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Jelly Bean
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4.1.1_r1
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external
linux-tools-perf
builtin-script.c
#include "builtin.h" #include "perf.h" #include "util/cache.h" #include "util/debug.h" #include "util/exec_cmd.h" #include "util/header.h" #include "util/parse-options.h" #include "util/session.h" #include "util/symbol.h" #include "util/thread.h" #include "util/trace-event.h" #include "util/util.h" #include "util/evlist.h" #include "util/evsel.h" static char const *script_name; static char const *generate_script_lang; static bool debug_mode; static u64 last_timestamp; static u64 nr_unordered; extern const struct option record_options[]; static bool no_callchain; enum perf_output_field { PERF_OUTPUT_COMM = 1U << 0, PERF_OUTPUT_TID = 1U << 1, PERF_OUTPUT_PID = 1U << 2, PERF_OUTPUT_TIME = 1U << 3, PERF_OUTPUT_CPU = 1U << 4, PERF_OUTPUT_EVNAME = 1U << 5, PERF_OUTPUT_TRACE = 1U << 6, PERF_OUTPUT_SYM = 1U << 7, }; struct output_option { const char *str; enum perf_output_field field; } all_output_options[] = { {.str = "comm", .field = PERF_OUTPUT_COMM}, {.str = "tid", .field = PERF_OUTPUT_TID}, {.str = "pid", .field = PERF_OUTPUT_PID}, {.str = "time", .field = PERF_OUTPUT_TIME}, {.str = "cpu", .field = PERF_OUTPUT_CPU}, {.str = "event", .field = PERF_OUTPUT_EVNAME}, {.str = "trace", .field = PERF_OUTPUT_TRACE}, {.str = "sym", .field = PERF_OUTPUT_SYM}, }; /* default set to maintain compatibility with current format */ static struct { bool user_set; bool wildcard_set; u64 fields; u64 invalid_fields; } output[PERF_TYPE_MAX] = { [PERF_TYPE_HARDWARE] = { .user_set = false, .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID | PERF_OUTPUT_CPU | PERF_OUTPUT_TIME | PERF_OUTPUT_EVNAME | PERF_OUTPUT_SYM, .invalid_fields = PERF_OUTPUT_TRACE, }, [PERF_TYPE_SOFTWARE] = { .user_set = false, .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID | PERF_OUTPUT_CPU | PERF_OUTPUT_TIME | PERF_OUTPUT_EVNAME | PERF_OUTPUT_SYM, .invalid_fields = PERF_OUTPUT_TRACE, }, [PERF_TYPE_TRACEPOINT] = { .user_set = false, .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID | PERF_OUTPUT_CPU | PERF_OUTPUT_TIME | PERF_OUTPUT_EVNAME | PERF_OUTPUT_TRACE, }, [PERF_TYPE_RAW] = { .user_set = false, .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID | PERF_OUTPUT_CPU | PERF_OUTPUT_TIME | PERF_OUTPUT_EVNAME | PERF_OUTPUT_SYM, .invalid_fields = PERF_OUTPUT_TRACE, }, }; static bool output_set_by_user(void) { int j; for (j = 0; j < PERF_TYPE_MAX; ++j) { if (output[j].user_set) return true; } return false; } static const char *output_field2str(enum perf_output_field field) { int i, imax = ARRAY_SIZE(all_output_options); const char *str = ""; for (i = 0; i < imax; ++i) { if (all_output_options[i].field == field) { str = all_output_options[i].str; break; } } return str; } #define PRINT_FIELD(x) (output[attr->type].fields & PERF_OUTPUT_##x) static int perf_event_attr__check_stype(struct perf_event_attr *attr, u64 sample_type, const char *sample_msg, enum perf_output_field field) { int type = attr->type; const char *evname; if (attr->sample_type & sample_type) return 0; if (output[type].user_set) { evname = __event_name(attr->type, attr->config); pr_err("Samples for '%s' event do not have %s attribute set. " "Cannot print '%s' field.\n", evname, sample_msg, output_field2str(field)); return -1; } /* user did not ask for it explicitly so remove from the default list */ output[type].fields &= ~field; evname = __event_name(attr->type, attr->config); pr_debug("Samples for '%s' event do not have %s attribute set. " "Skipping '%s' field.\n", evname, sample_msg, output_field2str(field)); return 0; } static int perf_evsel__check_attr(struct perf_evsel *evsel, struct perf_session *session) { struct perf_event_attr *attr = &evsel->attr; if (PRINT_FIELD(TRACE) && !perf_session__has_traces(session, "record -R")) return -EINVAL; if (PRINT_FIELD(SYM)) { if (perf_event_attr__check_stype(attr, PERF_SAMPLE_IP, "IP", PERF_OUTPUT_SYM)) return -EINVAL; if (!no_callchain && !(attr->sample_type & PERF_SAMPLE_CALLCHAIN)) symbol_conf.use_callchain = false; } if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) && perf_event_attr__check_stype(attr, PERF_SAMPLE_TID, "TID", PERF_OUTPUT_TID|PERF_OUTPUT_PID)) return -EINVAL; if (PRINT_FIELD(TIME) && perf_event_attr__check_stype(attr, PERF_SAMPLE_TIME, "TIME", PERF_OUTPUT_TIME)) return -EINVAL; if (PRINT_FIELD(CPU) && perf_event_attr__check_stype(attr, PERF_SAMPLE_CPU, "CPU", PERF_OUTPUT_CPU)) return -EINVAL; return 0; } /* * verify all user requested events exist and the samples * have the expected data */ static int perf_session__check_output_opt(struct perf_session *session) { int j; struct perf_evsel *evsel; for (j = 0; j < PERF_TYPE_MAX; ++j) { evsel = perf_session__find_first_evtype(session, j); /* * even if fields is set to 0 (ie., show nothing) event must * exist if user explicitly includes it on the command line */ if (!evsel && output[j].user_set && !output[j].wildcard_set) { pr_err("%s events do not exist. " "Remove corresponding -f option to proceed.\n", event_type(j)); return -1; } if (evsel && output[j].fields && perf_evsel__check_attr(evsel, session)) return -1; } return 0; } static void print_sample_start(struct perf_sample *sample, struct thread *thread, struct perf_event_attr *attr) { int type; struct event *event; const char *evname = NULL; unsigned long secs; unsigned long usecs; unsigned long long nsecs; if (PRINT_FIELD(COMM)) { if (latency_format) printf("%8.8s ", thread->comm); else if (PRINT_FIELD(SYM) && symbol_conf.use_callchain) printf("%s ", thread->comm); else printf("%16s ", thread->comm); } if (PRINT_FIELD(PID) && PRINT_FIELD(TID)) printf("%5d/%-5d ", sample->pid, sample->tid); else if (PRINT_FIELD(PID)) printf("%5d ", sample->pid); else if (PRINT_FIELD(TID)) printf("%5d ", sample->tid); if (PRINT_FIELD(CPU)) { if (latency_format) printf("%3d ", sample->cpu); else printf("[%03d] ", sample->cpu); } if (PRINT_FIELD(TIME)) { nsecs = sample->time; secs = nsecs / NSECS_PER_SEC; nsecs -= secs * NSECS_PER_SEC; usecs = nsecs / NSECS_PER_USEC; printf("%5lu.%06lu: ", secs, usecs); } if (PRINT_FIELD(EVNAME)) { if (attr->type == PERF_TYPE_TRACEPOINT) { type = trace_parse_common_type(sample->raw_data); event = trace_find_event(type); if (event) evname = event->name; } else evname = __event_name(attr->type, attr->config); printf("%s: ", evname ? evname : "(unknown)"); } } static void process_event(union perf_event *event __unused, struct perf_sample *sample, struct perf_evsel *evsel, struct perf_session *session, struct thread *thread) { struct perf_event_attr *attr = &evsel->attr; if (output[attr->type].fields == 0) return; print_sample_start(sample, thread, attr); if (PRINT_FIELD(TRACE)) print_trace_event(sample->cpu, sample->raw_data, sample->raw_size); if (PRINT_FIELD(SYM)) { if (!symbol_conf.use_callchain) printf(" "); else printf("\n"); perf_session__print_symbols(event, sample, session); } printf("\n"); } 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 = process_event, .generate_script = default_generate_script, }; static struct scripting_ops *scripting_ops; static void setup_scripting(void) { setup_perl_scripting(); setup_python_scripting(); scripting_ops = &default_scripting_ops; } static int cleanup_scripting(void) { pr_debug("\nperf script stopped\n"); return scripting_ops->stop_script(); } static char const *input_name = "perf.data"; static int process_sample_event(union perf_event *event, struct perf_sample *sample, struct perf_evsel *evsel, struct perf_session *session) { struct 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; } if (debug_mode) { if (sample->time < last_timestamp) { pr_err("Samples misordered, previous: %" PRIu64 " this: %" PRIu64 "\n", last_timestamp, sample->time); nr_unordered++; } last_timestamp = sample->time; return 0; } scripting_ops->process_event(event, sample, evsel, session, thread); session->hists.stats.total_period += sample->period; return 0; } static struct perf_event_ops event_ops = { .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) { session_done = 1; } static int __cmd_script(struct perf_session *session) { int ret; signal(SIGINT, sig_handler); ret = perf_session__process_events(session, &event_ops); if (debug_mode) pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered); return ret; } struct script_spec { struct list_head node; struct scripting_ops *ops; char spec[0]; }; static LIST_HEAD(script_specs); 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; } return s; } static void script_spec__delete(struct script_spec *s) { free(s->spec); free(s); } static void script_spec__add(struct script_spec *s) { list_add_tail(&s->node, &script_specs); } static struct script_spec *script_spec__find(const char *spec) { struct script_spec *s; list_for_each_entry(s, &script_specs, node) if (strcasecmp(s->spec, spec) == 0) return s; return NULL; } static struct script_spec *script_spec__findnew(const char *spec, struct scripting_ops *ops) { struct script_spec *s = script_spec__find(spec); if (s) return s; s = script_spec__new(spec, ops); if (!s) goto out_delete_spec; script_spec__add(s); return s; out_delete_spec: script_spec__delete(s); return NULL; } int script_spec_register(const char *spec, struct scripting_ops *ops) { struct script_spec *s; s = script_spec__find(spec); if (s) return -1; s = script_spec__findnew(spec, ops); if (!s) return -1; return 0; } static struct scripting_ops *script_spec__lookup(const char *spec) { struct script_spec *s = script_spec__find(spec); if (!s) return NULL; return s->ops; } static void list_available_languages(void) { struct script_spec *s; fprintf(stderr, "\n"); fprintf(stderr, "Scripting language extensions (used in " "perf script -s [spec:]script.[spec]):\n\n"); list_for_each_entry(s, &script_specs, node) fprintf(stderr, " %-42s [%s]\n", s->spec, s->ops->name); 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, "lang") == 0) { list_available_languages(); exit(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 = strrchr(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 parse_output_fields(const struct option *opt __used, const char *arg, int unset __used) { char *tok; int i, imax = sizeof(all_output_options) / sizeof(struct output_option); int j; int rc = 0; char *str = strdup(arg); int type = -1; if (!str) return -ENOMEM; /* first word can state for which event type the user is specifying * the fields. If no type exists, the specified fields apply to all * event types found in the file minus the invalid fields for a type. */ tok = strchr(str, ':'); if (tok) { *tok = '\0'; tok++; if (!strcmp(str, "hw")) type = PERF_TYPE_HARDWARE; else if (!strcmp(str, "sw")) type = PERF_TYPE_SOFTWARE; else if (!strcmp(str, "trace")) type = PERF_TYPE_TRACEPOINT; else if (!strcmp(str, "raw")) type = PERF_TYPE_RAW; else { fprintf(stderr, "Invalid event type in field string.\n"); return -EINVAL; } if (output[type].user_set) pr_warning("Overriding previous field request for %s events.\n", event_type(type)); output[type].fields = 0; output[type].user_set = true; output[type].wildcard_set = false; } else { tok = str; if (strlen(str) == 0) { fprintf(stderr, "Cannot set fields to 'none' for all event types.\n"); rc = -EINVAL; goto out; } if (output_set_by_user()) pr_warning("Overriding previous field request for all events.\n"); for (j = 0; j < PERF_TYPE_MAX; ++j) { output[j].fields = 0; output[j].user_set = true; output[j].wildcard_set = true; } } tok = strtok(tok, ","); while (tok) { for (i = 0; i < imax; ++i) { if (strcmp(tok, all_output_options[i].str) == 0) break; } if (i == imax) { fprintf(stderr, "Invalid field requested.\n"); rc = -EINVAL; goto out; } if (type == -1) { /* add user option to all events types for * which it is valid */ for (j = 0; j < PERF_TYPE_MAX; ++j) { if (output[j].invalid_fields & all_output_options[i].field) { pr_warning("\'%s\' not valid for %s events. Ignoring.\n", all_output_options[i].str, event_type(j)); } else output[j].fields |= all_output_options[i].field; } } else { if (output[type].invalid_fields & all_output_options[i].field) { fprintf(stderr, "\'%s\' not valid for %s events.\n", all_output_options[i].str, event_type(type)); rc = -EINVAL; goto out; } output[type].fields |= all_output_options[i].field; } tok = strtok(NULL, ","); } if (type >= 0) { if (output[type].fields == 0) { pr_debug("No fields requested for %s type. " "Events will not be displayed.\n", event_type(type)); } } out: free(str); return rc; } /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */ static int is_directory(const char *base_path, const struct dirent *dent) { char path[PATH_MAX]; struct stat st; sprintf(path, "%s/%s", base_path, dent->d_name); if (stat(path, &st)) return 0; return S_ISDIR(st.st_mode); } #define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\ while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) && \ lang_next) \ if ((lang_dirent.d_type == DT_DIR || \ (lang_dirent.d_type == DT_UNKNOWN && \ is_directory(scripts_path, &lang_dirent))) && \ (strcmp(lang_dirent.d_name, ".")) && \ (strcmp(lang_dirent.d_name, ".."))) #define for_each_script(lang_path, lang_dir, script_dirent, script_next)\ while (!readdir_r(lang_dir, &script_dirent, &script_next) && \ script_next) \ if (script_dirent.d_type != DT_DIR && \ (script_dirent.d_type != DT_UNKNOWN || \ !is_directory(lang_path, &script_dirent))) #define RECORD_SUFFIX "-record" #define REPORT_SUFFIX "-report" struct script_desc { struct list_head node; char *name; char *half_liner; char *args; }; static LIST_HEAD(script_descs); static struct script_desc *script_desc__new(const char *name) { struct script_desc *s = zalloc(sizeof(*s)); if (s != NULL && name) s->name = strdup(name); return s; } static void script_desc__delete(struct script_desc *s) { free(s->name); free(s->half_liner); free(s->args); 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); return s; out_delete_desc: script_desc__delete(s); return NULL; } static const char *ends_with(const char *str, const char *suffix) { size_t suffix_len = strlen(suffix); const char *p = str; if (strlen(str) > suffix_len) { p = str + strlen(str) - suffix_len; if (!strncmp(p, suffix, suffix_len)) return p; } return NULL; } static char *ltrim(char *str) { int len = strlen(str); while (len && isspace(*str)) { len--; str++; } return str; } static int read_script_info(struct script_desc *desc, const char *filename) { char line[BUFSIZ], *p; FILE *fp; fp = fopen(filename, "r"); if (!fp) return -1; 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; } } fclose(fp); return 0; } 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; for_each_lang(scripts_path, 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_path, lang_dir, script_dirent, script_next) { script_root = strdup(script_dirent.d_name); str = (char *)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); } } 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 : ""); } exit(0); } 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_path, 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_path, lang_dir, script_dirent, script_next) { __script_root = strdup(script_dirent.d_name); str = (char *)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 path; } static bool is_top_script(const char *script_path) { return ends_with(script_path, "top") == NULL ? false : true; } static int has_required_arg(char *script_path) { struct script_desc *desc; int n_args = 0; char *p; desc = script_desc__new(NULL); if (read_script_info(desc, script_path)) goto out; if (!desc->args) goto out; for (p = desc->args; *p; p++) if (*p == '<') n_args++; out: script_desc__delete(desc); return n_args; } static const char * const script_usage[] = { "perf script [
]", "perf script [
] record
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