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Linux/tools/perf/util/parse-events.c

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

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