const char *prefix __used)
+int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
 {
         struct perf_evsel *pos;
         int status;
@@ -1328,7 +1327,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
                         pos->attr.sample_period = top.default_interval;
         }
 
-        top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
+        top.sym_evsel = perf_evlist__first(top.evlist);
 
         symbol_conf.priv_size = sizeof(struct annotation);
 
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
new file mode 100644
index 000000000000..8f113dab8bf1
--- /dev/null
+++ b/tools/perf/builtin-trace.c
@@ -0,0 +1,310 @@
+#include "builtin.h"
+#include "util/evlist.h"
+#include "util/parse-options.h"
+#include "util/thread_map.h"
+#include "event-parse.h"
+
+#include <libaudit.h>
+#include <stdlib.h>
+
+static struct syscall_fmt {
+        const char *name;
+        const char *alias;
+        bool       errmsg;
+        bool       timeout;
+} syscall_fmts[] = {
+        { .name     = "arch_prctl", .errmsg = true, .alias = "prctl", },
+        { .name     = "fstat",      .errmsg = true, .alias = "newfstat", },
+        { .name     = "fstatat",    .errmsg = true, .alias = "newfstatat", },
+        { .name     = "futex",      .errmsg = true, },
+        { .name     = "poll",       .errmsg = true, .timeout = true, },
+        { .name     = "ppoll",      .errmsg = true, .timeout = true, },
+        { .name     = "read",       .errmsg = true, },
+        { .name     = "recvfrom",   .errmsg = true, },
+        { .name     = "select",     .errmsg = true, .timeout = true, },
+        { .name     = "stat",       .errmsg = true, .alias = "newstat", },
+};
+
+static int syscall_fmt__cmp(const void *name, const void *fmtp)
+{
+        const struct syscall_fmt *fmt = fmtp;
+        return strcmp(name, fmt->name);
+}
+
+static struct syscall_fmt *syscall_fmt__find(const char *name)
+{
+        const int nmemb = ARRAY_SIZE(syscall_fmts);
+        return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
+}
+
+struct syscall {
+        struct event_format *tp_format;
+        const char          *name;
+        struct syscall_fmt  *fmt;
+};
+
+struct trace {
+        int                     audit_machine;
+        struct {
+                int             max;
+                struct syscall  *table;
+        } syscalls;
+        struct perf_record_opts opts;
+};
+
+static int trace__read_syscall_info(struct trace *trace, int id)
+{
+        char tp_name[128];
+        struct syscall *sc;
+
+        if (id > trace->syscalls.max) {
+                struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
+
+                if (nsyscalls == NULL)
+                        return -1;
+
+                if (trace->syscalls.max != -1) {
+                        memset(nsyscalls + trace->syscalls.max + 1, 0,
+                               (id - trace->syscalls.max) * sizeof(*sc));
+                } else {
+                        memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
+                }
+
+                trace->syscalls.table = nsyscalls;
+                trace->syscalls.max   = id;
+        }
+
+        sc = trace->syscalls.table + id;
+        sc->name = audit_syscall_to_name(id, trace->audit_machine);
+        if (sc->name == NULL)
+                return -1;
+
+        sc->fmt = syscall_fmt__find(sc->name);
+
+        snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
+        sc->tp_format = event_format__new("syscalls", tp_name);
+
+        if (sc->tp_format == NULL && sc->fmt && sc->fmt->alias) {
+                snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
+                sc->tp_format = event_format__new("syscalls", tp_name);
+        }
+
+        return sc->tp_format != NULL ? 0 : -1;
+}
+
+static size_t syscall__fprintf_args(struct syscall *sc, unsigned long *args, FILE *fp)
+{
+        int i = 0;
+        size_t printed = 0;
+
+        if (sc->tp_format != NULL) {
+                struct format_field *field;
+
+                for (field = sc->tp_format->format.fields->next; field; field = field->next) {
+                        printed += fprintf(fp, "%s%s: %ld", printed ? ", " : "",
+                                           field->name, args[i++]);
+                }
+        } else {
+                while (i < 6) {
+                        printed += fprintf(fp, "%sarg%d: %ld", printed ? ", " : "", i, args[i]);
+                        ++i;
+                }
+        }
+
+        return printed;
+}
+
+static int trace__run(struct trace *trace)
+{
+        struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
+        struct perf_evsel *evsel, *evsel_enter, *evsel_exit;
+        int err = -1, i, nr_events = 0, before;
+
+        if (evlist == NULL) {
+                printf("Not enough memory to run!\n");
+                goto out;
+        }
+
+        evsel_enter = perf_evsel__newtp("raw_syscalls", "sys_enter", 0);
+        if (evsel_enter == NULL) {
+                printf("Couldn't read the raw_syscalls:sys_enter tracepoint information!\n");
+                goto out_delete_evlist;
+        }
+
+        perf_evlist__add(evlist, evsel_enter);
+
+        evsel_exit = perf_evsel__newtp("raw_syscalls", "sys_exit", 1);
+        if (evsel_exit == NULL) {
+                printf("Couldn't read the raw_syscalls:sys_exit tracepoint information!\n");
+                goto out_delete_evlist;
+        }
+
+        perf_evlist__add(evlist, evsel_exit);
+
+        err = perf_evlist__create_maps(evlist, &trace->opts.target);
+        if (err < 0) {
+                printf("Problems parsing the target to trace, check your options!\n");
+                goto out_delete_evlist;
+        }
+
+        perf_evlist__config_attrs(evlist, &trace->opts);
+
+        err = perf_evlist__open(evlist);
+        if (err < 0) {
+                printf("Couldn't create the events: %s\n", strerror(errno));
+                goto out_delete_evlist;
+        }
+
+        err = perf_evlist__mmap(evlist, UINT_MAX, false);
+        if (err < 0) {
+                printf("Couldn't mmap the events: %s\n", strerror(errno));
+                goto out_delete_evlist;
+        }
+
+        perf_evlist__enable(evlist);
+again:
+        before = nr_events;
+
+        for (i = 0; i < evlist->nr_mmaps; i++) {
+                union perf_event *event;
+
+                while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
+                        const u32 type = event->header.type;
+                        struct syscall *sc;
+                        struct perf_sample sample;
+                        int id;
+
+                        ++nr_events;
+
+                        switch (type) {
+                        case PERF_RECORD_SAMPLE:
+                                break;
+                        case PERF_RECORD_LOST:
+                                printf("LOST %" PRIu64 " events!\n", event->lost.lost);
+                                continue;
+                        default:
+                                printf("Unexpected %s event, skipping...\n",
+                                        perf_event__name(type));
+                                continue;
+                        }
+
+                        err = perf_evlist__parse_sample(evlist, event, &sample);
+                        if (err) {
+                                printf("Can't parse sample, err = %d, skipping...\n", err);
+                                continue;
+                        }
+
+                        evsel = perf_evlist__id2evsel(evlist, sample.id);
+                        if (evsel == NULL) {
+                                printf("Unknown tp ID %" PRIu64 ", skipping...\n", sample.id);
+                                continue;
+                        }
+
+                        id = perf_evsel__intval(evsel, &sample, "id");
+                        if (id < 0) {
+                                printf("Invalid syscall %d id, skipping...\n", id);
+                                continue;
+                        }
+
+                        if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
+                            trace__read_syscall_info(trace, id))
+                                continue;
+
+                        if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
+                                continue;
+
+                        sc = &trace->syscalls.table[id];
+
+                        if (evlist->threads->map[0] == -1 || evlist->threads->nr > 1)
+                                printf("%d ", sample.tid);
+
+                        if (evsel == evsel_enter) {
+                                void *args = perf_evsel__rawptr(evsel, &sample, "args");
+
+                                printf("%s(", sc->name);
+                                syscall__fprintf_args(sc, args, stdout);
+                        } else if (evsel == evsel_exit) {
+                                int ret = perf_evsel__intval(evsel, &sample, "ret");
+
+                                if (ret < 0 && sc->fmt && sc->fmt->errmsg) {
+                                        char bf[256];
+                                        const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
+                                                   *e = audit_errno_to_name(-ret);
+
+                                        printf(") = -1 %s %s", e, emsg);
+                                } else if (ret == 0 && sc->fmt && sc->fmt->timeout)
+                                        printf(") = 0 Timeout");
+                                else
+                                        printf(") = %d", ret);
+
+                                putchar('\n');
+                        }
+                }
+        }
+
+        if (nr_events == before)
+                poll(evlist->pollfd, evlist->nr_fds, -1);
+
+        goto again;
+
+out_delete_evlist:
+        perf_evlist__delete(evlist);
+out:
+        return err;
+}
+
+int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
+{
+        const char * const trace_usage[] = {
+                "perf trace [<options>]",
+                NULL
+        };
+        struct trace trace = {
+                .audit_machine = audit_detect_machine(),
+                .syscalls = {
+                        . max = -1,
+                },
+                .opts = {
+                        .target = {
+                                .uid       = UINT_MAX,
+                                .uses_mmap = true,
+                        },
+                        .user_freq     = UINT_MAX,
+                        .user_interval = ULLONG_MAX,
+                        .no_delay      = true,
+                        .mmap_pages    = 1024,
+                },
+        };
+        const struct option trace_options[] = {
+        OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
+                    "trace events on existing process id"),
+        OPT_STRING(0, "tid", &trace.opts.target.tid, "tid",
+                    "trace events on existing thread id"),
+        OPT_BOOLEAN(0, "all-cpus", &trace.opts.target.system_wide,
+                    "system-wide collection from all CPUs"),
+        OPT_STRING(0, "cpu", &trace.opts.target.cpu_list, "cpu",
+                    "list of cpus to monitor"),
+        OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
+                    "child tasks do not inherit counters"),
+        OPT_UINTEGER(0, "mmap-pages", &trace.opts.mmap_pages,
+                     "number of mmap data pages"),
+        OPT_STRING(0, "uid", &trace.opts.target.uid_str, "user",
+                   "user to profile"),
+        OPT_END()
+        };
+        int err;
+
+        argc = parse_options(argc, argv, trace_options, trace_usage, 0);
+        if (argc)
+                usage_with_options(trace_usage, trace_options);
+
+        err = perf_target__parse_uid(&trace.opts.target);
+        if (err) {
+                char bf[BUFSIZ];
+                perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
+                printf("%s", bf);
+                return err;
+        }
+
+        return trace__run(&trace);
+}
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
index b382bd551aac..08143bd854c7 100644
--- a/tools/perf/builtin.h
+++ b/tools/perf/builtin.h
@@ -34,6 +34,8 @@ extern int cmd_kmem(int argc, const char **argv, const char *prefix);
 extern int cmd_lock(int argc, const char **argv, const char *prefix);
 extern int cmd_kvm(int argc, const char **argv, const char *prefix);
 extern int cmd_test(int argc, const char **argv, const char *prefix);
+extern int cmd_trace(int argc, const char **argv, const char *prefix);
 extern int cmd_inject(int argc, const char **argv, const char *prefix);
 
+extern int find_scripts(char **scripts_array, char **scripts_path_array);
 #endif
diff --git a/tools/perf/command-list.txt b/tools/perf/command-list.txt
index d695fe40fbff..3e86bbd8c2d5 100644
--- a/tools/perf/command-list.txt
+++ b/tools/perf/command-list.txt
@@ -17,8 +17,9 @@ perf-report			mainporcelain common
 perf-stat                       mainporcelain common
 perf-timechart                  mainporcelain common
 perf-top                        mainporcelain common
+perf-trace                      mainporcelain common
 perf-script                     mainporcelain common
-perf-probe                      mainporcelain common
+perf-probe                      mainporcelain full
 perf-kmem                       mainporcelain common
 perf-lock                       mainporcelain common
 perf-kvm                        mainporcelain common
diff --git a/tools/perf/config/feature-tests.mak b/tools/perf/config/feature-tests.mak
index 6c18785a6417..4add41bb0c7e 100644
--- a/tools/perf/config/feature-tests.mak
+++ b/tools/perf/config/feature-tests.mak
@@ -154,3 +154,53 @@ int main(void)
         return 0;
 }
 endef
+
+ifndef NO_LIBUNWIND
+define SOURCE_LIBUNWIND
+#include <libunwind.h>
+#include <stdlib.h>
+
+extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+                                      unw_word_t ip,
+                                      unw_dyn_info_t *di,
+                                      unw_proc_info_t *pi,
+                                      int need_unwind_info, void *arg);
+
+
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+
+int main(void)
+{
+        unw_addr_space_t addr_space;
+        addr_space = unw_create_addr_space(NULL, 0);
+        unw_init_remote(NULL, addr_space, NULL);
+        dwarf_search_unwind_table(addr_space, 0, NULL, NULL, 0, NULL);
+        return 0;
+}
+endef
+endif
+
+ifndef NO_BACKTRACE
+define SOURCE_BACKTRACE
+#include <execinfo.h>
+#include <stdio.h>
+
+int main(void)
+{
+        backtrace(NULL, 0);
+        backtrace_symbols(NULL, 0);
+        return 0;
+}
+endef
+endif
+
+ifndef NO_LIBAUDIT
+define SOURCE_LIBAUDIT
+#include <libaudit.h>
+
+int main(void)
+{
+        return audit_open();
+}
+endef
+endif
\ No newline at end of file
diff --git a/tools/perf/perf-archive.sh b/tools/perf/perf-archive.sh
index 95b6f8b6177a..e91930620269 100644
--- a/tools/perf/perf-archive.sh
+++ b/tools/perf/perf-archive.sh
@@ -24,7 +24,7 @@ NOBUILDID=0000000000000000000000000000000000000000
 perf buildid-list -i $PERF_DATA --with-hits | grep -v "^$NOBUILDID " > $BUILDIDS
 if [ ! -s $BUILDIDS ] ; then
         echo "perf archive: no build-ids found"
-        rm -f $BUILDIDS
+        rm $BUILDIDS || true
         exit 1
 fi
 
@@ -39,8 +39,8 @@ while read build_id ; do
         echo ${filename#$PERF_BUILDID_LINKDIR} >> $MANIFEST
 done
 
-tar cfj $PERF_DATA.tar.bz2 -C $PERF_BUILDID_DIR -T $MANIFEST
-rm -f $MANIFEST $BUILDIDS
+tar cjf $PERF_DATA.tar.bz2 -C $PERF_BUILDID_DIR -T $MANIFEST
+rm $MANIFEST $BUILDIDS || true
 echo -e "Now please run:\n"
 echo -e "$ tar xvf $PERF_DATA.tar.bz2 -C ~/.debug\n"
 echo "wherever you need to run 'perf report' on."
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 2b2e225a4d4c..fc2f770e3027 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -14,6 +14,7 @@
 #include "util/run-command.h"
 #include "util/parse-events.h"
 #include "util/debugfs.h"
+#include <pthread.h>
 
 const char perf_usage_string[] =
         "perf [--version] [--help] COMMAND [ARGS]";
@@ -24,6 +25,42 @@ const char perf_more_info_string[] =
 int use_browser = -1;
 static int use_pager = -1;
 
+struct cmd_struct {
+        const char *cmd;
+        int (*fn)(int, const char **, const char *);
+        int option;
+};
+
+static struct cmd_struct commands[] = {
+        { "buildid-cache", cmd_buildid_cache, 0 },
+        { "buildid-list", cmd_buildid_list, 0 },
+        { "diff",       cmd_diff,       0 },
+        { "evlist",     cmd_evlist,     0 },
+        { "help",       cmd_help,       0 },
+        { "list",       cmd_list,       0 },
+        { "record",     cmd_record,     0 },
+        { "report",     cmd_report,     0 },
+        { "bench",      cmd_bench,      0 },
+        { "stat",       cmd_stat,       0 },
+        { "timechart",  cmd_timechart,  0 },
+        { "top",        cmd_top,        0 },
+        { "annotate",   cmd_annotate,   0 },
+        { "version",    cmd_version,    0 },
+        { "script",     cmd_script,     0 },
+        { "sched",      cmd_sched,      0 },
+#ifndef NO_LIBELF_SUPPORT
+        { "probe",      cmd_probe,      0 },
+#endif
+        { "kmem",       cmd_kmem,       0 },
+        { "lock",       cmd_lock,       0 },
+        { "kvm",        cmd_kvm,        0 },
+        { "test",       cmd_test,       0 },
+#ifndef NO_LIBAUDIT_SUPPORT
+        { "trace",      cmd_trace,      0 },
+#endif
+        { "inject",     cmd_inject,     0 },
+};
+
 struct pager_config {
         const char *cmd;
         int val;
@@ -160,6 +197,14 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
                         fprintf(stderr, "dir: %s\n", debugfs_mountpoint);
                         if (envchanged)
                                 *envchanged = 1;
+                } else if (!strcmp(cmd, "--list-cmds")) {
+                        unsigned int i;
+
+                        for (i = 0; i < ARRAY_SIZE(commands); i++) {
+                                struct cmd_struct *p = commands+i;
+                                printf("%s ", p->cmd);
+                        }
+                        exit(0);
                 } else {
                         fprintf(stderr, "Unknown option: %s\n", cmd);
                         usage(perf_usage_string);
@@ -245,12 +290,6 @@ const char perf_version_string[] = PERF_VERSION;
  */
 #define NEED_WORK_TREE  (1<<2)
 
-struct cmd_struct {
-        const char *cmd;
-        int (*fn)(int, const char **, const char *);
-        int option;
-};
-
 static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 {
         int status;
@@ -296,30 +335,6 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
 static void handle_internal_command(int argc, const char **argv)
 {
         const char *cmd = argv[0];
-        static struct cmd_struct commands[] = {
-                { "buildid-cache", cmd_buildid_cache, 0 },
-                { "buildid-list", cmd_buildid_list, 0 },
-                { "diff",       cmd_diff,       0 },
-                { "evlist",     cmd_evlist,     0 },
-                { "help",       cmd_help,       0 },
-                { "list",       cmd_list,       0 },
-                { "record",     cmd_record,     0 },
-                { "report",     cmd_report,     0 },
-                { "bench",      cmd_bench,      0 },
-                { "stat",       cmd_stat,       0 },
-                { "timechart",  cmd_timechart,  0 },
-                { "top",        cmd_top,        0 },
-                { "annotate",   cmd_annotate,   0 },
-                { "version",    cmd_version,    0 },
-                { "script",     cmd_script,     0 },
-                { "sched",      cmd_sched,      0 },
-                { "probe",      cmd_probe,      0 },
-                { "kmem",       cmd_kmem,       0 },
-                { "lock",       cmd_lock,       0 },
-                { "kvm",        cmd_kvm,        0 },
-                { "test",       cmd_test,       0 },
-                { "inject",     cmd_inject,     0 },
-        };
         unsigned int i;
         static const char ext[] = STRIP_EXTENSION;
 
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index f960ccb2edc6..a89cbbb61801 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -88,6 +88,12 @@ void get_term_dimensions(struct winsize *ws);
 #define CPUINFO_PROC    "Processor"
 #endif
 
+#ifdef __aarch64__
+#include "../../arch/arm64/include/asm/unistd.h"
+#define rmb()           asm volatile("dmb ld" ::: "memory")
+#define cpu_relax()     asm volatile("yield" ::: "memory")
+#endif
+
 #ifdef __mips__
 #include "../../arch/mips/include/asm/unistd.h"
 #define rmb()           asm volatile(                                   \
@@ -209,9 +215,15 @@ void pthread__unblock_sigwinch(void);
 
 #include "util/target.h"
 
+enum perf_call_graph_mode {
+        CALLCHAIN_NONE,
+        CALLCHAIN_FP,
+        CALLCHAIN_DWARF
+};
+
 struct perf_record_opts {
         struct perf_target target;
-        bool         call_graph;
+        int          call_graph;
         bool         group;
         bool         inherit_stat;
         bool         no_delay;
@@ -230,6 +242,7 @@ struct perf_record_opts {
         u64          branch_stack;
         u64          default_interval;
         u64          user_interval;
+        u16          stack_dump_size;
 };
 
 #endif
diff --git a/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py b/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py
new file mode 100755
index 000000000000..9e0985794e20
--- /dev/null
+++ b/tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py
@@ -0,0 +1,94 @@
+# EventClass.py
+#
+# This is a library defining some events types classes, which could
+# be used by other scripts to analyzing the perf samples.
+#
+# Currently there are just a few classes defined for examples,
+# PerfEvent is the base class for all perf event sample, PebsEvent
+# is a HW base Intel x86 PEBS event, and user could add more SW/HW
+# event classes based on requirements.
+
+import struct
+
+# Event types, user could add more here
+EVTYPE_GENERIC  = 0
+EVTYPE_PEBS     = 1     # Basic PEBS event
+EVTYPE_PEBS_LL  = 2     # PEBS event with load latency info
+EVTYPE_IBS      = 3
+
+#
+# Currently we don't have good way to tell the event type, but by
+# the size of raw buffer, raw PEBS event with load latency data's
+# size is 176 bytes, while the pure PEBS event's size is 144 bytes.
+#
+def create_event(name, comm, dso, symbol, raw_buf):
+        if (len(raw_buf) == 144):
+                event = PebsEvent(name, comm, dso, symbol, raw_buf)
+        elif (len(raw_buf) == 176):
+                event = PebsNHM(name, comm, dso, symbol, raw_buf)
+        else:
+                event = PerfEvent(name, comm, dso, symbol, raw_buf)
+
+        return event
+
+class PerfEvent(object):
+        event_num = 0
+        def __init__(self, name, comm, dso, symbol, raw_buf, ev_type=EVTYPE_GENERIC):
+                self.name       = name
+                self.comm       = comm
+                self.dso        = dso
+                self.symbol     = symbol
+                self.raw_buf    = raw_buf
+                self.ev_type    = ev_type
+                PerfEvent.event_num += 1
+
+        def show(self):
+                print "PMU event: name=%12s, symbol=%24s, comm=%8s, dso=%12s" % (self.name, self.symbol, self.comm, self.dso)
+
+#
+# Basic Intel PEBS (Precise Event-based Sampling) event, whose raw buffer
+# contains the context info when that event happened: the EFLAGS and
+# linear IP info, as well as all the registers.
+#
+class PebsEvent(PerfEvent):
+        pebs_num = 0
+        def __init__(self, name, comm, dso, symbol, raw_buf, ev_type=EVTYPE_PEBS):
+                tmp_buf=raw_buf[0:80]
+                flags, ip, ax, bx, cx, dx, si, di, bp, sp = struct.unpack('QQQQQQQQQQ', tmp_buf)
+                self.flags = flags
+                self.ip    = ip
+                self.ax    = ax
+                self.bx    = bx
+                self.cx    = cx
+                self.dx    = dx
+                self.si    = si
+                self.di    = di
+                self.bp    = bp
+                self.sp    = sp
+
+                PerfEvent.__init__(self, name, comm, dso, symbol, raw_buf, ev_type)
+                PebsEvent.pebs_num += 1
+                del tmp_buf
+
+#
+# Intel Nehalem and Westmere support PEBS plus Load Latency info which lie
+# in the four 64 bit words write after the PEBS data:
+#       Status: records the IA32_PERF_GLOBAL_STATUS register value
+#       DLA:    Data Linear Address (EIP)
+#       DSE:    Data Source Encoding, where the latency happens, hit or miss
+#               in L1/L2/L3 or IO operations
+#       LAT:    the actual latency in cycles
+#
+class PebsNHM(PebsEvent):
+        pebs_nhm_num = 0
+        def __init__(self, name, comm, dso, symbol, raw_buf, ev_type=EVTYPE_PEBS_LL):
+                tmp_buf=raw_buf[144:176]
+                status, dla, dse, lat = struct.unpack('QQQQ', tmp_buf)
+                self.status = status
+                self.dla = dla
+                self.dse = dse
+                self.lat = lat
+
+                PebsEvent.__init__(self, name, comm, dso, symbol, raw_buf, ev_type)
+                PebsNHM.pebs_nhm_num += 1
+                del tmp_buf
diff --git a/tools/perf/scripts/python/bin/event_analyzing_sample-record b/tools/perf/scripts/python/bin/event_analyzing_sample-record
new file mode 100644
index 000000000000..5ce652dabd02
--- /dev/null
+++ b/tools/perf/scripts/python/bin/event_analyzing_sample-record
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+#
+# event_analyzing_sample.py can cover all type of perf samples including
+# the tracepoints, so no special record requirements, just record what
+# you want to analyze.
+#
+perf record $@
diff --git a/tools/perf/scripts/python/bin/event_analyzing_sample-report b/tools/perf/scripts/python/bin/event_analyzing_sample-report
new file mode 100644
index 000000000000..0941fc94e158
--- /dev/null
+++ b/tools/perf/scripts/python/bin/event_analyzing_sample-report
@@ -0,0 +1,3 @@
+#!/bin/bash
+# description: analyze all perf samples
+perf script $@ -s "$PERF_EXEC_PATH"/scripts/python/event_analyzing_sample.py
diff --git a/tools/perf/scripts/python/event_analyzing_sample.py b/tools/perf/scripts/python/event_analyzing_sample.py
new file mode 100644
index 000000000000..163c39fa12d9
--- /dev/null
+++ b/tools/perf/scripts/python/event_analyzing_sample.py
@@ -0,0 +1,189 @@
+# event_analyzing_sample.py: general event handler in python
+#
+# Current perf report is already very powerful with the annotation integrated,
+# and this script is not trying to be as powerful as perf report, but
+# providing end user/developer a flexible way to analyze the events other
+# than trace points.
+#
+# The 2 database related functions in this script just show how to gather
+# the basic information, and users can modify and write their own functions
+# according to their specific requirement.
+#
+# The first function "show_general_events" just does a basic grouping for all
+# generic events with the help of sqlite, and the 2nd one "show_pebs_ll" is
+# for a x86 HW PMU event: PEBS with load latency data.
+#
+
+import os
+import sys
+import math
+import struct
+import sqlite3
+
+sys.path.append(os.environ['PERF_EXEC_PATH'] + \
+        '/scripts/python/Perf-Trace-Util/lib/Perf/Trace')
+
+from perf_trace_context import *
+from EventClass import *
+
+#
+# If the perf.data has a big number of samples, then the insert operation
+# will be very time consuming (about 10+ minutes for 10000 samples) if the
+# .db database is on disk. Move the .db file to RAM based FS to speedup
+# the handling, which will cut the time down to several seconds.
+#
+con = sqlite3.connect("/dev/shm/perf.db")
+con.isolation_level = None
+
+def trace_begin():
+        print "In trace_begin:\n"
+
+        #
+        # Will create several tables at the start, pebs_ll is for PEBS data with
+        # load latency info, while gen_events is for general event.
+        #
+        con.execute("""
+                create table if not exists gen_events (
+                        name text,
+                        symbol text,
+                        comm text,
+                        dso text
+                );""")
+        con.execute("""
+                create table if not exists pebs_ll (
+                        name text,
+                        symbol text,
+                        comm text,
+                        dso text,
+                        flags integer,
+                        ip integer,
+                        status integer,
+                        dse integer,
+                        dla integer,
+                        lat integer
+                );""")
+
+#
+# Create and insert event object to a database so that user could
+# do more analysis with simple database commands.
+#
+def process_event(param_dict):
+        event_attr = param_dict["attr"]
+        sample     = param_dict["sample"]
+        raw_buf    = param_dict["raw_buf"]
+        comm       = param_dict["comm"]
+        name       = param_dict["ev_name"]
+
+        # Symbol and dso info are not always resolved
+        if (param_dict.has_key("dso")):
+                dso = param_dict["dso"]
+        else:
+                dso = "Unknown_dso"
+
+        if (param_dict.has_key("symbol")):
+                symbol = param_dict["symbol"]
+        else:
+                symbol = "Unknown_symbol"
+
+        # Create the event object and insert it to the right table in database
+        event = create_event(name, comm, dso, symbol, raw_buf)
+        insert_db(event)
+
+def insert_db(event):
+        if event.ev_type == EVTYPE_GENERIC:
+                con.execute("insert into gen_events values(?, ?, ?, ?)",
+                                (event.name, event.symbol, event.comm, event.dso))
+        elif event.ev_type == EVTYPE_PEBS_LL:
+                event.ip &= 0x7fffffffffffffff
+                event.dla &= 0x7fffffffffffffff
+                con.execute("insert into pebs_ll values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
+                        (event.name, event.symbol, event.comm, event.dso, event.flags,
+                                event.ip, event.status, event.dse, event.dla, event.lat))
+
+def trace_end():
+        print "In trace_end:\n"
+        # We show the basic info for the 2 type of event classes
+        show_general_events()
+        show_pebs_ll()
+        con.close()
+
+#
+# As the event number may be very big, so we can't use linear way
+# to show the histogram in real number, but use a log2 algorithm.
+#
+
+def num2sym(num):
+        # Each number will have at least one '#'
+        snum = '#' * (int)(math.log(num, 2) + 1)
+        return snum
+
+def show_general_events():
+
+        # Check the total record number in the table
+        count = con.execute("select count(*) from gen_events")
+        for t in count:
+                print "There is %d records in gen_events table" % t[0]
+                if t[0] == 0:
+                        return
+
+        print "Statistics about the general events grouped by thread/symbol/dso: \n"
+
+         # Group by thread
+        commq = con.execute("select comm, count(comm) from gen_events group by comm order by -count(comm)")
+        print "\n%16s %8s %16s\n%s" % ("comm", "number", "histogram", "="*42)
+        for row in commq:
+             print "%16s %8d     %s" % (row[0], row[1], num2sym(row[1]))
+
+        # Group by symbol
+        print "\n%32s %8s %16s\n%s" % ("symbol", "number", "histogram", "="*58)
+        symbolq = con.execute("select symbol, count(symbol) from gen_events group by symbol order by -count(symbol)")
+        for row in symbolq:
+             print "%32s %8d     %s" % (row[0], row[1], num2sym(row[1]))
+
+        # Group by dso
+        print "\n%40s %8s %16s\n%s" % ("dso", "number", "histogram", "="*74)
+        dsoq = con.execute("select dso, count(dso) from gen_events group by dso order by -count(dso)")
+        for row in dsoq:
+             print "%40s %8d     %s" % (row[0], row[1], num2sym(row[1]))
+
+#
+# This function just shows the basic info, and we could do more with the
+# data in the tables, like checking the function parameters when some
+# big latency events happen.
+#
+def show_pebs_ll():
+
+        count = con.execute("select count(*) from pebs_ll")
+        for t in count:
+                print "There is %d records in pebs_ll table" % t[0]
+                if t[0] == 0:
+                        return
+
+        print "Statistics about the PEBS Load Latency events grouped by thread/symbol/dse/latency: \n"
+
+        # Group by thread
+        commq = con.execute("select comm, count(comm) from pebs_ll group by comm order by -count(comm)")
+        print "\n%16s %8s %16s\n%s" % ("comm", "number", "histogram", "="*42)
+        for row in commq:
+             print "%16s %8d     %s" % (row[0], row[1], num2sym(row[1]))
+
+        # Group by symbol
+        print "\n%32s %8s %16s\n%s" % ("symbol", "number", "histogram", "="*58)
+        symbolq = con.execute("select symbol, count(symbol) from pebs_ll group by symbol order by -count(symbol)")
+        for row in symbolq:
+             print "%32s %8d     %s" % (row[0], row[1], num2sym(row[1]))
+
+        # Group by dse
+        dseq = con.execute("select dse, count(dse) from pebs_ll group by dse order by -count(dse)")
+        print "\n%32s %8s %16s\n%s" % ("dse", "number", "histogram", "="*58)
+        for row in dseq:
+             print "%32s %8d     %s" % (row[0], row[1], num2sym(row[1]))
+
+        # Group by latency
+        latq = con.execute("select lat, count(lat) from pebs_ll group by lat order by lat")
+        print "\n%32s %8s %16s\n%s" % ("latency", "number", "histogram", "="*58)
+        for row in latq:
+             print "%32s %8d     %s" % (row[0], row[1], num2sym(row[1]))
+
+def trace_unhandled(event_name, context, event_fields_dict):
+                print ' '.join(['%s=%s'%(k,str(v))for k,v in sorted(event_fields_dict.items())])
diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index 1818a531f1d3..4aeb7d5df939 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -269,7 +269,7 @@ int ui_browser__show(struct ui_browser *browser, const char *title,
         return err ? 0 : -1;
 }
 
-void ui_browser__hide(struct ui_browser *browser __used)
+void ui_browser__hide(struct ui_browser *browser __maybe_unused)
 {
         pthread_mutex_lock(&ui__lock);
         ui_helpline__pop();
@@ -518,7 +518,7 @@ static struct ui_browser__colorset {
 
 
 static int ui_browser__color_config(const char *var, const char *value,
-                                    void *data __used)
+                                    void *data __maybe_unused)
 {
         char *fg = NULL, *bg;
         int i;
@@ -602,7 +602,8 @@ void __ui_browser__vline(struct ui_browser *browser, unsigned int column,
         SLsmg_set_char_set(0);
 }
 
-void ui_browser__write_graph(struct ui_browser *browser __used, int graph)
+void ui_browser__write_graph(struct ui_browser *browser __maybe_unused,
+                             int graph)
 {
         SLsmg_set_char_set(1);
         SLsmg_write_char(graph);
diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index 67a2703e666a..8f8cd2d73b3b 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -54,7 +54,8 @@ static inline struct browser_disasm_line *disasm_line__browser(struct disasm_lin
         return (struct browser_disasm_line *)(dl + 1);
 }
 
-static bool disasm_line__filter(struct ui_browser *browser __used, void *entry)
+static bool disasm_line__filter(struct ui_browser *browser __maybe_unused,
+                                void *entry)
 {
         if (annotate_browser__opts.hide_src_code) {
                 struct disasm_line *dl = list_entry(entry, struct disasm_line, node);
@@ -928,7 +929,8 @@ static int annotate_config__cmp(const void *name, const void *cfgp)
         return strcmp(name, cfg->name);
 }
 
-static int annotate__config(const char *var, const char *value, void *data __used)
+static int annotate__config(const char *var, const char *value,
+                            void *data __maybe_unused)
 {
         struct annotate__config *cfg;
         const char *name;
diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 413bd62eedb1..a21f40bebbac 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -24,9 +24,12 @@ struct hist_browser {
         struct hist_entry   *he_selection;
         struct map_symbol   *selection;
         int                  print_seq;
+        bool                 show_dso;
         bool                 has_symbols;
 };
 
+extern void hist_browser__init_hpp(void);
+
 static int hists__browser_title(struct hists *hists, char *bf, size_t size,
                                 const char *ev_name);
 
@@ -376,12 +379,19 @@ out:
 }
 
 static char *callchain_list__sym_name(struct callchain_list *cl,
-                                      char *bf, size_t bfsize)
+                                      char *bf, size_t bfsize, bool show_dso)
 {
+        int printed;
+
         if (cl->ms.sym)
-                return cl->ms.sym->name;
+                printed = scnprintf(bf, bfsize, "%s", cl->ms.sym->name);
+        else
+                printed = scnprintf(bf, bfsize, "%#" PRIx64, cl->ip);
+
+        if (show_dso)
+                scnprintf(bf + printed, bfsize - printed, " %s",
+                          cl->ms.map ? cl->ms.map->dso->short_name : "unknown");
 
-        snprintf(bf, bfsize, "%#" PRIx64, cl->ip);
         return bf;
 }
 
@@ -417,7 +427,7 @@ static int hist_browser__show_callchain_node_rb_tree(struct hist_browser *browse
                 remaining -= cumul;
 
                 list_for_each_entry(chain, &child->val, list) {
-                        char ipstr[BITS_PER_LONG / 4 + 1], *alloc_str;
+                        char bf[1024], *alloc_str;
                         const char *str;
                         int color;
                         bool was_first = first;
@@ -434,7 +444,8 @@ static int hist_browser__show_callchain_node_rb_tree(struct hist_browser *browse
                         }
 
                         alloc_str = NULL;
-                        str = callchain_list__sym_name(chain, ipstr, sizeof(ipstr));
+                        str = callchain_list__sym_name(chain, bf, sizeof(bf),
+                                                       browser->show_dso);
                         if (was_first) {
                                 double percent = cumul * 100.0 / new_total;
 
@@ -493,7 +504,7 @@ static int hist_browser__show_callchain_node(struct hist_browser *browser,
         char folded_sign = ' ';
 
         list_for_each_entry(chain, &node->val, list) {
-                char ipstr[BITS_PER_LONG / 4 + 1], *s;
+                char bf[1024], *s;
                 int color;
 
                 folded_sign = callchain_list__folded(chain);
@@ -510,7 +521,8 @@ static int hist_browser__show_callchain_node(struct hist_browser *browser,
                         *is_current_entry = true;
                 }
 
-                s = callchain_list__sym_name(chain, ipstr, sizeof(ipstr));
+                s = callchain_list__sym_name(chain, bf, sizeof(bf),
+                                             browser->show_dso);
                 ui_browser__gotorc(&browser->b, row, 0);
                 ui_browser__set_color(&browser->b, color);
                 slsmg_write_nstring(" ", offset);
@@ -553,14 +565,47 @@ static int hist_browser__show_callchain(struct hist_browser *browser,
         return row - first_row;
 }
 
+#define HPP__COLOR_FN(_name, _field)                                    \
+static int hist_browser__hpp_color_ ## _name(struct perf_hpp *hpp,      \
+                                             struct hist_entry *he)     \
+{                                                                       \
+        double percent = 100.0 * he->_field / hpp->total_period;        \
+        *(double *)hpp->ptr = percent;                                  \
+        return scnprintf(hpp->buf, hpp->size, "%6.2f%%", percent);      \
+}
+
+HPP__COLOR_FN(overhead, period)
+HPP__COLOR_FN(overhead_sys, period_sys)
+HPP__COLOR_FN(overhead_us, period_us)
+HPP__COLOR_FN(overhead_guest_sys, period_guest_sys)
+HPP__COLOR_FN(overhead_guest_us, period_guest_us)
+
+#undef HPP__COLOR_FN
+
+void hist_browser__init_hpp(void)
+{
+        perf_hpp__init(false, false);
+
+        perf_hpp__format[PERF_HPP__OVERHEAD].color =
+                                hist_browser__hpp_color_overhead;
+        perf_hpp__format[PERF_HPP__OVERHEAD_SYS].color =
+                                hist_browser__hpp_color_overhead_sys;
+        perf_hpp__format[PERF_HPP__OVERHEAD_US].color =
+                                hist_browser__hpp_color_overhead_us;
+        perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_SYS].color =
+                                hist_browser__hpp_color_overhead_guest_sys;
+        perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_US].color =
+                                hist_browser__hpp_color_overhead_guest_us;
+}
+
 static int hist_browser__show_entry(struct hist_browser *browser,
                                     struct hist_entry *entry,
                                     unsigned short row)
 {
         char s[256];
         double percent;
-        int printed = 0;
-        int width = browser->b.width - 6; /* The percentage */
+        int i, printed = 0;
+        int width = browser->b.width;
         char folded_sign = ' ';
         bool current_entry = ui_browser__is_current_entry(&browser->b, row);
         off_t row_offset = entry->row_offset;
@@ -576,35 +621,50 @@ static int hist_browser__show_entry(struct hist_browser *browser,
         }
 
         if (row_offset == 0) {
-                hist_entry__snprintf(entry, s, sizeof(s), browser->hists);
-                percent = (entry->period * 100.0) / browser->hists->stats.total_period;
+                struct perf_hpp hpp = {
+                        .buf            = s,
+                        .size           = sizeof(s),
+                        .total_period   = browser->hists->stats.total_period,
+                };
 
-                ui_browser__set_percent_color(&browser->b, percent, current_entry);
                 ui_browser__gotorc(&browser->b, row, 0);
-                if (symbol_conf.use_callchain) {
-                        slsmg_printf("%c ", folded_sign);
-                        width -= 2;
-                }
 
-                slsmg_printf(" %5.2f%%", percent);
+                for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
+                        if (!perf_hpp__format[i].cond)
+                                continue;
 
-                /* The scroll bar isn't being used */
-                if (!browser->b.navkeypressed)
-                        width += 1;
+                        if (i) {
+                                slsmg_printf("  ");
+                                width -= 2;
+                        }
 
-                if (!current_entry || !browser->b.navkeypressed)
-                        ui_browser__set_color(&browser->b, HE_COLORSET_NORMAL);
+                        if (perf_hpp__format[i].color) {
+                                hpp.ptr = &percent;
+                                /* It will set percent for us. See HPP__COLOR_FN above. */
+                                width -= perf_hpp__format[i].color(&hpp, entry);
 
-                if (symbol_conf.show_nr_samples) {
-                        slsmg_printf(" %11u", entry->nr_events);
-                        width -= 12;
-                }
+                                ui_browser__set_percent_color(&browser->b, percent, current_entry);
+
+                                if (i == 0 && symbol_conf.use_callchain) {
+                                        slsmg_printf("%c ", folded_sign);
+                                        width -= 2;
+                                }
+
+                                slsmg_printf("%s", s);
 
-                if (symbol_conf.show_total_period) {
-                        slsmg_printf(" %12" PRIu64, entry->period);
-                        width -= 13;
+                                if (!current_entry || !browser->b.navkeypressed)
+                                        ui_browser__set_color(&browser->b, HE_COLORSET_NORMAL);
+                        } else {
+                                width -= perf_hpp__format[i].entry(&hpp, entry);
+                                slsmg_printf("%s", s);
+                        }
                 }
 
+                /* The scroll bar isn't being used */
+                if (!browser->b.navkeypressed)
+                        width += 1;
+
+                hist_entry__sort_snprintf(entry, s, sizeof(s), browser->hists);
                 slsmg_write_nstring(s, width);
                 ++row;
                 ++printed;
@@ -830,7 +890,7 @@ static int hist_browser__fprintf_callchain_node_rb_tree(struct hist_browser *bro
                 remaining -= cumul;
 
                 list_for_each_entry(chain, &child->val, list) {
-                        char ipstr[BITS_PER_LONG / 4 + 1], *alloc_str;
+                        char bf[1024], *alloc_str;
                         const char *str;
                         bool was_first = first;
 
@@ -842,7 +902,8 @@ static int hist_browser__fprintf_callchain_node_rb_tree(struct hist_browser *bro
                         folded_sign = callchain_list__folded(chain);
 
                         alloc_str = NULL;
-                        str = callchain_list__sym_name(chain, ipstr, sizeof(ipstr));
+                        str = callchain_list__sym_name(chain, bf, sizeof(bf),
+                                                       browser->show_dso);
                         if (was_first) {
                                 double percent = cumul * 100.0 / new_total;
 
@@ -880,10 +941,10 @@ static int hist_browser__fprintf_callchain_node(struct hist_browser *browser,
         int printed = 0;
 
         list_for_each_entry(chain, &node->val, list) {
-                char ipstr[BITS_PER_LONG / 4 + 1], *s;
+                char bf[1024], *s;
 
                 folded_sign = callchain_list__folded(chain);
-                s = callchain_list__sym_name(chain, ipstr, sizeof(ipstr));
+                s = callchain_list__sym_name(chain, bf, sizeof(bf), browser->show_dso);
                 printed += fprintf(fp, "%*s%c %s\n", offset, " ", folded_sign, s);
         }
 
@@ -920,7 +981,7 @@ static int hist_browser__fprintf_entry(struct hist_browser *browser,
         if (symbol_conf.use_callchain)
                 folded_sign = hist_entry__folded(he);
 
-        hist_entry__snprintf(he, s, sizeof(s), browser->hists);
+        hist_entry__sort_snprintf(he, s, sizeof(s), browser->hists);
         percent = (he->period * 100.0) / browser->hists->stats.total_period;
 
         if (symbol_conf.use_callchain)
@@ -1133,6 +1194,9 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
                         continue;
                 case 'd':
                         goto zoom_dso;
+                case 'V':
+                        browser->show_dso = !browser->show_dso;
+                        continue;
                 case 't':
                         goto zoom_thread;
                 case '/':
@@ -1164,6 +1228,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
                                         "d             Zoom into current DSO\n"
                                         "t             Zoom into current Thread\n"
                                         "P             Print histograms to perf.hist.N\n"
+                                        "V             Verbose (DSO names in callchains, etc)\n"
                                         "/             Filter symbol by name");
                         continue;
                 case K_ENTER:
diff --git a/tools/perf/ui/gtk/browser.c b/tools/perf/ui/gtk/browser.c
index ec12e0b4ded6..7ff99ec1d95e 100644
--- a/tools/perf/ui/gtk/browser.c
+++ b/tools/perf/ui/gtk/browser.c
@@ -3,6 +3,7 @@
 #include "../evsel.h"
 #include "../sort.h"
 #include "../hist.h"
+#include "../helpline.h"
 #include "gtk.h"
 
 #include <signal.h>
@@ -35,6 +36,57 @@ static void perf_gtk__resize_window(GtkWidget *window)
         gtk_window_resize(GTK_WINDOW(window), width, height);
 }
 
+static const char *perf_gtk__get_percent_color(double percent)
+{
+        if (percent >= MIN_RED)
+                return "<span fgcolor='red'>";
+        if (percent >= MIN_GREEN)
+                return "<span fgcolor='dark green'>";
+        return NULL;
+}
+
+#define HPP__COLOR_FN(_name, _field)                                            \
+static int perf_gtk__hpp_color_ ## _name(struct perf_hpp *hpp,                  \
+                                         struct hist_entry *he)                 \
+{                                                                               \
+        double percent = 100.0 * he->_field / hpp->total_period;                \
+        const char *markup;                                                     \
+        int ret = 0;                                                            \
+                                                                                \
+        markup = perf_gtk__get_percent_color(percent);                          \
+        if (markup)                                                             \
+                ret += scnprintf(hpp->buf, hpp->size, "%s", markup);            \
+        ret += scnprintf(hpp->buf + ret, hpp->size - ret, "%6.2f%%", percent);  \
+        if (markup)                                                             \
+                ret += scnprintf(hpp->buf + ret, hpp->size - ret, "</span>");   \
+                                                                                \
+        return ret;                                                             \
+}
+
+HPP__COLOR_FN(overhead, period)
+HPP__COLOR_FN(overhead_sys, period_sys)
+HPP__COLOR_FN(overhead_us, period_us)
+HPP__COLOR_FN(overhead_guest_sys, period_guest_sys)
+HPP__COLOR_FN(overhead_guest_us, period_guest_us)
+
+#undef HPP__COLOR_FN
+
+void perf_gtk__init_hpp(void)
+{
+        perf_hpp__init(false, false);
+
+        perf_hpp__format[PERF_HPP__OVERHEAD].color =
+                                perf_gtk__hpp_color_overhead;
+        perf_hpp__format[PERF_HPP__OVERHEAD_SYS].color =
+                                perf_gtk__hpp_color_overhead_sys;
+        perf_hpp__format[PERF_HPP__OVERHEAD_US].color =
+                                perf_gtk__hpp_color_overhead_us;
+        perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_SYS].color =
+                                perf_gtk__hpp_color_overhead_guest_sys;
+        perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_US].color =
+                                perf_gtk__hpp_color_overhead_guest_us;
+}
+
 static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists)
 {
         GType col_types[MAX_COLUMNS];
@@ -42,15 +94,25 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists)
         struct sort_entry *se;
         GtkListStore *store;
         struct rb_node *nd;
-        u64 total_period;
         GtkWidget *view;
-        int col_idx;
+        int i, col_idx;
         int nr_cols;
+        char s[512];
+
+        struct perf_hpp hpp = {
+                .buf            = s,
+                .size           = sizeof(s),
+                .total_period   = hists->stats.total_period,
+        };
 
         nr_cols = 0;
 
-        /* The percentage column */
-        col_types[nr_cols++] = G_TYPE_STRING;
+        for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
+                if (!perf_hpp__format[i].cond)
+                        continue;
+
+                col_types[nr_cols++] = G_TYPE_STRING;
+        }
 
         list_for_each_entry(se, &hist_entry__sort_list, list) {
                 if (se->elide)
@@ -67,11 +129,17 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists)
 
         col_idx = 0;
 
-        /* The percentage column */
-        gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(view),
-                                                    -1, "Overhead (%)",
-                                                    renderer, "text",
-                                                    col_idx++, NULL);
+        for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
+                if (!perf_hpp__format[i].cond)
+                        continue;
+
+                perf_hpp__format[i].header(&hpp);
+
+                gtk_tree_view_insert_column_with_attributes(GTK_TREE_VIEW(view),
+                                                            -1, s,
+                                                            renderer, "markup",
+                                                            col_idx++, NULL);
+        }
 
         list_for_each_entry(se, &hist_entry__sort_list, list) {
                 if (se->elide)
@@ -87,13 +155,9 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists)
 
         g_object_unref(GTK_TREE_MODEL(store));
 
-        total_period = hists->stats.total_period;
-
         for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
                 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
                 GtkTreeIter iter;
-                double percent;
-                char s[512];
 
                 if (h->filtered)
                         continue;
@@ -102,11 +166,17 @@ static void perf_gtk__show_hists(GtkWidget *window, struct hists *hists)
 
                 col_idx = 0;
 
-                percent = (h->period * 100.0) / total_period;
+                for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
+                        if (!perf_hpp__format[i].cond)
+                                continue;
 
-                snprintf(s, ARRAY_SIZE(s), "%.2f", percent);
+                        if (perf_hpp__format[i].color)
+                                perf_hpp__format[i].color(&hpp, h);
+                        else
+                                perf_hpp__format[i].entry(&hpp, h);
 
-                gtk_list_store_set(store, &iter, col_idx++, s, -1);
+                        gtk_list_store_set(store, &iter, col_idx++, s, -1);
+                }
 
                 list_for_each_entry(se, &hist_entry__sort_list, list) {
                         if (se->elide)
@@ -166,9 +236,10 @@ static GtkWidget *perf_gtk__setup_statusbar(void)
 }
 
 int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist,
-                                  const char *help __used,
-                                  void (*timer) (void *arg)__used,
-                                  void *arg __used, int delay_secs __used)
+                                  const char *help,
+                                  void (*timer) (void *arg)__maybe_unused,
+                                  void *arg __maybe_unused,
+                                  int delay_secs __maybe_unused)
 {
         struct perf_evsel *pos;
         GtkWidget *vbox;
@@ -233,6 +304,8 @@ int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist,
 
         gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
 
+        ui_helpline__push(help);
+
         gtk_main();
 
         perf_gtk__deactivate_context(&pgctx);
diff --git a/tools/perf/ui/gtk/gtk.h b/tools/perf/ui/gtk/gtk.h
index a4d0f2b4a2dc..687af0bba187 100644
--- a/tools/perf/ui/gtk/gtk.h
+++ b/tools/perf/ui/gtk/gtk.h
@@ -29,6 +29,9 @@ static inline bool perf_gtk__is_active_context(struct perf_gtk_context *ctx)
 struct perf_gtk_context *perf_gtk__activate_context(GtkWidget *window);
 int perf_gtk__deactivate_context(struct perf_gtk_context **ctx);
 
+void perf_gtk__init_helpline(void);
+void perf_gtk__init_hpp(void);
+
 #ifndef HAVE_GTK_INFO_BAR
 static inline GtkWidget *perf_gtk__setup_info_bar(void)
 {
diff --git a/tools/perf/ui/gtk/helpline.c b/tools/perf/ui/gtk/helpline.c
new file mode 100644
index 000000000000..5db4432ff12a
--- /dev/null
+++ b/tools/perf/ui/gtk/helpline.c
@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <string.h>
+
+#include "gtk.h"
+#include "../ui.h"
+#include "../helpline.h"
+#include "../../util/debug.h"
+
+static void gtk_helpline_pop(void)
+{
+        if (!perf_gtk__is_active_context(pgctx))
+                return;
+
+        gtk_statusbar_pop(GTK_STATUSBAR(pgctx->statbar),
+                          pgctx->statbar_ctx_id);
+}
+
+static void gtk_helpline_push(const char *msg)
+{
+        if (!perf_gtk__is_active_context(pgctx))
+                return;
+
+        gtk_statusbar_push(GTK_STATUSBAR(pgctx->statbar),
+                           pgctx->statbar_ctx_id, msg);
+}
+
+static struct ui_helpline gtk_helpline_fns = {
+        .pop    = gtk_helpline_pop,
+        .push   = gtk_helpline_push,
+};
+
+void perf_gtk__init_helpline(void)
+{
+        helpline_fns = &gtk_helpline_fns;
+}
+
+int perf_gtk__show_helpline(const char *fmt, va_list ap)
+{
+        int ret;
+        char *ptr;
+        static int backlog;
+
+        ret = vscnprintf(ui_helpline__current + backlog,
+                         sizeof(ui_helpline__current) - backlog, fmt, ap);
+        backlog += ret;
+
+        /* only first line can be displayed */
+        ptr = strchr(ui_helpline__current, '\n');
+        if (ptr && (ptr - ui_helpline__current) <= backlog) {
+                *ptr = '\0';
+                ui_helpline__puts(ui_helpline__current);
+                backlog = 0;
+        }
+
+        return ret;
+}
diff --git a/tools/perf/ui/gtk/setup.c b/tools/perf/ui/gtk/setup.c
index 92879ce61e2f..3c4c6ef78283 100644
--- a/tools/perf/ui/gtk/setup.c
+++ b/tools/perf/ui/gtk/setup.c
@@ -7,11 +7,15 @@ extern struct perf_error_ops perf_gtk_eops;
 int perf_gtk__init(void)
 {
         perf_error__register(&perf_gtk_eops);
+        perf_gtk__init_helpline();
+        perf_gtk__init_hpp();
         return gtk_init_check(NULL, NULL) ? 0 : -1;
 }
 
-void perf_gtk__exit(bool wait_for_ok __used)
+void perf_gtk__exit(bool wait_for_ok __maybe_unused)
 {
+        if (!perf_gtk__is_active_context(pgctx))
+                return;
         perf_error__unregister(&perf_gtk_eops);
         gtk_main_quit();
 }
diff --git a/tools/perf/ui/gtk/util.c b/tools/perf/ui/gtk/util.c
index 0ead373c0dfb..8aada5b3c04c 100644
--- a/tools/perf/ui/gtk/util.c
+++ b/tools/perf/ui/gtk/util.c
@@ -117,13 +117,8 @@ struct perf_error_ops perf_gtk_eops = {
  *        For now, just add stubs for NO_NEWT=1 build.
  */
 #ifdef NO_NEWT_SUPPORT
-int ui_helpline__show_help(const char *format __used, va_list ap __used)
-{
-        return 0;
-}
-
-void ui_progress__update(u64 curr __used, u64 total __used,
-                         const char *title __used)
+void ui_progress__update(u64 curr __maybe_unused, u64 total __maybe_unused,
+                         const char *title __maybe_unused)
 {
 }
 #endif
diff --git a/tools/perf/ui/helpline.c b/tools/perf/ui/helpline.c
index 2f950c2641c8..a49bcf3c190b 100644
--- a/tools/perf/ui/helpline.c
+++ b/tools/perf/ui/helpline.c
@@ -5,23 +5,32 @@
 #include "../debug.h"
 #include "helpline.h"
 #include "ui.h"
-#include "libslang.h"
 
-void ui_helpline__pop(void)
+char ui_helpline__current[512];
+
+static void nop_helpline__pop(void)
 {
 }
 
-char ui_helpline__current[512];
+static void nop_helpline__push(const char *msg __maybe_unused)
+{
+}
 
-void ui_helpline__push(const char *msg)
+static struct ui_helpline default_helpline_fns = {
+        .pop    = nop_helpline__pop,
+        .push   = nop_helpline__push,
+};
+
+struct ui_helpline *helpline_fns = &default_helpline_fns;
+
+void ui_helpline__pop(void)
 {
-        const size_t sz = sizeof(ui_helpline__current);
+        helpline_fns->pop();
+}
 
-        SLsmg_gotorc(SLtt_Screen_Rows - 1, 0);
-        SLsmg_set_color(0);
-        SLsmg_write_nstring((char *)msg, SLtt_Screen_Cols);
-        SLsmg_refresh();
-        strncpy(ui_helpline__current, msg, sz)[sz - 1] = '\0';
+void ui_helpline__push(const char *msg)
+{
+        helpline_fns->push(msg);
 }
 
 void ui_helpline__vpush(const char *fmt, va_list ap)
@@ -50,30 +59,3 @@ void ui_helpline__puts(const char *msg)
         ui_helpline__pop();
         ui_helpline__push(msg);
 }
-
-void ui_helpline__init(void)
-{
-        ui_helpline__puts(" ");
-}
-
-char ui_helpline__last_msg[1024];
-
-int ui_helpline__show_help(const char *format, va_list ap)
-{
-        int ret;
-        static int backlog;
-
-        pthread_mutex_lock(&ui__lock);
-        ret = vscnprintf(ui_helpline__last_msg + backlog,
-                        sizeof(ui_helpline__last_msg) - backlog, format, ap);
-        backlog += ret;
-
-        if (ui_helpline__last_msg[backlog - 1] == '\n') {
-                ui_helpline__puts(ui_helpline__last_msg);
-                SLsmg_refresh();
-                backlog = 0;
-        }
-        pthread_mutex_unlock(&ui__lock);
-
-        return ret;
-}
diff --git a/tools/perf/ui/helpline.h b/tools/perf/ui/helpline.h
index 7bab6b34e35e..2b667ee454c3 100644
--- a/tools/perf/ui/helpline.h
+++ b/tools/perf/ui/helpline.h
@@ -4,13 +4,44 @@
 #include <stdio.h>
 #include <stdarg.h>
 
+#include "../util/cache.h"
+
+struct ui_helpline {
+        void (*pop)(void);
+        void (*push)(const char *msg);
+};
+
+extern struct ui_helpline *helpline_fns;
+
 void ui_helpline__init(void);
+
 void ui_helpline__pop(void);
 void ui_helpline__push(const char *msg);
 void ui_helpline__vpush(const char *fmt, va_list ap);
 void ui_helpline__fpush(const char *fmt, ...);
 void ui_helpline__puts(const char *msg);
 
-extern char ui_helpline__current[];
+extern char ui_helpline__current[512];
+
+#ifdef NO_NEWT_SUPPORT
+static inline int ui_helpline__show_help(const char *format __maybe_unused,
+                                         va_list ap __maybe_unused)
+{
+        return 0;
+}
+#else
+extern char ui_helpline__last_msg[];
+int ui_helpline__show_help(const char *format, va_list ap);
+#endif /* NO_NEWT_SUPPORT */
+
+#ifdef NO_GTK2_SUPPORT
+static inline int perf_gtk__show_helpline(const char *format __maybe_unused,
+                                          va_list ap __maybe_unused)
+{
+        return 0;
+}
+#else
+int perf_gtk__show_helpline(const char *format, va_list ap);
+#endif /* NO_GTK2_SUPPORT */
 
 #endif /* _PERF_UI_HELPLINE_H_ */
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
new file mode 100644
index 000000000000..e3f8cd46e7d7
--- /dev/null
+++ b/tools/perf/ui/hist.c
@@ -0,0 +1,390 @@
+#include <math.h>
+
+#include "../util/hist.h"
+#include "../util/util.h"
+#include "../util/sort.h"
+
+
+/* hist period print (hpp) functions */
+static int hpp__header_overhead(struct perf_hpp *hpp)
+{
+        const char *fmt = hpp->ptr ? "Baseline" : "Overhead";
+
+        return scnprintf(hpp->buf, hpp->size, fmt);
+}
+
+static int hpp__width_overhead(struct perf_hpp *hpp __maybe_unused)
+{
+        return 8;
+}
+
+static int hpp__color_overhead(struct perf_hpp *hpp, struct hist_entry *he)
+{
+        double percent = 100.0 * he->period / hpp->total_period;
+
+        if (hpp->ptr) {
+                struct hists *old_hists = hpp->ptr;
+                u64 total_period = old_hists->stats.total_period;
+                u64 base_period = he->pair ? he->pair->period : 0;
+
+                if (total_period)
+                        percent = 100.0 * base_period / total_period;
+                else
+                        percent = 0.0;
+        }
+
+        return percent_color_snprintf(hpp->buf, hpp->size, " %6.2f%%", percent);
+}
+
+static int hpp__entry_overhead(struct perf_hpp *hpp, struct hist_entry *he)
+{
+        double percent = 100.0 * he->period / hpp->total_period;
+        const char *fmt = symbol_conf.field_sep ? "%.2f" : " %6.2f%%";
+
+        if (hpp->ptr) {
+                struct hists *old_hists = hpp->ptr;
+                u64 total_period = old_hists->stats.total_period;
+                u64 base_period = he->pair ? he->pair->period : 0;
+
+                if (total_period)
+                        percent = 100.0 * base_period / total_period;
+                else
+                        percent = 0.0;
+        }
+
+        return scnprintf(hpp->buf, hpp->size, fmt, percent);
+}
+
+static int hpp__header_overhead_sys(struct perf_hpp *hpp)
+{
+        const char *fmt = symbol_conf.field_sep ? "%s" : "%7s";
+
+        return scnprintf(hpp->buf, hpp->size, fmt, "sys");
+}
+
+static int hpp__width_overhead_sys(struct perf_hpp *hpp __maybe_unused)
+{
+        return 7;
+}
+
+static int hpp__color_overhead_sys(struct perf_hpp *hpp, struct hist_entry *he)
+{
+        double percent = 100.0 * he->period_sys / hpp->total_period;
+        return percent_color_snprintf(hpp->buf, hpp->size, "%6.2f%%", percent);
+}
+
+static int hpp__entry_overhead_sys(struct perf_hpp *hpp, struct hist_entry *he)
+{
+        double percent = 100.0 * he->period_sys / hpp->total_period;
+        const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
+
+        return scnprintf(hpp->buf, hpp->size, fmt, percent);
+}
+
+static int hpp__header_overhead_us(struct perf_hpp *hpp)
+{
+        const char *fmt = symbol_conf.field_sep ? "%s" : "%7s";
+
+        return scnprintf(hpp->buf, hpp->size, fmt, "user");
+}
+
+static int hpp__width_overhead_us(struct perf_hpp *hpp __maybe_unused)
+{
+        return 7;
+}
+
+static int hpp__color_overhead_us(struct perf_hpp *hpp, struct hist_entry *he)
+{
+        double percent = 100.0 * he->period_us / hpp->total_period;
+        return percent_color_snprintf(hpp->buf, hpp->size, "%6.2f%%", percent);
+}
+
+static int hpp__entry_overhead_us(struct perf_hpp *hpp, struct hist_entry *he)
+{
+        double percent = 100.0 * he->period_us / hpp->total_period;
+        const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
+
+        return scnprintf(hpp->buf, hpp->size, fmt, percent);
+}
+
+static int hpp__header_overhead_guest_sys(struct perf_hpp *hpp)
+{
+        return scnprintf(hpp->buf, hpp->size, "guest sys");
+}
+
+static int hpp__width_overhead_guest_sys(struct perf_hpp *hpp __maybe_unused)
+{
+        return 9;
+}
+
+static int hpp__color_overhead_guest_sys(struct perf_hpp *hpp,
+                                         struct hist_entry *he)
+{
+        double percent = 100.0 * he->period_guest_sys / hpp->total_period;
+        return percent_color_snprintf(hpp->buf, hpp->size, " %6.2f%% ", percent);
+}
+
+static int hpp__entry_overhead_guest_sys(struct perf_hpp *hpp,
+                                         struct hist_entry *he)
+{
+        double percent = 100.0 * he->period_guest_sys / hpp->total_period;
+        const char *fmt = symbol_conf.field_sep ? "%.2f" : " %6.2f%% ";
+
+        return scnprintf(hpp->buf, hpp->size, fmt, percent);
+}
+
+static int hpp__header_overhead_guest_us(struct perf_hpp *hpp)
+{
+        return scnprintf(hpp->buf, hpp->size, "guest usr");
+}
+
+static int hpp__width_overhead_guest_us(struct perf_hpp *hpp __maybe_unused)
+{
+        return 9;
+}
+
+static int hpp__color_overhead_guest_us(struct perf_hpp *hpp,
+                                        struct hist_entry *he)
+{
+        double percent = 100.0 * he->period_guest_us / hpp->total_period;
+        return percent_color_snprintf(hpp->buf, hpp->size, " %6.2f%% ", percent);
+}
+
+static int hpp__entry_overhead_guest_us(struct perf_hpp *hpp,
+                                        struct hist_entry *he)
+{
+        double percent = 100.0 * he->period_guest_us / hpp->total_period;
+        const char *fmt = symbol_conf.field_sep ? "%.2f" : " %6.2f%% ";
+
+        return scnprintf(hpp->buf, hpp->size, fmt, percent);
+}
+
+static int hpp__header_samples(struct perf_hpp *hpp)
+{
+        const char *fmt = symbol_conf.field_sep ? "%s" : "%11s";
+
+        return scnprintf(hpp->buf, hpp->size, fmt, "Samples");
+}
+
+static int hpp__width_samples(struct perf_hpp *hpp __maybe_unused)
+{
+        return 11;
+}
+
+static int hpp__entry_samples(struct perf_hpp *hpp, struct hist_entry *he)
+{
+        const char *fmt = symbol_conf.field_sep ? "%" PRIu64 : "%11" PRIu64;
+
+        return scnprintf(hpp->buf, hpp->size, fmt, he->nr_events);
+}
+
+static int hpp__header_period(struct perf_hpp *hpp)
+{
+        const char *fmt = symbol_conf.field_sep ? "%s" : "%12s";
+
+        return scnprintf(hpp->buf, hpp->size, fmt, "Period");
+}
+
+static int hpp__width_period(struct perf_hpp *hpp __maybe_unused)
+{
+        return 12;
+}
+
+static int hpp__entry_period(struct perf_hpp *hpp, struct hist_entry *he)
+{
+        const char *fmt = symbol_conf.field_sep ? "%" PRIu64 : "%12" PRIu64;
+
+        return scnprintf(hpp->buf, hpp->size, fmt, he->period);
+}
+
+static int hpp__header_delta(struct perf_hpp *hpp)
+{
+        const char *fmt = symbol_conf.field_sep ? "%s" : "%7s";
+
+        return scnprintf(hpp->buf, hpp->size, fmt, "Delta");
+}
+
+static int hpp__width_delta(struct perf_hpp *hpp __maybe_unused)
+{
+        return 7;
+}
+
+static int hpp__entry_delta(struct perf_hpp *hpp, struct hist_entry *he)
+{
+        struct hists *pair_hists = hpp->ptr;
+        u64 old_total, new_total;
+        double old_percent = 0, new_percent = 0;
+        double diff;
+        const char *fmt = symbol_conf.field_sep ? "%s" : "%7.7s";
+        char buf[32] = " ";
+
+        old_total = pair_hists->stats.total_period;
+        if (old_total > 0 && he->pair)
+                old_percent = 100.0 * he->pair->period / old_total;
+
+        new_total = hpp->total_period;
+        if (new_total > 0)
+                new_percent = 100.0 * he->period / new_total;
+
+        diff = new_percent - old_percent;
+        if (fabs(diff) >= 0.01)
+                scnprintf(buf, sizeof(buf), "%+4.2F%%", diff);
+
+        return scnprintf(hpp->buf, hpp->size, fmt, buf);
+}
+
+static int hpp__header_displ(struct perf_hpp *hpp)
+{
+        return scnprintf(hpp->buf, hpp->size, "Displ.");
+}
+
+static int hpp__width_displ(struct perf_hpp *hpp __maybe_unused)
+{
+        return 6;
+}
+
+static int hpp__entry_displ(struct perf_hpp *hpp,
+                            struct hist_entry *he __maybe_unused)
+{
+        const char *fmt = symbol_conf.field_sep ? "%s" : "%6.6s";
+        char buf[32] = " ";
+
+        if (hpp->displacement)
+                scnprintf(buf, sizeof(buf), "%+4ld", hpp->displacement);
+
+        return scnprintf(hpp->buf, hpp->size, fmt, buf);
+}
+
+#define HPP__COLOR_PRINT_FNS(_name)             \
+        .header = hpp__header_ ## _name,                \
+        .width  = hpp__width_ ## _name,         \
+        .color  = hpp__color_ ## _name,         \
+        .entry  = hpp__entry_ ## _name
+
+#define HPP__PRINT_FNS(_name)                   \
+        .header = hpp__header_ ## _name,                \
+        .width  = hpp__width_ ## _name,         \
+        .entry  = hpp__entry_ ## _name
+
+struct perf_hpp_fmt perf_hpp__format[] = {
+        { .cond = true,  HPP__COLOR_PRINT_FNS(overhead) },
+        { .cond = false, HPP__COLOR_PRINT_FNS(overhead_sys) },
+        { .cond = false, HPP__COLOR_PRINT_FNS(overhead_us) },
+        { .cond = false, HPP__COLOR_PRINT_FNS(overhead_guest_sys) },
+        { .cond = false, HPP__COLOR_PRINT_FNS(overhead_guest_us) },
+        { .cond = false, HPP__PRINT_FNS(samples) },
+        { .cond = false, HPP__PRINT_FNS(period) },
+        { .cond = false, HPP__PRINT_FNS(delta) },
+        { .cond = false, HPP__PRINT_FNS(displ) }
+};
+
+#undef HPP__COLOR_PRINT_FNS
+#undef HPP__PRINT_FNS
+
+void perf_hpp__init(bool need_pair, bool show_displacement)
+{
+        if (symbol_conf.show_cpu_utilization) {
+                perf_hpp__format[PERF_HPP__OVERHEAD_SYS].cond = true;
+                perf_hpp__format[PERF_HPP__OVERHEAD_US].cond = true;
+
+                if (perf_guest) {
+                        perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_SYS].cond = true;
+                        perf_hpp__format[PERF_HPP__OVERHEAD_GUEST_US].cond = true;
+                }
+        }
+
+        if (symbol_conf.show_nr_samples)
+                perf_hpp__format[PERF_HPP__SAMPLES].cond = true;
+
+        if (symbol_conf.show_total_period)
+                perf_hpp__format[PERF_HPP__PERIOD].cond = true;
+
+        if (need_pair) {
+                perf_hpp__format[PERF_HPP__DELTA].cond = true;
+
+                if (show_displacement)
+                        perf_hpp__format[PERF_HPP__DISPL].cond = true;
+        }
+}
+
+static inline void advance_hpp(struct perf_hpp *hpp, int inc)
+{
+        hpp->buf  += inc;
+        hpp->size -= inc;
+}
+
+int hist_entry__period_snprintf(struct perf_hpp *hpp, struct hist_entry *he,
+                                bool color)
+{
+        const char *sep = symbol_conf.field_sep;
+        char *start = hpp->buf;
+        int i, ret;
+
+        if (symbol_conf.exclude_other && !he->parent)
+                return 0;
+
+        for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
+                if (!perf_hpp__format[i].cond)
+                        continue;
+
+                if (!sep || i > 0) {
+                        ret = scnprintf(hpp->buf, hpp->size, "%s", sep ?: "  ");
+                        advance_hpp(hpp, ret);
+                }
+
+                if (color && perf_hpp__format[i].color)
+                        ret = perf_hpp__format[i].color(hpp, he);
+                else
+                        ret = perf_hpp__format[i].entry(hpp, he);
+
+                advance_hpp(hpp, ret);
+        }
+
+        return hpp->buf - start;
+}
+
+int hist_entry__sort_snprintf(struct hist_entry *he, char *s, size_t size,
+                              struct hists *hists)
+{
+        const char *sep = symbol_conf.field_sep;
+        struct sort_entry *se;
+        int ret = 0;
+
+        list_for_each_entry(se, &hist_entry__sort_list, list) {
+                if (se->elide)
+                        continue;
+
+                ret += scnprintf(s + ret, size - ret, "%s", sep ?: "  ");
+                ret += se->se_snprintf(he, s + ret, size - ret,
+                                       hists__col_len(hists, se->se_width_idx));
+        }
+
+        return ret;
+}
+
+/*
+ * See hists__fprintf to match the column widths
+ */
+unsigned int hists__sort_list_width(struct hists *hists)
+{
+        struct sort_entry *se;
+        int i, ret = 0;
+
+        for (i = 0; i < PERF_HPP__MAX_INDEX; i++) {
+                if (!perf_hpp__format[i].cond)
+                        continue;
+                if (i)
+                        ret += 2;
+
+                ret += perf_hpp__format[i].width(NULL);
+        }
+
+        list_for_each_entry(se, &hist_entry__sort_list, list)
+                if (!se->elide)
+                        ret += 2 + hists__col_len(hists, se->se_width_idx);
+
+        if (verbose) /* Addr + origin */
+                ret += 3 + BITS_PER_LONG / 4;
+
+        return ret;
+}
diff --git a/tools/perf/ui/setup.c b/tools/perf/ui/setup.c
index 791fb15ce350..bd7d460f844c 100644
--- a/tools/perf/ui/setup.c
+++ b/tools/perf/ui/setup.c
@@ -1,6 +1,10 @@
-#include "../cache.h"
-#include "../debug.h"
+#include <pthread.h>
 
+#include "../util/cache.h"
+#include "../util/debug.h"
+#include "../util/hist.h"
+
+pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER;
 
 void setup_browser(bool fallback_to_pager)
 {
@@ -25,6 +29,8 @@ void setup_browser(bool fallback_to_pager)
                 use_browser = 0;
                 if (fallback_to_pager)
                         setup_pager();
+
+                perf_hpp__init(false, false);
                 break;
         }
 }
diff --git a/tools/perf/ui/stdio/hist.c b/tools/perf/ui/stdio/hist.c
new file mode 100644
index 000000000000..882461a42830
--- /dev/null
+++ b/tools/perf/ui/stdio/hist.c
@@ -0,0 +1,498 @@
+#include <stdio.h>
+
+#include "../../util/util.h"
+#include "../../util/hist.h"
+#include "../../util/sort.h"
+
+
+static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
+{
+        int i;
+        int ret = fprintf(fp, "            ");
+
+        for (i = 0; i < left_margin; i++)
+                ret += fprintf(fp, " ");
+
+        return ret;
+}
+
+static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask,
+                                          int left_margin)
+{
+        int i;
+        size_t ret = callchain__fprintf_left_margin(fp, left_margin);
+
+        for (i = 0; i < depth; i++)
+                if (depth_mask & (1 << i))
+                        ret += fprintf(fp, "|          ");
+                else
+                        ret += fprintf(fp, "           ");
+
+        ret += fprintf(fp, "\n");
+
+        return ret;
+}
+
+static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_list *chain,
+                                     int depth, int depth_mask, int period,
+                                     u64 total_samples, u64 hits,
+                                     int left_margin)
+{
+        int i;
+        size_t ret = 0;
+
+        ret += callchain__fprintf_left_margin(fp, left_margin);
+        for (i = 0; i < depth; i++) {
+                if (depth_mask & (1 << i))
+                        ret += fprintf(fp, "|");
+                else
+                        ret += fprintf(fp, " ");
+                if (!period && i == depth - 1) {
+                        double percent;
+
+                        percent = hits * 100.0 / total_samples;
+                        ret += percent_color_fprintf(fp, "--%2.2f%%-- ", percent);
+                } else
+                        ret += fprintf(fp, "%s", "          ");
+        }
+        if (chain->ms.sym)
+                ret += fprintf(fp, "%s\n", chain->ms.sym->name);
+        else
+                ret += fprintf(fp, "0x%0" PRIx64 "\n", chain->ip);
+
+        return ret;
+}
+
+static struct symbol *rem_sq_bracket;
+static struct callchain_list rem_hits;
+
+static void init_rem_hits(void)
+{
+        rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
+        if (!rem_sq_bracket) {
+                fprintf(stderr, "Not enough memory to display remaining hits\n");
+                return;
+        }
+
+        strcpy(rem_sq_bracket->name, "[...]");
+        rem_hits.ms.sym = rem_sq_bracket;
+}
+
+static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
+                                         u64 total_samples, int depth,
+                                         int depth_mask, int left_margin)
+{
+        struct rb_node *node, *next;
+        struct callchain_node *child;
+        struct callchain_list *chain;
+        int new_depth_mask = depth_mask;
+        u64 remaining;
+        size_t ret = 0;
+        int i;
+        uint entries_printed = 0;
+
+        remaining = total_samples;
+
+        node = rb_first(root);
+        while (node) {
+                u64 new_total;
+                u64 cumul;
+
+                child = rb_entry(node, struct callchain_node, rb_node);
+                cumul = callchain_cumul_hits(child);
+                remaining -= cumul;
+
+                /*
+                 * The depth mask manages the output of pipes that show
+                 * the depth. We don't want to keep the pipes of the current
+                 * level for the last child of this depth.
+                 * Except if we have remaining filtered hits. They will
+                 * supersede the last child
+                 */
+                next = rb_next(node);
+                if (!next && (callchain_param.mode != CHAIN_GRAPH_REL || !remaining))
+                        new_depth_mask &= ~(1 << (depth - 1));
+
+                /*
+                 * But we keep the older depth mask for the line separator
+                 * to keep the level link until we reach the last child
+                 */
+                ret += ipchain__fprintf_graph_line(fp, depth, depth_mask,
+                                                   left_margin);
+                i = 0;
+                list_for_each_entry(chain, &child->val, list) {
+                        ret += ipchain__fprintf_graph(fp, chain, depth,
+                                                      new_depth_mask, i++,
+                                                      total_samples,
+                                                      cumul,
+                                                      left_margin);
+                }
+
+                if (callchain_param.mode == CHAIN_GRAPH_REL)
+                        new_total = child->children_hit;
+                else
+                        new_total = total_samples;
+
+                ret += __callchain__fprintf_graph(fp, &child->rb_root, new_total,
+                                                  depth + 1,
+                                                  new_depth_mask | (1 << depth),
+                                                  left_margin);
+                node = next;
+                if (++entries_printed == callchain_param.print_limit)
+                        break;
+        }
+
+        if (callchain_param.mode == CHAIN_GRAPH_REL &&
+                remaining && remaining != total_samples) {
+
+                if (!rem_sq_bracket)
+                        return ret;
+
+                new_depth_mask &= ~(1 << (depth - 1));
+                ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
+                                              new_depth_mask, 0, total_samples,
+                                              remaining, left_margin);
+        }
+
+        return ret;
+}
+
+static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
+                                       u64 total_samples, int left_margin)
+{
+        struct callchain_node *cnode;
+        struct callchain_list *chain;
+        u32 entries_printed = 0;
+        bool printed = false;
+        struct rb_node *node;
+        int i = 0;
+        int ret = 0;
+
+        /*
+         * If have one single callchain root, don't bother printing
+         * its percentage (100 % in fractal mode and the same percentage
+         * than the hist in graph mode). This also avoid one level of column.
+         */
+        node = rb_first(root);
+        if (node && !rb_next(node)) {
+                cnode = rb_entry(node, struct callchain_node, rb_node);
+                list_for_each_entry(chain, &cnode->val, list) {
+                        /*
+                         * If we sort by symbol, the first entry is the same than
+                         * the symbol. No need to print it otherwise it appears as
+                         * displayed twice.
+                         */
+                        if (!i++ && sort__first_dimension == SORT_SYM)
+                                continue;
+                        if (!printed) {
+                                ret += callchain__fprintf_left_margin(fp, left_margin);
+                                ret += fprintf(fp, "|\n");
+                                ret += callchain__fprintf_left_margin(fp, left_margin);
+                                ret += fprintf(fp, "---");
+                                left_margin += 3;
+                                printed = true;
+                        } else
+                                ret += callchain__fprintf_left_margin(fp, left_margin);
+
+                        if (chain->ms.sym)
+                                ret += fprintf(fp, " %s\n", chain->ms.sym->name);
+                        else
+                                ret += fprintf(fp, " %p\n", (void *)(long)chain->ip);
+
+                        if (++entries_printed == callchain_param.print_limit)
+                                break;
+                }
+                root = &cnode->rb_root;
+        }
+
+        ret += __callchain__fprintf_graph(fp, root, total_samples,
+                                          1, 1, left_margin);
+        ret += fprintf(fp, "\n");
+
+        return ret;
+}
+
+static size_t __callchain__fprintf_flat(FILE *fp,
+                                        struct callchain_node *self,
+                                        u64 total_samples)
+{
+        struct callchain_list *chain;
+        size_t ret = 0;
+
+        if (!self)
+                return 0;
+
+        ret += __callchain__fprintf_flat(fp, self->parent, total_samples);
+
+
+        list_for_each_entry(chain, &self->val, list) {
+                if (chain->ip >= PERF_CONTEXT_MAX)
+                        continue;
+                if (chain->ms.sym)
+                        ret += fprintf(fp, "                %s\n", chain->ms.sym->name);
+                else
+                        ret += fprintf(fp, "                %p\n",
+                                        (void *)(long)chain->ip);
+        }
+
+        return ret;
+}
+
+static size_t callchain__fprintf_flat(FILE *fp, struct rb_root *self,
+                                      u64 total_samples)
+{
+        size_t ret = 0;
+        u32 entries_printed = 0;
+        struct rb_node *rb_node;
+        struct callchain_node *chain;
+
+        rb_node = rb_first(self);
+        while (rb_node) {
+                double percent;
+
+                chain = rb_entry(rb_node, struct callchain_node, rb_node);
+                percent = chain->hit * 100.0 / total_samples;
+
+                ret = percent_color_fprintf(fp, "           %6.2f%%\n", percent);
+                ret += __callchain__fprintf_flat(fp, chain, total_samples);
+                ret += fprintf(fp, "\n");
+                if (++entries_printed == callchain_param.print_limit)
+                        break;
+
+                rb_node = rb_next(rb_node);
+        }
+
+        return ret;
+}
+
+static size_t hist_entry_callchain__fprintf(struct hist_entry *he,
+                                            u64 total_samples, int left_margin,
+                                            FILE *fp)
+{
+        switch (callchain_param.mode) {
+        case CHAIN_GRAPH_REL:
+                return callchain__fprintf_graph(fp, &he->sorted_chain, he->period,
+                                                left_margin);
+                break;
+        case CHAIN_GRAPH_ABS:
+                return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
+                                                left_margin);
+                break;
+        case CHAIN_FLAT:
+                return callchain__fprintf_flat(fp, &he->sorted_chain, total_samples);
+                break;
+        case CHAIN_NONE:
+                break;
+        default:
+                pr_err("Bad callchain mode\n");
+        }
+
+        return 0;
+}
+
+static size_t hist_entry__callchain_fprintf(struct hist_entry *he,
+                                            struct hists *hists,
+                                            u64 total_period, FILE *fp)
+{
+        int left_margin = 0;
+
+        if (sort__first_dimension == SORT_COMM) {
+                struct sort_entry *se = list_first_entry(&hist_entry__sort_list,
+                                                         typeof(*se), list);
+                left_margin = hists__col_len(hists, se->se_width_idx);
+                left_margin -= thread__comm_len(he->thread);
+        }
+
+        return hist_entry_callchain__fprintf(he, total_period, left_margin, fp);
+}
+
+static int hist_entry__fprintf(struct hist_entry *he, size_t size,
+                               struct hists *hists, struct hists *pair_hists,
+                               long displacement, u64 total_period, FILE *fp)
+{
+        char bf[512];
+        int ret;
+        struct perf_hpp hpp = {
+                .buf            = bf,
+                .size           = size,
+                .total_period   = total_period,
+                .displacement   = displacement,
+                .ptr            = pair_hists,
+        };
+        bool color = !symbol_conf.field_sep;
+
+        if (size == 0 || size > sizeof(bf))
+                size = hpp.size = sizeof(bf);
+
+        ret = hist_entry__period_snprintf(&hpp, he, color);
+        hist_entry__sort_snprintf(he, bf + ret, size - ret, hists);
+
+        ret = fprintf(fp, "%s\n", bf);
+
+        if (symbol_conf.use_callchain)
+                ret += hist_entry__callchain_fprintf(he, hists,
+                                                     total_period, fp);
+
+        return ret;
+}
+
+size_t hists__fprintf(struct hists *hists, struct hists *pair,
+                      bool show_displacement, bool show_header, int max_rows,
+                      int max_cols, FILE *fp)
+{
+        struct sort_entry *se;
+        struct rb_node *nd;
+        size_t ret = 0;
+        u64 total_period;
+        unsigned long position = 1;
+        long displacement = 0;
+        unsigned int width;
+        const char *sep = symbol_conf.field_sep;
+        const char *col_width = symbol_conf.col_width_list_str;
+        int idx, nr_rows = 0;
+        char bf[64];
+        struct perf_hpp dummy_hpp = {
+                .buf    = bf,
+                .size   = sizeof(bf),
+                .ptr    = pair,
+        };
+
+        init_rem_hits();
+
+        if (!show_header)
+                goto print_entries;
+
+        fprintf(fp, "# ");
+        for (idx = 0; idx < PERF_HPP__MAX_INDEX; idx++) {
+                if (!perf_hpp__format[idx].cond)
+                        continue;
+
+                if (idx)
+                        fprintf(fp, "%s", sep ?: "  ");
+
+                perf_hpp__format[idx].header(&dummy_hpp);
+                fprintf(fp, "%s", bf);
+        }
+
+        list_for_each_entry(se, &hist_entry__sort_list, list) {
+                if (se->elide)
+                        continue;
+                if (sep) {
+                        fprintf(fp, "%c%s", *sep, se->se_header);
+                        continue;
+                }
+                width = strlen(se->se_header);
+                if (symbol_conf.col_width_list_str) {
+                        if (col_width) {
+                                hists__set_col_len(hists, se->se_width_idx,
+                                                   atoi(col_width));
+                                col_width = strchr(col_width, ',');
+                                if (col_width)
+                                        ++col_width;
+                        }
+                }
+                if (!hists__new_col_len(hists, se->se_width_idx, width))
+                        width = hists__col_len(hists, se->se_width_idx);
+                fprintf(fp, "  %*s", width, se->se_header);
+        }
+
+        fprintf(fp, "\n");
+        if (max_rows && ++nr_rows >= max_rows)
+                goto out;
+
+        if (sep)
+                goto print_entries;
+
+        fprintf(fp, "# ");
+        for (idx = 0; idx < PERF_HPP__MAX_INDEX; idx++) {
+                unsigned int i;
+
+                if (!perf_hpp__format[idx].cond)
+                        continue;
+
+                if (idx)
+                        fprintf(fp, "%s", sep ?: "  ");
+
+                width = perf_hpp__format[idx].width(&dummy_hpp);
+                for (i = 0; i < width; i++)
+                        fprintf(fp, ".");
+        }
+
+        list_for_each_entry(se, &hist_entry__sort_list, list) {
+                unsigned int i;
+
+                if (se->elide)
+                        continue;
+
+                fprintf(fp, "  ");
+                width = hists__col_len(hists, se->se_width_idx);
+                if (width == 0)
+                        width = strlen(se->se_header);
+                for (i = 0; i < width; i++)
+                        fprintf(fp, ".");
+        }
+
+        fprintf(fp, "\n");
+        if (max_rows && ++nr_rows >= max_rows)
+                goto out;
+
+        fprintf(fp, "#\n");
+        if (max_rows && ++nr_rows >= max_rows)
+                goto out;
+
+print_entries:
+        total_period = hists->stats.total_period;
+
+        for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
+                struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
+
+                if (h->filtered)
+                        continue;
+
+                if (show_displacement) {
+                        if (h->pair != NULL)
+                                displacement = ((long)h->pair->position -
+                                                (long)position);
+                        else
+                                displacement = 0;
+                        ++position;
+                }
+                ret += hist_entry__fprintf(h, max_cols, hists, pair, displacement,
+                                           total_period, fp);
+
+                if (max_rows && ++nr_rows >= max_rows)
+                        goto out;
+
+                if (h->ms.map == NULL && verbose > 1) {
+                        __map_groups__fprintf_maps(&h->thread->mg,
+                                                   MAP__FUNCTION, verbose, fp);
+                        fprintf(fp, "%.10s end\n", graph_dotted_line);
+                }
+        }
+out:
+        free(rem_sq_bracket);
+
+        return ret;
+}
+
+size_t hists__fprintf_nr_events(struct hists *hists, FILE *fp)
+{
+        int i;
+        size_t ret = 0;
+
+        for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
+                const char *name;
+
+                if (hists->stats.nr_events[i] == 0)
+                        continue;
+
+                name = perf_event__name(i);
+                if (!strcmp(name, "UNKNOWN"))
+                        continue;
+
+                ret += fprintf(fp, "%16s events: %10d\n", name,
+                               hists->stats.nr_events[i]);
+        }
+
+        return ret;
+}
diff --git a/tools/perf/ui/tui/helpline.c b/tools/perf/ui/tui/helpline.c
new file mode 100644
index 000000000000..2884d2f41e33
--- /dev/null
+++ b/tools/perf/ui/tui/helpline.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+
+#include "../../util/debug.h"
+#include "../helpline.h"
+#include "../ui.h"
+#include "../libslang.h"
+
+static void tui_helpline__pop(void)
+{
+}
+
+static void tui_helpline__push(const char *msg)
+{
+        const size_t sz = sizeof(ui_helpline__current);
+
+        SLsmg_gotorc(SLtt_Screen_Rows - 1, 0);
+        SLsmg_set_color(0);
+        SLsmg_write_nstring((char *)msg, SLtt_Screen_Cols);
+        SLsmg_refresh();
+        strncpy(ui_helpline__current, msg, sz)[sz - 1] = '\0';
+}
+
+struct ui_helpline tui_helpline_fns = {
+        .pop    = tui_helpline__pop,
+        .push   = tui_helpline__push,
+};
+
+void ui_helpline__init(void)
+{
+        helpline_fns = &tui_helpline_fns;
+        ui_helpline__puts(" ");
+}
+
+char ui_helpline__last_msg[1024];
+
+int ui_helpline__show_help(const char *format, va_list ap)
+{
+        int ret;
+        static int backlog;
+
+        pthread_mutex_lock(&ui__lock);
+        ret = vscnprintf(ui_helpline__last_msg + backlog,
+                        sizeof(ui_helpline__last_msg) - backlog, format, ap);
+        backlog += ret;
+
+        if (ui_helpline__last_msg[backlog - 1] == '\n') {
+                ui_helpline__puts(ui_helpline__last_msg);
+                SLsmg_refresh();
+                backlog = 0;
+        }
+        pthread_mutex_unlock(&ui__lock);
+
+        return ret;
+}
diff --git a/tools/perf/ui/tui/setup.c b/tools/perf/ui/tui/setup.c
index e813c1d17346..60debb81537a 100644
--- a/tools/perf/ui/tui/setup.c
+++ b/tools/perf/ui/tui/setup.c
@@ -11,12 +11,12 @@
 #include "../libslang.h"
 #include "../keysyms.h"
 
-pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER;
-
 static volatile int ui__need_resize;
 
 extern struct perf_error_ops perf_tui_eops;
 
+extern void hist_browser__init_hpp(void);
+
 void ui__refresh_dimensions(bool force)
 {
         if (force || ui__need_resize) {
@@ -28,7 +28,7 @@ void ui__refresh_dimensions(bool force)
         }
 }
 
-static void ui__sigwinch(int sig __used)
+static void ui__sigwinch(int sig __maybe_unused)
 {
         ui__need_resize = 1;
 }
@@ -88,7 +88,7 @@ int ui__getch(int delay_secs)
         return SLkp_getkey();
 }
 
-static void newt_suspend(void *d __used)
+static void newt_suspend(void *d __maybe_unused)
 {
         newtSuspend();
         raise(SIGTSTP);
@@ -126,6 +126,8 @@ int ui__init(void)
         signal(SIGTERM, ui__signal);
 
         perf_error__register(&perf_tui_eops);
+
+        hist_browser__init_hpp();
 out:
         return err;
 }
diff --git a/tools/perf/util/alias.c b/tools/perf/util/alias.c
index b8144e80bb1e..e6d134773d0a 100644
--- a/tools/perf/util/alias.c
+++ b/tools/perf/util/alias.c
@@ -3,7 +3,8 @@
 static const char *alias_key;
 static char *alias_val;
 
-static int alias_lookup_cb(const char *k, const char *v, void *cb __used)
+static int alias_lookup_cb(const char *k, const char *v,
+                           void *cb __maybe_unused)
 {
         if (!prefixcmp(k, "alias.") && !strcmp(k+6, alias_key)) {
                 if (!v)
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 3a282c0057d2..f0a910371377 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -17,6 +17,7 @@
 #include <pthread.h>
 
 const char      *disassembler_style;
+const char      *objdump_path;
 
 static struct ins *ins__find(const char *name);
 static int disasm_line__parse(char *line, char **namep, char **rawp);
@@ -312,8 +313,8 @@ static struct ins_ops dec_ops = {
         .scnprintf = dec__scnprintf,
 };
 
-static int nop__scnprintf(struct ins *ins __used, char *bf, size_t size,
-                          struct ins_operands *ops __used)
+static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
+                          struct ins_operands *ops __maybe_unused)
 {
         return scnprintf(bf, size, "%-6.6s", "nop");
 }
@@ -415,7 +416,7 @@ static struct ins *ins__find(const char *name)
         return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__cmp);
 }
 
-int symbol__annotate_init(struct map *map __used, struct symbol *sym)
+int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym)
 {
         struct annotation *notes = symbol__annotation(sym);
         pthread_mutex_init(&notes->lock, NULL);
@@ -820,9 +821,10 @@ fallback:
                  dso, dso->long_name, sym, sym->name);
 
         snprintf(command, sizeof(command),
-                 "objdump %s%s --start-address=0x%016" PRIx64
+                 "%s %s%s --start-address=0x%016" PRIx64
                  " --stop-address=0x%016" PRIx64
                  " -d %s %s -C %s|grep -v %s|expand",
+                 objdump_path ? objdump_path : "objdump",
                  disassembler_style ? "-M " : "",
                  disassembler_style ? disassembler_style : "",
                  map__rip_2objdump(map, sym->start),
@@ -982,7 +984,8 @@ int symbol__annotate_printf(struct symbol *sym, struct map *map, int evidx,
                             int context)
 {
         struct dso *dso = map->dso;
-        const char *filename = dso->long_name, *d_filename;
+        char *filename;
+        const char *d_filename;
         struct annotation *notes = symbol__annotation(sym);
         struct disasm_line *pos, *queue = NULL;
         u64 start = map__rip_2objdump(map, sym->start);
@@ -990,6 +993,10 @@ int symbol__annotate_printf(struct symbol *sym, struct map *map, int evidx,
         int more = 0;
         u64 len;
 
+        filename = strdup(dso->long_name);
+        if (!filename)
+                return -ENOMEM;
+
         if (full_paths)
                 d_filename = filename;
         else
@@ -1040,6 +1047,8 @@ int symbol__annotate_printf(struct symbol *sym, struct map *map, int evidx,
                 }
         }
 
+        free(filename);
+
         return more;
 }
 
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 78a5692dd718..9b5b21e7b032 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -7,6 +7,7 @@
 #include "symbol.h"
 #include <linux/list.h>
 #include <linux/rbtree.h>
+#include <pthread.h>
 
 struct ins;
 
@@ -125,7 +126,7 @@ int symbol__alloc_hist(struct symbol *sym);
 void symbol__annotate_zero_histograms(struct symbol *sym);
 
 int symbol__annotate(struct symbol *sym, struct map *map, size_t privsize);
-int symbol__annotate_init(struct map *map __used, struct symbol *sym);
+int symbol__annotate_init(struct map *map __maybe_unused, struct symbol *sym);
 int symbol__annotate_printf(struct symbol *sym, struct map *map, int evidx,
                             bool full_paths, int min_pcnt, int max_lines,
                             int context);
@@ -138,11 +139,12 @@ int symbol__tty_annotate(struct symbol *sym, struct map *map, int evidx,
                          int max_lines);
 
 #ifdef NO_NEWT_SUPPORT
-static inline int symbol__tui_annotate(struct symbol *sym __used,
-                                       struct map *map __used,
-                                       int evidx __used,
-                                       void(*timer)(void *arg) __used,
-                                       void *arg __used, int delay_secs __used)
+static inline int symbol__tui_annotate(struct symbol *sym __maybe_unused,
+                                       struct map *map __maybe_unused,
+                                       int evidx __maybe_unused,
+                                       void(*timer)(void *arg) __maybe_unused,
+                                       void *arg __maybe_unused,
+                                       int delay_secs __maybe_unused)
 {
         return 0;
 }
@@ -152,5 +154,6 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx,
 #endif
 
 extern const char       *disassembler_style;
+extern const char       *objdump_path;
 
 #endif  /* __PERF_ANNOTATE_H */
diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index fd9a5944b627..8e3a740ddbd4 100644
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -16,10 +16,10 @@
 #include "session.h"
 #include "tool.h"
 
-static int build_id__mark_dso_hit(struct perf_tool *tool __used,
+static int build_id__mark_dso_hit(struct perf_tool *tool __maybe_unused,
                                   union perf_event *event,
-                                  struct perf_sample *sample __used,
-                                  struct perf_evsel *evsel __used,
+                                  struct perf_sample *sample __maybe_unused,
+                                  struct perf_evsel *evsel __maybe_unused,
                                   struct machine *machine)
 {
         struct addr_location al;
@@ -41,9 +41,10 @@ static int build_id__mark_dso_hit(struct perf_tool *tool __used,
         return 0;
 }
 
-static int perf_event__exit_del_thread(struct perf_tool *tool __used,
+static int perf_event__exit_del_thread(struct perf_tool *tool __maybe_unused,
                                        union perf_event *event,
-                                       struct perf_sample *sample __used,
+                                       struct perf_sample *sample
+                                       __maybe_unused,
                                        struct machine *machine)
 {
         struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
index cff18c617d13..ab1769426541 100644
--- a/tools/perf/util/cache.h
+++ b/tools/perf/util/cache.h
@@ -39,7 +39,7 @@ static inline void setup_browser(bool fallback_to_pager)
         if (fallback_to_pager)
                 setup_pager();
 }
-static inline void exit_browser(bool wait_for_ok __used) {}
+static inline void exit_browser(bool wait_for_ok __maybe_unused) {}
 #else
 void setup_browser(bool fallback_to_pager);
 void exit_browser(bool wait_for_ok);
@@ -49,7 +49,7 @@ static inline int ui__init(void)
 {
         return -1;
 }
-static inline void ui__exit(bool wait_for_ok __used) {}
+static inline void ui__exit(bool wait_for_ok __maybe_unused) {}
 #else
 int ui__init(void);
 void ui__exit(bool wait_for_ok);
@@ -60,7 +60,7 @@ static inline int perf_gtk__init(void)
 {
         return -1;
 }
-static inline void perf_gtk__exit(bool wait_for_ok __used) {}
+static inline void perf_gtk__exit(bool wait_for_ok __maybe_unused) {}
 #else
 int perf_gtk__init(void);
 void perf_gtk__exit(bool wait_for_ok);
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 3a6bff47614f..d3b3f5d82137 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -93,7 +93,7 @@ __sort_chain_flat(struct rb_root *rb_root, struct callchain_node *node,
  */
 static void
 sort_chain_flat(struct rb_root *rb_root, struct callchain_root *root,
-                u64 min_hit, struct callchain_param *param __used)
+                u64 min_hit, struct callchain_param *param __maybe_unused)
 {
         __sort_chain_flat(rb_root, &root->node, min_hit);
 }
@@ -115,7 +115,7 @@ static void __sort_chain_graph_abs(struct callchain_node *node,
 
 static void
 sort_chain_graph_abs(struct rb_root *rb_root, struct callchain_root *chain_root,
-                     u64 min_hit, struct callchain_param *param __used)
+                     u64 min_hit, struct callchain_param *param __maybe_unused)
 {
         __sort_chain_graph_abs(&chain_root->node, min_hit);
         rb_root->rb_node = chain_root->node.rb_root.rb_node;
@@ -140,7 +140,7 @@ static void __sort_chain_graph_rel(struct callchain_node *node,
 
 static void
 sort_chain_graph_rel(struct rb_root *rb_root, struct callchain_root *chain_root,
-                     u64 min_hit __used, struct callchain_param *param)
+                     u64 min_hit __maybe_unused, struct callchain_param *param)
 {
         __sort_chain_graph_rel(&chain_root->node, param->min_percent / 100.0);
         rb_root->rb_node = chain_root->node.rb_root.rb_node;
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 3bdb407f9cd9..eb340571e7d6 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -58,7 +58,7 @@ struct callchain_list {
 /*
  * A callchain cursor is a single linked list that
  * let one feed a callchain progressively.
- * It keeps persitent allocated entries to minimize
+ * It keeps persistent allocated entries to minimize
  * allocations.
  */
 struct callchain_cursor_node {
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index dbe2f16b1a1a..96bbda1ddb83 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -138,8 +138,8 @@ void close_cgroup(struct cgroup_sel *cgrp)
         }
 }
 
-int parse_cgroups(const struct option *opt __used, const char *str,
-                  int unset __used)
+int parse_cgroups(const struct option *opt __maybe_unused, const char *str,
+                  int unset __maybe_unused)
 {
         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
         const char *p, *e, *eos = str + strlen(str);
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 6faa3a18bfbd..3e0fdd369ccb 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -342,13 +342,15 @@ const char *perf_config_dirname(const char *name, const char *value)
         return value;
 }
 
-static int perf_default_core_config(const char *var __used, const char *value __used)
+static int perf_default_core_config(const char *var __maybe_unused,
+                                    const char *value __maybe_unused)
 {
         /* Add other config variables here. */
         return 0;
 }
 
-int perf_default_config(const char *var, const char *value, void *dummy __used)
+int perf_default_config(const char *var, const char *value,
+                        void *dummy __maybe_unused)
 {
         if (!prefixcmp(var, "core."))
                 return perf_default_core_config(var, value);
diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
index adc72f09914d..2b32ffa9ebdb 100644
--- a/tools/perf/util/cpumap.c
+++ b/tools/perf/util/cpumap.c
@@ -38,24 +38,19 @@ static struct cpu_map *cpu_map__trim_new(int nr_cpus, int *tmp_cpus)
         return cpus;
 }
 
-static struct cpu_map *cpu_map__read_all_cpu_map(void)
+struct cpu_map *cpu_map__read(FILE *file)
 {
         struct cpu_map *cpus = NULL;
-        FILE *onlnf;
         int nr_cpus = 0;
         int *tmp_cpus = NULL, *tmp;
         int max_entries = 0;
         int n, cpu, prev;
         char sep;
 
-        onlnf = fopen("/sys/devices/system/cpu/online", "r");
-        if (!onlnf)
-                return cpu_map__default_new();
-
         sep = 0;
         prev = -1;
         for (;;) {
-                n = fscanf(onlnf, "%u%c", &cpu, &sep);
+                n = fscanf(file, "%u%c", &cpu, &sep);
                 if (n <= 0)
                         break;
                 if (prev >= 0) {
@@ -95,6 +90,19 @@ static struct cpu_map *cpu_map__read_all_cpu_map(void)
                 cpus = cpu_map__default_new();
 out_free_tmp:
         free(tmp_cpus);
+        return cpus;
+}
+
+static struct cpu_map *cpu_map__read_all_cpu_map(void)
+{
+        struct cpu_map *cpus = NULL;
+        FILE *onlnf;
+
+        onlnf = fopen("/sys/devices/system/cpu/online", "r");
+        if (!onlnf)
+                return cpu_map__default_new();
+
+        cpus = cpu_map__read(onlnf);
         fclose(onlnf);
         return cpus;
 }
diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
index c41518573c6a..2f68a3b8c285 100644
--- a/tools/perf/util/cpumap.h
+++ b/tools/perf/util/cpumap.h
@@ -2,6 +2,7 @@
 #define __PERF_CPUMAP_H
 
 #include <stdio.h>
+#include <stdbool.h>
 
 struct cpu_map {
         int nr;
@@ -11,7 +12,17 @@ struct cpu_map {
 struct cpu_map *cpu_map__new(const char *cpu_list);
 struct cpu_map *cpu_map__dummy_new(void);
 void cpu_map__delete(struct cpu_map *map);
-
+struct cpu_map *cpu_map__read(FILE *file);
 size_t cpu_map__fprintf(struct cpu_map *map, FILE *fp);
 
+static inline int cpu_map__nr(const struct cpu_map *map)
+{
+        return map ? map->nr : 1;
+}
+
+static inline bool cpu_map__all(const struct cpu_map *map)
+{
+        return map ? map->map[0] == -1 : true;
+}
+
 #endif /* __PERF_CPUMAP_H */
diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c
index 4dfe0bb3c322..66eb3828ceb5 100644
--- a/tools/perf/util/debug.c
+++ b/tools/perf/util/debug.c
@@ -23,8 +23,10 @@ int eprintf(int level, const char *fmt, ...)
 
         if (verbose >= level) {
                 va_start(args, fmt);
-                if (use_browser > 0)
+                if (use_browser == 1)
                         ret = ui_helpline__show_help(fmt, args);
+                else if (use_browser == 2)
+                        ret = perf_gtk__show_helpline(fmt, args);
                 else
                         ret = vfprintf(stderr, fmt, args);
                 va_end(args);
diff --git a/tools/perf/util/debug.h b/tools/perf/util/debug.h
index 015c91dbc096..bb2e7d1007ab 100644
--- a/tools/perf/util/debug.h
+++ b/tools/perf/util/debug.h
@@ -4,6 +4,7 @@
 
 #include <stdbool.h>
 #include "event.h"
+#include "../ui/helpline.h"
 
 extern int verbose;
 extern bool quiet, dump_trace;
@@ -15,32 +16,26 @@ struct ui_progress;
 struct perf_error_ops;
 
 #if defined(NO_NEWT_SUPPORT) && defined(NO_GTK2_SUPPORT)
-static inline int ui_helpline__show_help(const char *format __used, va_list ap __used)
-{
-        return 0;
-}
-
-static inline void ui_progress__update(u64 curr __used, u64 total __used,
-                                       const char *title __used) {}
+static inline void ui_progress__update(u64 curr __maybe_unused,
+                                       u64 total __maybe_unused,
+                                       const char *title __maybe_unused) {}
 
 #define ui__error(format, arg...) ui__warning(format, ##arg)
 
 static inline int
-perf_error__register(struct perf_error_ops *eops __used)
+perf_error__register(struct perf_error_ops *eops __maybe_unused)
 {
         return 0;
 }
 
 static inline int
-perf_error__unregister(struct perf_error_ops *eops __used)
+perf_error__unregister(struct perf_error_ops *eops __maybe_unused)
 {
         return 0;
 }
 
 #else /* NO_NEWT_SUPPORT && NO_GTK2_SUPPORT */
 
-extern char ui_helpline__last_msg[];
-int ui_helpline__show_help(const char *format, va_list ap);
 #include "../ui/progress.h"
 int ui__error(const char *format, ...) __attribute__((format(printf, 1, 2)));
 #include "../ui/util.h"
diff --git a/tools/perf/util/dso-test-data.c b/tools/perf/util/dso-test-data.c
index 541cdc72c7df..c6caedeb1d6b 100644
--- a/tools/perf/util/dso-test-data.c
+++ b/tools/perf/util/dso-test-data.c
@@ -23,7 +23,7 @@ static char *test_file(int size)
         int fd, i;
         unsigned char *buf;
 
-        fd = mkostemp(templ, O_CREAT|O_WRONLY|O_TRUNC);
+        fd = mkstemp(templ);
 
         buf = malloc(size);
         if (!buf) {
diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c
index ee51e9b4dc09..3e5f5430a28a 100644
--- a/tools/perf/util/dwarf-aux.c
+++ b/tools/perf/util/dwarf-aux.c
@@ -804,6 +804,8 @@ int die_get_typename(Dwarf_Die *vr_die, char *buf, int len)
                         tmp = "union ";
                 else if (tag == DW_TAG_structure_type)
                         tmp = "struct ";
+                else if (tag == DW_TAG_enumeration_type)
+                        tmp = "enum ";
                 /* Write a base name */
                 ret = snprintf(buf, len, "%s%s", tmp, dwarf_diename(&type));
                 return (ret >= len) ? -E2BIG : ret;
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 2a6f33cd888c..6715b1938725 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -112,7 +112,7 @@ static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
         event->comm.header.type = PERF_RECORD_COMM;
 
         size = strlen(event->comm.comm) + 1;
-        size = ALIGN(size, sizeof(u64));
+        size = PERF_ALIGN(size, sizeof(u64));
         memset(event->comm.comm + size, 0, machine->id_hdr_size);
         event->comm.header.size = (sizeof(event->comm) -
                                 (sizeof(event->comm.comm) - size) +
@@ -120,7 +120,9 @@ static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
         if (!full) {
                 event->comm.tid = pid;
 
-                process(tool, event, &synth_sample, machine);
+                if (process(tool, event, &synth_sample, machine) != 0)
+                        return -1;
+
                 goto out;
         }
 
@@ -143,7 +145,7 @@ static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
                                          sizeof(event->comm.comm));
 
                 size = strlen(event->comm.comm) + 1;
-                size = ALIGN(size, sizeof(u64));
+                size = PERF_ALIGN(size, sizeof(u64));
                 memset(event->comm.comm + size, 0, machine->id_hdr_size);
                 event->comm.header.size = (sizeof(event->comm) -
                                           (sizeof(event->comm.comm) - size) +
@@ -151,7 +153,10 @@ static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 
                 event->comm.tid = pid;
 
-                process(tool, event, &synth_sample, machine);
+                if (process(tool, event, &synth_sample, machine) != 0) {
+                        tgid = -1;
+                        break;
+                }
         }
 
         closedir(tasks);
@@ -167,6 +172,7 @@ static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 {
         char filename[PATH_MAX];
         FILE *fp;
+        int rc = 0;
 
         snprintf(filename, sizeof(filename), "/proc/%d/maps", pid);
 
@@ -222,7 +228,7 @@ static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
                         size = strlen(execname);
                         execname[size - 1] = '\0'; /* Remove \n */
                         memcpy(event->mmap.filename, execname, size);
-                        size = ALIGN(size, sizeof(u64));
+                        size = PERF_ALIGN(size, sizeof(u64));
                         event->mmap.len -= event->mmap.start;
                         event->mmap.header.size = (sizeof(event->mmap) -
                                                 (sizeof(event->mmap.filename) - size));
@@ -231,18 +237,22 @@ static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
                         event->mmap.pid = tgid;
                         event->mmap.tid = pid;
 
-                        process(tool, event, &synth_sample, machine);
+                        if (process(tool, event, &synth_sample, machine) != 0) {
+                                rc = -1;
+                                break;
+                        }
                 }
         }
 
         fclose(fp);
-        return 0;
+        return rc;
 }
 
 int perf_event__synthesize_modules(struct perf_tool *tool,
                                    perf_event__handler_t process,
                                    struct machine *machine)
 {
+        int rc = 0;
         struct rb_node *nd;
         struct map_groups *kmaps = &machine->kmaps;
         union perf_event *event = zalloc((sizeof(event->mmap) +
@@ -272,7 +282,7 @@ int perf_event__synthesize_modules(struct perf_tool *tool,
                 if (pos->dso->kernel)
                         continue;
 
-                size = ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
+                size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
                 event->mmap.header.type = PERF_RECORD_MMAP;
                 event->mmap.header.size = (sizeof(event->mmap) -
                                         (sizeof(event->mmap.filename) - size));
@@ -284,11 +294,14 @@ int perf_event__synthesize_modules(struct perf_tool *tool,
 
                 memcpy(event->mmap.filename, pos->dso->long_name,
                        pos->dso->long_name_len + 1);
-                process(tool, event, &synth_sample, machine);
+                if (process(tool, event, &synth_sample, machine) != 0) {
+                        rc = -1;
+                        break;
+                }
         }
 
         free(event);
-        return 0;
+        return rc;
 }
 
 static int __event__synthesize_thread(union perf_event *comm_event,
@@ -392,12 +405,16 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
                 if (*end) /* only interested in proper numerical dirents */
                         continue;
 
-                __event__synthesize_thread(comm_event, mmap_event, pid, 1,
-                                           process, tool, machine);
+                if (__event__synthesize_thread(comm_event, mmap_event, pid, 1,
+                                           process, tool, machine) != 0) {
+                        err = -1;
+                        goto out_closedir;
+                }
         }
 
-        closedir(proc);
         err = 0;
+out_closedir:
+        closedir(proc);
 out_free_mmap:
         free(mmap_event);
 out_free_comm:
@@ -412,7 +429,7 @@ struct process_symbol_args {
 };
 
 static int find_symbol_cb(void *arg, const char *name, char type,
-                          u64 start, u64 end __used)
+                          u64 start)
 {
         struct process_symbol_args *args = arg;
 
@@ -477,7 +494,7 @@ int perf_event__synthesize_kernel_mmap(struct perf_tool *tool,
         map = machine->vmlinux_maps[MAP__FUNCTION];
         size = snprintf(event->mmap.filename, sizeof(event->mmap.filename),
                         "%s%s", mmap_name, symbol_name) + 1;
-        size = ALIGN(size, sizeof(u64));
+        size = PERF_ALIGN(size, sizeof(u64));
         event->mmap.header.type = PERF_RECORD_MMAP;
         event->mmap.header.size = (sizeof(event->mmap) -
                         (sizeof(event->mmap.filename) - size) + machine->id_hdr_size);
@@ -497,9 +514,9 @@ size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
         return fprintf(fp, ": %s:%d\n", event->comm.comm, event->comm.tid);
 }
 
-int perf_event__process_comm(struct perf_tool *tool __used,
+int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
                              union perf_event *event,
-                             struct perf_sample *sample __used,
+                             struct perf_sample *sample __maybe_unused,
                              struct machine *machine)
 {
         struct thread *thread = machine__findnew_thread(machine, event->comm.tid);
@@ -515,10 +532,10 @@ int perf_event__process_comm(struct perf_tool *tool __used,
         return 0;
 }
 
-int perf_event__process_lost(struct perf_tool *tool __used,
+int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
                              union perf_event *event,
-                             struct perf_sample *sample __used,
-                             struct machine *machine __used)
+                             struct perf_sample *sample __maybe_unused,
+                             struct machine *machine __maybe_unused)
 {
         dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n",
                     event->lost.id, event->lost.lost);
@@ -538,7 +555,8 @@ static void perf_event__set_kernel_mmap_len(union perf_event *event,
                 maps[MAP__FUNCTION]->end = ~0ULL;
 }
 
-static int perf_event__process_kernel_mmap(struct perf_tool *tool __used,
+static int perf_event__process_kernel_mmap(struct perf_tool *tool
+                                           __maybe_unused,
                                            union perf_event *event,
                                            struct machine *machine)
 {
@@ -640,7 +658,7 @@ size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
 
 int perf_event__process_mmap(struct perf_tool *tool,
                              union perf_event *event,
-                             struct perf_sample *sample __used,
+                             struct perf_sample *sample __maybe_unused,
                              struct machine *machine)
 {
         struct thread *thread;
@@ -684,9 +702,9 @@ size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
                        event->fork.ppid, event->fork.ptid);
 }
 
-int perf_event__process_task(struct perf_tool *tool __used,
+int perf_event__process_task(struct perf_tool *tool __maybe_unused,
                              union perf_event *event,
-                             struct perf_sample *sample __used,
+                             struct perf_sample *sample __maybe_unused,
                               struct machine *machine)
 {
         struct thread *thread = machine__findnew_thread(machine, event->fork.tid);
@@ -886,8 +904,9 @@ int perf_event__preprocess_sample(const union perf_event *event,
                 al->sym = map__find_symbol(al->map, al->addr, filter);
         }
 
-        if (symbol_conf.sym_list && al->sym &&
-            !strlist__has_entry(symbol_conf.sym_list, al->sym->name))
+        if (symbol_conf.sym_list &&
+                (!al->sym || !strlist__has_entry(symbol_conf.sym_list,
+                                                al->sym->name)))
                 goto out_filtered;
 
         return 0;
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index d84870b06426..21b99e741a87 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -69,6 +69,16 @@ struct sample_event {
         u64 array[];
 };
 
+struct regs_dump {
+        u64 *regs;
+};
+
+struct stack_dump {
+        u16 offset;
+        u64 size;
+        char *data;
+};
+
 struct perf_sample {
         u64 ip;
         u32 pid, tid;
@@ -82,6 +92,8 @@ struct perf_sample {
         void *raw_data;
         struct ip_callchain *callchain;
         struct branch_stack *branch_stack;
+        struct regs_dump  user_regs;
+        struct stack_dump user_stack;
 };
 
 #define BUILD_ID_SIZE 20
@@ -89,7 +101,7 @@ struct perf_sample {
 struct build_id_event {
         struct perf_event_header header;
         pid_t                    pid;
-        u8                       build_id[ALIGN(BUILD_ID_SIZE, sizeof(u64))];
+        u8                       build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
         char                     filename[];
 };
 
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 9b38681add9e..ae89686102f4 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -57,7 +57,7 @@ void perf_evlist__config_attrs(struct perf_evlist *evlist,
         if (evlist->cpus->map[0] < 0)
                 opts->no_inherit = true;
 
-        first = list_entry(evlist->entries.next, struct perf_evsel, node);
+        first = perf_evlist__first(evlist);
 
         list_for_each_entry(evsel, &evlist->entries, node) {
                 perf_evsel__config(evsel, opts, first);
@@ -108,6 +108,25 @@ void perf_evlist__splice_list_tail(struct perf_evlist *evlist,
         evlist->nr_entries += nr_entries;
 }
 
+void __perf_evlist__set_leader(struct list_head *list)
+{
+        struct perf_evsel *evsel, *leader;
+
+        leader = list_entry(list->next, struct perf_evsel, node);
+        leader->leader = NULL;
+
+        list_for_each_entry(evsel, list, node) {
+                if (evsel != leader)
+                        evsel->leader = leader;
+        }
+}
+
+void perf_evlist__set_leader(struct perf_evlist *evlist)
+{
+        if (evlist->nr_entries)
+                __perf_evlist__set_leader(&evlist->entries);
+}
+
 int perf_evlist__add_default(struct perf_evlist *evlist)
 {
         struct perf_event_attr attr = {
@@ -285,7 +304,7 @@ void perf_evlist__enable(struct perf_evlist *evlist)
         int cpu, thread;
         struct perf_evsel *pos;
 
-        for (cpu = 0; cpu < evlist->cpus->nr; cpu++) {
+        for (cpu = 0; cpu < cpu_map__nr(evlist->cpus); cpu++) {
                 list_for_each_entry(pos, &evlist->entries, node) {
                         for (thread = 0; thread < evlist->threads->nr; thread++)
                                 ioctl(FD(pos, cpu, thread),
@@ -296,7 +315,7 @@ void perf_evlist__enable(struct perf_evlist *evlist)
 
 static int perf_evlist__alloc_pollfd(struct perf_evlist *evlist)
 {
-        int nfds = evlist->cpus->nr * evlist->threads->nr * evlist->nr_entries;
+        int nfds = cpu_map__nr(evlist->cpus) * evlist->threads->nr * evlist->nr_entries;
         evlist->pollfd = malloc(sizeof(struct pollfd) * nfds);
         return evlist->pollfd != NULL ? 0 : -ENOMEM;
 }
@@ -357,7 +376,7 @@ struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
         int hash;
 
         if (evlist->nr_entries == 1)
-                return list_entry(evlist->entries.next, struct perf_evsel, node);
+                return perf_evlist__first(evlist);
 
         hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
         head = &evlist->heads[hash];
@@ -367,7 +386,7 @@ struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
                         return sid->evsel;
 
         if (!perf_evlist__sample_id_all(evlist))
-                return list_entry(evlist->entries.next, struct perf_evsel, node);
+                return perf_evlist__first(evlist);
 
         return NULL;
 }
@@ -456,8 +475,8 @@ void perf_evlist__munmap(struct perf_evlist *evlist)
 
 static int perf_evlist__alloc_mmap(struct perf_evlist *evlist)
 {
-        evlist->nr_mmaps = evlist->cpus->nr;
-        if (evlist->cpus->map[0] == -1)
+        evlist->nr_mmaps = cpu_map__nr(evlist->cpus);
+        if (cpu_map__all(evlist->cpus))
                 evlist->nr_mmaps = evlist->threads->nr;
         evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap));
         return evlist->mmap != NULL ? 0 : -ENOMEM;
@@ -603,11 +622,11 @@ int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
         list_for_each_entry(evsel, &evlist->entries, node) {
                 if ((evsel->attr.read_format & PERF_FORMAT_ID) &&
                     evsel->sample_id == NULL &&
-                    perf_evsel__alloc_id(evsel, cpus->nr, threads->nr) < 0)
+                    perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0)
                         return -ENOMEM;
         }
 
-        if (evlist->cpus->map[0] == -1)
+        if (cpu_map__all(cpus))
                 return perf_evlist__mmap_per_thread(evlist, prot, mask);
 
         return perf_evlist__mmap_per_cpu(evlist, prot, mask);
@@ -647,39 +666,44 @@ void perf_evlist__delete_maps(struct perf_evlist *evlist)
         evlist->threads = NULL;
 }
 
-int perf_evlist__set_filters(struct perf_evlist *evlist)
+int perf_evlist__apply_filters(struct perf_evlist *evlist)
 {
-        const struct thread_map *threads = evlist->threads;
-        const struct cpu_map *cpus = evlist->cpus;
         struct perf_evsel *evsel;
-        char *filter;
-        int thread;
-        int cpu;
-        int err;
-        int fd;
+        int err = 0;
+        const int ncpus = cpu_map__nr(evlist->cpus),
+                  nthreads = evlist->threads->nr;
 
         list_for_each_entry(evsel, &evlist->entries, node) {
-                filter = evsel->filter;
-                if (!filter)
+                if (evsel->filter == NULL)
                         continue;
-                for (cpu = 0; cpu < cpus->nr; cpu++) {
-                        for (thread = 0; thread < threads->nr; thread++) {
-                                fd = FD(evsel, cpu, thread);
-                                err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter);
-                                if (err)
-                                        return err;
-                        }
-                }
+
+                err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter);
+                if (err)
+                        break;
         }
 
-        return 0;
+        return err;
 }
 
-bool perf_evlist__valid_sample_type(const struct perf_evlist *evlist)
+int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter)
 {
-        struct perf_evsel *pos, *first;
+        struct perf_evsel *evsel;
+        int err = 0;
+        const int ncpus = cpu_map__nr(evlist->cpus),
+                  nthreads = evlist->threads->nr;
+
+        list_for_each_entry(evsel, &evlist->entries, node) {
+                err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter);
+                if (err)
+                        break;
+        }
+
+        return err;
+}
 
-        pos = first = list_entry(evlist->entries.next, struct perf_evsel, node);
+bool perf_evlist__valid_sample_type(struct perf_evlist *evlist)
+{
+        struct perf_evsel *first = perf_evlist__first(evlist), *pos = first;
 
         list_for_each_entry_continue(pos, &evlist->entries, node) {
                 if (first->attr.sample_type != pos->attr.sample_type)
@@ -689,23 +713,19 @@ bool perf_evlist__valid_sample_type(const struct perf_evlist *evlist)
         return true;
 }
 
-u64 perf_evlist__sample_type(const struct perf_evlist *evlist)
+u64 perf_evlist__sample_type(struct perf_evlist *evlist)
 {
-        struct perf_evsel *first;
-
-        first = list_entry(evlist->entries.next, struct perf_evsel, node);
+        struct perf_evsel *first = perf_evlist__first(evlist);
         return first->attr.sample_type;
 }
 
-u16 perf_evlist__id_hdr_size(const struct perf_evlist *evlist)
+u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist)
 {
-        struct perf_evsel *first;
+        struct perf_evsel *first = perf_evlist__first(evlist);
         struct perf_sample *data;
         u64 sample_type;
         u16 size = 0;
 
-        first = list_entry(evlist->entries.next, struct perf_evsel, node);
-
         if (!first->attr.sample_id_all)
                 goto out;
 
@@ -729,11 +749,9 @@ out:
         return size;
 }
 
-bool perf_evlist__valid_sample_id_all(const struct perf_evlist *evlist)
+bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist)
 {
-        struct perf_evsel *pos, *first;
-
-        pos = first = list_entry(evlist->entries.next, struct perf_evsel, node);
+        struct perf_evsel *first = perf_evlist__first(evlist), *pos = first;
 
         list_for_each_entry_continue(pos, &evlist->entries, node) {
                 if (first->attr.sample_id_all != pos->attr.sample_id_all)
@@ -743,11 +761,9 @@ bool perf_evlist__valid_sample_id_all(const struct perf_evlist *evlist)
         return true;
 }
 
-bool perf_evlist__sample_id_all(const struct perf_evlist *evlist)
+bool perf_evlist__sample_id_all(struct perf_evlist *evlist)
 {
-        struct perf_evsel *first;
-
-        first = list_entry(evlist->entries.next, struct perf_evsel, node);
+        struct perf_evsel *first = perf_evlist__first(evlist);
         return first->attr.sample_id_all;
 }
 
@@ -757,21 +773,13 @@ void perf_evlist__set_selected(struct perf_evlist *evlist,
         evlist->selected = evsel;
 }
 
-int perf_evlist__open(struct perf_evlist *evlist, bool group)
+int perf_evlist__open(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel, *first;
+        struct perf_evsel *evsel;
         int err, ncpus, nthreads;
 
-        first = list_entry(evlist->entries.next, struct perf_evsel, node);
-
         list_for_each_entry(evsel, &evlist->entries, node) {
-                struct xyarray *group_fd = NULL;
-
-                if (group && evsel != first)
-                        group_fd = first->fd;
-
-                err = perf_evsel__open(evsel, evlist->cpus, evlist->threads,
-                                       group, group_fd);
+                err = perf_evsel__open(evsel, evlist->cpus, evlist->threads);
                 if (err < 0)
                         goto out_err;
         }
@@ -883,8 +891,21 @@ int perf_evlist__start_workload(struct perf_evlist *evlist)
 }
 
 int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,
-                              struct perf_sample *sample, bool swapped)
+                              struct perf_sample *sample)
+{
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
+        return perf_evsel__parse_sample(evsel, event, sample);
+}
+
+size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp)
 {
-        struct perf_evsel *e = list_entry(evlist->entries.next, struct perf_evsel, node);
-        return perf_evsel__parse_sample(e, event, sample, swapped);
+        struct perf_evsel *evsel;
+        size_t printed = 0;
+
+        list_for_each_entry(evsel, &evlist->entries, node) {
+                printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "",
+                                   perf_evsel__name(evsel));
+        }
+
+        return printed + fprintf(fp, "\n");;
 }
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 528c1acd9298..3f1fb66be022 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -5,6 +5,7 @@
 #include <stdio.h>
 #include "../perf.h"
 #include "event.h"
+#include "evsel.h"
 #include "util.h"
 #include <unistd.h>
 
@@ -41,8 +42,6 @@ struct perf_evsel_str_handler {
         void       *handler;
 };
 
-struct perf_evsel;
-
 struct perf_evlist *perf_evlist__new(struct cpu_map *cpus,
                                      struct thread_map *threads);
 void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
@@ -73,6 +72,8 @@ int perf_evlist__set_tracepoints_handlers(struct perf_evlist *evlist,
 #define perf_evlist__set_tracepoints_handlers_array(evlist, array) \
         perf_evlist__set_tracepoints_handlers(evlist, array, ARRAY_SIZE(array))
 
+int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter);
+
 struct perf_evsel *
 perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id);
 
@@ -85,7 +86,7 @@ struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);
 
 union perf_event *perf_evlist__mmap_read(struct perf_evlist *self, int idx);
 
-int perf_evlist__open(struct perf_evlist *evlist, bool group);
+int perf_evlist__open(struct perf_evlist *evlist);
 
 void perf_evlist__config_attrs(struct perf_evlist *evlist,
                                struct perf_record_opts *opts);
@@ -116,20 +117,34 @@ static inline void perf_evlist__set_maps(struct perf_evlist *evlist,
 int perf_evlist__create_maps(struct perf_evlist *evlist,
                              struct perf_target *target);
 void perf_evlist__delete_maps(struct perf_evlist *evlist);
-int perf_evlist__set_filters(struct perf_evlist *evlist);
+int perf_evlist__apply_filters(struct perf_evlist *evlist);
+
+void __perf_evlist__set_leader(struct list_head *list);
+void perf_evlist__set_leader(struct perf_evlist *evlist);
 
-u64 perf_evlist__sample_type(const struct perf_evlist *evlist);
-bool perf_evlist__sample_id_all(const const struct perf_evlist *evlist);
-u16 perf_evlist__id_hdr_size(const struct perf_evlist *evlist);
+u64 perf_evlist__sample_type(struct perf_evlist *evlist);
+bool perf_evlist__sample_id_all(struct perf_evlist *evlist);
+u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist);
 
 int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,
-                              struct perf_sample *sample, bool swapped);
+                              struct perf_sample *sample);
 
-bool perf_evlist__valid_sample_type(const struct perf_evlist *evlist);
-bool perf_evlist__valid_sample_id_all(const struct perf_evlist *evlist);
+bool perf_evlist__valid_sample_type(struct perf_evlist *evlist);
+bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist);
 
 void perf_evlist__splice_list_tail(struct perf_evlist *evlist,
                                    struct list_head *list,
                                    int nr_entries);
 
+static inline struct perf_evsel *perf_evlist__first(struct perf_evlist *evlist)
+{
+        return list_entry(evlist->entries.next, struct perf_evsel, node);
+}
+
+static inline struct perf_evsel *perf_evlist__last(struct perf_evlist *evlist)
+{
+        return list_entry(evlist->entries.prev, struct perf_evsel, node);
+}
+
+size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp);
 #endif /* __PERF_EVLIST_H */
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 2eaae140def2..ffdd94e9c9c3 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -8,7 +8,10 @@
  */
 
 #include <byteswap.h>
+#include <linux/bitops.h>
 #include "asm/bug.h"
+#include "debugfs.h"
+#include "event-parse.h"
 #include "evsel.h"
 #include "evlist.h"
 #include "util.h"
@@ -16,9 +19,10 @@
 #include "thread_map.h"
 #include "target.h"
 #include "../../../include/linux/hw_breakpoint.h"
+#include "../../include/linux/perf_event.h"
+#include "perf_regs.h"
 
 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
-#define GROUP_FD(group_fd, cpu) (*(int *)xyarray__entry(group_fd, cpu, 0))
 
 static int __perf_evsel__sample_size(u64 sample_type)
 {
@@ -66,7 +70,80 @@ struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
         return evsel;
 }
 
-static const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
+struct event_format *event_format__new(const char *sys, const char *name)
+{
+        int fd, n;
+        char *filename;
+        void *bf = NULL, *nbf;
+        size_t size = 0, alloc_size = 0;
+        struct event_format *format = NULL;
+
+        if (asprintf(&filename, "%s/%s/%s/format", tracing_events_path, sys, name) < 0)
+                goto out;
+
+        fd = open(filename, O_RDONLY);
+        if (fd < 0)
+                goto out_free_filename;
+
+        do {
+                if (size == alloc_size) {
+                        alloc_size += BUFSIZ;
+                        nbf = realloc(bf, alloc_size);
+                        if (nbf == NULL)
+                                goto out_free_bf;
+                        bf = nbf;
+                }
+
+                n = read(fd, bf + size, BUFSIZ);
+                if (n < 0)
+                        goto out_free_bf;
+                size += n;
+        } while (n > 0);
+
+        pevent_parse_format(&format, bf, size, sys);
+
+out_free_bf:
+        free(bf);
+        close(fd);
+out_free_filename:
+        free(filename);
+out:
+        return format;
+}
+
+struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name, int idx)
+{
+        struct perf_evsel *evsel = zalloc(sizeof(*evsel));
+
+        if (evsel != NULL) {
+                struct perf_event_attr attr = {
+                        .type          = PERF_TYPE_TRACEPOINT,
+                        .sample_type   = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
+                                          PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
+                };
+
+                if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
+                        goto out_free;
+
+                evsel->tp_format = event_format__new(sys, name);
+                if (evsel->tp_format == NULL)
+                        goto out_free;
+
+                event_attr_init(&attr);
+                attr.config = evsel->tp_format->id;
+                attr.sample_period = 1;
+                perf_evsel__init(evsel, &attr, idx);
+        }
+
+        return evsel;
+
+out_free:
+        free(evsel->name);
+        free(evsel);
+        return NULL;
+}
+
+const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
         "cycles",
         "instructions",
         "cache-references",
@@ -129,12 +206,12 @@ static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
         return r + perf_evsel__add_modifiers(evsel, bf + r, size - r);
 }
 
-static const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
+const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX] = {
         "cpu-clock",
         "task-clock",
         "page-faults",
         "context-switches",
-        "CPU-migrations",
+        "cpu-migrations",
         "minor-faults",
         "major-faults",
         "alignment-faults",
@@ -317,7 +394,8 @@ const char *perf_evsel__name(struct perf_evsel *evsel)
                 break;
 
         default:
-                scnprintf(bf, sizeof(bf), "%s", "unknown attr type");
+                scnprintf(bf, sizeof(bf), "unknown attr type: %d",
+                          evsel->attr.type);
                 break;
         }
 
@@ -367,9 +445,18 @@ void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts,
                 attr->mmap_data = track;
         }
 
-        if (opts->call_graph)
+        if (opts->call_graph) {
                 attr->sample_type       |= PERF_SAMPLE_CALLCHAIN;
 
+                if (opts->call_graph == CALLCHAIN_DWARF) {
+                        attr->sample_type |= PERF_SAMPLE_REGS_USER |
+                                             PERF_SAMPLE_STACK_USER;
+                        attr->sample_regs_user = PERF_REGS_MASK;
+                        attr->sample_stack_user = opts->stack_dump_size;
+                        attr->exclude_callchain_user = 1;
+                }
+        }
+
         if (perf_target__has_cpu(&opts->target))
                 attr->sample_type       |= PERF_SAMPLE_CPU;
 
@@ -421,6 +508,24 @@ int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
         return evsel->fd != NULL ? 0 : -ENOMEM;
 }
 
+int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
+                           const char *filter)
+{
+        int cpu, thread;
+
+        for (cpu = 0; cpu < ncpus; cpu++) {
+                for (thread = 0; thread < nthreads; thread++) {
+                        int fd = FD(evsel, cpu, thread),
+                            err = ioctl(fd, PERF_EVENT_IOC_SET_FILTER, filter);
+
+                        if (err)
+                                return err;
+                }
+        }
+
+        return 0;
+}
+
 int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
 {
         evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
@@ -481,6 +586,9 @@ void perf_evsel__delete(struct perf_evsel *evsel)
 {
         perf_evsel__exit(evsel);
         close_cgroup(evsel->cgrp);
+        free(evsel->group_name);
+        if (evsel->tp_format)
+                pevent_free_format(evsel->tp_format);
         free(evsel->name);
         free(evsel);
 }
@@ -556,9 +664,28 @@ int __perf_evsel__read(struct perf_evsel *evsel,
         return 0;
 }
 
+static int get_group_fd(struct perf_evsel *evsel, int cpu, int thread)
+{
+        struct perf_evsel *leader = evsel->leader;
+        int fd;
+
+        if (!leader)
+                return -1;
+
+        /*
+         * Leader must be already processed/open,
+         * if not it's a bug.
+         */
+        BUG_ON(!leader->fd);
+
+        fd = FD(leader, cpu, thread);
+        BUG_ON(fd == -1);
+
+        return fd;
+}
+
 static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
-                              struct thread_map *threads, bool group,
-                              struct xyarray *group_fds)
+                              struct thread_map *threads)
 {
         int cpu, thread;
         unsigned long flags = 0;
@@ -574,13 +701,15 @@ static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
         }
 
         for (cpu = 0; cpu < cpus->nr; cpu++) {
-                int group_fd = group_fds ? GROUP_FD(group_fds, cpu) : -1;
 
                 for (thread = 0; thread < threads->nr; thread++) {
+                        int group_fd;
 
                         if (!evsel->cgrp)
                                 pid = threads->map[thread];
 
+                        group_fd = get_group_fd(evsel, cpu, thread);
+
                         FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
                                                                      pid,
                                                                      cpus->map[cpu],
@@ -589,9 +718,6 @@ static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
                                 err = -errno;
                                 goto out_close;
                         }
-
-                        if (group && group_fd == -1)
-                                group_fd = FD(evsel, cpu, thread);
                 }
         }
 
@@ -635,8 +761,7 @@ static struct {
 };
 
 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
-                     struct thread_map *threads, bool group,
-                     struct xyarray *group_fd)
+                     struct thread_map *threads)
 {
         if (cpus == NULL) {
                 /* Work around old compiler warnings about strict aliasing */
@@ -646,30 +771,28 @@ int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
         if (threads == NULL)
                 threads = &empty_thread_map.map;
 
-        return __perf_evsel__open(evsel, cpus, threads, group, group_fd);
+        return __perf_evsel__open(evsel, cpus, threads);
 }
 
 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
-                             struct cpu_map *cpus, bool group,
-                             struct xyarray *group_fd)
+                             struct cpu_map *cpus)
 {
-        return __perf_evsel__open(evsel, cpus, &empty_thread_map.map, group,
-                                  group_fd);
+        return __perf_evsel__open(evsel, cpus, &empty_thread_map.map);
 }
 
 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
-                                struct thread_map *threads, bool group,
-                                struct xyarray *group_fd)
+                                struct thread_map *threads)
 {
-        return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group,
-                                  group_fd);
+        return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
 }
 
-static int perf_event__parse_id_sample(const union perf_event *event, u64 type,
-                                       struct perf_sample *sample,
-                                       bool swapped)
+static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
+                                       const union perf_event *event,
+                                       struct perf_sample *sample)
 {
+        u64 type = evsel->attr.sample_type;
         const u64 *array = event->sample.array;
+        bool swapped = evsel->needs_swap;
         union u64_swap u;
 
         array += ((event->header.size -
@@ -730,9 +853,11 @@ static bool sample_overlap(const union perf_event *event,
 }
 
 int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
-                             struct perf_sample *data, bool swapped)
+                             struct perf_sample *data)
 {
         u64 type = evsel->attr.sample_type;
+        u64 regs_user = evsel->attr.sample_regs_user;
+        bool swapped = evsel->needs_swap;
         const u64 *array;
 
         /*
@@ -749,7 +874,7 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
         if (event->header.type != PERF_RECORD_SAMPLE) {
                 if (!evsel->attr.sample_id_all)
                         return 0;
-                return perf_event__parse_id_sample(event, type, data, swapped);
+                return perf_evsel__parse_id_sample(evsel, event, data);
         }
 
         array = event->sample.array;
@@ -869,6 +994,32 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
                 sz /= sizeof(u64);
                 array += sz;
         }
+
+        if (type & PERF_SAMPLE_REGS_USER) {
+                /* First u64 tells us if we have any regs in sample. */
+                u64 avail = *array++;
+
+                if (avail) {
+                        data->user_regs.regs = (u64 *)array;
+                        array += hweight_long(regs_user);
+                }
+        }
+
+        if (type & PERF_SAMPLE_STACK_USER) {
+                u64 size = *array++;
+
+                data->user_stack.offset = ((char *)(array - 1)
+                                          - (char *) event);
+
+                if (!size) {
+                        data->user_stack.size = 0;
+                } else {
+                        data->user_stack.data = (char *)array;
+                        array += size / sizeof(*array);
+                        data->user_stack.size = *array;
+                }
+        }
+
         return 0;
 }
 
@@ -947,3 +1098,72 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
 
         return 0;
 }
+
+struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name)
+{
+        return pevent_find_field(evsel->tp_format, name);
+}
+
+void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
+                         const char *name)
+{
+        struct format_field *field = perf_evsel__field(evsel, name);
+        int offset;
+
+        if (!field)
+                return NULL;
+
+        offset = field->offset;
+
+        if (field->flags & FIELD_IS_DYNAMIC) {
+                offset = *(int *)(sample->raw_data + field->offset);
+                offset &= 0xffff;
+        }
+
+        return sample->raw_data + offset;
+}
+
+u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
+                       const char *name)
+{
+        struct format_field *field = perf_evsel__field(evsel, name);
+        void *ptr;
+        u64 value;
+
+        if (!field)
+                return 0;
+
+        ptr = sample->raw_data + field->offset;
+
+        switch (field->size) {
+        case 1:
+                return *(u8 *)ptr;
+        case 2:
+                value = *(u16 *)ptr;
+                break;
+        case 4:
+                value = *(u32 *)ptr;
+                break;
+        case 8:
+                value = *(u64 *)ptr;
+                break;
+        default:
+                return 0;
+        }
+
+        if (!evsel->needs_swap)
+                return value;
+
+        switch (field->size) {
+        case 2:
+                return bswap_16(value);
+        case 4:
+                return bswap_32(value);
+        case 8:
+                return bswap_64(value);
+        default:
+                return 0;
+        }
+
+        return 0;
+}
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index b559929983bb..3ead0d59c03d 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -53,9 +53,10 @@ struct perf_evsel {
         u64                     *id;
         struct perf_counts      *counts;
         int                     idx;
-        int                     ids;
+        u32                     ids;
         struct hists            hists;
         char                    *name;
+        struct event_format     *tp_format;
         union {
                 void            *priv;
                 off_t           id_offset;
@@ -65,8 +66,14 @@ struct perf_evsel {
                 void            *func;
                 void            *data;
         } handler;
+        struct cpu_map          *cpus;
         unsigned int            sample_size;
         bool                    supported;
+        bool                    needs_swap;
+        /* parse modifier helper */
+        int                     exclude_GH;
+        struct perf_evsel       *leader;
+        char                    *group_name;
 };
 
 struct cpu_map;
@@ -75,6 +82,10 @@ struct perf_evlist;
 struct perf_record_opts;
 
 struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx);
+struct perf_evsel *perf_evsel__newtp(const char *sys, const char *name, int idx);
+
+struct event_format *event_format__new(const char *sys, const char *name);
+
 void perf_evsel__init(struct perf_evsel *evsel,
                       struct perf_event_attr *attr, int idx);
 void perf_evsel__exit(struct perf_evsel *evsel);
@@ -92,8 +103,10 @@ extern const char *perf_evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX]
                                        [PERF_EVSEL__MAX_ALIASES];
 extern const char *perf_evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX]
                                           [PERF_EVSEL__MAX_ALIASES];
-const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
-                                       [PERF_EVSEL__MAX_ALIASES];
+extern const char *perf_evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
+                                              [PERF_EVSEL__MAX_ALIASES];
+extern const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX];
+extern const char *perf_evsel__sw_names[PERF_COUNT_SW_MAX];
 int __perf_evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result,
                                             char *bf, size_t size);
 const char *perf_evsel__name(struct perf_evsel *evsel);
@@ -105,21 +118,46 @@ void perf_evsel__free_fd(struct perf_evsel *evsel);
 void perf_evsel__free_id(struct perf_evsel *evsel);
 void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads);
 
+int perf_evsel__set_filter(struct perf_evsel *evsel, int ncpus, int nthreads,
+                           const char *filter);
+
 int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
-                             struct cpu_map *cpus, bool group,
-                             struct xyarray *group_fds);
+                             struct cpu_map *cpus);
 int perf_evsel__open_per_thread(struct perf_evsel *evsel,
-                                struct thread_map *threads, bool group,
-                                struct xyarray *group_fds);
+                                struct thread_map *threads);
 int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
-                     struct thread_map *threads, bool group,
-                     struct xyarray *group_fds);
+                     struct thread_map *threads);
 void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads);
 
+struct perf_sample;
+
+void *perf_evsel__rawptr(struct perf_evsel *evsel, struct perf_sample *sample,
+                         const char *name);
+u64 perf_evsel__intval(struct perf_evsel *evsel, struct perf_sample *sample,
+                       const char *name);
+
+static inline char *perf_evsel__strval(struct perf_evsel *evsel,
+                                       struct perf_sample *sample,
+                                       const char *name)
+{
+        return perf_evsel__rawptr(evsel, sample, name);
+}
+
+struct format_field;
+
+struct format_field *perf_evsel__field(struct perf_evsel *evsel, const char *name);
+
 #define perf_evsel__match(evsel, t, c)          \
         (evsel->attr.type == PERF_TYPE_##t &&   \
          evsel->attr.config == PERF_COUNT_##c)
 
+static inline bool perf_evsel__match2(struct perf_evsel *e1,
+                                      struct perf_evsel *e2)
+{
+        return (e1->attr.type == e2->attr.type) &&
+               (e1->attr.config == e2->attr.config);
+}
+
 int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
                               int cpu, int thread, bool scale);
 
@@ -181,5 +219,10 @@ static inline int perf_evsel__read_scaled(struct perf_evsel *evsel,
 void hists__init(struct hists *hists);
 
 int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
-                             struct perf_sample *sample, bool swapped);
+                             struct perf_sample *sample);
+
+static inline struct perf_evsel *perf_evsel__next(struct perf_evsel *evsel)
+{
+        return list_entry(evsel->node.next, struct perf_evsel, node);
+}
 #endif /* __PERF_EVSEL_H */
diff --git a/tools/perf/util/generate-cmdlist.sh b/tools/perf/util/generate-cmdlist.sh
index f06f6fd148f8..389590c1ad21 100755
--- a/tools/perf/util/generate-cmdlist.sh
+++ b/tools/perf/util/generate-cmdlist.sh
@@ -21,4 +21,19 @@ do
             p
      }' "Documentation/perf-$cmd.txt"
 done
+
+echo "#ifndef NO_LIBELF_SUPPORT"
+sed -n -e 's/^perf-\([^         ]*\)[   ].* full.*/\1/p' command-list.txt |
+sort |
+while read cmd
+do
+     sed -n '
+     /^NAME/,/perf-'"$cmd"'/H
+     ${
+            x
+            s/.*perf-'"$cmd"' - \(.*\)/  {"'"$cmd"'", "\1"},/
+            p
+     }' "Documentation/perf-$cmd.txt"
+done
+echo "#endif /* NO_LIBELF_SUPPORT */"
 echo "};"
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 74ea3c2f8138..7daad237dea5 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -20,11 +20,14 @@
 #include "symbol.h"
 #include "debug.h"
 #include "cpumap.h"
+#include "pmu.h"
+#include "vdso.h"
+#include "strbuf.h"
 
 static bool no_buildid_cache = false;
 
-static int event_count;
-static struct perf_trace_event_type *events;
+static int trace_event_count;
+static struct perf_trace_event_type *trace_events;
 
 static u32 header_argc;
 static const char **header_argv;
@@ -36,24 +39,24 @@ int perf_header__push_event(u64 id, const char *name)
         if (strlen(name) > MAX_EVENT_NAME)
                 pr_warning("Event %s will be truncated\n", name);
 
-        nevents = realloc(events, (event_count + 1) * sizeof(*events));
+        nevents = realloc(trace_events, (trace_event_count + 1) * sizeof(*trace_events));
         if (nevents == NULL)
                 return -ENOMEM;
-        events = nevents;
+        trace_events = nevents;
 
-        memset(&events[event_count], 0, sizeof(struct perf_trace_event_type));
-        events[event_count].event_id = id;
-        strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1);
-        event_count++;
+        memset(&trace_events[trace_event_count], 0, sizeof(struct perf_trace_event_type));
+        trace_events[trace_event_count].event_id = id;
+        strncpy(trace_events[trace_event_count].name, name, MAX_EVENT_NAME - 1);
+        trace_event_count++;
         return 0;
 }
 
 char *perf_header__find_event(u64 id)
 {
         int i;
-        for (i = 0 ; i < event_count; i++) {
-                if (events[i].event_id == id)
-                        return events[i].name;
+        for (i = 0 ; i < trace_event_count; i++) {
+                if (trace_events[i].event_id == id)
+                        return trace_events[i].name;
         }
         return NULL;
 }
@@ -128,7 +131,7 @@ static int do_write_string(int fd, const char *str)
         int ret;
 
         olen = strlen(str) + 1;
-        len = ALIGN(olen, NAME_ALIGN);
+        len = PERF_ALIGN(olen, NAME_ALIGN);
 
         /* write len, incl. \0 */
         ret = do_write(fd, &len, sizeof(len));
@@ -206,6 +209,29 @@ perf_header__set_cmdline(int argc, const char **argv)
                         continue;               \
                 else
 
+static int write_buildid(char *name, size_t name_len, u8 *build_id,
+                         pid_t pid, u16 misc, int fd)
+{
+        int err;
+        struct build_id_event b;
+        size_t len;
+
+        len = name_len + 1;
+        len = PERF_ALIGN(len, NAME_ALIGN);
+
+        memset(&b, 0, sizeof(b));
+        memcpy(&b.build_id, build_id, BUILD_ID_SIZE);
+        b.pid = pid;
+        b.header.misc = misc;
+        b.header.size = sizeof(b) + len;
+
+        err = do_write(fd, &b, sizeof(b));
+        if (err < 0)
+                return err;
+
+        return write_padded(fd, name, name_len + 1, len);
+}
+
 static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
                                 u16 misc, int fd)
 {
@@ -213,24 +239,23 @@ static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
 
         dsos__for_each_with_build_id(pos, head) {
                 int err;
-                struct build_id_event b;
-                size_t len;
+                char  *name;
+                size_t name_len;
 
                 if (!pos->hit)
                         continue;
-                len = pos->long_name_len + 1;
-                len = ALIGN(len, NAME_ALIGN);
-                memset(&b, 0, sizeof(b));
-                memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));
-                b.pid = pid;
-                b.header.misc = misc;
-                b.header.size = sizeof(b) + len;
-                err = do_write(fd, &b, sizeof(b));
-                if (err < 0)
-                        return err;
-                err = write_padded(fd, pos->long_name,
-                                   pos->long_name_len + 1, len);
-                if (err < 0)
+
+                if (is_vdso_map(pos->short_name)) {
+                        name = (char *) VDSO__MAP_NAME;
+                        name_len = sizeof(VDSO__MAP_NAME) + 1;
+                } else {
+                        name = pos->long_name;
+                        name_len = pos->long_name_len + 1;
+                }
+
+                err = write_buildid(name, name_len, pos->build_id,
+                                    pid, misc, fd);
+                if (err)
                         return err;
         }
 
@@ -276,19 +301,20 @@ static int dsos__write_buildid_table(struct perf_header *header, int fd)
 }
 
 int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
-                          const char *name, bool is_kallsyms)
+                          const char *name, bool is_kallsyms, bool is_vdso)
 {
         const size_t size = PATH_MAX;
         char *realname, *filename = zalloc(size),
              *linkname = zalloc(size), *targetname;
         int len, err = -1;
+        bool slash = is_kallsyms || is_vdso;
 
         if (is_kallsyms) {
                 if (symbol_conf.kptr_restrict) {
                         pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n");
                         return 0;
                 }
-                realname = (char *)name;
+                realname = (char *) name;
         } else
                 realname = realpath(name, NULL);
 
@@ -296,7 +322,8 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
                 goto out_free;
 
         len = scnprintf(filename, size, "%s%s%s",
-                       debugdir, is_kallsyms ? "/" : "", realname);
+                       debugdir, slash ? "/" : "",
+                       is_vdso ? VDSO__MAP_NAME : realname);
         if (mkdir_p(filename, 0755))
                 goto out_free;
 
@@ -332,13 +359,14 @@ out_free:
 
 static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
                                  const char *name, const char *debugdir,
-                                 bool is_kallsyms)
+                                 bool is_kallsyms, bool is_vdso)
 {
         char sbuild_id[BUILD_ID_SIZE * 2 + 1];
 
         build_id__sprintf(build_id, build_id_size, sbuild_id);
 
-        return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms);
+        return build_id_cache__add_s(sbuild_id, debugdir, name,
+                                     is_kallsyms, is_vdso);
 }
 
 int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
@@ -382,9 +410,11 @@ out_free:
 static int dso__cache_build_id(struct dso *dso, const char *debugdir)
 {
         bool is_kallsyms = dso->kernel && dso->long_name[0] != '/';
+        bool is_vdso = is_vdso_map(dso->short_name);
 
         return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id),
-                                     dso->long_name, debugdir, is_kallsyms);
+                                     dso->long_name, debugdir,
+                                     is_kallsyms, is_vdso);
 }
 
 static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
@@ -446,7 +476,7 @@ static bool perf_session__read_build_ids(struct perf_session *session, bool with
         return ret;
 }
 
-static int write_tracing_data(int fd, struct perf_header *h __used,
+static int write_tracing_data(int fd, struct perf_header *h __maybe_unused,
                             struct perf_evlist *evlist)
 {
         return read_tracing_data(fd, &evlist->entries);
@@ -454,7 +484,7 @@ static int write_tracing_data(int fd, struct perf_header *h __used,
 
 
 static int write_build_id(int fd, struct perf_header *h,
-                          struct perf_evlist *evlist __used)
+                          struct perf_evlist *evlist __maybe_unused)
 {
         struct perf_session *session;
         int err;
@@ -475,8 +505,8 @@ static int write_build_id(int fd, struct perf_header *h,
         return 0;
 }
 
-static int write_hostname(int fd, struct perf_header *h __used,
-                          struct perf_evlist *evlist __used)
+static int write_hostname(int fd, struct perf_header *h __maybe_unused,
+                          struct perf_evlist *evlist __maybe_unused)
 {
         struct utsname uts;
         int ret;
@@ -488,8 +518,8 @@ static int write_hostname(int fd, struct perf_header *h __used,
         return do_write_string(fd, uts.nodename);
 }
 
-static int write_osrelease(int fd, struct perf_header *h __used,
-                           struct perf_evlist *evlist __used)
+static int write_osrelease(int fd, struct perf_header *h __maybe_unused,
+                           struct perf_evlist *evlist __maybe_unused)
 {
         struct utsname uts;
         int ret;
@@ -501,8 +531,8 @@ static int write_osrelease(int fd, struct perf_header *h __used,
         return do_write_string(fd, uts.release);
 }
 
-static int write_arch(int fd, struct perf_header *h __used,
-                      struct perf_evlist *evlist __used)
+static int write_arch(int fd, struct perf_header *h __maybe_unused,
+                      struct perf_evlist *evlist __maybe_unused)
 {
         struct utsname uts;
         int ret;
@@ -514,14 +544,14 @@ static int write_arch(int fd, struct perf_header *h __used,
         return do_write_string(fd, uts.machine);
 }
 
-static int write_version(int fd, struct perf_header *h __used,
-                         struct perf_evlist *evlist __used)
+static int write_version(int fd, struct perf_header *h __maybe_unused,
+                         struct perf_evlist *evlist __maybe_unused)
 {
         return do_write_string(fd, perf_version_string);
 }
 
-static int write_cpudesc(int fd, struct perf_header *h __used,
-                       struct perf_evlist *evlist __used)
+static int write_cpudesc(int fd, struct perf_header *h __maybe_unused,
+                       struct perf_evlist *evlist __maybe_unused)
 {
 #ifndef CPUINFO_PROC
 #define CPUINFO_PROC NULL
@@ -579,8 +609,8 @@ done:
         return ret;
 }
 
-static int write_nrcpus(int fd, struct perf_header *h __used,
-                        struct perf_evlist *evlist __used)
+static int write_nrcpus(int fd, struct perf_header *h __maybe_unused,
+                        struct perf_evlist *evlist __maybe_unused)
 {
         long nr;
         u32 nrc, nra;
@@ -605,15 +635,14 @@ static int write_nrcpus(int fd, struct perf_header *h __used,
         return do_write(fd, &nra, sizeof(nra));
 }
 
-static int write_event_desc(int fd, struct perf_header *h __used,
+static int write_event_desc(int fd, struct perf_header *h __maybe_unused,
                             struct perf_evlist *evlist)
 {
-        struct perf_evsel *attr;
-        u32 nre = 0, nri, sz;
+        struct perf_evsel *evsel;
+        u32 nre, nri, sz;
         int ret;
 
-        list_for_each_entry(attr, &evlist->entries, node)
-                nre++;
+        nre = evlist->nr_entries;
 
         /*
          * write number of events
@@ -625,14 +654,14 @@ static int write_event_desc(int fd, struct perf_header *h __used,
         /*
          * size of perf_event_attr struct
          */
-        sz = (u32)sizeof(attr->attr);
+        sz = (u32)sizeof(evsel->attr);
         ret = do_write(fd, &sz, sizeof(sz));
         if (ret < 0)
                 return ret;
 
-        list_for_each_entry(attr, &evlist->entries, node) {
+        list_for_each_entry(evsel, &evlist->entries, node) {
 
-                ret = do_write(fd, &attr->attr, sz);
+                ret = do_write(fd, &evsel->attr, sz);
                 if (ret < 0)
                         return ret;
                 /*
@@ -642,7 +671,7 @@ static int write_event_desc(int fd, struct perf_header *h __used,
                  * copy into an nri to be independent of the
                  * type of ids,
                  */
-                nri = attr->ids;
+                nri = evsel->ids;
                 ret = do_write(fd, &nri, sizeof(nri));
                 if (ret < 0)
                         return ret;
@@ -650,21 +679,21 @@ static int write_event_desc(int fd, struct perf_header *h __used,
                 /*
                  * write event string as passed on cmdline
                  */
-                ret = do_write_string(fd, perf_evsel__name(attr));
+                ret = do_write_string(fd, perf_evsel__name(evsel));
                 if (ret < 0)
                         return ret;
                 /*
                  * write unique ids for this event
                  */
-                ret = do_write(fd, attr->id, attr->ids * sizeof(u64));
+                ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
                 if (ret < 0)
                         return ret;
         }
         return 0;
 }
 
-static int write_cmdline(int fd, struct perf_header *h __used,
-                         struct perf_evlist *evlist __used)
+static int write_cmdline(int fd, struct perf_header *h __maybe_unused,
+                         struct perf_evlist *evlist __maybe_unused)
 {
         char buf[MAXPATHLEN];
         char proc[32];
@@ -832,8 +861,8 @@ static struct cpu_topo *build_cpu_topology(void)
         return tp;
 }
 
-static int write_cpu_topology(int fd, struct perf_header *h __used,
-                          struct perf_evlist *evlist __used)
+static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused,
+                          struct perf_evlist *evlist __maybe_unused)
 {
         struct cpu_topo *tp;
         u32 i;
@@ -868,8 +897,8 @@ done:
 
 
 
-static int write_total_mem(int fd, struct perf_header *h __used,
-                          struct perf_evlist *evlist __used)
+static int write_total_mem(int fd, struct perf_header *h __maybe_unused,
+                          struct perf_evlist *evlist __maybe_unused)
 {
         char *buf = NULL;
         FILE *fp;
@@ -954,8 +983,8 @@ done:
         return ret;
 }
 
-static int write_numa_topology(int fd, struct perf_header *h __used,
-                          struct perf_evlist *evlist __used)
+static int write_numa_topology(int fd, struct perf_header *h __maybe_unused,
+                          struct perf_evlist *evlist __maybe_unused)
 {
         char *buf = NULL;
         size_t len = 0;
@@ -1004,16 +1033,56 @@ done:
 }
 
 /*
+ * File format:
+ *
+ * struct pmu_mappings {
+ *      u32     pmu_num;
+ *      struct pmu_map {
+ *              u32     type;
+ *              char    name[];
+ *      }[pmu_num];
+ * };
+ */
+
+static int write_pmu_mappings(int fd, struct perf_header *h __maybe_unused,
+                              struct perf_evlist *evlist __maybe_unused)
+{
+        struct perf_pmu *pmu = NULL;
+        off_t offset = lseek(fd, 0, SEEK_CUR);
+        __u32 pmu_num = 0;
+
+        /* write real pmu_num later */
+        do_write(fd, &pmu_num, sizeof(pmu_num));
+
+        while ((pmu = perf_pmu__scan(pmu))) {
+                if (!pmu->name)
+                        continue;
+                pmu_num++;
+                do_write(fd, &pmu->type, sizeof(pmu->type));
+                do_write_string(fd, pmu->name);
+        }
+
+        if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) {
+                /* discard all */
+                lseek(fd, offset, SEEK_SET);
+                return -1;
+        }
+
+        return 0;
+}
+
+/*
  * default get_cpuid(): nothing gets recorded
  * actual implementation must be in arch/$(ARCH)/util/header.c
  */
-int __attribute__((weak)) get_cpuid(char *buffer __used, size_t sz __used)
+int __attribute__ ((weak)) get_cpuid(char *buffer __maybe_unused,
+                                     size_t sz __maybe_unused)
 {
         return -1;
 }
 
-static int write_cpuid(int fd, struct perf_header *h __used,
-                       struct perf_evlist *evlist __used)
+static int write_cpuid(int fd, struct perf_header *h __maybe_unused,
+                       struct perf_evlist *evlist __maybe_unused)
 {
         char buffer[64];
         int ret;
@@ -1027,133 +1096,113 @@ write_it:
         return do_write_string(fd, buffer);
 }
 
-static int write_branch_stack(int fd __used, struct perf_header *h __used,
-                       struct perf_evlist *evlist __used)
+static int write_branch_stack(int fd __maybe_unused,
+                              struct perf_header *h __maybe_unused,
+                       struct perf_evlist *evlist __maybe_unused)
 {
         return 0;
 }
 
-static void print_hostname(struct perf_header *ph, int fd, FILE *fp)
+static void print_hostname(struct perf_header *ph, int fd __maybe_unused,
+                           FILE *fp)
 {
-        char *str = do_read_string(fd, ph);
-        fprintf(fp, "# hostname : %s\n", str);
-        free(str);
+        fprintf(fp, "# hostname : %s\n", ph->env.hostname);
 }
 
-static void print_osrelease(struct perf_header *ph, int fd, FILE *fp)
+static void print_osrelease(struct perf_header *ph, int fd __maybe_unused,
+                            FILE *fp)
 {
-        char *str = do_read_string(fd, ph);
-        fprintf(fp, "# os release : %s\n", str);
-        free(str);
+        fprintf(fp, "# os release : %s\n", ph->env.os_release);
 }
 
-static void print_arch(struct perf_header *ph, int fd, FILE *fp)
+static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
 {
-        char *str = do_read_string(fd, ph);
-        fprintf(fp, "# arch : %s\n", str);
-        free(str);
+        fprintf(fp, "# arch : %s\n", ph->env.arch);
 }
 
-static void print_cpudesc(struct perf_header *ph, int fd, FILE *fp)
+static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused,
+                          FILE *fp)
 {
-        char *str = do_read_string(fd, ph);
-        fprintf(fp, "# cpudesc : %s\n", str);
-        free(str);
+        fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc);
 }
 
-static void print_nrcpus(struct perf_header *ph, int fd, FILE *fp)
+static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused,
+                         FILE *fp)
 {
-        ssize_t ret;
-        u32 nr;
-
-        ret = read(fd, &nr, sizeof(nr));
-        if (ret != (ssize_t)sizeof(nr))
-                nr = -1; /* interpreted as error */
-
-        if (ph->needs_swap)
-                nr = bswap_32(nr);
-
-        fprintf(fp, "# nrcpus online : %u\n", nr);
-
-        ret = read(fd, &nr, sizeof(nr));
-        if (ret != (ssize_t)sizeof(nr))
-                nr = -1; /* interpreted as error */
-
-        if (ph->needs_swap)
-                nr = bswap_32(nr);
-
-        fprintf(fp, "# nrcpus avail : %u\n", nr);
+        fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online);
+        fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail);
 }
 
-static void print_version(struct perf_header *ph, int fd, FILE *fp)
+static void print_version(struct perf_header *ph, int fd __maybe_unused,
+                          FILE *fp)
 {
-        char *str = do_read_string(fd, ph);
-        fprintf(fp, "# perf version : %s\n", str);
-        free(str);
+        fprintf(fp, "# perf version : %s\n", ph->env.version);
 }
 
-static void print_cmdline(struct perf_header *ph, int fd, FILE *fp)
+static void print_cmdline(struct perf_header *ph, int fd __maybe_unused,
+                          FILE *fp)
 {
-        ssize_t ret;
+        int nr, i;
         char *str;
-        u32 nr, i;
-
-        ret = read(fd, &nr, sizeof(nr));
-        if (ret != (ssize_t)sizeof(nr))
-                return;
 
-        if (ph->needs_swap)
-                nr = bswap_32(nr);
+        nr = ph->env.nr_cmdline;
+        str = ph->env.cmdline;
 
         fprintf(fp, "# cmdline : ");
 
         for (i = 0; i < nr; i++) {
-                str = do_read_string(fd, ph);
                 fprintf(fp, "%s ", str);
-                free(str);
+                str += strlen(str) + 1;
         }
         fputc('\n', fp);
 }
 
-static void print_cpu_topology(struct perf_header *ph, int fd, FILE *fp)
+static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused,
+                               FILE *fp)
 {
-        ssize_t ret;
-        u32 nr, i;
+        int nr, i;
         char *str;
 
-        ret = read(fd, &nr, sizeof(nr));
-        if (ret != (ssize_t)sizeof(nr))
-                return;
-
-        if (ph->needs_swap)
-                nr = bswap_32(nr);
+        nr = ph->env.nr_sibling_cores;
+        str = ph->env.sibling_cores;
 
         for (i = 0; i < nr; i++) {
-                str = do_read_string(fd, ph);
                 fprintf(fp, "# sibling cores   : %s\n", str);
-                free(str);
+                str += strlen(str) + 1;
         }
 
-        ret = read(fd, &nr, sizeof(nr));
-        if (ret != (ssize_t)sizeof(nr))
-                return;
-
-        if (ph->needs_swap)
-                nr = bswap_32(nr);
+        nr = ph->env.nr_sibling_threads;
+        str = ph->env.sibling_threads;
 
         for (i = 0; i < nr; i++) {
-                str = do_read_string(fd, ph);
                 fprintf(fp, "# sibling threads : %s\n", str);
-                free(str);
+                str += strlen(str) + 1;
         }
 }
 
-static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
+static void free_event_desc(struct perf_evsel *events)
+{
+        struct perf_evsel *evsel;
+
+        if (!events)
+                return;
+
+        for (evsel = events; evsel->attr.size; evsel++) {
+                if (evsel->name)
+                        free(evsel->name);
+                if (evsel->id)
+                        free(evsel->id);
+        }
+
+        free(events);
+}
+
+static struct perf_evsel *
+read_event_desc(struct perf_header *ph, int fd)
 {
-        struct perf_event_attr attr;
-        uint64_t id;
+        struct perf_evsel *evsel, *events = NULL;
+        u64 *id;
         void *buf = NULL;
-        char *str;
         u32 nre, sz, nr, i, j;
         ssize_t ret;
         size_t msz;
@@ -1173,18 +1222,22 @@ static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
         if (ph->needs_swap)
                 sz = bswap_32(sz);
 
-        memset(&attr, 0, sizeof(attr));
-
         /* buffer to hold on file attr struct */
         buf = malloc(sz);
         if (!buf)
                 goto error;
 
-        msz = sizeof(attr);
+        /* the last event terminates with evsel->attr.size == 0: */
+        events = calloc(nre + 1, sizeof(*events));
+        if (!events)
+                goto error;
+
+        msz = sizeof(evsel->attr);
         if (sz < msz)
                 msz = sz;
 
-        for (i = 0 ; i < nre; i++) {
+        for (i = 0, evsel = events; i < nre; evsel++, i++) {
+                evsel->idx = i;
 
                 /*
                  * must read entire on-file attr struct to
@@ -1197,146 +1250,188 @@ static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
                 if (ph->needs_swap)
                         perf_event__attr_swap(buf);
 
-                memcpy(&attr, buf, msz);
+                memcpy(&evsel->attr, buf, msz);
 
                 ret = read(fd, &nr, sizeof(nr));
                 if (ret != (ssize_t)sizeof(nr))
                         goto error;
 
-                if (ph->needs_swap)
+                if (ph->needs_swap) {
                         nr = bswap_32(nr);
+                        evsel->needs_swap = true;
+                }
 
-                str = do_read_string(fd, ph);
-                fprintf(fp, "# event : name = %s, ", str);
-                free(str);
+                evsel->name = do_read_string(fd, ph);
+
+                if (!nr)
+                        continue;
+
+                id = calloc(nr, sizeof(*id));
+                if (!id)
+                        goto error;
+                evsel->ids = nr;
+                evsel->id = id;
+
+                for (j = 0 ; j < nr; j++) {
+                        ret = read(fd, id, sizeof(*id));
+                        if (ret != (ssize_t)sizeof(*id))
+                                goto error;
+                        if (ph->needs_swap)
+                                *id = bswap_64(*id);
+                        id++;
+                }
+        }
+out:
+        if (buf)
+                free(buf);
+        return events;
+error:
+        if (events)
+                free_event_desc(events);
+        events = NULL;
+        goto out;
+}
+
+static void print_event_desc(struct perf_header *ph, int fd, FILE *fp)
+{
+        struct perf_evsel *evsel, *events = read_event_desc(ph, fd);
+        u32 j;
+        u64 *id;
+
+        if (!events) {
+                fprintf(fp, "# event desc: not available or unable to read\n");
+                return;
+        }
+
+        for (evsel = events; evsel->attr.size; evsel++) {
+                fprintf(fp, "# event : name = %s, ", evsel->name);
 
                 fprintf(fp, "type = %d, config = 0x%"PRIx64
                             ", config1 = 0x%"PRIx64", config2 = 0x%"PRIx64,
-                                attr.type,
-                                (u64)attr.config,
-                                (u64)attr.config1,
-                                (u64)attr.config2);
+                                evsel->attr.type,
+                                (u64)evsel->attr.config,
+                                (u64)evsel->attr.config1,
+                                (u64)evsel->attr.config2);
 
                 fprintf(fp, ", excl_usr = %d, excl_kern = %d",
-                                attr.exclude_user,
-                                attr.exclude_kernel);
+                                evsel->attr.exclude_user,
+                                evsel->attr.exclude_kernel);
 
                 fprintf(fp, ", excl_host = %d, excl_guest = %d",
-                                attr.exclude_host,
-                                attr.exclude_guest);
+                                evsel->attr.exclude_host,
+                                evsel->attr.exclude_guest);
 
-                fprintf(fp, ", precise_ip = %d", attr.precise_ip);
+                fprintf(fp, ", precise_ip = %d", evsel->attr.precise_ip);
 
-                if (nr)
+                if (evsel->ids) {
                         fprintf(fp, ", id = {");
-
-                for (j = 0 ; j < nr; j++) {
-                        ret = read(fd, &id, sizeof(id));
-                        if (ret != (ssize_t)sizeof(id))
-                                goto error;
-
-                        if (ph->needs_swap)
-                                id = bswap_64(id);
-
-                        if (j)
-                                fputc(',', fp);
-
-                        fprintf(fp, " %"PRIu64, id);
-                }
-                if (nr && j == nr)
+                        for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) {
+                                if (j)
+                                        fputc(',', fp);
+                                fprintf(fp, " %"PRIu64, *id);
+                        }
                         fprintf(fp, " }");
+                }
+
                 fputc('\n', fp);
         }
-        free(buf);
-        return;
-error:
-        fprintf(fp, "# event desc: not available or unable to read\n");
+
+        free_event_desc(events);
 }
 
-static void print_total_mem(struct perf_header *h __used, int fd, FILE *fp)
+static void print_total_mem(struct perf_header *ph, int fd __maybe_unused,
+                            FILE *fp)
 {
-        uint64_t mem;
-        ssize_t ret;
-
-        ret = read(fd, &mem, sizeof(mem));
-        if (ret != sizeof(mem))
-                goto error;
-
-        if (h->needs_swap)
-                mem = bswap_64(mem);
-
-        fprintf(fp, "# total memory : %"PRIu64" kB\n", mem);
-        return;
-error:
-        fprintf(fp, "# total memory : unknown\n");
+        fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem);
 }
 
-static void print_numa_topology(struct perf_header *h __used, int fd, FILE *fp)
+static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused,
+                                FILE *fp)
 {
-        ssize_t ret;
         u32 nr, c, i;
-        char *str;
+        char *str, *tmp;
         uint64_t mem_total, mem_free;
 
         /* nr nodes */
-        ret = read(fd, &nr, sizeof(nr));
-        if (ret != (ssize_t)sizeof(nr))
-                goto error;
-
-        if (h->needs_swap)
-                nr = bswap_32(nr);
+        nr = ph->env.nr_numa_nodes;
+        str = ph->env.numa_nodes;
 
         for (i = 0; i < nr; i++) {
-
                 /* node number */
-                ret = read(fd, &c, sizeof(c));
-                if (ret != (ssize_t)sizeof(c))
+                c = strtoul(str, &tmp, 0);
+                if (*tmp != ':')
                         goto error;
 
-                if (h->needs_swap)
-                        c = bswap_32(c);
-
-                ret = read(fd, &mem_total, sizeof(u64));
-                if (ret != sizeof(u64))
+                str = tmp + 1;
+                mem_total = strtoull(str, &tmp, 0);
+                if (*tmp != ':')
                         goto error;
 
-                ret = read(fd, &mem_free, sizeof(u64));
-                if (ret != sizeof(u64))
+                str = tmp + 1;
+                mem_free = strtoull(str, &tmp, 0);
+                if (*tmp != ':')
                         goto error;
 
-                if (h->needs_swap) {
-                        mem_total = bswap_64(mem_total);
-                        mem_free = bswap_64(mem_free);
-                }
-
                 fprintf(fp, "# node%u meminfo  : total = %"PRIu64" kB,"
                             " free = %"PRIu64" kB\n",
-                        c,
-                        mem_total,
-                        mem_free);
+                        c, mem_total, mem_free);
 
-                str = do_read_string(fd, h);
+                str = tmp + 1;
                 fprintf(fp, "# node%u cpu list : %s\n", c, str);
-                free(str);
         }
         return;
 error:
         fprintf(fp, "# numa topology : not available\n");
 }
 
-static void print_cpuid(struct perf_header *ph, int fd, FILE *fp)
+static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp)
 {
-        char *str = do_read_string(fd, ph);
-        fprintf(fp, "# cpuid : %s\n", str);
-        free(str);
+        fprintf(fp, "# cpuid : %s\n", ph->env.cpuid);
 }
 
-static void print_branch_stack(struct perf_header *ph __used, int fd __used,
-                               FILE *fp)
+static void print_branch_stack(struct perf_header *ph __maybe_unused,
+                               int fd __maybe_unused, FILE *fp)
 {
         fprintf(fp, "# contains samples with branch stack\n");
 }
 
+static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused,
+                               FILE *fp)
+{
+        const char *delimiter = "# pmu mappings: ";
+        char *str, *tmp;
+        u32 pmu_num;
+        u32 type;
+
+        pmu_num = ph->env.nr_pmu_mappings;
+        if (!pmu_num) {
+                fprintf(fp, "# pmu mappings: not available\n");
+                return;
+        }
+
+        str = ph->env.pmu_mappings;
+
+        while (pmu_num) {
+                type = strtoul(str, &tmp, 0);
+                if (*tmp != ':')
+                        goto error;
+
+                str = tmp + 1;
+                fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type);
+
+                delimiter = ", ";
+                str += strlen(str) + 1;
+                pmu_num--;
+        }
+
+        fprintf(fp, "\n");
+
+        if (!pmu_num)
+                return;
+error:
+        fprintf(fp, "# pmu mappings: unable to read\n");
+}
+
 static int __event_process_build_id(struct build_id_event *bev,
                                     char *filename,
                                     struct perf_session *session)
@@ -1398,7 +1493,7 @@ static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
         struct perf_session *session = container_of(header, struct perf_session, header);
         struct {
                 struct perf_event_header   header;
-                u8                         build_id[ALIGN(BUILD_ID_SIZE, sizeof(u64))];
+                u8                         build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))];
                 char                       filename[0];
         } old_bev;
         struct build_id_event bev;
@@ -1487,28 +1582,375 @@ out:
         return err;
 }
 
-static int process_tracing_data(struct perf_file_section *section __unused,
-                              struct perf_header *ph __unused,
-                              int feat __unused, int fd, void *data)
+static int process_tracing_data(struct perf_file_section *section __maybe_unused,
+                                struct perf_header *ph __maybe_unused,
+                                int fd, void *data)
 {
         trace_report(fd, data, false);
         return 0;
 }
 
 static int process_build_id(struct perf_file_section *section,
-                            struct perf_header *ph,
-                            int feat __unused, int fd, void *data __used)
+                            struct perf_header *ph, int fd,
+                            void *data __maybe_unused)
 {
         if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
                 pr_debug("Failed to read buildids, continuing...\n");
         return 0;
 }
 
+static int process_hostname(struct perf_file_section *section __maybe_unused,
+                            struct perf_header *ph, int fd,
+                            void *data __maybe_unused)
+{
+        ph->env.hostname = do_read_string(fd, ph);
+        return ph->env.hostname ? 0 : -ENOMEM;
+}
+
+static int process_osrelease(struct perf_file_section *section __maybe_unused,
+                             struct perf_header *ph, int fd,
+                             void *data __maybe_unused)
+{
+        ph->env.os_release = do_read_string(fd, ph);
+        return ph->env.os_release ? 0 : -ENOMEM;
+}
+
+static int process_version(struct perf_file_section *section __maybe_unused,
+                           struct perf_header *ph, int fd,
+                           void *data __maybe_unused)
+{
+        ph->env.version = do_read_string(fd, ph);
+        return ph->env.version ? 0 : -ENOMEM;
+}
+
+static int process_arch(struct perf_file_section *section __maybe_unused,
+                        struct perf_header *ph, int fd,
+                        void *data __maybe_unused)
+{
+        ph->env.arch = do_read_string(fd, ph);
+        return ph->env.arch ? 0 : -ENOMEM;
+}
+
+static int process_nrcpus(struct perf_file_section *section __maybe_unused,
+                          struct perf_header *ph, int fd,
+                          void *data __maybe_unused)
+{
+        size_t ret;
+        u32 nr;
+
+        ret = read(fd, &nr, sizeof(nr));
+        if (ret != sizeof(nr))
+                return -1;
+
+        if (ph->needs_swap)
+                nr = bswap_32(nr);
+
+        ph->env.nr_cpus_online = nr;
+
+        ret = read(fd, &nr, sizeof(nr));
+        if (ret != sizeof(nr))
+                return -1;
+
+        if (ph->needs_swap)
+                nr = bswap_32(nr);
+
+        ph->env.nr_cpus_avail = nr;
+        return 0;
+}
+
+static int process_cpudesc(struct perf_file_section *section __maybe_unused,
+                           struct perf_header *ph, int fd,
+                           void *data __maybe_unused)
+{
+        ph->env.cpu_desc = do_read_string(fd, ph);
+        return ph->env.cpu_desc ? 0 : -ENOMEM;
+}
+
+static int process_cpuid(struct perf_file_section *section __maybe_unused,
+                         struct perf_header *ph,  int fd,
+                         void *data __maybe_unused)
+{
+        ph->env.cpuid = do_read_string(fd, ph);
+        return ph->env.cpuid ? 0 : -ENOMEM;
+}
+
+static int process_total_mem(struct perf_file_section *section __maybe_unused,
+                             struct perf_header *ph, int fd,
+                             void *data __maybe_unused)
+{
+        uint64_t mem;
+        size_t ret;
+
+        ret = read(fd, &mem, sizeof(mem));
+        if (ret != sizeof(mem))
+                return -1;
+
+        if (ph->needs_swap)
+                mem = bswap_64(mem);
+
+        ph->env.total_mem = mem;
+        return 0;
+}
+
+static struct perf_evsel *
+perf_evlist__find_by_index(struct perf_evlist *evlist, int idx)
+{
+        struct perf_evsel *evsel;
+
+        list_for_each_entry(evsel, &evlist->entries, node) {
+                if (evsel->idx == idx)
+                        return evsel;
+        }
+
+        return NULL;
+}
+
+static void
+perf_evlist__set_event_name(struct perf_evlist *evlist,
+                            struct perf_evsel *event)
+{
+        struct perf_evsel *evsel;
+
+        if (!event->name)
+                return;
+
+        evsel = perf_evlist__find_by_index(evlist, event->idx);
+        if (!evsel)
+                return;
+
+        if (evsel->name)
+                return;
+
+        evsel->name = strdup(event->name);
+}
+
+static int
+process_event_desc(struct perf_file_section *section __maybe_unused,
+                   struct perf_header *header, int fd,
+                   void *data __maybe_unused)
+{
+        struct perf_session *session;
+        struct perf_evsel *evsel, *events = read_event_desc(header, fd);
+
+        if (!events)
+                return 0;
+
+        session = container_of(header, struct perf_session, header);
+        for (evsel = events; evsel->attr.size; evsel++)
+                perf_evlist__set_event_name(session->evlist, evsel);
+
+        free_event_desc(events);
+
+        return 0;
+}
+
+static int process_cmdline(struct perf_file_section *section __maybe_unused,
+                           struct perf_header *ph, int fd,
+                           void *data __maybe_unused)
+{
+        size_t ret;
+        char *str;
+        u32 nr, i;
+        struct strbuf sb;
+
+        ret = read(fd, &nr, sizeof(nr));
+        if (ret != sizeof(nr))
+                return -1;
+
+        if (ph->needs_swap)
+                nr = bswap_32(nr);
+
+        ph->env.nr_cmdline = nr;
+        strbuf_init(&sb, 128);
+
+        for (i = 0; i < nr; i++) {
+                str = do_read_string(fd, ph);
+                if (!str)
+                        goto error;
+
+                /* include a NULL character at the end */
+                strbuf_add(&sb, str, strlen(str) + 1);
+                free(str);
+        }
+        ph->env.cmdline = strbuf_detach(&sb, NULL);
+        return 0;
+
+error:
+        strbuf_release(&sb);
+        return -1;
+}
+
+static int process_cpu_topology(struct perf_file_section *section __maybe_unused,
+                                struct perf_header *ph, int fd,
+                                void *data __maybe_unused)
+{
+        size_t ret;
+        u32 nr, i;
+        char *str;
+        struct strbuf sb;
+
+        ret = read(fd, &nr, sizeof(nr));
+        if (ret != sizeof(nr))
+                return -1;
+
+        if (ph->needs_swap)
+                nr = bswap_32(nr);
+
+        ph->env.nr_sibling_cores = nr;
+        strbuf_init(&sb, 128);
+
+        for (i = 0; i < nr; i++) {
+                str = do_read_string(fd, ph);
+                if (!str)
+                        goto error;
+
+                /* include a NULL character at the end */
+                strbuf_add(&sb, str, strlen(str) + 1);
+                free(str);
+        }
+        ph->env.sibling_cores = strbuf_detach(&sb, NULL);
+
+        ret = read(fd, &nr, sizeof(nr));
+        if (ret != sizeof(nr))
+                return -1;
+
+        if (ph->needs_swap)
+                nr = bswap_32(nr);
+
+        ph->env.nr_sibling_threads = nr;
+
+        for (i = 0; i < nr; i++) {
+                str = do_read_string(fd, ph);
+                if (!str)
+                        goto error;
+
+                /* include a NULL character at the end */
+                strbuf_add(&sb, str, strlen(str) + 1);
+                free(str);
+        }
+        ph->env.sibling_threads = strbuf_detach(&sb, NULL);
+        return 0;
+
+error:
+        strbuf_release(&sb);
+        return -1;
+}
+
+static int process_numa_topology(struct perf_file_section *section __maybe_unused,
+                                 struct perf_header *ph, int fd,
+                                 void *data __maybe_unused)
+{
+        size_t ret;
+        u32 nr, node, i;
+        char *str;
+        uint64_t mem_total, mem_free;
+        struct strbuf sb;
+
+        /* nr nodes */
+        ret = read(fd, &nr, sizeof(nr));
+        if (ret != sizeof(nr))
+                goto error;
+
+        if (ph->needs_swap)
+                nr = bswap_32(nr);
+
+        ph->env.nr_numa_nodes = nr;
+        strbuf_init(&sb, 256);
+
+        for (i = 0; i < nr; i++) {
+                /* node number */
+                ret = read(fd, &node, sizeof(node));
+                if (ret != sizeof(node))
+                        goto error;
+
+                ret = read(fd, &mem_total, sizeof(u64));
+                if (ret != sizeof(u64))
+                        goto error;
+
+                ret = read(fd, &mem_free, sizeof(u64));
+                if (ret != sizeof(u64))
+                        goto error;
+
+                if (ph->needs_swap) {
+                        node = bswap_32(node);
+                        mem_total = bswap_64(mem_total);
+                        mem_free = bswap_64(mem_free);
+                }
+
+                strbuf_addf(&sb, "%u:%"PRIu64":%"PRIu64":",
+                            node, mem_total, mem_free);
+
+                str = do_read_string(fd, ph);
+                if (!str)
+                        goto error;
+
+                /* include a NULL character at the end */
+                strbuf_add(&sb, str, strlen(str) + 1);
+                free(str);
+        }
+        ph->env.numa_nodes = strbuf_detach(&sb, NULL);
+        return 0;
+
+error:
+        strbuf_release(&sb);
+        return -1;
+}
+
+static int process_pmu_mappings(struct perf_file_section *section __maybe_unused,
+                                struct perf_header *ph, int fd,
+                                void *data __maybe_unused)
+{
+        size_t ret;
+        char *name;
+        u32 pmu_num;
+        u32 type;
+        struct strbuf sb;
+
+        ret = read(fd, &pmu_num, sizeof(pmu_num));
+        if (ret != sizeof(pmu_num))
+                return -1;
+
+        if (ph->needs_swap)
+                pmu_num = bswap_32(pmu_num);
+
+        if (!pmu_num) {
+                pr_debug("pmu mappings not available\n");
+                return 0;
+        }
+
+        ph->env.nr_pmu_mappings = pmu_num;
+        strbuf_init(&sb, 128);
+
+        while (pmu_num) {
+                if (read(fd, &type, sizeof(type)) != sizeof(type))
+                        goto error;
+                if (ph->needs_swap)
+                        type = bswap_32(type);
+
+                name = do_read_string(fd, ph);
+                if (!name)
+                        goto error;
+
+                strbuf_addf(&sb, "%u:%s", type, name);
+                /* include a NULL character at the end */
+                strbuf_add(&sb, "", 1);
+
+                free(name);
+                pmu_num--;
+        }
+        ph->env.pmu_mappings = strbuf_detach(&sb, NULL);
+        return 0;
+
+error:
+        strbuf_release(&sb);
+        return -1;
+}
+
 struct feature_ops {
         int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
         void (*print)(struct perf_header *h, int fd, FILE *fp);
         int (*process)(struct perf_file_section *section,
-                       struct perf_header *h, int feat, int fd, void *data);
+                       struct perf_header *h, int fd, void *data);
         const char *name;
         bool full_only;
 };
@@ -1520,7 +1962,7 @@ struct feature_ops {
                 .process = process_##func }
 #define FEAT_OPF(n, func) \
         [n] = { .name = #n, .write = write_##func, .print = print_##func, \
-                .full_only = true }
+                .process = process_##func, .full_only = true }
 
 /* feature_ops not implemented: */
 #define print_tracing_data      NULL
@@ -1529,19 +1971,20 @@ struct feature_ops {
 static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
         FEAT_OPP(HEADER_TRACING_DATA,   tracing_data),
         FEAT_OPP(HEADER_BUILD_ID,       build_id),
-        FEAT_OPA(HEADER_HOSTNAME,       hostname),
-        FEAT_OPA(HEADER_OSRELEASE,      osrelease),
-        FEAT_OPA(HEADER_VERSION,        version),
-        FEAT_OPA(HEADER_ARCH,           arch),
-        FEAT_OPA(HEADER_NRCPUS,         nrcpus),
-        FEAT_OPA(HEADER_CPUDESC,        cpudesc),
-        FEAT_OPA(HEADER_CPUID,          cpuid),
-        FEAT_OPA(HEADER_TOTAL_MEM,      total_mem),
-        FEAT_OPA(HEADER_EVENT_DESC,     event_desc),
-        FEAT_OPA(HEADER_CMDLINE,        cmdline),
+        FEAT_OPP(HEADER_HOSTNAME,       hostname),
+        FEAT_OPP(HEADER_OSRELEASE,      osrelease),
+        FEAT_OPP(HEADER_VERSION,        version),
+        FEAT_OPP(HEADER_ARCH,           arch),
+        FEAT_OPP(HEADER_NRCPUS,         nrcpus),
+        FEAT_OPP(HEADER_CPUDESC,        cpudesc),
+        FEAT_OPP(HEADER_CPUID,          cpuid),
+        FEAT_OPP(HEADER_TOTAL_MEM,      total_mem),
+        FEAT_OPP(HEADER_EVENT_DESC,     event_desc),
+        FEAT_OPP(HEADER_CMDLINE,        cmdline),
         FEAT_OPF(HEADER_CPU_TOPOLOGY,   cpu_topology),
         FEAT_OPF(HEADER_NUMA_TOPOLOGY,  numa_topology),
         FEAT_OPA(HEADER_BRANCH_STACK,   branch_stack),
+        FEAT_OPP(HEADER_PMU_MAPPINGS,   pmu_mappings),
 };
 
 struct header_print_data {
@@ -1683,17 +2126,17 @@ int perf_session__write_header(struct perf_session *session,
         struct perf_file_header f_header;
         struct perf_file_attr   f_attr;
         struct perf_header *header = &session->header;
-        struct perf_evsel *attr, *pair = NULL;
+        struct perf_evsel *evsel, *pair = NULL;
         int err;
 
         lseek(fd, sizeof(f_header), SEEK_SET);
 
         if (session->evlist != evlist)
-                pair = list_entry(session->evlist->entries.next, struct perf_evsel, node);
+                pair = perf_evlist__first(session->evlist);
 
-        list_for_each_entry(attr, &evlist->entries, node) {
-                attr->id_offset = lseek(fd, 0, SEEK_CUR);
-                err = do_write(fd, attr->id, attr->ids * sizeof(u64));
+        list_for_each_entry(evsel, &evlist->entries, node) {
+                evsel->id_offset = lseek(fd, 0, SEEK_CUR);
+                err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
                 if (err < 0) {
 out_err_write:
                         pr_debug("failed to write perf header\n");
@@ -1703,19 +2146,19 @@ out_err_write:
                         err = do_write(fd, pair->id, pair->ids * sizeof(u64));
                         if (err < 0)
                                 goto out_err_write;
-                        attr->ids += pair->ids;
-                        pair = list_entry(pair->node.next, struct perf_evsel, node);
+                        evsel->ids += pair->ids;
+                        pair = perf_evsel__next(pair);
                 }
         }
 
         header->attr_offset = lseek(fd, 0, SEEK_CUR);
 
-        list_for_each_entry(attr, &evlist->entries, node) {
+        list_for_each_entry(evsel, &evlist->entries, node) {
                 f_attr = (struct perf_file_attr){
-                        .attr = attr->attr,
+                        .attr = evsel->attr,
                         .ids  = {
-                                .offset = attr->id_offset,
-                                .size   = attr->ids * sizeof(u64),
+                                .offset = evsel->id_offset,
+                                .size   = evsel->ids * sizeof(u64),
                         }
                 };
                 err = do_write(fd, &f_attr, sizeof(f_attr));
@@ -1726,9 +2169,9 @@ out_err_write:
         }
 
         header->event_offset = lseek(fd, 0, SEEK_CUR);
-        header->event_size = event_count * sizeof(struct perf_trace_event_type);
-        if (events) {
-                err = do_write(fd, events, header->event_size);
+        header->event_size = trace_event_count * sizeof(struct perf_trace_event_type);
+        if (trace_events) {
+                err = do_write(fd, trace_events, header->event_size);
                 if (err < 0) {
                         pr_debug("failed to write perf header events\n");
                         return err;
@@ -1829,6 +2272,8 @@ out_free:
 static const int attr_file_abi_sizes[] = {
         [0] = PERF_ATTR_SIZE_VER0,
         [1] = PERF_ATTR_SIZE_VER1,
+        [2] = PERF_ATTR_SIZE_VER2,
+        [3] = PERF_ATTR_SIZE_VER3,
         0,
 };
 
@@ -2019,7 +2464,7 @@ static int perf_file_section__process(struct perf_file_section *section,
         if (!feat_ops[feat].process)
                 return 0;
 
-        return feat_ops[feat].process(section, ph, feat, fd, data);
+        return feat_ops[feat].process(section, ph, fd, data);
 }
 
 static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
@@ -2108,32 +2553,39 @@ static int read_attr(int fd, struct perf_header *ph,
         return ret <= 0 ? -1 : 0;
 }
 
-static int perf_evsel__set_tracepoint_name(struct perf_evsel *evsel,
-                                           struct pevent *pevent)
+static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel,
+                                                struct pevent *pevent)
 {
-        struct event_format *event = pevent_find_event(pevent,
-                                                       evsel->attr.config);
+        struct event_format *event;
         char bf[128];
 
+        /* already prepared */
+        if (evsel->tp_format)
+                return 0;
+
+        event = pevent_find_event(pevent, evsel->attr.config);
         if (event == NULL)
                 return -1;
 
-        snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
-        evsel->name = strdup(bf);
-        if (event->name == NULL)
-                return -1;
+        if (!evsel->name) {
+                snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name);
+                evsel->name = strdup(bf);
+                if (evsel->name == NULL)
+                        return -1;
+        }
 
+        evsel->tp_format = event;
         return 0;
 }
 
-static int perf_evlist__set_tracepoint_names(struct perf_evlist *evlist,
-                                             struct pevent *pevent)
+static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist,
+                                                  struct pevent *pevent)
 {
         struct perf_evsel *pos;
 
         list_for_each_entry(pos, &evlist->entries, node) {
                 if (pos->attr.type == PERF_TYPE_TRACEPOINT &&
-                    perf_evsel__set_tracepoint_name(pos, pevent))
+                    perf_evsel__prepare_tracepoint_event(pos, pevent))
                         return -1;
         }
 
@@ -2176,6 +2628,8 @@ int perf_session__read_header(struct perf_session *session, int fd)
 
                 if (evsel == NULL)
                         goto out_delete_evlist;
+
+                evsel->needs_swap = header->needs_swap;
                 /*
                  * Do it before so that if perf_evsel__alloc_id fails, this
                  * entry gets purged too at perf_evlist__delete().
@@ -2207,13 +2661,13 @@ int perf_session__read_header(struct perf_session *session, int fd)
 
         if (f_header.event_types.size) {
                 lseek(fd, f_header.event_types.offset, SEEK_SET);
-                events = malloc(f_header.event_types.size);
-                if (events == NULL)
+                trace_events = malloc(f_header.event_types.size);
+                if (trace_events == NULL)
                         return -ENOMEM;
-                if (perf_header__getbuffer64(header, fd, events,
+                if (perf_header__getbuffer64(header, fd, trace_events,
                                              f_header.event_types.size))
                         goto out_errno;
-                event_count =  f_header.event_types.size / sizeof(struct perf_trace_event_type);
+                trace_event_count =  f_header.event_types.size / sizeof(struct perf_trace_event_type);
         }
 
         perf_header__process_sections(header, fd, &session->pevent,
@@ -2221,7 +2675,8 @@ int perf_session__read_header(struct perf_session *session, int fd)
 
         lseek(fd, header->data_offset, SEEK_SET);
 
-        if (perf_evlist__set_tracepoint_names(session->evlist, session->pevent))
+        if (perf_evlist__prepare_tracepoint_events(session->evlist,
+                                                   session->pevent))
                 goto out_delete_evlist;
 
         header->frozen = 1;
@@ -2236,7 +2691,7 @@ out_delete_evlist:
 }
 
 int perf_event__synthesize_attr(struct perf_tool *tool,
-                                struct perf_event_attr *attr, u16 ids, u64 *id,
+                                struct perf_event_attr *attr, u32 ids, u64 *id,
                                 perf_event__handler_t process)
 {
         union perf_event *ev;
@@ -2244,7 +2699,7 @@ int perf_event__synthesize_attr(struct perf_tool *tool,
         int err;
 
         size = sizeof(struct perf_event_attr);
-        size = ALIGN(size, sizeof(u64));
+        size = PERF_ALIGN(size, sizeof(u64));
         size += sizeof(struct perf_event_header);
         size += ids * sizeof(u64);
 
@@ -2257,9 +2712,12 @@ int perf_event__synthesize_attr(struct perf_tool *tool,
         memcpy(ev->attr.id, id, ids * sizeof(u64));
 
         ev->attr.header.type = PERF_RECORD_HEADER_ATTR;
-        ev->attr.header.size = size;
+        ev->attr.header.size = (u16)size;
 
-        err = process(tool, ev, NULL, NULL);
+        if (ev->attr.header.size == size)
+                err = process(tool, ev, NULL, NULL);
+        else
+                err = -E2BIG;
 
         free(ev);
 
@@ -2270,12 +2728,12 @@ int perf_event__synthesize_attrs(struct perf_tool *tool,
                                    struct perf_session *session,
                                    perf_event__handler_t process)
 {
-        struct perf_evsel *attr;
+        struct perf_evsel *evsel;
         int err = 0;
 
-        list_for_each_entry(attr, &session->evlist->entries, node) {
-                err = perf_event__synthesize_attr(tool, &attr->attr, attr->ids,
-                                                  attr->id, process);
+        list_for_each_entry(evsel, &session->evlist->entries, node) {
+                err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids,
+                                                  evsel->id, process);
                 if (err) {
                         pr_debug("failed to create perf header attribute\n");
                         return err;
@@ -2288,7 +2746,7 @@ int perf_event__synthesize_attrs(struct perf_tool *tool,
 int perf_event__process_attr(union perf_event *event,
                              struct perf_evlist **pevlist)
 {
-        unsigned int i, ids, n_ids;
+        u32 i, ids, n_ids;
         struct perf_evsel *evsel;
         struct perf_evlist *evlist = *pevlist;
 
@@ -2339,7 +2797,7 @@ int perf_event__synthesize_event_type(struct perf_tool *tool,
 
         ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE;
         size = strlen(ev.event_type.event_type.name);
-        size = ALIGN(size, sizeof(u64));
+        size = PERF_ALIGN(size, sizeof(u64));
         ev.event_type.header.size = sizeof(ev.event_type) -
                 (sizeof(ev.event_type.event_type.name) - size);
 
@@ -2355,8 +2813,8 @@ int perf_event__synthesize_event_types(struct perf_tool *tool,
         struct perf_trace_event_type *type;
         int i, err = 0;
 
-        for (i = 0; i < event_count; i++) {
-                type = &events[i];
+        for (i = 0; i < trace_event_count; i++) {
+                type = &trace_events[i];
 
                 err = perf_event__synthesize_event_type(tool, type->event_id,
                                                         type->name, process,
@@ -2370,7 +2828,7 @@ int perf_event__synthesize_event_types(struct perf_tool *tool,
         return err;
 }
 
-int perf_event__process_event_type(struct perf_tool *tool __unused,
+int perf_event__process_event_type(struct perf_tool *tool __maybe_unused,
                                    union perf_event *event)
 {
         if (perf_header__push_event(event->event_type.event_type.event_id,
@@ -2387,7 +2845,7 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
         union perf_event ev;
         struct tracing_data *tdata;
         ssize_t size = 0, aligned_size = 0, padding;
-        int err __used = 0;
+        int err __maybe_unused = 0;
 
         /*
          * We are going to store the size of the data followed
@@ -2408,7 +2866,7 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd,
 
         ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
         size = tdata->size;
-        aligned_size = ALIGN(size, sizeof(u64));
+        aligned_size = PERF_ALIGN(size, sizeof(u64));
         padding = aligned_size - size;
         ev.tracing_data.header.size = sizeof(ev.tracing_data);
         ev.tracing_data.size = aligned_size;
@@ -2439,7 +2897,7 @@ int perf_event__process_tracing_data(union perf_event *event,
 
         size_read = trace_report(session->fd, &session->pevent,
                                  session->repipe);
-        padding = ALIGN(size_read, sizeof(u64)) - size_read;
+        padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read;
 
         if (read(session->fd, buf, padding) < 0)
                 die("reading input file");
@@ -2452,6 +2910,9 @@ int perf_event__process_tracing_data(union perf_event *event,
         if (size_read + padding != size)
                 die("tracing data size mismatch");
 
+        perf_evlist__prepare_tracepoint_events(session->evlist,
+                                               session->pevent);
+
         return size_read + padding;
 }
 
@@ -2470,7 +2931,7 @@ int perf_event__synthesize_build_id(struct perf_tool *tool,
         memset(&ev, 0, sizeof(ev));
 
         len = pos->long_name_len + 1;
-        len = ALIGN(len, NAME_ALIGN);
+        len = PERF_ALIGN(len, NAME_ALIGN);
         memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id));
         ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID;
         ev.build_id.header.misc = misc;
@@ -2483,7 +2944,7 @@ int perf_event__synthesize_build_id(struct perf_tool *tool,
         return err;
 }
 
-int perf_event__process_build_id(struct perf_tool *tool __used,
+int perf_event__process_build_id(struct perf_tool *tool __maybe_unused,
                                  union perf_event *event,
                                  struct perf_session *session)
 {
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 2d42b3e1826f..99bdd3abce59 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -28,6 +28,7 @@ enum {
         HEADER_CPU_TOPOLOGY,
         HEADER_NUMA_TOPOLOGY,
         HEADER_BRANCH_STACK,
+        HEADER_PMU_MAPPINGS,
         HEADER_LAST_FEATURE,
         HEADER_FEAT_BITS        = 256,
 };
@@ -57,6 +58,29 @@ struct perf_header;
 int perf_file_header__read(struct perf_file_header *header,
                            struct perf_header *ph, int fd);
 
+struct perf_session_env {
+        char                    *hostname;
+        char                    *os_release;
+        char                    *version;
+        char                    *arch;
+        int                     nr_cpus_online;
+        int                     nr_cpus_avail;
+        char                    *cpu_desc;
+        char                    *cpuid;
+        unsigned long long      total_mem;
+
+        int                     nr_cmdline;
+        char                    *cmdline;
+        int                     nr_sibling_cores;
+        char                    *sibling_cores;
+        int                     nr_sibling_threads;
+        char                    *sibling_threads;
+        int                     nr_numa_nodes;
+        char                    *numa_nodes;
+        int                     nr_pmu_mappings;
+        char                    *pmu_mappings;
+};
+
 struct perf_header {
         int                     frozen;
         bool                    needs_swap;
@@ -66,6 +90,7 @@ struct perf_header {
         u64                     event_offset;
         u64                     event_size;
         DECLARE_BITMAP(adds_features, HEADER_FEAT_BITS);
+        struct perf_session_env env;
 };
 
 struct perf_evlist;
@@ -95,11 +120,11 @@ int perf_header__process_sections(struct perf_header *header, int fd,
 int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full);
 
 int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
-                          const char *name, bool is_kallsyms);
+                          const char *name, bool is_kallsyms, bool is_vdso);
 int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir);
 
 int perf_event__synthesize_attr(struct perf_tool *tool,
-                                struct perf_event_attr *attr, u16 ids, u64 *id,
+                                struct perf_event_attr *attr, u32 ids, u64 *id,
                                 perf_event__handler_t process);
 int perf_event__synthesize_attrs(struct perf_tool *tool,
                                  struct perf_session *session,
diff --git a/tools/perf/util/help.c b/tools/perf/util/help.c
index 6f2975a00358..8b1f6e891b8a 100644
--- a/tools/perf/util/help.c
+++ b/tools/perf/util/help.c
@@ -3,6 +3,7 @@
 #include "exec_cmd.h"
 #include "levenshtein.h"
 #include "help.h"
+#include <termios.h>
 
 void add_cmdname(struct cmdnames *cmds, const char *name, size_t len)
 {
@@ -331,7 +332,8 @@ const char *help_unknown_cmd(const char *cmd)
         exit(1);
 }
 
-int cmd_version(int argc __used, const char **argv __used, const char *prefix __used)
+int cmd_version(int argc __maybe_unused, const char **argv __maybe_unused,
+                const char *prefix __maybe_unused)
 {
         printf("perf version %s\n", perf_version_string);
         return 0;
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index f247ef2789a4..236bc9d98ff2 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -45,7 +45,7 @@ bool hists__new_col_len(struct hists *hists, enum hist_column col, u16 len)
         return false;
 }
 
-static void hists__reset_col_len(struct hists *hists)
+void hists__reset_col_len(struct hists *hists)
 {
         enum hist_column col;
 
@@ -63,7 +63,7 @@ static void hists__set_unres_dso_col_len(struct hists *hists, int dso)
                 hists__set_col_len(hists, dso, unresolved_col_width);
 }
 
-static void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
+void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
 {
         const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
         u16 len;
@@ -114,6 +114,22 @@ static void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
         }
 }
 
+void hists__output_recalc_col_len(struct hists *hists, int max_rows)
+{
+        struct rb_node *next = rb_first(&hists->entries);
+        struct hist_entry *n;
+        int row = 0;
+
+        hists__reset_col_len(hists);
+
+        while (next && row++ < max_rows) {
+                n = rb_entry(next, struct hist_entry, rb_node);
+                if (!n->filtered)
+                        hists__calc_col_len(hists, n);
+                next = rb_next(&n->rb_node);
+        }
+}
+
 static void hist_entry__add_cpumode_period(struct hist_entry *he,
                                            unsigned int cpumode, u64 period)
 {
@@ -378,7 +394,7 @@ void hist_entry__free(struct hist_entry *he)
  * collapse the histogram
  */
 
-static bool hists__collapse_insert_entry(struct hists *hists __used,
+static bool hists__collapse_insert_entry(struct hists *hists __maybe_unused,
                                          struct rb_root *root,
                                          struct hist_entry *he)
 {
@@ -394,8 +410,13 @@ static bool hists__collapse_insert_entry(struct hists *hists __used,
                 cmp = hist_entry__collapse(iter, he);
 
                 if (!cmp) {
-                        iter->period += he->period;
-                        iter->nr_events += he->nr_events;
+                        iter->period            += he->period;
+                        iter->period_sys        += he->period_sys;
+                        iter->period_us         += he->period_us;
+                        iter->period_guest_sys  += he->period_guest_sys;
+                        iter->period_guest_us   += he->period_guest_us;
+                        iter->nr_events         += he->nr_events;
+
                         if (symbol_conf.use_callchain) {
                                 callchain_cursor_reset(&callchain_cursor);
                                 callchain_merge(&callchain_cursor,
@@ -547,674 +568,6 @@ void hists__output_resort_threaded(struct hists *hists)
         return __hists__output_resort(hists, true);
 }
 
-static size_t callchain__fprintf_left_margin(FILE *fp, int left_margin)
-{
-        int i;
-        int ret = fprintf(fp, "            ");
-
-        for (i = 0; i < left_margin; i++)
-                ret += fprintf(fp, " ");
-
-        return ret;
-}
-
-static size_t ipchain__fprintf_graph_line(FILE *fp, int depth, int depth_mask,
-                                          int left_margin)
-{
-        int i;
-        size_t ret = callchain__fprintf_left_margin(fp, left_margin);
-
-        for (i = 0; i < depth; i++)
-                if (depth_mask & (1 << i))
-                        ret += fprintf(fp, "|          ");
-                else
-                        ret += fprintf(fp, "           ");
-
-        ret += fprintf(fp, "\n");
-
-        return ret;
-}
-
-static size_t ipchain__fprintf_graph(FILE *fp, struct callchain_list *chain,
-                                     int depth, int depth_mask, int period,
-                                     u64 total_samples, u64 hits,
-                                     int left_margin)
-{
-        int i;
-        size_t ret = 0;
-
-        ret += callchain__fprintf_left_margin(fp, left_margin);
-        for (i = 0; i < depth; i++) {
-                if (depth_mask & (1 << i))
-                        ret += fprintf(fp, "|");
-                else
-                        ret += fprintf(fp, " ");
-                if (!period && i == depth - 1) {
-                        double percent;
-
-                        percent = hits * 100.0 / total_samples;
-                        ret += percent_color_fprintf(fp, "--%2.2f%%-- ", percent);
-                } else
-                        ret += fprintf(fp, "%s", "          ");
-        }
-        if (chain->ms.sym)
-                ret += fprintf(fp, "%s\n", chain->ms.sym->name);
-        else
-                ret += fprintf(fp, "0x%0" PRIx64 "\n", chain->ip);
-
-        return ret;
-}
-
-static struct symbol *rem_sq_bracket;
-static struct callchain_list rem_hits;
-
-static void init_rem_hits(void)
-{
-        rem_sq_bracket = malloc(sizeof(*rem_sq_bracket) + 6);
-        if (!rem_sq_bracket) {
-                fprintf(stderr, "Not enough memory to display remaining hits\n");
-                return;
-        }
-
-        strcpy(rem_sq_bracket->name, "[...]");
-        rem_hits.ms.sym = rem_sq_bracket;
-}
-
-static size_t __callchain__fprintf_graph(FILE *fp, struct rb_root *root,
-                                         u64 total_samples, int depth,
-                                         int depth_mask, int left_margin)
-{
-        struct rb_node *node, *next;
-        struct callchain_node *child;
-        struct callchain_list *chain;
-        int new_depth_mask = depth_mask;
-        u64 remaining;
-        size_t ret = 0;
-        int i;
-        uint entries_printed = 0;
-
-        remaining = total_samples;
-
-        node = rb_first(root);
-        while (node) {
-                u64 new_total;
-                u64 cumul;
-
-                child = rb_entry(node, struct callchain_node, rb_node);
-                cumul = callchain_cumul_hits(child);
-                remaining -= cumul;
-
-                /*
-                 * The depth mask manages the output of pipes that show
-                 * the depth. We don't want to keep the pipes of the current
-                 * level for the last child of this depth.
-                 * Except if we have remaining filtered hits. They will
-                 * supersede the last child
-                 */
-                next = rb_next(node);
-                if (!next && (callchain_param.mode != CHAIN_GRAPH_REL || !remaining))
-                        new_depth_mask &= ~(1 << (depth - 1));
-
-                /*
-                 * But we keep the older depth mask for the line separator
-                 * to keep the level link until we reach the last child
-                 */
-                ret += ipchain__fprintf_graph_line(fp, depth, depth_mask,
-                                                   left_margin);
-                i = 0;
-                list_for_each_entry(chain, &child->val, list) {
-                        ret += ipchain__fprintf_graph(fp, chain, depth,
-                                                      new_depth_mask, i++,
-                                                      total_samples,
-                                                      cumul,
-                                                      left_margin);
-                }
-
-                if (callchain_param.mode == CHAIN_GRAPH_REL)
-                        new_total = child->children_hit;
-                else
-                        new_total = total_samples;
-
-                ret += __callchain__fprintf_graph(fp, &child->rb_root, new_total,
-                                                  depth + 1,
-                                                  new_depth_mask | (1 << depth),
-                                                  left_margin);
-                node = next;
-                if (++entries_printed == callchain_param.print_limit)
-                        break;
-        }
-
-        if (callchain_param.mode == CHAIN_GRAPH_REL &&
-                remaining && remaining != total_samples) {
-
-                if (!rem_sq_bracket)
-                        return ret;
-
-                new_depth_mask &= ~(1 << (depth - 1));
-                ret += ipchain__fprintf_graph(fp, &rem_hits, depth,
-                                              new_depth_mask, 0, total_samples,
-                                              remaining, left_margin);
-        }
-
-        return ret;
-}
-
-static size_t callchain__fprintf_graph(FILE *fp, struct rb_root *root,
-                                       u64 total_samples, int left_margin)
-{
-        struct callchain_node *cnode;
-        struct callchain_list *chain;
-        u32 entries_printed = 0;
-        bool printed = false;
-        struct rb_node *node;
-        int i = 0;
-        int ret = 0;
-
-        /*
-         * If have one single callchain root, don't bother printing
-         * its percentage (100 % in fractal mode and the same percentage
-         * than the hist in graph mode). This also avoid one level of column.
-         */
-        node = rb_first(root);
-        if (node && !rb_next(node)) {
-                cnode = rb_entry(node, struct callchain_node, rb_node);
-                list_for_each_entry(chain, &cnode->val, list) {
-                        /*
-                         * If we sort by symbol, the first entry is the same than
-                         * the symbol. No need to print it otherwise it appears as
-                         * displayed twice.
-                         */
-                        if (!i++ && sort__first_dimension == SORT_SYM)
-                                continue;
-                        if (!printed) {
-                                ret += callchain__fprintf_left_margin(fp, left_margin);
-                                ret += fprintf(fp, "|\n");
-                                ret += callchain__fprintf_left_margin(fp, left_margin);
-                                ret += fprintf(fp, "---");
-                                left_margin += 3;
-                                printed = true;
-                        } else
-                                ret += callchain__fprintf_left_margin(fp, left_margin);
-
-                        if (chain->ms.sym)
-                                ret += fprintf(fp, " %s\n", chain->ms.sym->name);
-                        else
-                                ret += fprintf(fp, " %p\n", (void *)(long)chain->ip);
-
-                        if (++entries_printed == callchain_param.print_limit)
-                                break;
-                }
-                root = &cnode->rb_root;
-        }
-
-        ret += __callchain__fprintf_graph(fp, root, total_samples,
-                                          1, 1, left_margin);
-        ret += fprintf(fp, "\n");
-
-        return ret;
-}
-
-static size_t __callchain__fprintf_flat(FILE *fp,
-                                        struct callchain_node *self,
-                                        u64 total_samples)
-{
-        struct callchain_list *chain;
-        size_t ret = 0;
-
-        if (!self)
-                return 0;
-
-        ret += __callchain__fprintf_flat(fp, self->parent, total_samples);
-
-
-        list_for_each_entry(chain, &self->val, list) {
-                if (chain->ip >= PERF_CONTEXT_MAX)
-                        continue;
-                if (chain->ms.sym)
-                        ret += fprintf(fp, "                %s\n", chain->ms.sym->name);
-                else
-                        ret += fprintf(fp, "                %p\n",
-                                        (void *)(long)chain->ip);
-        }
-
-        return ret;
-}
-
-static size_t callchain__fprintf_flat(FILE *fp, struct rb_root *self,
-                                      u64 total_samples)
-{
-        size_t ret = 0;
-        u32 entries_printed = 0;
-        struct rb_node *rb_node;
-        struct callchain_node *chain;
-
-        rb_node = rb_first(self);
-        while (rb_node) {
-                double percent;
-
-                chain = rb_entry(rb_node, struct callchain_node, rb_node);
-                percent = chain->hit * 100.0 / total_samples;
-
-                ret = percent_color_fprintf(fp, "           %6.2f%%\n", percent);
-                ret += __callchain__fprintf_flat(fp, chain, total_samples);
-                ret += fprintf(fp, "\n");
-                if (++entries_printed == callchain_param.print_limit)
-                        break;
-
-                rb_node = rb_next(rb_node);
-        }
-
-        return ret;
-}
-
-static size_t hist_entry_callchain__fprintf(struct hist_entry *he,
-                                            u64 total_samples, int left_margin,
-                                            FILE *fp)
-{
-        switch (callchain_param.mode) {
-        case CHAIN_GRAPH_REL:
-                return callchain__fprintf_graph(fp, &he->sorted_chain, he->period,
-                                                left_margin);
-                break;
-        case CHAIN_GRAPH_ABS:
-                return callchain__fprintf_graph(fp, &he->sorted_chain, total_samples,
-                                                left_margin);
-                break;
-        case CHAIN_FLAT:
-                return callchain__fprintf_flat(fp, &he->sorted_chain, total_samples);
-                break;
-        case CHAIN_NONE:
-                break;
-        default:
-                pr_err("Bad callchain mode\n");
-        }
-
-        return 0;
-}
-
-void hists__output_recalc_col_len(struct hists *hists, int max_rows)
-{
-        struct rb_node *next = rb_first(&hists->entries);
-        struct hist_entry *n;
-        int row = 0;
-
-        hists__reset_col_len(hists);
-
-        while (next && row++ < max_rows) {
-                n = rb_entry(next, struct hist_entry, rb_node);
-                if (!n->filtered)
-                        hists__calc_col_len(hists, n);
-                next = rb_next(&n->rb_node);
-        }
-}
-
-static int hist_entry__pcnt_snprintf(struct hist_entry *he, char *s,
-                                     size_t size, struct hists *pair_hists,
-                                     bool show_displacement, long displacement,
-                                     bool color, u64 total_period)
-{
-        u64 period, total, period_sys, period_us, period_guest_sys, period_guest_us;
-        u64 nr_events;
-        const char *sep = symbol_conf.field_sep;
-        int ret;
-
-        if (symbol_conf.exclude_other && !he->parent)
-                return 0;
-
-        if (pair_hists) {
-                period = he->pair ? he->pair->period : 0;
-                nr_events = he->pair ? he->pair->nr_events : 0;
-                total = pair_hists->stats.total_period;
-                period_sys = he->pair ? he->pair->period_sys : 0;
-                period_us = he->pair ? he->pair->period_us : 0;
-                period_guest_sys = he->pair ? he->pair->period_guest_sys : 0;
-                period_guest_us = he->pair ? he->pair->period_guest_us : 0;
-        } else {
-                period = he->period;
-                nr_events = he->nr_events;
-                total = total_period;
-                period_sys = he->period_sys;
-                period_us = he->period_us;
-                period_guest_sys = he->period_guest_sys;
-                period_guest_us = he->period_guest_us;
-        }
-
-        if (total) {
-                if (color)
-                        ret = percent_color_snprintf(s, size,
-                                                     sep ? "%.2f" : "   %6.2f%%",
-                                                     (period * 100.0) / total);
-                else
-                        ret = scnprintf(s, size, sep ? "%.2f" : "   %6.2f%%",
-                                       (period * 100.0) / total);
-                if (symbol_conf.show_cpu_utilization) {
-                        ret += percent_color_snprintf(s + ret, size - ret,
-                                        sep ? "%.2f" : "   %6.2f%%",
-                                        (period_sys * 100.0) / total);
-                        ret += percent_color_snprintf(s + ret, size - ret,
-                                        sep ? "%.2f" : "   %6.2f%%",
-                                        (period_us * 100.0) / total);
-                        if (perf_guest) {
-                                ret += percent_color_snprintf(s + ret,
-                                                size - ret,
-                                                sep ? "%.2f" : "   %6.2f%%",
-                                                (period_guest_sys * 100.0) /
-                                                                total);
-                                ret += percent_color_snprintf(s + ret,
-                                                size - ret,
-                                                sep ? "%.2f" : "   %6.2f%%",
-                                                (period_guest_us * 100.0) /
-                                                                total);
-                        }
-                }
-        } else
-                ret = scnprintf(s, size, sep ? "%" PRIu64 : "%12" PRIu64 " ", period);
-
-        if (symbol_conf.show_nr_samples) {
-                if (sep)
-                        ret += scnprintf(s + ret, size - ret, "%c%" PRIu64, *sep, nr_events);
-                else
-                        ret += scnprintf(s + ret, size - ret, "%11" PRIu64, nr_events);
-        }
-
-        if (symbol_conf.show_total_period) {
-                if (sep)
-                        ret += scnprintf(s + ret, size - ret, "%c%" PRIu64, *sep, period);
-                else
-                        ret += scnprintf(s + ret, size - ret, " %12" PRIu64, period);
-        }
-
-        if (pair_hists) {
-                char bf[32];
-                double old_percent = 0, new_percent = 0, diff;
-
-                if (total > 0)
-                        old_percent = (period * 100.0) / total;
-                if (total_period > 0)
-                        new_percent = (he->period * 100.0) / total_period;
-
-                diff = new_percent - old_percent;
-
-                if (fabs(diff) >= 0.01)
-                        scnprintf(bf, sizeof(bf), "%+4.2F%%", diff);
-                else
-                        scnprintf(bf, sizeof(bf), " ");
-
-                if (sep)
-                        ret += scnprintf(s + ret, size - ret, "%c%s", *sep, bf);
-                else
-                        ret += scnprintf(s + ret, size - ret, "%11.11s", bf);
-
-                if (show_displacement) {
-                        if (displacement)
-                                scnprintf(bf, sizeof(bf), "%+4ld", displacement);
-                        else
-                                scnprintf(bf, sizeof(bf), " ");
-
-                        if (sep)
-                                ret += scnprintf(s + ret, size - ret, "%c%s", *sep, bf);
-                        else
-                                ret += scnprintf(s + ret, size - ret, "%6.6s", bf);
-                }
-        }
-
-        return ret;
-}
-
-int hist_entry__snprintf(struct hist_entry *he, char *s, size_t size,
-                         struct hists *hists)
-{
-        const char *sep = symbol_conf.field_sep;
-        struct sort_entry *se;
-        int ret = 0;
-
-        list_for_each_entry(se, &hist_entry__sort_list, list) {
-                if (se->elide)
-                        continue;
-
-                ret += scnprintf(s + ret, size - ret, "%s", sep ?: "  ");
-                ret += se->se_snprintf(he, s + ret, size - ret,
-                                       hists__col_len(hists, se->se_width_idx));
-        }
-
-        return ret;
-}
-
-static int hist_entry__fprintf(struct hist_entry *he, size_t size,
-                               struct hists *hists, struct hists *pair_hists,
-                               bool show_displacement, long displacement,
-                               u64 total_period, FILE *fp)
-{
-        char bf[512];
-        int ret;
-
-        if (size == 0 || size > sizeof(bf))
-                size = sizeof(bf);
-
-        ret = hist_entry__pcnt_snprintf(he, bf, size, pair_hists,
-                                        show_displacement, displacement,
-                                        true, total_period);
-        hist_entry__snprintf(he, bf + ret, size - ret, hists);
-        return fprintf(fp, "%s\n", bf);
-}
-
-static size_t hist_entry__fprintf_callchain(struct hist_entry *he,
-                                            struct hists *hists,
-                                            u64 total_period, FILE *fp)
-{
-        int left_margin = 0;
-
-        if (sort__first_dimension == SORT_COMM) {
-                struct sort_entry *se = list_first_entry(&hist_entry__sort_list,
-                                                         typeof(*se), list);
-                left_margin = hists__col_len(hists, se->se_width_idx);
-                left_margin -= thread__comm_len(he->thread);
-        }
-
-        return hist_entry_callchain__fprintf(he, total_period, left_margin, fp);
-}
-
-size_t hists__fprintf(struct hists *hists, struct hists *pair,
-                      bool show_displacement, bool show_header, int max_rows,
-                      int max_cols, FILE *fp)
-{
-        struct sort_entry *se;
-        struct rb_node *nd;
-        size_t ret = 0;
-        u64 total_period;
-        unsigned long position = 1;
-        long displacement = 0;
-        unsigned int width;
-        const char *sep = symbol_conf.field_sep;
-        const char *col_width = symbol_conf.col_width_list_str;
-        int nr_rows = 0;
-
-        init_rem_hits();
-
-        if (!show_header)
-                goto print_entries;
-
-        fprintf(fp, "# %s", pair ? "Baseline" : "Overhead");
-
-        if (symbol_conf.show_cpu_utilization) {
-                if (sep) {
-                        ret += fprintf(fp, "%csys", *sep);
-                        ret += fprintf(fp, "%cus", *sep);
-                        if (perf_guest) {
-                                ret += fprintf(fp, "%cguest sys", *sep);
-                                ret += fprintf(fp, "%cguest us", *sep);
-                        }
-                } else {
-                        ret += fprintf(fp, "     sys  ");
-                        ret += fprintf(fp, "      us  ");
-                        if (perf_guest) {
-                                ret += fprintf(fp, "  guest sys  ");
-                                ret += fprintf(fp, "  guest us  ");
-                        }
-                }
-        }
-
-        if (symbol_conf.show_nr_samples) {
-                if (sep)
-                        fprintf(fp, "%cSamples", *sep);
-                else
-                        fputs("  Samples  ", fp);
-        }
-
-        if (symbol_conf.show_total_period) {
-                if (sep)
-                        ret += fprintf(fp, "%cPeriod", *sep);
-                else
-                        ret += fprintf(fp, "   Period    ");
-        }
-
-        if (pair) {
-                if (sep)
-                        ret += fprintf(fp, "%cDelta", *sep);
-                else
-                        ret += fprintf(fp, "  Delta    ");
-
-                if (show_displacement) {
-                        if (sep)
-                                ret += fprintf(fp, "%cDisplacement", *sep);
-                        else
-                                ret += fprintf(fp, " Displ");
-                }
-        }
-
-        list_for_each_entry(se, &hist_entry__sort_list, list) {
-                if (se->elide)
-                        continue;
-                if (sep) {
-                        fprintf(fp, "%c%s", *sep, se->se_header);
-                        continue;
-                }
-                width = strlen(se->se_header);
-                if (symbol_conf.col_width_list_str) {
-                        if (col_width) {
-                                hists__set_col_len(hists, se->se_width_idx,
-                                                   atoi(col_width));
-                                col_width = strchr(col_width, ',');
-                                if (col_width)
-                                        ++col_width;
-                        }
-                }
-                if (!hists__new_col_len(hists, se->se_width_idx, width))
-                        width = hists__col_len(hists, se->se_width_idx);
-                fprintf(fp, "  %*s", width, se->se_header);
-        }
-
-        fprintf(fp, "\n");
-        if (max_rows && ++nr_rows >= max_rows)
-                goto out;
-
-        if (sep)
-                goto print_entries;
-
-        fprintf(fp, "# ........");
-        if (symbol_conf.show_cpu_utilization)
-                fprintf(fp, "   .......   .......");
-        if (symbol_conf.show_nr_samples)
-                fprintf(fp, " ..........");
-        if (symbol_conf.show_total_period)
-                fprintf(fp, " ............");
-        if (pair) {
-                fprintf(fp, " ..........");
-                if (show_displacement)
-                        fprintf(fp, " .....");
-        }
-        list_for_each_entry(se, &hist_entry__sort_list, list) {
-                unsigned int i;
-
-                if (se->elide)
-                        continue;
-
-                fprintf(fp, "  ");
-                width = hists__col_len(hists, se->se_width_idx);
-                if (width == 0)
-                        width = strlen(se->se_header);
-                for (i = 0; i < width; i++)
-                        fprintf(fp, ".");
-        }
-
-        fprintf(fp, "\n");
-        if (max_rows && ++nr_rows >= max_rows)
-                goto out;
-
-        fprintf(fp, "#\n");
-        if (max_rows && ++nr_rows >= max_rows)
-                goto out;
-
-print_entries:
-        total_period = hists->stats.total_period;
-
-        for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
-                struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
-
-                if (h->filtered)
-                        continue;
-
-                if (show_displacement) {
-                        if (h->pair != NULL)
-                                displacement = ((long)h->pair->position -
-                                                (long)position);
-                        else
-                                displacement = 0;
-                        ++position;
-                }
-                ret += hist_entry__fprintf(h, max_cols, hists, pair, show_displacement,
-                                           displacement, total_period, fp);
-
-                if (symbol_conf.use_callchain)
-                        ret += hist_entry__fprintf_callchain(h, hists, total_period, fp);
-                if (max_rows && ++nr_rows >= max_rows)
-                        goto out;
-
-                if (h->ms.map == NULL && verbose > 1) {
-                        __map_groups__fprintf_maps(&h->thread->mg,
-                                                   MAP__FUNCTION, verbose, fp);
-                        fprintf(fp, "%.10s end\n", graph_dotted_line);
-                }
-        }
-out:
-        free(rem_sq_bracket);
-
-        return ret;
-}
-
-/*
- * See hists__fprintf to match the column widths
- */
-unsigned int hists__sort_list_width(struct hists *hists)
-{
-        struct sort_entry *se;
-        int ret = 9; /* total % */
-
-        if (symbol_conf.show_cpu_utilization) {
-                ret += 7; /* count_sys % */
-                ret += 6; /* count_us % */
-                if (perf_guest) {
-                        ret += 13; /* count_guest_sys % */
-                        ret += 12; /* count_guest_us % */
-                }
-        }
-
-        if (symbol_conf.show_nr_samples)
-                ret += 11;
-
-        if (symbol_conf.show_total_period)
-                ret += 13;
-
-        list_for_each_entry(se, &hist_entry__sort_list, list)
-                if (!se->elide)
-                        ret += 2 + hists__col_len(hists, se->se_width_idx);
-
-        if (verbose) /* Addr + origin */
-                ret += 3 + BITS_PER_LONG / 4;
-
-        return ret;
-}
-
 static void hists__remove_entry_filter(struct hists *hists, struct hist_entry *h,
                                        enum hist_filter filter)
 {
@@ -1342,25 +695,3 @@ void hists__inc_nr_events(struct hists *hists, u32 type)
         ++hists->stats.nr_events[0];
         ++hists->stats.nr_events[type];
 }
-
-size_t hists__fprintf_nr_events(struct hists *hists, FILE *fp)
-{
-        int i;
-        size_t ret = 0;
-
-        for (i = 0; i < PERF_RECORD_HEADER_MAX; ++i) {
-                const char *name;
-
-                if (hists->stats.nr_events[i] == 0)
-                        continue;
-
-                name = perf_event__name(i);
-                if (!strcmp(name, "UNKNOWN"))
-                        continue;
-
-                ret += fprintf(fp, "%16s events: %10d\n", name,
-                               hists->stats.nr_events[i]);
-        }
-
-        return ret;
-}
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 0b096c27a419..f011ad4756e8 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -75,8 +75,8 @@ struct hist_entry *__hists__add_entry(struct hists *self,
                                       struct symbol *parent, u64 period);
 int64_t hist_entry__cmp(struct hist_entry *left, struct hist_entry *right);
 int64_t hist_entry__collapse(struct hist_entry *left, struct hist_entry *right);
-int hist_entry__snprintf(struct hist_entry *self, char *bf, size_t size,
-                         struct hists *hists);
+int hist_entry__sort_snprintf(struct hist_entry *self, char *bf, size_t size,
+                              struct hists *hists);
 void hist_entry__free(struct hist_entry *);
 
 struct hist_entry *__hists__add_branch_entry(struct hists *self,
@@ -112,25 +112,66 @@ void hists__filter_by_symbol(struct hists *hists);
 u16 hists__col_len(struct hists *self, enum hist_column col);
 void hists__set_col_len(struct hists *self, enum hist_column col, u16 len);
 bool hists__new_col_len(struct hists *self, enum hist_column col, u16 len);
+void hists__reset_col_len(struct hists *hists);
+void hists__calc_col_len(struct hists *hists, struct hist_entry *he);
+
+struct perf_hpp {
+        char *buf;
+        size_t size;
+        u64 total_period;
+        const char *sep;
+        long displacement;
+        void *ptr;
+};
+
+struct perf_hpp_fmt {
+        bool cond;
+        int (*header)(struct perf_hpp *hpp);
+        int (*width)(struct perf_hpp *hpp);
+        int (*color)(struct perf_hpp *hpp, struct hist_entry *he);
+        int (*entry)(struct perf_hpp *hpp, struct hist_entry *he);
+};
+
+extern struct perf_hpp_fmt perf_hpp__format[];
+
+enum {
+        PERF_HPP__OVERHEAD,
+        PERF_HPP__OVERHEAD_SYS,
+        PERF_HPP__OVERHEAD_US,
+        PERF_HPP__OVERHEAD_GUEST_SYS,
+        PERF_HPP__OVERHEAD_GUEST_US,
+        PERF_HPP__SAMPLES,
+        PERF_HPP__PERIOD,
+        PERF_HPP__DELTA,
+        PERF_HPP__DISPL,
+
+        PERF_HPP__MAX_INDEX
+};
+
+void perf_hpp__init(bool need_pair, bool show_displacement);
+int hist_entry__period_snprintf(struct perf_hpp *hpp, struct hist_entry *he,
+                                bool color);
 
 struct perf_evlist;
 
 #ifdef NO_NEWT_SUPPORT
 static inline
-int perf_evlist__tui_browse_hists(struct perf_evlist *evlist __used,
-                                  const char *help __used,
-                                  void(*timer)(void *arg) __used,
-                                  void *arg __used,
-                                  int refresh __used)
+int perf_evlist__tui_browse_hists(struct perf_evlist *evlist __maybe_unused,
+                                  const char *help __maybe_unused,
+                                  void(*timer)(void *arg) __maybe_unused,
+                                  void *arg __maybe_unused,
+                                  int refresh __maybe_unused)
 {
         return 0;
 }
 
-static inline int hist_entry__tui_annotate(struct hist_entry *self __used,
-                                           int evidx __used,
-                                           void(*timer)(void *arg) __used,
-                                           void *arg __used,
-                                           int delay_secs __used)
+static inline int hist_entry__tui_annotate(struct hist_entry *self
+                                           __maybe_unused,
+                                           int evidx __maybe_unused,
+                                           void(*timer)(void *arg)
+                                           __maybe_unused,
+                                           void *arg __maybe_unused,
+                                           int delay_secs __maybe_unused)
 {
         return 0;
 }
@@ -148,11 +189,11 @@ int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
 
 #ifdef NO_GTK2_SUPPORT
 static inline
-int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist __used,
-                                  const char *help __used,
-                                  void(*timer)(void *arg) __used,
-                                  void *arg __used,
-                                  int refresh __used)
+int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist __maybe_unused,
+                                  const char *help __maybe_unused,
+                                  void(*timer)(void *arg) __maybe_unused,
+                                  void *arg __maybe_unused,
+                                  int refresh __maybe_unused)
 {
         return 0;
 }
diff --git a/tools/perf/util/include/linux/bitops.h b/tools/perf/util/include/linux/bitops.h
index 587a230d2075..a55d8cf083c9 100644
--- a/tools/perf/util/include/linux/bitops.h
+++ b/tools/perf/util/include/linux/bitops.h
@@ -5,6 +5,10 @@
 #include <linux/compiler.h>
 #include <asm/hweight.h>
 
+#ifndef __WORDSIZE
+#define __WORDSIZE (__SIZEOF_LONG__ * 8)
+#endif
+
 #define BITS_PER_LONG __WORDSIZE
 #define BITS_PER_BYTE           8
 #define BITS_TO_LONGS(nr)       DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
diff --git a/tools/perf/util/include/linux/compiler.h b/tools/perf/util/include/linux/compiler.h
index 547628e97f3d..96b919dae11c 100644
--- a/tools/perf/util/include/linux/compiler.h
+++ b/tools/perf/util/include/linux/compiler.h
@@ -9,6 +9,13 @@
 #define __attribute_const__
 #endif
 
-#define __used          __attribute__((__unused__))
+#ifndef __maybe_unused
+#define __maybe_unused          __attribute__((unused))
+#endif
+#define __packed        __attribute__((__packed__))
+
+#ifndef __force
+#define __force
+#endif
 
 #endif
diff --git a/tools/perf/util/include/linux/kernel.h b/tools/perf/util/include/linux/kernel.h
index b6842c1d02a8..d8c927c868ee 100644
--- a/tools/perf/util/include/linux/kernel.h
+++ b/tools/perf/util/include/linux/kernel.h
@@ -8,8 +8,8 @@
 
 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 
-#define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
-#define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
+#define PERF_ALIGN(x, a)        __PERF_ALIGN_MASK(x, (typeof(x))(a)-1)
+#define __PERF_ALIGN_MASK(x, mask)      (((x)+(mask))&~(mask))
 
 #ifndef offsetof
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
@@ -46,9 +46,22 @@
         _min1 < _min2 ? _min1 : _min2; })
 #endif
 
+#ifndef roundup
+#define roundup(x, y) (                                \
+{                                                      \
+        const typeof(y) __y = y;                       \
+        (((x) + (__y - 1)) / __y) * __y;               \
+}                                                      \
+)
+#endif
+
 #ifndef BUG_ON
+#ifdef NDEBUG
+#define BUG_ON(cond) do { if (cond) {} } while (0)
+#else
 #define BUG_ON(cond) assert(!(cond))
 #endif
+#endif
 
 /*
  * Both need more care to handle endianness
diff --git a/tools/perf/util/include/linux/magic.h b/tools/perf/util/include/linux/magic.h
new file mode 100644
index 000000000000..58b64ed4da12
--- /dev/null
+++ b/tools/perf/util/include/linux/magic.h
@@ -0,0 +1,12 @@
+#ifndef _PERF_LINUX_MAGIC_H_
+#define _PERF_LINUX_MAGIC_H_
+
+#ifndef DEBUGFS_MAGIC
+#define DEBUGFS_MAGIC          0x64626720
+#endif
+
+#ifndef SYSFS_MAGIC
+#define SYSFS_MAGIC            0x62656572
+#endif
+
+#endif
diff --git a/tools/perf/util/include/linux/rbtree.h b/tools/perf/util/include/linux/rbtree.h
index 7a243a143037..2a030c5af3aa 100644
--- a/tools/perf/util/include/linux/rbtree.h
+++ b/tools/perf/util/include/linux/rbtree.h
@@ -1 +1,2 @@
+#include <stdbool.h>
 #include "../../../../include/linux/rbtree.h"
diff --git a/tools/perf/util/include/linux/string.h b/tools/perf/util/include/linux/string.h
index 3b2f5900276f..6f19c548ecc0 100644
--- a/tools/perf/util/include/linux/string.h
+++ b/tools/perf/util/include/linux/string.h
@@ -1 +1,3 @@
 #include <string.h>
+
+void *memdup(const void *src, size_t len);
diff --git a/tools/perf/util/include/linux/types.h b/tools/perf/util/include/linux/types.h
index 12de3b8112f9..eb464786c084 100644
--- a/tools/perf/util/include/linux/types.h
+++ b/tools/perf/util/include/linux/types.h
@@ -3,6 +3,14 @@
 
 #include <asm/types.h>
 
+#ifndef __bitwise
+#define __bitwise
+#endif
+
+#ifndef __le32
+typedef __u32 __bitwise __le32;
+#endif
+
 #define DECLARE_BITMAP(name,bits) \
         unsigned long name[BITS_TO_LONGS(bits)]
 
diff --git a/tools/perf/util/intlist.c b/tools/perf/util/intlist.c
index fd530dced9cb..9d0740024ba8 100644
--- a/tools/perf/util/intlist.c
+++ b/tools/perf/util/intlist.c
@@ -11,7 +11,7 @@
 
 #include "intlist.h"
 
-static struct rb_node *intlist__node_new(struct rblist *rblist __used,
+static struct rb_node *intlist__node_new(struct rblist *rblist __maybe_unused,
                                          const void *entry)
 {
         int i = (int)((long)entry);
@@ -31,7 +31,7 @@ static void int_node__delete(struct int_node *ilist)
         free(ilist);
 }
 
-static void intlist__node_delete(struct rblist *rblist __used,
+static void intlist__node_delete(struct rblist *rblist __maybe_unused,
                                  struct rb_node *rb_node)
 {
         struct int_node *node = container_of(rb_node, struct int_node, rb_node);
@@ -52,9 +52,9 @@ int intlist__add(struct intlist *ilist, int i)
         return rblist__add_node(&ilist->rblist, (void *)((long)i));
 }
 
-void intlist__remove(struct intlist *ilist __used, struct int_node *node)
+void intlist__remove(struct intlist *ilist, struct int_node *node)
 {
-        int_node__delete(node);
+        rblist__remove_node(&ilist->rblist, &node->rb_node);
 }
 
 struct int_node *intlist__find(struct intlist *ilist, int i)
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index cc33486ad9e2..ead5316b3f89 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -9,6 +9,7 @@
 #include "map.h"
 #include "thread.h"
 #include "strlist.h"
+#include "vdso.h"
 
 const char *map_type__name[MAP__NR_TYPES] = {
         [MAP__FUNCTION] = "Functions",
@@ -23,7 +24,6 @@ static inline int is_anon_memory(const char *filename)
 static inline int is_no_dso_memory(const char *filename)
 {
         return !strcmp(filename, "[stack]") ||
-               !strcmp(filename, "[vdso]")  ||
                !strcmp(filename, "[heap]");
 }
 
@@ -52,9 +52,10 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
         if (self != NULL) {
                 char newfilename[PATH_MAX];
                 struct dso *dso;
-                int anon, no_dso;
+                int anon, no_dso, vdso;
 
                 anon = is_anon_memory(filename);
+                vdso = is_vdso_map(filename);
                 no_dso = is_no_dso_memory(filename);
 
                 if (anon) {
@@ -62,7 +63,12 @@ struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
                         filename = newfilename;
                 }
 
-                dso = __dsos__findnew(dsos__list, filename);
+                if (vdso) {
+                        pgoff = 0;
+                        dso = vdso__dso_findnew(dsos__list);
+                } else
+                        dso = __dsos__findnew(dsos__list, filename);
+
                 if (dso == NULL)
                         goto out_delete;
 
@@ -86,6 +92,25 @@ out_delete:
         return NULL;
 }
 
+/*
+ * Constructor variant for modules (where we know from /proc/modules where
+ * they are loaded) and for vmlinux, where only after we load all the
+ * symbols we'll know where it starts and ends.
+ */
+struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
+{
+        struct map *map = calloc(1, (sizeof(*map) +
+                                     (dso->kernel ? sizeof(struct kmap) : 0)));
+        if (map != NULL) {
+                /*
+                 * ->end will be filled after we load all the symbols
+                 */
+                map__init(map, type, start, 0, 0, dso);
+        }
+
+        return map;
+}
+
 void map__delete(struct map *self)
 {
         free(self);
@@ -137,6 +162,7 @@ int map__load(struct map *self, symbol_filter_t filter)
                 pr_warning(", continuing without symbols\n");
                 return -1;
         } else if (nr == 0) {
+#ifndef NO_LIBELF_SUPPORT
                 const size_t len = strlen(name);
                 const size_t real_len = len - sizeof(DSO__DELETED);
 
@@ -149,7 +175,7 @@ int map__load(struct map *self, symbol_filter_t filter)
                         pr_warning("no symbols found in %s, maybe install "
                                    "a debug package?\n", name);
                 }
-
+#endif
                 return -1;
         }
         /*
@@ -217,15 +243,14 @@ size_t map__fprintf(struct map *self, FILE *fp)
 
 size_t map__fprintf_dsoname(struct map *map, FILE *fp)
 {
-        const char *dsoname;
+        const char *dsoname = "[unknown]";
 
         if (map && map->dso && (map->dso->name || map->dso->long_name)) {
                 if (symbol_conf.show_kernel_path && map->dso->long_name)
                         dsoname = map->dso->long_name;
                 else if (map->dso->name)
                         dsoname = map->dso->name;
-        } else
-                dsoname = "[unknown]";
+        }
 
         return fprintf(fp, "%s", dsoname);
 }
@@ -242,14 +267,6 @@ u64 map__rip_2objdump(struct map *map, u64 rip)
         return addr;
 }
 
-u64 map__objdump_2ip(struct map *map, u64 addr)
-{
-        u64 ip = map->dso->adjust_symbols ?
-                        addr :
-                        map->unmap_ip(map, addr);       /* RIP -> IP */
-        return ip;
-}
-
 void map_groups__init(struct map_groups *mg)
 {
         int i;
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index 03a1e9b08b21..d2250fc97e25 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -96,7 +96,7 @@ static inline u64 map__unmap_ip(struct map *map, u64 ip)
         return ip + map->start - map->pgoff;
 }
 
-static inline u64 identity__map_ip(struct map *map __used, u64 ip)
+static inline u64 identity__map_ip(struct map *map __maybe_unused, u64 ip)
 {
         return ip;
 }
@@ -104,7 +104,6 @@ static inline u64 identity__map_ip(struct map *map __used, u64 ip)
 
 /* rip/ip <-> addr suitable for passing to `objdump --start-address=` */
 u64 map__rip_2objdump(struct map *map, u64 rip);
-u64 map__objdump_2ip(struct map *map, u64 addr);
 
 struct symbol;
 
@@ -115,6 +114,7 @@ void map__init(struct map *self, enum map_type type,
 struct map *map__new(struct list_head *dsos__list, u64 start, u64 len,
                      u64 pgoff, u32 pid, char *filename,
                      enum map_type type);
+struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
 void map__delete(struct map *self);
 struct map *map__clone(struct map *self);
 int map__overlap(struct map *l, struct map *r);
@@ -157,9 +157,12 @@ int machine__init(struct machine *self, const char *root_dir, pid_t pid);
 void machine__exit(struct machine *self);
 void machine__delete(struct machine *self);
 
+struct perf_evsel;
+struct perf_sample;
 int machine__resolve_callchain(struct machine *machine,
+                               struct perf_evsel *evsel,
                                struct thread *thread,
-                               struct ip_callchain *chain,
+                               struct perf_sample *sample,
                                struct symbol **parent);
 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, const char *symbol_name,
                                      u64 addr);
diff --git a/tools/perf/util/parse-events-test.c b/tools/perf/util/parse-events-test.c
index 127d648cc548..28c18d1d52c3 100644
--- a/tools/perf/util/parse-events-test.c
+++ b/tools/perf/util/parse-events-test.c
@@ -18,8 +18,7 @@ do { \
 
 static int test__checkevent_tracepoint(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
@@ -48,8 +47,7 @@ static int test__checkevent_tracepoint_multi(struct perf_evlist *evlist)
 
 static int test__checkevent_raw(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
@@ -59,8 +57,7 @@ static int test__checkevent_raw(struct perf_evlist *evlist)
 
 static int test__checkevent_numeric(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", 1 == evsel->attr.type);
@@ -70,8 +67,7 @@ static int test__checkevent_numeric(struct perf_evlist *evlist)
 
 static int test__checkevent_symbolic_name(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
@@ -82,8 +78,7 @@ static int test__checkevent_symbolic_name(struct perf_evlist *evlist)
 
 static int test__checkevent_symbolic_name_config(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
@@ -100,8 +95,7 @@ static int test__checkevent_symbolic_name_config(struct perf_evlist *evlist)
 
 static int test__checkevent_symbolic_alias(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_SOFTWARE == evsel->attr.type);
@@ -112,8 +106,7 @@ static int test__checkevent_symbolic_alias(struct perf_evlist *evlist)
 
 static int test__checkevent_genhw(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_HW_CACHE == evsel->attr.type);
@@ -123,8 +116,7 @@ static int test__checkevent_genhw(struct perf_evlist *evlist)
 
 static int test__checkevent_breakpoint(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT == evsel->attr.type);
@@ -138,8 +130,7 @@ static int test__checkevent_breakpoint(struct perf_evlist *evlist)
 
 static int test__checkevent_breakpoint_x(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_BREAKPOINT == evsel->attr.type);
@@ -152,8 +143,7 @@ static int test__checkevent_breakpoint_x(struct perf_evlist *evlist)
 
 static int test__checkevent_breakpoint_r(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type",
@@ -168,8 +158,7 @@ static int test__checkevent_breakpoint_r(struct perf_evlist *evlist)
 
 static int test__checkevent_breakpoint_w(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type",
@@ -184,8 +173,7 @@ static int test__checkevent_breakpoint_w(struct perf_evlist *evlist)
 
 static int test__checkevent_breakpoint_rw(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type",
@@ -200,8 +188,7 @@ static int test__checkevent_breakpoint_rw(struct perf_evlist *evlist)
 
 static int test__checkevent_tracepoint_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
@@ -232,8 +219,7 @@ test__checkevent_tracepoint_multi_modifier(struct perf_evlist *evlist)
 
 static int test__checkevent_raw_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
@@ -245,8 +231,7 @@ static int test__checkevent_raw_modifier(struct perf_evlist *evlist)
 
 static int test__checkevent_numeric_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
@@ -258,8 +243,7 @@ static int test__checkevent_numeric_modifier(struct perf_evlist *evlist)
 
 static int test__checkevent_symbolic_name_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
@@ -271,8 +255,7 @@ static int test__checkevent_symbolic_name_modifier(struct perf_evlist *evlist)
 
 static int test__checkevent_exclude_host_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
         TEST_ASSERT_VAL("wrong exclude host", evsel->attr.exclude_host);
@@ -282,8 +265,7 @@ static int test__checkevent_exclude_host_modifier(struct perf_evlist *evlist)
 
 static int test__checkevent_exclude_guest_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude guest", evsel->attr.exclude_guest);
         TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
@@ -293,8 +275,7 @@ static int test__checkevent_exclude_guest_modifier(struct perf_evlist *evlist)
 
 static int test__checkevent_symbolic_alias_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
@@ -306,8 +287,7 @@ static int test__checkevent_symbolic_alias_modifier(struct perf_evlist *evlist)
 
 static int test__checkevent_genhw_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
@@ -319,75 +299,71 @@ static int test__checkevent_genhw_modifier(struct perf_evlist *evlist)
 
 static int test__checkevent_breakpoint_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
+
 
         TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
         TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
         TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
         TEST_ASSERT_VAL("wrong name",
-                        !strcmp(perf_evsel__name(evsel), "mem:0x0:rw:u"));
+                        !strcmp(perf_evsel__name(evsel), "mem:0:u"));
 
         return test__checkevent_breakpoint(evlist);
 }
 
 static int test__checkevent_breakpoint_x_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
         TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
         TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
         TEST_ASSERT_VAL("wrong name",
-                        !strcmp(perf_evsel__name(evsel), "mem:0x0:x:k"));
+                        !strcmp(perf_evsel__name(evsel), "mem:0:x:k"));
 
         return test__checkevent_breakpoint_x(evlist);
 }
 
 static int test__checkevent_breakpoint_r_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
         TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
         TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
         TEST_ASSERT_VAL("wrong name",
-                        !strcmp(perf_evsel__name(evsel), "mem:0x0:r:hp"));
+                        !strcmp(perf_evsel__name(evsel), "mem:0:r:hp"));
 
         return test__checkevent_breakpoint_r(evlist);
 }
 
 static int test__checkevent_breakpoint_w_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
         TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
         TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
         TEST_ASSERT_VAL("wrong name",
-                        !strcmp(perf_evsel__name(evsel), "mem:0x0:w:up"));
+                        !strcmp(perf_evsel__name(evsel), "mem:0:w:up"));
 
         return test__checkevent_breakpoint_w(evlist);
 }
 
 static int test__checkevent_breakpoint_rw_modifier(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
         TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
         TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
         TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip);
         TEST_ASSERT_VAL("wrong name",
-                        !strcmp(perf_evsel__name(evsel), "mem:0x0:rw:kp"));
+                        !strcmp(perf_evsel__name(evsel), "mem:0:rw:kp"));
 
         return test__checkevent_breakpoint_rw(evlist);
 }
@@ -395,8 +371,7 @@ static int test__checkevent_breakpoint_rw_modifier(struct perf_evlist *evlist)
 static int test__checkevent_pmu(struct perf_evlist *evlist)
 {
 
-        struct perf_evsel *evsel = list_entry(evlist->entries.next,
-                                              struct perf_evsel, node);
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 1 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
@@ -410,12 +385,11 @@ static int test__checkevent_pmu(struct perf_evlist *evlist)
 
 static int test__checkevent_list(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel;
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         TEST_ASSERT_VAL("wrong number of entries", 3 == evlist->nr_entries);
 
         /* r1 */
-        evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
         TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
         TEST_ASSERT_VAL("wrong config1", 0 == evsel->attr.config1);
@@ -426,7 +400,7 @@ static int test__checkevent_list(struct perf_evlist *evlist)
         TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
 
         /* syscalls:sys_enter_open:k */
-        evsel = list_entry(evsel->node.next, struct perf_evsel, node);
+        evsel = perf_evsel__next(evsel);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
         TEST_ASSERT_VAL("wrong sample_type",
                 PERF_TP_SAMPLE_TYPE == evsel->attr.sample_type);
@@ -437,7 +411,7 @@ static int test__checkevent_list(struct perf_evlist *evlist)
         TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
 
         /* 1:1:hp */
-        evsel = list_entry(evsel->node.next, struct perf_evsel, node);
+        evsel = perf_evsel__next(evsel);
         TEST_ASSERT_VAL("wrong type", 1 == evsel->attr.type);
         TEST_ASSERT_VAL("wrong config", 1 == evsel->attr.config);
         TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
@@ -450,22 +424,21 @@ static int test__checkevent_list(struct perf_evlist *evlist)
 
 static int test__checkevent_pmu_name(struct perf_evlist *evlist)
 {
-        struct perf_evsel *evsel;
+        struct perf_evsel *evsel = perf_evlist__first(evlist);
 
         /* cpu/config=1,name=krava/u */
-        evsel = list_entry(evlist->entries.next, struct perf_evsel, node);
         TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
         TEST_ASSERT_VAL("wrong config",  1 == evsel->attr.config);
         TEST_ASSERT_VAL("wrong name", !strcmp(perf_evsel__name(evsel), "krava"));
 
         /* cpu/config=2/u" */
-        evsel = list_entry(evsel->node.next, struct perf_evsel, node);
+        evsel = perf_evsel__next(evsel);
         TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->nr_entries);
         TEST_ASSERT_VAL("wrong type", PERF_TYPE_RAW == evsel->attr.type);
         TEST_ASSERT_VAL("wrong config",  2 == evsel->attr.config);
         TEST_ASSERT_VAL("wrong name",
-                        !strcmp(perf_evsel__name(evsel), "raw 0x2:u"));
+                        !strcmp(perf_evsel__name(evsel), "cpu/config=2/u"));
 
         return 0;
 }
@@ -513,6 +486,280 @@ static int test__checkterms_simple(struct list_head *terms)
         return 0;
 }
 
+static int test__group1(struct perf_evlist *evlist)
+{
+        struct perf_evsel *evsel, *leader;
+
+        TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->nr_entries);
+
+        /* instructions:k */
+        evsel = leader = perf_evlist__first(evlist);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_INSTRUCTIONS == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == NULL);
+
+        /* cycles:upp */
+        evsel = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_CPU_CYCLES == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip == 2);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+
+        return 0;
+}
+
+static int test__group2(struct perf_evlist *evlist)
+{
+        struct perf_evsel *evsel, *leader;
+
+        TEST_ASSERT_VAL("wrong number of entries", 3 == evlist->nr_entries);
+
+        /* faults + :ku modifier */
+        evsel = leader = perf_evlist__first(evlist);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_SOFTWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_SW_PAGE_FAULTS == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == NULL);
+
+        /* cache-references + :u modifier */
+        evsel = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_CACHE_REFERENCES == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+
+        /* cycles:k */
+        evsel = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_CPU_CYCLES == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == NULL);
+
+        return 0;
+}
+
+static int test__group3(struct perf_evlist *evlist __maybe_unused)
+{
+        struct perf_evsel *evsel, *leader;
+
+        TEST_ASSERT_VAL("wrong number of entries", 5 == evlist->nr_entries);
+
+        /* group1 syscalls:sys_enter_open:H */
+        evsel = leader = perf_evlist__first(evlist);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_TRACEPOINT == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong sample_type",
+                PERF_TP_SAMPLE_TYPE == evsel->attr.sample_type);
+        TEST_ASSERT_VAL("wrong sample_period", 1 == evsel->attr.sample_period);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == NULL);
+        TEST_ASSERT_VAL("wrong group name",
+                !strcmp(leader->group_name, "group1"));
+
+        /* group1 cycles:kppp */
+        evsel = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_CPU_CYCLES == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip == 3);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+        TEST_ASSERT_VAL("wrong group name", !evsel->group_name);
+
+        /* group2 cycles + G modifier */
+        evsel = leader = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_CPU_CYCLES == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == NULL);
+        TEST_ASSERT_VAL("wrong group name",
+                !strcmp(leader->group_name, "group2"));
+
+        /* group2 1:3 + G modifier */
+        evsel = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", 1 == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config", 3 == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+
+        /* instructions:u */
+        evsel = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_INSTRUCTIONS == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == NULL);
+
+        return 0;
+}
+
+static int test__group4(struct perf_evlist *evlist __maybe_unused)
+{
+        struct perf_evsel *evsel, *leader;
+
+        TEST_ASSERT_VAL("wrong number of entries", 2 == evlist->nr_entries);
+
+        /* cycles:u + p */
+        evsel = leader = perf_evlist__first(evlist);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_CPU_CYCLES == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip == 1);
+        TEST_ASSERT_VAL("wrong group name", !evsel->group_name);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == NULL);
+
+        /* instructions:kp + p */
+        evsel = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_INSTRUCTIONS == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", evsel->attr.precise_ip == 2);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+
+        return 0;
+}
+
+static int test__group5(struct perf_evlist *evlist __maybe_unused)
+{
+        struct perf_evsel *evsel, *leader;
+
+        TEST_ASSERT_VAL("wrong number of entries", 5 == evlist->nr_entries);
+
+        /* cycles + G */
+        evsel = leader = perf_evlist__first(evlist);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_CPU_CYCLES == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong group name", !evsel->group_name);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == NULL);
+
+        /* instructions + G */
+        evsel = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_INSTRUCTIONS == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+
+        /* cycles:G */
+        evsel = leader = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_CPU_CYCLES == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong group name", !evsel->group_name);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == NULL);
+
+        /* instructions:G */
+        evsel = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_INSTRUCTIONS == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", !evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == leader);
+
+        /* cycles */
+        evsel = perf_evsel__next(evsel);
+        TEST_ASSERT_VAL("wrong type", PERF_TYPE_HARDWARE == evsel->attr.type);
+        TEST_ASSERT_VAL("wrong config",
+                        PERF_COUNT_HW_CPU_CYCLES == evsel->attr.config);
+        TEST_ASSERT_VAL("wrong exclude_user", !evsel->attr.exclude_user);
+        TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->attr.exclude_kernel);
+        TEST_ASSERT_VAL("wrong exclude_hv", !evsel->attr.exclude_hv);
+        TEST_ASSERT_VAL("wrong exclude guest", evsel->attr.exclude_guest);
+        TEST_ASSERT_VAL("wrong exclude host", !evsel->attr.exclude_host);
+        TEST_ASSERT_VAL("wrong precise_ip", !evsel->attr.precise_ip);
+        TEST_ASSERT_VAL("wrong leader", evsel->leader == NULL);
+
+        return 0;
+}
+
 struct test__event_st {
         const char *name;
         __u32 type;
@@ -632,6 +879,26 @@ static struct test__event_st test__events[] = {
                 .name  = "mem:0:rw:kp",
                 .check = test__checkevent_breakpoint_rw_modifier,
         },
+        [28] = {
+                .name  = "{instructions:k,cycles:upp}",
+                .check = test__group1,
+        },
+        [29] = {
+                .name  = "{faults:k,cache-references}:u,cycles:k",
+                .check = test__group2,
+        },
+        [30] = {
+                .name  = "group1{syscalls:sys_enter_open:H,cycles:kppp},group2{cycles,1:3}:G,instructions:u",
+                .check = test__group3,
+        },
+        [31] = {
+                .name  = "{cycles:u,instructions:kp}:p",
+                .check = test__group4,
+        },
+        [32] = {
+                .name  = "{cycles,instructions}:G,{cycles:G,instructions:G},cycles",
+                .check = test__group5,
+        },
 };
 
 static struct test__event_st test__events_pmu[] = {
@@ -658,9 +925,6 @@ static struct test__term test__terms[] = {
         },
 };
 
-#define TEST__TERMS_CNT (sizeof(test__terms) / \
-                         sizeof(struct test__term))
-
 static int test_event(struct test__event_st *e)
 {
         struct perf_evlist *evlist;
@@ -685,19 +949,19 @@ static int test_event(struct test__event_st *e)
 
 static int test_events(struct test__event_st *events, unsigned cnt)
 {
-        int ret = 0;
+        int ret1, ret2 = 0;
         unsigned i;
 
         for (i = 0; i < cnt; i++) {
                 struct test__event_st *e = &events[i];
 
                 pr_debug("running test %d '%s'\n", i, e->name);
-                ret = test_event(e);
-                if (ret)
-                        break;
+                ret1 = test_event(e);
+                if (ret1)
+                        ret2 = ret1;
         }
 
-        return ret;
+        return ret2;
 }
 
 static int test_term(struct test__term *t)
@@ -752,19 +1016,19 @@ static int test_pmu(void)
 
         ret = stat(path, &st);
         if (ret)
-                pr_debug("ommiting PMU cpu tests\n");
+                pr_debug("omitting PMU cpu tests\n");
         return !ret;
 }
 
 int parse_events__test(void)
 {
-        int ret;
+        int ret1, ret2 = 0;
 
 #define TEST_EVENTS(tests)                              \
 do {                                                    \
-        ret = test_events(tests, ARRAY_SIZE(tests));    \
-        if (ret)                                        \
-                return ret;                             \
+        ret1 = test_events(tests, ARRAY_SIZE(tests));   \
+        if (!ret2)                                      \
+                ret2 = ret1;                            \
 } while (0)
 
         TEST_EVENTS(test__events);
@@ -772,5 +1036,9 @@ do {							\
         if (test_pmu())
                 TEST_EVENTS(test__events_pmu);
 
-        return test_terms(test__terms, ARRAY_SIZE(test__terms));
+        ret1 = test_terms(test__terms, ARRAY_SIZE(test__terms));
+        if (!ret2)
+                ret2 = ret1;
+
+        return ret2;
 }
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 74a5af4d33ec..aed38e4b9dfa 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -239,8 +239,11 @@ const char *event_type(int type)
         return "unknown";
 }
 
-static int add_event(struct list_head **_list, int *idx,
-                     struct perf_event_attr *attr, char *name)
+
+
+static int __add_event(struct list_head **_list, int *idx,
+                       struct perf_event_attr *attr,
+                       char *name, struct cpu_map *cpus)
 {
         struct perf_evsel *evsel;
         struct list_head *list = *_list;
@@ -260,6 +263,7 @@ static int add_event(struct list_head **_list, int *idx,
                 return -ENOMEM;
         }
 
+        evsel->cpus = cpus;
         if (name)
                 evsel->name = strdup(name);
         list_add_tail(&evsel->node, list);
@@ -267,6 +271,12 @@ static int add_event(struct list_head **_list, int *idx,
         return 0;
 }
 
+static int add_event(struct list_head **_list, int *idx,
+                     struct perf_event_attr *attr, char *name)
+{
+        return __add_event(_list, idx, attr, name, NULL);
+}
+
 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
 {
         int i, j;
@@ -308,7 +318,7 @@ int parse_events_add_cache(struct list_head **list, int *idx,
         for (i = 0; (i < 2) && (op_result[i]); i++) {
                 char *str = op_result[i];
 
-                snprintf(name + n, MAX_NAME_LEN - n, "-%s\n", str);
+                n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
 
                 if (cache_op == -1) {
                         cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
@@ -346,42 +356,28 @@ int parse_events_add_cache(struct list_head **list, int *idx,
         return add_event(list, idx, &attr, name);
 }
 
-static int add_tracepoint(struct list_head **list, int *idx,
+static int add_tracepoint(struct list_head **listp, int *idx,
                           char *sys_name, char *evt_name)
 {
-        struct perf_event_attr attr;
-        char name[MAX_NAME_LEN];
-        char evt_path[MAXPATHLEN];
-        char id_buf[4];
-        u64 id;
-        int fd;
-
-        snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
-                 sys_name, evt_name);
-
-        fd = open(evt_path, O_RDONLY);
-        if (fd < 0)
-                return -1;
+        struct perf_evsel *evsel;
+        struct list_head *list = *listp;
 
-        if (read(fd, id_buf, sizeof(id_buf)) < 0) {
-                close(fd);
-                return -1;
+        if (!list) {
+                list = malloc(sizeof(*list));
+                if (!list)
+                        return -ENOMEM;
+                INIT_LIST_HEAD(list);
         }
 
-        close(fd);
-        id = atoll(id_buf);
-
-        memset(&attr, 0, sizeof(attr));
-        attr.config = id;
-        attr.type = PERF_TYPE_TRACEPOINT;
-        attr.sample_type |= PERF_SAMPLE_RAW;
-        attr.sample_type |= PERF_SAMPLE_TIME;
-        attr.sample_type |= PERF_SAMPLE_CPU;
-        attr.sample_type |= PERF_SAMPLE_PERIOD;
-        attr.sample_period = 1;
+        evsel = perf_evsel__newtp(sys_name, evt_name, (*idx)++);
+        if (!evsel) {
+                free(list);
+                return -ENOMEM;
+        }
 
-        snprintf(name, MAX_NAME_LEN, "%s:%s", sys_name, evt_name);
-        return add_event(list, idx, &attr, name);
+        list_add_tail(&evsel->node, list);
+        *listp = list;
+        return 0;
 }
 
 static int add_tracepoint_multi(struct list_head **list, int *idx,
@@ -551,7 +547,7 @@ static int config_attr(struct perf_event_attr *attr,
 }
 
 int parse_events_add_numeric(struct list_head **list, int *idx,
-                             unsigned long type, unsigned long config,
+                             u32 type, u64 config,
                              struct list_head *head_config)
 {
         struct perf_event_attr attr;
@@ -607,8 +603,23 @@ int parse_events_add_pmu(struct list_head **list, int *idx,
         if (perf_pmu__config(pmu, &attr, head_config))
                 return -EINVAL;
 
-        return add_event(list, idx, &attr,
-                         pmu_event_name(head_config));
+        return __add_event(list, idx, &attr, pmu_event_name(head_config),
+                           pmu->cpus);
+}
+
+int parse_events__modifier_group(struct list_head *list,
+                                 char *event_mod)
+{
+        return parse_events__modifier_event(list, event_mod, true);
+}
+
+void parse_events__set_leader(char *name, struct list_head *list)
+{
+        struct perf_evsel *leader;
+
+        __perf_evlist__set_leader(list);
+        leader = list_entry(list->next, struct perf_evsel, node);
+        leader->group_name = name ? strdup(name) : NULL;
 }
 
 void parse_events_update_lists(struct list_head *list_event,
@@ -616,21 +627,45 @@ void parse_events_update_lists(struct list_head *list_event,
 {
         /*
          * Called for single event definition. Update the
-         * 'all event' list, and reinit the 'signle event'
+         * 'all event' list, and reinit the 'single event'
          * list, for next event definition.
          */
         list_splice_tail(list_event, list_all);
         free(list_event);
 }
 
-int parse_events_modifier(struct list_head *list, char *str)
+struct event_modifier {
+        int eu;
+        int ek;
+        int eh;
+        int eH;
+        int eG;
+        int precise;
+        int exclude_GH;
+};
+
+static int get_event_modifier(struct event_modifier *mod, char *str,
+                               struct perf_evsel *evsel)
 {
-        struct perf_evsel *evsel;
-        int exclude = 0, exclude_GH = 0;
-        int eu = 0, ek = 0, eh = 0, eH = 0, eG = 0, precise = 0;
+        int eu = evsel ? evsel->attr.exclude_user : 0;
+        int ek = evsel ? evsel->attr.exclude_kernel : 0;
+        int eh = evsel ? evsel->attr.exclude_hv : 0;
+        int eH = evsel ? evsel->attr.exclude_host : 0;
+        int eG = evsel ? evsel->attr.exclude_guest : 0;
+        int precise = evsel ? evsel->attr.precise_ip : 0;
 
-        if (str == NULL)
-                return 0;
+        int exclude = eu | ek | eh;
+        int exclude_GH = evsel ? evsel->exclude_GH : 0;
+
+        /*
+         * We are here for group and 'GH' was not set as event
+         * modifier and whatever event/group modifier override
+         * default 'GH' setup.
+         */
+        if (evsel && !exclude_GH)
+                eH = eG = 0;
+
+        memset(mod, 0, sizeof(*mod));
 
         while (*str) {
                 if (*str == 'u') {
@@ -674,13 +709,51 @@ int parse_events_modifier(struct list_head *list, char *str)
         if (precise > 3)
                 return -EINVAL;
 
+        mod->eu = eu;
+        mod->ek = ek;
+        mod->eh = eh;
+        mod->eH = eH;
+        mod->eG = eG;
+        mod->precise = precise;
+        mod->exclude_GH = exclude_GH;
+        return 0;
+}
+
+int parse_events__modifier_event(struct list_head *list, char *str, bool add)
+{
+        struct perf_evsel *evsel;
+        struct event_modifier mod;
+
+        if (str == NULL)
+                return 0;
+
+        if (!add && get_event_modifier(&mod, str, NULL))
+                return -EINVAL;
+
         list_for_each_entry(evsel, list, node) {
-                evsel->attr.exclude_user   = eu;
-                evsel->attr.exclude_kernel = ek;
-                evsel->attr.exclude_hv     = eh;
-                evsel->attr.precise_ip     = precise;
-                evsel->attr.exclude_host   = eH;
-                evsel->attr.exclude_guest  = eG;
+
+                if (add && get_event_modifier(&mod, str, evsel))
+                        return -EINVAL;
+
+                evsel->attr.exclude_user   = mod.eu;
+                evsel->attr.exclude_kernel = mod.ek;
+                evsel->attr.exclude_hv     = mod.eh;
+                evsel->attr.precise_ip     = mod.precise;
+                evsel->attr.exclude_host   = mod.eH;
+                evsel->attr.exclude_guest  = mod.eG;
+                evsel->exclude_GH          = mod.exclude_GH;
+        }
+
+        return 0;
+}
+
+int parse_events_name(struct list_head *list, char *name)
+{
+        struct perf_evsel *evsel;
+
+        list_for_each_entry(evsel, list, node) {
+                if (!evsel->name)
+                        evsel->name = strdup(name);
         }
 
         return 0;
@@ -730,7 +803,8 @@ int parse_events_terms(struct list_head *terms, const char *str)
         return ret;
 }
 
-int parse_events(struct perf_evlist *evlist, const char *str, int unset __used)
+int parse_events(struct perf_evlist *evlist, const char *str,
+                 int unset __maybe_unused)
 {
         struct parse_events_data__events data = {
                 .list = LIST_HEAD_INIT(data.list),
@@ -756,20 +830,20 @@ int parse_events(struct perf_evlist *evlist, const char *str, int unset __used)
 }
 
 int parse_events_option(const struct option *opt, const char *str,
-                        int unset __used)
+                        int unset __maybe_unused)
 {
         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
         return parse_events(evlist, str, unset);
 }
 
 int parse_filter(const struct option *opt, const char *str,
-                 int unset __used)
+                 int unset __maybe_unused)
 {
         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
         struct perf_evsel *last = NULL;
 
         if (evlist->nr_entries > 0)
-                last = list_entry(evlist->entries.prev, struct perf_evsel, node);
+                last = perf_evlist__last(evlist);
 
         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
                 fprintf(stderr,
@@ -799,7 +873,8 @@ static const char * const event_type_descriptors[] = {
  * Print the events from <debugfs_mount_point>/tracing/events
  */
 
-void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
+void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
+                             bool name_only)
 {
         DIR *sys_dir, *evt_dir;
         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
@@ -829,6 +904,11 @@ void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
                             !strglobmatch(evt_dirent.d_name, event_glob))
                                 continue;
 
+                        if (name_only) {
+                                printf("%s:%s ", sys_dirent.d_name, evt_dirent.d_name);
+                                continue;
+                        }
+
                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
                                  sys_dirent.d_name, evt_dirent.d_name);
                         printf("  %-50s [%s]\n", evt_path,
@@ -906,7 +986,7 @@ void print_events_type(u8 type)
                 __print_events_type(type, event_symbols_hw, PERF_COUNT_HW_MAX);
 }
 
-int print_hwcache_events(const char *event_glob)
+int print_hwcache_events(const char *event_glob, bool name_only)
 {
         unsigned int type, op, i, printed = 0;
         char name[64];
@@ -923,8 +1003,11 @@ int print_hwcache_events(const char *event_glob)
                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
                                         continue;
 
-                                printf("  %-50s [%s]\n", name,
-                                        event_type_descriptors[PERF_TYPE_HW_CACHE]);
+                                if (name_only)
+                                        printf("%s ", name);
+                                else
+                                        printf("  %-50s [%s]\n", name,
+                                               event_type_descriptors[PERF_TYPE_HW_CACHE]);
                                 ++printed;
                         }
                 }
@@ -934,7 +1017,8 @@ int print_hwcache_events(const char *event_glob)
 }
 
 static void print_symbol_events(const char *event_glob, unsigned type,
-                                struct event_symbol *syms, unsigned max)
+                                struct event_symbol *syms, unsigned max,
+                                bool name_only)
 {
         unsigned i, printed = 0;
         char name[MAX_NAME_LEN];
@@ -946,6 +1030,11 @@ static void print_symbol_events(const char *event_glob, unsigned type,
                       (syms->alias && strglobmatch(syms->alias, event_glob))))
                         continue;
 
+                if (name_only) {
+                        printf("%s ", syms->symbol);
+                        continue;
+                }
+
                 if (strlen(syms->alias))
                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
                 else
@@ -963,39 +1052,42 @@ static void print_symbol_events(const char *event_glob, unsigned type,
 /*
  * Print the help text for the event symbols:
  */
-void print_events(const char *event_glob)
+void print_events(const char *event_glob, bool name_only)
 {
-
-        printf("\n");
-        printf("List of pre-defined events (to be used in -e):\n");
+        if (!name_only) {
+                printf("\n");
+                printf("List of pre-defined events (to be used in -e):\n");
+        }
 
         print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
-                            event_symbols_hw, PERF_COUNT_HW_MAX);
+                            event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
 
         print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
-                            event_symbols_sw, PERF_COUNT_SW_MAX);
+                            event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
 
-        print_hwcache_events(event_glob);
+        print_hwcache_events(event_glob, name_only);
 
         if (event_glob != NULL)
                 return;
 
-        printf("\n");
-        printf("  %-50s [%s]\n",
-               "rNNN",
-               event_type_descriptors[PERF_TYPE_RAW]);
-        printf("  %-50s [%s]\n",
-               "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
-               event_type_descriptors[PERF_TYPE_RAW]);
-        printf("   (see 'perf list --help' on how to encode it)\n");
-        printf("\n");
-
-        printf("  %-50s [%s]\n",
-                        "mem:<addr>[:access]",
+        if (!name_only) {
+                printf("\n");
+                printf("  %-50s [%s]\n",
+                       "rNNN",
+                       event_type_descriptors[PERF_TYPE_RAW]);
+                printf("  %-50s [%s]\n",
+                       "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
+                       event_type_descriptors[PERF_TYPE_RAW]);
+                printf("   (see 'perf list --help' on how to encode it)\n");
+                printf("\n");
+
+                printf("  %-50s [%s]\n",
+                       "mem:<addr>[:access]",
                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
-        printf("\n");
+                printf("\n");
+        }
 
-        print_tracepoint_events(NULL, NULL);
+        print_tracepoint_events(NULL, NULL, name_only);
 }
 
 int parse_events__is_hardcoded_term(struct parse_events__term *term)
@@ -1005,7 +1097,7 @@ int parse_events__is_hardcoded_term(struct parse_events__term *term)
 
 static int new_term(struct parse_events__term **_term, int type_val,
                     int type_term, char *config,
-                    char *str, long num)
+                    char *str, u64 num)
 {
         struct parse_events__term *term;
 
@@ -1034,7 +1126,7 @@ static int new_term(struct parse_events__term **_term, int type_val,
 }
 
 int parse_events__term_num(struct parse_events__term **term,
-                           int type_term, char *config, long num)
+                           int type_term, char *config, u64 num)
 {
         return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
                         config, NULL, num);
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index ee9c218a193c..c356e443448d 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -55,7 +55,7 @@ struct parse_events__term {
         char *config;
         union {
                 char *str;
-                long  num;
+                u64  num;
         } val;
         int type_val;
         int type_term;
@@ -73,17 +73,19 @@ struct parse_events_data__terms {
 
 int parse_events__is_hardcoded_term(struct parse_events__term *term);
 int parse_events__term_num(struct parse_events__term **_term,
-                           int type_term, char *config, long num);
+                           int type_term, char *config, u64 num);
 int parse_events__term_str(struct parse_events__term **_term,
                            int type_term, char *config, char *str);
 int parse_events__term_clone(struct parse_events__term **new,
                              struct parse_events__term *term);
 void parse_events__free_terms(struct list_head *terms);
-int parse_events_modifier(struct list_head *list, char *str);
+int parse_events__modifier_event(struct list_head *list, char *str, bool add);
+int parse_events__modifier_group(struct list_head *list, char *event_mod);
+int parse_events_name(struct list_head *list, char *name);
 int parse_events_add_tracepoint(struct list_head **list, int *idx,
                                 char *sys, char *event);
 int parse_events_add_numeric(struct list_head **list, int *idx,
-                             unsigned long type, unsigned long config,
+                             u32 type, u64 config,
                              struct list_head *head_config);
 int parse_events_add_cache(struct list_head **list, int *idx,
                            char *type, char *op_result1, char *op_result2);
@@ -91,15 +93,17 @@ int parse_events_add_breakpoint(struct list_head **list, int *idx,
                                 void *ptr, char *type);
 int parse_events_add_pmu(struct list_head **list, int *idx,
                          char *pmu , struct list_head *head_config);
+void parse_events__set_leader(char *name, struct list_head *list);
 void parse_events_update_lists(struct list_head *list_event,
                                struct list_head *list_all);
 void parse_events_error(void *data, void *scanner, char const *msg);
 int parse_events__test(void);
 
-void print_events(const char *event_glob);
+void print_events(const char *event_glob, bool name_only);
 void print_events_type(u8 type);
-void print_tracepoint_events(const char *subsys_glob, const char *event_glob);
-int print_hwcache_events(const char *event_glob);
+void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
+                             bool name_only);
+int print_hwcache_events(const char *event_glob, bool name_only);
 extern int is_valid_tracepoint(const char *event_string);
 
 extern int valid_debugfs_mount(const char *debugfs);
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 384ca74c6b22..c87efc12579d 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -15,10 +15,10 @@ YYSTYPE *parse_events_get_lval(yyscan_t yyscanner);
 
 static int __value(YYSTYPE *yylval, char *str, int base, int token)
 {
-        long num;
+        u64 num;
 
         errno = 0;
-        num = strtoul(str, NULL, base);
+        num = strtoull(str, NULL, base);
         if (errno)
                 return PE_ERROR;
 
@@ -70,6 +70,12 @@ static int term(yyscan_t scanner, int type)
 %}
 
 %x mem
+%s config
+%x event
+
+group           [^,{}/]*[{][^}]*[}][^,{}/]*
+event_pmu       [^,{}/]+[/][^/]*[/][^,{}/]*
+event           [^,{}/]+
 
 num_dec         [0-9]+
 num_hex         0x[a-fA-F0-9]+
@@ -84,7 +90,13 @@ modifier_bp	[rwx]{1,3}
         {
                 int start_token;
 
-                start_token = (int) parse_events_get_extra(yyscanner);
+                start_token = parse_events_get_extra(yyscanner);
+
+                if (start_token == PE_START_TERMS)
+                        BEGIN(config);
+                else if (start_token == PE_START_EVENTS)
+                        BEGIN(event);
+
                 if (start_token) {
                         parse_events_set_extra(NULL, yyscanner);
                         return start_token;
@@ -92,6 +104,26 @@ modifier_bp	[rwx]{1,3}
          }
 %}
 
+<event>{
+
+{group}         {
+                        BEGIN(INITIAL); yyless(0);
+                }
+
+{event_pmu}     |
+{event}         {
+                        str(yyscanner, PE_EVENT_NAME);
+                        BEGIN(INITIAL); yyless(0);
+                        return PE_EVENT_NAME;
+                }
+
+.               |
+<<EOF>>         {
+                        BEGIN(INITIAL); yyless(0);
+                }
+
+}
+
 cpu-cycles|cycles                               { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_CPU_CYCLES); }
 stalled-cycles-frontend|idle-cycles-frontend    { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND); }
 stalled-cycles-backend|idle-cycles-backend      { return sym(yyscanner, PERF_TYPE_HARDWARE, PERF_COUNT_HW_STALLED_CYCLES_BACKEND); }
@@ -127,18 +159,16 @@ speculative-read|speculative-load	|
 refs|Reference|ops|access               |
 misses|miss                             { return str(yyscanner, PE_NAME_CACHE_OP_RESULT); }
 
-        /*
-         * These are event config hardcoded term names to be specified
-         * within xxx/.../ syntax. So far we dont clash with other names,
-         * so we can put them here directly. In case the we have a conflict
-         * in future, this needs to go into '//' condition block.
-         */
+<config>{
 config                  { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG); }
 config1                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG1); }
 config2                 { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_CONFIG2); }
 name                    { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_NAME); }
 period                  { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD); }
 branch_type             { return term(yyscanner, PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE); }
+,                       { return ','; }
+"/"                     { BEGIN(INITIAL); return '/'; }
+}
 
 mem:                    { BEGIN(mem); return PE_PREFIX_MEM; }
 r{num_raw_hex}          { return raw(yyscanner); }
@@ -147,10 +177,12 @@ r{num_raw_hex}		{ return raw(yyscanner); }
 
 {modifier_event}        { return str(yyscanner, PE_MODIFIER_EVENT); }
 {name}                  { return str(yyscanner, PE_NAME); }
-"/"                     { return '/'; }
+"/"                     { BEGIN(config); return '/'; }
 -                       { return '-'; }
-,                       { return ','; }
+,                       { BEGIN(event); return ','; }
 :                       { return ':'; }
+"{"                     { BEGIN(event); return '{'; }
+"}"                     { return '}'; }
 =                       { return '='; }
 \n                      { }
 
@@ -175,7 +207,7 @@ r{num_raw_hex}		{ return raw(yyscanner); }
 
 %%
 
-int parse_events_wrap(void *scanner __used)
+int parse_events_wrap(void *scanner __maybe_unused)
 {
         return 1;
 }
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 2bc5fbff2b5d..cd88209e3c58 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -27,10 +27,11 @@ do { \
 
 %token PE_START_EVENTS PE_START_TERMS
 %token PE_VALUE PE_VALUE_SYM_HW PE_VALUE_SYM_SW PE_RAW PE_TERM
+%token PE_EVENT_NAME
 %token PE_NAME
 %token PE_MODIFIER_EVENT PE_MODIFIER_BP
 %token PE_NAME_CACHE_TYPE PE_NAME_CACHE_OP_RESULT
-%token PE_PREFIX_MEM PE_PREFIX_RAW
+%token PE_PREFIX_MEM PE_PREFIX_RAW PE_PREFIX_GROUP
 %token PE_ERROR
 %type <num> PE_VALUE
 %type <num> PE_VALUE_SYM_HW
@@ -42,6 +43,7 @@ do { \
 %type <str> PE_NAME_CACHE_OP_RESULT
 %type <str> PE_MODIFIER_EVENT
 %type <str> PE_MODIFIER_BP
+%type <str> PE_EVENT_NAME
 %type <num> value_sym
 %type <head> event_config
 %type <term> event_term
@@ -53,44 +55,125 @@ do { \
 %type <head> event_legacy_numeric
 %type <head> event_legacy_raw
 %type <head> event_def
+%type <head> event_mod
+%type <head> event_name
+%type <head> event
+%type <head> events
+%type <head> group_def
+%type <head> group
+%type <head> groups
 
 %union
 {
         char *str;
-        unsigned long num;
+        u64 num;
         struct list_head *head;
         struct parse_events__term *term;
 }
 %%
 
 start:
-PE_START_EVENTS events
+PE_START_EVENTS start_events
 |
-PE_START_TERMS  terms
+PE_START_TERMS  start_terms
+
+start_events: groups
+{
+        struct parse_events_data__events *data = _data;
+
+        parse_events_update_lists($1, &data->list);
+}
+
+groups:
+groups ',' group
+{
+        struct list_head *list  = $1;
+        struct list_head *group = $3;
+
+        parse_events_update_lists(group, list);
+        $$ = list;
+}
+|
+groups ',' event
+{
+        struct list_head *list  = $1;
+        struct list_head *event = $3;
+
+        parse_events_update_lists(event, list);
+        $$ = list;
+}
+|
+group
+|
+event
+
+group:
+group_def ':' PE_MODIFIER_EVENT
+{
+        struct list_head *list = $1;
+
+        ABORT_ON(parse_events__modifier_group(list, $3));
+        $$ = list;
+}
+|
+group_def
+
+group_def:
+PE_NAME '{' events '}'
+{
+        struct list_head *list = $3;
+
+        parse_events__set_leader($1, list);
+        $$ = list;
+}
+|
+'{' events '}'
+{
+        struct list_head *list = $2;
+
+        parse_events__set_leader(NULL, list);
+        $$ = list;
+}
 
 events:
-events ',' event | event
+events ',' event
+{
+        struct list_head *event = $3;
+        struct list_head *list  = $1;
 
-event:
-event_def PE_MODIFIER_EVENT
+        parse_events_update_lists(event, list);
+        $$ = list;
+}
+|
+event
+
+event: event_mod
+
+event_mod:
+event_name PE_MODIFIER_EVENT
 {
-        struct parse_events_data__events *data = _data;
+        struct list_head *list = $1;
 
         /*
          * Apply modifier on all events added by single event definition
          * (there could be more events added for multiple tracepoint
          * definitions via '*?'.
          */
-        ABORT_ON(parse_events_modifier($1, $2));
-        parse_events_update_lists($1, &data->list);
+        ABORT_ON(parse_events__modifier_event(list, $2, false));
+        $$ = list;
 }
 |
-event_def
-{
-        struct parse_events_data__events *data = _data;
+event_name
 
-        parse_events_update_lists($1, &data->list);
+event_name:
+PE_EVENT_NAME event_def
+{
+        ABORT_ON(parse_events_name($2, $1));
+        free($1);
+        $$ = $2;
 }
+|
+event_def
 
 event_def: event_pmu |
            event_legacy_symbol |
@@ -207,7 +290,7 @@ PE_VALUE ':' PE_VALUE
         struct parse_events_data__events *data = _data;
         struct list_head *list = NULL;
 
-        ABORT_ON(parse_events_add_numeric(&list, &data->idx, $1, $3, NULL));
+        ABORT_ON(parse_events_add_numeric(&list, &data->idx, (u32)$1, $3, NULL));
         $$ = list;
 }
 
@@ -222,7 +305,7 @@ PE_RAW
         $$ = list;
 }
 
-terms: event_config
+start_terms: event_config
 {
         struct parse_events_data__terms *data = _data;
         data->terms = $1;
@@ -282,7 +365,7 @@ PE_TERM '=' PE_NAME
 {
         struct parse_events__term *term;
 
-        ABORT_ON(parse_events__term_str(&term, $1, NULL, $3));
+        ABORT_ON(parse_events__term_str(&term, (int)$1, NULL, $3));
         $$ = term;
 }
 |
@@ -290,7 +373,7 @@ PE_TERM '=' PE_VALUE
 {
         struct parse_events__term *term;
 
-        ABORT_ON(parse_events__term_num(&term, $1, NULL, $3));
+        ABORT_ON(parse_events__term_num(&term, (int)$1, NULL, $3));
         $$ = term;
 }
 |
@@ -298,7 +381,7 @@ PE_TERM
 {
         struct parse_events__term *term;
 
-        ABORT_ON(parse_events__term_num(&term, $1, NULL, 1));
+        ABORT_ON(parse_events__term_num(&term, (int)$1, NULL, 1));
         $$ = term;
 }
 
@@ -308,7 +391,7 @@ sep_slash_dc: '/' | ':' |
 
 %%
 
-void parse_events_error(void *data __used, void *scanner __used,
-                        char const *msg __used)
+void parse_events_error(void *data __maybe_unused, void *scanner __maybe_unused,
+                        char const *msg __maybe_unused)
 {
 }
diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c
index 594f8fad5ecd..443fc116512b 100644
--- a/tools/perf/util/parse-options.c
+++ b/tools/perf/util/parse-options.c
@@ -557,7 +557,8 @@ int parse_options_usage(const char * const *usagestr,
 }
 
 
-int parse_opt_verbosity_cb(const struct option *opt, const char *arg __used,
+int parse_opt_verbosity_cb(const struct option *opt,
+                           const char *arg __maybe_unused,
                            int unset)
 {
         int *target = opt->value;
diff --git a/tools/perf/util/perf_regs.h b/tools/perf/util/perf_regs.h
new file mode 100644
index 000000000000..316dbe7f86ed
--- /dev/null
+++ b/tools/perf/util/perf_regs.h
@@ -0,0 +1,14 @@
+#ifndef __PERF_REGS_H
+#define __PERF_REGS_H
+
+#ifndef NO_PERF_REGS
+#include <perf_regs.h>
+#else
+#define PERF_REGS_MASK  0
+
+static inline const char *perf_reg_name(int id __maybe_unused)
+{
+        return NULL;
+}
+#endif /* NO_PERF_REGS */
+#endif /* __PERF_REGS_H */
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 67715a42cd6d..8a2229da594f 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -9,6 +9,9 @@
 #include "util.h"
 #include "pmu.h"
 #include "parse-events.h"
+#include "cpumap.h"
+
+#define EVENT_SOURCE_DEVICE_PATH "/bus/event_source/devices/"
 
 int perf_pmu_parse(struct list_head *list, char *name);
 extern FILE *perf_pmu_in;
@@ -69,7 +72,7 @@ static int pmu_format(char *name, struct list_head *format)
                 return -1;
 
         snprintf(path, PATH_MAX,
-                 "%s/bus/event_source/devices/%s/format", sysfs, name);
+                 "%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
 
         if (stat(path, &st) < 0)
                 return 0;       /* no error if format does not exist */
@@ -206,7 +209,7 @@ static int pmu_type(char *name, __u32 *type)
                 return -1;
 
         snprintf(path, PATH_MAX,
-                 "%s/bus/event_source/devices/%s/type", sysfs, name);
+                 "%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name);
 
         if (stat(path, &st) < 0)
                 return -1;
@@ -222,6 +225,62 @@ static int pmu_type(char *name, __u32 *type)
         return ret;
 }
 
+/* Add all pmus in sysfs to pmu list: */
+static void pmu_read_sysfs(void)
+{
+        char path[PATH_MAX];
+        const char *sysfs;
+        DIR *dir;
+        struct dirent *dent;
+
+        sysfs = sysfs_find_mountpoint();
+        if (!sysfs)
+                return;
+
+        snprintf(path, PATH_MAX,
+                 "%s" EVENT_SOURCE_DEVICE_PATH, sysfs);
+
+        dir = opendir(path);
+        if (!dir)
+                return;
+
+        while ((dent = readdir(dir))) {
+                if (!strcmp(dent->d_name, ".") || !strcmp(dent->d_name, ".."))
+                        continue;
+                /* add to static LIST_HEAD(pmus): */
+                perf_pmu__find(dent->d_name);
+        }
+
+        closedir(dir);
+}
+
+static struct cpu_map *pmu_cpumask(char *name)
+{
+        struct stat st;
+        char path[PATH_MAX];
+        const char *sysfs;
+        FILE *file;
+        struct cpu_map *cpus;
+
+        sysfs = sysfs_find_mountpoint();
+        if (!sysfs)
+                return NULL;
+
+        snprintf(path, PATH_MAX,
+                 "%s/bus/event_source/devices/%s/cpumask", sysfs, name);
+
+        if (stat(path, &st) < 0)
+                return NULL;
+
+        file = fopen(path, "r");
+        if (!file)
+                return NULL;
+
+        cpus = cpu_map__read(file);
+        fclose(file);
+        return cpus;
+}
+
 static struct perf_pmu *pmu_lookup(char *name)
 {
         struct perf_pmu *pmu;
@@ -244,6 +303,8 @@ static struct perf_pmu *pmu_lookup(char *name)
         if (!pmu)
                 return NULL;
 
+        pmu->cpus = pmu_cpumask(name);
+
         pmu_aliases(name, &aliases);
 
         INIT_LIST_HEAD(&pmu->format);
@@ -267,6 +328,21 @@ static struct perf_pmu *pmu_find(char *name)
         return NULL;
 }
 
+struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu)
+{
+        /*
+         * pmu iterator: If pmu is NULL, we start at the begin,
+         * otherwise return the next pmu. Returns NULL on end.
+         */
+        if (!pmu) {
+                pmu_read_sysfs();
+                pmu = list_prepare_entry(pmu, &pmus, list);
+        }
+        list_for_each_entry_continue(pmu, &pmus, list)
+                return pmu;
+        return NULL;
+}
+
 struct perf_pmu *perf_pmu__find(char *name)
 {
         struct perf_pmu *pmu;
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 535f2c5258ab..53c7794fc4be 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -28,6 +28,7 @@ struct perf_pmu__alias {
 struct perf_pmu {
         char *name;
         __u32 type;
+        struct cpu_map *cpus;
         struct list_head format;
         struct list_head aliases;
         struct list_head list;
@@ -46,5 +47,7 @@ int perf_pmu__new_format(struct list_head *list, char *name,
                          int config, unsigned long *bits);
 void perf_pmu__set_format(unsigned long *bits, long from, long to);
 
+struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu);
+
 int perf_pmu__test(void);
 #endif /* __PMU_H */
diff --git a/tools/perf/util/pmu.y b/tools/perf/util/pmu.y
index 20ea77e93169..ec898047ebb9 100644
--- a/tools/perf/util/pmu.y
+++ b/tools/perf/util/pmu.y
@@ -86,8 +86,8 @@ PP_VALUE
 
 %%
 
-void perf_pmu_error(struct list_head *list __used,
-                    char *name __used,
-                    char const *msg __used)
+void perf_pmu_error(struct list_head *list __maybe_unused,
+                    char *name __maybe_unused,
+                    char const *msg __maybe_unused)
 {
 }
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 0dda25d82d06..49a256e6e0a2 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -41,7 +41,7 @@
 #include "symbol.h"
 #include "thread.h"
 #include "debugfs.h"
-#include "trace-event.h"        /* For __unused */
+#include "trace-event.h"        /* For __maybe_unused */
 #include "probe-event.h"
 #include "probe-finder.h"
 #include "session.h"
@@ -647,8 +647,8 @@ static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
 }
 
 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
-                                struct probe_trace_event **tevs __unused,
-                                int max_tevs __unused, const char *target)
+                                struct probe_trace_event **tevs __maybe_unused,
+                                int max_tevs __maybe_unused, const char *target)
 {
         if (perf_probe_event_need_dwarf(pev)) {
                 pr_warning("Debuginfo-analysis is not supported.\n");
@@ -661,17 +661,18 @@ static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
         return 0;
 }
 
-int show_line_range(struct line_range *lr __unused, const char *module __unused)
+int show_line_range(struct line_range *lr __maybe_unused,
+                    const char *module __maybe_unused)
 {
         pr_warning("Debuginfo-analysis is not supported.\n");
         return -ENOSYS;
 }
 
-int show_available_vars(struct perf_probe_event *pevs __unused,
-                        int npevs __unused, int max_vls __unused,
-                        const char *module __unused,
-                        struct strfilter *filter __unused,
-                        bool externs __unused)
+int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
+                        int npevs __maybe_unused, int max_vls __maybe_unused,
+                        const char *module __maybe_unused,
+                        struct strfilter *filter __maybe_unused,
+                        bool externs __maybe_unused)
 {
         pr_warning("Debuginfo-analysis is not supported.\n");
         return -ENOSYS;
@@ -1099,6 +1100,7 @@ static int parse_probe_trace_command(const char *cmd,
         struct probe_trace_point *tp = &tev->point;
         char pr;
         char *p;
+        char *argv0_str = NULL, *fmt, *fmt1_str, *fmt2_str, *fmt3_str;
         int ret, i, argc;
         char **argv;
 
@@ -1115,14 +1117,27 @@ static int parse_probe_trace_command(const char *cmd,
         }
 
         /* Scan event and group name. */
-        ret = sscanf(argv[0], "%c:%a[^/ \t]/%a[^ \t]",
-                     &pr, (float *)(void *)&tev->group,
-                     (float *)(void *)&tev->event);
-        if (ret != 3) {
+        argv0_str = strdup(argv[0]);
+        if (argv0_str == NULL) {
+                ret = -ENOMEM;
+                goto out;
+        }
+        fmt1_str = strtok_r(argv0_str, ":", &fmt);
+        fmt2_str = strtok_r(NULL, "/", &fmt);
+        fmt3_str = strtok_r(NULL, " \t", &fmt);
+        if (fmt1_str == NULL || strlen(fmt1_str) != 1 || fmt2_str == NULL
+            || fmt3_str == NULL) {
                 semantic_error("Failed to parse event name: %s\n", argv[0]);
                 ret = -EINVAL;
                 goto out;
         }
+        pr = fmt1_str[0];
+        tev->group = strdup(fmt2_str);
+        tev->event = strdup(fmt3_str);
+        if (tev->group == NULL || tev->event == NULL) {
+                ret = -ENOMEM;
+                goto out;
+        }
         pr_debug("Group:%s Event:%s probe:%c\n", tev->group, tev->event, pr);
 
         tp->retprobe = (pr == 'r');
@@ -1134,10 +1149,17 @@ static int parse_probe_trace_command(const char *cmd,
                 p++;
         } else
                 p = argv[1];
-        ret = sscanf(p, "%a[^+]+%lu", (float *)(void *)&tp->symbol,
-                     &tp->offset);
-        if (ret == 1)
+        fmt1_str = strtok_r(p, "+", &fmt);
+        tp->symbol = strdup(fmt1_str);
+        if (tp->symbol == NULL) {
+                ret = -ENOMEM;
+                goto out;
+        }
+        fmt2_str = strtok_r(NULL, "", &fmt);
+        if (fmt2_str == NULL)
                 tp->offset = 0;
+        else
+                tp->offset = strtoul(fmt2_str, NULL, 10);
 
         tev->nargs = argc - 2;
         tev->args = zalloc(sizeof(struct probe_trace_arg) * tev->nargs);
@@ -1161,6 +1183,7 @@ static int parse_probe_trace_command(const char *cmd,
         }
         ret = 0;
 out:
+        free(argv0_str);
         argv_free(argv);
         return ret;
 }
@@ -2183,7 +2206,7 @@ static struct strfilter *available_func_filter;
  * If a symbol corresponds to a function with global binding and
  * matches filter return 0. For all others return 1.
  */
-static int filter_available_functions(struct map *map __unused,
+static int filter_available_functions(struct map *map __maybe_unused,
                                       struct symbol *sym)
 {
         if (sym->binding == STB_GLOBAL &&
@@ -2307,10 +2330,17 @@ static int convert_name_to_addr(struct perf_probe_event *pev, const char *exec)
                 function = NULL;
         }
         if (!pev->group) {
-                char *ptr1, *ptr2;
+                char *ptr1, *ptr2, *exec_copy;
 
                 pev->group = zalloc(sizeof(char *) * 64);
-                ptr1 = strdup(basename(exec));
+                exec_copy = strdup(exec);
+                if (!exec_copy) {
+                        ret = -ENOMEM;
+                        pr_warning("Failed to copy exec string.\n");
+                        goto out;
+                }
+
+                ptr1 = strdup(basename(exec_copy));
                 if (ptr1) {
                         ptr2 = strpbrk(ptr1, "-._");
                         if (ptr2)
@@ -2319,6 +2349,7 @@ static int convert_name_to_addr(struct perf_probe_event *pev, const char *exec)
                                         ptr1);
                         free(ptr1);
                 }
+                free(exec_copy);
         }
         free(pp->function);
         pp->function = zalloc(sizeof(char *) * MAX_PROBE_ARGS);
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index d448984ed789..1daf5c14e751 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -207,7 +207,7 @@ static int debuginfo__init_online_kernel_dwarf(struct debuginfo *self,
 #else
 /* With older elfutils, this just support kernel module... */
 static int debuginfo__init_online_kernel_dwarf(struct debuginfo *self,
-                                               Dwarf_Addr addr __used)
+                                               Dwarf_Addr addr __maybe_unused)
 {
         const char *path = kernel_get_module_path("kernel");
 
@@ -525,8 +525,10 @@ static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname,
                         return -ENOENT;
                 }
                 /* Verify it is a data structure  */
-                if (dwarf_tag(&type) != DW_TAG_structure_type) {
-                        pr_warning("%s is not a data structure.\n", varname);
+                tag = dwarf_tag(&type);
+                if (tag != DW_TAG_structure_type && tag != DW_TAG_union_type) {
+                        pr_warning("%s is not a data structure nor an union.\n",
+                                   varname);
                         return -EINVAL;
                 }
 
@@ -539,8 +541,9 @@ static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname,
                         *ref_ptr = ref;
         } else {
                 /* Verify it is a data structure  */
-                if (tag != DW_TAG_structure_type) {
-                        pr_warning("%s is not a data structure.\n", varname);
+                if (tag != DW_TAG_structure_type && tag != DW_TAG_union_type) {
+                        pr_warning("%s is not a data structure nor an union.\n",
+                                   varname);
                         return -EINVAL;
                 }
                 if (field->name[0] == '[') {
@@ -567,10 +570,15 @@ static int convert_variable_fields(Dwarf_Die *vr_die, const char *varname,
         }
 
         /* Get the offset of the field */
-        ret = die_get_data_member_location(die_mem, &offs);
-        if (ret < 0) {
-                pr_warning("Failed to get the offset of %s.\n", field->name);
-                return ret;
+        if (tag == DW_TAG_union_type) {
+                offs = 0;
+        } else {
+                ret = die_get_data_member_location(die_mem, &offs);
+                if (ret < 0) {
+                        pr_warning("Failed to get the offset of %s.\n",
+                                   field->name);
+                        return ret;
+                }
         }
         ref->offset += (long)offs;
 
@@ -1419,7 +1427,7 @@ static int line_range_add_line(const char *src, unsigned int lineno,
 }
 
 static int line_range_walk_cb(const char *fname, int lineno,
-                              Dwarf_Addr addr __used,
+                              Dwarf_Addr addr __maybe_unused,
                               void *data)
 {
         struct line_finder *lf = data;
diff --git a/tools/perf/util/python-ext-sources b/tools/perf/util/python-ext-sources
index 213362850abd..c40c2d33199e 100644
--- a/tools/perf/util/python-ext-sources
+++ b/tools/perf/util/python-ext-sources
@@ -1,5 +1,5 @@
 #
-# List of files needed by perf python extention
+# List of files needed by perf python extension
 #
 # Each source file must be placed on its own line so that it can be
 # processed by Makefile and util/setup.py accordingly.
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 0688bfb6d280..9181bf212fb9 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -627,7 +627,7 @@ static PyObject *pyrf_evsel__open(struct pyrf_evsel *pevsel,
          * This will group just the fds for this single evsel, to group
          * multiple events, use evlist.open().
          */
-        if (perf_evsel__open(evsel, cpus, threads, group, NULL) < 0) {
+        if (perf_evsel__open(evsel, cpus, threads) < 0) {
                 PyErr_SetFromErrno(PyExc_OSError);
                 return NULL;
         }
@@ -672,7 +672,7 @@ struct pyrf_evlist {
 };
 
 static int pyrf_evlist__init(struct pyrf_evlist *pevlist,
-                             PyObject *args, PyObject *kwargs __used)
+                             PyObject *args, PyObject *kwargs __maybe_unused)
 {
         PyObject *pcpus = NULL, *pthreads = NULL;
         struct cpu_map *cpus;
@@ -733,7 +733,8 @@ static PyObject *pyrf_evlist__poll(struct pyrf_evlist *pevlist,
 }
 
 static PyObject *pyrf_evlist__get_pollfd(struct pyrf_evlist *pevlist,
-                                         PyObject *args __used, PyObject *kwargs __used)
+                                         PyObject *args __maybe_unused,
+                                         PyObject *kwargs __maybe_unused)
 {
         struct perf_evlist *evlist = &pevlist->evlist;
         PyObject *list = PyList_New(0);
@@ -765,7 +766,8 @@ free_list:
 
 
 static PyObject *pyrf_evlist__add(struct pyrf_evlist *pevlist,
-                                  PyObject *args, PyObject *kwargs __used)
+                                  PyObject *args,
+                                  PyObject *kwargs __maybe_unused)
 {
         struct perf_evlist *evlist = &pevlist->evlist;
         PyObject *pevsel;
@@ -803,7 +805,7 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
                 if (pyevent == NULL)
                         return PyErr_NoMemory();
 
-                err = perf_evlist__parse_sample(evlist, event, &pevent->sample, false);
+                err = perf_evlist__parse_sample(evlist, event, &pevent->sample);
                 if (err)
                         return PyErr_Format(PyExc_OSError,
                                             "perf: can't parse sample, err=%d", err);
@@ -824,7 +826,10 @@ static PyObject *pyrf_evlist__open(struct pyrf_evlist *pevlist,
         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|OOii", kwlist, &group))
                 return NULL;
 
-        if (perf_evlist__open(evlist, group) < 0) {
+        if (group)
+                perf_evlist__set_leader(evlist);
+
+        if (perf_evlist__open(evlist) < 0) {
                 PyErr_SetFromErrno(PyExc_OSError);
                 return NULL;
         }
diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
index 02dfa19a467f..f80605eb1855 100644
--- a/tools/perf/util/scripting-engines/trace-event-perl.c
+++ b/tools/perf/util/scripting-engines/trace-event-perl.c
@@ -25,16 +25,16 @@
 #include <ctype.h>
 #include <errno.h>
 
-#include "../../perf.h"
 #include "../util.h"
+#include <EXTERN.h>
+#include <perl.h>
+
+#include "../../perf.h"
 #include "../thread.h"
 #include "../event.h"
 #include "../trace-event.h"
 #include "../evsel.h"
 
-#include <EXTERN.h>
-#include <perl.h>
-
 void boot_Perf__Trace__Context(pTHX_ CV *cv);
 void boot_DynaLoader(pTHX_ CV *cv);
 typedef PerlInterpreter * INTERP;
@@ -237,16 +237,16 @@ static void define_event_symbols(struct event_format *event,
                 define_event_symbols(event, ev_name, args->next);
 }
 
-static inline
-struct event_format *find_cache_event(struct pevent *pevent, int type)
+static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
 {
         static char ev_name[256];
         struct event_format *event;
+        int type = evsel->attr.config;
 
         if (events[type])
                 return events[type];
 
-        events[type] = event = pevent_find_event(pevent, type);
+        events[type] = event = evsel->tp_format;
         if (!event)
                 return NULL;
 
@@ -257,23 +257,22 @@ struct event_format *find_cache_event(struct pevent *pevent, int type)
         return event;
 }
 
-static void perl_process_tracepoint(union perf_event *perf_event __unused,
-                                    struct pevent *pevent,
+static void perl_process_tracepoint(union perf_event *perf_event __maybe_unused,
                                     struct perf_sample *sample,
                                     struct perf_evsel *evsel,
-                                    struct machine *machine __unused,
-                                    struct thread *thread)
+                                    struct machine *machine __maybe_unused,
+                                    struct addr_location *al)
 {
         struct format_field *field;
         static char handler[256];
         unsigned long long val;
         unsigned long s, ns;
         struct event_format *event;
-        int type;
         int pid;
         int cpu = sample->cpu;
         void *data = sample->raw_data;
         unsigned long long nsecs = sample->time;
+        struct thread *thread = al->thread;
         char *comm = thread->comm;
 
         dSP;
@@ -281,13 +280,11 @@ static void perl_process_tracepoint(union perf_event *perf_event __unused,
         if (evsel->attr.type != PERF_TYPE_TRACEPOINT)
                 return;
 
-        type = trace_parse_common_type(pevent, data);
-
-        event = find_cache_event(pevent, type);
+        event = find_cache_event(evsel);
         if (!event)
-                die("ug! no event found for type %d", type);
+                die("ug! no event found for type %" PRIu64, evsel->attr.config);
 
-        pid = trace_parse_common_pid(pevent, data);
+        pid = raw_field_value(event, "common_pid", data);
 
         sprintf(handler, "%s::%s", event->system, event->name);
 
@@ -320,7 +317,7 @@ static void perl_process_tracepoint(union perf_event *perf_event __unused,
                                 offset = field->offset;
                         XPUSHs(sv_2mortal(newSVpv((char *)data + offset, 0)));
                 } else { /* FIELD_IS_NUMERIC */
-                        val = read_size(pevent, data + field->offset,
+                        val = read_size(event, data + field->offset,
                                         field->size);
                         if (field->flags & FIELD_IS_SIGNED) {
                                 XPUSHs(sv_2mortal(newSViv(val)));
@@ -349,11 +346,11 @@ static void perl_process_tracepoint(union perf_event *perf_event __unused,
         LEAVE;
 }
 
-static void perl_process_event_generic(union perf_event *pevent __unused,
+static void perl_process_event_generic(union perf_event *event,
                                        struct perf_sample *sample,
-                                       struct perf_evsel *evsel __unused,
-                                       struct machine *machine __unused,
-                                       struct thread *thread __unused)
+                                       struct perf_evsel *evsel,
+                                       struct machine *machine __maybe_unused,
+                                       struct addr_location *al __maybe_unused)
 {
         dSP;
 
@@ -363,7 +360,7 @@ static void perl_process_event_generic(union perf_event *pevent __unused,
         ENTER;
         SAVETMPS;
         PUSHMARK(SP);
-        XPUSHs(sv_2mortal(newSVpvn((const char *)pevent, pevent->header.size)));
+        XPUSHs(sv_2mortal(newSVpvn((const char *)event, event->header.size)));
         XPUSHs(sv_2mortal(newSVpvn((const char *)&evsel->attr, sizeof(evsel->attr))));
         XPUSHs(sv_2mortal(newSVpvn((const char *)sample, sizeof(*sample))));
         XPUSHs(sv_2mortal(newSVpvn((const char *)sample->raw_data, sample->raw_size)));
@@ -376,14 +373,13 @@ static void perl_process_event_generic(union perf_event *pevent __unused,
 }
 
 static void perl_process_event(union perf_event *event,
-                               struct pevent *pevent,
                                struct perf_sample *sample,
                                struct perf_evsel *evsel,
                                struct machine *machine,
-                               struct thread *thread)
+                               struct addr_location *al)
 {
-        perl_process_tracepoint(event, pevent, sample, evsel, machine, thread);
-        perl_process_event_generic(event, sample, evsel, machine, thread);
+        perl_process_tracepoint(event, sample, evsel, machine, al);
+        perl_process_event_generic(event, sample, evsel, machine, al);
 }
 
 static void run_start_sub(void)
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index ce4d1b0c3862..730c6630cba5 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -27,10 +27,12 @@
 #include <errno.h>
 
 #include "../../perf.h"
+#include "../evsel.h"
 #include "../util.h"
 #include "../event.h"
 #include "../thread.h"
 #include "../trace-event.h"
+#include "../evsel.h"
 
 PyMODINIT_FUNC initperf_trace_context(void);
 
@@ -194,16 +196,21 @@ static void define_event_symbols(struct event_format *event,
                 define_event_symbols(event, ev_name, args->next);
 }
 
-static inline
-struct event_format *find_cache_event(struct pevent *pevent, int type)
+static inline struct event_format *find_cache_event(struct perf_evsel *evsel)
 {
         static char ev_name[256];
         struct event_format *event;
+        int type = evsel->attr.config;
 
+        /*
+         * XXX: Do we really need to cache this since now we have evsel->tp_format
+         * cached already? Need to re-read this "cache" routine that as well calls
+         * define_event_symbols() :-\
+         */
         if (events[type])
                 return events[type];
 
-        events[type] = event = pevent_find_event(pevent, type);
+        events[type] = event = evsel->tp_format;
         if (!event)
                 return NULL;
 
@@ -214,12 +221,12 @@ struct event_format *find_cache_event(struct pevent *pevent, int type)
         return event;
 }
 
-static void python_process_event(union perf_event *perf_event __unused,
-                                 struct pevent *pevent,
+static void python_process_tracepoint(union perf_event *perf_event
+                                      __maybe_unused,
                                  struct perf_sample *sample,
-                                 struct perf_evsel *evsel __unused,
-                                 struct machine *machine __unused,
-                                 struct thread *thread)
+                                 struct perf_evsel *evsel,
+                                 struct machine *machine __maybe_unused,
+                                 struct addr_location *al)
 {
         PyObject *handler, *retval, *context, *t, *obj, *dict = NULL;
         static char handler_name[256];
@@ -228,24 +235,22 @@ static void python_process_event(union perf_event *perf_event __unused,
         unsigned long s, ns;
         struct event_format *event;
         unsigned n = 0;
-        int type;
         int pid;
         int cpu = sample->cpu;
         void *data = sample->raw_data;
         unsigned long long nsecs = sample->time;
+        struct thread *thread = al->thread;
         char *comm = thread->comm;
 
         t = PyTuple_New(MAX_FIELDS);
         if (!t)
                 Py_FatalError("couldn't create Python tuple");
 
-        type = trace_parse_common_type(pevent, data);
-
-        event = find_cache_event(pevent, type);
+        event = find_cache_event(evsel);
         if (!event)
-                die("ug! no event found for type %d", type);
+                die("ug! no event found for type %d", (int)evsel->attr.config);
 
-        pid = trace_parse_common_pid(pevent, data);
+        pid = raw_field_value(event, "common_pid", data);
 
         sprintf(handler_name, "%s__%s", event->system, event->name);
 
@@ -290,7 +295,7 @@ static void python_process_event(union perf_event *perf_event __unused,
                                 offset = field->offset;
                         obj = PyString_FromString((char *)data + offset);
                 } else { /* FIELD_IS_NUMERIC */
-                        val = read_size(pevent, data + field->offset,
+                        val = read_size(event, data + field->offset,
                                         field->size);
                         if (field->flags & FIELD_IS_SIGNED) {
                                 if ((long long)val >= LONG_MIN &&
@@ -335,6 +340,84 @@ static void python_process_event(union perf_event *perf_event __unused,
         Py_DECREF(t);
 }
 
+static void python_process_general_event(union perf_event *perf_event
+                                         __maybe_unused,
+                                         struct perf_sample *sample,
+                                         struct perf_evsel *evsel,
+                                         struct machine *machine __maybe_unused,
+                                         struct addr_location *al)
+{
+        PyObject *handler, *retval, *t, *dict;
+        static char handler_name[64];
+        unsigned n = 0;
+        struct thread *thread = al->thread;
+
+        /*
+         * Use the MAX_FIELDS to make the function expandable, though
+         * currently there is only one item for the tuple.
+         */
+        t = PyTuple_New(MAX_FIELDS);
+        if (!t)
+                Py_FatalError("couldn't create Python tuple");
+
+        dict = PyDict_New();
+        if (!dict)
+                Py_FatalError("couldn't create Python dictionary");
+
+        snprintf(handler_name, sizeof(handler_name), "%s", "process_event");
+
+        handler = PyDict_GetItemString(main_dict, handler_name);
+        if (!handler || !PyCallable_Check(handler))
+                goto exit;
+
+        PyDict_SetItemString(dict, "ev_name", PyString_FromString(perf_evsel__name(evsel)));
+        PyDict_SetItemString(dict, "attr", PyString_FromStringAndSize(
+                        (const char *)&evsel->attr, sizeof(evsel->attr)));
+        PyDict_SetItemString(dict, "sample", PyString_FromStringAndSize(
+                        (const char *)sample, sizeof(*sample)));
+        PyDict_SetItemString(dict, "raw_buf", PyString_FromStringAndSize(
+                        (const char *)sample->raw_data, sample->raw_size));
+        PyDict_SetItemString(dict, "comm",
+                        PyString_FromString(thread->comm));
+        if (al->map) {
+                PyDict_SetItemString(dict, "dso",
+                        PyString_FromString(al->map->dso->name));
+        }
+        if (al->sym) {
+                PyDict_SetItemString(dict, "symbol",
+                        PyString_FromString(al->sym->name));
+        }
+
+        PyTuple_SetItem(t, n++, dict);
+        if (_PyTuple_Resize(&t, n) == -1)
+                Py_FatalError("error resizing Python tuple");
+
+        retval = PyObject_CallObject(handler, t);
+        if (retval == NULL)
+                handler_call_die(handler_name);
+exit:
+        Py_DECREF(dict);
+        Py_DECREF(t);
+}
+
+static void python_process_event(union perf_event *perf_event,
+                                 struct perf_sample *sample,
+                                 struct perf_evsel *evsel,
+                                 struct machine *machine,
+                                 struct addr_location *al)
+{
+        switch (evsel->attr.type) {
+        case PERF_TYPE_TRACEPOINT:
+                python_process_tracepoint(perf_event, sample, evsel,
+                                          machine, al);
+                break;
+        /* Reserve for future process_hw/sw/raw APIs */
+        default:
+                python_process_general_event(perf_event, sample, evsel,
+                                             machine, al);
+        }
+}
+
 static int run_start_sub(void)
 {
         PyObject *handler, *retval;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 2437fb0b463a..8cdd23239c90 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -15,6 +15,9 @@
 #include "util.h"
 #include "cpumap.h"
 #include "event-parse.h"
+#include "perf_regs.h"
+#include "unwind.h"
+#include "vdso.h"
 
 static int perf_session__open(struct perf_session *self, bool force)
 {
@@ -209,6 +212,7 @@ void perf_session__delete(struct perf_session *self)
         machine__exit(&self->host_machine);
         close(self->fd);
         free(self);
+        vdso__exit();
 }
 
 void machine__remove_thread(struct machine *self, struct thread *th)
@@ -288,10 +292,11 @@ struct branch_info *machine__resolve_bstack(struct machine *self,
         return bi;
 }
 
-int machine__resolve_callchain(struct machine *self,
-                               struct thread *thread,
-                               struct ip_callchain *chain,
-                               struct symbol **parent)
+static int machine__resolve_callchain_sample(struct machine *machine,
+                                             struct thread *thread,
+                                             struct ip_callchain *chain,
+                                             struct symbol **parent)
+
 {
         u8 cpumode = PERF_RECORD_MISC_USER;
         unsigned int i;
@@ -316,11 +321,14 @@ int machine__resolve_callchain(struct machine *self,
                 if (ip >= PERF_CONTEXT_MAX) {
                         switch (ip) {
                         case PERF_CONTEXT_HV:
-                                cpumode = PERF_RECORD_MISC_HYPERVISOR;  break;
+                                cpumode = PERF_RECORD_MISC_HYPERVISOR;
+                                break;
                         case PERF_CONTEXT_KERNEL:
-                                cpumode = PERF_RECORD_MISC_KERNEL;      break;
+                                cpumode = PERF_RECORD_MISC_KERNEL;
+                                break;
                         case PERF_CONTEXT_USER:
-                                cpumode = PERF_RECORD_MISC_USER;        break;
+                                cpumode = PERF_RECORD_MISC_USER;
+                                break;
                         default:
                                 pr_debug("invalid callchain context: "
                                          "%"PRId64"\n", (s64) ip);
@@ -335,7 +343,7 @@ int machine__resolve_callchain(struct machine *self,
                 }
 
                 al.filtered = false;
-                thread__find_addr_location(thread, self, cpumode,
+                thread__find_addr_location(thread, machine, cpumode,
                                            MAP__FUNCTION, ip, &al, NULL);
                 if (al.sym != NULL) {
                         if (sort__has_parent && !*parent &&
@@ -354,49 +362,92 @@ int machine__resolve_callchain(struct machine *self,
         return 0;
 }
 
-static int process_event_synth_tracing_data_stub(union perf_event *event __used,
-                                                 struct perf_session *session __used)
+static int unwind_entry(struct unwind_entry *entry, void *arg)
+{
+        struct callchain_cursor *cursor = arg;
+        return callchain_cursor_append(cursor, entry->ip,
+                                       entry->map, entry->sym);
+}
+
+int machine__resolve_callchain(struct machine *machine,
+                               struct perf_evsel *evsel,
+                               struct thread *thread,
+                               struct perf_sample *sample,
+                               struct symbol **parent)
+
+{
+        int ret;
+
+        callchain_cursor_reset(&callchain_cursor);
+
+        ret = machine__resolve_callchain_sample(machine, thread,
+                                                sample->callchain, parent);
+        if (ret)
+                return ret;
+
+        /* Can we do dwarf post unwind? */
+        if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) &&
+              (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER)))
+                return 0;
+
+        /* Bail out if nothing was captured. */
+        if ((!sample->user_regs.regs) ||
+            (!sample->user_stack.size))
+                return 0;
+
+        return unwind__get_entries(unwind_entry, &callchain_cursor, machine,
+                                   thread, evsel->attr.sample_regs_user,
+                                   sample);
+
+}
+
+static int process_event_synth_tracing_data_stub(union perf_event *event
+                                                 __maybe_unused,
+                                                 struct perf_session *session
+                                                __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
 }
 
-static int process_event_synth_attr_stub(union perf_event *event __used,
-                                         struct perf_evlist **pevlist __used)
+static int process_event_synth_attr_stub(union perf_event *event __maybe_unused,
+                                         struct perf_evlist **pevlist
+                                         __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
 }
 
-static int process_event_sample_stub(struct perf_tool *tool __used,
-                                     union perf_event *event __used,
-                                     struct perf_sample *sample __used,
-                                     struct perf_evsel *evsel __used,
-                                     struct machine *machine __used)
+static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
+                                     union perf_event *event __maybe_unused,
+                                     struct perf_sample *sample __maybe_unused,
+                                     struct perf_evsel *evsel __maybe_unused,
+                                     struct machine *machine __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
 }
 
-static int process_event_stub(struct perf_tool *tool __used,
-                              union perf_event *event __used,
-                              struct perf_sample *sample __used,
-                              struct machine *machine __used)
+static int process_event_stub(struct perf_tool *tool __maybe_unused,
+                              union perf_event *event __maybe_unused,
+                              struct perf_sample *sample __maybe_unused,
+                              struct machine *machine __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
 }
 
-static int process_finished_round_stub(struct perf_tool *tool __used,
-                                       union perf_event *event __used,
-                                       struct perf_session *perf_session __used)
+static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
+                                       union perf_event *event __maybe_unused,
+                                       struct perf_session *perf_session
+                                       __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
 }
 
-static int process_event_type_stub(struct perf_tool *tool __used,
-                                   union perf_event *event __used)
+static int process_event_type_stub(struct perf_tool *tool __maybe_unused,
+                                   union perf_event *event __maybe_unused)
 {
         dump_printf(": unhandled!\n");
         return 0;
@@ -473,7 +524,7 @@ static void swap_sample_id_all(union perf_event *event, void *data)
 }
 
 static void perf_event__all64_swap(union perf_event *event,
-                                   bool sample_id_all __used)
+                                   bool sample_id_all __maybe_unused)
 {
         struct perf_event_header *hdr = &event->header;
         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
@@ -487,7 +538,7 @@ static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
         if (sample_id_all) {
                 void *data = &event->comm.comm;
 
-                data += ALIGN(strlen(data) + 1, sizeof(u64));
+                data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
                 swap_sample_id_all(event, data);
         }
 }
@@ -504,7 +555,7 @@ static void perf_event__mmap_swap(union perf_event *event,
         if (sample_id_all) {
                 void *data = &event->mmap.filename;
 
-                data += ALIGN(strlen(data) + 1, sizeof(u64));
+                data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
                 swap_sample_id_all(event, data);
         }
 }
@@ -584,7 +635,7 @@ void perf_event__attr_swap(struct perf_event_attr *attr)
 }
 
 static void perf_event__hdr_attr_swap(union perf_event *event,
-                                      bool sample_id_all __used)
+                                      bool sample_id_all __maybe_unused)
 {
         size_t size;
 
@@ -596,14 +647,14 @@ static void perf_event__hdr_attr_swap(union perf_event *event,
 }
 
 static void perf_event__event_type_swap(union perf_event *event,
-                                        bool sample_id_all __used)
+                                        bool sample_id_all __maybe_unused)
 {
         event->event_type.event_type.event_id =
                 bswap_64(event->event_type.event_type.event_id);
 }
 
 static void perf_event__tracing_data_swap(union perf_event *event,
-                                          bool sample_id_all __used)
+                                          bool sample_id_all __maybe_unused)
 {
         event->tracing_data.size = bswap_32(event->tracing_data.size);
 }
@@ -652,7 +703,7 @@ static int perf_session_deliver_event(struct perf_session *session,
                                       struct perf_tool *tool,
                                       u64 file_offset);
 
-static void flush_sample_queue(struct perf_session *s,
+static int flush_sample_queue(struct perf_session *s,
                                struct perf_tool *tool)
 {
         struct ordered_samples *os = &s->ordered_samples;
@@ -665,19 +716,21 @@ static void flush_sample_queue(struct perf_session *s,
         int ret;
 
         if (!tool->ordered_samples || !limit)
-                return;
+                return 0;
 
         list_for_each_entry_safe(iter, tmp, head, list) {
                 if (iter->timestamp > limit)
                         break;
 
-                ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample,
-                                                s->header.needs_swap);
+                ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
                 if (ret)
                         pr_err("Can't parse sample, err = %d\n", ret);
-                else
-                        perf_session_deliver_event(s, iter->event, &sample, tool,
-                                                   iter->file_offset);
+                else {
+                        ret = perf_session_deliver_event(s, iter->event, &sample, tool,
+                                                         iter->file_offset);
+                        if (ret)
+                                return ret;
+                }
 
                 os->last_flush = iter->timestamp;
                 list_del(&iter->list);
@@ -697,6 +750,8 @@ static void flush_sample_queue(struct perf_session *s,
         }
 
         os->nr_samples = 0;
+
+        return 0;
 }
 
 /*
@@ -739,13 +794,14 @@ static void flush_sample_queue(struct perf_session *s,
  *      etc...
  */
 static int process_finished_round(struct perf_tool *tool,
-                                  union perf_event *event __used,
+                                  union perf_event *event __maybe_unused,
                                   struct perf_session *session)
 {
-        flush_sample_queue(session, tool);
-        session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
+        int ret = flush_sample_queue(session, tool);
+        if (!ret)
+                session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
 
-        return 0;
+        return ret;
 }
 
 /* The queue is ordered by time */
@@ -860,6 +916,34 @@ static void branch_stack__printf(struct perf_sample *sample)
                         sample->branch_stack->entries[i].to);
 }
 
+static void regs_dump__printf(u64 mask, u64 *regs)
+{
+        unsigned rid, i = 0;
+
+        for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
+                u64 val = regs[i++];
+
+                printf(".... %-5s 0x%" PRIx64 "\n",
+                       perf_reg_name(rid), val);
+        }
+}
+
+static void regs_user__printf(struct perf_sample *sample, u64 mask)
+{
+        struct regs_dump *user_regs = &sample->user_regs;
+
+        if (user_regs->regs) {
+                printf("... user regs: mask 0x%" PRIx64 "\n", mask);
+                regs_dump__printf(mask, user_regs->regs);
+        }
+}
+
+static void stack_user__printf(struct stack_dump *dump)
+{
+        printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
+               dump->size, dump->offset);
+}
+
 static void perf_session__print_tstamp(struct perf_session *session,
                                        union perf_event *event,
                                        struct perf_sample *sample)
@@ -897,7 +981,7 @@ static void dump_event(struct perf_session *session, union perf_event *event,
                event->header.size, perf_event__name(event->header.type));
 }
 
-static void dump_sample(struct perf_session *session, union perf_event *event,
+static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
                         struct perf_sample *sample)
 {
         u64 sample_type;
@@ -909,13 +993,19 @@ static void dump_sample(struct perf_session *session, union perf_event *event,
                event->header.misc, sample->pid, sample->tid, sample->ip,
                sample->period, sample->addr);
 
-        sample_type = perf_evlist__sample_type(session->evlist);
+        sample_type = evsel->attr.sample_type;
 
         if (sample_type & PERF_SAMPLE_CALLCHAIN)
                 callchain__printf(sample);
 
         if (sample_type & PERF_SAMPLE_BRANCH_STACK)
                 branch_stack__printf(sample);
+
+        if (sample_type & PERF_SAMPLE_REGS_USER)
+                regs_user__printf(sample, evsel->attr.sample_regs_user);
+
+        if (sample_type & PERF_SAMPLE_STACK_USER)
+                stack_user__printf(&sample->user_stack);
 }
 
 static struct machine *
@@ -973,7 +1063,7 @@ static int perf_session_deliver_event(struct perf_session *session,
 
         switch (event->header.type) {
         case PERF_RECORD_SAMPLE:
-                dump_sample(session, event, sample);
+                dump_sample(evsel, event, sample);
                 if (evsel == NULL) {
                         ++session->hists.stats.nr_unknown_id;
                         return 0;
@@ -1083,8 +1173,7 @@ static int perf_session__process_event(struct perf_session *session,
         /*
          * For all kernel events we get the sample data
          */
-        ret = perf_evlist__parse_sample(session->evlist, event, &sample,
-                                        session->header.needs_swap);
+        ret = perf_evlist__parse_sample(session->evlist, event, &sample);
         if (ret)
                 return ret;
 
@@ -1369,7 +1458,7 @@ more:
         err = 0;
         /* do the final flush for ordered samples */
         session->ordered_samples.next_flush = ULLONG_MAX;
-        flush_sample_queue(session, tool);
+        err = flush_sample_queue(session, tool);
 out_err:
         perf_session__warn_about_errors(session, tool);
         perf_session_free_sample_buffers(session);
@@ -1498,9 +1587,9 @@ struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
         return NULL;
 }
 
-void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
-                          struct machine *machine, int print_sym,
-                          int print_dso, int print_symoffset)
+void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
+                          struct perf_sample *sample, struct machine *machine,
+                          int print_sym, int print_dso, int print_symoffset)
 {
         struct addr_location al;
         struct callchain_cursor_node *node;
@@ -1514,8 +1603,9 @@ void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
 
         if (symbol_conf.use_callchain && sample->callchain) {
 
-                if (machine__resolve_callchain(machine, al.thread,
-                                                sample->callchain, NULL) != 0) {
+
+                if (machine__resolve_callchain(machine, evsel, al.thread,
+                                               sample, NULL) != 0) {
                         if (verbose)
                                 error("Failed to resolve callchain. Skipping\n");
                         return;
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 1f7ec87db7d7..aab414fbb64b 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -36,9 +36,7 @@ struct perf_session {
         struct pevent           *pevent;
         /*
          * FIXME: Need to split this up further, we need global
-         *        stats + per event stats. 'perf diff' also needs
-         *        to properly support multiple events in a single
-         *        perf.data file.
+         *        stats + per event stats.
          */
         struct hists            hists;
         int                     fd;
@@ -129,9 +127,9 @@ size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp);
 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
                                             unsigned int type);
 
-void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
-                          struct machine *machine, int print_sym,
-                          int print_dso, int print_symoffset);
+void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
+                          struct perf_sample *sample, struct machine *machine,
+                          int print_sym, int print_dso, int print_symoffset);
 
 int perf_session__cpu_bitmap(struct perf_session *session,
                              const char *cpu_list, unsigned long *cpu_bitmap);
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 0f5a0a496bc4..b5b1b9211960 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -8,12 +8,11 @@ const char	default_sort_order[] = "comm,dso,symbol";
 const char      *sort_order = default_sort_order;
 int             sort__need_collapse = 0;
 int             sort__has_parent = 0;
+int             sort__has_sym = 0;
 int             sort__branch_mode = -1; /* -1 = means not set */
 
 enum sort_type  sort__first_dimension;
 
-char * field_sep;
-
 LIST_HEAD(hist_entry__sort_list);
 
 static int repsep_snprintf(char *bf, size_t size, const char *fmt, ...)
@@ -23,11 +22,11 @@ static int repsep_snprintf(char *bf, size_t size, const char *fmt, ...)
 
         va_start(ap, fmt);
         n = vsnprintf(bf, size, fmt, ap);
-        if (field_sep && n > 0) {
+        if (symbol_conf.field_sep && n > 0) {
                 char *sep = bf;
 
                 while (1) {
-                        sep = strchr(sep, *field_sep);
+                        sep = strchr(sep, *symbol_conf.field_sep);
                         if (sep == NULL)
                                 break;
                         *sep = '.';
@@ -172,7 +171,7 @@ static int hist_entry__dso_snprintf(struct hist_entry *self, char *bf,
 
 static int _hist_entry__sym_snprintf(struct map *map, struct symbol *sym,
                                      u64 ip, char level, char *bf, size_t size,
-                                     unsigned int width __used)
+                                     unsigned int width __maybe_unused)
 {
         size_t ret = 0;
 
@@ -207,7 +206,8 @@ struct sort_entry sort_dso = {
 };
 
 static int hist_entry__sym_snprintf(struct hist_entry *self, char *bf,
-                                    size_t size, unsigned int width __used)
+                                    size_t size,
+                                    unsigned int width __maybe_unused)
 {
         return _hist_entry__sym_snprintf(self->ms.map, self->ms.sym, self->ip,
                                          self->level, bf, size, width);
@@ -250,7 +250,8 @@ sort__srcline_cmp(struct hist_entry *left, struct hist_entry *right)
 }
 
 static int hist_entry__srcline_snprintf(struct hist_entry *self, char *bf,
-                                   size_t size, unsigned int width __used)
+                                        size_t size,
+                                        unsigned int width __maybe_unused)
 {
         FILE *fp;
         char cmd[PATH_MAX + 2], *path = self->srcline, *nl;
@@ -399,7 +400,8 @@ sort__sym_to_cmp(struct hist_entry *left, struct hist_entry *right)
 }
 
 static int hist_entry__sym_from_snprintf(struct hist_entry *self, char *bf,
-                                    size_t size, unsigned int width __used)
+                                        size_t size,
+                                        unsigned int width __maybe_unused)
 {
         struct addr_map_symbol *from = &self->branch_info->from;
         return _hist_entry__sym_snprintf(from->map, from->sym, from->addr,
@@ -408,7 +410,8 @@ static int hist_entry__sym_from_snprintf(struct hist_entry *self, char *bf,
 }
 
 static int hist_entry__sym_to_snprintf(struct hist_entry *self, char *bf,
-                                    size_t size, unsigned int width __used)
+                                       size_t size,
+                                       unsigned int width __maybe_unused)
 {
         struct addr_map_symbol *to = &self->branch_info->to;
         return _hist_entry__sym_snprintf(to->map, to->sym, to->addr,
@@ -509,6 +512,10 @@ int sort_dimension__add(const char *tok)
                                 return -EINVAL;
                         }
                         sort__has_parent = 1;
+                } else if (sd->entry == &sort_sym ||
+                           sd->entry == &sort_sym_from ||
+                           sd->entry == &sort_sym_to) {
+                        sort__has_sym = 1;
                 }
 
                 if (sd->taken)
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index e724b26acd51..12d634792de5 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -31,8 +31,8 @@ extern const char *parent_pattern;
 extern const char default_sort_order[];
 extern int sort__need_collapse;
 extern int sort__has_parent;
+extern int sort__has_sym;
 extern int sort__branch_mode;
-extern char *field_sep;
 extern struct sort_entry sort_comm;
 extern struct sort_entry sort_dso;
 extern struct sort_entry sort_sym;
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
new file mode 100644
index 000000000000..23742126f47c
--- /dev/null
+++ b/tools/perf/util/stat.c
@@ -0,0 +1,57 @@
+#include <math.h>
+
+#include "stat.h"
+
+void update_stats(struct stats *stats, u64 val)
+{
+        double delta;
+
+        stats->n++;
+        delta = val - stats->mean;
+        stats->mean += delta / stats->n;
+        stats->M2 += delta*(val - stats->mean);
+}
+
+double avg_stats(struct stats *stats)
+{
+        return stats->mean;
+}
+
+/*
+ * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
+ *
+ *       (\Sum n_i^2) - ((\Sum n_i)^2)/n
+ * s^2 = -------------------------------
+ *                  n - 1
+ *
+ * http://en.wikipedia.org/wiki/Stddev
+ *
+ * The std dev of the mean is related to the std dev by:
+ *
+ *             s
+ * s_mean = -------
+ *          sqrt(n)
+ *
+ */
+double stddev_stats(struct stats *stats)
+{
+        double variance, variance_mean;
+
+        if (!stats->n)
+                return 0.0;
+
+        variance = stats->M2 / (stats->n - 1);
+        variance_mean = variance / stats->n;
+
+        return sqrt(variance_mean);
+}
+
+double rel_stddev_stats(double stddev, double avg)
+{
+        double pct = 0.0;
+
+        if (avg)
+                pct = 100.0 * stddev/avg;
+
+        return pct;
+}
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
new file mode 100644
index 000000000000..588367c3c767
--- /dev/null
+++ b/tools/perf/util/stat.h
@@ -0,0 +1,16 @@
+#ifndef __PERF_STATS_H
+#define __PERF_STATS_H
+
+#include "types.h"
+
+struct stats
+{
+        double n, mean, M2;
+};
+
+void update_stats(struct stats *stats, u64 val);
+double avg_stats(struct stats *stats);
+double stddev_stats(struct stats *stats);
+double rel_stddev_stats(double stddev, double avg);
+
+#endif
diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index 199bc4d8905d..32170590892d 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -1,5 +1,5 @@
 #include "util.h"
-#include "string.h"
+#include "linux/string.h"
 
 #define K 1024LL
 /*
@@ -335,3 +335,19 @@ char *rtrim(char *s)
 
         return s;
 }
+
+/**
+ * memdup - duplicate region of memory
+ * @src: memory region to duplicate
+ * @len: memory region length
+ */
+void *memdup(const void *src, size_t len)
+{
+        void *p;
+
+        p = malloc(len);
+        if (p)
+                memcpy(p, src, len);
+
+        return p;
+}
diff --git a/tools/perf/util/strlist.c b/tools/perf/util/strlist.c
index 95856ff3dda4..155d8b7078a7 100644
--- a/tools/perf/util/strlist.c
+++ b/tools/perf/util/strlist.c
@@ -93,7 +93,7 @@ out:
 
 void strlist__remove(struct strlist *slist, struct str_node *snode)
 {
-        str_node__delete(snode, slist->dupstr);
+        rblist__remove_node(&slist->rblist, &snode->rb_node);
 }
 
 struct str_node *strlist__find(struct strlist *slist, const char *entry)
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
new file mode 100644
index 000000000000..db0cc92cf2ea
--- /dev/null
+++ b/tools/perf/util/symbol-elf.c
@@ -0,0 +1,841 @@
+#include <libelf.h>
+#include <gelf.h>
+#include <elf.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <inttypes.h>
+
+#include "symbol.h"
+#include "debug.h"
+
+#ifndef NT_GNU_BUILD_ID
+#define NT_GNU_BUILD_ID 3
+#endif
+
+/**
+ * elf_symtab__for_each_symbol - iterate thru all the symbols
+ *
+ * @syms: struct elf_symtab instance to iterate
+ * @idx: uint32_t idx
+ * @sym: GElf_Sym iterator
+ */
+#define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
+        for (idx = 0, gelf_getsym(syms, idx, &sym);\
+             idx < nr_syms; \
+             idx++, gelf_getsym(syms, idx, &sym))
+
+static inline uint8_t elf_sym__type(const GElf_Sym *sym)
+{
+        return GELF_ST_TYPE(sym->st_info);
+}
+
+static inline int elf_sym__is_function(const GElf_Sym *sym)
+{
+        return elf_sym__type(sym) == STT_FUNC &&
+               sym->st_name != 0 &&
+               sym->st_shndx != SHN_UNDEF;
+}
+
+static inline bool elf_sym__is_object(const GElf_Sym *sym)
+{
+        return elf_sym__type(sym) == STT_OBJECT &&
+                sym->st_name != 0 &&
+                sym->st_shndx != SHN_UNDEF;
+}
+
+static inline int elf_sym__is_label(const GElf_Sym *sym)
+{
+        return elf_sym__type(sym) == STT_NOTYPE &&
+                sym->st_name != 0 &&
+                sym->st_shndx != SHN_UNDEF &&
+                sym->st_shndx != SHN_ABS;
+}
+
+static bool elf_sym__is_a(GElf_Sym *sym, enum map_type type)
+{
+        switch (type) {
+        case MAP__FUNCTION:
+                return elf_sym__is_function(sym);
+        case MAP__VARIABLE:
+                return elf_sym__is_object(sym);
+        default:
+                return false;
+        }
+}
+
+static inline const char *elf_sym__name(const GElf_Sym *sym,
+                                        const Elf_Data *symstrs)
+{
+        return symstrs->d_buf + sym->st_name;
+}
+
+static inline const char *elf_sec__name(const GElf_Shdr *shdr,
+                                        const Elf_Data *secstrs)
+{
+        return secstrs->d_buf + shdr->sh_name;
+}
+
+static inline int elf_sec__is_text(const GElf_Shdr *shdr,
+                                        const Elf_Data *secstrs)
+{
+        return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
+}
+
+static inline bool elf_sec__is_data(const GElf_Shdr *shdr,
+                                    const Elf_Data *secstrs)
+{
+        return strstr(elf_sec__name(shdr, secstrs), "data") != NULL;
+}
+
+static bool elf_sec__is_a(GElf_Shdr *shdr, Elf_Data *secstrs,
+                          enum map_type type)
+{
+        switch (type) {
+        case MAP__FUNCTION:
+                return elf_sec__is_text(shdr, secstrs);
+        case MAP__VARIABLE:
+                return elf_sec__is_data(shdr, secstrs);
+        default:
+                return false;
+        }
+}
+
+static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)
+{
+        Elf_Scn *sec = NULL;
+        GElf_Shdr shdr;
+        size_t cnt = 1;
+
+        while ((sec = elf_nextscn(elf, sec)) != NULL) {
+                gelf_getshdr(sec, &shdr);
+
+                if ((addr >= shdr.sh_addr) &&
+                    (addr < (shdr.sh_addr + shdr.sh_size)))
+                        return cnt;
+
+                ++cnt;
+        }
+
+        return -1;
+}
+
+static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
+                                    GElf_Shdr *shp, const char *name,
+                                    size_t *idx)
+{
+        Elf_Scn *sec = NULL;
+        size_t cnt = 1;
+
+        /* Elf is corrupted/truncated, avoid calling elf_strptr. */
+        if (!elf_rawdata(elf_getscn(elf, ep->e_shstrndx), NULL))
+                return NULL;
+
+        while ((sec = elf_nextscn(elf, sec)) != NULL) {
+                char *str;
+
+                gelf_getshdr(sec, shp);
+                str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
+                if (!strcmp(name, str)) {
+                        if (idx)
+                                *idx = cnt;
+                        break;
+                }
+                ++cnt;
+        }
+
+        return sec;
+}
+
+#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
+        for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
+             idx < nr_entries; \
+             ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
+
+#define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
+        for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
+             idx < nr_entries; \
+             ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
+
+/*
+ * We need to check if we have a .dynsym, so that we can handle the
+ * .plt, synthesizing its symbols, that aren't on the symtabs (be it
+ * .dynsym or .symtab).
+ * And always look at the original dso, not at debuginfo packages, that
+ * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
+ */
+int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss, struct map *map,
+                                symbol_filter_t filter)
+{
+        uint32_t nr_rel_entries, idx;
+        GElf_Sym sym;
+        u64 plt_offset;
+        GElf_Shdr shdr_plt;
+        struct symbol *f;
+        GElf_Shdr shdr_rel_plt, shdr_dynsym;
+        Elf_Data *reldata, *syms, *symstrs;
+        Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
+        size_t dynsym_idx;
+        GElf_Ehdr ehdr;
+        char sympltname[1024];
+        Elf *elf;
+        int nr = 0, symidx, err = 0;
+
+        if (!ss->dynsym)
+                return 0;
+
+        elf = ss->elf;
+        ehdr = ss->ehdr;
+
+        scn_dynsym = ss->dynsym;
+        shdr_dynsym = ss->dynshdr;
+        dynsym_idx = ss->dynsym_idx;
+
+        if (scn_dynsym == NULL)
+                goto out_elf_end;
+
+        scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
+                                          ".rela.plt", NULL);
+        if (scn_plt_rel == NULL) {
+                scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
+                                                  ".rel.plt", NULL);
+                if (scn_plt_rel == NULL)
+                        goto out_elf_end;
+        }
+
+        err = -1;
+
+        if (shdr_rel_plt.sh_link != dynsym_idx)
+                goto out_elf_end;
+
+        if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
+                goto out_elf_end;
+
+        /*
+         * Fetch the relocation section to find the idxes to the GOT
+         * and the symbols in the .dynsym they refer to.
+         */
+        reldata = elf_getdata(scn_plt_rel, NULL);
+        if (reldata == NULL)
+                goto out_elf_end;
+
+        syms = elf_getdata(scn_dynsym, NULL);
+        if (syms == NULL)
+                goto out_elf_end;
+
+        scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
+        if (scn_symstrs == NULL)
+                goto out_elf_end;
+
+        symstrs = elf_getdata(scn_symstrs, NULL);
+        if (symstrs == NULL)
+                goto out_elf_end;
+
+        if (symstrs->d_size == 0)
+                goto out_elf_end;
+
+        nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
+        plt_offset = shdr_plt.sh_offset;
+
+        if (shdr_rel_plt.sh_type == SHT_RELA) {
+                GElf_Rela pos_mem, *pos;
+
+                elf_section__for_each_rela(reldata, pos, pos_mem, idx,
+                                           nr_rel_entries) {
+                        symidx = GELF_R_SYM(pos->r_info);
+                        plt_offset += shdr_plt.sh_entsize;
+                        gelf_getsym(syms, symidx, &sym);
+                        snprintf(sympltname, sizeof(sympltname),
+                                 "%s@plt", elf_sym__name(&sym, symstrs));
+
+                        f = symbol__new(plt_offset, shdr_plt.sh_entsize,
+                                        STB_GLOBAL, sympltname);
+                        if (!f)
+                                goto out_elf_end;
+
+                        if (filter && filter(map, f))
+                                symbol__delete(f);
+                        else {
+                                symbols__insert(&dso->symbols[map->type], f);
+                                ++nr;
+                        }
+                }
+        } else if (shdr_rel_plt.sh_type == SHT_REL) {
+                GElf_Rel pos_mem, *pos;
+                elf_section__for_each_rel(reldata, pos, pos_mem, idx,
+                                          nr_rel_entries) {
+                        symidx = GELF_R_SYM(pos->r_info);
+                        plt_offset += shdr_plt.sh_entsize;
+                        gelf_getsym(syms, symidx, &sym);
+                        snprintf(sympltname, sizeof(sympltname),
+                                 "%s@plt", elf_sym__name(&sym, symstrs));
+
+                        f = symbol__new(plt_offset, shdr_plt.sh_entsize,
+                                        STB_GLOBAL, sympltname);
+                        if (!f)
+                                goto out_elf_end;
+
+                        if (filter && filter(map, f))
+                                symbol__delete(f);
+                        else {
+                                symbols__insert(&dso->symbols[map->type], f);
+                                ++nr;
+                        }
+                }
+        }
+
+        err = 0;
+out_elf_end:
+        if (err == 0)
+                return nr;
+        pr_debug("%s: problems reading %s PLT info.\n",
+                 __func__, dso->long_name);
+        return 0;
+}
+
+/*
+ * Align offset to 4 bytes as needed for note name and descriptor data.
+ */
+#define NOTE_ALIGN(n) (((n) + 3) & -4U)
+
+static int elf_read_build_id(Elf *elf, void *bf, size_t size)
+{
+        int err = -1;
+        GElf_Ehdr ehdr;
+        GElf_Shdr shdr;
+        Elf_Data *data;
+        Elf_Scn *sec;
+        Elf_Kind ek;
+        void *ptr;
+
+        if (size < BUILD_ID_SIZE)
+                goto out;
+
+        ek = elf_kind(elf);
+        if (ek != ELF_K_ELF)
+                goto out;
+
+        if (gelf_getehdr(elf, &ehdr) == NULL) {
+                pr_err("%s: cannot get elf header.\n", __func__);
+                goto out;
+        }
+
+        /*
+         * Check following sections for notes:
+         *   '.note.gnu.build-id'
+         *   '.notes'
+         *   '.note' (VDSO specific)
+         */
+        do {
+                sec = elf_section_by_name(elf, &ehdr, &shdr,
+                                          ".note.gnu.build-id", NULL);
+                if (sec)
+                        break;
+
+                sec = elf_section_by_name(elf, &ehdr, &shdr,
+                                          ".notes", NULL);
+                if (sec)
+                        break;
+
+                sec = elf_section_by_name(elf, &ehdr, &shdr,
+                                          ".note", NULL);
+                if (sec)
+                        break;
+
+                return err;
+
+        } while (0);
+
+        data = elf_getdata(sec, NULL);
+        if (data == NULL)
+                goto out;
+
+        ptr = data->d_buf;
+        while (ptr < (data->d_buf + data->d_size)) {
+                GElf_Nhdr *nhdr = ptr;
+                size_t namesz = NOTE_ALIGN(nhdr->n_namesz),
+                       descsz = NOTE_ALIGN(nhdr->n_descsz);
+                const char *name;
+
+                ptr += sizeof(*nhdr);
+                name = ptr;
+                ptr += namesz;
+                if (nhdr->n_type == NT_GNU_BUILD_ID &&
+                    nhdr->n_namesz == sizeof("GNU")) {
+                        if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
+                                size_t sz = min(size, descsz);
+                                memcpy(bf, ptr, sz);
+                                memset(bf + sz, 0, size - sz);
+                                err = descsz;
+                                break;
+                        }
+                }
+                ptr += descsz;
+        }
+
+out:
+        return err;
+}
+
+int filename__read_build_id(const char *filename, void *bf, size_t size)
+{
+        int fd, err = -1;
+        Elf *elf;
+
+        if (size < BUILD_ID_SIZE)
+                goto out;
+
+        fd = open(filename, O_RDONLY);
+        if (fd < 0)
+                goto out;
+
+        elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
+        if (elf == NULL) {
+                pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
+                goto out_close;
+        }
+
+        err = elf_read_build_id(elf, bf, size);
+
+        elf_end(elf);
+out_close:
+        close(fd);
+out:
+        return err;
+}
+
+int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
+{
+        int fd, err = -1;
+
+        if (size < BUILD_ID_SIZE)
+                goto out;
+
+        fd = open(filename, O_RDONLY);
+        if (fd < 0)
+                goto out;
+
+        while (1) {
+                char bf[BUFSIZ];
+                GElf_Nhdr nhdr;
+                size_t namesz, descsz;
+
+                if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
+                        break;
+
+                namesz = NOTE_ALIGN(nhdr.n_namesz);
+                descsz = NOTE_ALIGN(nhdr.n_descsz);
+                if (nhdr.n_type == NT_GNU_BUILD_ID &&
+                    nhdr.n_namesz == sizeof("GNU")) {
+                        if (read(fd, bf, namesz) != (ssize_t)namesz)
+                                break;
+                        if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
+                                size_t sz = min(descsz, size);
+                                if (read(fd, build_id, sz) == (ssize_t)sz) {
+                                        memset(build_id + sz, 0, size - sz);
+                                        err = 0;
+                                        break;
+                                }
+                        } else if (read(fd, bf, descsz) != (ssize_t)descsz)
+                                break;
+                } else {
+                        int n = namesz + descsz;
+                        if (read(fd, bf, n) != n)
+                                break;
+                }
+        }
+        close(fd);
+out:
+        return err;
+}
+
+int filename__read_debuglink(const char *filename, char *debuglink,
+                             size_t size)
+{
+        int fd, err = -1;
+        Elf *elf;
+        GElf_Ehdr ehdr;
+        GElf_Shdr shdr;
+        Elf_Data *data;
+        Elf_Scn *sec;
+        Elf_Kind ek;
+
+        fd = open(filename, O_RDONLY);
+        if (fd < 0)
+                goto out;
+
+        elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
+        if (elf == NULL) {
+                pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
+                goto out_close;
+        }
+
+        ek = elf_kind(elf);
+        if (ek != ELF_K_ELF)
+                goto out_close;
+
+        if (gelf_getehdr(elf, &ehdr) == NULL) {
+                pr_err("%s: cannot get elf header.\n", __func__);
+                goto out_close;
+        }
+
+        sec = elf_section_by_name(elf, &ehdr, &shdr,
+                                  ".gnu_debuglink", NULL);
+        if (sec == NULL)
+                goto out_close;
+
+        data = elf_getdata(sec, NULL);
+        if (data == NULL)
+                goto out_close;
+
+        /* the start of this section is a zero-terminated string */
+        strncpy(debuglink, data->d_buf, size);
+
+        elf_end(elf);
+
+out_close:
+        close(fd);
+out:
+        return err;
+}
+
+static int dso__swap_init(struct dso *dso, unsigned char eidata)
+{
+        static unsigned int const endian = 1;
+
+        dso->needs_swap = DSO_SWAP__NO;
+
+        switch (eidata) {
+        case ELFDATA2LSB:
+                /* We are big endian, DSO is little endian. */
+                if (*(unsigned char const *)&endian != 1)
+                        dso->needs_swap = DSO_SWAP__YES;
+                break;
+
+        case ELFDATA2MSB:
+                /* We are little endian, DSO is big endian. */
+                if (*(unsigned char const *)&endian != 0)
+                        dso->needs_swap = DSO_SWAP__YES;
+                break;
+
+        default:
+                pr_err("unrecognized DSO data encoding %d\n", eidata);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+bool symsrc__possibly_runtime(struct symsrc *ss)
+{
+        return ss->dynsym || ss->opdsec;
+}
+
+bool symsrc__has_symtab(struct symsrc *ss)
+{
+        return ss->symtab != NULL;
+}
+
+void symsrc__destroy(struct symsrc *ss)
+{
+        free(ss->name);
+        elf_end(ss->elf);
+        close(ss->fd);
+}
+
+int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
+                 enum dso_binary_type type)
+{
+        int err = -1;
+        GElf_Ehdr ehdr;
+        Elf *elf;
+        int fd;
+
+        fd = open(name, O_RDONLY);
+        if (fd < 0)
+                return -1;
+
+        elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
+        if (elf == NULL) {
+                pr_debug("%s: cannot read %s ELF file.\n", __func__, name);
+                goto out_close;
+        }
+
+        if (gelf_getehdr(elf, &ehdr) == NULL) {
+                pr_debug("%s: cannot get elf header.\n", __func__);
+                goto out_elf_end;
+        }
+
+        if (dso__swap_init(dso, ehdr.e_ident[EI_DATA]))
+                goto out_elf_end;
+
+        /* Always reject images with a mismatched build-id: */
+        if (dso->has_build_id) {
+                u8 build_id[BUILD_ID_SIZE];
+
+                if (elf_read_build_id(elf, build_id, BUILD_ID_SIZE) < 0)
+                        goto out_elf_end;
+
+                if (!dso__build_id_equal(dso, build_id))
+                        goto out_elf_end;
+        }
+
+        ss->symtab = elf_section_by_name(elf, &ehdr, &ss->symshdr, ".symtab",
+                        NULL);
+        if (ss->symshdr.sh_type != SHT_SYMTAB)
+                ss->symtab = NULL;
+
+        ss->dynsym_idx = 0;
+        ss->dynsym = elf_section_by_name(elf, &ehdr, &ss->dynshdr, ".dynsym",
+                        &ss->dynsym_idx);
+        if (ss->dynshdr.sh_type != SHT_DYNSYM)
+                ss->dynsym = NULL;
+
+        ss->opdidx = 0;
+        ss->opdsec = elf_section_by_name(elf, &ehdr, &ss->opdshdr, ".opd",
+                        &ss->opdidx);
+        if (ss->opdshdr.sh_type != SHT_PROGBITS)
+                ss->opdsec = NULL;
+
+        if (dso->kernel == DSO_TYPE_USER) {
+                GElf_Shdr shdr;
+                ss->adjust_symbols = (ehdr.e_type == ET_EXEC ||
+                                elf_section_by_name(elf, &ehdr, &shdr,
+                                                     ".gnu.prelink_undo",
+                                                     NULL) != NULL);
+        } else {
+                ss->adjust_symbols = 0;
+        }
+
+        ss->name   = strdup(name);
+        if (!ss->name)
+                goto out_elf_end;
+
+        ss->elf    = elf;
+        ss->fd     = fd;
+        ss->ehdr   = ehdr;
+        ss->type   = type;
+
+        return 0;
+
+out_elf_end:
+        elf_end(elf);
+out_close:
+        close(fd);
+        return err;
+}
+
+int dso__load_sym(struct dso *dso, struct map *map,
+                  struct symsrc *syms_ss, struct symsrc *runtime_ss,
+                  symbol_filter_t filter, int kmodule)
+{
+        struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL;
+        struct map *curr_map = map;
+        struct dso *curr_dso = dso;
+        Elf_Data *symstrs, *secstrs;
+        uint32_t nr_syms;
+        int err = -1;
+        uint32_t idx;
+        GElf_Ehdr ehdr;
+        GElf_Shdr shdr;
+        Elf_Data *syms, *opddata = NULL;
+        GElf_Sym sym;
+        Elf_Scn *sec, *sec_strndx;
+        Elf *elf;
+        int nr = 0;
+
+        dso->symtab_type = syms_ss->type;
+
+        if (!syms_ss->symtab) {
+                syms_ss->symtab  = syms_ss->dynsym;
+                syms_ss->symshdr = syms_ss->dynshdr;
+        }
+
+        elf = syms_ss->elf;
+        ehdr = syms_ss->ehdr;
+        sec = syms_ss->symtab;
+        shdr = syms_ss->symshdr;
+
+        if (runtime_ss->opdsec)
+                opddata = elf_rawdata(runtime_ss->opdsec, NULL);
+
+        syms = elf_getdata(sec, NULL);
+        if (syms == NULL)
+                goto out_elf_end;
+
+        sec = elf_getscn(elf, shdr.sh_link);
+        if (sec == NULL)
+                goto out_elf_end;
+
+        symstrs = elf_getdata(sec, NULL);
+        if (symstrs == NULL)
+                goto out_elf_end;
+
+        sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
+        if (sec_strndx == NULL)
+                goto out_elf_end;
+
+        secstrs = elf_getdata(sec_strndx, NULL);
+        if (secstrs == NULL)
+                goto out_elf_end;
+
+        nr_syms = shdr.sh_size / shdr.sh_entsize;
+
+        memset(&sym, 0, sizeof(sym));
+        dso->adjust_symbols = runtime_ss->adjust_symbols;
+        elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
+                struct symbol *f;
+                const char *elf_name = elf_sym__name(&sym, symstrs);
+                char *demangled = NULL;
+                int is_label = elf_sym__is_label(&sym);
+                const char *section_name;
+                bool used_opd = false;
+
+                if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name &&
+                    strcmp(elf_name, kmap->ref_reloc_sym->name) == 0)
+                        kmap->ref_reloc_sym->unrelocated_addr = sym.st_value;
+
+                if (!is_label && !elf_sym__is_a(&sym, map->type))
+                        continue;
+
+                /* Reject ARM ELF "mapping symbols": these aren't unique and
+                 * don't identify functions, so will confuse the profile
+                 * output: */
+                if (ehdr.e_machine == EM_ARM) {
+                        if (!strcmp(elf_name, "$a") ||
+                            !strcmp(elf_name, "$d") ||
+                            !strcmp(elf_name, "$t"))
+                                continue;
+                }
+
+                if (runtime_ss->opdsec && sym.st_shndx == runtime_ss->opdidx) {
+                        u32 offset = sym.st_value - syms_ss->opdshdr.sh_addr;
+                        u64 *opd = opddata->d_buf + offset;
+                        sym.st_value = DSO__SWAP(dso, u64, *opd);
+                        sym.st_shndx = elf_addr_to_index(runtime_ss->elf,
+                                        sym.st_value);
+                        used_opd = true;
+                }
+
+                sec = elf_getscn(runtime_ss->elf, sym.st_shndx);
+                if (!sec)
+                        goto out_elf_end;
+
+                gelf_getshdr(sec, &shdr);
+
+                if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type))
+                        continue;
+
+                section_name = elf_sec__name(&shdr, secstrs);
+
+                /* On ARM, symbols for thumb functions have 1 added to
+                 * the symbol address as a flag - remove it */
+                if ((ehdr.e_machine == EM_ARM) &&
+                    (map->type == MAP__FUNCTION) &&
+                    (sym.st_value & 1))
+                        --sym.st_value;
+
+                if (dso->kernel != DSO_TYPE_USER || kmodule) {
+                        char dso_name[PATH_MAX];
+
+                        if (strcmp(section_name,
+                                   (curr_dso->short_name +
+                                    dso->short_name_len)) == 0)
+                                goto new_symbol;
+
+                        if (strcmp(section_name, ".text") == 0) {
+                                curr_map = map;
+                                curr_dso = dso;
+                                goto new_symbol;
+                        }
+
+                        snprintf(dso_name, sizeof(dso_name),
+                                 "%s%s", dso->short_name, section_name);
+
+                        curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name);
+                        if (curr_map == NULL) {
+                                u64 start = sym.st_value;
+
+                                if (kmodule)
+                                        start += map->start + shdr.sh_offset;
+
+                                curr_dso = dso__new(dso_name);
+                                if (curr_dso == NULL)
+                                        goto out_elf_end;
+                                curr_dso->kernel = dso->kernel;
+                                curr_dso->long_name = dso->long_name;
+                                curr_dso->long_name_len = dso->long_name_len;
+                                curr_map = map__new2(start, curr_dso,
+                                                     map->type);
+                                if (curr_map == NULL) {
+                                        dso__delete(curr_dso);
+                                        goto out_elf_end;
+                                }
+                                curr_map->map_ip = identity__map_ip;
+                                curr_map->unmap_ip = identity__map_ip;
+                                curr_dso->symtab_type = dso->symtab_type;
+                                map_groups__insert(kmap->kmaps, curr_map);
+                                dsos__add(&dso->node, curr_dso);
+                                dso__set_loaded(curr_dso, map->type);
+                        } else
+                                curr_dso = curr_map->dso;
+
+                        goto new_symbol;
+                }
+
+                if ((used_opd && runtime_ss->adjust_symbols)
+                                || (!used_opd && syms_ss->adjust_symbols)) {
+                        pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " "
+                                  "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__,
+                                  (u64)sym.st_value, (u64)shdr.sh_addr,
+                                  (u64)shdr.sh_offset);
+                        sym.st_value -= shdr.sh_addr - shdr.sh_offset;
+                }
+                /*
+                 * We need to figure out if the object was created from C++ sources
+                 * DWARF DW_compile_unit has this, but we don't always have access
+                 * to it...
+                 */
+                demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
+                if (demangled != NULL)
+                        elf_name = demangled;
+new_symbol:
+                f = symbol__new(sym.st_value, sym.st_size,
+                                GELF_ST_BIND(sym.st_info), elf_name);
+                free(demangled);
+                if (!f)
+                        goto out_elf_end;
+
+                if (filter && filter(curr_map, f))
+                        symbol__delete(f);
+                else {
+                        symbols__insert(&curr_dso->symbols[curr_map->type], f);
+                        nr++;
+                }
+        }
+
+        /*
+         * For misannotated, zeroed, ASM function sizes.
+         */
+        if (nr > 0) {
+                symbols__fixup_duplicate(&dso->symbols[map->type]);
+                symbols__fixup_end(&dso->symbols[map->type]);
+                if (kmap) {
+                        /*
+                         * We need to fixup this here too because we create new
+                         * maps here, for things like vsyscall sections.
+                         */
+                        __map_groups__fixup_end(kmap->kmaps, map->type);
+                }
+        }
+        err = nr;
+out_elf_end:
+        return err;
+}
+
+void symbol__elf_init(void)
+{
+        elf_version(EV_CURRENT);
+}
diff --git a/tools/perf/util/symbol-minimal.c b/tools/perf/util/symbol-minimal.c
new file mode 100644
index 000000000000..259f8f2ea9c9
--- /dev/null
+++ b/tools/perf/util/symbol-minimal.c
@@ -0,0 +1,307 @@
+#include "symbol.h"
+
+#include <elf.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <byteswap.h>
+#include <sys/stat.h>
+
+
+static bool check_need_swap(int file_endian)
+{
+        const int data = 1;
+        u8 *check = (u8 *)&data;
+        int host_endian;
+
+        if (check[0] == 1)
+                host_endian = ELFDATA2LSB;
+        else
+                host_endian = ELFDATA2MSB;
+
+        return host_endian != file_endian;
+}
+
+#define NOTE_ALIGN(sz) (((sz) + 3) & ~3)
+
+#define NT_GNU_BUILD_ID 3
+
+static int read_build_id(void *note_data, size_t note_len, void *bf,
+                         size_t size, bool need_swap)
+{
+        struct {
+                u32 n_namesz;
+                u32 n_descsz;
+                u32 n_type;
+        } *nhdr;
+        void *ptr;
+
+        ptr = note_data;
+        while (ptr < (note_data + note_len)) {
+                const char *name;
+                size_t namesz, descsz;
+
+                nhdr = ptr;
+                if (need_swap) {
+                        nhdr->n_namesz = bswap_32(nhdr->n_namesz);
+                        nhdr->n_descsz = bswap_32(nhdr->n_descsz);
+                        nhdr->n_type = bswap_32(nhdr->n_type);
+                }
+
+                namesz = NOTE_ALIGN(nhdr->n_namesz);
+                descsz = NOTE_ALIGN(nhdr->n_descsz);
+
+                ptr += sizeof(*nhdr);
+                name = ptr;
+                ptr += namesz;
+                if (nhdr->n_type == NT_GNU_BUILD_ID &&
+                    nhdr->n_namesz == sizeof("GNU")) {
+                        if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
+                                size_t sz = min(size, descsz);
+                                memcpy(bf, ptr, sz);
+                                memset(bf + sz, 0, size - sz);
+                                return 0;
+                        }
+                }
+                ptr += descsz;
+        }
+
+        return -1;
+}
+
+int filename__read_debuglink(const char *filename __maybe_unused,
+                             char *debuglink __maybe_unused,
+                             size_t size __maybe_unused)
+{
+        return -1;
+}
+
+/*
+ * Just try PT_NOTE header otherwise fails
+ */
+int filename__read_build_id(const char *filename, void *bf, size_t size)
+{
+        FILE *fp;
+        int ret = -1;
+        bool need_swap = false;
+        u8 e_ident[EI_NIDENT];
+        size_t buf_size;
+        void *buf;
+        int i;
+
+        fp = fopen(filename, "r");
+        if (fp == NULL)
+                return -1;
+
+        if (fread(e_ident, sizeof(e_ident), 1, fp) != 1)
+                goto out;
+
+        if (memcmp(e_ident, ELFMAG, SELFMAG) ||
+            e_ident[EI_VERSION] != EV_CURRENT)
+                goto out;
+
+        need_swap = check_need_swap(e_ident[EI_DATA]);
+
+        /* for simplicity */
+        fseek(fp, 0, SEEK_SET);
+
+        if (e_ident[EI_CLASS] == ELFCLASS32) {
+                Elf32_Ehdr ehdr;
+                Elf32_Phdr *phdr;
+
+                if (fread(&ehdr, sizeof(ehdr), 1, fp) != 1)
+                        goto out;
+
+                if (need_swap) {
+                        ehdr.e_phoff = bswap_32(ehdr.e_phoff);
+                        ehdr.e_phentsize = bswap_16(ehdr.e_phentsize);
+                        ehdr.e_phnum = bswap_16(ehdr.e_phnum);
+                }
+
+                buf_size = ehdr.e_phentsize * ehdr.e_phnum;
+                buf = malloc(buf_size);
+                if (buf == NULL)
+                        goto out;
+
+                fseek(fp, ehdr.e_phoff, SEEK_SET);
+                if (fread(buf, buf_size, 1, fp) != 1)
+                        goto out_free;
+
+                for (i = 0, phdr = buf; i < ehdr.e_phnum; i++, phdr++) {
+                        void *tmp;
+
+                        if (need_swap) {
+                                phdr->p_type = bswap_32(phdr->p_type);
+                                phdr->p_offset = bswap_32(phdr->p_offset);
+                                phdr->p_filesz = bswap_32(phdr->p_filesz);
+                        }
+
+                        if (phdr->p_type != PT_NOTE)
+                                continue;
+
+                        buf_size = phdr->p_filesz;
+                        tmp = realloc(buf, buf_size);
+                        if (tmp == NULL)
+                                goto out_free;
+
+                        buf = tmp;
+                        fseek(fp, phdr->p_offset, SEEK_SET);
+                        if (fread(buf, buf_size, 1, fp) != 1)
+                                goto out_free;
+
+                        ret = read_build_id(buf, buf_size, bf, size, need_swap);
+                        if (ret == 0)
+                                ret = size;
+                        break;
+                }
+        } else {
+                Elf64_Ehdr ehdr;
+                Elf64_Phdr *phdr;
+
+                if (fread(&ehdr, sizeof(ehdr), 1, fp) != 1)
+                        goto out;
+
+                if (need_swap) {
+                        ehdr.e_phoff = bswap_64(ehdr.e_phoff);
+                        ehdr.e_phentsize = bswap_16(ehdr.e_phentsize);
+                        ehdr.e_phnum = bswap_16(ehdr.e_phnum);
+                }
+
+                buf_size = ehdr.e_phentsize * ehdr.e_phnum;
+                buf = malloc(buf_size);
+                if (buf == NULL)
+                        goto out;
+
+                fseek(fp, ehdr.e_phoff, SEEK_SET);
+                if (fread(buf, buf_size, 1, fp) != 1)
+                        goto out_free;
+
+                for (i = 0, phdr = buf; i < ehdr.e_phnum; i++, phdr++) {
+                        void *tmp;
+
+                        if (need_swap) {
+                                phdr->p_type = bswap_32(phdr->p_type);
+                                phdr->p_offset = bswap_64(phdr->p_offset);
+                                phdr->p_filesz = bswap_64(phdr->p_filesz);
+                        }
+
+                        if (phdr->p_type != PT_NOTE)
+                                continue;
+
+                        buf_size = phdr->p_filesz;
+                        tmp = realloc(buf, buf_size);
+                        if (tmp == NULL)
+                                goto out_free;
+
+                        buf = tmp;
+                        fseek(fp, phdr->p_offset, SEEK_SET);
+                        if (fread(buf, buf_size, 1, fp) != 1)
+                                goto out_free;
+
+                        ret = read_build_id(buf, buf_size, bf, size, need_swap);
+                        if (ret == 0)
+                                ret = size;
+                        break;
+                }
+        }
+out_free:
+        free(buf);
+out:
+        fclose(fp);
+        return ret;
+}
+
+int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
+{
+        int fd;
+        int ret = -1;
+        struct stat stbuf;
+        size_t buf_size;
+        void *buf;
+
+        fd = open(filename, O_RDONLY);
+        if (fd < 0)
+                return -1;
+
+        if (fstat(fd, &stbuf) < 0)
+                goto out;
+
+        buf_size = stbuf.st_size;
+        buf = malloc(buf_size);
+        if (buf == NULL)
+                goto out;
+
+        if (read(fd, buf, buf_size) != (ssize_t) buf_size)
+                goto out_free;
+
+        ret = read_build_id(buf, buf_size, build_id, size, false);
+out_free:
+        free(buf);
+out:
+        close(fd);
+        return ret;
+}
+
+int symsrc__init(struct symsrc *ss, struct dso *dso __maybe_unused,
+                 const char *name,
+                 enum dso_binary_type type)
+{
+        int fd = open(name, O_RDONLY);
+        if (fd < 0)
+                return -1;
+
+        ss->name = strdup(name);
+        if (!ss->name)
+                goto out_close;
+
+        ss->type = type;
+
+        return 0;
+out_close:
+        close(fd);
+        return -1;
+}
+
+bool symsrc__possibly_runtime(struct symsrc *ss __maybe_unused)
+{
+        /* Assume all sym sources could be a runtime image. */
+        return true;
+}
+
+bool symsrc__has_symtab(struct symsrc *ss __maybe_unused)
+{
+        return false;
+}
+
+void symsrc__destroy(struct symsrc *ss)
+{
+        free(ss->name);
+        close(ss->fd);
+}
+
+int dso__synthesize_plt_symbols(struct dso *dso __maybe_unused,
+                                struct symsrc *ss __maybe_unused,
+                                struct map *map __maybe_unused,
+                                symbol_filter_t filter __maybe_unused)
+{
+        return 0;
+}
+
+int dso__load_sym(struct dso *dso, struct map *map __maybe_unused,
+                  struct symsrc *ss,
+                  struct symsrc *runtime_ss __maybe_unused,
+                  symbol_filter_t filter __maybe_unused,
+                  int kmodule __maybe_unused)
+{
+        unsigned char *build_id[BUILD_ID_SIZE];
+
+        if (filename__read_build_id(ss->name, build_id, BUILD_ID_SIZE) > 0) {
+                dso__set_build_id(dso, build_id);
+                return 1;
+        }
+        return 0;
+}
+
+void symbol__elf_init(void)
+{
+}
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 8b63b678e127..e2e8c697cffe 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -15,8 +15,6 @@
 #include "symbol.h"
 #include "strlist.h"
 
-#include <libelf.h>
-#include <gelf.h>
 #include <elf.h>
 #include <limits.h>
 #include <sys/utsname.h>
@@ -25,15 +23,7 @@
 #define KSYM_NAME_LEN 256
 #endif
 
-#ifndef NT_GNU_BUILD_ID
-#define NT_GNU_BUILD_ID 3
-#endif
-
 static void dso_cache__free(struct rb_root *root);
-static bool dso__build_id_equal(const struct dso *dso, u8 *build_id);
-static int elf_read_build_id(Elf *elf, void *bf, size_t size);
-static void dsos__add(struct list_head *head, struct dso *dso);
-static struct map *map__new2(u64 start, struct dso *dso, enum map_type type);
 static int dso__load_kernel_sym(struct dso *dso, struct map *map,
                                 symbol_filter_t filter);
 static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map,
@@ -170,7 +160,7 @@ static int choose_best_symbol(struct symbol *syma, struct symbol *symb)
                 return SYMBOL_B;
 }
 
-static void symbols__fixup_duplicate(struct rb_root *symbols)
+void symbols__fixup_duplicate(struct rb_root *symbols)
 {
         struct rb_node *nd;
         struct symbol *curr, *next;
@@ -199,7 +189,7 @@ again:
         }
 }
 
-static void symbols__fixup_end(struct rb_root *symbols)
+void symbols__fixup_end(struct rb_root *symbols)
 {
         struct rb_node *nd, *prevnd = rb_first(symbols);
         struct symbol *curr, *prev;
@@ -222,7 +212,7 @@ static void symbols__fixup_end(struct rb_root *symbols)
                 curr->end = roundup(curr->start, 4096);
 }
 
-static void __map_groups__fixup_end(struct map_groups *mg, enum map_type type)
+void __map_groups__fixup_end(struct map_groups *mg, enum map_type type)
 {
         struct map *prev, *curr;
         struct rb_node *nd, *prevnd = rb_first(&mg->maps[type]);
@@ -252,8 +242,7 @@ static void map_groups__fixup_end(struct map_groups *mg)
                 __map_groups__fixup_end(mg, i);
 }
 
-static struct symbol *symbol__new(u64 start, u64 len, u8 binding,
-                                  const char *name)
+struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name)
 {
         size_t namelen = strlen(name) + 1;
         struct symbol *sym = calloc(1, (symbol_conf.priv_size +
@@ -390,7 +379,7 @@ void dso__set_build_id(struct dso *dso, void *build_id)
         dso->has_build_id = 1;
 }
 
-static void symbols__insert(struct rb_root *symbols, struct symbol *sym)
+void symbols__insert(struct rb_root *symbols, struct symbol *sym)
 {
         struct rb_node **p = &symbols->rb_node;
         struct rb_node *parent = NULL;
@@ -574,7 +563,7 @@ size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp)
 
 int kallsyms__parse(const char *filename, void *arg,
                     int (*process_symbol)(void *arg, const char *name,
-                                          char type, u64 start, u64 end))
+                                          char type, u64 start))
 {
         char *line = NULL;
         size_t n;
@@ -614,13 +603,8 @@ int kallsyms__parse(const char *filename, void *arg,
                         break;
                 }
 
-                /*
-                 * module symbols are not sorted so we add all
-                 * symbols with zero length and rely on
-                 * symbols__fixup_end() to fix it up.
-                 */
                 err = process_symbol(arg, symbol_name,
-                                     symbol_type, start, start);
+                                     symbol_type, start);
                 if (err)
                         break;
         }
@@ -647,7 +631,7 @@ static u8 kallsyms2elf_type(char type)
 }
 
 static int map__process_kallsym_symbol(void *arg, const char *name,
-                                       char type, u64 start, u64 end)
+                                       char type, u64 start)
 {
         struct symbol *sym;
         struct process_kallsyms_args *a = arg;
@@ -656,8 +640,12 @@ static int map__process_kallsym_symbol(void *arg, const char *name,
         if (!symbol_type__is_a(type, a->map->type))
                 return 0;
 
-        sym = symbol__new(start, end - start + 1,
-                          kallsyms2elf_type(type), name);
+        /*
+         * module symbols are not sorted so we add all
+         * symbols, setting length to 0, and rely on
+         * symbols__fixup_end() to fix it up.
+         */
+        sym = symbol__new(start, 0, kallsyms2elf_type(type), name);
         if (sym == NULL)
                 return -ENOMEM;
         /*
@@ -904,556 +892,7 @@ out_failure:
         return -1;
 }
 
-/**
- * elf_symtab__for_each_symbol - iterate thru all the symbols
- *
- * @syms: struct elf_symtab instance to iterate
- * @idx: uint32_t idx
- * @sym: GElf_Sym iterator
- */
-#define elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) \
-        for (idx = 0, gelf_getsym(syms, idx, &sym);\
-             idx < nr_syms; \
-             idx++, gelf_getsym(syms, idx, &sym))
-
-static inline uint8_t elf_sym__type(const GElf_Sym *sym)
-{
-        return GELF_ST_TYPE(sym->st_info);
-}
-
-static inline int elf_sym__is_function(const GElf_Sym *sym)
-{
-        return elf_sym__type(sym) == STT_FUNC &&
-               sym->st_name != 0 &&
-               sym->st_shndx != SHN_UNDEF;
-}
-
-static inline bool elf_sym__is_object(const GElf_Sym *sym)
-{
-        return elf_sym__type(sym) == STT_OBJECT &&
-                sym->st_name != 0 &&
-                sym->st_shndx != SHN_UNDEF;
-}
-
-static inline int elf_sym__is_label(const GElf_Sym *sym)
-{
-        return elf_sym__type(sym) == STT_NOTYPE &&
-                sym->st_name != 0 &&
-                sym->st_shndx != SHN_UNDEF &&
-                sym->st_shndx != SHN_ABS;
-}
-
-static inline const char *elf_sec__name(const GElf_Shdr *shdr,
-                                        const Elf_Data *secstrs)
-{
-        return secstrs->d_buf + shdr->sh_name;
-}
-
-static inline int elf_sec__is_text(const GElf_Shdr *shdr,
-                                        const Elf_Data *secstrs)
-{
-        return strstr(elf_sec__name(shdr, secstrs), "text") != NULL;
-}
-
-static inline bool elf_sec__is_data(const GElf_Shdr *shdr,
-                                    const Elf_Data *secstrs)
-{
-        return strstr(elf_sec__name(shdr, secstrs), "data") != NULL;
-}
-
-static inline const char *elf_sym__name(const GElf_Sym *sym,
-                                        const Elf_Data *symstrs)
-{
-        return symstrs->d_buf + sym->st_name;
-}
-
-static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
-                                    GElf_Shdr *shp, const char *name,
-                                    size_t *idx)
-{
-        Elf_Scn *sec = NULL;
-        size_t cnt = 1;
-
-        while ((sec = elf_nextscn(elf, sec)) != NULL) {
-                char *str;
-
-                gelf_getshdr(sec, shp);
-                str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
-                if (!strcmp(name, str)) {
-                        if (idx)
-                                *idx = cnt;
-                        break;
-                }
-                ++cnt;
-        }
-
-        return sec;
-}
-
-#define elf_section__for_each_rel(reldata, pos, pos_mem, idx, nr_entries) \
-        for (idx = 0, pos = gelf_getrel(reldata, 0, &pos_mem); \
-             idx < nr_entries; \
-             ++idx, pos = gelf_getrel(reldata, idx, &pos_mem))
-
-#define elf_section__for_each_rela(reldata, pos, pos_mem, idx, nr_entries) \
-        for (idx = 0, pos = gelf_getrela(reldata, 0, &pos_mem); \
-             idx < nr_entries; \
-             ++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
-
-/*
- * We need to check if we have a .dynsym, so that we can handle the
- * .plt, synthesizing its symbols, that aren't on the symtabs (be it
- * .dynsym or .symtab).
- * And always look at the original dso, not at debuginfo packages, that
- * have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
- */
-static int
-dso__synthesize_plt_symbols(struct dso *dso, char *name, struct map *map,
-                            symbol_filter_t filter)
-{
-        uint32_t nr_rel_entries, idx;
-        GElf_Sym sym;
-        u64 plt_offset;
-        GElf_Shdr shdr_plt;
-        struct symbol *f;
-        GElf_Shdr shdr_rel_plt, shdr_dynsym;
-        Elf_Data *reldata, *syms, *symstrs;
-        Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
-        size_t dynsym_idx;
-        GElf_Ehdr ehdr;
-        char sympltname[1024];
-        Elf *elf;
-        int nr = 0, symidx, fd, err = 0;
-
-        fd = open(name, O_RDONLY);
-        if (fd < 0)
-                goto out;
-
-        elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
-        if (elf == NULL)
-                goto out_close;
-
-        if (gelf_getehdr(elf, &ehdr) == NULL)
-                goto out_elf_end;
-
-        scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
-                                         ".dynsym", &dynsym_idx);
-        if (scn_dynsym == NULL)
-                goto out_elf_end;
-
-        scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
-                                          ".rela.plt", NULL);
-        if (scn_plt_rel == NULL) {
-                scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
-                                                  ".rel.plt", NULL);
-                if (scn_plt_rel == NULL)
-                        goto out_elf_end;
-        }
-
-        err = -1;
-
-        if (shdr_rel_plt.sh_link != dynsym_idx)
-                goto out_elf_end;
-
-        if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
-                goto out_elf_end;
-
-        /*
-         * Fetch the relocation section to find the idxes to the GOT
-         * and the symbols in the .dynsym they refer to.
-         */
-        reldata = elf_getdata(scn_plt_rel, NULL);
-        if (reldata == NULL)
-                goto out_elf_end;
-
-        syms = elf_getdata(scn_dynsym, NULL);
-        if (syms == NULL)
-                goto out_elf_end;
-
-        scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
-        if (scn_symstrs == NULL)
-                goto out_elf_end;
-
-        symstrs = elf_getdata(scn_symstrs, NULL);
-        if (symstrs == NULL)
-                goto out_elf_end;
-
-        nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
-        plt_offset = shdr_plt.sh_offset;
-
-        if (shdr_rel_plt.sh_type == SHT_RELA) {
-                GElf_Rela pos_mem, *pos;
-
-                elf_section__for_each_rela(reldata, pos, pos_mem, idx,
-                                           nr_rel_entries) {
-                        symidx = GELF_R_SYM(pos->r_info);
-                        plt_offset += shdr_plt.sh_entsize;
-                        gelf_getsym(syms, symidx, &sym);
-                        snprintf(sympltname, sizeof(sympltname),
-                                 "%s@plt", elf_sym__name(&sym, symstrs));
-
-                        f = symbol__new(plt_offset, shdr_plt.sh_entsize,
-                                        STB_GLOBAL, sympltname);
-                        if (!f)
-                                goto out_elf_end;
-
-                        if (filter && filter(map, f))
-                                symbol__delete(f);
-                        else {
-                                symbols__insert(&dso->symbols[map->type], f);
-                                ++nr;
-                        }
-                }
-        } else if (shdr_rel_plt.sh_type == SHT_REL) {
-                GElf_Rel pos_mem, *pos;
-                elf_section__for_each_rel(reldata, pos, pos_mem, idx,
-                                          nr_rel_entries) {
-                        symidx = GELF_R_SYM(pos->r_info);
-                        plt_offset += shdr_plt.sh_entsize;
-                        gelf_getsym(syms, symidx, &sym);
-                        snprintf(sympltname, sizeof(sympltname),
-                                 "%s@plt", elf_sym__name(&sym, symstrs));
-
-                        f = symbol__new(plt_offset, shdr_plt.sh_entsize,
-                                        STB_GLOBAL, sympltname);
-                        if (!f)
-                                goto out_elf_end;
-
-                        if (filter && filter(map, f))
-                                symbol__delete(f);
-                        else {
-                                symbols__insert(&dso->symbols[map->type], f);
-                                ++nr;
-                        }
-                }
-        }
-
-        err = 0;
-out_elf_end:
-        elf_end(elf);
-out_close:
-        close(fd);
-
-        if (err == 0)
-                return nr;
-out:
-        pr_debug("%s: problems reading %s PLT info.\n",
-                 __func__, dso->long_name);
-        return 0;
-}
-
-static bool elf_sym__is_a(GElf_Sym *sym, enum map_type type)
-{
-        switch (type) {
-        case MAP__FUNCTION:
-                return elf_sym__is_function(sym);
-        case MAP__VARIABLE:
-                return elf_sym__is_object(sym);
-        default:
-                return false;
-        }
-}
-
-static bool elf_sec__is_a(GElf_Shdr *shdr, Elf_Data *secstrs,
-                          enum map_type type)
-{
-        switch (type) {
-        case MAP__FUNCTION:
-                return elf_sec__is_text(shdr, secstrs);
-        case MAP__VARIABLE:
-                return elf_sec__is_data(shdr, secstrs);
-        default:
-                return false;
-        }
-}
-
-static size_t elf_addr_to_index(Elf *elf, GElf_Addr addr)
-{
-        Elf_Scn *sec = NULL;
-        GElf_Shdr shdr;
-        size_t cnt = 1;
-
-        while ((sec = elf_nextscn(elf, sec)) != NULL) {
-                gelf_getshdr(sec, &shdr);
-
-                if ((addr >= shdr.sh_addr) &&
-                    (addr < (shdr.sh_addr + shdr.sh_size)))
-                        return cnt;
-
-                ++cnt;
-        }
-
-        return -1;
-}
-
-static int dso__swap_init(struct dso *dso, unsigned char eidata)
-{
-        static unsigned int const endian = 1;
-
-        dso->needs_swap = DSO_SWAP__NO;
-
-        switch (eidata) {
-        case ELFDATA2LSB:
-                /* We are big endian, DSO is little endian. */
-                if (*(unsigned char const *)&endian != 1)
-                        dso->needs_swap = DSO_SWAP__YES;
-                break;
-
-        case ELFDATA2MSB:
-                /* We are little endian, DSO is big endian. */
-                if (*(unsigned char const *)&endian != 0)
-                        dso->needs_swap = DSO_SWAP__YES;
-                break;
-
-        default:
-                pr_err("unrecognized DSO data encoding %d\n", eidata);
-                return -EINVAL;
-        }
-
-        return 0;
-}
-
-static int dso__load_sym(struct dso *dso, struct map *map, const char *name,
-                         int fd, symbol_filter_t filter, int kmodule,
-                         int want_symtab)
-{
-        struct kmap *kmap = dso->kernel ? map__kmap(map) : NULL;
-        struct map *curr_map = map;
-        struct dso *curr_dso = dso;
-        Elf_Data *symstrs, *secstrs;
-        uint32_t nr_syms;
-        int err = -1;
-        uint32_t idx;
-        GElf_Ehdr ehdr;
-        GElf_Shdr shdr, opdshdr;
-        Elf_Data *syms, *opddata = NULL;
-        GElf_Sym sym;
-        Elf_Scn *sec, *sec_strndx, *opdsec;
-        Elf *elf;
-        int nr = 0;
-        size_t opdidx = 0;
-
-        elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
-        if (elf == NULL) {
-                pr_debug("%s: cannot read %s ELF file.\n", __func__, name);
-                goto out_close;
-        }
-
-        if (gelf_getehdr(elf, &ehdr) == NULL) {
-                pr_debug("%s: cannot get elf header.\n", __func__);
-                goto out_elf_end;
-        }
-
-        if (dso__swap_init(dso, ehdr.e_ident[EI_DATA]))
-                goto out_elf_end;
-
-        /* Always reject images with a mismatched build-id: */
-        if (dso->has_build_id) {
-                u8 build_id[BUILD_ID_SIZE];
-
-                if (elf_read_build_id(elf, build_id, BUILD_ID_SIZE) < 0)
-                        goto out_elf_end;
-
-                if (!dso__build_id_equal(dso, build_id))
-                        goto out_elf_end;
-        }
-
-        sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
-        if (sec == NULL) {
-                if (want_symtab)
-                        goto out_elf_end;
-
-                sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
-                if (sec == NULL)
-                        goto out_elf_end;
-        }
-
-        opdsec = elf_section_by_name(elf, &ehdr, &opdshdr, ".opd", &opdidx);
-        if (opdshdr.sh_type != SHT_PROGBITS)
-                opdsec = NULL;
-        if (opdsec)
-                opddata = elf_rawdata(opdsec, NULL);
-
-        syms = elf_getdata(sec, NULL);
-        if (syms == NULL)
-                goto out_elf_end;
-
-        sec = elf_getscn(elf, shdr.sh_link);
-        if (sec == NULL)
-                goto out_elf_end;
-
-        symstrs = elf_getdata(sec, NULL);
-        if (symstrs == NULL)
-                goto out_elf_end;
-
-        sec_strndx = elf_getscn(elf, ehdr.e_shstrndx);
-        if (sec_strndx == NULL)
-                goto out_elf_end;
-
-        secstrs = elf_getdata(sec_strndx, NULL);
-        if (secstrs == NULL)
-                goto out_elf_end;
-
-        nr_syms = shdr.sh_size / shdr.sh_entsize;
-
-        memset(&sym, 0, sizeof(sym));
-        if (dso->kernel == DSO_TYPE_USER) {
-                dso->adjust_symbols = (ehdr.e_type == ET_EXEC ||
-                                elf_section_by_name(elf, &ehdr, &shdr,
-                                                     ".gnu.prelink_undo",
-                                                     NULL) != NULL);
-        } else {
-                dso->adjust_symbols = 0;
-        }
-        elf_symtab__for_each_symbol(syms, nr_syms, idx, sym) {
-                struct symbol *f;
-                const char *elf_name = elf_sym__name(&sym, symstrs);
-                char *demangled = NULL;
-                int is_label = elf_sym__is_label(&sym);
-                const char *section_name;
-
-                if (kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name &&
-                    strcmp(elf_name, kmap->ref_reloc_sym->name) == 0)
-                        kmap->ref_reloc_sym->unrelocated_addr = sym.st_value;
-
-                if (!is_label && !elf_sym__is_a(&sym, map->type))
-                        continue;
-
-                /* Reject ARM ELF "mapping symbols": these aren't unique and
-                 * don't identify functions, so will confuse the profile
-                 * output: */
-                if (ehdr.e_machine == EM_ARM) {
-                        if (!strcmp(elf_name, "$a") ||
-                            !strcmp(elf_name, "$d") ||
-                            !strcmp(elf_name, "$t"))
-                                continue;
-                }
-
-                if (opdsec && sym.st_shndx == opdidx) {
-                        u32 offset = sym.st_value - opdshdr.sh_addr;
-                        u64 *opd = opddata->d_buf + offset;
-                        sym.st_value = DSO__SWAP(dso, u64, *opd);
-                        sym.st_shndx = elf_addr_to_index(elf, sym.st_value);
-                }
-
-                sec = elf_getscn(elf, sym.st_shndx);
-                if (!sec)
-                        goto out_elf_end;
-
-                gelf_getshdr(sec, &shdr);
-
-                if (is_label && !elf_sec__is_a(&shdr, secstrs, map->type))
-                        continue;
-
-                section_name = elf_sec__name(&shdr, secstrs);
-
-                /* On ARM, symbols for thumb functions have 1 added to
-                 * the symbol address as a flag - remove it */
-                if ((ehdr.e_machine == EM_ARM) &&
-                    (map->type == MAP__FUNCTION) &&
-                    (sym.st_value & 1))
-                        --sym.st_value;
-
-                if (dso->kernel != DSO_TYPE_USER || kmodule) {
-                        char dso_name[PATH_MAX];
-
-                        if (strcmp(section_name,
-                                   (curr_dso->short_name +
-                                    dso->short_name_len)) == 0)
-                                goto new_symbol;
-
-                        if (strcmp(section_name, ".text") == 0) {
-                                curr_map = map;
-                                curr_dso = dso;
-                                goto new_symbol;
-                        }
-
-                        snprintf(dso_name, sizeof(dso_name),
-                                 "%s%s", dso->short_name, section_name);
-
-                        curr_map = map_groups__find_by_name(kmap->kmaps, map->type, dso_name);
-                        if (curr_map == NULL) {
-                                u64 start = sym.st_value;
-
-                                if (kmodule)
-                                        start += map->start + shdr.sh_offset;
-
-                                curr_dso = dso__new(dso_name);
-                                if (curr_dso == NULL)
-                                        goto out_elf_end;
-                                curr_dso->kernel = dso->kernel;
-                                curr_dso->long_name = dso->long_name;
-                                curr_dso->long_name_len = dso->long_name_len;
-                                curr_map = map__new2(start, curr_dso,
-                                                     map->type);
-                                if (curr_map == NULL) {
-                                        dso__delete(curr_dso);
-                                        goto out_elf_end;
-                                }
-                                curr_map->map_ip = identity__map_ip;
-                                curr_map->unmap_ip = identity__map_ip;
-                                curr_dso->symtab_type = dso->symtab_type;
-                                map_groups__insert(kmap->kmaps, curr_map);
-                                dsos__add(&dso->node, curr_dso);
-                                dso__set_loaded(curr_dso, map->type);
-                        } else
-                                curr_dso = curr_map->dso;
-
-                        goto new_symbol;
-                }
-
-                if (curr_dso->adjust_symbols) {
-                        pr_debug4("%s: adjusting symbol: st_value: %#" PRIx64 " "
-                                  "sh_addr: %#" PRIx64 " sh_offset: %#" PRIx64 "\n", __func__,
-                                  (u64)sym.st_value, (u64)shdr.sh_addr,
-                                  (u64)shdr.sh_offset);
-                        sym.st_value -= shdr.sh_addr - shdr.sh_offset;
-                }
-                /*
-                 * We need to figure out if the object was created from C++ sources
-                 * DWARF DW_compile_unit has this, but we don't always have access
-                 * to it...
-                 */
-                demangled = bfd_demangle(NULL, elf_name, DMGL_PARAMS | DMGL_ANSI);
-                if (demangled != NULL)
-                        elf_name = demangled;
-new_symbol:
-                f = symbol__new(sym.st_value, sym.st_size,
-                                GELF_ST_BIND(sym.st_info), elf_name);
-                free(demangled);
-                if (!f)
-                        goto out_elf_end;
-
-                if (filter && filter(curr_map, f))
-                        symbol__delete(f);
-                else {
-                        symbols__insert(&curr_dso->symbols[curr_map->type], f);
-                        nr++;
-                }
-        }
-
-        /*
-         * For misannotated, zeroed, ASM function sizes.
-         */
-        if (nr > 0) {
-                symbols__fixup_duplicate(&dso->symbols[map->type]);
-                symbols__fixup_end(&dso->symbols[map->type]);
-                if (kmap) {
-                        /*
-                         * We need to fixup this here too because we create new
-                         * maps here, for things like vsyscall sections.
-                         */
-                        __map_groups__fixup_end(kmap->kmaps, map->type);
-                }
-        }
-        err = nr;
-out_elf_end:
-        elf_end(elf);
-out_close:
-        return err;
-}
-
-static bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
+bool dso__build_id_equal(const struct dso *dso, u8 *build_id)
 {
         return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0;
 }
@@ -1480,216 +919,11 @@ bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
         return have_build_id;
 }
 
-/*
- * Align offset to 4 bytes as needed for note name and descriptor data.
- */
-#define NOTE_ALIGN(n) (((n) + 3) & -4U)
-
-static int elf_read_build_id(Elf *elf, void *bf, size_t size)
-{
-        int err = -1;
-        GElf_Ehdr ehdr;
-        GElf_Shdr shdr;
-        Elf_Data *data;
-        Elf_Scn *sec;
-        Elf_Kind ek;
-        void *ptr;
-
-        if (size < BUILD_ID_SIZE)
-                goto out;
-
-        ek = elf_kind(elf);
-        if (ek != ELF_K_ELF)
-                goto out;
-
-        if (gelf_getehdr(elf, &ehdr) == NULL) {
-                pr_err("%s: cannot get elf header.\n", __func__);
-                goto out;
-        }
-
-        /*
-         * Check following sections for notes:
-         *   '.note.gnu.build-id'
-         *   '.notes'
-         *   '.note' (VDSO specific)
-         */
-        do {
-                sec = elf_section_by_name(elf, &ehdr, &shdr,
-                                          ".note.gnu.build-id", NULL);
-                if (sec)
-                        break;
-
-                sec = elf_section_by_name(elf, &ehdr, &shdr,
-                                          ".notes", NULL);
-                if (sec)
-                        break;
-
-                sec = elf_section_by_name(elf, &ehdr, &shdr,
-                                          ".note", NULL);
-                if (sec)
-                        break;
-
-                return err;
-
-        } while (0);
-
-        data = elf_getdata(sec, NULL);
-        if (data == NULL)
-                goto out;
-
-        ptr = data->d_buf;
-        while (ptr < (data->d_buf + data->d_size)) {
-                GElf_Nhdr *nhdr = ptr;
-                size_t namesz = NOTE_ALIGN(nhdr->n_namesz),
-                       descsz = NOTE_ALIGN(nhdr->n_descsz);
-                const char *name;
-
-                ptr += sizeof(*nhdr);
-                name = ptr;
-                ptr += namesz;
-                if (nhdr->n_type == NT_GNU_BUILD_ID &&
-                    nhdr->n_namesz == sizeof("GNU")) {
-                        if (memcmp(name, "GNU", sizeof("GNU")) == 0) {
-                                size_t sz = min(size, descsz);
-                                memcpy(bf, ptr, sz);
-                                memset(bf + sz, 0, size - sz);
-                                err = descsz;
-                                break;
-                        }
-                }
-                ptr += descsz;
-        }
-
-out:
-        return err;
-}
-
-int filename__read_build_id(const char *filename, void *bf, size_t size)
-{
-        int fd, err = -1;
-        Elf *elf;
-
-        if (size < BUILD_ID_SIZE)
-                goto out;
-
-        fd = open(filename, O_RDONLY);
-        if (fd < 0)
-                goto out;
-
-        elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
-        if (elf == NULL) {
-                pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
-                goto out_close;
-        }
-
-        err = elf_read_build_id(elf, bf, size);
-
-        elf_end(elf);
-out_close:
-        close(fd);
-out:
-        return err;
-}
-
-int sysfs__read_build_id(const char *filename, void *build_id, size_t size)
-{
-        int fd, err = -1;
-
-        if (size < BUILD_ID_SIZE)
-                goto out;
-
-        fd = open(filename, O_RDONLY);
-        if (fd < 0)
-                goto out;
-
-        while (1) {
-                char bf[BUFSIZ];
-                GElf_Nhdr nhdr;
-                size_t namesz, descsz;
-
-                if (read(fd, &nhdr, sizeof(nhdr)) != sizeof(nhdr))
-                        break;
-
-                namesz = NOTE_ALIGN(nhdr.n_namesz);
-                descsz = NOTE_ALIGN(nhdr.n_descsz);
-                if (nhdr.n_type == NT_GNU_BUILD_ID &&
-                    nhdr.n_namesz == sizeof("GNU")) {
-                        if (read(fd, bf, namesz) != (ssize_t)namesz)
-                                break;
-                        if (memcmp(bf, "GNU", sizeof("GNU")) == 0) {
-                                size_t sz = min(descsz, size);
-                                if (read(fd, build_id, sz) == (ssize_t)sz) {
-                                        memset(build_id + sz, 0, size - sz);
-                                        err = 0;
-                                        break;
-                                }
-                        } else if (read(fd, bf, descsz) != (ssize_t)descsz)
-                                break;
-                } else {
-                        int n = namesz + descsz;
-                        if (read(fd, bf, n) != n)
-                                break;
-                }
-        }
-        close(fd);
-out:
-        return err;
-}
-
-static int filename__read_debuglink(const char *filename,
-                                    char *debuglink, size_t size)
-{
-        int fd, err = -1;
-        Elf *elf;
-        GElf_Ehdr ehdr;
-        GElf_Shdr shdr;
-        Elf_Data *data;
-        Elf_Scn *sec;
-        Elf_Kind ek;
-
-        fd = open(filename, O_RDONLY);
-        if (fd < 0)
-                goto out;
-
-        elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
-        if (elf == NULL) {
-                pr_debug2("%s: cannot read %s ELF file.\n", __func__, filename);
-                goto out_close;
-        }
-
-        ek = elf_kind(elf);
-        if (ek != ELF_K_ELF)
-                goto out_close;
-
-        if (gelf_getehdr(elf, &ehdr) == NULL) {
-                pr_err("%s: cannot get elf header.\n", __func__);
-                goto out_close;
-        }
-
-        sec = elf_section_by_name(elf, &ehdr, &shdr,
-                                  ".gnu_debuglink", NULL);
-        if (sec == NULL)
-                goto out_close;
-
-        data = elf_getdata(sec, NULL);
-        if (data == NULL)
-                goto out_close;
-
-        /* the start of this section is a zero-terminated string */
-        strncpy(debuglink, data->d_buf, size);
-
-        elf_end(elf);
-
-out_close:
-        close(fd);
-out:
-        return err;
-}
-
 char dso__symtab_origin(const struct dso *dso)
 {
         static const char origin[] = {
                 [DSO_BINARY_TYPE__KALLSYMS]             = 'k',
+                [DSO_BINARY_TYPE__VMLINUX]              = 'v',
                 [DSO_BINARY_TYPE__JAVA_JIT]             = 'j',
                 [DSO_BINARY_TYPE__DEBUGLINK]            = 'l',
                 [DSO_BINARY_TYPE__BUILD_ID_CACHE]       = 'B',
@@ -1700,6 +934,7 @@ char dso__symtab_origin(const struct dso *dso)
                 [DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE]  = 'K',
                 [DSO_BINARY_TYPE__GUEST_KALLSYMS]       = 'g',
                 [DSO_BINARY_TYPE__GUEST_KMODULE]        = 'G',
+                [DSO_BINARY_TYPE__GUEST_VMLINUX]        = 'V',
         };
 
         if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND)
@@ -1775,7 +1010,9 @@ int dso__binary_type_file(struct dso *dso, enum dso_binary_type type,
 
         default:
         case DSO_BINARY_TYPE__KALLSYMS:
+        case DSO_BINARY_TYPE__VMLINUX:
         case DSO_BINARY_TYPE__GUEST_KALLSYMS:
+        case DSO_BINARY_TYPE__GUEST_VMLINUX:
         case DSO_BINARY_TYPE__JAVA_JIT:
         case DSO_BINARY_TYPE__NOT_FOUND:
                 ret = -1;
@@ -1789,11 +1026,12 @@ int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
 {
         char *name;
         int ret = -1;
-        int fd;
         u_int i;
         struct machine *machine;
         char *root_dir = (char *) "";
-        int want_symtab;
+        int ss_pos = 0;
+        struct symsrc ss_[2];
+        struct symsrc *syms_ss = NULL, *runtime_ss = NULL;
 
         dso__set_loaded(dso, map->type);
 
@@ -1835,54 +1073,69 @@ int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
                 root_dir = machine->root_dir;
 
         /* Iterate over candidate debug images.
-         * On the first pass, only load images if they have a full symtab.
-         * Failing that, do a second pass where we accept .dynsym also
+         * Keep track of "interesting" ones (those which have a symtab, dynsym,
+         * and/or opd section) for processing.
          */
-        want_symtab = 1;
-restart:
         for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) {
+                struct symsrc *ss = &ss_[ss_pos];
+                bool next_slot = false;
 
-                dso->symtab_type = binary_type_symtab[i];
+                enum dso_binary_type symtab_type = binary_type_symtab[i];
 
-                if (dso__binary_type_file(dso, dso->symtab_type,
+                if (dso__binary_type_file(dso, symtab_type,
                                           root_dir, name, PATH_MAX))
                         continue;
 
                 /* Name is now the name of the next image to try */
-                fd = open(name, O_RDONLY);
-                if (fd < 0)
+                if (symsrc__init(ss, dso, name, symtab_type) < 0)
                         continue;
 
-                ret = dso__load_sym(dso, map, name, fd, filter, 0,
-                                    want_symtab);
-                close(fd);
+                if (!syms_ss && symsrc__has_symtab(ss)) {
+                        syms_ss = ss;
+                        next_slot = true;
+                }
 
-                /*
-                 * Some people seem to have debuginfo files _WITHOUT_ debug
-                 * info!?!?
-                 */
-                if (!ret)
-                        continue;
+                if (!runtime_ss && symsrc__possibly_runtime(ss)) {
+                        runtime_ss = ss;
+                        next_slot = true;
+                }
 
-                if (ret > 0) {
-                        int nr_plt;
+                if (next_slot) {
+                        ss_pos++;
 
-                        nr_plt = dso__synthesize_plt_symbols(dso, name, map, filter);
-                        if (nr_plt > 0)
-                                ret += nr_plt;
-                        break;
+                        if (syms_ss && runtime_ss)
+                                break;
                 }
+
         }
 
-        /*
-         * If we wanted a full symtab but no image had one,
-         * relax our requirements and repeat the search.
-         */
-        if (ret <= 0 && want_symtab) {
-                want_symtab = 0;
-                goto restart;
+        if (!runtime_ss && !syms_ss)
+                goto out_free;
+
+        if (runtime_ss && !syms_ss) {
+                syms_ss = runtime_ss;
+        }
+
+        /* We'll have to hope for the best */
+        if (!runtime_ss && syms_ss)
+                runtime_ss = syms_ss;
+
+        if (syms_ss)
+                ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, 0);
+        else
+                ret = -1;
+
+        if (ret > 0) {
+                int nr_plt;
+
+                nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss, map, filter);
+                if (nr_plt > 0)
+                        ret += nr_plt;
         }
 
+        for (; ss_pos > 0; ss_pos--)
+                symsrc__destroy(&ss_[ss_pos - 1]);
+out_free:
         free(name);
         if (ret < 0 && strstr(dso->name, " (deleted)") != NULL)
                 return 0;
@@ -2030,25 +1283,6 @@ static int machine__set_modules_path(struct machine *machine)
         return map_groups__set_modules_path_dir(&machine->kmaps, modules_path);
 }
 
-/*
- * Constructor variant for modules (where we know from /proc/modules where
- * they are loaded) and for vmlinux, where only after we load all the
- * symbols we'll know where it starts and ends.
- */
-static struct map *map__new2(u64 start, struct dso *dso, enum map_type type)
-{
-        struct map *map = calloc(1, (sizeof(*map) +
-                                     (dso->kernel ? sizeof(struct kmap) : 0)));
-        if (map != NULL) {
-                /*
-                 * ->end will be filled after we load all the symbols
-                 */
-                map__init(map, type, start, 0, 0, dso);
-        }
-
-        return map;
-}
-
 struct map *machine__new_module(struct machine *machine, u64 start,
                                 const char *filename)
 {
@@ -2141,22 +1375,30 @@ out_failure:
 int dso__load_vmlinux(struct dso *dso, struct map *map,
                       const char *vmlinux, symbol_filter_t filter)
 {
-        int err = -1, fd;
+        int err = -1;
+        struct symsrc ss;
         char symfs_vmlinux[PATH_MAX];
+        enum dso_binary_type symtab_type;
 
         snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s",
                  symbol_conf.symfs, vmlinux);
-        fd = open(symfs_vmlinux, O_RDONLY);
-        if (fd < 0)
+
+        if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
+                symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
+        else
+                symtab_type = DSO_BINARY_TYPE__VMLINUX;
+
+        if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type))
                 return -1;
 
-        dso__set_long_name(dso, (char *)vmlinux);
-        dso__set_loaded(dso, map->type);
-        err = dso__load_sym(dso, map, symfs_vmlinux, fd, filter, 0, 0);
-        close(fd);
+        err = dso__load_sym(dso, map, &ss, &ss, filter, 0);
+        symsrc__destroy(&ss);
 
-        if (err > 0)
+        if (err > 0) {
+                dso__set_long_name(dso, (char *)vmlinux);
+                dso__set_loaded(dso, map->type);
                 pr_debug("Using %s for symbols\n", symfs_vmlinux);
+        }
 
         return err;
 }
@@ -2173,10 +1415,8 @@ int dso__load_vmlinux_path(struct dso *dso, struct map *map,
         filename = dso__build_id_filename(dso, NULL, 0);
         if (filename != NULL) {
                 err = dso__load_vmlinux(dso, map, filename, filter);
-                if (err > 0) {
-                        dso__set_long_name(dso, filename);
+                if (err > 0)
                         goto out;
-                }
                 free(filename);
         }
 
@@ -2291,9 +1531,8 @@ do_kallsyms:
         free(kallsyms_allocated_filename);
 
         if (err > 0) {
+                dso__set_long_name(dso, strdup("[kernel.kallsyms]"));
 out_fixup:
-                if (kallsyms_filename != NULL)
-                        dso__set_long_name(dso, strdup("[kernel.kallsyms]"));
                 map__fixup_start(map);
                 map__fixup_end(map);
         }
@@ -2352,12 +1591,12 @@ out_try_fixup:
         return err;
 }
 
-static void dsos__add(struct list_head *head, struct dso *dso)
+void dsos__add(struct list_head *head, struct dso *dso)
 {
         list_add_tail(&dso->node, head);
 }
 
-static struct dso *dsos__find(struct list_head *head, const char *name)
+struct dso *dsos__find(struct list_head *head, const char *name)
 {
         struct dso *pos;
 
@@ -2516,7 +1755,7 @@ struct process_args {
 };
 
 static int symbol__in_kernel(void *arg, const char *name,
-                             char type __used, u64 start, u64 end __used)
+                             char type __maybe_unused, u64 start)
 {
         struct process_args *args = arg;
 
@@ -2752,9 +1991,10 @@ int symbol__init(void)
         if (symbol_conf.initialized)
                 return 0;
 
-        symbol_conf.priv_size = ALIGN(symbol_conf.priv_size, sizeof(u64));
+        symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64));
+
+        symbol__elf_init();
 
-        elf_version(EV_CURRENT);
         if (symbol_conf.sort_by_name)
                 symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
                                           sizeof(struct symbol));
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 1fe733a1e21f..b441b07172b7 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -10,22 +10,31 @@
 #include <linux/rbtree.h>
 #include <stdio.h>
 #include <byteswap.h>
+#include <libgen.h>
+
+#ifndef NO_LIBELF_SUPPORT
+#include <libelf.h>
+#include <gelf.h>
+#include <elf.h>
+#endif
 
 #ifdef HAVE_CPLUS_DEMANGLE
 extern char *cplus_demangle(const char *, int);
 
-static inline char *bfd_demangle(void __used *v, const char *c, int i)
+static inline char *bfd_demangle(void __maybe_unused *v, const char *c, int i)
 {
         return cplus_demangle(c, i);
 }
 #else
 #ifdef NO_DEMANGLE
-static inline char *bfd_demangle(void __used *v, const char __used *c,
-                                 int __used i)
+static inline char *bfd_demangle(void __maybe_unused *v,
+                                 const char __maybe_unused *c,
+                                 int __maybe_unused i)
 {
         return NULL;
 }
 #else
+#define PACKAGE 'perf'
 #include <bfd.h>
 #endif
 #endif
@@ -158,6 +167,8 @@ struct addr_location {
 enum dso_binary_type {
         DSO_BINARY_TYPE__KALLSYMS = 0,
         DSO_BINARY_TYPE__GUEST_KALLSYMS,
+        DSO_BINARY_TYPE__VMLINUX,
+        DSO_BINARY_TYPE__GUEST_VMLINUX,
         DSO_BINARY_TYPE__JAVA_JIT,
         DSO_BINARY_TYPE__DEBUGLINK,
         DSO_BINARY_TYPE__BUILD_ID_CACHE,
@@ -217,6 +228,36 @@ struct dso {
         char             name[0];
 };
 
+struct symsrc {
+        char *name;
+        int fd;
+        enum dso_binary_type type;
+
+#ifndef NO_LIBELF_SUPPORT
+        Elf *elf;
+        GElf_Ehdr ehdr;
+
+        Elf_Scn *opdsec;
+        size_t opdidx;
+        GElf_Shdr opdshdr;
+
+        Elf_Scn *symtab;
+        GElf_Shdr symshdr;
+
+        Elf_Scn *dynsym;
+        size_t dynsym_idx;
+        GElf_Shdr dynshdr;
+
+        bool adjust_symbols;
+#endif
+};
+
+void symsrc__destroy(struct symsrc *ss);
+int symsrc__init(struct symsrc *ss, struct dso *dso, const char *name,
+                 enum dso_binary_type type);
+bool symsrc__has_symtab(struct symsrc *ss);
+bool symsrc__possibly_runtime(struct symsrc *ss);
+
 #define DSO__SWAP(dso, type, val)                       \
 ({                                                      \
         type ____r = val;                               \
@@ -254,6 +295,8 @@ static inline void dso__set_loaded(struct dso *dso, enum map_type type)
 
 void dso__sort_by_name(struct dso *dso, enum map_type type);
 
+void dsos__add(struct list_head *head, struct dso *dso);
+struct dso *dsos__find(struct list_head *head, const char *name);
 struct dso *__dsos__findnew(struct list_head *head, const char *name);
 
 int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter);
@@ -283,6 +326,7 @@ size_t dso__fprintf(struct dso *dso, enum map_type type, FILE *fp);
 char dso__symtab_origin(const struct dso *dso);
 void dso__set_long_name(struct dso *dso, char *name);
 void dso__set_build_id(struct dso *dso, void *build_id);
+bool dso__build_id_equal(const struct dso *dso, u8 *build_id);
 void dso__read_running_kernel_build_id(struct dso *dso,
                                        struct machine *machine);
 struct map *dso__new_map(const char *name);
@@ -297,7 +341,9 @@ bool __dsos__read_build_ids(struct list_head *head, bool with_hits);
 int build_id__sprintf(const u8 *build_id, int len, char *bf);
 int kallsyms__parse(const char *filename, void *arg,
                     int (*process_symbol)(void *arg, const char *name,
-                                          char type, u64 start, u64 end));
+                                          char type, u64 start));
+int filename__read_debuglink(const char *filename, char *debuglink,
+                             size_t size);
 
 void machine__destroy_kernel_maps(struct machine *machine);
 int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel);
@@ -309,6 +355,8 @@ void machines__destroy_guest_kernel_maps(struct rb_root *machines);
 
 int symbol__init(void);
 void symbol__exit(void);
+void symbol__elf_init(void);
+struct symbol *symbol__new(u64 start, u64 len, u8 binding, const char *name);
 size_t symbol__fprintf_symname_offs(const struct symbol *sym,
                                     const struct addr_location *al, FILE *fp);
 size_t symbol__fprintf_symname(const struct symbol *sym, FILE *fp);
@@ -326,4 +374,15 @@ ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
                             struct machine *machine, u64 addr,
                             u8 *data, ssize_t size);
 int dso__test_data(void);
+int dso__load_sym(struct dso *dso, struct map *map, struct symsrc *syms_ss,
+                  struct symsrc *runtime_ss, symbol_filter_t filter,
+                  int kmodule);
+int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss,
+                                struct map *map, symbol_filter_t filter);
+
+void symbols__insert(struct rb_root *symbols, struct symbol *sym);
+void symbols__fixup_duplicate(struct rb_root *symbols);
+void symbols__fixup_end(struct rb_root *symbols);
+void __map_groups__fixup_end(struct map_groups *mg, enum map_type type);
+
 #endif /* __PERF_SYMBOL */
diff --git a/tools/perf/util/target.c b/tools/perf/util/target.c
index 051eaa68095e..065528b7563e 100644
--- a/tools/perf/util/target.c
+++ b/tools/perf/util/target.c
@@ -117,8 +117,8 @@ int perf_target__strerror(struct perf_target *target, int errnum,
 
                 if (err != buf) {
                         size_t len = strlen(err);
-                        char *c = mempcpy(buf, err, min(buflen - 1, len));
-                        *c = '\0';
+                        memcpy(buf, err, min(buflen - 1, len));
+                        *(buf + min(buflen - 1, len)) = '\0';
                 }
 
                 return 0;
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 70c2c13ff679..f66610b7bacf 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -16,6 +16,8 @@ struct thread {
         bool                    comm_set;
         char                    *comm;
         int                     comm_len;
+
+        void                    *priv;
 };
 
 struct machine;
diff --git a/tools/perf/util/top.c b/tools/perf/util/top.c
index 7eeebcee291c..884dde9b9bc1 100644
--- a/tools/perf/util/top.c
+++ b/tools/perf/util/top.c
@@ -58,8 +58,7 @@ size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size)
         }
 
         if (top->evlist->nr_entries == 1) {
-                struct perf_evsel *first;
-                first = list_entry(top->evlist->entries.next, struct perf_evsel, node);
+                struct perf_evsel *first = perf_evlist__first(top->evlist);
                 ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ",
                                 (uint64_t)first->attr.sample_period,
                                 top->freq ? "Hz" : "");
diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h
index 33347ca89ee4..86ff1b15059b 100644
--- a/tools/perf/util/top.h
+++ b/tools/perf/util/top.h
@@ -5,6 +5,7 @@
 #include "types.h"
 #include <stddef.h>
 #include <stdbool.h>
+#include <termios.h>
 
 struct perf_evlist;
 struct perf_evsel;
diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 0715c843c2e7..3aabcd687cd5 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -162,25 +162,16 @@ int trace_parse_common_pid(struct pevent *pevent, void *data)
         return pevent_data_pid(pevent, &record);
 }
 
-unsigned long long read_size(struct pevent *pevent, void *ptr, int size)
+unsigned long long read_size(struct event_format *event, void *ptr, int size)
 {
-        return pevent_read_number(pevent, ptr, size);
+        return pevent_read_number(event->pevent, ptr, size);
 }
 
-void print_trace_event(struct pevent *pevent, int cpu, void *data, int size)
+void event_format__print(struct event_format *event,
+                         int cpu, void *data, int size)
 {
-        struct event_format *event;
         struct pevent_record record;
         struct trace_seq s;
-        int type;
-
-        type = trace_parse_common_type(pevent, data);
-
-        event = pevent_find_event(pevent, type);
-        if (!event) {
-                warning("ug! no event found for type %d", type);
-                return;
-        }
 
         memset(&record, 0, sizeof(record));
         record.cpu = cpu;
@@ -192,6 +183,19 @@ void print_trace_event(struct pevent *pevent, int cpu, void *data, int size)
         trace_seq_do_printf(&s);
 }
 
+void print_trace_event(struct pevent *pevent, int cpu, void *data, int size)
+{
+        int type = trace_parse_common_type(pevent, data);
+        struct event_format *event = pevent_find_event(pevent, type);
+
+        if (!event) {
+                warning("ug! no event found for type %d", type);
+                return;
+        }
+
+        event_format__print(event, cpu, data, size);
+}
+
 void print_event(struct pevent *pevent, int cpu, void *data, int size,
                  unsigned long long nsecs, char *comm)
 {
@@ -217,7 +221,7 @@ void print_event(struct pevent *pevent, int cpu, void *data, int size,
 }
 
 void parse_proc_kallsyms(struct pevent *pevent,
-                         char *file, unsigned int size __unused)
+                         char *file, unsigned int size __maybe_unused)
 {
         unsigned long long addr;
         char *func;
@@ -225,31 +229,29 @@ void parse_proc_kallsyms(struct pevent *pevent,
         char *next = NULL;
         char *addr_str;
         char *mod;
-        char ch;
+        char *fmt;
 
         line = strtok_r(file, "\n", &next);
         while (line) {
                 mod = NULL;
-                sscanf(line, "%as %c %as\t[%as",
-                       (float *)(void *)&addr_str, /* workaround gcc warning */
-                       &ch, (float *)(void *)&func, (float *)(void *)&mod);
+                addr_str = strtok_r(line, " ", &fmt);
                 addr = strtoull(addr_str, NULL, 16);
-                free(addr_str);
-
-                /* truncate the extra ']' */
+                /* skip character */
+                strtok_r(NULL, " ", &fmt);
+                func = strtok_r(NULL, "\t", &fmt);
+                mod = strtok_r(NULL, "]", &fmt);
+                /* truncate the extra '[' */
                 if (mod)
-                        mod[strlen(mod) - 1] = 0;
+                        mod = mod + 1;
 
                 pevent_register_function(pevent, func, addr, mod);
-                free(func);
-                free(mod);
 
                 line = strtok_r(NULL, "\n", &next);
         }
 }
 
 void parse_ftrace_printk(struct pevent *pevent,
-                         char *file, unsigned int size __unused)
+                         char *file, unsigned int size __maybe_unused)
 {
         unsigned long long addr;
         char *printk;
@@ -289,7 +291,7 @@ struct event_format *trace_find_next_event(struct pevent *pevent,
 {
         static int idx;
 
-        if (!pevent->events)
+        if (!pevent || !pevent->events)
                 return NULL;
 
         if (!event) {
diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-event-scripting.c
index 474aa7a7df43..8715a1006d00 100644
--- a/tools/perf/util/trace-event-scripting.c
+++ b/tools/perf/util/trace-event-scripting.c
@@ -35,12 +35,11 @@ static int stop_script_unsupported(void)
         return 0;
 }
 
-static void process_event_unsupported(union perf_event *event __unused,
-                                      struct pevent *pevent __unused,
-                                      struct perf_sample *sample __unused,
-                                      struct perf_evsel *evsel __unused,
-                                      struct machine *machine __unused,
-                                      struct thread *thread __unused)
+static void process_event_unsupported(union perf_event *event __maybe_unused,
+                                      struct perf_sample *sample __maybe_unused,
+                                      struct perf_evsel *evsel __maybe_unused,
+                                      struct machine *machine __maybe_unused,
+                                      struct addr_location *al __maybe_unused)
 {
 }
 
@@ -53,17 +52,19 @@ static void print_python_unsupported_msg(void)
                 "\n  etc.\n");
 }
 
-static int python_start_script_unsupported(const char *script __unused,
-                                           int argc __unused,
-                                           const char **argv __unused)
+static int python_start_script_unsupported(const char *script __maybe_unused,
+                                           int argc __maybe_unused,
+                                           const char **argv __maybe_unused)
 {
         print_python_unsupported_msg();
 
         return -1;
 }
 
-static int python_generate_script_unsupported(struct pevent *pevent __unused,
-                                              const char *outfile __unused)
+static int python_generate_script_unsupported(struct pevent *pevent
+                                              __maybe_unused,
+                                              const char *outfile
+                                              __maybe_unused)
 {
         print_python_unsupported_msg();
 
@@ -115,17 +116,18 @@ static void print_perl_unsupported_msg(void)
                 "\n  etc.\n");
 }
 
-static int perl_start_script_unsupported(const char *script __unused,
-                                         int argc __unused,
-                                         const char **argv __unused)
+static int perl_start_script_unsupported(const char *script __maybe_unused,
+                                         int argc __maybe_unused,
+                                         const char **argv __maybe_unused)
 {
         print_perl_unsupported_msg();
 
         return -1;
 }
 
-static int perl_generate_script_unsupported(struct pevent *pevent __unused,
-                                            const char *outfile __unused)
+static int perl_generate_script_unsupported(struct pevent *pevent
+                                            __maybe_unused,
+                                            const char *outfile __maybe_unused)
 {
         print_perl_unsupported_msg();
 
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index 8fef1d6687b7..a55fd37ffea1 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -9,7 +9,6 @@ struct machine;
 struct perf_sample;
 union perf_event;
 struct perf_tool;
-struct thread;
 
 extern int header_page_size_size;
 extern int header_page_ts_size;
@@ -32,6 +31,8 @@ int bigendian(void);
 
 struct pevent *read_trace_init(int file_bigendian, int host_bigendian);
 void print_trace_event(struct pevent *pevent, int cpu, void *data, int size);
+void event_format__print(struct event_format *event,
+                         int cpu, void *data, int size);
 
 void print_event(struct pevent *pevent, int cpu, void *data, int size,
                  unsigned long long nsecs, char *comm);
@@ -56,7 +57,7 @@ int trace_parse_common_pid(struct pevent *pevent, void *data);
 
 struct event_format *trace_find_next_event(struct pevent *pevent,
                                            struct event_format *event);
-unsigned long long read_size(struct pevent *pevent, void *ptr, int size);
+unsigned long long read_size(struct event_format *event, void *ptr, int size);
 unsigned long long eval_flag(const char *flag);
 
 struct pevent_record *trace_read_data(struct pevent *pevent, int cpu);
@@ -74,16 +75,19 @@ struct tracing_data *tracing_data_get(struct list_head *pattrs,
 void tracing_data_put(struct tracing_data *tdata);
 
 
+struct addr_location;
+
+struct perf_session;
+
 struct scripting_ops {
         const char *name;
         int (*start_script) (const char *script, int argc, const char **argv);
         int (*stop_script) (void);
         void (*process_event) (union perf_event *event,
-                               struct pevent *pevent,
                                struct perf_sample *sample,
                                struct perf_evsel *evsel,
                                struct machine *machine,
-                               struct thread *thread);
+                               struct addr_location *al);
         int (*generate_script) (struct pevent *pevent, const char *outfile);
 };
 
diff --git a/tools/perf/util/unwind.c b/tools/perf/util/unwind.c
new file mode 100644
index 000000000000..958723ba3d2e
--- /dev/null
+++ b/tools/perf/util/unwind.c
@@ -0,0 +1,571 @@
+/*
+ * Post mortem Dwarf CFI based unwinding on top of regs and stack dumps.
+ *
+ * Lots of this code have been borrowed or heavily inspired from parts of
+ * the libunwind 0.99 code which are (amongst other contributors I may have
+ * forgotten):
+ *
+ * Copyright (C) 2002-2007 Hewlett-Packard Co
+ *      Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
+ *
+ * And the bugs have been added by:
+ *
+ * Copyright (C) 2010, Frederic Weisbecker <fweisbec@gmail.com>
+ * Copyright (C) 2012, Jiri Olsa <jolsa@redhat.com>
+ *
+ */
+
+#include <elf.h>
+#include <gelf.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <linux/list.h>
+#include <libunwind.h>
+#include <libunwind-ptrace.h>
+#include "thread.h"
+#include "session.h"
+#include "perf_regs.h"
+#include "unwind.h"
+#include "util.h"
+
+extern int
+UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
+                                    unw_word_t ip,
+                                    unw_dyn_info_t *di,
+                                    unw_proc_info_t *pi,
+                                    int need_unwind_info, void *arg);
+
+#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
+
+#define DW_EH_PE_FORMAT_MASK    0x0f    /* format of the encoded value */
+#define DW_EH_PE_APPL_MASK      0x70    /* how the value is to be applied */
+
+/* Pointer-encoding formats: */
+#define DW_EH_PE_omit           0xff
+#define DW_EH_PE_ptr            0x00    /* pointer-sized unsigned value */
+#define DW_EH_PE_udata4         0x03    /* unsigned 32-bit value */
+#define DW_EH_PE_udata8         0x04    /* unsigned 64-bit value */
+#define DW_EH_PE_sdata4         0x0b    /* signed 32-bit value */
+#define DW_EH_PE_sdata8         0x0c    /* signed 64-bit value */
+
+/* Pointer-encoding application: */
+#define DW_EH_PE_absptr         0x00    /* absolute value */
+#define DW_EH_PE_pcrel          0x10    /* rel. to addr. of encoded value */
+
+/*
+ * The following are not documented by LSB v1.3, yet they are used by
+ * GCC, presumably they aren't documented by LSB since they aren't
+ * used on Linux:
+ */
+#define DW_EH_PE_funcrel        0x40    /* start-of-procedure-relative */
+#define DW_EH_PE_aligned        0x50    /* aligned pointer */
+
+/* Flags intentionaly not handled, since they're not needed:
+ * #define DW_EH_PE_indirect      0x80
+ * #define DW_EH_PE_uleb128       0x01
+ * #define DW_EH_PE_udata2        0x02
+ * #define DW_EH_PE_sleb128       0x09
+ * #define DW_EH_PE_sdata2        0x0a
+ * #define DW_EH_PE_textrel       0x20
+ * #define DW_EH_PE_datarel       0x30
+ */
+
+struct unwind_info {
+        struct perf_sample      *sample;
+        struct machine          *machine;
+        struct thread           *thread;
+        u64                     sample_uregs;
+};
+
+#define dw_read(ptr, type, end) ({      \
+        type *__p = (type *) ptr;       \
+        type  __v;                      \
+        if ((__p + 1) > (type *) end)   \
+                return -EINVAL;         \
+        __v = *__p++;                   \
+        ptr = (typeof(ptr)) __p;        \
+        __v;                            \
+        })
+
+static int __dw_read_encoded_value(u8 **p, u8 *end, u64 *val,
+                                   u8 encoding)
+{
+        u8 *cur = *p;
+        *val = 0;
+
+        switch (encoding) {
+        case DW_EH_PE_omit:
+                *val = 0;
+                goto out;
+        case DW_EH_PE_ptr:
+                *val = dw_read(cur, unsigned long, end);
+                goto out;
+        default:
+                break;
+        }
+
+        switch (encoding & DW_EH_PE_APPL_MASK) {
+        case DW_EH_PE_absptr:
+                break;
+        case DW_EH_PE_pcrel:
+                *val = (unsigned long) cur;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        if ((encoding & 0x07) == 0x00)
+                encoding |= DW_EH_PE_udata4;
+
+        switch (encoding & DW_EH_PE_FORMAT_MASK) {
+        case DW_EH_PE_sdata4:
+                *val += dw_read(cur, s32, end);
+                break;
+        case DW_EH_PE_udata4:
+                *val += dw_read(cur, u32, end);
+                break;
+        case DW_EH_PE_sdata8:
+                *val += dw_read(cur, s64, end);
+                break;
+        case DW_EH_PE_udata8:
+                *val += dw_read(cur, u64, end);
+                break;
+        default:
+                return -EINVAL;
+        }
+
+ out:
+        *p = cur;
+        return 0;
+}
+
+#define dw_read_encoded_value(ptr, end, enc) ({                 \
+        u64 __v;                                                \
+        if (__dw_read_encoded_value(&ptr, end, &__v, enc)) {    \
+                return -EINVAL;                                 \
+        }                                                       \
+        __v;                                                    \
+        })
+
+static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
+                                    GElf_Shdr *shp, const char *name)
+{
+        Elf_Scn *sec = NULL;
+
+        while ((sec = elf_nextscn(elf, sec)) != NULL) {
+                char *str;
+
+                gelf_getshdr(sec, shp);
+                str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name);
+                if (!strcmp(name, str))
+                        break;
+        }
+
+        return sec;
+}
+
+static u64 elf_section_offset(int fd, const char *name)
+{
+        Elf *elf;
+        GElf_Ehdr ehdr;
+        GElf_Shdr shdr;
+        u64 offset = 0;
+
+        elf = elf_begin(fd, PERF_ELF_C_READ_MMAP, NULL);
+        if (elf == NULL)
+                return 0;
+
+        do {
+                if (gelf_getehdr(elf, &ehdr) == NULL)
+                        break;
+
+                if (!elf_section_by_name(elf, &ehdr, &shdr, name))
+                        break;
+
+                offset = shdr.sh_offset;
+        } while (0);
+
+        elf_end(elf);
+        return offset;
+}
+
+struct table_entry {
+        u32 start_ip_offset;
+        u32 fde_offset;
+};
+
+struct eh_frame_hdr {
+        unsigned char version;
+        unsigned char eh_frame_ptr_enc;
+        unsigned char fde_count_enc;
+        unsigned char table_enc;
+
+        /*
+         * The rest of the header is variable-length and consists of the
+         * following members:
+         *
+         *      encoded_t eh_frame_ptr;
+         *      encoded_t fde_count;
+         */
+
+        /* A single encoded pointer should not be more than 8 bytes. */
+        u64 enc[2];
+
+        /*
+         * struct {
+         *    encoded_t start_ip;
+         *    encoded_t fde_addr;
+         * } binary_search_table[fde_count];
+         */
+        char data[0];
+} __packed;
+
+static int unwind_spec_ehframe(struct dso *dso, struct machine *machine,
+                               u64 offset, u64 *table_data, u64 *segbase,
+                               u64 *fde_count)
+{
+        struct eh_frame_hdr hdr;
+        u8 *enc = (u8 *) &hdr.enc;
+        u8 *end = (u8 *) &hdr.data;
+        ssize_t r;
+
+        r = dso__data_read_offset(dso, machine, offset,
+                                  (u8 *) &hdr, sizeof(hdr));
+        if (r != sizeof(hdr))
+                return -EINVAL;
+
+        /* We dont need eh_frame_ptr, just skip it. */
+        dw_read_encoded_value(enc, end, hdr.eh_frame_ptr_enc);
+
+        *fde_count  = dw_read_encoded_value(enc, end, hdr.fde_count_enc);
+        *segbase    = offset;
+        *table_data = (enc - (u8 *) &hdr) + offset;
+        return 0;
+}
+
+static int read_unwind_spec(struct dso *dso, struct machine *machine,
+                            u64 *table_data, u64 *segbase, u64 *fde_count)
+{
+        int ret = -EINVAL, fd;
+        u64 offset;
+
+        fd = dso__data_fd(dso, machine);
+        if (fd < 0)
+                return -EINVAL;
+
+        offset = elf_section_offset(fd, ".eh_frame_hdr");
+        close(fd);
+
+        if (offset)
+                ret = unwind_spec_ehframe(dso, machine, offset,
+                                          table_data, segbase,
+                                          fde_count);
+
+        /* TODO .debug_frame check if eh_frame_hdr fails */
+        return ret;
+}
+
+static struct map *find_map(unw_word_t ip, struct unwind_info *ui)
+{
+        struct addr_location al;
+
+        thread__find_addr_map(ui->thread, ui->machine, PERF_RECORD_MISC_USER,
+                              MAP__FUNCTION, ip, &al);
+        return al.map;
+}
+
+static int
+find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
+               int need_unwind_info, void *arg)
+{
+        struct unwind_info *ui = arg;
+        struct map *map;
+        unw_dyn_info_t di;
+        u64 table_data, segbase, fde_count;
+
+        map = find_map(ip, ui);
+        if (!map || !map->dso)
+                return -EINVAL;
+
+        pr_debug("unwind: find_proc_info dso %s\n", map->dso->name);
+
+        if (read_unwind_spec(map->dso, ui->machine,
+                             &table_data, &segbase, &fde_count))
+                return -EINVAL;
+
+        memset(&di, 0, sizeof(di));
+        di.format   = UNW_INFO_FORMAT_REMOTE_TABLE;
+        di.start_ip = map->start;
+        di.end_ip   = map->end;
+        di.u.rti.segbase    = map->start + segbase;
+        di.u.rti.table_data = map->start + table_data;
+        di.u.rti.table_len  = fde_count * sizeof(struct table_entry)
+                              / sizeof(unw_word_t);
+        return dwarf_search_unwind_table(as, ip, &di, pi,
+                                         need_unwind_info, arg);
+}
+
+static int access_fpreg(unw_addr_space_t __maybe_unused as,
+                        unw_regnum_t __maybe_unused num,
+                        unw_fpreg_t __maybe_unused *val,
+                        int __maybe_unused __write,
+                        void __maybe_unused *arg)
+{
+        pr_err("unwind: access_fpreg unsupported\n");
+        return -UNW_EINVAL;
+}
+
+static int get_dyn_info_list_addr(unw_addr_space_t __maybe_unused as,
+                                  unw_word_t __maybe_unused *dil_addr,
+                                  void __maybe_unused *arg)
+{
+        return -UNW_ENOINFO;
+}
+
+static int resume(unw_addr_space_t __maybe_unused as,
+                  unw_cursor_t __maybe_unused *cu,
+                  void __maybe_unused *arg)
+{
+        pr_err("unwind: resume unsupported\n");
+        return -UNW_EINVAL;
+}
+
+static int
+get_proc_name(unw_addr_space_t __maybe_unused as,
+              unw_word_t __maybe_unused addr,
+                char __maybe_unused *bufp, size_t __maybe_unused buf_len,
+                unw_word_t __maybe_unused *offp, void __maybe_unused *arg)
+{
+        pr_err("unwind: get_proc_name unsupported\n");
+        return -UNW_EINVAL;
+}
+
+static int access_dso_mem(struct unwind_info *ui, unw_word_t addr,
+                          unw_word_t *data)
+{
+        struct addr_location al;
+        ssize_t size;
+
+        thread__find_addr_map(ui->thread, ui->machine, PERF_RECORD_MISC_USER,
+                              MAP__FUNCTION, addr, &al);
+        if (!al.map) {
+                pr_debug("unwind: no map for %lx\n", (unsigned long)addr);
+                return -1;
+        }
+
+        if (!al.map->dso)
+                return -1;
+
+        size = dso__data_read_addr(al.map->dso, al.map, ui->machine,
+                                   addr, (u8 *) data, sizeof(*data));
+
+        return !(size == sizeof(*data));
+}
+
+static int reg_value(unw_word_t *valp, struct regs_dump *regs, int id,
+                     u64 sample_regs)
+{
+        int i, idx = 0;
+
+        if (!(sample_regs & (1 << id)))
+                return -EINVAL;
+
+        for (i = 0; i < id; i++) {
+                if (sample_regs & (1 << i))
+                        idx++;
+        }
+
+        *valp = regs->regs[idx];
+        return 0;
+}
+
+static int access_mem(unw_addr_space_t __maybe_unused as,
+                      unw_word_t addr, unw_word_t *valp,
+                      int __write, void *arg)
+{
+        struct unwind_info *ui = arg;
+        struct stack_dump *stack = &ui->sample->user_stack;
+        unw_word_t start, end;
+        int offset;
+        int ret;
+
+        /* Don't support write, probably not needed. */
+        if (__write || !stack || !ui->sample->user_regs.regs) {
+                *valp = 0;
+                return 0;
+        }
+
+        ret = reg_value(&start, &ui->sample->user_regs, PERF_REG_SP,
+                        ui->sample_uregs);
+        if (ret)
+                return ret;
+
+        end = start + stack->size;
+
+        /* Check overflow. */
+        if (addr + sizeof(unw_word_t) < addr)
+                return -EINVAL;
+
+        if (addr < start || addr + sizeof(unw_word_t) >= end) {
+                ret = access_dso_mem(ui, addr, valp);
+                if (ret) {
+                        pr_debug("unwind: access_mem %p not inside range %p-%p\n",
+                                (void *)addr, (void *)start, (void *)end);
+                        *valp = 0;
+                        return ret;
+                }
+                return 0;
+        }
+
+        offset = addr - start;
+        *valp  = *(unw_word_t *)&stack->data[offset];
+        pr_debug("unwind: access_mem addr %p, val %lx, offset %d\n",
+                 (void *)addr, (unsigned long)*valp, offset);
+        return 0;
+}
+
+static int access_reg(unw_addr_space_t __maybe_unused as,
+                      unw_regnum_t regnum, unw_word_t *valp,
+                      int __write, void *arg)
+{
+        struct unwind_info *ui = arg;
+        int id, ret;
+
+        /* Don't support write, I suspect we don't need it. */
+        if (__write) {
+                pr_err("unwind: access_reg w %d\n", regnum);
+                return 0;
+        }
+
+        if (!ui->sample->user_regs.regs) {
+                *valp = 0;
+                return 0;
+        }
+
+        id = unwind__arch_reg_id(regnum);
+        if (id < 0)
+                return -EINVAL;
+
+        ret = reg_value(valp, &ui->sample->user_regs, id, ui->sample_uregs);
+        if (ret) {
+                pr_err("unwind: can't read reg %d\n", regnum);
+                return ret;
+        }
+
+        pr_debug("unwind: reg %d, val %lx\n", regnum, (unsigned long)*valp);
+        return 0;
+}
+
+static void put_unwind_info(unw_addr_space_t __maybe_unused as,
+                            unw_proc_info_t *pi __maybe_unused,
+                            void *arg __maybe_unused)
+{
+        pr_debug("unwind: put_unwind_info called\n");
+}
+
+static int entry(u64 ip, struct thread *thread, struct machine *machine,
+                 unwind_entry_cb_t cb, void *arg)
+{
+        struct unwind_entry e;
+        struct addr_location al;
+
+        thread__find_addr_location(thread, machine,
+                                   PERF_RECORD_MISC_USER,
+                                   MAP__FUNCTION, ip, &al, NULL);
+
+        e.ip = ip;
+        e.map = al.map;
+        e.sym = al.sym;
+
+        pr_debug("unwind: %s:ip = 0x%" PRIx64 " (0x%" PRIx64 ")\n",
+                 al.sym ? al.sym->name : "''",
+                 ip,
+                 al.map ? al.map->map_ip(al.map, ip) : (u64) 0);
+
+        return cb(&e, arg);
+}
+
+static void display_error(int err)
+{
+        switch (err) {
+        case UNW_EINVAL:
+                pr_err("unwind: Only supports local.\n");
+                break;
+        case UNW_EUNSPEC:
+                pr_err("unwind: Unspecified error.\n");
+                break;
+        case UNW_EBADREG:
+                pr_err("unwind: Register unavailable.\n");
+                break;
+        default:
+                break;
+        }
+}
+
+static unw_accessors_t accessors = {
+        .find_proc_info         = find_proc_info,
+        .put_unwind_info        = put_unwind_info,
+        .get_dyn_info_list_addr = get_dyn_info_list_addr,
+        .access_mem             = access_mem,
+        .access_reg             = access_reg,
+        .access_fpreg           = access_fpreg,
+        .resume                 = resume,
+        .get_proc_name          = get_proc_name,
+};
+
+static int get_entries(struct unwind_info *ui, unwind_entry_cb_t cb,
+                       void *arg)
+{
+        unw_addr_space_t addr_space;
+        unw_cursor_t c;
+        int ret;
+
+        addr_space = unw_create_addr_space(&accessors, 0);
+        if (!addr_space) {
+                pr_err("unwind: Can't create unwind address space.\n");
+                return -ENOMEM;
+        }
+
+        ret = unw_init_remote(&c, addr_space, ui);
+        if (ret)
+                display_error(ret);
+
+        while (!ret && (unw_step(&c) > 0)) {
+                unw_word_t ip;
+
+                unw_get_reg(&c, UNW_REG_IP, &ip);
+                ret = entry(ip, ui->thread, ui->machine, cb, arg);
+        }
+
+        unw_destroy_addr_space(addr_space);
+        return ret;
+}
+
+int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
+                        struct machine *machine, struct thread *thread,
+                        u64 sample_uregs, struct perf_sample *data)
+{
+        unw_word_t ip;
+        struct unwind_info ui = {
+                .sample       = data,
+                .sample_uregs = sample_uregs,
+                .thread       = thread,
+                .machine      = machine,
+        };
+        int ret;
+
+        if (!data->user_regs.regs)
+                return -EINVAL;
+
+        ret = reg_value(&ip, &data->user_regs, PERF_REG_IP, sample_uregs);
+        if (ret)
+                return ret;
+
+        ret = entry(ip, thread, machine, cb, arg);
+        if (ret)
+                return -ENOMEM;
+
+        return get_entries(&ui, cb, arg);
+}
diff --git a/tools/perf/util/unwind.h b/tools/perf/util/unwind.h
new file mode 100644
index 000000000000..a78c8b303bb5
--- /dev/null
+++ b/tools/perf/util/unwind.h
@@ -0,0 +1,35 @@
+#ifndef __UNWIND_H
+#define __UNWIND_H
+
+#include "types.h"
+#include "event.h"
+#include "symbol.h"
+
+struct unwind_entry {
+        struct map      *map;
+        struct symbol   *sym;
+        u64             ip;
+};
+
+typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
+
+#ifndef NO_LIBUNWIND_SUPPORT
+int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
+                        struct machine *machine,
+                        struct thread *thread,
+                        u64 sample_uregs,
+                        struct perf_sample *data);
+int unwind__arch_reg_id(int regnum);
+#else
+static inline int
+unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
+                    void *arg __maybe_unused,
+                    struct machine *machine __maybe_unused,
+                    struct thread *thread __maybe_unused,
+                    u64 sample_uregs __maybe_unused,
+                    struct perf_sample *data __maybe_unused)
+{
+        return 0;
+}
+#endif /* NO_LIBUNWIND_SUPPORT */
+#endif /* __UNWIND_H */
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index d03599fbe78b..2055cf38041c 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -1,6 +1,11 @@
 #include "../perf.h"
 #include "util.h"
 #include <sys/mman.h>
+#ifndef NO_BACKTRACE
+#include <execinfo.h>
+#endif
+#include <stdio.h>
+#include <stdlib.h>
 
 /*
  * XXX We need to find a better place for these things...
@@ -158,3 +163,23 @@ size_t hex_width(u64 v)
 
         return n;
 }
+
+/* Obtain a backtrace and print it to stdout. */
+#ifndef NO_BACKTRACE
+void dump_stack(void)
+{
+        void *array[16];
+        size_t size = backtrace(array, ARRAY_SIZE(array));
+        char **strings = backtrace_symbols(array, size);
+        size_t i;
+
+        printf("Obtained %zd stack frames.\n", size);
+
+        for (i = 0; i < size; i++)
+                printf("%s\n", strings[i]);
+
+        free(strings);
+}
+#else
+void dump_stack(void) {}
+#endif
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index b13c7331eaf8..70fa70b535b2 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -69,13 +69,8 @@
 #include <sys/poll.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
-#include <sys/select.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#include <arpa/inet.h>
-#include <netdb.h>
 #include <inttypes.h>
-#include "../../../include/linux/magic.h"
+#include <linux/magic.h>
 #include "types.h"
 #include <sys/ttydefaults.h>
 
@@ -266,4 +261,6 @@ size_t hex_width(u64 v);
 
 char *rtrim(char *s);
 
+void dump_stack(void);
+
 #endif
diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c
new file mode 100644
index 000000000000..e60951fcdb12
--- /dev/null
+++ b/tools/perf/util/vdso.c
@@ -0,0 +1,111 @@
+
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <linux/kernel.h>
+
+#include "vdso.h"
+#include "util.h"
+#include "symbol.h"
+#include "linux/string.h"
+
+static bool vdso_found;
+static char vdso_file[] = "/tmp/perf-vdso.so-XXXXXX";
+
+static int find_vdso_map(void **start, void **end)
+{
+        FILE *maps;
+        char line[128];
+        int found = 0;
+
+        maps = fopen("/proc/self/maps", "r");
+        if (!maps) {
+                pr_err("vdso: cannot open maps\n");
+                return -1;
+        }
+
+        while (!found && fgets(line, sizeof(line), maps)) {
+                int m = -1;
+
+                /* We care only about private r-x mappings. */
+                if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n",
+                                start, end, &m))
+                        continue;
+                if (m < 0)
+                        continue;
+
+                if (!strncmp(&line[m], VDSO__MAP_NAME,
+                             sizeof(VDSO__MAP_NAME) - 1))
+                        found = 1;
+        }
+
+        fclose(maps);
+        return !found;
+}
+
+static char *get_file(void)
+{
+        char *vdso = NULL;
+        char *buf = NULL;
+        void *start, *end;
+        size_t size;
+        int fd;
+
+        if (vdso_found)
+                return vdso_file;
+
+        if (find_vdso_map(&start, &end))
+                return NULL;
+
+        size = end - start;
+
+        buf = memdup(start, size);
+        if (!buf)
+                return NULL;
+
+        fd = mkstemp(vdso_file);
+        if (fd < 0)
+                goto out;
+
+        if (size == (size_t) write(fd, buf, size))
+                vdso = vdso_file;
+
+        close(fd);
+
+ out:
+        free(buf);
+
+        vdso_found = (vdso != NULL);
+        return vdso;
+}
+
+void vdso__exit(void)
+{
+        if (vdso_found)
+                unlink(vdso_file);
+}
+
+struct dso *vdso__dso_findnew(struct list_head *head)
+{
+        struct dso *dso = dsos__find(head, VDSO__MAP_NAME);
+
+        if (!dso) {
+                char *file;
+
+                file = get_file();
+                if (!file)
+                        return NULL;
+
+                dso = dso__new(VDSO__MAP_NAME);
+                if (dso != NULL) {
+                        dsos__add(head, dso);
+                        dso__set_long_name(dso, file);
+                }
+        }
+
+        return dso;
+}
diff --git a/tools/perf/util/vdso.h b/tools/perf/util/vdso.h
new file mode 100644
index 000000000000..0f76e7caf6f8
--- /dev/null
+++ b/tools/perf/util/vdso.h
@@ -0,0 +1,18 @@
+#ifndef __PERF_VDSO__
+#define __PERF_VDSO__
+
+#include <linux/types.h>
+#include <string.h>
+#include <stdbool.h>
+
+#define VDSO__MAP_NAME "[vdso]"
+
+static inline bool is_vdso_map(const char *filename)
+{
+        return !strcmp(filename, VDSO__MAP_NAME);
+}
+
+struct dso *vdso__dso_findnew(struct list_head *head);
+void vdso__exit(void);
+
+#endif /* __PERF_VDSO__ */
diff --git a/tools/perf/util/wrapper.c b/tools/perf/util/wrapper.c
index 73e900edb5a2..19f15b650703 100644
--- a/tools/perf/util/wrapper.c
+++ b/tools/perf/util/wrapper.c
@@ -7,7 +7,8 @@
  * There's no pack memory to release - but stay close to the Git
  * version so wrap this away:
  */
-static inline void release_pack_memory(size_t size __used, int flag __used)
+static inline void release_pack_memory(size_t size __maybe_unused,
+                                       int flag __maybe_unused)
 {
 }
 
diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
index bde8521d56bb..96ce80a3743b 100644
--- a/tools/scripts/Makefile.include
+++ b/tools/scripts/Makefile.include
@@ -1,6 +1,8 @@
 ifeq ("$(origin O)", "command line")
-        OUTPUT := $(O)/
-        COMMAND_O := O=$(O)
+        dummy := $(if $(shell test -d $(O) || echo $(O)),$(error O=$(O) does not exist),)
+        ABSOLUTE_O := $(shell cd $(O) ; pwd)
+        OUTPUT := $(ABSOLUTE_O)/
+        COMMAND_O := O=$(ABSOLUTE_O)
 endif
 
 ifneq ($(OUTPUT),)
diff --git a/tools/testing/ktest/examples/include/defaults.conf b/tools/testing/ktest/examples/include/defaults.conf
index 323a552ce642..63a1a83f4f0b 100644
--- a/tools/testing/ktest/examples/include/defaults.conf
+++ b/tools/testing/ktest/examples/include/defaults.conf
@@ -33,7 +33,7 @@ DEFAULTS
 THIS_DIR := ${PWD}
 
 
-# to orginize your configs, having each machine save their configs
+# to organize your configs, having each machine save their configs
 # into a separate directly is useful.
 CONFIG_DIR := ${THIS_DIR}/configs/${MACHINE}
 
diff --git a/tools/testing/ktest/examples/include/tests.conf b/tools/testing/ktest/examples/include/tests.conf
index 4fdb811bd810..60cedb1a1154 100644
--- a/tools/testing/ktest/examples/include/tests.conf
+++ b/tools/testing/ktest/examples/include/tests.conf
@@ -47,7 +47,7 @@ BUILD_NOCLEAN = 1
 # Build, install, boot and test with a randconfg 10 times.
 # It is important that you have set MIN_CONFIG in the config
 # that includes this file otherwise it is likely that the
-# randconfig will not have the neccessary configs needed to
+# randconfig will not have the necessary configs needed to
 # boot your box. This version of the test requires a min
 # config that has enough to make sure the target has network
 # working.
diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index 52b7959cd513..c05bcd293d8c 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -840,7 +840,9 @@ sub __read_config {
 
                 if ($rest =~ /\sIF\s+(.*)/) {
                     # May be a ELSE IF section.
-                    if (!process_if($name, $1)) {
+                    if (process_if($name, $1)) {
+                        $if_set = 1;
+                    } else {
                         $skip = 1;
                     }
                     $rest = "";
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 85baf11e2acd..43480149119e 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -1,4 +1,4 @@
-TARGETS = breakpoints kcmp mqueue vm cpu-hotplug memory-hotplug
+TARGETS = breakpoints kcmp mqueue vm cpu-hotplug memory-hotplug epoll
 
 all:
         for TARGET in $(TARGETS); do \
diff --git a/tools/testing/selftests/epoll/Makefile b/tools/testing/selftests/epoll/Makefile
new file mode 100644
index 000000000000..19806ed62f50
--- /dev/null
+++ b/tools/testing/selftests/epoll/Makefile
@@ -0,0 +1,11 @@
+# Makefile for epoll selftests
+
+all: test_epoll
+%: %.c
+        gcc -pthread -g -o $@ $^
+
+run_tests: all
+        ./test_epoll
+
+clean:
+        $(RM) test_epoll
diff --git a/tools/testing/selftests/epoll/test_epoll.c b/tools/testing/selftests/epoll/test_epoll.c
new file mode 100644
index 000000000000..e0fcff1e8331
--- /dev/null
+++ b/tools/testing/selftests/epoll/test_epoll.c
@@ -0,0 +1,344 @@
+/*
+ *  tools/testing/selftests/epoll/test_epoll.c
+ *
+ *  Copyright 2012 Adobe Systems Incorporated
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Paton J. Lewis <palewis@adobe.com>
+ *
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/epoll.h>
+#include <sys/socket.h>
+
+/*
+ * A pointer to an epoll_item_private structure will be stored in the epoll
+ * item's event structure so that we can get access to the epoll_item_private
+ * data after calling epoll_wait:
+ */
+struct epoll_item_private {
+        int index;  /* Position of this struct within the epoll_items array. */
+        int fd;
+        uint32_t events;
+        pthread_mutex_t mutex;  /* Guards the following variables... */
+        int stop;
+        int status;  /* Stores any error encountered while handling item. */
+        /* The following variable allows us to test whether we have encountered
+           a problem while attempting to cancel and delete the associated
+           event. When the test program exits, 'deleted' should be exactly
+           one. If it is greater than one, then the failed test reflects a real
+           world situation where we would have tried to access the epoll item's
+           private data after deleting it: */
+        int deleted;
+};
+
+struct epoll_item_private *epoll_items;
+
+/*
+ * Delete the specified item from the epoll set. In a real-world secneario this
+ * is where we would free the associated data structure, but in this testing
+ * environment we retain the structure so that we can test for double-deletion:
+ */
+void delete_item(int index)
+{
+        __sync_fetch_and_add(&epoll_items[index].deleted, 1);
+}
+
+/*
+ * A pointer to a read_thread_data structure will be passed as the argument to
+ * each read thread:
+ */
+struct read_thread_data {
+        int stop;
+        int status;  /* Indicates any error encountered by the read thread. */
+        int epoll_set;
+};
+
+/*
+ * The function executed by the read threads:
+ */
+void *read_thread_function(void *function_data)
+{
+        struct read_thread_data *thread_data =
+                (struct read_thread_data *)function_data;
+        struct epoll_event event_data;
+        struct epoll_item_private *item_data;
+        char socket_data;
+
+        /* Handle events until we encounter an error or this thread's 'stop'
+           condition is set: */
+        while (1) {
+                int result = epoll_wait(thread_data->epoll_set,
+                                        &event_data,
+                                        1,      /* Number of desired events */
+                                        1000);  /* Timeout in ms */
+                if (result < 0) {
+                        /* Breakpoints signal all threads. Ignore that while
+                           debugging: */
+                        if (errno == EINTR)
+                                continue;
+                        thread_data->status = errno;
+                        return 0;
+                } else if (thread_data->stop)
+                        return 0;
+                else if (result == 0)  /* Timeout */
+                        continue;
+
+                /* We need the mutex here because checking for the stop
+                   condition and re-enabling the epoll item need to be done
+                   together as one atomic operation when EPOLL_CTL_DISABLE is
+                   available: */
+                item_data = (struct epoll_item_private *)event_data.data.ptr;
+                pthread_mutex_lock(&item_data->mutex);
+
+                /* Remove the item from the epoll set if we want to stop
+                   handling that event: */
+                if (item_data->stop)
+                        delete_item(item_data->index);
+                else {
+                        /* Clear the data that was written to the other end of
+                           our non-blocking socket: */
+                        do {
+                                if (read(item_data->fd, &socket_data, 1) < 1) {
+                                        if ((errno == EAGAIN) ||
+                                            (errno == EWOULDBLOCK))
+                                                break;
+                                        else
+                                                goto error_unlock;
+                                }
+                        } while (item_data->events & EPOLLET);
+
+                        /* The item was one-shot, so re-enable it: */
+                        event_data.events = item_data->events;
+                        if (epoll_ctl(thread_data->epoll_set,
+                                                  EPOLL_CTL_MOD,
+                                                  item_data->fd,
+                                                  &event_data) < 0)
+                                goto error_unlock;
+                }
+
+                pthread_mutex_unlock(&item_data->mutex);
+        }
+
+error_unlock:
+        thread_data->status = item_data->status = errno;
+        pthread_mutex_unlock(&item_data->mutex);
+        return 0;
+}
+
+/*
+ * A pointer to a write_thread_data structure will be passed as the argument to
+ * the write thread:
+ */
+struct write_thread_data {
+        int stop;
+        int status;  /* Indicates any error encountered by the write thread. */
+        int n_fds;
+        int *fds;
+};
+
+/*
+ * The function executed by the write thread. It writes a single byte to each
+ * socket in turn until the stop condition for this thread is set. If writing to
+ * a socket would block (i.e. errno was EAGAIN), we leave that socket alone for
+ * the moment and just move on to the next socket in the list. We don't care
+ * about the order in which we deliver events to the epoll set. In fact we don't
+ * care about the data we're writing to the pipes at all; we just want to
+ * trigger epoll events:
+ */
+void *write_thread_function(void *function_data)
+{
+        const char data = 'X';
+        int index;
+        struct write_thread_data *thread_data =
+                (struct write_thread_data *)function_data;
+        while (!write_thread_data->stop)
+                for (index = 0;
+                     !thread_data->stop && (index < thread_data->n_fds);
+                     ++index)
+                        if ((write(thread_data->fds[index], &data, 1) < 1) &&
+                                (errno != EAGAIN) &&
+                                (errno != EWOULDBLOCK)) {
+                                write_thread_data->status = errno;
+                                return;
+                        }
+}
+
+/*
+ * Arguments are currently ignored:
+ */
+int main(int argc, char **argv)
+{
+        const int n_read_threads = 100;
+        const int n_epoll_items = 500;
+        int index;
+        int epoll_set = epoll_create1(0);
+        struct write_thread_data write_thread_data = {
+                0, 0, n_epoll_items, malloc(n_epoll_items * sizeof(int))
+        };
+        struct read_thread_data *read_thread_data =
+                malloc(n_read_threads * sizeof(struct read_thread_data));
+        pthread_t *read_threads = malloc(n_read_threads * sizeof(pthread_t));
+        pthread_t write_thread;
+
+        printf("-----------------\n");
+        printf("Runing test_epoll\n");
+        printf("-----------------\n");
+
+        epoll_items = malloc(n_epoll_items * sizeof(struct epoll_item_private));
+
+        if (epoll_set < 0 || epoll_items == 0 || write_thread_data.fds == 0 ||
+                read_thread_data == 0 || read_threads == 0)
+                goto error;
+
+        if (sysconf(_SC_NPROCESSORS_ONLN) < 2) {
+                printf("Error: please run this test on a multi-core system.\n");
+                goto error;
+        }
+
+        /* Create the socket pairs and epoll items: */
+        for (index = 0; index < n_epoll_items; ++index) {
+                int socket_pair[2];
+                struct epoll_event event_data;
+                if (socketpair(AF_UNIX,
+                               SOCK_STREAM | SOCK_NONBLOCK,
+                               0,
+                               socket_pair) < 0)
+                        goto error;
+                write_thread_data.fds[index] = socket_pair[0];
+                epoll_items[index].index = index;
+                epoll_items[index].fd = socket_pair[1];
+                if (pthread_mutex_init(&epoll_items[index].mutex, NULL) != 0)
+                        goto error;
+                /* We always use EPOLLONESHOT because this test is currently
+                   structured to demonstrate the need for EPOLL_CTL_DISABLE,
+                   which only produces useful information in the EPOLLONESHOT
+                   case (without EPOLLONESHOT, calling epoll_ctl with
+                   EPOLL_CTL_DISABLE will never return EBUSY). If support for
+                   testing events without EPOLLONESHOT is desired, it should
+                   probably be implemented in a separate unit test. */
+                epoll_items[index].events = EPOLLIN | EPOLLONESHOT;
+                if (index < n_epoll_items / 2)
+                        epoll_items[index].events |= EPOLLET;
+                epoll_items[index].stop = 0;
+                epoll_items[index].status = 0;
+                epoll_items[index].deleted = 0;
+                event_data.events = epoll_items[index].events;
+                event_data.data.ptr = &epoll_items[index];
+                if (epoll_ctl(epoll_set,
+                              EPOLL_CTL_ADD,
+                              epoll_items[index].fd,
+                              &event_data) < 0)
+                        goto error;
+        }
+
+        /* Create and start the read threads: */
+        for (index = 0; index < n_read_threads; ++index) {
+                read_thread_data[index].stop = 0;
+                read_thread_data[index].status = 0;
+                read_thread_data[index].epoll_set = epoll_set;
+                if (pthread_create(&read_threads[index],
+                                   NULL,
+                                   read_thread_function,
+                                   &read_thread_data[index]) != 0)
+                        goto error;
+        }
+
+        if (pthread_create(&write_thread,
+                           NULL,
+                           write_thread_function,
+                           &write_thread_data) != 0)
+                goto error;
+
+        /* Cancel all event pollers: */
+#ifdef EPOLL_CTL_DISABLE
+        for (index = 0; index < n_epoll_items; ++index) {
+                pthread_mutex_lock(&epoll_items[index].mutex);
+                ++epoll_items[index].stop;
+                if (epoll_ctl(epoll_set,
+                              EPOLL_CTL_DISABLE,
+                              epoll_items[index].fd,
+                              NULL) == 0)
+                        delete_item(index);
+                else if (errno != EBUSY) {
+                        pthread_mutex_unlock(&epoll_items[index].mutex);
+                        goto error;
+                }
+                /* EBUSY means events were being handled; allow the other thread
+                   to delete the item. */
+                pthread_mutex_unlock(&epoll_items[index].mutex);
+        }
+#else
+        for (index = 0; index < n_epoll_items; ++index) {
+                pthread_mutex_lock(&epoll_items[index].mutex);
+                ++epoll_items[index].stop;
+                pthread_mutex_unlock(&epoll_items[index].mutex);
+                /* Wait in case a thread running read_thread_function is
+                   currently executing code between epoll_wait and
+                   pthread_mutex_lock with this item. Note that a longer delay
+                   would make double-deletion less likely (at the expense of
+                   performance), but there is no guarantee that any delay would
+                   ever be sufficient. Note also that we delete all event
+                   pollers at once for testing purposes, but in a real-world
+                   environment we are likely to want to be able to cancel event
+                   pollers at arbitrary times. Therefore we can't improve this
+                   situation by just splitting this loop into two loops
+                   (i.e. signal 'stop' for all items, sleep, and then delete all
+                   items). We also can't fix the problem via EPOLL_CTL_DEL
+                   because that command can't prevent the case where some other
+                   thread is executing read_thread_function within the region
+                   mentioned above: */
+                usleep(1);
+                pthread_mutex_lock(&epoll_items[index].mutex);
+                if (!epoll_items[index].deleted)
+                        delete_item(index);
+                pthread_mutex_unlock(&epoll_items[index].mutex);
+        }
+#endif
+
+        /* Shut down the read threads: */
+        for (index = 0; index < n_read_threads; ++index)
+                __sync_fetch_and_add(&read_thread_data[index].stop, 1);
+        for (index = 0; index < n_read_threads; ++index) {
+                if (pthread_join(read_threads[index], NULL) != 0)
+                        goto error;
+                if (read_thread_data[index].status)
+                        goto error;
+        }
+
+        /* Shut down the write thread: */
+        __sync_fetch_and_add(&write_thread_data.stop, 1);
+        if ((pthread_join(write_thread, NULL) != 0) || write_thread_data.status)
+                goto error;
+
+        /* Check for final error conditions: */
+        for (index = 0; index < n_epoll_items; ++index) {
+                if (epoll_items[index].status != 0)
+                        goto error;
+                if (pthread_mutex_destroy(&epoll_items[index].mutex) < 0)
+                        goto error;
+        }
+        for (index = 0; index < n_epoll_items; ++index)
+                if (epoll_items[index].deleted != 1) {
+                        printf("Error: item data deleted %1d times.\n",
+                                   epoll_items[index].deleted);
+                        goto error;
+                }
+
+        printf("[PASS]\n");
+        return 0;
+
+ error:
+        printf("[FAIL]\n");
+        return errno;
+}
diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests
index 8b40bd5e5cc2..4c53cae6c273 100644
--- a/tools/testing/selftests/vm/run_vmtests
+++ b/tools/testing/selftests/vm/run_vmtests
@@ -36,7 +36,7 @@ mkdir $mnt
 mount -t hugetlbfs none $mnt
 
 echo "--------------------"
-echo "runing hugepage-mmap"
+echo "running hugepage-mmap"
 echo "--------------------"
 ./hugepage-mmap
 if [ $? -ne 0 ]; then
@@ -50,7 +50,7 @@ shmall=`cat /proc/sys/kernel/shmall`
 echo 268435456 > /proc/sys/kernel/shmmax
 echo 4194304 > /proc/sys/kernel/shmall
 echo "--------------------"
-echo "runing hugepage-shm"
+echo "running hugepage-shm"
 echo "--------------------"
 ./hugepage-shm
 if [ $? -ne 0 ]; then
@@ -62,7 +62,7 @@ echo $shmmax > /proc/sys/kernel/shmmax
 echo $shmall > /proc/sys/kernel/shmall
 
 echo "--------------------"
-echo "runing map_hugetlb"
+echo "running map_hugetlb"
 echo "--------------------"
 ./map_hugetlb
 if [ $? -ne 0 ]; then
diff --git a/tools/usb/testusb.c b/tools/usb/testusb.c
index b0adb2710c02..68d0734b2081 100644
--- a/tools/usb/testusb.c
+++ b/tools/usb/testusb.c
@@ -253,9 +253,6 @@ static int find_testdev(const char *name, const struct stat *sb, int flag)
 
         if (flag != FTW_F)
                 return 0;
-        /* ignore /proc/bus/usb/{devices,drivers} */
-        if (strrchr(name, '/')[1] == 'd')
-                return 0;
 
         fd = fopen(name, "rb");
         if (!fd) {
@@ -356,28 +353,8 @@ restart:
 
 static const char *usbfs_dir_find(void)
 {
-        static char usbfs_path_0[] = "/dev/usb/devices";
-        static char usbfs_path_1[] = "/proc/bus/usb/devices";
         static char udev_usb_path[] = "/dev/bus/usb";
 
-        static char *const usbfs_paths[] = {
-                usbfs_path_0, usbfs_path_1
-        };
-
-        static char *const *
-                end = usbfs_paths + sizeof usbfs_paths / sizeof *usbfs_paths;
-
-        char *const *it = usbfs_paths;
-        do {
-                int fd = open(*it, O_RDONLY);
-                close(fd);
-                if (fd >= 0) {
-                        strrchr(*it, '/')[0] = '\0';
-                        return *it;
-                }
-        } while (++it != end);
-
-        /* real device-nodes managed by udev */
         if (access(udev_usb_path, F_OK) == 0)
                 return udev_usb_path;
 
@@ -489,7 +466,7 @@ usage:
                 goto usage;
         if (!all && !device) {
                 fprintf (stderr, "must specify '-a' or '-D dev', "
-                        "or DEVICE=/proc/bus/usb/BBB/DDD in env\n");
+                        "or DEVICE=/dev/bus/usb/BBB/DDD in env\n");
                 goto usage;
         }