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[mirror_ubuntu-artful-kernel.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) || !obj) {
636 char errbuf[BUFSIZ];
637 int err;
638
639 err = obj ? PTR_ERR(obj) : -EINVAL;
640
641 if (err == -ENOTSUP)
642 snprintf(errbuf, sizeof(errbuf),
643 "BPF support is not compiled");
644 else
645 snprintf(errbuf, sizeof(errbuf),
646 "BPF object file '%s' is invalid",
647 bpf_file_name);
648
649 data->error->help = strdup("(add -v to see detail)");
650 data->error->str = strdup(errbuf);
651 return err;
652 }
653
654 return parse_events_load_bpf_obj(data, list, obj);
655 }
656
657 static int
658 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
659 {
660 int i;
661
662 for (i = 0; i < 3; i++) {
663 if (!type || !type[i])
664 break;
665
666 #define CHECK_SET_TYPE(bit) \
667 do { \
668 if (attr->bp_type & bit) \
669 return -EINVAL; \
670 else \
671 attr->bp_type |= bit; \
672 } while (0)
673
674 switch (type[i]) {
675 case 'r':
676 CHECK_SET_TYPE(HW_BREAKPOINT_R);
677 break;
678 case 'w':
679 CHECK_SET_TYPE(HW_BREAKPOINT_W);
680 break;
681 case 'x':
682 CHECK_SET_TYPE(HW_BREAKPOINT_X);
683 break;
684 default:
685 return -EINVAL;
686 }
687 }
688
689 #undef CHECK_SET_TYPE
690
691 if (!attr->bp_type) /* Default */
692 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
693
694 return 0;
695 }
696
697 int parse_events_add_breakpoint(struct list_head *list, int *idx,
698 void *ptr, char *type, u64 len)
699 {
700 struct perf_event_attr attr;
701
702 memset(&attr, 0, sizeof(attr));
703 attr.bp_addr = (unsigned long) ptr;
704
705 if (parse_breakpoint_type(type, &attr))
706 return -EINVAL;
707
708 /* Provide some defaults if len is not specified */
709 if (!len) {
710 if (attr.bp_type == HW_BREAKPOINT_X)
711 len = sizeof(long);
712 else
713 len = HW_BREAKPOINT_LEN_4;
714 }
715
716 attr.bp_len = len;
717
718 attr.type = PERF_TYPE_BREAKPOINT;
719 attr.sample_period = 1;
720
721 return add_event(list, idx, &attr, NULL, NULL);
722 }
723
724 static int check_type_val(struct parse_events_term *term,
725 struct parse_events_error *err,
726 int type)
727 {
728 if (type == term->type_val)
729 return 0;
730
731 if (err) {
732 err->idx = term->err_val;
733 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
734 err->str = strdup("expected numeric value");
735 else
736 err->str = strdup("expected string value");
737 }
738 return -EINVAL;
739 }
740
741 typedef int config_term_func_t(struct perf_event_attr *attr,
742 struct parse_events_term *term,
743 struct parse_events_error *err);
744
745 static int config_term_common(struct perf_event_attr *attr,
746 struct parse_events_term *term,
747 struct parse_events_error *err)
748 {
749 #define CHECK_TYPE_VAL(type) \
750 do { \
751 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
752 return -EINVAL; \
753 } while (0)
754
755 switch (term->type_term) {
756 case PARSE_EVENTS__TERM_TYPE_CONFIG:
757 CHECK_TYPE_VAL(NUM);
758 attr->config = term->val.num;
759 break;
760 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
761 CHECK_TYPE_VAL(NUM);
762 attr->config1 = term->val.num;
763 break;
764 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
765 CHECK_TYPE_VAL(NUM);
766 attr->config2 = term->val.num;
767 break;
768 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
769 CHECK_TYPE_VAL(NUM);
770 break;
771 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
772 CHECK_TYPE_VAL(NUM);
773 break;
774 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
775 /*
776 * TODO uncomment when the field is available
777 * attr->branch_sample_type = term->val.num;
778 */
779 break;
780 case PARSE_EVENTS__TERM_TYPE_TIME:
781 CHECK_TYPE_VAL(NUM);
782 if (term->val.num > 1) {
783 err->str = strdup("expected 0 or 1");
784 err->idx = term->err_val;
785 return -EINVAL;
786 }
787 break;
788 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
789 CHECK_TYPE_VAL(STR);
790 break;
791 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
792 CHECK_TYPE_VAL(NUM);
793 break;
794 case PARSE_EVENTS__TERM_TYPE_INHERIT:
795 CHECK_TYPE_VAL(NUM);
796 break;
797 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
798 CHECK_TYPE_VAL(NUM);
799 break;
800 case PARSE_EVENTS__TERM_TYPE_NAME:
801 CHECK_TYPE_VAL(STR);
802 break;
803 default:
804 err->str = strdup("unknown term");
805 err->idx = term->err_term;
806 err->help = parse_events_formats_error_string(NULL);
807 return -EINVAL;
808 }
809
810 return 0;
811 #undef CHECK_TYPE_VAL
812 }
813
814 static int config_term_pmu(struct perf_event_attr *attr,
815 struct parse_events_term *term,
816 struct parse_events_error *err)
817 {
818 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER)
819 /*
820 * Always succeed for sysfs terms, as we dont know
821 * at this point what type they need to have.
822 */
823 return 0;
824 else
825 return config_term_common(attr, term, err);
826 }
827
828 static int config_term_tracepoint(struct perf_event_attr *attr,
829 struct parse_events_term *term,
830 struct parse_events_error *err)
831 {
832 switch (term->type_term) {
833 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
834 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
835 case PARSE_EVENTS__TERM_TYPE_INHERIT:
836 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
837 return config_term_common(attr, term, err);
838 default:
839 if (err) {
840 err->idx = term->err_term;
841 err->str = strdup("unknown term");
842 err->help = strdup("valid terms: call-graph,stack-size\n");
843 }
844 return -EINVAL;
845 }
846
847 return 0;
848 }
849
850 static int config_attr(struct perf_event_attr *attr,
851 struct list_head *head,
852 struct parse_events_error *err,
853 config_term_func_t config_term)
854 {
855 struct parse_events_term *term;
856
857 list_for_each_entry(term, head, list)
858 if (config_term(attr, term, err))
859 return -EINVAL;
860
861 return 0;
862 }
863
864 static int get_config_terms(struct list_head *head_config,
865 struct list_head *head_terms __maybe_unused)
866 {
867 #define ADD_CONFIG_TERM(__type, __name, __val) \
868 do { \
869 struct perf_evsel_config_term *__t; \
870 \
871 __t = zalloc(sizeof(*__t)); \
872 if (!__t) \
873 return -ENOMEM; \
874 \
875 INIT_LIST_HEAD(&__t->list); \
876 __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
877 __t->val.__name = __val; \
878 list_add_tail(&__t->list, head_terms); \
879 } while (0)
880
881 struct parse_events_term *term;
882
883 list_for_each_entry(term, head_config, list) {
884 switch (term->type_term) {
885 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
886 ADD_CONFIG_TERM(PERIOD, period, term->val.num);
887 break;
888 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
889 ADD_CONFIG_TERM(FREQ, freq, term->val.num);
890 break;
891 case PARSE_EVENTS__TERM_TYPE_TIME:
892 ADD_CONFIG_TERM(TIME, time, term->val.num);
893 break;
894 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
895 ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
896 break;
897 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
898 ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
899 break;
900 case PARSE_EVENTS__TERM_TYPE_INHERIT:
901 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
902 break;
903 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
904 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
905 break;
906 default:
907 break;
908 }
909 }
910 #undef ADD_EVSEL_CONFIG
911 return 0;
912 }
913
914 int parse_events_add_tracepoint(struct list_head *list, int *idx,
915 char *sys, char *event,
916 struct parse_events_error *err,
917 struct list_head *head_config)
918 {
919 if (head_config) {
920 struct perf_event_attr attr;
921
922 if (config_attr(&attr, head_config, err,
923 config_term_tracepoint))
924 return -EINVAL;
925 }
926
927 if (strpbrk(sys, "*?"))
928 return add_tracepoint_multi_sys(list, idx, sys, event,
929 err, head_config);
930 else
931 return add_tracepoint_event(list, idx, sys, event,
932 err, head_config);
933 }
934
935 int parse_events_add_numeric(struct parse_events_evlist *data,
936 struct list_head *list,
937 u32 type, u64 config,
938 struct list_head *head_config)
939 {
940 struct perf_event_attr attr;
941 LIST_HEAD(config_terms);
942
943 memset(&attr, 0, sizeof(attr));
944 attr.type = type;
945 attr.config = config;
946
947 if (head_config) {
948 if (config_attr(&attr, head_config, data->error,
949 config_term_common))
950 return -EINVAL;
951
952 if (get_config_terms(head_config, &config_terms))
953 return -ENOMEM;
954 }
955
956 return add_event(list, &data->idx, &attr, NULL, &config_terms);
957 }
958
959 static int parse_events__is_name_term(struct parse_events_term *term)
960 {
961 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
962 }
963
964 static char *pmu_event_name(struct list_head *head_terms)
965 {
966 struct parse_events_term *term;
967
968 list_for_each_entry(term, head_terms, list)
969 if (parse_events__is_name_term(term))
970 return term->val.str;
971
972 return NULL;
973 }
974
975 int parse_events_add_pmu(struct parse_events_evlist *data,
976 struct list_head *list, char *name,
977 struct list_head *head_config)
978 {
979 struct perf_event_attr attr;
980 struct perf_pmu_info info;
981 struct perf_pmu *pmu;
982 struct perf_evsel *evsel;
983 LIST_HEAD(config_terms);
984
985 pmu = perf_pmu__find(name);
986 if (!pmu)
987 return -EINVAL;
988
989 if (pmu->default_config) {
990 memcpy(&attr, pmu->default_config,
991 sizeof(struct perf_event_attr));
992 } else {
993 memset(&attr, 0, sizeof(attr));
994 }
995
996 if (!head_config) {
997 attr.type = pmu->type;
998 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
999 return evsel ? 0 : -ENOMEM;
1000 }
1001
1002 if (perf_pmu__check_alias(pmu, head_config, &info))
1003 return -EINVAL;
1004
1005 /*
1006 * Configure hardcoded terms first, no need to check
1007 * return value when called with fail == 0 ;)
1008 */
1009 if (config_attr(&attr, head_config, data->error, config_term_pmu))
1010 return -EINVAL;
1011
1012 if (get_config_terms(head_config, &config_terms))
1013 return -ENOMEM;
1014
1015 if (perf_pmu__config(pmu, &attr, head_config, data->error))
1016 return -EINVAL;
1017
1018 evsel = __add_event(list, &data->idx, &attr,
1019 pmu_event_name(head_config), pmu->cpus,
1020 &config_terms);
1021 if (evsel) {
1022 evsel->unit = info.unit;
1023 evsel->scale = info.scale;
1024 evsel->per_pkg = info.per_pkg;
1025 evsel->snapshot = info.snapshot;
1026 }
1027
1028 return evsel ? 0 : -ENOMEM;
1029 }
1030
1031 int parse_events__modifier_group(struct list_head *list,
1032 char *event_mod)
1033 {
1034 return parse_events__modifier_event(list, event_mod, true);
1035 }
1036
1037 void parse_events__set_leader(char *name, struct list_head *list)
1038 {
1039 struct perf_evsel *leader;
1040
1041 if (list_empty(list)) {
1042 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1043 return;
1044 }
1045
1046 __perf_evlist__set_leader(list);
1047 leader = list_entry(list->next, struct perf_evsel, node);
1048 leader->group_name = name ? strdup(name) : NULL;
1049 }
1050
1051 /* list_event is assumed to point to malloc'ed memory */
1052 void parse_events_update_lists(struct list_head *list_event,
1053 struct list_head *list_all)
1054 {
1055 /*
1056 * Called for single event definition. Update the
1057 * 'all event' list, and reinit the 'single event'
1058 * list, for next event definition.
1059 */
1060 list_splice_tail(list_event, list_all);
1061 free(list_event);
1062 }
1063
1064 struct event_modifier {
1065 int eu;
1066 int ek;
1067 int eh;
1068 int eH;
1069 int eG;
1070 int eI;
1071 int precise;
1072 int precise_max;
1073 int exclude_GH;
1074 int sample_read;
1075 int pinned;
1076 };
1077
1078 static int get_event_modifier(struct event_modifier *mod, char *str,
1079 struct perf_evsel *evsel)
1080 {
1081 int eu = evsel ? evsel->attr.exclude_user : 0;
1082 int ek = evsel ? evsel->attr.exclude_kernel : 0;
1083 int eh = evsel ? evsel->attr.exclude_hv : 0;
1084 int eH = evsel ? evsel->attr.exclude_host : 0;
1085 int eG = evsel ? evsel->attr.exclude_guest : 0;
1086 int eI = evsel ? evsel->attr.exclude_idle : 0;
1087 int precise = evsel ? evsel->attr.precise_ip : 0;
1088 int precise_max = 0;
1089 int sample_read = 0;
1090 int pinned = evsel ? evsel->attr.pinned : 0;
1091
1092 int exclude = eu | ek | eh;
1093 int exclude_GH = evsel ? evsel->exclude_GH : 0;
1094
1095 memset(mod, 0, sizeof(*mod));
1096
1097 while (*str) {
1098 if (*str == 'u') {
1099 if (!exclude)
1100 exclude = eu = ek = eh = 1;
1101 eu = 0;
1102 } else if (*str == 'k') {
1103 if (!exclude)
1104 exclude = eu = ek = eh = 1;
1105 ek = 0;
1106 } else if (*str == 'h') {
1107 if (!exclude)
1108 exclude = eu = ek = eh = 1;
1109 eh = 0;
1110 } else if (*str == 'G') {
1111 if (!exclude_GH)
1112 exclude_GH = eG = eH = 1;
1113 eG = 0;
1114 } else if (*str == 'H') {
1115 if (!exclude_GH)
1116 exclude_GH = eG = eH = 1;
1117 eH = 0;
1118 } else if (*str == 'I') {
1119 eI = 1;
1120 } else if (*str == 'p') {
1121 precise++;
1122 /* use of precise requires exclude_guest */
1123 if (!exclude_GH)
1124 eG = 1;
1125 } else if (*str == 'P') {
1126 precise_max = 1;
1127 } else if (*str == 'S') {
1128 sample_read = 1;
1129 } else if (*str == 'D') {
1130 pinned = 1;
1131 } else
1132 break;
1133
1134 ++str;
1135 }
1136
1137 /*
1138 * precise ip:
1139 *
1140 * 0 - SAMPLE_IP can have arbitrary skid
1141 * 1 - SAMPLE_IP must have constant skid
1142 * 2 - SAMPLE_IP requested to have 0 skid
1143 * 3 - SAMPLE_IP must have 0 skid
1144 *
1145 * See also PERF_RECORD_MISC_EXACT_IP
1146 */
1147 if (precise > 3)
1148 return -EINVAL;
1149
1150 mod->eu = eu;
1151 mod->ek = ek;
1152 mod->eh = eh;
1153 mod->eH = eH;
1154 mod->eG = eG;
1155 mod->eI = eI;
1156 mod->precise = precise;
1157 mod->precise_max = precise_max;
1158 mod->exclude_GH = exclude_GH;
1159 mod->sample_read = sample_read;
1160 mod->pinned = pinned;
1161
1162 return 0;
1163 }
1164
1165 /*
1166 * Basic modifier sanity check to validate it contains only one
1167 * instance of any modifier (apart from 'p') present.
1168 */
1169 static int check_modifier(char *str)
1170 {
1171 char *p = str;
1172
1173 /* The sizeof includes 0 byte as well. */
1174 if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1175 return -1;
1176
1177 while (*p) {
1178 if (*p != 'p' && strchr(p + 1, *p))
1179 return -1;
1180 p++;
1181 }
1182
1183 return 0;
1184 }
1185
1186 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1187 {
1188 struct perf_evsel *evsel;
1189 struct event_modifier mod;
1190
1191 if (str == NULL)
1192 return 0;
1193
1194 if (check_modifier(str))
1195 return -EINVAL;
1196
1197 if (!add && get_event_modifier(&mod, str, NULL))
1198 return -EINVAL;
1199
1200 __evlist__for_each(list, evsel) {
1201 if (add && get_event_modifier(&mod, str, evsel))
1202 return -EINVAL;
1203
1204 evsel->attr.exclude_user = mod.eu;
1205 evsel->attr.exclude_kernel = mod.ek;
1206 evsel->attr.exclude_hv = mod.eh;
1207 evsel->attr.precise_ip = mod.precise;
1208 evsel->attr.exclude_host = mod.eH;
1209 evsel->attr.exclude_guest = mod.eG;
1210 evsel->attr.exclude_idle = mod.eI;
1211 evsel->exclude_GH = mod.exclude_GH;
1212 evsel->sample_read = mod.sample_read;
1213 evsel->precise_max = mod.precise_max;
1214
1215 if (perf_evsel__is_group_leader(evsel))
1216 evsel->attr.pinned = mod.pinned;
1217 }
1218
1219 return 0;
1220 }
1221
1222 int parse_events_name(struct list_head *list, char *name)
1223 {
1224 struct perf_evsel *evsel;
1225
1226 __evlist__for_each(list, evsel) {
1227 if (!evsel->name)
1228 evsel->name = strdup(name);
1229 }
1230
1231 return 0;
1232 }
1233
1234 static int
1235 comp_pmu(const void *p1, const void *p2)
1236 {
1237 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1238 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1239
1240 return strcmp(pmu1->symbol, pmu2->symbol);
1241 }
1242
1243 static void perf_pmu__parse_cleanup(void)
1244 {
1245 if (perf_pmu_events_list_num > 0) {
1246 struct perf_pmu_event_symbol *p;
1247 int i;
1248
1249 for (i = 0; i < perf_pmu_events_list_num; i++) {
1250 p = perf_pmu_events_list + i;
1251 free(p->symbol);
1252 }
1253 free(perf_pmu_events_list);
1254 perf_pmu_events_list = NULL;
1255 perf_pmu_events_list_num = 0;
1256 }
1257 }
1258
1259 #define SET_SYMBOL(str, stype) \
1260 do { \
1261 p->symbol = str; \
1262 if (!p->symbol) \
1263 goto err; \
1264 p->type = stype; \
1265 } while (0)
1266
1267 /*
1268 * Read the pmu events list from sysfs
1269 * Save it into perf_pmu_events_list
1270 */
1271 static void perf_pmu__parse_init(void)
1272 {
1273
1274 struct perf_pmu *pmu = NULL;
1275 struct perf_pmu_alias *alias;
1276 int len = 0;
1277
1278 pmu = perf_pmu__find("cpu");
1279 if ((pmu == NULL) || list_empty(&pmu->aliases)) {
1280 perf_pmu_events_list_num = -1;
1281 return;
1282 }
1283 list_for_each_entry(alias, &pmu->aliases, list) {
1284 if (strchr(alias->name, '-'))
1285 len++;
1286 len++;
1287 }
1288 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1289 if (!perf_pmu_events_list)
1290 return;
1291 perf_pmu_events_list_num = len;
1292
1293 len = 0;
1294 list_for_each_entry(alias, &pmu->aliases, list) {
1295 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1296 char *tmp = strchr(alias->name, '-');
1297
1298 if (tmp != NULL) {
1299 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1300 PMU_EVENT_SYMBOL_PREFIX);
1301 p++;
1302 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1303 len += 2;
1304 } else {
1305 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1306 len++;
1307 }
1308 }
1309 qsort(perf_pmu_events_list, len,
1310 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1311
1312 return;
1313 err:
1314 perf_pmu__parse_cleanup();
1315 }
1316
1317 enum perf_pmu_event_symbol_type
1318 perf_pmu__parse_check(const char *name)
1319 {
1320 struct perf_pmu_event_symbol p, *r;
1321
1322 /* scan kernel pmu events from sysfs if needed */
1323 if (perf_pmu_events_list_num == 0)
1324 perf_pmu__parse_init();
1325 /*
1326 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1327 * cpu-cycles has been handled by hardcode.
1328 * So it must be cpu// events, not kernel pmu event.
1329 */
1330 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1331 return PMU_EVENT_SYMBOL_ERR;
1332
1333 p.symbol = strdup(name);
1334 r = bsearch(&p, perf_pmu_events_list,
1335 (size_t) perf_pmu_events_list_num,
1336 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1337 free(p.symbol);
1338 return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1339 }
1340
1341 static int parse_events__scanner(const char *str, void *data, int start_token)
1342 {
1343 YY_BUFFER_STATE buffer;
1344 void *scanner;
1345 int ret;
1346
1347 ret = parse_events_lex_init_extra(start_token, &scanner);
1348 if (ret)
1349 return ret;
1350
1351 buffer = parse_events__scan_string(str, scanner);
1352
1353 #ifdef PARSER_DEBUG
1354 parse_events_debug = 1;
1355 #endif
1356 ret = parse_events_parse(data, scanner);
1357
1358 parse_events__flush_buffer(buffer, scanner);
1359 parse_events__delete_buffer(buffer, scanner);
1360 parse_events_lex_destroy(scanner);
1361 return ret;
1362 }
1363
1364 /*
1365 * parse event config string, return a list of event terms.
1366 */
1367 int parse_events_terms(struct list_head *terms, const char *str)
1368 {
1369 struct parse_events_terms data = {
1370 .terms = NULL,
1371 };
1372 int ret;
1373
1374 ret = parse_events__scanner(str, &data, PE_START_TERMS);
1375 if (!ret) {
1376 list_splice(data.terms, terms);
1377 zfree(&data.terms);
1378 return 0;
1379 }
1380
1381 if (data.terms)
1382 parse_events__free_terms(data.terms);
1383 return ret;
1384 }
1385
1386 int parse_events(struct perf_evlist *evlist, const char *str,
1387 struct parse_events_error *err)
1388 {
1389 struct parse_events_evlist data = {
1390 .list = LIST_HEAD_INIT(data.list),
1391 .idx = evlist->nr_entries,
1392 .error = err,
1393 };
1394 int ret;
1395
1396 ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1397 perf_pmu__parse_cleanup();
1398 if (!ret) {
1399 struct perf_evsel *last;
1400
1401 if (list_empty(&data.list)) {
1402 WARN_ONCE(true, "WARNING: event parser found nothing");
1403 return -1;
1404 }
1405
1406 perf_evlist__splice_list_tail(evlist, &data.list);
1407 evlist->nr_groups += data.nr_groups;
1408 last = perf_evlist__last(evlist);
1409 last->cmdline_group_boundary = true;
1410
1411 return 0;
1412 }
1413
1414 /*
1415 * There are 2 users - builtin-record and builtin-test objects.
1416 * Both call perf_evlist__delete in case of error, so we dont
1417 * need to bother.
1418 */
1419 return ret;
1420 }
1421
1422 #define MAX_WIDTH 1000
1423 static int get_term_width(void)
1424 {
1425 struct winsize ws;
1426
1427 get_term_dimensions(&ws);
1428 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1429 }
1430
1431 static void parse_events_print_error(struct parse_events_error *err,
1432 const char *event)
1433 {
1434 const char *str = "invalid or unsupported event: ";
1435 char _buf[MAX_WIDTH];
1436 char *buf = (char *) event;
1437 int idx = 0;
1438
1439 if (err->str) {
1440 /* -2 for extra '' in the final fprintf */
1441 int width = get_term_width() - 2;
1442 int len_event = strlen(event);
1443 int len_str, max_len, cut = 0;
1444
1445 /*
1446 * Maximum error index indent, we will cut
1447 * the event string if it's bigger.
1448 */
1449 int max_err_idx = 13;
1450
1451 /*
1452 * Let's be specific with the message when
1453 * we have the precise error.
1454 */
1455 str = "event syntax error: ";
1456 len_str = strlen(str);
1457 max_len = width - len_str;
1458
1459 buf = _buf;
1460
1461 /* We're cutting from the beggining. */
1462 if (err->idx > max_err_idx)
1463 cut = err->idx - max_err_idx;
1464
1465 strncpy(buf, event + cut, max_len);
1466
1467 /* Mark cut parts with '..' on both sides. */
1468 if (cut)
1469 buf[0] = buf[1] = '.';
1470
1471 if ((len_event - cut) > max_len) {
1472 buf[max_len - 1] = buf[max_len - 2] = '.';
1473 buf[max_len] = 0;
1474 }
1475
1476 idx = len_str + err->idx - cut;
1477 }
1478
1479 fprintf(stderr, "%s'%s'\n", str, buf);
1480 if (idx) {
1481 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1482 if (err->help)
1483 fprintf(stderr, "\n%s\n", err->help);
1484 free(err->str);
1485 free(err->help);
1486 }
1487
1488 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1489 }
1490
1491 #undef MAX_WIDTH
1492
1493 int parse_events_option(const struct option *opt, const char *str,
1494 int unset __maybe_unused)
1495 {
1496 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1497 struct parse_events_error err = { .idx = 0, };
1498 int ret = parse_events(evlist, str, &err);
1499
1500 if (ret)
1501 parse_events_print_error(&err, str);
1502
1503 return ret;
1504 }
1505
1506 static int
1507 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1508 int (*func)(struct perf_evsel *evsel,
1509 const void *arg),
1510 const void *arg)
1511 {
1512 struct perf_evsel *last = NULL;
1513 int err;
1514
1515 /*
1516 * Don't return when list_empty, give func a chance to report
1517 * error when it found last == NULL.
1518 *
1519 * So no need to WARN here, let *func do this.
1520 */
1521 if (evlist->nr_entries > 0)
1522 last = perf_evlist__last(evlist);
1523
1524 do {
1525 err = (*func)(last, arg);
1526 if (err)
1527 return -1;
1528 if (!last)
1529 return 0;
1530
1531 if (last->node.prev == &evlist->entries)
1532 return 0;
1533 last = list_entry(last->node.prev, struct perf_evsel, node);
1534 } while (!last->cmdline_group_boundary);
1535
1536 return 0;
1537 }
1538
1539 static int set_filter(struct perf_evsel *evsel, const void *arg)
1540 {
1541 const char *str = arg;
1542
1543 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1544 fprintf(stderr,
1545 "--filter option should follow a -e tracepoint option\n");
1546 return -1;
1547 }
1548
1549 if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
1550 fprintf(stderr,
1551 "not enough memory to hold filter string\n");
1552 return -1;
1553 }
1554
1555 return 0;
1556 }
1557
1558 int parse_filter(const struct option *opt, const char *str,
1559 int unset __maybe_unused)
1560 {
1561 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1562
1563 return foreach_evsel_in_last_glob(evlist, set_filter,
1564 (const void *)str);
1565 }
1566
1567 static int add_exclude_perf_filter(struct perf_evsel *evsel,
1568 const void *arg __maybe_unused)
1569 {
1570 char new_filter[64];
1571
1572 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1573 fprintf(stderr,
1574 "--exclude-perf option should follow a -e tracepoint option\n");
1575 return -1;
1576 }
1577
1578 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1579
1580 if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
1581 fprintf(stderr,
1582 "not enough memory to hold filter string\n");
1583 return -1;
1584 }
1585
1586 return 0;
1587 }
1588
1589 int exclude_perf(const struct option *opt,
1590 const char *arg __maybe_unused,
1591 int unset __maybe_unused)
1592 {
1593 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1594
1595 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1596 NULL);
1597 }
1598
1599 static const char * const event_type_descriptors[] = {
1600 "Hardware event",
1601 "Software event",
1602 "Tracepoint event",
1603 "Hardware cache event",
1604 "Raw hardware event descriptor",
1605 "Hardware breakpoint",
1606 };
1607
1608 static int cmp_string(const void *a, const void *b)
1609 {
1610 const char * const *as = a;
1611 const char * const *bs = b;
1612
1613 return strcmp(*as, *bs);
1614 }
1615
1616 /*
1617 * Print the events from <debugfs_mount_point>/tracing/events
1618 */
1619
1620 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1621 bool name_only)
1622 {
1623 DIR *sys_dir, *evt_dir;
1624 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1625 char evt_path[MAXPATHLEN];
1626 char dir_path[MAXPATHLEN];
1627 char **evt_list = NULL;
1628 unsigned int evt_i = 0, evt_num = 0;
1629 bool evt_num_known = false;
1630
1631 restart:
1632 sys_dir = opendir(tracing_events_path);
1633 if (!sys_dir)
1634 return;
1635
1636 if (evt_num_known) {
1637 evt_list = zalloc(sizeof(char *) * evt_num);
1638 if (!evt_list)
1639 goto out_close_sys_dir;
1640 }
1641
1642 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1643 if (subsys_glob != NULL &&
1644 !strglobmatch(sys_dirent.d_name, subsys_glob))
1645 continue;
1646
1647 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1648 sys_dirent.d_name);
1649 evt_dir = opendir(dir_path);
1650 if (!evt_dir)
1651 continue;
1652
1653 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1654 if (event_glob != NULL &&
1655 !strglobmatch(evt_dirent.d_name, event_glob))
1656 continue;
1657
1658 if (!evt_num_known) {
1659 evt_num++;
1660 continue;
1661 }
1662
1663 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1664 sys_dirent.d_name, evt_dirent.d_name);
1665
1666 evt_list[evt_i] = strdup(evt_path);
1667 if (evt_list[evt_i] == NULL)
1668 goto out_close_evt_dir;
1669 evt_i++;
1670 }
1671 closedir(evt_dir);
1672 }
1673 closedir(sys_dir);
1674
1675 if (!evt_num_known) {
1676 evt_num_known = true;
1677 goto restart;
1678 }
1679 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1680 evt_i = 0;
1681 while (evt_i < evt_num) {
1682 if (name_only) {
1683 printf("%s ", evt_list[evt_i++]);
1684 continue;
1685 }
1686 printf(" %-50s [%s]\n", evt_list[evt_i++],
1687 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1688 }
1689 if (evt_num && pager_in_use())
1690 printf("\n");
1691
1692 out_free:
1693 evt_num = evt_i;
1694 for (evt_i = 0; evt_i < evt_num; evt_i++)
1695 zfree(&evt_list[evt_i]);
1696 zfree(&evt_list);
1697 return;
1698
1699 out_close_evt_dir:
1700 closedir(evt_dir);
1701 out_close_sys_dir:
1702 closedir(sys_dir);
1703
1704 printf("FATAL: not enough memory to print %s\n",
1705 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1706 if (evt_list)
1707 goto out_free;
1708 }
1709
1710 /*
1711 * Check whether event is in <debugfs_mount_point>/tracing/events
1712 */
1713
1714 int is_valid_tracepoint(const char *event_string)
1715 {
1716 DIR *sys_dir, *evt_dir;
1717 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
1718 char evt_path[MAXPATHLEN];
1719 char dir_path[MAXPATHLEN];
1720
1721 sys_dir = opendir(tracing_events_path);
1722 if (!sys_dir)
1723 return 0;
1724
1725 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
1726
1727 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1728 sys_dirent.d_name);
1729 evt_dir = opendir(dir_path);
1730 if (!evt_dir)
1731 continue;
1732
1733 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
1734 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1735 sys_dirent.d_name, evt_dirent.d_name);
1736 if (!strcmp(evt_path, event_string)) {
1737 closedir(evt_dir);
1738 closedir(sys_dir);
1739 return 1;
1740 }
1741 }
1742 closedir(evt_dir);
1743 }
1744 closedir(sys_dir);
1745 return 0;
1746 }
1747
1748 static bool is_event_supported(u8 type, unsigned config)
1749 {
1750 bool ret = true;
1751 int open_return;
1752 struct perf_evsel *evsel;
1753 struct perf_event_attr attr = {
1754 .type = type,
1755 .config = config,
1756 .disabled = 1,
1757 };
1758 struct {
1759 struct thread_map map;
1760 int threads[1];
1761 } tmap = {
1762 .map.nr = 1,
1763 .threads = { 0 },
1764 };
1765
1766 evsel = perf_evsel__new(&attr);
1767 if (evsel) {
1768 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1769 ret = open_return >= 0;
1770
1771 if (open_return == -EACCES) {
1772 /*
1773 * This happens if the paranoid value
1774 * /proc/sys/kernel/perf_event_paranoid is set to 2
1775 * Re-run with exclude_kernel set; we don't do that
1776 * by default as some ARM machines do not support it.
1777 *
1778 */
1779 evsel->attr.exclude_kernel = 1;
1780 ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1781 }
1782 perf_evsel__delete(evsel);
1783 }
1784
1785 return ret;
1786 }
1787
1788 int print_hwcache_events(const char *event_glob, bool name_only)
1789 {
1790 unsigned int type, op, i, evt_i = 0, evt_num = 0;
1791 char name[64];
1792 char **evt_list = NULL;
1793 bool evt_num_known = false;
1794
1795 restart:
1796 if (evt_num_known) {
1797 evt_list = zalloc(sizeof(char *) * evt_num);
1798 if (!evt_list)
1799 goto out_enomem;
1800 }
1801
1802 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1803 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1804 /* skip invalid cache type */
1805 if (!perf_evsel__is_cache_op_valid(type, op))
1806 continue;
1807
1808 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1809 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
1810 name, sizeof(name));
1811 if (event_glob != NULL && !strglobmatch(name, event_glob))
1812 continue;
1813
1814 if (!is_event_supported(PERF_TYPE_HW_CACHE,
1815 type | (op << 8) | (i << 16)))
1816 continue;
1817
1818 if (!evt_num_known) {
1819 evt_num++;
1820 continue;
1821 }
1822
1823 evt_list[evt_i] = strdup(name);
1824 if (evt_list[evt_i] == NULL)
1825 goto out_enomem;
1826 evt_i++;
1827 }
1828 }
1829 }
1830
1831 if (!evt_num_known) {
1832 evt_num_known = true;
1833 goto restart;
1834 }
1835 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1836 evt_i = 0;
1837 while (evt_i < evt_num) {
1838 if (name_only) {
1839 printf("%s ", evt_list[evt_i++]);
1840 continue;
1841 }
1842 printf(" %-50s [%s]\n", evt_list[evt_i++],
1843 event_type_descriptors[PERF_TYPE_HW_CACHE]);
1844 }
1845 if (evt_num && pager_in_use())
1846 printf("\n");
1847
1848 out_free:
1849 evt_num = evt_i;
1850 for (evt_i = 0; evt_i < evt_num; evt_i++)
1851 zfree(&evt_list[evt_i]);
1852 zfree(&evt_list);
1853 return evt_num;
1854
1855 out_enomem:
1856 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
1857 if (evt_list)
1858 goto out_free;
1859 return evt_num;
1860 }
1861
1862 void print_symbol_events(const char *event_glob, unsigned type,
1863 struct event_symbol *syms, unsigned max,
1864 bool name_only)
1865 {
1866 unsigned int i, evt_i = 0, evt_num = 0;
1867 char name[MAX_NAME_LEN];
1868 char **evt_list = NULL;
1869 bool evt_num_known = false;
1870
1871 restart:
1872 if (evt_num_known) {
1873 evt_list = zalloc(sizeof(char *) * evt_num);
1874 if (!evt_list)
1875 goto out_enomem;
1876 syms -= max;
1877 }
1878
1879 for (i = 0; i < max; i++, syms++) {
1880
1881 if (event_glob != NULL &&
1882 !(strglobmatch(syms->symbol, event_glob) ||
1883 (syms->alias && strglobmatch(syms->alias, event_glob))))
1884 continue;
1885
1886 if (!is_event_supported(type, i))
1887 continue;
1888
1889 if (!evt_num_known) {
1890 evt_num++;
1891 continue;
1892 }
1893
1894 if (!name_only && strlen(syms->alias))
1895 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1896 else
1897 strncpy(name, syms->symbol, MAX_NAME_LEN);
1898
1899 evt_list[evt_i] = strdup(name);
1900 if (evt_list[evt_i] == NULL)
1901 goto out_enomem;
1902 evt_i++;
1903 }
1904
1905 if (!evt_num_known) {
1906 evt_num_known = true;
1907 goto restart;
1908 }
1909 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1910 evt_i = 0;
1911 while (evt_i < evt_num) {
1912 if (name_only) {
1913 printf("%s ", evt_list[evt_i++]);
1914 continue;
1915 }
1916 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
1917 }
1918 if (evt_num && pager_in_use())
1919 printf("\n");
1920
1921 out_free:
1922 evt_num = evt_i;
1923 for (evt_i = 0; evt_i < evt_num; evt_i++)
1924 zfree(&evt_list[evt_i]);
1925 zfree(&evt_list);
1926 return;
1927
1928 out_enomem:
1929 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
1930 if (evt_list)
1931 goto out_free;
1932 }
1933
1934 /*
1935 * Print the help text for the event symbols:
1936 */
1937 void print_events(const char *event_glob, bool name_only)
1938 {
1939 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
1940 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
1941
1942 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
1943 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
1944
1945 print_hwcache_events(event_glob, name_only);
1946
1947 print_pmu_events(event_glob, name_only);
1948
1949 if (event_glob != NULL)
1950 return;
1951
1952 if (!name_only) {
1953 printf(" %-50s [%s]\n",
1954 "rNNN",
1955 event_type_descriptors[PERF_TYPE_RAW]);
1956 printf(" %-50s [%s]\n",
1957 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
1958 event_type_descriptors[PERF_TYPE_RAW]);
1959 if (pager_in_use())
1960 printf(" (see 'man perf-list' on how to encode it)\n\n");
1961
1962 printf(" %-50s [%s]\n",
1963 "mem:<addr>[/len][:access]",
1964 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1965 if (pager_in_use())
1966 printf("\n");
1967 }
1968
1969 print_tracepoint_events(NULL, NULL, name_only);
1970 }
1971
1972 int parse_events__is_hardcoded_term(struct parse_events_term *term)
1973 {
1974 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
1975 }
1976
1977 static int new_term(struct parse_events_term **_term, int type_val,
1978 int type_term, char *config,
1979 char *str, u64 num, int err_term, int err_val)
1980 {
1981 struct parse_events_term *term;
1982
1983 term = zalloc(sizeof(*term));
1984 if (!term)
1985 return -ENOMEM;
1986
1987 INIT_LIST_HEAD(&term->list);
1988 term->type_val = type_val;
1989 term->type_term = type_term;
1990 term->config = config;
1991 term->err_term = err_term;
1992 term->err_val = err_val;
1993
1994 switch (type_val) {
1995 case PARSE_EVENTS__TERM_TYPE_NUM:
1996 term->val.num = num;
1997 break;
1998 case PARSE_EVENTS__TERM_TYPE_STR:
1999 term->val.str = str;
2000 break;
2001 default:
2002 free(term);
2003 return -EINVAL;
2004 }
2005
2006 *_term = term;
2007 return 0;
2008 }
2009
2010 int parse_events_term__num(struct parse_events_term **term,
2011 int type_term, char *config, u64 num,
2012 void *loc_term_, void *loc_val_)
2013 {
2014 YYLTYPE *loc_term = loc_term_;
2015 YYLTYPE *loc_val = loc_val_;
2016
2017 return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
2018 config, NULL, num,
2019 loc_term ? loc_term->first_column : 0,
2020 loc_val ? loc_val->first_column : 0);
2021 }
2022
2023 int parse_events_term__str(struct parse_events_term **term,
2024 int type_term, char *config, char *str,
2025 void *loc_term_, void *loc_val_)
2026 {
2027 YYLTYPE *loc_term = loc_term_;
2028 YYLTYPE *loc_val = loc_val_;
2029
2030 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
2031 config, str, 0,
2032 loc_term ? loc_term->first_column : 0,
2033 loc_val ? loc_val->first_column : 0);
2034 }
2035
2036 int parse_events_term__sym_hw(struct parse_events_term **term,
2037 char *config, unsigned idx)
2038 {
2039 struct event_symbol *sym;
2040
2041 BUG_ON(idx >= PERF_COUNT_HW_MAX);
2042 sym = &event_symbols_hw[idx];
2043
2044 if (config)
2045 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2046 PARSE_EVENTS__TERM_TYPE_USER, config,
2047 (char *) sym->symbol, 0, 0, 0);
2048 else
2049 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2050 PARSE_EVENTS__TERM_TYPE_USER,
2051 (char *) "event", (char *) sym->symbol,
2052 0, 0, 0);
2053 }
2054
2055 int parse_events_term__clone(struct parse_events_term **new,
2056 struct parse_events_term *term)
2057 {
2058 return new_term(new, term->type_val, term->type_term, term->config,
2059 term->val.str, term->val.num,
2060 term->err_term, term->err_val);
2061 }
2062
2063 void parse_events__free_terms(struct list_head *terms)
2064 {
2065 struct parse_events_term *term, *h;
2066
2067 list_for_each_entry_safe(term, h, terms, list)
2068 free(term);
2069 }
2070
2071 void parse_events_evlist_error(struct parse_events_evlist *data,
2072 int idx, const char *str)
2073 {
2074 struct parse_events_error *err = data->error;
2075
2076 if (!err)
2077 return;
2078 err->idx = idx;
2079 err->str = strdup(str);
2080 WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2081 }
2082
2083 /*
2084 * Return string contains valid config terms of an event.
2085 * @additional_terms: For terms such as PMU sysfs terms.
2086 */
2087 char *parse_events_formats_error_string(char *additional_terms)
2088 {
2089 char *str;
2090 static const char *static_terms = "config,config1,config2,name,"
2091 "period,freq,branch_type,time,"
2092 "call-graph,stack-size\n";
2093
2094 /* valid terms */
2095 if (additional_terms) {
2096 if (!asprintf(&str, "valid terms: %s,%s",
2097 additional_terms, static_terms))
2098 goto fail;
2099 } else {
2100 if (!asprintf(&str, "valid terms: %s", static_terms))
2101 goto fail;
2102 }
2103 return str;
2104
2105 fail:
2106 return NULL;
2107 }
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