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Merge tag 'devicetree-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-artful-kernel.git] / tools / perf / util / parse-events.c
1 #include <linux/hw_breakpoint.h>
2 #include <linux/err.h>
3 #include <dirent.h>
4 #include <errno.h>
5 #include <sys/ioctl.h>
6 #include <sys/param.h>
7 #include "term.h"
8 #include "../perf.h"
9 #include "evlist.h"
10 #include "evsel.h"
11 #include <subcmd/parse-options.h>
12 #include "parse-events.h"
13 #include <subcmd/exec-cmd.h>
14 #include "string2.h"
15 #include "strlist.h"
16 #include "symbol.h"
17 #include "cache.h"
18 #include "header.h"
19 #include "bpf-loader.h"
20 #include "debug.h"
21 #include <api/fs/tracing_path.h>
22 #include "parse-events-bison.h"
23 #define YY_EXTRA_TYPE int
24 #include "parse-events-flex.h"
25 #include "pmu.h"
26 #include "thread_map.h"
27 #include "cpumap.h"
28 #include "probe-file.h"
29 #include "asm/bug.h"
30 #include "util/parse-branch-options.h"
31
32 #define MAX_NAME_LEN 100
33
34 #ifdef PARSER_DEBUG
35 extern int parse_events_debug;
36 #endif
37 int parse_events_parse(void *data, void *scanner);
38 static int get_config_terms(struct list_head *head_config,
39 struct list_head *head_terms __maybe_unused);
40
41 static struct perf_pmu_event_symbol *perf_pmu_events_list;
42 /*
43 * The variable indicates the number of supported pmu event symbols.
44 * 0 means not initialized and ready to init
45 * -1 means failed to init, don't try anymore
46 * >0 is the number of supported pmu event symbols
47 */
48 static int perf_pmu_events_list_num;
49
50 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
51 [PERF_COUNT_HW_CPU_CYCLES] = {
52 .symbol = "cpu-cycles",
53 .alias = "cycles",
54 },
55 [PERF_COUNT_HW_INSTRUCTIONS] = {
56 .symbol = "instructions",
57 .alias = "",
58 },
59 [PERF_COUNT_HW_CACHE_REFERENCES] = {
60 .symbol = "cache-references",
61 .alias = "",
62 },
63 [PERF_COUNT_HW_CACHE_MISSES] = {
64 .symbol = "cache-misses",
65 .alias = "",
66 },
67 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
68 .symbol = "branch-instructions",
69 .alias = "branches",
70 },
71 [PERF_COUNT_HW_BRANCH_MISSES] = {
72 .symbol = "branch-misses",
73 .alias = "",
74 },
75 [PERF_COUNT_HW_BUS_CYCLES] = {
76 .symbol = "bus-cycles",
77 .alias = "",
78 },
79 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
80 .symbol = "stalled-cycles-frontend",
81 .alias = "idle-cycles-frontend",
82 },
83 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
84 .symbol = "stalled-cycles-backend",
85 .alias = "idle-cycles-backend",
86 },
87 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
88 .symbol = "ref-cycles",
89 .alias = "",
90 },
91 };
92
93 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
94 [PERF_COUNT_SW_CPU_CLOCK] = {
95 .symbol = "cpu-clock",
96 .alias = "",
97 },
98 [PERF_COUNT_SW_TASK_CLOCK] = {
99 .symbol = "task-clock",
100 .alias = "",
101 },
102 [PERF_COUNT_SW_PAGE_FAULTS] = {
103 .symbol = "page-faults",
104 .alias = "faults",
105 },
106 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
107 .symbol = "context-switches",
108 .alias = "cs",
109 },
110 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
111 .symbol = "cpu-migrations",
112 .alias = "migrations",
113 },
114 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
115 .symbol = "minor-faults",
116 .alias = "",
117 },
118 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
119 .symbol = "major-faults",
120 .alias = "",
121 },
122 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
123 .symbol = "alignment-faults",
124 .alias = "",
125 },
126 [PERF_COUNT_SW_EMULATION_FAULTS] = {
127 .symbol = "emulation-faults",
128 .alias = "",
129 },
130 [PERF_COUNT_SW_DUMMY] = {
131 .symbol = "dummy",
132 .alias = "",
133 },
134 [PERF_COUNT_SW_BPF_OUTPUT] = {
135 .symbol = "bpf-output",
136 .alias = "",
137 },
138 };
139
140 #define __PERF_EVENT_FIELD(config, name) \
141 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
142
143 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
144 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
145 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
146 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
147
148 #define for_each_subsystem(sys_dir, sys_dirent) \
149 while ((sys_dirent = readdir(sys_dir)) != NULL) \
150 if (sys_dirent->d_type == DT_DIR && \
151 (strcmp(sys_dirent->d_name, ".")) && \
152 (strcmp(sys_dirent->d_name, "..")))
153
154 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
155 {
156 char evt_path[MAXPATHLEN];
157 int fd;
158
159 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
160 sys_dir->d_name, evt_dir->d_name);
161 fd = open(evt_path, O_RDONLY);
162 if (fd < 0)
163 return -EINVAL;
164 close(fd);
165
166 return 0;
167 }
168
169 #define for_each_event(sys_dirent, evt_dir, evt_dirent) \
170 while ((evt_dirent = readdir(evt_dir)) != NULL) \
171 if (evt_dirent->d_type == DT_DIR && \
172 (strcmp(evt_dirent->d_name, ".")) && \
173 (strcmp(evt_dirent->d_name, "..")) && \
174 (!tp_event_has_id(sys_dirent, evt_dirent)))
175
176 #define MAX_EVENT_LENGTH 512
177
178
179 struct tracepoint_path *tracepoint_id_to_path(u64 config)
180 {
181 struct tracepoint_path *path = NULL;
182 DIR *sys_dir, *evt_dir;
183 struct dirent *sys_dirent, *evt_dirent;
184 char id_buf[24];
185 int fd;
186 u64 id;
187 char evt_path[MAXPATHLEN];
188 char dir_path[MAXPATHLEN];
189
190 sys_dir = opendir(tracing_events_path);
191 if (!sys_dir)
192 return NULL;
193
194 for_each_subsystem(sys_dir, sys_dirent) {
195
196 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
197 sys_dirent->d_name);
198 evt_dir = opendir(dir_path);
199 if (!evt_dir)
200 continue;
201
202 for_each_event(sys_dirent, evt_dir, evt_dirent) {
203
204 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
205 evt_dirent->d_name);
206 fd = open(evt_path, O_RDONLY);
207 if (fd < 0)
208 continue;
209 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
210 close(fd);
211 continue;
212 }
213 close(fd);
214 id = atoll(id_buf);
215 if (id == config) {
216 closedir(evt_dir);
217 closedir(sys_dir);
218 path = zalloc(sizeof(*path));
219 if (!path)
220 return NULL;
221 path->system = malloc(MAX_EVENT_LENGTH);
222 if (!path->system) {
223 free(path);
224 return NULL;
225 }
226 path->name = malloc(MAX_EVENT_LENGTH);
227 if (!path->name) {
228 zfree(&path->system);
229 free(path);
230 return NULL;
231 }
232 strncpy(path->system, sys_dirent->d_name,
233 MAX_EVENT_LENGTH);
234 strncpy(path->name, evt_dirent->d_name,
235 MAX_EVENT_LENGTH);
236 return path;
237 }
238 }
239 closedir(evt_dir);
240 }
241
242 closedir(sys_dir);
243 return NULL;
244 }
245
246 struct tracepoint_path *tracepoint_name_to_path(const char *name)
247 {
248 struct tracepoint_path *path = zalloc(sizeof(*path));
249 char *str = strchr(name, ':');
250
251 if (path == NULL || str == NULL) {
252 free(path);
253 return NULL;
254 }
255
256 path->system = strndup(name, str - name);
257 path->name = strdup(str+1);
258
259 if (path->system == NULL || path->name == NULL) {
260 zfree(&path->system);
261 zfree(&path->name);
262 zfree(&path);
263 }
264
265 return path;
266 }
267
268 const char *event_type(int type)
269 {
270 switch (type) {
271 case PERF_TYPE_HARDWARE:
272 return "hardware";
273
274 case PERF_TYPE_SOFTWARE:
275 return "software";
276
277 case PERF_TYPE_TRACEPOINT:
278 return "tracepoint";
279
280 case PERF_TYPE_HW_CACHE:
281 return "hardware-cache";
282
283 default:
284 break;
285 }
286
287 return "unknown";
288 }
289
290 static int parse_events__is_name_term(struct parse_events_term *term)
291 {
292 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
293 }
294
295 static char *get_config_name(struct list_head *head_terms)
296 {
297 struct parse_events_term *term;
298
299 if (!head_terms)
300 return NULL;
301
302 list_for_each_entry(term, head_terms, list)
303 if (parse_events__is_name_term(term))
304 return term->val.str;
305
306 return NULL;
307 }
308
309 static struct perf_evsel *
310 __add_event(struct list_head *list, int *idx,
311 struct perf_event_attr *attr,
312 char *name, struct cpu_map *cpus,
313 struct list_head *config_terms)
314 {
315 struct perf_evsel *evsel;
316
317 event_attr_init(attr);
318
319 evsel = perf_evsel__new_idx(attr, *idx);
320 if (!evsel)
321 return NULL;
322
323 (*idx)++;
324 evsel->cpus = cpu_map__get(cpus);
325 evsel->own_cpus = cpu_map__get(cpus);
326 evsel->system_wide = !!cpus;
327
328 if (name)
329 evsel->name = strdup(name);
330
331 if (config_terms)
332 list_splice(config_terms, &evsel->config_terms);
333
334 list_add_tail(&evsel->node, list);
335 return evsel;
336 }
337
338 static int add_event(struct list_head *list, int *idx,
339 struct perf_event_attr *attr, char *name,
340 struct list_head *config_terms)
341 {
342 return __add_event(list, idx, attr, name, NULL, config_terms) ? 0 : -ENOMEM;
343 }
344
345 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
346 {
347 int i, j;
348 int n, longest = -1;
349
350 for (i = 0; i < size; i++) {
351 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
352 n = strlen(names[i][j]);
353 if (n > longest && !strncasecmp(str, names[i][j], n))
354 longest = n;
355 }
356 if (longest > 0)
357 return i;
358 }
359
360 return -1;
361 }
362
363 typedef int config_term_func_t(struct perf_event_attr *attr,
364 struct parse_events_term *term,
365 struct parse_events_error *err);
366 static int config_term_common(struct perf_event_attr *attr,
367 struct parse_events_term *term,
368 struct parse_events_error *err);
369 static int config_attr(struct perf_event_attr *attr,
370 struct list_head *head,
371 struct parse_events_error *err,
372 config_term_func_t config_term);
373
374 int parse_events_add_cache(struct list_head *list, int *idx,
375 char *type, char *op_result1, char *op_result2,
376 struct parse_events_error *err,
377 struct list_head *head_config)
378 {
379 struct perf_event_attr attr;
380 LIST_HEAD(config_terms);
381 char name[MAX_NAME_LEN], *config_name;
382 int cache_type = -1, cache_op = -1, cache_result = -1;
383 char *op_result[2] = { op_result1, op_result2 };
384 int i, n;
385
386 /*
387 * No fallback - if we cannot get a clear cache type
388 * then bail out:
389 */
390 cache_type = parse_aliases(type, perf_evsel__hw_cache,
391 PERF_COUNT_HW_CACHE_MAX);
392 if (cache_type == -1)
393 return -EINVAL;
394
395 config_name = get_config_name(head_config);
396 n = snprintf(name, MAX_NAME_LEN, "%s", type);
397
398 for (i = 0; (i < 2) && (op_result[i]); i++) {
399 char *str = op_result[i];
400
401 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
402
403 if (cache_op == -1) {
404 cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
405 PERF_COUNT_HW_CACHE_OP_MAX);
406 if (cache_op >= 0) {
407 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
408 return -EINVAL;
409 continue;
410 }
411 }
412
413 if (cache_result == -1) {
414 cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
415 PERF_COUNT_HW_CACHE_RESULT_MAX);
416 if (cache_result >= 0)
417 continue;
418 }
419 }
420
421 /*
422 * Fall back to reads:
423 */
424 if (cache_op == -1)
425 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
426
427 /*
428 * Fall back to accesses:
429 */
430 if (cache_result == -1)
431 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
432
433 memset(&attr, 0, sizeof(attr));
434 attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
435 attr.type = PERF_TYPE_HW_CACHE;
436
437 if (head_config) {
438 if (config_attr(&attr, head_config, err,
439 config_term_common))
440 return -EINVAL;
441
442 if (get_config_terms(head_config, &config_terms))
443 return -ENOMEM;
444 }
445 return add_event(list, idx, &attr, config_name ? : name, &config_terms);
446 }
447
448 static void tracepoint_error(struct parse_events_error *e, int err,
449 const char *sys, const char *name)
450 {
451 char help[BUFSIZ];
452
453 if (!e)
454 return;
455
456 /*
457 * We get error directly from syscall errno ( > 0),
458 * or from encoded pointer's error ( < 0).
459 */
460 err = abs(err);
461
462 switch (err) {
463 case EACCES:
464 e->str = strdup("can't access trace events");
465 break;
466 case ENOENT:
467 e->str = strdup("unknown tracepoint");
468 break;
469 default:
470 e->str = strdup("failed to add tracepoint");
471 break;
472 }
473
474 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
475 e->help = strdup(help);
476 }
477
478 static int add_tracepoint(struct list_head *list, int *idx,
479 const char *sys_name, const char *evt_name,
480 struct parse_events_error *err,
481 struct list_head *head_config)
482 {
483 struct perf_evsel *evsel;
484
485 evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
486 if (IS_ERR(evsel)) {
487 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
488 return PTR_ERR(evsel);
489 }
490
491 if (head_config) {
492 LIST_HEAD(config_terms);
493
494 if (get_config_terms(head_config, &config_terms))
495 return -ENOMEM;
496 list_splice(&config_terms, &evsel->config_terms);
497 }
498
499 list_add_tail(&evsel->node, list);
500 return 0;
501 }
502
503 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
504 const char *sys_name, const char *evt_name,
505 struct parse_events_error *err,
506 struct list_head *head_config)
507 {
508 char evt_path[MAXPATHLEN];
509 struct dirent *evt_ent;
510 DIR *evt_dir;
511 int ret = 0, found = 0;
512
513 snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
514 evt_dir = opendir(evt_path);
515 if (!evt_dir) {
516 tracepoint_error(err, errno, sys_name, evt_name);
517 return -1;
518 }
519
520 while (!ret && (evt_ent = readdir(evt_dir))) {
521 if (!strcmp(evt_ent->d_name, ".")
522 || !strcmp(evt_ent->d_name, "..")
523 || !strcmp(evt_ent->d_name, "enable")
524 || !strcmp(evt_ent->d_name, "filter"))
525 continue;
526
527 if (!strglobmatch(evt_ent->d_name, evt_name))
528 continue;
529
530 found++;
531
532 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
533 err, head_config);
534 }
535
536 if (!found) {
537 tracepoint_error(err, ENOENT, sys_name, evt_name);
538 ret = -1;
539 }
540
541 closedir(evt_dir);
542 return ret;
543 }
544
545 static int add_tracepoint_event(struct list_head *list, int *idx,
546 const char *sys_name, const char *evt_name,
547 struct parse_events_error *err,
548 struct list_head *head_config)
549 {
550 return strpbrk(evt_name, "*?") ?
551 add_tracepoint_multi_event(list, idx, sys_name, evt_name,
552 err, head_config) :
553 add_tracepoint(list, idx, sys_name, evt_name,
554 err, head_config);
555 }
556
557 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
558 const char *sys_name, const char *evt_name,
559 struct parse_events_error *err,
560 struct list_head *head_config)
561 {
562 struct dirent *events_ent;
563 DIR *events_dir;
564 int ret = 0;
565
566 events_dir = opendir(tracing_events_path);
567 if (!events_dir) {
568 tracepoint_error(err, errno, sys_name, evt_name);
569 return -1;
570 }
571
572 while (!ret && (events_ent = readdir(events_dir))) {
573 if (!strcmp(events_ent->d_name, ".")
574 || !strcmp(events_ent->d_name, "..")
575 || !strcmp(events_ent->d_name, "enable")
576 || !strcmp(events_ent->d_name, "header_event")
577 || !strcmp(events_ent->d_name, "header_page"))
578 continue;
579
580 if (!strglobmatch(events_ent->d_name, sys_name))
581 continue;
582
583 ret = add_tracepoint_event(list, idx, events_ent->d_name,
584 evt_name, err, head_config);
585 }
586
587 closedir(events_dir);
588 return ret;
589 }
590
591 struct __add_bpf_event_param {
592 struct parse_events_evlist *data;
593 struct list_head *list;
594 struct list_head *head_config;
595 };
596
597 static int add_bpf_event(const char *group, const char *event, int fd,
598 void *_param)
599 {
600 LIST_HEAD(new_evsels);
601 struct __add_bpf_event_param *param = _param;
602 struct parse_events_evlist *evlist = param->data;
603 struct list_head *list = param->list;
604 struct perf_evsel *pos;
605 int err;
606
607 pr_debug("add bpf event %s:%s and attach bpf program %d\n",
608 group, event, fd);
609
610 err = parse_events_add_tracepoint(&new_evsels, &evlist->idx, group,
611 event, evlist->error,
612 param->head_config);
613 if (err) {
614 struct perf_evsel *evsel, *tmp;
615
616 pr_debug("Failed to add BPF event %s:%s\n",
617 group, event);
618 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
619 list_del(&evsel->node);
620 perf_evsel__delete(evsel);
621 }
622 return err;
623 }
624 pr_debug("adding %s:%s\n", group, event);
625
626 list_for_each_entry(pos, &new_evsels, node) {
627 pr_debug("adding %s:%s to %p\n",
628 group, event, pos);
629 pos->bpf_fd = fd;
630 }
631 list_splice(&new_evsels, list);
632 return 0;
633 }
634
635 int parse_events_load_bpf_obj(struct parse_events_evlist *data,
636 struct list_head *list,
637 struct bpf_object *obj,
638 struct list_head *head_config)
639 {
640 int err;
641 char errbuf[BUFSIZ];
642 struct __add_bpf_event_param param = {data, list, head_config};
643 static bool registered_unprobe_atexit = false;
644
645 if (IS_ERR(obj) || !obj) {
646 snprintf(errbuf, sizeof(errbuf),
647 "Internal error: load bpf obj with NULL");
648 err = -EINVAL;
649 goto errout;
650 }
651
652 /*
653 * Register atexit handler before calling bpf__probe() so
654 * bpf__probe() don't need to unprobe probe points its already
655 * created when failure.
656 */
657 if (!registered_unprobe_atexit) {
658 atexit(bpf__clear);
659 registered_unprobe_atexit = true;
660 }
661
662 err = bpf__probe(obj);
663 if (err) {
664 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
665 goto errout;
666 }
667
668 err = bpf__load(obj);
669 if (err) {
670 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
671 goto errout;
672 }
673
674 err = bpf__foreach_event(obj, add_bpf_event, &param);
675 if (err) {
676 snprintf(errbuf, sizeof(errbuf),
677 "Attach events in BPF object failed");
678 goto errout;
679 }
680
681 return 0;
682 errout:
683 data->error->help = strdup("(add -v to see detail)");
684 data->error->str = strdup(errbuf);
685 return err;
686 }
687
688 static int
689 parse_events_config_bpf(struct parse_events_evlist *data,
690 struct bpf_object *obj,
691 struct list_head *head_config)
692 {
693 struct parse_events_term *term;
694 int error_pos;
695
696 if (!head_config || list_empty(head_config))
697 return 0;
698
699 list_for_each_entry(term, head_config, list) {
700 char errbuf[BUFSIZ];
701 int err;
702
703 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
704 snprintf(errbuf, sizeof(errbuf),
705 "Invalid config term for BPF object");
706 errbuf[BUFSIZ - 1] = '\0';
707
708 data->error->idx = term->err_term;
709 data->error->str = strdup(errbuf);
710 return -EINVAL;
711 }
712
713 err = bpf__config_obj(obj, term, data->evlist, &error_pos);
714 if (err) {
715 bpf__strerror_config_obj(obj, term, data->evlist,
716 &error_pos, err, errbuf,
717 sizeof(errbuf));
718 data->error->help = strdup(
719 "Hint:\tValid config terms:\n"
720 " \tmap:[<arraymap>].value<indices>=[value]\n"
721 " \tmap:[<eventmap>].event<indices>=[event]\n"
722 "\n"
723 " \twhere <indices> is something like [0,3...5] or [all]\n"
724 " \t(add -v to see detail)");
725 data->error->str = strdup(errbuf);
726 if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
727 data->error->idx = term->err_val;
728 else
729 data->error->idx = term->err_term + error_pos;
730 return err;
731 }
732 }
733 return 0;
734 }
735
736 /*
737 * Split config terms:
738 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
739 * 'call-graph=fp' is 'evt config', should be applied to each
740 * events in bpf.c.
741 * 'map:array.value[0]=1' is 'obj config', should be processed
742 * with parse_events_config_bpf.
743 *
744 * Move object config terms from the first list to obj_head_config.
745 */
746 static void
747 split_bpf_config_terms(struct list_head *evt_head_config,
748 struct list_head *obj_head_config)
749 {
750 struct parse_events_term *term, *temp;
751
752 /*
753 * Currectly, all possible user config term
754 * belong to bpf object. parse_events__is_hardcoded_term()
755 * happends to be a good flag.
756 *
757 * See parse_events_config_bpf() and
758 * config_term_tracepoint().
759 */
760 list_for_each_entry_safe(term, temp, evt_head_config, list)
761 if (!parse_events__is_hardcoded_term(term))
762 list_move_tail(&term->list, obj_head_config);
763 }
764
765 int parse_events_load_bpf(struct parse_events_evlist *data,
766 struct list_head *list,
767 char *bpf_file_name,
768 bool source,
769 struct list_head *head_config)
770 {
771 int err;
772 struct bpf_object *obj;
773 LIST_HEAD(obj_head_config);
774
775 if (head_config)
776 split_bpf_config_terms(head_config, &obj_head_config);
777
778 obj = bpf__prepare_load(bpf_file_name, source);
779 if (IS_ERR(obj)) {
780 char errbuf[BUFSIZ];
781
782 err = PTR_ERR(obj);
783
784 if (err == -ENOTSUP)
785 snprintf(errbuf, sizeof(errbuf),
786 "BPF support is not compiled");
787 else
788 bpf__strerror_prepare_load(bpf_file_name,
789 source,
790 -err, errbuf,
791 sizeof(errbuf));
792
793 data->error->help = strdup("(add -v to see detail)");
794 data->error->str = strdup(errbuf);
795 return err;
796 }
797
798 err = parse_events_load_bpf_obj(data, list, obj, head_config);
799 if (err)
800 return err;
801 err = parse_events_config_bpf(data, obj, &obj_head_config);
802
803 /*
804 * Caller doesn't know anything about obj_head_config,
805 * so combine them together again before returnning.
806 */
807 if (head_config)
808 list_splice_tail(&obj_head_config, head_config);
809 return err;
810 }
811
812 static int
813 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
814 {
815 int i;
816
817 for (i = 0; i < 3; i++) {
818 if (!type || !type[i])
819 break;
820
821 #define CHECK_SET_TYPE(bit) \
822 do { \
823 if (attr->bp_type & bit) \
824 return -EINVAL; \
825 else \
826 attr->bp_type |= bit; \
827 } while (0)
828
829 switch (type[i]) {
830 case 'r':
831 CHECK_SET_TYPE(HW_BREAKPOINT_R);
832 break;
833 case 'w':
834 CHECK_SET_TYPE(HW_BREAKPOINT_W);
835 break;
836 case 'x':
837 CHECK_SET_TYPE(HW_BREAKPOINT_X);
838 break;
839 default:
840 return -EINVAL;
841 }
842 }
843
844 #undef CHECK_SET_TYPE
845
846 if (!attr->bp_type) /* Default */
847 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
848
849 return 0;
850 }
851
852 int parse_events_add_breakpoint(struct list_head *list, int *idx,
853 void *ptr, char *type, u64 len)
854 {
855 struct perf_event_attr attr;
856
857 memset(&attr, 0, sizeof(attr));
858 attr.bp_addr = (unsigned long) ptr;
859
860 if (parse_breakpoint_type(type, &attr))
861 return -EINVAL;
862
863 /* Provide some defaults if len is not specified */
864 if (!len) {
865 if (attr.bp_type == HW_BREAKPOINT_X)
866 len = sizeof(long);
867 else
868 len = HW_BREAKPOINT_LEN_4;
869 }
870
871 attr.bp_len = len;
872
873 attr.type = PERF_TYPE_BREAKPOINT;
874 attr.sample_period = 1;
875
876 return add_event(list, idx, &attr, NULL, NULL);
877 }
878
879 static int check_type_val(struct parse_events_term *term,
880 struct parse_events_error *err,
881 int type)
882 {
883 if (type == term->type_val)
884 return 0;
885
886 if (err) {
887 err->idx = term->err_val;
888 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
889 err->str = strdup("expected numeric value");
890 else
891 err->str = strdup("expected string value");
892 }
893 return -EINVAL;
894 }
895
896 /*
897 * Update according to parse-events.l
898 */
899 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
900 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>",
901 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config",
902 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1",
903 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2",
904 [PARSE_EVENTS__TERM_TYPE_NAME] = "name",
905 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period",
906 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq",
907 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type",
908 [PARSE_EVENTS__TERM_TYPE_TIME] = "time",
909 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph",
910 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size",
911 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit",
912 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit",
913 [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack",
914 [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite",
915 [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite",
916 [PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config",
917 };
918
919 static bool config_term_shrinked;
920
921 static bool
922 config_term_avail(int term_type, struct parse_events_error *err)
923 {
924 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
925 err->str = strdup("Invalid term_type");
926 return false;
927 }
928 if (!config_term_shrinked)
929 return true;
930
931 switch (term_type) {
932 case PARSE_EVENTS__TERM_TYPE_CONFIG:
933 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
934 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
935 case PARSE_EVENTS__TERM_TYPE_NAME:
936 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
937 return true;
938 default:
939 if (!err)
940 return false;
941
942 /* term_type is validated so indexing is safe */
943 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
944 config_term_names[term_type]) < 0)
945 err->str = NULL;
946 return false;
947 }
948 }
949
950 void parse_events__shrink_config_terms(void)
951 {
952 config_term_shrinked = true;
953 }
954
955 static int config_term_common(struct perf_event_attr *attr,
956 struct parse_events_term *term,
957 struct parse_events_error *err)
958 {
959 #define CHECK_TYPE_VAL(type) \
960 do { \
961 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
962 return -EINVAL; \
963 } while (0)
964
965 switch (term->type_term) {
966 case PARSE_EVENTS__TERM_TYPE_CONFIG:
967 CHECK_TYPE_VAL(NUM);
968 attr->config = term->val.num;
969 break;
970 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
971 CHECK_TYPE_VAL(NUM);
972 attr->config1 = term->val.num;
973 break;
974 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
975 CHECK_TYPE_VAL(NUM);
976 attr->config2 = term->val.num;
977 break;
978 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
979 CHECK_TYPE_VAL(NUM);
980 break;
981 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
982 CHECK_TYPE_VAL(NUM);
983 break;
984 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
985 CHECK_TYPE_VAL(STR);
986 if (strcmp(term->val.str, "no") &&
987 parse_branch_str(term->val.str, &attr->branch_sample_type)) {
988 err->str = strdup("invalid branch sample type");
989 err->idx = term->err_val;
990 return -EINVAL;
991 }
992 break;
993 case PARSE_EVENTS__TERM_TYPE_TIME:
994 CHECK_TYPE_VAL(NUM);
995 if (term->val.num > 1) {
996 err->str = strdup("expected 0 or 1");
997 err->idx = term->err_val;
998 return -EINVAL;
999 }
1000 break;
1001 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1002 CHECK_TYPE_VAL(STR);
1003 break;
1004 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1005 CHECK_TYPE_VAL(NUM);
1006 break;
1007 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1008 CHECK_TYPE_VAL(NUM);
1009 break;
1010 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1011 CHECK_TYPE_VAL(NUM);
1012 break;
1013 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1014 CHECK_TYPE_VAL(NUM);
1015 break;
1016 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1017 CHECK_TYPE_VAL(NUM);
1018 break;
1019 case PARSE_EVENTS__TERM_TYPE_NAME:
1020 CHECK_TYPE_VAL(STR);
1021 break;
1022 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1023 CHECK_TYPE_VAL(NUM);
1024 break;
1025 default:
1026 err->str = strdup("unknown term");
1027 err->idx = term->err_term;
1028 err->help = parse_events_formats_error_string(NULL);
1029 return -EINVAL;
1030 }
1031
1032 /*
1033 * Check term availbility after basic checking so
1034 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1035 *
1036 * If check availbility at the entry of this function,
1037 * user will see "'<sysfs term>' is not usable in 'perf stat'"
1038 * if an invalid config term is provided for legacy events
1039 * (for example, instructions/badterm/...), which is confusing.
1040 */
1041 if (!config_term_avail(term->type_term, err))
1042 return -EINVAL;
1043 return 0;
1044 #undef CHECK_TYPE_VAL
1045 }
1046
1047 static int config_term_pmu(struct perf_event_attr *attr,
1048 struct parse_events_term *term,
1049 struct parse_events_error *err)
1050 {
1051 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1052 term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1053 /*
1054 * Always succeed for sysfs terms, as we dont know
1055 * at this point what type they need to have.
1056 */
1057 return 0;
1058 else
1059 return config_term_common(attr, term, err);
1060 }
1061
1062 static int config_term_tracepoint(struct perf_event_attr *attr,
1063 struct parse_events_term *term,
1064 struct parse_events_error *err)
1065 {
1066 switch (term->type_term) {
1067 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1068 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1069 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1070 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1071 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1072 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1073 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1074 return config_term_common(attr, term, err);
1075 default:
1076 if (err) {
1077 err->idx = term->err_term;
1078 err->str = strdup("unknown term");
1079 err->help = strdup("valid terms: call-graph,stack-size\n");
1080 }
1081 return -EINVAL;
1082 }
1083
1084 return 0;
1085 }
1086
1087 static int config_attr(struct perf_event_attr *attr,
1088 struct list_head *head,
1089 struct parse_events_error *err,
1090 config_term_func_t config_term)
1091 {
1092 struct parse_events_term *term;
1093
1094 list_for_each_entry(term, head, list)
1095 if (config_term(attr, term, err))
1096 return -EINVAL;
1097
1098 return 0;
1099 }
1100
1101 static int get_config_terms(struct list_head *head_config,
1102 struct list_head *head_terms __maybe_unused)
1103 {
1104 #define ADD_CONFIG_TERM(__type, __name, __val) \
1105 do { \
1106 struct perf_evsel_config_term *__t; \
1107 \
1108 __t = zalloc(sizeof(*__t)); \
1109 if (!__t) \
1110 return -ENOMEM; \
1111 \
1112 INIT_LIST_HEAD(&__t->list); \
1113 __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
1114 __t->val.__name = __val; \
1115 list_add_tail(&__t->list, head_terms); \
1116 } while (0)
1117
1118 struct parse_events_term *term;
1119
1120 list_for_each_entry(term, head_config, list) {
1121 switch (term->type_term) {
1122 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1123 ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1124 break;
1125 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1126 ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1127 break;
1128 case PARSE_EVENTS__TERM_TYPE_TIME:
1129 ADD_CONFIG_TERM(TIME, time, term->val.num);
1130 break;
1131 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1132 ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1133 break;
1134 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1135 ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1136 break;
1137 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1138 ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1139 break;
1140 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1141 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1142 break;
1143 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1144 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1145 break;
1146 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1147 ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1148 break;
1149 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1150 ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1151 break;
1152 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1153 ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1154 break;
1155 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1156 ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1157 break;
1158 default:
1159 break;
1160 }
1161 }
1162 #undef ADD_EVSEL_CONFIG
1163 return 0;
1164 }
1165
1166 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1167 const char *sys, const char *event,
1168 struct parse_events_error *err,
1169 struct list_head *head_config)
1170 {
1171 if (head_config) {
1172 struct perf_event_attr attr;
1173
1174 if (config_attr(&attr, head_config, err,
1175 config_term_tracepoint))
1176 return -EINVAL;
1177 }
1178
1179 if (strpbrk(sys, "*?"))
1180 return add_tracepoint_multi_sys(list, idx, sys, event,
1181 err, head_config);
1182 else
1183 return add_tracepoint_event(list, idx, sys, event,
1184 err, head_config);
1185 }
1186
1187 int parse_events_add_numeric(struct parse_events_evlist *data,
1188 struct list_head *list,
1189 u32 type, u64 config,
1190 struct list_head *head_config)
1191 {
1192 struct perf_event_attr attr;
1193 LIST_HEAD(config_terms);
1194
1195 memset(&attr, 0, sizeof(attr));
1196 attr.type = type;
1197 attr.config = config;
1198
1199 if (head_config) {
1200 if (config_attr(&attr, head_config, data->error,
1201 config_term_common))
1202 return -EINVAL;
1203
1204 if (get_config_terms(head_config, &config_terms))
1205 return -ENOMEM;
1206 }
1207
1208 return add_event(list, &data->idx, &attr,
1209 get_config_name(head_config), &config_terms);
1210 }
1211
1212 int parse_events_add_pmu(struct parse_events_evlist *data,
1213 struct list_head *list, char *name,
1214 struct list_head *head_config)
1215 {
1216 struct perf_event_attr attr;
1217 struct perf_pmu_info info;
1218 struct perf_pmu *pmu;
1219 struct perf_evsel *evsel;
1220 LIST_HEAD(config_terms);
1221
1222 pmu = perf_pmu__find(name);
1223 if (!pmu)
1224 return -EINVAL;
1225
1226 if (pmu->default_config) {
1227 memcpy(&attr, pmu->default_config,
1228 sizeof(struct perf_event_attr));
1229 } else {
1230 memset(&attr, 0, sizeof(attr));
1231 }
1232
1233 if (!head_config) {
1234 attr.type = pmu->type;
1235 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
1236 return evsel ? 0 : -ENOMEM;
1237 }
1238
1239 if (perf_pmu__check_alias(pmu, head_config, &info))
1240 return -EINVAL;
1241
1242 /*
1243 * Configure hardcoded terms first, no need to check
1244 * return value when called with fail == 0 ;)
1245 */
1246 if (config_attr(&attr, head_config, data->error, config_term_pmu))
1247 return -EINVAL;
1248
1249 if (get_config_terms(head_config, &config_terms))
1250 return -ENOMEM;
1251
1252 if (perf_pmu__config(pmu, &attr, head_config, data->error))
1253 return -EINVAL;
1254
1255 evsel = __add_event(list, &data->idx, &attr,
1256 get_config_name(head_config), pmu->cpus,
1257 &config_terms);
1258 if (evsel) {
1259 evsel->unit = info.unit;
1260 evsel->scale = info.scale;
1261 evsel->per_pkg = info.per_pkg;
1262 evsel->snapshot = info.snapshot;
1263 evsel->metric_expr = info.metric_expr;
1264 evsel->metric_name = info.metric_name;
1265 }
1266
1267 return evsel ? 0 : -ENOMEM;
1268 }
1269
1270 int parse_events_multi_pmu_add(struct parse_events_evlist *data,
1271 char *str, struct list_head **listp)
1272 {
1273 struct list_head *head;
1274 struct parse_events_term *term;
1275 struct list_head *list;
1276 struct perf_pmu *pmu = NULL;
1277 int ok = 0;
1278
1279 *listp = NULL;
1280 /* Add it for all PMUs that support the alias */
1281 list = malloc(sizeof(struct list_head));
1282 if (!list)
1283 return -1;
1284 INIT_LIST_HEAD(list);
1285 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1286 struct perf_pmu_alias *alias;
1287
1288 list_for_each_entry(alias, &pmu->aliases, list) {
1289 if (!strcasecmp(alias->name, str)) {
1290 head = malloc(sizeof(struct list_head));
1291 if (!head)
1292 return -1;
1293 INIT_LIST_HEAD(head);
1294 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1295 str, 1, false, &str, NULL) < 0)
1296 return -1;
1297 list_add_tail(&term->list, head);
1298
1299 if (!parse_events_add_pmu(data, list,
1300 pmu->name, head)) {
1301 pr_debug("%s -> %s/%s/\n", str,
1302 pmu->name, alias->str);
1303 ok++;
1304 }
1305
1306 parse_events_terms__delete(head);
1307 }
1308 }
1309 }
1310 if (!ok)
1311 return -1;
1312 *listp = list;
1313 return 0;
1314 }
1315
1316 int parse_events__modifier_group(struct list_head *list,
1317 char *event_mod)
1318 {
1319 return parse_events__modifier_event(list, event_mod, true);
1320 }
1321
1322 void parse_events__set_leader(char *name, struct list_head *list)
1323 {
1324 struct perf_evsel *leader;
1325
1326 if (list_empty(list)) {
1327 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1328 return;
1329 }
1330
1331 __perf_evlist__set_leader(list);
1332 leader = list_entry(list->next, struct perf_evsel, node);
1333 leader->group_name = name ? strdup(name) : NULL;
1334 }
1335
1336 /* list_event is assumed to point to malloc'ed memory */
1337 void parse_events_update_lists(struct list_head *list_event,
1338 struct list_head *list_all)
1339 {
1340 /*
1341 * Called for single event definition. Update the
1342 * 'all event' list, and reinit the 'single event'
1343 * list, for next event definition.
1344 */
1345 list_splice_tail(list_event, list_all);
1346 free(list_event);
1347 }
1348
1349 struct event_modifier {
1350 int eu;
1351 int ek;
1352 int eh;
1353 int eH;
1354 int eG;
1355 int eI;
1356 int precise;
1357 int precise_max;
1358 int exclude_GH;
1359 int sample_read;
1360 int pinned;
1361 };
1362
1363 static int get_event_modifier(struct event_modifier *mod, char *str,
1364 struct perf_evsel *evsel)
1365 {
1366 int eu = evsel ? evsel->attr.exclude_user : 0;
1367 int ek = evsel ? evsel->attr.exclude_kernel : 0;
1368 int eh = evsel ? evsel->attr.exclude_hv : 0;
1369 int eH = evsel ? evsel->attr.exclude_host : 0;
1370 int eG = evsel ? evsel->attr.exclude_guest : 0;
1371 int eI = evsel ? evsel->attr.exclude_idle : 0;
1372 int precise = evsel ? evsel->attr.precise_ip : 0;
1373 int precise_max = 0;
1374 int sample_read = 0;
1375 int pinned = evsel ? evsel->attr.pinned : 0;
1376
1377 int exclude = eu | ek | eh;
1378 int exclude_GH = evsel ? evsel->exclude_GH : 0;
1379
1380 memset(mod, 0, sizeof(*mod));
1381
1382 while (*str) {
1383 if (*str == 'u') {
1384 if (!exclude)
1385 exclude = eu = ek = eh = 1;
1386 eu = 0;
1387 } else if (*str == 'k') {
1388 if (!exclude)
1389 exclude = eu = ek = eh = 1;
1390 ek = 0;
1391 } else if (*str == 'h') {
1392 if (!exclude)
1393 exclude = eu = ek = eh = 1;
1394 eh = 0;
1395 } else if (*str == 'G') {
1396 if (!exclude_GH)
1397 exclude_GH = eG = eH = 1;
1398 eG = 0;
1399 } else if (*str == 'H') {
1400 if (!exclude_GH)
1401 exclude_GH = eG = eH = 1;
1402 eH = 0;
1403 } else if (*str == 'I') {
1404 eI = 1;
1405 } else if (*str == 'p') {
1406 precise++;
1407 /* use of precise requires exclude_guest */
1408 if (!exclude_GH)
1409 eG = 1;
1410 } else if (*str == 'P') {
1411 precise_max = 1;
1412 } else if (*str == 'S') {
1413 sample_read = 1;
1414 } else if (*str == 'D') {
1415 pinned = 1;
1416 } else
1417 break;
1418
1419 ++str;
1420 }
1421
1422 /*
1423 * precise ip:
1424 *
1425 * 0 - SAMPLE_IP can have arbitrary skid
1426 * 1 - SAMPLE_IP must have constant skid
1427 * 2 - SAMPLE_IP requested to have 0 skid
1428 * 3 - SAMPLE_IP must have 0 skid
1429 *
1430 * See also PERF_RECORD_MISC_EXACT_IP
1431 */
1432 if (precise > 3)
1433 return -EINVAL;
1434
1435 mod->eu = eu;
1436 mod->ek = ek;
1437 mod->eh = eh;
1438 mod->eH = eH;
1439 mod->eG = eG;
1440 mod->eI = eI;
1441 mod->precise = precise;
1442 mod->precise_max = precise_max;
1443 mod->exclude_GH = exclude_GH;
1444 mod->sample_read = sample_read;
1445 mod->pinned = pinned;
1446
1447 return 0;
1448 }
1449
1450 /*
1451 * Basic modifier sanity check to validate it contains only one
1452 * instance of any modifier (apart from 'p') present.
1453 */
1454 static int check_modifier(char *str)
1455 {
1456 char *p = str;
1457
1458 /* The sizeof includes 0 byte as well. */
1459 if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1460 return -1;
1461
1462 while (*p) {
1463 if (*p != 'p' && strchr(p + 1, *p))
1464 return -1;
1465 p++;
1466 }
1467
1468 return 0;
1469 }
1470
1471 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1472 {
1473 struct perf_evsel *evsel;
1474 struct event_modifier mod;
1475
1476 if (str == NULL)
1477 return 0;
1478
1479 if (check_modifier(str))
1480 return -EINVAL;
1481
1482 if (!add && get_event_modifier(&mod, str, NULL))
1483 return -EINVAL;
1484
1485 __evlist__for_each_entry(list, evsel) {
1486 if (add && get_event_modifier(&mod, str, evsel))
1487 return -EINVAL;
1488
1489 evsel->attr.exclude_user = mod.eu;
1490 evsel->attr.exclude_kernel = mod.ek;
1491 evsel->attr.exclude_hv = mod.eh;
1492 evsel->attr.precise_ip = mod.precise;
1493 evsel->attr.exclude_host = mod.eH;
1494 evsel->attr.exclude_guest = mod.eG;
1495 evsel->attr.exclude_idle = mod.eI;
1496 evsel->exclude_GH = mod.exclude_GH;
1497 evsel->sample_read = mod.sample_read;
1498 evsel->precise_max = mod.precise_max;
1499
1500 if (perf_evsel__is_group_leader(evsel))
1501 evsel->attr.pinned = mod.pinned;
1502 }
1503
1504 return 0;
1505 }
1506
1507 int parse_events_name(struct list_head *list, char *name)
1508 {
1509 struct perf_evsel *evsel;
1510
1511 __evlist__for_each_entry(list, evsel) {
1512 if (!evsel->name)
1513 evsel->name = strdup(name);
1514 }
1515
1516 return 0;
1517 }
1518
1519 static int
1520 comp_pmu(const void *p1, const void *p2)
1521 {
1522 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1523 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1524
1525 return strcasecmp(pmu1->symbol, pmu2->symbol);
1526 }
1527
1528 static void perf_pmu__parse_cleanup(void)
1529 {
1530 if (perf_pmu_events_list_num > 0) {
1531 struct perf_pmu_event_symbol *p;
1532 int i;
1533
1534 for (i = 0; i < perf_pmu_events_list_num; i++) {
1535 p = perf_pmu_events_list + i;
1536 zfree(&p->symbol);
1537 }
1538 zfree(&perf_pmu_events_list);
1539 perf_pmu_events_list_num = 0;
1540 }
1541 }
1542
1543 #define SET_SYMBOL(str, stype) \
1544 do { \
1545 p->symbol = str; \
1546 if (!p->symbol) \
1547 goto err; \
1548 p->type = stype; \
1549 } while (0)
1550
1551 /*
1552 * Read the pmu events list from sysfs
1553 * Save it into perf_pmu_events_list
1554 */
1555 static void perf_pmu__parse_init(void)
1556 {
1557
1558 struct perf_pmu *pmu = NULL;
1559 struct perf_pmu_alias *alias;
1560 int len = 0;
1561
1562 pmu = NULL;
1563 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1564 list_for_each_entry(alias, &pmu->aliases, list) {
1565 if (strchr(alias->name, '-'))
1566 len++;
1567 len++;
1568 }
1569 }
1570
1571 if (len == 0) {
1572 perf_pmu_events_list_num = -1;
1573 return;
1574 }
1575 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1576 if (!perf_pmu_events_list)
1577 return;
1578 perf_pmu_events_list_num = len;
1579
1580 len = 0;
1581 pmu = NULL;
1582 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1583 list_for_each_entry(alias, &pmu->aliases, list) {
1584 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1585 char *tmp = strchr(alias->name, '-');
1586
1587 if (tmp != NULL) {
1588 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1589 PMU_EVENT_SYMBOL_PREFIX);
1590 p++;
1591 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1592 len += 2;
1593 } else {
1594 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1595 len++;
1596 }
1597 }
1598 }
1599 qsort(perf_pmu_events_list, len,
1600 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1601
1602 return;
1603 err:
1604 perf_pmu__parse_cleanup();
1605 }
1606
1607 enum perf_pmu_event_symbol_type
1608 perf_pmu__parse_check(const char *name)
1609 {
1610 struct perf_pmu_event_symbol p, *r;
1611
1612 /* scan kernel pmu events from sysfs if needed */
1613 if (perf_pmu_events_list_num == 0)
1614 perf_pmu__parse_init();
1615 /*
1616 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1617 * cpu-cycles has been handled by hardcode.
1618 * So it must be cpu// events, not kernel pmu event.
1619 */
1620 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1621 return PMU_EVENT_SYMBOL_ERR;
1622
1623 p.symbol = strdup(name);
1624 r = bsearch(&p, perf_pmu_events_list,
1625 (size_t) perf_pmu_events_list_num,
1626 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1627 zfree(&p.symbol);
1628 return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1629 }
1630
1631 static int parse_events__scanner(const char *str, void *data, int start_token)
1632 {
1633 YY_BUFFER_STATE buffer;
1634 void *scanner;
1635 int ret;
1636
1637 ret = parse_events_lex_init_extra(start_token, &scanner);
1638 if (ret)
1639 return ret;
1640
1641 buffer = parse_events__scan_string(str, scanner);
1642
1643 #ifdef PARSER_DEBUG
1644 parse_events_debug = 1;
1645 #endif
1646 ret = parse_events_parse(data, scanner);
1647
1648 parse_events__flush_buffer(buffer, scanner);
1649 parse_events__delete_buffer(buffer, scanner);
1650 parse_events_lex_destroy(scanner);
1651 return ret;
1652 }
1653
1654 /*
1655 * parse event config string, return a list of event terms.
1656 */
1657 int parse_events_terms(struct list_head *terms, const char *str)
1658 {
1659 struct parse_events_terms data = {
1660 .terms = NULL,
1661 };
1662 int ret;
1663
1664 ret = parse_events__scanner(str, &data, PE_START_TERMS);
1665 if (!ret) {
1666 list_splice(data.terms, terms);
1667 zfree(&data.terms);
1668 return 0;
1669 }
1670
1671 parse_events_terms__delete(data.terms);
1672 return ret;
1673 }
1674
1675 int parse_events(struct perf_evlist *evlist, const char *str,
1676 struct parse_events_error *err)
1677 {
1678 struct parse_events_evlist data = {
1679 .list = LIST_HEAD_INIT(data.list),
1680 .idx = evlist->nr_entries,
1681 .error = err,
1682 .evlist = evlist,
1683 };
1684 int ret;
1685
1686 ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1687 perf_pmu__parse_cleanup();
1688 if (!ret) {
1689 struct perf_evsel *last;
1690
1691 if (list_empty(&data.list)) {
1692 WARN_ONCE(true, "WARNING: event parser found nothing");
1693 return -1;
1694 }
1695
1696 perf_evlist__splice_list_tail(evlist, &data.list);
1697 evlist->nr_groups += data.nr_groups;
1698 last = perf_evlist__last(evlist);
1699 last->cmdline_group_boundary = true;
1700
1701 return 0;
1702 }
1703
1704 /*
1705 * There are 2 users - builtin-record and builtin-test objects.
1706 * Both call perf_evlist__delete in case of error, so we dont
1707 * need to bother.
1708 */
1709 return ret;
1710 }
1711
1712 #define MAX_WIDTH 1000
1713 static int get_term_width(void)
1714 {
1715 struct winsize ws;
1716
1717 get_term_dimensions(&ws);
1718 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1719 }
1720
1721 static void parse_events_print_error(struct parse_events_error *err,
1722 const char *event)
1723 {
1724 const char *str = "invalid or unsupported event: ";
1725 char _buf[MAX_WIDTH];
1726 char *buf = (char *) event;
1727 int idx = 0;
1728
1729 if (err->str) {
1730 /* -2 for extra '' in the final fprintf */
1731 int width = get_term_width() - 2;
1732 int len_event = strlen(event);
1733 int len_str, max_len, cut = 0;
1734
1735 /*
1736 * Maximum error index indent, we will cut
1737 * the event string if it's bigger.
1738 */
1739 int max_err_idx = 13;
1740
1741 /*
1742 * Let's be specific with the message when
1743 * we have the precise error.
1744 */
1745 str = "event syntax error: ";
1746 len_str = strlen(str);
1747 max_len = width - len_str;
1748
1749 buf = _buf;
1750
1751 /* We're cutting from the beginning. */
1752 if (err->idx > max_err_idx)
1753 cut = err->idx - max_err_idx;
1754
1755 strncpy(buf, event + cut, max_len);
1756
1757 /* Mark cut parts with '..' on both sides. */
1758 if (cut)
1759 buf[0] = buf[1] = '.';
1760
1761 if ((len_event - cut) > max_len) {
1762 buf[max_len - 1] = buf[max_len - 2] = '.';
1763 buf[max_len] = 0;
1764 }
1765
1766 idx = len_str + err->idx - cut;
1767 }
1768
1769 fprintf(stderr, "%s'%s'\n", str, buf);
1770 if (idx) {
1771 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1772 if (err->help)
1773 fprintf(stderr, "\n%s\n", err->help);
1774 zfree(&err->str);
1775 zfree(&err->help);
1776 }
1777
1778 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1779 }
1780
1781 #undef MAX_WIDTH
1782
1783 int parse_events_option(const struct option *opt, const char *str,
1784 int unset __maybe_unused)
1785 {
1786 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1787 struct parse_events_error err = { .idx = 0, };
1788 int ret = parse_events(evlist, str, &err);
1789
1790 if (ret)
1791 parse_events_print_error(&err, str);
1792
1793 return ret;
1794 }
1795
1796 static int
1797 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1798 int (*func)(struct perf_evsel *evsel,
1799 const void *arg),
1800 const void *arg)
1801 {
1802 struct perf_evsel *last = NULL;
1803 int err;
1804
1805 /*
1806 * Don't return when list_empty, give func a chance to report
1807 * error when it found last == NULL.
1808 *
1809 * So no need to WARN here, let *func do this.
1810 */
1811 if (evlist->nr_entries > 0)
1812 last = perf_evlist__last(evlist);
1813
1814 do {
1815 err = (*func)(last, arg);
1816 if (err)
1817 return -1;
1818 if (!last)
1819 return 0;
1820
1821 if (last->node.prev == &evlist->entries)
1822 return 0;
1823 last = list_entry(last->node.prev, struct perf_evsel, node);
1824 } while (!last->cmdline_group_boundary);
1825
1826 return 0;
1827 }
1828
1829 static int set_filter(struct perf_evsel *evsel, const void *arg)
1830 {
1831 const char *str = arg;
1832 bool found = false;
1833 int nr_addr_filters = 0;
1834 struct perf_pmu *pmu = NULL;
1835
1836 if (evsel == NULL)
1837 goto err;
1838
1839 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
1840 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
1841 fprintf(stderr,
1842 "not enough memory to hold filter string\n");
1843 return -1;
1844 }
1845
1846 return 0;
1847 }
1848
1849 while ((pmu = perf_pmu__scan(pmu)) != NULL)
1850 if (pmu->type == evsel->attr.type) {
1851 found = true;
1852 break;
1853 }
1854
1855 if (found)
1856 perf_pmu__scan_file(pmu, "nr_addr_filters",
1857 "%d", &nr_addr_filters);
1858
1859 if (!nr_addr_filters)
1860 goto err;
1861
1862 if (perf_evsel__append_addr_filter(evsel, str) < 0) {
1863 fprintf(stderr,
1864 "not enough memory to hold filter string\n");
1865 return -1;
1866 }
1867
1868 return 0;
1869
1870 err:
1871 fprintf(stderr,
1872 "--filter option should follow a -e tracepoint or HW tracer option\n");
1873
1874 return -1;
1875 }
1876
1877 int parse_filter(const struct option *opt, const char *str,
1878 int unset __maybe_unused)
1879 {
1880 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1881
1882 return foreach_evsel_in_last_glob(evlist, set_filter,
1883 (const void *)str);
1884 }
1885
1886 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1887 const void *arg __maybe_unused)
1888 {
1889 char new_filter[64];
1890
1891 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1892 fprintf(stderr,
1893 "--exclude-perf option should follow a -e tracepoint option\n");
1894 return -1;
1895 }
1896
1897 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1898
1899 if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
1900 fprintf(stderr,
1901 "not enough memory to hold filter string\n");
1902 return -1;
1903 }
1904
1905 return 0;
1906 }
1907
1908 int exclude_perf(const struct option *opt,
1909 const char *arg __maybe_unused,
1910 int unset __maybe_unused)
1911 {
1912 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1913
1914 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1915 NULL);
1916 }
1917
1918 static const char * const event_type_descriptors[] = {
1919 "Hardware event",
1920 "Software event",
1921 "Tracepoint event",
1922 "Hardware cache event",
1923 "Raw hardware event descriptor",
1924 "Hardware breakpoint",
1925 };
1926
1927 static int cmp_string(const void *a, const void *b)
1928 {
1929 const char * const *as = a;
1930 const char * const *bs = b;
1931
1932 return strcmp(*as, *bs);
1933 }
1934
1935 /*
1936 * Print the events from <debugfs_mount_point>/tracing/events
1937 */
1938
1939 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1940 bool name_only)
1941 {
1942 DIR *sys_dir, *evt_dir;
1943 struct dirent *sys_dirent, *evt_dirent;
1944 char evt_path[MAXPATHLEN];
1945 char dir_path[MAXPATHLEN];
1946 char **evt_list = NULL;
1947 unsigned int evt_i = 0, evt_num = 0;
1948 bool evt_num_known = false;
1949
1950 restart:
1951 sys_dir = opendir(tracing_events_path);
1952 if (!sys_dir)
1953 return;
1954
1955 if (evt_num_known) {
1956 evt_list = zalloc(sizeof(char *) * evt_num);
1957 if (!evt_list)
1958 goto out_close_sys_dir;
1959 }
1960
1961 for_each_subsystem(sys_dir, sys_dirent) {
1962 if (subsys_glob != NULL &&
1963 !strglobmatch(sys_dirent->d_name, subsys_glob))
1964 continue;
1965
1966 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1967 sys_dirent->d_name);
1968 evt_dir = opendir(dir_path);
1969 if (!evt_dir)
1970 continue;
1971
1972 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1973 if (event_glob != NULL &&
1974 !strglobmatch(evt_dirent->d_name, event_glob))
1975 continue;
1976
1977 if (!evt_num_known) {
1978 evt_num++;
1979 continue;
1980 }
1981
1982 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1983 sys_dirent->d_name, evt_dirent->d_name);
1984
1985 evt_list[evt_i] = strdup(evt_path);
1986 if (evt_list[evt_i] == NULL)
1987 goto out_close_evt_dir;
1988 evt_i++;
1989 }
1990 closedir(evt_dir);
1991 }
1992 closedir(sys_dir);
1993
1994 if (!evt_num_known) {
1995 evt_num_known = true;
1996 goto restart;
1997 }
1998 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1999 evt_i = 0;
2000 while (evt_i < evt_num) {
2001 if (name_only) {
2002 printf("%s ", evt_list[evt_i++]);
2003 continue;
2004 }
2005 printf(" %-50s [%s]\n", evt_list[evt_i++],
2006 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2007 }
2008 if (evt_num && pager_in_use())
2009 printf("\n");
2010
2011 out_free:
2012 evt_num = evt_i;
2013 for (evt_i = 0; evt_i < evt_num; evt_i++)
2014 zfree(&evt_list[evt_i]);
2015 zfree(&evt_list);
2016 return;
2017
2018 out_close_evt_dir:
2019 closedir(evt_dir);
2020 out_close_sys_dir:
2021 closedir(sys_dir);
2022
2023 printf("FATAL: not enough memory to print %s\n",
2024 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2025 if (evt_list)
2026 goto out_free;
2027 }
2028
2029 /*
2030 * Check whether event is in <debugfs_mount_point>/tracing/events
2031 */
2032
2033 int is_valid_tracepoint(const char *event_string)
2034 {
2035 DIR *sys_dir, *evt_dir;
2036 struct dirent *sys_dirent, *evt_dirent;
2037 char evt_path[MAXPATHLEN];
2038 char dir_path[MAXPATHLEN];
2039
2040 sys_dir = opendir(tracing_events_path);
2041 if (!sys_dir)
2042 return 0;
2043
2044 for_each_subsystem(sys_dir, sys_dirent) {
2045
2046 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
2047 sys_dirent->d_name);
2048 evt_dir = opendir(dir_path);
2049 if (!evt_dir)
2050 continue;
2051
2052 for_each_event(sys_dirent, evt_dir, evt_dirent) {
2053 snprintf(evt_path, MAXPATHLEN, "%s:%s",
2054 sys_dirent->d_name, evt_dirent->d_name);
2055 if (!strcmp(evt_path, event_string)) {
2056 closedir(evt_dir);
2057 closedir(sys_dir);
2058 return 1;
2059 }
2060 }
2061 closedir(evt_dir);
2062 }
2063 closedir(sys_dir);
2064 return 0;
2065 }
2066
2067 static bool is_event_supported(u8 type, unsigned config)
2068 {
2069 bool ret = true;
2070 int open_return;
2071 struct perf_evsel *evsel;
2072 struct perf_event_attr attr = {
2073 .type = type,
2074 .config = config,
2075 .disabled = 1,
2076 };
2077 struct thread_map *tmap = thread_map__new_by_tid(0);
2078
2079 if (tmap == NULL)
2080 return false;
2081
2082 evsel = perf_evsel__new(&attr);
2083 if (evsel) {
2084 open_return = perf_evsel__open(evsel, NULL, tmap);
2085 ret = open_return >= 0;
2086
2087 if (open_return == -EACCES) {
2088 /*
2089 * This happens if the paranoid value
2090 * /proc/sys/kernel/perf_event_paranoid is set to 2
2091 * Re-run with exclude_kernel set; we don't do that
2092 * by default as some ARM machines do not support it.
2093 *
2094 */
2095 evsel->attr.exclude_kernel = 1;
2096 ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2097 }
2098 perf_evsel__delete(evsel);
2099 }
2100
2101 return ret;
2102 }
2103
2104 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2105 bool name_only)
2106 {
2107 struct probe_cache *pcache;
2108 struct probe_cache_entry *ent;
2109 struct strlist *bidlist, *sdtlist;
2110 struct strlist_config cfg = {.dont_dupstr = true};
2111 struct str_node *nd, *nd2;
2112 char *buf, *path, *ptr = NULL;
2113 bool show_detail = false;
2114 int ret;
2115
2116 sdtlist = strlist__new(NULL, &cfg);
2117 if (!sdtlist) {
2118 pr_debug("Failed to allocate new strlist for SDT\n");
2119 return;
2120 }
2121 bidlist = build_id_cache__list_all(true);
2122 if (!bidlist) {
2123 pr_debug("Failed to get buildids: %d\n", errno);
2124 return;
2125 }
2126 strlist__for_each_entry(nd, bidlist) {
2127 pcache = probe_cache__new(nd->s);
2128 if (!pcache)
2129 continue;
2130 list_for_each_entry(ent, &pcache->entries, node) {
2131 if (!ent->sdt)
2132 continue;
2133 if (subsys_glob &&
2134 !strglobmatch(ent->pev.group, subsys_glob))
2135 continue;
2136 if (event_glob &&
2137 !strglobmatch(ent->pev.event, event_glob))
2138 continue;
2139 ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2140 ent->pev.event, nd->s);
2141 if (ret > 0)
2142 strlist__add(sdtlist, buf);
2143 }
2144 probe_cache__delete(pcache);
2145 }
2146 strlist__delete(bidlist);
2147
2148 strlist__for_each_entry(nd, sdtlist) {
2149 buf = strchr(nd->s, '@');
2150 if (buf)
2151 *(buf++) = '\0';
2152 if (name_only) {
2153 printf("%s ", nd->s);
2154 continue;
2155 }
2156 nd2 = strlist__next(nd);
2157 if (nd2) {
2158 ptr = strchr(nd2->s, '@');
2159 if (ptr)
2160 *ptr = '\0';
2161 if (strcmp(nd->s, nd2->s) == 0)
2162 show_detail = true;
2163 }
2164 if (show_detail) {
2165 path = build_id_cache__origname(buf);
2166 ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2167 if (ret > 0) {
2168 printf(" %-50s [%s]\n", buf, "SDT event");
2169 free(buf);
2170 }
2171 } else
2172 printf(" %-50s [%s]\n", nd->s, "SDT event");
2173 if (nd2) {
2174 if (strcmp(nd->s, nd2->s) != 0)
2175 show_detail = false;
2176 if (ptr)
2177 *ptr = '@';
2178 }
2179 }
2180 strlist__delete(sdtlist);
2181 }
2182
2183 int print_hwcache_events(const char *event_glob, bool name_only)
2184 {
2185 unsigned int type, op, i, evt_i = 0, evt_num = 0;
2186 char name[64];
2187 char **evt_list = NULL;
2188 bool evt_num_known = false;
2189
2190 restart:
2191 if (evt_num_known) {
2192 evt_list = zalloc(sizeof(char *) * evt_num);
2193 if (!evt_list)
2194 goto out_enomem;
2195 }
2196
2197 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2198 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2199 /* skip invalid cache type */
2200 if (!perf_evsel__is_cache_op_valid(type, op))
2201 continue;
2202
2203 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2204 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2205 name, sizeof(name));
2206 if (event_glob != NULL && !strglobmatch(name, event_glob))
2207 continue;
2208
2209 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2210 type | (op << 8) | (i << 16)))
2211 continue;
2212
2213 if (!evt_num_known) {
2214 evt_num++;
2215 continue;
2216 }
2217
2218 evt_list[evt_i] = strdup(name);
2219 if (evt_list[evt_i] == NULL)
2220 goto out_enomem;
2221 evt_i++;
2222 }
2223 }
2224 }
2225
2226 if (!evt_num_known) {
2227 evt_num_known = true;
2228 goto restart;
2229 }
2230 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2231 evt_i = 0;
2232 while (evt_i < evt_num) {
2233 if (name_only) {
2234 printf("%s ", evt_list[evt_i++]);
2235 continue;
2236 }
2237 printf(" %-50s [%s]\n", evt_list[evt_i++],
2238 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2239 }
2240 if (evt_num && pager_in_use())
2241 printf("\n");
2242
2243 out_free:
2244 evt_num = evt_i;
2245 for (evt_i = 0; evt_i < evt_num; evt_i++)
2246 zfree(&evt_list[evt_i]);
2247 zfree(&evt_list);
2248 return evt_num;
2249
2250 out_enomem:
2251 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2252 if (evt_list)
2253 goto out_free;
2254 return evt_num;
2255 }
2256
2257 void print_symbol_events(const char *event_glob, unsigned type,
2258 struct event_symbol *syms, unsigned max,
2259 bool name_only)
2260 {
2261 unsigned int i, evt_i = 0, evt_num = 0;
2262 char name[MAX_NAME_LEN];
2263 char **evt_list = NULL;
2264 bool evt_num_known = false;
2265
2266 restart:
2267 if (evt_num_known) {
2268 evt_list = zalloc(sizeof(char *) * evt_num);
2269 if (!evt_list)
2270 goto out_enomem;
2271 syms -= max;
2272 }
2273
2274 for (i = 0; i < max; i++, syms++) {
2275
2276 if (event_glob != NULL && syms->symbol != NULL &&
2277 !(strglobmatch(syms->symbol, event_glob) ||
2278 (syms->alias && strglobmatch(syms->alias, event_glob))))
2279 continue;
2280
2281 if (!is_event_supported(type, i))
2282 continue;
2283
2284 if (!evt_num_known) {
2285 evt_num++;
2286 continue;
2287 }
2288
2289 if (!name_only && strlen(syms->alias))
2290 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2291 else
2292 strncpy(name, syms->symbol, MAX_NAME_LEN);
2293
2294 evt_list[evt_i] = strdup(name);
2295 if (evt_list[evt_i] == NULL)
2296 goto out_enomem;
2297 evt_i++;
2298 }
2299
2300 if (!evt_num_known) {
2301 evt_num_known = true;
2302 goto restart;
2303 }
2304 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2305 evt_i = 0;
2306 while (evt_i < evt_num) {
2307 if (name_only) {
2308 printf("%s ", evt_list[evt_i++]);
2309 continue;
2310 }
2311 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2312 }
2313 if (evt_num && pager_in_use())
2314 printf("\n");
2315
2316 out_free:
2317 evt_num = evt_i;
2318 for (evt_i = 0; evt_i < evt_num; evt_i++)
2319 zfree(&evt_list[evt_i]);
2320 zfree(&evt_list);
2321 return;
2322
2323 out_enomem:
2324 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2325 if (evt_list)
2326 goto out_free;
2327 }
2328
2329 /*
2330 * Print the help text for the event symbols:
2331 */
2332 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2333 bool long_desc, bool details_flag)
2334 {
2335 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2336 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2337
2338 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2339 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2340
2341 print_hwcache_events(event_glob, name_only);
2342
2343 print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2344 details_flag);
2345
2346 if (event_glob != NULL)
2347 return;
2348
2349 if (!name_only) {
2350 printf(" %-50s [%s]\n",
2351 "rNNN",
2352 event_type_descriptors[PERF_TYPE_RAW]);
2353 printf(" %-50s [%s]\n",
2354 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2355 event_type_descriptors[PERF_TYPE_RAW]);
2356 if (pager_in_use())
2357 printf(" (see 'man perf-list' on how to encode it)\n\n");
2358
2359 printf(" %-50s [%s]\n",
2360 "mem:<addr>[/len][:access]",
2361 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2362 if (pager_in_use())
2363 printf("\n");
2364 }
2365
2366 print_tracepoint_events(NULL, NULL, name_only);
2367
2368 print_sdt_events(NULL, NULL, name_only);
2369 }
2370
2371 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2372 {
2373 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2374 }
2375
2376 static int new_term(struct parse_events_term **_term,
2377 struct parse_events_term *temp,
2378 char *str, u64 num)
2379 {
2380 struct parse_events_term *term;
2381
2382 term = malloc(sizeof(*term));
2383 if (!term)
2384 return -ENOMEM;
2385
2386 *term = *temp;
2387 INIT_LIST_HEAD(&term->list);
2388
2389 switch (term->type_val) {
2390 case PARSE_EVENTS__TERM_TYPE_NUM:
2391 term->val.num = num;
2392 break;
2393 case PARSE_EVENTS__TERM_TYPE_STR:
2394 term->val.str = str;
2395 break;
2396 default:
2397 free(term);
2398 return -EINVAL;
2399 }
2400
2401 *_term = term;
2402 return 0;
2403 }
2404
2405 int parse_events_term__num(struct parse_events_term **term,
2406 int type_term, char *config, u64 num,
2407 bool no_value,
2408 void *loc_term_, void *loc_val_)
2409 {
2410 YYLTYPE *loc_term = loc_term_;
2411 YYLTYPE *loc_val = loc_val_;
2412
2413 struct parse_events_term temp = {
2414 .type_val = PARSE_EVENTS__TERM_TYPE_NUM,
2415 .type_term = type_term,
2416 .config = config,
2417 .no_value = no_value,
2418 .err_term = loc_term ? loc_term->first_column : 0,
2419 .err_val = loc_val ? loc_val->first_column : 0,
2420 };
2421
2422 return new_term(term, &temp, NULL, num);
2423 }
2424
2425 int parse_events_term__str(struct parse_events_term **term,
2426 int type_term, char *config, char *str,
2427 void *loc_term_, void *loc_val_)
2428 {
2429 YYLTYPE *loc_term = loc_term_;
2430 YYLTYPE *loc_val = loc_val_;
2431
2432 struct parse_events_term temp = {
2433 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
2434 .type_term = type_term,
2435 .config = config,
2436 .err_term = loc_term ? loc_term->first_column : 0,
2437 .err_val = loc_val ? loc_val->first_column : 0,
2438 };
2439
2440 return new_term(term, &temp, str, 0);
2441 }
2442
2443 int parse_events_term__sym_hw(struct parse_events_term **term,
2444 char *config, unsigned idx)
2445 {
2446 struct event_symbol *sym;
2447 struct parse_events_term temp = {
2448 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
2449 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2450 .config = config ?: (char *) "event",
2451 };
2452
2453 BUG_ON(idx >= PERF_COUNT_HW_MAX);
2454 sym = &event_symbols_hw[idx];
2455
2456 return new_term(term, &temp, (char *) sym->symbol, 0);
2457 }
2458
2459 int parse_events_term__clone(struct parse_events_term **new,
2460 struct parse_events_term *term)
2461 {
2462 struct parse_events_term temp = {
2463 .type_val = term->type_val,
2464 .type_term = term->type_term,
2465 .config = term->config,
2466 .err_term = term->err_term,
2467 .err_val = term->err_val,
2468 };
2469
2470 return new_term(new, &temp, term->val.str, term->val.num);
2471 }
2472
2473 int parse_events_copy_term_list(struct list_head *old,
2474 struct list_head **new)
2475 {
2476 struct parse_events_term *term, *n;
2477 int ret;
2478
2479 if (!old) {
2480 *new = NULL;
2481 return 0;
2482 }
2483
2484 *new = malloc(sizeof(struct list_head));
2485 if (!*new)
2486 return -ENOMEM;
2487 INIT_LIST_HEAD(*new);
2488
2489 list_for_each_entry (term, old, list) {
2490 ret = parse_events_term__clone(&n, term);
2491 if (ret)
2492 return ret;
2493 list_add_tail(&n->list, *new);
2494 }
2495 return 0;
2496 }
2497
2498 void parse_events_terms__purge(struct list_head *terms)
2499 {
2500 struct parse_events_term *term, *h;
2501
2502 list_for_each_entry_safe(term, h, terms, list) {
2503 if (term->array.nr_ranges)
2504 zfree(&term->array.ranges);
2505 list_del_init(&term->list);
2506 free(term);
2507 }
2508 }
2509
2510 void parse_events_terms__delete(struct list_head *terms)
2511 {
2512 if (!terms)
2513 return;
2514 parse_events_terms__purge(terms);
2515 free(terms);
2516 }
2517
2518 void parse_events__clear_array(struct parse_events_array *a)
2519 {
2520 zfree(&a->ranges);
2521 }
2522
2523 void parse_events_evlist_error(struct parse_events_evlist *data,
2524 int idx, const char *str)
2525 {
2526 struct parse_events_error *err = data->error;
2527
2528 if (!err)
2529 return;
2530 err->idx = idx;
2531 err->str = strdup(str);
2532 WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2533 }
2534
2535 static void config_terms_list(char *buf, size_t buf_sz)
2536 {
2537 int i;
2538 bool first = true;
2539
2540 buf[0] = '\0';
2541 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2542 const char *name = config_term_names[i];
2543
2544 if (!config_term_avail(i, NULL))
2545 continue;
2546 if (!name)
2547 continue;
2548 if (name[0] == '<')
2549 continue;
2550
2551 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2552 return;
2553
2554 if (!first)
2555 strcat(buf, ",");
2556 else
2557 first = false;
2558 strcat(buf, name);
2559 }
2560 }
2561
2562 /*
2563 * Return string contains valid config terms of an event.
2564 * @additional_terms: For terms such as PMU sysfs terms.
2565 */
2566 char *parse_events_formats_error_string(char *additional_terms)
2567 {
2568 char *str;
2569 /* "no-overwrite" is the longest name */
2570 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2571 (sizeof("no-overwrite") - 1)];
2572
2573 config_terms_list(static_terms, sizeof(static_terms));
2574 /* valid terms */
2575 if (additional_terms) {
2576 if (asprintf(&str, "valid terms: %s,%s",
2577 additional_terms, static_terms) < 0)
2578 goto fail;
2579 } else {
2580 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2581 goto fail;
2582 }
2583 return str;
2584
2585 fail:
2586 return NULL;
2587 }
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