1 files changed, 531 insertions, 184 deletions

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 0c5e4f72f2ba..e2285e28720f 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -5,6 +5,53 @@
 #include "util/symbol.h"
 #include "util/thread.h"
 #include "util/header.h"
+#include "util/exec_cmd.h"
+#include "util/trace-event.h"
+#include "util/session.h"
+
+static char const               *script_name;
+static char const               *generate_script_lang;
+
+static int default_start_script(const char *script __unused,
+                                int argc __unused,
+                                const char **argv __unused)
+{
+        return 0;
+}
+
+static int default_stop_script(void)
+{
+        return 0;
+}
+
+static int default_generate_script(const char *outfile __unused)
+{
+        return 0;
+}
+
+static struct scripting_ops default_scripting_ops = {
+        .start_script           = default_start_script,
+        .stop_script            = default_stop_script,
+        .process_event          = print_event,
+        .generate_script        = default_generate_script,
+};
+
+static struct scripting_ops     *scripting_ops;
+
+static void setup_scripting(void)
+{
+        /* make sure PERF_EXEC_PATH is set for scripts */
+        perf_set_argv_exec_path(perf_exec_path());
+
+        setup_perl_scripting();
+
+        scripting_ops = &default_scripting_ops;
+}
+
+static int cleanup_scripting(void)
+{
+        return scripting_ops->stop_script();
+}
 
 #include "util/parse-options.h"
 
@@ -12,249 +59,457 @@
 #include "util/debug.h"
 
 #include "util/trace-event.h"
+#include "util/exec_cmd.h"
 
-static char             const *input_name = "perf.data";
-static int              input;
-static unsigned long    page_size;
-static unsigned long    mmap_window = 32;
+static char const               *input_name = "perf.data";
 
-static unsigned long    total = 0;
-static unsigned long    total_comm = 0;
+static int process_sample_event(event_t *event, struct perf_session *session)
+{
+        struct sample_data data;
+        struct thread *thread;
 
-static struct rb_root   threads;
-static struct thread    *last_match;
+        memset(&data, 0, sizeof(data));
+        data.time = -1;
+        data.cpu = -1;
+        data.period = 1;
 
-static struct perf_header *header;
-static u64              sample_type;
+        event__parse_sample(event, session->sample_type, &data);
 
+        dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
+                event->header.misc,
+                data.pid, data.tid,
+                (void *)(long)data.ip,
+                (long long)data.period);
 
-static int
-process_comm_event(event_t *event, unsigned long offset, unsigned long head)
-{
-        struct thread *thread;
+        thread = perf_session__findnew(session, event->ip.pid);
+        if (thread == NULL) {
+                pr_debug("problem processing %d event, skipping it.\n",
+                         event->header.type);
+                return -1;
+        }
 
-        thread = threads__findnew(event->comm.pid, &threads, &last_match);
+        if (session->sample_type & PERF_SAMPLE_RAW) {
+                /*
+                 * FIXME: better resolve from pid from the struct trace_entry
+                 * field, although it should be the same than this perf
+                 * event pid
+                 */
+                scripting_ops->process_event(data.cpu, data.raw_data,
+                                             data.raw_size,
+                                             data.time, thread->comm);
+        }
 
-        dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
-                (void *)(offset + head),
-                (void *)(long)(event->header.size),
-                event->comm.comm, event->comm.pid);
+        session->events_stats.total += data.period;
+        return 0;
+}
 
-        if (thread == NULL ||
-            thread__set_comm(thread, event->comm.comm)) {
-                dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
+static int sample_type_check(struct perf_session *session)
+{
+        if (!(session->sample_type & PERF_SAMPLE_RAW)) {
+                fprintf(stderr,
+                        "No trace sample to read. Did you call perf record "
+                        "without -R?");
                 return -1;
         }
-        total_comm++;
 
         return 0;
 }
 
-static int
-process_sample_event(event_t *event, unsigned long offset, unsigned long head)
+static struct perf_event_ops event_ops = {
+        .process_sample_event   = process_sample_event,
+        .process_comm_event     = event__process_comm,
+        .sample_type_check      = sample_type_check,
+};
+
+static int __cmd_trace(struct perf_session *session)
 {
-        char level;
-        int show = 0;
-        struct dso *dso = NULL;
-        struct thread *thread;
-        u64 ip = event->ip.ip;
-        u64 timestamp = -1;
-        u32 cpu = -1;
-        u64 period = 1;
-        void *more_data = event->ip.__more_data;
-        int cpumode;
-
-        thread = threads__findnew(event->ip.pid, &threads, &last_match);
-
-        if (sample_type & PERF_SAMPLE_TIME) {
-                timestamp = *(u64 *)more_data;
-                more_data += sizeof(u64);
-        }
+        return perf_session__process_events(session, &event_ops);
+}
 
-        if (sample_type & PERF_SAMPLE_CPU) {
-                cpu = *(u32 *)more_data;
-                more_data += sizeof(u32);
-                more_data += sizeof(u32); /* reserved */
-        }
+struct script_spec {
+        struct list_head        node;
+        struct scripting_ops    *ops;
+        char                    spec[0];
+};
+
+LIST_HEAD(script_specs);
 
-        if (sample_type & PERF_SAMPLE_PERIOD) {
-                period = *(u64 *)more_data;
-                more_data += sizeof(u64);
+static struct script_spec *script_spec__new(const char *spec,
+                                            struct scripting_ops *ops)
+{
+        struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
+
+        if (s != NULL) {
+                strcpy(s->spec, spec);
+                s->ops = ops;
         }
 
-        dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
-                (void *)(offset + head),
-                (void *)(long)(event->header.size),
-                event->header.misc,
-                event->ip.pid, event->ip.tid,
-                (void *)(long)ip,
-                (long long)period);
+        return s;
+}
 
-        dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
+static void script_spec__delete(struct script_spec *s)
+{
+        free(s->spec);
+        free(s);
+}
 
-        if (thread == NULL) {
-                eprintf("problem processing %d event, skipping it.\n",
-                        event->header.type);
-                return -1;
-        }
+static void script_spec__add(struct script_spec *s)
+{
+        list_add_tail(&s->node, &script_specs);
+}
 
-        cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
+static struct script_spec *script_spec__find(const char *spec)
+{
+        struct script_spec *s;
 
-        if (cpumode == PERF_RECORD_MISC_KERNEL) {
-                show = SHOW_KERNEL;
-                level = 'k';
+        list_for_each_entry(s, &script_specs, node)
+                if (strcasecmp(s->spec, spec) == 0)
+                        return s;
+        return NULL;
+}
 
-                dso = kernel_dso;
+static struct script_spec *script_spec__findnew(const char *spec,
+                                                struct scripting_ops *ops)
+{
+        struct script_spec *s = script_spec__find(spec);
 
-                dump_printf(" ...... dso: %s\n", dso->name);
+        if (s)
+                return s;
 
-        } else if (cpumode == PERF_RECORD_MISC_USER) {
+        s = script_spec__new(spec, ops);
+        if (!s)
+                goto out_delete_spec;
 
-                show = SHOW_USER;
-                level = '.';
+        script_spec__add(s);
 
-        } else {
-                show = SHOW_HV;
-                level = 'H';
+        return s;
 
-                dso = hypervisor_dso;
+out_delete_spec:
+        script_spec__delete(s);
 
-                dump_printf(" ...... dso: [hypervisor]\n");
-        }
+        return NULL;
+}
 
-        if (sample_type & PERF_SAMPLE_RAW) {
-                struct {
-                        u32 size;
-                        char data[0];
-                } *raw = more_data;
+int script_spec_register(const char *spec, struct scripting_ops *ops)
+{
+        struct script_spec *s;
 
-                /*
-                 * FIXME: better resolve from pid from the struct trace_entry
-                 * field, although it should be the same than this perf
-                 * event pid
-                 */
-                print_event(cpu, raw->data, raw->size, timestamp, thread->comm);
-        }
-        total += period;
+        s = script_spec__find(spec);
+        if (s)
+                return -1;
+
+        s = script_spec__findnew(spec, ops);
+        if (!s)
+                return -1;
 
         return 0;
 }
 
-static int
-process_event(event_t *event, unsigned long offset, unsigned long head)
+static struct scripting_ops *script_spec__lookup(const char *spec)
 {
-        trace_event(event);
+        struct script_spec *s = script_spec__find(spec);
+        if (!s)
+                return NULL;
 
-        switch (event->header.type) {
-        case PERF_RECORD_MMAP ... PERF_RECORD_LOST:
-                return 0;
+        return s->ops;
+}
 
-        case PERF_RECORD_COMM:
-                return process_comm_event(event, offset, head);
+static void list_available_languages(void)
+{
+        struct script_spec *s;
 
-        case PERF_RECORD_EXIT ... PERF_RECORD_READ:
-                return 0;
+        fprintf(stderr, "\n");
+        fprintf(stderr, "Scripting language extensions (used in "
+                "perf trace -s [spec:]script.[spec]):\n\n");
 
-        case PERF_RECORD_SAMPLE:
-                return process_sample_event(event, offset, head);
+        list_for_each_entry(s, &script_specs, node)
+                fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
 
-        case PERF_RECORD_MAX:
-        default:
-                return -1;
+        fprintf(stderr, "\n");
+}
+
+static int parse_scriptname(const struct option *opt __used,
+                            const char *str, int unset __used)
+{
+        char spec[PATH_MAX];
+        const char *script, *ext;
+        int len;
+
+        if (strcmp(str, "list") == 0) {
+                list_available_languages();
+                return 0;
+        }
+
+        script = strchr(str, ':');
+        if (script) {
+                len = script - str;
+                if (len >= PATH_MAX) {
+                        fprintf(stderr, "invalid language specifier");
+                        return -1;
+                }
+                strncpy(spec, str, len);
+                spec[len] = '\0';
+                scripting_ops = script_spec__lookup(spec);
+                if (!scripting_ops) {
+                        fprintf(stderr, "invalid language specifier");
+                        return -1;
+                }
+                script++;
+        } else {
+                script = str;
+                ext = strchr(script, '.');
+                if (!ext) {
+                        fprintf(stderr, "invalid script extension");
+                        return -1;
+                }
+                scripting_ops = script_spec__lookup(++ext);
+                if (!scripting_ops) {
+                        fprintf(stderr, "invalid script extension");
+                        return -1;
+                }
         }
 
+        script_name = strdup(script);
+
         return 0;
 }
 
-static int __cmd_trace(void)
+#define for_each_lang(scripts_dir, lang_dirent, lang_next)              \
+        while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&     \
+               lang_next)                                               \
+                if (lang_dirent.d_type == DT_DIR &&                     \
+                    (strcmp(lang_dirent.d_name, ".")) &&                \
+                    (strcmp(lang_dirent.d_name, "..")))
+
+#define for_each_script(lang_dir, script_dirent, script_next)           \
+        while (!readdir_r(lang_dir, &script_dirent, &script_next) &&    \
+               script_next)                                             \
+                if (script_dirent.d_type != DT_DIR)
+
+
+#define RECORD_SUFFIX                   "-record"
+#define REPORT_SUFFIX                   "-report"
+
+struct script_desc {
+        struct list_head        node;
+        char                    *name;
+        char                    *half_liner;
+        char                    *args;
+};
+
+LIST_HEAD(script_descs);
+
+static struct script_desc *script_desc__new(const char *name)
 {
-        int ret, rc = EXIT_FAILURE;
-        unsigned long offset = 0;
-        unsigned long head = 0;
-        struct stat perf_stat;
-        event_t *event;
-        uint32_t size;
-        char *buf;
-
-        trace_report();
-        register_idle_thread(&threads, &last_match);
-
-        input = open(input_name, O_RDONLY);
-        if (input < 0) {
-                perror("failed to open file");
-                exit(-1);
-        }
+        struct script_desc *s = zalloc(sizeof(*s));
 
-        ret = fstat(input, &perf_stat);
-        if (ret < 0) {
-                perror("failed to stat file");
-                exit(-1);
-        }
+        if (s != NULL)
+                s->name = strdup(name);
 
-        if (!perf_stat.st_size) {
-                fprintf(stderr, "zero-sized file, nothing to do!\n");
-                exit(0);
-        }
-        header = perf_header__read(input);
-        head = header->data_offset;
-        sample_type = perf_header__sample_type(header);
+        return s;
+}
+
+static void script_desc__delete(struct script_desc *s)
+{
+        free(s->name);
+        free(s);
+}
+
+static void script_desc__add(struct script_desc *s)
+{
+        list_add_tail(&s->node, &script_descs);
+}
+
+static struct script_desc *script_desc__find(const char *name)
+{
+        struct script_desc *s;
+
+        list_for_each_entry(s, &script_descs, node)
+                if (strcasecmp(s->name, name) == 0)
+                        return s;
+        return NULL;
+}
+
+static struct script_desc *script_desc__findnew(const char *name)
+{
+        struct script_desc *s = script_desc__find(name);
+
+        if (s)
+                return s;
+
+        s = script_desc__new(name);
+        if (!s)
+                goto out_delete_desc;
+
+        script_desc__add(s);
 
-        if (!(sample_type & PERF_SAMPLE_RAW))
-                die("No trace sample to read. Did you call perf record "
-                    "without -R?");
+        return s;
 
-        if (load_kernel() < 0) {
-                perror("failed to load kernel symbols");
-                return EXIT_FAILURE;
+out_delete_desc:
+        script_desc__delete(s);
+
+        return NULL;
+}
+
+static char *ends_with(char *str, const char *suffix)
+{
+        size_t suffix_len = strlen(suffix);
+        char *p = str;
+
+        if (strlen(str) > suffix_len) {
+                p = str + strlen(str) - suffix_len;
+                if (!strncmp(p, suffix, suffix_len))
+                        return p;
         }
 
-remap:
-        buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
-                           MAP_SHARED, input, offset);
-        if (buf == MAP_FAILED) {
-                perror("failed to mmap file");
-                exit(-1);
+        return NULL;
+}
+
+static char *ltrim(char *str)
+{
+        int len = strlen(str);
+
+        while (len && isspace(*str)) {
+                len--;
+                str++;
         }
 
-more:
-        event = (event_t *)(buf + head);
+        return str;
+}
 
-        if (head + event->header.size >= page_size * mmap_window) {
-                unsigned long shift = page_size * (head / page_size);
-                int res;
+static int read_script_info(struct script_desc *desc, const char *filename)
+{
+        char line[BUFSIZ], *p;
+        FILE *fp;
 
-                res = munmap(buf, page_size * mmap_window);
-                assert(res == 0);
+        fp = fopen(filename, "r");
+        if (!fp)
+                return -1;
 
-                offset += shift;
-                head -= shift;
-                goto remap;
+        while (fgets(line, sizeof(line), fp)) {
+                p = ltrim(line);
+                if (strlen(p) == 0)
+                        continue;
+                if (*p != '#')
+                        continue;
+                p++;
+                if (strlen(p) && *p == '!')
+                        continue;
+
+                p = ltrim(p);
+                if (strlen(p) && p[strlen(p) - 1] == '\n')
+                        p[strlen(p) - 1] = '\0';
+
+                if (!strncmp(p, "description:", strlen("description:"))) {
+                        p += strlen("description:");
+                        desc->half_liner = strdup(ltrim(p));
+                        continue;
+                }
+
+                if (!strncmp(p, "args:", strlen("args:"))) {
+                        p += strlen("args:");
+                        desc->args = strdup(ltrim(p));
+                        continue;
+                }
         }
 
-        size = event->header.size;
+        fclose(fp);
 
-        if (!size || process_event(event, offset, head) < 0) {
-
-                /*
-                 * assume we lost track of the stream, check alignment, and
-                 * increment a single u64 in the hope to catch on again 'soon'.
-                 */
+        return 0;
+}
 
-                if (unlikely(head & 7))
-                        head &= ~7ULL;
+static int list_available_scripts(const struct option *opt __used,
+                                  const char *s __used, int unset __used)
+{
+        struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
+        char scripts_path[MAXPATHLEN];
+        DIR *scripts_dir, *lang_dir;
+        char script_path[MAXPATHLEN];
+        char lang_path[MAXPATHLEN];
+        struct script_desc *desc;
+        char first_half[BUFSIZ];
+        char *script_root;
+        char *str;
+
+        snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
+
+        scripts_dir = opendir(scripts_path);
+        if (!scripts_dir)
+                return -1;
 
-                size = 8;
+        for_each_lang(scripts_dir, lang_dirent, lang_next) {
+                snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
+                         lang_dirent.d_name);
+                lang_dir = opendir(lang_path);
+                if (!lang_dir)
+                        continue;
+
+                for_each_script(lang_dir, script_dirent, script_next) {
+                        script_root = strdup(script_dirent.d_name);
+                        str = ends_with(script_root, REPORT_SUFFIX);
+                        if (str) {
+                                *str = '\0';
+                                desc = script_desc__findnew(script_root);
+                                snprintf(script_path, MAXPATHLEN, "%s/%s",
+                                         lang_path, script_dirent.d_name);
+                                read_script_info(desc, script_path);
+                        }
+                        free(script_root);
+                }
         }
 
-        head += size;
+        fprintf(stdout, "List of available trace scripts:\n");
+        list_for_each_entry(desc, &script_descs, node) {
+                sprintf(first_half, "%s %s", desc->name,
+                        desc->args ? desc->args : "");
+                fprintf(stdout, "  %-36s %s\n", first_half,
+                        desc->half_liner ? desc->half_liner : "");
+        }
 
-        if (offset + head < (unsigned long)perf_stat.st_size)
-                goto more;
+        exit(0);
+}
 
-        rc = EXIT_SUCCESS;
-        close(input);
+static char *get_script_path(const char *script_root, const char *suffix)
+{
+        struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
+        char scripts_path[MAXPATHLEN];
+        char script_path[MAXPATHLEN];
+        DIR *scripts_dir, *lang_dir;
+        char lang_path[MAXPATHLEN];
+        char *str, *__script_root;
+        char *path = NULL;
+
+        snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
+
+        scripts_dir = opendir(scripts_path);
+        if (!scripts_dir)
+                return NULL;
+
+        for_each_lang(scripts_dir, lang_dirent, lang_next) {
+                snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
+                         lang_dirent.d_name);
+                lang_dir = opendir(lang_path);
+                if (!lang_dir)
+                        continue;
+
+                for_each_script(lang_dir, script_dirent, script_next) {
+                        __script_root = strdup(script_dirent.d_name);
+                        str = ends_with(__script_root, suffix);
+                        if (str) {
+                                *str = '\0';
+                                if (strcmp(__script_root, script_root))
+                                        continue;
+                                snprintf(script_path, MAXPATHLEN, "%s/%s",
+                                         lang_path, script_dirent.d_name);
+                                path = strdup(script_path);
+                                free(__script_root);
+                                break;
+                        }
+                        free(__script_root);
+                }
+        }
 
-        return rc;
+        return path;
 }
 
 static const char * const annotate_usage[] = {
@@ -267,25 +522,117 @@ static const struct option options[] = {
                     "dump raw trace in ASCII"),
         OPT_BOOLEAN('v', "verbose", &verbose,
                     "be more verbose (show symbol address, etc)"),
+        OPT_BOOLEAN('L', "Latency", &latency_format,
+                    "show latency attributes (irqs/preemption disabled, etc)"),
+        OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
+                           list_available_scripts),
+        OPT_CALLBACK('s', "script", NULL, "name",
+                     "script file name (lang:script name, script name, or *)",
+                     parse_scriptname),
+        OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
+                   "generate perf-trace.xx script in specified language"),
+
         OPT_END()
 };
 
 int cmd_trace(int argc, const char **argv, const char *prefix __used)
 {
-        symbol__init();
-        page_size = getpagesize();
+        struct perf_session *session;
+        const char *suffix = NULL;
+        const char **__argv;
+        char *script_path;
+        int i, err;
+
+        if (argc >= 2 && strncmp(argv[1], "rec", strlen("rec")) == 0) {
+                if (argc < 3) {
+                        fprintf(stderr,
+                                "Please specify a record script\n");
+                        return -1;
+                }
+                suffix = RECORD_SUFFIX;
+        }
 
-        argc = parse_options(argc, argv, options, annotate_usage, 0);
-        if (argc) {
-                /*
-                 * Special case: if there's an argument left then assume tha
-                 * it's a symbol filter:
-                 */
-                if (argc > 1)
-                        usage_with_options(annotate_usage, options);
+        if (argc >= 2 && strncmp(argv[1], "rep", strlen("rep")) == 0) {
+                if (argc < 3) {
+                        fprintf(stderr,
+                                "Please specify a report script\n");
+                        return -1;
+                }
+                suffix = REPORT_SUFFIX;
         }
 
+        if (suffix) {
+                script_path = get_script_path(argv[2], suffix);
+                if (!script_path) {
+                        fprintf(stderr, "script not found\n");
+                        return -1;
+                }
+
+                __argv = malloc((argc + 1) * sizeof(const char *));
+                __argv[0] = "/bin/sh";
+                __argv[1] = script_path;
+                for (i = 3; i < argc; i++)
+                        __argv[i - 1] = argv[i];
+                __argv[argc - 1] = NULL;
+
+                execvp("/bin/sh", (char **)__argv);
+                exit(-1);
+        }
+
+        setup_scripting();
+
+        argc = parse_options(argc, argv, options, annotate_usage,
+                             PARSE_OPT_STOP_AT_NON_OPTION);
+
+        if (symbol__init() < 0)
+                return -1;
         setup_pager();
 
-        return __cmd_trace();
+        session = perf_session__new(input_name, O_RDONLY, 0);
+        if (session == NULL)
+                return -ENOMEM;
+
+        if (generate_script_lang) {
+                struct stat perf_stat;
+
+                int input = open(input_name, O_RDONLY);
+                if (input < 0) {
+                        perror("failed to open file");
+                        exit(-1);
+                }
+
+                err = fstat(input, &perf_stat);
+                if (err < 0) {
+                        perror("failed to stat file");
+                        exit(-1);
+                }
+
+                if (!perf_stat.st_size) {
+                        fprintf(stderr, "zero-sized file, nothing to do!\n");
+                        exit(0);
+                }
+
+                scripting_ops = script_spec__lookup(generate_script_lang);
+                if (!scripting_ops) {
+                        fprintf(stderr, "invalid language specifier");
+                        return -1;
+                }
+
+                perf_header__read(&session->header, input);
+                err = scripting_ops->generate_script("perf-trace");
+                goto out;
+        }
+
+        if (script_name) {
+                err = scripting_ops->start_script(script_name, argc, argv);
+                if (err)
+                        goto out;
+        }
+
+        err = __cmd_trace(session);
+
+        perf_session__delete(session);
+        cleanup_scripting();
+out:
+        return err;
 }