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Merge remote-tracking branch 'asoc/fix/rt5645' into asoc-linus
[deliverable/linux.git] / tools / perf / util / parse-events.c
1 #include <linux/hw_breakpoint.h>
2 #include <linux/err.h>
3 #include "util.h"
4 #include "../perf.h"
5 #include "evlist.h"
6 #include "evsel.h"
7 #include <subcmd/parse-options.h>
8 #include "parse-events.h"
9 #include <subcmd/exec-cmd.h>
10 #include "string.h"
11 #include "symbol.h"
12 #include "cache.h"
13 #include "header.h"
14 #include "bpf-loader.h"
15 #include "debug.h"
16 #include <api/fs/tracing_path.h>
17 #include "parse-events-bison.h"
18 #define YY_EXTRA_TYPE int
19 #include "parse-events-flex.h"
20 #include "pmu.h"
21 #include "thread_map.h"
22 #include "cpumap.h"
23 #include "asm/bug.h"
24
25 #define MAX_NAME_LEN 100
26
27 #ifdef PARSER_DEBUG
28 extern int parse_events_debug;
29 #endif
30 int parse_events_parse(void *data, void *scanner);
31 static int get_config_terms(struct list_head *head_config,
32 struct list_head *head_terms __maybe_unused);
33
34 static struct perf_pmu_event_symbol *perf_pmu_events_list;
35 /*
36 * The variable indicates the number of supported pmu event symbols.
37 * 0 means not initialized and ready to init
38 * -1 means failed to init, don't try anymore
39 * >0 is the number of supported pmu event symbols
40 */
41 static int perf_pmu_events_list_num;
42
43 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
44 [PERF_COUNT_HW_CPU_CYCLES] = {
45 .symbol = "cpu-cycles",
46 .alias = "cycles",
47 },
48 [PERF_COUNT_HW_INSTRUCTIONS] = {
49 .symbol = "instructions",
50 .alias = "",
51 },
52 [PERF_COUNT_HW_CACHE_REFERENCES] = {
53 .symbol = "cache-references",
54 .alias = "",
55 },
56 [PERF_COUNT_HW_CACHE_MISSES] = {
57 .symbol = "cache-misses",
58 .alias = "",
59 },
60 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
61 .symbol = "branch-instructions",
62 .alias = "branches",
63 },
64 [PERF_COUNT_HW_BRANCH_MISSES] = {
65 .symbol = "branch-misses",
66 .alias = "",
67 },
68 [PERF_COUNT_HW_BUS_CYCLES] = {
69 .symbol = "bus-cycles",
70 .alias = "",
71 },
72 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
73 .symbol = "stalled-cycles-frontend",
74 .alias = "idle-cycles-frontend",
75 },
76 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
77 .symbol = "stalled-cycles-backend",
78 .alias = "idle-cycles-backend",
79 },
80 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
81 .symbol = "ref-cycles",
82 .alias = "",
83 },
84 };
85
86 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
87 [PERF_COUNT_SW_CPU_CLOCK] = {
88 .symbol = "cpu-clock",
89 .alias = "",
90 },
91 [PERF_COUNT_SW_TASK_CLOCK] = {
92 .symbol = "task-clock",
93 .alias = "",
94 },
95 [PERF_COUNT_SW_PAGE_FAULTS] = {
96 .symbol = "page-faults",
97 .alias = "faults",
98 },
99 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
100 .symbol = "context-switches",
101 .alias = "cs",
102 },
103 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
104 .symbol = "cpu-migrations",
105 .alias = "migrations",
106 },
107 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
108 .symbol = "minor-faults",
109 .alias = "",
110 },
111 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
112 .symbol = "major-faults",
113 .alias = "",
114 },
115 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
116 .symbol = "alignment-faults",
117 .alias = "",
118 },
119 [PERF_COUNT_SW_EMULATION_FAULTS] = {
120 .symbol = "emulation-faults",
121 .alias = "",
122 },
123 [PERF_COUNT_SW_DUMMY] = {
124 .symbol = "dummy",
125 .alias = "",
126 },
127 [PERF_COUNT_SW_BPF_OUTPUT] = {
128 .symbol = "bpf-output",
129 .alias = "",
130 },
131 };
132
133 #define __PERF_EVENT_FIELD(config, name) \
134 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
135
136 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
137 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
138 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
139 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
140
141 #define for_each_subsystem(sys_dir, sys_dirent, sys_next) \
142 while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \
143 if (sys_dirent.d_type == DT_DIR && \
144 (strcmp(sys_dirent.d_name, ".")) && \
145 (strcmp(sys_dirent.d_name, "..")))
146
147 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
148 {
149 char evt_path[MAXPATHLEN];
150 int fd;
151
152 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
153 sys_dir->d_name, evt_dir->d_name);
154 fd = open(evt_path, O_RDONLY);
155 if (fd < 0)
156 return -EINVAL;
157 close(fd);
158
159 return 0;
160 }
161
162 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) \
163 while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \
164 if (evt_dirent.d_type == DT_DIR && \
165 (strcmp(evt_dirent.d_name, ".")) && \
166 (strcmp(evt_dirent.d_name, "..")) && \
167 (!tp_event_has_id(&sys_dirent, &evt_dirent)))
168
169 #define MAX_EVENT_LENGTH 512
170
171
172 struct tracepoint_path *tracepoint_id_to_path(u64 config)
173 {
174 struct tracepoint_path *path = NULL;
175 DIR *sys_dir, *evt_dir;
176 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
177 char id_buf[24];
178 int fd;
179 u64 id;
180 char evt_path[MAXPATHLEN];
181 char dir_path[MAXPATHLEN];
182
183 sys_dir = opendir(tracing_events_path);
184 if (!sys_dir)
185 return NULL;
186
187 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
188
189 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
190 sys_dirent.d_name);
191 evt_dir = opendir(dir_path);
192 if (!evt_dir)
193 continue;
194
195 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
196
197 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
198 evt_dirent.d_name);
199 fd = open(evt_path, O_RDONLY);
200 if (fd < 0)
201 continue;
202 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
203 close(fd);
204 continue;
205 }
206 close(fd);
207 id = atoll(id_buf);
208 if (id == config) {
209 closedir(evt_dir);
210 closedir(sys_dir);
211 path = zalloc(sizeof(*path));
212 path->system = malloc(MAX_EVENT_LENGTH);
213 if (!path->system) {
214 free(path);
215 return NULL;
216 }
217 path->name = malloc(MAX_EVENT_LENGTH);
218 if (!path->name) {
219 zfree(&path->system);
220 free(path);
221 return NULL;
222 }
223 strncpy(path->system, sys_dirent.d_name,
224 MAX_EVENT_LENGTH);
225 strncpy(path->name, evt_dirent.d_name,
226 MAX_EVENT_LENGTH);
227 return path;
228 }
229 }
230 closedir(evt_dir);
231 }
232
233 closedir(sys_dir);
234 return NULL;
235 }
236
237 struct tracepoint_path *tracepoint_name_to_path(const char *name)
238 {
239 struct tracepoint_path *path = zalloc(sizeof(*path));
240 char *str = strchr(name, ':');
241
242 if (path == NULL || str == NULL) {
243 free(path);
244 return NULL;
245 }
246
247 path->system = strndup(name, str - name);
248 path->name = strdup(str+1);
249
250 if (path->system == NULL || path->name == NULL) {
251 zfree(&path->system);
252 zfree(&path->name);
253 free(path);
254 path = NULL;
255 }
256
257 return path;
258 }
259
260 const char *event_type(int type)
261 {
262 switch (type) {
263 case PERF_TYPE_HARDWARE:
264 return "hardware";
265
266 case PERF_TYPE_SOFTWARE:
267 return "software";
268
269 case PERF_TYPE_TRACEPOINT:
270 return "tracepoint";
271
272 case PERF_TYPE_HW_CACHE:
273 return "hardware-cache";
274
275 default:
276 break;
277 }
278
279 return "unknown";
280 }
281
282
283
284 static struct perf_evsel *
285 __add_event(struct list_head *list, int *idx,
286 struct perf_event_attr *attr,
287 char *name, struct cpu_map *cpus,
288 struct list_head *config_terms)
289 {
290 struct perf_evsel *evsel;
291
292 event_attr_init(attr);
293
294 evsel = perf_evsel__new_idx(attr, (*idx)++);
295 if (!evsel)
296 return NULL;
297
298 evsel->cpus = cpu_map__get(cpus);
299 evsel->own_cpus = cpu_map__get(cpus);
300
301 if (name)
302 evsel->name = strdup(name);
303
304 if (config_terms)
305 list_splice(config_terms, &evsel->config_terms);
306
307 list_add_tail(&evsel->node, list);
308 return evsel;
309 }
310
311 static int add_event(struct list_head *list, int *idx,
312 struct perf_event_attr *attr, char *name,
313 struct list_head *config_terms)
314 {
315 return __add_event(list, idx, attr, name, NULL, config_terms) ? 0 : -ENOMEM;
316 }
317
318 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
319 {
320 int i, j;
321 int n, longest = -1;
322
323 for (i = 0; i < size; i++) {
324 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
325 n = strlen(names[i][j]);
326 if (n > longest && !strncasecmp(str, names[i][j], n))
327 longest = n;
328 }
329 if (longest > 0)
330 return i;
331 }
332
333 return -1;
334 }
335
336 int parse_events_add_cache(struct list_head *list, int *idx,
337 char *type, char *op_result1, char *op_result2)
338 {
339 struct perf_event_attr attr;
340 char name[MAX_NAME_LEN];
341 int cache_type = -1, cache_op = -1, cache_result = -1;
342 char *op_result[2] = { op_result1, op_result2 };
343 int i, n;
344
345 /*
346 * No fallback - if we cannot get a clear cache type
347 * then bail out:
348 */
349 cache_type = parse_aliases(type, perf_evsel__hw_cache,
350 PERF_COUNT_HW_CACHE_MAX);
351 if (cache_type == -1)
352 return -EINVAL;
353
354 n = snprintf(name, MAX_NAME_LEN, "%s", type);
355
356 for (i = 0; (i < 2) && (op_result[i]); i++) {
357 char *str = op_result[i];
358
359 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
360
361 if (cache_op == -1) {
362 cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
363 PERF_COUNT_HW_CACHE_OP_MAX);
364 if (cache_op >= 0) {
365 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
366 return -EINVAL;
367 continue;
368 }
369 }
370
371 if (cache_result == -1) {
372 cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
373 PERF_COUNT_HW_CACHE_RESULT_MAX);
374 if (cache_result >= 0)
375 continue;
376 }
377 }
378
379 /*
380 * Fall back to reads:
381 */
382 if (cache_op == -1)
383 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
384
385 /*
386 * Fall back to accesses:
387 */
388 if (cache_result == -1)
389 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
390
391 memset(&attr, 0, sizeof(attr));
392 attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
393 attr.type = PERF_TYPE_HW_CACHE;
394 return add_event(list, idx, &attr, name, NULL);
395 }
396
397 static void tracepoint_error(struct parse_events_error *e, int err,
398 char *sys, char *name)
399 {
400 char help[BUFSIZ];
401
402 /*
403 * We get error directly from syscall errno ( > 0),
404 * or from encoded pointer's error ( < 0).
405 */
406 err = abs(err);
407
408 switch (err) {
409 case EACCES:
410 e->str = strdup("can't access trace events");
411 break;
412 case ENOENT:
413 e->str = strdup("unknown tracepoint");
414 break;
415 default:
416 e->str = strdup("failed to add tracepoint");
417 break;
418 }
419
420 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
421 e->help = strdup(help);
422 }
423
424 static int add_tracepoint(struct list_head *list, int *idx,
425 char *sys_name, char *evt_name,
426 struct parse_events_error *err,
427 struct list_head *head_config)
428 {
429 struct perf_evsel *evsel;
430
431 evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
432 if (IS_ERR(evsel)) {
433 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
434 return PTR_ERR(evsel);
435 }
436
437 if (head_config) {
438 LIST_HEAD(config_terms);
439
440 if (get_config_terms(head_config, &config_terms))
441 return -ENOMEM;
442 list_splice(&config_terms, &evsel->config_terms);
443 }
444
445 list_add_tail(&evsel->node, list);
446 return 0;
447 }
448
449 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
450 char *sys_name, char *evt_name,
451 struct parse_events_error *err,
452 struct list_head *head_config)
453 {
454 char evt_path[MAXPATHLEN];
455 struct dirent *evt_ent;
456 DIR *evt_dir;
457 int ret = 0, found = 0;
458
459 snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
460 evt_dir = opendir(evt_path);
461 if (!evt_dir) {
462 tracepoint_error(err, errno, sys_name, evt_name);
463 return -1;
464 }
465
466 while (!ret && (evt_ent = readdir(evt_dir))) {
467 if (!strcmp(evt_ent->d_name, ".")
468 || !strcmp(evt_ent->d_name, "..")
469 || !strcmp(evt_ent->d_name, "enable")
470 || !strcmp(evt_ent->d_name, "filter"))
471 continue;
472
473 if (!strglobmatch(evt_ent->d_name, evt_name))
474 continue;
475
476 found++;
477
478 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
479 err, head_config);
480 }
481
482 if (!found) {
483 tracepoint_error(err, ENOENT, sys_name, evt_name);
484 ret = -1;
485 }
486
487 closedir(evt_dir);
488 return ret;
489 }
490
491 static int add_tracepoint_event(struct list_head *list, int *idx,
492 char *sys_name, char *evt_name,
493 struct parse_events_error *err,
494 struct list_head *head_config)
495 {
496 return strpbrk(evt_name, "*?") ?
497 add_tracepoint_multi_event(list, idx, sys_name, evt_name,
498 err, head_config) :
499 add_tracepoint(list, idx, sys_name, evt_name,
500 err, head_config);
501 }
502
503 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
504 char *sys_name, char *evt_name,
505 struct parse_events_error *err,
506 struct list_head *head_config)
507 {
508 struct dirent *events_ent;
509 DIR *events_dir;
510 int ret = 0;
511
512 events_dir = opendir(tracing_events_path);
513 if (!events_dir) {
514 tracepoint_error(err, errno, sys_name, evt_name);
515 return -1;
516 }
517
518 while (!ret && (events_ent = readdir(events_dir))) {
519 if (!strcmp(events_ent->d_name, ".")
520 || !strcmp(events_ent->d_name, "..")
521 || !strcmp(events_ent->d_name, "enable")
522 || !strcmp(events_ent->d_name, "header_event")
523 || !strcmp(events_ent->d_name, "header_page"))
524 continue;
525
526 if (!strglobmatch(events_ent->d_name, sys_name))
527 continue;
528
529 ret = add_tracepoint_event(list, idx, events_ent->d_name,
530 evt_name, err, head_config);
531 }
532
533 closedir(events_dir);
534 return ret;
535 }
536
537 struct __add_bpf_event_param {
538 struct parse_events_evlist *data;
539 struct list_head *list;
540 };
541
542 static int add_bpf_event(struct probe_trace_event *tev, int fd,
543 void *_param)
544 {
545 LIST_HEAD(new_evsels);
546 struct __add_bpf_event_param *param = _param;
547 struct parse_events_evlist *evlist = param->data;
548 struct list_head *list = param->list;
549 struct perf_evsel *pos;
550 int err;
551
552 pr_debug("add bpf event %s:%s and attach bpf program %d\n",
553 tev->group, tev->event, fd);
554
555 err = parse_events_add_tracepoint(&new_evsels, &evlist->idx, tev->group,
556 tev->event, evlist->error, NULL);
557 if (err) {
558 struct perf_evsel *evsel, *tmp;
559
560 pr_debug("Failed to add BPF event %s:%s\n",
561 tev->group, tev->event);
562 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
563 list_del(&evsel->node);
564 perf_evsel__delete(evsel);
565 }
566 return err;
567 }
568 pr_debug("adding %s:%s\n", tev->group, tev->event);
569
570 list_for_each_entry(pos, &new_evsels, node) {
571 pr_debug("adding %s:%s to %p\n",
572 tev->group, tev->event, pos);
573 pos->bpf_fd = fd;
574 }
575 list_splice(&new_evsels, list);
576 return 0;
577 }
578
579 int parse_events_load_bpf_obj(struct parse_events_evlist *data,
580 struct list_head *list,
581 struct bpf_object *obj)
582 {
583 int err;
584 char errbuf[BUFSIZ];
585 struct __add_bpf_event_param param = {data, list};
586 static bool registered_unprobe_atexit = false;
587
588 if (IS_ERR(obj) || !obj) {
589 snprintf(errbuf, sizeof(errbuf),
590 "Internal error: load bpf obj with NULL");
591 err = -EINVAL;
592 goto errout;
593 }
594
595 /*
596 * Register atexit handler before calling bpf__probe() so
597 * bpf__probe() don't need to unprobe probe points its already
598 * created when failure.
599 */
600 if (!registered_unprobe_atexit) {
601 atexit(bpf__clear);
602 registered_unprobe_atexit = true;
603 }
604
605 err = bpf__probe(obj);
606 if (err) {
607 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
608 goto errout;
609 }
610
611 err = bpf__load(obj);
612 if (err) {
613 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
614 goto errout;
615 }
616
617 err = bpf__foreach_tev(obj, add_bpf_event, &param);
618 if (err) {
619 snprintf(errbuf, sizeof(errbuf),
620 "Attach events in BPF object failed");
621 goto errout;
622 }
623
624 return 0;
625 errout:
626 data->error->help = strdup("(add -v to see detail)");
627 data->error->str = strdup(errbuf);
628 return err;
629 }
630
631 int parse_events_load_bpf(struct parse_events_evlist *data,
632 struct list_head *list,
633 char *bpf_file_name,
634 bool source)
635 {
636 struct bpf_object *obj;
637
638 obj = bpf__prepare_load(bpf_file_name, source);
639 if (IS_ERR(obj)) {
640 char errbuf[BUFSIZ];
641 int err;
642
643 err = PTR_ERR(obj);
644
645 if (err == -ENOTSUP)
646 snprintf(errbuf, sizeof(errbuf),
647 "BPF support is not compiled");
648 else
649 bpf__strerror_prepare_load(bpf_file_name,
650 source,
651 -err, errbuf,
652 sizeof(errbuf));
653
654 data->error->help = strdup("(add -v to see detail)");
655 data->error->str = strdup(errbuf);
656 return err;
657 }
658
659 return parse_events_load_bpf_obj(data, list, obj);
660 }
661
662 static int
663 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
664 {
665 int i;
666
667 for (i = 0; i < 3; i++) {
668 if (!type || !type[i])
669 break;
670
671 #define CHECK_SET_TYPE(bit) \
672 do { \
673 if (attr->bp_type & bit) \
674 return -EINVAL; \
675 else \
676 attr->bp_type |= bit; \
677 } while (0)
678
679 switch (type[i]) {
680 case 'r':
681 CHECK_SET_TYPE(HW_BREAKPOINT_R);
682 break;
683 case 'w':
684 CHECK_SET_TYPE(HW_BREAKPOINT_W);
685 break;
686 case 'x':
687 CHECK_SET_TYPE(HW_BREAKPOINT_X);
688 break;
689 default:
690 return -EINVAL;
691 }
692 }
693
694 #undef CHECK_SET_TYPE
695
696 if (!attr->bp_type) /* Default */
697 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
698
699 return 0;
700 }
701
702 int parse_events_add_breakpoint(struct list_head *list, int *idx,
703 void *ptr, char *type, u64 len)
704 {
705 struct perf_event_attr attr;
706
707 memset(&attr, 0, sizeof(attr));
708 attr.bp_addr = (unsigned long) ptr;
709
710 if (parse_breakpoint_type(type, &attr))
711 return -EINVAL;
712
713 /* Provide some defaults if len is not specified */
714 if (!len) {
715 if (attr.bp_type == HW_BREAKPOINT_X)
716 len = sizeof(long);
717 else
718 len = HW_BREAKPOINT_LEN_4;
719 }
720
721 attr.bp_len = len;
722
723 attr.type = PERF_TYPE_BREAKPOINT;
724 attr.sample_period = 1;
725
726 return add_event(list, idx, &attr, NULL, NULL);
727 }
728
729 static int check_type_val(struct parse_events_term *term,
730 struct parse_events_error *err,
731 int type)
732 {
733 if (type == term->type_val)
734 return 0;
735
736 if (err) {
737 err->idx = term->err_val;
738 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
739 err->str = strdup("expected numeric value");
740 else
741 err->str = strdup("expected string value");
742 }
743 return -EINVAL;
744 }
745
746 typedef int config_term_func_t(struct perf_event_attr *attr,
747 struct parse_events_term *term,
748 struct parse_events_error *err);
749
750 static int config_term_common(struct perf_event_attr *attr,
751 struct parse_events_term *term,
752 struct parse_events_error *err)
753 {
754 #define CHECK_TYPE_VAL(type) \
755 do { \
756 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
757 return -EINVAL; \
758 } while (0)
759
760 switch (term->type_term) {
761 case PARSE_EVENTS__TERM_TYPE_CONFIG:
762 CHECK_TYPE_VAL(NUM);
763 attr->config = term->val.num;
764 break;
765 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
766 CHECK_TYPE_VAL(NUM);
767 attr->config1 = term->val.num;
768 break;
769 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
770 CHECK_TYPE_VAL(NUM);
771 attr->config2 = term->val.num;
772 break;
773 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
774 CHECK_TYPE_VAL(NUM);
775 break;
776 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
777 CHECK_TYPE_VAL(NUM);
778 break;
779 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
780 /*
781 * TODO uncomment when the field is available
782 * attr->branch_sample_type = term->val.num;
783 */
784 break;
785 case PARSE_EVENTS__TERM_TYPE_TIME:
786 CHECK_TYPE_VAL(NUM);
787 if (term->val.num > 1) {
788 err->str = strdup("expected 0 or 1");
789 err->idx = term->err_val;
790 return -EINVAL;
791 }
792 break;
793 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
794 CHECK_TYPE_VAL(STR);
795 break;
796 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
797 CHECK_TYPE_VAL(NUM);
798 break;
799 case PARSE_EVENTS__TERM_TYPE_INHERIT:
800 CHECK_TYPE_VAL(NUM);
801 break;
802 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
803 CHECK_TYPE_VAL(NUM);
804 break;
805 case PARSE_EVENTS__TERM_TYPE_NAME:
806 CHECK_TYPE_VAL(STR);
807 break;
808 default:
809 err->str = strdup("unknown term");
810 err->idx = term->err_term;
811 err->help = parse_events_formats_error_string(NULL);
812 return -EINVAL;
813 }
814
815 return 0;
816 #undef CHECK_TYPE_VAL
817 }
818
819 static int config_term_pmu(struct perf_event_attr *attr,
820 struct parse_events_term *term,
821 struct parse_events_error *err)
822 {
823 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER)
824 /*
825 * Always succeed for sysfs terms, as we dont know
826 * at this point what type they need to have.
827 */
828 return 0;
829 else
830 return config_term_common(attr, term, err);
831 }
832
833 static int config_term_tracepoint(struct perf_event_attr *attr,
834 struct parse_events_term *term,
835 struct parse_events_error *err)
836 {
837 switch (term->type_term) {
838 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
839 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
840 case PARSE_EVENTS__TERM_TYPE_INHERIT:
841 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
842 return config_term_common(attr, term, err);
843 default:
844 if (err) {
845 err->idx = term->err_term;
846 err->str = strdup("unknown term");
847 err->help = strdup("valid terms: call-graph,stack-size\n");
848 }
849 return -EINVAL;
850 }
851
852 return 0;
853 }
854
855 static int config_attr(struct perf_event_attr *attr,
856 struct list_head *head,
857 struct parse_events_error *err,
858 config_term_func_t config_term)
859 {
860 struct parse_events_term *term;
861
862 list_for_each_entry(term, head, list)
863 if (config_term(attr, term, err))
864 return -EINVAL;
865
866 return 0;
867 }
868
869 static int get_config_terms(struct list_head *head_config,
870 struct list_head *head_terms __maybe_unused)
871 {
872 #define ADD_CONFIG_TERM(__type, __name, __val) \
873 do { \
874 struct perf_evsel_config_term *__t; \
875 \
876 __t = zalloc(sizeof(*__t)); \
877 if (!__t) \
878 return -ENOMEM; \
879 \
880 INIT_LIST_HEAD(&__t->list); \
881 __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
882 __t->val.__name = __val; \
883 list_add_tail(&__t->list, head_terms); \
884 } while (0)
885
886 struct parse_events_term *term;
887
888 list_for_each_entry(term, head_config, list) {
889 switch (term->type_term) {
890 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
891 ADD_CONFIG_TERM(PERIOD, period, term->val.num);
892 break;
893 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
894 ADD_CONFIG_TERM(FREQ, freq, term->val.num);
895 break;
896 case PARSE_EVENTS__TERM_TYPE_TIME:
897 ADD_CONFIG_TERM(TIME, time, term->val.num);
898 break;
899 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
900 ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
901 break;
902 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
903 ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
904 break;
905 case PARSE_EVENTS__TERM_TYPE_INHERIT:
906 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
907 break;
908 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
909 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
910 break;
911 default:
912 break;
913 }
914 }
915 #undef ADD_EVSEL_CONFIG
916 return 0;
917 }
918
919 int parse_events_add_tracepoint(struct list_head *list, int *idx,
920 char *sys, char *event,
921 struct parse_events_error *err,
922 struct list_head *head_config)
923 {
924 if (head_config) {
925 struct perf_event_attr attr;
926
927 if (config_attr(&attr, head_config, err,
928 config_term_tracepoint))
929 return -EINVAL;
930 }
931
932 if (strpbrk(sys, "*?"))
933 return add_tracepoint_multi_sys(list, idx, sys, event,
934 err, head_config);
935 else
936 return add_tracepoint_event(list, idx, sys, event,
937 err, head_config);
938 }
939
940 int parse_events_add_numeric(struct parse_events_evlist *data,
941 struct list_head *list,
942 u32 type, u64 config,
943 struct list_head *head_config)
944 {
945 struct perf_event_attr attr;
946 LIST_HEAD(config_terms);
947
948 memset(&attr, 0, sizeof(attr));
949 attr.type = type;
950 attr.config = config;
951
952 if (head_config) {
953 if (config_attr(&attr, head_config, data->error,
954 config_term_common))
955 return -EINVAL;
956
957 if (get_config_terms(head_config, &config_terms))
958 return -ENOMEM;
959 }
960
961 return add_event(list, &data->idx, &attr, NULL, &config_terms);
962 }
963
964 static int parse_events__is_name_term(struct parse_events_term *term)
965 {
966 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
967 }
968
969 static char *pmu_event_name(struct list_head *head_terms)
970 {
971 struct parse_events_term *term;
972
973 list_for_each_entry(term, head_terms, list)
974 if (parse_events__is_name_term(term))
975 return term->val.str;
976
977 return NULL;
978 }
979
980 int parse_events_add_pmu(struct parse_events_evlist *data,
981 struct list_head *list, char *name,
982 struct list_head *head_config)
983 {
984 struct perf_event_attr attr;
985 struct perf_pmu_info info;
986 struct perf_pmu *pmu;
987 struct perf_evsel *evsel;
988 LIST_HEAD(config_terms);
989
990 pmu = perf_pmu__find(name);
991 if (!pmu)
992 return -EINVAL;
993
994 if (pmu->default_config) {
995 memcpy(&attr, pmu->default_config,
996 sizeof(struct perf_event_attr));
997 } else {
998 memset(&attr, 0, sizeof(attr));
999 }
1000
1001 if (!head_config) {
1002 attr.type = pmu->type;
1003 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
1004 return evsel ? 0 : -ENOMEM;
1005 }
1006
1007 if (perf_pmu__check_alias(pmu, head_config, &info))
1008 return -EINVAL;
1009
1010 /*
1011 * Configure hardcoded terms first, no need to check
1012 * return value when called with fail == 0 ;)
1013 */
1014 if (config_attr(&attr, head_config, data->error, config_term_pmu))
1015 return -EINVAL;
1016
1017 if (get_config_terms(head_config, &config_terms))
1018 return -ENOMEM;
1019
1020 if (perf_pmu__config(pmu, &attr, head_config, data->error))
1021 return -EINVAL;
1022
1023 evsel = __add_event(list, &data->idx, &attr,
1024 pmu_event_name(head_config), pmu->cpus,
1025 &config_terms);
1026 if (evsel) {
1027 evsel->unit = info.unit;
1028 evsel->scale = info.scale;
1029 evsel->per_pkg = info.per_pkg;
1030 evsel->snapshot = info.snapshot;
1031 }
1032
1033 return evsel ? 0 : -ENOMEM;
1034 }
1035
1036 int parse_events__modifier_group(struct list_head *list,
1037 char *event_mod)
1038 {
1039 return parse_events__modifier_event(list, event_mod, true);
1040 }
1041
1042 void parse_events__set_leader(char *name, struct list_head *list)
1043 {
1044 struct perf_evsel *leader;
1045
1046 if (list_empty(list)) {
1047 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1048 return;
1049 }
1050
1051 __perf_evlist__set_leader(list);
1052 leader = list_entry(list->next, struct perf_evsel, node);
1053 leader->group_name = name ? strdup(name) : NULL;
1054 }
1055
1056 /* list_event is assumed to point to malloc'ed memory */
1057 void parse_events_update_lists(struct list_head *list_event,
1058 struct list_head *list_all)
1059 {
1060 /*
1061 * Called for single event definition. Update the
1062 * 'all event' list, and reinit the 'single event'
1063 * list, for next event definition.
1064 */
1065 list_splice_tail(list_event, list_all);
1066 free(list_event);
1067 }
1068
1069 struct event_modifier {
1070 int eu;
1071 int ek;
1072 int eh;
1073 int eH;
1074 int eG;
1075 int eI;
1076 int precise;
1077 int precise_max;
1078 int exclude_GH;
1079 int sample_read;
1080 int pinned;
1081 };
1082
1083 static int get_event_modifier(struct event_modifier *mod, char *str,
1084 struct perf_evsel *evsel)
1085 {
1086 int eu = evsel ? evsel->attr.exclude_user : 0;
1087 int ek = evsel ? evsel->attr.exclude_kernel : 0;
1088 int eh = evsel ? evsel->attr.exclude_hv : 0;
1089 int eH = evsel ? evsel->attr.exclude_host : 0;
1090 int eG = evsel ? evsel->attr.exclude_guest : 0;
1091 int eI = evsel ? evsel->attr.exclude_idle : 0;
1092 int precise = evsel ? evsel->attr.precise_ip : 0;
1093 int precise_max = 0;
1094 int sample_read = 0;
1095 int pinned = evsel ? evsel->attr.pinned : 0;
1096
1097 int exclude = eu | ek | eh;
1098 int exclude_GH = evsel ? evsel->exclude_GH : 0;
1099
1100 memset(mod, 0, sizeof(*mod));
1101
1102 while (*str) {
1103 if (*str == 'u') {
1104 if (!exclude)
1105 exclude = eu = ek = eh = 1;
1106 eu = 0;
1107 } else if (*str == 'k') {
1108 if (!exclude)
1109 exclude = eu = ek = eh = 1;
1110 ek = 0;
1111 } else if (*str == 'h') {
1112 if (!exclude)
1113 exclude = eu = ek = eh = 1;
1114 eh = 0;
1115 } else if (*str == 'G') {
1116 if (!exclude_GH)
1117 exclude_GH = eG = eH = 1;
1118 eG = 0;
1119 } else if (*str == 'H') {
1120 if (!exclude_GH)
1121 exclude_GH = eG = eH = 1;
1122 eH = 0;
1123 } else if (*str == 'I') {
1124 eI = 1;
1125 } else if (*str == 'p') {
1126 precise++;
1127 /* use of precise requires exclude_guest */
1128 if (!exclude_GH)
1129 eG = 1;
1130 } else if (*str == 'P') {
1131 precise_max = 1;
1132 } else if (*str == 'S') {
1133 sample_read = 1;
1134 } else if (*str == 'D') {
1135 pinned = 1;
1136 } else
1137 break;
1138
1139 ++str;
1140 }
1141
1142 /*
1143 * precise ip:
1144 *
1145 * 0 - SAMPLE_IP can have arbitrary skid
1146 * 1 - SAMPLE_IP must have constant skid
1147 * 2 - SAMPLE_IP requested to have 0 skid
1148 * 3 - SAMPLE_IP must have 0 skid
1149 *
1150 * See also PERF_RECORD_MISC_EXACT_IP
1151 */
1152 if (precise > 3)
1153 return -EINVAL;
1154
1155 mod->eu = eu;
1156 mod->ek = ek;
1157 mod->eh = eh;
1158 mod->eH = eH;
1159 mod->eG = eG;
1160 mod->eI = eI;
1161 mod->precise = precise;
1162 mod->precise_max = precise_max;
1163 mod->exclude_GH = exclude_GH;
1164 mod->sample_read = sample_read;
1165 mod->pinned = pinned;
1166
1167 return 0;
1168 }
1169
1170 /*
1171 * Basic modifier sanity check to validate it contains only one
1172 * instance of any modifier (apart from 'p') present.
1173 */
1174 static int check_modifier(char *str)
1175 {
1176 char *p = str;
1177
1178 /* The sizeof includes 0 byte as well. */
1179 if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1180 return -1;
1181
1182 while (*p) {
1183 if (*p != 'p' && strchr(p + 1, *p))
1184 return -1;
1185 p++;
1186 }
1187
1188 return 0;
1189 }
1190
1191 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1192 {
1193 struct perf_evsel *evsel;
1194 struct event_modifier mod;
1195
1196 if (str == NULL)
1197 return 0;
1198
1199 if (check_modifier(str))
1200 return -EINVAL;
1201
1202 if (!add && get_event_modifier(&mod, str, NULL))
1203 return -EINVAL;
1204
1205 __evlist__for_each(list, evsel) {
1206 if (add && get_event_modifier(&mod, str, evsel))
1207 return -EINVAL;
1208
1209 evsel->attr.exclude_user = mod.eu;
1210 evsel->attr.exclude_kernel = mod.ek;
1211 evsel->attr.exclude_hv = mod.eh;
1212 evsel->attr.precise_ip = mod.precise;
1213 evsel->attr.exclude_host = mod.eH;
1214 evsel->attr.exclude_guest = mod.eG;
1215 evsel->attr.exclude_idle = mod.eI;
1216 evsel->exclude_GH = mod.exclude_GH;
1217 evsel->sample_read = mod.sample_read;
1218 evsel->precise_max = mod.precise_max;
1219
1220 if (perf_evsel__is_group_leader(evsel))
1221 evsel->attr.pinned = mod.pinned;
1222 }
1223
1224 return 0;
1225 }
1226
1227 int parse_events_name(struct list_head *list, char *name)
1228 {
1229 struct perf_evsel *evsel;
1230
1231 __evlist__for_each(list, evsel) {
1232 if (!evsel->name)
1233 evsel->name = strdup(name);
1234 }
1235
1236 return 0;
1237 }
1238
1239 static int
1240 comp_pmu(const void *p1, const void *p2)
1241 {
1242 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1243 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1244
1245 return strcmp(pmu1->symbol, pmu2->symbol);
1246 }
1247
1248 static void perf_pmu__parse_cleanup(void)
1249 {
1250 if (perf_pmu_events_list_num > 0) {
1251 struct perf_pmu_event_symbol *p;
1252 int i;
1253
1254 for (i = 0; i < perf_pmu_events_list_num; i++) {
1255 p = perf_pmu_events_list + i;
1256 free(p->symbol);
1257 }
1258 free(perf_pmu_events_list);
1259 perf_pmu_events_list = NULL;
1260 perf_pmu_events_list_num = 0;
1261 }
1262 }
1263
1264 #define SET_SYMBOL(str, stype) \
1265 do { \
1266 p->symbol = str; \
1267 if (!p->symbol) \
1268 goto err; \
1269 p->type = stype; \
1270 } while (0)
1271
1272 /*
1273 * Read the pmu events list from sysfs
1274 * Save it into perf_pmu_events_list
1275 */
1276 static void perf_pmu__parse_init(void)
1277 {
1278
1279 struct perf_pmu *pmu = NULL;
1280 struct perf_pmu_alias *alias;
1281 int len = 0;
1282
1283 pmu = perf_pmu__find("cpu");
1284 if ((pmu == NULL) || list_empty(&pmu->aliases)) {
1285 perf_pmu_events_list_num = -1;
1286 return;
1287 }
1288 list_for_each_entry(alias, &pmu->aliases, list) {
1289 if (strchr(alias->name, '-'))
1290 len++;
1291 len++;
1292 }
1293 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1294 if (!perf_pmu_events_list)
1295 return;
1296 perf_pmu_events_list_num = len;
1297
1298 len = 0;
1299 list_for_each_entry(alias, &pmu->aliases, list) {
1300 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1301 char *tmp = strchr(alias->name, '-');
1302
1303 if (tmp != NULL) {
1304 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1305 PMU_EVENT_SYMBOL_PREFIX);
1306 p++;
1307 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1308 len += 2;
1309 } else {
1310 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1311 len++;
1312 }
1313 }
1314 qsort(perf_pmu_events_list, len,
1315 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1316
1317 return;
1318 err:
1319 perf_pmu__parse_cleanup();
1320 }
1321
1322 enum perf_pmu_event_symbol_type
1323 perf_pmu__parse_check(const char *name)
1324 {
1325 struct perf_pmu_event_symbol p, *r;
1326
1327 /* scan kernel pmu events from sysfs if needed */
1328 if (perf_pmu_events_list_num == 0)
1329 perf_pmu__parse_init();
1330 /*
1331 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1332 * cpu-cycles has been handled by hardcode.
1333 * So it must be cpu// events, not kernel pmu event.
1334 */
1335 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1336 return PMU_EVENT_SYMBOL_ERR;
1337
1338 p.symbol = strdup(name);
1339 r = bsearch(&p, perf_pmu_events_list,
1340 (size_t) perf_pmu_events_list_num,
1341 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1342 free(p.symbol);
1343 return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1344 }
1345
1346 static int parse_events__scanner(const char *str, void *data, int start_token)
1347 {
1348 YY_BUFFER_STATE buffer;
1349 void *scanner;
1350 int ret;
1351
1352 ret = parse_events_lex_init_extra(start_token, &scanner);
1353 if (ret)
1354 return ret;
1355
1356 buffer = parse_events__scan_string(str, scanner);
1357
1358 #ifdef PARSER_DEBUG
1359 parse_events_debug = 1;
1360 #endif
1361 ret = parse_events_parse(data, scanner);
1362
1363 parse_events__flush_buffer(buffer, scanner);
1364 parse_events__delete_buffer(buffer, scanner);
1365 parse_events_lex_destroy(scanner);
1366 return ret;
1367 }
1368
1369 /*
1370 * parse event config string, return a list of event terms.
1371 */
1372 int parse_events_terms(struct list_head *terms, const char *str)
1373 {
1374 struct parse_events_terms data = {
1375 .terms = NULL,
1376 };
1377 int ret;
1378
1379 ret = parse_events__scanner(str, &data, PE_START_TERMS);
1380 if (!ret) {
1381 list_splice(data.terms, terms);
1382 zfree(&data.terms);
1383 return 0;
1384 }
1385
1386 if (data.terms)
1387 parse_events__free_terms(data.terms);
1388 return ret;
1389 }
1390
1391 int parse_events(struct perf_evlist *evlist, const char *str,
1392 struct parse_events_error *err)
1393 {
1394 struct parse_events_evlist data = {
1395 .list = LIST_HEAD_INIT(data.list),
1396 .idx = evlist->nr_entries,
1397 .error = err,
1398 };
1399 int ret;
1400
1401 ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1402 perf_pmu__parse_cleanup();
1403 if (!ret) {
1404 struct perf_evsel *last;
1405
1406 if (list_empty(&data.list)) {
1407 WARN_ONCE(true, "WARNING: event parser found nothing");
1408 return -1;
1409 }
1410
1411 perf_evlist__splice_list_tail(evlist, &data.list);
1412 evlist->nr_groups += data.nr_groups;
1413 last = perf_evlist__last(evlist);
1414 last->cmdline_group_boundary = true;
1415
1416 return 0;
1417 }
1418
1419 /*
1420 * There are 2 users - builtin-record and builtin-test objects.
1421 * Both call perf_evlist__delete in case of error, so we dont
1422 * need to bother.
1423 */
1424 return ret;
1425 }
1426
1427 #define MAX_WIDTH 1000
1428 static int get_term_width(void)
1429 {
1430 struct winsize ws;
1431
1432 get_term_dimensions(&ws);
1433 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1434 }
1435
1436 static void parse_events_print_error(struct parse_events_error *err,
1437 const char *event)
1438 {
1439 const char *str = "invalid or unsupported event: ";
1440 char _buf[MAX_WIDTH];
1441 char *buf = (char *) event;
1442 int idx = 0;
1443
1444 if (err->str) {
1445 /* -2 for extra '' in the final fprintf */
1446 int width = get_term_width() - 2;
1447 int len_event = strlen(event);
1448 int len_str, max_len, cut = 0;
1449
1450 /*
1451 * Maximum error index indent, we will cut
1452 * the event string if it's bigger.
1453 */
1454 int max_err_idx = 13;
1455
1456 /*
1457 * Let's be specific with the message when
1458 * we have the precise error.
1459 */
1460 str = "event syntax error: ";
1461 len_str = strlen(str);
1462 max_len = width - len_str;
1463
1464 buf = _buf;
1465
1466 /* We're cutting from the beggining. */
1467 if (err->idx > max_err_idx)
1468 cut = err->idx - max_err_idx;
1469
1470 strncpy(buf, event + cut, max_len);
1471
1472 /* Mark cut parts with '..' on both sides. */
1473 if (cut)
1474 buf[0] = buf[1] = '.';
1475
1476 if ((len_event - cut) > max_len) {
1477 buf[max_len - 1] = buf[max_len - 2] = '.';
1478 buf[max_len] = 0;
1479 }
1480
1481 idx = len_str + err->idx - cut;
1482 }
1483
1484 fprintf(stderr, "%s'%s'\n", str, buf);
1485 if (idx) {
1486 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1487 if (err->help)
1488 fprintf(stderr, "\n%s\n", err->help);
1489 free(err->str);
1490 free(err->help);
1491 }
1492
1493 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1494 }
1495
1496 #undef MAX_WIDTH
1497
1498 int parse_events_option(const struct option *opt, const char *str,
1499 int unset __maybe_unused)
1500 {
1501 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1502 struct parse_events_error err = { .idx = 0, };
1503 int ret = parse_events(evlist, str, &err);
1504
1505 if (ret)
1506 parse_events_print_error(&err, str);
1507
1508 return ret;
1509 }
1510
1511 static int
1512 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1513 int (*func)(struct perf_evsel *evsel,
1514 const void *arg),
1515 const void *arg)
1516 {
1517 struct perf_evsel *last = NULL;
1518 int err;
1519
1520 /*
1521 * Don't return when list_empty, give func a chance to report
1522 * error when it found last == NULL.
1523 *
1524 * So no need to WARN here, let *func do this.
1525 */
1526 if (evlist->nr_entries > 0)
1527 last = perf_evlist__last(evlist);
1528
1529 do {
1530 err = (*func)(last, arg);
1531 if (err)
1532 return -1;
1533 if (!last)
1534 return 0;
1535
1536 if (last->node.prev == &evlist->entries)
1537 return 0;
1538 last = list_entry(last->node.prev, struct perf_evsel, node);
1539 } while (!last->cmdline_group_boundary);
1540
1541 return 0;
1542 }
1543
1544 static int set_filter(struct perf_evsel *evsel, const void *arg)
1545 {
1546 const char *str = arg;
1547
1548 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1549 fprintf(stderr,
1550 "--filter option should follow a -e tracepoint option\n");
1551 return -1;
1552 }
1553
1554 if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
1555 fprintf(stderr,
1556 "not enough memory to hold filter string\n");
1557 return -1;
1558 }
1559
1560 return 0;
1561 }
1562
1563 int parse_filter(const struct option *opt, const char *str,
1564 int unset __maybe_unused)
1565 {
1566 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1567
1568 return foreach_evsel_in_last_glob(evlist, set_filter,
1569 (const void *)str);
1570 }
1571
1572 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1573 const void *arg __maybe_unused)
1574 {
1575 char new_filter[64];
1576
1577 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1578 fprintf(stderr,
1579 "--exclude-perf option should follow a -e tracepoint option\n");
1580 return -1;
1581 }
1582
1583 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1584
1585 if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
1586 fprintf(stderr,
1587 "not enough memory to hold filter string\n");
1588 return -1;
1589 }
1590
1591 return 0;
1592 }
1593
1594 int exclude_perf(const struct option *opt,
1595 const char *arg __maybe_unused,
1596 int unset __maybe_unused)
1597 {
1598 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1599
1600 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1601 NULL);
1602 }
1603
1604 static const char * const event_type_descriptors[] = {
1605 "Hardware event",
1606 "Software event",
1607 "Tracepoint event",
1608 "Hardware cache event",
1609 "Raw hardware event descriptor",
1610 "Hardware breakpoint",
1611 };
1612
1613 static int cmp_string(const void *a, const void *b)
1614 {
1615 const char * const *as = a;
1616 const char * const *bs = b;
1617
1618 return strcmp(*as, *bs);
1619 }
1620
1621 /*
1622 * Print the events from <debugfs_mount_point>/tracing/events
1623 */
1624
1625 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1626 bool name_only)
1627 {
1628 DIR *sys_dir, *evt_dir;
1629 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1630 char evt_path[MAXPATHLEN];
1631 char dir_path[MAXPATHLEN];
1632 char **evt_list = NULL;
1633 unsigned int evt_i = 0, evt_num = 0;
1634 bool evt_num_known = false;
1635
1636 restart:
1637 sys_dir = opendir(tracing_events_path);
1638 if (!sys_dir)
1639 return;
1640
1641 if (evt_num_known) {
1642 evt_list = zalloc(sizeof(char *) * evt_num);
1643 if (!evt_list)
1644 goto out_close_sys_dir;
1645 }
1646
1647 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1648 if (subsys_glob != NULL &&
1649 !strglobmatch(sys_dirent.d_name, subsys_glob))
1650 continue;
1651
1652 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1653 sys_dirent.d_name);
1654 evt_dir = opendir(dir_path);
1655 if (!evt_dir)
1656 continue;
1657
1658 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1659 if (event_glob != NULL &&
1660 !strglobmatch(evt_dirent.d_name, event_glob))
1661 continue;
1662
1663 if (!evt_num_known) {
1664 evt_num++;
1665 continue;
1666 }
1667
1668 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1669 sys_dirent.d_name, evt_dirent.d_name);
1670
1671 evt_list[evt_i] = strdup(evt_path);
1672 if (evt_list[evt_i] == NULL)
1673 goto out_close_evt_dir;
1674 evt_i++;
1675 }
1676 closedir(evt_dir);
1677 }
1678 closedir(sys_dir);
1679
1680 if (!evt_num_known) {
1681 evt_num_known = true;
1682 goto restart;
1683 }
1684 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1685 evt_i = 0;
1686 while (evt_i < evt_num) {
1687 if (name_only) {
1688 printf("%s ", evt_list[evt_i++]);
1689 continue;
1690 }
1691 printf(" %-50s [%s]\n", evt_list[evt_i++],
1692 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1693 }
1694 if (evt_num && pager_in_use())
1695 printf("\n");
1696
1697 out_free:
1698 evt_num = evt_i;
1699 for (evt_i = 0; evt_i < evt_num; evt_i++)
1700 zfree(&evt_list[evt_i]);
1701 zfree(&evt_list);
1702 return;
1703
1704 out_close_evt_dir:
1705 closedir(evt_dir);
1706 out_close_sys_dir:
1707 closedir(sys_dir);
1708
1709 printf("FATAL: not enough memory to print %s\n",
1710 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1711 if (evt_list)
1712 goto out_free;
1713 }
1714
1715 /*
1716 * Check whether event is in <debugfs_mount_point>/tracing/events
1717 */
1718
1719 int is_valid_tracepoint(const char *event_string)
1720 {
1721 DIR *sys_dir, *evt_dir;
1722 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1723 char evt_path[MAXPATHLEN];
1724 char dir_path[MAXPATHLEN];
1725
1726 sys_dir = opendir(tracing_events_path);
1727 if (!sys_dir)
1728 return 0;
1729
1730 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1731
1732 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1733 sys_dirent.d_name);
1734 evt_dir = opendir(dir_path);
1735 if (!evt_dir)
1736 continue;
1737
1738 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1739 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1740 sys_dirent.d_name, evt_dirent.d_name);
1741 if (!strcmp(evt_path, event_string)) {
1742 closedir(evt_dir);
1743 closedir(sys_dir);
1744 return 1;
1745 }
1746 }
1747 closedir(evt_dir);
1748 }
1749 closedir(sys_dir);
1750 return 0;
1751 }
1752
1753 static bool is_event_supported(u8 type, unsigned config)
1754 {
1755 bool ret = true;
1756 int open_return;
1757 struct perf_evsel *evsel;
1758 struct perf_event_attr attr = {
1759 .type = type,
1760 .config = config,
1761 .disabled = 1,
1762 };
1763 struct {
1764 struct thread_map map;
1765 int threads[1];
1766 } tmap = {
1767 .map.nr = 1,
1768 .threads = { 0 },
1769 };
1770
1771 evsel = perf_evsel__new(&attr);
1772 if (evsel) {
1773 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1774 ret = open_return >= 0;
1775
1776 if (open_return == -EACCES) {
1777 /*
1778 * This happens if the paranoid value
1779 * /proc/sys/kernel/perf_event_paranoid is set to 2
1780 * Re-run with exclude_kernel set; we don't do that
1781 * by default as some ARM machines do not support it.
1782 *
1783 */
1784 evsel->attr.exclude_kernel = 1;
1785 ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1786 }
1787 perf_evsel__delete(evsel);
1788 }
1789
1790 return ret;
1791 }
1792
1793 int print_hwcache_events(const char *event_glob, bool name_only)
1794 {
1795 unsigned int type, op, i, evt_i = 0, evt_num = 0;
1796 char name[64];
1797 char **evt_list = NULL;
1798 bool evt_num_known = false;
1799
1800 restart:
1801 if (evt_num_known) {
1802 evt_list = zalloc(sizeof(char *) * evt_num);
1803 if (!evt_list)
1804 goto out_enomem;
1805 }
1806
1807 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1808 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1809 /* skip invalid cache type */
1810 if (!perf_evsel__is_cache_op_valid(type, op))
1811 continue;
1812
1813 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1814 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1815 name, sizeof(name));
1816 if (event_glob != NULL && !strglobmatch(name, event_glob))
1817 continue;
1818
1819 if (!is_event_supported(PERF_TYPE_HW_CACHE,
1820 type | (op << 8) | (i << 16)))
1821 continue;
1822
1823 if (!evt_num_known) {
1824 evt_num++;
1825 continue;
1826 }
1827
1828 evt_list[evt_i] = strdup(name);
1829 if (evt_list[evt_i] == NULL)
1830 goto out_enomem;
1831 evt_i++;
1832 }
1833 }
1834 }
1835
1836 if (!evt_num_known) {
1837 evt_num_known = true;
1838 goto restart;
1839 }
1840 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1841 evt_i = 0;
1842 while (evt_i < evt_num) {
1843 if (name_only) {
1844 printf("%s ", evt_list[evt_i++]);
1845 continue;
1846 }
1847 printf(" %-50s [%s]\n", evt_list[evt_i++],
1848 event_type_descriptors[PERF_TYPE_HW_CACHE]);
1849 }
1850 if (evt_num && pager_in_use())
1851 printf("\n");
1852
1853 out_free:
1854 evt_num = evt_i;
1855 for (evt_i = 0; evt_i < evt_num; evt_i++)
1856 zfree(&evt_list[evt_i]);
1857 zfree(&evt_list);
1858 return evt_num;
1859
1860 out_enomem:
1861 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
1862 if (evt_list)
1863 goto out_free;
1864 return evt_num;
1865 }
1866
1867 void print_symbol_events(const char *event_glob, unsigned type,
1868 struct event_symbol *syms, unsigned max,
1869 bool name_only)
1870 {
1871 unsigned int i, evt_i = 0, evt_num = 0;
1872 char name[MAX_NAME_LEN];
1873 char **evt_list = NULL;
1874 bool evt_num_known = false;
1875
1876 restart:
1877 if (evt_num_known) {
1878 evt_list = zalloc(sizeof(char *) * evt_num);
1879 if (!evt_list)
1880 goto out_enomem;
1881 syms -= max;
1882 }
1883
1884 for (i = 0; i < max; i++, syms++) {
1885
1886 if (event_glob != NULL && syms->symbol != NULL &&
1887 !(strglobmatch(syms->symbol, event_glob) ||
1888 (syms->alias && strglobmatch(syms->alias, event_glob))))
1889 continue;
1890
1891 if (!is_event_supported(type, i))
1892 continue;
1893
1894 if (!evt_num_known) {
1895 evt_num++;
1896 continue;
1897 }
1898
1899 if (!name_only && strlen(syms->alias))
1900 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1901 else
1902 strncpy(name, syms->symbol, MAX_NAME_LEN);
1903
1904 evt_list[evt_i] = strdup(name);
1905 if (evt_list[evt_i] == NULL)
1906 goto out_enomem;
1907 evt_i++;
1908 }
1909
1910 if (!evt_num_known) {
1911 evt_num_known = true;
1912 goto restart;
1913 }
1914 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1915 evt_i = 0;
1916 while (evt_i < evt_num) {
1917 if (name_only) {
1918 printf("%s ", evt_list[evt_i++]);
1919 continue;
1920 }
1921 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
1922 }
1923 if (evt_num && pager_in_use())
1924 printf("\n");
1925
1926 out_free:
1927 evt_num = evt_i;
1928 for (evt_i = 0; evt_i < evt_num; evt_i++)
1929 zfree(&evt_list[evt_i]);
1930 zfree(&evt_list);
1931 return;
1932
1933 out_enomem:
1934 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
1935 if (evt_list)
1936 goto out_free;
1937 }
1938
1939 /*
1940 * Print the help text for the event symbols:
1941 */
1942 void print_events(const char *event_glob, bool name_only)
1943 {
1944 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1945 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1946
1947 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1948 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1949
1950 print_hwcache_events(event_glob, name_only);
1951
1952 print_pmu_events(event_glob, name_only);
1953
1954 if (event_glob != NULL)
1955 return;
1956
1957 if (!name_only) {
1958 printf(" %-50s [%s]\n",
1959 "rNNN",
1960 event_type_descriptors[PERF_TYPE_RAW]);
1961 printf(" %-50s [%s]\n",
1962 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1963 event_type_descriptors[PERF_TYPE_RAW]);
1964 if (pager_in_use())
1965 printf(" (see 'man perf-list' on how to encode it)\n\n");
1966
1967 printf(" %-50s [%s]\n",
1968 "mem:<addr>[/len][:access]",
1969 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1970 if (pager_in_use())
1971 printf("\n");
1972 }
1973
1974 print_tracepoint_events(NULL, NULL, name_only);
1975 }
1976
1977 int parse_events__is_hardcoded_term(struct parse_events_term *term)
1978 {
1979 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1980 }
1981
1982 static int new_term(struct parse_events_term **_term, int type_val,
1983 int type_term, char *config,
1984 char *str, u64 num, int err_term, int err_val)
1985 {
1986 struct parse_events_term *term;
1987
1988 term = zalloc(sizeof(*term));
1989 if (!term)
1990 return -ENOMEM;
1991
1992 INIT_LIST_HEAD(&term->list);
1993 term->type_val = type_val;
1994 term->type_term = type_term;
1995 term->config = config;
1996 term->err_term = err_term;
1997 term->err_val = err_val;
1998
1999 switch (type_val) {
2000 case PARSE_EVENTS__TERM_TYPE_NUM:
2001 term->val.num = num;
2002 break;
2003 case PARSE_EVENTS__TERM_TYPE_STR:
2004 term->val.str = str;
2005 break;
2006 default:
2007 free(term);
2008 return -EINVAL;
2009 }
2010
2011 *_term = term;
2012 return 0;
2013 }
2014
2015 int parse_events_term__num(struct parse_events_term **term,
2016 int type_term, char *config, u64 num,
2017 void *loc_term_, void *loc_val_)
2018 {
2019 YYLTYPE *loc_term = loc_term_;
2020 YYLTYPE *loc_val = loc_val_;
2021
2022 return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
2023 config, NULL, num,
2024 loc_term ? loc_term->first_column : 0,
2025 loc_val ? loc_val->first_column : 0);
2026 }
2027
2028 int parse_events_term__str(struct parse_events_term **term,
2029 int type_term, char *config, char *str,
2030 void *loc_term_, void *loc_val_)
2031 {
2032 YYLTYPE *loc_term = loc_term_;
2033 YYLTYPE *loc_val = loc_val_;
2034
2035 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
2036 config, str, 0,
2037 loc_term ? loc_term->first_column : 0,
2038 loc_val ? loc_val->first_column : 0);
2039 }
2040
2041 int parse_events_term__sym_hw(struct parse_events_term **term,
2042 char *config, unsigned idx)
2043 {
2044 struct event_symbol *sym;
2045
2046 BUG_ON(idx >= PERF_COUNT_HW_MAX);
2047 sym = &event_symbols_hw[idx];
2048
2049 if (config)
2050 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2051 PARSE_EVENTS__TERM_TYPE_USER, config,
2052 (char *) sym->symbol, 0, 0, 0);
2053 else
2054 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2055 PARSE_EVENTS__TERM_TYPE_USER,
2056 (char *) "event", (char *) sym->symbol,
2057 0, 0, 0);
2058 }
2059
2060 int parse_events_term__clone(struct parse_events_term **new,
2061 struct parse_events_term *term)
2062 {
2063 return new_term(new, term->type_val, term->type_term, term->config,
2064 term->val.str, term->val.num,
2065 term->err_term, term->err_val);
2066 }
2067
2068 void parse_events__free_terms(struct list_head *terms)
2069 {
2070 struct parse_events_term *term, *h;
2071
2072 list_for_each_entry_safe(term, h, terms, list)
2073 free(term);
2074 }
2075
2076 void parse_events_evlist_error(struct parse_events_evlist *data,
2077 int idx, const char *str)
2078 {
2079 struct parse_events_error *err = data->error;
2080
2081 if (!err)
2082 return;
2083 err->idx = idx;
2084 err->str = strdup(str);
2085 WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2086 }
2087
2088 /*
2089 * Return string contains valid config terms of an event.
2090 * @additional_terms: For terms such as PMU sysfs terms.
2091 */
2092 char *parse_events_formats_error_string(char *additional_terms)
2093 {
2094 char *str;
2095 static const char *static_terms = "config,config1,config2,name,"
2096 "period,freq,branch_type,time,"
2097 "call-graph,stack-size\n";
2098
2099 /* valid terms */
2100 if (additional_terms) {
2101 if (!asprintf(&str, "valid terms: %s,%s",
2102 additional_terms, static_terms))
2103 goto fail;
2104 } else {
2105 if (!asprintf(&str, "valid terms: %s", static_terms))
2106 goto fail;
2107 }
2108 return str;
2109
2110 fail:
2111 return NULL;
2112 }
Linux kernel - Deliverables
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