xref: /openbmc/linux/tools/perf/util/parse-events.c (revision 9a8f3203)
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_MAX_EVENTS]		= "nr",
930 	[PARSE_EVENTS__TERM_TYPE_OVERWRITE]		= "overwrite",
931 	[PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]		= "no-overwrite",
932 	[PARSE_EVENTS__TERM_TYPE_DRV_CFG]		= "driver-config",
933 };
934 
935 static bool config_term_shrinked;
936 
937 static bool
938 config_term_avail(int term_type, struct parse_events_error *err)
939 {
940 	if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
941 		err->str = strdup("Invalid term_type");
942 		return false;
943 	}
944 	if (!config_term_shrinked)
945 		return true;
946 
947 	switch (term_type) {
948 	case PARSE_EVENTS__TERM_TYPE_CONFIG:
949 	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
950 	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
951 	case PARSE_EVENTS__TERM_TYPE_NAME:
952 	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
953 		return true;
954 	default:
955 		if (!err)
956 			return false;
957 
958 		/* term_type is validated so indexing is safe */
959 		if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
960 			     config_term_names[term_type]) < 0)
961 			err->str = NULL;
962 		return false;
963 	}
964 }
965 
966 void parse_events__shrink_config_terms(void)
967 {
968 	config_term_shrinked = true;
969 }
970 
971 static int config_term_common(struct perf_event_attr *attr,
972 			      struct parse_events_term *term,
973 			      struct parse_events_error *err)
974 {
975 #define CHECK_TYPE_VAL(type)						   \
976 do {									   \
977 	if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
978 		return -EINVAL;						   \
979 } while (0)
980 
981 	switch (term->type_term) {
982 	case PARSE_EVENTS__TERM_TYPE_CONFIG:
983 		CHECK_TYPE_VAL(NUM);
984 		attr->config = term->val.num;
985 		break;
986 	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
987 		CHECK_TYPE_VAL(NUM);
988 		attr->config1 = term->val.num;
989 		break;
990 	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
991 		CHECK_TYPE_VAL(NUM);
992 		attr->config2 = term->val.num;
993 		break;
994 	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
995 		CHECK_TYPE_VAL(NUM);
996 		break;
997 	case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
998 		CHECK_TYPE_VAL(NUM);
999 		break;
1000 	case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1001 		CHECK_TYPE_VAL(STR);
1002 		if (strcmp(term->val.str, "no") &&
1003 		    parse_branch_str(term->val.str, &attr->branch_sample_type)) {
1004 			err->str = strdup("invalid branch sample type");
1005 			err->idx = term->err_val;
1006 			return -EINVAL;
1007 		}
1008 		break;
1009 	case PARSE_EVENTS__TERM_TYPE_TIME:
1010 		CHECK_TYPE_VAL(NUM);
1011 		if (term->val.num > 1) {
1012 			err->str = strdup("expected 0 or 1");
1013 			err->idx = term->err_val;
1014 			return -EINVAL;
1015 		}
1016 		break;
1017 	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1018 		CHECK_TYPE_VAL(STR);
1019 		break;
1020 	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1021 		CHECK_TYPE_VAL(NUM);
1022 		break;
1023 	case PARSE_EVENTS__TERM_TYPE_INHERIT:
1024 		CHECK_TYPE_VAL(NUM);
1025 		break;
1026 	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1027 		CHECK_TYPE_VAL(NUM);
1028 		break;
1029 	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1030 		CHECK_TYPE_VAL(NUM);
1031 		break;
1032 	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1033 		CHECK_TYPE_VAL(NUM);
1034 		break;
1035 	case PARSE_EVENTS__TERM_TYPE_NAME:
1036 		CHECK_TYPE_VAL(STR);
1037 		break;
1038 	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1039 		CHECK_TYPE_VAL(NUM);
1040 		break;
1041 	case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1042 		CHECK_TYPE_VAL(NUM);
1043 		break;
1044 	default:
1045 		err->str = strdup("unknown term");
1046 		err->idx = term->err_term;
1047 		err->help = parse_events_formats_error_string(NULL);
1048 		return -EINVAL;
1049 	}
1050 
1051 	/*
1052 	 * Check term availbility after basic checking so
1053 	 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1054 	 *
1055 	 * If check availbility at the entry of this function,
1056 	 * user will see "'<sysfs term>' is not usable in 'perf stat'"
1057 	 * if an invalid config term is provided for legacy events
1058 	 * (for example, instructions/badterm/...), which is confusing.
1059 	 */
1060 	if (!config_term_avail(term->type_term, err))
1061 		return -EINVAL;
1062 	return 0;
1063 #undef CHECK_TYPE_VAL
1064 }
1065 
1066 static int config_term_pmu(struct perf_event_attr *attr,
1067 			   struct parse_events_term *term,
1068 			   struct parse_events_error *err)
1069 {
1070 	if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1071 	    term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1072 		/*
1073 		 * Always succeed for sysfs terms, as we dont know
1074 		 * at this point what type they need to have.
1075 		 */
1076 		return 0;
1077 	else
1078 		return config_term_common(attr, term, err);
1079 }
1080 
1081 static int config_term_tracepoint(struct perf_event_attr *attr,
1082 				  struct parse_events_term *term,
1083 				  struct parse_events_error *err)
1084 {
1085 	switch (term->type_term) {
1086 	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1087 	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1088 	case PARSE_EVENTS__TERM_TYPE_INHERIT:
1089 	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1090 	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1091 	case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1092 	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1093 	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1094 		return config_term_common(attr, term, err);
1095 	default:
1096 		if (err) {
1097 			err->idx = term->err_term;
1098 			err->str = strdup("unknown term");
1099 			err->help = strdup("valid terms: call-graph,stack-size\n");
1100 		}
1101 		return -EINVAL;
1102 	}
1103 
1104 	return 0;
1105 }
1106 
1107 static int config_attr(struct perf_event_attr *attr,
1108 		       struct list_head *head,
1109 		       struct parse_events_error *err,
1110 		       config_term_func_t config_term)
1111 {
1112 	struct parse_events_term *term;
1113 
1114 	list_for_each_entry(term, head, list)
1115 		if (config_term(attr, term, err))
1116 			return -EINVAL;
1117 
1118 	return 0;
1119 }
1120 
1121 static int get_config_terms(struct list_head *head_config,
1122 			    struct list_head *head_terms __maybe_unused)
1123 {
1124 #define ADD_CONFIG_TERM(__type, __name, __val)			\
1125 do {								\
1126 	struct perf_evsel_config_term *__t;			\
1127 								\
1128 	__t = zalloc(sizeof(*__t));				\
1129 	if (!__t)						\
1130 		return -ENOMEM;					\
1131 								\
1132 	INIT_LIST_HEAD(&__t->list);				\
1133 	__t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;	\
1134 	__t->val.__name = __val;				\
1135 	__t->weak	= term->weak;				\
1136 	list_add_tail(&__t->list, head_terms);			\
1137 } while (0)
1138 
1139 	struct parse_events_term *term;
1140 
1141 	list_for_each_entry(term, head_config, list) {
1142 		switch (term->type_term) {
1143 		case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1144 			ADD_CONFIG_TERM(PERIOD, period, term->val.num);
1145 			break;
1146 		case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1147 			ADD_CONFIG_TERM(FREQ, freq, term->val.num);
1148 			break;
1149 		case PARSE_EVENTS__TERM_TYPE_TIME:
1150 			ADD_CONFIG_TERM(TIME, time, term->val.num);
1151 			break;
1152 		case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1153 			ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
1154 			break;
1155 		case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1156 			ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
1157 			break;
1158 		case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1159 			ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
1160 			break;
1161 		case PARSE_EVENTS__TERM_TYPE_INHERIT:
1162 			ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
1163 			break;
1164 		case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1165 			ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
1166 			break;
1167 		case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1168 			ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
1169 			break;
1170 		case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1171 			ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num);
1172 			break;
1173 		case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1174 			ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
1175 			break;
1176 		case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1177 			ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
1178 			break;
1179 		case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1180 			ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
1181 			break;
1182 		default:
1183 			break;
1184 		}
1185 	}
1186 #undef ADD_EVSEL_CONFIG
1187 	return 0;
1188 }
1189 
1190 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1191 				const char *sys, const char *event,
1192 				struct parse_events_error *err,
1193 				struct list_head *head_config)
1194 {
1195 	if (head_config) {
1196 		struct perf_event_attr attr;
1197 
1198 		if (config_attr(&attr, head_config, err,
1199 				config_term_tracepoint))
1200 			return -EINVAL;
1201 	}
1202 
1203 	if (strpbrk(sys, "*?"))
1204 		return add_tracepoint_multi_sys(list, idx, sys, event,
1205 						err, head_config);
1206 	else
1207 		return add_tracepoint_event(list, idx, sys, event,
1208 					    err, head_config);
1209 }
1210 
1211 int parse_events_add_numeric(struct parse_events_state *parse_state,
1212 			     struct list_head *list,
1213 			     u32 type, u64 config,
1214 			     struct list_head *head_config)
1215 {
1216 	struct perf_event_attr attr;
1217 	LIST_HEAD(config_terms);
1218 
1219 	memset(&attr, 0, sizeof(attr));
1220 	attr.type = type;
1221 	attr.config = config;
1222 
1223 	if (head_config) {
1224 		if (config_attr(&attr, head_config, parse_state->error,
1225 				config_term_common))
1226 			return -EINVAL;
1227 
1228 		if (get_config_terms(head_config, &config_terms))
1229 			return -ENOMEM;
1230 	}
1231 
1232 	return add_event(list, &parse_state->idx, &attr,
1233 			 get_config_name(head_config), &config_terms);
1234 }
1235 
1236 int parse_events_add_pmu(struct parse_events_state *parse_state,
1237 			 struct list_head *list, char *name,
1238 			 struct list_head *head_config,
1239 			 bool auto_merge_stats,
1240 			 bool use_alias)
1241 {
1242 	struct perf_event_attr attr;
1243 	struct perf_pmu_info info;
1244 	struct perf_pmu *pmu;
1245 	struct perf_evsel *evsel;
1246 	struct parse_events_error *err = parse_state->error;
1247 	bool use_uncore_alias;
1248 	LIST_HEAD(config_terms);
1249 
1250 	pmu = perf_pmu__find(name);
1251 	if (!pmu) {
1252 		if (asprintf(&err->str,
1253 				"Cannot find PMU `%s'. Missing kernel support?",
1254 				name) < 0)
1255 			err->str = NULL;
1256 		return -EINVAL;
1257 	}
1258 
1259 	if (pmu->default_config) {
1260 		memcpy(&attr, pmu->default_config,
1261 		       sizeof(struct perf_event_attr));
1262 	} else {
1263 		memset(&attr, 0, sizeof(attr));
1264 	}
1265 
1266 	use_uncore_alias = (pmu->is_uncore && use_alias);
1267 
1268 	if (!head_config) {
1269 		attr.type = pmu->type;
1270 		evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats);
1271 		if (evsel) {
1272 			evsel->pmu_name = name;
1273 			evsel->use_uncore_alias = use_uncore_alias;
1274 			return 0;
1275 		} else {
1276 			return -ENOMEM;
1277 		}
1278 	}
1279 
1280 	if (perf_pmu__check_alias(pmu, head_config, &info))
1281 		return -EINVAL;
1282 
1283 	/*
1284 	 * Configure hardcoded terms first, no need to check
1285 	 * return value when called with fail == 0 ;)
1286 	 */
1287 	if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1288 		return -EINVAL;
1289 
1290 	if (get_config_terms(head_config, &config_terms))
1291 		return -ENOMEM;
1292 
1293 	if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1294 		return -EINVAL;
1295 
1296 	evsel = __add_event(list, &parse_state->idx, &attr,
1297 			    get_config_name(head_config), pmu,
1298 			    &config_terms, auto_merge_stats);
1299 	if (evsel) {
1300 		evsel->unit = info.unit;
1301 		evsel->scale = info.scale;
1302 		evsel->per_pkg = info.per_pkg;
1303 		evsel->snapshot = info.snapshot;
1304 		evsel->metric_expr = info.metric_expr;
1305 		evsel->metric_name = info.metric_name;
1306 		evsel->pmu_name = name;
1307 		evsel->use_uncore_alias = use_uncore_alias;
1308 	}
1309 
1310 	return evsel ? 0 : -ENOMEM;
1311 }
1312 
1313 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1314 			       char *str, struct list_head **listp)
1315 {
1316 	struct list_head *head;
1317 	struct parse_events_term *term;
1318 	struct list_head *list;
1319 	struct perf_pmu *pmu = NULL;
1320 	int ok = 0;
1321 
1322 	*listp = NULL;
1323 	/* Add it for all PMUs that support the alias */
1324 	list = malloc(sizeof(struct list_head));
1325 	if (!list)
1326 		return -1;
1327 	INIT_LIST_HEAD(list);
1328 	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1329 		struct perf_pmu_alias *alias;
1330 
1331 		list_for_each_entry(alias, &pmu->aliases, list) {
1332 			if (!strcasecmp(alias->name, str)) {
1333 				head = malloc(sizeof(struct list_head));
1334 				if (!head)
1335 					return -1;
1336 				INIT_LIST_HEAD(head);
1337 				if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
1338 							   str, 1, false, &str, NULL) < 0)
1339 					return -1;
1340 				list_add_tail(&term->list, head);
1341 
1342 				if (!parse_events_add_pmu(parse_state, list,
1343 							  pmu->name, head,
1344 							  true, true)) {
1345 					pr_debug("%s -> %s/%s/\n", str,
1346 						 pmu->name, alias->str);
1347 					ok++;
1348 				}
1349 
1350 				parse_events_terms__delete(head);
1351 			}
1352 		}
1353 	}
1354 	if (!ok)
1355 		return -1;
1356 	*listp = list;
1357 	return 0;
1358 }
1359 
1360 int parse_events__modifier_group(struct list_head *list,
1361 				 char *event_mod)
1362 {
1363 	return parse_events__modifier_event(list, event_mod, true);
1364 }
1365 
1366 /*
1367  * Check if the two uncore PMUs are from the same uncore block
1368  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1369  */
1370 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1371 {
1372 	char *end_a, *end_b;
1373 
1374 	end_a = strrchr(pmu_name_a, '_');
1375 	end_b = strrchr(pmu_name_b, '_');
1376 
1377 	if (!end_a || !end_b)
1378 		return false;
1379 
1380 	if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1381 		return false;
1382 
1383 	return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1384 }
1385 
1386 static int
1387 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1388 					   struct parse_events_state *parse_state)
1389 {
1390 	struct perf_evsel *evsel, *leader;
1391 	uintptr_t *leaders;
1392 	bool is_leader = true;
1393 	int i, nr_pmu = 0, total_members, ret = 0;
1394 
1395 	leader = list_first_entry(list, struct perf_evsel, node);
1396 	evsel = list_last_entry(list, struct perf_evsel, node);
1397 	total_members = evsel->idx - leader->idx + 1;
1398 
1399 	leaders = calloc(total_members, sizeof(uintptr_t));
1400 	if (WARN_ON(!leaders))
1401 		return 0;
1402 
1403 	/*
1404 	 * Going through the whole group and doing sanity check.
1405 	 * All members must use alias, and be from the same uncore block.
1406 	 * Also, storing the leader events in an array.
1407 	 */
1408 	__evlist__for_each_entry(list, evsel) {
1409 
1410 		/* Only split the uncore group which members use alias */
1411 		if (!evsel->use_uncore_alias)
1412 			goto out;
1413 
1414 		/* The events must be from the same uncore block */
1415 		if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1416 			goto out;
1417 
1418 		if (!is_leader)
1419 			continue;
1420 		/*
1421 		 * If the event's PMU name starts to repeat, it must be a new
1422 		 * event. That can be used to distinguish the leader from
1423 		 * other members, even they have the same event name.
1424 		 */
1425 		if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
1426 			is_leader = false;
1427 			continue;
1428 		}
1429 		/* The name is always alias name */
1430 		WARN_ON(strcmp(leader->name, evsel->name));
1431 
1432 		/* Store the leader event for each PMU */
1433 		leaders[nr_pmu++] = (uintptr_t) evsel;
1434 	}
1435 
1436 	/* only one event alias */
1437 	if (nr_pmu == total_members) {
1438 		parse_state->nr_groups--;
1439 		goto handled;
1440 	}
1441 
1442 	/*
1443 	 * An uncore event alias is a joint name which means the same event
1444 	 * runs on all PMUs of a block.
1445 	 * Perf doesn't support mixed events from different PMUs in the same
1446 	 * group. The big group has to be split into multiple small groups
1447 	 * which only include the events from the same PMU.
1448 	 *
1449 	 * Here the uncore event aliases must be from the same uncore block.
1450 	 * The number of PMUs must be same for each alias. The number of new
1451 	 * small groups equals to the number of PMUs.
1452 	 * Setting the leader event for corresponding members in each group.
1453 	 */
1454 	i = 0;
1455 	__evlist__for_each_entry(list, evsel) {
1456 		if (i >= nr_pmu)
1457 			i = 0;
1458 		evsel->leader = (struct perf_evsel *) leaders[i++];
1459 	}
1460 
1461 	/* The number of members and group name are same for each group */
1462 	for (i = 0; i < nr_pmu; i++) {
1463 		evsel = (struct perf_evsel *) leaders[i];
1464 		evsel->nr_members = total_members / nr_pmu;
1465 		evsel->group_name = name ? strdup(name) : NULL;
1466 	}
1467 
1468 	/* Take the new small groups into account */
1469 	parse_state->nr_groups += nr_pmu - 1;
1470 
1471 handled:
1472 	ret = 1;
1473 out:
1474 	free(leaders);
1475 	return ret;
1476 }
1477 
1478 void parse_events__set_leader(char *name, struct list_head *list,
1479 			      struct parse_events_state *parse_state)
1480 {
1481 	struct perf_evsel *leader;
1482 
1483 	if (list_empty(list)) {
1484 		WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1485 		return;
1486 	}
1487 
1488 	if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1489 		return;
1490 
1491 	__perf_evlist__set_leader(list);
1492 	leader = list_entry(list->next, struct perf_evsel, node);
1493 	leader->group_name = name ? strdup(name) : NULL;
1494 }
1495 
1496 /* list_event is assumed to point to malloc'ed memory */
1497 void parse_events_update_lists(struct list_head *list_event,
1498 			       struct list_head *list_all)
1499 {
1500 	/*
1501 	 * Called for single event definition. Update the
1502 	 * 'all event' list, and reinit the 'single event'
1503 	 * list, for next event definition.
1504 	 */
1505 	list_splice_tail(list_event, list_all);
1506 	free(list_event);
1507 }
1508 
1509 struct event_modifier {
1510 	int eu;
1511 	int ek;
1512 	int eh;
1513 	int eH;
1514 	int eG;
1515 	int eI;
1516 	int precise;
1517 	int precise_max;
1518 	int exclude_GH;
1519 	int sample_read;
1520 	int pinned;
1521 	int weak;
1522 };
1523 
1524 static int get_event_modifier(struct event_modifier *mod, char *str,
1525 			       struct perf_evsel *evsel)
1526 {
1527 	int eu = evsel ? evsel->attr.exclude_user : 0;
1528 	int ek = evsel ? evsel->attr.exclude_kernel : 0;
1529 	int eh = evsel ? evsel->attr.exclude_hv : 0;
1530 	int eH = evsel ? evsel->attr.exclude_host : 0;
1531 	int eG = evsel ? evsel->attr.exclude_guest : 0;
1532 	int eI = evsel ? evsel->attr.exclude_idle : 0;
1533 	int precise = evsel ? evsel->attr.precise_ip : 0;
1534 	int precise_max = 0;
1535 	int sample_read = 0;
1536 	int pinned = evsel ? evsel->attr.pinned : 0;
1537 
1538 	int exclude = eu | ek | eh;
1539 	int exclude_GH = evsel ? evsel->exclude_GH : 0;
1540 	int weak = 0;
1541 
1542 	memset(mod, 0, sizeof(*mod));
1543 
1544 	while (*str) {
1545 		if (*str == 'u') {
1546 			if (!exclude)
1547 				exclude = eu = ek = eh = 1;
1548 			eu = 0;
1549 		} else if (*str == 'k') {
1550 			if (!exclude)
1551 				exclude = eu = ek = eh = 1;
1552 			ek = 0;
1553 		} else if (*str == 'h') {
1554 			if (!exclude)
1555 				exclude = eu = ek = eh = 1;
1556 			eh = 0;
1557 		} else if (*str == 'G') {
1558 			if (!exclude_GH)
1559 				exclude_GH = eG = eH = 1;
1560 			eG = 0;
1561 		} else if (*str == 'H') {
1562 			if (!exclude_GH)
1563 				exclude_GH = eG = eH = 1;
1564 			eH = 0;
1565 		} else if (*str == 'I') {
1566 			eI = 1;
1567 		} else if (*str == 'p') {
1568 			precise++;
1569 			/* use of precise requires exclude_guest */
1570 			if (!exclude_GH)
1571 				eG = 1;
1572 		} else if (*str == 'P') {
1573 			precise_max = 1;
1574 		} else if (*str == 'S') {
1575 			sample_read = 1;
1576 		} else if (*str == 'D') {
1577 			pinned = 1;
1578 		} else if (*str == 'W') {
1579 			weak = 1;
1580 		} else
1581 			break;
1582 
1583 		++str;
1584 	}
1585 
1586 	/*
1587 	 * precise ip:
1588 	 *
1589 	 *  0 - SAMPLE_IP can have arbitrary skid
1590 	 *  1 - SAMPLE_IP must have constant skid
1591 	 *  2 - SAMPLE_IP requested to have 0 skid
1592 	 *  3 - SAMPLE_IP must have 0 skid
1593 	 *
1594 	 *  See also PERF_RECORD_MISC_EXACT_IP
1595 	 */
1596 	if (precise > 3)
1597 		return -EINVAL;
1598 
1599 	mod->eu = eu;
1600 	mod->ek = ek;
1601 	mod->eh = eh;
1602 	mod->eH = eH;
1603 	mod->eG = eG;
1604 	mod->eI = eI;
1605 	mod->precise = precise;
1606 	mod->precise_max = precise_max;
1607 	mod->exclude_GH = exclude_GH;
1608 	mod->sample_read = sample_read;
1609 	mod->pinned = pinned;
1610 	mod->weak = weak;
1611 
1612 	return 0;
1613 }
1614 
1615 /*
1616  * Basic modifier sanity check to validate it contains only one
1617  * instance of any modifier (apart from 'p') present.
1618  */
1619 static int check_modifier(char *str)
1620 {
1621 	char *p = str;
1622 
1623 	/* The sizeof includes 0 byte as well. */
1624 	if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1625 		return -1;
1626 
1627 	while (*p) {
1628 		if (*p != 'p' && strchr(p + 1, *p))
1629 			return -1;
1630 		p++;
1631 	}
1632 
1633 	return 0;
1634 }
1635 
1636 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1637 {
1638 	struct perf_evsel *evsel;
1639 	struct event_modifier mod;
1640 
1641 	if (str == NULL)
1642 		return 0;
1643 
1644 	if (check_modifier(str))
1645 		return -EINVAL;
1646 
1647 	if (!add && get_event_modifier(&mod, str, NULL))
1648 		return -EINVAL;
1649 
1650 	__evlist__for_each_entry(list, evsel) {
1651 		if (add && get_event_modifier(&mod, str, evsel))
1652 			return -EINVAL;
1653 
1654 		evsel->attr.exclude_user   = mod.eu;
1655 		evsel->attr.exclude_kernel = mod.ek;
1656 		evsel->attr.exclude_hv     = mod.eh;
1657 		evsel->attr.precise_ip     = mod.precise;
1658 		evsel->attr.exclude_host   = mod.eH;
1659 		evsel->attr.exclude_guest  = mod.eG;
1660 		evsel->attr.exclude_idle   = mod.eI;
1661 		evsel->exclude_GH          = mod.exclude_GH;
1662 		evsel->sample_read         = mod.sample_read;
1663 		evsel->precise_max         = mod.precise_max;
1664 		evsel->weak_group	   = mod.weak;
1665 
1666 		if (perf_evsel__is_group_leader(evsel))
1667 			evsel->attr.pinned = mod.pinned;
1668 	}
1669 
1670 	return 0;
1671 }
1672 
1673 int parse_events_name(struct list_head *list, char *name)
1674 {
1675 	struct perf_evsel *evsel;
1676 
1677 	__evlist__for_each_entry(list, evsel) {
1678 		if (!evsel->name)
1679 			evsel->name = strdup(name);
1680 	}
1681 
1682 	return 0;
1683 }
1684 
1685 static int
1686 comp_pmu(const void *p1, const void *p2)
1687 {
1688 	struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1689 	struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1690 
1691 	return strcasecmp(pmu1->symbol, pmu2->symbol);
1692 }
1693 
1694 static void perf_pmu__parse_cleanup(void)
1695 {
1696 	if (perf_pmu_events_list_num > 0) {
1697 		struct perf_pmu_event_symbol *p;
1698 		int i;
1699 
1700 		for (i = 0; i < perf_pmu_events_list_num; i++) {
1701 			p = perf_pmu_events_list + i;
1702 			zfree(&p->symbol);
1703 		}
1704 		zfree(&perf_pmu_events_list);
1705 		perf_pmu_events_list_num = 0;
1706 	}
1707 }
1708 
1709 #define SET_SYMBOL(str, stype)		\
1710 do {					\
1711 	p->symbol = str;		\
1712 	if (!p->symbol)			\
1713 		goto err;		\
1714 	p->type = stype;		\
1715 } while (0)
1716 
1717 /*
1718  * Read the pmu events list from sysfs
1719  * Save it into perf_pmu_events_list
1720  */
1721 static void perf_pmu__parse_init(void)
1722 {
1723 
1724 	struct perf_pmu *pmu = NULL;
1725 	struct perf_pmu_alias *alias;
1726 	int len = 0;
1727 
1728 	pmu = NULL;
1729 	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1730 		list_for_each_entry(alias, &pmu->aliases, list) {
1731 			if (strchr(alias->name, '-'))
1732 				len++;
1733 			len++;
1734 		}
1735 	}
1736 
1737 	if (len == 0) {
1738 		perf_pmu_events_list_num = -1;
1739 		return;
1740 	}
1741 	perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1742 	if (!perf_pmu_events_list)
1743 		return;
1744 	perf_pmu_events_list_num = len;
1745 
1746 	len = 0;
1747 	pmu = NULL;
1748 	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1749 		list_for_each_entry(alias, &pmu->aliases, list) {
1750 			struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
1751 			char *tmp = strchr(alias->name, '-');
1752 
1753 			if (tmp != NULL) {
1754 				SET_SYMBOL(strndup(alias->name, tmp - alias->name),
1755 						PMU_EVENT_SYMBOL_PREFIX);
1756 				p++;
1757 				SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
1758 				len += 2;
1759 			} else {
1760 				SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
1761 				len++;
1762 			}
1763 		}
1764 	}
1765 	qsort(perf_pmu_events_list, len,
1766 		sizeof(struct perf_pmu_event_symbol), comp_pmu);
1767 
1768 	return;
1769 err:
1770 	perf_pmu__parse_cleanup();
1771 }
1772 
1773 enum perf_pmu_event_symbol_type
1774 perf_pmu__parse_check(const char *name)
1775 {
1776 	struct perf_pmu_event_symbol p, *r;
1777 
1778 	/* scan kernel pmu events from sysfs if needed */
1779 	if (perf_pmu_events_list_num == 0)
1780 		perf_pmu__parse_init();
1781 	/*
1782 	 * name "cpu" could be prefix of cpu-cycles or cpu// events.
1783 	 * cpu-cycles has been handled by hardcode.
1784 	 * So it must be cpu// events, not kernel pmu event.
1785 	 */
1786 	if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
1787 		return PMU_EVENT_SYMBOL_ERR;
1788 
1789 	p.symbol = strdup(name);
1790 	r = bsearch(&p, perf_pmu_events_list,
1791 			(size_t) perf_pmu_events_list_num,
1792 			sizeof(struct perf_pmu_event_symbol), comp_pmu);
1793 	zfree(&p.symbol);
1794 	return r ? r->type : PMU_EVENT_SYMBOL_ERR;
1795 }
1796 
1797 static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1798 {
1799 	YY_BUFFER_STATE buffer;
1800 	void *scanner;
1801 	int ret;
1802 
1803 	ret = parse_events_lex_init_extra(start_token, &scanner);
1804 	if (ret)
1805 		return ret;
1806 
1807 	buffer = parse_events__scan_string(str, scanner);
1808 
1809 #ifdef PARSER_DEBUG
1810 	parse_events_debug = 1;
1811 #endif
1812 	ret = parse_events_parse(parse_state, scanner);
1813 
1814 	parse_events__flush_buffer(buffer, scanner);
1815 	parse_events__delete_buffer(buffer, scanner);
1816 	parse_events_lex_destroy(scanner);
1817 	return ret;
1818 }
1819 
1820 /*
1821  * parse event config string, return a list of event terms.
1822  */
1823 int parse_events_terms(struct list_head *terms, const char *str)
1824 {
1825 	struct parse_events_state parse_state = {
1826 		.terms = NULL,
1827 	};
1828 	int ret;
1829 
1830 	ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1831 	if (!ret) {
1832 		list_splice(parse_state.terms, terms);
1833 		zfree(&parse_state.terms);
1834 		return 0;
1835 	}
1836 
1837 	parse_events_terms__delete(parse_state.terms);
1838 	return ret;
1839 }
1840 
1841 int parse_events(struct perf_evlist *evlist, const char *str,
1842 		 struct parse_events_error *err)
1843 {
1844 	struct parse_events_state parse_state = {
1845 		.list   = LIST_HEAD_INIT(parse_state.list),
1846 		.idx    = evlist->nr_entries,
1847 		.error  = err,
1848 		.evlist = evlist,
1849 	};
1850 	int ret;
1851 
1852 	ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1853 	perf_pmu__parse_cleanup();
1854 	if (!ret) {
1855 		struct perf_evsel *last;
1856 
1857 		if (list_empty(&parse_state.list)) {
1858 			WARN_ONCE(true, "WARNING: event parser found nothing\n");
1859 			return -1;
1860 		}
1861 
1862 		perf_evlist__splice_list_tail(evlist, &parse_state.list);
1863 		evlist->nr_groups += parse_state.nr_groups;
1864 		last = perf_evlist__last(evlist);
1865 		last->cmdline_group_boundary = true;
1866 
1867 		return 0;
1868 	}
1869 
1870 	/*
1871 	 * There are 2 users - builtin-record and builtin-test objects.
1872 	 * Both call perf_evlist__delete in case of error, so we dont
1873 	 * need to bother.
1874 	 */
1875 	return ret;
1876 }
1877 
1878 #define MAX_WIDTH 1000
1879 static int get_term_width(void)
1880 {
1881 	struct winsize ws;
1882 
1883 	get_term_dimensions(&ws);
1884 	return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
1885 }
1886 
1887 void parse_events_print_error(struct parse_events_error *err,
1888 			      const char *event)
1889 {
1890 	const char *str = "invalid or unsupported event: ";
1891 	char _buf[MAX_WIDTH];
1892 	char *buf = (char *) event;
1893 	int idx = 0;
1894 
1895 	if (err->str) {
1896 		/* -2 for extra '' in the final fprintf */
1897 		int width       = get_term_width() - 2;
1898 		int len_event   = strlen(event);
1899 		int len_str, max_len, cut = 0;
1900 
1901 		/*
1902 		 * Maximum error index indent, we will cut
1903 		 * the event string if it's bigger.
1904 		 */
1905 		int max_err_idx = 13;
1906 
1907 		/*
1908 		 * Let's be specific with the message when
1909 		 * we have the precise error.
1910 		 */
1911 		str     = "event syntax error: ";
1912 		len_str = strlen(str);
1913 		max_len = width - len_str;
1914 
1915 		buf = _buf;
1916 
1917 		/* We're cutting from the beginning. */
1918 		if (err->idx > max_err_idx)
1919 			cut = err->idx - max_err_idx;
1920 
1921 		strncpy(buf, event + cut, max_len);
1922 
1923 		/* Mark cut parts with '..' on both sides. */
1924 		if (cut)
1925 			buf[0] = buf[1] = '.';
1926 
1927 		if ((len_event - cut) > max_len) {
1928 			buf[max_len - 1] = buf[max_len - 2] = '.';
1929 			buf[max_len] = 0;
1930 		}
1931 
1932 		idx = len_str + err->idx - cut;
1933 	}
1934 
1935 	fprintf(stderr, "%s'%s'\n", str, buf);
1936 	if (idx) {
1937 		fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
1938 		if (err->help)
1939 			fprintf(stderr, "\n%s\n", err->help);
1940 		zfree(&err->str);
1941 		zfree(&err->help);
1942 	}
1943 }
1944 
1945 #undef MAX_WIDTH
1946 
1947 int parse_events_option(const struct option *opt, const char *str,
1948 			int unset __maybe_unused)
1949 {
1950 	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1951 	struct parse_events_error err = { .idx = 0, };
1952 	int ret = parse_events(evlist, str, &err);
1953 
1954 	if (ret) {
1955 		parse_events_print_error(&err, str);
1956 		fprintf(stderr, "Run 'perf list' for a list of valid events\n");
1957 	}
1958 
1959 	return ret;
1960 }
1961 
1962 static int
1963 foreach_evsel_in_last_glob(struct perf_evlist *evlist,
1964 			   int (*func)(struct perf_evsel *evsel,
1965 				       const void *arg),
1966 			   const void *arg)
1967 {
1968 	struct perf_evsel *last = NULL;
1969 	int err;
1970 
1971 	/*
1972 	 * Don't return when list_empty, give func a chance to report
1973 	 * error when it found last == NULL.
1974 	 *
1975 	 * So no need to WARN here, let *func do this.
1976 	 */
1977 	if (evlist->nr_entries > 0)
1978 		last = perf_evlist__last(evlist);
1979 
1980 	do {
1981 		err = (*func)(last, arg);
1982 		if (err)
1983 			return -1;
1984 		if (!last)
1985 			return 0;
1986 
1987 		if (last->node.prev == &evlist->entries)
1988 			return 0;
1989 		last = list_entry(last->node.prev, struct perf_evsel, node);
1990 	} while (!last->cmdline_group_boundary);
1991 
1992 	return 0;
1993 }
1994 
1995 static int set_filter(struct perf_evsel *evsel, const void *arg)
1996 {
1997 	const char *str = arg;
1998 	bool found = false;
1999 	int nr_addr_filters = 0;
2000 	struct perf_pmu *pmu = NULL;
2001 
2002 	if (evsel == NULL) {
2003 		fprintf(stderr,
2004 			"--filter option should follow a -e tracepoint or HW tracer option\n");
2005 		return -1;
2006 	}
2007 
2008 	if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
2009 		if (perf_evsel__append_tp_filter(evsel, str) < 0) {
2010 			fprintf(stderr,
2011 				"not enough memory to hold filter string\n");
2012 			return -1;
2013 		}
2014 
2015 		return 0;
2016 	}
2017 
2018 	while ((pmu = perf_pmu__scan(pmu)) != NULL)
2019 		if (pmu->type == evsel->attr.type) {
2020 			found = true;
2021 			break;
2022 		}
2023 
2024 	if (found)
2025 		perf_pmu__scan_file(pmu, "nr_addr_filters",
2026 				    "%d", &nr_addr_filters);
2027 
2028 	if (!nr_addr_filters) {
2029 		fprintf(stderr,
2030 			"This CPU does not support address filtering\n");
2031 		return -1;
2032 	}
2033 
2034 	if (perf_evsel__append_addr_filter(evsel, str) < 0) {
2035 		fprintf(stderr,
2036 			"not enough memory to hold filter string\n");
2037 		return -1;
2038 	}
2039 
2040 	return 0;
2041 }
2042 
2043 int parse_filter(const struct option *opt, const char *str,
2044 		 int unset __maybe_unused)
2045 {
2046 	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
2047 
2048 	return foreach_evsel_in_last_glob(evlist, set_filter,
2049 					  (const void *)str);
2050 }
2051 
2052 static int add_exclude_perf_filter(struct perf_evsel *evsel,
2053 				   const void *arg __maybe_unused)
2054 {
2055 	char new_filter[64];
2056 
2057 	if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
2058 		fprintf(stderr,
2059 			"--exclude-perf option should follow a -e tracepoint option\n");
2060 		return -1;
2061 	}
2062 
2063 	snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2064 
2065 	if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
2066 		fprintf(stderr,
2067 			"not enough memory to hold filter string\n");
2068 		return -1;
2069 	}
2070 
2071 	return 0;
2072 }
2073 
2074 int exclude_perf(const struct option *opt,
2075 		 const char *arg __maybe_unused,
2076 		 int unset __maybe_unused)
2077 {
2078 	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
2079 
2080 	return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2081 					  NULL);
2082 }
2083 
2084 static const char * const event_type_descriptors[] = {
2085 	"Hardware event",
2086 	"Software event",
2087 	"Tracepoint event",
2088 	"Hardware cache event",
2089 	"Raw hardware event descriptor",
2090 	"Hardware breakpoint",
2091 };
2092 
2093 static int cmp_string(const void *a, const void *b)
2094 {
2095 	const char * const *as = a;
2096 	const char * const *bs = b;
2097 
2098 	return strcmp(*as, *bs);
2099 }
2100 
2101 /*
2102  * Print the events from <debugfs_mount_point>/tracing/events
2103  */
2104 
2105 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2106 			     bool name_only)
2107 {
2108 	DIR *sys_dir, *evt_dir;
2109 	struct dirent *sys_dirent, *evt_dirent;
2110 	char evt_path[MAXPATHLEN];
2111 	char *dir_path;
2112 	char **evt_list = NULL;
2113 	unsigned int evt_i = 0, evt_num = 0;
2114 	bool evt_num_known = false;
2115 
2116 restart:
2117 	sys_dir = tracing_events__opendir();
2118 	if (!sys_dir)
2119 		return;
2120 
2121 	if (evt_num_known) {
2122 		evt_list = zalloc(sizeof(char *) * evt_num);
2123 		if (!evt_list)
2124 			goto out_close_sys_dir;
2125 	}
2126 
2127 	for_each_subsystem(sys_dir, sys_dirent) {
2128 		if (subsys_glob != NULL &&
2129 		    !strglobmatch(sys_dirent->d_name, subsys_glob))
2130 			continue;
2131 
2132 		dir_path = get_events_file(sys_dirent->d_name);
2133 		if (!dir_path)
2134 			continue;
2135 		evt_dir = opendir(dir_path);
2136 		if (!evt_dir)
2137 			goto next;
2138 
2139 		for_each_event(dir_path, evt_dir, evt_dirent) {
2140 			if (event_glob != NULL &&
2141 			    !strglobmatch(evt_dirent->d_name, event_glob))
2142 				continue;
2143 
2144 			if (!evt_num_known) {
2145 				evt_num++;
2146 				continue;
2147 			}
2148 
2149 			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2150 				 sys_dirent->d_name, evt_dirent->d_name);
2151 
2152 			evt_list[evt_i] = strdup(evt_path);
2153 			if (evt_list[evt_i] == NULL) {
2154 				put_events_file(dir_path);
2155 				goto out_close_evt_dir;
2156 			}
2157 			evt_i++;
2158 		}
2159 		closedir(evt_dir);
2160 next:
2161 		put_events_file(dir_path);
2162 	}
2163 	closedir(sys_dir);
2164 
2165 	if (!evt_num_known) {
2166 		evt_num_known = true;
2167 		goto restart;
2168 	}
2169 	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2170 	evt_i = 0;
2171 	while (evt_i < evt_num) {
2172 		if (name_only) {
2173 			printf("%s ", evt_list[evt_i++]);
2174 			continue;
2175 		}
2176 		printf("  %-50s [%s]\n", evt_list[evt_i++],
2177 				event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2178 	}
2179 	if (evt_num && pager_in_use())
2180 		printf("\n");
2181 
2182 out_free:
2183 	evt_num = evt_i;
2184 	for (evt_i = 0; evt_i < evt_num; evt_i++)
2185 		zfree(&evt_list[evt_i]);
2186 	zfree(&evt_list);
2187 	return;
2188 
2189 out_close_evt_dir:
2190 	closedir(evt_dir);
2191 out_close_sys_dir:
2192 	closedir(sys_dir);
2193 
2194 	printf("FATAL: not enough memory to print %s\n",
2195 			event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2196 	if (evt_list)
2197 		goto out_free;
2198 }
2199 
2200 /*
2201  * Check whether event is in <debugfs_mount_point>/tracing/events
2202  */
2203 
2204 int is_valid_tracepoint(const char *event_string)
2205 {
2206 	DIR *sys_dir, *evt_dir;
2207 	struct dirent *sys_dirent, *evt_dirent;
2208 	char evt_path[MAXPATHLEN];
2209 	char *dir_path;
2210 
2211 	sys_dir = tracing_events__opendir();
2212 	if (!sys_dir)
2213 		return 0;
2214 
2215 	for_each_subsystem(sys_dir, sys_dirent) {
2216 		dir_path = get_events_file(sys_dirent->d_name);
2217 		if (!dir_path)
2218 			continue;
2219 		evt_dir = opendir(dir_path);
2220 		if (!evt_dir)
2221 			goto next;
2222 
2223 		for_each_event(dir_path, evt_dir, evt_dirent) {
2224 			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2225 				 sys_dirent->d_name, evt_dirent->d_name);
2226 			if (!strcmp(evt_path, event_string)) {
2227 				closedir(evt_dir);
2228 				closedir(sys_dir);
2229 				return 1;
2230 			}
2231 		}
2232 		closedir(evt_dir);
2233 next:
2234 		put_events_file(dir_path);
2235 	}
2236 	closedir(sys_dir);
2237 	return 0;
2238 }
2239 
2240 static bool is_event_supported(u8 type, unsigned config)
2241 {
2242 	bool ret = true;
2243 	int open_return;
2244 	struct perf_evsel *evsel;
2245 	struct perf_event_attr attr = {
2246 		.type = type,
2247 		.config = config,
2248 		.disabled = 1,
2249 	};
2250 	struct thread_map *tmap = thread_map__new_by_tid(0);
2251 
2252 	if (tmap == NULL)
2253 		return false;
2254 
2255 	evsel = perf_evsel__new(&attr);
2256 	if (evsel) {
2257 		open_return = perf_evsel__open(evsel, NULL, tmap);
2258 		ret = open_return >= 0;
2259 
2260 		if (open_return == -EACCES) {
2261 			/*
2262 			 * This happens if the paranoid value
2263 			 * /proc/sys/kernel/perf_event_paranoid is set to 2
2264 			 * Re-run with exclude_kernel set; we don't do that
2265 			 * by default as some ARM machines do not support it.
2266 			 *
2267 			 */
2268 			evsel->attr.exclude_kernel = 1;
2269 			ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2270 		}
2271 		perf_evsel__delete(evsel);
2272 	}
2273 
2274 	thread_map__put(tmap);
2275 	return ret;
2276 }
2277 
2278 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2279 		      bool name_only)
2280 {
2281 	struct probe_cache *pcache;
2282 	struct probe_cache_entry *ent;
2283 	struct strlist *bidlist, *sdtlist;
2284 	struct strlist_config cfg = {.dont_dupstr = true};
2285 	struct str_node *nd, *nd2;
2286 	char *buf, *path, *ptr = NULL;
2287 	bool show_detail = false;
2288 	int ret;
2289 
2290 	sdtlist = strlist__new(NULL, &cfg);
2291 	if (!sdtlist) {
2292 		pr_debug("Failed to allocate new strlist for SDT\n");
2293 		return;
2294 	}
2295 	bidlist = build_id_cache__list_all(true);
2296 	if (!bidlist) {
2297 		pr_debug("Failed to get buildids: %d\n", errno);
2298 		return;
2299 	}
2300 	strlist__for_each_entry(nd, bidlist) {
2301 		pcache = probe_cache__new(nd->s, NULL);
2302 		if (!pcache)
2303 			continue;
2304 		list_for_each_entry(ent, &pcache->entries, node) {
2305 			if (!ent->sdt)
2306 				continue;
2307 			if (subsys_glob &&
2308 			    !strglobmatch(ent->pev.group, subsys_glob))
2309 				continue;
2310 			if (event_glob &&
2311 			    !strglobmatch(ent->pev.event, event_glob))
2312 				continue;
2313 			ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2314 					ent->pev.event, nd->s);
2315 			if (ret > 0)
2316 				strlist__add(sdtlist, buf);
2317 		}
2318 		probe_cache__delete(pcache);
2319 	}
2320 	strlist__delete(bidlist);
2321 
2322 	strlist__for_each_entry(nd, sdtlist) {
2323 		buf = strchr(nd->s, '@');
2324 		if (buf)
2325 			*(buf++) = '\0';
2326 		if (name_only) {
2327 			printf("%s ", nd->s);
2328 			continue;
2329 		}
2330 		nd2 = strlist__next(nd);
2331 		if (nd2) {
2332 			ptr = strchr(nd2->s, '@');
2333 			if (ptr)
2334 				*ptr = '\0';
2335 			if (strcmp(nd->s, nd2->s) == 0)
2336 				show_detail = true;
2337 		}
2338 		if (show_detail) {
2339 			path = build_id_cache__origname(buf);
2340 			ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2341 			if (ret > 0) {
2342 				printf("  %-50s [%s]\n", buf, "SDT event");
2343 				free(buf);
2344 			}
2345 			free(path);
2346 		} else
2347 			printf("  %-50s [%s]\n", nd->s, "SDT event");
2348 		if (nd2) {
2349 			if (strcmp(nd->s, nd2->s) != 0)
2350 				show_detail = false;
2351 			if (ptr)
2352 				*ptr = '@';
2353 		}
2354 	}
2355 	strlist__delete(sdtlist);
2356 }
2357 
2358 int print_hwcache_events(const char *event_glob, bool name_only)
2359 {
2360 	unsigned int type, op, i, evt_i = 0, evt_num = 0;
2361 	char name[64];
2362 	char **evt_list = NULL;
2363 	bool evt_num_known = false;
2364 
2365 restart:
2366 	if (evt_num_known) {
2367 		evt_list = zalloc(sizeof(char *) * evt_num);
2368 		if (!evt_list)
2369 			goto out_enomem;
2370 	}
2371 
2372 	for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2373 		for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2374 			/* skip invalid cache type */
2375 			if (!perf_evsel__is_cache_op_valid(type, op))
2376 				continue;
2377 
2378 			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2379 				__perf_evsel__hw_cache_type_op_res_name(type, op, i,
2380 									name, sizeof(name));
2381 				if (event_glob != NULL && !strglobmatch(name, event_glob))
2382 					continue;
2383 
2384 				if (!is_event_supported(PERF_TYPE_HW_CACHE,
2385 							type | (op << 8) | (i << 16)))
2386 					continue;
2387 
2388 				if (!evt_num_known) {
2389 					evt_num++;
2390 					continue;
2391 				}
2392 
2393 				evt_list[evt_i] = strdup(name);
2394 				if (evt_list[evt_i] == NULL)
2395 					goto out_enomem;
2396 				evt_i++;
2397 			}
2398 		}
2399 	}
2400 
2401 	if (!evt_num_known) {
2402 		evt_num_known = true;
2403 		goto restart;
2404 	}
2405 	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2406 	evt_i = 0;
2407 	while (evt_i < evt_num) {
2408 		if (name_only) {
2409 			printf("%s ", evt_list[evt_i++]);
2410 			continue;
2411 		}
2412 		printf("  %-50s [%s]\n", evt_list[evt_i++],
2413 				event_type_descriptors[PERF_TYPE_HW_CACHE]);
2414 	}
2415 	if (evt_num && pager_in_use())
2416 		printf("\n");
2417 
2418 out_free:
2419 	evt_num = evt_i;
2420 	for (evt_i = 0; evt_i < evt_num; evt_i++)
2421 		zfree(&evt_list[evt_i]);
2422 	zfree(&evt_list);
2423 	return evt_num;
2424 
2425 out_enomem:
2426 	printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2427 	if (evt_list)
2428 		goto out_free;
2429 	return evt_num;
2430 }
2431 
2432 void print_symbol_events(const char *event_glob, unsigned type,
2433 				struct event_symbol *syms, unsigned max,
2434 				bool name_only)
2435 {
2436 	unsigned int i, evt_i = 0, evt_num = 0;
2437 	char name[MAX_NAME_LEN];
2438 	char **evt_list = NULL;
2439 	bool evt_num_known = false;
2440 
2441 restart:
2442 	if (evt_num_known) {
2443 		evt_list = zalloc(sizeof(char *) * evt_num);
2444 		if (!evt_list)
2445 			goto out_enomem;
2446 		syms -= max;
2447 	}
2448 
2449 	for (i = 0; i < max; i++, syms++) {
2450 
2451 		if (event_glob != NULL && syms->symbol != NULL &&
2452 		    !(strglobmatch(syms->symbol, event_glob) ||
2453 		      (syms->alias && strglobmatch(syms->alias, event_glob))))
2454 			continue;
2455 
2456 		if (!is_event_supported(type, i))
2457 			continue;
2458 
2459 		if (!evt_num_known) {
2460 			evt_num++;
2461 			continue;
2462 		}
2463 
2464 		if (!name_only && strlen(syms->alias))
2465 			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2466 		else
2467 			strlcpy(name, syms->symbol, MAX_NAME_LEN);
2468 
2469 		evt_list[evt_i] = strdup(name);
2470 		if (evt_list[evt_i] == NULL)
2471 			goto out_enomem;
2472 		evt_i++;
2473 	}
2474 
2475 	if (!evt_num_known) {
2476 		evt_num_known = true;
2477 		goto restart;
2478 	}
2479 	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2480 	evt_i = 0;
2481 	while (evt_i < evt_num) {
2482 		if (name_only) {
2483 			printf("%s ", evt_list[evt_i++]);
2484 			continue;
2485 		}
2486 		printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2487 	}
2488 	if (evt_num && pager_in_use())
2489 		printf("\n");
2490 
2491 out_free:
2492 	evt_num = evt_i;
2493 	for (evt_i = 0; evt_i < evt_num; evt_i++)
2494 		zfree(&evt_list[evt_i]);
2495 	zfree(&evt_list);
2496 	return;
2497 
2498 out_enomem:
2499 	printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2500 	if (evt_list)
2501 		goto out_free;
2502 }
2503 
2504 /*
2505  * Print the help text for the event symbols:
2506  */
2507 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2508 			bool long_desc, bool details_flag)
2509 {
2510 	print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2511 			    event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2512 
2513 	print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2514 			    event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2515 
2516 	print_hwcache_events(event_glob, name_only);
2517 
2518 	print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2519 			details_flag);
2520 
2521 	if (event_glob != NULL)
2522 		return;
2523 
2524 	if (!name_only) {
2525 		printf("  %-50s [%s]\n",
2526 		       "rNNN",
2527 		       event_type_descriptors[PERF_TYPE_RAW]);
2528 		printf("  %-50s [%s]\n",
2529 		       "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2530 		       event_type_descriptors[PERF_TYPE_RAW]);
2531 		if (pager_in_use())
2532 			printf("   (see 'man perf-list' on how to encode it)\n\n");
2533 
2534 		printf("  %-50s [%s]\n",
2535 		       "mem:<addr>[/len][:access]",
2536 			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2537 		if (pager_in_use())
2538 			printf("\n");
2539 	}
2540 
2541 	print_tracepoint_events(NULL, NULL, name_only);
2542 
2543 	print_sdt_events(NULL, NULL, name_only);
2544 
2545 	metricgroup__print(true, true, NULL, name_only, details_flag);
2546 }
2547 
2548 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2549 {
2550 	return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2551 }
2552 
2553 static int new_term(struct parse_events_term **_term,
2554 		    struct parse_events_term *temp,
2555 		    char *str, u64 num)
2556 {
2557 	struct parse_events_term *term;
2558 
2559 	term = malloc(sizeof(*term));
2560 	if (!term)
2561 		return -ENOMEM;
2562 
2563 	*term = *temp;
2564 	INIT_LIST_HEAD(&term->list);
2565 	term->weak = false;
2566 
2567 	switch (term->type_val) {
2568 	case PARSE_EVENTS__TERM_TYPE_NUM:
2569 		term->val.num = num;
2570 		break;
2571 	case PARSE_EVENTS__TERM_TYPE_STR:
2572 		term->val.str = str;
2573 		break;
2574 	default:
2575 		free(term);
2576 		return -EINVAL;
2577 	}
2578 
2579 	*_term = term;
2580 	return 0;
2581 }
2582 
2583 int parse_events_term__num(struct parse_events_term **term,
2584 			   int type_term, char *config, u64 num,
2585 			   bool no_value,
2586 			   void *loc_term_, void *loc_val_)
2587 {
2588 	YYLTYPE *loc_term = loc_term_;
2589 	YYLTYPE *loc_val = loc_val_;
2590 
2591 	struct parse_events_term temp = {
2592 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2593 		.type_term = type_term,
2594 		.config    = config,
2595 		.no_value  = no_value,
2596 		.err_term  = loc_term ? loc_term->first_column : 0,
2597 		.err_val   = loc_val  ? loc_val->first_column  : 0,
2598 	};
2599 
2600 	return new_term(term, &temp, NULL, num);
2601 }
2602 
2603 int parse_events_term__str(struct parse_events_term **term,
2604 			   int type_term, char *config, char *str,
2605 			   void *loc_term_, void *loc_val_)
2606 {
2607 	YYLTYPE *loc_term = loc_term_;
2608 	YYLTYPE *loc_val = loc_val_;
2609 
2610 	struct parse_events_term temp = {
2611 		.type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2612 		.type_term = type_term,
2613 		.config    = config,
2614 		.err_term  = loc_term ? loc_term->first_column : 0,
2615 		.err_val   = loc_val  ? loc_val->first_column  : 0,
2616 	};
2617 
2618 	return new_term(term, &temp, str, 0);
2619 }
2620 
2621 int parse_events_term__sym_hw(struct parse_events_term **term,
2622 			      char *config, unsigned idx)
2623 {
2624 	struct event_symbol *sym;
2625 	struct parse_events_term temp = {
2626 		.type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2627 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
2628 		.config    = config ?: (char *) "event",
2629 	};
2630 
2631 	BUG_ON(idx >= PERF_COUNT_HW_MAX);
2632 	sym = &event_symbols_hw[idx];
2633 
2634 	return new_term(term, &temp, (char *) sym->symbol, 0);
2635 }
2636 
2637 int parse_events_term__clone(struct parse_events_term **new,
2638 			     struct parse_events_term *term)
2639 {
2640 	struct parse_events_term temp = {
2641 		.type_val  = term->type_val,
2642 		.type_term = term->type_term,
2643 		.config    = term->config,
2644 		.err_term  = term->err_term,
2645 		.err_val   = term->err_val,
2646 	};
2647 
2648 	return new_term(new, &temp, term->val.str, term->val.num);
2649 }
2650 
2651 int parse_events_copy_term_list(struct list_head *old,
2652 				 struct list_head **new)
2653 {
2654 	struct parse_events_term *term, *n;
2655 	int ret;
2656 
2657 	if (!old) {
2658 		*new = NULL;
2659 		return 0;
2660 	}
2661 
2662 	*new = malloc(sizeof(struct list_head));
2663 	if (!*new)
2664 		return -ENOMEM;
2665 	INIT_LIST_HEAD(*new);
2666 
2667 	list_for_each_entry (term, old, list) {
2668 		ret = parse_events_term__clone(&n, term);
2669 		if (ret)
2670 			return ret;
2671 		list_add_tail(&n->list, *new);
2672 	}
2673 	return 0;
2674 }
2675 
2676 void parse_events_terms__purge(struct list_head *terms)
2677 {
2678 	struct parse_events_term *term, *h;
2679 
2680 	list_for_each_entry_safe(term, h, terms, list) {
2681 		if (term->array.nr_ranges)
2682 			zfree(&term->array.ranges);
2683 		list_del_init(&term->list);
2684 		free(term);
2685 	}
2686 }
2687 
2688 void parse_events_terms__delete(struct list_head *terms)
2689 {
2690 	if (!terms)
2691 		return;
2692 	parse_events_terms__purge(terms);
2693 	free(terms);
2694 }
2695 
2696 void parse_events__clear_array(struct parse_events_array *a)
2697 {
2698 	zfree(&a->ranges);
2699 }
2700 
2701 void parse_events_evlist_error(struct parse_events_state *parse_state,
2702 			       int idx, const char *str)
2703 {
2704 	struct parse_events_error *err = parse_state->error;
2705 
2706 	if (!err)
2707 		return;
2708 	err->idx = idx;
2709 	err->str = strdup(str);
2710 	WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
2711 }
2712 
2713 static void config_terms_list(char *buf, size_t buf_sz)
2714 {
2715 	int i;
2716 	bool first = true;
2717 
2718 	buf[0] = '\0';
2719 	for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
2720 		const char *name = config_term_names[i];
2721 
2722 		if (!config_term_avail(i, NULL))
2723 			continue;
2724 		if (!name)
2725 			continue;
2726 		if (name[0] == '<')
2727 			continue;
2728 
2729 		if (strlen(buf) + strlen(name) + 2 >= buf_sz)
2730 			return;
2731 
2732 		if (!first)
2733 			strcat(buf, ",");
2734 		else
2735 			first = false;
2736 		strcat(buf, name);
2737 	}
2738 }
2739 
2740 /*
2741  * Return string contains valid config terms of an event.
2742  * @additional_terms: For terms such as PMU sysfs terms.
2743  */
2744 char *parse_events_formats_error_string(char *additional_terms)
2745 {
2746 	char *str;
2747 	/* "no-overwrite" is the longest name */
2748 	char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
2749 			  (sizeof("no-overwrite") - 1)];
2750 
2751 	config_terms_list(static_terms, sizeof(static_terms));
2752 	/* valid terms */
2753 	if (additional_terms) {
2754 		if (asprintf(&str, "valid terms: %s,%s",
2755 			     additional_terms, static_terms) < 0)
2756 			goto fail;
2757 	} else {
2758 		if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2759 			goto fail;
2760 	}
2761 	return str;
2762 
2763 fail:
2764 	return NULL;
2765 }
2766