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

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

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