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Merge branch 'for-linus-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
[deliverable/linux.git] / tools / perf / util / parse-events.c
1 #include <linux/hw_breakpoint.h>
2 #include <linux/err.h>
3 #include "util.h"
4 #include "../perf.h"
5 #include "evlist.h"
6 #include "evsel.h"
7 #include "parse-options.h"
8 #include "parse-events.h"
9 #include "exec_cmd.h"
10 #include "string.h"
11 #include "symbol.h"
12 #include "cache.h"
13 #include "header.h"
14 #include "bpf-loader.h"
15 #include "debug.h"
16 #include <api/fs/tracing_path.h>
17 #include "parse-events-bison.h"
18 #define YY_EXTRA_TYPE int
19 #include "parse-events-flex.h"
20 #include "pmu.h"
21 #include "thread_map.h"
22 #include "cpumap.h"
23 #include "asm/bug.h"
24
25 #define MAX_NAME_LEN 100
26
27 #ifdef PARSER_DEBUG
28 extern int parse_events_debug;
29 #endif
30 int parse_events_parse(void *data, void *scanner);
31 static int get_config_terms(struct list_head *head_config,
32 struct list_head *head_terms __maybe_unused);
33
34 static struct perf_pmu_event_symbol *perf_pmu_events_list;
35 /*
36 * The variable indicates the number of supported pmu event symbols.
37 * 0 means not initialized and ready to init
38 * -1 means failed to init, don't try anymore
39 * >0 is the number of supported pmu event symbols
40 */
41 static int perf_pmu_events_list_num;
42
43 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
44 [PERF_COUNT_HW_CPU_CYCLES] = {
45 .symbol = "cpu-cycles",
46 .alias = "cycles",
47 },
48 [PERF_COUNT_HW_INSTRUCTIONS] = {
49 .symbol = "instructions",
50 .alias = "",
51 },
52 [PERF_COUNT_HW_CACHE_REFERENCES] = {
53 .symbol = "cache-references",
54 .alias = "",
55 },
56 [PERF_COUNT_HW_CACHE_MISSES] = {
57 .symbol = "cache-misses",
58 .alias = "",
59 },
60 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
61 .symbol = "branch-instructions",
62 .alias = "branches",
63 },
64 [PERF_COUNT_HW_BRANCH_MISSES] = {
65 .symbol = "branch-misses",
66 .alias = "",
67 },
68 [PERF_COUNT_HW_BUS_CYCLES] = {
69 .symbol = "bus-cycles",
70 .alias = "",
71 },
72 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
73 .symbol = "stalled-cycles-frontend",
74 .alias = "idle-cycles-frontend",
75 },
76 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
77 .symbol = "stalled-cycles-backend",
78 .alias = "idle-cycles-backend",
79 },
80 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
81 .symbol = "ref-cycles",
82 .alias = "",
83 },
84 };
85
86 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
87 [PERF_COUNT_SW_CPU_CLOCK] = {
88 .symbol = "cpu-clock",
89 .alias = "",
90 },
91 [PERF_COUNT_SW_TASK_CLOCK] = {
92 .symbol = "task-clock",
93 .alias = "",
94 },
95 [PERF_COUNT_SW_PAGE_FAULTS] = {
96 .symbol = "page-faults",
97 .alias = "faults",
98 },
99 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
100 .symbol = "context-switches",
101 .alias = "cs",
102 },
103 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
104 .symbol = "cpu-migrations",
105 .alias = "migrations",
106 },
107 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
108 .symbol = "minor-faults",
109 .alias = "",
110 },
111 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
112 .symbol = "major-faults",
113 .alias = "",
114 },
115 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
116 .symbol = "alignment-faults",
117 .alias = "",
118 },
119 [PERF_COUNT_SW_EMULATION_FAULTS] = {
120 .symbol = "emulation-faults",
121 .alias = "",
122 },
123 [PERF_COUNT_SW_DUMMY] = {
124 .symbol = "dummy",
125 .alias = "",
126 },
127 };
128
129 #define __PERF_EVENT_FIELD(config, name) \
130 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
131
132 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
133 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
134 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
135 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
136
137 #define for_each_subsystem(sys_dir, sys_dirent, sys_next) \
138 while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \
139 if (sys_dirent.d_type == DT_DIR && \
140 (strcmp(sys_dirent.d_name, ".")) && \
141 (strcmp(sys_dirent.d_name, "..")))
142
143 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
144 {
145 char evt_path[MAXPATHLEN];
146 int fd;
147
148 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
149 sys_dir->d_name, evt_dir->d_name);
150 fd = open(evt_path, O_RDONLY);
151 if (fd < 0)
152 return -EINVAL;
153 close(fd);
154
155 return 0;
156 }
157
158 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) \
159 while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \
160 if (evt_dirent.d_type == DT_DIR && \
161 (strcmp(evt_dirent.d_name, ".")) && \
162 (strcmp(evt_dirent.d_name, "..")) && \
163 (!tp_event_has_id(&sys_dirent, &evt_dirent)))
164
165 #define MAX_EVENT_LENGTH 512
166
167
168 struct tracepoint_path *tracepoint_id_to_path(u64 config)
169 {
170 struct tracepoint_path *path = NULL;
171 DIR *sys_dir, *evt_dir;
172 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
173 char id_buf[24];
174 int fd;
175 u64 id;
176 char evt_path[MAXPATHLEN];
177 char dir_path[MAXPATHLEN];
178
179 sys_dir = opendir(tracing_events_path);
180 if (!sys_dir)
181 return NULL;
182
183 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
184
185 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
186 sys_dirent.d_name);
187 evt_dir = opendir(dir_path);
188 if (!evt_dir)
189 continue;
190
191 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
192
193 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
194 evt_dirent.d_name);
195 fd = open(evt_path, O_RDONLY);
196 if (fd < 0)
197 continue;
198 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
199 close(fd);
200 continue;
201 }
202 close(fd);
203 id = atoll(id_buf);
204 if (id == config) {
205 closedir(evt_dir);
206 closedir(sys_dir);
207 path = zalloc(sizeof(*path));
208 path->system = malloc(MAX_EVENT_LENGTH);
209 if (!path->system) {
210 free(path);
211 return NULL;
212 }
213 path->name = malloc(MAX_EVENT_LENGTH);
214 if (!path->name) {
215 zfree(&path->system);
216 free(path);
217 return NULL;
218 }
219 strncpy(path->system, sys_dirent.d_name,
220 MAX_EVENT_LENGTH);
221 strncpy(path->name, evt_dirent.d_name,
222 MAX_EVENT_LENGTH);
223 return path;
224 }
225 }
226 closedir(evt_dir);
227 }
228
229 closedir(sys_dir);
230 return NULL;
231 }
232
233 struct tracepoint_path *tracepoint_name_to_path(const char *name)
234 {
235 struct tracepoint_path *path = zalloc(sizeof(*path));
236 char *str = strchr(name, ':');
237
238 if (path == NULL || str == NULL) {
239 free(path);
240 return NULL;
241 }
242
243 path->system = strndup(name, str - name);
244 path->name = strdup(str+1);
245
246 if (path->system == NULL || path->name == NULL) {
247 zfree(&path->system);
248 zfree(&path->name);
249 free(path);
250 path = NULL;
251 }
252
253 return path;
254 }
255
256 const char *event_type(int type)
257 {
258 switch (type) {
259 case PERF_TYPE_HARDWARE:
260 return "hardware";
261
262 case PERF_TYPE_SOFTWARE:
263 return "software";
264
265 case PERF_TYPE_TRACEPOINT:
266 return "tracepoint";
267
268 case PERF_TYPE_HW_CACHE:
269 return "hardware-cache";
270
271 default:
272 break;
273 }
274
275 return "unknown";
276 }
277
278
279
280 static struct perf_evsel *
281 __add_event(struct list_head *list, int *idx,
282 struct perf_event_attr *attr,
283 char *name, struct cpu_map *cpus,
284 struct list_head *config_terms)
285 {
286 struct perf_evsel *evsel;
287
288 event_attr_init(attr);
289
290 evsel = perf_evsel__new_idx(attr, (*idx)++);
291 if (!evsel)
292 return NULL;
293
294 evsel->cpus = cpu_map__get(cpus);
295 evsel->own_cpus = cpu_map__get(cpus);
296
297 if (name)
298 evsel->name = strdup(name);
299
300 if (config_terms)
301 list_splice(config_terms, &evsel->config_terms);
302
303 list_add_tail(&evsel->node, list);
304 return evsel;
305 }
306
307 static int add_event(struct list_head *list, int *idx,
308 struct perf_event_attr *attr, char *name,
309 struct list_head *config_terms)
310 {
311 return __add_event(list, idx, attr, name, NULL, config_terms) ? 0 : -ENOMEM;
312 }
313
314 static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
315 {
316 int i, j;
317 int n, longest = -1;
318
319 for (i = 0; i < size; i++) {
320 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
321 n = strlen(names[i][j]);
322 if (n > longest && !strncasecmp(str, names[i][j], n))
323 longest = n;
324 }
325 if (longest > 0)
326 return i;
327 }
328
329 return -1;
330 }
331
332 int parse_events_add_cache(struct list_head *list, int *idx,
333 char *type, char *op_result1, char *op_result2)
334 {
335 struct perf_event_attr attr;
336 char name[MAX_NAME_LEN];
337 int cache_type = -1, cache_op = -1, cache_result = -1;
338 char *op_result[2] = { op_result1, op_result2 };
339 int i, n;
340
341 /*
342 * No fallback - if we cannot get a clear cache type
343 * then bail out:
344 */
345 cache_type = parse_aliases(type, perf_evsel__hw_cache,
346 PERF_COUNT_HW_CACHE_MAX);
347 if (cache_type == -1)
348 return -EINVAL;
349
350 n = snprintf(name, MAX_NAME_LEN, "%s", type);
351
352 for (i = 0; (i < 2) && (op_result[i]); i++) {
353 char *str = op_result[i];
354
355 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
356
357 if (cache_op == -1) {
358 cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
359 PERF_COUNT_HW_CACHE_OP_MAX);
360 if (cache_op >= 0) {
361 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
362 return -EINVAL;
363 continue;
364 }
365 }
366
367 if (cache_result == -1) {
368 cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
369 PERF_COUNT_HW_CACHE_RESULT_MAX);
370 if (cache_result >= 0)
371 continue;
372 }
373 }
374
375 /*
376 * Fall back to reads:
377 */
378 if (cache_op == -1)
379 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
380
381 /*
382 * Fall back to accesses:
383 */
384 if (cache_result == -1)
385 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
386
387 memset(&attr, 0, sizeof(attr));
388 attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
389 attr.type = PERF_TYPE_HW_CACHE;
390 return add_event(list, idx, &attr, name, NULL);
391 }
392
393 static void tracepoint_error(struct parse_events_error *e, int err,
394 char *sys, char *name)
395 {
396 char help[BUFSIZ];
397
398 /*
399 * We get error directly from syscall errno ( > 0),
400 * or from encoded pointer's error ( < 0).
401 */
402 err = abs(err);
403
404 switch (err) {
405 case EACCES:
406 e->str = strdup("can't access trace events");
407 break;
408 case ENOENT:
409 e->str = strdup("unknown tracepoint");
410 break;
411 default:
412 e->str = strdup("failed to add tracepoint");
413 break;
414 }
415
416 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
417 e->help = strdup(help);
418 }
419
420 static int add_tracepoint(struct list_head *list, int *idx,
421 char *sys_name, char *evt_name,
422 struct parse_events_error *err,
423 struct list_head *head_config)
424 {
425 struct perf_evsel *evsel;
426
427 evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
428 if (IS_ERR(evsel)) {
429 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
430 return PTR_ERR(evsel);
431 }
432
433 if (head_config) {
434 LIST_HEAD(config_terms);
435
436 if (get_config_terms(head_config, &config_terms))
437 return -ENOMEM;
438 list_splice(&config_terms, &evsel->config_terms);
439 }
440
441 list_add_tail(&evsel->node, list);
442 return 0;
443 }
444
445 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
446 char *sys_name, char *evt_name,
447 struct parse_events_error *err,
448 struct list_head *head_config)
449 {
450 char evt_path[MAXPATHLEN];
451 struct dirent *evt_ent;
452 DIR *evt_dir;
453 int ret = 0, found = 0;
454
455 snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
456 evt_dir = opendir(evt_path);
457 if (!evt_dir) {
458 tracepoint_error(err, errno, sys_name, evt_name);
459 return -1;
460 }
461
462 while (!ret && (evt_ent = readdir(evt_dir))) {
463 if (!strcmp(evt_ent->d_name, ".")
464 || !strcmp(evt_ent->d_name, "..")
465 || !strcmp(evt_ent->d_name, "enable")
466 || !strcmp(evt_ent->d_name, "filter"))
467 continue;
468
469 if (!strglobmatch(evt_ent->d_name, evt_name))
470 continue;
471
472 found++;
473
474 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
475 err, head_config);
476 }
477
478 if (!found) {
479 tracepoint_error(err, ENOENT, sys_name, evt_name);
480 ret = -1;
481 }
482
483 closedir(evt_dir);
484 return ret;
485 }
486
487 static int add_tracepoint_event(struct list_head *list, int *idx,
488 char *sys_name, char *evt_name,
489 struct parse_events_error *err,
490 struct list_head *head_config)
491 {
492 return strpbrk(evt_name, "*?") ?
493 add_tracepoint_multi_event(list, idx, sys_name, evt_name,
494 err, head_config) :
495 add_tracepoint(list, idx, sys_name, evt_name,
496 err, head_config);
497 }
498
499 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
500 char *sys_name, char *evt_name,
501 struct parse_events_error *err,
502 struct list_head *head_config)
503 {
504 struct dirent *events_ent;
505 DIR *events_dir;
506 int ret = 0;
507
508 events_dir = opendir(tracing_events_path);
509 if (!events_dir) {
510 tracepoint_error(err, errno, sys_name, evt_name);
511 return -1;
512 }
513
514 while (!ret && (events_ent = readdir(events_dir))) {
515 if (!strcmp(events_ent->d_name, ".")
516 || !strcmp(events_ent->d_name, "..")
517 || !strcmp(events_ent->d_name, "enable")
518 || !strcmp(events_ent->d_name, "header_event")
519 || !strcmp(events_ent->d_name, "header_page"))
520 continue;
521
522 if (!strglobmatch(events_ent->d_name, sys_name))
523 continue;
524
525 ret = add_tracepoint_event(list, idx, events_ent->d_name,
526 evt_name, err, head_config);
527 }
528
529 closedir(events_dir);
530 return ret;
531 }
532
533 struct __add_bpf_event_param {
534 struct parse_events_evlist *data;
535 struct list_head *list;
536 };
537
538 static int add_bpf_event(struct probe_trace_event *tev, int fd,
539 void *_param)
540 {
541 LIST_HEAD(new_evsels);
542 struct __add_bpf_event_param *param = _param;
543 struct parse_events_evlist *evlist = param->data;
544 struct list_head *list = param->list;
545 struct perf_evsel *pos;
546 int err;
547
548 pr_debug("add bpf event %s:%s and attach bpf program %d\n",
549 tev->group, tev->event, fd);
550
551 err = parse_events_add_tracepoint(&new_evsels, &evlist->idx, tev->group,
552 tev->event, evlist->error, NULL);
553 if (err) {
554 struct perf_evsel *evsel, *tmp;
555
556 pr_debug("Failed to add BPF event %s:%s\n",
557 tev->group, tev->event);
558 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
559 list_del(&evsel->node);
560 perf_evsel__delete(evsel);
561 }
562 return err;
563 }
564 pr_debug("adding %s:%s\n", tev->group, tev->event);
565
566 list_for_each_entry(pos, &new_evsels, node) {
567 pr_debug("adding %s:%s to %p\n",
568 tev->group, tev->event, pos);
569 pos->bpf_fd = fd;
570 }
571 list_splice(&new_evsels, list);
572 return 0;
573 }
574
575 int parse_events_load_bpf_obj(struct parse_events_evlist *data,
576 struct list_head *list,
577 struct bpf_object *obj)
578 {
579 int err;
580 char errbuf[BUFSIZ];
581 struct __add_bpf_event_param param = {data, list};
582 static bool registered_unprobe_atexit = false;
583
584 if (IS_ERR(obj) || !obj) {
585 snprintf(errbuf, sizeof(errbuf),
586 "Internal error: load bpf obj with NULL");
587 err = -EINVAL;
588 goto errout;
589 }
590
591 /*
592 * Register atexit handler before calling bpf__probe() so
593 * bpf__probe() don't need to unprobe probe points its already
594 * created when failure.
595 */
596 if (!registered_unprobe_atexit) {
597 atexit(bpf__clear);
598 registered_unprobe_atexit = true;
599 }
600
601 err = bpf__probe(obj);
602 if (err) {
603 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
604 goto errout;
605 }
606
607 err = bpf__load(obj);
608 if (err) {
609 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
610 goto errout;
611 }
612
613 err = bpf__foreach_tev(obj, add_bpf_event, &param);
614 if (err) {
615 snprintf(errbuf, sizeof(errbuf),
616 "Attach events in BPF object failed");
617 goto errout;
618 }
619
620 return 0;
621 errout:
622 data->error->help = strdup("(add -v to see detail)");
623 data->error->str = strdup(errbuf);
624 return err;
625 }
626
627 int parse_events_load_bpf(struct parse_events_evlist *data,
628 struct list_head *list,
629 char *bpf_file_name,
630 bool source)
631 {
632 struct bpf_object *obj;
633
634 obj = bpf__prepare_load(bpf_file_name, source);
635 if (IS_ERR(obj)) {
636 char errbuf[BUFSIZ];
637 int err;
638
639 err = PTR_ERR(obj);
640
641 if (err == -ENOTSUP)
642 snprintf(errbuf, sizeof(errbuf),
643 "BPF support is not compiled");
644 else
645 bpf__strerror_prepare_load(bpf_file_name,
646 source,
647 -err, errbuf,
648 sizeof(errbuf));
649
650 data->error->help = strdup("(add -v to see detail)");
651 data->error->str = strdup(errbuf);
652 return err;
653 }
654
655 return parse_events_load_bpf_obj(data, list, obj);
656 }
657
658 static int
659 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
660 {
661 int i;
662
663 for (i = 0; i < 3; i++) {
664 if (!type || !type[i])
665 break;
666
667 #define CHECK_SET_TYPE(bit) \
668 do { \
669 if (attr->bp_type & bit) \
670 return -EINVAL; \
671 else \
672 attr->bp_type |= bit; \
673 } while (0)
674
675 switch (type[i]) {
676 case 'r':
677 CHECK_SET_TYPE(HW_BREAKPOINT_R);
678 break;
679 case 'w':
680 CHECK_SET_TYPE(HW_BREAKPOINT_W);
681 break;
682 case 'x':
683 CHECK_SET_TYPE(HW_BREAKPOINT_X);
684 break;
685 default:
686 return -EINVAL;
687 }
688 }
689
690 #undef CHECK_SET_TYPE
691
692 if (!attr->bp_type) /* Default */
693 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
694
695 return 0;
696 }
697
698 int parse_events_add_breakpoint(struct list_head *list, int *idx,
699 void *ptr, char *type, u64 len)
700 {
701 struct perf_event_attr attr;
702
703 memset(&attr, 0, sizeof(attr));
704 attr.bp_addr = (unsigned long) ptr;
705
706 if (parse_breakpoint_type(type, &attr))
707 return -EINVAL;
708
709 /* Provide some defaults if len is not specified */
710 if (!len) {
711 if (attr.bp_type == HW_BREAKPOINT_X)
712 len = sizeof(long);
713 else
714 len = HW_BREAKPOINT_LEN_4;
715 }
716
717 attr.bp_len = len;
718
719 attr.type = PERF_TYPE_BREAKPOINT;
720 attr.sample_period = 1;
721
722 return add_event(list, idx, &attr, NULL, NULL);
723 }
724
725 static int check_type_val(struct parse_events_term *term,
726 struct parse_events_error *err,
727 int type)
728 {
729 if (type == term->type_val)
730 return 0;
731
732 if (err) {
733 err->idx = term->err_val;
734 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
735 err->str = strdup("expected numeric value");
736 else
737 err->str = strdup("expected string value");
738 }
739 return -EINVAL;
740 }
741
742 typedef int config_term_func_t(struct perf_event_attr *attr,
743 struct parse_events_term *term,
744 struct parse_events_error *err);
745
746 static int config_term_common(struct perf_event_attr *attr,
747 struct parse_events_term *term,
748 struct parse_events_error *err)
749 {
750 #define CHECK_TYPE_VAL(type) \
751 do { \
752 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
753 return -EINVAL; \
754 } while (0)
755
756 switch (term->type_term) {
757 case PARSE_EVENTS__TERM_TYPE_CONFIG:
758 CHECK_TYPE_VAL(NUM);
759 attr->config = term->val.num;
760 break;
761 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
762 CHECK_TYPE_VAL(NUM);
763 attr->config1 = term->val.num;
764 break;
765 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
766 CHECK_TYPE_VAL(NUM);
767 attr->config2 = term->val.num;
768 break;
769 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
770 CHECK_TYPE_VAL(NUM);
771 break;
772 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
773 CHECK_TYPE_VAL(NUM);
774 break;
775 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
776 /*
777 * TODO uncomment when the field is available
778 * attr->branch_sample_type = term->val.num;
779 */
780 break;
781 case PARSE_EVENTS__TERM_TYPE_TIME:
782 CHECK_TYPE_VAL(NUM);
783 if (term->val.num > 1) {
784 err->str = strdup("expected 0 or 1");
785 err->idx = term->err_val;
786 return -EINVAL;
787 }
788 break;
789 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
790 CHECK_TYPE_VAL(STR);
791 break;
792 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
793 CHECK_TYPE_VAL(NUM);
794 break;
795 case PARSE_EVENTS__TERM_TYPE_INHERIT:
796 CHECK_TYPE_VAL(NUM);
797 break;
798 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
799 CHECK_TYPE_VAL(NUM);
800 break;
801 case PARSE_EVENTS__TERM_TYPE_NAME:
802 CHECK_TYPE_VAL(STR);
803 break;
804 default:
805 err->str = strdup("unknown term");
806 err->idx = term->err_term;
807 err->help = parse_events_formats_error_string(NULL);
808 return -EINVAL;
809 }
810
811 return 0;
812 #undef CHECK_TYPE_VAL
813 }
814
815 static int config_term_pmu(struct perf_event_attr *attr,
816 struct parse_events_term *term,
817 struct parse_events_error *err)
818 {
819 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER)
820 /*
821 * Always succeed for sysfs terms, as we dont know
822 * at this point what type they need to have.
823 */
824 return 0;
825 else
826 return config_term_common(attr, term, err);
827 }
828
829 static int config_term_tracepoint(struct perf_event_attr *attr,
830 struct parse_events_term *term,
831 struct parse_events_error *err)
832 {
833 switch (term->type_term) {
834 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
835 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
836 case PARSE_EVENTS__TERM_TYPE_INHERIT:
837 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
838 return config_term_common(attr, term, err);
839 default:
840 if (err) {
841 err->idx = term->err_term;
842 err->str = strdup("unknown term");
843 err->help = strdup("valid terms: call-graph,stack-size\n");
844 }
845 return -EINVAL;
846 }
847
848 return 0;
849 }
850
851 static int config_attr(struct perf_event_attr *attr,
852 struct list_head *head,
853 struct parse_events_error *err,
854 config_term_func_t config_term)
855 {
856 struct parse_events_term *term;
857
858 list_for_each_entry(term, head, list)
859 if (config_term(attr, term, err))
860 return -EINVAL;
861
862 return 0;
863 }
864
865 static int get_config_terms(struct list_head *head_config,
866 struct list_head *head_terms __maybe_unused)
867 {
868 #define ADD_CONFIG_TERM(__type, __name, __val) \
869 do { \
870 struct perf_evsel_config_term *__t; \
871 \
872 __t = zalloc(sizeof(*__t)); \
873 if (!__t) \
874 return -ENOMEM; \
875 \
876 INIT_LIST_HEAD(&__t->list); \
877 __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
878 __t->val.__name = __val; \
879 list_add_tail(&__t->list, head_terms); \
880 } while (0)
881
882 struct parse_events_term *term;
883
884 list_for_each_entry(term, head_config, list) {
885 switch (term->type_term) {
886 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
887 ADD_CONFIG_TERM(PERIOD, period, term->val.num);
888 break;
889 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
890 ADD_CONFIG_TERM(FREQ, freq, term->val.num);
891 break;
892 case PARSE_EVENTS__TERM_TYPE_TIME:
893 ADD_CONFIG_TERM(TIME, time, term->val.num);
894 break;
895 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
896 ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
897 break;
898 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
899 ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
900 break;
901 case PARSE_EVENTS__TERM_TYPE_INHERIT:
902 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
903 break;
904 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
905 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
906 break;
907 default:
908 break;
909 }
910 }
911 #undef ADD_EVSEL_CONFIG
912 return 0;
913 }
914
915 int parse_events_add_tracepoint(struct list_head *list, int *idx,
916 char *sys, char *event,
917 struct parse_events_error *err,
918 struct list_head *head_config)
919 {
920 if (head_config) {
921 struct perf_event_attr attr;
922
923 if (config_attr(&attr, head_config, err,
924 config_term_tracepoint))
925 return -EINVAL;
926 }
927
928 if (strpbrk(sys, "*?"))
929 return add_tracepoint_multi_sys(list, idx, sys, event,
930 err, head_config);
931 else
932 return add_tracepoint_event(list, idx, sys, event,
933 err, head_config);
934 }
935
936 int parse_events_add_numeric(struct parse_events_evlist *data,
937 struct list_head *list,
938 u32 type, u64 config,
939 struct list_head *head_config)
940 {
941 struct perf_event_attr attr;
942 LIST_HEAD(config_terms);
943
944 memset(&attr, 0, sizeof(attr));
945 attr.type = type;
946 attr.config = config;
947
948 if (head_config) {
949 if (config_attr(&attr, head_config, data->error,
950 config_term_common))
951 return -EINVAL;
952
953 if (get_config_terms(head_config, &config_terms))
954 return -ENOMEM;
955 }
956
957 return add_event(list, &data->idx, &attr, NULL, &config_terms);
958 }
959
960 static int parse_events__is_name_term(struct parse_events_term *term)
961 {
962 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
963 }
964
965 static char *pmu_event_name(struct list_head *head_terms)
966 {
967 struct parse_events_term *term;
968
969 list_for_each_entry(term, head_terms, list)
970 if (parse_events__is_name_term(term))
971 return term->val.str;
972
973 return NULL;
974 }
975
976 int parse_events_add_pmu(struct parse_events_evlist *data,
977 struct list_head *list, char *name,
978 struct list_head *head_config)
979 {
980 struct perf_event_attr attr;
981 struct perf_pmu_info info;
982 struct perf_pmu *pmu;
983 struct perf_evsel *evsel;
984 LIST_HEAD(config_terms);
985
986 pmu = perf_pmu__find(name);
987 if (!pmu)
988 return -EINVAL;
989
990 if (pmu->default_config) {
991 memcpy(&attr, pmu->default_config,
992 sizeof(struct perf_event_attr));
993 } else {
994 memset(&attr, 0, sizeof(attr));
995 }
996
997 if (!head_config) {
998 attr.type = pmu->type;
999 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
1000 return evsel ? 0 : -ENOMEM;
1001 }
1002
1003 if (perf_pmu__check_alias(pmu, head_config, &info))
1004 return -EINVAL;
1005
1006 /*
1007 * Configure hardcoded terms first, no need to check
1008 * return value when called with fail == 0 ;)
1009 */
1010 if (config_attr(&attr, head_config, data->error, config_term_pmu))
1011 return -EINVAL;
1012
1013 if (get_config_terms(head_config, &config_terms))
1014 return -ENOMEM;
1015
1016 if (perf_pmu__config(pmu, &attr, head_config, data->error))
1017 return -EINVAL;
1018
1019 evsel = __add_event(list, &data->idx, &attr,
1020 pmu_event_name(head_config), pmu->cpus,
1021 &config_terms);
1022 if (evsel) {
1023 evsel->unit = info.unit;
1024 evsel->scale = info.scale;
1025 evsel->per_pkg = info.per_pkg;
1026 evsel->snapshot = info.snapshot;
1027 }
1028
1029 return evsel ? 0 : -ENOMEM;
1030 }
1031
1032 int parse_events__modifier_group(struct list_head *list,
1033 char *event_mod)
1034 {
1035 return parse_events__modifier_event(list, event_mod, true);
1036 }
1037
1038 void parse_events__set_leader(char *name, struct list_head *list)
1039 {
1040 struct perf_evsel *leader;
1041
1042 if (list_empty(list)) {
1043 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1044 return;
1045 }
1046
1047 __perf_evlist__set_leader(list);
1048 leader = list_entry(list->next, struct perf_evsel, node);
1049 leader->group_name = name ? strdup(name) : NULL;
1050 }
1051
1052 /* list_event is assumed to point to malloc'ed memory */
1053 void parse_events_update_lists(struct list_head *list_event,
1054 struct list_head *list_all)
1055 {
1056 /*
1057 * Called for single event definition. Update the
1058 * 'all event' list, and reinit the 'single event'
1059 * list, for next event definition.
1060 */
1061 list_splice_tail(list_event, list_all);
1062 free(list_event);
1063 }
1064
1065 struct event_modifier {
1066 int eu;
1067 int ek;
1068 int eh;
1069 int eH;
1070 int eG;
1071 int eI;
1072 int precise;
1073 int precise_max;
1074 int exclude_GH;
1075 int sample_read;
1076 int pinned;
1077 };
1078
1079 static int get_event_modifier(struct event_modifier *mod, char *str,
1080 struct perf_evsel *evsel)
1081 {
1082 int eu = evsel ? evsel->attr.exclude_user : 0;
1083 int ek = evsel ? evsel->attr.exclude_kernel : 0;
1084 int eh = evsel ? evsel->attr.exclude_hv : 0;
1085 int eH = evsel ? evsel->attr.exclude_host : 0;
1086 int eG = evsel ? evsel->attr.exclude_guest : 0;
1087 int eI = evsel ? evsel->attr.exclude_idle : 0;
1088 int precise = evsel ? evsel->attr.precise_ip : 0;
1089 int precise_max = 0;
1090 int sample_read = 0;
1091 int pinned = evsel ? evsel->attr.pinned : 0;
1092
1093 int exclude = eu | ek | eh;
1094 int exclude_GH = evsel ? evsel->exclude_GH : 0;
1095
1096 memset(mod, 0, sizeof(*mod));
1097
1098 while (*str) {
1099 if (*str == 'u') {
1100 if (!exclude)
1101 exclude = eu = ek = eh = 1;
1102 eu = 0;
1103 } else if (*str == 'k') {
1104 if (!exclude)
1105 exclude = eu = ek = eh = 1;
1106 ek = 0;
1107 } else if (*str == 'h') {
1108 if (!exclude)
1109 exclude = eu = ek = eh = 1;
1110 eh = 0;
1111 } else if (*str == 'G') {
1112 if (!exclude_GH)
1113 exclude_GH = eG = eH = 1;
1114 eG = 0;
1115 } else if (*str == 'H') {
1116 if (!exclude_GH)
1117 exclude_GH = eG = eH = 1;
1118 eH = 0;
1119 } else if (*str == 'I') {
1120 eI = 1;
1121 } else if (*str == 'p') {
1122 precise++;
1123 /* use of precise requires exclude_guest */
1124 if (!exclude_GH)
1125 eG = 1;
1126 } else if (*str == 'P') {
1127 precise_max = 1;
1128 } else if (*str == 'S') {
1129 sample_read = 1;
1130 } else if (*str == 'D') {
1131 pinned = 1;
1132 } else
1133 break;
1134
1135 ++str;
1136 }
1137
1138 /*
1139 * precise ip:
1140 *
1141 * 0 - SAMPLE_IP can have arbitrary skid
1142 * 1 - SAMPLE_IP must have constant skid
1143 * 2 - SAMPLE_IP requested to have 0 skid
1144 * 3 - SAMPLE_IP must have 0 skid
1145 *
1146 * See also PERF_RECORD_MISC_EXACT_IP
1147 */
1148 if (precise > 3)
1149 return -EINVAL;
1150
1151 mod->eu = eu;
1152 mod->ek = ek;
1153 mod->eh = eh;
1154 mod->eH = eH;
1155 mod->eG = eG;
1156 mod->eI = eI;
1157 mod->precise = precise;
1158 mod->precise_max = precise_max;
1159 mod->exclude_GH = exclude_GH;
1160 mod->sample_read = sample_read;
1161 mod->pinned = pinned;
1162
1163 return 0;
1164 }
1165
1166 /*
1167 * Basic modifier sanity check to validate it contains only one
1168 * instance of any modifier (apart from 'p') present.
1169 */
1170 static int check_modifier(char *str)
1171 {
1172 char *p = str;
1173
1174 /* The sizeof includes 0 byte as well. */
1175 if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1176 return -1;
1177
1178 while (*p) {
1179 if (*p != 'p' && strchr(p + 1, *p))
1180 return -1;
1181 p++;
1182 }
1183
1184 return 0;
1185 }
1186
1187 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1188 {
1189 struct perf_evsel *evsel;
1190 struct event_modifier mod;
1191
1192 if (str == NULL)
1193 return 0;
1194
1195 if (check_modifier(str))
1196 return -EINVAL;
1197
1198 if (!add && get_event_modifier(&mod, str, NULL))
1199 return -EINVAL;
1200
1201 __evlist__for_each(list, evsel) {
1202 if (add && get_event_modifier(&mod, str, evsel))
1203 return -EINVAL;
1204
1205 evsel->attr.exclude_user = mod.eu;
1206 evsel->attr.exclude_kernel = mod.ek;
1207 evsel->attr.exclude_hv = mod.eh;
1208 evsel->attr.precise_ip = mod.precise;
1209 evsel->attr.exclude_host = mod.eH;
1210 evsel->attr.exclude_guest = mod.eG;
1211 evsel->attr.exclude_idle = mod.eI;
1212 evsel->exclude_GH = mod.exclude_GH;
1213 evsel->sample_read = mod.sample_read;
1214 evsel->precise_max = mod.precise_max;
1215
1216 if (perf_evsel__is_group_leader(evsel))
1217 evsel->attr.pinned = mod.pinned;
1218 }
1219
1220 return 0;
1221 }
1222
1223 int parse_events_name(struct list_head *list, char *name)
1224 {
1225 struct perf_evsel *evsel;
1226
1227 __evlist__for_each(list, evsel) {
1228 if (!evsel->name)
1229 evsel->name = strdup(name);
1230 }
1231
1232 return 0;
1233 }
1234
1235 static int
1236 comp_pmu(const void *p1, const void *p2)
1237 {
1238 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1239 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1240
1241 return strcmp(pmu1->symbol, pmu2->symbol);
1242 }
1243
1244 static void perf_pmu__parse_cleanup(void)
1245 {
1246 if (perf_pmu_events_list_num > 0) {
1247 struct perf_pmu_event_symbol *p;
1248 int i;
1249
1250 for (i = 0; i < perf_pmu_events_list_num; i++) {
1251 p = perf_pmu_events_list + i;
1252 free(p->symbol);
1253 }
1254 free(perf_pmu_events_list);
1255 perf_pmu_events_list = NULL;
1256 perf_pmu_events_list_num = 0;
1257 }
1258 }
1259
1260 #define SET_SYMBOL(str, stype) \
1261 do { \
1262 p->symbol = str; \
1263 if (!p->symbol) \
1264 goto err; \
1265 p->type = stype; \
1266 } while (0)
1267
1268 /*
1269 * Read the pmu events list from sysfs
1270 * Save it into perf_pmu_events_list
1271 */
1272 static void perf_pmu__parse_init(void)
1273 {
1274
1275 struct perf_pmu *pmu = NULL;
1276 struct perf_pmu_alias *alias;
1277 int len = 0;
1278
1279 pmu = perf_pmu__find("cpu");
1280 if ((pmu == NULL) || list_empty(&pmu->aliases)) {
1281 perf_pmu_events_list_num = -1;
1282 return;
1283 }
1284 list_for_each_entry(alias, &pmu->aliases, list) {
1285 if (strchr(alias->name, '-'))
1286 len++;
1287 len++;
1288 }
1289 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1290 if (!perf_pmu_events_list)
1291 return;
1292 perf_pmu_events_list_num = len;
1293
1294 len = 0;
1295 list_for_each_entry(alias, &pmu->aliases, list) {
1296 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1297 char *tmp = strchr(alias->name, '-');
1298
1299 if (tmp != NULL) {
1300 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1301 PMU_EVENT_SYMBOL_PREFIX);
1302 p++;
1303 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1304 len += 2;
1305 } else {
1306 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1307 len++;
1308 }
1309 }
1310 qsort(perf_pmu_events_list, len,
1311 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1312
1313 return;
1314 err:
1315 perf_pmu__parse_cleanup();
1316 }
1317
1318 enum perf_pmu_event_symbol_type
1319 perf_pmu__parse_check(const char *name)
1320 {
1321 struct perf_pmu_event_symbol p, *r;
1322
1323 /* scan kernel pmu events from sysfs if needed */
1324 if (perf_pmu_events_list_num == 0)
1325 perf_pmu__parse_init();
1326 /*
1327 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1328 * cpu-cycles has been handled by hardcode.
1329 * So it must be cpu// events, not kernel pmu event.
1330 */
1331 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1332 return PMU_EVENT_SYMBOL_ERR;
1333
1334 p.symbol = strdup(name);
1335 r = bsearch(&p, perf_pmu_events_list,
1336 (size_t) perf_pmu_events_list_num,
1337 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1338 free(p.symbol);
1339 return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1340 }
1341
1342 static int parse_events__scanner(const char *str, void *data, int start_token)
1343 {
1344 YY_BUFFER_STATE buffer;
1345 void *scanner;
1346 int ret;
1347
1348 ret = parse_events_lex_init_extra(start_token, &scanner);
1349 if (ret)
1350 return ret;
1351
1352 buffer = parse_events__scan_string(str, scanner);
1353
1354 #ifdef PARSER_DEBUG
1355 parse_events_debug = 1;
1356 #endif
1357 ret = parse_events_parse(data, scanner);
1358
1359 parse_events__flush_buffer(buffer, scanner);
1360 parse_events__delete_buffer(buffer, scanner);
1361 parse_events_lex_destroy(scanner);
1362 return ret;
1363 }
1364
1365 /*
1366 * parse event config string, return a list of event terms.
1367 */
1368 int parse_events_terms(struct list_head *terms, const char *str)
1369 {
1370 struct parse_events_terms data = {
1371 .terms = NULL,
1372 };
1373 int ret;
1374
1375 ret = parse_events__scanner(str, &data, PE_START_TERMS);
1376 if (!ret) {
1377 list_splice(data.terms, terms);
1378 zfree(&data.terms);
1379 return 0;
1380 }
1381
1382 if (data.terms)
1383 parse_events__free_terms(data.terms);
1384 return ret;
1385 }
1386
1387 int parse_events(struct perf_evlist *evlist, const char *str,
1388 struct parse_events_error *err)
1389 {
1390 struct parse_events_evlist data = {
1391 .list = LIST_HEAD_INIT(data.list),
1392 .idx = evlist->nr_entries,
1393 .error = err,
1394 };
1395 int ret;
1396
1397 ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1398 perf_pmu__parse_cleanup();
1399 if (!ret) {
1400 struct perf_evsel *last;
1401
1402 if (list_empty(&data.list)) {
1403 WARN_ONCE(true, "WARNING: event parser found nothing");
1404 return -1;
1405 }
1406
1407 perf_evlist__splice_list_tail(evlist, &data.list);
1408 evlist->nr_groups += data.nr_groups;
1409 last = perf_evlist__last(evlist);
1410 last->cmdline_group_boundary = true;
1411
1412 return 0;
1413 }
1414
1415 /*
1416 * There are 2 users - builtin-record and builtin-test objects.
1417 * Both call perf_evlist__delete in case of error, so we dont
1418 * need to bother.
1419 */
1420 return ret;
1421 }
1422
1423 #define MAX_WIDTH 1000
1424 static int get_term_width(void)
1425 {
1426 struct winsize ws;
1427
1428 get_term_dimensions(&ws);
1429 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1430 }
1431
1432 static void parse_events_print_error(struct parse_events_error *err,
1433 const char *event)
1434 {
1435 const char *str = "invalid or unsupported event: ";
1436 char _buf[MAX_WIDTH];
1437 char *buf = (char *) event;
1438 int idx = 0;
1439
1440 if (err->str) {
1441 /* -2 for extra '' in the final fprintf */
1442 int width = get_term_width() - 2;
1443 int len_event = strlen(event);
1444 int len_str, max_len, cut = 0;
1445
1446 /*
1447 * Maximum error index indent, we will cut
1448 * the event string if it's bigger.
1449 */
1450 int max_err_idx = 13;
1451
1452 /*
1453 * Let's be specific with the message when
1454 * we have the precise error.
1455 */
1456 str = "event syntax error: ";
1457 len_str = strlen(str);
1458 max_len = width - len_str;
1459
1460 buf = _buf;
1461
1462 /* We're cutting from the beggining. */
1463 if (err->idx > max_err_idx)
1464 cut = err->idx - max_err_idx;
1465
1466 strncpy(buf, event + cut, max_len);
1467
1468 /* Mark cut parts with '..' on both sides. */
1469 if (cut)
1470 buf[0] = buf[1] = '.';
1471
1472 if ((len_event - cut) > max_len) {
1473 buf[max_len - 1] = buf[max_len - 2] = '.';
1474 buf[max_len] = 0;
1475 }
1476
1477 idx = len_str + err->idx - cut;
1478 }
1479
1480 fprintf(stderr, "%s'%s'\n", str, buf);
1481 if (idx) {
1482 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1483 if (err->help)
1484 fprintf(stderr, "\n%s\n", err->help);
1485 free(err->str);
1486 free(err->help);
1487 }
1488
1489 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1490 }
1491
1492 #undef MAX_WIDTH
1493
1494 int parse_events_option(const struct option *opt, const char *str,
1495 int unset __maybe_unused)
1496 {
1497 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1498 struct parse_events_error err = { .idx = 0, };
1499 int ret = parse_events(evlist, str, &err);
1500
1501 if (ret)
1502 parse_events_print_error(&err, str);
1503
1504 return ret;
1505 }
1506
1507 static int
1508 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1509 int (*func)(struct perf_evsel *evsel,
1510 const void *arg),
1511 const void *arg)
1512 {
1513 struct perf_evsel *last = NULL;
1514 int err;
1515
1516 /*
1517 * Don't return when list_empty, give func a chance to report
1518 * error when it found last == NULL.
1519 *
1520 * So no need to WARN here, let *func do this.
1521 */
1522 if (evlist->nr_entries > 0)
1523 last = perf_evlist__last(evlist);
1524
1525 do {
1526 err = (*func)(last, arg);
1527 if (err)
1528 return -1;
1529 if (!last)
1530 return 0;
1531
1532 if (last->node.prev == &evlist->entries)
1533 return 0;
1534 last = list_entry(last->node.prev, struct perf_evsel, node);
1535 } while (!last->cmdline_group_boundary);
1536
1537 return 0;
1538 }
1539
1540 static int set_filter(struct perf_evsel *evsel, const void *arg)
1541 {
1542 const char *str = arg;
1543
1544 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1545 fprintf(stderr,
1546 "--filter option should follow a -e tracepoint option\n");
1547 return -1;
1548 }
1549
1550 if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
1551 fprintf(stderr,
1552 "not enough memory to hold filter string\n");
1553 return -1;
1554 }
1555
1556 return 0;
1557 }
1558
1559 int parse_filter(const struct option *opt, const char *str,
1560 int unset __maybe_unused)
1561 {
1562 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1563
1564 return foreach_evsel_in_last_glob(evlist, set_filter,
1565 (const void *)str);
1566 }
1567
1568 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1569 const void *arg __maybe_unused)
1570 {
1571 char new_filter[64];
1572
1573 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1574 fprintf(stderr,
1575 "--exclude-perf option should follow a -e tracepoint option\n");
1576 return -1;
1577 }
1578
1579 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1580
1581 if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
1582 fprintf(stderr,
1583 "not enough memory to hold filter string\n");
1584 return -1;
1585 }
1586
1587 return 0;
1588 }
1589
1590 int exclude_perf(const struct option *opt,
1591 const char *arg __maybe_unused,
1592 int unset __maybe_unused)
1593 {
1594 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1595
1596 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1597 NULL);
1598 }
1599
1600 static const char * const event_type_descriptors[] = {
1601 "Hardware event",
1602 "Software event",
1603 "Tracepoint event",
1604 "Hardware cache event",
1605 "Raw hardware event descriptor",
1606 "Hardware breakpoint",
1607 };
1608
1609 static int cmp_string(const void *a, const void *b)
1610 {
1611 const char * const *as = a;
1612 const char * const *bs = b;
1613
1614 return strcmp(*as, *bs);
1615 }
1616
1617 /*
1618 * Print the events from <debugfs_mount_point>/tracing/events
1619 */
1620
1621 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1622 bool name_only)
1623 {
1624 DIR *sys_dir, *evt_dir;
1625 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1626 char evt_path[MAXPATHLEN];
1627 char dir_path[MAXPATHLEN];
1628 char **evt_list = NULL;
1629 unsigned int evt_i = 0, evt_num = 0;
1630 bool evt_num_known = false;
1631
1632 restart:
1633 sys_dir = opendir(tracing_events_path);
1634 if (!sys_dir)
1635 return;
1636
1637 if (evt_num_known) {
1638 evt_list = zalloc(sizeof(char *) * evt_num);
1639 if (!evt_list)
1640 goto out_close_sys_dir;
1641 }
1642
1643 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1644 if (subsys_glob != NULL &&
1645 !strglobmatch(sys_dirent.d_name, subsys_glob))
1646 continue;
1647
1648 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1649 sys_dirent.d_name);
1650 evt_dir = opendir(dir_path);
1651 if (!evt_dir)
1652 continue;
1653
1654 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1655 if (event_glob != NULL &&
1656 !strglobmatch(evt_dirent.d_name, event_glob))
1657 continue;
1658
1659 if (!evt_num_known) {
1660 evt_num++;
1661 continue;
1662 }
1663
1664 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1665 sys_dirent.d_name, evt_dirent.d_name);
1666
1667 evt_list[evt_i] = strdup(evt_path);
1668 if (evt_list[evt_i] == NULL)
1669 goto out_close_evt_dir;
1670 evt_i++;
1671 }
1672 closedir(evt_dir);
1673 }
1674 closedir(sys_dir);
1675
1676 if (!evt_num_known) {
1677 evt_num_known = true;
1678 goto restart;
1679 }
1680 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1681 evt_i = 0;
1682 while (evt_i < evt_num) {
1683 if (name_only) {
1684 printf("%s ", evt_list[evt_i++]);
1685 continue;
1686 }
1687 printf(" %-50s [%s]\n", evt_list[evt_i++],
1688 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1689 }
1690 if (evt_num && pager_in_use())
1691 printf("\n");
1692
1693 out_free:
1694 evt_num = evt_i;
1695 for (evt_i = 0; evt_i < evt_num; evt_i++)
1696 zfree(&evt_list[evt_i]);
1697 zfree(&evt_list);
1698 return;
1699
1700 out_close_evt_dir:
1701 closedir(evt_dir);
1702 out_close_sys_dir:
1703 closedir(sys_dir);
1704
1705 printf("FATAL: not enough memory to print %s\n",
1706 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1707 if (evt_list)
1708 goto out_free;
1709 }
1710
1711 /*
1712 * Check whether event is in <debugfs_mount_point>/tracing/events
1713 */
1714
1715 int is_valid_tracepoint(const char *event_string)
1716 {
1717 DIR *sys_dir, *evt_dir;
1718 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1719 char evt_path[MAXPATHLEN];
1720 char dir_path[MAXPATHLEN];
1721
1722 sys_dir = opendir(tracing_events_path);
1723 if (!sys_dir)
1724 return 0;
1725
1726 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1727
1728 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1729 sys_dirent.d_name);
1730 evt_dir = opendir(dir_path);
1731 if (!evt_dir)
1732 continue;
1733
1734 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1735 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1736 sys_dirent.d_name, evt_dirent.d_name);
1737 if (!strcmp(evt_path, event_string)) {
1738 closedir(evt_dir);
1739 closedir(sys_dir);
1740 return 1;
1741 }
1742 }
1743 closedir(evt_dir);
1744 }
1745 closedir(sys_dir);
1746 return 0;
1747 }
1748
1749 static bool is_event_supported(u8 type, unsigned config)
1750 {
1751 bool ret = true;
1752 int open_return;
1753 struct perf_evsel *evsel;
1754 struct perf_event_attr attr = {
1755 .type = type,
1756 .config = config,
1757 .disabled = 1,
1758 };
1759 struct {
1760 struct thread_map map;
1761 int threads[1];
1762 } tmap = {
1763 .map.nr = 1,
1764 .threads = { 0 },
1765 };
1766
1767 evsel = perf_evsel__new(&attr);
1768 if (evsel) {
1769 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1770 ret = open_return >= 0;
1771
1772 if (open_return == -EACCES) {
1773 /*
1774 * This happens if the paranoid value
1775 * /proc/sys/kernel/perf_event_paranoid is set to 2
1776 * Re-run with exclude_kernel set; we don't do that
1777 * by default as some ARM machines do not support it.
1778 *
1779 */
1780 evsel->attr.exclude_kernel = 1;
1781 ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1782 }
1783 perf_evsel__delete(evsel);
1784 }
1785
1786 return ret;
1787 }
1788
1789 int print_hwcache_events(const char *event_glob, bool name_only)
1790 {
1791 unsigned int type, op, i, evt_i = 0, evt_num = 0;
1792 char name[64];
1793 char **evt_list = NULL;
1794 bool evt_num_known = false;
1795
1796 restart:
1797 if (evt_num_known) {
1798 evt_list = zalloc(sizeof(char *) * evt_num);
1799 if (!evt_list)
1800 goto out_enomem;
1801 }
1802
1803 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1804 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1805 /* skip invalid cache type */
1806 if (!perf_evsel__is_cache_op_valid(type, op))
1807 continue;
1808
1809 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1810 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1811 name, sizeof(name));
1812 if (event_glob != NULL && !strglobmatch(name, event_glob))
1813 continue;
1814
1815 if (!is_event_supported(PERF_TYPE_HW_CACHE,
1816 type | (op << 8) | (i << 16)))
1817 continue;
1818
1819 if (!evt_num_known) {
1820 evt_num++;
1821 continue;
1822 }
1823
1824 evt_list[evt_i] = strdup(name);
1825 if (evt_list[evt_i] == NULL)
1826 goto out_enomem;
1827 evt_i++;
1828 }
1829 }
1830 }
1831
1832 if (!evt_num_known) {
1833 evt_num_known = true;
1834 goto restart;
1835 }
1836 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1837 evt_i = 0;
1838 while (evt_i < evt_num) {
1839 if (name_only) {
1840 printf("%s ", evt_list[evt_i++]);
1841 continue;
1842 }
1843 printf(" %-50s [%s]\n", evt_list[evt_i++],
1844 event_type_descriptors[PERF_TYPE_HW_CACHE]);
1845 }
1846 if (evt_num && pager_in_use())
1847 printf("\n");
1848
1849 out_free:
1850 evt_num = evt_i;
1851 for (evt_i = 0; evt_i < evt_num; evt_i++)
1852 zfree(&evt_list[evt_i]);
1853 zfree(&evt_list);
1854 return evt_num;
1855
1856 out_enomem:
1857 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
1858 if (evt_list)
1859 goto out_free;
1860 return evt_num;
1861 }
1862
1863 void print_symbol_events(const char *event_glob, unsigned type,
1864 struct event_symbol *syms, unsigned max,
1865 bool name_only)
1866 {
1867 unsigned int i, evt_i = 0, evt_num = 0;
1868 char name[MAX_NAME_LEN];
1869 char **evt_list = NULL;
1870 bool evt_num_known = false;
1871
1872 restart:
1873 if (evt_num_known) {
1874 evt_list = zalloc(sizeof(char *) * evt_num);
1875 if (!evt_list)
1876 goto out_enomem;
1877 syms -= max;
1878 }
1879
1880 for (i = 0; i < max; i++, syms++) {
1881
1882 if (event_glob != NULL &&
1883 !(strglobmatch(syms->symbol, event_glob) ||
1884 (syms->alias && strglobmatch(syms->alias, event_glob))))
1885 continue;
1886
1887 if (!is_event_supported(type, i))
1888 continue;
1889
1890 if (!evt_num_known) {
1891 evt_num++;
1892 continue;
1893 }
1894
1895 if (!name_only && strlen(syms->alias))
1896 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1897 else
1898 strncpy(name, syms->symbol, MAX_NAME_LEN);
1899
1900 evt_list[evt_i] = strdup(name);
1901 if (evt_list[evt_i] == NULL)
1902 goto out_enomem;
1903 evt_i++;
1904 }
1905
1906 if (!evt_num_known) {
1907 evt_num_known = true;
1908 goto restart;
1909 }
1910 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1911 evt_i = 0;
1912 while (evt_i < evt_num) {
1913 if (name_only) {
1914 printf("%s ", evt_list[evt_i++]);
1915 continue;
1916 }
1917 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
1918 }
1919 if (evt_num && pager_in_use())
1920 printf("\n");
1921
1922 out_free:
1923 evt_num = evt_i;
1924 for (evt_i = 0; evt_i < evt_num; evt_i++)
1925 zfree(&evt_list[evt_i]);
1926 zfree(&evt_list);
1927 return;
1928
1929 out_enomem:
1930 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
1931 if (evt_list)
1932 goto out_free;
1933 }
1934
1935 /*
1936 * Print the help text for the event symbols:
1937 */
1938 void print_events(const char *event_glob, bool name_only)
1939 {
1940 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1941 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1942
1943 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1944 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1945
1946 print_hwcache_events(event_glob, name_only);
1947
1948 print_pmu_events(event_glob, name_only);
1949
1950 if (event_glob != NULL)
1951 return;
1952
1953 if (!name_only) {
1954 printf(" %-50s [%s]\n",
1955 "rNNN",
1956 event_type_descriptors[PERF_TYPE_RAW]);
1957 printf(" %-50s [%s]\n",
1958 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1959 event_type_descriptors[PERF_TYPE_RAW]);
1960 if (pager_in_use())
1961 printf(" (see 'man perf-list' on how to encode it)\n\n");
1962
1963 printf(" %-50s [%s]\n",
1964 "mem:<addr>[/len][:access]",
1965 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1966 if (pager_in_use())
1967 printf("\n");
1968 }
1969
1970 print_tracepoint_events(NULL, NULL, name_only);
1971 }
1972
1973 int parse_events__is_hardcoded_term(struct parse_events_term *term)
1974 {
1975 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1976 }
1977
1978 static int new_term(struct parse_events_term **_term, int type_val,
1979 int type_term, char *config,
1980 char *str, u64 num, int err_term, int err_val)
1981 {
1982 struct parse_events_term *term;
1983
1984 term = zalloc(sizeof(*term));
1985 if (!term)
1986 return -ENOMEM;
1987
1988 INIT_LIST_HEAD(&term->list);
1989 term->type_val = type_val;
1990 term->type_term = type_term;
1991 term->config = config;
1992 term->err_term = err_term;
1993 term->err_val = err_val;
1994
1995 switch (type_val) {
1996 case PARSE_EVENTS__TERM_TYPE_NUM:
1997 term->val.num = num;
1998 break;
1999 case PARSE_EVENTS__TERM_TYPE_STR:
2000 term->val.str = str;
2001 break;
2002 default:
2003 free(term);
2004 return -EINVAL;
2005 }
2006
2007 *_term = term;
2008 return 0;
2009 }
2010
2011 int parse_events_term__num(struct parse_events_term **term,
2012 int type_term, char *config, u64 num,
2013 void *loc_term_, void *loc_val_)
2014 {
2015 YYLTYPE *loc_term = loc_term_;
2016 YYLTYPE *loc_val = loc_val_;
2017
2018 return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
2019 config, NULL, num,
2020 loc_term ? loc_term->first_column : 0,
2021 loc_val ? loc_val->first_column : 0);
2022 }
2023
2024 int parse_events_term__str(struct parse_events_term **term,
2025 int type_term, char *config, char *str,
2026 void *loc_term_, void *loc_val_)
2027 {
2028 YYLTYPE *loc_term = loc_term_;
2029 YYLTYPE *loc_val = loc_val_;
2030
2031 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
2032 config, str, 0,
2033 loc_term ? loc_term->first_column : 0,
2034 loc_val ? loc_val->first_column : 0);
2035 }
2036
2037 int parse_events_term__sym_hw(struct parse_events_term **term,
2038 char *config, unsigned idx)
2039 {
2040 struct event_symbol *sym;
2041
2042 BUG_ON(idx >= PERF_COUNT_HW_MAX);
2043 sym = &event_symbols_hw[idx];
2044
2045 if (config)
2046 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2047 PARSE_EVENTS__TERM_TYPE_USER, config,
2048 (char *) sym->symbol, 0, 0, 0);
2049 else
2050 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2051 PARSE_EVENTS__TERM_TYPE_USER,
2052 (char *) "event", (char *) sym->symbol,
2053 0, 0, 0);
2054 }
2055
2056 int parse_events_term__clone(struct parse_events_term **new,
2057 struct parse_events_term *term)
2058 {
2059 return new_term(new, term->type_val, term->type_term, term->config,
2060 term->val.str, term->val.num,
2061 term->err_term, term->err_val);
2062 }
2063
2064 void parse_events__free_terms(struct list_head *terms)
2065 {
2066 struct parse_events_term *term, *h;
2067
2068 list_for_each_entry_safe(term, h, terms, list)
2069 free(term);
2070 }
2071
2072 void parse_events_evlist_error(struct parse_events_evlist *data,
2073 int idx, const char *str)
2074 {
2075 struct parse_events_error *err = data->error;
2076
2077 if (!err)
2078 return;
2079 err->idx = idx;
2080 err->str = strdup(str);
2081 WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2082 }
2083
2084 /*
2085 * Return string contains valid config terms of an event.
2086 * @additional_terms: For terms such as PMU sysfs terms.
2087 */
2088 char *parse_events_formats_error_string(char *additional_terms)
2089 {
2090 char *str;
2091 static const char *static_terms = "config,config1,config2,name,"
2092 "period,freq,branch_type,time,"
2093 "call-graph,stack-size\n";
2094
2095 /* valid terms */
2096 if (additional_terms) {
2097 if (!asprintf(&str, "valid terms: %s,%s",
2098 additional_terms, static_terms))
2099 goto fail;
2100 } else {
2101 if (!asprintf(&str, "valid terms: %s", static_terms))
2102 goto fail;
2103 }
2104 return str;
2105
2106 fail:
2107 return NULL;
2108 }
Linux kernel - Deliverables
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