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1// SPDX-License-Identifier: GPL-2.0
2#include <linux/hw_breakpoint.h>
3#include <linux/err.h>
4#include <linux/list_sort.h>
5#include <linux/zalloc.h>
6#include <dirent.h>
7#include <errno.h>
8#include <sys/ioctl.h>
9#include <sys/param.h>
10#include "term.h"
11#include "env.h"
12#include "evlist.h"
13#include "evsel.h"
14#include <subcmd/parse-options.h>
15#include "parse-events.h"
16#include "string2.h"
17#include "strbuf.h"
18#include "debug.h"
19#include <api/fs/tracing_path.h>
20#include <perf/cpumap.h>
21#include <util/parse-events-bison.h>
22#include <util/parse-events-flex.h>
23#include "pmu.h"
24#include "pmus.h"
25#include "asm/bug.h"
26#include "util/parse-branch-options.h"
27#include "util/evsel_config.h"
28#include "util/event.h"
29#include "util/bpf-filter.h"
30#include "util/util.h"
31#include "tracepoint.h"
32
33#define MAX_NAME_LEN 100
34
35static int get_config_terms(const struct parse_events_terms *head_config,
36 struct list_head *head_terms);
37static int parse_events_terms__copy(const struct parse_events_terms *src,
38 struct parse_events_terms *dest);
39
40const struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
41 [PERF_COUNT_HW_CPU_CYCLES] = {
42 .symbol = "cpu-cycles",
43 .alias = "cycles",
44 },
45 [PERF_COUNT_HW_INSTRUCTIONS] = {
46 .symbol = "instructions",
47 .alias = "",
48 },
49 [PERF_COUNT_HW_CACHE_REFERENCES] = {
50 .symbol = "cache-references",
51 .alias = "",
52 },
53 [PERF_COUNT_HW_CACHE_MISSES] = {
54 .symbol = "cache-misses",
55 .alias = "",
56 },
57 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
58 .symbol = "branch-instructions",
59 .alias = "branches",
60 },
61 [PERF_COUNT_HW_BRANCH_MISSES] = {
62 .symbol = "branch-misses",
63 .alias = "",
64 },
65 [PERF_COUNT_HW_BUS_CYCLES] = {
66 .symbol = "bus-cycles",
67 .alias = "",
68 },
69 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
70 .symbol = "stalled-cycles-frontend",
71 .alias = "idle-cycles-frontend",
72 },
73 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
74 .symbol = "stalled-cycles-backend",
75 .alias = "idle-cycles-backend",
76 },
77 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
78 .symbol = "ref-cycles",
79 .alias = "",
80 },
81};
82
83const struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
84 [PERF_COUNT_SW_CPU_CLOCK] = {
85 .symbol = "cpu-clock",
86 .alias = "",
87 },
88 [PERF_COUNT_SW_TASK_CLOCK] = {
89 .symbol = "task-clock",
90 .alias = "",
91 },
92 [PERF_COUNT_SW_PAGE_FAULTS] = {
93 .symbol = "page-faults",
94 .alias = "faults",
95 },
96 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
97 .symbol = "context-switches",
98 .alias = "cs",
99 },
100 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
101 .symbol = "cpu-migrations",
102 .alias = "migrations",
103 },
104 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
105 .symbol = "minor-faults",
106 .alias = "",
107 },
108 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
109 .symbol = "major-faults",
110 .alias = "",
111 },
112 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
113 .symbol = "alignment-faults",
114 .alias = "",
115 },
116 [PERF_COUNT_SW_EMULATION_FAULTS] = {
117 .symbol = "emulation-faults",
118 .alias = "",
119 },
120 [PERF_COUNT_SW_DUMMY] = {
121 .symbol = "dummy",
122 .alias = "",
123 },
124 [PERF_COUNT_SW_BPF_OUTPUT] = {
125 .symbol = "bpf-output",
126 .alias = "",
127 },
128 [PERF_COUNT_SW_CGROUP_SWITCHES] = {
129 .symbol = "cgroup-switches",
130 .alias = "",
131 },
132};
133
134const char *event_type(int type)
135{
136 switch (type) {
137 case PERF_TYPE_HARDWARE:
138 return "hardware";
139
140 case PERF_TYPE_SOFTWARE:
141 return "software";
142
143 case PERF_TYPE_TRACEPOINT:
144 return "tracepoint";
145
146 case PERF_TYPE_HW_CACHE:
147 return "hardware-cache";
148
149 default:
150 break;
151 }
152
153 return "unknown";
154}
155
156static char *get_config_str(const struct parse_events_terms *head_terms,
157 enum parse_events__term_type type_term)
158{
159 struct parse_events_term *term;
160
161 if (!head_terms)
162 return NULL;
163
164 list_for_each_entry(term, &head_terms->terms, list)
165 if (term->type_term == type_term)
166 return term->val.str;
167
168 return NULL;
169}
170
171static char *get_config_metric_id(const struct parse_events_terms *head_terms)
172{
173 return get_config_str(head_terms, PARSE_EVENTS__TERM_TYPE_METRIC_ID);
174}
175
176static char *get_config_name(const struct parse_events_terms *head_terms)
177{
178 return get_config_str(head_terms, PARSE_EVENTS__TERM_TYPE_NAME);
179}
180
181/**
182 * fix_raw - For each raw term see if there is an event (aka alias) in pmu that
183 * matches the raw's string value. If the string value matches an
184 * event then change the term to be an event, if not then change it to
185 * be a config term. For example, "read" may be an event of the PMU or
186 * a raw hex encoding of 0xead. The fix-up is done late so the PMU of
187 * the event can be determined and we don't need to scan all PMUs
188 * ahead-of-time.
189 * @config_terms: the list of terms that may contain a raw term.
190 * @pmu: the PMU to scan for events from.
191 */
192static void fix_raw(struct parse_events_terms *config_terms, struct perf_pmu *pmu)
193{
194 struct parse_events_term *term;
195
196 list_for_each_entry(term, &config_terms->terms, list) {
197 u64 num;
198
199 if (term->type_term != PARSE_EVENTS__TERM_TYPE_RAW)
200 continue;
201
202 if (perf_pmu__have_event(pmu, term->val.str)) {
203 zfree(&term->config);
204 term->config = term->val.str;
205 term->type_val = PARSE_EVENTS__TERM_TYPE_NUM;
206 term->type_term = PARSE_EVENTS__TERM_TYPE_USER;
207 term->val.num = 1;
208 term->no_value = true;
209 continue;
210 }
211
212 zfree(&term->config);
213 term->config = strdup("config");
214 errno = 0;
215 num = strtoull(term->val.str + 1, NULL, 16);
216 assert(errno == 0);
217 free(term->val.str);
218 term->type_val = PARSE_EVENTS__TERM_TYPE_NUM;
219 term->type_term = PARSE_EVENTS__TERM_TYPE_CONFIG;
220 term->val.num = num;
221 term->no_value = false;
222 }
223}
224
225static struct evsel *
226__add_event(struct list_head *list, int *idx,
227 struct perf_event_attr *attr,
228 bool init_attr,
229 const char *name, const char *metric_id, struct perf_pmu *pmu,
230 struct list_head *config_terms, bool auto_merge_stats,
231 struct perf_cpu_map *cpu_list, u64 alternate_hw_config)
232{
233 struct evsel *evsel;
234 struct perf_cpu_map *cpus = perf_cpu_map__is_empty(cpu_list) && pmu ? pmu->cpus : cpu_list;
235
236 cpus = perf_cpu_map__get(cpus);
237 if (pmu)
238 perf_pmu__warn_invalid_formats(pmu);
239
240 if (pmu && (attr->type == PERF_TYPE_RAW || attr->type >= PERF_TYPE_MAX)) {
241 perf_pmu__warn_invalid_config(pmu, attr->config, name,
242 PERF_PMU_FORMAT_VALUE_CONFIG, "config");
243 perf_pmu__warn_invalid_config(pmu, attr->config1, name,
244 PERF_PMU_FORMAT_VALUE_CONFIG1, "config1");
245 perf_pmu__warn_invalid_config(pmu, attr->config2, name,
246 PERF_PMU_FORMAT_VALUE_CONFIG2, "config2");
247 perf_pmu__warn_invalid_config(pmu, attr->config3, name,
248 PERF_PMU_FORMAT_VALUE_CONFIG3, "config3");
249 }
250 if (init_attr)
251 event_attr_init(attr);
252
253 evsel = evsel__new_idx(attr, *idx);
254 if (!evsel) {
255 perf_cpu_map__put(cpus);
256 return NULL;
257 }
258
259 (*idx)++;
260 evsel->core.cpus = cpus;
261 evsel->core.own_cpus = perf_cpu_map__get(cpus);
262 evsel->core.requires_cpu = pmu ? pmu->is_uncore : false;
263 evsel->core.is_pmu_core = pmu ? pmu->is_core : false;
264 evsel->auto_merge_stats = auto_merge_stats;
265 evsel->pmu = pmu;
266 evsel->alternate_hw_config = alternate_hw_config;
267
268 if (name)
269 evsel->name = strdup(name);
270
271 if (metric_id)
272 evsel->metric_id = strdup(metric_id);
273
274 if (config_terms)
275 list_splice_init(config_terms, &evsel->config_terms);
276
277 if (list)
278 list_add_tail(&evsel->core.node, list);
279
280 return evsel;
281}
282
283struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr,
284 const char *name, const char *metric_id,
285 struct perf_pmu *pmu)
286{
287 return __add_event(/*list=*/NULL, &idx, attr, /*init_attr=*/false, name,
288 metric_id, pmu, /*config_terms=*/NULL,
289 /*auto_merge_stats=*/false, /*cpu_list=*/NULL,
290 /*alternate_hw_config=*/PERF_COUNT_HW_MAX);
291}
292
293static int add_event(struct list_head *list, int *idx,
294 struct perf_event_attr *attr, const char *name,
295 const char *metric_id, struct list_head *config_terms,
296 u64 alternate_hw_config)
297{
298 return __add_event(list, idx, attr, /*init_attr*/true, name, metric_id,
299 /*pmu=*/NULL, config_terms,
300 /*auto_merge_stats=*/false, /*cpu_list=*/NULL,
301 alternate_hw_config) ? 0 : -ENOMEM;
302}
303
304/**
305 * parse_aliases - search names for entries beginning or equalling str ignoring
306 * case. If mutliple entries in names match str then the longest
307 * is chosen.
308 * @str: The needle to look for.
309 * @names: The haystack to search.
310 * @size: The size of the haystack.
311 * @longest: Out argument giving the length of the matching entry.
312 */
313static int parse_aliases(const char *str, const char *const names[][EVSEL__MAX_ALIASES], int size,
314 int *longest)
315{
316 *longest = -1;
317 for (int i = 0; i < size; i++) {
318 for (int j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) {
319 int n = strlen(names[i][j]);
320
321 if (n > *longest && !strncasecmp(str, names[i][j], n))
322 *longest = n;
323 }
324 if (*longest > 0)
325 return i;
326 }
327
328 return -1;
329}
330
331typedef int config_term_func_t(struct perf_event_attr *attr,
332 struct parse_events_term *term,
333 struct parse_events_error *err);
334static int config_term_common(struct perf_event_attr *attr,
335 struct parse_events_term *term,
336 struct parse_events_error *err);
337static int config_attr(struct perf_event_attr *attr,
338 const struct parse_events_terms *head,
339 struct parse_events_error *err,
340 config_term_func_t config_term);
341
342/**
343 * parse_events__decode_legacy_cache - Search name for the legacy cache event
344 * name composed of 1, 2 or 3 hyphen
345 * separated sections. The first section is
346 * the cache type while the others are the
347 * optional op and optional result. To make
348 * life hard the names in the table also
349 * contain hyphens and the longest name
350 * should always be selected.
351 */
352int parse_events__decode_legacy_cache(const char *name, int extended_pmu_type, __u64 *config)
353{
354 int len, cache_type = -1, cache_op = -1, cache_result = -1;
355 const char *name_end = &name[strlen(name) + 1];
356 const char *str = name;
357
358 cache_type = parse_aliases(str, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX, &len);
359 if (cache_type == -1)
360 return -EINVAL;
361 str += len + 1;
362
363 if (str < name_end) {
364 cache_op = parse_aliases(str, evsel__hw_cache_op,
365 PERF_COUNT_HW_CACHE_OP_MAX, &len);
366 if (cache_op >= 0) {
367 if (!evsel__is_cache_op_valid(cache_type, cache_op))
368 return -EINVAL;
369 str += len + 1;
370 } else {
371 cache_result = parse_aliases(str, evsel__hw_cache_result,
372 PERF_COUNT_HW_CACHE_RESULT_MAX, &len);
373 if (cache_result >= 0)
374 str += len + 1;
375 }
376 }
377 if (str < name_end) {
378 if (cache_op < 0) {
379 cache_op = parse_aliases(str, evsel__hw_cache_op,
380 PERF_COUNT_HW_CACHE_OP_MAX, &len);
381 if (cache_op >= 0) {
382 if (!evsel__is_cache_op_valid(cache_type, cache_op))
383 return -EINVAL;
384 }
385 } else if (cache_result < 0) {
386 cache_result = parse_aliases(str, evsel__hw_cache_result,
387 PERF_COUNT_HW_CACHE_RESULT_MAX, &len);
388 }
389 }
390
391 /*
392 * Fall back to reads:
393 */
394 if (cache_op == -1)
395 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
396
397 /*
398 * Fall back to accesses:
399 */
400 if (cache_result == -1)
401 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
402
403 *config = cache_type | (cache_op << 8) | (cache_result << 16);
404 if (perf_pmus__supports_extended_type())
405 *config |= (__u64)extended_pmu_type << PERF_PMU_TYPE_SHIFT;
406 return 0;
407}
408
409/**
410 * parse_events__filter_pmu - returns false if a wildcard PMU should be
411 * considered, true if it should be filtered.
412 */
413bool parse_events__filter_pmu(const struct parse_events_state *parse_state,
414 const struct perf_pmu *pmu)
415{
416 if (parse_state->pmu_filter == NULL)
417 return false;
418
419 return strcmp(parse_state->pmu_filter, pmu->name) != 0;
420}
421
422static int parse_events_add_pmu(struct parse_events_state *parse_state,
423 struct list_head *list, struct perf_pmu *pmu,
424 const struct parse_events_terms *const_parsed_terms,
425 bool auto_merge_stats, u64 alternate_hw_config);
426
427int parse_events_add_cache(struct list_head *list, int *idx, const char *name,
428 struct parse_events_state *parse_state,
429 struct parse_events_terms *parsed_terms)
430{
431 struct perf_pmu *pmu = NULL;
432 bool found_supported = false;
433 const char *config_name = get_config_name(parsed_terms);
434 const char *metric_id = get_config_metric_id(parsed_terms);
435
436 while ((pmu = perf_pmus__scan(pmu)) != NULL) {
437 LIST_HEAD(config_terms);
438 struct perf_event_attr attr;
439 int ret;
440
441 if (parse_events__filter_pmu(parse_state, pmu))
442 continue;
443
444 if (perf_pmu__have_event(pmu, name)) {
445 /*
446 * The PMU has the event so add as not a legacy cache
447 * event.
448 */
449 ret = parse_events_add_pmu(parse_state, list, pmu,
450 parsed_terms,
451 perf_pmu__auto_merge_stats(pmu),
452 /*alternate_hw_config=*/PERF_COUNT_HW_MAX);
453 if (ret)
454 return ret;
455 continue;
456 }
457
458 if (!pmu->is_core) {
459 /* Legacy cache events are only supported by core PMUs. */
460 continue;
461 }
462
463 memset(&attr, 0, sizeof(attr));
464 attr.type = PERF_TYPE_HW_CACHE;
465
466 ret = parse_events__decode_legacy_cache(name, pmu->type, &attr.config);
467 if (ret)
468 return ret;
469
470 found_supported = true;
471
472 if (parsed_terms) {
473 if (config_attr(&attr, parsed_terms, parse_state->error,
474 config_term_common))
475 return -EINVAL;
476
477 if (get_config_terms(parsed_terms, &config_terms))
478 return -ENOMEM;
479 }
480
481 if (__add_event(list, idx, &attr, /*init_attr*/true, config_name ?: name,
482 metric_id, pmu, &config_terms, /*auto_merge_stats=*/false,
483 /*cpu_list=*/NULL,
484 /*alternate_hw_config=*/PERF_COUNT_HW_MAX) == NULL)
485 return -ENOMEM;
486
487 free_config_terms(&config_terms);
488 }
489 return found_supported ? 0 : -EINVAL;
490}
491
492#ifdef HAVE_LIBTRACEEVENT
493static void tracepoint_error(struct parse_events_error *e, int err,
494 const char *sys, const char *name, int column)
495{
496 const char *str;
497 char help[BUFSIZ];
498
499 if (!e)
500 return;
501
502 /*
503 * We get error directly from syscall errno ( > 0),
504 * or from encoded pointer's error ( < 0).
505 */
506 err = abs(err);
507
508 switch (err) {
509 case EACCES:
510 str = "can't access trace events";
511 break;
512 case ENOENT:
513 str = "unknown tracepoint";
514 break;
515 default:
516 str = "failed to add tracepoint";
517 break;
518 }
519
520 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
521 parse_events_error__handle(e, column, strdup(str), strdup(help));
522}
523
524static int add_tracepoint(struct parse_events_state *parse_state,
525 struct list_head *list,
526 const char *sys_name, const char *evt_name,
527 struct parse_events_error *err,
528 struct parse_events_terms *head_config, void *loc_)
529{
530 YYLTYPE *loc = loc_;
531 struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, parse_state->idx++,
532 !parse_state->fake_tp);
533
534 if (IS_ERR(evsel)) {
535 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name, loc->first_column);
536 return PTR_ERR(evsel);
537 }
538
539 if (head_config) {
540 LIST_HEAD(config_terms);
541
542 if (get_config_terms(head_config, &config_terms))
543 return -ENOMEM;
544 list_splice(&config_terms, &evsel->config_terms);
545 }
546
547 list_add_tail(&evsel->core.node, list);
548 return 0;
549}
550
551static int add_tracepoint_multi_event(struct parse_events_state *parse_state,
552 struct list_head *list,
553 const char *sys_name, const char *evt_name,
554 struct parse_events_error *err,
555 struct parse_events_terms *head_config, YYLTYPE *loc)
556{
557 char *evt_path;
558 struct dirent *evt_ent;
559 DIR *evt_dir;
560 int ret = 0, found = 0;
561
562 evt_path = get_events_file(sys_name);
563 if (!evt_path) {
564 tracepoint_error(err, errno, sys_name, evt_name, loc->first_column);
565 return -1;
566 }
567 evt_dir = opendir(evt_path);
568 if (!evt_dir) {
569 put_events_file(evt_path);
570 tracepoint_error(err, errno, sys_name, evt_name, loc->first_column);
571 return -1;
572 }
573
574 while (!ret && (evt_ent = readdir(evt_dir))) {
575 if (!strcmp(evt_ent->d_name, ".")
576 || !strcmp(evt_ent->d_name, "..")
577 || !strcmp(evt_ent->d_name, "enable")
578 || !strcmp(evt_ent->d_name, "filter"))
579 continue;
580
581 if (!strglobmatch(evt_ent->d_name, evt_name))
582 continue;
583
584 found++;
585
586 ret = add_tracepoint(parse_state, list, sys_name, evt_ent->d_name,
587 err, head_config, loc);
588 }
589
590 if (!found) {
591 tracepoint_error(err, ENOENT, sys_name, evt_name, loc->first_column);
592 ret = -1;
593 }
594
595 put_events_file(evt_path);
596 closedir(evt_dir);
597 return ret;
598}
599
600static int add_tracepoint_event(struct parse_events_state *parse_state,
601 struct list_head *list,
602 const char *sys_name, const char *evt_name,
603 struct parse_events_error *err,
604 struct parse_events_terms *head_config, YYLTYPE *loc)
605{
606 return strpbrk(evt_name, "*?") ?
607 add_tracepoint_multi_event(parse_state, list, sys_name, evt_name,
608 err, head_config, loc) :
609 add_tracepoint(parse_state, list, sys_name, evt_name,
610 err, head_config, loc);
611}
612
613static int add_tracepoint_multi_sys(struct parse_events_state *parse_state,
614 struct list_head *list,
615 const char *sys_name, const char *evt_name,
616 struct parse_events_error *err,
617 struct parse_events_terms *head_config, YYLTYPE *loc)
618{
619 struct dirent *events_ent;
620 DIR *events_dir;
621 int ret = 0;
622
623 events_dir = tracing_events__opendir();
624 if (!events_dir) {
625 tracepoint_error(err, errno, sys_name, evt_name, loc->first_column);
626 return -1;
627 }
628
629 while (!ret && (events_ent = readdir(events_dir))) {
630 if (!strcmp(events_ent->d_name, ".")
631 || !strcmp(events_ent->d_name, "..")
632 || !strcmp(events_ent->d_name, "enable")
633 || !strcmp(events_ent->d_name, "header_event")
634 || !strcmp(events_ent->d_name, "header_page"))
635 continue;
636
637 if (!strglobmatch(events_ent->d_name, sys_name))
638 continue;
639
640 ret = add_tracepoint_event(parse_state, list, events_ent->d_name,
641 evt_name, err, head_config, loc);
642 }
643
644 closedir(events_dir);
645 return ret;
646}
647#endif /* HAVE_LIBTRACEEVENT */
648
649size_t default_breakpoint_len(void)
650{
651#if defined(__i386__)
652 static int len;
653
654 if (len == 0) {
655 struct perf_env env = {};
656
657 perf_env__init(&env);
658 len = perf_env__kernel_is_64_bit(&env) ? sizeof(u64) : sizeof(long);
659 perf_env__exit(&env);
660 }
661 return len;
662#elif defined(__aarch64__)
663 return 4;
664#else
665 return sizeof(long);
666#endif
667}
668
669static int
670parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
671{
672 int i;
673
674 for (i = 0; i < 3; i++) {
675 if (!type || !type[i])
676 break;
677
678#define CHECK_SET_TYPE(bit) \
679do { \
680 if (attr->bp_type & bit) \
681 return -EINVAL; \
682 else \
683 attr->bp_type |= bit; \
684} while (0)
685
686 switch (type[i]) {
687 case 'r':
688 CHECK_SET_TYPE(HW_BREAKPOINT_R);
689 break;
690 case 'w':
691 CHECK_SET_TYPE(HW_BREAKPOINT_W);
692 break;
693 case 'x':
694 CHECK_SET_TYPE(HW_BREAKPOINT_X);
695 break;
696 default:
697 return -EINVAL;
698 }
699 }
700
701#undef CHECK_SET_TYPE
702
703 if (!attr->bp_type) /* Default */
704 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
705
706 return 0;
707}
708
709int parse_events_add_breakpoint(struct parse_events_state *parse_state,
710 struct list_head *list,
711 u64 addr, char *type, u64 len,
712 struct parse_events_terms *head_config)
713{
714 struct perf_event_attr attr;
715 LIST_HEAD(config_terms);
716 const char *name;
717
718 memset(&attr, 0, sizeof(attr));
719 attr.bp_addr = addr;
720
721 if (parse_breakpoint_type(type, &attr))
722 return -EINVAL;
723
724 /* Provide some defaults if len is not specified */
725 if (!len) {
726 if (attr.bp_type == HW_BREAKPOINT_X)
727 len = default_breakpoint_len();
728 else
729 len = HW_BREAKPOINT_LEN_4;
730 }
731
732 attr.bp_len = len;
733
734 attr.type = PERF_TYPE_BREAKPOINT;
735 attr.sample_period = 1;
736
737 if (head_config) {
738 if (config_attr(&attr, head_config, parse_state->error,
739 config_term_common))
740 return -EINVAL;
741
742 if (get_config_terms(head_config, &config_terms))
743 return -ENOMEM;
744 }
745
746 name = get_config_name(head_config);
747
748 return add_event(list, &parse_state->idx, &attr, name, /*mertic_id=*/NULL,
749 &config_terms, /*alternate_hw_config=*/PERF_COUNT_HW_MAX);
750}
751
752static int check_type_val(struct parse_events_term *term,
753 struct parse_events_error *err,
754 enum parse_events__term_val_type type)
755{
756 if (type == term->type_val)
757 return 0;
758
759 if (err) {
760 parse_events_error__handle(err, term->err_val,
761 type == PARSE_EVENTS__TERM_TYPE_NUM
762 ? strdup("expected numeric value")
763 : strdup("expected string value"),
764 NULL);
765 }
766 return -EINVAL;
767}
768
769static bool config_term_shrinked;
770
771const char *parse_events__term_type_str(enum parse_events__term_type term_type)
772{
773 /*
774 * Update according to parse-events.l
775 */
776 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
777 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>",
778 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config",
779 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1",
780 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2",
781 [PARSE_EVENTS__TERM_TYPE_CONFIG3] = "config3",
782 [PARSE_EVENTS__TERM_TYPE_NAME] = "name",
783 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period",
784 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq",
785 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type",
786 [PARSE_EVENTS__TERM_TYPE_TIME] = "time",
787 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph",
788 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size",
789 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit",
790 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit",
791 [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack",
792 [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS] = "nr",
793 [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite",
794 [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite",
795 [PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config",
796 [PARSE_EVENTS__TERM_TYPE_PERCORE] = "percore",
797 [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT] = "aux-output",
798 [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE] = "aux-sample-size",
799 [PARSE_EVENTS__TERM_TYPE_METRIC_ID] = "metric-id",
800 [PARSE_EVENTS__TERM_TYPE_RAW] = "raw",
801 [PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE] = "legacy-cache",
802 [PARSE_EVENTS__TERM_TYPE_HARDWARE] = "hardware",
803 };
804 if ((unsigned int)term_type >= __PARSE_EVENTS__TERM_TYPE_NR)
805 return "unknown term";
806
807 return config_term_names[term_type];
808}
809
810static bool
811config_term_avail(enum parse_events__term_type term_type, struct parse_events_error *err)
812{
813 char *err_str;
814
815 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
816 parse_events_error__handle(err, -1,
817 strdup("Invalid term_type"), NULL);
818 return false;
819 }
820 if (!config_term_shrinked)
821 return true;
822
823 switch (term_type) {
824 case PARSE_EVENTS__TERM_TYPE_CONFIG:
825 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
826 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
827 case PARSE_EVENTS__TERM_TYPE_CONFIG3:
828 case PARSE_EVENTS__TERM_TYPE_NAME:
829 case PARSE_EVENTS__TERM_TYPE_METRIC_ID:
830 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
831 case PARSE_EVENTS__TERM_TYPE_PERCORE:
832 return true;
833 case PARSE_EVENTS__TERM_TYPE_USER:
834 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
835 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
836 case PARSE_EVENTS__TERM_TYPE_TIME:
837 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
838 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
839 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
840 case PARSE_EVENTS__TERM_TYPE_INHERIT:
841 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
842 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
843 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
844 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
845 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
846 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
847 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
848 case PARSE_EVENTS__TERM_TYPE_RAW:
849 case PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE:
850 case PARSE_EVENTS__TERM_TYPE_HARDWARE:
851 default:
852 if (!err)
853 return false;
854
855 /* term_type is validated so indexing is safe */
856 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
857 parse_events__term_type_str(term_type)) >= 0)
858 parse_events_error__handle(err, -1, err_str, NULL);
859 return false;
860 }
861}
862
863void parse_events__shrink_config_terms(void)
864{
865 config_term_shrinked = true;
866}
867
868static int config_term_common(struct perf_event_attr *attr,
869 struct parse_events_term *term,
870 struct parse_events_error *err)
871{
872#define CHECK_TYPE_VAL(type) \
873do { \
874 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
875 return -EINVAL; \
876} while (0)
877
878 switch (term->type_term) {
879 case PARSE_EVENTS__TERM_TYPE_CONFIG:
880 CHECK_TYPE_VAL(NUM);
881 attr->config = term->val.num;
882 break;
883 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
884 CHECK_TYPE_VAL(NUM);
885 attr->config1 = term->val.num;
886 break;
887 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
888 CHECK_TYPE_VAL(NUM);
889 attr->config2 = term->val.num;
890 break;
891 case PARSE_EVENTS__TERM_TYPE_CONFIG3:
892 CHECK_TYPE_VAL(NUM);
893 attr->config3 = term->val.num;
894 break;
895 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
896 CHECK_TYPE_VAL(NUM);
897 break;
898 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
899 CHECK_TYPE_VAL(NUM);
900 break;
901 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
902 CHECK_TYPE_VAL(STR);
903 if (strcmp(term->val.str, "no") &&
904 parse_branch_str(term->val.str,
905 &attr->branch_sample_type)) {
906 parse_events_error__handle(err, term->err_val,
907 strdup("invalid branch sample type"),
908 NULL);
909 return -EINVAL;
910 }
911 break;
912 case PARSE_EVENTS__TERM_TYPE_TIME:
913 CHECK_TYPE_VAL(NUM);
914 if (term->val.num > 1) {
915 parse_events_error__handle(err, term->err_val,
916 strdup("expected 0 or 1"),
917 NULL);
918 return -EINVAL;
919 }
920 break;
921 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
922 CHECK_TYPE_VAL(STR);
923 break;
924 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
925 CHECK_TYPE_VAL(NUM);
926 break;
927 case PARSE_EVENTS__TERM_TYPE_INHERIT:
928 CHECK_TYPE_VAL(NUM);
929 break;
930 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
931 CHECK_TYPE_VAL(NUM);
932 break;
933 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
934 CHECK_TYPE_VAL(NUM);
935 break;
936 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
937 CHECK_TYPE_VAL(NUM);
938 break;
939 case PARSE_EVENTS__TERM_TYPE_NAME:
940 CHECK_TYPE_VAL(STR);
941 break;
942 case PARSE_EVENTS__TERM_TYPE_METRIC_ID:
943 CHECK_TYPE_VAL(STR);
944 break;
945 case PARSE_EVENTS__TERM_TYPE_RAW:
946 CHECK_TYPE_VAL(STR);
947 break;
948 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
949 CHECK_TYPE_VAL(NUM);
950 break;
951 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
952 CHECK_TYPE_VAL(NUM);
953 break;
954 case PARSE_EVENTS__TERM_TYPE_PERCORE:
955 CHECK_TYPE_VAL(NUM);
956 if ((unsigned int)term->val.num > 1) {
957 parse_events_error__handle(err, term->err_val,
958 strdup("expected 0 or 1"),
959 NULL);
960 return -EINVAL;
961 }
962 break;
963 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
964 CHECK_TYPE_VAL(NUM);
965 break;
966 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
967 CHECK_TYPE_VAL(NUM);
968 if (term->val.num > UINT_MAX) {
969 parse_events_error__handle(err, term->err_val,
970 strdup("too big"),
971 NULL);
972 return -EINVAL;
973 }
974 break;
975 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
976 case PARSE_EVENTS__TERM_TYPE_USER:
977 case PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE:
978 case PARSE_EVENTS__TERM_TYPE_HARDWARE:
979 default:
980 parse_events_error__handle(err, term->err_term,
981 strdup(parse_events__term_type_str(term->type_term)),
982 parse_events_formats_error_string(NULL));
983 return -EINVAL;
984 }
985
986 /*
987 * Check term availability after basic checking so
988 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
989 *
990 * If check availability at the entry of this function,
991 * user will see "'<sysfs term>' is not usable in 'perf stat'"
992 * if an invalid config term is provided for legacy events
993 * (for example, instructions/badterm/...), which is confusing.
994 */
995 if (!config_term_avail(term->type_term, err))
996 return -EINVAL;
997 return 0;
998#undef CHECK_TYPE_VAL
999}
1000
1001static int config_term_pmu(struct perf_event_attr *attr,
1002 struct parse_events_term *term,
1003 struct parse_events_error *err)
1004{
1005 if (term->type_term == PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE) {
1006 struct perf_pmu *pmu = perf_pmus__find_by_type(attr->type);
1007
1008 if (!pmu) {
1009 char *err_str;
1010
1011 if (asprintf(&err_str, "Failed to find PMU for type %d", attr->type) >= 0)
1012 parse_events_error__handle(err, term->err_term,
1013 err_str, /*help=*/NULL);
1014 return -EINVAL;
1015 }
1016 /*
1017 * Rewrite the PMU event to a legacy cache one unless the PMU
1018 * doesn't support legacy cache events or the event is present
1019 * within the PMU.
1020 */
1021 if (perf_pmu__supports_legacy_cache(pmu) &&
1022 !perf_pmu__have_event(pmu, term->config)) {
1023 attr->type = PERF_TYPE_HW_CACHE;
1024 return parse_events__decode_legacy_cache(term->config, pmu->type,
1025 &attr->config);
1026 } else {
1027 term->type_term = PARSE_EVENTS__TERM_TYPE_USER;
1028 term->no_value = true;
1029 }
1030 }
1031 if (term->type_term == PARSE_EVENTS__TERM_TYPE_HARDWARE) {
1032 struct perf_pmu *pmu = perf_pmus__find_by_type(attr->type);
1033
1034 if (!pmu) {
1035 char *err_str;
1036
1037 if (asprintf(&err_str, "Failed to find PMU for type %d", attr->type) >= 0)
1038 parse_events_error__handle(err, term->err_term,
1039 err_str, /*help=*/NULL);
1040 return -EINVAL;
1041 }
1042 /*
1043 * If the PMU has a sysfs or json event prefer it over
1044 * legacy. ARM requires this.
1045 */
1046 if (perf_pmu__have_event(pmu, term->config)) {
1047 term->type_term = PARSE_EVENTS__TERM_TYPE_USER;
1048 term->no_value = true;
1049 term->alternate_hw_config = true;
1050 } else {
1051 attr->type = PERF_TYPE_HARDWARE;
1052 attr->config = term->val.num;
1053 if (perf_pmus__supports_extended_type())
1054 attr->config |= (__u64)pmu->type << PERF_PMU_TYPE_SHIFT;
1055 }
1056 return 0;
1057 }
1058 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1059 term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG) {
1060 /*
1061 * Always succeed for sysfs terms, as we dont know
1062 * at this point what type they need to have.
1063 */
1064 return 0;
1065 }
1066 return config_term_common(attr, term, err);
1067}
1068
1069#ifdef HAVE_LIBTRACEEVENT
1070static int config_term_tracepoint(struct perf_event_attr *attr,
1071 struct parse_events_term *term,
1072 struct parse_events_error *err)
1073{
1074 switch (term->type_term) {
1075 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1076 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1077 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1078 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1079 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1080 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1081 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1082 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1083 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1084 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1085 return config_term_common(attr, term, err);
1086 case PARSE_EVENTS__TERM_TYPE_USER:
1087 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1088 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1089 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1090 case PARSE_EVENTS__TERM_TYPE_CONFIG3:
1091 case PARSE_EVENTS__TERM_TYPE_NAME:
1092 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1093 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1094 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1095 case PARSE_EVENTS__TERM_TYPE_TIME:
1096 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1097 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1098 case PARSE_EVENTS__TERM_TYPE_METRIC_ID:
1099 case PARSE_EVENTS__TERM_TYPE_RAW:
1100 case PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE:
1101 case PARSE_EVENTS__TERM_TYPE_HARDWARE:
1102 default:
1103 if (err) {
1104 parse_events_error__handle(err, term->err_term,
1105 strdup(parse_events__term_type_str(term->type_term)),
1106 strdup("valid terms: call-graph,stack-size\n")
1107 );
1108 }
1109 return -EINVAL;
1110 }
1111
1112 return 0;
1113}
1114#endif
1115
1116static int config_attr(struct perf_event_attr *attr,
1117 const struct parse_events_terms *head,
1118 struct parse_events_error *err,
1119 config_term_func_t config_term)
1120{
1121 struct parse_events_term *term;
1122
1123 list_for_each_entry(term, &head->terms, list)
1124 if (config_term(attr, term, err))
1125 return -EINVAL;
1126
1127 return 0;
1128}
1129
1130static int get_config_terms(const struct parse_events_terms *head_config,
1131 struct list_head *head_terms)
1132{
1133#define ADD_CONFIG_TERM(__type, __weak) \
1134 struct evsel_config_term *__t; \
1135 \
1136 __t = zalloc(sizeof(*__t)); \
1137 if (!__t) \
1138 return -ENOMEM; \
1139 \
1140 INIT_LIST_HEAD(&__t->list); \
1141 __t->type = EVSEL__CONFIG_TERM_ ## __type; \
1142 __t->weak = __weak; \
1143 list_add_tail(&__t->list, head_terms)
1144
1145#define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak) \
1146do { \
1147 ADD_CONFIG_TERM(__type, __weak); \
1148 __t->val.__name = __val; \
1149} while (0)
1150
1151#define ADD_CONFIG_TERM_STR(__type, __val, __weak) \
1152do { \
1153 ADD_CONFIG_TERM(__type, __weak); \
1154 __t->val.str = strdup(__val); \
1155 if (!__t->val.str) { \
1156 zfree(&__t); \
1157 return -ENOMEM; \
1158 } \
1159 __t->free_str = true; \
1160} while (0)
1161
1162 struct parse_events_term *term;
1163
1164 list_for_each_entry(term, &head_config->terms, list) {
1165 switch (term->type_term) {
1166 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1167 ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1168 break;
1169 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1170 ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1171 break;
1172 case PARSE_EVENTS__TERM_TYPE_TIME:
1173 ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1174 break;
1175 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1176 ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1177 break;
1178 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1179 ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1180 break;
1181 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1182 ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1183 term->val.num, term->weak);
1184 break;
1185 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1186 ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1187 term->val.num ? 1 : 0, term->weak);
1188 break;
1189 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1190 ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1191 term->val.num ? 0 : 1, term->weak);
1192 break;
1193 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1194 ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1195 term->val.num, term->weak);
1196 break;
1197 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1198 ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1199 term->val.num, term->weak);
1200 break;
1201 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1202 ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1203 term->val.num ? 1 : 0, term->weak);
1204 break;
1205 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1206 ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1207 term->val.num ? 0 : 1, term->weak);
1208 break;
1209 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1210 ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1211 break;
1212 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1213 ADD_CONFIG_TERM_VAL(PERCORE, percore,
1214 term->val.num ? true : false, term->weak);
1215 break;
1216 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1217 ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1218 term->val.num ? 1 : 0, term->weak);
1219 break;
1220 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1221 ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1222 term->val.num, term->weak);
1223 break;
1224 case PARSE_EVENTS__TERM_TYPE_USER:
1225 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1226 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1227 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1228 case PARSE_EVENTS__TERM_TYPE_CONFIG3:
1229 case PARSE_EVENTS__TERM_TYPE_NAME:
1230 case PARSE_EVENTS__TERM_TYPE_METRIC_ID:
1231 case PARSE_EVENTS__TERM_TYPE_RAW:
1232 case PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE:
1233 case PARSE_EVENTS__TERM_TYPE_HARDWARE:
1234 default:
1235 break;
1236 }
1237 }
1238 return 0;
1239}
1240
1241/*
1242 * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1243 * each bit of attr->config that the user has changed.
1244 */
1245static int get_config_chgs(struct perf_pmu *pmu, struct parse_events_terms *head_config,
1246 struct list_head *head_terms)
1247{
1248 struct parse_events_term *term;
1249 u64 bits = 0;
1250 int type;
1251
1252 list_for_each_entry(term, &head_config->terms, list) {
1253 switch (term->type_term) {
1254 case PARSE_EVENTS__TERM_TYPE_USER:
1255 type = perf_pmu__format_type(pmu, term->config);
1256 if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1257 continue;
1258 bits |= perf_pmu__format_bits(pmu, term->config);
1259 break;
1260 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1261 bits = ~(u64)0;
1262 break;
1263 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1264 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1265 case PARSE_EVENTS__TERM_TYPE_CONFIG3:
1266 case PARSE_EVENTS__TERM_TYPE_NAME:
1267 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1268 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1269 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1270 case PARSE_EVENTS__TERM_TYPE_TIME:
1271 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1272 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1273 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1274 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1275 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1276 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1277 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1278 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1279 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1280 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1281 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1282 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1283 case PARSE_EVENTS__TERM_TYPE_METRIC_ID:
1284 case PARSE_EVENTS__TERM_TYPE_RAW:
1285 case PARSE_EVENTS__TERM_TYPE_LEGACY_CACHE:
1286 case PARSE_EVENTS__TERM_TYPE_HARDWARE:
1287 default:
1288 break;
1289 }
1290 }
1291
1292 if (bits)
1293 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1294
1295#undef ADD_CONFIG_TERM
1296 return 0;
1297}
1298
1299int parse_events_add_tracepoint(struct parse_events_state *parse_state,
1300 struct list_head *list,
1301 const char *sys, const char *event,
1302 struct parse_events_error *err,
1303 struct parse_events_terms *head_config, void *loc_)
1304{
1305 YYLTYPE *loc = loc_;
1306#ifdef HAVE_LIBTRACEEVENT
1307 if (head_config) {
1308 struct perf_event_attr attr;
1309
1310 if (config_attr(&attr, head_config, err,
1311 config_term_tracepoint))
1312 return -EINVAL;
1313 }
1314
1315 if (strpbrk(sys, "*?"))
1316 return add_tracepoint_multi_sys(parse_state, list, sys, event,
1317 err, head_config, loc);
1318 else
1319 return add_tracepoint_event(parse_state, list, sys, event,
1320 err, head_config, loc);
1321#else
1322 (void)parse_state;
1323 (void)list;
1324 (void)sys;
1325 (void)event;
1326 (void)head_config;
1327 parse_events_error__handle(err, loc->first_column, strdup("unsupported tracepoint"),
1328 strdup("libtraceevent is necessary for tracepoint support"));
1329 return -1;
1330#endif
1331}
1332
1333static int __parse_events_add_numeric(struct parse_events_state *parse_state,
1334 struct list_head *list,
1335 struct perf_pmu *pmu, u32 type, u32 extended_type,
1336 u64 config, const struct parse_events_terms *head_config)
1337{
1338 struct perf_event_attr attr;
1339 LIST_HEAD(config_terms);
1340 const char *name, *metric_id;
1341 int ret;
1342
1343 memset(&attr, 0, sizeof(attr));
1344 attr.type = type;
1345 attr.config = config;
1346 if (extended_type && (type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE)) {
1347 assert(perf_pmus__supports_extended_type());
1348 attr.config |= (u64)extended_type << PERF_PMU_TYPE_SHIFT;
1349 }
1350
1351 if (head_config) {
1352 if (config_attr(&attr, head_config, parse_state->error,
1353 config_term_common))
1354 return -EINVAL;
1355
1356 if (get_config_terms(head_config, &config_terms))
1357 return -ENOMEM;
1358 }
1359
1360 name = get_config_name(head_config);
1361 metric_id = get_config_metric_id(head_config);
1362 ret = __add_event(list, &parse_state->idx, &attr, /*init_attr*/true, name,
1363 metric_id, pmu, &config_terms, /*auto_merge_stats=*/false,
1364 /*cpu_list=*/NULL, /*alternate_hw_config=*/PERF_COUNT_HW_MAX
1365 ) == NULL ? -ENOMEM : 0;
1366 free_config_terms(&config_terms);
1367 return ret;
1368}
1369
1370int parse_events_add_numeric(struct parse_events_state *parse_state,
1371 struct list_head *list,
1372 u32 type, u64 config,
1373 const struct parse_events_terms *head_config,
1374 bool wildcard)
1375{
1376 struct perf_pmu *pmu = NULL;
1377 bool found_supported = false;
1378
1379 /* Wildcards on numeric values are only supported by core PMUs. */
1380 if (wildcard && perf_pmus__supports_extended_type()) {
1381 while ((pmu = perf_pmus__scan_core(pmu)) != NULL) {
1382 int ret;
1383
1384 found_supported = true;
1385 if (parse_events__filter_pmu(parse_state, pmu))
1386 continue;
1387
1388 ret = __parse_events_add_numeric(parse_state, list, pmu,
1389 type, pmu->type,
1390 config, head_config);
1391 if (ret)
1392 return ret;
1393 }
1394 if (found_supported)
1395 return 0;
1396 }
1397 return __parse_events_add_numeric(parse_state, list, perf_pmus__find_by_type(type),
1398 type, /*extended_type=*/0, config, head_config);
1399}
1400
1401static bool config_term_percore(struct list_head *config_terms)
1402{
1403 struct evsel_config_term *term;
1404
1405 list_for_each_entry(term, config_terms, list) {
1406 if (term->type == EVSEL__CONFIG_TERM_PERCORE)
1407 return term->val.percore;
1408 }
1409
1410 return false;
1411}
1412
1413static int parse_events_add_pmu(struct parse_events_state *parse_state,
1414 struct list_head *list, struct perf_pmu *pmu,
1415 const struct parse_events_terms *const_parsed_terms,
1416 bool auto_merge_stats, u64 alternate_hw_config)
1417{
1418 struct perf_event_attr attr;
1419 struct perf_pmu_info info;
1420 struct evsel *evsel;
1421 struct parse_events_error *err = parse_state->error;
1422 LIST_HEAD(config_terms);
1423 struct parse_events_terms parsed_terms;
1424 bool alias_rewrote_terms = false;
1425
1426 if (verbose > 1) {
1427 struct strbuf sb;
1428
1429 strbuf_init(&sb, /*hint=*/ 0);
1430 if (pmu->selectable && const_parsed_terms &&
1431 list_empty(&const_parsed_terms->terms)) {
1432 strbuf_addf(&sb, "%s//", pmu->name);
1433 } else {
1434 strbuf_addf(&sb, "%s/", pmu->name);
1435 parse_events_terms__to_strbuf(const_parsed_terms, &sb);
1436 strbuf_addch(&sb, '/');
1437 }
1438 fprintf(stderr, "Attempt to add: %s\n", sb.buf);
1439 strbuf_release(&sb);
1440 }
1441
1442 memset(&attr, 0, sizeof(attr));
1443 if (pmu->perf_event_attr_init_default)
1444 pmu->perf_event_attr_init_default(pmu, &attr);
1445
1446 attr.type = pmu->type;
1447
1448 if (!const_parsed_terms || list_empty(&const_parsed_terms->terms)) {
1449 evsel = __add_event(list, &parse_state->idx, &attr,
1450 /*init_attr=*/true, /*name=*/NULL,
1451 /*metric_id=*/NULL, pmu,
1452 /*config_terms=*/NULL, auto_merge_stats,
1453 /*cpu_list=*/NULL, alternate_hw_config);
1454 return evsel ? 0 : -ENOMEM;
1455 }
1456
1457 parse_events_terms__init(&parsed_terms);
1458 if (const_parsed_terms) {
1459 int ret = parse_events_terms__copy(const_parsed_terms, &parsed_terms);
1460
1461 if (ret)
1462 return ret;
1463 }
1464 fix_raw(&parsed_terms, pmu);
1465
1466 /* Configure attr/terms with a known PMU, this will set hardcoded terms. */
1467 if (config_attr(&attr, &parsed_terms, parse_state->error, config_term_pmu)) {
1468 parse_events_terms__exit(&parsed_terms);
1469 return -EINVAL;
1470 }
1471
1472 /* Look for event names in the terms and rewrite into format based terms. */
1473 if (perf_pmu__check_alias(pmu, &parsed_terms,
1474 &info, &alias_rewrote_terms,
1475 &alternate_hw_config, err)) {
1476 parse_events_terms__exit(&parsed_terms);
1477 return -EINVAL;
1478 }
1479
1480 if (verbose > 1) {
1481 struct strbuf sb;
1482
1483 strbuf_init(&sb, /*hint=*/ 0);
1484 parse_events_terms__to_strbuf(&parsed_terms, &sb);
1485 fprintf(stderr, "..after resolving event: %s/%s/\n", pmu->name, sb.buf);
1486 strbuf_release(&sb);
1487 }
1488
1489 /* Configure attr/terms again if an alias was expanded. */
1490 if (alias_rewrote_terms &&
1491 config_attr(&attr, &parsed_terms, parse_state->error, config_term_pmu)) {
1492 parse_events_terms__exit(&parsed_terms);
1493 return -EINVAL;
1494 }
1495
1496 if (get_config_terms(&parsed_terms, &config_terms)) {
1497 parse_events_terms__exit(&parsed_terms);
1498 return -ENOMEM;
1499 }
1500
1501 /*
1502 * When using default config, record which bits of attr->config were
1503 * changed by the user.
1504 */
1505 if (pmu->perf_event_attr_init_default &&
1506 get_config_chgs(pmu, &parsed_terms, &config_terms)) {
1507 parse_events_terms__exit(&parsed_terms);
1508 return -ENOMEM;
1509 }
1510
1511 /* Skip configuring hard coded terms that were applied by config_attr. */
1512 if (perf_pmu__config(pmu, &attr, &parsed_terms, /*apply_hardcoded=*/false,
1513 parse_state->error)) {
1514 free_config_terms(&config_terms);
1515 parse_events_terms__exit(&parsed_terms);
1516 return -EINVAL;
1517 }
1518
1519 evsel = __add_event(list, &parse_state->idx, &attr, /*init_attr=*/true,
1520 get_config_name(&parsed_terms),
1521 get_config_metric_id(&parsed_terms), pmu,
1522 &config_terms, auto_merge_stats, /*cpu_list=*/NULL,
1523 alternate_hw_config);
1524 if (!evsel) {
1525 parse_events_terms__exit(&parsed_terms);
1526 return -ENOMEM;
1527 }
1528
1529 if (evsel->name)
1530 evsel->use_config_name = true;
1531
1532 evsel->percore = config_term_percore(&evsel->config_terms);
1533
1534 parse_events_terms__exit(&parsed_terms);
1535 free((char *)evsel->unit);
1536 evsel->unit = strdup(info.unit);
1537 evsel->scale = info.scale;
1538 evsel->per_pkg = info.per_pkg;
1539 evsel->snapshot = info.snapshot;
1540 return 0;
1541}
1542
1543int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1544 const char *event_name, u64 hw_config,
1545 const struct parse_events_terms *const_parsed_terms,
1546 struct list_head **listp, void *loc_)
1547{
1548 struct parse_events_term *term;
1549 struct list_head *list = NULL;
1550 struct perf_pmu *pmu = NULL;
1551 YYLTYPE *loc = loc_;
1552 int ok = 0;
1553 const char *config;
1554 struct parse_events_terms parsed_terms;
1555
1556 *listp = NULL;
1557
1558 parse_events_terms__init(&parsed_terms);
1559 if (const_parsed_terms) {
1560 int ret = parse_events_terms__copy(const_parsed_terms, &parsed_terms);
1561
1562 if (ret)
1563 return ret;
1564 }
1565
1566 config = strdup(event_name);
1567 if (!config)
1568 goto out_err;
1569
1570 if (parse_events_term__num(&term,
1571 PARSE_EVENTS__TERM_TYPE_USER,
1572 config, /*num=*/1, /*novalue=*/true,
1573 loc, /*loc_val=*/NULL) < 0) {
1574 zfree(&config);
1575 goto out_err;
1576 }
1577 list_add_tail(&term->list, &parsed_terms.terms);
1578
1579 /* Add it for all PMUs that support the alias */
1580 list = malloc(sizeof(struct list_head));
1581 if (!list)
1582 goto out_err;
1583
1584 INIT_LIST_HEAD(list);
1585
1586 while ((pmu = perf_pmus__scan(pmu)) != NULL) {
1587 bool auto_merge_stats;
1588
1589 if (parse_events__filter_pmu(parse_state, pmu))
1590 continue;
1591
1592 if (!perf_pmu__have_event(pmu, event_name))
1593 continue;
1594
1595 auto_merge_stats = perf_pmu__auto_merge_stats(pmu);
1596 if (!parse_events_add_pmu(parse_state, list, pmu,
1597 &parsed_terms, auto_merge_stats, hw_config)) {
1598 struct strbuf sb;
1599
1600 strbuf_init(&sb, /*hint=*/ 0);
1601 parse_events_terms__to_strbuf(&parsed_terms, &sb);
1602 pr_debug("%s -> %s/%s/\n", event_name, pmu->name, sb.buf);
1603 strbuf_release(&sb);
1604 ok++;
1605 }
1606 }
1607
1608 if (parse_state->fake_pmu) {
1609 if (!parse_events_add_pmu(parse_state, list, perf_pmus__fake_pmu(), &parsed_terms,
1610 /*auto_merge_stats=*/true, hw_config)) {
1611 struct strbuf sb;
1612
1613 strbuf_init(&sb, /*hint=*/ 0);
1614 parse_events_terms__to_strbuf(&parsed_terms, &sb);
1615 pr_debug("%s -> fake/%s/\n", event_name, sb.buf);
1616 strbuf_release(&sb);
1617 ok++;
1618 }
1619 }
1620
1621out_err:
1622 parse_events_terms__exit(&parsed_terms);
1623 if (ok)
1624 *listp = list;
1625 else
1626 free(list);
1627
1628 return ok ? 0 : -1;
1629}
1630
1631int parse_events_multi_pmu_add_or_add_pmu(struct parse_events_state *parse_state,
1632 const char *event_or_pmu,
1633 const struct parse_events_terms *const_parsed_terms,
1634 struct list_head **listp,
1635 void *loc_)
1636{
1637 YYLTYPE *loc = loc_;
1638 struct perf_pmu *pmu;
1639 int ok = 0;
1640 char *help;
1641
1642 *listp = malloc(sizeof(**listp));
1643 if (!*listp)
1644 return -ENOMEM;
1645
1646 INIT_LIST_HEAD(*listp);
1647
1648 /* Attempt to add to list assuming event_or_pmu is a PMU name. */
1649 pmu = perf_pmus__find(event_or_pmu);
1650 if (pmu && !parse_events_add_pmu(parse_state, *listp, pmu, const_parsed_terms,
1651 /*auto_merge_stats=*/false,
1652 /*alternate_hw_config=*/PERF_COUNT_HW_MAX))
1653 return 0;
1654
1655 if (parse_state->fake_pmu) {
1656 if (!parse_events_add_pmu(parse_state, *listp, perf_pmus__fake_pmu(),
1657 const_parsed_terms,
1658 /*auto_merge_stats=*/false,
1659 /*alternate_hw_config=*/PERF_COUNT_HW_MAX))
1660 return 0;
1661 }
1662
1663 pmu = NULL;
1664 /* Failed to add, try wildcard expansion of event_or_pmu as a PMU name. */
1665 while ((pmu = perf_pmus__scan(pmu)) != NULL) {
1666 if (!parse_events__filter_pmu(parse_state, pmu) &&
1667 perf_pmu__match(pmu, event_or_pmu)) {
1668 bool auto_merge_stats = perf_pmu__auto_merge_stats(pmu);
1669
1670 if (!parse_events_add_pmu(parse_state, *listp, pmu,
1671 const_parsed_terms,
1672 auto_merge_stats,
1673 /*alternate_hw_config=*/PERF_COUNT_HW_MAX)) {
1674 ok++;
1675 parse_state->wild_card_pmus = true;
1676 }
1677 }
1678 }
1679 if (ok)
1680 return 0;
1681
1682 /* Failure to add, assume event_or_pmu is an event name. */
1683 zfree(listp);
1684 if (!parse_events_multi_pmu_add(parse_state, event_or_pmu, PERF_COUNT_HW_MAX,
1685 const_parsed_terms, listp, loc))
1686 return 0;
1687
1688 if (asprintf(&help, "Unable to find PMU or event on a PMU of '%s'", event_or_pmu) < 0)
1689 help = NULL;
1690 parse_events_error__handle(parse_state->error, loc->first_column,
1691 strdup("Bad event or PMU"),
1692 help);
1693 zfree(listp);
1694 return -EINVAL;
1695}
1696
1697void parse_events__set_leader(char *name, struct list_head *list)
1698{
1699 struct evsel *leader;
1700
1701 if (list_empty(list)) {
1702 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1703 return;
1704 }
1705
1706 leader = list_first_entry(list, struct evsel, core.node);
1707 __perf_evlist__set_leader(list, &leader->core);
1708 zfree(&leader->group_name);
1709 leader->group_name = name;
1710}
1711
1712static int parse_events__modifier_list(struct parse_events_state *parse_state,
1713 YYLTYPE *loc,
1714 struct list_head *list,
1715 struct parse_events_modifier mod,
1716 bool group)
1717{
1718 struct evsel *evsel;
1719
1720 if (!group && mod.weak) {
1721 parse_events_error__handle(parse_state->error, loc->first_column,
1722 strdup("Weak modifier is for use with groups"), NULL);
1723 return -EINVAL;
1724 }
1725
1726 __evlist__for_each_entry(list, evsel) {
1727 /* Translate modifiers into the equivalent evsel excludes. */
1728 int eu = group ? evsel->core.attr.exclude_user : 0;
1729 int ek = group ? evsel->core.attr.exclude_kernel : 0;
1730 int eh = group ? evsel->core.attr.exclude_hv : 0;
1731 int eH = group ? evsel->core.attr.exclude_host : 0;
1732 int eG = group ? evsel->core.attr.exclude_guest : 0;
1733 int exclude = eu | ek | eh;
1734 int exclude_GH = group ? evsel->exclude_GH : 0;
1735
1736 if (mod.user) {
1737 if (!exclude)
1738 exclude = eu = ek = eh = 1;
1739 if (!exclude_GH && !perf_guest && exclude_GH_default)
1740 eG = 1;
1741 eu = 0;
1742 }
1743 if (mod.kernel) {
1744 if (!exclude)
1745 exclude = eu = ek = eh = 1;
1746 ek = 0;
1747 }
1748 if (mod.hypervisor) {
1749 if (!exclude)
1750 exclude = eu = ek = eh = 1;
1751 eh = 0;
1752 }
1753 if (mod.guest) {
1754 if (!exclude_GH)
1755 exclude_GH = eG = eH = 1;
1756 eG = 0;
1757 }
1758 if (mod.host) {
1759 if (!exclude_GH)
1760 exclude_GH = eG = eH = 1;
1761 eH = 0;
1762 }
1763 evsel->core.attr.exclude_user = eu;
1764 evsel->core.attr.exclude_kernel = ek;
1765 evsel->core.attr.exclude_hv = eh;
1766 evsel->core.attr.exclude_host = eH;
1767 evsel->core.attr.exclude_guest = eG;
1768 evsel->exclude_GH = exclude_GH;
1769
1770 /* Simple modifiers copied to the evsel. */
1771 if (mod.precise) {
1772 u8 precise = evsel->core.attr.precise_ip + mod.precise;
1773 /*
1774 * precise ip:
1775 *
1776 * 0 - SAMPLE_IP can have arbitrary skid
1777 * 1 - SAMPLE_IP must have constant skid
1778 * 2 - SAMPLE_IP requested to have 0 skid
1779 * 3 - SAMPLE_IP must have 0 skid
1780 *
1781 * See also PERF_RECORD_MISC_EXACT_IP
1782 */
1783 if (precise > 3) {
1784 char *help;
1785
1786 if (asprintf(&help,
1787 "Maximum combined precise value is 3, adding precision to \"%s\"",
1788 evsel__name(evsel)) > 0) {
1789 parse_events_error__handle(parse_state->error,
1790 loc->first_column,
1791 help, NULL);
1792 }
1793 return -EINVAL;
1794 }
1795 evsel->core.attr.precise_ip = precise;
1796 }
1797 if (mod.precise_max)
1798 evsel->precise_max = 1;
1799 if (mod.non_idle)
1800 evsel->core.attr.exclude_idle = 1;
1801 if (mod.sample_read)
1802 evsel->sample_read = 1;
1803 if (mod.pinned && evsel__is_group_leader(evsel))
1804 evsel->core.attr.pinned = 1;
1805 if (mod.exclusive && evsel__is_group_leader(evsel))
1806 evsel->core.attr.exclusive = 1;
1807 if (mod.weak)
1808 evsel->weak_group = true;
1809 if (mod.bpf)
1810 evsel->bpf_counter = true;
1811 if (mod.retire_lat)
1812 evsel->retire_lat = true;
1813 }
1814 return 0;
1815}
1816
1817int parse_events__modifier_group(struct parse_events_state *parse_state, void *loc,
1818 struct list_head *list,
1819 struct parse_events_modifier mod)
1820{
1821 return parse_events__modifier_list(parse_state, loc, list, mod, /*group=*/true);
1822}
1823
1824int parse_events__modifier_event(struct parse_events_state *parse_state, void *loc,
1825 struct list_head *list,
1826 struct parse_events_modifier mod)
1827{
1828 return parse_events__modifier_list(parse_state, loc, list, mod, /*group=*/false);
1829}
1830
1831int parse_events__set_default_name(struct list_head *list, char *name)
1832{
1833 struct evsel *evsel;
1834 bool used_name = false;
1835
1836 __evlist__for_each_entry(list, evsel) {
1837 if (!evsel->name) {
1838 evsel->name = used_name ? strdup(name) : name;
1839 used_name = true;
1840 if (!evsel->name)
1841 return -ENOMEM;
1842 }
1843 }
1844 if (!used_name)
1845 free(name);
1846 return 0;
1847}
1848
1849static int parse_events__scanner(const char *str,
1850 FILE *input,
1851 struct parse_events_state *parse_state)
1852{
1853 YY_BUFFER_STATE buffer;
1854 void *scanner;
1855 int ret;
1856
1857 ret = parse_events_lex_init_extra(parse_state, &scanner);
1858 if (ret)
1859 return ret;
1860
1861 if (str)
1862 buffer = parse_events__scan_string(str, scanner);
1863 else
1864 parse_events_set_in(input, scanner);
1865
1866#ifdef PARSER_DEBUG
1867 parse_events_debug = 1;
1868 parse_events_set_debug(1, scanner);
1869#endif
1870 ret = parse_events_parse(parse_state, scanner);
1871
1872 if (str) {
1873 parse_events__flush_buffer(buffer, scanner);
1874 parse_events__delete_buffer(buffer, scanner);
1875 }
1876 parse_events_lex_destroy(scanner);
1877 return ret;
1878}
1879
1880/*
1881 * parse event config string, return a list of event terms.
1882 */
1883int parse_events_terms(struct parse_events_terms *terms, const char *str, FILE *input)
1884{
1885 struct parse_events_state parse_state = {
1886 .terms = NULL,
1887 .stoken = PE_START_TERMS,
1888 };
1889 int ret;
1890
1891 ret = parse_events__scanner(str, input, &parse_state);
1892 if (!ret)
1893 list_splice(&parse_state.terms->terms, &terms->terms);
1894
1895 zfree(&parse_state.terms);
1896 return ret;
1897}
1898
1899static int evsel__compute_group_pmu_name(struct evsel *evsel,
1900 const struct list_head *head)
1901{
1902 struct evsel *leader = evsel__leader(evsel);
1903 struct evsel *pos;
1904 const char *group_pmu_name;
1905 struct perf_pmu *pmu = evsel__find_pmu(evsel);
1906
1907 if (!pmu) {
1908 /*
1909 * For PERF_TYPE_HARDWARE and PERF_TYPE_HW_CACHE types the PMU
1910 * is a core PMU, but in heterogeneous systems this is
1911 * unknown. For now pick the first core PMU.
1912 */
1913 pmu = perf_pmus__scan_core(NULL);
1914 }
1915 if (!pmu) {
1916 pr_debug("No PMU found for '%s'\n", evsel__name(evsel));
1917 return -EINVAL;
1918 }
1919 group_pmu_name = pmu->name;
1920 /*
1921 * Software events may be in a group with other uncore PMU events. Use
1922 * the pmu_name of the first non-software event to avoid breaking the
1923 * software event out of the group.
1924 *
1925 * Aux event leaders, like intel_pt, expect a group with events from
1926 * other PMUs, so substitute the AUX event's PMU in this case.
1927 */
1928 if (perf_pmu__is_software(pmu) || evsel__is_aux_event(leader)) {
1929 struct perf_pmu *leader_pmu = evsel__find_pmu(leader);
1930
1931 if (!leader_pmu) {
1932 /* As with determining pmu above. */
1933 leader_pmu = perf_pmus__scan_core(NULL);
1934 }
1935 /*
1936 * Starting with the leader, find the first event with a named
1937 * non-software PMU. for_each_group_(member|evsel) isn't used as
1938 * the list isn't yet sorted putting evsel's in the same group
1939 * together.
1940 */
1941 if (leader_pmu && !perf_pmu__is_software(leader_pmu)) {
1942 group_pmu_name = leader_pmu->name;
1943 } else if (leader->core.nr_members > 1) {
1944 list_for_each_entry(pos, head, core.node) {
1945 struct perf_pmu *pos_pmu;
1946
1947 if (pos == leader || evsel__leader(pos) != leader)
1948 continue;
1949 pos_pmu = evsel__find_pmu(pos);
1950 if (!pos_pmu) {
1951 /* As with determining pmu above. */
1952 pos_pmu = perf_pmus__scan_core(NULL);
1953 }
1954 if (pos_pmu && !perf_pmu__is_software(pos_pmu)) {
1955 group_pmu_name = pos_pmu->name;
1956 break;
1957 }
1958 }
1959 }
1960 }
1961 /* Record computed name. */
1962 evsel->group_pmu_name = strdup(group_pmu_name);
1963 return evsel->group_pmu_name ? 0 : -ENOMEM;
1964}
1965
1966__weak int arch_evlist__cmp(const struct evsel *lhs, const struct evsel *rhs)
1967{
1968 /* Order by insertion index. */
1969 return lhs->core.idx - rhs->core.idx;
1970}
1971
1972static int evlist__cmp(void *_fg_idx, const struct list_head *l, const struct list_head *r)
1973{
1974 const struct perf_evsel *lhs_core = container_of(l, struct perf_evsel, node);
1975 const struct evsel *lhs = container_of(lhs_core, struct evsel, core);
1976 const struct perf_evsel *rhs_core = container_of(r, struct perf_evsel, node);
1977 const struct evsel *rhs = container_of(rhs_core, struct evsel, core);
1978 int *force_grouped_idx = _fg_idx;
1979 int lhs_sort_idx, rhs_sort_idx, ret;
1980 const char *lhs_pmu_name, *rhs_pmu_name;
1981 bool lhs_has_group, rhs_has_group;
1982
1983 /*
1984 * First sort by grouping/leader. Read the leader idx only if the evsel
1985 * is part of a group, by default ungrouped events will be sorted
1986 * relative to grouped events based on where the first ungrouped event
1987 * occurs. If both events don't have a group we want to fall-through to
1988 * the arch specific sorting, that can reorder and fix things like
1989 * Intel's topdown events.
1990 */
1991 if (lhs_core->leader != lhs_core || lhs_core->nr_members > 1) {
1992 lhs_has_group = true;
1993 lhs_sort_idx = lhs_core->leader->idx;
1994 } else {
1995 lhs_has_group = false;
1996 lhs_sort_idx = *force_grouped_idx != -1 && arch_evsel__must_be_in_group(lhs)
1997 ? *force_grouped_idx
1998 : lhs_core->idx;
1999 }
2000 if (rhs_core->leader != rhs_core || rhs_core->nr_members > 1) {
2001 rhs_has_group = true;
2002 rhs_sort_idx = rhs_core->leader->idx;
2003 } else {
2004 rhs_has_group = false;
2005 rhs_sort_idx = *force_grouped_idx != -1 && arch_evsel__must_be_in_group(rhs)
2006 ? *force_grouped_idx
2007 : rhs_core->idx;
2008 }
2009
2010 if (lhs_sort_idx != rhs_sort_idx)
2011 return lhs_sort_idx - rhs_sort_idx;
2012
2013 /* Group by PMU if there is a group. Groups can't span PMUs. */
2014 if (lhs_has_group && rhs_has_group) {
2015 lhs_pmu_name = lhs->group_pmu_name;
2016 rhs_pmu_name = rhs->group_pmu_name;
2017 ret = strcmp(lhs_pmu_name, rhs_pmu_name);
2018 if (ret)
2019 return ret;
2020 }
2021
2022 /* Architecture specific sorting. */
2023 return arch_evlist__cmp(lhs, rhs);
2024}
2025
2026static int parse_events__sort_events_and_fix_groups(struct list_head *list)
2027{
2028 int idx = 0, force_grouped_idx = -1;
2029 struct evsel *pos, *cur_leader = NULL;
2030 struct perf_evsel *cur_leaders_grp = NULL;
2031 bool idx_changed = false, cur_leader_force_grouped = false;
2032 int orig_num_leaders = 0, num_leaders = 0;
2033 int ret;
2034
2035 /*
2036 * Compute index to insert ungrouped events at. Place them where the
2037 * first ungrouped event appears.
2038 */
2039 list_for_each_entry(pos, list, core.node) {
2040 const struct evsel *pos_leader = evsel__leader(pos);
2041
2042 ret = evsel__compute_group_pmu_name(pos, list);
2043 if (ret)
2044 return ret;
2045
2046 if (pos == pos_leader)
2047 orig_num_leaders++;
2048
2049 /*
2050 * Ensure indexes are sequential, in particular for multiple
2051 * event lists being merged. The indexes are used to detect when
2052 * the user order is modified.
2053 */
2054 pos->core.idx = idx++;
2055
2056 /* Remember an index to sort all forced grouped events together to. */
2057 if (force_grouped_idx == -1 && pos == pos_leader && pos->core.nr_members < 2 &&
2058 arch_evsel__must_be_in_group(pos))
2059 force_grouped_idx = pos->core.idx;
2060 }
2061
2062 /* Sort events. */
2063 list_sort(&force_grouped_idx, list, evlist__cmp);
2064
2065 /*
2066 * Recompute groups, splitting for PMUs and adding groups for events
2067 * that require them.
2068 */
2069 idx = 0;
2070 list_for_each_entry(pos, list, core.node) {
2071 const struct evsel *pos_leader = evsel__leader(pos);
2072 const char *pos_pmu_name = pos->group_pmu_name;
2073 const char *cur_leader_pmu_name;
2074 bool pos_force_grouped = force_grouped_idx != -1 &&
2075 arch_evsel__must_be_in_group(pos);
2076
2077 /* Reset index and nr_members. */
2078 if (pos->core.idx != idx)
2079 idx_changed = true;
2080 pos->core.idx = idx++;
2081 pos->core.nr_members = 0;
2082
2083 /*
2084 * Set the group leader respecting the given groupings and that
2085 * groups can't span PMUs.
2086 */
2087 if (!cur_leader)
2088 cur_leader = pos;
2089
2090 cur_leader_pmu_name = cur_leader->group_pmu_name;
2091 if ((cur_leaders_grp != pos->core.leader &&
2092 (!pos_force_grouped || !cur_leader_force_grouped)) ||
2093 strcmp(cur_leader_pmu_name, pos_pmu_name)) {
2094 /* Event is for a different group/PMU than last. */
2095 cur_leader = pos;
2096 /*
2097 * Remember the leader's group before it is overwritten,
2098 * so that later events match as being in the same
2099 * group.
2100 */
2101 cur_leaders_grp = pos->core.leader;
2102 /*
2103 * Avoid forcing events into groups with events that
2104 * don't need to be in the group.
2105 */
2106 cur_leader_force_grouped = pos_force_grouped;
2107 }
2108 if (pos_leader != cur_leader) {
2109 /* The leader changed so update it. */
2110 evsel__set_leader(pos, cur_leader);
2111 }
2112 }
2113 list_for_each_entry(pos, list, core.node) {
2114 struct evsel *pos_leader = evsel__leader(pos);
2115
2116 if (pos == pos_leader)
2117 num_leaders++;
2118 pos_leader->core.nr_members++;
2119 }
2120 return (idx_changed || num_leaders != orig_num_leaders) ? 1 : 0;
2121}
2122
2123int __parse_events(struct evlist *evlist, const char *str, const char *pmu_filter,
2124 struct parse_events_error *err, bool fake_pmu,
2125 bool warn_if_reordered, bool fake_tp)
2126{
2127 struct parse_events_state parse_state = {
2128 .list = LIST_HEAD_INIT(parse_state.list),
2129 .idx = evlist->core.nr_entries,
2130 .error = err,
2131 .stoken = PE_START_EVENTS,
2132 .fake_pmu = fake_pmu,
2133 .fake_tp = fake_tp,
2134 .pmu_filter = pmu_filter,
2135 .match_legacy_cache_terms = true,
2136 };
2137 int ret, ret2;
2138
2139 ret = parse_events__scanner(str, /*input=*/ NULL, &parse_state);
2140
2141 if (!ret && list_empty(&parse_state.list)) {
2142 WARN_ONCE(true, "WARNING: event parser found nothing\n");
2143 return -1;
2144 }
2145
2146 ret2 = parse_events__sort_events_and_fix_groups(&parse_state.list);
2147 if (ret2 < 0)
2148 return ret;
2149
2150 if (ret2 && warn_if_reordered && !parse_state.wild_card_pmus)
2151 pr_warning("WARNING: events were regrouped to match PMUs\n");
2152
2153 /*
2154 * Add list to the evlist even with errors to allow callers to clean up.
2155 */
2156 evlist__splice_list_tail(evlist, &parse_state.list);
2157
2158 if (!ret) {
2159 struct evsel *last;
2160
2161 last = evlist__last(evlist);
2162 last->cmdline_group_boundary = true;
2163
2164 return 0;
2165 }
2166
2167 /*
2168 * There are 2 users - builtin-record and builtin-test objects.
2169 * Both call evlist__delete in case of error, so we dont
2170 * need to bother.
2171 */
2172 return ret;
2173}
2174
2175int parse_event(struct evlist *evlist, const char *str)
2176{
2177 struct parse_events_error err;
2178 int ret;
2179
2180 parse_events_error__init(&err);
2181 ret = parse_events(evlist, str, &err);
2182 parse_events_error__exit(&err);
2183 return ret;
2184}
2185
2186struct parse_events_error_entry {
2187 /** @list: The list the error is part of. */
2188 struct list_head list;
2189 /** @idx: index in the parsed string */
2190 int idx;
2191 /** @str: string to display at the index */
2192 char *str;
2193 /** @help: optional help string */
2194 char *help;
2195};
2196
2197void parse_events_error__init(struct parse_events_error *err)
2198{
2199 INIT_LIST_HEAD(&err->list);
2200}
2201
2202void parse_events_error__exit(struct parse_events_error *err)
2203{
2204 struct parse_events_error_entry *pos, *tmp;
2205
2206 list_for_each_entry_safe(pos, tmp, &err->list, list) {
2207 zfree(&pos->str);
2208 zfree(&pos->help);
2209 list_del_init(&pos->list);
2210 free(pos);
2211 }
2212}
2213
2214void parse_events_error__handle(struct parse_events_error *err, int idx,
2215 char *str, char *help)
2216{
2217 struct parse_events_error_entry *entry;
2218
2219 if (WARN(!str || !err, "WARNING: failed to provide error string or struct\n"))
2220 goto out_free;
2221
2222 entry = zalloc(sizeof(*entry));
2223 if (!entry) {
2224 pr_err("Failed to allocate memory for event parsing error: %s (%s)\n",
2225 str, help ?: "<no help>");
2226 goto out_free;
2227 }
2228 entry->idx = idx;
2229 entry->str = str;
2230 entry->help = help;
2231 list_add(&entry->list, &err->list);
2232 return;
2233out_free:
2234 free(str);
2235 free(help);
2236}
2237
2238#define MAX_WIDTH 1000
2239static int get_term_width(void)
2240{
2241 struct winsize ws;
2242
2243 get_term_dimensions(&ws);
2244 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2245}
2246
2247static void __parse_events_error__print(int err_idx, const char *err_str,
2248 const char *err_help, const char *event)
2249{
2250 const char *str = "invalid or unsupported event: ";
2251 char _buf[MAX_WIDTH];
2252 char *buf = (char *) event;
2253 int idx = 0;
2254 if (err_str) {
2255 /* -2 for extra '' in the final fprintf */
2256 int width = get_term_width() - 2;
2257 int len_event = strlen(event);
2258 int len_str, max_len, cut = 0;
2259
2260 /*
2261 * Maximum error index indent, we will cut
2262 * the event string if it's bigger.
2263 */
2264 int max_err_idx = 13;
2265
2266 /*
2267 * Let's be specific with the message when
2268 * we have the precise error.
2269 */
2270 str = "event syntax error: ";
2271 len_str = strlen(str);
2272 max_len = width - len_str;
2273
2274 buf = _buf;
2275
2276 /* We're cutting from the beginning. */
2277 if (err_idx > max_err_idx)
2278 cut = err_idx - max_err_idx;
2279
2280 strncpy(buf, event + cut, max_len);
2281
2282 /* Mark cut parts with '..' on both sides. */
2283 if (cut)
2284 buf[0] = buf[1] = '.';
2285
2286 if ((len_event - cut) > max_len) {
2287 buf[max_len - 1] = buf[max_len - 2] = '.';
2288 buf[max_len] = 0;
2289 }
2290
2291 idx = len_str + err_idx - cut;
2292 }
2293
2294 fprintf(stderr, "%s'%s'\n", str, buf);
2295 if (idx) {
2296 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2297 if (err_help)
2298 fprintf(stderr, "\n%s\n", err_help);
2299 }
2300}
2301
2302void parse_events_error__print(const struct parse_events_error *err,
2303 const char *event)
2304{
2305 struct parse_events_error_entry *pos;
2306 bool first = true;
2307
2308 list_for_each_entry(pos, &err->list, list) {
2309 if (!first)
2310 fputs("\n", stderr);
2311 __parse_events_error__print(pos->idx, pos->str, pos->help, event);
2312 first = false;
2313 }
2314}
2315
2316/*
2317 * In the list of errors err, do any of the error strings (str) contain the
2318 * given needle string?
2319 */
2320bool parse_events_error__contains(const struct parse_events_error *err,
2321 const char *needle)
2322{
2323 struct parse_events_error_entry *pos;
2324
2325 list_for_each_entry(pos, &err->list, list) {
2326 if (strstr(pos->str, needle) != NULL)
2327 return true;
2328 }
2329 return false;
2330}
2331
2332#undef MAX_WIDTH
2333
2334int parse_events_option(const struct option *opt, const char *str,
2335 int unset __maybe_unused)
2336{
2337 struct parse_events_option_args *args = opt->value;
2338 struct parse_events_error err;
2339 int ret;
2340
2341 parse_events_error__init(&err);
2342 ret = __parse_events(*args->evlistp, str, args->pmu_filter, &err,
2343 /*fake_pmu=*/false, /*warn_if_reordered=*/true,
2344 /*fake_tp=*/false);
2345
2346 if (ret) {
2347 parse_events_error__print(&err, str);
2348 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2349 }
2350 parse_events_error__exit(&err);
2351
2352 return ret;
2353}
2354
2355int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2356{
2357 struct parse_events_option_args *args = opt->value;
2358 int ret;
2359
2360 if (*args->evlistp == NULL) {
2361 *args->evlistp = evlist__new();
2362
2363 if (*args->evlistp == NULL) {
2364 fprintf(stderr, "Not enough memory to create evlist\n");
2365 return -1;
2366 }
2367 }
2368 ret = parse_events_option(opt, str, unset);
2369 if (ret) {
2370 evlist__delete(*args->evlistp);
2371 *args->evlistp = NULL;
2372 }
2373
2374 return ret;
2375}
2376
2377static int
2378foreach_evsel_in_last_glob(struct evlist *evlist,
2379 int (*func)(struct evsel *evsel,
2380 const void *arg),
2381 const void *arg)
2382{
2383 struct evsel *last = NULL;
2384 int err;
2385
2386 /*
2387 * Don't return when list_empty, give func a chance to report
2388 * error when it found last == NULL.
2389 *
2390 * So no need to WARN here, let *func do this.
2391 */
2392 if (evlist->core.nr_entries > 0)
2393 last = evlist__last(evlist);
2394
2395 do {
2396 err = (*func)(last, arg);
2397 if (err)
2398 return -1;
2399 if (!last)
2400 return 0;
2401
2402 if (last->core.node.prev == &evlist->core.entries)
2403 return 0;
2404 last = list_entry(last->core.node.prev, struct evsel, core.node);
2405 } while (!last->cmdline_group_boundary);
2406
2407 return 0;
2408}
2409
2410static int set_filter(struct evsel *evsel, const void *arg)
2411{
2412 const char *str = arg;
2413 bool found = false;
2414 int nr_addr_filters = 0;
2415 struct perf_pmu *pmu = NULL;
2416
2417 if (evsel == NULL) {
2418 fprintf(stderr,
2419 "--filter option should follow a -e tracepoint or HW tracer option\n");
2420 return -1;
2421 }
2422
2423 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2424 if (evsel__append_tp_filter(evsel, str) < 0) {
2425 fprintf(stderr,
2426 "not enough memory to hold filter string\n");
2427 return -1;
2428 }
2429
2430 return 0;
2431 }
2432
2433 while ((pmu = perf_pmus__scan(pmu)) != NULL)
2434 if (pmu->type == evsel->core.attr.type) {
2435 found = true;
2436 break;
2437 }
2438
2439 if (found)
2440 perf_pmu__scan_file(pmu, "nr_addr_filters",
2441 "%d", &nr_addr_filters);
2442
2443 if (!nr_addr_filters)
2444 return perf_bpf_filter__parse(&evsel->bpf_filters, str);
2445
2446 if (evsel__append_addr_filter(evsel, str) < 0) {
2447 fprintf(stderr,
2448 "not enough memory to hold filter string\n");
2449 return -1;
2450 }
2451
2452 return 0;
2453}
2454
2455int parse_filter(const struct option *opt, const char *str,
2456 int unset __maybe_unused)
2457{
2458 struct evlist *evlist = *(struct evlist **)opt->value;
2459
2460 return foreach_evsel_in_last_glob(evlist, set_filter,
2461 (const void *)str);
2462}
2463
2464static int add_exclude_perf_filter(struct evsel *evsel,
2465 const void *arg __maybe_unused)
2466{
2467 char new_filter[64];
2468
2469 if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2470 fprintf(stderr,
2471 "--exclude-perf option should follow a -e tracepoint option\n");
2472 return -1;
2473 }
2474
2475 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2476
2477 if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2478 fprintf(stderr,
2479 "not enough memory to hold filter string\n");
2480 return -1;
2481 }
2482
2483 return 0;
2484}
2485
2486int exclude_perf(const struct option *opt,
2487 const char *arg __maybe_unused,
2488 int unset __maybe_unused)
2489{
2490 struct evlist *evlist = *(struct evlist **)opt->value;
2491
2492 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2493 NULL);
2494}
2495
2496int parse_events__is_hardcoded_term(struct parse_events_term *term)
2497{
2498 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2499}
2500
2501static int new_term(struct parse_events_term **_term,
2502 struct parse_events_term *temp,
2503 char *str, u64 num)
2504{
2505 struct parse_events_term *term;
2506
2507 term = malloc(sizeof(*term));
2508 if (!term)
2509 return -ENOMEM;
2510
2511 *term = *temp;
2512 INIT_LIST_HEAD(&term->list);
2513 term->weak = false;
2514
2515 switch (term->type_val) {
2516 case PARSE_EVENTS__TERM_TYPE_NUM:
2517 term->val.num = num;
2518 break;
2519 case PARSE_EVENTS__TERM_TYPE_STR:
2520 term->val.str = str;
2521 break;
2522 default:
2523 free(term);
2524 return -EINVAL;
2525 }
2526
2527 *_term = term;
2528 return 0;
2529}
2530
2531int parse_events_term__num(struct parse_events_term **term,
2532 enum parse_events__term_type type_term,
2533 const char *config, u64 num,
2534 bool no_value,
2535 void *loc_term_, void *loc_val_)
2536{
2537 YYLTYPE *loc_term = loc_term_;
2538 YYLTYPE *loc_val = loc_val_;
2539
2540 struct parse_events_term temp = {
2541 .type_val = PARSE_EVENTS__TERM_TYPE_NUM,
2542 .type_term = type_term,
2543 .config = config ? : strdup(parse_events__term_type_str(type_term)),
2544 .no_value = no_value,
2545 .err_term = loc_term ? loc_term->first_column : 0,
2546 .err_val = loc_val ? loc_val->first_column : 0,
2547 };
2548
2549 return new_term(term, &temp, /*str=*/NULL, num);
2550}
2551
2552int parse_events_term__str(struct parse_events_term **term,
2553 enum parse_events__term_type type_term,
2554 char *config, char *str,
2555 void *loc_term_, void *loc_val_)
2556{
2557 YYLTYPE *loc_term = loc_term_;
2558 YYLTYPE *loc_val = loc_val_;
2559
2560 struct parse_events_term temp = {
2561 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
2562 .type_term = type_term,
2563 .config = config,
2564 .err_term = loc_term ? loc_term->first_column : 0,
2565 .err_val = loc_val ? loc_val->first_column : 0,
2566 };
2567
2568 return new_term(term, &temp, str, /*num=*/0);
2569}
2570
2571int parse_events_term__term(struct parse_events_term **term,
2572 enum parse_events__term_type term_lhs,
2573 enum parse_events__term_type term_rhs,
2574 void *loc_term, void *loc_val)
2575{
2576 return parse_events_term__str(term, term_lhs, NULL,
2577 strdup(parse_events__term_type_str(term_rhs)),
2578 loc_term, loc_val);
2579}
2580
2581int parse_events_term__clone(struct parse_events_term **new,
2582 const struct parse_events_term *term)
2583{
2584 char *str;
2585 struct parse_events_term temp = *term;
2586
2587 temp.used = false;
2588 if (term->config) {
2589 temp.config = strdup(term->config);
2590 if (!temp.config)
2591 return -ENOMEM;
2592 }
2593 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
2594 return new_term(new, &temp, /*str=*/NULL, term->val.num);
2595
2596 str = strdup(term->val.str);
2597 if (!str) {
2598 zfree(&temp.config);
2599 return -ENOMEM;
2600 }
2601 return new_term(new, &temp, str, /*num=*/0);
2602}
2603
2604void parse_events_term__delete(struct parse_events_term *term)
2605{
2606 if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
2607 zfree(&term->val.str);
2608
2609 zfree(&term->config);
2610 free(term);
2611}
2612
2613static int parse_events_terms__copy(const struct parse_events_terms *src,
2614 struct parse_events_terms *dest)
2615{
2616 struct parse_events_term *term;
2617
2618 list_for_each_entry (term, &src->terms, list) {
2619 struct parse_events_term *n;
2620 int ret;
2621
2622 ret = parse_events_term__clone(&n, term);
2623 if (ret)
2624 return ret;
2625
2626 list_add_tail(&n->list, &dest->terms);
2627 }
2628 return 0;
2629}
2630
2631void parse_events_terms__init(struct parse_events_terms *terms)
2632{
2633 INIT_LIST_HEAD(&terms->terms);
2634}
2635
2636void parse_events_terms__exit(struct parse_events_terms *terms)
2637{
2638 struct parse_events_term *term, *h;
2639
2640 list_for_each_entry_safe(term, h, &terms->terms, list) {
2641 list_del_init(&term->list);
2642 parse_events_term__delete(term);
2643 }
2644}
2645
2646void parse_events_terms__delete(struct parse_events_terms *terms)
2647{
2648 if (!terms)
2649 return;
2650 parse_events_terms__exit(terms);
2651 free(terms);
2652}
2653
2654int parse_events_terms__to_strbuf(const struct parse_events_terms *terms, struct strbuf *sb)
2655{
2656 struct parse_events_term *term;
2657 bool first = true;
2658
2659 if (!terms)
2660 return 0;
2661
2662 list_for_each_entry(term, &terms->terms, list) {
2663 int ret;
2664
2665 if (!first) {
2666 ret = strbuf_addch(sb, ',');
2667 if (ret < 0)
2668 return ret;
2669 }
2670 first = false;
2671
2672 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
2673 if (term->no_value) {
2674 assert(term->val.num == 1);
2675 ret = strbuf_addf(sb, "%s", term->config);
2676 } else
2677 ret = strbuf_addf(sb, "%s=%#"PRIx64, term->config, term->val.num);
2678 else if (term->type_val == PARSE_EVENTS__TERM_TYPE_STR) {
2679 if (term->config) {
2680 ret = strbuf_addf(sb, "%s=", term->config);
2681 if (ret < 0)
2682 return ret;
2683 } else if ((unsigned int)term->type_term < __PARSE_EVENTS__TERM_TYPE_NR) {
2684 ret = strbuf_addf(sb, "%s=",
2685 parse_events__term_type_str(term->type_term));
2686 if (ret < 0)
2687 return ret;
2688 }
2689 assert(!term->no_value);
2690 ret = strbuf_addf(sb, "%s", term->val.str);
2691 }
2692 if (ret < 0)
2693 return ret;
2694 }
2695 return 0;
2696}
2697
2698static void config_terms_list(char *buf, size_t buf_sz)
2699{
2700 int i;
2701 bool first = true;
2702
2703 buf[0] = '\0';
2704 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2705 const char *name = parse_events__term_type_str(i);
2706
2707 if (!config_term_avail(i, NULL))
2708 continue;
2709 if (!name)
2710 continue;
2711 if (name[0] == '<')
2712 continue;
2713
2714 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2715 return;
2716
2717 if (!first)
2718 strcat(buf, ",");
2719 else
2720 first = false;
2721 strcat(buf, name);
2722 }
2723}
2724
2725/*
2726 * Return string contains valid config terms of an event.
2727 * @additional_terms: For terms such as PMU sysfs terms.
2728 */
2729char *parse_events_formats_error_string(char *additional_terms)
2730{
2731 char *str;
2732 /* "no-overwrite" is the longest name */
2733 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2734 (sizeof("no-overwrite") - 1)];
2735
2736 config_terms_list(static_terms, sizeof(static_terms));
2737 /* valid terms */
2738 if (additional_terms) {
2739 if (asprintf(&str, "valid terms: %s,%s",
2740 additional_terms, static_terms) < 0)
2741 goto fail;
2742 } else {
2743 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2744 goto fail;
2745 }
2746 return str;
2747
2748fail:
2749 return NULL;
2750}
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/hw_breakpoint.h>
3#include <linux/err.h>
4#include <linux/zalloc.h>
5#include <dirent.h>
6#include <errno.h>
7#include <sys/ioctl.h>
8#include <sys/types.h>
9#include <sys/stat.h>
10#include <fcntl.h>
11#include <sys/param.h>
12#include "term.h"
13#include "build-id.h"
14#include "evlist.h"
15#include "evsel.h"
16#include <subcmd/pager.h>
17#include <subcmd/parse-options.h>
18#include "parse-events.h"
19#include <subcmd/exec-cmd.h>
20#include "string2.h"
21#include "strlist.h"
22#include "symbol.h"
23#include "header.h"
24#include "bpf-loader.h"
25#include "debug.h"
26#include <api/fs/tracing_path.h>
27#include <perf/cpumap.h>
28#include "parse-events-bison.h"
29#define YY_EXTRA_TYPE int
30#include "parse-events-flex.h"
31#include "pmu.h"
32#include "thread_map.h"
33#include "probe-file.h"
34#include "asm/bug.h"
35#include "util/parse-branch-options.h"
36#include "metricgroup.h"
37#include "util/evsel_config.h"
38#include "util/event.h"
39
40#define MAX_NAME_LEN 100
41
42#ifdef PARSER_DEBUG
43extern int parse_events_debug;
44#endif
45int parse_events_parse(void *parse_state, void *scanner);
46static int get_config_terms(struct list_head *head_config,
47 struct list_head *head_terms __maybe_unused);
48
49static struct perf_pmu_event_symbol *perf_pmu_events_list;
50/*
51 * The variable indicates the number of supported pmu event symbols.
52 * 0 means not initialized and ready to init
53 * -1 means failed to init, don't try anymore
54 * >0 is the number of supported pmu event symbols
55 */
56static int perf_pmu_events_list_num;
57
58struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
59 [PERF_COUNT_HW_CPU_CYCLES] = {
60 .symbol = "cpu-cycles",
61 .alias = "cycles",
62 },
63 [PERF_COUNT_HW_INSTRUCTIONS] = {
64 .symbol = "instructions",
65 .alias = "",
66 },
67 [PERF_COUNT_HW_CACHE_REFERENCES] = {
68 .symbol = "cache-references",
69 .alias = "",
70 },
71 [PERF_COUNT_HW_CACHE_MISSES] = {
72 .symbol = "cache-misses",
73 .alias = "",
74 },
75 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
76 .symbol = "branch-instructions",
77 .alias = "branches",
78 },
79 [PERF_COUNT_HW_BRANCH_MISSES] = {
80 .symbol = "branch-misses",
81 .alias = "",
82 },
83 [PERF_COUNT_HW_BUS_CYCLES] = {
84 .symbol = "bus-cycles",
85 .alias = "",
86 },
87 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
88 .symbol = "stalled-cycles-frontend",
89 .alias = "idle-cycles-frontend",
90 },
91 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
92 .symbol = "stalled-cycles-backend",
93 .alias = "idle-cycles-backend",
94 },
95 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
96 .symbol = "ref-cycles",
97 .alias = "",
98 },
99};
100
101struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
102 [PERF_COUNT_SW_CPU_CLOCK] = {
103 .symbol = "cpu-clock",
104 .alias = "",
105 },
106 [PERF_COUNT_SW_TASK_CLOCK] = {
107 .symbol = "task-clock",
108 .alias = "",
109 },
110 [PERF_COUNT_SW_PAGE_FAULTS] = {
111 .symbol = "page-faults",
112 .alias = "faults",
113 },
114 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
115 .symbol = "context-switches",
116 .alias = "cs",
117 },
118 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
119 .symbol = "cpu-migrations",
120 .alias = "migrations",
121 },
122 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
123 .symbol = "minor-faults",
124 .alias = "",
125 },
126 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
127 .symbol = "major-faults",
128 .alias = "",
129 },
130 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
131 .symbol = "alignment-faults",
132 .alias = "",
133 },
134 [PERF_COUNT_SW_EMULATION_FAULTS] = {
135 .symbol = "emulation-faults",
136 .alias = "",
137 },
138 [PERF_COUNT_SW_DUMMY] = {
139 .symbol = "dummy",
140 .alias = "",
141 },
142 [PERF_COUNT_SW_BPF_OUTPUT] = {
143 .symbol = "bpf-output",
144 .alias = "",
145 },
146};
147
148#define __PERF_EVENT_FIELD(config, name) \
149 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
150
151#define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
152#define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
153#define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
154#define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
155
156#define for_each_subsystem(sys_dir, sys_dirent) \
157 while ((sys_dirent = readdir(sys_dir)) != NULL) \
158 if (sys_dirent->d_type == DT_DIR && \
159 (strcmp(sys_dirent->d_name, ".")) && \
160 (strcmp(sys_dirent->d_name, "..")))
161
162static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
163{
164 char evt_path[MAXPATHLEN];
165 int fd;
166
167 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
168 fd = open(evt_path, O_RDONLY);
169 if (fd < 0)
170 return -EINVAL;
171 close(fd);
172
173 return 0;
174}
175
176#define for_each_event(dir_path, evt_dir, evt_dirent) \
177 while ((evt_dirent = readdir(evt_dir)) != NULL) \
178 if (evt_dirent->d_type == DT_DIR && \
179 (strcmp(evt_dirent->d_name, ".")) && \
180 (strcmp(evt_dirent->d_name, "..")) && \
181 (!tp_event_has_id(dir_path, evt_dirent)))
182
183#define MAX_EVENT_LENGTH 512
184
185
186struct tracepoint_path *tracepoint_id_to_path(u64 config)
187{
188 struct tracepoint_path *path = NULL;
189 DIR *sys_dir, *evt_dir;
190 struct dirent *sys_dirent, *evt_dirent;
191 char id_buf[24];
192 int fd;
193 u64 id;
194 char evt_path[MAXPATHLEN];
195 char *dir_path;
196
197 sys_dir = tracing_events__opendir();
198 if (!sys_dir)
199 return NULL;
200
201 for_each_subsystem(sys_dir, sys_dirent) {
202 dir_path = get_events_file(sys_dirent->d_name);
203 if (!dir_path)
204 continue;
205 evt_dir = opendir(dir_path);
206 if (!evt_dir)
207 goto next;
208
209 for_each_event(dir_path, evt_dir, evt_dirent) {
210
211 scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
212 evt_dirent->d_name);
213 fd = open(evt_path, O_RDONLY);
214 if (fd < 0)
215 continue;
216 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
217 close(fd);
218 continue;
219 }
220 close(fd);
221 id = atoll(id_buf);
222 if (id == config) {
223 put_events_file(dir_path);
224 closedir(evt_dir);
225 closedir(sys_dir);
226 path = zalloc(sizeof(*path));
227 if (!path)
228 return NULL;
229 path->system = malloc(MAX_EVENT_LENGTH);
230 if (!path->system) {
231 free(path);
232 return NULL;
233 }
234 path->name = malloc(MAX_EVENT_LENGTH);
235 if (!path->name) {
236 zfree(&path->system);
237 free(path);
238 return NULL;
239 }
240 strncpy(path->system, sys_dirent->d_name,
241 MAX_EVENT_LENGTH);
242 strncpy(path->name, evt_dirent->d_name,
243 MAX_EVENT_LENGTH);
244 return path;
245 }
246 }
247 closedir(evt_dir);
248next:
249 put_events_file(dir_path);
250 }
251
252 closedir(sys_dir);
253 return NULL;
254}
255
256struct tracepoint_path *tracepoint_name_to_path(const char *name)
257{
258 struct tracepoint_path *path = zalloc(sizeof(*path));
259 char *str = strchr(name, ':');
260
261 if (path == NULL || str == NULL) {
262 free(path);
263 return NULL;
264 }
265
266 path->system = strndup(name, str - name);
267 path->name = strdup(str+1);
268
269 if (path->system == NULL || path->name == NULL) {
270 zfree(&path->system);
271 zfree(&path->name);
272 zfree(&path);
273 }
274
275 return path;
276}
277
278const char *event_type(int type)
279{
280 switch (type) {
281 case PERF_TYPE_HARDWARE:
282 return "hardware";
283
284 case PERF_TYPE_SOFTWARE:
285 return "software";
286
287 case PERF_TYPE_TRACEPOINT:
288 return "tracepoint";
289
290 case PERF_TYPE_HW_CACHE:
291 return "hardware-cache";
292
293 default:
294 break;
295 }
296
297 return "unknown";
298}
299
300static int parse_events__is_name_term(struct parse_events_term *term)
301{
302 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
303}
304
305static char *get_config_name(struct list_head *head_terms)
306{
307 struct parse_events_term *term;
308
309 if (!head_terms)
310 return NULL;
311
312 list_for_each_entry(term, head_terms, list)
313 if (parse_events__is_name_term(term))
314 return term->val.str;
315
316 return NULL;
317}
318
319static struct evsel *
320__add_event(struct list_head *list, int *idx,
321 struct perf_event_attr *attr,
322 char *name, struct perf_pmu *pmu,
323 struct list_head *config_terms, bool auto_merge_stats,
324 const char *cpu_list)
325{
326 struct evsel *evsel;
327 struct perf_cpu_map *cpus = pmu ? pmu->cpus :
328 cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
329
330 event_attr_init(attr);
331
332 evsel = perf_evsel__new_idx(attr, *idx);
333 if (!evsel)
334 return NULL;
335
336 (*idx)++;
337 evsel->core.cpus = perf_cpu_map__get(cpus);
338 evsel->core.own_cpus = perf_cpu_map__get(cpus);
339 evsel->core.system_wide = pmu ? pmu->is_uncore : false;
340 evsel->auto_merge_stats = auto_merge_stats;
341
342 if (name)
343 evsel->name = strdup(name);
344
345 if (config_terms)
346 list_splice(config_terms, &evsel->config_terms);
347
348 list_add_tail(&evsel->core.node, list);
349 return evsel;
350}
351
352static int add_event(struct list_head *list, int *idx,
353 struct perf_event_attr *attr, char *name,
354 struct list_head *config_terms)
355{
356 return __add_event(list, idx, attr, name, NULL, config_terms, false, NULL) ? 0 : -ENOMEM;
357}
358
359static int add_event_tool(struct list_head *list, int *idx,
360 enum perf_tool_event tool_event)
361{
362 struct evsel *evsel;
363 struct perf_event_attr attr = {
364 .type = PERF_TYPE_SOFTWARE,
365 .config = PERF_COUNT_SW_DUMMY,
366 };
367
368 evsel = __add_event(list, idx, &attr, NULL, NULL, NULL, false, "0");
369 if (!evsel)
370 return -ENOMEM;
371 evsel->tool_event = tool_event;
372 if (tool_event == PERF_TOOL_DURATION_TIME)
373 evsel->unit = strdup("ns");
374 return 0;
375}
376
377static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
378{
379 int i, j;
380 int n, longest = -1;
381
382 for (i = 0; i < size; i++) {
383 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
384 n = strlen(names[i][j]);
385 if (n > longest && !strncasecmp(str, names[i][j], n))
386 longest = n;
387 }
388 if (longest > 0)
389 return i;
390 }
391
392 return -1;
393}
394
395typedef int config_term_func_t(struct perf_event_attr *attr,
396 struct parse_events_term *term,
397 struct parse_events_error *err);
398static int config_term_common(struct perf_event_attr *attr,
399 struct parse_events_term *term,
400 struct parse_events_error *err);
401static int config_attr(struct perf_event_attr *attr,
402 struct list_head *head,
403 struct parse_events_error *err,
404 config_term_func_t config_term);
405
406int parse_events_add_cache(struct list_head *list, int *idx,
407 char *type, char *op_result1, char *op_result2,
408 struct parse_events_error *err,
409 struct list_head *head_config)
410{
411 struct perf_event_attr attr;
412 LIST_HEAD(config_terms);
413 char name[MAX_NAME_LEN], *config_name;
414 int cache_type = -1, cache_op = -1, cache_result = -1;
415 char *op_result[2] = { op_result1, op_result2 };
416 int i, n;
417
418 /*
419 * No fallback - if we cannot get a clear cache type
420 * then bail out:
421 */
422 cache_type = parse_aliases(type, perf_evsel__hw_cache,
423 PERF_COUNT_HW_CACHE_MAX);
424 if (cache_type == -1)
425 return -EINVAL;
426
427 config_name = get_config_name(head_config);
428 n = snprintf(name, MAX_NAME_LEN, "%s", type);
429
430 for (i = 0; (i < 2) && (op_result[i]); i++) {
431 char *str = op_result[i];
432
433 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
434
435 if (cache_op == -1) {
436 cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
437 PERF_COUNT_HW_CACHE_OP_MAX);
438 if (cache_op >= 0) {
439 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
440 return -EINVAL;
441 continue;
442 }
443 }
444
445 if (cache_result == -1) {
446 cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
447 PERF_COUNT_HW_CACHE_RESULT_MAX);
448 if (cache_result >= 0)
449 continue;
450 }
451 }
452
453 /*
454 * Fall back to reads:
455 */
456 if (cache_op == -1)
457 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
458
459 /*
460 * Fall back to accesses:
461 */
462 if (cache_result == -1)
463 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
464
465 memset(&attr, 0, sizeof(attr));
466 attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
467 attr.type = PERF_TYPE_HW_CACHE;
468
469 if (head_config) {
470 if (config_attr(&attr, head_config, err,
471 config_term_common))
472 return -EINVAL;
473
474 if (get_config_terms(head_config, &config_terms))
475 return -ENOMEM;
476 }
477 return add_event(list, idx, &attr, config_name ? : name, &config_terms);
478}
479
480static void tracepoint_error(struct parse_events_error *e, int err,
481 const char *sys, const char *name)
482{
483 char help[BUFSIZ];
484
485 if (!e)
486 return;
487
488 /*
489 * We get error directly from syscall errno ( > 0),
490 * or from encoded pointer's error ( < 0).
491 */
492 err = abs(err);
493
494 switch (err) {
495 case EACCES:
496 e->str = strdup("can't access trace events");
497 break;
498 case ENOENT:
499 e->str = strdup("unknown tracepoint");
500 break;
501 default:
502 e->str = strdup("failed to add tracepoint");
503 break;
504 }
505
506 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
507 e->help = strdup(help);
508}
509
510static int add_tracepoint(struct list_head *list, int *idx,
511 const char *sys_name, const char *evt_name,
512 struct parse_events_error *err,
513 struct list_head *head_config)
514{
515 struct evsel *evsel;
516
517 evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
518 if (IS_ERR(evsel)) {
519 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
520 return PTR_ERR(evsel);
521 }
522
523 if (head_config) {
524 LIST_HEAD(config_terms);
525
526 if (get_config_terms(head_config, &config_terms))
527 return -ENOMEM;
528 list_splice(&config_terms, &evsel->config_terms);
529 }
530
531 list_add_tail(&evsel->core.node, list);
532 return 0;
533}
534
535static int add_tracepoint_multi_event(struct list_head *list, int *idx,
536 const char *sys_name, const char *evt_name,
537 struct parse_events_error *err,
538 struct list_head *head_config)
539{
540 char *evt_path;
541 struct dirent *evt_ent;
542 DIR *evt_dir;
543 int ret = 0, found = 0;
544
545 evt_path = get_events_file(sys_name);
546 if (!evt_path) {
547 tracepoint_error(err, errno, sys_name, evt_name);
548 return -1;
549 }
550 evt_dir = opendir(evt_path);
551 if (!evt_dir) {
552 put_events_file(evt_path);
553 tracepoint_error(err, errno, sys_name, evt_name);
554 return -1;
555 }
556
557 while (!ret && (evt_ent = readdir(evt_dir))) {
558 if (!strcmp(evt_ent->d_name, ".")
559 || !strcmp(evt_ent->d_name, "..")
560 || !strcmp(evt_ent->d_name, "enable")
561 || !strcmp(evt_ent->d_name, "filter"))
562 continue;
563
564 if (!strglobmatch(evt_ent->d_name, evt_name))
565 continue;
566
567 found++;
568
569 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
570 err, head_config);
571 }
572
573 if (!found) {
574 tracepoint_error(err, ENOENT, sys_name, evt_name);
575 ret = -1;
576 }
577
578 put_events_file(evt_path);
579 closedir(evt_dir);
580 return ret;
581}
582
583static int add_tracepoint_event(struct list_head *list, int *idx,
584 const char *sys_name, const char *evt_name,
585 struct parse_events_error *err,
586 struct list_head *head_config)
587{
588 return strpbrk(evt_name, "*?") ?
589 add_tracepoint_multi_event(list, idx, sys_name, evt_name,
590 err, head_config) :
591 add_tracepoint(list, idx, sys_name, evt_name,
592 err, head_config);
593}
594
595static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
596 const char *sys_name, const char *evt_name,
597 struct parse_events_error *err,
598 struct list_head *head_config)
599{
600 struct dirent *events_ent;
601 DIR *events_dir;
602 int ret = 0;
603
604 events_dir = tracing_events__opendir();
605 if (!events_dir) {
606 tracepoint_error(err, errno, sys_name, evt_name);
607 return -1;
608 }
609
610 while (!ret && (events_ent = readdir(events_dir))) {
611 if (!strcmp(events_ent->d_name, ".")
612 || !strcmp(events_ent->d_name, "..")
613 || !strcmp(events_ent->d_name, "enable")
614 || !strcmp(events_ent->d_name, "header_event")
615 || !strcmp(events_ent->d_name, "header_page"))
616 continue;
617
618 if (!strglobmatch(events_ent->d_name, sys_name))
619 continue;
620
621 ret = add_tracepoint_event(list, idx, events_ent->d_name,
622 evt_name, err, head_config);
623 }
624
625 closedir(events_dir);
626 return ret;
627}
628
629struct __add_bpf_event_param {
630 struct parse_events_state *parse_state;
631 struct list_head *list;
632 struct list_head *head_config;
633};
634
635static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
636 void *_param)
637{
638 LIST_HEAD(new_evsels);
639 struct __add_bpf_event_param *param = _param;
640 struct parse_events_state *parse_state = param->parse_state;
641 struct list_head *list = param->list;
642 struct evsel *pos;
643 int err;
644 /*
645 * Check if we should add the event, i.e. if it is a TP but starts with a '!',
646 * then don't add the tracepoint, this will be used for something else, like
647 * adding to a BPF_MAP_TYPE_PROG_ARRAY.
648 *
649 * See tools/perf/examples/bpf/augmented_raw_syscalls.c
650 */
651 if (group[0] == '!')
652 return 0;
653
654 pr_debug("add bpf event %s:%s and attach bpf program %d\n",
655 group, event, fd);
656
657 err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
658 event, parse_state->error,
659 param->head_config);
660 if (err) {
661 struct evsel *evsel, *tmp;
662
663 pr_debug("Failed to add BPF event %s:%s\n",
664 group, event);
665 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
666 list_del_init(&evsel->core.node);
667 evsel__delete(evsel);
668 }
669 return err;
670 }
671 pr_debug("adding %s:%s\n", group, event);
672
673 list_for_each_entry(pos, &new_evsels, core.node) {
674 pr_debug("adding %s:%s to %p\n",
675 group, event, pos);
676 pos->bpf_fd = fd;
677 pos->bpf_obj = obj;
678 }
679 list_splice(&new_evsels, list);
680 return 0;
681}
682
683int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
684 struct list_head *list,
685 struct bpf_object *obj,
686 struct list_head *head_config)
687{
688 int err;
689 char errbuf[BUFSIZ];
690 struct __add_bpf_event_param param = {parse_state, list, head_config};
691 static bool registered_unprobe_atexit = false;
692
693 if (IS_ERR(obj) || !obj) {
694 snprintf(errbuf, sizeof(errbuf),
695 "Internal error: load bpf obj with NULL");
696 err = -EINVAL;
697 goto errout;
698 }
699
700 /*
701 * Register atexit handler before calling bpf__probe() so
702 * bpf__probe() don't need to unprobe probe points its already
703 * created when failure.
704 */
705 if (!registered_unprobe_atexit) {
706 atexit(bpf__clear);
707 registered_unprobe_atexit = true;
708 }
709
710 err = bpf__probe(obj);
711 if (err) {
712 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
713 goto errout;
714 }
715
716 err = bpf__load(obj);
717 if (err) {
718 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
719 goto errout;
720 }
721
722 err = bpf__foreach_event(obj, add_bpf_event, ¶m);
723 if (err) {
724 snprintf(errbuf, sizeof(errbuf),
725 "Attach events in BPF object failed");
726 goto errout;
727 }
728
729 return 0;
730errout:
731 parse_state->error->help = strdup("(add -v to see detail)");
732 parse_state->error->str = strdup(errbuf);
733 return err;
734}
735
736static int
737parse_events_config_bpf(struct parse_events_state *parse_state,
738 struct bpf_object *obj,
739 struct list_head *head_config)
740{
741 struct parse_events_term *term;
742 int error_pos;
743
744 if (!head_config || list_empty(head_config))
745 return 0;
746
747 list_for_each_entry(term, head_config, list) {
748 char errbuf[BUFSIZ];
749 int err;
750
751 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
752 snprintf(errbuf, sizeof(errbuf),
753 "Invalid config term for BPF object");
754 errbuf[BUFSIZ - 1] = '\0';
755
756 parse_state->error->idx = term->err_term;
757 parse_state->error->str = strdup(errbuf);
758 return -EINVAL;
759 }
760
761 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
762 if (err) {
763 bpf__strerror_config_obj(obj, term, parse_state->evlist,
764 &error_pos, err, errbuf,
765 sizeof(errbuf));
766 parse_state->error->help = strdup(
767"Hint:\tValid config terms:\n"
768" \tmap:[<arraymap>].value<indices>=[value]\n"
769" \tmap:[<eventmap>].event<indices>=[event]\n"
770"\n"
771" \twhere <indices> is something like [0,3...5] or [all]\n"
772" \t(add -v to see detail)");
773 parse_state->error->str = strdup(errbuf);
774 if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
775 parse_state->error->idx = term->err_val;
776 else
777 parse_state->error->idx = term->err_term + error_pos;
778 return err;
779 }
780 }
781 return 0;
782}
783
784/*
785 * Split config terms:
786 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
787 * 'call-graph=fp' is 'evt config', should be applied to each
788 * events in bpf.c.
789 * 'map:array.value[0]=1' is 'obj config', should be processed
790 * with parse_events_config_bpf.
791 *
792 * Move object config terms from the first list to obj_head_config.
793 */
794static void
795split_bpf_config_terms(struct list_head *evt_head_config,
796 struct list_head *obj_head_config)
797{
798 struct parse_events_term *term, *temp;
799
800 /*
801 * Currectly, all possible user config term
802 * belong to bpf object. parse_events__is_hardcoded_term()
803 * happends to be a good flag.
804 *
805 * See parse_events_config_bpf() and
806 * config_term_tracepoint().
807 */
808 list_for_each_entry_safe(term, temp, evt_head_config, list)
809 if (!parse_events__is_hardcoded_term(term))
810 list_move_tail(&term->list, obj_head_config);
811}
812
813int parse_events_load_bpf(struct parse_events_state *parse_state,
814 struct list_head *list,
815 char *bpf_file_name,
816 bool source,
817 struct list_head *head_config)
818{
819 int err;
820 struct bpf_object *obj;
821 LIST_HEAD(obj_head_config);
822
823 if (head_config)
824 split_bpf_config_terms(head_config, &obj_head_config);
825
826 obj = bpf__prepare_load(bpf_file_name, source);
827 if (IS_ERR(obj)) {
828 char errbuf[BUFSIZ];
829
830 err = PTR_ERR(obj);
831
832 if (err == -ENOTSUP)
833 snprintf(errbuf, sizeof(errbuf),
834 "BPF support is not compiled");
835 else
836 bpf__strerror_prepare_load(bpf_file_name,
837 source,
838 -err, errbuf,
839 sizeof(errbuf));
840
841 parse_state->error->help = strdup("(add -v to see detail)");
842 parse_state->error->str = strdup(errbuf);
843 return err;
844 }
845
846 err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
847 if (err)
848 return err;
849 err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
850
851 /*
852 * Caller doesn't know anything about obj_head_config,
853 * so combine them together again before returnning.
854 */
855 if (head_config)
856 list_splice_tail(&obj_head_config, head_config);
857 return err;
858}
859
860static int
861parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
862{
863 int i;
864
865 for (i = 0; i < 3; i++) {
866 if (!type || !type[i])
867 break;
868
869#define CHECK_SET_TYPE(bit) \
870do { \
871 if (attr->bp_type & bit) \
872 return -EINVAL; \
873 else \
874 attr->bp_type |= bit; \
875} while (0)
876
877 switch (type[i]) {
878 case 'r':
879 CHECK_SET_TYPE(HW_BREAKPOINT_R);
880 break;
881 case 'w':
882 CHECK_SET_TYPE(HW_BREAKPOINT_W);
883 break;
884 case 'x':
885 CHECK_SET_TYPE(HW_BREAKPOINT_X);
886 break;
887 default:
888 return -EINVAL;
889 }
890 }
891
892#undef CHECK_SET_TYPE
893
894 if (!attr->bp_type) /* Default */
895 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
896
897 return 0;
898}
899
900int parse_events_add_breakpoint(struct list_head *list, int *idx,
901 void *ptr, char *type, u64 len)
902{
903 struct perf_event_attr attr;
904
905 memset(&attr, 0, sizeof(attr));
906 attr.bp_addr = (unsigned long) ptr;
907
908 if (parse_breakpoint_type(type, &attr))
909 return -EINVAL;
910
911 /* Provide some defaults if len is not specified */
912 if (!len) {
913 if (attr.bp_type == HW_BREAKPOINT_X)
914 len = sizeof(long);
915 else
916 len = HW_BREAKPOINT_LEN_4;
917 }
918
919 attr.bp_len = len;
920
921 attr.type = PERF_TYPE_BREAKPOINT;
922 attr.sample_period = 1;
923
924 return add_event(list, idx, &attr, NULL, NULL);
925}
926
927static int check_type_val(struct parse_events_term *term,
928 struct parse_events_error *err,
929 int type)
930{
931 if (type == term->type_val)
932 return 0;
933
934 if (err) {
935 err->idx = term->err_val;
936 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
937 err->str = strdup("expected numeric value");
938 else
939 err->str = strdup("expected string value");
940 }
941 return -EINVAL;
942}
943
944/*
945 * Update according to parse-events.l
946 */
947static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
948 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>",
949 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config",
950 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1",
951 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2",
952 [PARSE_EVENTS__TERM_TYPE_NAME] = "name",
953 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period",
954 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq",
955 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type",
956 [PARSE_EVENTS__TERM_TYPE_TIME] = "time",
957 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph",
958 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size",
959 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit",
960 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit",
961 [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack",
962 [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS] = "nr",
963 [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite",
964 [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite",
965 [PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config",
966 [PARSE_EVENTS__TERM_TYPE_PERCORE] = "percore",
967 [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT] = "aux-output",
968};
969
970static bool config_term_shrinked;
971
972static bool
973config_term_avail(int term_type, struct parse_events_error *err)
974{
975 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
976 err->str = strdup("Invalid term_type");
977 return false;
978 }
979 if (!config_term_shrinked)
980 return true;
981
982 switch (term_type) {
983 case PARSE_EVENTS__TERM_TYPE_CONFIG:
984 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
985 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
986 case PARSE_EVENTS__TERM_TYPE_NAME:
987 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
988 case PARSE_EVENTS__TERM_TYPE_PERCORE:
989 return true;
990 default:
991 if (!err)
992 return false;
993
994 /* term_type is validated so indexing is safe */
995 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
996 config_term_names[term_type]) < 0)
997 err->str = NULL;
998 return false;
999 }
1000}
1001
1002void parse_events__shrink_config_terms(void)
1003{
1004 config_term_shrinked = true;
1005}
1006
1007static int config_term_common(struct perf_event_attr *attr,
1008 struct parse_events_term *term,
1009 struct parse_events_error *err)
1010{
1011#define CHECK_TYPE_VAL(type) \
1012do { \
1013 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1014 return -EINVAL; \
1015} while (0)
1016
1017 switch (term->type_term) {
1018 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1019 CHECK_TYPE_VAL(NUM);
1020 attr->config = term->val.num;
1021 break;
1022 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1023 CHECK_TYPE_VAL(NUM);
1024 attr->config1 = term->val.num;
1025 break;
1026 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1027 CHECK_TYPE_VAL(NUM);
1028 attr->config2 = term->val.num;
1029 break;
1030 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1031 CHECK_TYPE_VAL(NUM);
1032 break;
1033 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1034 CHECK_TYPE_VAL(NUM);
1035 break;
1036 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1037 CHECK_TYPE_VAL(STR);
1038 if (strcmp(term->val.str, "no") &&
1039 parse_branch_str(term->val.str, &attr->branch_sample_type)) {
1040 err->str = strdup("invalid branch sample type");
1041 err->idx = term->err_val;
1042 return -EINVAL;
1043 }
1044 break;
1045 case PARSE_EVENTS__TERM_TYPE_TIME:
1046 CHECK_TYPE_VAL(NUM);
1047 if (term->val.num > 1) {
1048 err->str = strdup("expected 0 or 1");
1049 err->idx = term->err_val;
1050 return -EINVAL;
1051 }
1052 break;
1053 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1054 CHECK_TYPE_VAL(STR);
1055 break;
1056 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1057 CHECK_TYPE_VAL(NUM);
1058 break;
1059 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1060 CHECK_TYPE_VAL(NUM);
1061 break;
1062 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1063 CHECK_TYPE_VAL(NUM);
1064 break;
1065 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1066 CHECK_TYPE_VAL(NUM);
1067 break;
1068 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1069 CHECK_TYPE_VAL(NUM);
1070 break;
1071 case PARSE_EVENTS__TERM_TYPE_NAME:
1072 CHECK_TYPE_VAL(STR);
1073 break;
1074 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1075 CHECK_TYPE_VAL(NUM);
1076 break;
1077 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1078 CHECK_TYPE_VAL(NUM);
1079 break;
1080 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1081 CHECK_TYPE_VAL(NUM);
1082 if ((unsigned int)term->val.num > 1) {
1083 err->str = strdup("expected 0 or 1");
1084 err->idx = term->err_val;
1085 return -EINVAL;
1086 }
1087 break;
1088 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1089 CHECK_TYPE_VAL(NUM);
1090 break;
1091 default:
1092 err->str = strdup("unknown term");
1093 err->idx = term->err_term;
1094 err->help = parse_events_formats_error_string(NULL);
1095 return -EINVAL;
1096 }
1097
1098 /*
1099 * Check term availbility after basic checking so
1100 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1101 *
1102 * If check availbility at the entry of this function,
1103 * user will see "'<sysfs term>' is not usable in 'perf stat'"
1104 * if an invalid config term is provided for legacy events
1105 * (for example, instructions/badterm/...), which is confusing.
1106 */
1107 if (!config_term_avail(term->type_term, err))
1108 return -EINVAL;
1109 return 0;
1110#undef CHECK_TYPE_VAL
1111}
1112
1113static int config_term_pmu(struct perf_event_attr *attr,
1114 struct parse_events_term *term,
1115 struct parse_events_error *err)
1116{
1117 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1118 term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1119 /*
1120 * Always succeed for sysfs terms, as we dont know
1121 * at this point what type they need to have.
1122 */
1123 return 0;
1124 else
1125 return config_term_common(attr, term, err);
1126}
1127
1128static int config_term_tracepoint(struct perf_event_attr *attr,
1129 struct parse_events_term *term,
1130 struct parse_events_error *err)
1131{
1132 switch (term->type_term) {
1133 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1134 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1135 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1136 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1137 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1138 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1139 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1140 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1141 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1142 return config_term_common(attr, term, err);
1143 default:
1144 if (err) {
1145 err->idx = term->err_term;
1146 err->str = strdup("unknown term");
1147 err->help = strdup("valid terms: call-graph,stack-size\n");
1148 }
1149 return -EINVAL;
1150 }
1151
1152 return 0;
1153}
1154
1155static int config_attr(struct perf_event_attr *attr,
1156 struct list_head *head,
1157 struct parse_events_error *err,
1158 config_term_func_t config_term)
1159{
1160 struct parse_events_term *term;
1161
1162 list_for_each_entry(term, head, list)
1163 if (config_term(attr, term, err))
1164 return -EINVAL;
1165
1166 return 0;
1167}
1168
1169static int get_config_terms(struct list_head *head_config,
1170 struct list_head *head_terms __maybe_unused)
1171{
1172#define ADD_CONFIG_TERM(__type, __name, __val) \
1173do { \
1174 struct perf_evsel_config_term *__t; \
1175 \
1176 __t = zalloc(sizeof(*__t)); \
1177 if (!__t) \
1178 return -ENOMEM; \
1179 \
1180 INIT_LIST_HEAD(&__t->list); \
1181 __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
1182 __t->val.__name = __val; \
1183 __t->weak = term->weak; \
1184 list_add_tail(&__t->list, head_terms); \
1185} while (0)
1186
1187 struct parse_events_term *term;
1188
1189 list_for_each_entry(term, head_config, list) {
1190 switch (term->type_term) {
1191 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1192 ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1193 break;
1194 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1195 ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1196 break;
1197 case PARSE_EVENTS__TERM_TYPE_TIME:
1198 ADD_CONFIG_TERM(TIME, time, term->val.num);
1199 break;
1200 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1201 ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1202 break;
1203 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1204 ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1205 break;
1206 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1207 ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1208 break;
1209 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1210 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1211 break;
1212 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1213 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1214 break;
1215 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1216 ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1217 break;
1218 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1219 ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num);
1220 break;
1221 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1222 ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1223 break;
1224 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1225 ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1226 break;
1227 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1228 ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1229 break;
1230 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1231 ADD_CONFIG_TERM(PERCORE, percore,
1232 term->val.num ? true : false);
1233 break;
1234 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1235 ADD_CONFIG_TERM(AUX_OUTPUT, aux_output, term->val.num ? 1 : 0);
1236 break;
1237 default:
1238 break;
1239 }
1240 }
1241#undef ADD_EVSEL_CONFIG
1242 return 0;
1243}
1244
1245int parse_events_add_tracepoint(struct list_head *list, int *idx,
1246 const char *sys, const char *event,
1247 struct parse_events_error *err,
1248 struct list_head *head_config)
1249{
1250 if (head_config) {
1251 struct perf_event_attr attr;
1252
1253 if (config_attr(&attr, head_config, err,
1254 config_term_tracepoint))
1255 return -EINVAL;
1256 }
1257
1258 if (strpbrk(sys, "*?"))
1259 return add_tracepoint_multi_sys(list, idx, sys, event,
1260 err, head_config);
1261 else
1262 return add_tracepoint_event(list, idx, sys, event,
1263 err, head_config);
1264}
1265
1266int parse_events_add_numeric(struct parse_events_state *parse_state,
1267 struct list_head *list,
1268 u32 type, u64 config,
1269 struct list_head *head_config)
1270{
1271 struct perf_event_attr attr;
1272 LIST_HEAD(config_terms);
1273
1274 memset(&attr, 0, sizeof(attr));
1275 attr.type = type;
1276 attr.config = config;
1277
1278 if (head_config) {
1279 if (config_attr(&attr, head_config, parse_state->error,
1280 config_term_common))
1281 return -EINVAL;
1282
1283 if (get_config_terms(head_config, &config_terms))
1284 return -ENOMEM;
1285 }
1286
1287 return add_event(list, &parse_state->idx, &attr,
1288 get_config_name(head_config), &config_terms);
1289}
1290
1291int parse_events_add_tool(struct parse_events_state *parse_state,
1292 struct list_head *list,
1293 enum perf_tool_event tool_event)
1294{
1295 return add_event_tool(list, &parse_state->idx, tool_event);
1296}
1297
1298static bool config_term_percore(struct list_head *config_terms)
1299{
1300 struct perf_evsel_config_term *term;
1301
1302 list_for_each_entry(term, config_terms, list) {
1303 if (term->type == PERF_EVSEL__CONFIG_TERM_PERCORE)
1304 return term->val.percore;
1305 }
1306
1307 return false;
1308}
1309
1310int parse_events_add_pmu(struct parse_events_state *parse_state,
1311 struct list_head *list, char *name,
1312 struct list_head *head_config,
1313 bool auto_merge_stats,
1314 bool use_alias)
1315{
1316 struct perf_event_attr attr;
1317 struct perf_pmu_info info;
1318 struct perf_pmu *pmu;
1319 struct evsel *evsel;
1320 struct parse_events_error *err = parse_state->error;
1321 bool use_uncore_alias;
1322 LIST_HEAD(config_terms);
1323
1324 pmu = perf_pmu__find(name);
1325 if (!pmu) {
1326 if (asprintf(&err->str,
1327 "Cannot find PMU `%s'. Missing kernel support?",
1328 name) < 0)
1329 err->str = NULL;
1330 return -EINVAL;
1331 }
1332
1333 if (pmu->default_config) {
1334 memcpy(&attr, pmu->default_config,
1335 sizeof(struct perf_event_attr));
1336 } else {
1337 memset(&attr, 0, sizeof(attr));
1338 }
1339
1340 use_uncore_alias = (pmu->is_uncore && use_alias);
1341
1342 if (!head_config) {
1343 attr.type = pmu->type;
1344 evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL,
1345 auto_merge_stats, NULL);
1346 if (evsel) {
1347 evsel->pmu_name = name;
1348 evsel->use_uncore_alias = use_uncore_alias;
1349 return 0;
1350 } else {
1351 return -ENOMEM;
1352 }
1353 }
1354
1355 if (perf_pmu__check_alias(pmu, head_config, &info))
1356 return -EINVAL;
1357
1358 /*
1359 * Configure hardcoded terms first, no need to check
1360 * return value when called with fail == 0 ;)
1361 */
1362 if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1363 return -EINVAL;
1364
1365 if (get_config_terms(head_config, &config_terms))
1366 return -ENOMEM;
1367
1368 if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1369 return -EINVAL;
1370
1371 evsel = __add_event(list, &parse_state->idx, &attr,
1372 get_config_name(head_config), pmu,
1373 &config_terms, auto_merge_stats, NULL);
1374 if (evsel) {
1375 evsel->unit = info.unit;
1376 evsel->scale = info.scale;
1377 evsel->per_pkg = info.per_pkg;
1378 evsel->snapshot = info.snapshot;
1379 evsel->metric_expr = info.metric_expr;
1380 evsel->metric_name = info.metric_name;
1381 evsel->pmu_name = name;
1382 evsel->use_uncore_alias = use_uncore_alias;
1383 evsel->percore = config_term_percore(&evsel->config_terms);
1384 }
1385
1386 return evsel ? 0 : -ENOMEM;
1387}
1388
1389int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1390 char *str, struct list_head **listp)
1391{
1392 struct list_head *head;
1393 struct parse_events_term *term;
1394 struct list_head *list;
1395 struct perf_pmu *pmu = NULL;
1396 int ok = 0;
1397
1398 *listp = NULL;
1399 /* Add it for all PMUs that support the alias */
1400 list = malloc(sizeof(struct list_head));
1401 if (!list)
1402 return -1;
1403 INIT_LIST_HEAD(list);
1404 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1405 struct perf_pmu_alias *alias;
1406
1407 list_for_each_entry(alias, &pmu->aliases, list) {
1408 if (!strcasecmp(alias->name, str)) {
1409 head = malloc(sizeof(struct list_head));
1410 if (!head)
1411 return -1;
1412 INIT_LIST_HEAD(head);
1413 if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1414 str, 1, false, &str, NULL) < 0)
1415 return -1;
1416 list_add_tail(&term->list, head);
1417
1418 if (!parse_events_add_pmu(parse_state, list,
1419 pmu->name, head,
1420 true, true)) {
1421 pr_debug("%s -> %s/%s/\n", str,
1422 pmu->name, alias->str);
1423 ok++;
1424 }
1425
1426 parse_events_terms__delete(head);
1427 }
1428 }
1429 }
1430 if (!ok)
1431 return -1;
1432 *listp = list;
1433 return 0;
1434}
1435
1436int parse_events__modifier_group(struct list_head *list,
1437 char *event_mod)
1438{
1439 return parse_events__modifier_event(list, event_mod, true);
1440}
1441
1442/*
1443 * Check if the two uncore PMUs are from the same uncore block
1444 * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1445 */
1446static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1447{
1448 char *end_a, *end_b;
1449
1450 end_a = strrchr(pmu_name_a, '_');
1451 end_b = strrchr(pmu_name_b, '_');
1452
1453 if (!end_a || !end_b)
1454 return false;
1455
1456 if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1457 return false;
1458
1459 return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1460}
1461
1462static int
1463parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1464 struct parse_events_state *parse_state)
1465{
1466 struct evsel *evsel, *leader;
1467 uintptr_t *leaders;
1468 bool is_leader = true;
1469 int i, nr_pmu = 0, total_members, ret = 0;
1470
1471 leader = list_first_entry(list, struct evsel, core.node);
1472 evsel = list_last_entry(list, struct evsel, core.node);
1473 total_members = evsel->idx - leader->idx + 1;
1474
1475 leaders = calloc(total_members, sizeof(uintptr_t));
1476 if (WARN_ON(!leaders))
1477 return 0;
1478
1479 /*
1480 * Going through the whole group and doing sanity check.
1481 * All members must use alias, and be from the same uncore block.
1482 * Also, storing the leader events in an array.
1483 */
1484 __evlist__for_each_entry(list, evsel) {
1485
1486 /* Only split the uncore group which members use alias */
1487 if (!evsel->use_uncore_alias)
1488 goto out;
1489
1490 /* The events must be from the same uncore block */
1491 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1492 goto out;
1493
1494 if (!is_leader)
1495 continue;
1496 /*
1497 * If the event's PMU name starts to repeat, it must be a new
1498 * event. That can be used to distinguish the leader from
1499 * other members, even they have the same event name.
1500 */
1501 if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
1502 is_leader = false;
1503 continue;
1504 }
1505 /* The name is always alias name */
1506 WARN_ON(strcmp(leader->name, evsel->name));
1507
1508 /* Store the leader event for each PMU */
1509 leaders[nr_pmu++] = (uintptr_t) evsel;
1510 }
1511
1512 /* only one event alias */
1513 if (nr_pmu == total_members) {
1514 parse_state->nr_groups--;
1515 goto handled;
1516 }
1517
1518 /*
1519 * An uncore event alias is a joint name which means the same event
1520 * runs on all PMUs of a block.
1521 * Perf doesn't support mixed events from different PMUs in the same
1522 * group. The big group has to be split into multiple small groups
1523 * which only include the events from the same PMU.
1524 *
1525 * Here the uncore event aliases must be from the same uncore block.
1526 * The number of PMUs must be same for each alias. The number of new
1527 * small groups equals to the number of PMUs.
1528 * Setting the leader event for corresponding members in each group.
1529 */
1530 i = 0;
1531 __evlist__for_each_entry(list, evsel) {
1532 if (i >= nr_pmu)
1533 i = 0;
1534 evsel->leader = (struct evsel *) leaders[i++];
1535 }
1536
1537 /* The number of members and group name are same for each group */
1538 for (i = 0; i < nr_pmu; i++) {
1539 evsel = (struct evsel *) leaders[i];
1540 evsel->core.nr_members = total_members / nr_pmu;
1541 evsel->group_name = name ? strdup(name) : NULL;
1542 }
1543
1544 /* Take the new small groups into account */
1545 parse_state->nr_groups += nr_pmu - 1;
1546
1547handled:
1548 ret = 1;
1549out:
1550 free(leaders);
1551 return ret;
1552}
1553
1554void parse_events__set_leader(char *name, struct list_head *list,
1555 struct parse_events_state *parse_state)
1556{
1557 struct evsel *leader;
1558
1559 if (list_empty(list)) {
1560 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1561 return;
1562 }
1563
1564 if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1565 return;
1566
1567 __perf_evlist__set_leader(list);
1568 leader = list_entry(list->next, struct evsel, core.node);
1569 leader->group_name = name ? strdup(name) : NULL;
1570}
1571
1572/* list_event is assumed to point to malloc'ed memory */
1573void parse_events_update_lists(struct list_head *list_event,
1574 struct list_head *list_all)
1575{
1576 /*
1577 * Called for single event definition. Update the
1578 * 'all event' list, and reinit the 'single event'
1579 * list, for next event definition.
1580 */
1581 list_splice_tail(list_event, list_all);
1582 free(list_event);
1583}
1584
1585struct event_modifier {
1586 int eu;
1587 int ek;
1588 int eh;
1589 int eH;
1590 int eG;
1591 int eI;
1592 int precise;
1593 int precise_max;
1594 int exclude_GH;
1595 int sample_read;
1596 int pinned;
1597 int weak;
1598};
1599
1600static int get_event_modifier(struct event_modifier *mod, char *str,
1601 struct evsel *evsel)
1602{
1603 int eu = evsel ? evsel->core.attr.exclude_user : 0;
1604 int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1605 int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1606 int eH = evsel ? evsel->core.attr.exclude_host : 0;
1607 int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1608 int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1609 int precise = evsel ? evsel->core.attr.precise_ip : 0;
1610 int precise_max = 0;
1611 int sample_read = 0;
1612 int pinned = evsel ? evsel->core.attr.pinned : 0;
1613
1614 int exclude = eu | ek | eh;
1615 int exclude_GH = evsel ? evsel->exclude_GH : 0;
1616 int weak = 0;
1617
1618 memset(mod, 0, sizeof(*mod));
1619
1620 while (*str) {
1621 if (*str == 'u') {
1622 if (!exclude)
1623 exclude = eu = ek = eh = 1;
1624 eu = 0;
1625 } else if (*str == 'k') {
1626 if (!exclude)
1627 exclude = eu = ek = eh = 1;
1628 ek = 0;
1629 } else if (*str == 'h') {
1630 if (!exclude)
1631 exclude = eu = ek = eh = 1;
1632 eh = 0;
1633 } else if (*str == 'G') {
1634 if (!exclude_GH)
1635 exclude_GH = eG = eH = 1;
1636 eG = 0;
1637 } else if (*str == 'H') {
1638 if (!exclude_GH)
1639 exclude_GH = eG = eH = 1;
1640 eH = 0;
1641 } else if (*str == 'I') {
1642 eI = 1;
1643 } else if (*str == 'p') {
1644 precise++;
1645 /* use of precise requires exclude_guest */
1646 if (!exclude_GH)
1647 eG = 1;
1648 } else if (*str == 'P') {
1649 precise_max = 1;
1650 } else if (*str == 'S') {
1651 sample_read = 1;
1652 } else if (*str == 'D') {
1653 pinned = 1;
1654 } else if (*str == 'W') {
1655 weak = 1;
1656 } else
1657 break;
1658
1659 ++str;
1660 }
1661
1662 /*
1663 * precise ip:
1664 *
1665 * 0 - SAMPLE_IP can have arbitrary skid
1666 * 1 - SAMPLE_IP must have constant skid
1667 * 2 - SAMPLE_IP requested to have 0 skid
1668 * 3 - SAMPLE_IP must have 0 skid
1669 *
1670 * See also PERF_RECORD_MISC_EXACT_IP
1671 */
1672 if (precise > 3)
1673 return -EINVAL;
1674
1675 mod->eu = eu;
1676 mod->ek = ek;
1677 mod->eh = eh;
1678 mod->eH = eH;
1679 mod->eG = eG;
1680 mod->eI = eI;
1681 mod->precise = precise;
1682 mod->precise_max = precise_max;
1683 mod->exclude_GH = exclude_GH;
1684 mod->sample_read = sample_read;
1685 mod->pinned = pinned;
1686 mod->weak = weak;
1687
1688 return 0;
1689}
1690
1691/*
1692 * Basic modifier sanity check to validate it contains only one
1693 * instance of any modifier (apart from 'p') present.
1694 */
1695static int check_modifier(char *str)
1696{
1697 char *p = str;
1698
1699 /* The sizeof includes 0 byte as well. */
1700 if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1701 return -1;
1702
1703 while (*p) {
1704 if (*p != 'p' && strchr(p + 1, *p))
1705 return -1;
1706 p++;
1707 }
1708
1709 return 0;
1710}
1711
1712int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1713{
1714 struct evsel *evsel;
1715 struct event_modifier mod;
1716
1717 if (str == NULL)
1718 return 0;
1719
1720 if (check_modifier(str))
1721 return -EINVAL;
1722
1723 if (!add && get_event_modifier(&mod, str, NULL))
1724 return -EINVAL;
1725
1726 __evlist__for_each_entry(list, evsel) {
1727 if (add && get_event_modifier(&mod, str, evsel))
1728 return -EINVAL;
1729
1730 evsel->core.attr.exclude_user = mod.eu;
1731 evsel->core.attr.exclude_kernel = mod.ek;
1732 evsel->core.attr.exclude_hv = mod.eh;
1733 evsel->core.attr.precise_ip = mod.precise;
1734 evsel->core.attr.exclude_host = mod.eH;
1735 evsel->core.attr.exclude_guest = mod.eG;
1736 evsel->core.attr.exclude_idle = mod.eI;
1737 evsel->exclude_GH = mod.exclude_GH;
1738 evsel->sample_read = mod.sample_read;
1739 evsel->precise_max = mod.precise_max;
1740 evsel->weak_group = mod.weak;
1741
1742 if (perf_evsel__is_group_leader(evsel))
1743 evsel->core.attr.pinned = mod.pinned;
1744 }
1745
1746 return 0;
1747}
1748
1749int parse_events_name(struct list_head *list, char *name)
1750{
1751 struct evsel *evsel;
1752
1753 __evlist__for_each_entry(list, evsel) {
1754 if (!evsel->name)
1755 evsel->name = strdup(name);
1756 }
1757
1758 return 0;
1759}
1760
1761static int
1762comp_pmu(const void *p1, const void *p2)
1763{
1764 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1765 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1766
1767 return strcasecmp(pmu1->symbol, pmu2->symbol);
1768}
1769
1770static void perf_pmu__parse_cleanup(void)
1771{
1772 if (perf_pmu_events_list_num > 0) {
1773 struct perf_pmu_event_symbol *p;
1774 int i;
1775
1776 for (i = 0; i < perf_pmu_events_list_num; i++) {
1777 p = perf_pmu_events_list + i;
1778 zfree(&p->symbol);
1779 }
1780 zfree(&perf_pmu_events_list);
1781 perf_pmu_events_list_num = 0;
1782 }
1783}
1784
1785#define SET_SYMBOL(str, stype) \
1786do { \
1787 p->symbol = str; \
1788 if (!p->symbol) \
1789 goto err; \
1790 p->type = stype; \
1791} while (0)
1792
1793/*
1794 * Read the pmu events list from sysfs
1795 * Save it into perf_pmu_events_list
1796 */
1797static void perf_pmu__parse_init(void)
1798{
1799
1800 struct perf_pmu *pmu = NULL;
1801 struct perf_pmu_alias *alias;
1802 int len = 0;
1803
1804 pmu = NULL;
1805 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1806 list_for_each_entry(alias, &pmu->aliases, list) {
1807 if (strchr(alias->name, '-'))
1808 len++;
1809 len++;
1810 }
1811 }
1812
1813 if (len == 0) {
1814 perf_pmu_events_list_num = -1;
1815 return;
1816 }
1817 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1818 if (!perf_pmu_events_list)
1819 return;
1820 perf_pmu_events_list_num = len;
1821
1822 len = 0;
1823 pmu = NULL;
1824 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1825 list_for_each_entry(alias, &pmu->aliases, list) {
1826 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1827 char *tmp = strchr(alias->name, '-');
1828
1829 if (tmp != NULL) {
1830 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1831 PMU_EVENT_SYMBOL_PREFIX);
1832 p++;
1833 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1834 len += 2;
1835 } else {
1836 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1837 len++;
1838 }
1839 }
1840 }
1841 qsort(perf_pmu_events_list, len,
1842 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1843
1844 return;
1845err:
1846 perf_pmu__parse_cleanup();
1847}
1848
1849enum perf_pmu_event_symbol_type
1850perf_pmu__parse_check(const char *name)
1851{
1852 struct perf_pmu_event_symbol p, *r;
1853
1854 /* scan kernel pmu events from sysfs if needed */
1855 if (perf_pmu_events_list_num == 0)
1856 perf_pmu__parse_init();
1857 /*
1858 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1859 * cpu-cycles has been handled by hardcode.
1860 * So it must be cpu// events, not kernel pmu event.
1861 */
1862 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1863 return PMU_EVENT_SYMBOL_ERR;
1864
1865 p.symbol = strdup(name);
1866 r = bsearch(&p, perf_pmu_events_list,
1867 (size_t) perf_pmu_events_list_num,
1868 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1869 zfree(&p.symbol);
1870 return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1871}
1872
1873static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1874{
1875 YY_BUFFER_STATE buffer;
1876 void *scanner;
1877 int ret;
1878
1879 ret = parse_events_lex_init_extra(start_token, &scanner);
1880 if (ret)
1881 return ret;
1882
1883 buffer = parse_events__scan_string(str, scanner);
1884
1885#ifdef PARSER_DEBUG
1886 parse_events_debug = 1;
1887#endif
1888 ret = parse_events_parse(parse_state, scanner);
1889
1890 parse_events__flush_buffer(buffer, scanner);
1891 parse_events__delete_buffer(buffer, scanner);
1892 parse_events_lex_destroy(scanner);
1893 return ret;
1894}
1895
1896/*
1897 * parse event config string, return a list of event terms.
1898 */
1899int parse_events_terms(struct list_head *terms, const char *str)
1900{
1901 struct parse_events_state parse_state = {
1902 .terms = NULL,
1903 };
1904 int ret;
1905
1906 ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1907 if (!ret) {
1908 list_splice(parse_state.terms, terms);
1909 zfree(&parse_state.terms);
1910 return 0;
1911 }
1912
1913 parse_events_terms__delete(parse_state.terms);
1914 return ret;
1915}
1916
1917int parse_events(struct evlist *evlist, const char *str,
1918 struct parse_events_error *err)
1919{
1920 struct parse_events_state parse_state = {
1921 .list = LIST_HEAD_INIT(parse_state.list),
1922 .idx = evlist->core.nr_entries,
1923 .error = err,
1924 .evlist = evlist,
1925 };
1926 int ret;
1927
1928 ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1929 perf_pmu__parse_cleanup();
1930 if (!ret) {
1931 struct evsel *last;
1932
1933 if (list_empty(&parse_state.list)) {
1934 WARN_ONCE(true, "WARNING: event parser found nothing\n");
1935 return -1;
1936 }
1937
1938 perf_evlist__splice_list_tail(evlist, &parse_state.list);
1939 evlist->nr_groups += parse_state.nr_groups;
1940 last = evlist__last(evlist);
1941 last->cmdline_group_boundary = true;
1942
1943 return 0;
1944 }
1945
1946 /*
1947 * There are 2 users - builtin-record and builtin-test objects.
1948 * Both call evlist__delete in case of error, so we dont
1949 * need to bother.
1950 */
1951 return ret;
1952}
1953
1954#define MAX_WIDTH 1000
1955static int get_term_width(void)
1956{
1957 struct winsize ws;
1958
1959 get_term_dimensions(&ws);
1960 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1961}
1962
1963void parse_events_print_error(struct parse_events_error *err,
1964 const char *event)
1965{
1966 const char *str = "invalid or unsupported event: ";
1967 char _buf[MAX_WIDTH];
1968 char *buf = (char *) event;
1969 int idx = 0;
1970
1971 if (err->str) {
1972 /* -2 for extra '' in the final fprintf */
1973 int width = get_term_width() - 2;
1974 int len_event = strlen(event);
1975 int len_str, max_len, cut = 0;
1976
1977 /*
1978 * Maximum error index indent, we will cut
1979 * the event string if it's bigger.
1980 */
1981 int max_err_idx = 13;
1982
1983 /*
1984 * Let's be specific with the message when
1985 * we have the precise error.
1986 */
1987 str = "event syntax error: ";
1988 len_str = strlen(str);
1989 max_len = width - len_str;
1990
1991 buf = _buf;
1992
1993 /* We're cutting from the beginning. */
1994 if (err->idx > max_err_idx)
1995 cut = err->idx - max_err_idx;
1996
1997 strncpy(buf, event + cut, max_len);
1998
1999 /* Mark cut parts with '..' on both sides. */
2000 if (cut)
2001 buf[0] = buf[1] = '.';
2002
2003 if ((len_event - cut) > max_len) {
2004 buf[max_len - 1] = buf[max_len - 2] = '.';
2005 buf[max_len] = 0;
2006 }
2007
2008 idx = len_str + err->idx - cut;
2009 }
2010
2011 fprintf(stderr, "%s'%s'\n", str, buf);
2012 if (idx) {
2013 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
2014 if (err->help)
2015 fprintf(stderr, "\n%s\n", err->help);
2016 zfree(&err->str);
2017 zfree(&err->help);
2018 }
2019}
2020
2021#undef MAX_WIDTH
2022
2023int parse_events_option(const struct option *opt, const char *str,
2024 int unset __maybe_unused)
2025{
2026 struct evlist *evlist = *(struct evlist **)opt->value;
2027 struct parse_events_error err = { .idx = 0, };
2028 int ret = parse_events(evlist, str, &err);
2029
2030 if (ret) {
2031 parse_events_print_error(&err, str);
2032 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2033 }
2034
2035 return ret;
2036}
2037
2038static int
2039foreach_evsel_in_last_glob(struct evlist *evlist,
2040 int (*func)(struct evsel *evsel,
2041 const void *arg),
2042 const void *arg)
2043{
2044 struct evsel *last = NULL;
2045 int err;
2046
2047 /*
2048 * Don't return when list_empty, give func a chance to report
2049 * error when it found last == NULL.
2050 *
2051 * So no need to WARN here, let *func do this.
2052 */
2053 if (evlist->core.nr_entries > 0)
2054 last = evlist__last(evlist);
2055
2056 do {
2057 err = (*func)(last, arg);
2058 if (err)
2059 return -1;
2060 if (!last)
2061 return 0;
2062
2063 if (last->core.node.prev == &evlist->core.entries)
2064 return 0;
2065 last = list_entry(last->core.node.prev, struct evsel, core.node);
2066 } while (!last->cmdline_group_boundary);
2067
2068 return 0;
2069}
2070
2071static int set_filter(struct evsel *evsel, const void *arg)
2072{
2073 const char *str = arg;
2074 bool found = false;
2075 int nr_addr_filters = 0;
2076 struct perf_pmu *pmu = NULL;
2077
2078 if (evsel == NULL) {
2079 fprintf(stderr,
2080 "--filter option should follow a -e tracepoint or HW tracer option\n");
2081 return -1;
2082 }
2083
2084 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2085 if (perf_evsel__append_tp_filter(evsel, str) < 0) {
2086 fprintf(stderr,
2087 "not enough memory to hold filter string\n");
2088 return -1;
2089 }
2090
2091 return 0;
2092 }
2093
2094 while ((pmu = perf_pmu__scan(pmu)) != NULL)
2095 if (pmu->type == evsel->core.attr.type) {
2096 found = true;
2097 break;
2098 }
2099
2100 if (found)
2101 perf_pmu__scan_file(pmu, "nr_addr_filters",
2102 "%d", &nr_addr_filters);
2103
2104 if (!nr_addr_filters) {
2105 fprintf(stderr,
2106 "This CPU does not support address filtering\n");
2107 return -1;
2108 }
2109
2110 if (perf_evsel__append_addr_filter(evsel, str) < 0) {
2111 fprintf(stderr,
2112 "not enough memory to hold filter string\n");
2113 return -1;
2114 }
2115
2116 return 0;
2117}
2118
2119int parse_filter(const struct option *opt, const char *str,
2120 int unset __maybe_unused)
2121{
2122 struct evlist *evlist = *(struct evlist **)opt->value;
2123
2124 return foreach_evsel_in_last_glob(evlist, set_filter,
2125 (const void *)str);
2126}
2127
2128static int add_exclude_perf_filter(struct evsel *evsel,
2129 const void *arg __maybe_unused)
2130{
2131 char new_filter[64];
2132
2133 if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2134 fprintf(stderr,
2135 "--exclude-perf option should follow a -e tracepoint option\n");
2136 return -1;
2137 }
2138
2139 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2140
2141 if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
2142 fprintf(stderr,
2143 "not enough memory to hold filter string\n");
2144 return -1;
2145 }
2146
2147 return 0;
2148}
2149
2150int exclude_perf(const struct option *opt,
2151 const char *arg __maybe_unused,
2152 int unset __maybe_unused)
2153{
2154 struct evlist *evlist = *(struct evlist **)opt->value;
2155
2156 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2157 NULL);
2158}
2159
2160static const char * const event_type_descriptors[] = {
2161 "Hardware event",
2162 "Software event",
2163 "Tracepoint event",
2164 "Hardware cache event",
2165 "Raw hardware event descriptor",
2166 "Hardware breakpoint",
2167};
2168
2169static int cmp_string(const void *a, const void *b)
2170{
2171 const char * const *as = a;
2172 const char * const *bs = b;
2173
2174 return strcmp(*as, *bs);
2175}
2176
2177/*
2178 * Print the events from <debugfs_mount_point>/tracing/events
2179 */
2180
2181void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2182 bool name_only)
2183{
2184 DIR *sys_dir, *evt_dir;
2185 struct dirent *sys_dirent, *evt_dirent;
2186 char evt_path[MAXPATHLEN];
2187 char *dir_path;
2188 char **evt_list = NULL;
2189 unsigned int evt_i = 0, evt_num = 0;
2190 bool evt_num_known = false;
2191
2192restart:
2193 sys_dir = tracing_events__opendir();
2194 if (!sys_dir)
2195 return;
2196
2197 if (evt_num_known) {
2198 evt_list = zalloc(sizeof(char *) * evt_num);
2199 if (!evt_list)
2200 goto out_close_sys_dir;
2201 }
2202
2203 for_each_subsystem(sys_dir, sys_dirent) {
2204 if (subsys_glob != NULL &&
2205 !strglobmatch(sys_dirent->d_name, subsys_glob))
2206 continue;
2207
2208 dir_path = get_events_file(sys_dirent->d_name);
2209 if (!dir_path)
2210 continue;
2211 evt_dir = opendir(dir_path);
2212 if (!evt_dir)
2213 goto next;
2214
2215 for_each_event(dir_path, evt_dir, evt_dirent) {
2216 if (event_glob != NULL &&
2217 !strglobmatch(evt_dirent->d_name, event_glob))
2218 continue;
2219
2220 if (!evt_num_known) {
2221 evt_num++;
2222 continue;
2223 }
2224
2225 snprintf(evt_path, MAXPATHLEN, "%s:%s",
2226 sys_dirent->d_name, evt_dirent->d_name);
2227
2228 evt_list[evt_i] = strdup(evt_path);
2229 if (evt_list[evt_i] == NULL) {
2230 put_events_file(dir_path);
2231 goto out_close_evt_dir;
2232 }
2233 evt_i++;
2234 }
2235 closedir(evt_dir);
2236next:
2237 put_events_file(dir_path);
2238 }
2239 closedir(sys_dir);
2240
2241 if (!evt_num_known) {
2242 evt_num_known = true;
2243 goto restart;
2244 }
2245 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2246 evt_i = 0;
2247 while (evt_i < evt_num) {
2248 if (name_only) {
2249 printf("%s ", evt_list[evt_i++]);
2250 continue;
2251 }
2252 printf(" %-50s [%s]\n", evt_list[evt_i++],
2253 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2254 }
2255 if (evt_num && pager_in_use())
2256 printf("\n");
2257
2258out_free:
2259 evt_num = evt_i;
2260 for (evt_i = 0; evt_i < evt_num; evt_i++)
2261 zfree(&evt_list[evt_i]);
2262 zfree(&evt_list);
2263 return;
2264
2265out_close_evt_dir:
2266 closedir(evt_dir);
2267out_close_sys_dir:
2268 closedir(sys_dir);
2269
2270 printf("FATAL: not enough memory to print %s\n",
2271 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2272 if (evt_list)
2273 goto out_free;
2274}
2275
2276/*
2277 * Check whether event is in <debugfs_mount_point>/tracing/events
2278 */
2279
2280int is_valid_tracepoint(const char *event_string)
2281{
2282 DIR *sys_dir, *evt_dir;
2283 struct dirent *sys_dirent, *evt_dirent;
2284 char evt_path[MAXPATHLEN];
2285 char *dir_path;
2286
2287 sys_dir = tracing_events__opendir();
2288 if (!sys_dir)
2289 return 0;
2290
2291 for_each_subsystem(sys_dir, sys_dirent) {
2292 dir_path = get_events_file(sys_dirent->d_name);
2293 if (!dir_path)
2294 continue;
2295 evt_dir = opendir(dir_path);
2296 if (!evt_dir)
2297 goto next;
2298
2299 for_each_event(dir_path, evt_dir, evt_dirent) {
2300 snprintf(evt_path, MAXPATHLEN, "%s:%s",
2301 sys_dirent->d_name, evt_dirent->d_name);
2302 if (!strcmp(evt_path, event_string)) {
2303 closedir(evt_dir);
2304 closedir(sys_dir);
2305 return 1;
2306 }
2307 }
2308 closedir(evt_dir);
2309next:
2310 put_events_file(dir_path);
2311 }
2312 closedir(sys_dir);
2313 return 0;
2314}
2315
2316static bool is_event_supported(u8 type, unsigned config)
2317{
2318 bool ret = true;
2319 int open_return;
2320 struct evsel *evsel;
2321 struct perf_event_attr attr = {
2322 .type = type,
2323 .config = config,
2324 .disabled = 1,
2325 };
2326 struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2327
2328 if (tmap == NULL)
2329 return false;
2330
2331 evsel = evsel__new(&attr);
2332 if (evsel) {
2333 open_return = evsel__open(evsel, NULL, tmap);
2334 ret = open_return >= 0;
2335
2336 if (open_return == -EACCES) {
2337 /*
2338 * This happens if the paranoid value
2339 * /proc/sys/kernel/perf_event_paranoid is set to 2
2340 * Re-run with exclude_kernel set; we don't do that
2341 * by default as some ARM machines do not support it.
2342 *
2343 */
2344 evsel->core.attr.exclude_kernel = 1;
2345 ret = evsel__open(evsel, NULL, tmap) >= 0;
2346 }
2347 evsel__delete(evsel);
2348 }
2349
2350 perf_thread_map__put(tmap);
2351 return ret;
2352}
2353
2354void print_sdt_events(const char *subsys_glob, const char *event_glob,
2355 bool name_only)
2356{
2357 struct probe_cache *pcache;
2358 struct probe_cache_entry *ent;
2359 struct strlist *bidlist, *sdtlist;
2360 struct strlist_config cfg = {.dont_dupstr = true};
2361 struct str_node *nd, *nd2;
2362 char *buf, *path, *ptr = NULL;
2363 bool show_detail = false;
2364 int ret;
2365
2366 sdtlist = strlist__new(NULL, &cfg);
2367 if (!sdtlist) {
2368 pr_debug("Failed to allocate new strlist for SDT\n");
2369 return;
2370 }
2371 bidlist = build_id_cache__list_all(true);
2372 if (!bidlist) {
2373 pr_debug("Failed to get buildids: %d\n", errno);
2374 return;
2375 }
2376 strlist__for_each_entry(nd, bidlist) {
2377 pcache = probe_cache__new(nd->s, NULL);
2378 if (!pcache)
2379 continue;
2380 list_for_each_entry(ent, &pcache->entries, node) {
2381 if (!ent->sdt)
2382 continue;
2383 if (subsys_glob &&
2384 !strglobmatch(ent->pev.group, subsys_glob))
2385 continue;
2386 if (event_glob &&
2387 !strglobmatch(ent->pev.event, event_glob))
2388 continue;
2389 ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2390 ent->pev.event, nd->s);
2391 if (ret > 0)
2392 strlist__add(sdtlist, buf);
2393 }
2394 probe_cache__delete(pcache);
2395 }
2396 strlist__delete(bidlist);
2397
2398 strlist__for_each_entry(nd, sdtlist) {
2399 buf = strchr(nd->s, '@');
2400 if (buf)
2401 *(buf++) = '\0';
2402 if (name_only) {
2403 printf("%s ", nd->s);
2404 continue;
2405 }
2406 nd2 = strlist__next(nd);
2407 if (nd2) {
2408 ptr = strchr(nd2->s, '@');
2409 if (ptr)
2410 *ptr = '\0';
2411 if (strcmp(nd->s, nd2->s) == 0)
2412 show_detail = true;
2413 }
2414 if (show_detail) {
2415 path = build_id_cache__origname(buf);
2416 ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2417 if (ret > 0) {
2418 printf(" %-50s [%s]\n", buf, "SDT event");
2419 free(buf);
2420 }
2421 free(path);
2422 } else
2423 printf(" %-50s [%s]\n", nd->s, "SDT event");
2424 if (nd2) {
2425 if (strcmp(nd->s, nd2->s) != 0)
2426 show_detail = false;
2427 if (ptr)
2428 *ptr = '@';
2429 }
2430 }
2431 strlist__delete(sdtlist);
2432}
2433
2434int print_hwcache_events(const char *event_glob, bool name_only)
2435{
2436 unsigned int type, op, i, evt_i = 0, evt_num = 0;
2437 char name[64];
2438 char **evt_list = NULL;
2439 bool evt_num_known = false;
2440
2441restart:
2442 if (evt_num_known) {
2443 evt_list = zalloc(sizeof(char *) * evt_num);
2444 if (!evt_list)
2445 goto out_enomem;
2446 }
2447
2448 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2449 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2450 /* skip invalid cache type */
2451 if (!perf_evsel__is_cache_op_valid(type, op))
2452 continue;
2453
2454 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2455 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2456 name, sizeof(name));
2457 if (event_glob != NULL && !strglobmatch(name, event_glob))
2458 continue;
2459
2460 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2461 type | (op << 8) | (i << 16)))
2462 continue;
2463
2464 if (!evt_num_known) {
2465 evt_num++;
2466 continue;
2467 }
2468
2469 evt_list[evt_i] = strdup(name);
2470 if (evt_list[evt_i] == NULL)
2471 goto out_enomem;
2472 evt_i++;
2473 }
2474 }
2475 }
2476
2477 if (!evt_num_known) {
2478 evt_num_known = true;
2479 goto restart;
2480 }
2481 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2482 evt_i = 0;
2483 while (evt_i < evt_num) {
2484 if (name_only) {
2485 printf("%s ", evt_list[evt_i++]);
2486 continue;
2487 }
2488 printf(" %-50s [%s]\n", evt_list[evt_i++],
2489 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2490 }
2491 if (evt_num && pager_in_use())
2492 printf("\n");
2493
2494out_free:
2495 evt_num = evt_i;
2496 for (evt_i = 0; evt_i < evt_num; evt_i++)
2497 zfree(&evt_list[evt_i]);
2498 zfree(&evt_list);
2499 return evt_num;
2500
2501out_enomem:
2502 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2503 if (evt_list)
2504 goto out_free;
2505 return evt_num;
2506}
2507
2508static void print_tool_event(const char *name, const char *event_glob,
2509 bool name_only)
2510{
2511 if (event_glob && !strglobmatch(name, event_glob))
2512 return;
2513 if (name_only)
2514 printf("%s ", name);
2515 else
2516 printf(" %-50s [%s]\n", name, "Tool event");
2517
2518}
2519
2520void print_tool_events(const char *event_glob, bool name_only)
2521{
2522 print_tool_event("duration_time", event_glob, name_only);
2523 if (pager_in_use())
2524 printf("\n");
2525}
2526
2527void print_symbol_events(const char *event_glob, unsigned type,
2528 struct event_symbol *syms, unsigned max,
2529 bool name_only)
2530{
2531 unsigned int i, evt_i = 0, evt_num = 0;
2532 char name[MAX_NAME_LEN];
2533 char **evt_list = NULL;
2534 bool evt_num_known = false;
2535
2536restart:
2537 if (evt_num_known) {
2538 evt_list = zalloc(sizeof(char *) * evt_num);
2539 if (!evt_list)
2540 goto out_enomem;
2541 syms -= max;
2542 }
2543
2544 for (i = 0; i < max; i++, syms++) {
2545
2546 if (event_glob != NULL && syms->symbol != NULL &&
2547 !(strglobmatch(syms->symbol, event_glob) ||
2548 (syms->alias && strglobmatch(syms->alias, event_glob))))
2549 continue;
2550
2551 if (!is_event_supported(type, i))
2552 continue;
2553
2554 if (!evt_num_known) {
2555 evt_num++;
2556 continue;
2557 }
2558
2559 if (!name_only && strlen(syms->alias))
2560 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2561 else
2562 strlcpy(name, syms->symbol, MAX_NAME_LEN);
2563
2564 evt_list[evt_i] = strdup(name);
2565 if (evt_list[evt_i] == NULL)
2566 goto out_enomem;
2567 evt_i++;
2568 }
2569
2570 if (!evt_num_known) {
2571 evt_num_known = true;
2572 goto restart;
2573 }
2574 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2575 evt_i = 0;
2576 while (evt_i < evt_num) {
2577 if (name_only) {
2578 printf("%s ", evt_list[evt_i++]);
2579 continue;
2580 }
2581 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2582 }
2583 if (evt_num && pager_in_use())
2584 printf("\n");
2585
2586out_free:
2587 evt_num = evt_i;
2588 for (evt_i = 0; evt_i < evt_num; evt_i++)
2589 zfree(&evt_list[evt_i]);
2590 zfree(&evt_list);
2591 return;
2592
2593out_enomem:
2594 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2595 if (evt_list)
2596 goto out_free;
2597}
2598
2599/*
2600 * Print the help text for the event symbols:
2601 */
2602void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2603 bool long_desc, bool details_flag)
2604{
2605 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2606 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2607
2608 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2609 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2610 print_tool_events(event_glob, name_only);
2611
2612 print_hwcache_events(event_glob, name_only);
2613
2614 print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2615 details_flag);
2616
2617 if (event_glob != NULL)
2618 return;
2619
2620 if (!name_only) {
2621 printf(" %-50s [%s]\n",
2622 "rNNN",
2623 event_type_descriptors[PERF_TYPE_RAW]);
2624 printf(" %-50s [%s]\n",
2625 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2626 event_type_descriptors[PERF_TYPE_RAW]);
2627 if (pager_in_use())
2628 printf(" (see 'man perf-list' on how to encode it)\n\n");
2629
2630 printf(" %-50s [%s]\n",
2631 "mem:<addr>[/len][:access]",
2632 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2633 if (pager_in_use())
2634 printf("\n");
2635 }
2636
2637 print_tracepoint_events(NULL, NULL, name_only);
2638
2639 print_sdt_events(NULL, NULL, name_only);
2640
2641 metricgroup__print(true, true, NULL, name_only, details_flag);
2642}
2643
2644int parse_events__is_hardcoded_term(struct parse_events_term *term)
2645{
2646 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2647}
2648
2649static int new_term(struct parse_events_term **_term,
2650 struct parse_events_term *temp,
2651 char *str, u64 num)
2652{
2653 struct parse_events_term *term;
2654
2655 term = malloc(sizeof(*term));
2656 if (!term)
2657 return -ENOMEM;
2658
2659 *term = *temp;
2660 INIT_LIST_HEAD(&term->list);
2661 term->weak = false;
2662
2663 switch (term->type_val) {
2664 case PARSE_EVENTS__TERM_TYPE_NUM:
2665 term->val.num = num;
2666 break;
2667 case PARSE_EVENTS__TERM_TYPE_STR:
2668 term->val.str = str;
2669 break;
2670 default:
2671 free(term);
2672 return -EINVAL;
2673 }
2674
2675 *_term = term;
2676 return 0;
2677}
2678
2679int parse_events_term__num(struct parse_events_term **term,
2680 int type_term, char *config, u64 num,
2681 bool no_value,
2682 void *loc_term_, void *loc_val_)
2683{
2684 YYLTYPE *loc_term = loc_term_;
2685 YYLTYPE *loc_val = loc_val_;
2686
2687 struct parse_events_term temp = {
2688 .type_val = PARSE_EVENTS__TERM_TYPE_NUM,
2689 .type_term = type_term,
2690 .config = config,
2691 .no_value = no_value,
2692 .err_term = loc_term ? loc_term->first_column : 0,
2693 .err_val = loc_val ? loc_val->first_column : 0,
2694 };
2695
2696 return new_term(term, &temp, NULL, num);
2697}
2698
2699int parse_events_term__str(struct parse_events_term **term,
2700 int type_term, char *config, char *str,
2701 void *loc_term_, void *loc_val_)
2702{
2703 YYLTYPE *loc_term = loc_term_;
2704 YYLTYPE *loc_val = loc_val_;
2705
2706 struct parse_events_term temp = {
2707 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
2708 .type_term = type_term,
2709 .config = config,
2710 .err_term = loc_term ? loc_term->first_column : 0,
2711 .err_val = loc_val ? loc_val->first_column : 0,
2712 };
2713
2714 return new_term(term, &temp, str, 0);
2715}
2716
2717int parse_events_term__sym_hw(struct parse_events_term **term,
2718 char *config, unsigned idx)
2719{
2720 struct event_symbol *sym;
2721 struct parse_events_term temp = {
2722 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
2723 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
2724 .config = config ?: (char *) "event",
2725 };
2726
2727 BUG_ON(idx >= PERF_COUNT_HW_MAX);
2728 sym = &event_symbols_hw[idx];
2729
2730 return new_term(term, &temp, (char *) sym->symbol, 0);
2731}
2732
2733int parse_events_term__clone(struct parse_events_term **new,
2734 struct parse_events_term *term)
2735{
2736 struct parse_events_term temp = {
2737 .type_val = term->type_val,
2738 .type_term = term->type_term,
2739 .config = term->config,
2740 .err_term = term->err_term,
2741 .err_val = term->err_val,
2742 };
2743
2744 return new_term(new, &temp, term->val.str, term->val.num);
2745}
2746
2747int parse_events_copy_term_list(struct list_head *old,
2748 struct list_head **new)
2749{
2750 struct parse_events_term *term, *n;
2751 int ret;
2752
2753 if (!old) {
2754 *new = NULL;
2755 return 0;
2756 }
2757
2758 *new = malloc(sizeof(struct list_head));
2759 if (!*new)
2760 return -ENOMEM;
2761 INIT_LIST_HEAD(*new);
2762
2763 list_for_each_entry (term, old, list) {
2764 ret = parse_events_term__clone(&n, term);
2765 if (ret)
2766 return ret;
2767 list_add_tail(&n->list, *new);
2768 }
2769 return 0;
2770}
2771
2772void parse_events_terms__purge(struct list_head *terms)
2773{
2774 struct parse_events_term *term, *h;
2775
2776 list_for_each_entry_safe(term, h, terms, list) {
2777 if (term->array.nr_ranges)
2778 zfree(&term->array.ranges);
2779 list_del_init(&term->list);
2780 free(term);
2781 }
2782}
2783
2784void parse_events_terms__delete(struct list_head *terms)
2785{
2786 if (!terms)
2787 return;
2788 parse_events_terms__purge(terms);
2789 free(terms);
2790}
2791
2792void parse_events__clear_array(struct parse_events_array *a)
2793{
2794 zfree(&a->ranges);
2795}
2796
2797void parse_events_evlist_error(struct parse_events_state *parse_state,
2798 int idx, const char *str)
2799{
2800 struct parse_events_error *err = parse_state->error;
2801
2802 if (!err)
2803 return;
2804 err->idx = idx;
2805 err->str = strdup(str);
2806 WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2807}
2808
2809static void config_terms_list(char *buf, size_t buf_sz)
2810{
2811 int i;
2812 bool first = true;
2813
2814 buf[0] = '\0';
2815 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2816 const char *name = config_term_names[i];
2817
2818 if (!config_term_avail(i, NULL))
2819 continue;
2820 if (!name)
2821 continue;
2822 if (name[0] == '<')
2823 continue;
2824
2825 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2826 return;
2827
2828 if (!first)
2829 strcat(buf, ",");
2830 else
2831 first = false;
2832 strcat(buf, name);
2833 }
2834}
2835
2836/*
2837 * Return string contains valid config terms of an event.
2838 * @additional_terms: For terms such as PMU sysfs terms.
2839 */
2840char *parse_events_formats_error_string(char *additional_terms)
2841{
2842 char *str;
2843 /* "no-overwrite" is the longest name */
2844 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2845 (sizeof("no-overwrite") - 1)];
2846
2847 config_terms_list(static_terms, sizeof(static_terms));
2848 /* valid terms */
2849 if (additional_terms) {
2850 if (asprintf(&str, "valid terms: %s,%s",
2851 additional_terms, static_terms) < 0)
2852 goto fail;
2853 } else {
2854 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2855 goto fail;
2856 }
2857 return str;
2858
2859fail:
2860 return NULL;
2861}