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1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/hw_breakpoint.h>
3 #include <linux/err.h>
4 #include <dirent.h>
5 #include <errno.h>
6 #include <sys/ioctl.h>
7 #include <sys/param.h>
8 #include "term.h"
9 #include "../perf.h"
10 #include "evlist.h"
11 #include "evsel.h"
12 #include <subcmd/parse-options.h>
13 #include "parse-events.h"
14 #include <subcmd/exec-cmd.h>
15 #include "string2.h"
16 #include "strlist.h"
17 #include "symbol.h"
18 #include "cache.h"
19 #include "header.h"
20 #include "bpf-loader.h"
21 #include "debug.h"
22 #include <api/fs/tracing_path.h>
23 #include "parse-events-bison.h"
24 #define YY_EXTRA_TYPE int
25 #include "parse-events-flex.h"
26 #include "pmu.h"
27 #include "thread_map.h"
28 #include "cpumap.h"
29 #include "probe-file.h"
30 #include "asm/bug.h"
31 #include "util/parse-branch-options.h"
32 #include "metricgroup.h"
33
34 #define MAX_NAME_LEN 100
35
36 #ifdef PARSER_DEBUG
37 extern int parse_events_debug;
38 #endif
39 int parse_events_parse(void *parse_state, void *scanner);
40 static int get_config_terms(struct list_head *head_config,
41 struct list_head *head_terms __maybe_unused);
42
43 static struct perf_pmu_event_symbol *perf_pmu_events_list;
44 /*
45 * The variable indicates the number of supported pmu event symbols.
46 * 0 means not initialized and ready to init
47 * -1 means failed to init, don't try anymore
48 * >0 is the number of supported pmu event symbols
49 */
50 static int perf_pmu_events_list_num;
51
52 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
53 [PERF_COUNT_HW_CPU_CYCLES] = {
54 .symbol = "cpu-cycles",
55 .alias = "cycles",
56 },
57 [PERF_COUNT_HW_INSTRUCTIONS] = {
58 .symbol = "instructions",
59 .alias = "",
60 },
61 [PERF_COUNT_HW_CACHE_REFERENCES] = {
62 .symbol = "cache-references",
63 .alias = "",
64 },
65 [PERF_COUNT_HW_CACHE_MISSES] = {
66 .symbol = "cache-misses",
67 .alias = "",
68 },
69 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
70 .symbol = "branch-instructions",
71 .alias = "branches",
72 },
73 [PERF_COUNT_HW_BRANCH_MISSES] = {
74 .symbol = "branch-misses",
75 .alias = "",
76 },
77 [PERF_COUNT_HW_BUS_CYCLES] = {
78 .symbol = "bus-cycles",
79 .alias = "",
80 },
81 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
82 .symbol = "stalled-cycles-frontend",
83 .alias = "idle-cycles-frontend",
84 },
85 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
86 .symbol = "stalled-cycles-backend",
87 .alias = "idle-cycles-backend",
88 },
89 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
90 .symbol = "ref-cycles",
91 .alias = "",
92 },
93 };
94
95 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
96 [PERF_COUNT_SW_CPU_CLOCK] = {
97 .symbol = "cpu-clock",
98 .alias = "",
99 },
100 [PERF_COUNT_SW_TASK_CLOCK] = {
101 .symbol = "task-clock",
102 .alias = "",
103 },
104 [PERF_COUNT_SW_PAGE_FAULTS] = {
105 .symbol = "page-faults",
106 .alias = "faults",
107 },
108 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
109 .symbol = "context-switches",
110 .alias = "cs",
111 },
112 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
113 .symbol = "cpu-migrations",
114 .alias = "migrations",
115 },
116 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
117 .symbol = "minor-faults",
118 .alias = "",
119 },
120 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
121 .symbol = "major-faults",
122 .alias = "",
123 },
124 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
125 .symbol = "alignment-faults",
126 .alias = "",
127 },
128 [PERF_COUNT_SW_EMULATION_FAULTS] = {
129 .symbol = "emulation-faults",
130 .alias = "",
131 },
132 [PERF_COUNT_SW_DUMMY] = {
133 .symbol = "dummy",
134 .alias = "",
135 },
136 [PERF_COUNT_SW_BPF_OUTPUT] = {
137 .symbol = "bpf-output",
138 .alias = "",
139 },
140 };
141
142 #define __PERF_EVENT_FIELD(config, name) \
143 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
144
145 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
146 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
147 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
148 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
149
150 #define for_each_subsystem(sys_dir, sys_dirent) \
151 while ((sys_dirent = readdir(sys_dir)) != NULL) \
152 if (sys_dirent->d_type == DT_DIR && \
153 (strcmp(sys_dirent->d_name, ".")) && \
154 (strcmp(sys_dirent->d_name, "..")))
155
156 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
157 {
158 char evt_path[MAXPATHLEN];
159 int fd;
160
161 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
162 sys_dir->d_name, evt_dir->d_name);
163 fd = open(evt_path, O_RDONLY);
164 if (fd < 0)
165 return -EINVAL;
166 close(fd);
167
168 return 0;
169 }
170
171 #define for_each_event(sys_dirent, evt_dir, evt_dirent) \
172 while ((evt_dirent = readdir(evt_dir)) != NULL) \
173 if (evt_dirent->d_type == DT_DIR && \
174 (strcmp(evt_dirent->d_name, ".")) && \
175 (strcmp(evt_dirent->d_name, "..")) && \
176 (!tp_event_has_id(sys_dirent, evt_dirent)))
177
178 #define MAX_EVENT_LENGTH 512
179
180
181 struct tracepoint_path *tracepoint_id_to_path(u64 config)
182 {
183 struct tracepoint_path *path = NULL;
184 DIR *sys_dir, *evt_dir;
185 struct dirent *sys_dirent, *evt_dirent;
186 char id_buf[24];
187 int fd;
188 u64 id;
189 char evt_path[MAXPATHLEN];
190 char dir_path[MAXPATHLEN];
191
192 sys_dir = opendir(tracing_events_path);
193 if (!sys_dir)
194 return NULL;
195
196 for_each_subsystem(sys_dir, sys_dirent) {
197
198 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
199 sys_dirent->d_name);
200 evt_dir = opendir(dir_path);
201 if (!evt_dir)
202 continue;
203
204 for_each_event(sys_dirent, evt_dir, evt_dirent) {
205
206 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
207 evt_dirent->d_name);
208 fd = open(evt_path, O_RDONLY);
209 if (fd < 0)
210 continue;
211 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
212 close(fd);
213 continue;
214 }
215 close(fd);
216 id = atoll(id_buf);
217 if (id == config) {
218 closedir(evt_dir);
219 closedir(sys_dir);
220 path = zalloc(sizeof(*path));
221 if (!path)
222 return NULL;
223 path->system = malloc(MAX_EVENT_LENGTH);
224 if (!path->system) {
225 free(path);
226 return NULL;
227 }
228 path->name = malloc(MAX_EVENT_LENGTH);
229 if (!path->name) {
230 zfree(&path->system);
231 free(path);
232 return NULL;
233 }
234 strncpy(path->system, sys_dirent->d_name,
235 MAX_EVENT_LENGTH);
236 strncpy(path->name, evt_dirent->d_name,
237 MAX_EVENT_LENGTH);
238 return path;
239 }
240 }
241 closedir(evt_dir);
242 }
243
244 closedir(sys_dir);
245 return NULL;
246 }
247
248 struct tracepoint_path *tracepoint_name_to_path(const char *name)
249 {
250 struct tracepoint_path *path = zalloc(sizeof(*path));
251 char *str = strchr(name, ':');
252
253 if (path == NULL || str == NULL) {
254 free(path);
255 return NULL;
256 }
257
258 path->system = strndup(name, str - name);
259 path->name = strdup(str+1);
260
261 if (path->system == NULL || path->name == NULL) {
262 zfree(&path->system);
263 zfree(&path->name);
264 zfree(&path);
265 }
266
267 return path;
268 }
269
270 const char *event_type(int type)
271 {
272 switch (type) {
273 case PERF_TYPE_HARDWARE:
274 return "hardware";
275
276 case PERF_TYPE_SOFTWARE:
277 return "software";
278
279 case PERF_TYPE_TRACEPOINT:
280 return "tracepoint";
281
282 case PERF_TYPE_HW_CACHE:
283 return "hardware-cache";
284
285 default:
286 break;
287 }
288
289 return "unknown";
290 }
291
292 static int parse_events__is_name_term(struct parse_events_term *term)
293 {
294 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
295 }
296
297 static char *get_config_name(struct list_head *head_terms)
298 {
299 struct parse_events_term *term;
300
301 if (!head_terms)
302 return NULL;
303
304 list_for_each_entry(term, head_terms, list)
305 if (parse_events__is_name_term(term))
306 return term->val.str;
307
308 return NULL;
309 }
310
311 static struct perf_evsel *
312 __add_event(struct list_head *list, int *idx,
313 struct perf_event_attr *attr,
314 char *name, struct perf_pmu *pmu,
315 struct list_head *config_terms, bool auto_merge_stats)
316 {
317 struct perf_evsel *evsel;
318 struct cpu_map *cpus = pmu ? pmu->cpus : NULL;
319
320 event_attr_init(attr);
321
322 evsel = perf_evsel__new_idx(attr, *idx);
323 if (!evsel)
324 return NULL;
325
326 (*idx)++;
327 evsel->cpus = cpu_map__get(cpus);
328 evsel->own_cpus = cpu_map__get(cpus);
329 evsel->system_wide = pmu ? pmu->is_uncore : false;
330 evsel->auto_merge_stats = auto_merge_stats;
331
332 if (name)
333 evsel->name = strdup(name);
334
335 if (config_terms)
336 list_splice(config_terms, &evsel->config_terms);
337
338 list_add_tail(&evsel->node, list);
339 return evsel;
340 }
341
342 static int add_event(struct list_head *list, int *idx,
343 struct perf_event_attr *attr, char *name,
344 struct list_head *config_terms)
345 {
346 return __add_event(list, idx, attr, name, NULL, config_terms, false) ? 0 : -ENOMEM;
347 }
348
349 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
350 {
351 int i, j;
352 int n, longest = -1;
353
354 for (i = 0; i < size; i++) {
355 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
356 n = strlen(names[i][j]);
357 if (n > longest && !strncasecmp(str, names[i][j], n))
358 longest = n;
359 }
360 if (longest > 0)
361 return i;
362 }
363
364 return -1;
365 }
366
367 typedef int config_term_func_t(struct perf_event_attr *attr,
368 struct parse_events_term *term,
369 struct parse_events_error *err);
370 static int config_term_common(struct perf_event_attr *attr,
371 struct parse_events_term *term,
372 struct parse_events_error *err);
373 static int config_attr(struct perf_event_attr *attr,
374 struct list_head *head,
375 struct parse_events_error *err,
376 config_term_func_t config_term);
377
378 int parse_events_add_cache(struct list_head *list, int *idx,
379 char *type, char *op_result1, char *op_result2,
380 struct parse_events_error *err,
381 struct list_head *head_config)
382 {
383 struct perf_event_attr attr;
384 LIST_HEAD(config_terms);
385 char name[MAX_NAME_LEN], *config_name;
386 int cache_type = -1, cache_op = -1, cache_result = -1;
387 char *op_result[2] = { op_result1, op_result2 };
388 int i, n;
389
390 /*
391 * No fallback - if we cannot get a clear cache type
392 * then bail out:
393 */
394 cache_type = parse_aliases(type, perf_evsel__hw_cache,
395 PERF_COUNT_HW_CACHE_MAX);
396 if (cache_type == -1)
397 return -EINVAL;
398
399 config_name = get_config_name(head_config);
400 n = snprintf(name, MAX_NAME_LEN, "%s", type);
401
402 for (i = 0; (i < 2) && (op_result[i]); i++) {
403 char *str = op_result[i];
404
405 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
406
407 if (cache_op == -1) {
408 cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
409 PERF_COUNT_HW_CACHE_OP_MAX);
410 if (cache_op >= 0) {
411 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
412 return -EINVAL;
413 continue;
414 }
415 }
416
417 if (cache_result == -1) {
418 cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
419 PERF_COUNT_HW_CACHE_RESULT_MAX);
420 if (cache_result >= 0)
421 continue;
422 }
423 }
424
425 /*
426 * Fall back to reads:
427 */
428 if (cache_op == -1)
429 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
430
431 /*
432 * Fall back to accesses:
433 */
434 if (cache_result == -1)
435 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
436
437 memset(&attr, 0, sizeof(attr));
438 attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
439 attr.type = PERF_TYPE_HW_CACHE;
440
441 if (head_config) {
442 if (config_attr(&attr, head_config, err,
443 config_term_common))
444 return -EINVAL;
445
446 if (get_config_terms(head_config, &config_terms))
447 return -ENOMEM;
448 }
449 return add_event(list, idx, &attr, config_name ? : name, &config_terms);
450 }
451
452 static void tracepoint_error(struct parse_events_error *e, int err,
453 const char *sys, const char *name)
454 {
455 char help[BUFSIZ];
456
457 if (!e)
458 return;
459
460 /*
461 * We get error directly from syscall errno ( > 0),
462 * or from encoded pointer's error ( < 0).
463 */
464 err = abs(err);
465
466 switch (err) {
467 case EACCES:
468 e->str = strdup("can't access trace events");
469 break;
470 case ENOENT:
471 e->str = strdup("unknown tracepoint");
472 break;
473 default:
474 e->str = strdup("failed to add tracepoint");
475 break;
476 }
477
478 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
479 e->help = strdup(help);
480 }
481
482 static int add_tracepoint(struct list_head *list, int *idx,
483 const char *sys_name, const char *evt_name,
484 struct parse_events_error *err,
485 struct list_head *head_config)
486 {
487 struct perf_evsel *evsel;
488
489 evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
490 if (IS_ERR(evsel)) {
491 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
492 return PTR_ERR(evsel);
493 }
494
495 if (head_config) {
496 LIST_HEAD(config_terms);
497
498 if (get_config_terms(head_config, &config_terms))
499 return -ENOMEM;
500 list_splice(&config_terms, &evsel->config_terms);
501 }
502
503 list_add_tail(&evsel->node, list);
504 return 0;
505 }
506
507 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
508 const char *sys_name, const char *evt_name,
509 struct parse_events_error *err,
510 struct list_head *head_config)
511 {
512 char evt_path[MAXPATHLEN];
513 struct dirent *evt_ent;
514 DIR *evt_dir;
515 int ret = 0, found = 0;
516
517 snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
518 evt_dir = opendir(evt_path);
519 if (!evt_dir) {
520 tracepoint_error(err, errno, sys_name, evt_name);
521 return -1;
522 }
523
524 while (!ret && (evt_ent = readdir(evt_dir))) {
525 if (!strcmp(evt_ent->d_name, ".")
526 || !strcmp(evt_ent->d_name, "..")
527 || !strcmp(evt_ent->d_name, "enable")
528 || !strcmp(evt_ent->d_name, "filter"))
529 continue;
530
531 if (!strglobmatch(evt_ent->d_name, evt_name))
532 continue;
533
534 found++;
535
536 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
537 err, head_config);
538 }
539
540 if (!found) {
541 tracepoint_error(err, ENOENT, sys_name, evt_name);
542 ret = -1;
543 }
544
545 closedir(evt_dir);
546 return ret;
547 }
548
549 static int add_tracepoint_event(struct list_head *list, int *idx,
550 const char *sys_name, const char *evt_name,
551 struct parse_events_error *err,
552 struct list_head *head_config)
553 {
554 return strpbrk(evt_name, "*?") ?
555 add_tracepoint_multi_event(list, idx, sys_name, evt_name,
556 err, head_config) :
557 add_tracepoint(list, idx, sys_name, evt_name,
558 err, head_config);
559 }
560
561 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
562 const char *sys_name, const char *evt_name,
563 struct parse_events_error *err,
564 struct list_head *head_config)
565 {
566 struct dirent *events_ent;
567 DIR *events_dir;
568 int ret = 0;
569
570 events_dir = opendir(tracing_events_path);
571 if (!events_dir) {
572 tracepoint_error(err, errno, sys_name, evt_name);
573 return -1;
574 }
575
576 while (!ret && (events_ent = readdir(events_dir))) {
577 if (!strcmp(events_ent->d_name, ".")
578 || !strcmp(events_ent->d_name, "..")
579 || !strcmp(events_ent->d_name, "enable")
580 || !strcmp(events_ent->d_name, "header_event")
581 || !strcmp(events_ent->d_name, "header_page"))
582 continue;
583
584 if (!strglobmatch(events_ent->d_name, sys_name))
585 continue;
586
587 ret = add_tracepoint_event(list, idx, events_ent->d_name,
588 evt_name, err, head_config);
589 }
590
591 closedir(events_dir);
592 return ret;
593 }
594
595 struct __add_bpf_event_param {
596 struct parse_events_state *parse_state;
597 struct list_head *list;
598 struct list_head *head_config;
599 };
600
601 static int add_bpf_event(const char *group, const char *event, int fd,
602 void *_param)
603 {
604 LIST_HEAD(new_evsels);
605 struct __add_bpf_event_param *param = _param;
606 struct parse_events_state *parse_state = param->parse_state;
607 struct list_head *list = param->list;
608 struct perf_evsel *pos;
609 int err;
610
611 pr_debug("add bpf event %s:%s and attach bpf program %d\n",
612 group, event, fd);
613
614 err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
615 event, parse_state->error,
616 param->head_config);
617 if (err) {
618 struct perf_evsel *evsel, *tmp;
619
620 pr_debug("Failed to add BPF event %s:%s\n",
621 group, event);
622 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
623 list_del(&evsel->node);
624 perf_evsel__delete(evsel);
625 }
626 return err;
627 }
628 pr_debug("adding %s:%s\n", group, event);
629
630 list_for_each_entry(pos, &new_evsels, node) {
631 pr_debug("adding %s:%s to %p\n",
632 group, event, pos);
633 pos->bpf_fd = fd;
634 }
635 list_splice(&new_evsels, list);
636 return 0;
637 }
638
639 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
640 struct list_head *list,
641 struct bpf_object *obj,
642 struct list_head *head_config)
643 {
644 int err;
645 char errbuf[BUFSIZ];
646 struct __add_bpf_event_param param = {parse_state, list, head_config};
647 static bool registered_unprobe_atexit = false;
648
649 if (IS_ERR(obj) || !obj) {
650 snprintf(errbuf, sizeof(errbuf),
651 "Internal error: load bpf obj with NULL");
652 err = -EINVAL;
653 goto errout;
654 }
655
656 /*
657 * Register atexit handler before calling bpf__probe() so
658 * bpf__probe() don't need to unprobe probe points its already
659 * created when failure.
660 */
661 if (!registered_unprobe_atexit) {
662 atexit(bpf__clear);
663 registered_unprobe_atexit = true;
664 }
665
666 err = bpf__probe(obj);
667 if (err) {
668 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
669 goto errout;
670 }
671
672 err = bpf__load(obj);
673 if (err) {
674 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
675 goto errout;
676 }
677
678 err = bpf__foreach_event(obj, add_bpf_event, &param);
679 if (err) {
680 snprintf(errbuf, sizeof(errbuf),
681 "Attach events in BPF object failed");
682 goto errout;
683 }
684
685 return 0;
686 errout:
687 parse_state->error->help = strdup("(add -v to see detail)");
688 parse_state->error->str = strdup(errbuf);
689 return err;
690 }
691
692 static int
693 parse_events_config_bpf(struct parse_events_state *parse_state,
694 struct bpf_object *obj,
695 struct list_head *head_config)
696 {
697 struct parse_events_term *term;
698 int error_pos;
699
700 if (!head_config || list_empty(head_config))
701 return 0;
702
703 list_for_each_entry(term, head_config, list) {
704 char errbuf[BUFSIZ];
705 int err;
706
707 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
708 snprintf(errbuf, sizeof(errbuf),
709 "Invalid config term for BPF object");
710 errbuf[BUFSIZ - 1] = '\0';
711
712 parse_state->error->idx = term->err_term;
713 parse_state->error->str = strdup(errbuf);
714 return -EINVAL;
715 }
716
717 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
718 if (err) {
719 bpf__strerror_config_obj(obj, term, parse_state->evlist,
720 &error_pos, err, errbuf,
721 sizeof(errbuf));
722 parse_state->error->help = strdup(
723 "Hint:\tValid config terms:\n"
724 " \tmap:[<arraymap>].value<indices>=[value]\n"
725 " \tmap:[<eventmap>].event<indices>=[event]\n"
726 "\n"
727 " \twhere <indices> is something like [0,3...5] or [all]\n"
728 " \t(add -v to see detail)");
729 parse_state->error->str = strdup(errbuf);
730 if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
731 parse_state->error->idx = term->err_val;
732 else
733 parse_state->error->idx = term->err_term + error_pos;
734 return err;
735 }
736 }
737 return 0;
738 }
739
740 /*
741 * Split config terms:
742 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
743 * 'call-graph=fp' is 'evt config', should be applied to each
744 * events in bpf.c.
745 * 'map:array.value[0]=1' is 'obj config', should be processed
746 * with parse_events_config_bpf.
747 *
748 * Move object config terms from the first list to obj_head_config.
749 */
750 static void
751 split_bpf_config_terms(struct list_head *evt_head_config,
752 struct list_head *obj_head_config)
753 {
754 struct parse_events_term *term, *temp;
755
756 /*
757 * Currectly, all possible user config term
758 * belong to bpf object. parse_events__is_hardcoded_term()
759 * happends to be a good flag.
760 *
761 * See parse_events_config_bpf() and
762 * config_term_tracepoint().
763 */
764 list_for_each_entry_safe(term, temp, evt_head_config, list)
765 if (!parse_events__is_hardcoded_term(term))
766 list_move_tail(&term->list, obj_head_config);
767 }
768
769 int parse_events_load_bpf(struct parse_events_state *parse_state,
770 struct list_head *list,
771 char *bpf_file_name,
772 bool source,
773 struct list_head *head_config)
774 {
775 int err;
776 struct bpf_object *obj;
777 LIST_HEAD(obj_head_config);
778
779 if (head_config)
780 split_bpf_config_terms(head_config, &obj_head_config);
781
782 obj = bpf__prepare_load(bpf_file_name, source);
783 if (IS_ERR(obj)) {
784 char errbuf[BUFSIZ];
785
786 err = PTR_ERR(obj);
787
788 if (err == -ENOTSUP)
789 snprintf(errbuf, sizeof(errbuf),
790 "BPF support is not compiled");
791 else
792 bpf__strerror_prepare_load(bpf_file_name,
793 source,
794 -err, errbuf,
795 sizeof(errbuf));
796
797 parse_state->error->help = strdup("(add -v to see detail)");
798 parse_state->error->str = strdup(errbuf);
799 return err;
800 }
801
802 err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
803 if (err)
804 return err;
805 err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
806
807 /*
808 * Caller doesn't know anything about obj_head_config,
809 * so combine them together again before returnning.
810 */
811 if (head_config)
812 list_splice_tail(&obj_head_config, head_config);
813 return err;
814 }
815
816 static int
817 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
818 {
819 int i;
820
821 for (i = 0; i < 3; i++) {
822 if (!type || !type[i])
823 break;
824
825 #define CHECK_SET_TYPE(bit) \
826 do { \
827 if (attr->bp_type & bit) \
828 return -EINVAL; \
829 else \
830 attr->bp_type |= bit; \
831 } while (0)
832
833 switch (type[i]) {
834 case 'r':
835 CHECK_SET_TYPE(HW_BREAKPOINT_R);
836 break;
837 case 'w':
838 CHECK_SET_TYPE(HW_BREAKPOINT_W);
839 break;
840 case 'x':
841 CHECK_SET_TYPE(HW_BREAKPOINT_X);
842 break;
843 default:
844 return -EINVAL;
845 }
846 }
847
848 #undef CHECK_SET_TYPE
849
850 if (!attr->bp_type) /* Default */
851 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
852
853 return 0;
854 }
855
856 int parse_events_add_breakpoint(struct list_head *list, int *idx,
857 void *ptr, char *type, u64 len)
858 {
859 struct perf_event_attr attr;
860
861 memset(&attr, 0, sizeof(attr));
862 attr.bp_addr = (unsigned long) ptr;
863
864 if (parse_breakpoint_type(type, &attr))
865 return -EINVAL;
866
867 /* Provide some defaults if len is not specified */
868 if (!len) {
869 if (attr.bp_type == HW_BREAKPOINT_X)
870 len = sizeof(long);
871 else
872 len = HW_BREAKPOINT_LEN_4;
873 }
874
875 attr.bp_len = len;
876
877 attr.type = PERF_TYPE_BREAKPOINT;
878 attr.sample_period = 1;
879
880 return add_event(list, idx, &attr, NULL, NULL);
881 }
882
883 static int check_type_val(struct parse_events_term *term,
884 struct parse_events_error *err,
885 int type)
886 {
887 if (type == term->type_val)
888 return 0;
889
890 if (err) {
891 err->idx = term->err_val;
892 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
893 err->str = strdup("expected numeric value");
894 else
895 err->str = strdup("expected string value");
896 }
897 return -EINVAL;
898 }
899
900 /*
901 * Update according to parse-events.l
902 */
903 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
904 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>",
905 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config",
906 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1",
907 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2",
908 [PARSE_EVENTS__TERM_TYPE_NAME] = "name",
909 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period",
910 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq",
911 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type",
912 [PARSE_EVENTS__TERM_TYPE_TIME] = "time",
913 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph",
914 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size",
915 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit",
916 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit",
917 [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack",
918 [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite",
919 [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite",
920 [PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config",
921 };
922
923 static bool config_term_shrinked;
924
925 static bool
926 config_term_avail(int term_type, struct parse_events_error *err)
927 {
928 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
929 err->str = strdup("Invalid term_type");
930 return false;
931 }
932 if (!config_term_shrinked)
933 return true;
934
935 switch (term_type) {
936 case PARSE_EVENTS__TERM_TYPE_CONFIG:
937 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
938 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
939 case PARSE_EVENTS__TERM_TYPE_NAME:
940 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
941 return true;
942 default:
943 if (!err)
944 return false;
945
946 /* term_type is validated so indexing is safe */
947 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
948 config_term_names[term_type]) < 0)
949 err->str = NULL;
950 return false;
951 }
952 }
953
954 void parse_events__shrink_config_terms(void)
955 {
956 config_term_shrinked = true;
957 }
958
959 static int config_term_common(struct perf_event_attr *attr,
960 struct parse_events_term *term,
961 struct parse_events_error *err)
962 {
963 #define CHECK_TYPE_VAL(type) \
964 do { \
965 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
966 return -EINVAL; \
967 } while (0)
968
969 switch (term->type_term) {
970 case PARSE_EVENTS__TERM_TYPE_CONFIG:
971 CHECK_TYPE_VAL(NUM);
972 attr->config = term->val.num;
973 break;
974 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
975 CHECK_TYPE_VAL(NUM);
976 attr->config1 = term->val.num;
977 break;
978 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
979 CHECK_TYPE_VAL(NUM);
980 attr->config2 = term->val.num;
981 break;
982 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
983 CHECK_TYPE_VAL(NUM);
984 break;
985 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
986 CHECK_TYPE_VAL(NUM);
987 break;
988 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
989 CHECK_TYPE_VAL(STR);
990 if (strcmp(term->val.str, "no") &&
991 parse_branch_str(term->val.str, &attr->branch_sample_type)) {
992 err->str = strdup("invalid branch sample type");
993 err->idx = term->err_val;
994 return -EINVAL;
995 }
996 break;
997 case PARSE_EVENTS__TERM_TYPE_TIME:
998 CHECK_TYPE_VAL(NUM);
999 if (term->val.num > 1) {
1000 err->str = strdup("expected 0 or 1");
1001 err->idx = term->err_val;
1002 return -EINVAL;
1003 }
1004 break;
1005 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1006 CHECK_TYPE_VAL(STR);
1007 break;
1008 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1009 CHECK_TYPE_VAL(NUM);
1010 break;
1011 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1012 CHECK_TYPE_VAL(NUM);
1013 break;
1014 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1015 CHECK_TYPE_VAL(NUM);
1016 break;
1017 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1018 CHECK_TYPE_VAL(NUM);
1019 break;
1020 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1021 CHECK_TYPE_VAL(NUM);
1022 break;
1023 case PARSE_EVENTS__TERM_TYPE_NAME:
1024 CHECK_TYPE_VAL(STR);
1025 break;
1026 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1027 CHECK_TYPE_VAL(NUM);
1028 break;
1029 default:
1030 err->str = strdup("unknown term");
1031 err->idx = term->err_term;
1032 err->help = parse_events_formats_error_string(NULL);
1033 return -EINVAL;
1034 }
1035
1036 /*
1037 * Check term availbility after basic checking so
1038 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1039 *
1040 * If check availbility at the entry of this function,
1041 * user will see "'<sysfs term>' is not usable in 'perf stat'"
1042 * if an invalid config term is provided for legacy events
1043 * (for example, instructions/badterm/...), which is confusing.
1044 */
1045 if (!config_term_avail(term->type_term, err))
1046 return -EINVAL;
1047 return 0;
1048 #undef CHECK_TYPE_VAL
1049 }
1050
1051 static int config_term_pmu(struct perf_event_attr *attr,
1052 struct parse_events_term *term,
1053 struct parse_events_error *err)
1054 {
1055 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1056 term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1057 /*
1058 * Always succeed for sysfs terms, as we dont know
1059 * at this point what type they need to have.
1060 */
1061 return 0;
1062 else
1063 return config_term_common(attr, term, err);
1064 }
1065
1066 static int config_term_tracepoint(struct perf_event_attr *attr,
1067 struct parse_events_term *term,
1068 struct parse_events_error *err)
1069 {
1070 switch (term->type_term) {
1071 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1072 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1073 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1074 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1075 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1076 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1077 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1078 return config_term_common(attr, term, err);
1079 default:
1080 if (err) {
1081 err->idx = term->err_term;
1082 err->str = strdup("unknown term");
1083 err->help = strdup("valid terms: call-graph,stack-size\n");
1084 }
1085 return -EINVAL;
1086 }
1087
1088 return 0;
1089 }
1090
1091 static int config_attr(struct perf_event_attr *attr,
1092 struct list_head *head,
1093 struct parse_events_error *err,
1094 config_term_func_t config_term)
1095 {
1096 struct parse_events_term *term;
1097
1098 list_for_each_entry(term, head, list)
1099 if (config_term(attr, term, err))
1100 return -EINVAL;
1101
1102 return 0;
1103 }
1104
1105 static int get_config_terms(struct list_head *head_config,
1106 struct list_head *head_terms __maybe_unused)
1107 {
1108 #define ADD_CONFIG_TERM(__type, __name, __val) \
1109 do { \
1110 struct perf_evsel_config_term *__t; \
1111 \
1112 __t = zalloc(sizeof(*__t)); \
1113 if (!__t) \
1114 return -ENOMEM; \
1115 \
1116 INIT_LIST_HEAD(&__t->list); \
1117 __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
1118 __t->val.__name = __val; \
1119 list_add_tail(&__t->list, head_terms); \
1120 } while (0)
1121
1122 struct parse_events_term *term;
1123
1124 list_for_each_entry(term, head_config, list) {
1125 switch (term->type_term) {
1126 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1127 ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1128 break;
1129 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1130 ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1131 break;
1132 case PARSE_EVENTS__TERM_TYPE_TIME:
1133 ADD_CONFIG_TERM(TIME, time, term->val.num);
1134 break;
1135 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1136 ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1137 break;
1138 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1139 ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1140 break;
1141 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1142 ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1143 break;
1144 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1145 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1146 break;
1147 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1148 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1149 break;
1150 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1151 ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1152 break;
1153 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1154 ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1155 break;
1156 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1157 ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1158 break;
1159 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1160 ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1161 break;
1162 default:
1163 break;
1164 }
1165 }
1166 #undef ADD_EVSEL_CONFIG
1167 return 0;
1168 }
1169
1170 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1171 const char *sys, const char *event,
1172 struct parse_events_error *err,
1173 struct list_head *head_config)
1174 {
1175 if (head_config) {
1176 struct perf_event_attr attr;
1177
1178 if (config_attr(&attr, head_config, err,
1179 config_term_tracepoint))
1180 return -EINVAL;
1181 }
1182
1183 if (strpbrk(sys, "*?"))
1184 return add_tracepoint_multi_sys(list, idx, sys, event,
1185 err, head_config);
1186 else
1187 return add_tracepoint_event(list, idx, sys, event,
1188 err, head_config);
1189 }
1190
1191 int parse_events_add_numeric(struct parse_events_state *parse_state,
1192 struct list_head *list,
1193 u32 type, u64 config,
1194 struct list_head *head_config)
1195 {
1196 struct perf_event_attr attr;
1197 LIST_HEAD(config_terms);
1198
1199 memset(&attr, 0, sizeof(attr));
1200 attr.type = type;
1201 attr.config = config;
1202
1203 if (head_config) {
1204 if (config_attr(&attr, head_config, parse_state->error,
1205 config_term_common))
1206 return -EINVAL;
1207
1208 if (get_config_terms(head_config, &config_terms))
1209 return -ENOMEM;
1210 }
1211
1212 return add_event(list, &parse_state->idx, &attr,
1213 get_config_name(head_config), &config_terms);
1214 }
1215
1216 static int __parse_events_add_pmu(struct parse_events_state *parse_state,
1217 struct list_head *list, char *name,
1218 struct list_head *head_config, bool auto_merge_stats)
1219 {
1220 struct perf_event_attr attr;
1221 struct perf_pmu_info info;
1222 struct perf_pmu *pmu;
1223 struct perf_evsel *evsel;
1224 struct parse_events_error *err = parse_state->error;
1225 LIST_HEAD(config_terms);
1226
1227 pmu = perf_pmu__find(name);
1228 if (!pmu) {
1229 if (asprintf(&err->str,
1230 "Cannot find PMU `%s'. Missing kernel support?",
1231 name) < 0)
1232 err->str = NULL;
1233 return -EINVAL;
1234 }
1235
1236 if (pmu->default_config) {
1237 memcpy(&attr, pmu->default_config,
1238 sizeof(struct perf_event_attr));
1239 } else {
1240 memset(&attr, 0, sizeof(attr));
1241 }
1242
1243 if (!head_config) {
1244 attr.type = pmu->type;
1245 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats);
1246 return evsel ? 0 : -ENOMEM;
1247 }
1248
1249 if (perf_pmu__check_alias(pmu, head_config, &info))
1250 return -EINVAL;
1251
1252 /*
1253 * Configure hardcoded terms first, no need to check
1254 * return value when called with fail == 0 ;)
1255 */
1256 if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1257 return -EINVAL;
1258
1259 if (get_config_terms(head_config, &config_terms))
1260 return -ENOMEM;
1261
1262 if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1263 return -EINVAL;
1264
1265 evsel = __add_event(list, &parse_state->idx, &attr,
1266 get_config_name(head_config), pmu,
1267 &config_terms, auto_merge_stats);
1268 if (evsel) {
1269 evsel->unit = info.unit;
1270 evsel->scale = info.scale;
1271 evsel->per_pkg = info.per_pkg;
1272 evsel->snapshot = info.snapshot;
1273 evsel->metric_expr = info.metric_expr;
1274 evsel->metric_name = info.metric_name;
1275 }
1276
1277 return evsel ? 0 : -ENOMEM;
1278 }
1279
1280 int parse_events_add_pmu(struct parse_events_state *parse_state,
1281 struct list_head *list, char *name,
1282 struct list_head *head_config)
1283 {
1284 return __parse_events_add_pmu(parse_state, list, name, head_config, false);
1285 }
1286
1287 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1288 char *str, struct list_head **listp)
1289 {
1290 struct list_head *head;
1291 struct parse_events_term *term;
1292 struct list_head *list;
1293 struct perf_pmu *pmu = NULL;
1294 int ok = 0;
1295
1296 *listp = NULL;
1297 /* Add it for all PMUs that support the alias */
1298 list = malloc(sizeof(struct list_head));
1299 if (!list)
1300 return -1;
1301 INIT_LIST_HEAD(list);
1302 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1303 struct perf_pmu_alias *alias;
1304
1305 list_for_each_entry(alias, &pmu->aliases, list) {
1306 if (!strcasecmp(alias->name, str)) {
1307 head = malloc(sizeof(struct list_head));
1308 if (!head)
1309 return -1;
1310 INIT_LIST_HEAD(head);
1311 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1312 str, 1, false, &str, NULL) < 0)
1313 return -1;
1314 list_add_tail(&term->list, head);
1315
1316 if (!__parse_events_add_pmu(parse_state, list,
1317 pmu->name, head, true)) {
1318 pr_debug("%s -> %s/%s/\n", str,
1319 pmu->name, alias->str);
1320 ok++;
1321 }
1322
1323 parse_events_terms__delete(head);
1324 }
1325 }
1326 }
1327 if (!ok)
1328 return -1;
1329 *listp = list;
1330 return 0;
1331 }
1332
1333 int parse_events__modifier_group(struct list_head *list,
1334 char *event_mod)
1335 {
1336 return parse_events__modifier_event(list, event_mod, true);
1337 }
1338
1339 void parse_events__set_leader(char *name, struct list_head *list)
1340 {
1341 struct perf_evsel *leader;
1342
1343 if (list_empty(list)) {
1344 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1345 return;
1346 }
1347
1348 __perf_evlist__set_leader(list);
1349 leader = list_entry(list->next, struct perf_evsel, node);
1350 leader->group_name = name ? strdup(name) : NULL;
1351 }
1352
1353 /* list_event is assumed to point to malloc'ed memory */
1354 void parse_events_update_lists(struct list_head *list_event,
1355 struct list_head *list_all)
1356 {
1357 /*
1358 * Called for single event definition. Update the
1359 * 'all event' list, and reinit the 'single event'
1360 * list, for next event definition.
1361 */
1362 list_splice_tail(list_event, list_all);
1363 free(list_event);
1364 }
1365
1366 struct event_modifier {
1367 int eu;
1368 int ek;
1369 int eh;
1370 int eH;
1371 int eG;
1372 int eI;
1373 int precise;
1374 int precise_max;
1375 int exclude_GH;
1376 int sample_read;
1377 int pinned;
1378 int weak;
1379 };
1380
1381 static int get_event_modifier(struct event_modifier *mod, char *str,
1382 struct perf_evsel *evsel)
1383 {
1384 int eu = evsel ? evsel->attr.exclude_user : 0;
1385 int ek = evsel ? evsel->attr.exclude_kernel : 0;
1386 int eh = evsel ? evsel->attr.exclude_hv : 0;
1387 int eH = evsel ? evsel->attr.exclude_host : 0;
1388 int eG = evsel ? evsel->attr.exclude_guest : 0;
1389 int eI = evsel ? evsel->attr.exclude_idle : 0;
1390 int precise = evsel ? evsel->attr.precise_ip : 0;
1391 int precise_max = 0;
1392 int sample_read = 0;
1393 int pinned = evsel ? evsel->attr.pinned : 0;
1394
1395 int exclude = eu | ek | eh;
1396 int exclude_GH = evsel ? evsel->exclude_GH : 0;
1397 int weak = 0;
1398
1399 memset(mod, 0, sizeof(*mod));
1400
1401 while (*str) {
1402 if (*str == 'u') {
1403 if (!exclude)
1404 exclude = eu = ek = eh = 1;
1405 eu = 0;
1406 } else if (*str == 'k') {
1407 if (!exclude)
1408 exclude = eu = ek = eh = 1;
1409 ek = 0;
1410 } else if (*str == 'h') {
1411 if (!exclude)
1412 exclude = eu = ek = eh = 1;
1413 eh = 0;
1414 } else if (*str == 'G') {
1415 if (!exclude_GH)
1416 exclude_GH = eG = eH = 1;
1417 eG = 0;
1418 } else if (*str == 'H') {
1419 if (!exclude_GH)
1420 exclude_GH = eG = eH = 1;
1421 eH = 0;
1422 } else if (*str == 'I') {
1423 eI = 1;
1424 } else if (*str == 'p') {
1425 precise++;
1426 /* use of precise requires exclude_guest */
1427 if (!exclude_GH)
1428 eG = 1;
1429 } else if (*str == 'P') {
1430 precise_max = 1;
1431 } else if (*str == 'S') {
1432 sample_read = 1;
1433 } else if (*str == 'D') {
1434 pinned = 1;
1435 } else if (*str == 'W') {
1436 weak = 1;
1437 } else
1438 break;
1439
1440 ++str;
1441 }
1442
1443 /*
1444 * precise ip:
1445 *
1446 * 0 - SAMPLE_IP can have arbitrary skid
1447 * 1 - SAMPLE_IP must have constant skid
1448 * 2 - SAMPLE_IP requested to have 0 skid
1449 * 3 - SAMPLE_IP must have 0 skid
1450 *
1451 * See also PERF_RECORD_MISC_EXACT_IP
1452 */
1453 if (precise > 3)
1454 return -EINVAL;
1455
1456 mod->eu = eu;
1457 mod->ek = ek;
1458 mod->eh = eh;
1459 mod->eH = eH;
1460 mod->eG = eG;
1461 mod->eI = eI;
1462 mod->precise = precise;
1463 mod->precise_max = precise_max;
1464 mod->exclude_GH = exclude_GH;
1465 mod->sample_read = sample_read;
1466 mod->pinned = pinned;
1467 mod->weak = weak;
1468
1469 return 0;
1470 }
1471
1472 /*
1473 * Basic modifier sanity check to validate it contains only one
1474 * instance of any modifier (apart from 'p') present.
1475 */
1476 static int check_modifier(char *str)
1477 {
1478 char *p = str;
1479
1480 /* The sizeof includes 0 byte as well. */
1481 if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1482 return -1;
1483
1484 while (*p) {
1485 if (*p != 'p' && strchr(p + 1, *p))
1486 return -1;
1487 p++;
1488 }
1489
1490 return 0;
1491 }
1492
1493 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1494 {
1495 struct perf_evsel *evsel;
1496 struct event_modifier mod;
1497
1498 if (str == NULL)
1499 return 0;
1500
1501 if (check_modifier(str))
1502 return -EINVAL;
1503
1504 if (!add && get_event_modifier(&mod, str, NULL))
1505 return -EINVAL;
1506
1507 __evlist__for_each_entry(list, evsel) {
1508 if (add && get_event_modifier(&mod, str, evsel))
1509 return -EINVAL;
1510
1511 evsel->attr.exclude_user = mod.eu;
1512 evsel->attr.exclude_kernel = mod.ek;
1513 evsel->attr.exclude_hv = mod.eh;
1514 evsel->attr.precise_ip = mod.precise;
1515 evsel->attr.exclude_host = mod.eH;
1516 evsel->attr.exclude_guest = mod.eG;
1517 evsel->attr.exclude_idle = mod.eI;
1518 evsel->exclude_GH = mod.exclude_GH;
1519 evsel->sample_read = mod.sample_read;
1520 evsel->precise_max = mod.precise_max;
1521 evsel->weak_group = mod.weak;
1522
1523 if (perf_evsel__is_group_leader(evsel))
1524 evsel->attr.pinned = mod.pinned;
1525 }
1526
1527 return 0;
1528 }
1529
1530 int parse_events_name(struct list_head *list, char *name)
1531 {
1532 struct perf_evsel *evsel;
1533
1534 __evlist__for_each_entry(list, evsel) {
1535 if (!evsel->name)
1536 evsel->name = strdup(name);
1537 }
1538
1539 return 0;
1540 }
1541
1542 static int
1543 comp_pmu(const void *p1, const void *p2)
1544 {
1545 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1546 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1547
1548 return strcasecmp(pmu1->symbol, pmu2->symbol);
1549 }
1550
1551 static void perf_pmu__parse_cleanup(void)
1552 {
1553 if (perf_pmu_events_list_num > 0) {
1554 struct perf_pmu_event_symbol *p;
1555 int i;
1556
1557 for (i = 0; i < perf_pmu_events_list_num; i++) {
1558 p = perf_pmu_events_list + i;
1559 zfree(&p->symbol);
1560 }
1561 zfree(&perf_pmu_events_list);
1562 perf_pmu_events_list_num = 0;
1563 }
1564 }
1565
1566 #define SET_SYMBOL(str, stype) \
1567 do { \
1568 p->symbol = str; \
1569 if (!p->symbol) \
1570 goto err; \
1571 p->type = stype; \
1572 } while (0)
1573
1574 /*
1575 * Read the pmu events list from sysfs
1576 * Save it into perf_pmu_events_list
1577 */
1578 static void perf_pmu__parse_init(void)
1579 {
1580
1581 struct perf_pmu *pmu = NULL;
1582 struct perf_pmu_alias *alias;
1583 int len = 0;
1584
1585 pmu = NULL;
1586 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1587 list_for_each_entry(alias, &pmu->aliases, list) {
1588 if (strchr(alias->name, '-'))
1589 len++;
1590 len++;
1591 }
1592 }
1593
1594 if (len == 0) {
1595 perf_pmu_events_list_num = -1;
1596 return;
1597 }
1598 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1599 if (!perf_pmu_events_list)
1600 return;
1601 perf_pmu_events_list_num = len;
1602
1603 len = 0;
1604 pmu = NULL;
1605 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1606 list_for_each_entry(alias, &pmu->aliases, list) {
1607 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1608 char *tmp = strchr(alias->name, '-');
1609
1610 if (tmp != NULL) {
1611 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1612 PMU_EVENT_SYMBOL_PREFIX);
1613 p++;
1614 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1615 len += 2;
1616 } else {
1617 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1618 len++;
1619 }
1620 }
1621 }
1622 qsort(perf_pmu_events_list, len,
1623 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1624
1625 return;
1626 err:
1627 perf_pmu__parse_cleanup();
1628 }
1629
1630 enum perf_pmu_event_symbol_type
1631 perf_pmu__parse_check(const char *name)
1632 {
1633 struct perf_pmu_event_symbol p, *r;
1634
1635 /* scan kernel pmu events from sysfs if needed */
1636 if (perf_pmu_events_list_num == 0)
1637 perf_pmu__parse_init();
1638 /*
1639 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1640 * cpu-cycles has been handled by hardcode.
1641 * So it must be cpu// events, not kernel pmu event.
1642 */
1643 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1644 return PMU_EVENT_SYMBOL_ERR;
1645
1646 p.symbol = strdup(name);
1647 r = bsearch(&p, perf_pmu_events_list,
1648 (size_t) perf_pmu_events_list_num,
1649 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1650 zfree(&p.symbol);
1651 return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1652 }
1653
1654 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1655 {
1656 YY_BUFFER_STATE buffer;
1657 void *scanner;
1658 int ret;
1659
1660 ret = parse_events_lex_init_extra(start_token, &scanner);
1661 if (ret)
1662 return ret;
1663
1664 buffer = parse_events__scan_string(str, scanner);
1665
1666 #ifdef PARSER_DEBUG
1667 parse_events_debug = 1;
1668 #endif
1669 ret = parse_events_parse(parse_state, scanner);
1670
1671 parse_events__flush_buffer(buffer, scanner);
1672 parse_events__delete_buffer(buffer, scanner);
1673 parse_events_lex_destroy(scanner);
1674 return ret;
1675 }
1676
1677 /*
1678 * parse event config string, return a list of event terms.
1679 */
1680 int parse_events_terms(struct list_head *terms, const char *str)
1681 {
1682 struct parse_events_state parse_state = {
1683 .terms = NULL,
1684 };
1685 int ret;
1686
1687 ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1688 if (!ret) {
1689 list_splice(parse_state.terms, terms);
1690 zfree(&parse_state.terms);
1691 return 0;
1692 }
1693
1694 parse_events_terms__delete(parse_state.terms);
1695 return ret;
1696 }
1697
1698 int parse_events(struct perf_evlist *evlist, const char *str,
1699 struct parse_events_error *err)
1700 {
1701 struct parse_events_state parse_state = {
1702 .list = LIST_HEAD_INIT(parse_state.list),
1703 .idx = evlist->nr_entries,
1704 .error = err,
1705 .evlist = evlist,
1706 };
1707 int ret;
1708
1709 ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1710 perf_pmu__parse_cleanup();
1711 if (!ret) {
1712 struct perf_evsel *last;
1713
1714 if (list_empty(&parse_state.list)) {
1715 WARN_ONCE(true, "WARNING: event parser found nothing");
1716 return -1;
1717 }
1718
1719 perf_evlist__splice_list_tail(evlist, &parse_state.list);
1720 evlist->nr_groups += parse_state.nr_groups;
1721 last = perf_evlist__last(evlist);
1722 last->cmdline_group_boundary = true;
1723
1724 return 0;
1725 }
1726
1727 /*
1728 * There are 2 users - builtin-record and builtin-test objects.
1729 * Both call perf_evlist__delete in case of error, so we dont
1730 * need to bother.
1731 */
1732 return ret;
1733 }
1734
1735 #define MAX_WIDTH 1000
1736 static int get_term_width(void)
1737 {
1738 struct winsize ws;
1739
1740 get_term_dimensions(&ws);
1741 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1742 }
1743
1744 void parse_events_print_error(struct parse_events_error *err,
1745 const char *event)
1746 {
1747 const char *str = "invalid or unsupported event: ";
1748 char _buf[MAX_WIDTH];
1749 char *buf = (char *) event;
1750 int idx = 0;
1751
1752 if (err->str) {
1753 /* -2 for extra '' in the final fprintf */
1754 int width = get_term_width() - 2;
1755 int len_event = strlen(event);
1756 int len_str, max_len, cut = 0;
1757
1758 /*
1759 * Maximum error index indent, we will cut
1760 * the event string if it's bigger.
1761 */
1762 int max_err_idx = 13;
1763
1764 /*
1765 * Let's be specific with the message when
1766 * we have the precise error.
1767 */
1768 str = "event syntax error: ";
1769 len_str = strlen(str);
1770 max_len = width - len_str;
1771
1772 buf = _buf;
1773
1774 /* We're cutting from the beginning. */
1775 if (err->idx > max_err_idx)
1776 cut = err->idx - max_err_idx;
1777
1778 strncpy(buf, event + cut, max_len);
1779
1780 /* Mark cut parts with '..' on both sides. */
1781 if (cut)
1782 buf[0] = buf[1] = '.';
1783
1784 if ((len_event - cut) > max_len) {
1785 buf[max_len - 1] = buf[max_len - 2] = '.';
1786 buf[max_len] = 0;
1787 }
1788
1789 idx = len_str + err->idx - cut;
1790 }
1791
1792 fprintf(stderr, "%s'%s'\n", str, buf);
1793 if (idx) {
1794 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1795 if (err->help)
1796 fprintf(stderr, "\n%s\n", err->help);
1797 zfree(&err->str);
1798 zfree(&err->help);
1799 }
1800 }
1801
1802 #undef MAX_WIDTH
1803
1804 int parse_events_option(const struct option *opt, const char *str,
1805 int unset __maybe_unused)
1806 {
1807 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1808 struct parse_events_error err = { .idx = 0, };
1809 int ret = parse_events(evlist, str, &err);
1810
1811 if (ret) {
1812 parse_events_print_error(&err, str);
1813 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1814 }
1815
1816 return ret;
1817 }
1818
1819 static int
1820 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1821 int (*func)(struct perf_evsel *evsel,
1822 const void *arg),
1823 const void *arg)
1824 {
1825 struct perf_evsel *last = NULL;
1826 int err;
1827
1828 /*
1829 * Don't return when list_empty, give func a chance to report
1830 * error when it found last == NULL.
1831 *
1832 * So no need to WARN here, let *func do this.
1833 */
1834 if (evlist->nr_entries > 0)
1835 last = perf_evlist__last(evlist);
1836
1837 do {
1838 err = (*func)(last, arg);
1839 if (err)
1840 return -1;
1841 if (!last)
1842 return 0;
1843
1844 if (last->node.prev == &evlist->entries)
1845 return 0;
1846 last = list_entry(last->node.prev, struct perf_evsel, node);
1847 } while (!last->cmdline_group_boundary);
1848
1849 return 0;
1850 }
1851
1852 static int set_filter(struct perf_evsel *evsel, const void *arg)
1853 {
1854 const char *str = arg;
1855 bool found = false;
1856 int nr_addr_filters = 0;
1857 struct perf_pmu *pmu = NULL;
1858
1859 if (evsel == NULL)
1860 goto err;
1861
1862 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
1863 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
1864 fprintf(stderr,
1865 "not enough memory to hold filter string\n");
1866 return -1;
1867 }
1868
1869 return 0;
1870 }
1871
1872 while ((pmu = perf_pmu__scan(pmu)) != NULL)
1873 if (pmu->type == evsel->attr.type) {
1874 found = true;
1875 break;
1876 }
1877
1878 if (found)
1879 perf_pmu__scan_file(pmu, "nr_addr_filters",
1880 "%d", &nr_addr_filters);
1881
1882 if (!nr_addr_filters)
1883 goto err;
1884
1885 if (perf_evsel__append_addr_filter(evsel, str) < 0) {
1886 fprintf(stderr,
1887 "not enough memory to hold filter string\n");
1888 return -1;
1889 }
1890
1891 return 0;
1892
1893 err:
1894 fprintf(stderr,
1895 "--filter option should follow a -e tracepoint or HW tracer option\n");
1896
1897 return -1;
1898 }
1899
1900 int parse_filter(const struct option *opt, const char *str,
1901 int unset __maybe_unused)
1902 {
1903 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1904
1905 return foreach_evsel_in_last_glob(evlist, set_filter,
1906 (const void *)str);
1907 }
1908
1909 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1910 const void *arg __maybe_unused)
1911 {
1912 char new_filter[64];
1913
1914 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1915 fprintf(stderr,
1916 "--exclude-perf option should follow a -e tracepoint option\n");
1917 return -1;
1918 }
1919
1920 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1921
1922 if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
1923 fprintf(stderr,
1924 "not enough memory to hold filter string\n");
1925 return -1;
1926 }
1927
1928 return 0;
1929 }
1930
1931 int exclude_perf(const struct option *opt,
1932 const char *arg __maybe_unused,
1933 int unset __maybe_unused)
1934 {
1935 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1936
1937 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1938 NULL);
1939 }
1940
1941 static const char * const event_type_descriptors[] = {
1942 "Hardware event",
1943 "Software event",
1944 "Tracepoint event",
1945 "Hardware cache event",
1946 "Raw hardware event descriptor",
1947 "Hardware breakpoint",
1948 };
1949
1950 static int cmp_string(const void *a, const void *b)
1951 {
1952 const char * const *as = a;
1953 const char * const *bs = b;
1954
1955 return strcmp(*as, *bs);
1956 }
1957
1958 /*
1959 * Print the events from <debugfs_mount_point>/tracing/events
1960 */
1961
1962 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1963 bool name_only)
1964 {
1965 DIR *sys_dir, *evt_dir;
1966 struct dirent *sys_dirent, *evt_dirent;
1967 char evt_path[MAXPATHLEN];
1968 char dir_path[MAXPATHLEN];
1969 char **evt_list = NULL;
1970 unsigned int evt_i = 0, evt_num = 0;
1971 bool evt_num_known = false;
1972
1973 restart:
1974 sys_dir = opendir(tracing_events_path);
1975 if (!sys_dir)
1976 return;
1977
1978 if (evt_num_known) {
1979 evt_list = zalloc(sizeof(char *) * evt_num);
1980 if (!evt_list)
1981 goto out_close_sys_dir;
1982 }
1983
1984 for_each_subsystem(sys_dir, sys_dirent) {
1985 if (subsys_glob != NULL &&
1986 !strglobmatch(sys_dirent->d_name, subsys_glob))
1987 continue;
1988
1989 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1990 sys_dirent->d_name);
1991 evt_dir = opendir(dir_path);
1992 if (!evt_dir)
1993 continue;
1994
1995 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1996 if (event_glob != NULL &&
1997 !strglobmatch(evt_dirent->d_name, event_glob))
1998 continue;
1999
2000 if (!evt_num_known) {
2001 evt_num++;
2002 continue;
2003 }
2004
2005 snprintf(evt_path, MAXPATHLEN, "%s:%s",
2006 sys_dirent->d_name, evt_dirent->d_name);
2007
2008 evt_list[evt_i] = strdup(evt_path);
2009 if (evt_list[evt_i] == NULL)
2010 goto out_close_evt_dir;
2011 evt_i++;
2012 }
2013 closedir(evt_dir);
2014 }
2015 closedir(sys_dir);
2016
2017 if (!evt_num_known) {
2018 evt_num_known = true;
2019 goto restart;
2020 }
2021 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2022 evt_i = 0;
2023 while (evt_i < evt_num) {
2024 if (name_only) {
2025 printf("%s ", evt_list[evt_i++]);
2026 continue;
2027 }
2028 printf(" %-50s [%s]\n", evt_list[evt_i++],
2029 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2030 }
2031 if (evt_num && pager_in_use())
2032 printf("\n");
2033
2034 out_free:
2035 evt_num = evt_i;
2036 for (evt_i = 0; evt_i < evt_num; evt_i++)
2037 zfree(&evt_list[evt_i]);
2038 zfree(&evt_list);
2039 return;
2040
2041 out_close_evt_dir:
2042 closedir(evt_dir);
2043 out_close_sys_dir:
2044 closedir(sys_dir);
2045
2046 printf("FATAL: not enough memory to print %s\n",
2047 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2048 if (evt_list)
2049 goto out_free;
2050 }
2051
2052 /*
2053 * Check whether event is in <debugfs_mount_point>/tracing/events
2054 */
2055
2056 int is_valid_tracepoint(const char *event_string)
2057 {
2058 DIR *sys_dir, *evt_dir;
2059 struct dirent *sys_dirent, *evt_dirent;
2060 char evt_path[MAXPATHLEN];
2061 char dir_path[MAXPATHLEN];
2062
2063 sys_dir = opendir(tracing_events_path);
2064 if (!sys_dir)
2065 return 0;
2066
2067 for_each_subsystem(sys_dir, sys_dirent) {
2068
2069 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
2070 sys_dirent->d_name);
2071 evt_dir = opendir(dir_path);
2072 if (!evt_dir)
2073 continue;
2074
2075 for_each_event(sys_dirent, evt_dir, evt_dirent) {
2076 snprintf(evt_path, MAXPATHLEN, "%s:%s",
2077 sys_dirent->d_name, evt_dirent->d_name);
2078 if (!strcmp(evt_path, event_string)) {
2079 closedir(evt_dir);
2080 closedir(sys_dir);
2081 return 1;
2082 }
2083 }
2084 closedir(evt_dir);
2085 }
2086 closedir(sys_dir);
2087 return 0;
2088 }
2089
2090 static bool is_event_supported(u8 type, unsigned config)
2091 {
2092 bool ret = true;
2093 int open_return;
2094 struct perf_evsel *evsel;
2095 struct perf_event_attr attr = {
2096 .type = type,
2097 .config = config,
2098 .disabled = 1,
2099 };
2100 struct thread_map *tmap = thread_map__new_by_tid(0);
2101
2102 if (tmap == NULL)
2103 return false;
2104
2105 evsel = perf_evsel__new(&attr);
2106 if (evsel) {
2107 open_return = perf_evsel__open(evsel, NULL, tmap);
2108 ret = open_return >= 0;
2109
2110 if (open_return == -EACCES) {
2111 /*
2112 * This happens if the paranoid value
2113 * /proc/sys/kernel/perf_event_paranoid is set to 2
2114 * Re-run with exclude_kernel set; we don't do that
2115 * by default as some ARM machines do not support it.
2116 *
2117 */
2118 evsel->attr.exclude_kernel = 1;
2119 ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2120 }
2121 perf_evsel__delete(evsel);
2122 }
2123
2124 return ret;
2125 }
2126
2127 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2128 bool name_only)
2129 {
2130 struct probe_cache *pcache;
2131 struct probe_cache_entry *ent;
2132 struct strlist *bidlist, *sdtlist;
2133 struct strlist_config cfg = {.dont_dupstr = true};
2134 struct str_node *nd, *nd2;
2135 char *buf, *path, *ptr = NULL;
2136 bool show_detail = false;
2137 int ret;
2138
2139 sdtlist = strlist__new(NULL, &cfg);
2140 if (!sdtlist) {
2141 pr_debug("Failed to allocate new strlist for SDT\n");
2142 return;
2143 }
2144 bidlist = build_id_cache__list_all(true);
2145 if (!bidlist) {
2146 pr_debug("Failed to get buildids: %d\n", errno);
2147 return;
2148 }
2149 strlist__for_each_entry(nd, bidlist) {
2150 pcache = probe_cache__new(nd->s, NULL);
2151 if (!pcache)
2152 continue;
2153 list_for_each_entry(ent, &pcache->entries, node) {
2154 if (!ent->sdt)
2155 continue;
2156 if (subsys_glob &&
2157 !strglobmatch(ent->pev.group, subsys_glob))
2158 continue;
2159 if (event_glob &&
2160 !strglobmatch(ent->pev.event, event_glob))
2161 continue;
2162 ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2163 ent->pev.event, nd->s);
2164 if (ret > 0)
2165 strlist__add(sdtlist, buf);
2166 }
2167 probe_cache__delete(pcache);
2168 }
2169 strlist__delete(bidlist);
2170
2171 strlist__for_each_entry(nd, sdtlist) {
2172 buf = strchr(nd->s, '@');
2173 if (buf)
2174 *(buf++) = '\0';
2175 if (name_only) {
2176 printf("%s ", nd->s);
2177 continue;
2178 }
2179 nd2 = strlist__next(nd);
2180 if (nd2) {
2181 ptr = strchr(nd2->s, '@');
2182 if (ptr)
2183 *ptr = '\0';
2184 if (strcmp(nd->s, nd2->s) == 0)
2185 show_detail = true;
2186 }
2187 if (show_detail) {
2188 path = build_id_cache__origname(buf);
2189 ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2190 if (ret > 0) {
2191 printf(" %-50s [%s]\n", buf, "SDT event");
2192 free(buf);
2193 }
2194 } else
2195 printf(" %-50s [%s]\n", nd->s, "SDT event");
2196 if (nd2) {
2197 if (strcmp(nd->s, nd2->s) != 0)
2198 show_detail = false;
2199 if (ptr)
2200 *ptr = '@';
2201 }
2202 }
2203 strlist__delete(sdtlist);
2204 }
2205
2206 int print_hwcache_events(const char *event_glob, bool name_only)
2207 {
2208 unsigned int type, op, i, evt_i = 0, evt_num = 0;
2209 char name[64];
2210 char **evt_list = NULL;
2211 bool evt_num_known = false;
2212
2213 restart:
2214 if (evt_num_known) {
2215 evt_list = zalloc(sizeof(char *) * evt_num);
2216 if (!evt_list)
2217 goto out_enomem;
2218 }
2219
2220 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2221 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2222 /* skip invalid cache type */
2223 if (!perf_evsel__is_cache_op_valid(type, op))
2224 continue;
2225
2226 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2227 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2228 name, sizeof(name));
2229 if (event_glob != NULL && !strglobmatch(name, event_glob))
2230 continue;
2231
2232 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2233 type | (op << 8) | (i << 16)))
2234 continue;
2235
2236 if (!evt_num_known) {
2237 evt_num++;
2238 continue;
2239 }
2240
2241 evt_list[evt_i] = strdup(name);
2242 if (evt_list[evt_i] == NULL)
2243 goto out_enomem;
2244 evt_i++;
2245 }
2246 }
2247 }
2248
2249 if (!evt_num_known) {
2250 evt_num_known = true;
2251 goto restart;
2252 }
2253 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2254 evt_i = 0;
2255 while (evt_i < evt_num) {
2256 if (name_only) {
2257 printf("%s ", evt_list[evt_i++]);
2258 continue;
2259 }
2260 printf(" %-50s [%s]\n", evt_list[evt_i++],
2261 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2262 }
2263 if (evt_num && pager_in_use())
2264 printf("\n");
2265
2266 out_free:
2267 evt_num = evt_i;
2268 for (evt_i = 0; evt_i < evt_num; evt_i++)
2269 zfree(&evt_list[evt_i]);
2270 zfree(&evt_list);
2271 return evt_num;
2272
2273 out_enomem:
2274 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2275 if (evt_list)
2276 goto out_free;
2277 return evt_num;
2278 }
2279
2280 void print_symbol_events(const char *event_glob, unsigned type,
2281 struct event_symbol *syms, unsigned max,
2282 bool name_only)
2283 {
2284 unsigned int i, evt_i = 0, evt_num = 0;
2285 char name[MAX_NAME_LEN];
2286 char **evt_list = NULL;
2287 bool evt_num_known = false;
2288
2289 restart:
2290 if (evt_num_known) {
2291 evt_list = zalloc(sizeof(char *) * evt_num);
2292 if (!evt_list)
2293 goto out_enomem;
2294 syms -= max;
2295 }
2296
2297 for (i = 0; i < max; i++, syms++) {
2298
2299 if (event_glob != NULL && syms->symbol != NULL &&
2300 !(strglobmatch(syms->symbol, event_glob) ||
2301 (syms->alias && strglobmatch(syms->alias, event_glob))))
2302 continue;
2303
2304 if (!is_event_supported(type, i))
2305 continue;
2306
2307 if (!evt_num_known) {
2308 evt_num++;
2309 continue;
2310 }
2311
2312 if (!name_only && strlen(syms->alias))
2313 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2314 else
2315 strncpy(name, syms->symbol, MAX_NAME_LEN);
2316
2317 evt_list[evt_i] = strdup(name);
2318 if (evt_list[evt_i] == NULL)
2319 goto out_enomem;
2320 evt_i++;
2321 }
2322
2323 if (!evt_num_known) {
2324 evt_num_known = true;
2325 goto restart;
2326 }
2327 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2328 evt_i = 0;
2329 while (evt_i < evt_num) {
2330 if (name_only) {
2331 printf("%s ", evt_list[evt_i++]);
2332 continue;
2333 }
2334 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2335 }
2336 if (evt_num && pager_in_use())
2337 printf("\n");
2338
2339 out_free:
2340 evt_num = evt_i;
2341 for (evt_i = 0; evt_i < evt_num; evt_i++)
2342 zfree(&evt_list[evt_i]);
2343 zfree(&evt_list);
2344 return;
2345
2346 out_enomem:
2347 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2348 if (evt_list)
2349 goto out_free;
2350 }
2351
2352 /*
2353 * Print the help text for the event symbols:
2354 */
2355 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2356 bool long_desc, bool details_flag)
2357 {
2358 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2359 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2360
2361 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2362 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2363
2364 print_hwcache_events(event_glob, name_only);
2365
2366 print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2367 details_flag);
2368
2369 if (event_glob != NULL)
2370 return;
2371
2372 if (!name_only) {
2373 printf(" %-50s [%s]\n",
2374 "rNNN",
2375 event_type_descriptors[PERF_TYPE_RAW]);
2376 printf(" %-50s [%s]\n",
2377 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2378 event_type_descriptors[PERF_TYPE_RAW]);
2379 if (pager_in_use())
2380 printf(" (see 'man perf-list' on how to encode it)\n\n");
2381
2382 printf(" %-50s [%s]\n",
2383 "mem:<addr>[/len][:access]",
2384 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2385 if (pager_in_use())
2386 printf("\n");
2387 }
2388
2389 print_tracepoint_events(NULL, NULL, name_only);
2390
2391 print_sdt_events(NULL, NULL, name_only);
2392
2393 metricgroup__print(true, true, NULL, name_only);
2394 }
2395
2396 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2397 {
2398 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2399 }
2400
2401 static int new_term(struct parse_events_term **_term,
2402 struct parse_events_term *temp,
2403 char *str, u64 num)
2404 {
2405 struct parse_events_term *term;
2406
2407 term = malloc(sizeof(*term));
2408 if (!term)
2409 return -ENOMEM;
2410
2411 *term = *temp;
2412 INIT_LIST_HEAD(&term->list);
2413
2414 switch (term->type_val) {
2415 case PARSE_EVENTS__TERM_TYPE_NUM:
2416 term->val.num = num;
2417 break;
2418 case PARSE_EVENTS__TERM_TYPE_STR:
2419 term->val.str = str;
2420 break;
2421 default:
2422 free(term);
2423 return -EINVAL;
2424 }
2425
2426 *_term = term;
2427 return 0;
2428 }
2429
2430 int parse_events_term__num(struct parse_events_term **term,
2431 int type_term, char *config, u64 num,
2432 bool no_value,
2433 void *loc_term_, void *loc_val_)
2434 {
2435 YYLTYPE *loc_term = loc_term_;
2436 YYLTYPE *loc_val = loc_val_;
2437
2438 struct parse_events_term temp = {
2439 .type_val = PARSE_EVENTS__TERM_TYPE_NUM,
2440 .type_term = type_term,
2441 .config = config,
2442 .no_value = no_value,
2443 .err_term = loc_term ? loc_term->first_column : 0,
2444 .err_val = loc_val ? loc_val->first_column : 0,
2445 };
2446
2447 return new_term(term, &temp, NULL, num);
2448 }
2449
2450 int parse_events_term__str(struct parse_events_term **term,
2451 int type_term, char *config, char *str,
2452 void *loc_term_, void *loc_val_)
2453 {
2454 YYLTYPE *loc_term = loc_term_;
2455 YYLTYPE *loc_val = loc_val_;
2456
2457 struct parse_events_term temp = {
2458 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
2459 .type_term = type_term,
2460 .config = config,
2461 .err_term = loc_term ? loc_term->first_column : 0,
2462 .err_val = loc_val ? loc_val->first_column : 0,
2463 };
2464
2465 return new_term(term, &temp, str, 0);
2466 }
2467
2468 int parse_events_term__sym_hw(struct parse_events_term **term,
2469 char *config, unsigned idx)
2470 {
2471 struct event_symbol *sym;
2472 struct parse_events_term temp = {
2473 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
2474 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2475 .config = config ?: (char *) "event",
2476 };
2477
2478 BUG_ON(idx >= PERF_COUNT_HW_MAX);
2479 sym = &event_symbols_hw[idx];
2480
2481 return new_term(term, &temp, (char *) sym->symbol, 0);
2482 }
2483
2484 int parse_events_term__clone(struct parse_events_term **new,
2485 struct parse_events_term *term)
2486 {
2487 struct parse_events_term temp = {
2488 .type_val = term->type_val,
2489 .type_term = term->type_term,
2490 .config = term->config,
2491 .err_term = term->err_term,
2492 .err_val = term->err_val,
2493 };
2494
2495 return new_term(new, &temp, term->val.str, term->val.num);
2496 }
2497
2498 int parse_events_copy_term_list(struct list_head *old,
2499 struct list_head **new)
2500 {
2501 struct parse_events_term *term, *n;
2502 int ret;
2503
2504 if (!old) {
2505 *new = NULL;
2506 return 0;
2507 }
2508
2509 *new = malloc(sizeof(struct list_head));
2510 if (!*new)
2511 return -ENOMEM;
2512 INIT_LIST_HEAD(*new);
2513
2514 list_for_each_entry (term, old, list) {
2515 ret = parse_events_term__clone(&n, term);
2516 if (ret)
2517 return ret;
2518 list_add_tail(&n->list, *new);
2519 }
2520 return 0;
2521 }
2522
2523 void parse_events_terms__purge(struct list_head *terms)
2524 {
2525 struct parse_events_term *term, *h;
2526
2527 list_for_each_entry_safe(term, h, terms, list) {
2528 if (term->array.nr_ranges)
2529 zfree(&term->array.ranges);
2530 list_del_init(&term->list);
2531 free(term);
2532 }
2533 }
2534
2535 void parse_events_terms__delete(struct list_head *terms)
2536 {
2537 if (!terms)
2538 return;
2539 parse_events_terms__purge(terms);
2540 free(terms);
2541 }
2542
2543 void parse_events__clear_array(struct parse_events_array *a)
2544 {
2545 zfree(&a->ranges);
2546 }
2547
2548 void parse_events_evlist_error(struct parse_events_state *parse_state,
2549 int idx, const char *str)
2550 {
2551 struct parse_events_error *err = parse_state->error;
2552
2553 if (!err)
2554 return;
2555 err->idx = idx;
2556 err->str = strdup(str);
2557 WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2558 }
2559
2560 static void config_terms_list(char *buf, size_t buf_sz)
2561 {
2562 int i;
2563 bool first = true;
2564
2565 buf[0] = '\0';
2566 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2567 const char *name = config_term_names[i];
2568
2569 if (!config_term_avail(i, NULL))
2570 continue;
2571 if (!name)
2572 continue;
2573 if (name[0] == '<')
2574 continue;
2575
2576 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2577 return;
2578
2579 if (!first)
2580 strcat(buf, ",");
2581 else
2582 first = false;
2583 strcat(buf, name);
2584 }
2585 }
2586
2587 /*
2588 * Return string contains valid config terms of an event.
2589 * @additional_terms: For terms such as PMU sysfs terms.
2590 */
2591 char *parse_events_formats_error_string(char *additional_terms)
2592 {
2593 char *str;
2594 /* "no-overwrite" is the longest name */
2595 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2596 (sizeof("no-overwrite") - 1)];
2597
2598 config_terms_list(static_terms, sizeof(static_terms));
2599 /* valid terms */
2600 if (additional_terms) {
2601 if (asprintf(&str, "valid terms: %s,%s",
2602 additional_terms, static_terms) < 0)
2603 goto fail;
2604 } else {
2605 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2606 goto fail;
2607 }
2608 return str;
2609
2610 fail:
2611 return NULL;
2612 }
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