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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/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}
1#include <linux/hw_breakpoint.h>
2#include <linux/err.h>
3#include "util.h"
4#include "../perf.h"
5#include "evlist.h"
6#include "evsel.h"
7#include <subcmd/parse-options.h>
8#include "parse-events.h"
9#include <subcmd/exec-cmd.h>
10#include "string.h"
11#include "symbol.h"
12#include "cache.h"
13#include "header.h"
14#include "bpf-loader.h"
15#include "debug.h"
16#include <api/fs/tracing_path.h>
17#include "parse-events-bison.h"
18#define YY_EXTRA_TYPE int
19#include "parse-events-flex.h"
20#include "pmu.h"
21#include "thread_map.h"
22#include "cpumap.h"
23#include "asm/bug.h"
24
25#define MAX_NAME_LEN 100
26
27#ifdef PARSER_DEBUG
28extern int parse_events_debug;
29#endif
30int parse_events_parse(void *data, void *scanner);
31static int get_config_terms(struct list_head *head_config,
32 struct list_head *head_terms __maybe_unused);
33
34static struct perf_pmu_event_symbol *perf_pmu_events_list;
35/*
36 * The variable indicates the number of supported pmu event symbols.
37 * 0 means not initialized and ready to init
38 * -1 means failed to init, don't try anymore
39 * >0 is the number of supported pmu event symbols
40 */
41static int perf_pmu_events_list_num;
42
43struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
44 [PERF_COUNT_HW_CPU_CYCLES] = {
45 .symbol = "cpu-cycles",
46 .alias = "cycles",
47 },
48 [PERF_COUNT_HW_INSTRUCTIONS] = {
49 .symbol = "instructions",
50 .alias = "",
51 },
52 [PERF_COUNT_HW_CACHE_REFERENCES] = {
53 .symbol = "cache-references",
54 .alias = "",
55 },
56 [PERF_COUNT_HW_CACHE_MISSES] = {
57 .symbol = "cache-misses",
58 .alias = "",
59 },
60 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
61 .symbol = "branch-instructions",
62 .alias = "branches",
63 },
64 [PERF_COUNT_HW_BRANCH_MISSES] = {
65 .symbol = "branch-misses",
66 .alias = "",
67 },
68 [PERF_COUNT_HW_BUS_CYCLES] = {
69 .symbol = "bus-cycles",
70 .alias = "",
71 },
72 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
73 .symbol = "stalled-cycles-frontend",
74 .alias = "idle-cycles-frontend",
75 },
76 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
77 .symbol = "stalled-cycles-backend",
78 .alias = "idle-cycles-backend",
79 },
80 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
81 .symbol = "ref-cycles",
82 .alias = "",
83 },
84};
85
86struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
87 [PERF_COUNT_SW_CPU_CLOCK] = {
88 .symbol = "cpu-clock",
89 .alias = "",
90 },
91 [PERF_COUNT_SW_TASK_CLOCK] = {
92 .symbol = "task-clock",
93 .alias = "",
94 },
95 [PERF_COUNT_SW_PAGE_FAULTS] = {
96 .symbol = "page-faults",
97 .alias = "faults",
98 },
99 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
100 .symbol = "context-switches",
101 .alias = "cs",
102 },
103 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
104 .symbol = "cpu-migrations",
105 .alias = "migrations",
106 },
107 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
108 .symbol = "minor-faults",
109 .alias = "",
110 },
111 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
112 .symbol = "major-faults",
113 .alias = "",
114 },
115 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
116 .symbol = "alignment-faults",
117 .alias = "",
118 },
119 [PERF_COUNT_SW_EMULATION_FAULTS] = {
120 .symbol = "emulation-faults",
121 .alias = "",
122 },
123 [PERF_COUNT_SW_DUMMY] = {
124 .symbol = "dummy",
125 .alias = "",
126 },
127 [PERF_COUNT_SW_BPF_OUTPUT] = {
128 .symbol = "bpf-output",
129 .alias = "",
130 },
131};
132
133#define __PERF_EVENT_FIELD(config, name) \
134 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
135
136#define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
137#define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
138#define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
139#define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
140
141#define for_each_subsystem(sys_dir, sys_dirent) \
142 while ((sys_dirent = readdir(sys_dir)) != NULL) \
143 if (sys_dirent->d_type == DT_DIR && \
144 (strcmp(sys_dirent->d_name, ".")) && \
145 (strcmp(sys_dirent->d_name, "..")))
146
147static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
148{
149 char evt_path[MAXPATHLEN];
150 int fd;
151
152 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", tracing_events_path,
153 sys_dir->d_name, evt_dir->d_name);
154 fd = open(evt_path, O_RDONLY);
155 if (fd < 0)
156 return -EINVAL;
157 close(fd);
158
159 return 0;
160}
161
162#define for_each_event(sys_dirent, evt_dir, evt_dirent) \
163 while ((evt_dirent = readdir(evt_dir)) != NULL) \
164 if (evt_dirent->d_type == DT_DIR && \
165 (strcmp(evt_dirent->d_name, ".")) && \
166 (strcmp(evt_dirent->d_name, "..")) && \
167 (!tp_event_has_id(sys_dirent, evt_dirent)))
168
169#define MAX_EVENT_LENGTH 512
170
171
172struct tracepoint_path *tracepoint_id_to_path(u64 config)
173{
174 struct tracepoint_path *path = NULL;
175 DIR *sys_dir, *evt_dir;
176 struct dirent *sys_dirent, *evt_dirent;
177 char id_buf[24];
178 int fd;
179 u64 id;
180 char evt_path[MAXPATHLEN];
181 char dir_path[MAXPATHLEN];
182
183 sys_dir = opendir(tracing_events_path);
184 if (!sys_dir)
185 return NULL;
186
187 for_each_subsystem(sys_dir, sys_dirent) {
188
189 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
190 sys_dirent->d_name);
191 evt_dir = opendir(dir_path);
192 if (!evt_dir)
193 continue;
194
195 for_each_event(sys_dirent, evt_dir, evt_dirent) {
196
197 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
198 evt_dirent->d_name);
199 fd = open(evt_path, O_RDONLY);
200 if (fd < 0)
201 continue;
202 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
203 close(fd);
204 continue;
205 }
206 close(fd);
207 id = atoll(id_buf);
208 if (id == config) {
209 closedir(evt_dir);
210 closedir(sys_dir);
211 path = zalloc(sizeof(*path));
212 path->system = malloc(MAX_EVENT_LENGTH);
213 if (!path->system) {
214 free(path);
215 return NULL;
216 }
217 path->name = malloc(MAX_EVENT_LENGTH);
218 if (!path->name) {
219 zfree(&path->system);
220 free(path);
221 return NULL;
222 }
223 strncpy(path->system, sys_dirent->d_name,
224 MAX_EVENT_LENGTH);
225 strncpy(path->name, evt_dirent->d_name,
226 MAX_EVENT_LENGTH);
227 return path;
228 }
229 }
230 closedir(evt_dir);
231 }
232
233 closedir(sys_dir);
234 return NULL;
235}
236
237struct tracepoint_path *tracepoint_name_to_path(const char *name)
238{
239 struct tracepoint_path *path = zalloc(sizeof(*path));
240 char *str = strchr(name, ':');
241
242 if (path == NULL || str == NULL) {
243 free(path);
244 return NULL;
245 }
246
247 path->system = strndup(name, str - name);
248 path->name = strdup(str+1);
249
250 if (path->system == NULL || path->name == NULL) {
251 zfree(&path->system);
252 zfree(&path->name);
253 free(path);
254 path = NULL;
255 }
256
257 return path;
258}
259
260const char *event_type(int type)
261{
262 switch (type) {
263 case PERF_TYPE_HARDWARE:
264 return "hardware";
265
266 case PERF_TYPE_SOFTWARE:
267 return "software";
268
269 case PERF_TYPE_TRACEPOINT:
270 return "tracepoint";
271
272 case PERF_TYPE_HW_CACHE:
273 return "hardware-cache";
274
275 default:
276 break;
277 }
278
279 return "unknown";
280}
281
282static int parse_events__is_name_term(struct parse_events_term *term)
283{
284 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
285}
286
287static char *get_config_name(struct list_head *head_terms)
288{
289 struct parse_events_term *term;
290
291 if (!head_terms)
292 return NULL;
293
294 list_for_each_entry(term, head_terms, list)
295 if (parse_events__is_name_term(term))
296 return term->val.str;
297
298 return NULL;
299}
300
301static struct perf_evsel *
302__add_event(struct list_head *list, int *idx,
303 struct perf_event_attr *attr,
304 char *name, struct cpu_map *cpus,
305 struct list_head *config_terms)
306{
307 struct perf_evsel *evsel;
308
309 event_attr_init(attr);
310
311 evsel = perf_evsel__new_idx(attr, (*idx)++);
312 if (!evsel)
313 return NULL;
314
315 evsel->cpus = cpu_map__get(cpus);
316 evsel->own_cpus = cpu_map__get(cpus);
317
318 if (name)
319 evsel->name = strdup(name);
320
321 if (config_terms)
322 list_splice(config_terms, &evsel->config_terms);
323
324 list_add_tail(&evsel->node, list);
325 return evsel;
326}
327
328static int add_event(struct list_head *list, int *idx,
329 struct perf_event_attr *attr, char *name,
330 struct list_head *config_terms)
331{
332 return __add_event(list, idx, attr, name, NULL, config_terms) ? 0 : -ENOMEM;
333}
334
335static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
336{
337 int i, j;
338 int n, longest = -1;
339
340 for (i = 0; i < size; i++) {
341 for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
342 n = strlen(names[i][j]);
343 if (n > longest && !strncasecmp(str, names[i][j], n))
344 longest = n;
345 }
346 if (longest > 0)
347 return i;
348 }
349
350 return -1;
351}
352
353typedef int config_term_func_t(struct perf_event_attr *attr,
354 struct parse_events_term *term,
355 struct parse_events_error *err);
356static int config_term_common(struct perf_event_attr *attr,
357 struct parse_events_term *term,
358 struct parse_events_error *err);
359static int config_attr(struct perf_event_attr *attr,
360 struct list_head *head,
361 struct parse_events_error *err,
362 config_term_func_t config_term);
363
364int parse_events_add_cache(struct list_head *list, int *idx,
365 char *type, char *op_result1, char *op_result2,
366 struct parse_events_error *err,
367 struct list_head *head_config)
368{
369 struct perf_event_attr attr;
370 LIST_HEAD(config_terms);
371 char name[MAX_NAME_LEN], *config_name;
372 int cache_type = -1, cache_op = -1, cache_result = -1;
373 char *op_result[2] = { op_result1, op_result2 };
374 int i, n;
375
376 /*
377 * No fallback - if we cannot get a clear cache type
378 * then bail out:
379 */
380 cache_type = parse_aliases(type, perf_evsel__hw_cache,
381 PERF_COUNT_HW_CACHE_MAX);
382 if (cache_type == -1)
383 return -EINVAL;
384
385 config_name = get_config_name(head_config);
386 n = snprintf(name, MAX_NAME_LEN, "%s", type);
387
388 for (i = 0; (i < 2) && (op_result[i]); i++) {
389 char *str = op_result[i];
390
391 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
392
393 if (cache_op == -1) {
394 cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
395 PERF_COUNT_HW_CACHE_OP_MAX);
396 if (cache_op >= 0) {
397 if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
398 return -EINVAL;
399 continue;
400 }
401 }
402
403 if (cache_result == -1) {
404 cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
405 PERF_COUNT_HW_CACHE_RESULT_MAX);
406 if (cache_result >= 0)
407 continue;
408 }
409 }
410
411 /*
412 * Fall back to reads:
413 */
414 if (cache_op == -1)
415 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
416
417 /*
418 * Fall back to accesses:
419 */
420 if (cache_result == -1)
421 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
422
423 memset(&attr, 0, sizeof(attr));
424 attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
425 attr.type = PERF_TYPE_HW_CACHE;
426
427 if (head_config) {
428 if (config_attr(&attr, head_config, err,
429 config_term_common))
430 return -EINVAL;
431
432 if (get_config_terms(head_config, &config_terms))
433 return -ENOMEM;
434 }
435 return add_event(list, idx, &attr, config_name ? : name, &config_terms);
436}
437
438static void tracepoint_error(struct parse_events_error *e, int err,
439 char *sys, char *name)
440{
441 char help[BUFSIZ];
442
443 if (!e)
444 return;
445
446 /*
447 * We get error directly from syscall errno ( > 0),
448 * or from encoded pointer's error ( < 0).
449 */
450 err = abs(err);
451
452 switch (err) {
453 case EACCES:
454 e->str = strdup("can't access trace events");
455 break;
456 case ENOENT:
457 e->str = strdup("unknown tracepoint");
458 break;
459 default:
460 e->str = strdup("failed to add tracepoint");
461 break;
462 }
463
464 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
465 e->help = strdup(help);
466}
467
468static int add_tracepoint(struct list_head *list, int *idx,
469 char *sys_name, char *evt_name,
470 struct parse_events_error *err,
471 struct list_head *head_config)
472{
473 struct perf_evsel *evsel;
474
475 evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
476 if (IS_ERR(evsel)) {
477 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
478 return PTR_ERR(evsel);
479 }
480
481 if (head_config) {
482 LIST_HEAD(config_terms);
483
484 if (get_config_terms(head_config, &config_terms))
485 return -ENOMEM;
486 list_splice(&config_terms, &evsel->config_terms);
487 }
488
489 list_add_tail(&evsel->node, list);
490 return 0;
491}
492
493static int add_tracepoint_multi_event(struct list_head *list, int *idx,
494 char *sys_name, char *evt_name,
495 struct parse_events_error *err,
496 struct list_head *head_config)
497{
498 char evt_path[MAXPATHLEN];
499 struct dirent *evt_ent;
500 DIR *evt_dir;
501 int ret = 0, found = 0;
502
503 snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
504 evt_dir = opendir(evt_path);
505 if (!evt_dir) {
506 tracepoint_error(err, errno, sys_name, evt_name);
507 return -1;
508 }
509
510 while (!ret && (evt_ent = readdir(evt_dir))) {
511 if (!strcmp(evt_ent->d_name, ".")
512 || !strcmp(evt_ent->d_name, "..")
513 || !strcmp(evt_ent->d_name, "enable")
514 || !strcmp(evt_ent->d_name, "filter"))
515 continue;
516
517 if (!strglobmatch(evt_ent->d_name, evt_name))
518 continue;
519
520 found++;
521
522 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
523 err, head_config);
524 }
525
526 if (!found) {
527 tracepoint_error(err, ENOENT, sys_name, evt_name);
528 ret = -1;
529 }
530
531 closedir(evt_dir);
532 return ret;
533}
534
535static int add_tracepoint_event(struct list_head *list, int *idx,
536 char *sys_name, char *evt_name,
537 struct parse_events_error *err,
538 struct list_head *head_config)
539{
540 return strpbrk(evt_name, "*?") ?
541 add_tracepoint_multi_event(list, idx, sys_name, evt_name,
542 err, head_config) :
543 add_tracepoint(list, idx, sys_name, evt_name,
544 err, head_config);
545}
546
547static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
548 char *sys_name, char *evt_name,
549 struct parse_events_error *err,
550 struct list_head *head_config)
551{
552 struct dirent *events_ent;
553 DIR *events_dir;
554 int ret = 0;
555
556 events_dir = opendir(tracing_events_path);
557 if (!events_dir) {
558 tracepoint_error(err, errno, sys_name, evt_name);
559 return -1;
560 }
561
562 while (!ret && (events_ent = readdir(events_dir))) {
563 if (!strcmp(events_ent->d_name, ".")
564 || !strcmp(events_ent->d_name, "..")
565 || !strcmp(events_ent->d_name, "enable")
566 || !strcmp(events_ent->d_name, "header_event")
567 || !strcmp(events_ent->d_name, "header_page"))
568 continue;
569
570 if (!strglobmatch(events_ent->d_name, sys_name))
571 continue;
572
573 ret = add_tracepoint_event(list, idx, events_ent->d_name,
574 evt_name, err, head_config);
575 }
576
577 closedir(events_dir);
578 return ret;
579}
580
581struct __add_bpf_event_param {
582 struct parse_events_evlist *data;
583 struct list_head *list;
584 struct list_head *head_config;
585};
586
587static int add_bpf_event(struct probe_trace_event *tev, int fd,
588 void *_param)
589{
590 LIST_HEAD(new_evsels);
591 struct __add_bpf_event_param *param = _param;
592 struct parse_events_evlist *evlist = param->data;
593 struct list_head *list = param->list;
594 struct perf_evsel *pos;
595 int err;
596
597 pr_debug("add bpf event %s:%s and attach bpf program %d\n",
598 tev->group, tev->event, fd);
599
600 err = parse_events_add_tracepoint(&new_evsels, &evlist->idx, tev->group,
601 tev->event, evlist->error,
602 param->head_config);
603 if (err) {
604 struct perf_evsel *evsel, *tmp;
605
606 pr_debug("Failed to add BPF event %s:%s\n",
607 tev->group, tev->event);
608 list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
609 list_del(&evsel->node);
610 perf_evsel__delete(evsel);
611 }
612 return err;
613 }
614 pr_debug("adding %s:%s\n", tev->group, tev->event);
615
616 list_for_each_entry(pos, &new_evsels, node) {
617 pr_debug("adding %s:%s to %p\n",
618 tev->group, tev->event, pos);
619 pos->bpf_fd = fd;
620 }
621 list_splice(&new_evsels, list);
622 return 0;
623}
624
625int parse_events_load_bpf_obj(struct parse_events_evlist *data,
626 struct list_head *list,
627 struct bpf_object *obj,
628 struct list_head *head_config)
629{
630 int err;
631 char errbuf[BUFSIZ];
632 struct __add_bpf_event_param param = {data, list, head_config};
633 static bool registered_unprobe_atexit = false;
634
635 if (IS_ERR(obj) || !obj) {
636 snprintf(errbuf, sizeof(errbuf),
637 "Internal error: load bpf obj with NULL");
638 err = -EINVAL;
639 goto errout;
640 }
641
642 /*
643 * Register atexit handler before calling bpf__probe() so
644 * bpf__probe() don't need to unprobe probe points its already
645 * created when failure.
646 */
647 if (!registered_unprobe_atexit) {
648 atexit(bpf__clear);
649 registered_unprobe_atexit = true;
650 }
651
652 err = bpf__probe(obj);
653 if (err) {
654 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
655 goto errout;
656 }
657
658 err = bpf__load(obj);
659 if (err) {
660 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
661 goto errout;
662 }
663
664 err = bpf__foreach_tev(obj, add_bpf_event, ¶m);
665 if (err) {
666 snprintf(errbuf, sizeof(errbuf),
667 "Attach events in BPF object failed");
668 goto errout;
669 }
670
671 return 0;
672errout:
673 data->error->help = strdup("(add -v to see detail)");
674 data->error->str = strdup(errbuf);
675 return err;
676}
677
678static int
679parse_events_config_bpf(struct parse_events_evlist *data,
680 struct bpf_object *obj,
681 struct list_head *head_config)
682{
683 struct parse_events_term *term;
684 int error_pos;
685
686 if (!head_config || list_empty(head_config))
687 return 0;
688
689 list_for_each_entry(term, head_config, list) {
690 char errbuf[BUFSIZ];
691 int err;
692
693 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
694 snprintf(errbuf, sizeof(errbuf),
695 "Invalid config term for BPF object");
696 errbuf[BUFSIZ - 1] = '\0';
697
698 data->error->idx = term->err_term;
699 data->error->str = strdup(errbuf);
700 return -EINVAL;
701 }
702
703 err = bpf__config_obj(obj, term, data->evlist, &error_pos);
704 if (err) {
705 bpf__strerror_config_obj(obj, term, data->evlist,
706 &error_pos, err, errbuf,
707 sizeof(errbuf));
708 data->error->help = strdup(
709"Hint:\tValid config terms:\n"
710" \tmap:[<arraymap>].value<indices>=[value]\n"
711" \tmap:[<eventmap>].event<indices>=[event]\n"
712"\n"
713" \twhere <indices> is something like [0,3...5] or [all]\n"
714" \t(add -v to see detail)");
715 data->error->str = strdup(errbuf);
716 if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
717 data->error->idx = term->err_val;
718 else
719 data->error->idx = term->err_term + error_pos;
720 return err;
721 }
722 }
723 return 0;
724}
725
726/*
727 * Split config terms:
728 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
729 * 'call-graph=fp' is 'evt config', should be applied to each
730 * events in bpf.c.
731 * 'map:array.value[0]=1' is 'obj config', should be processed
732 * with parse_events_config_bpf.
733 *
734 * Move object config terms from the first list to obj_head_config.
735 */
736static void
737split_bpf_config_terms(struct list_head *evt_head_config,
738 struct list_head *obj_head_config)
739{
740 struct parse_events_term *term, *temp;
741
742 /*
743 * Currectly, all possible user config term
744 * belong to bpf object. parse_events__is_hardcoded_term()
745 * happends to be a good flag.
746 *
747 * See parse_events_config_bpf() and
748 * config_term_tracepoint().
749 */
750 list_for_each_entry_safe(term, temp, evt_head_config, list)
751 if (!parse_events__is_hardcoded_term(term))
752 list_move_tail(&term->list, obj_head_config);
753}
754
755int parse_events_load_bpf(struct parse_events_evlist *data,
756 struct list_head *list,
757 char *bpf_file_name,
758 bool source,
759 struct list_head *head_config)
760{
761 int err;
762 struct bpf_object *obj;
763 LIST_HEAD(obj_head_config);
764
765 if (head_config)
766 split_bpf_config_terms(head_config, &obj_head_config);
767
768 obj = bpf__prepare_load(bpf_file_name, source);
769 if (IS_ERR(obj)) {
770 char errbuf[BUFSIZ];
771
772 err = PTR_ERR(obj);
773
774 if (err == -ENOTSUP)
775 snprintf(errbuf, sizeof(errbuf),
776 "BPF support is not compiled");
777 else
778 bpf__strerror_prepare_load(bpf_file_name,
779 source,
780 -err, errbuf,
781 sizeof(errbuf));
782
783 data->error->help = strdup("(add -v to see detail)");
784 data->error->str = strdup(errbuf);
785 return err;
786 }
787
788 err = parse_events_load_bpf_obj(data, list, obj, head_config);
789 if (err)
790 return err;
791 err = parse_events_config_bpf(data, obj, &obj_head_config);
792
793 /*
794 * Caller doesn't know anything about obj_head_config,
795 * so combine them together again before returnning.
796 */
797 if (head_config)
798 list_splice_tail(&obj_head_config, head_config);
799 return err;
800}
801
802static int
803parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
804{
805 int i;
806
807 for (i = 0; i < 3; i++) {
808 if (!type || !type[i])
809 break;
810
811#define CHECK_SET_TYPE(bit) \
812do { \
813 if (attr->bp_type & bit) \
814 return -EINVAL; \
815 else \
816 attr->bp_type |= bit; \
817} while (0)
818
819 switch (type[i]) {
820 case 'r':
821 CHECK_SET_TYPE(HW_BREAKPOINT_R);
822 break;
823 case 'w':
824 CHECK_SET_TYPE(HW_BREAKPOINT_W);
825 break;
826 case 'x':
827 CHECK_SET_TYPE(HW_BREAKPOINT_X);
828 break;
829 default:
830 return -EINVAL;
831 }
832 }
833
834#undef CHECK_SET_TYPE
835
836 if (!attr->bp_type) /* Default */
837 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
838
839 return 0;
840}
841
842int parse_events_add_breakpoint(struct list_head *list, int *idx,
843 void *ptr, char *type, u64 len)
844{
845 struct perf_event_attr attr;
846
847 memset(&attr, 0, sizeof(attr));
848 attr.bp_addr = (unsigned long) ptr;
849
850 if (parse_breakpoint_type(type, &attr))
851 return -EINVAL;
852
853 /* Provide some defaults if len is not specified */
854 if (!len) {
855 if (attr.bp_type == HW_BREAKPOINT_X)
856 len = sizeof(long);
857 else
858 len = HW_BREAKPOINT_LEN_4;
859 }
860
861 attr.bp_len = len;
862
863 attr.type = PERF_TYPE_BREAKPOINT;
864 attr.sample_period = 1;
865
866 return add_event(list, idx, &attr, NULL, NULL);
867}
868
869static int check_type_val(struct parse_events_term *term,
870 struct parse_events_error *err,
871 int type)
872{
873 if (type == term->type_val)
874 return 0;
875
876 if (err) {
877 err->idx = term->err_val;
878 if (type == PARSE_EVENTS__TERM_TYPE_NUM)
879 err->str = strdup("expected numeric value");
880 else
881 err->str = strdup("expected string value");
882 }
883 return -EINVAL;
884}
885
886/*
887 * Update according to parse-events.l
888 */
889static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
890 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>",
891 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config",
892 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1",
893 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2",
894 [PARSE_EVENTS__TERM_TYPE_NAME] = "name",
895 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period",
896 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq",
897 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type",
898 [PARSE_EVENTS__TERM_TYPE_TIME] = "time",
899 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph",
900 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size",
901 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit",
902 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit",
903};
904
905static bool config_term_shrinked;
906
907static bool
908config_term_avail(int term_type, struct parse_events_error *err)
909{
910 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
911 err->str = strdup("Invalid term_type");
912 return false;
913 }
914 if (!config_term_shrinked)
915 return true;
916
917 switch (term_type) {
918 case PARSE_EVENTS__TERM_TYPE_CONFIG:
919 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
920 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
921 case PARSE_EVENTS__TERM_TYPE_NAME:
922 return true;
923 default:
924 if (!err)
925 return false;
926
927 /* term_type is validated so indexing is safe */
928 if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
929 config_term_names[term_type]) < 0)
930 err->str = NULL;
931 return false;
932 }
933}
934
935void parse_events__shrink_config_terms(void)
936{
937 config_term_shrinked = true;
938}
939
940static int config_term_common(struct perf_event_attr *attr,
941 struct parse_events_term *term,
942 struct parse_events_error *err)
943{
944#define CHECK_TYPE_VAL(type) \
945do { \
946 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
947 return -EINVAL; \
948} while (0)
949
950 switch (term->type_term) {
951 case PARSE_EVENTS__TERM_TYPE_CONFIG:
952 CHECK_TYPE_VAL(NUM);
953 attr->config = term->val.num;
954 break;
955 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
956 CHECK_TYPE_VAL(NUM);
957 attr->config1 = term->val.num;
958 break;
959 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
960 CHECK_TYPE_VAL(NUM);
961 attr->config2 = term->val.num;
962 break;
963 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
964 CHECK_TYPE_VAL(NUM);
965 break;
966 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
967 CHECK_TYPE_VAL(NUM);
968 break;
969 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
970 /*
971 * TODO uncomment when the field is available
972 * attr->branch_sample_type = term->val.num;
973 */
974 break;
975 case PARSE_EVENTS__TERM_TYPE_TIME:
976 CHECK_TYPE_VAL(NUM);
977 if (term->val.num > 1) {
978 err->str = strdup("expected 0 or 1");
979 err->idx = term->err_val;
980 return -EINVAL;
981 }
982 break;
983 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
984 CHECK_TYPE_VAL(STR);
985 break;
986 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
987 CHECK_TYPE_VAL(NUM);
988 break;
989 case PARSE_EVENTS__TERM_TYPE_INHERIT:
990 CHECK_TYPE_VAL(NUM);
991 break;
992 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
993 CHECK_TYPE_VAL(NUM);
994 break;
995 case PARSE_EVENTS__TERM_TYPE_NAME:
996 CHECK_TYPE_VAL(STR);
997 break;
998 default:
999 err->str = strdup("unknown term");
1000 err->idx = term->err_term;
1001 err->help = parse_events_formats_error_string(NULL);
1002 return -EINVAL;
1003 }
1004
1005 /*
1006 * Check term availbility after basic checking so
1007 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1008 *
1009 * If check availbility at the entry of this function,
1010 * user will see "'<sysfs term>' is not usable in 'perf stat'"
1011 * if an invalid config term is provided for legacy events
1012 * (for example, instructions/badterm/...), which is confusing.
1013 */
1014 if (!config_term_avail(term->type_term, err))
1015 return -EINVAL;
1016 return 0;
1017#undef CHECK_TYPE_VAL
1018}
1019
1020static int config_term_pmu(struct perf_event_attr *attr,
1021 struct parse_events_term *term,
1022 struct parse_events_error *err)
1023{
1024 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER)
1025 /*
1026 * Always succeed for sysfs terms, as we dont know
1027 * at this point what type they need to have.
1028 */
1029 return 0;
1030 else
1031 return config_term_common(attr, term, err);
1032}
1033
1034static int config_term_tracepoint(struct perf_event_attr *attr,
1035 struct parse_events_term *term,
1036 struct parse_events_error *err)
1037{
1038 switch (term->type_term) {
1039 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1040 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1041 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1042 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1043 return config_term_common(attr, term, err);
1044 default:
1045 if (err) {
1046 err->idx = term->err_term;
1047 err->str = strdup("unknown term");
1048 err->help = strdup("valid terms: call-graph,stack-size\n");
1049 }
1050 return -EINVAL;
1051 }
1052
1053 return 0;
1054}
1055
1056static int config_attr(struct perf_event_attr *attr,
1057 struct list_head *head,
1058 struct parse_events_error *err,
1059 config_term_func_t config_term)
1060{
1061 struct parse_events_term *term;
1062
1063 list_for_each_entry(term, head, list)
1064 if (config_term(attr, term, err))
1065 return -EINVAL;
1066
1067 return 0;
1068}
1069
1070static int get_config_terms(struct list_head *head_config,
1071 struct list_head *head_terms __maybe_unused)
1072{
1073#define ADD_CONFIG_TERM(__type, __name, __val) \
1074do { \
1075 struct perf_evsel_config_term *__t; \
1076 \
1077 __t = zalloc(sizeof(*__t)); \
1078 if (!__t) \
1079 return -ENOMEM; \
1080 \
1081 INIT_LIST_HEAD(&__t->list); \
1082 __t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
1083 __t->val.__name = __val; \
1084 list_add_tail(&__t->list, head_terms); \
1085} while (0)
1086
1087 struct parse_events_term *term;
1088
1089 list_for_each_entry(term, head_config, list) {
1090 switch (term->type_term) {
1091 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1092 ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1093 break;
1094 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1095 ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1096 break;
1097 case PARSE_EVENTS__TERM_TYPE_TIME:
1098 ADD_CONFIG_TERM(TIME, time, term->val.num);
1099 break;
1100 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1101 ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1102 break;
1103 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1104 ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1105 break;
1106 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1107 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1108 break;
1109 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1110 ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1111 break;
1112 default:
1113 break;
1114 }
1115 }
1116#undef ADD_EVSEL_CONFIG
1117 return 0;
1118}
1119
1120int parse_events_add_tracepoint(struct list_head *list, int *idx,
1121 char *sys, char *event,
1122 struct parse_events_error *err,
1123 struct list_head *head_config)
1124{
1125 if (head_config) {
1126 struct perf_event_attr attr;
1127
1128 if (config_attr(&attr, head_config, err,
1129 config_term_tracepoint))
1130 return -EINVAL;
1131 }
1132
1133 if (strpbrk(sys, "*?"))
1134 return add_tracepoint_multi_sys(list, idx, sys, event,
1135 err, head_config);
1136 else
1137 return add_tracepoint_event(list, idx, sys, event,
1138 err, head_config);
1139}
1140
1141int parse_events_add_numeric(struct parse_events_evlist *data,
1142 struct list_head *list,
1143 u32 type, u64 config,
1144 struct list_head *head_config)
1145{
1146 struct perf_event_attr attr;
1147 LIST_HEAD(config_terms);
1148
1149 memset(&attr, 0, sizeof(attr));
1150 attr.type = type;
1151 attr.config = config;
1152
1153 if (head_config) {
1154 if (config_attr(&attr, head_config, data->error,
1155 config_term_common))
1156 return -EINVAL;
1157
1158 if (get_config_terms(head_config, &config_terms))
1159 return -ENOMEM;
1160 }
1161
1162 return add_event(list, &data->idx, &attr,
1163 get_config_name(head_config), &config_terms);
1164}
1165
1166int parse_events_add_pmu(struct parse_events_evlist *data,
1167 struct list_head *list, char *name,
1168 struct list_head *head_config)
1169{
1170 struct perf_event_attr attr;
1171 struct perf_pmu_info info;
1172 struct perf_pmu *pmu;
1173 struct perf_evsel *evsel;
1174 LIST_HEAD(config_terms);
1175
1176 pmu = perf_pmu__find(name);
1177 if (!pmu)
1178 return -EINVAL;
1179
1180 if (pmu->default_config) {
1181 memcpy(&attr, pmu->default_config,
1182 sizeof(struct perf_event_attr));
1183 } else {
1184 memset(&attr, 0, sizeof(attr));
1185 }
1186
1187 if (!head_config) {
1188 attr.type = pmu->type;
1189 evsel = __add_event(list, &data->idx, &attr, NULL, pmu->cpus, NULL);
1190 return evsel ? 0 : -ENOMEM;
1191 }
1192
1193 if (perf_pmu__check_alias(pmu, head_config, &info))
1194 return -EINVAL;
1195
1196 /*
1197 * Configure hardcoded terms first, no need to check
1198 * return value when called with fail == 0 ;)
1199 */
1200 if (config_attr(&attr, head_config, data->error, config_term_pmu))
1201 return -EINVAL;
1202
1203 if (get_config_terms(head_config, &config_terms))
1204 return -ENOMEM;
1205
1206 if (perf_pmu__config(pmu, &attr, head_config, data->error))
1207 return -EINVAL;
1208
1209 evsel = __add_event(list, &data->idx, &attr,
1210 get_config_name(head_config), pmu->cpus,
1211 &config_terms);
1212 if (evsel) {
1213 evsel->unit = info.unit;
1214 evsel->scale = info.scale;
1215 evsel->per_pkg = info.per_pkg;
1216 evsel->snapshot = info.snapshot;
1217 }
1218
1219 return evsel ? 0 : -ENOMEM;
1220}
1221
1222int parse_events__modifier_group(struct list_head *list,
1223 char *event_mod)
1224{
1225 return parse_events__modifier_event(list, event_mod, true);
1226}
1227
1228void parse_events__set_leader(char *name, struct list_head *list)
1229{
1230 struct perf_evsel *leader;
1231
1232 if (list_empty(list)) {
1233 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1234 return;
1235 }
1236
1237 __perf_evlist__set_leader(list);
1238 leader = list_entry(list->next, struct perf_evsel, node);
1239 leader->group_name = name ? strdup(name) : NULL;
1240}
1241
1242/* list_event is assumed to point to malloc'ed memory */
1243void parse_events_update_lists(struct list_head *list_event,
1244 struct list_head *list_all)
1245{
1246 /*
1247 * Called for single event definition. Update the
1248 * 'all event' list, and reinit the 'single event'
1249 * list, for next event definition.
1250 */
1251 list_splice_tail(list_event, list_all);
1252 free(list_event);
1253}
1254
1255struct event_modifier {
1256 int eu;
1257 int ek;
1258 int eh;
1259 int eH;
1260 int eG;
1261 int eI;
1262 int precise;
1263 int precise_max;
1264 int exclude_GH;
1265 int sample_read;
1266 int pinned;
1267};
1268
1269static int get_event_modifier(struct event_modifier *mod, char *str,
1270 struct perf_evsel *evsel)
1271{
1272 int eu = evsel ? evsel->attr.exclude_user : 0;
1273 int ek = evsel ? evsel->attr.exclude_kernel : 0;
1274 int eh = evsel ? evsel->attr.exclude_hv : 0;
1275 int eH = evsel ? evsel->attr.exclude_host : 0;
1276 int eG = evsel ? evsel->attr.exclude_guest : 0;
1277 int eI = evsel ? evsel->attr.exclude_idle : 0;
1278 int precise = evsel ? evsel->attr.precise_ip : 0;
1279 int precise_max = 0;
1280 int sample_read = 0;
1281 int pinned = evsel ? evsel->attr.pinned : 0;
1282
1283 int exclude = eu | ek | eh;
1284 int exclude_GH = evsel ? evsel->exclude_GH : 0;
1285
1286 memset(mod, 0, sizeof(*mod));
1287
1288 while (*str) {
1289 if (*str == 'u') {
1290 if (!exclude)
1291 exclude = eu = ek = eh = 1;
1292 eu = 0;
1293 } else if (*str == 'k') {
1294 if (!exclude)
1295 exclude = eu = ek = eh = 1;
1296 ek = 0;
1297 } else if (*str == 'h') {
1298 if (!exclude)
1299 exclude = eu = ek = eh = 1;
1300 eh = 0;
1301 } else if (*str == 'G') {
1302 if (!exclude_GH)
1303 exclude_GH = eG = eH = 1;
1304 eG = 0;
1305 } else if (*str == 'H') {
1306 if (!exclude_GH)
1307 exclude_GH = eG = eH = 1;
1308 eH = 0;
1309 } else if (*str == 'I') {
1310 eI = 1;
1311 } else if (*str == 'p') {
1312 precise++;
1313 /* use of precise requires exclude_guest */
1314 if (!exclude_GH)
1315 eG = 1;
1316 } else if (*str == 'P') {
1317 precise_max = 1;
1318 } else if (*str == 'S') {
1319 sample_read = 1;
1320 } else if (*str == 'D') {
1321 pinned = 1;
1322 } else
1323 break;
1324
1325 ++str;
1326 }
1327
1328 /*
1329 * precise ip:
1330 *
1331 * 0 - SAMPLE_IP can have arbitrary skid
1332 * 1 - SAMPLE_IP must have constant skid
1333 * 2 - SAMPLE_IP requested to have 0 skid
1334 * 3 - SAMPLE_IP must have 0 skid
1335 *
1336 * See also PERF_RECORD_MISC_EXACT_IP
1337 */
1338 if (precise > 3)
1339 return -EINVAL;
1340
1341 mod->eu = eu;
1342 mod->ek = ek;
1343 mod->eh = eh;
1344 mod->eH = eH;
1345 mod->eG = eG;
1346 mod->eI = eI;
1347 mod->precise = precise;
1348 mod->precise_max = precise_max;
1349 mod->exclude_GH = exclude_GH;
1350 mod->sample_read = sample_read;
1351 mod->pinned = pinned;
1352
1353 return 0;
1354}
1355
1356/*
1357 * Basic modifier sanity check to validate it contains only one
1358 * instance of any modifier (apart from 'p') present.
1359 */
1360static int check_modifier(char *str)
1361{
1362 char *p = str;
1363
1364 /* The sizeof includes 0 byte as well. */
1365 if (strlen(str) > (sizeof("ukhGHpppPSDI") - 1))
1366 return -1;
1367
1368 while (*p) {
1369 if (*p != 'p' && strchr(p + 1, *p))
1370 return -1;
1371 p++;
1372 }
1373
1374 return 0;
1375}
1376
1377int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1378{
1379 struct perf_evsel *evsel;
1380 struct event_modifier mod;
1381
1382 if (str == NULL)
1383 return 0;
1384
1385 if (check_modifier(str))
1386 return -EINVAL;
1387
1388 if (!add && get_event_modifier(&mod, str, NULL))
1389 return -EINVAL;
1390
1391 __evlist__for_each(list, evsel) {
1392 if (add && get_event_modifier(&mod, str, evsel))
1393 return -EINVAL;
1394
1395 evsel->attr.exclude_user = mod.eu;
1396 evsel->attr.exclude_kernel = mod.ek;
1397 evsel->attr.exclude_hv = mod.eh;
1398 evsel->attr.precise_ip = mod.precise;
1399 evsel->attr.exclude_host = mod.eH;
1400 evsel->attr.exclude_guest = mod.eG;
1401 evsel->attr.exclude_idle = mod.eI;
1402 evsel->exclude_GH = mod.exclude_GH;
1403 evsel->sample_read = mod.sample_read;
1404 evsel->precise_max = mod.precise_max;
1405
1406 if (perf_evsel__is_group_leader(evsel))
1407 evsel->attr.pinned = mod.pinned;
1408 }
1409
1410 return 0;
1411}
1412
1413int parse_events_name(struct list_head *list, char *name)
1414{
1415 struct perf_evsel *evsel;
1416
1417 __evlist__for_each(list, evsel) {
1418 if (!evsel->name)
1419 evsel->name = strdup(name);
1420 }
1421
1422 return 0;
1423}
1424
1425static int
1426comp_pmu(const void *p1, const void *p2)
1427{
1428 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1429 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1430
1431 return strcmp(pmu1->symbol, pmu2->symbol);
1432}
1433
1434static void perf_pmu__parse_cleanup(void)
1435{
1436 if (perf_pmu_events_list_num > 0) {
1437 struct perf_pmu_event_symbol *p;
1438 int i;
1439
1440 for (i = 0; i < perf_pmu_events_list_num; i++) {
1441 p = perf_pmu_events_list + i;
1442 free(p->symbol);
1443 }
1444 free(perf_pmu_events_list);
1445 perf_pmu_events_list = NULL;
1446 perf_pmu_events_list_num = 0;
1447 }
1448}
1449
1450#define SET_SYMBOL(str, stype) \
1451do { \
1452 p->symbol = str; \
1453 if (!p->symbol) \
1454 goto err; \
1455 p->type = stype; \
1456} while (0)
1457
1458/*
1459 * Read the pmu events list from sysfs
1460 * Save it into perf_pmu_events_list
1461 */
1462static void perf_pmu__parse_init(void)
1463{
1464
1465 struct perf_pmu *pmu = NULL;
1466 struct perf_pmu_alias *alias;
1467 int len = 0;
1468
1469 pmu = perf_pmu__find("cpu");
1470 if ((pmu == NULL) || list_empty(&pmu->aliases)) {
1471 perf_pmu_events_list_num = -1;
1472 return;
1473 }
1474 list_for_each_entry(alias, &pmu->aliases, list) {
1475 if (strchr(alias->name, '-'))
1476 len++;
1477 len++;
1478 }
1479 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1480 if (!perf_pmu_events_list)
1481 return;
1482 perf_pmu_events_list_num = len;
1483
1484 len = 0;
1485 list_for_each_entry(alias, &pmu->aliases, list) {
1486 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1487 char *tmp = strchr(alias->name, '-');
1488
1489 if (tmp != NULL) {
1490 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1491 PMU_EVENT_SYMBOL_PREFIX);
1492 p++;
1493 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1494 len += 2;
1495 } else {
1496 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1497 len++;
1498 }
1499 }
1500 qsort(perf_pmu_events_list, len,
1501 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1502
1503 return;
1504err:
1505 perf_pmu__parse_cleanup();
1506}
1507
1508enum perf_pmu_event_symbol_type
1509perf_pmu__parse_check(const char *name)
1510{
1511 struct perf_pmu_event_symbol p, *r;
1512
1513 /* scan kernel pmu events from sysfs if needed */
1514 if (perf_pmu_events_list_num == 0)
1515 perf_pmu__parse_init();
1516 /*
1517 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1518 * cpu-cycles has been handled by hardcode.
1519 * So it must be cpu// events, not kernel pmu event.
1520 */
1521 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1522 return PMU_EVENT_SYMBOL_ERR;
1523
1524 p.symbol = strdup(name);
1525 r = bsearch(&p, perf_pmu_events_list,
1526 (size_t) perf_pmu_events_list_num,
1527 sizeof(struct perf_pmu_event_symbol), comp_pmu);
1528 free(p.symbol);
1529 return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1530}
1531
1532static int parse_events__scanner(const char *str, void *data, int start_token)
1533{
1534 YY_BUFFER_STATE buffer;
1535 void *scanner;
1536 int ret;
1537
1538 ret = parse_events_lex_init_extra(start_token, &scanner);
1539 if (ret)
1540 return ret;
1541
1542 buffer = parse_events__scan_string(str, scanner);
1543
1544#ifdef PARSER_DEBUG
1545 parse_events_debug = 1;
1546#endif
1547 ret = parse_events_parse(data, scanner);
1548
1549 parse_events__flush_buffer(buffer, scanner);
1550 parse_events__delete_buffer(buffer, scanner);
1551 parse_events_lex_destroy(scanner);
1552 return ret;
1553}
1554
1555/*
1556 * parse event config string, return a list of event terms.
1557 */
1558int parse_events_terms(struct list_head *terms, const char *str)
1559{
1560 struct parse_events_terms data = {
1561 .terms = NULL,
1562 };
1563 int ret;
1564
1565 ret = parse_events__scanner(str, &data, PE_START_TERMS);
1566 if (!ret) {
1567 list_splice(data.terms, terms);
1568 zfree(&data.terms);
1569 return 0;
1570 }
1571
1572 parse_events_terms__delete(data.terms);
1573 return ret;
1574}
1575
1576int parse_events(struct perf_evlist *evlist, const char *str,
1577 struct parse_events_error *err)
1578{
1579 struct parse_events_evlist data = {
1580 .list = LIST_HEAD_INIT(data.list),
1581 .idx = evlist->nr_entries,
1582 .error = err,
1583 .evlist = evlist,
1584 };
1585 int ret;
1586
1587 ret = parse_events__scanner(str, &data, PE_START_EVENTS);
1588 perf_pmu__parse_cleanup();
1589 if (!ret) {
1590 struct perf_evsel *last;
1591
1592 if (list_empty(&data.list)) {
1593 WARN_ONCE(true, "WARNING: event parser found nothing");
1594 return -1;
1595 }
1596
1597 perf_evlist__splice_list_tail(evlist, &data.list);
1598 evlist->nr_groups += data.nr_groups;
1599 last = perf_evlist__last(evlist);
1600 last->cmdline_group_boundary = true;
1601
1602 return 0;
1603 }
1604
1605 /*
1606 * There are 2 users - builtin-record and builtin-test objects.
1607 * Both call perf_evlist__delete in case of error, so we dont
1608 * need to bother.
1609 */
1610 return ret;
1611}
1612
1613#define MAX_WIDTH 1000
1614static int get_term_width(void)
1615{
1616 struct winsize ws;
1617
1618 get_term_dimensions(&ws);
1619 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1620}
1621
1622static void parse_events_print_error(struct parse_events_error *err,
1623 const char *event)
1624{
1625 const char *str = "invalid or unsupported event: ";
1626 char _buf[MAX_WIDTH];
1627 char *buf = (char *) event;
1628 int idx = 0;
1629
1630 if (err->str) {
1631 /* -2 for extra '' in the final fprintf */
1632 int width = get_term_width() - 2;
1633 int len_event = strlen(event);
1634 int len_str, max_len, cut = 0;
1635
1636 /*
1637 * Maximum error index indent, we will cut
1638 * the event string if it's bigger.
1639 */
1640 int max_err_idx = 13;
1641
1642 /*
1643 * Let's be specific with the message when
1644 * we have the precise error.
1645 */
1646 str = "event syntax error: ";
1647 len_str = strlen(str);
1648 max_len = width - len_str;
1649
1650 buf = _buf;
1651
1652 /* We're cutting from the beggining. */
1653 if (err->idx > max_err_idx)
1654 cut = err->idx - max_err_idx;
1655
1656 strncpy(buf, event + cut, max_len);
1657
1658 /* Mark cut parts with '..' on both sides. */
1659 if (cut)
1660 buf[0] = buf[1] = '.';
1661
1662 if ((len_event - cut) > max_len) {
1663 buf[max_len - 1] = buf[max_len - 2] = '.';
1664 buf[max_len] = 0;
1665 }
1666
1667 idx = len_str + err->idx - cut;
1668 }
1669
1670 fprintf(stderr, "%s'%s'\n", str, buf);
1671 if (idx) {
1672 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1673 if (err->help)
1674 fprintf(stderr, "\n%s\n", err->help);
1675 free(err->str);
1676 free(err->help);
1677 }
1678
1679 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1680}
1681
1682#undef MAX_WIDTH
1683
1684int parse_events_option(const struct option *opt, const char *str,
1685 int unset __maybe_unused)
1686{
1687 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1688 struct parse_events_error err = { .idx = 0, };
1689 int ret = parse_events(evlist, str, &err);
1690
1691 if (ret)
1692 parse_events_print_error(&err, str);
1693
1694 return ret;
1695}
1696
1697static int
1698foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1699 int (*func)(struct perf_evsel *evsel,
1700 const void *arg),
1701 const void *arg)
1702{
1703 struct perf_evsel *last = NULL;
1704 int err;
1705
1706 /*
1707 * Don't return when list_empty, give func a chance to report
1708 * error when it found last == NULL.
1709 *
1710 * So no need to WARN here, let *func do this.
1711 */
1712 if (evlist->nr_entries > 0)
1713 last = perf_evlist__last(evlist);
1714
1715 do {
1716 err = (*func)(last, arg);
1717 if (err)
1718 return -1;
1719 if (!last)
1720 return 0;
1721
1722 if (last->node.prev == &evlist->entries)
1723 return 0;
1724 last = list_entry(last->node.prev, struct perf_evsel, node);
1725 } while (!last->cmdline_group_boundary);
1726
1727 return 0;
1728}
1729
1730static int set_filter(struct perf_evsel *evsel, const void *arg)
1731{
1732 const char *str = arg;
1733
1734 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1735 fprintf(stderr,
1736 "--filter option should follow a -e tracepoint option\n");
1737 return -1;
1738 }
1739
1740 if (perf_evsel__append_filter(evsel, "&&", str) < 0) {
1741 fprintf(stderr,
1742 "not enough memory to hold filter string\n");
1743 return -1;
1744 }
1745
1746 return 0;
1747}
1748
1749int parse_filter(const struct option *opt, const char *str,
1750 int unset __maybe_unused)
1751{
1752 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1753
1754 return foreach_evsel_in_last_glob(evlist, set_filter,
1755 (const void *)str);
1756}
1757
1758static int add_exclude_perf_filter(struct perf_evsel *evsel,
1759 const void *arg __maybe_unused)
1760{
1761 char new_filter[64];
1762
1763 if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
1764 fprintf(stderr,
1765 "--exclude-perf option should follow a -e tracepoint option\n");
1766 return -1;
1767 }
1768
1769 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
1770
1771 if (perf_evsel__append_filter(evsel, "&&", new_filter) < 0) {
1772 fprintf(stderr,
1773 "not enough memory to hold filter string\n");
1774 return -1;
1775 }
1776
1777 return 0;
1778}
1779
1780int exclude_perf(const struct option *opt,
1781 const char *arg __maybe_unused,
1782 int unset __maybe_unused)
1783{
1784 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1785
1786 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
1787 NULL);
1788}
1789
1790static const char * const event_type_descriptors[] = {
1791 "Hardware event",
1792 "Software event",
1793 "Tracepoint event",
1794 "Hardware cache event",
1795 "Raw hardware event descriptor",
1796 "Hardware breakpoint",
1797};
1798
1799static int cmp_string(const void *a, const void *b)
1800{
1801 const char * const *as = a;
1802 const char * const *bs = b;
1803
1804 return strcmp(*as, *bs);
1805}
1806
1807/*
1808 * Print the events from <debugfs_mount_point>/tracing/events
1809 */
1810
1811void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
1812 bool name_only)
1813{
1814 DIR *sys_dir, *evt_dir;
1815 struct dirent *sys_dirent, *evt_dirent;
1816 char evt_path[MAXPATHLEN];
1817 char dir_path[MAXPATHLEN];
1818 char **evt_list = NULL;
1819 unsigned int evt_i = 0, evt_num = 0;
1820 bool evt_num_known = false;
1821
1822restart:
1823 sys_dir = opendir(tracing_events_path);
1824 if (!sys_dir)
1825 return;
1826
1827 if (evt_num_known) {
1828 evt_list = zalloc(sizeof(char *) * evt_num);
1829 if (!evt_list)
1830 goto out_close_sys_dir;
1831 }
1832
1833 for_each_subsystem(sys_dir, sys_dirent) {
1834 if (subsys_glob != NULL &&
1835 !strglobmatch(sys_dirent->d_name, subsys_glob))
1836 continue;
1837
1838 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1839 sys_dirent->d_name);
1840 evt_dir = opendir(dir_path);
1841 if (!evt_dir)
1842 continue;
1843
1844 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1845 if (event_glob != NULL &&
1846 !strglobmatch(evt_dirent->d_name, event_glob))
1847 continue;
1848
1849 if (!evt_num_known) {
1850 evt_num++;
1851 continue;
1852 }
1853
1854 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1855 sys_dirent->d_name, evt_dirent->d_name);
1856
1857 evt_list[evt_i] = strdup(evt_path);
1858 if (evt_list[evt_i] == NULL)
1859 goto out_close_evt_dir;
1860 evt_i++;
1861 }
1862 closedir(evt_dir);
1863 }
1864 closedir(sys_dir);
1865
1866 if (!evt_num_known) {
1867 evt_num_known = true;
1868 goto restart;
1869 }
1870 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
1871 evt_i = 0;
1872 while (evt_i < evt_num) {
1873 if (name_only) {
1874 printf("%s ", evt_list[evt_i++]);
1875 continue;
1876 }
1877 printf(" %-50s [%s]\n", evt_list[evt_i++],
1878 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1879 }
1880 if (evt_num && pager_in_use())
1881 printf("\n");
1882
1883out_free:
1884 evt_num = evt_i;
1885 for (evt_i = 0; evt_i < evt_num; evt_i++)
1886 zfree(&evt_list[evt_i]);
1887 zfree(&evt_list);
1888 return;
1889
1890out_close_evt_dir:
1891 closedir(evt_dir);
1892out_close_sys_dir:
1893 closedir(sys_dir);
1894
1895 printf("FATAL: not enough memory to print %s\n",
1896 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
1897 if (evt_list)
1898 goto out_free;
1899}
1900
1901/*
1902 * Check whether event is in <debugfs_mount_point>/tracing/events
1903 */
1904
1905int is_valid_tracepoint(const char *event_string)
1906{
1907 DIR *sys_dir, *evt_dir;
1908 struct dirent *sys_dirent, *evt_dirent;
1909 char evt_path[MAXPATHLEN];
1910 char dir_path[MAXPATHLEN];
1911
1912 sys_dir = opendir(tracing_events_path);
1913 if (!sys_dir)
1914 return 0;
1915
1916 for_each_subsystem(sys_dir, sys_dirent) {
1917
1918 snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
1919 sys_dirent->d_name);
1920 evt_dir = opendir(dir_path);
1921 if (!evt_dir)
1922 continue;
1923
1924 for_each_event(sys_dirent, evt_dir, evt_dirent) {
1925 snprintf(evt_path, MAXPATHLEN, "%s:%s",
1926 sys_dirent->d_name, evt_dirent->d_name);
1927 if (!strcmp(evt_path, event_string)) {
1928 closedir(evt_dir);
1929 closedir(sys_dir);
1930 return 1;
1931 }
1932 }
1933 closedir(evt_dir);
1934 }
1935 closedir(sys_dir);
1936 return 0;
1937}
1938
1939static bool is_event_supported(u8 type, unsigned config)
1940{
1941 bool ret = true;
1942 int open_return;
1943 struct perf_evsel *evsel;
1944 struct perf_event_attr attr = {
1945 .type = type,
1946 .config = config,
1947 .disabled = 1,
1948 };
1949 struct {
1950 struct thread_map map;
1951 int threads[1];
1952 } tmap = {
1953 .map.nr = 1,
1954 .threads = { 0 },
1955 };
1956
1957 evsel = perf_evsel__new(&attr);
1958 if (evsel) {
1959 open_return = perf_evsel__open(evsel, NULL, &tmap.map);
1960 ret = open_return >= 0;
1961
1962 if (open_return == -EACCES) {
1963 /*
1964 * This happens if the paranoid value
1965 * /proc/sys/kernel/perf_event_paranoid is set to 2
1966 * Re-run with exclude_kernel set; we don't do that
1967 * by default as some ARM machines do not support it.
1968 *
1969 */
1970 evsel->attr.exclude_kernel = 1;
1971 ret = perf_evsel__open(evsel, NULL, &tmap.map) >= 0;
1972 }
1973 perf_evsel__delete(evsel);
1974 }
1975
1976 return ret;
1977}
1978
1979int print_hwcache_events(const char *event_glob, bool name_only)
1980{
1981 unsigned int type, op, i, evt_i = 0, evt_num = 0;
1982 char name[64];
1983 char **evt_list = NULL;
1984 bool evt_num_known = false;
1985
1986restart:
1987 if (evt_num_known) {
1988 evt_list = zalloc(sizeof(char *) * evt_num);
1989 if (!evt_list)
1990 goto out_enomem;
1991 }
1992
1993 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1994 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1995 /* skip invalid cache type */
1996 if (!perf_evsel__is_cache_op_valid(type, op))
1997 continue;
1998
1999 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2000 __perf_evsel__hw_cache_type_op_res_name(type, op, i,
2001 name, sizeof(name));
2002 if (event_glob != NULL && !strglobmatch(name, event_glob))
2003 continue;
2004
2005 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2006 type | (op << 8) | (i << 16)))
2007 continue;
2008
2009 if (!evt_num_known) {
2010 evt_num++;
2011 continue;
2012 }
2013
2014 evt_list[evt_i] = strdup(name);
2015 if (evt_list[evt_i] == NULL)
2016 goto out_enomem;
2017 evt_i++;
2018 }
2019 }
2020 }
2021
2022 if (!evt_num_known) {
2023 evt_num_known = true;
2024 goto restart;
2025 }
2026 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2027 evt_i = 0;
2028 while (evt_i < evt_num) {
2029 if (name_only) {
2030 printf("%s ", evt_list[evt_i++]);
2031 continue;
2032 }
2033 printf(" %-50s [%s]\n", evt_list[evt_i++],
2034 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2035 }
2036 if (evt_num && pager_in_use())
2037 printf("\n");
2038
2039out_free:
2040 evt_num = evt_i;
2041 for (evt_i = 0; evt_i < evt_num; evt_i++)
2042 zfree(&evt_list[evt_i]);
2043 zfree(&evt_list);
2044 return evt_num;
2045
2046out_enomem:
2047 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2048 if (evt_list)
2049 goto out_free;
2050 return evt_num;
2051}
2052
2053void print_symbol_events(const char *event_glob, unsigned type,
2054 struct event_symbol *syms, unsigned max,
2055 bool name_only)
2056{
2057 unsigned int i, evt_i = 0, evt_num = 0;
2058 char name[MAX_NAME_LEN];
2059 char **evt_list = NULL;
2060 bool evt_num_known = false;
2061
2062restart:
2063 if (evt_num_known) {
2064 evt_list = zalloc(sizeof(char *) * evt_num);
2065 if (!evt_list)
2066 goto out_enomem;
2067 syms -= max;
2068 }
2069
2070 for (i = 0; i < max; i++, syms++) {
2071
2072 if (event_glob != NULL && syms->symbol != NULL &&
2073 !(strglobmatch(syms->symbol, event_glob) ||
2074 (syms->alias && strglobmatch(syms->alias, event_glob))))
2075 continue;
2076
2077 if (!is_event_supported(type, i))
2078 continue;
2079
2080 if (!evt_num_known) {
2081 evt_num++;
2082 continue;
2083 }
2084
2085 if (!name_only && strlen(syms->alias))
2086 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2087 else
2088 strncpy(name, syms->symbol, MAX_NAME_LEN);
2089
2090 evt_list[evt_i] = strdup(name);
2091 if (evt_list[evt_i] == NULL)
2092 goto out_enomem;
2093 evt_i++;
2094 }
2095
2096 if (!evt_num_known) {
2097 evt_num_known = true;
2098 goto restart;
2099 }
2100 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2101 evt_i = 0;
2102 while (evt_i < evt_num) {
2103 if (name_only) {
2104 printf("%s ", evt_list[evt_i++]);
2105 continue;
2106 }
2107 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2108 }
2109 if (evt_num && pager_in_use())
2110 printf("\n");
2111
2112out_free:
2113 evt_num = evt_i;
2114 for (evt_i = 0; evt_i < evt_num; evt_i++)
2115 zfree(&evt_list[evt_i]);
2116 zfree(&evt_list);
2117 return;
2118
2119out_enomem:
2120 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2121 if (evt_list)
2122 goto out_free;
2123}
2124
2125/*
2126 * Print the help text for the event symbols:
2127 */
2128void print_events(const char *event_glob, bool name_only)
2129{
2130 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2131 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2132
2133 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2134 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2135
2136 print_hwcache_events(event_glob, name_only);
2137
2138 print_pmu_events(event_glob, name_only);
2139
2140 if (event_glob != NULL)
2141 return;
2142
2143 if (!name_only) {
2144 printf(" %-50s [%s]\n",
2145 "rNNN",
2146 event_type_descriptors[PERF_TYPE_RAW]);
2147 printf(" %-50s [%s]\n",
2148 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2149 event_type_descriptors[PERF_TYPE_RAW]);
2150 if (pager_in_use())
2151 printf(" (see 'man perf-list' on how to encode it)\n\n");
2152
2153 printf(" %-50s [%s]\n",
2154 "mem:<addr>[/len][:access]",
2155 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2156 if (pager_in_use())
2157 printf("\n");
2158 }
2159
2160 print_tracepoint_events(NULL, NULL, name_only);
2161}
2162
2163int parse_events__is_hardcoded_term(struct parse_events_term *term)
2164{
2165 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2166}
2167
2168static int new_term(struct parse_events_term **_term, int type_val,
2169 int type_term, char *config,
2170 char *str, u64 num, int err_term, int err_val)
2171{
2172 struct parse_events_term *term;
2173
2174 term = zalloc(sizeof(*term));
2175 if (!term)
2176 return -ENOMEM;
2177
2178 INIT_LIST_HEAD(&term->list);
2179 term->type_val = type_val;
2180 term->type_term = type_term;
2181 term->config = config;
2182 term->err_term = err_term;
2183 term->err_val = err_val;
2184
2185 switch (type_val) {
2186 case PARSE_EVENTS__TERM_TYPE_NUM:
2187 term->val.num = num;
2188 break;
2189 case PARSE_EVENTS__TERM_TYPE_STR:
2190 term->val.str = str;
2191 break;
2192 default:
2193 free(term);
2194 return -EINVAL;
2195 }
2196
2197 *_term = term;
2198 return 0;
2199}
2200
2201int parse_events_term__num(struct parse_events_term **term,
2202 int type_term, char *config, u64 num,
2203 void *loc_term_, void *loc_val_)
2204{
2205 YYLTYPE *loc_term = loc_term_;
2206 YYLTYPE *loc_val = loc_val_;
2207
2208 return new_term(term, PARSE_EVENTS__TERM_TYPE_NUM, type_term,
2209 config, NULL, num,
2210 loc_term ? loc_term->first_column : 0,
2211 loc_val ? loc_val->first_column : 0);
2212}
2213
2214int parse_events_term__str(struct parse_events_term **term,
2215 int type_term, char *config, char *str,
2216 void *loc_term_, void *loc_val_)
2217{
2218 YYLTYPE *loc_term = loc_term_;
2219 YYLTYPE *loc_val = loc_val_;
2220
2221 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR, type_term,
2222 config, str, 0,
2223 loc_term ? loc_term->first_column : 0,
2224 loc_val ? loc_val->first_column : 0);
2225}
2226
2227int parse_events_term__sym_hw(struct parse_events_term **term,
2228 char *config, unsigned idx)
2229{
2230 struct event_symbol *sym;
2231
2232 BUG_ON(idx >= PERF_COUNT_HW_MAX);
2233 sym = &event_symbols_hw[idx];
2234
2235 if (config)
2236 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2237 PARSE_EVENTS__TERM_TYPE_USER, config,
2238 (char *) sym->symbol, 0, 0, 0);
2239 else
2240 return new_term(term, PARSE_EVENTS__TERM_TYPE_STR,
2241 PARSE_EVENTS__TERM_TYPE_USER,
2242 (char *) "event", (char *) sym->symbol,
2243 0, 0, 0);
2244}
2245
2246int parse_events_term__clone(struct parse_events_term **new,
2247 struct parse_events_term *term)
2248{
2249 return new_term(new, term->type_val, term->type_term, term->config,
2250 term->val.str, term->val.num,
2251 term->err_term, term->err_val);
2252}
2253
2254void parse_events_terms__purge(struct list_head *terms)
2255{
2256 struct parse_events_term *term, *h;
2257
2258 list_for_each_entry_safe(term, h, terms, list) {
2259 if (term->array.nr_ranges)
2260 free(term->array.ranges);
2261 list_del_init(&term->list);
2262 free(term);
2263 }
2264}
2265
2266void parse_events_terms__delete(struct list_head *terms)
2267{
2268 if (!terms)
2269 return;
2270 parse_events_terms__purge(terms);
2271 free(terms);
2272}
2273
2274void parse_events__clear_array(struct parse_events_array *a)
2275{
2276 free(a->ranges);
2277}
2278
2279void parse_events_evlist_error(struct parse_events_evlist *data,
2280 int idx, const char *str)
2281{
2282 struct parse_events_error *err = data->error;
2283
2284 if (!err)
2285 return;
2286 err->idx = idx;
2287 err->str = strdup(str);
2288 WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2289}
2290
2291static void config_terms_list(char *buf, size_t buf_sz)
2292{
2293 int i;
2294 bool first = true;
2295
2296 buf[0] = '\0';
2297 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2298 const char *name = config_term_names[i];
2299
2300 if (!config_term_avail(i, NULL))
2301 continue;
2302 if (!name)
2303 continue;
2304 if (name[0] == '<')
2305 continue;
2306
2307 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2308 return;
2309
2310 if (!first)
2311 strcat(buf, ",");
2312 else
2313 first = false;
2314 strcat(buf, name);
2315 }
2316}
2317
2318/*
2319 * Return string contains valid config terms of an event.
2320 * @additional_terms: For terms such as PMU sysfs terms.
2321 */
2322char *parse_events_formats_error_string(char *additional_terms)
2323{
2324 char *str;
2325 /* "branch_type" is the longest name */
2326 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2327 (sizeof("branch_type") - 1)];
2328
2329 config_terms_list(static_terms, sizeof(static_terms));
2330 /* valid terms */
2331 if (additional_terms) {
2332 if (asprintf(&str, "valid terms: %s,%s",
2333 additional_terms, static_terms) < 0)
2334 goto fail;
2335 } else {
2336 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2337 goto fail;
2338 }
2339 return str;
2340
2341fail:
2342 return NULL;
2343}