projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'akpm' (patches from Andrew)
[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 "probe-file.h"
24 #include "asm/bug.h"
25
26 #define MAX_NAME_LEN 100
27
28 #ifdef PARSER_DEBUG
29 extern int parse_events_debug;
30 #endif
31 int parse_events_parse(void *data, void *scanner);
32 static int get_config_terms(struct list_head *head_config,
33 struct list_head *head_terms __maybe_unused);
34
35 static struct perf_pmu_event_symbol *perf_pmu_events_list;
36 /*
37 * The variable indicates the number of supported pmu event symbols.
38 * 0 means not initialized and ready to init
39 * -1 means failed to init, don't try anymore
40 * >0 is the number of supported pmu event symbols
41 */
42 static int perf_pmu_events_list_num;
43
44 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
45 [PERF_COUNT_HW_CPU_CYCLES] = {
46 .symbol = "cpu-cycles",
47 .alias = "cycles",
48 },
49 [PERF_COUNT_HW_INSTRUCTIONS] = {
50 .symbol = "instructions",
51 .alias = "",
52 },
53 [PERF_COUNT_HW_CACHE_REFERENCES] = {
54 .symbol = "cache-references",
55 .alias = "",
56 },
57 [PERF_COUNT_HW_CACHE_MISSES] = {
58 .symbol = "cache-misses",
59 .alias = "",
60 },
61 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
62 .symbol = "branch-instructions",
63 .alias = "branches",
64 },
65 [PERF_COUNT_HW_BRANCH_MISSES] = {
66 .symbol = "branch-misses",
67 .alias = "",
68 },
69 [PERF_COUNT_HW_BUS_CYCLES] = {
70 .symbol = "bus-cycles",
71 .alias = "",
72 },
73 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
74 .symbol = "stalled-cycles-frontend",
75 .alias = "idle-cycles-frontend",
76 },
77 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
78 .symbol = "stalled-cycles-backend",
79 .alias = "idle-cycles-backend",
80 },
81 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
82 .symbol = "ref-cycles",
83 .alias = "",
84 },
85 };
86
87 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
88 [PERF_COUNT_SW_CPU_CLOCK] = {
89 .symbol = "cpu-clock",
90 .alias = "",
91 },
92 [PERF_COUNT_SW_TASK_CLOCK] = {
93 .symbol = "task-clock",
94 .alias = "",
95 },
96 [PERF_COUNT_SW_PAGE_FAULTS] = {
97 .symbol = "page-faults",
98 .alias = "faults",
99 },
100 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
101 .symbol = "context-switches",
102 .alias = "cs",
103 },
104 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
105 .symbol = "cpu-migrations",
106 .alias = "migrations",
107 },
108 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
109 .symbol = "minor-faults",
110 .alias = "",
111 },
112 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
113 .symbol = "major-faults",
114 .alias = "",
115 },
116 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
117 .symbol = "alignment-faults",
118 .alias = "",
119 },
120 [PERF_COUNT_SW_EMULATION_FAULTS] = {
121 .symbol = "emulation-faults",
122 .alias = "",
123 },
124 [PERF_COUNT_SW_DUMMY] = {
125 .symbol = "dummy",
126 .alias = "",
127 },
128 [PERF_COUNT_SW_BPF_OUTPUT] = {
129 .symbol = "bpf-output",
130 .alias = "",
131 },
132 };
133
134 #define __PERF_EVENT_FIELD(config, name) \
135 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
136
137 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
138 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
139 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
140 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
141
142 #define for_each_subsystem(sys_dir, sys_dirent) \
143 while ((sys_dirent = readdir(sys_dir)) != NULL) \
144 if (sys_dirent->d_type == DT_DIR && \
145 (strcmp(sys_dirent->d_name, ".")) && \
146 (strcmp(sys_dirent->d_name, "..")))
147
148 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
149 {
150 char evt_path[MAXPATHLEN];
151 int fd;
152
153 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
154 sys_dir->d_name, evt_dir->d_name);
155 fd = open(evt_path, O_RDONLY);
156 if (fd < 0)
157 return -EINVAL;
158 close(fd);
159
160 return 0;
161 }
162
163 #define for_each_event(sys_dirent, evt_dir, evt_dirent) \
164 while ((evt_dirent = readdir(evt_dir)) != NULL) \
165 if (evt_dirent->d_type == DT_DIR && \
166 (strcmp(evt_dirent->d_name, ".")) && \
167 (strcmp(evt_dirent->d_name, "..")) && \
168 (!tp_event_has_id(sys_dirent, evt_dirent)))
169
170 #define MAX_EVENT_LENGTH 512
171
172
173 struct tracepoint_path *tracepoint_id_to_path(u64 config)
174 {
175 struct tracepoint_path *path = NULL;
176 DIR *sys_dir, *evt_dir;
177 struct dirent *sys_dirent, *evt_dirent;
178 char id_buf[24];
179 int fd;
180 u64 id;
181 char evt_path[MAXPATHLEN];
182 char dir_path[MAXPATHLEN];
183
184 sys_dir = opendir(tracing_events_path);
185 if (!sys_dir)
186 return NULL;
187
188 for_each_subsystem(sys_dir, sys_dirent) {
189
190 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
191 sys_dirent->d_name);
192 evt_dir = opendir(dir_path);
193 if (!evt_dir)
194 continue;
195
196 for_each_event(sys_dirent, evt_dir, evt_dirent) {
197
198 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
199 evt_dirent->d_name);
200 fd = open(evt_path, O_RDONLY);
201 if (fd < 0)
202 continue;
203 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
204 close(fd);
205 continue;
206 }
207 close(fd);
208 id = atoll(id_buf);
209 if (id == config) {
210 closedir(evt_dir);
211 closedir(sys_dir);
212 path = zalloc(sizeof(*path));
213 path->system = malloc(MAX_EVENT_LENGTH);
214 if (!path->system) {
215 free(path);
216 return NULL;
217 }
218 path->name = malloc(MAX_EVENT_LENGTH);
219 if (!path->name) {
220 zfree(&path->system);
221 free(path);
222 return NULL;
223 }
224 strncpy(path->system, sys_dirent->d_name,
225 MAX_EVENT_LENGTH);
226 strncpy(path->name, evt_dirent->d_name,
227 MAX_EVENT_LENGTH);
228 return path;
229 }
230 }
231 closedir(evt_dir);
232 }
233
234 closedir(sys_dir);
235 return NULL;
236 }
237
238 struct tracepoint_path *tracepoint_name_to_path(const char *name)
239 {
240 struct tracepoint_path *path = zalloc(sizeof(*path));
241 char *str = strchr(name, ':');
242
243 if (path == NULL || str == NULL) {
244 free(path);
245 return NULL;
246 }
247
248 path->system = strndup(name, str - name);
249 path->name = strdup(str+1);
250
251 if (path->system == NULL || path->name == NULL) {
252 zfree(&path->system);
253 zfree(&path->name);
254 free(path);
255 path = NULL;
256 }
257
258 return path;
259 }
260
261 const char *event_type(int type)
262 {
263 switch (type) {
264 case PERF_TYPE_HARDWARE:
265 return "hardware";
266
267 case PERF_TYPE_SOFTWARE:
268 return "software";
269
270 case PERF_TYPE_TRACEPOINT:
271 return "tracepoint";
272
273 case PERF_TYPE_HW_CACHE:
274 return "hardware-cache";
275
276 default:
277 break;
278 }
279
280 return "unknown";
281 }
282
283 static int parse_events__is_name_term(struct parse_events_term *term)
284 {
285 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
286 }
287
288 static char *get_config_name(struct list_head *head_terms)
289 {
290 struct parse_events_term *term;
291
292 if (!head_terms)
293 return NULL;
294
295 list_for_each_entry(term, head_terms, list)
296 if (parse_events__is_name_term(term))
297 return term->val.str;
298
299 return NULL;
300 }
301
302 static struct perf_evsel *
303 __add_event(struct list_head *list, int *idx,
304 struct perf_event_attr *attr,
305 char *name, struct cpu_map *cpus,
306 struct list_head *config_terms)
307 {
308 struct perf_evsel *evsel;
309
310 event_attr_init(attr);
311
312 evsel = perf_evsel__new_idx(attr, (*idx)++);
313 if (!evsel)
314 return NULL;
315
316 evsel->cpus = cpu_map__get(cpus);
317 evsel->own_cpus = cpu_map__get(cpus);
318
319 if (name)
320 evsel->name = strdup(name);
321
322 if (config_terms)
323 list_splice(config_terms, &evsel->config_terms);
324
325 list_add_tail(&evsel->node, list);
326 return evsel;
327 }
328
329 static int add_event(struct list_head *list, int *idx,
330 struct perf_event_attr *attr, char *name,
331 struct list_head *config_terms)
332 {
333 return __add_event(list, idx, attr, name, NULL, config_terms) ? 0 : -ENOMEM;
334 }
335
336 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
337 {
338 int i, j;
339 int n, longest = -1;
340
341 for (i = 0; i < size; i++) {
342 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
343 n = strlen(names[i][j]);
344 if (n > longest && !strncasecmp(str, names[i][j], n))
345 longest = n;
346 }
347 if (longest > 0)
348 return i;
349 }
350
351 return -1;
352 }
353
354 typedef int config_term_func_t(struct perf_event_attr *attr,
355 struct parse_events_term *term,
356 struct parse_events_error *err);
357 static int config_term_common(struct perf_event_attr *attr,
358 struct parse_events_term *term,
359 struct parse_events_error *err);
360 static int config_attr(struct perf_event_attr *attr,
361 struct list_head *head,
362 struct parse_events_error *err,
363 config_term_func_t config_term);
364
365 int parse_events_add_cache(struct list_head *list, int *idx,
366 char *type, char *op_result1, char *op_result2,
367 struct parse_events_error *err,
368 struct list_head *head_config)
369 {
370 struct perf_event_attr attr;
371 LIST_HEAD(config_terms);
372 char name[MAX_NAME_LEN], *config_name;
373 int cache_type = -1, cache_op = -1, cache_result = -1;
374 char *op_result[2] = { op_result1, op_result2 };
375 int i, n;
376
377 /*
378 * No fallback - if we cannot get a clear cache type
379 * then bail out:
380 */
381 cache_type = parse_aliases(type, perf_evsel__hw_cache,
382 PERF_COUNT_HW_CACHE_MAX);
383 if (cache_type == -1)
384 return -EINVAL;
385
386 config_name = get_config_name(head_config);
387 n = snprintf(name, MAX_NAME_LEN, "%s", type);
388
389 for (i = 0; (i < 2) && (op_result[i]); i++) {
390 char *str = op_result[i];
391
392 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
393
394 if (cache_op == -1) {
395 cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
396 PERF_COUNT_HW_CACHE_OP_MAX);
397 if (cache_op >= 0) {
398 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
399 return -EINVAL;
400 continue;
401 }
402 }
403
404 if (cache_result == -1) {
405 cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
406 PERF_COUNT_HW_CACHE_RESULT_MAX);
407 if (cache_result >= 0)
408 continue;
409 }
410 }
411
412 /*
413 * Fall back to reads:
414 */
415 if (cache_op == -1)
416 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
417
418 /*
419 * Fall back to accesses:
420 */
421 if (cache_result == -1)
422 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
423
424 memset(&attr, 0, sizeof(attr));
425 attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
426 attr.type = PERF_TYPE_HW_CACHE;
427
428 if (head_config) {
429 if (config_attr(&attr, head_config, err,
430 config_term_common))
431 return -EINVAL;
432
433 if (get_config_terms(head_config, &config_terms))
434 return -ENOMEM;
435 }
436 return add_event(list, idx, &attr, config_name ? : name, &config_terms);
437 }
438
439 static void tracepoint_error(struct parse_events_error *e, int err,
440 const char *sys, const char *name)
441 {
442 char help[BUFSIZ];
443
444 if (!e)
445 return;
446
447 /*
448 * We get error directly from syscall errno ( > 0),
449 * or from encoded pointer's error ( < 0).
450 */
451 err = abs(err);
452
453 switch (err) {
454 case EACCES:
455 e->str = strdup("can't access trace events");
456 break;
457 case ENOENT:
458 e->str = strdup("unknown tracepoint");
459 break;
460 default:
461 e->str = strdup("failed to add tracepoint");
462 break;
463 }
464
465 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
466 e->help = strdup(help);
467 }
468
469 static int add_tracepoint(struct list_head *list, int *idx,
470 const char *sys_name, const char *evt_name,
471 struct parse_events_error *err,
472 struct list_head *head_config)
473 {
474 struct perf_evsel *evsel;
475
476 evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
477 if (IS_ERR(evsel)) {
478 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
479 return PTR_ERR(evsel);
480 }
481
482 if (head_config) {
483 LIST_HEAD(config_terms);
484
485 if (get_config_terms(head_config, &config_terms))
486 return -ENOMEM;
487 list_splice(&config_terms, &evsel->config_terms);
488 }
489
490 list_add_tail(&evsel->node, list);
491 return 0;
492 }
493
494 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
495 const char *sys_name, const char *evt_name,
496 struct parse_events_error *err,
497 struct list_head *head_config)
498 {
499 char evt_path[MAXPATHLEN];
500 struct dirent *evt_ent;
501 DIR *evt_dir;
502 int ret = 0, found = 0;
503
504 snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
505 evt_dir = opendir(evt_path);
506 if (!evt_dir) {
507 tracepoint_error(err, errno, sys_name, evt_name);
508 return -1;
509 }
510
511 while (!ret && (evt_ent = readdir(evt_dir))) {
512 if (!strcmp(evt_ent->d_name, ".")
513 || !strcmp(evt_ent->d_name, "..")
514 || !strcmp(evt_ent->d_name, "enable")
515 || !strcmp(evt_ent->d_name, "filter"))
516 continue;
517
518 if (!strglobmatch(evt_ent->d_name, evt_name))
519 continue;
520
521 found++;
522
523 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
524 err, head_config);
525 }
526
527 if (!found) {
528 tracepoint_error(err, ENOENT, sys_name, evt_name);
529 ret = -1;
530 }
531
532 closedir(evt_dir);
533 return ret;
534 }
535
536 static int add_tracepoint_event(struct list_head *list, int *idx,
537 const char *sys_name, const char *evt_name,
538 struct parse_events_error *err,
539 struct list_head *head_config)
540 {
541 return strpbrk(evt_name, "*?") ?
542 add_tracepoint_multi_event(list, idx, sys_name, evt_name,
543 err, head_config) :
544 add_tracepoint(list, idx, sys_name, evt_name,
545 err, head_config);
546 }
547
548 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
549 const char *sys_name, const char *evt_name,
550 struct parse_events_error *err,
551 struct list_head *head_config)
552 {
553 struct dirent *events_ent;
554 DIR *events_dir;
555 int ret = 0;
556
557 events_dir = opendir(tracing_events_path);
558 if (!events_dir) {
559 tracepoint_error(err, errno, sys_name, evt_name);
560 return -1;
561 }
562
563 while (!ret && (events_ent = readdir(events_dir))) {
564 if (!strcmp(events_ent->d_name, ".")
565 || !strcmp(events_ent->d_name, "..")
566 || !strcmp(events_ent->d_name, "enable")
567 || !strcmp(events_ent->d_name, "header_event")
568 || !strcmp(events_ent->d_name, "header_page"))
569 continue;
570
571 if (!strglobmatch(events_ent->d_name, sys_name))
572 continue;
573
574 ret = add_tracepoint_event(list, idx, events_ent->d_name,
575 evt_name, err, head_config);
576 }
577
578 closedir(events_dir);
579 return ret;
580 }
581
582 struct __add_bpf_event_param {
583 struct parse_events_evlist *data;
584 struct list_head *list;
585 struct list_head *head_config;
586 };
587
588 static int add_bpf_event(const char *group, const char *event, int fd,
589 void *_param)
590 {
591 LIST_HEAD(new_evsels);
592 struct __add_bpf_event_param *param = _param;
593 struct parse_events_evlist *evlist = param->data;
594 struct list_head *list = param->list;
595 struct perf_evsel *pos;
596 int err;
597
598 pr_debug("add bpf event %s:%s and attach bpf program %d\n",
599 group, event, fd);
600
601 err = parse_events_add_tracepoint(&new_evsels, &evlist->idx, group,
602 event, evlist->error,
603 param->head_config);
604 if (err) {
605 struct perf_evsel *evsel, *tmp;
606
607 pr_debug("Failed to add BPF event %s:%s\n",
608 group, event);
609 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
610 list_del(&evsel->node);
611 perf_evsel__delete(evsel);
612 }
613 return err;
614 }
615 pr_debug("adding %s:%s\n", group, event);
616
617 list_for_each_entry(pos, &new_evsels, node) {
618 pr_debug("adding %s:%s to %p\n",
619 group, event, pos);
620 pos->bpf_fd = fd;
621 }
622 list_splice(&new_evsels, list);
623 return 0;
624 }
625
626 int parse_events_load_bpf_obj(struct parse_events_evlist *data,
627 struct list_head *list,
628 struct bpf_object *obj,
629 struct list_head *head_config)
630 {
631 int err;
632 char errbuf[BUFSIZ];
633 struct __add_bpf_event_param param = {data, list, head_config};
634 static bool registered_unprobe_atexit = false;
635
636 if (IS_ERR(obj) || !obj) {
637 snprintf(errbuf, sizeof(errbuf),
638 "Internal error: load bpf obj with NULL");
639 err = -EINVAL;
640 goto errout;
641 }
642
643 /*
644 * Register atexit handler before calling bpf__probe() so
645 * bpf__probe() don't need to unprobe probe points its already
646 * created when failure.
647 */
648 if (!registered_unprobe_atexit) {
649 atexit(bpf__clear);
650 registered_unprobe_atexit = true;
651 }
652
653 err = bpf__probe(obj);
654 if (err) {
655 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
656 goto errout;
657 }
658
659 err = bpf__load(obj);
660 if (err) {
661 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
662 goto errout;
663 }
664
665 err = bpf__foreach_event(obj, add_bpf_event, &param);
666 if (err) {
667 snprintf(errbuf, sizeof(errbuf),
668 "Attach events in BPF object failed");
669 goto errout;
670 }
671
672 return 0;
673 errout:
674 data->error->help = strdup("(add -v to see detail)");
675 data->error->str = strdup(errbuf);
676 return err;
677 }
678
679 static int
680 parse_events_config_bpf(struct parse_events_evlist *data,
681 struct bpf_object *obj,
682 struct list_head *head_config)
683 {
684 struct parse_events_term *term;
685 int error_pos;
686
687 if (!head_config || list_empty(head_config))
688 return 0;
689
690 list_for_each_entry(term, head_config, list) {
691 char errbuf[BUFSIZ];
692 int err;
693
694 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
695 snprintf(errbuf, sizeof(errbuf),
696 "Invalid config term for BPF object");
697 errbuf[BUFSIZ - 1] = '\0';
698
699 data->error->idx = term->err_term;
700 data->error->str = strdup(errbuf);
701 return -EINVAL;
702 }
703
704 err = bpf__config_obj(obj, term, data->evlist, &error_pos);
705 if (err) {
706 bpf__strerror_config_obj(obj, term, data->evlist,
707 &error_pos, err, errbuf,
708 sizeof(errbuf));
709 data->error->help = strdup(
710 "Hint:\tValid config terms:\n"
711 " \tmap:[<arraymap>].value<indices>=[value]\n"
712 " \tmap:[<eventmap>].event<indices>=[event]\n"
713 "\n"
714 " \twhere <indices> is something like [0,3...5] or [all]\n"
715 " \t(add -v to see detail)");
716 data->error->str = strdup(errbuf);
717 if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
718 data->error->idx = term->err_val;
719 else
720 data->error->idx = term->err_term + error_pos;
721 return err;
722 }
723 }
724 return 0;
725 }
726
727 /*
728 * Split config terms:
729 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
730 * 'call-graph=fp' is 'evt config', should be applied to each
731 * events in bpf.c.
732 * 'map:array.value[0]=1' is 'obj config', should be processed
733 * with parse_events_config_bpf.
734 *
735 * Move object config terms from the first list to obj_head_config.
736 */
737 static void
738 split_bpf_config_terms(struct list_head *evt_head_config,
739 struct list_head *obj_head_config)
740 {
741 struct parse_events_term *term, *temp;
742
743 /*
744 * Currectly, all possible user config term
745 * belong to bpf object. parse_events__is_hardcoded_term()
746 * happends to be a good flag.
747 *
748 * See parse_events_config_bpf() and
749 * config_term_tracepoint().
750 */
751 list_for_each_entry_safe(term, temp, evt_head_config, list)
752 if (!parse_events__is_hardcoded_term(term))
753 list_move_tail(&term->list, obj_head_config);
754 }
755
756 int parse_events_load_bpf(struct parse_events_evlist *data,
757 struct list_head *list,
758 char *bpf_file_name,
759 bool source,
760 struct list_head *head_config)
761 {
762 int err;
763 struct bpf_object *obj;
764 LIST_HEAD(obj_head_config);
765
766 if (head_config)
767 split_bpf_config_terms(head_config, &obj_head_config);
768
769 obj = bpf__prepare_load(bpf_file_name, source);
770 if (IS_ERR(obj)) {
771 char errbuf[BUFSIZ];
772
773 err = PTR_ERR(obj);
774
775 if (err == -ENOTSUP)
776 snprintf(errbuf, sizeof(errbuf),
777 "BPF support is not compiled");
778 else
779 bpf__strerror_prepare_load(bpf_file_name,
780 source,
781 -err, errbuf,
782 sizeof(errbuf));
783
784 data->error->help = strdup("(add -v to see detail)");
785 data->error->str = strdup(errbuf);
786 return err;
787 }
788
789 err = parse_events_load_bpf_obj(data, list, obj, head_config);
790 if (err)
791 return err;
792 err = parse_events_config_bpf(data, obj, &obj_head_config);
793
794 /*
795 * Caller doesn't know anything about obj_head_config,
796 * so combine them together again before returnning.
797 */
798 if (head_config)
799 list_splice_tail(&obj_head_config, head_config);
800 return err;
801 }
802
803 static int
804 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
805 {
806 int i;
807
808 for (i = 0; i < 3; i++) {
809 if (!type || !type[i])
810 break;
811
812 #define CHECK_SET_TYPE(bit) \
813 do { \
814 if (attr->bp_type & bit) \
815 return -EINVAL; \
816 else \
817 attr->bp_type |= bit; \
818 } while (0)
819
820 switch (type[i]) {
821 case 'r':
822 CHECK_SET_TYPE(HW_BREAKPOINT_R);
823 break;
824 case 'w':
825 CHECK_SET_TYPE(HW_BREAKPOINT_W);
826 break;
827 case 'x':
828 CHECK_SET_TYPE(HW_BREAKPOINT_X);
829 break;
830 default:
831 return -EINVAL;
832 }
833 }
834
835 #undef CHECK_SET_TYPE
836
837 if (!attr->bp_type) /* Default */
838 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
839
840 return 0;
841 }
842
843 int parse_events_add_breakpoint(struct list_head *list, int *idx,
844 void *ptr, char *type, u64 len)
845 {
846 struct perf_event_attr attr;
847
848 memset(&attr, 0, sizeof(attr));
849 attr.bp_addr = (unsigned long) ptr;
850
851 if (parse_breakpoint_type(type, &attr))
852 return -EINVAL;
853
854 /* Provide some defaults if len is not specified */
855 if (!len) {
856 if (attr.bp_type == HW_BREAKPOINT_X)
857 len = sizeof(long);
858 else
859 len = HW_BREAKPOINT_LEN_4;
860 }
861
862 attr.bp_len = len;
863
864 attr.type = PERF_TYPE_BREAKPOINT;
865 attr.sample_period = 1;
866
867 return add_event(list, idx, &attr, NULL, NULL);
868 }
869
870 static int check_type_val(struct parse_events_term *term,
871 struct parse_events_error *err,
872 int type)
873 {
874 if (type == term->type_val)
875 return 0;
876
877 if (err) {
878 err->idx = term->err_val;
879 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
880 err->str = strdup("expected numeric value");
881 else
882 err->str = strdup("expected string value");
883 }
884 return -EINVAL;
885 }
886
887 /*
888 * Update according to parse-events.l
889 */
890 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
891 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>",
892 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config",
893 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1",
894 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2",
895 [PARSE_EVENTS__TERM_TYPE_NAME] = "name",
896 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period",
897 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq",
898 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type",
899 [PARSE_EVENTS__TERM_TYPE_TIME] = "time",
900 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph",
901 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size",
902 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit",
903 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit",
904 [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack",
905 [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite",
906 [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite",
907 };
908
909 static bool config_term_shrinked;
910
911 static bool
912 config_term_avail(int term_type, struct parse_events_error *err)
913 {
914 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
915 err->str = strdup("Invalid term_type");
916 return false;
917 }
918 if (!config_term_shrinked)
919 return true;
920
921 switch (term_type) {
922 case PARSE_EVENTS__TERM_TYPE_CONFIG:
923 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
924 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
925 case PARSE_EVENTS__TERM_TYPE_NAME:
926 return true;
927 default:
928 if (!err)
929 return false;
930
931 /* term_type is validated so indexing is safe */
932 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
933 config_term_names[term_type]) < 0)
934 err->str = NULL;
935 return false;
936 }
937 }
938
939 void parse_events__shrink_config_terms(void)
940 {
941 config_term_shrinked = true;
942 }
943
944 static int config_term_common(struct perf_event_attr *attr,
945 struct parse_events_term *term,
946 struct parse_events_error *err)
947 {
948 #define CHECK_TYPE_VAL(type) \
949 do { \
950 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
951 return -EINVAL; \
952 } while (0)
953
954 switch (term->type_term) {
955 case PARSE_EVENTS__TERM_TYPE_CONFIG:
956 CHECK_TYPE_VAL(NUM);
957 attr->config = term->val.num;
958 break;
959 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
960 CHECK_TYPE_VAL(NUM);
961 attr->config1 = term->val.num;
962 break;
963 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
964 CHECK_TYPE_VAL(NUM);
965 attr->config2 = term->val.num;
966 break;
967 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
968 CHECK_TYPE_VAL(NUM);
969 break;
970 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
971 CHECK_TYPE_VAL(NUM);
972 break;
973 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
974 /*
975 * TODO uncomment when the field is available
976 * attr->branch_sample_type = term->val.num;
977 */
978 break;
979 case PARSE_EVENTS__TERM_TYPE_TIME:
980 CHECK_TYPE_VAL(NUM);
981 if (term->val.num > 1) {
982 err->str = strdup("expected 0 or 1");
983 err->idx = term->err_val;
984 return -EINVAL;
985 }
986 break;
987 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
988 CHECK_TYPE_VAL(STR);
989 break;
990 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
991 CHECK_TYPE_VAL(NUM);
992 break;
993 case PARSE_EVENTS__TERM_TYPE_INHERIT:
994 CHECK_TYPE_VAL(NUM);
995 break;
996 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
997 CHECK_TYPE_VAL(NUM);
998 break;
999 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1000 CHECK_TYPE_VAL(NUM);
1001 break;
1002 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1003 CHECK_TYPE_VAL(NUM);
1004 break;
1005 case PARSE_EVENTS__TERM_TYPE_NAME:
1006 CHECK_TYPE_VAL(STR);
1007 break;
1008 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1009 CHECK_TYPE_VAL(NUM);
1010 break;
1011 default:
1012 err->str = strdup("unknown term");
1013 err->idx = term->err_term;
1014 err->help = parse_events_formats_error_string(NULL);
1015 return -EINVAL;
1016 }
1017
1018 /*
1019 * Check term availbility after basic checking so
1020 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1021 *
1022 * If check availbility at the entry of this function,
1023 * user will see "'<sysfs term>' is not usable in 'perf stat'"
1024 * if an invalid config term is provided for legacy events
1025 * (for example, instructions/badterm/...), which is confusing.
1026 */
1027 if (!config_term_avail(term->type_term, err))
1028 return -EINVAL;
1029 return 0;
1030 #undef CHECK_TYPE_VAL
1031 }
1032
1033 static int config_term_pmu(struct perf_event_attr *attr,
1034 struct parse_events_term *term,
1035 struct parse_events_error *err)
1036 {
1037 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER)
1038 /*
1039 * Always succeed for sysfs terms, as we dont know
1040 * at this point what type they need to have.
1041 */
1042 return 0;
1043 else
1044 return config_term_common(attr, term, err);
1045 }
1046
1047 static int config_term_tracepoint(struct perf_event_attr *attr,
1048 struct parse_events_term *term,
1049 struct parse_events_error *err)
1050 {
1051 switch (term->type_term) {
1052 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1053 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1054 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1055 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1056 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1057 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1058 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1059 return config_term_common(attr, term, err);
1060 default:
1061 if (err) {
1062 err->idx = term->err_term;
1063 err->str = strdup("unknown term");
1064 err->help = strdup("valid terms: call-graph,stack-size\n");
1065 }
1066 return -EINVAL;
1067 }
1068
1069 return 0;
1070 }
1071
1072 static int config_attr(struct perf_event_attr *attr,
1073 struct list_head *head,
1074 struct parse_events_error *err,
1075 config_term_func_t config_term)
1076 {
1077 struct parse_events_term *term;
1078
1079 list_for_each_entry(term, head, list)
1080 if (config_term(attr, term, err))
1081 return -EINVAL;
1082
1083 return 0;
1084 }
1085
1086 static int get_config_terms(struct list_head *head_config,
1087 struct list_head *head_terms __maybe_unused)
1088 {
1089 #define ADD_CONFIG_TERM(__type, __name, __val) \
1090 do { \
1091 struct perf_evsel_config_term *__t; \
1092 \
1093 __t = zalloc(sizeof(*__t)); \
1094 if (!__t) \
1095 return -ENOMEM; \
1096 \
1097 INIT_LIST_HEAD(&__t->list); \
1098 __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
1099 __t->val.__name = __val; \
1100 list_add_tail(&__t->list, head_terms); \
1101 } while (0)
1102
1103 struct parse_events_term *term;
1104
1105 list_for_each_entry(term, head_config, list) {
1106 switch (term->type_term) {
1107 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1108 ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1109 break;
1110 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1111 ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1112 break;
1113 case PARSE_EVENTS__TERM_TYPE_TIME:
1114 ADD_CONFIG_TERM(TIME, time, term->val.num);
1115 break;
1116 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1117 ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1118 break;
1119 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1120 ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1121 break;
1122 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1123 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1124 break;
1125 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1126 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1127 break;
1128 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1129 ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1130 break;
1131 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1132 ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1133 break;
1134 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1135 ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1136 break;
1137 default:
1138 break;
1139 }
1140 }
1141 #undef ADD_EVSEL_CONFIG
1142 return 0;
1143 }
1144
1145 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1146 const char *sys, const char *event,
1147 struct parse_events_error *err,
1148 struct list_head *head_config)
1149 {
1150 if (head_config) {
1151 struct perf_event_attr attr;
1152
1153 if (config_attr(&attr, head_config, err,
1154 config_term_tracepoint))
1155 return -EINVAL;
1156 }
1157
1158 if (strpbrk(sys, "*?"))
1159 return add_tracepoint_multi_sys(list, idx, sys, event,
1160 err, head_config);
1161 else
1162 return add_tracepoint_event(list, idx, sys, event,
1163 err, head_config);
1164 }
1165
1166 int parse_events_add_numeric(struct parse_events_evlist *data,
1167 struct list_head *list,
1168 u32 type, u64 config,
1169 struct list_head *head_config)
1170 {
1171 struct perf_event_attr attr;
1172 LIST_HEAD(config_terms);
1173
1174 memset(&attr, 0, sizeof(attr));
1175 attr.type = type;
1176 attr.config = config;
1177
1178 if (head_config) {
1179 if (config_attr(&attr, head_config, data->error,
1180 config_term_common))
1181 return -EINVAL;
1182
1183 if (get_config_terms(head_config, &config_terms))
1184 return -ENOMEM;
1185 }
1186
1187 return add_event(list, &data->idx, &attr,
1188 get_config_name(head_config), &config_terms);
1189 }
1190
1191 int parse_events_add_pmu(struct parse_events_evlist *data,
1192 struct list_head *list, char *name,
1193 struct list_head *head_config)
1194 {
1195 struct perf_event_attr attr;
1196 struct perf_pmu_info info;
1197 struct perf_pmu *pmu;
1198 struct perf_evsel *evsel;
1199 LIST_HEAD(config_terms);
1200
1201 pmu = perf_pmu__find(name);
1202 if (!pmu)
1203 return -EINVAL;
1204
1205 if (pmu->default_config) {
1206 memcpy(&attr, pmu->default_config,
1207 sizeof(struct perf_event_attr));
1208 } else {
1209 memset(&attr, 0, sizeof(attr));
1210 }
1211
1212 if (!head_config) {
1213 attr.type = pmu->type;
1214 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
1215 return evsel ? 0 : -ENOMEM;
1216 }
1217
1218 if (perf_pmu__check_alias(pmu, head_config, &info))
1219 return -EINVAL;
1220
1221 /*
1222 * Configure hardcoded terms first, no need to check
1223 * return value when called with fail == 0 ;)
1224 */
1225 if (config_attr(&attr, head_config, data->error, config_term_pmu))
1226 return -EINVAL;
1227
1228 if (get_config_terms(head_config, &config_terms))
1229 return -ENOMEM;
1230
1231 if (perf_pmu__config(pmu, &attr, head_config, data->error))
1232 return -EINVAL;
1233
1234 evsel = __add_event(list, &data->idx, &attr,
1235 get_config_name(head_config), pmu->cpus,
1236 &config_terms);
1237 if (evsel) {
1238 evsel->unit = info.unit;
1239 evsel->scale = info.scale;
1240 evsel->per_pkg = info.per_pkg;
1241 evsel->snapshot = info.snapshot;
1242 }
1243
1244 return evsel ? 0 : -ENOMEM;
1245 }
1246
1247 int parse_events__modifier_group(struct list_head *list,
1248 char *event_mod)
1249 {
1250 return parse_events__modifier_event(list, event_mod, true);
1251 }
1252
1253 void parse_events__set_leader(char *name, struct list_head *list)
1254 {
1255 struct perf_evsel *leader;
1256
1257 if (list_empty(list)) {
1258 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1259 return;
1260 }
1261
1262 __perf_evlist__set_leader(list);
1263 leader = list_entry(list->next, struct perf_evsel, node);
1264 leader->group_name = name ? strdup(name) : NULL;
1265 }
1266
1267 /* list_event is assumed to point to malloc'ed memory */
1268 void parse_events_update_lists(struct list_head *list_event,
1269 struct list_head *list_all)
1270 {
1271 /*
1272 * Called for single event definition. Update the
1273 * 'all event' list, and reinit the 'single event'
1274 * list, for next event definition.
1275 */
1276 list_splice_tail(list_event, list_all);
1277 free(list_event);
1278 }
1279
1280 struct event_modifier {
1281 int eu;
1282 int ek;
1283 int eh;
1284 int eH;
1285 int eG;
1286 int eI;
1287 int precise;
1288 int precise_max;
1289 int exclude_GH;
1290 int sample_read;
1291 int pinned;
1292 };
1293
1294 static int get_event_modifier(struct event_modifier *mod, char *str,
1295 struct perf_evsel *evsel)
1296 {
1297 int eu = evsel ? evsel->attr.exclude_user : 0;
1298 int ek = evsel ? evsel->attr.exclude_kernel : 0;
1299 int eh = evsel ? evsel->attr.exclude_hv : 0;
1300 int eH = evsel ? evsel->attr.exclude_host : 0;
1301 int eG = evsel ? evsel->attr.exclude_guest : 0;
1302 int eI = evsel ? evsel->attr.exclude_idle : 0;
1303 int precise = evsel ? evsel->attr.precise_ip : 0;
1304 int precise_max = 0;
1305 int sample_read = 0;
1306 int pinned = evsel ? evsel->attr.pinned : 0;
1307
1308 int exclude = eu | ek | eh;
1309 int exclude_GH = evsel ? evsel->exclude_GH : 0;
1310
1311 memset(mod, 0, sizeof(*mod));
1312
1313 while (*str) {
1314 if (*str == 'u') {
1315 if (!exclude)
1316 exclude = eu = ek = eh = 1;
1317 eu = 0;
1318 } else if (*str == 'k') {
1319 if (!exclude)
1320 exclude = eu = ek = eh = 1;
1321 ek = 0;
1322 } else if (*str == 'h') {
1323 if (!exclude)
1324 exclude = eu = ek = eh = 1;
1325 eh = 0;
1326 } else if (*str == 'G') {
1327 if (!exclude_GH)
1328 exclude_GH = eG = eH = 1;
1329 eG = 0;
1330 } else if (*str == 'H') {
1331 if (!exclude_GH)
1332 exclude_GH = eG = eH = 1;
1333 eH = 0;
1334 } else if (*str == 'I') {
1335 eI = 1;
1336 } else if (*str == 'p') {
1337 precise++;
1338 /* use of precise requires exclude_guest */
1339 if (!exclude_GH)
1340 eG = 1;
1341 } else if (*str == 'P') {
1342 precise_max = 1;
1343 } else if (*str == 'S') {
1344 sample_read = 1;
1345 } else if (*str == 'D') {
1346 pinned = 1;
1347 } else
1348 break;
1349
1350 ++str;
1351 }
1352
1353 /*
1354 * precise ip:
1355 *
1356 * 0 - SAMPLE_IP can have arbitrary skid
1357 * 1 - SAMPLE_IP must have constant skid
1358 * 2 - SAMPLE_IP requested to have 0 skid
1359 * 3 - SAMPLE_IP must have 0 skid
1360 *
1361 * See also PERF_RECORD_MISC_EXACT_IP
1362 */
1363 if (precise > 3)
1364 return -EINVAL;
1365
1366 mod->eu = eu;
1367 mod->ek = ek;
1368 mod->eh = eh;
1369 mod->eH = eH;
1370 mod->eG = eG;
1371 mod->eI = eI;
1372 mod->precise = precise;
1373 mod->precise_max = precise_max;
1374 mod->exclude_GH = exclude_GH;
1375 mod->sample_read = sample_read;
1376 mod->pinned = pinned;
1377
1378 return 0;
1379 }
1380
1381 /*
1382 * Basic modifier sanity check to validate it contains only one
1383 * instance of any modifier (apart from 'p') present.
1384 */
1385 static int check_modifier(char *str)
1386 {
1387 char *p = str;
1388
1389 /* The sizeof includes 0 byte as well. */
1390 if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1391 return -1;
1392
1393 while (*p) {
1394 if (*p != 'p' && strchr(p + 1, *p))
1395 return -1;
1396 p++;
1397 }
1398
1399 return 0;
1400 }
1401
1402 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1403 {
1404 struct perf_evsel *evsel;
1405 struct event_modifier mod;
1406
1407 if (str == NULL)
1408 return 0;
1409
1410 if (check_modifier(str))
1411 return -EINVAL;
1412
1413 if (!add && get_event_modifier(&mod, str, NULL))
1414 return -EINVAL;
1415
1416 __evlist__for_each_entry(list, evsel) {
1417 if (add && get_event_modifier(&mod, str, evsel))
1418 return -EINVAL;
1419
1420 evsel->attr.exclude_user = mod.eu;
1421 evsel->attr.exclude_kernel = mod.ek;
1422 evsel->attr.exclude_hv = mod.eh;
1423 evsel->attr.precise_ip = mod.precise;
1424 evsel->attr.exclude_host = mod.eH;
1425 evsel->attr.exclude_guest = mod.eG;
1426 evsel->attr.exclude_idle = mod.eI;
1427 evsel->exclude_GH = mod.exclude_GH;
1428 evsel->sample_read = mod.sample_read;
1429 evsel->precise_max = mod.precise_max;
1430
1431 if (perf_evsel__is_group_leader(evsel))
1432 evsel->attr.pinned = mod.pinned;
1433 }
1434
1435 return 0;
1436 }
1437
1438 int parse_events_name(struct list_head *list, char *name)
1439 {
1440 struct perf_evsel *evsel;
1441
1442 __evlist__for_each_entry(list, evsel) {
1443 if (!evsel->name)
1444 evsel->name = strdup(name);
1445 }
1446
1447 return 0;
1448 }
1449
1450 static int
1451 comp_pmu(const void *p1, const void *p2)
1452 {
1453 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1454 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1455
1456 return strcmp(pmu1->symbol, pmu2->symbol);
1457 }
1458
1459 static void perf_pmu__parse_cleanup(void)
1460 {
1461 if (perf_pmu_events_list_num > 0) {
1462 struct perf_pmu_event_symbol *p;
1463 int i;
1464
1465 for (i = 0; i < perf_pmu_events_list_num; i++) {
1466 p = perf_pmu_events_list + i;
1467 free(p->symbol);
1468 }
1469 free(perf_pmu_events_list);
1470 perf_pmu_events_list = NULL;
1471 perf_pmu_events_list_num = 0;
1472 }
1473 }
1474
1475 #define SET_SYMBOL(str, stype) \
1476 do { \
1477 p->symbol = str; \
1478 if (!p->symbol) \
1479 goto err; \
1480 p->type = stype; \
1481 } while (0)
1482
1483 /*
1484 * Read the pmu events list from sysfs
1485 * Save it into perf_pmu_events_list
1486 */
1487 static void perf_pmu__parse_init(void)
1488 {
1489
1490 struct perf_pmu *pmu = NULL;
1491 struct perf_pmu_alias *alias;
1492 int len = 0;
1493
1494 pmu = perf_pmu__find("cpu");
1495 if ((pmu == NULL) || list_empty(&pmu->aliases)) {
1496 perf_pmu_events_list_num = -1;
1497 return;
1498 }
1499 list_for_each_entry(alias, &pmu->aliases, list) {
1500 if (strchr(alias->name, '-'))
1501 len++;
1502 len++;
1503 }
1504 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1505 if (!perf_pmu_events_list)
1506 return;
1507 perf_pmu_events_list_num = len;
1508
1509 len = 0;
1510 list_for_each_entry(alias, &pmu->aliases, list) {
1511 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1512 char *tmp = strchr(alias->name, '-');
1513
1514 if (tmp != NULL) {
1515 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1516 PMU_EVENT_SYMBOL_PREFIX);
1517 p++;
1518 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1519 len += 2;
1520 } else {
1521 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1522 len++;
1523 }
1524 }
1525 qsort(perf_pmu_events_list, len,
1526 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1527
1528 return;
1529 err:
1530 perf_pmu__parse_cleanup();
1531 }
1532
1533 enum perf_pmu_event_symbol_type
1534 perf_pmu__parse_check(const char *name)
1535 {
1536 struct perf_pmu_event_symbol p, *r;
1537
1538 /* scan kernel pmu events from sysfs if needed */
1539 if (perf_pmu_events_list_num == 0)
1540 perf_pmu__parse_init();
1541 /*
1542 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1543 * cpu-cycles has been handled by hardcode.
1544 * So it must be cpu// events, not kernel pmu event.
1545 */
1546 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1547 return PMU_EVENT_SYMBOL_ERR;
1548
1549 p.symbol = strdup(name);
1550 r = bsearch(&p, perf_pmu_events_list,
1551 (size_t) perf_pmu_events_list_num,
1552 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1553 free(p.symbol);
1554 return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1555 }
1556
1557 static int parse_events__scanner(const char *str, void *data, int start_token)
1558 {
1559 YY_BUFFER_STATE buffer;
1560 void *scanner;
1561 int ret;
1562
1563 ret = parse_events_lex_init_extra(start_token, &scanner);
1564 if (ret)
1565 return ret;
1566
1567 buffer = parse_events__scan_string(str, scanner);
1568
1569 #ifdef PARSER_DEBUG
1570 parse_events_debug = 1;
1571 #endif
1572 ret = parse_events_parse(data, scanner);
1573
1574 parse_events__flush_buffer(buffer, scanner);
1575 parse_events__delete_buffer(buffer, scanner);
1576 parse_events_lex_destroy(scanner);
1577 return ret;
1578 }
1579
1580 /*
1581 * parse event config string, return a list of event terms.
1582 */
1583 int parse_events_terms(struct list_head *terms, const char *str)
1584 {
1585 struct parse_events_terms data = {
1586 .terms = NULL,
1587 };
1588 int ret;
1589
1590 ret = parse_events__scanner(str, &data, PE_START_TERMS);
1591 if (!ret) {
1592 list_splice(data.terms, terms);
1593 zfree(&data.terms);
1594 return 0;
1595 }
1596
1597 parse_events_terms__delete(data.terms);
1598 return ret;
1599 }
1600
1601 int parse_events(struct perf_evlist *evlist, const char *str,
1602 struct parse_events_error *err)
1603 {
1604 struct parse_events_evlist data = {
1605 .list = LIST_HEAD_INIT(data.list),
1606 .idx = evlist->nr_entries,
1607 .error = err,
1608 .evlist = evlist,
1609 };
1610 int ret;
1611
1612 ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1613 perf_pmu__parse_cleanup();
1614 if (!ret) {
1615 struct perf_evsel *last;
1616
1617 if (list_empty(&data.list)) {
1618 WARN_ONCE(true, "WARNING: event parser found nothing");
1619 return -1;
1620 }
1621
1622 perf_evlist__splice_list_tail(evlist, &data.list);
1623 evlist->nr_groups += data.nr_groups;
1624 last = perf_evlist__last(evlist);
1625 last->cmdline_group_boundary = true;
1626
1627 return 0;
1628 }
1629
1630 /*
1631 * There are 2 users - builtin-record and builtin-test objects.
1632 * Both call perf_evlist__delete in case of error, so we dont
1633 * need to bother.
1634 */
1635 return ret;
1636 }
1637
1638 #define MAX_WIDTH 1000
1639 static int get_term_width(void)
1640 {
1641 struct winsize ws;
1642
1643 get_term_dimensions(&ws);
1644 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1645 }
1646
1647 static void parse_events_print_error(struct parse_events_error *err,
1648 const char *event)
1649 {
1650 const char *str = "invalid or unsupported event: ";
1651 char _buf[MAX_WIDTH];
1652 char *buf = (char *) event;
1653 int idx = 0;
1654
1655 if (err->str) {
1656 /* -2 for extra '' in the final fprintf */
1657 int width = get_term_width() - 2;
1658 int len_event = strlen(event);
1659 int len_str, max_len, cut = 0;
1660
1661 /*
1662 * Maximum error index indent, we will cut
1663 * the event string if it's bigger.
1664 */
1665 int max_err_idx = 13;
1666
1667 /*
1668 * Let's be specific with the message when
1669 * we have the precise error.
1670 */
1671 str = "event syntax error: ";
1672 len_str = strlen(str);
1673 max_len = width - len_str;
1674
1675 buf = _buf;
1676
1677 /* We're cutting from the beginning. */
1678 if (err->idx > max_err_idx)
1679 cut = err->idx - max_err_idx;
1680
1681 strncpy(buf, event + cut, max_len);
1682
1683 /* Mark cut parts with '..' on both sides. */
1684 if (cut)
1685 buf[0] = buf[1] = '.';
1686
1687 if ((len_event - cut) > max_len) {
1688 buf[max_len - 1] = buf[max_len - 2] = '.';
1689 buf[max_len] = 0;
1690 }
1691
1692 idx = len_str + err->idx - cut;
1693 }
1694
1695 fprintf(stderr, "%s'%s'\n", str, buf);
1696 if (idx) {
1697 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1698 if (err->help)
1699 fprintf(stderr, "\n%s\n", err->help);
1700 free(err->str);
1701 free(err->help);
1702 }
1703
1704 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1705 }
1706
1707 #undef MAX_WIDTH
1708
1709 int parse_events_option(const struct option *opt, const char *str,
1710 int unset __maybe_unused)
1711 {
1712 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1713 struct parse_events_error err = { .idx = 0, };
1714 int ret = parse_events(evlist, str, &err);
1715
1716 if (ret)
1717 parse_events_print_error(&err, str);
1718
1719 return ret;
1720 }
1721
1722 static int
1723 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1724 int (*func)(struct perf_evsel *evsel,
1725 const void *arg),
1726 const void *arg)
1727 {
1728 struct perf_evsel *last = NULL;
1729 int err;
1730
1731 /*
1732 * Don't return when list_empty, give func a chance to report
1733 * error when it found last == NULL.
1734 *
1735 * So no need to WARN here, let *func do this.
1736 */
1737 if (evlist->nr_entries > 0)
1738 last = perf_evlist__last(evlist);
1739
1740 do {
1741 err = (*func)(last, arg);
1742 if (err)
1743 return -1;
1744 if (!last)
1745 return 0;
1746
1747 if (last->node.prev == &evlist->entries)
1748 return 0;
1749 last = list_entry(last->node.prev, struct perf_evsel, node);
1750 } while (!last->cmdline_group_boundary);
1751
1752 return 0;
1753 }
1754
1755 static int set_filter(struct perf_evsel *evsel, const void *arg)
1756 {
1757 const char *str = arg;
1758
1759 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1760 fprintf(stderr,
1761 "--filter option should follow a -e tracepoint option\n");
1762 return -1;
1763 }
1764
1765 if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
1766 fprintf(stderr,
1767 "not enough memory to hold filter string\n");
1768 return -1;
1769 }
1770
1771 return 0;
1772 }
1773
1774 int parse_filter(const struct option *opt, const char *str,
1775 int unset __maybe_unused)
1776 {
1777 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1778
1779 return foreach_evsel_in_last_glob(evlist, set_filter,
1780 (const void *)str);
1781 }
1782
1783 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1784 const void *arg __maybe_unused)
1785 {
1786 char new_filter[64];
1787
1788 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1789 fprintf(stderr,
1790 "--exclude-perf option should follow a -e tracepoint option\n");
1791 return -1;
1792 }
1793
1794 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1795
1796 if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
1797 fprintf(stderr,
1798 "not enough memory to hold filter string\n");
1799 return -1;
1800 }
1801
1802 return 0;
1803 }
1804
1805 int exclude_perf(const struct option *opt,
1806 const char *arg __maybe_unused,
1807 int unset __maybe_unused)
1808 {
1809 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1810
1811 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1812 NULL);
1813 }
1814
1815 static const char * const event_type_descriptors[] = {
1816 "Hardware event",
1817 "Software event",
1818 "Tracepoint event",
1819 "Hardware cache event",
1820 "Raw hardware event descriptor",
1821 "Hardware breakpoint",
1822 };
1823
1824 static int cmp_string(const void *a, const void *b)
1825 {
1826 const char * const *as = a;
1827 const char * const *bs = b;
1828
1829 return strcmp(*as, *bs);
1830 }
1831
1832 /*
1833 * Print the events from <debugfs_mount_point>/tracing/events
1834 */
1835
1836 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1837 bool name_only)
1838 {
1839 DIR *sys_dir, *evt_dir;
1840 struct dirent *sys_dirent, *evt_dirent;
1841 char evt_path[MAXPATHLEN];
1842 char dir_path[MAXPATHLEN];
1843 char **evt_list = NULL;
1844 unsigned int evt_i = 0, evt_num = 0;
1845 bool evt_num_known = false;
1846
1847 restart:
1848 sys_dir = opendir(tracing_events_path);
1849 if (!sys_dir)
1850 return;
1851
1852 if (evt_num_known) {
1853 evt_list = zalloc(sizeof(char *) * evt_num);
1854 if (!evt_list)
1855 goto out_close_sys_dir;
1856 }
1857
1858 for_each_subsystem(sys_dir, sys_dirent) {
1859 if (subsys_glob != NULL &&
1860 !strglobmatch(sys_dirent->d_name, subsys_glob))
1861 continue;
1862
1863 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1864 sys_dirent->d_name);
1865 evt_dir = opendir(dir_path);
1866 if (!evt_dir)
1867 continue;
1868
1869 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1870 if (event_glob != NULL &&
1871 !strglobmatch(evt_dirent->d_name, event_glob))
1872 continue;
1873
1874 if (!evt_num_known) {
1875 evt_num++;
1876 continue;
1877 }
1878
1879 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1880 sys_dirent->d_name, evt_dirent->d_name);
1881
1882 evt_list[evt_i] = strdup(evt_path);
1883 if (evt_list[evt_i] == NULL)
1884 goto out_close_evt_dir;
1885 evt_i++;
1886 }
1887 closedir(evt_dir);
1888 }
1889 closedir(sys_dir);
1890
1891 if (!evt_num_known) {
1892 evt_num_known = true;
1893 goto restart;
1894 }
1895 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1896 evt_i = 0;
1897 while (evt_i < evt_num) {
1898 if (name_only) {
1899 printf("%s ", evt_list[evt_i++]);
1900 continue;
1901 }
1902 printf(" %-50s [%s]\n", evt_list[evt_i++],
1903 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1904 }
1905 if (evt_num && pager_in_use())
1906 printf("\n");
1907
1908 out_free:
1909 evt_num = evt_i;
1910 for (evt_i = 0; evt_i < evt_num; evt_i++)
1911 zfree(&evt_list[evt_i]);
1912 zfree(&evt_list);
1913 return;
1914
1915 out_close_evt_dir:
1916 closedir(evt_dir);
1917 out_close_sys_dir:
1918 closedir(sys_dir);
1919
1920 printf("FATAL: not enough memory to print %s\n",
1921 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1922 if (evt_list)
1923 goto out_free;
1924 }
1925
1926 /*
1927 * Check whether event is in <debugfs_mount_point>/tracing/events
1928 */
1929
1930 int is_valid_tracepoint(const char *event_string)
1931 {
1932 DIR *sys_dir, *evt_dir;
1933 struct dirent *sys_dirent, *evt_dirent;
1934 char evt_path[MAXPATHLEN];
1935 char dir_path[MAXPATHLEN];
1936
1937 sys_dir = opendir(tracing_events_path);
1938 if (!sys_dir)
1939 return 0;
1940
1941 for_each_subsystem(sys_dir, sys_dirent) {
1942
1943 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1944 sys_dirent->d_name);
1945 evt_dir = opendir(dir_path);
1946 if (!evt_dir)
1947 continue;
1948
1949 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1950 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1951 sys_dirent->d_name, evt_dirent->d_name);
1952 if (!strcmp(evt_path, event_string)) {
1953 closedir(evt_dir);
1954 closedir(sys_dir);
1955 return 1;
1956 }
1957 }
1958 closedir(evt_dir);
1959 }
1960 closedir(sys_dir);
1961 return 0;
1962 }
1963
1964 static bool is_event_supported(u8 type, unsigned config)
1965 {
1966 bool ret = true;
1967 int open_return;
1968 struct perf_evsel *evsel;
1969 struct perf_event_attr attr = {
1970 .type = type,
1971 .config = config,
1972 .disabled = 1,
1973 };
1974 struct {
1975 struct thread_map map;
1976 int threads[1];
1977 } tmap = {
1978 .map.nr = 1,
1979 .threads = { 0 },
1980 };
1981
1982 evsel = perf_evsel__new(&attr);
1983 if (evsel) {
1984 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1985 ret = open_return >= 0;
1986
1987 if (open_return == -EACCES) {
1988 /*
1989 * This happens if the paranoid value
1990 * /proc/sys/kernel/perf_event_paranoid is set to 2
1991 * Re-run with exclude_kernel set; we don't do that
1992 * by default as some ARM machines do not support it.
1993 *
1994 */
1995 evsel->attr.exclude_kernel = 1;
1996 ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1997 }
1998 perf_evsel__delete(evsel);
1999 }
2000
2001 return ret;
2002 }
2003
2004 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2005 bool name_only)
2006 {
2007 struct probe_cache *pcache;
2008 struct probe_cache_entry *ent;
2009 struct strlist *bidlist, *sdtlist;
2010 struct strlist_config cfg = {.dont_dupstr = true};
2011 struct str_node *nd, *nd2;
2012 char *buf, *path, *ptr = NULL;
2013 bool show_detail = false;
2014 int ret;
2015
2016 sdtlist = strlist__new(NULL, &cfg);
2017 if (!sdtlist) {
2018 pr_debug("Failed to allocate new strlist for SDT\n");
2019 return;
2020 }
2021 bidlist = build_id_cache__list_all(true);
2022 if (!bidlist) {
2023 pr_debug("Failed to get buildids: %d\n", errno);
2024 return;
2025 }
2026 strlist__for_each_entry(nd, bidlist) {
2027 pcache = probe_cache__new(nd->s);
2028 if (!pcache)
2029 continue;
2030 list_for_each_entry(ent, &pcache->entries, node) {
2031 if (!ent->sdt)
2032 continue;
2033 if (subsys_glob &&
2034 !strglobmatch(ent->pev.group, subsys_glob))
2035 continue;
2036 if (event_glob &&
2037 !strglobmatch(ent->pev.event, event_glob))
2038 continue;
2039 ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2040 ent->pev.event, nd->s);
2041 if (ret > 0)
2042 strlist__add(sdtlist, buf);
2043 }
2044 probe_cache__delete(pcache);
2045 }
2046 strlist__delete(bidlist);
2047
2048 strlist__for_each_entry(nd, sdtlist) {
2049 buf = strchr(nd->s, '@');
2050 if (buf)
2051 *(buf++) = '\0';
2052 if (name_only) {
2053 printf("%s ", nd->s);
2054 continue;
2055 }
2056 nd2 = strlist__next(nd);
2057 if (nd2) {
2058 ptr = strchr(nd2->s, '@');
2059 if (ptr)
2060 *ptr = '\0';
2061 if (strcmp(nd->s, nd2->s) == 0)
2062 show_detail = true;
2063 }
2064 if (show_detail) {
2065 path = build_id_cache__origname(buf);
2066 ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2067 if (ret > 0) {
2068 printf(" %-50s [%s]\n", buf, "SDT event");
2069 free(buf);
2070 }
2071 } else
2072 printf(" %-50s [%s]\n", nd->s, "SDT event");
2073 if (nd2) {
2074 if (strcmp(nd->s, nd2->s) != 0)
2075 show_detail = false;
2076 if (ptr)
2077 *ptr = '@';
2078 }
2079 }
2080 strlist__delete(sdtlist);
2081 }
2082
2083 int print_hwcache_events(const char *event_glob, bool name_only)
2084 {
2085 unsigned int type, op, i, evt_i = 0, evt_num = 0;
2086 char name[64];
2087 char **evt_list = NULL;
2088 bool evt_num_known = false;
2089
2090 restart:
2091 if (evt_num_known) {
2092 evt_list = zalloc(sizeof(char *) * evt_num);
2093 if (!evt_list)
2094 goto out_enomem;
2095 }
2096
2097 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2098 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2099 /* skip invalid cache type */
2100 if (!perf_evsel__is_cache_op_valid(type, op))
2101 continue;
2102
2103 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2104 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2105 name, sizeof(name));
2106 if (event_glob != NULL && !strglobmatch(name, event_glob))
2107 continue;
2108
2109 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2110 type | (op << 8) | (i << 16)))
2111 continue;
2112
2113 if (!evt_num_known) {
2114 evt_num++;
2115 continue;
2116 }
2117
2118 evt_list[evt_i] = strdup(name);
2119 if (evt_list[evt_i] == NULL)
2120 goto out_enomem;
2121 evt_i++;
2122 }
2123 }
2124 }
2125
2126 if (!evt_num_known) {
2127 evt_num_known = true;
2128 goto restart;
2129 }
2130 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2131 evt_i = 0;
2132 while (evt_i < evt_num) {
2133 if (name_only) {
2134 printf("%s ", evt_list[evt_i++]);
2135 continue;
2136 }
2137 printf(" %-50s [%s]\n", evt_list[evt_i++],
2138 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2139 }
2140 if (evt_num && pager_in_use())
2141 printf("\n");
2142
2143 out_free:
2144 evt_num = evt_i;
2145 for (evt_i = 0; evt_i < evt_num; evt_i++)
2146 zfree(&evt_list[evt_i]);
2147 zfree(&evt_list);
2148 return evt_num;
2149
2150 out_enomem:
2151 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2152 if (evt_list)
2153 goto out_free;
2154 return evt_num;
2155 }
2156
2157 void print_symbol_events(const char *event_glob, unsigned type,
2158 struct event_symbol *syms, unsigned max,
2159 bool name_only)
2160 {
2161 unsigned int i, evt_i = 0, evt_num = 0;
2162 char name[MAX_NAME_LEN];
2163 char **evt_list = NULL;
2164 bool evt_num_known = false;
2165
2166 restart:
2167 if (evt_num_known) {
2168 evt_list = zalloc(sizeof(char *) * evt_num);
2169 if (!evt_list)
2170 goto out_enomem;
2171 syms -= max;
2172 }
2173
2174 for (i = 0; i < max; i++, syms++) {
2175
2176 if (event_glob != NULL && syms->symbol != NULL &&
2177 !(strglobmatch(syms->symbol, event_glob) ||
2178 (syms->alias && strglobmatch(syms->alias, event_glob))))
2179 continue;
2180
2181 if (!is_event_supported(type, i))
2182 continue;
2183
2184 if (!evt_num_known) {
2185 evt_num++;
2186 continue;
2187 }
2188
2189 if (!name_only && strlen(syms->alias))
2190 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2191 else
2192 strncpy(name, syms->symbol, MAX_NAME_LEN);
2193
2194 evt_list[evt_i] = strdup(name);
2195 if (evt_list[evt_i] == NULL)
2196 goto out_enomem;
2197 evt_i++;
2198 }
2199
2200 if (!evt_num_known) {
2201 evt_num_known = true;
2202 goto restart;
2203 }
2204 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2205 evt_i = 0;
2206 while (evt_i < evt_num) {
2207 if (name_only) {
2208 printf("%s ", evt_list[evt_i++]);
2209 continue;
2210 }
2211 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2212 }
2213 if (evt_num && pager_in_use())
2214 printf("\n");
2215
2216 out_free:
2217 evt_num = evt_i;
2218 for (evt_i = 0; evt_i < evt_num; evt_i++)
2219 zfree(&evt_list[evt_i]);
2220 zfree(&evt_list);
2221 return;
2222
2223 out_enomem:
2224 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2225 if (evt_list)
2226 goto out_free;
2227 }
2228
2229 /*
2230 * Print the help text for the event symbols:
2231 */
2232 void print_events(const char *event_glob, bool name_only)
2233 {
2234 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2235 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2236
2237 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2238 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2239
2240 print_hwcache_events(event_glob, name_only);
2241
2242 print_pmu_events(event_glob, name_only);
2243
2244 if (event_glob != NULL)
2245 return;
2246
2247 if (!name_only) {
2248 printf(" %-50s [%s]\n",
2249 "rNNN",
2250 event_type_descriptors[PERF_TYPE_RAW]);
2251 printf(" %-50s [%s]\n",
2252 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2253 event_type_descriptors[PERF_TYPE_RAW]);
2254 if (pager_in_use())
2255 printf(" (see 'man perf-list' on how to encode it)\n\n");
2256
2257 printf(" %-50s [%s]\n",
2258 "mem:<addr>[/len][:access]",
2259 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2260 if (pager_in_use())
2261 printf("\n");
2262 }
2263
2264 print_tracepoint_events(NULL, NULL, name_only);
2265
2266 print_sdt_events(NULL, NULL, name_only);
2267 }
2268
2269 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2270 {
2271 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2272 }
2273
2274 static int new_term(struct parse_events_term **_term, int type_val,
2275 int type_term, char *config,
2276 char *str, u64 num, int err_term, int err_val)
2277 {
2278 struct parse_events_term *term;
2279
2280 term = zalloc(sizeof(*term));
2281 if (!term)
2282 return -ENOMEM;
2283
2284 INIT_LIST_HEAD(&term->list);
2285 term->type_val = type_val;
2286 term->type_term = type_term;
2287 term->config = config;
2288 term->err_term = err_term;
2289 term->err_val = err_val;
2290
2291 switch (type_val) {
2292 case PARSE_EVENTS__TERM_TYPE_NUM:
2293 term->val.num = num;
2294 break;
2295 case PARSE_EVENTS__TERM_TYPE_STR:
2296 term->val.str = str;
2297 break;
2298 default:
2299 free(term);
2300 return -EINVAL;
2301 }
2302
2303 *_term = term;
2304 return 0;
2305 }
2306
2307 int parse_events_term__num(struct parse_events_term **term,
2308 int type_term, char *config, u64 num,
2309 void *loc_term_, void *loc_val_)
2310 {
2311 YYLTYPE *loc_term = loc_term_;
2312 YYLTYPE *loc_val = loc_val_;
2313
2314 return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
2315 config, NULL, num,
2316 loc_term ? loc_term->first_column : 0,
2317 loc_val ? loc_val->first_column : 0);
2318 }
2319
2320 int parse_events_term__str(struct parse_events_term **term,
2321 int type_term, char *config, char *str,
2322 void *loc_term_, void *loc_val_)
2323 {
2324 YYLTYPE *loc_term = loc_term_;
2325 YYLTYPE *loc_val = loc_val_;
2326
2327 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
2328 config, str, 0,
2329 loc_term ? loc_term->first_column : 0,
2330 loc_val ? loc_val->first_column : 0);
2331 }
2332
2333 int parse_events_term__sym_hw(struct parse_events_term **term,
2334 char *config, unsigned idx)
2335 {
2336 struct event_symbol *sym;
2337
2338 BUG_ON(idx >= PERF_COUNT_HW_MAX);
2339 sym = &event_symbols_hw[idx];
2340
2341 if (config)
2342 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2343 PARSE_EVENTS__TERM_TYPE_USER, config,
2344 (char *) sym->symbol, 0, 0, 0);
2345 else
2346 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2347 PARSE_EVENTS__TERM_TYPE_USER,
2348 (char *) "event", (char *) sym->symbol,
2349 0, 0, 0);
2350 }
2351
2352 int parse_events_term__clone(struct parse_events_term **new,
2353 struct parse_events_term *term)
2354 {
2355 return new_term(new, term->type_val, term->type_term, term->config,
2356 term->val.str, term->val.num,
2357 term->err_term, term->err_val);
2358 }
2359
2360 void parse_events_terms__purge(struct list_head *terms)
2361 {
2362 struct parse_events_term *term, *h;
2363
2364 list_for_each_entry_safe(term, h, terms, list) {
2365 if (term->array.nr_ranges)
2366 free(term->array.ranges);
2367 list_del_init(&term->list);
2368 free(term);
2369 }
2370 }
2371
2372 void parse_events_terms__delete(struct list_head *terms)
2373 {
2374 if (!terms)
2375 return;
2376 parse_events_terms__purge(terms);
2377 free(terms);
2378 }
2379
2380 void parse_events__clear_array(struct parse_events_array *a)
2381 {
2382 free(a->ranges);
2383 }
2384
2385 void parse_events_evlist_error(struct parse_events_evlist *data,
2386 int idx, const char *str)
2387 {
2388 struct parse_events_error *err = data->error;
2389
2390 if (!err)
2391 return;
2392 err->idx = idx;
2393 err->str = strdup(str);
2394 WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2395 }
2396
2397 static void config_terms_list(char *buf, size_t buf_sz)
2398 {
2399 int i;
2400 bool first = true;
2401
2402 buf[0] = '\0';
2403 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2404 const char *name = config_term_names[i];
2405
2406 if (!config_term_avail(i, NULL))
2407 continue;
2408 if (!name)
2409 continue;
2410 if (name[0] == '<')
2411 continue;
2412
2413 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2414 return;
2415
2416 if (!first)
2417 strcat(buf, ",");
2418 else
2419 first = false;
2420 strcat(buf, name);
2421 }
2422 }
2423
2424 /*
2425 * Return string contains valid config terms of an event.
2426 * @additional_terms: For terms such as PMU sysfs terms.
2427 */
2428 char *parse_events_formats_error_string(char *additional_terms)
2429 {
2430 char *str;
2431 /* "no-overwrite" is the longest name */
2432 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2433 (sizeof("no-overwrite") - 1)];
2434
2435 config_terms_list(static_terms, sizeof(static_terms));
2436 /* valid terms */
2437 if (additional_terms) {
2438 if (asprintf(&str, "valid terms: %s,%s",
2439 additional_terms, static_terms) < 0)
2440 goto fail;
2441 } else {
2442 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2443 goto fail;
2444 }
2445 return str;
2446
2447 fail:
2448 return NULL;
2449 }
Linux kernel - Deliverables
This page took 0.350486 seconds and 5 git commands to generate.