tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1%pure-parser
2%parse-param {void *_data}
3%parse-param {void *scanner}
4%lex-param {void* scanner}
5%locations
6
7%{
8
9#define YYDEBUG 1
10
11#include <linux/compiler.h>
12#include <linux/list.h>
13#include <linux/types.h>
14#include "util.h"
15#include "parse-events.h"
16#include "parse-events-bison.h"
17
18#define ABORT_ON(val) \
19do { \
20 if (val) \
21 YYABORT; \
22} while (0)
23
24#define ALLOC_LIST(list) \
25do { \
26 list = malloc(sizeof(*list)); \
27 ABORT_ON(!list); \
28 INIT_LIST_HEAD(list); \
29} while (0)
30
31static void inc_group_count(struct list_head *list,
32 struct parse_events_evlist *data)
33{
34 /* Count groups only have more than 1 members */
35 if (!list_is_last(list->next, list))
36 data->nr_groups++;
37}
38
39%}
40
41%token PE_START_EVENTS PE_START_TERMS
42%token PE_VALUE PE_VALUE_SYM_HW PE_VALUE_SYM_SW PE_RAW PE_TERM
43%token PE_EVENT_NAME
44%token PE_NAME
45%token PE_BPF_OBJECT PE_BPF_SOURCE
46%token PE_MODIFIER_EVENT PE_MODIFIER_BP
47%token PE_NAME_CACHE_TYPE PE_NAME_CACHE_OP_RESULT
48%token PE_PREFIX_MEM PE_PREFIX_RAW PE_PREFIX_GROUP
49%token PE_ERROR
50%token PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT
51%token PE_ARRAY_ALL PE_ARRAY_RANGE
52%token PE_DRV_CFG_TERM
53%type <num> PE_VALUE
54%type <num> PE_VALUE_SYM_HW
55%type <num> PE_VALUE_SYM_SW
56%type <num> PE_RAW
57%type <num> PE_TERM
58%type <str> PE_NAME
59%type <str> PE_BPF_OBJECT
60%type <str> PE_BPF_SOURCE
61%type <str> PE_NAME_CACHE_TYPE
62%type <str> PE_NAME_CACHE_OP_RESULT
63%type <str> PE_MODIFIER_EVENT
64%type <str> PE_MODIFIER_BP
65%type <str> PE_EVENT_NAME
66%type <str> PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT
67%type <str> PE_DRV_CFG_TERM
68%type <num> value_sym
69%type <head> event_config
70%type <head> opt_event_config
71%type <term> event_term
72%type <head> event_pmu
73%type <head> event_legacy_symbol
74%type <head> event_legacy_cache
75%type <head> event_legacy_mem
76%type <head> event_legacy_tracepoint
77%type <tracepoint_name> tracepoint_name
78%type <head> event_legacy_numeric
79%type <head> event_legacy_raw
80%type <head> event_bpf_file
81%type <head> event_def
82%type <head> event_mod
83%type <head> event_name
84%type <head> event
85%type <head> events
86%type <head> group_def
87%type <head> group
88%type <head> groups
89%type <array> array
90%type <array> array_term
91%type <array> array_terms
92
93%union
94{
95 char *str;
96 u64 num;
97 struct list_head *head;
98 struct parse_events_term *term;
99 struct tracepoint_name {
100 char *sys;
101 char *event;
102 } tracepoint_name;
103 struct parse_events_array array;
104}
105%%
106
107start:
108PE_START_EVENTS start_events
109|
110PE_START_TERMS start_terms
111
112start_events: groups
113{
114 struct parse_events_evlist *data = _data;
115
116 parse_events_update_lists($1, &data->list);
117}
118
119groups:
120groups ',' group
121{
122 struct list_head *list = $1;
123 struct list_head *group = $3;
124
125 parse_events_update_lists(group, list);
126 $$ = list;
127}
128|
129groups ',' event
130{
131 struct list_head *list = $1;
132 struct list_head *event = $3;
133
134 parse_events_update_lists(event, list);
135 $$ = list;
136}
137|
138group
139|
140event
141
142group:
143group_def ':' PE_MODIFIER_EVENT
144{
145 struct list_head *list = $1;
146
147 ABORT_ON(parse_events__modifier_group(list, $3));
148 $$ = list;
149}
150|
151group_def
152
153group_def:
154PE_NAME '{' events '}'
155{
156 struct list_head *list = $3;
157
158 inc_group_count(list, _data);
159 parse_events__set_leader($1, list);
160 $$ = list;
161}
162|
163'{' events '}'
164{
165 struct list_head *list = $2;
166
167 inc_group_count(list, _data);
168 parse_events__set_leader(NULL, list);
169 $$ = list;
170}
171
172events:
173events ',' event
174{
175 struct list_head *event = $3;
176 struct list_head *list = $1;
177
178 parse_events_update_lists(event, list);
179 $$ = list;
180}
181|
182event
183
184event: event_mod
185
186event_mod:
187event_name PE_MODIFIER_EVENT
188{
189 struct list_head *list = $1;
190
191 /*
192 * Apply modifier on all events added by single event definition
193 * (there could be more events added for multiple tracepoint
194 * definitions via '*?'.
195 */
196 ABORT_ON(parse_events__modifier_event(list, $2, false));
197 $$ = list;
198}
199|
200event_name
201
202event_name:
203PE_EVENT_NAME event_def
204{
205 ABORT_ON(parse_events_name($2, $1));
206 free($1);
207 $$ = $2;
208}
209|
210event_def
211
212event_def: event_pmu |
213 event_legacy_symbol |
214 event_legacy_cache sep_dc |
215 event_legacy_mem |
216 event_legacy_tracepoint sep_dc |
217 event_legacy_numeric sep_dc |
218 event_legacy_raw sep_dc |
219 event_bpf_file
220
221event_pmu:
222PE_NAME opt_event_config
223{
224 struct parse_events_evlist *data = _data;
225 struct list_head *list;
226
227 ALLOC_LIST(list);
228 ABORT_ON(parse_events_add_pmu(data, list, $1, $2));
229 parse_events_terms__delete($2);
230 $$ = list;
231}
232|
233PE_KERNEL_PMU_EVENT sep_dc
234{
235 struct parse_events_evlist *data = _data;
236 struct list_head *head;
237 struct parse_events_term *term;
238 struct list_head *list;
239
240 ALLOC_LIST(head);
241 ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
242 $1, 1, &@1, NULL));
243 list_add_tail(&term->list, head);
244
245 ALLOC_LIST(list);
246 ABORT_ON(parse_events_add_pmu(data, list, "cpu", head));
247 parse_events_terms__delete(head);
248 $$ = list;
249}
250|
251PE_PMU_EVENT_PRE '-' PE_PMU_EVENT_SUF sep_dc
252{
253 struct parse_events_evlist *data = _data;
254 struct list_head *head;
255 struct parse_events_term *term;
256 struct list_head *list;
257 char pmu_name[128];
258 snprintf(&pmu_name, 128, "%s-%s", $1, $3);
259
260 ALLOC_LIST(head);
261 ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
262 &pmu_name, 1, &@1, NULL));
263 list_add_tail(&term->list, head);
264
265 ALLOC_LIST(list);
266 ABORT_ON(parse_events_add_pmu(data, list, "cpu", head));
267 parse_events_terms__delete(head);
268 $$ = list;
269}
270
271value_sym:
272PE_VALUE_SYM_HW
273|
274PE_VALUE_SYM_SW
275
276event_legacy_symbol:
277value_sym '/' event_config '/'
278{
279 struct parse_events_evlist *data = _data;
280 struct list_head *list;
281 int type = $1 >> 16;
282 int config = $1 & 255;
283
284 ALLOC_LIST(list);
285 ABORT_ON(parse_events_add_numeric(data, list, type, config, $3));
286 parse_events_terms__delete($3);
287 $$ = list;
288}
289|
290value_sym sep_slash_dc
291{
292 struct parse_events_evlist *data = _data;
293 struct list_head *list;
294 int type = $1 >> 16;
295 int config = $1 & 255;
296
297 ALLOC_LIST(list);
298 ABORT_ON(parse_events_add_numeric(data, list, type, config, NULL));
299 $$ = list;
300}
301
302event_legacy_cache:
303PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT '-' PE_NAME_CACHE_OP_RESULT opt_event_config
304{
305 struct parse_events_evlist *data = _data;
306 struct parse_events_error *error = data->error;
307 struct list_head *list;
308
309 ALLOC_LIST(list);
310 ABORT_ON(parse_events_add_cache(list, &data->idx, $1, $3, $5, error, $6));
311 parse_events_terms__delete($6);
312 $$ = list;
313}
314|
315PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT opt_event_config
316{
317 struct parse_events_evlist *data = _data;
318 struct parse_events_error *error = data->error;
319 struct list_head *list;
320
321 ALLOC_LIST(list);
322 ABORT_ON(parse_events_add_cache(list, &data->idx, $1, $3, NULL, error, $4));
323 parse_events_terms__delete($4);
324 $$ = list;
325}
326|
327PE_NAME_CACHE_TYPE opt_event_config
328{
329 struct parse_events_evlist *data = _data;
330 struct parse_events_error *error = data->error;
331 struct list_head *list;
332
333 ALLOC_LIST(list);
334 ABORT_ON(parse_events_add_cache(list, &data->idx, $1, NULL, NULL, error, $2));
335 parse_events_terms__delete($2);
336 $$ = list;
337}
338
339event_legacy_mem:
340PE_PREFIX_MEM PE_VALUE '/' PE_VALUE ':' PE_MODIFIER_BP sep_dc
341{
342 struct parse_events_evlist *data = _data;
343 struct list_head *list;
344
345 ALLOC_LIST(list);
346 ABORT_ON(parse_events_add_breakpoint(list, &data->idx,
347 (void *) $2, $6, $4));
348 $$ = list;
349}
350|
351PE_PREFIX_MEM PE_VALUE '/' PE_VALUE sep_dc
352{
353 struct parse_events_evlist *data = _data;
354 struct list_head *list;
355
356 ALLOC_LIST(list);
357 ABORT_ON(parse_events_add_breakpoint(list, &data->idx,
358 (void *) $2, NULL, $4));
359 $$ = list;
360}
361|
362PE_PREFIX_MEM PE_VALUE ':' PE_MODIFIER_BP sep_dc
363{
364 struct parse_events_evlist *data = _data;
365 struct list_head *list;
366
367 ALLOC_LIST(list);
368 ABORT_ON(parse_events_add_breakpoint(list, &data->idx,
369 (void *) $2, $4, 0));
370 $$ = list;
371}
372|
373PE_PREFIX_MEM PE_VALUE sep_dc
374{
375 struct parse_events_evlist *data = _data;
376 struct list_head *list;
377
378 ALLOC_LIST(list);
379 ABORT_ON(parse_events_add_breakpoint(list, &data->idx,
380 (void *) $2, NULL, 0));
381 $$ = list;
382}
383
384event_legacy_tracepoint:
385tracepoint_name opt_event_config
386{
387 struct parse_events_evlist *data = _data;
388 struct parse_events_error *error = data->error;
389 struct list_head *list;
390
391 ALLOC_LIST(list);
392 if (error)
393 error->idx = @1.first_column;
394
395 if (parse_events_add_tracepoint(list, &data->idx, $1.sys, $1.event,
396 error, $2))
397 return -1;
398
399 $$ = list;
400}
401
402tracepoint_name:
403PE_NAME '-' PE_NAME ':' PE_NAME
404{
405 char sys_name[128];
406 struct tracepoint_name tracepoint;
407
408 snprintf(&sys_name, 128, "%s-%s", $1, $3);
409 tracepoint.sys = &sys_name;
410 tracepoint.event = $5;
411
412 $$ = tracepoint;
413}
414|
415PE_NAME ':' PE_NAME
416{
417 struct tracepoint_name tracepoint = {$1, $3};
418
419 $$ = tracepoint;
420}
421
422event_legacy_numeric:
423PE_VALUE ':' PE_VALUE opt_event_config
424{
425 struct parse_events_evlist *data = _data;
426 struct list_head *list;
427
428 ALLOC_LIST(list);
429 ABORT_ON(parse_events_add_numeric(data, list, (u32)$1, $3, $4));
430 parse_events_terms__delete($4);
431 $$ = list;
432}
433
434event_legacy_raw:
435PE_RAW opt_event_config
436{
437 struct parse_events_evlist *data = _data;
438 struct list_head *list;
439
440 ALLOC_LIST(list);
441 ABORT_ON(parse_events_add_numeric(data, list, PERF_TYPE_RAW, $1, $2));
442 parse_events_terms__delete($2);
443 $$ = list;
444}
445
446event_bpf_file:
447PE_BPF_OBJECT opt_event_config
448{
449 struct parse_events_evlist *data = _data;
450 struct parse_events_error *error = data->error;
451 struct list_head *list;
452
453 ALLOC_LIST(list);
454 ABORT_ON(parse_events_load_bpf(data, list, $1, false, $2));
455 parse_events_terms__delete($2);
456 $$ = list;
457}
458|
459PE_BPF_SOURCE opt_event_config
460{
461 struct parse_events_evlist *data = _data;
462 struct list_head *list;
463
464 ALLOC_LIST(list);
465 ABORT_ON(parse_events_load_bpf(data, list, $1, true, $2));
466 parse_events_terms__delete($2);
467 $$ = list;
468}
469
470opt_event_config:
471'/' event_config '/'
472{
473 $$ = $2;
474}
475|
476'/' '/'
477{
478 $$ = NULL;
479}
480|
481{
482 $$ = NULL;
483}
484
485start_terms: event_config
486{
487 struct parse_events_terms *data = _data;
488 data->terms = $1;
489}
490
491event_config:
492event_config ',' event_term
493{
494 struct list_head *head = $1;
495 struct parse_events_term *term = $3;
496
497 ABORT_ON(!head);
498 list_add_tail(&term->list, head);
499 $$ = $1;
500}
501|
502event_term
503{
504 struct list_head *head = malloc(sizeof(*head));
505 struct parse_events_term *term = $1;
506
507 ABORT_ON(!head);
508 INIT_LIST_HEAD(head);
509 list_add_tail(&term->list, head);
510 $$ = head;
511}
512
513event_term:
514PE_NAME '=' PE_NAME
515{
516 struct parse_events_term *term;
517
518 ABORT_ON(parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_USER,
519 $1, $3, &@1, &@3));
520 $$ = term;
521}
522|
523PE_NAME '=' PE_VALUE
524{
525 struct parse_events_term *term;
526
527 ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
528 $1, $3, &@1, &@3));
529 $$ = term;
530}
531|
532PE_NAME '=' PE_VALUE_SYM_HW
533{
534 struct parse_events_term *term;
535 int config = $3 & 255;
536
537 ABORT_ON(parse_events_term__sym_hw(&term, $1, config));
538 $$ = term;
539}
540|
541PE_NAME
542{
543 struct parse_events_term *term;
544
545 ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
546 $1, 1, &@1, NULL));
547 $$ = term;
548}
549|
550PE_VALUE_SYM_HW
551{
552 struct parse_events_term *term;
553 int config = $1 & 255;
554
555 ABORT_ON(parse_events_term__sym_hw(&term, NULL, config));
556 $$ = term;
557}
558|
559PE_TERM '=' PE_NAME
560{
561 struct parse_events_term *term;
562
563 ABORT_ON(parse_events_term__str(&term, (int)$1, NULL, $3, &@1, &@3));
564 $$ = term;
565}
566|
567PE_TERM '=' PE_VALUE
568{
569 struct parse_events_term *term;
570
571 ABORT_ON(parse_events_term__num(&term, (int)$1, NULL, $3, &@1, &@3));
572 $$ = term;
573}
574|
575PE_TERM
576{
577 struct parse_events_term *term;
578
579 ABORT_ON(parse_events_term__num(&term, (int)$1, NULL, 1, &@1, NULL));
580 $$ = term;
581}
582|
583PE_NAME array '=' PE_NAME
584{
585 struct parse_events_term *term;
586 int i;
587
588 ABORT_ON(parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_USER,
589 $1, $4, &@1, &@4));
590
591 term->array = $2;
592 $$ = term;
593}
594|
595PE_NAME array '=' PE_VALUE
596{
597 struct parse_events_term *term;
598
599 ABORT_ON(parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
600 $1, $4, &@1, &@4));
601 term->array = $2;
602 $$ = term;
603}
604|
605PE_DRV_CFG_TERM
606{
607 struct parse_events_term *term;
608
609 ABORT_ON(parse_events_term__str(&term, PARSE_EVENTS__TERM_TYPE_DRV_CFG,
610 $1, $1, &@1, NULL));
611 $$ = term;
612}
613
614array:
615'[' array_terms ']'
616{
617 $$ = $2;
618}
619|
620PE_ARRAY_ALL
621{
622 $$.nr_ranges = 0;
623 $$.ranges = NULL;
624}
625
626array_terms:
627array_terms ',' array_term
628{
629 struct parse_events_array new_array;
630
631 new_array.nr_ranges = $1.nr_ranges + $3.nr_ranges;
632 new_array.ranges = malloc(sizeof(new_array.ranges[0]) *
633 new_array.nr_ranges);
634 ABORT_ON(!new_array.ranges);
635 memcpy(&new_array.ranges[0], $1.ranges,
636 $1.nr_ranges * sizeof(new_array.ranges[0]));
637 memcpy(&new_array.ranges[$1.nr_ranges], $3.ranges,
638 $3.nr_ranges * sizeof(new_array.ranges[0]));
639 free($1.ranges);
640 free($3.ranges);
641 $$ = new_array;
642}
643|
644array_term
645
646array_term:
647PE_VALUE
648{
649 struct parse_events_array array;
650
651 array.nr_ranges = 1;
652 array.ranges = malloc(sizeof(array.ranges[0]));
653 ABORT_ON(!array.ranges);
654 array.ranges[0].start = $1;
655 array.ranges[0].length = 1;
656 $$ = array;
657}
658|
659PE_VALUE PE_ARRAY_RANGE PE_VALUE
660{
661 struct parse_events_array array;
662
663 ABORT_ON($3 < $1);
664 array.nr_ranges = 1;
665 array.ranges = malloc(sizeof(array.ranges[0]));
666 ABORT_ON(!array.ranges);
667 array.ranges[0].start = $1;
668 array.ranges[0].length = $3 - $1 + 1;
669 $$ = array;
670}
671
672sep_dc: ':' |
673
674sep_slash_dc: '/' | ':' |
675
676%%
677
678void parse_events_error(YYLTYPE *loc, void *data,
679 void *scanner __maybe_unused,
680 char const *msg __maybe_unused)
681{
682 parse_events_evlist_error(data, loc->last_column, "parser error");
683}