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Linux 5.1.15
[linux/fpc-iii.git] / tools / perf / util / parse-events.c
blob5ef4939408f2a5b2394943f5313607ec7e73e4a4
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/types.h>
8 #include <sys/stat.h>
9 #include <fcntl.h>
10 #include <sys/param.h>
11 #include "term.h"
12 #include "../perf.h"
13 #include "evlist.h"
14 #include "evsel.h"
15 #include <subcmd/parse-options.h>
16 #include "parse-events.h"
17 #include <subcmd/exec-cmd.h>
18 #include "string2.h"
19 #include "strlist.h"
20 #include "symbol.h"
21 #include "cache.h"
22 #include "header.h"
23 #include "bpf-loader.h"
24 #include "debug.h"
25 #include <api/fs/tracing_path.h>
26 #include "parse-events-bison.h"
27 #define YY_EXTRA_TYPE int
28 #include "parse-events-flex.h"
29 #include "pmu.h"
30 #include "thread_map.h"
31 #include "cpumap.h"
32 #include "probe-file.h"
33 #include "asm/bug.h"
34 #include "util/parse-branch-options.h"
35 #include "metricgroup.h"
36
37 #define MAX_NAME_LEN 100
38
39 #ifdef PARSER_DEBUG
40 extern int parse_events_debug;
41 #endif
42 int parse_events_parse(void *parse_state, void *scanner);
43 static int get_config_terms(struct list_head *head_config,
44 struct list_head *head_terms __maybe_unused);
45
46 static struct perf_pmu_event_symbol *perf_pmu_events_list;
47 /*
48 * The variable indicates the number of supported pmu event symbols.
49 * 0 means not initialized and ready to init
50 * -1 means failed to init, don't try anymore
51 * >0 is the number of supported pmu event symbols
52 */
53 static int perf_pmu_events_list_num;
54
55 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
56 [PERF_COUNT_HW_CPU_CYCLES] = {
57 .symbol = "cpu-cycles",
58 .alias = "cycles",
59 },
60 [PERF_COUNT_HW_INSTRUCTIONS] = {
61 .symbol = "instructions",
62 .alias = "",
63 },
64 [PERF_COUNT_HW_CACHE_REFERENCES] = {
65 .symbol = "cache-references",
66 .alias = "",
67 },
68 [PERF_COUNT_HW_CACHE_MISSES] = {
69 .symbol = "cache-misses",
70 .alias = "",
71 },
72 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
73 .symbol = "branch-instructions",
74 .alias = "branches",
75 },
76 [PERF_COUNT_HW_BRANCH_MISSES] = {
77 .symbol = "branch-misses",
78 .alias = "",
79 },
80 [PERF_COUNT_HW_BUS_CYCLES] = {
81 .symbol = "bus-cycles",
82 .alias = "",
83 },
84 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
85 .symbol = "stalled-cycles-frontend",
86 .alias = "idle-cycles-frontend",
87 },
88 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
89 .symbol = "stalled-cycles-backend",
90 .alias = "idle-cycles-backend",
91 },
92 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
93 .symbol = "ref-cycles",
94 .alias = "",
95 },
96 };
97
98 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
99 [PERF_COUNT_SW_CPU_CLOCK] = {
100 .symbol = "cpu-clock",
101 .alias = "",
102 },
103 [PERF_COUNT_SW_TASK_CLOCK] = {
104 .symbol = "task-clock",
105 .alias = "",
106 },
107 [PERF_COUNT_SW_PAGE_FAULTS] = {
108 .symbol = "page-faults",
109 .alias = "faults",
110 },
111 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
112 .symbol = "context-switches",
113 .alias = "cs",
114 },
115 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
116 .symbol = "cpu-migrations",
117 .alias = "migrations",
118 },
119 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
120 .symbol = "minor-faults",
121 .alias = "",
122 },
123 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
124 .symbol = "major-faults",
125 .alias = "",
126 },
127 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
128 .symbol = "alignment-faults",
129 .alias = "",
130 },
131 [PERF_COUNT_SW_EMULATION_FAULTS] = {
132 .symbol = "emulation-faults",
133 .alias = "",
134 },
135 [PERF_COUNT_SW_DUMMY] = {
136 .symbol = "dummy",
137 .alias = "",
138 },
139 [PERF_COUNT_SW_BPF_OUTPUT] = {
140 .symbol = "bpf-output",
141 .alias = "",
142 },
143 };
144
145 #define __PERF_EVENT_FIELD(config, name) \
146 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
147
148 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
149 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
150 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
151 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
152
153 #define for_each_subsystem(sys_dir, sys_dirent) \
154 while ((sys_dirent = readdir(sys_dir)) != NULL) \
155 if (sys_dirent->d_type == DT_DIR && \
156 (strcmp(sys_dirent->d_name, ".")) && \
157 (strcmp(sys_dirent->d_name, "..")))
158
159 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
160 {
161 char evt_path[MAXPATHLEN];
162 int fd;
163
164 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
165 fd = open(evt_path, O_RDONLY);
166 if (fd < 0)
167 return -EINVAL;
168 close(fd);
169
170 return 0;
171 }
172
173 #define for_each_event(dir_path, evt_dir, evt_dirent) \
174 while ((evt_dirent = readdir(evt_dir)) != NULL) \
175 if (evt_dirent->d_type == DT_DIR && \
176 (strcmp(evt_dirent->d_name, ".")) && \
177 (strcmp(evt_dirent->d_name, "..")) && \
178 (!tp_event_has_id(dir_path, evt_dirent)))
179
180 #define MAX_EVENT_LENGTH 512
181
182
183 struct tracepoint_path *tracepoint_id_to_path(u64 config)
184 {
185 struct tracepoint_path *path = NULL;
186 DIR *sys_dir, *evt_dir;
187 struct dirent *sys_dirent, *evt_dirent;
188 char id_buf[24];
189 int fd;
190 u64 id;
191 char evt_path[MAXPATHLEN];
192 char *dir_path;
193
194 sys_dir = tracing_events__opendir();
195 if (!sys_dir)
196 return NULL;
197
198 for_each_subsystem(sys_dir, sys_dirent) {
199 dir_path = get_events_file(sys_dirent->d_name);
200 if (!dir_path)
201 continue;
202 evt_dir = opendir(dir_path);
203 if (!evt_dir)
204 goto next;
205
206 for_each_event(dir_path, evt_dir, evt_dirent) {
207
208 scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
209 evt_dirent->d_name);
210 fd = open(evt_path, O_RDONLY);
211 if (fd < 0)
212 continue;
213 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
214 close(fd);
215 continue;
216 }
217 close(fd);
218 id = atoll(id_buf);
219 if (id == config) {
220 put_events_file(dir_path);
221 closedir(evt_dir);
222 closedir(sys_dir);
223 path = zalloc(sizeof(*path));
224 if (!path)
225 return NULL;
226 path->system = malloc(MAX_EVENT_LENGTH);
227 if (!path->system) {
228 free(path);
229 return NULL;
230 }
231 path->name = malloc(MAX_EVENT_LENGTH);
232 if (!path->name) {
233 zfree(&path->system);
234 free(path);
235 return NULL;
236 }
237 strncpy(path->system, sys_dirent->d_name,
238 MAX_EVENT_LENGTH);
239 strncpy(path->name, evt_dirent->d_name,
240 MAX_EVENT_LENGTH);
241 return path;
242 }
243 }
244 closedir(evt_dir);
245 next:
246 put_events_file(dir_path);
247 }
248
249 closedir(sys_dir);
250 return NULL;
251 }
252
253 struct tracepoint_path *tracepoint_name_to_path(const char *name)
254 {
255 struct tracepoint_path *path = zalloc(sizeof(*path));
256 char *str = strchr(name, ':');
257
258 if (path == NULL || str == NULL) {
259 free(path);
260 return NULL;
261 }
262
263 path->system = strndup(name, str - name);
264 path->name = strdup(str+1);
265
266 if (path->system == NULL || path->name == NULL) {
267 zfree(&path->system);
268 zfree(&path->name);
269 zfree(&path);
270 }
271
272 return path;
273 }
274
275 const char *event_type(int type)
276 {
277 switch (type) {
278 case PERF_TYPE_HARDWARE:
279 return "hardware";
280
281 case PERF_TYPE_SOFTWARE:
282 return "software";
283
284 case PERF_TYPE_TRACEPOINT:
285 return "tracepoint";
286
287 case PERF_TYPE_HW_CACHE:
288 return "hardware-cache";
289
290 default:
291 break;
292 }
293
294 return "unknown";
295 }
296
297 static int parse_events__is_name_term(struct parse_events_term *term)
298 {
299 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
300 }
301
302 static char *get_config_name(struct list_head *head_terms)
303 {
304 struct parse_events_term *term;
305
306 if (!head_terms)
307 return NULL;
308
309 list_for_each_entry(term, head_terms, list)
310 if (parse_events__is_name_term(term))
311 return term->val.str;
312
313 return NULL;
314 }
315
316 static struct perf_evsel *
317 __add_event(struct list_head *list, int *idx,
318 struct perf_event_attr *attr,
319 char *name, struct perf_pmu *pmu,
320 struct list_head *config_terms, bool auto_merge_stats)
321 {
322 struct perf_evsel *evsel;
323 struct cpu_map *cpus = pmu ? pmu->cpus : NULL;
324
325 event_attr_init(attr);
326
327 evsel = perf_evsel__new_idx(attr, *idx);
328 if (!evsel)
329 return NULL;
330
331 (*idx)++;
332 evsel->cpus = cpu_map__get(cpus);
333 evsel->own_cpus = cpu_map__get(cpus);
334 evsel->system_wide = pmu ? pmu->is_uncore : false;
335 evsel->auto_merge_stats = auto_merge_stats;
336
337 if (name)
338 evsel->name = strdup(name);
339
340 if (config_terms)
341 list_splice(config_terms, &evsel->config_terms);
342
343 list_add_tail(&evsel->node, list);
344 return evsel;
345 }
346
347 static int add_event(struct list_head *list, int *idx,
348 struct perf_event_attr *attr, char *name,
349 struct list_head *config_terms)
350 {
351 return __add_event(list, idx, attr, name, NULL, config_terms, false) ? 0 : -ENOMEM;
352 }
353
354 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
355 {
356 int i, j;
357 int n, longest = -1;
358
359 for (i = 0; i < size; i++) {
360 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
361 n = strlen(names[i][j]);
362 if (n > longest && !strncasecmp(str, names[i][j], n))
363 longest = n;
364 }
365 if (longest > 0)
366 return i;
367 }
368
369 return -1;
370 }
371
372 typedef int config_term_func_t(struct perf_event_attr *attr,
373 struct parse_events_term *term,
374 struct parse_events_error *err);
375 static int config_term_common(struct perf_event_attr *attr,
376 struct parse_events_term *term,
377 struct parse_events_error *err);
378 static int config_attr(struct perf_event_attr *attr,
379 struct list_head *head,
380 struct parse_events_error *err,
381 config_term_func_t config_term);
382
383 int parse_events_add_cache(struct list_head *list, int *idx,
384 char *type, char *op_result1, char *op_result2,
385 struct parse_events_error *err,
386 struct list_head *head_config)
387 {
388 struct perf_event_attr attr;
389 LIST_HEAD(config_terms);
390 char name[MAX_NAME_LEN], *config_name;
391 int cache_type = -1, cache_op = -1, cache_result = -1;
392 char *op_result[2] = { op_result1, op_result2 };
393 int i, n;
394
395 /*
396 * No fallback - if we cannot get a clear cache type
397 * then bail out:
398 */
399 cache_type = parse_aliases(type, perf_evsel__hw_cache,
400 PERF_COUNT_HW_CACHE_MAX);
401 if (cache_type == -1)
402 return -EINVAL;
403
404 config_name = get_config_name(head_config);
405 n = snprintf(name, MAX_NAME_LEN, "%s", type);
406
407 for (i = 0; (i < 2) && (op_result[i]); i++) {
408 char *str = op_result[i];
409
410 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
411
412 if (cache_op == -1) {
413 cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
414 PERF_COUNT_HW_CACHE_OP_MAX);
415 if (cache_op >= 0) {
416 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
417 return -EINVAL;
418 continue;
419 }
420 }
421
422 if (cache_result == -1) {
423 cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
424 PERF_COUNT_HW_CACHE_RESULT_MAX);
425 if (cache_result >= 0)
426 continue;
427 }
428 }
429
430 /*
431 * Fall back to reads:
432 */
433 if (cache_op == -1)
434 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
435
436 /*
437 * Fall back to accesses:
438 */
439 if (cache_result == -1)
440 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
441
442 memset(&attr, 0, sizeof(attr));
443 attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
444 attr.type = PERF_TYPE_HW_CACHE;
445
446 if (head_config) {
447 if (config_attr(&attr, head_config, err,
448 config_term_common))
449 return -EINVAL;
450
451 if (get_config_terms(head_config, &config_terms))
452 return -ENOMEM;
453 }
454 return add_event(list, idx, &attr, config_name ? : name, &config_terms);
455 }
456
457 static void tracepoint_error(struct parse_events_error *e, int err,
458 const char *sys, const char *name)
459 {
460 char help[BUFSIZ];
461
462 if (!e)
463 return;
464
465 /*
466 * We get error directly from syscall errno ( > 0),
467 * or from encoded pointer's error ( < 0).
468 */
469 err = abs(err);
470
471 switch (err) {
472 case EACCES:
473 e->str = strdup("can't access trace events");
474 break;
475 case ENOENT:
476 e->str = strdup("unknown tracepoint");
477 break;
478 default:
479 e->str = strdup("failed to add tracepoint");
480 break;
481 }
482
483 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
484 e->help = strdup(help);
485 }
486
487 static int add_tracepoint(struct list_head *list, int *idx,
488 const char *sys_name, const char *evt_name,
489 struct parse_events_error *err,
490 struct list_head *head_config)
491 {
492 struct perf_evsel *evsel;
493
494 evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
495 if (IS_ERR(evsel)) {
496 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
497 return PTR_ERR(evsel);
498 }
499
500 if (head_config) {
501 LIST_HEAD(config_terms);
502
503 if (get_config_terms(head_config, &config_terms))
504 return -ENOMEM;
505 list_splice(&config_terms, &evsel->config_terms);
506 }
507
508 list_add_tail(&evsel->node, list);
509 return 0;
510 }
511
512 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
513 const char *sys_name, const char *evt_name,
514 struct parse_events_error *err,
515 struct list_head *head_config)
516 {
517 char *evt_path;
518 struct dirent *evt_ent;
519 DIR *evt_dir;
520 int ret = 0, found = 0;
521
522 evt_path = get_events_file(sys_name);
523 if (!evt_path) {
524 tracepoint_error(err, errno, sys_name, evt_name);
525 return -1;
526 }
527 evt_dir = opendir(evt_path);
528 if (!evt_dir) {
529 put_events_file(evt_path);
530 tracepoint_error(err, errno, sys_name, evt_name);
531 return -1;
532 }
533
534 while (!ret && (evt_ent = readdir(evt_dir))) {
535 if (!strcmp(evt_ent->d_name, ".")
536 || !strcmp(evt_ent->d_name, "..")
537 || !strcmp(evt_ent->d_name, "enable")
538 || !strcmp(evt_ent->d_name, "filter"))
539 continue;
540
541 if (!strglobmatch(evt_ent->d_name, evt_name))
542 continue;
543
544 found++;
545
546 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
547 err, head_config);
548 }
549
550 if (!found) {
551 tracepoint_error(err, ENOENT, sys_name, evt_name);
552 ret = -1;
553 }
554
555 put_events_file(evt_path);
556 closedir(evt_dir);
557 return ret;
558 }
559
560 static int add_tracepoint_event(struct list_head *list, int *idx,
561 const char *sys_name, const char *evt_name,
562 struct parse_events_error *err,
563 struct list_head *head_config)
564 {
565 return strpbrk(evt_name, "*?") ?
566 add_tracepoint_multi_event(list, idx, sys_name, evt_name,
567 err, head_config) :
568 add_tracepoint(list, idx, sys_name, evt_name,
569 err, head_config);
570 }
571
572 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
573 const char *sys_name, const char *evt_name,
574 struct parse_events_error *err,
575 struct list_head *head_config)
576 {
577 struct dirent *events_ent;
578 DIR *events_dir;
579 int ret = 0;
580
581 events_dir = tracing_events__opendir();
582 if (!events_dir) {
583 tracepoint_error(err, errno, sys_name, evt_name);
584 return -1;
585 }
586
587 while (!ret && (events_ent = readdir(events_dir))) {
588 if (!strcmp(events_ent->d_name, ".")
589 || !strcmp(events_ent->d_name, "..")
590 || !strcmp(events_ent->d_name, "enable")
591 || !strcmp(events_ent->d_name, "header_event")
592 || !strcmp(events_ent->d_name, "header_page"))
593 continue;
594
595 if (!strglobmatch(events_ent->d_name, sys_name))
596 continue;
597
598 ret = add_tracepoint_event(list, idx, events_ent->d_name,
599 evt_name, err, head_config);
600 }
601
602 closedir(events_dir);
603 return ret;
604 }
605
606 struct __add_bpf_event_param {
607 struct parse_events_state *parse_state;
608 struct list_head *list;
609 struct list_head *head_config;
610 };
611
612 static int add_bpf_event(const char *group, const char *event, int fd,
613 void *_param)
614 {
615 LIST_HEAD(new_evsels);
616 struct __add_bpf_event_param *param = _param;
617 struct parse_events_state *parse_state = param->parse_state;
618 struct list_head *list = param->list;
619 struct perf_evsel *pos;
620 int err;
621
622 pr_debug("add bpf event %s:%s and attach bpf program %d\n",
623 group, event, fd);
624
625 err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
626 event, parse_state->error,
627 param->head_config);
628 if (err) {
629 struct perf_evsel *evsel, *tmp;
630
631 pr_debug("Failed to add BPF event %s:%s\n",
632 group, event);
633 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
634 list_del(&evsel->node);
635 perf_evsel__delete(evsel);
636 }
637 return err;
638 }
639 pr_debug("adding %s:%s\n", group, event);
640
641 list_for_each_entry(pos, &new_evsels, node) {
642 pr_debug("adding %s:%s to %p\n",
643 group, event, pos);
644 pos->bpf_fd = fd;
645 }
646 list_splice(&new_evsels, list);
647 return 0;
648 }
649
650 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
651 struct list_head *list,
652 struct bpf_object *obj,
653 struct list_head *head_config)
654 {
655 int err;
656 char errbuf[BUFSIZ];
657 struct __add_bpf_event_param param = {parse_state, list, head_config};
658 static bool registered_unprobe_atexit = false;
659
660 if (IS_ERR(obj) || !obj) {
661 snprintf(errbuf, sizeof(errbuf),
662 "Internal error: load bpf obj with NULL");
663 err = -EINVAL;
664 goto errout;
665 }
666
667 /*
668 * Register atexit handler before calling bpf__probe() so
669 * bpf__probe() don't need to unprobe probe points its already
670 * created when failure.
671 */
672 if (!registered_unprobe_atexit) {
673 atexit(bpf__clear);
674 registered_unprobe_atexit = true;
675 }
676
677 err = bpf__probe(obj);
678 if (err) {
679 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
680 goto errout;
681 }
682
683 err = bpf__load(obj);
684 if (err) {
685 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
686 goto errout;
687 }
688
689 err = bpf__foreach_event(obj, add_bpf_event, &param);
690 if (err) {
691 snprintf(errbuf, sizeof(errbuf),
692 "Attach events in BPF object failed");
693 goto errout;
694 }
695
696 return 0;
697 errout:
698 parse_state->error->help = strdup("(add -v to see detail)");
699 parse_state->error->str = strdup(errbuf);
700 return err;
701 }
702
703 static int
704 parse_events_config_bpf(struct parse_events_state *parse_state,
705 struct bpf_object *obj,
706 struct list_head *head_config)
707 {
708 struct parse_events_term *term;
709 int error_pos;
710
711 if (!head_config || list_empty(head_config))
712 return 0;
713
714 list_for_each_entry(term, head_config, list) {
715 char errbuf[BUFSIZ];
716 int err;
717
718 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
719 snprintf(errbuf, sizeof(errbuf),
720 "Invalid config term for BPF object");
721 errbuf[BUFSIZ - 1] = '\0';
722
723 parse_state->error->idx = term->err_term;
724 parse_state->error->str = strdup(errbuf);
725 return -EINVAL;
726 }
727
728 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
729 if (err) {
730 bpf__strerror_config_obj(obj, term, parse_state->evlist,
731 &error_pos, err, errbuf,
732 sizeof(errbuf));
733 parse_state->error->help = strdup(
734 "Hint:\tValid config terms:\n"
735 " \tmap:[<arraymap>].value<indices>=[value]\n"
736 " \tmap:[<eventmap>].event<indices>=[event]\n"
737 "\n"
738 " \twhere <indices> is something like [0,3...5] or [all]\n"
739 " \t(add -v to see detail)");
740 parse_state->error->str = strdup(errbuf);
741 if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
742 parse_state->error->idx = term->err_val;
743 else
744 parse_state->error->idx = term->err_term + error_pos;
745 return err;
746 }
747 }
748 return 0;
749 }
750
751 /*
752 * Split config terms:
753 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
754 * 'call-graph=fp' is 'evt config', should be applied to each
755 * events in bpf.c.
756 * 'map:array.value[0]=1' is 'obj config', should be processed
757 * with parse_events_config_bpf.
758 *
759 * Move object config terms from the first list to obj_head_config.
760 */
761 static void
762 split_bpf_config_terms(struct list_head *evt_head_config,
763 struct list_head *obj_head_config)
764 {
765 struct parse_events_term *term, *temp;
766
767 /*
768 * Currectly, all possible user config term
769 * belong to bpf object. parse_events__is_hardcoded_term()
770 * happends to be a good flag.
771 *
772 * See parse_events_config_bpf() and
773 * config_term_tracepoint().
774 */
775 list_for_each_entry_safe(term, temp, evt_head_config, list)
776 if (!parse_events__is_hardcoded_term(term))
777 list_move_tail(&term->list, obj_head_config);
778 }
779
780 int parse_events_load_bpf(struct parse_events_state *parse_state,
781 struct list_head *list,
782 char *bpf_file_name,
783 bool source,
784 struct list_head *head_config)
785 {
786 int err;
787 struct bpf_object *obj;
788 LIST_HEAD(obj_head_config);
789
790 if (head_config)
791 split_bpf_config_terms(head_config, &obj_head_config);
792
793 obj = bpf__prepare_load(bpf_file_name, source);
794 if (IS_ERR(obj)) {
795 char errbuf[BUFSIZ];
796
797 err = PTR_ERR(obj);
798
799 if (err == -ENOTSUP)
800 snprintf(errbuf, sizeof(errbuf),
801 "BPF support is not compiled");
802 else
803 bpf__strerror_prepare_load(bpf_file_name,
804 source,
805 -err, errbuf,
806 sizeof(errbuf));
807
808 parse_state->error->help = strdup("(add -v to see detail)");
809 parse_state->error->str = strdup(errbuf);
810 return err;
811 }
812
813 err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
814 if (err)
815 return err;
816 err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
817
818 /*
819 * Caller doesn't know anything about obj_head_config,
820 * so combine them together again before returnning.
821 */
822 if (head_config)
823 list_splice_tail(&obj_head_config, head_config);
824 return err;
825 }
826
827 static int
828 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
829 {
830 int i;
831
832 for (i = 0; i < 3; i++) {
833 if (!type || !type[i])
834 break;
835
836 #define CHECK_SET_TYPE(bit) \
837 do { \
838 if (attr->bp_type & bit) \
839 return -EINVAL; \
840 else \
841 attr->bp_type |= bit; \
842 } while (0)
843
844 switch (type[i]) {
845 case 'r':
846 CHECK_SET_TYPE(HW_BREAKPOINT_R);
847 break;
848 case 'w':
849 CHECK_SET_TYPE(HW_BREAKPOINT_W);
850 break;
851 case 'x':
852 CHECK_SET_TYPE(HW_BREAKPOINT_X);
853 break;
854 default:
855 return -EINVAL;
856 }
857 }
858
859 #undef CHECK_SET_TYPE
860
861 if (!attr->bp_type) /* Default */
862 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
863
864 return 0;
865 }
866
867 int parse_events_add_breakpoint(struct list_head *list, int *idx,
868 void *ptr, char *type, u64 len)
869 {
870 struct perf_event_attr attr;
871
872 memset(&attr, 0, sizeof(attr));
873 attr.bp_addr = (unsigned long) ptr;
874
875 if (parse_breakpoint_type(type, &attr))
876 return -EINVAL;
877
878 /* Provide some defaults if len is not specified */
879 if (!len) {
880 if (attr.bp_type == HW_BREAKPOINT_X)
881 len = sizeof(long);
882 else
883 len = HW_BREAKPOINT_LEN_4;
884 }
885
886 attr.bp_len = len;
887
888 attr.type = PERF_TYPE_BREAKPOINT;
889 attr.sample_period = 1;
890
891 return add_event(list, idx, &attr, NULL, NULL);
892 }
893
894 static int check_type_val(struct parse_events_term *term,
895 struct parse_events_error *err,
896 int type)
897 {
898 if (type == term->type_val)
899 return 0;
900
901 if (err) {
902 err->idx = term->err_val;
903 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
904 err->str = strdup("expected numeric value");
905 else
906 err->str = strdup("expected string value");
907 }
908 return -EINVAL;
909 }
910
911 /*
912 * Update according to parse-events.l
913 */
914 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
915 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>",
916 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config",
917 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1",
918 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2",
919 [PARSE_EVENTS__TERM_TYPE_NAME] = "name",
920 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period",
921 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq",
922 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type",
923 [PARSE_EVENTS__TERM_TYPE_TIME] = "time",
924 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph",
925 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size",
926 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit",
927 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit",
928 [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack",
929 [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS] = "nr",
930 [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite",
931 [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite",
932 [PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config",
933 };
934
935 static bool config_term_shrinked;
936
937 static bool
938 config_term_avail(int term_type, struct parse_events_error *err)
939 {
940 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
941 err->str = strdup("Invalid term_type");
942 return false;
943 }
944 if (!config_term_shrinked)
945 return true;
946
947 switch (term_type) {
948 case PARSE_EVENTS__TERM_TYPE_CONFIG:
949 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
950 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
951 case PARSE_EVENTS__TERM_TYPE_NAME:
952 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
953 return true;
954 default:
955 if (!err)
956 return false;
957
958 /* term_type is validated so indexing is safe */
959 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
960 config_term_names[term_type]) < 0)
961 err->str = NULL;
962 return false;
963 }
964 }
965
966 void parse_events__shrink_config_terms(void)
967 {
968 config_term_shrinked = true;
969 }
970
971 static int config_term_common(struct perf_event_attr *attr,
972 struct parse_events_term *term,
973 struct parse_events_error *err)
974 {
975 #define CHECK_TYPE_VAL(type) \
976 do { \
977 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
978 return -EINVAL; \
979 } while (0)
980
981 switch (term->type_term) {
982 case PARSE_EVENTS__TERM_TYPE_CONFIG:
983 CHECK_TYPE_VAL(NUM);
984 attr->config = term->val.num;
985 break;
986 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
987 CHECK_TYPE_VAL(NUM);
988 attr->config1 = term->val.num;
989 break;
990 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
991 CHECK_TYPE_VAL(NUM);
992 attr->config2 = term->val.num;
993 break;
994 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
995 CHECK_TYPE_VAL(NUM);
996 break;
997 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
998 CHECK_TYPE_VAL(NUM);
999 break;
1000 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1001 CHECK_TYPE_VAL(STR);
1002 if (strcmp(term->val.str, "no") &&
1003 parse_branch_str(term->val.str, &attr->branch_sample_type)) {
1004 err->str = strdup("invalid branch sample type");
1005 err->idx = term->err_val;
1006 return -EINVAL;
1007 }
1008 break;
1009 case PARSE_EVENTS__TERM_TYPE_TIME:
1010 CHECK_TYPE_VAL(NUM);
1011 if (term->val.num > 1) {
1012 err->str = strdup("expected 0 or 1");
1013 err->idx = term->err_val;
1014 return -EINVAL;
1015 }
1016 break;
1017 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1018 CHECK_TYPE_VAL(STR);
1019 break;
1020 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1021 CHECK_TYPE_VAL(NUM);
1022 break;
1023 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1024 CHECK_TYPE_VAL(NUM);
1025 break;
1026 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1027 CHECK_TYPE_VAL(NUM);
1028 break;
1029 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1030 CHECK_TYPE_VAL(NUM);
1031 break;
1032 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1033 CHECK_TYPE_VAL(NUM);
1034 break;
1035 case PARSE_EVENTS__TERM_TYPE_NAME:
1036 CHECK_TYPE_VAL(STR);
1037 break;
1038 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1039 CHECK_TYPE_VAL(NUM);
1040 break;
1041 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1042 CHECK_TYPE_VAL(NUM);
1043 break;
1044 default:
1045 err->str = strdup("unknown term");
1046 err->idx = term->err_term;
1047 err->help = parse_events_formats_error_string(NULL);
1048 return -EINVAL;
1049 }
1050
1051 /*
1052 * Check term availbility after basic checking so
1053 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1054 *
1055 * If check availbility at the entry of this function,
1056 * user will see "'<sysfs term>' is not usable in 'perf stat'"
1057 * if an invalid config term is provided for legacy events
1058 * (for example, instructions/badterm/...), which is confusing.
1059 */
1060 if (!config_term_avail(term->type_term, err))
1061 return -EINVAL;
1062 return 0;
1063 #undef CHECK_TYPE_VAL
1064 }
1065
1066 static int config_term_pmu(struct perf_event_attr *attr,
1067 struct parse_events_term *term,
1068 struct parse_events_error *err)
1069 {
1070 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1071 term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1072 /*
1073 * Always succeed for sysfs terms, as we dont know
1074 * at this point what type they need to have.
1075 */
1076 return 0;
1077 else
1078 return config_term_common(attr, term, err);
1079 }
1080
1081 static int config_term_tracepoint(struct perf_event_attr *attr,
1082 struct parse_events_term *term,
1083 struct parse_events_error *err)
1084 {
1085 switch (term->type_term) {
1086 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1087 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1088 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1089 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1090 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1091 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1092 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1093 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1094 return config_term_common(attr, term, err);
1095 default:
1096 if (err) {
1097 err->idx = term->err_term;
1098 err->str = strdup("unknown term");
1099 err->help = strdup("valid terms: call-graph,stack-size\n");
1100 }
1101 return -EINVAL;
1102 }
1103
1104 return 0;
1105 }
1106
1107 static int config_attr(struct perf_event_attr *attr,
1108 struct list_head *head,
1109 struct parse_events_error *err,
1110 config_term_func_t config_term)
1111 {
1112 struct parse_events_term *term;
1113
1114 list_for_each_entry(term, head, list)
1115 if (config_term(attr, term, err))
1116 return -EINVAL;
1117
1118 return 0;
1119 }
1120
1121 static int get_config_terms(struct list_head *head_config,
1122 struct list_head *head_terms __maybe_unused)
1123 {
1124 #define ADD_CONFIG_TERM(__type, __name, __val) \
1125 do { \
1126 struct perf_evsel_config_term *__t; \
1127 \
1128 __t = zalloc(sizeof(*__t)); \
1129 if (!__t) \
1130 return -ENOMEM; \
1131 \
1132 INIT_LIST_HEAD(&__t->list); \
1133 __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
1134 __t->val.__name = __val; \
1135 __t->weak = term->weak; \
1136 list_add_tail(&__t->list, head_terms); \
1137 } while (0)
1138
1139 struct parse_events_term *term;
1140
1141 list_for_each_entry(term, head_config, list) {
1142 switch (term->type_term) {
1143 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1144 ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1145 break;
1146 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1147 ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1148 break;
1149 case PARSE_EVENTS__TERM_TYPE_TIME:
1150 ADD_CONFIG_TERM(TIME, time, term->val.num);
1151 break;
1152 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1153 ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1154 break;
1155 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1156 ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1157 break;
1158 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1159 ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1160 break;
1161 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1162 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1163 break;
1164 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1165 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1166 break;
1167 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1168 ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1169 break;
1170 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1171 ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num);
1172 break;
1173 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1174 ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1175 break;
1176 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1177 ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1178 break;
1179 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1180 ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1181 break;
1182 default:
1183 break;
1184 }
1185 }
1186 #undef ADD_EVSEL_CONFIG
1187 return 0;
1188 }
1189
1190 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1191 const char *sys, const char *event,
1192 struct parse_events_error *err,
1193 struct list_head *head_config)
1194 {
1195 if (head_config) {
1196 struct perf_event_attr attr;
1197
1198 if (config_attr(&attr, head_config, err,
1199 config_term_tracepoint))
1200 return -EINVAL;
1201 }
1202
1203 if (strpbrk(sys, "*?"))
1204 return add_tracepoint_multi_sys(list, idx, sys, event,
1205 err, head_config);
1206 else
1207 return add_tracepoint_event(list, idx, sys, event,
1208 err, head_config);
1209 }
1210
1211 int parse_events_add_numeric(struct parse_events_state *parse_state,
1212 struct list_head *list,
1213 u32 type, u64 config,
1214 struct list_head *head_config)
1215 {
1216 struct perf_event_attr attr;
1217 LIST_HEAD(config_terms);
1218
1219 memset(&attr, 0, sizeof(attr));
1220 attr.type = type;
1221 attr.config = config;
1222
1223 if (head_config) {
1224 if (config_attr(&attr, head_config, parse_state->error,
1225 config_term_common))
1226 return -EINVAL;
1227
1228 if (get_config_terms(head_config, &config_terms))
1229 return -ENOMEM;
1230 }
1231
1232 return add_event(list, &parse_state->idx, &attr,
1233 get_config_name(head_config), &config_terms);
1234 }
1235
1236 int parse_events_add_pmu(struct parse_events_state *parse_state,
1237 struct list_head *list, char *name,
1238 struct list_head *head_config,
1239 bool auto_merge_stats,
1240 bool use_alias)
1241 {
1242 struct perf_event_attr attr;
1243 struct perf_pmu_info info;
1244 struct perf_pmu *pmu;
1245 struct perf_evsel *evsel;
1246 struct parse_events_error *err = parse_state->error;
1247 bool use_uncore_alias;
1248 LIST_HEAD(config_terms);
1249
1250 pmu = perf_pmu__find(name);
1251 if (!pmu) {
1252 if (asprintf(&err->str,
1253 "Cannot find PMU `%s'. Missing kernel support?",
1254 name) < 0)
1255 err->str = NULL;
1256 return -EINVAL;
1257 }
1258
1259 if (pmu->default_config) {
1260 memcpy(&attr, pmu->default_config,
1261 sizeof(struct perf_event_attr));
1262 } else {
1263 memset(&attr, 0, sizeof(attr));
1264 }
1265
1266 use_uncore_alias = (pmu->is_uncore && use_alias);
1267
1268 if (!head_config) {
1269 attr.type = pmu->type;
1270 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats);
1271 if (evsel) {
1272 evsel->pmu_name = name;
1273 evsel->use_uncore_alias = use_uncore_alias;
1274 return 0;
1275 } else {
1276 return -ENOMEM;
1277 }
1278 }
1279
1280 if (perf_pmu__check_alias(pmu, head_config, &info))
1281 return -EINVAL;
1282
1283 /*
1284 * Configure hardcoded terms first, no need to check
1285 * return value when called with fail == 0 ;)
1286 */
1287 if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1288 return -EINVAL;
1289
1290 if (get_config_terms(head_config, &config_terms))
1291 return -ENOMEM;
1292
1293 if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1294 return -EINVAL;
1295
1296 evsel = __add_event(list, &parse_state->idx, &attr,
1297 get_config_name(head_config), pmu,
1298 &config_terms, auto_merge_stats);
1299 if (evsel) {
1300 evsel->unit = info.unit;
1301 evsel->scale = info.scale;
1302 evsel->per_pkg = info.per_pkg;
1303 evsel->snapshot = info.snapshot;
1304 evsel->metric_expr = info.metric_expr;
1305 evsel->metric_name = info.metric_name;
1306 evsel->pmu_name = name;
1307 evsel->use_uncore_alias = use_uncore_alias;
1308 }
1309
1310 return evsel ? 0 : -ENOMEM;
1311 }
1312
1313 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1314 char *str, struct list_head **listp)
1315 {
1316 struct list_head *head;
1317 struct parse_events_term *term;
1318 struct list_head *list;
1319 struct perf_pmu *pmu = NULL;
1320 int ok = 0;
1321
1322 *listp = NULL;
1323 /* Add it for all PMUs that support the alias */
1324 list = malloc(sizeof(struct list_head));
1325 if (!list)
1326 return -1;
1327 INIT_LIST_HEAD(list);
1328 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1329 struct perf_pmu_alias *alias;
1330
1331 list_for_each_entry(alias, &pmu->aliases, list) {
1332 if (!strcasecmp(alias->name, str)) {
1333 head = malloc(sizeof(struct list_head));
1334 if (!head)
1335 return -1;
1336 INIT_LIST_HEAD(head);
1337 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1338 str, 1, false, &str, NULL) < 0)
1339 return -1;
1340 list_add_tail(&term->list, head);
1341
1342 if (!parse_events_add_pmu(parse_state, list,
1343 pmu->name, head,
1344 true, true)) {
1345 pr_debug("%s -> %s/%s/\n", str,
1346 pmu->name, alias->str);
1347 ok++;
1348 }
1349
1350 parse_events_terms__delete(head);
1351 }
1352 }
1353 }
1354 if (!ok)
1355 return -1;
1356 *listp = list;
1357 return 0;
1358 }
1359
1360 int parse_events__modifier_group(struct list_head *list,
1361 char *event_mod)
1362 {
1363 return parse_events__modifier_event(list, event_mod, true);
1364 }
1365
1366 /*
1367 * Check if the two uncore PMUs are from the same uncore block
1368 * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1369 */
1370 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1371 {
1372 char *end_a, *end_b;
1373
1374 end_a = strrchr(pmu_name_a, '_');
1375 end_b = strrchr(pmu_name_b, '_');
1376
1377 if (!end_a || !end_b)
1378 return false;
1379
1380 if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1381 return false;
1382
1383 return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1384 }
1385
1386 static int
1387 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1388 struct parse_events_state *parse_state)
1389 {
1390 struct perf_evsel *evsel, *leader;
1391 uintptr_t *leaders;
1392 bool is_leader = true;
1393 int i, nr_pmu = 0, total_members, ret = 0;
1394
1395 leader = list_first_entry(list, struct perf_evsel, node);
1396 evsel = list_last_entry(list, struct perf_evsel, node);
1397 total_members = evsel->idx - leader->idx + 1;
1398
1399 leaders = calloc(total_members, sizeof(uintptr_t));
1400 if (WARN_ON(!leaders))
1401 return 0;
1402
1403 /*
1404 * Going through the whole group and doing sanity check.
1405 * All members must use alias, and be from the same uncore block.
1406 * Also, storing the leader events in an array.
1407 */
1408 __evlist__for_each_entry(list, evsel) {
1409
1410 /* Only split the uncore group which members use alias */
1411 if (!evsel->use_uncore_alias)
1412 goto out;
1413
1414 /* The events must be from the same uncore block */
1415 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1416 goto out;
1417
1418 if (!is_leader)
1419 continue;
1420 /*
1421 * If the event's PMU name starts to repeat, it must be a new
1422 * event. That can be used to distinguish the leader from
1423 * other members, even they have the same event name.
1424 */
1425 if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
1426 is_leader = false;
1427 continue;
1428 }
1429 /* The name is always alias name */
1430 WARN_ON(strcmp(leader->name, evsel->name));
1431
1432 /* Store the leader event for each PMU */
1433 leaders[nr_pmu++] = (uintptr_t) evsel;
1434 }
1435
1436 /* only one event alias */
1437 if (nr_pmu == total_members) {
1438 parse_state->nr_groups--;
1439 goto handled;
1440 }
1441
1442 /*
1443 * An uncore event alias is a joint name which means the same event
1444 * runs on all PMUs of a block.
1445 * Perf doesn't support mixed events from different PMUs in the same
1446 * group. The big group has to be split into multiple small groups
1447 * which only include the events from the same PMU.
1448 *
1449 * Here the uncore event aliases must be from the same uncore block.
1450 * The number of PMUs must be same for each alias. The number of new
1451 * small groups equals to the number of PMUs.
1452 * Setting the leader event for corresponding members in each group.
1453 */
1454 i = 0;
1455 __evlist__for_each_entry(list, evsel) {
1456 if (i >= nr_pmu)
1457 i = 0;
1458 evsel->leader = (struct perf_evsel *) leaders[i++];
1459 }
1460
1461 /* The number of members and group name are same for each group */
1462 for (i = 0; i < nr_pmu; i++) {
1463 evsel = (struct perf_evsel *) leaders[i];
1464 evsel->nr_members = total_members / nr_pmu;
1465 evsel->group_name = name ? strdup(name) : NULL;
1466 }
1467
1468 /* Take the new small groups into account */
1469 parse_state->nr_groups += nr_pmu - 1;
1470
1471 handled:
1472 ret = 1;
1473 out:
1474 free(leaders);
1475 return ret;
1476 }
1477
1478 void parse_events__set_leader(char *name, struct list_head *list,
1479 struct parse_events_state *parse_state)
1480 {
1481 struct perf_evsel *leader;
1482
1483 if (list_empty(list)) {
1484 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1485 return;
1486 }
1487
1488 if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1489 return;
1490
1491 __perf_evlist__set_leader(list);
1492 leader = list_entry(list->next, struct perf_evsel, node);
1493 leader->group_name = name ? strdup(name) : NULL;
1494 }
1495
1496 /* list_event is assumed to point to malloc'ed memory */
1497 void parse_events_update_lists(struct list_head *list_event,
1498 struct list_head *list_all)
1499 {
1500 /*
1501 * Called for single event definition. Update the
1502 * 'all event' list, and reinit the 'single event'
1503 * list, for next event definition.
1504 */
1505 list_splice_tail(list_event, list_all);
1506 free(list_event);
1507 }
1508
1509 struct event_modifier {
1510 int eu;
1511 int ek;
1512 int eh;
1513 int eH;
1514 int eG;
1515 int eI;
1516 int precise;
1517 int precise_max;
1518 int exclude_GH;
1519 int sample_read;
1520 int pinned;
1521 int weak;
1522 };
1523
1524 static int get_event_modifier(struct event_modifier *mod, char *str,
1525 struct perf_evsel *evsel)
1526 {
1527 int eu = evsel ? evsel->attr.exclude_user : 0;
1528 int ek = evsel ? evsel->attr.exclude_kernel : 0;
1529 int eh = evsel ? evsel->attr.exclude_hv : 0;
1530 int eH = evsel ? evsel->attr.exclude_host : 0;
1531 int eG = evsel ? evsel->attr.exclude_guest : 0;
1532 int eI = evsel ? evsel->attr.exclude_idle : 0;
1533 int precise = evsel ? evsel->attr.precise_ip : 0;
1534 int precise_max = 0;
1535 int sample_read = 0;
1536 int pinned = evsel ? evsel->attr.pinned : 0;
1537
1538 int exclude = eu | ek | eh;
1539 int exclude_GH = evsel ? evsel->exclude_GH : 0;
1540 int weak = 0;
1541
1542 memset(mod, 0, sizeof(*mod));
1543
1544 while (*str) {
1545 if (*str == 'u') {
1546 if (!exclude)
1547 exclude = eu = ek = eh = 1;
1548 eu = 0;
1549 } else if (*str == 'k') {
1550 if (!exclude)
1551 exclude = eu = ek = eh = 1;
1552 ek = 0;
1553 } else if (*str == 'h') {
1554 if (!exclude)
1555 exclude = eu = ek = eh = 1;
1556 eh = 0;
1557 } else if (*str == 'G') {
1558 if (!exclude_GH)
1559 exclude_GH = eG = eH = 1;
1560 eG = 0;
1561 } else if (*str == 'H') {
1562 if (!exclude_GH)
1563 exclude_GH = eG = eH = 1;
1564 eH = 0;
1565 } else if (*str == 'I') {
1566 eI = 1;
1567 } else if (*str == 'p') {
1568 precise++;
1569 /* use of precise requires exclude_guest */
1570 if (!exclude_GH)
1571 eG = 1;
1572 } else if (*str == 'P') {
1573 precise_max = 1;
1574 } else if (*str == 'S') {
1575 sample_read = 1;
1576 } else if (*str == 'D') {
1577 pinned = 1;
1578 } else if (*str == 'W') {
1579 weak = 1;
1580 } else
1581 break;
1582
1583 ++str;
1584 }
1585
1586 /*
1587 * precise ip:
1588 *
1589 * 0 - SAMPLE_IP can have arbitrary skid
1590 * 1 - SAMPLE_IP must have constant skid
1591 * 2 - SAMPLE_IP requested to have 0 skid
1592 * 3 - SAMPLE_IP must have 0 skid
1593 *
1594 * See also PERF_RECORD_MISC_EXACT_IP
1595 */
1596 if (precise > 3)
1597 return -EINVAL;
1598
1599 mod->eu = eu;
1600 mod->ek = ek;
1601 mod->eh = eh;
1602 mod->eH = eH;
1603 mod->eG = eG;
1604 mod->eI = eI;
1605 mod->precise = precise;
1606 mod->precise_max = precise_max;
1607 mod->exclude_GH = exclude_GH;
1608 mod->sample_read = sample_read;
1609 mod->pinned = pinned;
1610 mod->weak = weak;
1611
1612 return 0;
1613 }
1614
1615 /*
1616 * Basic modifier sanity check to validate it contains only one
1617 * instance of any modifier (apart from 'p') present.
1618 */
1619 static int check_modifier(char *str)
1620 {
1621 char *p = str;
1622
1623 /* The sizeof includes 0 byte as well. */
1624 if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1625 return -1;
1626
1627 while (*p) {
1628 if (*p != 'p' && strchr(p + 1, *p))
1629 return -1;
1630 p++;
1631 }
1632
1633 return 0;
1634 }
1635
1636 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1637 {
1638 struct perf_evsel *evsel;
1639 struct event_modifier mod;
1640
1641 if (str == NULL)
1642 return 0;
1643
1644 if (check_modifier(str))
1645 return -EINVAL;
1646
1647 if (!add && get_event_modifier(&mod, str, NULL))
1648 return -EINVAL;
1649
1650 __evlist__for_each_entry(list, evsel) {
1651 if (add && get_event_modifier(&mod, str, evsel))
1652 return -EINVAL;
1653
1654 evsel->attr.exclude_user = mod.eu;
1655 evsel->attr.exclude_kernel = mod.ek;
1656 evsel->attr.exclude_hv = mod.eh;
1657 evsel->attr.precise_ip = mod.precise;
1658 evsel->attr.exclude_host = mod.eH;
1659 evsel->attr.exclude_guest = mod.eG;
1660 evsel->attr.exclude_idle = mod.eI;
1661 evsel->exclude_GH = mod.exclude_GH;
1662 evsel->sample_read = mod.sample_read;
1663 evsel->precise_max = mod.precise_max;
1664 evsel->weak_group = mod.weak;
1665
1666 if (perf_evsel__is_group_leader(evsel))
1667 evsel->attr.pinned = mod.pinned;
1668 }
1669
1670 return 0;
1671 }
1672
1673 int parse_events_name(struct list_head *list, char *name)
1674 {
1675 struct perf_evsel *evsel;
1676
1677 __evlist__for_each_entry(list, evsel) {
1678 if (!evsel->name)
1679 evsel->name = strdup(name);
1680 }
1681
1682 return 0;
1683 }
1684
1685 static int
1686 comp_pmu(const void *p1, const void *p2)
1687 {
1688 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1689 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1690
1691 return strcasecmp(pmu1->symbol, pmu2->symbol);
1692 }
1693
1694 static void perf_pmu__parse_cleanup(void)
1695 {
1696 if (perf_pmu_events_list_num > 0) {
1697 struct perf_pmu_event_symbol *p;
1698 int i;
1699
1700 for (i = 0; i < perf_pmu_events_list_num; i++) {
1701 p = perf_pmu_events_list + i;
1702 zfree(&p->symbol);
1703 }
1704 zfree(&perf_pmu_events_list);
1705 perf_pmu_events_list_num = 0;
1706 }
1707 }
1708
1709 #define SET_SYMBOL(str, stype) \
1710 do { \
1711 p->symbol = str; \
1712 if (!p->symbol) \
1713 goto err; \
1714 p->type = stype; \
1715 } while (0)
1716
1717 /*
1718 * Read the pmu events list from sysfs
1719 * Save it into perf_pmu_events_list
1720 */
1721 static void perf_pmu__parse_init(void)
1722 {
1723
1724 struct perf_pmu *pmu = NULL;
1725 struct perf_pmu_alias *alias;
1726 int len = 0;
1727
1728 pmu = NULL;
1729 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1730 list_for_each_entry(alias, &pmu->aliases, list) {
1731 if (strchr(alias->name, '-'))
1732 len++;
1733 len++;
1734 }
1735 }
1736
1737 if (len == 0) {
1738 perf_pmu_events_list_num = -1;
1739 return;
1740 }
1741 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1742 if (!perf_pmu_events_list)
1743 return;
1744 perf_pmu_events_list_num = len;
1745
1746 len = 0;
1747 pmu = NULL;
1748 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1749 list_for_each_entry(alias, &pmu->aliases, list) {
1750 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1751 char *tmp = strchr(alias->name, '-');
1752
1753 if (tmp != NULL) {
1754 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1755 PMU_EVENT_SYMBOL_PREFIX);
1756 p++;
1757 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1758 len += 2;
1759 } else {
1760 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1761 len++;
1762 }
1763 }
1764 }
1765 qsort(perf_pmu_events_list, len,
1766 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1767
1768 return;
1769 err:
1770 perf_pmu__parse_cleanup();
1771 }
1772
1773 enum perf_pmu_event_symbol_type
1774 perf_pmu__parse_check(const char *name)
1775 {
1776 struct perf_pmu_event_symbol p, *r;
1777
1778 /* scan kernel pmu events from sysfs if needed */
1779 if (perf_pmu_events_list_num == 0)
1780 perf_pmu__parse_init();
1781 /*
1782 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1783 * cpu-cycles has been handled by hardcode.
1784 * So it must be cpu// events, not kernel pmu event.
1785 */
1786 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1787 return PMU_EVENT_SYMBOL_ERR;
1788
1789 p.symbol = strdup(name);
1790 r = bsearch(&p, perf_pmu_events_list,
1791 (size_t) perf_pmu_events_list_num,
1792 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1793 zfree(&p.symbol);
1794 return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1795 }
1796
1797 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1798 {
1799 YY_BUFFER_STATE buffer;
1800 void *scanner;
1801 int ret;
1802
1803 ret = parse_events_lex_init_extra(start_token, &scanner);
1804 if (ret)
1805 return ret;
1806
1807 buffer = parse_events__scan_string(str, scanner);
1808
1809 #ifdef PARSER_DEBUG
1810 parse_events_debug = 1;
1811 #endif
1812 ret = parse_events_parse(parse_state, scanner);
1813
1814 parse_events__flush_buffer(buffer, scanner);
1815 parse_events__delete_buffer(buffer, scanner);
1816 parse_events_lex_destroy(scanner);
1817 return ret;
1818 }
1819
1820 /*
1821 * parse event config string, return a list of event terms.
1822 */
1823 int parse_events_terms(struct list_head *terms, const char *str)
1824 {
1825 struct parse_events_state parse_state = {
1826 .terms = NULL,
1827 };
1828 int ret;
1829
1830 ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1831 if (!ret) {
1832 list_splice(parse_state.terms, terms);
1833 zfree(&parse_state.terms);
1834 return 0;
1835 }
1836
1837 parse_events_terms__delete(parse_state.terms);
1838 return ret;
1839 }
1840
1841 int parse_events(struct perf_evlist *evlist, const char *str,
1842 struct parse_events_error *err)
1843 {
1844 struct parse_events_state parse_state = {
1845 .list = LIST_HEAD_INIT(parse_state.list),
1846 .idx = evlist->nr_entries,
1847 .error = err,
1848 .evlist = evlist,
1849 };
1850 int ret;
1851
1852 ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1853 perf_pmu__parse_cleanup();
1854 if (!ret) {
1855 struct perf_evsel *last;
1856
1857 if (list_empty(&parse_state.list)) {
1858 WARN_ONCE(true, "WARNING: event parser found nothing\n");
1859 return -1;
1860 }
1861
1862 perf_evlist__splice_list_tail(evlist, &parse_state.list);
1863 evlist->nr_groups += parse_state.nr_groups;
1864 last = perf_evlist__last(evlist);
1865 last->cmdline_group_boundary = true;
1866
1867 return 0;
1868 }
1869
1870 /*
1871 * There are 2 users - builtin-record and builtin-test objects.
1872 * Both call perf_evlist__delete in case of error, so we dont
1873 * need to bother.
1874 */
1875 return ret;
1876 }
1877
1878 #define MAX_WIDTH 1000
1879 static int get_term_width(void)
1880 {
1881 struct winsize ws;
1882
1883 get_term_dimensions(&ws);
1884 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1885 }
1886
1887 void parse_events_print_error(struct parse_events_error *err,
1888 const char *event)
1889 {
1890 const char *str = "invalid or unsupported event: ";
1891 char _buf[MAX_WIDTH];
1892 char *buf = (char *) event;
1893 int idx = 0;
1894
1895 if (err->str) {
1896 /* -2 for extra '' in the final fprintf */
1897 int width = get_term_width() - 2;
1898 int len_event = strlen(event);
1899 int len_str, max_len, cut = 0;
1900
1901 /*
1902 * Maximum error index indent, we will cut
1903 * the event string if it's bigger.
1904 */
1905 int max_err_idx = 13;
1906
1907 /*
1908 * Let's be specific with the message when
1909 * we have the precise error.
1910 */
1911 str = "event syntax error: ";
1912 len_str = strlen(str);
1913 max_len = width - len_str;
1914
1915 buf = _buf;
1916
1917 /* We're cutting from the beginning. */
1918 if (err->idx > max_err_idx)
1919 cut = err->idx - max_err_idx;
1920
1921 strncpy(buf, event + cut, max_len);
1922
1923 /* Mark cut parts with '..' on both sides. */
1924 if (cut)
1925 buf[0] = buf[1] = '.';
1926
1927 if ((len_event - cut) > max_len) {
1928 buf[max_len - 1] = buf[max_len - 2] = '.';
1929 buf[max_len] = 0;
1930 }
1931
1932 idx = len_str + err->idx - cut;
1933 }
1934
1935 fprintf(stderr, "%s'%s'\n", str, buf);
1936 if (idx) {
1937 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1938 if (err->help)
1939 fprintf(stderr, "\n%s\n", err->help);
1940 zfree(&err->str);
1941 zfree(&err->help);
1942 }
1943 }
1944
1945 #undef MAX_WIDTH
1946
1947 int parse_events_option(const struct option *opt, const char *str,
1948 int unset __maybe_unused)
1949 {
1950 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1951 struct parse_events_error err = { .idx = 0, };
1952 int ret = parse_events(evlist, str, &err);
1953
1954 if (ret) {
1955 parse_events_print_error(&err, str);
1956 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1957 }
1958
1959 return ret;
1960 }
1961
1962 static int
1963 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1964 int (*func)(struct perf_evsel *evsel,
1965 const void *arg),
1966 const void *arg)
1967 {
1968 struct perf_evsel *last = NULL;
1969 int err;
1970
1971 /*
1972 * Don't return when list_empty, give func a chance to report
1973 * error when it found last == NULL.
1974 *
1975 * So no need to WARN here, let *func do this.
1976 */
1977 if (evlist->nr_entries > 0)
1978 last = perf_evlist__last(evlist);
1979
1980 do {
1981 err = (*func)(last, arg);
1982 if (err)
1983 return -1;
1984 if (!last)
1985 return 0;
1986
1987 if (last->node.prev == &evlist->entries)
1988 return 0;
1989 last = list_entry(last->node.prev, struct perf_evsel, node);
1990 } while (!last->cmdline_group_boundary);
1991
1992 return 0;
1993 }
1994
1995 static int set_filter(struct perf_evsel *evsel, const void *arg)
1996 {
1997 const char *str = arg;
1998 bool found = false;
1999 int nr_addr_filters = 0;
2000 struct perf_pmu *pmu = NULL;
2001
2002 if (evsel == NULL) {
2003 fprintf(stderr,
2004 "--filter option should follow a -e tracepoint or HW tracer option\n");
2005 return -1;
2006 }
2007
2008 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
2009 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
2010 fprintf(stderr,
2011 "not enough memory to hold filter string\n");
2012 return -1;
2013 }
2014
2015 return 0;
2016 }
2017
2018 while ((pmu = perf_pmu__scan(pmu)) != NULL)
2019 if (pmu->type == evsel->attr.type) {
2020 found = true;
2021 break;
2022 }
2023
2024 if (found)
2025 perf_pmu__scan_file(pmu, "nr_addr_filters",
2026 "%d", &nr_addr_filters);
2027
2028 if (!nr_addr_filters) {
2029 fprintf(stderr,
2030 "This CPU does not support address filtering\n");
2031 return -1;
2032 }
2033
2034 if (perf_evsel__append_addr_filter(evsel, str) < 0) {
2035 fprintf(stderr,
2036 "not enough memory to hold filter string\n");
2037 return -1;
2038 }
2039
2040 return 0;
2041 }
2042
2043 int parse_filter(const struct option *opt, const char *str,
2044 int unset __maybe_unused)
2045 {
2046 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
2047
2048 return foreach_evsel_in_last_glob(evlist, set_filter,
2049 (const void *)str);
2050 }
2051
2052 static int add_exclude_perf_filter(struct perf_evsel *evsel,
2053 const void *arg __maybe_unused)
2054 {
2055 char new_filter[64];
2056
2057 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
2058 fprintf(stderr,
2059 "--exclude-perf option should follow a -e tracepoint option\n");
2060 return -1;
2061 }
2062
2063 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2064
2065 if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
2066 fprintf(stderr,
2067 "not enough memory to hold filter string\n");
2068 return -1;
2069 }
2070
2071 return 0;
2072 }
2073
2074 int exclude_perf(const struct option *opt,
2075 const char *arg __maybe_unused,
2076 int unset __maybe_unused)
2077 {
2078 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
2079
2080 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2081 NULL);
2082 }
2083
2084 static const char * const event_type_descriptors[] = {
2085 "Hardware event",
2086 "Software event",
2087 "Tracepoint event",
2088 "Hardware cache event",
2089 "Raw hardware event descriptor",
2090 "Hardware breakpoint",
2091 };
2092
2093 static int cmp_string(const void *a, const void *b)
2094 {
2095 const char * const *as = a;
2096 const char * const *bs = b;
2097
2098 return strcmp(*as, *bs);
2099 }
2100
2101 /*
2102 * Print the events from <debugfs_mount_point>/tracing/events
2103 */
2104
2105 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2106 bool name_only)
2107 {
2108 DIR *sys_dir, *evt_dir;
2109 struct dirent *sys_dirent, *evt_dirent;
2110 char evt_path[MAXPATHLEN];
2111 char *dir_path;
2112 char **evt_list = NULL;
2113 unsigned int evt_i = 0, evt_num = 0;
2114 bool evt_num_known = false;
2115
2116 restart:
2117 sys_dir = tracing_events__opendir();
2118 if (!sys_dir)
2119 return;
2120
2121 if (evt_num_known) {
2122 evt_list = zalloc(sizeof(char *) * evt_num);
2123 if (!evt_list)
2124 goto out_close_sys_dir;
2125 }
2126
2127 for_each_subsystem(sys_dir, sys_dirent) {
2128 if (subsys_glob != NULL &&
2129 !strglobmatch(sys_dirent->d_name, subsys_glob))
2130 continue;
2131
2132 dir_path = get_events_file(sys_dirent->d_name);
2133 if (!dir_path)
2134 continue;
2135 evt_dir = opendir(dir_path);
2136 if (!evt_dir)
2137 goto next;
2138
2139 for_each_event(dir_path, evt_dir, evt_dirent) {
2140 if (event_glob != NULL &&
2141 !strglobmatch(evt_dirent->d_name, event_glob))
2142 continue;
2143
2144 if (!evt_num_known) {
2145 evt_num++;
2146 continue;
2147 }
2148
2149 snprintf(evt_path, MAXPATHLEN, "%s:%s",
2150 sys_dirent->d_name, evt_dirent->d_name);
2151
2152 evt_list[evt_i] = strdup(evt_path);
2153 if (evt_list[evt_i] == NULL) {
2154 put_events_file(dir_path);
2155 goto out_close_evt_dir;
2156 }
2157 evt_i++;
2158 }
2159 closedir(evt_dir);
2160 next:
2161 put_events_file(dir_path);
2162 }
2163 closedir(sys_dir);
2164
2165 if (!evt_num_known) {
2166 evt_num_known = true;
2167 goto restart;
2168 }
2169 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2170 evt_i = 0;
2171 while (evt_i < evt_num) {
2172 if (name_only) {
2173 printf("%s ", evt_list[evt_i++]);
2174 continue;
2175 }
2176 printf(" %-50s [%s]\n", evt_list[evt_i++],
2177 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2178 }
2179 if (evt_num && pager_in_use())
2180 printf("\n");
2181
2182 out_free:
2183 evt_num = evt_i;
2184 for (evt_i = 0; evt_i < evt_num; evt_i++)
2185 zfree(&evt_list[evt_i]);
2186 zfree(&evt_list);
2187 return;
2188
2189 out_close_evt_dir:
2190 closedir(evt_dir);
2191 out_close_sys_dir:
2192 closedir(sys_dir);
2193
2194 printf("FATAL: not enough memory to print %s\n",
2195 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2196 if (evt_list)
2197 goto out_free;
2198 }
2199
2200 /*
2201 * Check whether event is in <debugfs_mount_point>/tracing/events
2202 */
2203
2204 int is_valid_tracepoint(const char *event_string)
2205 {
2206 DIR *sys_dir, *evt_dir;
2207 struct dirent *sys_dirent, *evt_dirent;
2208 char evt_path[MAXPATHLEN];
2209 char *dir_path;
2210
2211 sys_dir = tracing_events__opendir();
2212 if (!sys_dir)
2213 return 0;
2214
2215 for_each_subsystem(sys_dir, sys_dirent) {
2216 dir_path = get_events_file(sys_dirent->d_name);
2217 if (!dir_path)
2218 continue;
2219 evt_dir = opendir(dir_path);
2220 if (!evt_dir)
2221 goto next;
2222
2223 for_each_event(dir_path, evt_dir, evt_dirent) {
2224 snprintf(evt_path, MAXPATHLEN, "%s:%s",
2225 sys_dirent->d_name, evt_dirent->d_name);
2226 if (!strcmp(evt_path, event_string)) {
2227 closedir(evt_dir);
2228 closedir(sys_dir);
2229 return 1;
2230 }
2231 }
2232 closedir(evt_dir);
2233 next:
2234 put_events_file(dir_path);
2235 }
2236 closedir(sys_dir);
2237 return 0;
2238 }
2239
2240 static bool is_event_supported(u8 type, unsigned config)
2241 {
2242 bool ret = true;
2243 int open_return;
2244 struct perf_evsel *evsel;
2245 struct perf_event_attr attr = {
2246 .type = type,
2247 .config = config,
2248 .disabled = 1,
2249 };
2250 struct thread_map *tmap = thread_map__new_by_tid(0);
2251
2252 if (tmap == NULL)
2253 return false;
2254
2255 evsel = perf_evsel__new(&attr);
2256 if (evsel) {
2257 open_return = perf_evsel__open(evsel, NULL, tmap);
2258 ret = open_return >= 0;
2259
2260 if (open_return == -EACCES) {
2261 /*
2262 * This happens if the paranoid value
2263 * /proc/sys/kernel/perf_event_paranoid is set to 2
2264 * Re-run with exclude_kernel set; we don't do that
2265 * by default as some ARM machines do not support it.
2266 *
2267 */
2268 evsel->attr.exclude_kernel = 1;
2269 ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2270 }
2271 perf_evsel__delete(evsel);
2272 }
2273
2274 thread_map__put(tmap);
2275 return ret;
2276 }
2277
2278 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2279 bool name_only)
2280 {
2281 struct probe_cache *pcache;
2282 struct probe_cache_entry *ent;
2283 struct strlist *bidlist, *sdtlist;
2284 struct strlist_config cfg = {.dont_dupstr = true};
2285 struct str_node *nd, *nd2;
2286 char *buf, *path, *ptr = NULL;
2287 bool show_detail = false;
2288 int ret;
2289
2290 sdtlist = strlist__new(NULL, &cfg);
2291 if (!sdtlist) {
2292 pr_debug("Failed to allocate new strlist for SDT\n");
2293 return;
2294 }
2295 bidlist = build_id_cache__list_all(true);
2296 if (!bidlist) {
2297 pr_debug("Failed to get buildids: %d\n", errno);
2298 return;
2299 }
2300 strlist__for_each_entry(nd, bidlist) {
2301 pcache = probe_cache__new(nd->s, NULL);
2302 if (!pcache)
2303 continue;
2304 list_for_each_entry(ent, &pcache->entries, node) {
2305 if (!ent->sdt)
2306 continue;
2307 if (subsys_glob &&
2308 !strglobmatch(ent->pev.group, subsys_glob))
2309 continue;
2310 if (event_glob &&
2311 !strglobmatch(ent->pev.event, event_glob))
2312 continue;
2313 ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2314 ent->pev.event, nd->s);
2315 if (ret > 0)
2316 strlist__add(sdtlist, buf);
2317 }
2318 probe_cache__delete(pcache);
2319 }
2320 strlist__delete(bidlist);
2321
2322 strlist__for_each_entry(nd, sdtlist) {
2323 buf = strchr(nd->s, '@');
2324 if (buf)
2325 *(buf++) = '\0';
2326 if (name_only) {
2327 printf("%s ", nd->s);
2328 continue;
2329 }
2330 nd2 = strlist__next(nd);
2331 if (nd2) {
2332 ptr = strchr(nd2->s, '@');
2333 if (ptr)
2334 *ptr = '\0';
2335 if (strcmp(nd->s, nd2->s) == 0)
2336 show_detail = true;
2337 }
2338 if (show_detail) {
2339 path = build_id_cache__origname(buf);
2340 ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2341 if (ret > 0) {
2342 printf(" %-50s [%s]\n", buf, "SDT event");
2343 free(buf);
2344 }
2345 free(path);
2346 } else
2347 printf(" %-50s [%s]\n", nd->s, "SDT event");
2348 if (nd2) {
2349 if (strcmp(nd->s, nd2->s) != 0)
2350 show_detail = false;
2351 if (ptr)
2352 *ptr = '@';
2353 }
2354 }
2355 strlist__delete(sdtlist);
2356 }
2357
2358 int print_hwcache_events(const char *event_glob, bool name_only)
2359 {
2360 unsigned int type, op, i, evt_i = 0, evt_num = 0;
2361 char name[64];
2362 char **evt_list = NULL;
2363 bool evt_num_known = false;
2364
2365 restart:
2366 if (evt_num_known) {
2367 evt_list = zalloc(sizeof(char *) * evt_num);
2368 if (!evt_list)
2369 goto out_enomem;
2370 }
2371
2372 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2373 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2374 /* skip invalid cache type */
2375 if (!perf_evsel__is_cache_op_valid(type, op))
2376 continue;
2377
2378 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2379 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2380 name, sizeof(name));
2381 if (event_glob != NULL && !strglobmatch(name, event_glob))
2382 continue;
2383
2384 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2385 type | (op << 8) | (i << 16)))
2386 continue;
2387
2388 if (!evt_num_known) {
2389 evt_num++;
2390 continue;
2391 }
2392
2393 evt_list[evt_i] = strdup(name);
2394 if (evt_list[evt_i] == NULL)
2395 goto out_enomem;
2396 evt_i++;
2397 }
2398 }
2399 }
2400
2401 if (!evt_num_known) {
2402 evt_num_known = true;
2403 goto restart;
2404 }
2405 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2406 evt_i = 0;
2407 while (evt_i < evt_num) {
2408 if (name_only) {
2409 printf("%s ", evt_list[evt_i++]);
2410 continue;
2411 }
2412 printf(" %-50s [%s]\n", evt_list[evt_i++],
2413 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2414 }
2415 if (evt_num && pager_in_use())
2416 printf("\n");
2417
2418 out_free:
2419 evt_num = evt_i;
2420 for (evt_i = 0; evt_i < evt_num; evt_i++)
2421 zfree(&evt_list[evt_i]);
2422 zfree(&evt_list);
2423 return evt_num;
2424
2425 out_enomem:
2426 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2427 if (evt_list)
2428 goto out_free;
2429 return evt_num;
2430 }
2431
2432 void print_symbol_events(const char *event_glob, unsigned type,
2433 struct event_symbol *syms, unsigned max,
2434 bool name_only)
2435 {
2436 unsigned int i, evt_i = 0, evt_num = 0;
2437 char name[MAX_NAME_LEN];
2438 char **evt_list = NULL;
2439 bool evt_num_known = false;
2440
2441 restart:
2442 if (evt_num_known) {
2443 evt_list = zalloc(sizeof(char *) * evt_num);
2444 if (!evt_list)
2445 goto out_enomem;
2446 syms -= max;
2447 }
2448
2449 for (i = 0; i < max; i++, syms++) {
2450
2451 if (event_glob != NULL && syms->symbol != NULL &&
2452 !(strglobmatch(syms->symbol, event_glob) ||
2453 (syms->alias && strglobmatch(syms->alias, event_glob))))
2454 continue;
2455
2456 if (!is_event_supported(type, i))
2457 continue;
2458
2459 if (!evt_num_known) {
2460 evt_num++;
2461 continue;
2462 }
2463
2464 if (!name_only && strlen(syms->alias))
2465 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2466 else
2467 strlcpy(name, syms->symbol, MAX_NAME_LEN);
2468
2469 evt_list[evt_i] = strdup(name);
2470 if (evt_list[evt_i] == NULL)
2471 goto out_enomem;
2472 evt_i++;
2473 }
2474
2475 if (!evt_num_known) {
2476 evt_num_known = true;
2477 goto restart;
2478 }
2479 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2480 evt_i = 0;
2481 while (evt_i < evt_num) {
2482 if (name_only) {
2483 printf("%s ", evt_list[evt_i++]);
2484 continue;
2485 }
2486 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2487 }
2488 if (evt_num && pager_in_use())
2489 printf("\n");
2490
2491 out_free:
2492 evt_num = evt_i;
2493 for (evt_i = 0; evt_i < evt_num; evt_i++)
2494 zfree(&evt_list[evt_i]);
2495 zfree(&evt_list);
2496 return;
2497
2498 out_enomem:
2499 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2500 if (evt_list)
2501 goto out_free;
2502 }
2503
2504 /*
2505 * Print the help text for the event symbols:
2506 */
2507 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2508 bool long_desc, bool details_flag)
2509 {
2510 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2511 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2512
2513 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2514 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2515
2516 print_hwcache_events(event_glob, name_only);
2517
2518 print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2519 details_flag);
2520
2521 if (event_glob != NULL)
2522 return;
2523
2524 if (!name_only) {
2525 printf(" %-50s [%s]\n",
2526 "rNNN",
2527 event_type_descriptors[PERF_TYPE_RAW]);
2528 printf(" %-50s [%s]\n",
2529 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2530 event_type_descriptors[PERF_TYPE_RAW]);
2531 if (pager_in_use())
2532 printf(" (see 'man perf-list' on how to encode it)\n\n");
2533
2534 printf(" %-50s [%s]\n",
2535 "mem:<addr>[/len][:access]",
2536 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2537 if (pager_in_use())
2538 printf("\n");
2539 }
2540
2541 print_tracepoint_events(NULL, NULL, name_only);
2542
2543 print_sdt_events(NULL, NULL, name_only);
2544
2545 metricgroup__print(true, true, NULL, name_only, details_flag);
2546 }
2547
2548 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2549 {
2550 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2551 }
2552
2553 static int new_term(struct parse_events_term **_term,
2554 struct parse_events_term *temp,
2555 char *str, u64 num)
2556 {
2557 struct parse_events_term *term;
2558
2559 term = malloc(sizeof(*term));
2560 if (!term)
2561 return -ENOMEM;
2562
2563 *term = *temp;
2564 INIT_LIST_HEAD(&term->list);
2565 term->weak = false;
2566
2567 switch (term->type_val) {
2568 case PARSE_EVENTS__TERM_TYPE_NUM:
2569 term->val.num = num;
2570 break;
2571 case PARSE_EVENTS__TERM_TYPE_STR:
2572 term->val.str = str;
2573 break;
2574 default:
2575 free(term);
2576 return -EINVAL;
2577 }
2578
2579 *_term = term;
2580 return 0;
2581 }
2582
2583 int parse_events_term__num(struct parse_events_term **term,
2584 int type_term, char *config, u64 num,
2585 bool no_value,
2586 void *loc_term_, void *loc_val_)
2587 {
2588 YYLTYPE *loc_term = loc_term_;
2589 YYLTYPE *loc_val = loc_val_;
2590
2591 struct parse_events_term temp = {
2592 .type_val = PARSE_EVENTS__TERM_TYPE_NUM,
2593 .type_term = type_term,
2594 .config = config,
2595 .no_value = no_value,
2596 .err_term = loc_term ? loc_term->first_column : 0,
2597 .err_val = loc_val ? loc_val->first_column : 0,
2598 };
2599
2600 return new_term(term, &temp, NULL, num);
2601 }
2602
2603 int parse_events_term__str(struct parse_events_term **term,
2604 int type_term, char *config, char *str,
2605 void *loc_term_, void *loc_val_)
2606 {
2607 YYLTYPE *loc_term = loc_term_;
2608 YYLTYPE *loc_val = loc_val_;
2609
2610 struct parse_events_term temp = {
2611 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
2612 .type_term = type_term,
2613 .config = config,
2614 .err_term = loc_term ? loc_term->first_column : 0,
2615 .err_val = loc_val ? loc_val->first_column : 0,
2616 };
2617
2618 return new_term(term, &temp, str, 0);
2619 }
2620
2621 int parse_events_term__sym_hw(struct parse_events_term **term,
2622 char *config, unsigned idx)
2623 {
2624 struct event_symbol *sym;
2625 struct parse_events_term temp = {
2626 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
2627 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2628 .config = config ?: (char *) "event",
2629 };
2630
2631 BUG_ON(idx >= PERF_COUNT_HW_MAX);
2632 sym = &event_symbols_hw[idx];
2633
2634 return new_term(term, &temp, (char *) sym->symbol, 0);
2635 }
2636
2637 int parse_events_term__clone(struct parse_events_term **new,
2638 struct parse_events_term *term)
2639 {
2640 struct parse_events_term temp = {
2641 .type_val = term->type_val,
2642 .type_term = term->type_term,
2643 .config = term->config,
2644 .err_term = term->err_term,
2645 .err_val = term->err_val,
2646 };
2647
2648 return new_term(new, &temp, term->val.str, term->val.num);
2649 }
2650
2651 int parse_events_copy_term_list(struct list_head *old,
2652 struct list_head **new)
2653 {
2654 struct parse_events_term *term, *n;
2655 int ret;
2656
2657 if (!old) {
2658 *new = NULL;
2659 return 0;
2660 }
2661
2662 *new = malloc(sizeof(struct list_head));
2663 if (!*new)
2664 return -ENOMEM;
2665 INIT_LIST_HEAD(*new);
2666
2667 list_for_each_entry (term, old, list) {
2668 ret = parse_events_term__clone(&n, term);
2669 if (ret)
2670 return ret;
2671 list_add_tail(&n->list, *new);
2672 }
2673 return 0;
2674 }
2675
2676 void parse_events_terms__purge(struct list_head *terms)
2677 {
2678 struct parse_events_term *term, *h;
2679
2680 list_for_each_entry_safe(term, h, terms, list) {
2681 if (term->array.nr_ranges)
2682 zfree(&term->array.ranges);
2683 list_del_init(&term->list);
2684 free(term);
2685 }
2686 }
2687
2688 void parse_events_terms__delete(struct list_head *terms)
2689 {
2690 if (!terms)
2691 return;
2692 parse_events_terms__purge(terms);
2693 free(terms);
2694 }
2695
2696 void parse_events__clear_array(struct parse_events_array *a)
2697 {
2698 zfree(&a->ranges);
2699 }
2700
2701 void parse_events_evlist_error(struct parse_events_state *parse_state,
2702 int idx, const char *str)
2703 {
2704 struct parse_events_error *err = parse_state->error;
2705
2706 if (!err)
2707 return;
2708 err->idx = idx;
2709 err->str = strdup(str);
2710 WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2711 }
2712
2713 static void config_terms_list(char *buf, size_t buf_sz)
2714 {
2715 int i;
2716 bool first = true;
2717
2718 buf[0] = '\0';
2719 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2720 const char *name = config_term_names[i];
2721
2722 if (!config_term_avail(i, NULL))
2723 continue;
2724 if (!name)
2725 continue;
2726 if (name[0] == '<')
2727 continue;
2728
2729 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2730 return;
2731
2732 if (!first)
2733 strcat(buf, ",");
2734 else
2735 first = false;
2736 strcat(buf, name);
2737 }
2738 }
2739
2740 /*
2741 * Return string contains valid config terms of an event.
2742 * @additional_terms: For terms such as PMU sysfs terms.
2743 */
2744 char *parse_events_formats_error_string(char *additional_terms)
2745 {
2746 char *str;
2747 /* "no-overwrite" is the longest name */
2748 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2749 (sizeof("no-overwrite") - 1)];
2750
2751 config_terms_list(static_terms, sizeof(static_terms));
2752 /* valid terms */
2753 if (additional_terms) {
2754 if (asprintf(&str, "valid terms: %s,%s",
2755 additional_terms, static_terms) < 0)
2756 goto fail;
2757 } else {
2758 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2759 goto fail;
2760 }
2761 return str;
2762
2763 fail:
2764 return NULL;
2765 }
Linux with added FPC-III support