perf header: Add ->process callbacks to most of features

From now on each feature information is processed and saved in perf
header so that it can be used wherever needed.  The BRANCH_STACK feature
is an exception since it needs nothing to be done.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1348474503-15070-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 308 insertions, 11 deletions

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index ad72b2814ba..d74b58d4105 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -22,6 +22,7 @@
 #include "cpumap.h"
 #include "pmu.h"
 #include "vdso.h"
+#include "strbuf.h"
 
 static bool no_buildid_cache = false;
 
@@ -1673,6 +1674,99 @@ static int process_build_id(struct perf_file_section *section,
         return 0;
 }
 
+static int process_hostname(struct perf_file_section *section __maybe_unused,
+                            struct perf_header *ph, int feat __maybe_unused,
+                            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 feat __maybe_unused,
+                             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 feat __maybe_unused,
+                           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 feat __maybe_unused,
+                        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 feat __maybe_unused,
+                          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 feat __maybe_unused,
+                           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 feat __maybe_unused,
+                         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 feat __maybe_unused,
+                             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 char *read_cpuid(struct perf_header *ph, int fd)
 {
         return do_read_string(fd, ph);
@@ -1728,6 +1822,208 @@ process_event_desc(struct perf_file_section *section __maybe_unused,
         return 0;
 }
 
+static int process_cmdline(struct perf_file_section *section __maybe_unused,
+                           struct perf_header *ph, int feat __maybe_unused,
+                           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 feat __maybe_unused,
+                                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 feat __maybe_unused,
+                                 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 feat __maybe_unused,
+                                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);
@@ -1745,10 +2041,11 @@ 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 }
 #define FEAT_OPA_R(n, func) \
         [n] = { .name = #n, .write = write_##func, .print = print_##func, \
-                .read  = read_##func }
+                .read  = read_##func, .process = process_##func, \
+                .full_only = true }
 
 /* feature_ops not implemented: */
 #define print_tracing_data      NULL
@@ -1757,20 +2054,20 @@ 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_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_OPA_R(HEADER_CPUID,        cpuid),
-        FEAT_OPA(HEADER_TOTAL_MEM,      total_mem),
+        FEAT_OPP(HEADER_TOTAL_MEM,      total_mem),
         FEAT_OPP(HEADER_EVENT_DESC,     event_desc),
-        FEAT_OPA(HEADER_CMDLINE,        cmdline),
+        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_OPA(HEADER_PMU_MAPPINGS,   pmu_mappings),
+        FEAT_OPP(HEADER_PMU_MAPPINGS,   pmu_mappings),
 };
 
 struct header_print_data {