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TOMOYO Linux Cross Reference
Linux/tools/perf/util/parse-events.c

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

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