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1%define api.pure full
2%parse-param {void *_parse_state}
3%parse-param {void *scanner}
4%lex-param {void* scanner}
5%locations
6
7%{
8
9#ifndef NDEBUG
10#define YYDEBUG 1
11#endif
12
13#include <errno.h>
14#include <linux/compiler.h>
15#include <linux/types.h>
16#include "pmu.h"
17#include "pmus.h"
18#include "evsel.h"
19#include "parse-events.h"
20#include "parse-events-bison.h"
21
22int parse_events_lex(YYSTYPE * yylval_param, YYLTYPE * yylloc_param , void *yyscanner);
23void parse_events_error(YYLTYPE *loc, void *parse_state, void *scanner, char const *msg);
24
25#define PE_ABORT(val) \
26do { \
27 if (val == -ENOMEM) \
28 YYNOMEM; \
29 YYABORT; \
30} while (0)
31
32static struct list_head* alloc_list(void)
33{
34 struct list_head *list;
35
36 list = malloc(sizeof(*list));
37 if (!list)
38 return NULL;
39
40 INIT_LIST_HEAD(list);
41 return list;
42}
43
44static void free_list_evsel(struct list_head* list_evsel)
45{
46 struct evsel *evsel, *tmp;
47
48 list_for_each_entry_safe(evsel, tmp, list_evsel, core.node) {
49 list_del_init(&evsel->core.node);
50 evsel__delete(evsel);
51 }
52 free(list_evsel);
53}
54
55%}
56
57%token PE_START_EVENTS PE_START_TERMS
58%token PE_VALUE PE_VALUE_SYM_HW PE_VALUE_SYM_SW PE_TERM
59%token PE_VALUE_SYM_TOOL
60%token PE_EVENT_NAME
61%token PE_RAW PE_NAME
62%token PE_MODIFIER_EVENT PE_MODIFIER_BP PE_BP_COLON PE_BP_SLASH
63%token PE_LEGACY_CACHE
64%token PE_PREFIX_MEM
65%token PE_ERROR
66%token PE_DRV_CFG_TERM
67%token PE_TERM_HW
68%type <num> PE_VALUE
69%type <num> PE_VALUE_SYM_HW
70%type <num> PE_VALUE_SYM_SW
71%type <num> PE_VALUE_SYM_TOOL
72%type <term_type> PE_TERM
73%type <num> value_sym
74%type <str> PE_RAW
75%type <str> PE_NAME
76%type <str> PE_LEGACY_CACHE
77%type <str> PE_MODIFIER_EVENT
78%type <str> PE_MODIFIER_BP
79%type <str> PE_EVENT_NAME
80%type <str> PE_DRV_CFG_TERM
81%type <str> name_or_raw
82%destructor { free ($$); } <str>
83%type <term> event_term
84%destructor { parse_events_term__delete ($$); } <term>
85%type <list_terms> event_config
86%type <list_terms> opt_event_config
87%type <list_terms> opt_pmu_config
88%destructor { parse_events_terms__delete ($$); } <list_terms>
89%type <list_evsel> event_pmu
90%type <list_evsel> event_legacy_symbol
91%type <list_evsel> event_legacy_cache
92%type <list_evsel> event_legacy_mem
93%type <list_evsel> event_legacy_tracepoint
94%type <list_evsel> event_legacy_numeric
95%type <list_evsel> event_legacy_raw
96%type <list_evsel> event_def
97%type <list_evsel> event_mod
98%type <list_evsel> event_name
99%type <list_evsel> event
100%type <list_evsel> events
101%type <list_evsel> group_def
102%type <list_evsel> group
103%type <list_evsel> groups
104%destructor { free_list_evsel ($$); } <list_evsel>
105%type <tracepoint_name> tracepoint_name
106%destructor { free ($$.sys); free ($$.event); } <tracepoint_name>
107%type <hardware_term> PE_TERM_HW
108%destructor { free ($$.str); } <hardware_term>
109
110%union
111{
112 char *str;
113 u64 num;
114 enum parse_events__term_type term_type;
115 struct list_head *list_evsel;
116 struct parse_events_terms *list_terms;
117 struct parse_events_term *term;
118 struct tracepoint_name {
119 char *sys;
120 char *event;
121 } tracepoint_name;
122 struct hardware_term {
123 char *str;
124 u64 num;
125 } hardware_term;
126}
127%%
128
129start:
130PE_START_EVENTS start_events
131|
132PE_START_TERMS start_terms
133
134start_events: groups
135{
136 struct parse_events_state *parse_state = _parse_state;
137
138 /* frees $1 */
139 parse_events_update_lists($1, &parse_state->list);
140}
141
142groups:
143groups ',' group
144{
145 struct list_head *list = $1;
146 struct list_head *group = $3;
147
148 /* frees $3 */
149 parse_events_update_lists(group, list);
150 $$ = list;
151}
152|
153groups ',' event
154{
155 struct list_head *list = $1;
156 struct list_head *event = $3;
157
158 /* frees $3 */
159 parse_events_update_lists(event, list);
160 $$ = list;
161}
162|
163group
164|
165event
166
167group:
168group_def ':' PE_MODIFIER_EVENT
169{
170 struct list_head *list = $1;
171 int err;
172
173 err = parse_events__modifier_group(list, $3);
174 free($3);
175 if (err) {
176 struct parse_events_state *parse_state = _parse_state;
177 struct parse_events_error *error = parse_state->error;
178
179 parse_events_error__handle(error, @3.first_column,
180 strdup("Bad modifier"), NULL);
181 free_list_evsel(list);
182 YYABORT;
183 }
184 $$ = list;
185}
186|
187group_def
188
189group_def:
190PE_NAME '{' events '}'
191{
192 struct list_head *list = $3;
193
194 /* Takes ownership of $1. */
195 parse_events__set_leader($1, list);
196 $$ = list;
197}
198|
199'{' events '}'
200{
201 struct list_head *list = $2;
202
203 parse_events__set_leader(NULL, list);
204 $$ = list;
205}
206
207events:
208events ',' event
209{
210 struct list_head *event = $3;
211 struct list_head *list = $1;
212
213 /* frees $3 */
214 parse_events_update_lists(event, list);
215 $$ = list;
216}
217|
218event
219
220event: event_mod
221
222event_mod:
223event_name PE_MODIFIER_EVENT
224{
225 struct list_head *list = $1;
226 int err;
227
228 /*
229 * Apply modifier on all events added by single event definition
230 * (there could be more events added for multiple tracepoint
231 * definitions via '*?'.
232 */
233 err = parse_events__modifier_event(list, $2, false);
234 free($2);
235 if (err) {
236 struct parse_events_state *parse_state = _parse_state;
237 struct parse_events_error *error = parse_state->error;
238
239 parse_events_error__handle(error, @2.first_column,
240 strdup("Bad modifier"), NULL);
241 free_list_evsel(list);
242 YYABORT;
243 }
244 $$ = list;
245}
246|
247event_name
248
249event_name:
250PE_EVENT_NAME event_def
251{
252 int err;
253
254 err = parse_events_name($2, $1);
255 free($1);
256 if (err) {
257 free_list_evsel($2);
258 YYNOMEM;
259 }
260 $$ = $2;
261}
262|
263event_def
264
265event_def: event_pmu |
266 event_legacy_symbol |
267 event_legacy_cache sep_dc |
268 event_legacy_mem sep_dc |
269 event_legacy_tracepoint sep_dc |
270 event_legacy_numeric sep_dc |
271 event_legacy_raw sep_dc
272
273event_pmu:
274PE_NAME opt_pmu_config
275{
276 struct parse_events_state *parse_state = _parse_state;
277 /* List of created evsels. */
278 struct list_head *list = NULL;
279 char *pattern = NULL;
280
281#define CLEANUP \
282 do { \
283 parse_events_terms__delete($2); \
284 free(list); \
285 free($1); \
286 free(pattern); \
287 } while(0)
288
289 list = alloc_list();
290 if (!list) {
291 CLEANUP;
292 YYNOMEM;
293 }
294 /* Attempt to add to list assuming $1 is a PMU name. */
295 if (parse_events_add_pmu(parse_state, list, $1, $2, /*auto_merge_stats=*/false, &@1)) {
296 struct perf_pmu *pmu = NULL;
297 int ok = 0;
298
299 /* Failure to add, try wildcard expansion of $1 as a PMU name. */
300 if (asprintf(&pattern, "%s*", $1) < 0) {
301 CLEANUP;
302 YYNOMEM;
303 }
304
305 while ((pmu = perf_pmus__scan(pmu)) != NULL) {
306 const char *name = pmu->name;
307
308 if (parse_events__filter_pmu(parse_state, pmu))
309 continue;
310
311 if (!strncmp(name, "uncore_", 7) &&
312 strncmp($1, "uncore_", 7))
313 name += 7;
314 if (!perf_pmu__match(pattern, name, $1) ||
315 !perf_pmu__match(pattern, pmu->alias_name, $1)) {
316 bool auto_merge_stats = perf_pmu__auto_merge_stats(pmu);
317
318 if (!parse_events_add_pmu(parse_state, list, pmu->name, $2,
319 auto_merge_stats, &@1)) {
320 ok++;
321 parse_state->wild_card_pmus = true;
322 }
323 }
324 }
325
326 if (!ok) {
327 /* Failure to add, assume $1 is an event name. */
328 zfree(&list);
329 ok = !parse_events_multi_pmu_add(parse_state, $1, $2, &list, &@1);
330 }
331 if (!ok) {
332 struct parse_events_error *error = parse_state->error;
333 char *help;
334
335 if (asprintf(&help, "Unable to find PMU or event on a PMU of '%s'", $1) < 0)
336 help = NULL;
337 parse_events_error__handle(error, @1.first_column,
338 strdup("Bad event or PMU"),
339 help);
340 CLEANUP;
341 YYABORT;
342 }
343 }
344 $$ = list;
345 list = NULL;
346 CLEANUP;
347#undef CLEANUP
348}
349|
350PE_NAME sep_dc
351{
352 struct list_head *list;
353 int err;
354
355 err = parse_events_multi_pmu_add(_parse_state, $1, NULL, &list, &@1);
356 if (err < 0) {
357 struct parse_events_state *parse_state = _parse_state;
358 struct parse_events_error *error = parse_state->error;
359 char *help;
360
361 if (asprintf(&help, "Unable to find event on a PMU of '%s'", $1) < 0)
362 help = NULL;
363 parse_events_error__handle(error, @1.first_column, strdup("Bad event name"), help);
364 free($1);
365 PE_ABORT(err);
366 }
367 free($1);
368 $$ = list;
369}
370
371value_sym:
372PE_VALUE_SYM_HW
373|
374PE_VALUE_SYM_SW
375
376event_legacy_symbol:
377value_sym '/' event_config '/'
378{
379 struct list_head *list;
380 int type = $1 >> 16;
381 int config = $1 & 255;
382 int err;
383 bool wildcard = (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE);
384
385 list = alloc_list();
386 if (!list)
387 YYNOMEM;
388 err = parse_events_add_numeric(_parse_state, list, type, config, $3, wildcard);
389 parse_events_terms__delete($3);
390 if (err) {
391 free_list_evsel(list);
392 PE_ABORT(err);
393 }
394 $$ = list;
395}
396|
397value_sym sep_slash_slash_dc
398{
399 struct list_head *list;
400 int type = $1 >> 16;
401 int config = $1 & 255;
402 bool wildcard = (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE);
403 int err;
404
405 list = alloc_list();
406 if (!list)
407 YYNOMEM;
408 err = parse_events_add_numeric(_parse_state, list, type, config, /*head_config=*/NULL, wildcard);
409 if (err)
410 PE_ABORT(err);
411 $$ = list;
412}
413|
414PE_VALUE_SYM_TOOL sep_slash_slash_dc
415{
416 struct list_head *list;
417 int err;
418
419 list = alloc_list();
420 if (!list)
421 YYNOMEM;
422 err = parse_events_add_tool(_parse_state, list, $1);
423 if (err)
424 YYNOMEM;
425 $$ = list;
426}
427
428event_legacy_cache:
429PE_LEGACY_CACHE opt_event_config
430{
431 struct parse_events_state *parse_state = _parse_state;
432 struct list_head *list;
433 int err;
434
435 list = alloc_list();
436 if (!list)
437 YYNOMEM;
438
439 err = parse_events_add_cache(list, &parse_state->idx, $1, parse_state, $2);
440
441 parse_events_terms__delete($2);
442 free($1);
443 if (err) {
444 free_list_evsel(list);
445 PE_ABORT(err);
446 }
447 $$ = list;
448}
449
450event_legacy_mem:
451PE_PREFIX_MEM PE_VALUE PE_BP_SLASH PE_VALUE PE_BP_COLON PE_MODIFIER_BP opt_event_config
452{
453 struct list_head *list;
454 int err;
455
456 list = alloc_list();
457 if (!list)
458 YYNOMEM;
459
460 err = parse_events_add_breakpoint(_parse_state, list,
461 $2, $6, $4, $7);
462 parse_events_terms__delete($7);
463 free($6);
464 if (err) {
465 free(list);
466 PE_ABORT(err);
467 }
468 $$ = list;
469}
470|
471PE_PREFIX_MEM PE_VALUE PE_BP_SLASH PE_VALUE opt_event_config
472{
473 struct list_head *list;
474 int err;
475
476 list = alloc_list();
477 if (!list)
478 YYNOMEM;
479
480 err = parse_events_add_breakpoint(_parse_state, list,
481 $2, NULL, $4, $5);
482 parse_events_terms__delete($5);
483 if (err) {
484 free(list);
485 PE_ABORT(err);
486 }
487 $$ = list;
488}
489|
490PE_PREFIX_MEM PE_VALUE PE_BP_COLON PE_MODIFIER_BP opt_event_config
491{
492 struct list_head *list;
493 int err;
494
495 list = alloc_list();
496 if (!list)
497 YYNOMEM;
498
499 err = parse_events_add_breakpoint(_parse_state, list,
500 $2, $4, 0, $5);
501 parse_events_terms__delete($5);
502 free($4);
503 if (err) {
504 free(list);
505 PE_ABORT(err);
506 }
507 $$ = list;
508}
509|
510PE_PREFIX_MEM PE_VALUE opt_event_config
511{
512 struct list_head *list;
513 int err;
514
515 list = alloc_list();
516 if (!list)
517 YYNOMEM;
518 err = parse_events_add_breakpoint(_parse_state, list,
519 $2, NULL, 0, $3);
520 parse_events_terms__delete($3);
521 if (err) {
522 free(list);
523 PE_ABORT(err);
524 }
525 $$ = list;
526}
527
528event_legacy_tracepoint:
529tracepoint_name opt_event_config
530{
531 struct parse_events_state *parse_state = _parse_state;
532 struct parse_events_error *error = parse_state->error;
533 struct list_head *list;
534 int err;
535
536 list = alloc_list();
537 if (!list)
538 YYNOMEM;
539
540 err = parse_events_add_tracepoint(list, &parse_state->idx, $1.sys, $1.event,
541 error, $2, &@1);
542
543 parse_events_terms__delete($2);
544 free($1.sys);
545 free($1.event);
546 if (err) {
547 free(list);
548 PE_ABORT(err);
549 }
550 $$ = list;
551}
552
553tracepoint_name:
554PE_NAME ':' PE_NAME
555{
556 struct tracepoint_name tracepoint = {$1, $3};
557
558 $$ = tracepoint;
559}
560
561event_legacy_numeric:
562PE_VALUE ':' PE_VALUE opt_event_config
563{
564 struct list_head *list;
565 int err;
566
567 list = alloc_list();
568 if (!list)
569 YYNOMEM;
570 err = parse_events_add_numeric(_parse_state, list, (u32)$1, $3, $4,
571 /*wildcard=*/false);
572 parse_events_terms__delete($4);
573 if (err) {
574 free(list);
575 PE_ABORT(err);
576 }
577 $$ = list;
578}
579
580event_legacy_raw:
581PE_RAW opt_event_config
582{
583 struct list_head *list;
584 int err;
585 u64 num;
586
587 list = alloc_list();
588 if (!list)
589 YYNOMEM;
590 errno = 0;
591 num = strtoull($1 + 1, NULL, 16);
592 /* Given the lexer will only give [a-fA-F0-9]+ a failure here should be impossible. */
593 if (errno)
594 YYABORT;
595 free($1);
596 err = parse_events_add_numeric(_parse_state, list, PERF_TYPE_RAW, num, $2,
597 /*wildcard=*/false);
598 parse_events_terms__delete($2);
599 if (err) {
600 free(list);
601 PE_ABORT(err);
602 }
603 $$ = list;
604}
605
606opt_event_config:
607'/' event_config '/'
608{
609 $$ = $2;
610}
611|
612'/' '/'
613{
614 $$ = NULL;
615}
616|
617{
618 $$ = NULL;
619}
620
621opt_pmu_config:
622'/' event_config '/'
623{
624 $$ = $2;
625}
626|
627'/' '/'
628{
629 $$ = NULL;
630}
631
632start_terms: event_config
633{
634 struct parse_events_state *parse_state = _parse_state;
635 if (parse_state->terms) {
636 parse_events_terms__delete ($1);
637 YYABORT;
638 }
639 parse_state->terms = $1;
640}
641
642event_config:
643event_config ',' event_term
644{
645 struct parse_events_terms *head = $1;
646 struct parse_events_term *term = $3;
647
648 if (!head) {
649 parse_events_term__delete(term);
650 YYABORT;
651 }
652 list_add_tail(&term->list, &head->terms);
653 $$ = $1;
654}
655|
656event_term
657{
658 struct parse_events_terms *head = malloc(sizeof(*head));
659 struct parse_events_term *term = $1;
660
661 if (!head)
662 YYNOMEM;
663 parse_events_terms__init(head);
664 list_add_tail(&term->list, &head->terms);
665 $$ = head;
666}
667
668name_or_raw: PE_RAW | PE_NAME | PE_LEGACY_CACHE
669
670event_term:
671PE_RAW
672{
673 struct parse_events_term *term;
674 int err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_RAW,
675 strdup("raw"), $1, &@1, &@1);
676
677 if (err) {
678 free($1);
679 PE_ABORT(err);
680 }
681 $$ = term;
682}
683|
684name_or_raw '=' name_or_raw
685{
686 struct parse_events_term *term;
687 int err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_USER, $1, $3, &@1, &@3);
688
689 if (err) {
690 free($1);
691 free($3);
692 PE_ABORT(err);
693 }
694 $$ = term;
695}
696|
697name_or_raw '=' PE_VALUE
698{
699 struct parse_events_term *term;
700 int err = parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
701 $1, $3, /*novalue=*/false, &@1, &@3);
702
703 if (err) {
704 free($1);
705 PE_ABORT(err);
706 }
707 $$ = term;
708}
709|
710name_or_raw '=' PE_TERM_HW
711{
712 struct parse_events_term *term;
713 int err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_USER,
714 $1, $3.str, &@1, &@3);
715
716 if (err) {
717 free($1);
718 free($3.str);
719 PE_ABORT(err);
720 }
721 $$ = term;
722}
723|
724PE_LEGACY_CACHE
725{
726 struct parse_events_term *term;
727 int err = parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE,
728 $1, /*num=*/1, /*novalue=*/true, &@1, /*loc_val=*/NULL);
729
730 if (err) {
731 free($1);
732 PE_ABORT(err);
733 }
734 $$ = term;
735}
736|
737PE_NAME
738{
739 struct parse_events_term *term;
740 int err = parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
741 $1, /*num=*/1, /*novalue=*/true, &@1, /*loc_val=*/NULL);
742
743 if (err) {
744 free($1);
745 PE_ABORT(err);
746 }
747 $$ = term;
748}
749|
750PE_TERM_HW
751{
752 struct parse_events_term *term;
753 int err = parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_HARDWARE,
754 $1.str, $1.num & 255, /*novalue=*/false,
755 &@1, /*loc_val=*/NULL);
756
757 if (err) {
758 free($1.str);
759 PE_ABORT(err);
760 }
761 $$ = term;
762}
763|
764PE_TERM '=' name_or_raw
765{
766 struct parse_events_term *term;
767 int err = parse_events_term__str(&term, $1, /*config=*/NULL, $3, &@1, &@3);
768
769 if (err) {
770 free($3);
771 PE_ABORT(err);
772 }
773 $$ = term;
774}
775|
776PE_TERM '=' PE_TERM_HW
777{
778 struct parse_events_term *term;
779 int err = parse_events_term__str(&term, $1, /*config=*/NULL, $3.str, &@1, &@3);
780
781 if (err) {
782 free($3.str);
783 PE_ABORT(err);
784 }
785 $$ = term;
786}
787|
788PE_TERM '=' PE_TERM
789{
790 struct parse_events_term *term;
791 int err = parse_events_term__term(&term, $1, $3, &@1, &@3);
792
793 if (err)
794 PE_ABORT(err);
795
796 $$ = term;
797}
798|
799PE_TERM '=' PE_VALUE
800{
801 struct parse_events_term *term;
802 int err = parse_events_term__num(&term, $1,
803 /*config=*/NULL, $3, /*novalue=*/false,
804 &@1, &@3);
805
806 if (err)
807 PE_ABORT(err);
808
809 $$ = term;
810}
811|
812PE_TERM
813{
814 struct parse_events_term *term;
815 int err = parse_events_term__num(&term, $1,
816 /*config=*/NULL, /*num=*/1, /*novalue=*/true,
817 &@1, /*loc_val=*/NULL);
818
819 if (err)
820 PE_ABORT(err);
821
822 $$ = term;
823}
824|
825PE_DRV_CFG_TERM
826{
827 struct parse_events_term *term;
828 char *config = strdup($1);
829 int err;
830
831 if (!config)
832 YYNOMEM;
833 err = parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_DRV_CFG, config, $1, &@1, NULL);
834 if (err) {
835 free($1);
836 free(config);
837 PE_ABORT(err);
838 }
839 $$ = term;
840}
841
842sep_dc: ':' |
843
844sep_slash_slash_dc: '/' '/' | ':' |
845
846%%
847
848void parse_events_error(YYLTYPE *loc, void *parse_state,
849 void *scanner __maybe_unused,
850 char const *msg __maybe_unused)
851{
852 parse_events_evlist_error(parse_state, loc->last_column, "parser error");
853}