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 void*
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 #include "util/pfm.h"
40 #include "util/parse-events-hybrid.h"
41 #include "util/pmu-hybrid.h"
42 #include "perf.h"
43
44 #define MAX_NAME_LEN 100
45
46 #ifdef PARSER_DEBUG
47 extern int parse_events_debug;
48 #endif
49 int parse_events_parse(void *parse_state, void *scanner);
50 static int get_config_terms(struct list_head *head_config,
51 struct list_head *head_terms __maybe_unused);
52 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state,
53 const char *str, char *pmu_name,
54 struct list_head *list);
55
56 static struct perf_pmu_event_symbol *perf_pmu_events_list;
57 /*
58 * The variable indicates the number of supported pmu event symbols.
59 * 0 means not initialized and ready to init
60 * -1 means failed to init, don't try anymore
61 * >0 is the number of supported pmu event symbols
62 */
63 static int perf_pmu_events_list_num;
64
65 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
66 [PERF_COUNT_HW_CPU_CYCLES] = {
67 .symbol = "cpu-cycles",
68 .alias = "cycles",
69 },
70 [PERF_COUNT_HW_INSTRUCTIONS] = {
71 .symbol = "instructions",
72 .alias = "",
73 },
74 [PERF_COUNT_HW_CACHE_REFERENCES] = {
75 .symbol = "cache-references",
76 .alias = "",
77 },
78 [PERF_COUNT_HW_CACHE_MISSES] = {
79 .symbol = "cache-misses",
80 .alias = "",
81 },
82 [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
83 .symbol = "branch-instructions",
84 .alias = "branches",
85 },
86 [PERF_COUNT_HW_BRANCH_MISSES] = {
87 .symbol = "branch-misses",
88 .alias = "",
89 },
90 [PERF_COUNT_HW_BUS_CYCLES] = {
91 .symbol = "bus-cycles",
92 .alias = "",
93 },
94 [PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
95 .symbol = "stalled-cycles-frontend",
96 .alias = "idle-cycles-frontend",
97 },
98 [PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
99 .symbol = "stalled-cycles-backend",
100 .alias = "idle-cycles-backend",
101 },
102 [PERF_COUNT_HW_REF_CPU_CYCLES] = {
103 .symbol = "ref-cycles",
104 .alias = "",
105 },
106 };
107
108 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
109 [PERF_COUNT_SW_CPU_CLOCK] = {
110 .symbol = "cpu-clock",
111 .alias = "",
112 },
113 [PERF_COUNT_SW_TASK_CLOCK] = {
114 .symbol = "task-clock",
115 .alias = "",
116 },
117 [PERF_COUNT_SW_PAGE_FAULTS] = {
118 .symbol = "page-faults",
119 .alias = "faults",
120 },
121 [PERF_COUNT_SW_CONTEXT_SWITCHES] = {
122 .symbol = "context-switches",
123 .alias = "cs",
124 },
125 [PERF_COUNT_SW_CPU_MIGRATIONS] = {
126 .symbol = "cpu-migrations",
127 .alias = "migrations",
128 },
129 [PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
130 .symbol = "minor-faults",
131 .alias = "",
132 },
133 [PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
134 .symbol = "major-faults",
135 .alias = "",
136 },
137 [PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
138 .symbol = "alignment-faults",
139 .alias = "",
140 },
141 [PERF_COUNT_SW_EMULATION_FAULTS] = {
142 .symbol = "emulation-faults",
143 .alias = "",
144 },
145 [PERF_COUNT_SW_DUMMY] = {
146 .symbol = "dummy",
147 .alias = "",
148 },
149 [PERF_COUNT_SW_BPF_OUTPUT] = {
150 .symbol = "bpf-output",
151 .alias = "",
152 },
153 [PERF_COUNT_SW_CGROUP_SWITCHES] = {
154 .symbol = "cgroup-switches",
155 .alias = "",
156 },
157 };
158
159 #define __PERF_EVENT_FIELD(config, name) \
160 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
161
162 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
163 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
164 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
165 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
166
167 #define for_each_subsystem(sys_dir, sys_dirent) \
168 while ((sys_dirent = readdir(sys_dir)) != NULL) \
169 if (sys_dirent->d_type == DT_DIR && \
170 (strcmp(sys_dirent->d_name, ".")) && \
171 (strcmp(sys_dirent->d_name, "..")))
172
tp_event_has_id(const char * dir_path,struct dirent * evt_dir)173 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
174 {
175 char evt_path[MAXPATHLEN];
176 int fd;
177
178 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
179 fd = open(evt_path, O_RDONLY);
180 if (fd < 0)
181 return -EINVAL;
182 close(fd);
183
184 return 0;
185 }
186
187 #define for_each_event(dir_path, evt_dir, evt_dirent) \
188 while ((evt_dirent = readdir(evt_dir)) != NULL) \
189 if (evt_dirent->d_type == DT_DIR && \
190 (strcmp(evt_dirent->d_name, ".")) && \
191 (strcmp(evt_dirent->d_name, "..")) && \
192 (!tp_event_has_id(dir_path, evt_dirent)))
193
194 #define MAX_EVENT_LENGTH 512
195
parse_events__handle_error(struct parse_events_error * err,int idx,char * str,char * help)196 void parse_events__handle_error(struct parse_events_error *err, int idx,
197 char *str, char *help)
198 {
199 if (WARN(!str, "WARNING: failed to provide error string\n")) {
200 free(help);
201 return;
202 }
203 switch (err->num_errors) {
204 case 0:
205 err->idx = idx;
206 err->str = str;
207 err->help = help;
208 break;
209 case 1:
210 err->first_idx = err->idx;
211 err->idx = idx;
212 err->first_str = err->str;
213 err->str = str;
214 err->first_help = err->help;
215 err->help = help;
216 break;
217 default:
218 pr_debug("Multiple errors dropping message: %s (%s)\n",
219 err->str, err->help);
220 free(err->str);
221 err->str = str;
222 free(err->help);
223 err->help = help;
224 break;
225 }
226 err->num_errors++;
227 }
228
tracepoint_id_to_path(u64 config)229 struct tracepoint_path *tracepoint_id_to_path(u64 config)
230 {
231 struct tracepoint_path *path = NULL;
232 DIR *sys_dir, *evt_dir;
233 struct dirent *sys_dirent, *evt_dirent;
234 char id_buf[24];
235 int fd;
236 u64 id;
237 char evt_path[MAXPATHLEN];
238 char *dir_path;
239
240 sys_dir = tracing_events__opendir();
241 if (!sys_dir)
242 return NULL;
243
244 for_each_subsystem(sys_dir, sys_dirent) {
245 dir_path = get_events_file(sys_dirent->d_name);
246 if (!dir_path)
247 continue;
248 evt_dir = opendir(dir_path);
249 if (!evt_dir)
250 goto next;
251
252 for_each_event(dir_path, evt_dir, evt_dirent) {
253
254 scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
255 evt_dirent->d_name);
256 fd = open(evt_path, O_RDONLY);
257 if (fd < 0)
258 continue;
259 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
260 close(fd);
261 continue;
262 }
263 close(fd);
264 id = atoll(id_buf);
265 if (id == config) {
266 put_events_file(dir_path);
267 closedir(evt_dir);
268 closedir(sys_dir);
269 path = zalloc(sizeof(*path));
270 if (!path)
271 return NULL;
272 if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
273 free(path);
274 return NULL;
275 }
276 if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
277 zfree(&path->system);
278 free(path);
279 return NULL;
280 }
281 return path;
282 }
283 }
284 closedir(evt_dir);
285 next:
286 put_events_file(dir_path);
287 }
288
289 closedir(sys_dir);
290 return NULL;
291 }
292
tracepoint_name_to_path(const char * name)293 struct tracepoint_path *tracepoint_name_to_path(const char *name)
294 {
295 struct tracepoint_path *path = zalloc(sizeof(*path));
296 char *str = strchr(name, ':');
297
298 if (path == NULL || str == NULL) {
299 free(path);
300 return NULL;
301 }
302
303 path->system = strndup(name, str - name);
304 path->name = strdup(str+1);
305
306 if (path->system == NULL || path->name == NULL) {
307 zfree(&path->system);
308 zfree(&path->name);
309 zfree(&path);
310 }
311
312 return path;
313 }
314
event_type(int type)315 const char *event_type(int type)
316 {
317 switch (type) {
318 case PERF_TYPE_HARDWARE:
319 return "hardware";
320
321 case PERF_TYPE_SOFTWARE:
322 return "software";
323
324 case PERF_TYPE_TRACEPOINT:
325 return "tracepoint";
326
327 case PERF_TYPE_HW_CACHE:
328 return "hardware-cache";
329
330 default:
331 break;
332 }
333
334 return "unknown";
335 }
336
parse_events__is_name_term(struct parse_events_term * term)337 static int parse_events__is_name_term(struct parse_events_term *term)
338 {
339 return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
340 }
341
get_config_name(struct list_head * head_terms)342 static char *get_config_name(struct list_head *head_terms)
343 {
344 struct parse_events_term *term;
345
346 if (!head_terms)
347 return NULL;
348
349 list_for_each_entry(term, head_terms, list)
350 if (parse_events__is_name_term(term))
351 return term->val.str;
352
353 return NULL;
354 }
355
356 static struct evsel *
__add_event(struct list_head * list,int * idx,struct perf_event_attr * attr,bool init_attr,char * name,struct perf_pmu * pmu,struct list_head * config_terms,bool auto_merge_stats,const char * cpu_list)357 __add_event(struct list_head *list, int *idx,
358 struct perf_event_attr *attr,
359 bool init_attr,
360 char *name, struct perf_pmu *pmu,
361 struct list_head *config_terms, bool auto_merge_stats,
362 const char *cpu_list)
363 {
364 struct evsel *evsel;
365 struct perf_cpu_map *cpus = pmu ? perf_cpu_map__get(pmu->cpus) :
366 cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
367
368 if (pmu && attr->type == PERF_TYPE_RAW)
369 perf_pmu__warn_invalid_config(pmu, attr->config, name);
370
371 if (init_attr)
372 event_attr_init(attr);
373
374 evsel = evsel__new_idx(attr, *idx);
375 if (!evsel) {
376 perf_cpu_map__put(cpus);
377 return NULL;
378 }
379
380 (*idx)++;
381 evsel->core.cpus = cpus;
382 evsel->core.own_cpus = perf_cpu_map__get(cpus);
383 evsel->core.system_wide = pmu ? pmu->is_uncore : false;
384 evsel->auto_merge_stats = auto_merge_stats;
385
386 if (name)
387 evsel->name = strdup(name);
388
389 if (config_terms)
390 list_splice_init(config_terms, &evsel->config_terms);
391
392 if (list)
393 list_add_tail(&evsel->core.node, list);
394
395 return evsel;
396 }
397
parse_events__add_event(int idx,struct perf_event_attr * attr,char * name,struct perf_pmu * pmu)398 struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr,
399 char *name, struct perf_pmu *pmu)
400 {
401 return __add_event(NULL, &idx, attr, false, name, pmu, NULL, false,
402 NULL);
403 }
404
add_event(struct list_head * list,int * idx,struct perf_event_attr * attr,char * name,struct list_head * config_terms)405 static int add_event(struct list_head *list, int *idx,
406 struct perf_event_attr *attr, char *name,
407 struct list_head *config_terms)
408 {
409 return __add_event(list, idx, attr, true, name, NULL, config_terms,
410 false, NULL) ? 0 : -ENOMEM;
411 }
412
add_event_tool(struct list_head * list,int * idx,enum perf_tool_event tool_event)413 static int add_event_tool(struct list_head *list, int *idx,
414 enum perf_tool_event tool_event)
415 {
416 struct evsel *evsel;
417 struct perf_event_attr attr = {
418 .type = PERF_TYPE_SOFTWARE,
419 .config = PERF_COUNT_SW_DUMMY,
420 };
421
422 evsel = __add_event(list, idx, &attr, true, NULL, NULL, NULL, false,
423 "0");
424 if (!evsel)
425 return -ENOMEM;
426 evsel->tool_event = tool_event;
427 if (tool_event == PERF_TOOL_DURATION_TIME)
428 evsel->unit = "ns";
429 return 0;
430 }
431
parse_aliases(char * str,const char * names[][EVSEL__MAX_ALIASES],int size)432 static int parse_aliases(char *str, const char *names[][EVSEL__MAX_ALIASES], int size)
433 {
434 int i, j;
435 int n, longest = -1;
436
437 for (i = 0; i < size; i++) {
438 for (j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) {
439 n = strlen(names[i][j]);
440 if (n > longest && !strncasecmp(str, names[i][j], n))
441 longest = n;
442 }
443 if (longest > 0)
444 return i;
445 }
446
447 return -1;
448 }
449
450 typedef int config_term_func_t(struct perf_event_attr *attr,
451 struct parse_events_term *term,
452 struct parse_events_error *err);
453 static int config_term_common(struct perf_event_attr *attr,
454 struct parse_events_term *term,
455 struct parse_events_error *err);
456 static int config_attr(struct perf_event_attr *attr,
457 struct list_head *head,
458 struct parse_events_error *err,
459 config_term_func_t config_term);
460
parse_events_add_cache(struct list_head * list,int * idx,char * type,char * op_result1,char * op_result2,struct parse_events_error * err,struct list_head * head_config,struct parse_events_state * parse_state)461 int parse_events_add_cache(struct list_head *list, int *idx,
462 char *type, char *op_result1, char *op_result2,
463 struct parse_events_error *err,
464 struct list_head *head_config,
465 struct parse_events_state *parse_state)
466 {
467 struct perf_event_attr attr;
468 LIST_HEAD(config_terms);
469 char name[MAX_NAME_LEN], *config_name;
470 int cache_type = -1, cache_op = -1, cache_result = -1;
471 char *op_result[2] = { op_result1, op_result2 };
472 int i, n, ret;
473 bool hybrid;
474
475 /*
476 * No fallback - if we cannot get a clear cache type
477 * then bail out:
478 */
479 cache_type = parse_aliases(type, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX);
480 if (cache_type == -1)
481 return -EINVAL;
482
483 config_name = get_config_name(head_config);
484 n = snprintf(name, MAX_NAME_LEN, "%s", type);
485
486 for (i = 0; (i < 2) && (op_result[i]); i++) {
487 char *str = op_result[i];
488
489 n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
490
491 if (cache_op == -1) {
492 cache_op = parse_aliases(str, evsel__hw_cache_op,
493 PERF_COUNT_HW_CACHE_OP_MAX);
494 if (cache_op >= 0) {
495 if (!evsel__is_cache_op_valid(cache_type, cache_op))
496 return -EINVAL;
497 continue;
498 }
499 }
500
501 if (cache_result == -1) {
502 cache_result = parse_aliases(str, evsel__hw_cache_result,
503 PERF_COUNT_HW_CACHE_RESULT_MAX);
504 if (cache_result >= 0)
505 continue;
506 }
507 }
508
509 /*
510 * Fall back to reads:
511 */
512 if (cache_op == -1)
513 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
514
515 /*
516 * Fall back to accesses:
517 */
518 if (cache_result == -1)
519 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
520
521 memset(&attr, 0, sizeof(attr));
522 attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
523 attr.type = PERF_TYPE_HW_CACHE;
524
525 if (head_config) {
526 if (config_attr(&attr, head_config, err,
527 config_term_common))
528 return -EINVAL;
529
530 if (get_config_terms(head_config, &config_terms))
531 return -ENOMEM;
532 }
533
534 ret = parse_events__add_cache_hybrid(list, idx, &attr,
535 config_name ? : name, &config_terms,
536 &hybrid, parse_state);
537 if (hybrid)
538 goto out_free_terms;
539
540 ret = add_event(list, idx, &attr, config_name ? : name, &config_terms);
541 out_free_terms:
542 free_config_terms(&config_terms);
543 return ret;
544 }
545
tracepoint_error(struct parse_events_error * e,int err,const char * sys,const char * name)546 static void tracepoint_error(struct parse_events_error *e, int err,
547 const char *sys, const char *name)
548 {
549 const char *str;
550 char help[BUFSIZ];
551
552 if (!e)
553 return;
554
555 /*
556 * We get error directly from syscall errno ( > 0),
557 * or from encoded pointer's error ( < 0).
558 */
559 err = abs(err);
560
561 switch (err) {
562 case EACCES:
563 str = "can't access trace events";
564 break;
565 case ENOENT:
566 str = "unknown tracepoint";
567 break;
568 default:
569 str = "failed to add tracepoint";
570 break;
571 }
572
573 tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
574 parse_events__handle_error(e, 0, strdup(str), strdup(help));
575 }
576
add_tracepoint(struct list_head * list,int * idx,const char * sys_name,const char * evt_name,struct parse_events_error * err,struct list_head * head_config)577 static int add_tracepoint(struct list_head *list, int *idx,
578 const char *sys_name, const char *evt_name,
579 struct parse_events_error *err,
580 struct list_head *head_config)
581 {
582 struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++);
583
584 if (IS_ERR(evsel)) {
585 tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
586 return PTR_ERR(evsel);
587 }
588
589 if (head_config) {
590 LIST_HEAD(config_terms);
591
592 if (get_config_terms(head_config, &config_terms))
593 return -ENOMEM;
594 list_splice(&config_terms, &evsel->config_terms);
595 }
596
597 list_add_tail(&evsel->core.node, list);
598 return 0;
599 }
600
add_tracepoint_multi_event(struct list_head * list,int * idx,const char * sys_name,const char * evt_name,struct parse_events_error * err,struct list_head * head_config)601 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
602 const char *sys_name, const char *evt_name,
603 struct parse_events_error *err,
604 struct list_head *head_config)
605 {
606 char *evt_path;
607 struct dirent *evt_ent;
608 DIR *evt_dir;
609 int ret = 0, found = 0;
610
611 evt_path = get_events_file(sys_name);
612 if (!evt_path) {
613 tracepoint_error(err, errno, sys_name, evt_name);
614 return -1;
615 }
616 evt_dir = opendir(evt_path);
617 if (!evt_dir) {
618 put_events_file(evt_path);
619 tracepoint_error(err, errno, sys_name, evt_name);
620 return -1;
621 }
622
623 while (!ret && (evt_ent = readdir(evt_dir))) {
624 if (!strcmp(evt_ent->d_name, ".")
625 || !strcmp(evt_ent->d_name, "..")
626 || !strcmp(evt_ent->d_name, "enable")
627 || !strcmp(evt_ent->d_name, "filter"))
628 continue;
629
630 if (!strglobmatch(evt_ent->d_name, evt_name))
631 continue;
632
633 found++;
634
635 ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
636 err, head_config);
637 }
638
639 if (!found) {
640 tracepoint_error(err, ENOENT, sys_name, evt_name);
641 ret = -1;
642 }
643
644 put_events_file(evt_path);
645 closedir(evt_dir);
646 return ret;
647 }
648
add_tracepoint_event(struct list_head * list,int * idx,const char * sys_name,const char * evt_name,struct parse_events_error * err,struct list_head * head_config)649 static int add_tracepoint_event(struct list_head *list, int *idx,
650 const char *sys_name, const char *evt_name,
651 struct parse_events_error *err,
652 struct list_head *head_config)
653 {
654 return strpbrk(evt_name, "*?") ?
655 add_tracepoint_multi_event(list, idx, sys_name, evt_name,
656 err, head_config) :
657 add_tracepoint(list, idx, sys_name, evt_name,
658 err, head_config);
659 }
660
add_tracepoint_multi_sys(struct list_head * list,int * idx,const char * sys_name,const char * evt_name,struct parse_events_error * err,struct list_head * head_config)661 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
662 const char *sys_name, const char *evt_name,
663 struct parse_events_error *err,
664 struct list_head *head_config)
665 {
666 struct dirent *events_ent;
667 DIR *events_dir;
668 int ret = 0;
669
670 events_dir = tracing_events__opendir();
671 if (!events_dir) {
672 tracepoint_error(err, errno, sys_name, evt_name);
673 return -1;
674 }
675
676 while (!ret && (events_ent = readdir(events_dir))) {
677 if (!strcmp(events_ent->d_name, ".")
678 || !strcmp(events_ent->d_name, "..")
679 || !strcmp(events_ent->d_name, "enable")
680 || !strcmp(events_ent->d_name, "header_event")
681 || !strcmp(events_ent->d_name, "header_page"))
682 continue;
683
684 if (!strglobmatch(events_ent->d_name, sys_name))
685 continue;
686
687 ret = add_tracepoint_event(list, idx, events_ent->d_name,
688 evt_name, err, head_config);
689 }
690
691 closedir(events_dir);
692 return ret;
693 }
694
695 #ifdef HAVE_LIBBPF_SUPPORT
696 struct __add_bpf_event_param {
697 struct parse_events_state *parse_state;
698 struct list_head *list;
699 struct list_head *head_config;
700 };
701
add_bpf_event(const char * group,const char * event,int fd,struct bpf_object * obj,void * _param)702 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
703 void *_param)
704 {
705 LIST_HEAD(new_evsels);
706 struct __add_bpf_event_param *param = _param;
707 struct parse_events_state *parse_state = param->parse_state;
708 struct list_head *list = param->list;
709 struct evsel *pos;
710 int err;
711 /*
712 * Check if we should add the event, i.e. if it is a TP but starts with a '!',
713 * then don't add the tracepoint, this will be used for something else, like
714 * adding to a BPF_MAP_TYPE_PROG_ARRAY.
715 *
716 * See tools/perf/examples/bpf/augmented_raw_syscalls.c
717 */
718 if (group[0] == '!')
719 return 0;
720
721 pr_debug("add bpf event %s:%s and attach bpf program %d\n",
722 group, event, fd);
723
724 err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
725 event, parse_state->error,
726 param->head_config);
727 if (err) {
728 struct evsel *evsel, *tmp;
729
730 pr_debug("Failed to add BPF event %s:%s\n",
731 group, event);
732 list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
733 list_del_init(&evsel->core.node);
734 evsel__delete(evsel);
735 }
736 return err;
737 }
738 pr_debug("adding %s:%s\n", group, event);
739
740 list_for_each_entry(pos, &new_evsels, core.node) {
741 pr_debug("adding %s:%s to %p\n",
742 group, event, pos);
743 pos->bpf_fd = fd;
744 pos->bpf_obj = obj;
745 }
746 list_splice(&new_evsels, list);
747 return 0;
748 }
749
parse_events_load_bpf_obj(struct parse_events_state * parse_state,struct list_head * list,struct bpf_object * obj,struct list_head * head_config)750 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
751 struct list_head *list,
752 struct bpf_object *obj,
753 struct list_head *head_config)
754 {
755 int err;
756 char errbuf[BUFSIZ];
757 struct __add_bpf_event_param param = {parse_state, list, head_config};
758 static bool registered_unprobe_atexit = false;
759
760 if (IS_ERR(obj) || !obj) {
761 snprintf(errbuf, sizeof(errbuf),
762 "Internal error: load bpf obj with NULL");
763 err = -EINVAL;
764 goto errout;
765 }
766
767 /*
768 * Register atexit handler before calling bpf__probe() so
769 * bpf__probe() don't need to unprobe probe points its already
770 * created when failure.
771 */
772 if (!registered_unprobe_atexit) {
773 atexit(bpf__clear);
774 registered_unprobe_atexit = true;
775 }
776
777 err = bpf__probe(obj);
778 if (err) {
779 bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
780 goto errout;
781 }
782
783 err = bpf__load(obj);
784 if (err) {
785 bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
786 goto errout;
787 }
788
789 err = bpf__foreach_event(obj, add_bpf_event, ¶m);
790 if (err) {
791 snprintf(errbuf, sizeof(errbuf),
792 "Attach events in BPF object failed");
793 goto errout;
794 }
795
796 return 0;
797 errout:
798 parse_events__handle_error(parse_state->error, 0,
799 strdup(errbuf), strdup("(add -v to see detail)"));
800 return err;
801 }
802
803 static int
parse_events_config_bpf(struct parse_events_state * parse_state,struct bpf_object * obj,struct list_head * head_config)804 parse_events_config_bpf(struct parse_events_state *parse_state,
805 struct bpf_object *obj,
806 struct list_head *head_config)
807 {
808 struct parse_events_term *term;
809 int error_pos;
810
811 if (!head_config || list_empty(head_config))
812 return 0;
813
814 list_for_each_entry(term, head_config, list) {
815 int err;
816
817 if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
818 parse_events__handle_error(parse_state->error, term->err_term,
819 strdup("Invalid config term for BPF object"),
820 NULL);
821 return -EINVAL;
822 }
823
824 err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
825 if (err) {
826 char errbuf[BUFSIZ];
827 int idx;
828
829 bpf__strerror_config_obj(obj, term, parse_state->evlist,
830 &error_pos, err, errbuf,
831 sizeof(errbuf));
832
833 if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
834 idx = term->err_val;
835 else
836 idx = term->err_term + error_pos;
837
838 parse_events__handle_error(parse_state->error, idx,
839 strdup(errbuf),
840 strdup(
841 "Hint:\tValid config terms:\n"
842 " \tmap:[<arraymap>].value<indices>=[value]\n"
843 " \tmap:[<eventmap>].event<indices>=[event]\n"
844 "\n"
845 " \twhere <indices> is something like [0,3...5] or [all]\n"
846 " \t(add -v to see detail)"));
847 return err;
848 }
849 }
850 return 0;
851 }
852
853 /*
854 * Split config terms:
855 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
856 * 'call-graph=fp' is 'evt config', should be applied to each
857 * events in bpf.c.
858 * 'map:array.value[0]=1' is 'obj config', should be processed
859 * with parse_events_config_bpf.
860 *
861 * Move object config terms from the first list to obj_head_config.
862 */
863 static void
split_bpf_config_terms(struct list_head * evt_head_config,struct list_head * obj_head_config)864 split_bpf_config_terms(struct list_head *evt_head_config,
865 struct list_head *obj_head_config)
866 {
867 struct parse_events_term *term, *temp;
868
869 /*
870 * Currently, all possible user config term
871 * belong to bpf object. parse_events__is_hardcoded_term()
872 * happens to be a good flag.
873 *
874 * See parse_events_config_bpf() and
875 * config_term_tracepoint().
876 */
877 list_for_each_entry_safe(term, temp, evt_head_config, list)
878 if (!parse_events__is_hardcoded_term(term))
879 list_move_tail(&term->list, obj_head_config);
880 }
881
parse_events_load_bpf(struct parse_events_state * parse_state,struct list_head * list,char * bpf_file_name,bool source,struct list_head * head_config)882 int parse_events_load_bpf(struct parse_events_state *parse_state,
883 struct list_head *list,
884 char *bpf_file_name,
885 bool source,
886 struct list_head *head_config)
887 {
888 int err;
889 struct bpf_object *obj;
890 LIST_HEAD(obj_head_config);
891
892 if (head_config)
893 split_bpf_config_terms(head_config, &obj_head_config);
894
895 obj = bpf__prepare_load(bpf_file_name, source);
896 if (IS_ERR(obj)) {
897 char errbuf[BUFSIZ];
898
899 err = PTR_ERR(obj);
900
901 if (err == -ENOTSUP)
902 snprintf(errbuf, sizeof(errbuf),
903 "BPF support is not compiled");
904 else
905 bpf__strerror_prepare_load(bpf_file_name,
906 source,
907 -err, errbuf,
908 sizeof(errbuf));
909
910 parse_events__handle_error(parse_state->error, 0,
911 strdup(errbuf), strdup("(add -v to see detail)"));
912 return err;
913 }
914
915 err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
916 if (err)
917 return err;
918 err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
919
920 /*
921 * Caller doesn't know anything about obj_head_config,
922 * so combine them together again before returning.
923 */
924 if (head_config)
925 list_splice_tail(&obj_head_config, head_config);
926 return err;
927 }
928 #else // HAVE_LIBBPF_SUPPORT
parse_events_load_bpf_obj(struct parse_events_state * parse_state,struct list_head * list __maybe_unused,struct bpf_object * obj __maybe_unused,struct list_head * head_config __maybe_unused)929 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
930 struct list_head *list __maybe_unused,
931 struct bpf_object *obj __maybe_unused,
932 struct list_head *head_config __maybe_unused)
933 {
934 parse_events__handle_error(parse_state->error, 0,
935 strdup("BPF support is not compiled"),
936 strdup("Make sure libbpf-devel is available at build time."));
937 return -ENOTSUP;
938 }
939
parse_events_load_bpf(struct parse_events_state * parse_state,struct list_head * list __maybe_unused,char * bpf_file_name __maybe_unused,bool source __maybe_unused,struct list_head * head_config __maybe_unused)940 int parse_events_load_bpf(struct parse_events_state *parse_state,
941 struct list_head *list __maybe_unused,
942 char *bpf_file_name __maybe_unused,
943 bool source __maybe_unused,
944 struct list_head *head_config __maybe_unused)
945 {
946 parse_events__handle_error(parse_state->error, 0,
947 strdup("BPF support is not compiled"),
948 strdup("Make sure libbpf-devel is available at build time."));
949 return -ENOTSUP;
950 }
951 #endif // HAVE_LIBBPF_SUPPORT
952
953 static int
parse_breakpoint_type(const char * type,struct perf_event_attr * attr)954 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
955 {
956 int i;
957
958 for (i = 0; i < 3; i++) {
959 if (!type || !type[i])
960 break;
961
962 #define CHECK_SET_TYPE(bit) \
963 do { \
964 if (attr->bp_type & bit) \
965 return -EINVAL; \
966 else \
967 attr->bp_type |= bit; \
968 } while (0)
969
970 switch (type[i]) {
971 case 'r':
972 CHECK_SET_TYPE(HW_BREAKPOINT_R);
973 break;
974 case 'w':
975 CHECK_SET_TYPE(HW_BREAKPOINT_W);
976 break;
977 case 'x':
978 CHECK_SET_TYPE(HW_BREAKPOINT_X);
979 break;
980 default:
981 return -EINVAL;
982 }
983 }
984
985 #undef CHECK_SET_TYPE
986
987 if (!attr->bp_type) /* Default */
988 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
989
990 return 0;
991 }
992
parse_events_add_breakpoint(struct list_head * list,int * idx,u64 addr,char * type,u64 len)993 int parse_events_add_breakpoint(struct list_head *list, int *idx,
994 u64 addr, char *type, u64 len)
995 {
996 struct perf_event_attr attr;
997
998 memset(&attr, 0, sizeof(attr));
999 attr.bp_addr = addr;
1000
1001 if (parse_breakpoint_type(type, &attr))
1002 return -EINVAL;
1003
1004 /* Provide some defaults if len is not specified */
1005 if (!len) {
1006 if (attr.bp_type == HW_BREAKPOINT_X)
1007 len = sizeof(long);
1008 else
1009 len = HW_BREAKPOINT_LEN_4;
1010 }
1011
1012 attr.bp_len = len;
1013
1014 attr.type = PERF_TYPE_BREAKPOINT;
1015 attr.sample_period = 1;
1016
1017 return add_event(list, idx, &attr, NULL, NULL);
1018 }
1019
check_type_val(struct parse_events_term * term,struct parse_events_error * err,int type)1020 static int check_type_val(struct parse_events_term *term,
1021 struct parse_events_error *err,
1022 int type)
1023 {
1024 if (type == term->type_val)
1025 return 0;
1026
1027 if (err) {
1028 parse_events__handle_error(err, term->err_val,
1029 type == PARSE_EVENTS__TERM_TYPE_NUM
1030 ? strdup("expected numeric value")
1031 : strdup("expected string value"),
1032 NULL);
1033 }
1034 return -EINVAL;
1035 }
1036
1037 /*
1038 * Update according to parse-events.l
1039 */
1040 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
1041 [PARSE_EVENTS__TERM_TYPE_USER] = "<sysfs term>",
1042 [PARSE_EVENTS__TERM_TYPE_CONFIG] = "config",
1043 [PARSE_EVENTS__TERM_TYPE_CONFIG1] = "config1",
1044 [PARSE_EVENTS__TERM_TYPE_CONFIG2] = "config2",
1045 [PARSE_EVENTS__TERM_TYPE_NAME] = "name",
1046 [PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD] = "period",
1047 [PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ] = "freq",
1048 [PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE] = "branch_type",
1049 [PARSE_EVENTS__TERM_TYPE_TIME] = "time",
1050 [PARSE_EVENTS__TERM_TYPE_CALLGRAPH] = "call-graph",
1051 [PARSE_EVENTS__TERM_TYPE_STACKSIZE] = "stack-size",
1052 [PARSE_EVENTS__TERM_TYPE_NOINHERIT] = "no-inherit",
1053 [PARSE_EVENTS__TERM_TYPE_INHERIT] = "inherit",
1054 [PARSE_EVENTS__TERM_TYPE_MAX_STACK] = "max-stack",
1055 [PARSE_EVENTS__TERM_TYPE_MAX_EVENTS] = "nr",
1056 [PARSE_EVENTS__TERM_TYPE_OVERWRITE] = "overwrite",
1057 [PARSE_EVENTS__TERM_TYPE_NOOVERWRITE] = "no-overwrite",
1058 [PARSE_EVENTS__TERM_TYPE_DRV_CFG] = "driver-config",
1059 [PARSE_EVENTS__TERM_TYPE_PERCORE] = "percore",
1060 [PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT] = "aux-output",
1061 [PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE] = "aux-sample-size",
1062 };
1063
1064 static bool config_term_shrinked;
1065
1066 static bool
config_term_avail(int term_type,struct parse_events_error * err)1067 config_term_avail(int term_type, struct parse_events_error *err)
1068 {
1069 char *err_str;
1070
1071 if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
1072 parse_events__handle_error(err, -1,
1073 strdup("Invalid term_type"), NULL);
1074 return false;
1075 }
1076 if (!config_term_shrinked)
1077 return true;
1078
1079 switch (term_type) {
1080 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1081 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1082 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1083 case PARSE_EVENTS__TERM_TYPE_NAME:
1084 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1085 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1086 return true;
1087 default:
1088 if (!err)
1089 return false;
1090
1091 /* term_type is validated so indexing is safe */
1092 if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
1093 config_term_names[term_type]) >= 0)
1094 parse_events__handle_error(err, -1, err_str, NULL);
1095 return false;
1096 }
1097 }
1098
parse_events__shrink_config_terms(void)1099 void parse_events__shrink_config_terms(void)
1100 {
1101 config_term_shrinked = true;
1102 }
1103
config_term_common(struct perf_event_attr * attr,struct parse_events_term * term,struct parse_events_error * err)1104 static int config_term_common(struct perf_event_attr *attr,
1105 struct parse_events_term *term,
1106 struct parse_events_error *err)
1107 {
1108 #define CHECK_TYPE_VAL(type) \
1109 do { \
1110 if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1111 return -EINVAL; \
1112 } while (0)
1113
1114 switch (term->type_term) {
1115 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1116 CHECK_TYPE_VAL(NUM);
1117 attr->config = term->val.num;
1118 break;
1119 case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1120 CHECK_TYPE_VAL(NUM);
1121 attr->config1 = term->val.num;
1122 break;
1123 case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1124 CHECK_TYPE_VAL(NUM);
1125 attr->config2 = term->val.num;
1126 break;
1127 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1128 CHECK_TYPE_VAL(NUM);
1129 break;
1130 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1131 CHECK_TYPE_VAL(NUM);
1132 break;
1133 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1134 CHECK_TYPE_VAL(STR);
1135 if (strcmp(term->val.str, "no") &&
1136 parse_branch_str(term->val.str,
1137 &attr->branch_sample_type)) {
1138 parse_events__handle_error(err, term->err_val,
1139 strdup("invalid branch sample type"),
1140 NULL);
1141 return -EINVAL;
1142 }
1143 break;
1144 case PARSE_EVENTS__TERM_TYPE_TIME:
1145 CHECK_TYPE_VAL(NUM);
1146 if (term->val.num > 1) {
1147 parse_events__handle_error(err, term->err_val,
1148 strdup("expected 0 or 1"),
1149 NULL);
1150 return -EINVAL;
1151 }
1152 break;
1153 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1154 CHECK_TYPE_VAL(STR);
1155 break;
1156 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1157 CHECK_TYPE_VAL(NUM);
1158 break;
1159 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1160 CHECK_TYPE_VAL(NUM);
1161 break;
1162 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1163 CHECK_TYPE_VAL(NUM);
1164 break;
1165 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1166 CHECK_TYPE_VAL(NUM);
1167 break;
1168 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1169 CHECK_TYPE_VAL(NUM);
1170 break;
1171 case PARSE_EVENTS__TERM_TYPE_NAME:
1172 CHECK_TYPE_VAL(STR);
1173 break;
1174 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1175 CHECK_TYPE_VAL(NUM);
1176 break;
1177 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1178 CHECK_TYPE_VAL(NUM);
1179 break;
1180 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1181 CHECK_TYPE_VAL(NUM);
1182 if ((unsigned int)term->val.num > 1) {
1183 parse_events__handle_error(err, term->err_val,
1184 strdup("expected 0 or 1"),
1185 NULL);
1186 return -EINVAL;
1187 }
1188 break;
1189 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1190 CHECK_TYPE_VAL(NUM);
1191 break;
1192 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1193 CHECK_TYPE_VAL(NUM);
1194 if (term->val.num > UINT_MAX) {
1195 parse_events__handle_error(err, term->err_val,
1196 strdup("too big"),
1197 NULL);
1198 return -EINVAL;
1199 }
1200 break;
1201 default:
1202 parse_events__handle_error(err, term->err_term,
1203 strdup("unknown term"),
1204 parse_events_formats_error_string(NULL));
1205 return -EINVAL;
1206 }
1207
1208 /*
1209 * Check term availability after basic checking so
1210 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1211 *
1212 * If check availability at the entry of this function,
1213 * user will see "'<sysfs term>' is not usable in 'perf stat'"
1214 * if an invalid config term is provided for legacy events
1215 * (for example, instructions/badterm/...), which is confusing.
1216 */
1217 if (!config_term_avail(term->type_term, err))
1218 return -EINVAL;
1219 return 0;
1220 #undef CHECK_TYPE_VAL
1221 }
1222
config_term_pmu(struct perf_event_attr * attr,struct parse_events_term * term,struct parse_events_error * err)1223 static int config_term_pmu(struct perf_event_attr *attr,
1224 struct parse_events_term *term,
1225 struct parse_events_error *err)
1226 {
1227 if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1228 term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1229 /*
1230 * Always succeed for sysfs terms, as we dont know
1231 * at this point what type they need to have.
1232 */
1233 return 0;
1234 else
1235 return config_term_common(attr, term, err);
1236 }
1237
config_term_tracepoint(struct perf_event_attr * attr,struct parse_events_term * term,struct parse_events_error * err)1238 static int config_term_tracepoint(struct perf_event_attr *attr,
1239 struct parse_events_term *term,
1240 struct parse_events_error *err)
1241 {
1242 switch (term->type_term) {
1243 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1244 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1245 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1246 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1247 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1248 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1249 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1250 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1251 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1252 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1253 return config_term_common(attr, term, err);
1254 default:
1255 if (err) {
1256 parse_events__handle_error(err, term->err_term,
1257 strdup("unknown term"),
1258 strdup("valid terms: call-graph,stack-size\n"));
1259 }
1260 return -EINVAL;
1261 }
1262
1263 return 0;
1264 }
1265
config_attr(struct perf_event_attr * attr,struct list_head * head,struct parse_events_error * err,config_term_func_t config_term)1266 static int config_attr(struct perf_event_attr *attr,
1267 struct list_head *head,
1268 struct parse_events_error *err,
1269 config_term_func_t config_term)
1270 {
1271 struct parse_events_term *term;
1272
1273 list_for_each_entry(term, head, list)
1274 if (config_term(attr, term, err))
1275 return -EINVAL;
1276
1277 return 0;
1278 }
1279
get_config_terms(struct list_head * head_config,struct list_head * head_terms __maybe_unused)1280 static int get_config_terms(struct list_head *head_config,
1281 struct list_head *head_terms __maybe_unused)
1282 {
1283 #define ADD_CONFIG_TERM(__type, __weak) \
1284 struct evsel_config_term *__t; \
1285 \
1286 __t = zalloc(sizeof(*__t)); \
1287 if (!__t) \
1288 return -ENOMEM; \
1289 \
1290 INIT_LIST_HEAD(&__t->list); \
1291 __t->type = EVSEL__CONFIG_TERM_ ## __type; \
1292 __t->weak = __weak; \
1293 list_add_tail(&__t->list, head_terms)
1294
1295 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak) \
1296 do { \
1297 ADD_CONFIG_TERM(__type, __weak); \
1298 __t->val.__name = __val; \
1299 } while (0)
1300
1301 #define ADD_CONFIG_TERM_STR(__type, __val, __weak) \
1302 do { \
1303 ADD_CONFIG_TERM(__type, __weak); \
1304 __t->val.str = strdup(__val); \
1305 if (!__t->val.str) { \
1306 zfree(&__t); \
1307 return -ENOMEM; \
1308 } \
1309 __t->free_str = true; \
1310 } while (0)
1311
1312 struct parse_events_term *term;
1313
1314 list_for_each_entry(term, head_config, list) {
1315 switch (term->type_term) {
1316 case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1317 ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1318 break;
1319 case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1320 ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1321 break;
1322 case PARSE_EVENTS__TERM_TYPE_TIME:
1323 ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1324 break;
1325 case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1326 ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1327 break;
1328 case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1329 ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1330 break;
1331 case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1332 ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1333 term->val.num, term->weak);
1334 break;
1335 case PARSE_EVENTS__TERM_TYPE_INHERIT:
1336 ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1337 term->val.num ? 1 : 0, term->weak);
1338 break;
1339 case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1340 ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1341 term->val.num ? 0 : 1, term->weak);
1342 break;
1343 case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1344 ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1345 term->val.num, term->weak);
1346 break;
1347 case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1348 ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1349 term->val.num, term->weak);
1350 break;
1351 case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1352 ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1353 term->val.num ? 1 : 0, term->weak);
1354 break;
1355 case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1356 ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1357 term->val.num ? 0 : 1, term->weak);
1358 break;
1359 case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1360 ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1361 break;
1362 case PARSE_EVENTS__TERM_TYPE_PERCORE:
1363 ADD_CONFIG_TERM_VAL(PERCORE, percore,
1364 term->val.num ? true : false, term->weak);
1365 break;
1366 case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1367 ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1368 term->val.num ? 1 : 0, term->weak);
1369 break;
1370 case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1371 ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1372 term->val.num, term->weak);
1373 break;
1374 default:
1375 break;
1376 }
1377 }
1378 return 0;
1379 }
1380
1381 /*
1382 * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1383 * each bit of attr->config that the user has changed.
1384 */
get_config_chgs(struct perf_pmu * pmu,struct list_head * head_config,struct list_head * head_terms)1385 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
1386 struct list_head *head_terms)
1387 {
1388 struct parse_events_term *term;
1389 u64 bits = 0;
1390 int type;
1391
1392 list_for_each_entry(term, head_config, list) {
1393 switch (term->type_term) {
1394 case PARSE_EVENTS__TERM_TYPE_USER:
1395 type = perf_pmu__format_type(&pmu->format, term->config);
1396 if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1397 continue;
1398 bits |= perf_pmu__format_bits(&pmu->format, term->config);
1399 break;
1400 case PARSE_EVENTS__TERM_TYPE_CONFIG:
1401 bits = ~(u64)0;
1402 break;
1403 default:
1404 break;
1405 }
1406 }
1407
1408 if (bits)
1409 ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1410
1411 #undef ADD_CONFIG_TERM
1412 return 0;
1413 }
1414
parse_events_add_tracepoint(struct list_head * list,int * idx,const char * sys,const char * event,struct parse_events_error * err,struct list_head * head_config)1415 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1416 const char *sys, const char *event,
1417 struct parse_events_error *err,
1418 struct list_head *head_config)
1419 {
1420 if (head_config) {
1421 struct perf_event_attr attr;
1422
1423 if (config_attr(&attr, head_config, err,
1424 config_term_tracepoint))
1425 return -EINVAL;
1426 }
1427
1428 if (strpbrk(sys, "*?"))
1429 return add_tracepoint_multi_sys(list, idx, sys, event,
1430 err, head_config);
1431 else
1432 return add_tracepoint_event(list, idx, sys, event,
1433 err, head_config);
1434 }
1435
parse_events_add_numeric(struct parse_events_state * parse_state,struct list_head * list,u32 type,u64 config,struct list_head * head_config)1436 int parse_events_add_numeric(struct parse_events_state *parse_state,
1437 struct list_head *list,
1438 u32 type, u64 config,
1439 struct list_head *head_config)
1440 {
1441 struct perf_event_attr attr;
1442 LIST_HEAD(config_terms);
1443 bool hybrid;
1444 int ret;
1445
1446 memset(&attr, 0, sizeof(attr));
1447 attr.type = type;
1448 attr.config = config;
1449
1450 if (head_config) {
1451 if (config_attr(&attr, head_config, parse_state->error,
1452 config_term_common))
1453 return -EINVAL;
1454
1455 if (get_config_terms(head_config, &config_terms))
1456 return -ENOMEM;
1457 }
1458
1459 ret = parse_events__add_numeric_hybrid(parse_state, list, &attr,
1460 get_config_name(head_config),
1461 &config_terms, &hybrid);
1462 if (hybrid)
1463 goto out_free_terms;
1464
1465 ret = add_event(list, &parse_state->idx, &attr,
1466 get_config_name(head_config), &config_terms);
1467 out_free_terms:
1468 free_config_terms(&config_terms);
1469 return ret;
1470 }
1471
parse_events_add_tool(struct parse_events_state * parse_state,struct list_head * list,enum perf_tool_event tool_event)1472 int parse_events_add_tool(struct parse_events_state *parse_state,
1473 struct list_head *list,
1474 enum perf_tool_event tool_event)
1475 {
1476 return add_event_tool(list, &parse_state->idx, tool_event);
1477 }
1478
config_term_percore(struct list_head * config_terms)1479 static bool config_term_percore(struct list_head *config_terms)
1480 {
1481 struct evsel_config_term *term;
1482
1483 list_for_each_entry(term, config_terms, list) {
1484 if (term->type == EVSEL__CONFIG_TERM_PERCORE)
1485 return term->val.percore;
1486 }
1487
1488 return false;
1489 }
1490
parse_events__inside_hybrid_pmu(struct parse_events_state * parse_state,struct list_head * list,char * name,struct list_head * head_config)1491 static int parse_events__inside_hybrid_pmu(struct parse_events_state *parse_state,
1492 struct list_head *list, char *name,
1493 struct list_head *head_config)
1494 {
1495 struct parse_events_term *term;
1496 int ret = -1;
1497
1498 if (parse_state->fake_pmu || !head_config || list_empty(head_config) ||
1499 !perf_pmu__is_hybrid(name)) {
1500 return -1;
1501 }
1502
1503 /*
1504 * More than one term in list.
1505 */
1506 if (head_config->next && head_config->next->next != head_config)
1507 return -1;
1508
1509 term = list_first_entry(head_config, struct parse_events_term, list);
1510 if (term && term->config && strcmp(term->config, "event")) {
1511 ret = parse_events__with_hybrid_pmu(parse_state, term->config,
1512 name, list);
1513 }
1514
1515 return ret;
1516 }
1517
parse_events_add_pmu(struct parse_events_state * parse_state,struct list_head * list,char * name,struct list_head * head_config,bool auto_merge_stats,bool use_alias)1518 int parse_events_add_pmu(struct parse_events_state *parse_state,
1519 struct list_head *list, char *name,
1520 struct list_head *head_config,
1521 bool auto_merge_stats,
1522 bool use_alias)
1523 {
1524 struct perf_event_attr attr;
1525 struct perf_pmu_info info;
1526 struct perf_pmu *pmu;
1527 struct evsel *evsel;
1528 struct parse_events_error *err = parse_state->error;
1529 bool use_uncore_alias;
1530 LIST_HEAD(config_terms);
1531
1532 if (verbose > 1) {
1533 fprintf(stderr, "Attempting to add event pmu '%s' with '",
1534 name);
1535 if (head_config) {
1536 struct parse_events_term *term;
1537
1538 list_for_each_entry(term, head_config, list) {
1539 fprintf(stderr, "%s,", term->config);
1540 }
1541 }
1542 fprintf(stderr, "' that may result in non-fatal errors\n");
1543 }
1544
1545 pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
1546 if (!pmu) {
1547 char *err_str;
1548
1549 if (asprintf(&err_str,
1550 "Cannot find PMU `%s'. Missing kernel support?",
1551 name) >= 0)
1552 parse_events__handle_error(err, 0, err_str, NULL);
1553 return -EINVAL;
1554 }
1555
1556 if (pmu->default_config) {
1557 memcpy(&attr, pmu->default_config,
1558 sizeof(struct perf_event_attr));
1559 } else {
1560 memset(&attr, 0, sizeof(attr));
1561 }
1562
1563 use_uncore_alias = (pmu->is_uncore && use_alias);
1564
1565 if (!head_config) {
1566 attr.type = pmu->type;
1567 evsel = __add_event(list, &parse_state->idx, &attr, true, NULL,
1568 pmu, NULL, auto_merge_stats, NULL);
1569 if (evsel) {
1570 evsel->pmu_name = name ? strdup(name) : NULL;
1571 evsel->use_uncore_alias = use_uncore_alias;
1572 return 0;
1573 } else {
1574 return -ENOMEM;
1575 }
1576 }
1577
1578 if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info))
1579 return -EINVAL;
1580
1581 if (verbose > 1) {
1582 fprintf(stderr, "After aliases, add event pmu '%s' with '",
1583 name);
1584 if (head_config) {
1585 struct parse_events_term *term;
1586
1587 list_for_each_entry(term, head_config, list) {
1588 fprintf(stderr, "%s,", term->config);
1589 }
1590 }
1591 fprintf(stderr, "' that may result in non-fatal errors\n");
1592 }
1593
1594 /*
1595 * Configure hardcoded terms first, no need to check
1596 * return value when called with fail == 0 ;)
1597 */
1598 if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1599 return -EINVAL;
1600
1601 if (get_config_terms(head_config, &config_terms))
1602 return -ENOMEM;
1603
1604 /*
1605 * When using default config, record which bits of attr->config were
1606 * changed by the user.
1607 */
1608 if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
1609 return -ENOMEM;
1610
1611 if (!parse_events__inside_hybrid_pmu(parse_state, list, name,
1612 head_config)) {
1613 return 0;
1614 }
1615
1616 if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1617 free_config_terms(&config_terms);
1618 return -EINVAL;
1619 }
1620
1621 evsel = __add_event(list, &parse_state->idx, &attr, true,
1622 get_config_name(head_config), pmu,
1623 &config_terms, auto_merge_stats, NULL);
1624 if (!evsel)
1625 return -ENOMEM;
1626
1627 if (evsel->name)
1628 evsel->use_config_name = true;
1629
1630 evsel->pmu_name = name ? strdup(name) : NULL;
1631 evsel->use_uncore_alias = use_uncore_alias;
1632 evsel->percore = config_term_percore(&evsel->config_terms);
1633
1634 if (parse_state->fake_pmu)
1635 return 0;
1636
1637 evsel->unit = info.unit;
1638 evsel->scale = info.scale;
1639 evsel->per_pkg = info.per_pkg;
1640 evsel->snapshot = info.snapshot;
1641 evsel->metric_expr = info.metric_expr;
1642 evsel->metric_name = info.metric_name;
1643 return 0;
1644 }
1645
parse_events_multi_pmu_add(struct parse_events_state * parse_state,char * str,struct list_head ** listp)1646 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1647 char *str, struct list_head **listp)
1648 {
1649 struct parse_events_term *term;
1650 struct list_head *list;
1651 struct perf_pmu *pmu = NULL;
1652 int ok = 0;
1653
1654 *listp = NULL;
1655 /* Add it for all PMUs that support the alias */
1656 list = malloc(sizeof(struct list_head));
1657 if (!list)
1658 return -1;
1659 INIT_LIST_HEAD(list);
1660 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1661 struct perf_pmu_alias *alias;
1662
1663 list_for_each_entry(alias, &pmu->aliases, list) {
1664 if (!strcasecmp(alias->name, str)) {
1665 struct list_head *head;
1666 char *config;
1667
1668 head = malloc(sizeof(struct list_head));
1669 if (!head)
1670 return -1;
1671 INIT_LIST_HEAD(head);
1672 config = strdup(str);
1673 if (!config)
1674 return -1;
1675 if (parse_events_term__num(&term,
1676 PARSE_EVENTS__TERM_TYPE_USER,
1677 config, 1, false, &config,
1678 NULL) < 0) {
1679 free(list);
1680 free(config);
1681 return -1;
1682 }
1683 list_add_tail(&term->list, head);
1684
1685 if (!parse_events_add_pmu(parse_state, list,
1686 pmu->name, head,
1687 true, true)) {
1688 pr_debug("%s -> %s/%s/\n", str,
1689 pmu->name, alias->str);
1690 ok++;
1691 }
1692
1693 parse_events_terms__delete(head);
1694 }
1695 }
1696 }
1697 if (!ok) {
1698 free(list);
1699 return -1;
1700 }
1701 *listp = list;
1702 return 0;
1703 }
1704
parse_events__modifier_group(struct list_head * list,char * event_mod)1705 int parse_events__modifier_group(struct list_head *list,
1706 char *event_mod)
1707 {
1708 return parse_events__modifier_event(list, event_mod, true);
1709 }
1710
1711 /*
1712 * Check if the two uncore PMUs are from the same uncore block
1713 * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1714 */
is_same_uncore_block(const char * pmu_name_a,const char * pmu_name_b)1715 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1716 {
1717 char *end_a, *end_b;
1718
1719 end_a = strrchr(pmu_name_a, '_');
1720 end_b = strrchr(pmu_name_b, '_');
1721
1722 if (!end_a || !end_b)
1723 return false;
1724
1725 if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1726 return false;
1727
1728 return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1729 }
1730
1731 static int
parse_events__set_leader_for_uncore_aliase(char * name,struct list_head * list,struct parse_events_state * parse_state)1732 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1733 struct parse_events_state *parse_state)
1734 {
1735 struct evsel *evsel, *leader;
1736 uintptr_t *leaders;
1737 bool is_leader = true;
1738 int i, nr_pmu = 0, total_members, ret = 0;
1739
1740 leader = list_first_entry(list, struct evsel, core.node);
1741 evsel = list_last_entry(list, struct evsel, core.node);
1742 total_members = evsel->core.idx - leader->core.idx + 1;
1743
1744 leaders = calloc(total_members, sizeof(uintptr_t));
1745 if (WARN_ON(!leaders))
1746 return 0;
1747
1748 /*
1749 * Going through the whole group and doing sanity check.
1750 * All members must use alias, and be from the same uncore block.
1751 * Also, storing the leader events in an array.
1752 */
1753 __evlist__for_each_entry(list, evsel) {
1754
1755 /* Only split the uncore group which members use alias */
1756 if (!evsel->use_uncore_alias)
1757 goto out;
1758
1759 /* The events must be from the same uncore block */
1760 if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1761 goto out;
1762
1763 if (!is_leader)
1764 continue;
1765 /*
1766 * If the event's PMU name starts to repeat, it must be a new
1767 * event. That can be used to distinguish the leader from
1768 * other members, even they have the same event name.
1769 */
1770 if ((leader != evsel) &&
1771 !strcmp(leader->pmu_name, evsel->pmu_name)) {
1772 is_leader = false;
1773 continue;
1774 }
1775
1776 /* Store the leader event for each PMU */
1777 leaders[nr_pmu++] = (uintptr_t) evsel;
1778 }
1779
1780 /* only one event alias */
1781 if (nr_pmu == total_members) {
1782 parse_state->nr_groups--;
1783 goto handled;
1784 }
1785
1786 /*
1787 * An uncore event alias is a joint name which means the same event
1788 * runs on all PMUs of a block.
1789 * Perf doesn't support mixed events from different PMUs in the same
1790 * group. The big group has to be split into multiple small groups
1791 * which only include the events from the same PMU.
1792 *
1793 * Here the uncore event aliases must be from the same uncore block.
1794 * The number of PMUs must be same for each alias. The number of new
1795 * small groups equals to the number of PMUs.
1796 * Setting the leader event for corresponding members in each group.
1797 */
1798 i = 0;
1799 __evlist__for_each_entry(list, evsel) {
1800 if (i >= nr_pmu)
1801 i = 0;
1802 evsel__set_leader(evsel, (struct evsel *) leaders[i++]);
1803 }
1804
1805 /* The number of members and group name are same for each group */
1806 for (i = 0; i < nr_pmu; i++) {
1807 evsel = (struct evsel *) leaders[i];
1808 evsel->core.nr_members = total_members / nr_pmu;
1809 evsel->group_name = name ? strdup(name) : NULL;
1810 }
1811
1812 /* Take the new small groups into account */
1813 parse_state->nr_groups += nr_pmu - 1;
1814
1815 handled:
1816 ret = 1;
1817 out:
1818 free(leaders);
1819 return ret;
1820 }
1821
parse_events__set_leader(char * name,struct list_head * list,struct parse_events_state * parse_state)1822 void parse_events__set_leader(char *name, struct list_head *list,
1823 struct parse_events_state *parse_state)
1824 {
1825 struct evsel *leader;
1826
1827 if (list_empty(list)) {
1828 WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1829 return;
1830 }
1831
1832 if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1833 return;
1834
1835 __perf_evlist__set_leader(list);
1836 leader = list_entry(list->next, struct evsel, core.node);
1837 leader->group_name = name ? strdup(name) : NULL;
1838 }
1839
1840 /* list_event is assumed to point to malloc'ed memory */
parse_events_update_lists(struct list_head * list_event,struct list_head * list_all)1841 void parse_events_update_lists(struct list_head *list_event,
1842 struct list_head *list_all)
1843 {
1844 /*
1845 * Called for single event definition. Update the
1846 * 'all event' list, and reinit the 'single event'
1847 * list, for next event definition.
1848 */
1849 list_splice_tail(list_event, list_all);
1850 free(list_event);
1851 }
1852
1853 struct event_modifier {
1854 int eu;
1855 int ek;
1856 int eh;
1857 int eH;
1858 int eG;
1859 int eI;
1860 int precise;
1861 int precise_max;
1862 int exclude_GH;
1863 int sample_read;
1864 int pinned;
1865 int weak;
1866 int exclusive;
1867 int bpf_counter;
1868 };
1869
get_event_modifier(struct event_modifier * mod,char * str,struct evsel * evsel)1870 static int get_event_modifier(struct event_modifier *mod, char *str,
1871 struct evsel *evsel)
1872 {
1873 int eu = evsel ? evsel->core.attr.exclude_user : 0;
1874 int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1875 int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1876 int eH = evsel ? evsel->core.attr.exclude_host : 0;
1877 int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1878 int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1879 int precise = evsel ? evsel->core.attr.precise_ip : 0;
1880 int precise_max = 0;
1881 int sample_read = 0;
1882 int pinned = evsel ? evsel->core.attr.pinned : 0;
1883 int exclusive = evsel ? evsel->core.attr.exclusive : 0;
1884
1885 int exclude = eu | ek | eh;
1886 int exclude_GH = evsel ? evsel->exclude_GH : 0;
1887 int weak = 0;
1888 int bpf_counter = 0;
1889
1890 memset(mod, 0, sizeof(*mod));
1891
1892 while (*str) {
1893 if (*str == 'u') {
1894 if (!exclude)
1895 exclude = eu = ek = eh = 1;
1896 if (!exclude_GH && !perf_guest)
1897 eG = 1;
1898 eu = 0;
1899 } else if (*str == 'k') {
1900 if (!exclude)
1901 exclude = eu = ek = eh = 1;
1902 ek = 0;
1903 } else if (*str == 'h') {
1904 if (!exclude)
1905 exclude = eu = ek = eh = 1;
1906 eh = 0;
1907 } else if (*str == 'G') {
1908 if (!exclude_GH)
1909 exclude_GH = eG = eH = 1;
1910 eG = 0;
1911 } else if (*str == 'H') {
1912 if (!exclude_GH)
1913 exclude_GH = eG = eH = 1;
1914 eH = 0;
1915 } else if (*str == 'I') {
1916 eI = 1;
1917 } else if (*str == 'p') {
1918 precise++;
1919 /* use of precise requires exclude_guest */
1920 if (!exclude_GH)
1921 eG = 1;
1922 } else if (*str == 'P') {
1923 precise_max = 1;
1924 } else if (*str == 'S') {
1925 sample_read = 1;
1926 } else if (*str == 'D') {
1927 pinned = 1;
1928 } else if (*str == 'e') {
1929 exclusive = 1;
1930 } else if (*str == 'W') {
1931 weak = 1;
1932 } else if (*str == 'b') {
1933 bpf_counter = 1;
1934 } else
1935 break;
1936
1937 ++str;
1938 }
1939
1940 /*
1941 * precise ip:
1942 *
1943 * 0 - SAMPLE_IP can have arbitrary skid
1944 * 1 - SAMPLE_IP must have constant skid
1945 * 2 - SAMPLE_IP requested to have 0 skid
1946 * 3 - SAMPLE_IP must have 0 skid
1947 *
1948 * See also PERF_RECORD_MISC_EXACT_IP
1949 */
1950 if (precise > 3)
1951 return -EINVAL;
1952
1953 mod->eu = eu;
1954 mod->ek = ek;
1955 mod->eh = eh;
1956 mod->eH = eH;
1957 mod->eG = eG;
1958 mod->eI = eI;
1959 mod->precise = precise;
1960 mod->precise_max = precise_max;
1961 mod->exclude_GH = exclude_GH;
1962 mod->sample_read = sample_read;
1963 mod->pinned = pinned;
1964 mod->weak = weak;
1965 mod->bpf_counter = bpf_counter;
1966 mod->exclusive = exclusive;
1967
1968 return 0;
1969 }
1970
1971 /*
1972 * Basic modifier sanity check to validate it contains only one
1973 * instance of any modifier (apart from 'p') present.
1974 */
check_modifier(char * str)1975 static int check_modifier(char *str)
1976 {
1977 char *p = str;
1978
1979 /* The sizeof includes 0 byte as well. */
1980 if (strlen(str) > (sizeof("ukhGHpppPSDIWeb") - 1))
1981 return -1;
1982
1983 while (*p) {
1984 if (*p != 'p' && strchr(p + 1, *p))
1985 return -1;
1986 p++;
1987 }
1988
1989 return 0;
1990 }
1991
parse_events__modifier_event(struct list_head * list,char * str,bool add)1992 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1993 {
1994 struct evsel *evsel;
1995 struct event_modifier mod;
1996
1997 if (str == NULL)
1998 return 0;
1999
2000 if (check_modifier(str))
2001 return -EINVAL;
2002
2003 if (!add && get_event_modifier(&mod, str, NULL))
2004 return -EINVAL;
2005
2006 __evlist__for_each_entry(list, evsel) {
2007 if (add && get_event_modifier(&mod, str, evsel))
2008 return -EINVAL;
2009
2010 evsel->core.attr.exclude_user = mod.eu;
2011 evsel->core.attr.exclude_kernel = mod.ek;
2012 evsel->core.attr.exclude_hv = mod.eh;
2013 evsel->core.attr.precise_ip = mod.precise;
2014 evsel->core.attr.exclude_host = mod.eH;
2015 evsel->core.attr.exclude_guest = mod.eG;
2016 evsel->core.attr.exclude_idle = mod.eI;
2017 evsel->exclude_GH = mod.exclude_GH;
2018 evsel->sample_read = mod.sample_read;
2019 evsel->precise_max = mod.precise_max;
2020 evsel->weak_group = mod.weak;
2021 evsel->bpf_counter = mod.bpf_counter;
2022
2023 if (evsel__is_group_leader(evsel)) {
2024 evsel->core.attr.pinned = mod.pinned;
2025 evsel->core.attr.exclusive = mod.exclusive;
2026 }
2027 }
2028
2029 return 0;
2030 }
2031
parse_events_name(struct list_head * list,char * name)2032 int parse_events_name(struct list_head *list, char *name)
2033 {
2034 struct evsel *evsel;
2035
2036 __evlist__for_each_entry(list, evsel) {
2037 if (!evsel->name)
2038 evsel->name = strdup(name);
2039 }
2040
2041 return 0;
2042 }
2043
2044 static int
comp_pmu(const void * p1,const void * p2)2045 comp_pmu(const void *p1, const void *p2)
2046 {
2047 struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
2048 struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
2049
2050 return strcasecmp(pmu1->symbol, pmu2->symbol);
2051 }
2052
perf_pmu__parse_cleanup(void)2053 static void perf_pmu__parse_cleanup(void)
2054 {
2055 if (perf_pmu_events_list_num > 0) {
2056 struct perf_pmu_event_symbol *p;
2057 int i;
2058
2059 for (i = 0; i < perf_pmu_events_list_num; i++) {
2060 p = perf_pmu_events_list + i;
2061 zfree(&p->symbol);
2062 }
2063 zfree(&perf_pmu_events_list);
2064 perf_pmu_events_list_num = 0;
2065 }
2066 }
2067
2068 #define SET_SYMBOL(str, stype) \
2069 do { \
2070 p->symbol = str; \
2071 if (!p->symbol) \
2072 goto err; \
2073 p->type = stype; \
2074 } while (0)
2075
2076 /*
2077 * Read the pmu events list from sysfs
2078 * Save it into perf_pmu_events_list
2079 */
perf_pmu__parse_init(void)2080 static void perf_pmu__parse_init(void)
2081 {
2082
2083 struct perf_pmu *pmu = NULL;
2084 struct perf_pmu_alias *alias;
2085 int len = 0;
2086
2087 pmu = NULL;
2088 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2089 list_for_each_entry(alias, &pmu->aliases, list) {
2090 if (strchr(alias->name, '-'))
2091 len++;
2092 len++;
2093 }
2094 }
2095
2096 if (len == 0) {
2097 perf_pmu_events_list_num = -1;
2098 return;
2099 }
2100 perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
2101 if (!perf_pmu_events_list)
2102 return;
2103 perf_pmu_events_list_num = len;
2104
2105 len = 0;
2106 pmu = NULL;
2107 while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2108 list_for_each_entry(alias, &pmu->aliases, list) {
2109 struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
2110 char *tmp = strchr(alias->name, '-');
2111
2112 if (tmp != NULL) {
2113 SET_SYMBOL(strndup(alias->name, tmp - alias->name),
2114 PMU_EVENT_SYMBOL_PREFIX);
2115 p++;
2116 SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
2117 len += 2;
2118 } else {
2119 SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
2120 len++;
2121 }
2122 }
2123 }
2124 qsort(perf_pmu_events_list, len,
2125 sizeof(struct perf_pmu_event_symbol), comp_pmu);
2126
2127 return;
2128 err:
2129 perf_pmu__parse_cleanup();
2130 }
2131
2132 /*
2133 * This function injects special term in
2134 * perf_pmu_events_list so the test code
2135 * can check on this functionality.
2136 */
perf_pmu__test_parse_init(void)2137 int perf_pmu__test_parse_init(void)
2138 {
2139 struct perf_pmu_event_symbol *list;
2140
2141 list = malloc(sizeof(*list) * 1);
2142 if (!list)
2143 return -ENOMEM;
2144
2145 list->type = PMU_EVENT_SYMBOL;
2146 list->symbol = strdup("read");
2147
2148 if (!list->symbol) {
2149 free(list);
2150 return -ENOMEM;
2151 }
2152
2153 perf_pmu_events_list = list;
2154 perf_pmu_events_list_num = 1;
2155 return 0;
2156 }
2157
2158 enum perf_pmu_event_symbol_type
perf_pmu__parse_check(const char * name)2159 perf_pmu__parse_check(const char *name)
2160 {
2161 struct perf_pmu_event_symbol p, *r;
2162
2163 /* scan kernel pmu events from sysfs if needed */
2164 if (perf_pmu_events_list_num == 0)
2165 perf_pmu__parse_init();
2166 /*
2167 * name "cpu" could be prefix of cpu-cycles or cpu// events.
2168 * cpu-cycles has been handled by hardcode.
2169 * So it must be cpu// events, not kernel pmu event.
2170 */
2171 if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
2172 return PMU_EVENT_SYMBOL_ERR;
2173
2174 p.symbol = strdup(name);
2175 r = bsearch(&p, perf_pmu_events_list,
2176 (size_t) perf_pmu_events_list_num,
2177 sizeof(struct perf_pmu_event_symbol), comp_pmu);
2178 zfree(&p.symbol);
2179 return r ? r->type : PMU_EVENT_SYMBOL_ERR;
2180 }
2181
parse_events__scanner(const char * str,struct parse_events_state * parse_state)2182 static int parse_events__scanner(const char *str,
2183 struct parse_events_state *parse_state)
2184 {
2185 YY_BUFFER_STATE buffer;
2186 void *scanner;
2187 int ret;
2188
2189 ret = parse_events_lex_init_extra(parse_state, &scanner);
2190 if (ret)
2191 return ret;
2192
2193 buffer = parse_events__scan_string(str, scanner);
2194
2195 #ifdef PARSER_DEBUG
2196 parse_events_debug = 1;
2197 parse_events_set_debug(1, scanner);
2198 #endif
2199 ret = parse_events_parse(parse_state, scanner);
2200
2201 parse_events__flush_buffer(buffer, scanner);
2202 parse_events__delete_buffer(buffer, scanner);
2203 parse_events_lex_destroy(scanner);
2204 return ret;
2205 }
2206
2207 /*
2208 * parse event config string, return a list of event terms.
2209 */
parse_events_terms(struct list_head * terms,const char * str)2210 int parse_events_terms(struct list_head *terms, const char *str)
2211 {
2212 struct parse_events_state parse_state = {
2213 .terms = NULL,
2214 .stoken = PE_START_TERMS,
2215 };
2216 int ret;
2217
2218 ret = parse_events__scanner(str, &parse_state);
2219 perf_pmu__parse_cleanup();
2220
2221 if (!ret) {
2222 list_splice(parse_state.terms, terms);
2223 zfree(&parse_state.terms);
2224 return 0;
2225 }
2226
2227 parse_events_terms__delete(parse_state.terms);
2228 return ret;
2229 }
2230
parse_events__with_hybrid_pmu(struct parse_events_state * parse_state,const char * str,char * pmu_name,struct list_head * list)2231 static int parse_events__with_hybrid_pmu(struct parse_events_state *parse_state,
2232 const char *str, char *pmu_name,
2233 struct list_head *list)
2234 {
2235 struct parse_events_state ps = {
2236 .list = LIST_HEAD_INIT(ps.list),
2237 .stoken = PE_START_EVENTS,
2238 .hybrid_pmu_name = pmu_name,
2239 .idx = parse_state->idx,
2240 };
2241 int ret;
2242
2243 ret = parse_events__scanner(str, &ps);
2244 perf_pmu__parse_cleanup();
2245
2246 if (!ret) {
2247 if (!list_empty(&ps.list)) {
2248 list_splice(&ps.list, list);
2249 parse_state->idx = ps.idx;
2250 return 0;
2251 } else
2252 return -1;
2253 }
2254
2255 return ret;
2256 }
2257
__parse_events(struct evlist * evlist,const char * str,struct parse_events_error * err,struct perf_pmu * fake_pmu)2258 int __parse_events(struct evlist *evlist, const char *str,
2259 struct parse_events_error *err, struct perf_pmu *fake_pmu)
2260 {
2261 struct parse_events_state parse_state = {
2262 .list = LIST_HEAD_INIT(parse_state.list),
2263 .idx = evlist->core.nr_entries,
2264 .error = err,
2265 .evlist = evlist,
2266 .stoken = PE_START_EVENTS,
2267 .fake_pmu = fake_pmu,
2268 };
2269 int ret;
2270
2271 ret = parse_events__scanner(str, &parse_state);
2272 perf_pmu__parse_cleanup();
2273
2274 if (!ret && list_empty(&parse_state.list)) {
2275 WARN_ONCE(true, "WARNING: event parser found nothing\n");
2276 return -1;
2277 }
2278
2279 /*
2280 * Add list to the evlist even with errors to allow callers to clean up.
2281 */
2282 evlist__splice_list_tail(evlist, &parse_state.list);
2283
2284 if (!ret) {
2285 struct evsel *last;
2286
2287 evlist->core.nr_groups += parse_state.nr_groups;
2288 last = evlist__last(evlist);
2289 last->cmdline_group_boundary = true;
2290
2291 return 0;
2292 }
2293
2294 /*
2295 * There are 2 users - builtin-record and builtin-test objects.
2296 * Both call evlist__delete in case of error, so we dont
2297 * need to bother.
2298 */
2299 return ret;
2300 }
2301
2302 #define MAX_WIDTH 1000
get_term_width(void)2303 static int get_term_width(void)
2304 {
2305 struct winsize ws;
2306
2307 get_term_dimensions(&ws);
2308 return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2309 }
2310
__parse_events_print_error(int err_idx,const char * err_str,const char * err_help,const char * event)2311 static void __parse_events_print_error(int err_idx, const char *err_str,
2312 const char *err_help, const char *event)
2313 {
2314 const char *str = "invalid or unsupported event: ";
2315 char _buf[MAX_WIDTH];
2316 char *buf = (char *) event;
2317 int idx = 0;
2318 if (err_str) {
2319 /* -2 for extra '' in the final fprintf */
2320 int width = get_term_width() - 2;
2321 int len_event = strlen(event);
2322 int len_str, max_len, cut = 0;
2323
2324 /*
2325 * Maximum error index indent, we will cut
2326 * the event string if it's bigger.
2327 */
2328 int max_err_idx = 13;
2329
2330 /*
2331 * Let's be specific with the message when
2332 * we have the precise error.
2333 */
2334 str = "event syntax error: ";
2335 len_str = strlen(str);
2336 max_len = width - len_str;
2337
2338 buf = _buf;
2339
2340 /* We're cutting from the beginning. */
2341 if (err_idx > max_err_idx)
2342 cut = err_idx - max_err_idx;
2343
2344 strncpy(buf, event + cut, max_len);
2345
2346 /* Mark cut parts with '..' on both sides. */
2347 if (cut)
2348 buf[0] = buf[1] = '.';
2349
2350 if ((len_event - cut) > max_len) {
2351 buf[max_len - 1] = buf[max_len - 2] = '.';
2352 buf[max_len] = 0;
2353 }
2354
2355 idx = len_str + err_idx - cut;
2356 }
2357
2358 fprintf(stderr, "%s'%s'\n", str, buf);
2359 if (idx) {
2360 fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2361 if (err_help)
2362 fprintf(stderr, "\n%s\n", err_help);
2363 }
2364 }
2365
parse_events_print_error(struct parse_events_error * err,const char * event)2366 void parse_events_print_error(struct parse_events_error *err,
2367 const char *event)
2368 {
2369 if (!err->num_errors)
2370 return;
2371
2372 __parse_events_print_error(err->idx, err->str, err->help, event);
2373 zfree(&err->str);
2374 zfree(&err->help);
2375
2376 if (err->num_errors > 1) {
2377 fputs("\nInitial error:\n", stderr);
2378 __parse_events_print_error(err->first_idx, err->first_str,
2379 err->first_help, event);
2380 zfree(&err->first_str);
2381 zfree(&err->first_help);
2382 }
2383 }
2384
2385 #undef MAX_WIDTH
2386
parse_events_option(const struct option * opt,const char * str,int unset __maybe_unused)2387 int parse_events_option(const struct option *opt, const char *str,
2388 int unset __maybe_unused)
2389 {
2390 struct evlist *evlist = *(struct evlist **)opt->value;
2391 struct parse_events_error err;
2392 int ret;
2393
2394 bzero(&err, sizeof(err));
2395 ret = parse_events(evlist, str, &err);
2396
2397 if (ret) {
2398 parse_events_print_error(&err, str);
2399 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2400 }
2401
2402 return ret;
2403 }
2404
parse_events_option_new_evlist(const struct option * opt,const char * str,int unset)2405 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2406 {
2407 struct evlist **evlistp = opt->value;
2408 int ret;
2409
2410 if (*evlistp == NULL) {
2411 *evlistp = evlist__new();
2412
2413 if (*evlistp == NULL) {
2414 fprintf(stderr, "Not enough memory to create evlist\n");
2415 return -1;
2416 }
2417 }
2418
2419 ret = parse_events_option(opt, str, unset);
2420 if (ret) {
2421 evlist__delete(*evlistp);
2422 *evlistp = NULL;
2423 }
2424
2425 return ret;
2426 }
2427
2428 static int
foreach_evsel_in_last_glob(struct evlist * evlist,int (* func)(struct evsel * evsel,const void * arg),const void * arg)2429 foreach_evsel_in_last_glob(struct evlist *evlist,
2430 int (*func)(struct evsel *evsel,
2431 const void *arg),
2432 const void *arg)
2433 {
2434 struct evsel *last = NULL;
2435 int err;
2436
2437 /*
2438 * Don't return when list_empty, give func a chance to report
2439 * error when it found last == NULL.
2440 *
2441 * So no need to WARN here, let *func do this.
2442 */
2443 if (evlist->core.nr_entries > 0)
2444 last = evlist__last(evlist);
2445
2446 do {
2447 err = (*func)(last, arg);
2448 if (err)
2449 return -1;
2450 if (!last)
2451 return 0;
2452
2453 if (last->core.node.prev == &evlist->core.entries)
2454 return 0;
2455 last = list_entry(last->core.node.prev, struct evsel, core.node);
2456 } while (!last->cmdline_group_boundary);
2457
2458 return 0;
2459 }
2460
set_filter(struct evsel * evsel,const void * arg)2461 static int set_filter(struct evsel *evsel, const void *arg)
2462 {
2463 const char *str = arg;
2464 bool found = false;
2465 int nr_addr_filters = 0;
2466 struct perf_pmu *pmu = NULL;
2467
2468 if (evsel == NULL) {
2469 fprintf(stderr,
2470 "--filter option should follow a -e tracepoint or HW tracer option\n");
2471 return -1;
2472 }
2473
2474 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2475 if (evsel__append_tp_filter(evsel, str) < 0) {
2476 fprintf(stderr,
2477 "not enough memory to hold filter string\n");
2478 return -1;
2479 }
2480
2481 return 0;
2482 }
2483
2484 while ((pmu = perf_pmu__scan(pmu)) != NULL)
2485 if (pmu->type == evsel->core.attr.type) {
2486 found = true;
2487 break;
2488 }
2489
2490 if (found)
2491 perf_pmu__scan_file(pmu, "nr_addr_filters",
2492 "%d", &nr_addr_filters);
2493
2494 if (!nr_addr_filters) {
2495 fprintf(stderr,
2496 "This CPU does not support address filtering\n");
2497 return -1;
2498 }
2499
2500 if (evsel__append_addr_filter(evsel, str) < 0) {
2501 fprintf(stderr,
2502 "not enough memory to hold filter string\n");
2503 return -1;
2504 }
2505
2506 return 0;
2507 }
2508
parse_filter(const struct option * opt,const char * str,int unset __maybe_unused)2509 int parse_filter(const struct option *opt, const char *str,
2510 int unset __maybe_unused)
2511 {
2512 struct evlist *evlist = *(struct evlist **)opt->value;
2513
2514 return foreach_evsel_in_last_glob(evlist, set_filter,
2515 (const void *)str);
2516 }
2517
add_exclude_perf_filter(struct evsel * evsel,const void * arg __maybe_unused)2518 static int add_exclude_perf_filter(struct evsel *evsel,
2519 const void *arg __maybe_unused)
2520 {
2521 char new_filter[64];
2522
2523 if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2524 fprintf(stderr,
2525 "--exclude-perf option should follow a -e tracepoint option\n");
2526 return -1;
2527 }
2528
2529 snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2530
2531 if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2532 fprintf(stderr,
2533 "not enough memory to hold filter string\n");
2534 return -1;
2535 }
2536
2537 return 0;
2538 }
2539
exclude_perf(const struct option * opt,const char * arg __maybe_unused,int unset __maybe_unused)2540 int exclude_perf(const struct option *opt,
2541 const char *arg __maybe_unused,
2542 int unset __maybe_unused)
2543 {
2544 struct evlist *evlist = *(struct evlist **)opt->value;
2545
2546 return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2547 NULL);
2548 }
2549
2550 static const char * const event_type_descriptors[] = {
2551 "Hardware event",
2552 "Software event",
2553 "Tracepoint event",
2554 "Hardware cache event",
2555 "Raw hardware event descriptor",
2556 "Hardware breakpoint",
2557 };
2558
cmp_string(const void * a,const void * b)2559 static int cmp_string(const void *a, const void *b)
2560 {
2561 const char * const *as = a;
2562 const char * const *bs = b;
2563
2564 return strcmp(*as, *bs);
2565 }
2566
2567 /*
2568 * Print the events from <debugfs_mount_point>/tracing/events
2569 */
2570
print_tracepoint_events(const char * subsys_glob,const char * event_glob,bool name_only)2571 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2572 bool name_only)
2573 {
2574 DIR *sys_dir, *evt_dir;
2575 struct dirent *sys_dirent, *evt_dirent;
2576 char evt_path[MAXPATHLEN];
2577 char *dir_path;
2578 char **evt_list = NULL;
2579 unsigned int evt_i = 0, evt_num = 0;
2580 bool evt_num_known = false;
2581
2582 restart:
2583 sys_dir = tracing_events__opendir();
2584 if (!sys_dir)
2585 return;
2586
2587 if (evt_num_known) {
2588 evt_list = zalloc(sizeof(char *) * evt_num);
2589 if (!evt_list)
2590 goto out_close_sys_dir;
2591 }
2592
2593 for_each_subsystem(sys_dir, sys_dirent) {
2594 if (subsys_glob != NULL &&
2595 !strglobmatch(sys_dirent->d_name, subsys_glob))
2596 continue;
2597
2598 dir_path = get_events_file(sys_dirent->d_name);
2599 if (!dir_path)
2600 continue;
2601 evt_dir = opendir(dir_path);
2602 if (!evt_dir)
2603 goto next;
2604
2605 for_each_event(dir_path, evt_dir, evt_dirent) {
2606 if (event_glob != NULL &&
2607 !strglobmatch(evt_dirent->d_name, event_glob))
2608 continue;
2609
2610 if (!evt_num_known) {
2611 evt_num++;
2612 continue;
2613 }
2614
2615 snprintf(evt_path, MAXPATHLEN, "%s:%s",
2616 sys_dirent->d_name, evt_dirent->d_name);
2617
2618 evt_list[evt_i] = strdup(evt_path);
2619 if (evt_list[evt_i] == NULL) {
2620 put_events_file(dir_path);
2621 goto out_close_evt_dir;
2622 }
2623 evt_i++;
2624 }
2625 closedir(evt_dir);
2626 next:
2627 put_events_file(dir_path);
2628 }
2629 closedir(sys_dir);
2630
2631 if (!evt_num_known) {
2632 evt_num_known = true;
2633 goto restart;
2634 }
2635 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2636 evt_i = 0;
2637 while (evt_i < evt_num) {
2638 if (name_only) {
2639 printf("%s ", evt_list[evt_i++]);
2640 continue;
2641 }
2642 printf(" %-50s [%s]\n", evt_list[evt_i++],
2643 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2644 }
2645 if (evt_num && pager_in_use())
2646 printf("\n");
2647
2648 out_free:
2649 evt_num = evt_i;
2650 for (evt_i = 0; evt_i < evt_num; evt_i++)
2651 zfree(&evt_list[evt_i]);
2652 zfree(&evt_list);
2653 return;
2654
2655 out_close_evt_dir:
2656 closedir(evt_dir);
2657 out_close_sys_dir:
2658 closedir(sys_dir);
2659
2660 printf("FATAL: not enough memory to print %s\n",
2661 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2662 if (evt_list)
2663 goto out_free;
2664 }
2665
2666 /*
2667 * Check whether event is in <debugfs_mount_point>/tracing/events
2668 */
2669
is_valid_tracepoint(const char * event_string)2670 int is_valid_tracepoint(const char *event_string)
2671 {
2672 DIR *sys_dir, *evt_dir;
2673 struct dirent *sys_dirent, *evt_dirent;
2674 char evt_path[MAXPATHLEN];
2675 char *dir_path;
2676
2677 sys_dir = tracing_events__opendir();
2678 if (!sys_dir)
2679 return 0;
2680
2681 for_each_subsystem(sys_dir, sys_dirent) {
2682 dir_path = get_events_file(sys_dirent->d_name);
2683 if (!dir_path)
2684 continue;
2685 evt_dir = opendir(dir_path);
2686 if (!evt_dir)
2687 goto next;
2688
2689 for_each_event(dir_path, evt_dir, evt_dirent) {
2690 snprintf(evt_path, MAXPATHLEN, "%s:%s",
2691 sys_dirent->d_name, evt_dirent->d_name);
2692 if (!strcmp(evt_path, event_string)) {
2693 closedir(evt_dir);
2694 closedir(sys_dir);
2695 return 1;
2696 }
2697 }
2698 closedir(evt_dir);
2699 next:
2700 put_events_file(dir_path);
2701 }
2702 closedir(sys_dir);
2703 return 0;
2704 }
2705
is_event_supported(u8 type,unsigned config)2706 static bool is_event_supported(u8 type, unsigned config)
2707 {
2708 bool ret = true;
2709 int open_return;
2710 struct evsel *evsel;
2711 struct perf_event_attr attr = {
2712 .type = type,
2713 .config = config,
2714 .disabled = 1,
2715 };
2716 struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2717
2718 if (tmap == NULL)
2719 return false;
2720
2721 evsel = evsel__new(&attr);
2722 if (evsel) {
2723 open_return = evsel__open(evsel, NULL, tmap);
2724 ret = open_return >= 0;
2725
2726 if (open_return == -EACCES) {
2727 /*
2728 * This happens if the paranoid value
2729 * /proc/sys/kernel/perf_event_paranoid is set to 2
2730 * Re-run with exclude_kernel set; we don't do that
2731 * by default as some ARM machines do not support it.
2732 *
2733 */
2734 evsel->core.attr.exclude_kernel = 1;
2735 ret = evsel__open(evsel, NULL, tmap) >= 0;
2736 }
2737 evsel__delete(evsel);
2738 }
2739
2740 perf_thread_map__put(tmap);
2741 return ret;
2742 }
2743
print_sdt_events(const char * subsys_glob,const char * event_glob,bool name_only)2744 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2745 bool name_only)
2746 {
2747 struct probe_cache *pcache;
2748 struct probe_cache_entry *ent;
2749 struct strlist *bidlist, *sdtlist;
2750 struct strlist_config cfg = {.dont_dupstr = true};
2751 struct str_node *nd, *nd2;
2752 char *buf, *path, *ptr = NULL;
2753 bool show_detail = false;
2754 int ret;
2755
2756 sdtlist = strlist__new(NULL, &cfg);
2757 if (!sdtlist) {
2758 pr_debug("Failed to allocate new strlist for SDT\n");
2759 return;
2760 }
2761 bidlist = build_id_cache__list_all(true);
2762 if (!bidlist) {
2763 pr_debug("Failed to get buildids: %d\n", errno);
2764 return;
2765 }
2766 strlist__for_each_entry(nd, bidlist) {
2767 pcache = probe_cache__new(nd->s, NULL);
2768 if (!pcache)
2769 continue;
2770 list_for_each_entry(ent, &pcache->entries, node) {
2771 if (!ent->sdt)
2772 continue;
2773 if (subsys_glob &&
2774 !strglobmatch(ent->pev.group, subsys_glob))
2775 continue;
2776 if (event_glob &&
2777 !strglobmatch(ent->pev.event, event_glob))
2778 continue;
2779 ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2780 ent->pev.event, nd->s);
2781 if (ret > 0)
2782 strlist__add(sdtlist, buf);
2783 }
2784 probe_cache__delete(pcache);
2785 }
2786 strlist__delete(bidlist);
2787
2788 strlist__for_each_entry(nd, sdtlist) {
2789 buf = strchr(nd->s, '@');
2790 if (buf)
2791 *(buf++) = '\0';
2792 if (name_only) {
2793 printf("%s ", nd->s);
2794 continue;
2795 }
2796 nd2 = strlist__next(nd);
2797 if (nd2) {
2798 ptr = strchr(nd2->s, '@');
2799 if (ptr)
2800 *ptr = '\0';
2801 if (strcmp(nd->s, nd2->s) == 0)
2802 show_detail = true;
2803 }
2804 if (show_detail) {
2805 path = build_id_cache__origname(buf);
2806 ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2807 if (ret > 0) {
2808 printf(" %-50s [%s]\n", buf, "SDT event");
2809 free(buf);
2810 }
2811 free(path);
2812 } else
2813 printf(" %-50s [%s]\n", nd->s, "SDT event");
2814 if (nd2) {
2815 if (strcmp(nd->s, nd2->s) != 0)
2816 show_detail = false;
2817 if (ptr)
2818 *ptr = '@';
2819 }
2820 }
2821 strlist__delete(sdtlist);
2822 }
2823
print_hwcache_events(const char * event_glob,bool name_only)2824 int print_hwcache_events(const char *event_glob, bool name_only)
2825 {
2826 unsigned int type, op, i, evt_i = 0, evt_num = 0;
2827 char name[64];
2828 char **evt_list = NULL;
2829 bool evt_num_known = false;
2830
2831 restart:
2832 if (evt_num_known) {
2833 evt_list = zalloc(sizeof(char *) * evt_num);
2834 if (!evt_list)
2835 goto out_enomem;
2836 }
2837
2838 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2839 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2840 /* skip invalid cache type */
2841 if (!evsel__is_cache_op_valid(type, op))
2842 continue;
2843
2844 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2845 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
2846 if (event_glob != NULL && !strglobmatch(name, event_glob))
2847 continue;
2848
2849 if (!is_event_supported(PERF_TYPE_HW_CACHE,
2850 type | (op << 8) | (i << 16)))
2851 continue;
2852
2853 if (!evt_num_known) {
2854 evt_num++;
2855 continue;
2856 }
2857
2858 evt_list[evt_i] = strdup(name);
2859 if (evt_list[evt_i] == NULL)
2860 goto out_enomem;
2861 evt_i++;
2862 }
2863 }
2864 }
2865
2866 if (!evt_num_known) {
2867 evt_num_known = true;
2868 goto restart;
2869 }
2870 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2871 evt_i = 0;
2872 while (evt_i < evt_num) {
2873 if (name_only) {
2874 printf("%s ", evt_list[evt_i++]);
2875 continue;
2876 }
2877 printf(" %-50s [%s]\n", evt_list[evt_i++],
2878 event_type_descriptors[PERF_TYPE_HW_CACHE]);
2879 }
2880 if (evt_num && pager_in_use())
2881 printf("\n");
2882
2883 out_free:
2884 evt_num = evt_i;
2885 for (evt_i = 0; evt_i < evt_num; evt_i++)
2886 zfree(&evt_list[evt_i]);
2887 zfree(&evt_list);
2888 return evt_num;
2889
2890 out_enomem:
2891 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2892 if (evt_list)
2893 goto out_free;
2894 return evt_num;
2895 }
2896
print_tool_event(const char * name,const char * event_glob,bool name_only)2897 static void print_tool_event(const char *name, const char *event_glob,
2898 bool name_only)
2899 {
2900 if (event_glob && !strglobmatch(name, event_glob))
2901 return;
2902 if (name_only)
2903 printf("%s ", name);
2904 else
2905 printf(" %-50s [%s]\n", name, "Tool event");
2906
2907 }
2908
print_tool_events(const char * event_glob,bool name_only)2909 void print_tool_events(const char *event_glob, bool name_only)
2910 {
2911 print_tool_event("duration_time", event_glob, name_only);
2912 if (pager_in_use())
2913 printf("\n");
2914 }
2915
print_symbol_events(const char * event_glob,unsigned type,struct event_symbol * syms,unsigned max,bool name_only)2916 void print_symbol_events(const char *event_glob, unsigned type,
2917 struct event_symbol *syms, unsigned max,
2918 bool name_only)
2919 {
2920 unsigned int i, evt_i = 0, evt_num = 0;
2921 char name[MAX_NAME_LEN];
2922 char **evt_list = NULL;
2923 bool evt_num_known = false;
2924
2925 restart:
2926 if (evt_num_known) {
2927 evt_list = zalloc(sizeof(char *) * evt_num);
2928 if (!evt_list)
2929 goto out_enomem;
2930 syms -= max;
2931 }
2932
2933 for (i = 0; i < max; i++, syms++) {
2934 /*
2935 * New attr.config still not supported here, the latest
2936 * example was PERF_COUNT_SW_CGROUP_SWITCHES
2937 */
2938 if (syms->symbol == NULL)
2939 continue;
2940
2941 if (event_glob != NULL && !(strglobmatch(syms->symbol, event_glob) ||
2942 (syms->alias && strglobmatch(syms->alias, event_glob))))
2943 continue;
2944
2945 if (!is_event_supported(type, i))
2946 continue;
2947
2948 if (!evt_num_known) {
2949 evt_num++;
2950 continue;
2951 }
2952
2953 if (!name_only && strlen(syms->alias))
2954 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2955 else
2956 strlcpy(name, syms->symbol, MAX_NAME_LEN);
2957
2958 evt_list[evt_i] = strdup(name);
2959 if (evt_list[evt_i] == NULL)
2960 goto out_enomem;
2961 evt_i++;
2962 }
2963
2964 if (!evt_num_known) {
2965 evt_num_known = true;
2966 goto restart;
2967 }
2968 qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2969 evt_i = 0;
2970 while (evt_i < evt_num) {
2971 if (name_only) {
2972 printf("%s ", evt_list[evt_i++]);
2973 continue;
2974 }
2975 printf(" %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2976 }
2977 if (evt_num && pager_in_use())
2978 printf("\n");
2979
2980 out_free:
2981 evt_num = evt_i;
2982 for (evt_i = 0; evt_i < evt_num; evt_i++)
2983 zfree(&evt_list[evt_i]);
2984 zfree(&evt_list);
2985 return;
2986
2987 out_enomem:
2988 printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2989 if (evt_list)
2990 goto out_free;
2991 }
2992
2993 /*
2994 * Print the help text for the event symbols:
2995 */
print_events(const char * event_glob,bool name_only,bool quiet_flag,bool long_desc,bool details_flag,bool deprecated)2996 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2997 bool long_desc, bool details_flag, bool deprecated)
2998 {
2999 print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
3000 event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
3001
3002 print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
3003 event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
3004 print_tool_events(event_glob, name_only);
3005
3006 print_hwcache_events(event_glob, name_only);
3007
3008 print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
3009 details_flag, deprecated);
3010
3011 if (event_glob != NULL)
3012 return;
3013
3014 if (!name_only) {
3015 printf(" %-50s [%s]\n",
3016 "rNNN",
3017 event_type_descriptors[PERF_TYPE_RAW]);
3018 printf(" %-50s [%s]\n",
3019 "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
3020 event_type_descriptors[PERF_TYPE_RAW]);
3021 if (pager_in_use())
3022 printf(" (see 'man perf-list' on how to encode it)\n\n");
3023
3024 printf(" %-50s [%s]\n",
3025 "mem:<addr>[/len][:access]",
3026 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
3027 if (pager_in_use())
3028 printf("\n");
3029 }
3030
3031 print_tracepoint_events(NULL, NULL, name_only);
3032
3033 print_sdt_events(NULL, NULL, name_only);
3034
3035 metricgroup__print(true, true, NULL, name_only, details_flag);
3036
3037 print_libpfm_events(name_only, long_desc);
3038 }
3039
parse_events__is_hardcoded_term(struct parse_events_term * term)3040 int parse_events__is_hardcoded_term(struct parse_events_term *term)
3041 {
3042 return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
3043 }
3044
new_term(struct parse_events_term ** _term,struct parse_events_term * temp,char * str,u64 num)3045 static int new_term(struct parse_events_term **_term,
3046 struct parse_events_term *temp,
3047 char *str, u64 num)
3048 {
3049 struct parse_events_term *term;
3050
3051 term = malloc(sizeof(*term));
3052 if (!term)
3053 return -ENOMEM;
3054
3055 *term = *temp;
3056 INIT_LIST_HEAD(&term->list);
3057 term->weak = false;
3058
3059 switch (term->type_val) {
3060 case PARSE_EVENTS__TERM_TYPE_NUM:
3061 term->val.num = num;
3062 break;
3063 case PARSE_EVENTS__TERM_TYPE_STR:
3064 term->val.str = str;
3065 break;
3066 default:
3067 free(term);
3068 return -EINVAL;
3069 }
3070
3071 *_term = term;
3072 return 0;
3073 }
3074
parse_events_term__num(struct parse_events_term ** term,int type_term,char * config,u64 num,bool no_value,void * loc_term_,void * loc_val_)3075 int parse_events_term__num(struct parse_events_term **term,
3076 int type_term, char *config, u64 num,
3077 bool no_value,
3078 void *loc_term_, void *loc_val_)
3079 {
3080 YYLTYPE *loc_term = loc_term_;
3081 YYLTYPE *loc_val = loc_val_;
3082
3083 struct parse_events_term temp = {
3084 .type_val = PARSE_EVENTS__TERM_TYPE_NUM,
3085 .type_term = type_term,
3086 .config = config,
3087 .no_value = no_value,
3088 .err_term = loc_term ? loc_term->first_column : 0,
3089 .err_val = loc_val ? loc_val->first_column : 0,
3090 };
3091
3092 return new_term(term, &temp, NULL, num);
3093 }
3094
parse_events_term__str(struct parse_events_term ** term,int type_term,char * config,char * str,void * loc_term_,void * loc_val_)3095 int parse_events_term__str(struct parse_events_term **term,
3096 int type_term, char *config, char *str,
3097 void *loc_term_, void *loc_val_)
3098 {
3099 YYLTYPE *loc_term = loc_term_;
3100 YYLTYPE *loc_val = loc_val_;
3101
3102 struct parse_events_term temp = {
3103 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
3104 .type_term = type_term,
3105 .config = config,
3106 .err_term = loc_term ? loc_term->first_column : 0,
3107 .err_val = loc_val ? loc_val->first_column : 0,
3108 };
3109
3110 return new_term(term, &temp, str, 0);
3111 }
3112
parse_events_term__sym_hw(struct parse_events_term ** term,char * config,unsigned idx)3113 int parse_events_term__sym_hw(struct parse_events_term **term,
3114 char *config, unsigned idx)
3115 {
3116 struct event_symbol *sym;
3117 char *str;
3118 struct parse_events_term temp = {
3119 .type_val = PARSE_EVENTS__TERM_TYPE_STR,
3120 .type_term = PARSE_EVENTS__TERM_TYPE_USER,
3121 .config = config,
3122 };
3123
3124 if (!temp.config) {
3125 temp.config = strdup("event");
3126 if (!temp.config)
3127 return -ENOMEM;
3128 }
3129 BUG_ON(idx >= PERF_COUNT_HW_MAX);
3130 sym = &event_symbols_hw[idx];
3131
3132 str = strdup(sym->symbol);
3133 if (!str)
3134 return -ENOMEM;
3135 return new_term(term, &temp, str, 0);
3136 }
3137
parse_events_term__clone(struct parse_events_term ** new,struct parse_events_term * term)3138 int parse_events_term__clone(struct parse_events_term **new,
3139 struct parse_events_term *term)
3140 {
3141 char *str;
3142 struct parse_events_term temp = {
3143 .type_val = term->type_val,
3144 .type_term = term->type_term,
3145 .config = NULL,
3146 .err_term = term->err_term,
3147 .err_val = term->err_val,
3148 };
3149
3150 if (term->config) {
3151 temp.config = strdup(term->config);
3152 if (!temp.config)
3153 return -ENOMEM;
3154 }
3155 if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
3156 return new_term(new, &temp, NULL, term->val.num);
3157
3158 str = strdup(term->val.str);
3159 if (!str)
3160 return -ENOMEM;
3161 return new_term(new, &temp, str, 0);
3162 }
3163
parse_events_term__delete(struct parse_events_term * term)3164 void parse_events_term__delete(struct parse_events_term *term)
3165 {
3166 if (term->array.nr_ranges)
3167 zfree(&term->array.ranges);
3168
3169 if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
3170 zfree(&term->val.str);
3171
3172 zfree(&term->config);
3173 free(term);
3174 }
3175
parse_events_copy_term_list(struct list_head * old,struct list_head ** new)3176 int parse_events_copy_term_list(struct list_head *old,
3177 struct list_head **new)
3178 {
3179 struct parse_events_term *term, *n;
3180 int ret;
3181
3182 if (!old) {
3183 *new = NULL;
3184 return 0;
3185 }
3186
3187 *new = malloc(sizeof(struct list_head));
3188 if (!*new)
3189 return -ENOMEM;
3190 INIT_LIST_HEAD(*new);
3191
3192 list_for_each_entry (term, old, list) {
3193 ret = parse_events_term__clone(&n, term);
3194 if (ret)
3195 return ret;
3196 list_add_tail(&n->list, *new);
3197 }
3198 return 0;
3199 }
3200
parse_events_terms__purge(struct list_head * terms)3201 void parse_events_terms__purge(struct list_head *terms)
3202 {
3203 struct parse_events_term *term, *h;
3204
3205 list_for_each_entry_safe(term, h, terms, list) {
3206 list_del_init(&term->list);
3207 parse_events_term__delete(term);
3208 }
3209 }
3210
parse_events_terms__delete(struct list_head * terms)3211 void parse_events_terms__delete(struct list_head *terms)
3212 {
3213 if (!terms)
3214 return;
3215 parse_events_terms__purge(terms);
3216 free(terms);
3217 }
3218
parse_events__clear_array(struct parse_events_array * a)3219 void parse_events__clear_array(struct parse_events_array *a)
3220 {
3221 zfree(&a->ranges);
3222 }
3223
parse_events_evlist_error(struct parse_events_state * parse_state,int idx,const char * str)3224 void parse_events_evlist_error(struct parse_events_state *parse_state,
3225 int idx, const char *str)
3226 {
3227 if (!parse_state->error)
3228 return;
3229
3230 parse_events__handle_error(parse_state->error, idx, strdup(str), NULL);
3231 }
3232
config_terms_list(char * buf,size_t buf_sz)3233 static void config_terms_list(char *buf, size_t buf_sz)
3234 {
3235 int i;
3236 bool first = true;
3237
3238 buf[0] = '\0';
3239 for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
3240 const char *name = config_term_names[i];
3241
3242 if (!config_term_avail(i, NULL))
3243 continue;
3244 if (!name)
3245 continue;
3246 if (name[0] == '<')
3247 continue;
3248
3249 if (strlen(buf) + strlen(name) + 2 >= buf_sz)
3250 return;
3251
3252 if (!first)
3253 strcat(buf, ",");
3254 else
3255 first = false;
3256 strcat(buf, name);
3257 }
3258 }
3259
3260 /*
3261 * Return string contains valid config terms of an event.
3262 * @additional_terms: For terms such as PMU sysfs terms.
3263 */
parse_events_formats_error_string(char * additional_terms)3264 char *parse_events_formats_error_string(char *additional_terms)
3265 {
3266 char *str;
3267 /* "no-overwrite" is the longest name */
3268 char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
3269 (sizeof("no-overwrite") - 1)];
3270
3271 config_terms_list(static_terms, sizeof(static_terms));
3272 /* valid terms */
3273 if (additional_terms) {
3274 if (asprintf(&str, "valid terms: %s,%s",
3275 additional_terms, static_terms) < 0)
3276 goto fail;
3277 } else {
3278 if (asprintf(&str, "valid terms: %s", static_terms) < 0)
3279 goto fail;
3280 }
3281 return str;
3282
3283 fail:
3284 return NULL;
3285 }
3286
parse_events__add_event_hybrid(struct list_head * list,int * idx,struct perf_event_attr * attr,char * name,struct perf_pmu * pmu,struct list_head * config_terms)3287 struct evsel *parse_events__add_event_hybrid(struct list_head *list, int *idx,
3288 struct perf_event_attr *attr,
3289 char *name, struct perf_pmu *pmu,
3290 struct list_head *config_terms)
3291 {
3292 return __add_event(list, idx, attr, true, name, pmu,
3293 config_terms, false, NULL);
3294 }
3295
