1 #include <linux/hw_breakpoint.h>
6 #include "parse-options.h"
7 #include "parse-events.h"
9 #include "linux/string.h"
14 #include <api/fs/debugfs.h>
15 #include "parse-events-bison.h"
16 #define YY_EXTRA_TYPE int
17 #include "parse-events-flex.h"
19 #include "thread_map.h"
21 #define MAX_NAME_LEN 100
29 extern int parse_events_debug;
31 int parse_events_parse(void *data, void *scanner);
33 static struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
34 [PERF_COUNT_HW_CPU_CYCLES] = {
35 .symbol = "cpu-cycles",
38 [PERF_COUNT_HW_INSTRUCTIONS] = {
39 .symbol = "instructions",
42 [PERF_COUNT_HW_CACHE_REFERENCES] = {
43 .symbol = "cache-references",
46 [PERF_COUNT_HW_CACHE_MISSES] = {
47 .symbol = "cache-misses",
50 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
51 .symbol = "branch-instructions",
54 [PERF_COUNT_HW_BRANCH_MISSES] = {
55 .symbol = "branch-misses",
58 [PERF_COUNT_HW_BUS_CYCLES] = {
59 .symbol = "bus-cycles",
62 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
63 .symbol = "stalled-cycles-frontend",
64 .alias = "idle-cycles-frontend",
66 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
67 .symbol = "stalled-cycles-backend",
68 .alias = "idle-cycles-backend",
70 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
71 .symbol = "ref-cycles",
76 static struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
77 [PERF_COUNT_SW_CPU_CLOCK] = {
78 .symbol = "cpu-clock",
81 [PERF_COUNT_SW_TASK_CLOCK] = {
82 .symbol = "task-clock",
85 [PERF_COUNT_SW_PAGE_FAULTS] = {
86 .symbol = "page-faults",
89 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
90 .symbol = "context-switches",
93 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
94 .symbol = "cpu-migrations",
95 .alias = "migrations",
97 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
98 .symbol = "minor-faults",
101 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
102 .symbol = "major-faults",
105 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
106 .symbol = "alignment-faults",
109 [PERF_COUNT_SW_EMULATION_FAULTS] = {
110 .symbol = "emulation-faults",
113 [PERF_COUNT_SW_DUMMY] = {
119 #define __PERF_EVENT_FIELD(config, name) \
120 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
122 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
123 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
124 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
125 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
127 #define for_each_subsystem(sys_dir, sys_dirent, sys_next) \
128 while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \
129 if (sys_dirent.d_type == DT_DIR && \
130 (strcmp(sys_dirent.d_name, ".")) && \
131 (strcmp(sys_dirent.d_name, "..")))
133 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
135 char evt_path[MAXPATHLEN];
138 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
139 sys_dir->d_name, evt_dir->d_name);
140 fd = open(evt_path, O_RDONLY);
148 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) \
149 while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \
150 if (evt_dirent.d_type == DT_DIR && \
151 (strcmp(evt_dirent.d_name, ".")) && \
152 (strcmp(evt_dirent.d_name, "..")) && \
153 (!tp_event_has_id(&sys_dirent, &evt_dirent)))
155 #define MAX_EVENT_LENGTH 512
158 struct tracepoint_path *tracepoint_id_to_path(u64 config)
160 struct tracepoint_path *path = NULL;
161 DIR *sys_dir, *evt_dir;
162 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
166 char evt_path[MAXPATHLEN];
167 char dir_path[MAXPATHLEN];
169 if (debugfs_valid_mountpoint(tracing_events_path))
172 sys_dir = opendir(tracing_events_path);
176 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
178 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
180 evt_dir = opendir(dir_path);
184 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
186 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
188 fd = open(evt_path, O_RDONLY);
191 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
200 path = zalloc(sizeof(*path));
201 path->system = malloc(MAX_EVENT_LENGTH);
206 path->name = malloc(MAX_EVENT_LENGTH);
208 zfree(&path->system);
212 strncpy(path->system, sys_dirent.d_name,
214 strncpy(path->name, evt_dirent.d_name,
226 struct tracepoint_path *tracepoint_name_to_path(const char *name)
228 struct tracepoint_path *path = zalloc(sizeof(*path));
229 char *str = strchr(name, ':');
231 if (path == NULL || str == NULL) {
236 path->system = strndup(name, str - name);
237 path->name = strdup(str+1);
239 if (path->system == NULL || path->name == NULL) {
240 zfree(&path->system);
249 const char *event_type(int type)
252 case PERF_TYPE_HARDWARE:
255 case PERF_TYPE_SOFTWARE:
258 case PERF_TYPE_TRACEPOINT:
261 case PERF_TYPE_HW_CACHE:
262 return "hardware-cache";
273 static struct perf_evsel *
274 __add_event(struct list_head *list, int *idx,
275 struct perf_event_attr *attr,
276 char *name, struct cpu_map *cpus)
278 struct perf_evsel *evsel;
280 event_attr_init(attr);
282 evsel = perf_evsel__new_idx(attr, (*idx)++);
288 evsel->name = strdup(name);
289 list_add_tail(&evsel->node, list);
293 static int add_event(struct list_head *list, int *idx,
294 struct perf_event_attr *attr, char *name)
296 return __add_event(list, idx, attr, name, NULL) ? 0 : -ENOMEM;
299 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
304 for (i = 0; i < size; i++) {
305 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
306 n = strlen(names[i][j]);
307 if (n > longest && !strncasecmp(str, names[i][j], n))
317 int parse_events_add_cache(struct list_head *list, int *idx,
318 char *type, char *op_result1, char *op_result2)
320 struct perf_event_attr attr;
321 char name[MAX_NAME_LEN];
322 int cache_type = -1, cache_op = -1, cache_result = -1;
323 char *op_result[2] = { op_result1, op_result2 };
327 * No fallback - if we cannot get a clear cache type
330 cache_type = parse_aliases(type, perf_evsel__hw_cache,
331 PERF_COUNT_HW_CACHE_MAX);
332 if (cache_type == -1)
335 n = snprintf(name, MAX_NAME_LEN, "%s", type);
337 for (i = 0; (i < 2) && (op_result[i]); i++) {
338 char *str = op_result[i];
340 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
342 if (cache_op == -1) {
343 cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
344 PERF_COUNT_HW_CACHE_OP_MAX);
346 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
352 if (cache_result == -1) {
353 cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
354 PERF_COUNT_HW_CACHE_RESULT_MAX);
355 if (cache_result >= 0)
361 * Fall back to reads:
364 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
367 * Fall back to accesses:
369 if (cache_result == -1)
370 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
372 memset(&attr, 0, sizeof(attr));
373 attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
374 attr.type = PERF_TYPE_HW_CACHE;
375 return add_event(list, idx, &attr, name);
378 static int add_tracepoint(struct list_head *list, int *idx,
379 char *sys_name, char *evt_name)
381 struct perf_evsel *evsel;
383 evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
387 list_add_tail(&evsel->node, list);
392 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
393 char *sys_name, char *evt_name)
395 char evt_path[MAXPATHLEN];
396 struct dirent *evt_ent;
400 snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
401 evt_dir = opendir(evt_path);
403 perror("Can't open event dir");
407 while (!ret && (evt_ent = readdir(evt_dir))) {
408 if (!strcmp(evt_ent->d_name, ".")
409 || !strcmp(evt_ent->d_name, "..")
410 || !strcmp(evt_ent->d_name, "enable")
411 || !strcmp(evt_ent->d_name, "filter"))
414 if (!strglobmatch(evt_ent->d_name, evt_name))
417 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name);
424 static int add_tracepoint_event(struct list_head *list, int *idx,
425 char *sys_name, char *evt_name)
427 return strpbrk(evt_name, "*?") ?
428 add_tracepoint_multi_event(list, idx, sys_name, evt_name) :
429 add_tracepoint(list, idx, sys_name, evt_name);
432 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
433 char *sys_name, char *evt_name)
435 struct dirent *events_ent;
439 events_dir = opendir(tracing_events_path);
441 perror("Can't open event dir");
445 while (!ret && (events_ent = readdir(events_dir))) {
446 if (!strcmp(events_ent->d_name, ".")
447 || !strcmp(events_ent->d_name, "..")
448 || !strcmp(events_ent->d_name, "enable")
449 || !strcmp(events_ent->d_name, "header_event")
450 || !strcmp(events_ent->d_name, "header_page"))
453 if (!strglobmatch(events_ent->d_name, sys_name))
456 ret = add_tracepoint_event(list, idx, events_ent->d_name,
460 closedir(events_dir);
464 int parse_events_add_tracepoint(struct list_head *list, int *idx,
465 char *sys, char *event)
469 ret = debugfs_valid_mountpoint(tracing_events_path);
473 if (strpbrk(sys, "*?"))
474 return add_tracepoint_multi_sys(list, idx, sys, event);
476 return add_tracepoint_event(list, idx, sys, event);
480 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
484 for (i = 0; i < 3; i++) {
485 if (!type || !type[i])
488 #define CHECK_SET_TYPE(bit) \
490 if (attr->bp_type & bit) \
493 attr->bp_type |= bit; \
498 CHECK_SET_TYPE(HW_BREAKPOINT_R);
501 CHECK_SET_TYPE(HW_BREAKPOINT_W);
504 CHECK_SET_TYPE(HW_BREAKPOINT_X);
511 #undef CHECK_SET_TYPE
513 if (!attr->bp_type) /* Default */
514 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
519 int parse_events_add_breakpoint(struct list_head *list, int *idx,
520 void *ptr, char *type)
522 struct perf_event_attr attr;
524 memset(&attr, 0, sizeof(attr));
525 attr.bp_addr = (unsigned long) ptr;
527 if (parse_breakpoint_type(type, &attr))
531 * We should find a nice way to override the access length
532 * Provide some defaults for now
534 if (attr.bp_type == HW_BREAKPOINT_X)
535 attr.bp_len = sizeof(long);
537 attr.bp_len = HW_BREAKPOINT_LEN_4;
539 attr.type = PERF_TYPE_BREAKPOINT;
540 attr.sample_period = 1;
542 return add_event(list, idx, &attr, NULL);
545 static int config_term(struct perf_event_attr *attr,
546 struct parse_events_term *term)
548 #define CHECK_TYPE_VAL(type) \
550 if (PARSE_EVENTS__TERM_TYPE_ ## type != term->type_val) \
554 switch (term->type_term) {
555 case PARSE_EVENTS__TERM_TYPE_CONFIG:
557 attr->config = term->val.num;
559 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
561 attr->config1 = term->val.num;
563 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
565 attr->config2 = term->val.num;
567 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
569 attr->sample_period = term->val.num;
571 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
573 * TODO uncomment when the field is available
574 * attr->branch_sample_type = term->val.num;
577 case PARSE_EVENTS__TERM_TYPE_NAME:
585 #undef CHECK_TYPE_VAL
588 static int config_attr(struct perf_event_attr *attr,
589 struct list_head *head, int fail)
591 struct parse_events_term *term;
593 list_for_each_entry(term, head, list)
594 if (config_term(attr, term) && fail)
600 int parse_events_add_numeric(struct list_head *list, int *idx,
601 u32 type, u64 config,
602 struct list_head *head_config)
604 struct perf_event_attr attr;
606 memset(&attr, 0, sizeof(attr));
608 attr.config = config;
611 config_attr(&attr, head_config, 1))
614 return add_event(list, idx, &attr, NULL);
617 static int parse_events__is_name_term(struct parse_events_term *term)
619 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
622 static char *pmu_event_name(struct list_head *head_terms)
624 struct parse_events_term *term;
626 list_for_each_entry(term, head_terms, list)
627 if (parse_events__is_name_term(term))
628 return term->val.str;
633 int parse_events_add_pmu(struct list_head *list, int *idx,
634 char *name, struct list_head *head_config)
636 struct perf_event_attr attr;
637 struct perf_pmu_info info;
638 struct perf_pmu *pmu;
639 struct perf_evsel *evsel;
641 pmu = perf_pmu__find(name);
645 if (pmu->default_config) {
646 memcpy(&attr, pmu->default_config,
647 sizeof(struct perf_event_attr));
649 memset(&attr, 0, sizeof(attr));
653 attr.type = pmu->type;
654 evsel = __add_event(list, idx, &attr, NULL, pmu->cpus);
655 return evsel ? 0 : -ENOMEM;
658 if (perf_pmu__check_alias(pmu, head_config, &info))
662 * Configure hardcoded terms first, no need to check
663 * return value when called with fail == 0 ;)
665 config_attr(&attr, head_config, 0);
667 if (perf_pmu__config(pmu, &attr, head_config))
670 evsel = __add_event(list, idx, &attr, pmu_event_name(head_config),
673 evsel->unit = info.unit;
674 evsel->scale = info.scale;
677 return evsel ? 0 : -ENOMEM;
680 int parse_events__modifier_group(struct list_head *list,
683 return parse_events__modifier_event(list, event_mod, true);
686 void parse_events__set_leader(char *name, struct list_head *list)
688 struct perf_evsel *leader;
690 __perf_evlist__set_leader(list);
691 leader = list_entry(list->next, struct perf_evsel, node);
692 leader->group_name = name ? strdup(name) : NULL;
695 /* list_event is assumed to point to malloc'ed memory */
696 void parse_events_update_lists(struct list_head *list_event,
697 struct list_head *list_all)
700 * Called for single event definition. Update the
701 * 'all event' list, and reinit the 'single event'
702 * list, for next event definition.
704 list_splice_tail(list_event, list_all);
708 struct event_modifier {
720 static int get_event_modifier(struct event_modifier *mod, char *str,
721 struct perf_evsel *evsel)
723 int eu = evsel ? evsel->attr.exclude_user : 0;
724 int ek = evsel ? evsel->attr.exclude_kernel : 0;
725 int eh = evsel ? evsel->attr.exclude_hv : 0;
726 int eH = evsel ? evsel->attr.exclude_host : 0;
727 int eG = evsel ? evsel->attr.exclude_guest : 0;
728 int precise = evsel ? evsel->attr.precise_ip : 0;
730 int pinned = evsel ? evsel->attr.pinned : 0;
732 int exclude = eu | ek | eh;
733 int exclude_GH = evsel ? evsel->exclude_GH : 0;
735 memset(mod, 0, sizeof(*mod));
740 exclude = eu = ek = eh = 1;
742 } else if (*str == 'k') {
744 exclude = eu = ek = eh = 1;
746 } else if (*str == 'h') {
748 exclude = eu = ek = eh = 1;
750 } else if (*str == 'G') {
752 exclude_GH = eG = eH = 1;
754 } else if (*str == 'H') {
756 exclude_GH = eG = eH = 1;
758 } else if (*str == 'p') {
760 /* use of precise requires exclude_guest */
763 } else if (*str == 'S') {
765 } else if (*str == 'D') {
776 * 0 - SAMPLE_IP can have arbitrary skid
777 * 1 - SAMPLE_IP must have constant skid
778 * 2 - SAMPLE_IP requested to have 0 skid
779 * 3 - SAMPLE_IP must have 0 skid
781 * See also PERF_RECORD_MISC_EXACT_IP
791 mod->precise = precise;
792 mod->exclude_GH = exclude_GH;
793 mod->sample_read = sample_read;
794 mod->pinned = pinned;
800 * Basic modifier sanity check to validate it contains only one
801 * instance of any modifier (apart from 'p') present.
803 static int check_modifier(char *str)
807 /* The sizeof includes 0 byte as well. */
808 if (strlen(str) > (sizeof("ukhGHpppSD") - 1))
812 if (*p != 'p' && strchr(p + 1, *p))
820 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
822 struct perf_evsel *evsel;
823 struct event_modifier mod;
828 if (check_modifier(str))
831 if (!add && get_event_modifier(&mod, str, NULL))
834 __evlist__for_each(list, evsel) {
835 if (add && get_event_modifier(&mod, str, evsel))
838 evsel->attr.exclude_user = mod.eu;
839 evsel->attr.exclude_kernel = mod.ek;
840 evsel->attr.exclude_hv = mod.eh;
841 evsel->attr.precise_ip = mod.precise;
842 evsel->attr.exclude_host = mod.eH;
843 evsel->attr.exclude_guest = mod.eG;
844 evsel->exclude_GH = mod.exclude_GH;
845 evsel->sample_read = mod.sample_read;
847 if (perf_evsel__is_group_leader(evsel))
848 evsel->attr.pinned = mod.pinned;
854 int parse_events_name(struct list_head *list, char *name)
856 struct perf_evsel *evsel;
858 __evlist__for_each(list, evsel) {
860 evsel->name = strdup(name);
866 static int parse_events__scanner(const char *str, void *data, int start_token);
868 static int parse_events_fixup(int ret, const char *str, void *data,
871 char *o = strdup(str);
879 while ((p = strsep(&t, ",")) != NULL) {
881 str_append(&s, &len, ",");
882 str_append(&s, &len, "cpu/");
883 str_append(&s, &len, p);
884 str_append(&s, &len, "/");
889 return parse_events__scanner(s, data, start_token);
892 static int parse_events__scanner(const char *str, void *data, int start_token)
894 YY_BUFFER_STATE buffer;
898 ret = parse_events_lex_init_extra(start_token, &scanner);
902 buffer = parse_events__scan_string(str, scanner);
905 parse_events_debug = 1;
907 ret = parse_events_parse(data, scanner);
909 parse_events__flush_buffer(buffer, scanner);
910 parse_events__delete_buffer(buffer, scanner);
911 parse_events_lex_destroy(scanner);
912 if (ret && !strchr(str, '/'))
913 ret = parse_events_fixup(ret, str, data, start_token);
918 * parse event config string, return a list of event terms.
920 int parse_events_terms(struct list_head *terms, const char *str)
922 struct parse_events_terms data = {
927 ret = parse_events__scanner(str, &data, PE_START_TERMS);
929 list_splice(data.terms, terms);
935 parse_events__free_terms(data.terms);
939 int parse_events(struct perf_evlist *evlist, const char *str)
941 struct parse_events_evlist data = {
942 .list = LIST_HEAD_INIT(data.list),
943 .idx = evlist->nr_entries,
947 ret = parse_events__scanner(str, &data, PE_START_EVENTS);
949 int entries = data.idx - evlist->nr_entries;
950 perf_evlist__splice_list_tail(evlist, &data.list, entries);
951 evlist->nr_groups += data.nr_groups;
956 * There are 2 users - builtin-record and builtin-test objects.
957 * Both call perf_evlist__delete in case of error, so we dont
963 int parse_events_option(const struct option *opt, const char *str,
964 int unset __maybe_unused)
966 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
967 int ret = parse_events(evlist, str);
970 fprintf(stderr, "invalid or unsupported event: '%s'\n", str);
971 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
976 int parse_filter(const struct option *opt, const char *str,
977 int unset __maybe_unused)
979 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
980 struct perf_evsel *last = NULL;
982 if (evlist->nr_entries > 0)
983 last = perf_evlist__last(evlist);
985 if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
987 "--filter option should follow a -e tracepoint option\n");
991 last->filter = strdup(str);
992 if (last->filter == NULL) {
993 fprintf(stderr, "not enough memory to hold filter string\n");
1000 static const char * const event_type_descriptors[] = {
1004 "Hardware cache event",
1005 "Raw hardware event descriptor",
1006 "Hardware breakpoint",
1010 * Print the events from <debugfs_mount_point>/tracing/events
1013 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1016 DIR *sys_dir, *evt_dir;
1017 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1018 char evt_path[MAXPATHLEN];
1019 char dir_path[MAXPATHLEN];
1020 char sbuf[STRERR_BUFSIZE];
1022 if (debugfs_valid_mountpoint(tracing_events_path)) {
1023 printf(" [ Tracepoints not available: %s ]\n",
1024 strerror_r(errno, sbuf, sizeof(sbuf)));
1028 sys_dir = opendir(tracing_events_path);
1032 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1033 if (subsys_glob != NULL &&
1034 !strglobmatch(sys_dirent.d_name, subsys_glob))
1037 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1039 evt_dir = opendir(dir_path);
1043 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1044 if (event_glob != NULL &&
1045 !strglobmatch(evt_dirent.d_name, event_glob))
1049 printf("%s:%s ", sys_dirent.d_name, evt_dirent.d_name);
1053 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1054 sys_dirent.d_name, evt_dirent.d_name);
1055 printf(" %-50s [%s]\n", evt_path,
1056 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1064 * Check whether event is in <debugfs_mount_point>/tracing/events
1067 int is_valid_tracepoint(const char *event_string)
1069 DIR *sys_dir, *evt_dir;
1070 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1071 char evt_path[MAXPATHLEN];
1072 char dir_path[MAXPATHLEN];
1074 if (debugfs_valid_mountpoint(tracing_events_path))
1077 sys_dir = opendir(tracing_events_path);
1081 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1083 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1085 evt_dir = opendir(dir_path);
1089 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1090 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1091 sys_dirent.d_name, evt_dirent.d_name);
1092 if (!strcmp(evt_path, event_string)) {
1104 static bool is_event_supported(u8 type, unsigned config)
1108 struct perf_evsel *evsel;
1109 struct perf_event_attr attr = {
1115 struct thread_map map;
1122 evsel = perf_evsel__new(&attr);
1124 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1125 ret = open_return >= 0;
1127 if (open_return == -EACCES) {
1129 * This happens if the paranoid value
1130 * /proc/sys/kernel/perf_event_paranoid is set to 2
1131 * Re-run with exclude_kernel set; we don't do that
1132 * by default as some ARM machines do not support it.
1135 evsel->attr.exclude_kernel = 1;
1136 ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1138 perf_evsel__delete(evsel);
1144 static void __print_events_type(u8 type, struct event_symbol *syms,
1150 for (i = 0; i < max ; i++, syms++) {
1151 if (!is_event_supported(type, i))
1154 if (strlen(syms->alias))
1155 snprintf(name, sizeof(name), "%s OR %s",
1156 syms->symbol, syms->alias);
1158 snprintf(name, sizeof(name), "%s", syms->symbol);
1160 printf(" %-50s [%s]\n", name, event_type_descriptors[type]);
1164 void print_events_type(u8 type)
1166 if (type == PERF_TYPE_SOFTWARE)
1167 __print_events_type(type, event_symbols_sw, PERF_COUNT_SW_MAX);
1169 __print_events_type(type, event_symbols_hw, PERF_COUNT_HW_MAX);
1172 int print_hwcache_events(const char *event_glob, bool name_only)
1174 unsigned int type, op, i, printed = 0;
1177 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1178 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1179 /* skip invalid cache type */
1180 if (!perf_evsel__is_cache_op_valid(type, op))
1183 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1184 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1185 name, sizeof(name));
1186 if (event_glob != NULL && !strglobmatch(name, event_glob))
1189 if (!is_event_supported(PERF_TYPE_HW_CACHE,
1190 type | (op << 8) | (i << 16)))
1194 printf("%s ", name);
1196 printf(" %-50s [%s]\n", name,
1197 event_type_descriptors[PERF_TYPE_HW_CACHE]);
1208 static void print_symbol_events(const char *event_glob, unsigned type,
1209 struct event_symbol *syms, unsigned max,
1212 unsigned i, printed = 0;
1213 char name[MAX_NAME_LEN];
1215 for (i = 0; i < max; i++, syms++) {
1217 if (event_glob != NULL &&
1218 !(strglobmatch(syms->symbol, event_glob) ||
1219 (syms->alias && strglobmatch(syms->alias, event_glob))))
1222 if (!is_event_supported(type, i))
1226 printf("%s ", syms->symbol);
1230 if (strlen(syms->alias))
1231 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1233 strncpy(name, syms->symbol, MAX_NAME_LEN);
1235 printf(" %-50s [%s]\n", name, event_type_descriptors[type]);
1245 * Print the help text for the event symbols:
1247 void print_events(const char *event_glob, bool name_only)
1251 printf("List of pre-defined events (to be used in -e):\n");
1254 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1255 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1257 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1258 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1260 print_hwcache_events(event_glob, name_only);
1262 print_pmu_events(event_glob, name_only);
1264 if (event_glob != NULL)
1268 printf(" %-50s [%s]\n",
1270 event_type_descriptors[PERF_TYPE_RAW]);
1271 printf(" %-50s [%s]\n",
1272 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1273 event_type_descriptors[PERF_TYPE_RAW]);
1274 printf(" (see 'man perf-list' on how to encode it)\n");
1277 printf(" %-50s [%s]\n",
1278 "mem:<addr>[:access]",
1279 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1283 print_tracepoint_events(NULL, NULL, name_only);
1286 int parse_events__is_hardcoded_term(struct parse_events_term *term)
1288 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1291 static int new_term(struct parse_events_term **_term, int type_val,
1292 int type_term, char *config,
1295 struct parse_events_term *term;
1297 term = zalloc(sizeof(*term));
1301 INIT_LIST_HEAD(&term->list);
1302 term->type_val = type_val;
1303 term->type_term = type_term;
1304 term->config = config;
1307 case PARSE_EVENTS__TERM_TYPE_NUM:
1308 term->val.num = num;
1310 case PARSE_EVENTS__TERM_TYPE_STR:
1311 term->val.str = str;
1322 int parse_events_term__num(struct parse_events_term **term,
1323 int type_term, char *config, u64 num)
1325 return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
1329 int parse_events_term__str(struct parse_events_term **term,
1330 int type_term, char *config, char *str)
1332 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
1336 int parse_events_term__sym_hw(struct parse_events_term **term,
1337 char *config, unsigned idx)
1339 struct event_symbol *sym;
1341 BUG_ON(idx >= PERF_COUNT_HW_MAX);
1342 sym = &event_symbols_hw[idx];
1345 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1346 PARSE_EVENTS__TERM_TYPE_USER, config,
1347 (char *) sym->symbol, 0);
1349 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
1350 PARSE_EVENTS__TERM_TYPE_USER,
1351 (char *) "event", (char *) sym->symbol, 0);
1354 int parse_events_term__clone(struct parse_events_term **new,
1355 struct parse_events_term *term)
1357 return new_term(new, term->type_val, term->type_term, term->config,
1358 term->val.str, term->val.num);
1361 void parse_events__free_terms(struct list_head *terms)
1363 struct parse_events_term *term, *h;
1365 list_for_each_entry_safe(term, h, terms, list)