xref: /openbmc/linux/tools/perf/util/parse-events.c (revision f97769fd)
1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/hw_breakpoint.h>
3 #include <linux/err.h>
4 #include <linux/zalloc.h>
5 #include <dirent.h>
6 #include <errno.h>
7 #include <sys/ioctl.h>
8 #include <sys/types.h>
9 #include <sys/stat.h>
10 #include <fcntl.h>
11 #include <sys/param.h>
12 #include "term.h"
13 #include "build-id.h"
14 #include "evlist.h"
15 #include "evsel.h"
16 #include <subcmd/pager.h>
17 #include <subcmd/parse-options.h>
18 #include "parse-events.h"
19 #include <subcmd/exec-cmd.h>
20 #include "string2.h"
21 #include "strlist.h"
22 #include "symbol.h"
23 #include "header.h"
24 #include "bpf-loader.h"
25 #include "debug.h"
26 #include <api/fs/tracing_path.h>
27 #include <perf/cpumap.h>
28 #include "parse-events-bison.h"
29 #define YY_EXTRA_TYPE void*
30 #include "parse-events-flex.h"
31 #include "pmu.h"
32 #include "thread_map.h"
33 #include "probe-file.h"
34 #include "asm/bug.h"
35 #include "util/parse-branch-options.h"
36 #include "metricgroup.h"
37 #include "util/evsel_config.h"
38 #include "util/event.h"
39 #include "util/pfm.h"
40 #include "perf.h"
41 
42 #define MAX_NAME_LEN 100
43 
44 #ifdef PARSER_DEBUG
45 extern int parse_events_debug;
46 #endif
47 int parse_events_parse(void *parse_state, void *scanner);
48 static int get_config_terms(struct list_head *head_config,
49 			    struct list_head *head_terms __maybe_unused);
50 
51 static struct perf_pmu_event_symbol *perf_pmu_events_list;
52 /*
53  * The variable indicates the number of supported pmu event symbols.
54  * 0 means not initialized and ready to init
55  * -1 means failed to init, don't try anymore
56  * >0 is the number of supported pmu event symbols
57  */
58 static int perf_pmu_events_list_num;
59 
60 struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
61 	[PERF_COUNT_HW_CPU_CYCLES] = {
62 		.symbol = "cpu-cycles",
63 		.alias  = "cycles",
64 	},
65 	[PERF_COUNT_HW_INSTRUCTIONS] = {
66 		.symbol = "instructions",
67 		.alias  = "",
68 	},
69 	[PERF_COUNT_HW_CACHE_REFERENCES] = {
70 		.symbol = "cache-references",
71 		.alias  = "",
72 	},
73 	[PERF_COUNT_HW_CACHE_MISSES] = {
74 		.symbol = "cache-misses",
75 		.alias  = "",
76 	},
77 	[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
78 		.symbol = "branch-instructions",
79 		.alias  = "branches",
80 	},
81 	[PERF_COUNT_HW_BRANCH_MISSES] = {
82 		.symbol = "branch-misses",
83 		.alias  = "",
84 	},
85 	[PERF_COUNT_HW_BUS_CYCLES] = {
86 		.symbol = "bus-cycles",
87 		.alias  = "",
88 	},
89 	[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
90 		.symbol = "stalled-cycles-frontend",
91 		.alias  = "idle-cycles-frontend",
92 	},
93 	[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
94 		.symbol = "stalled-cycles-backend",
95 		.alias  = "idle-cycles-backend",
96 	},
97 	[PERF_COUNT_HW_REF_CPU_CYCLES] = {
98 		.symbol = "ref-cycles",
99 		.alias  = "",
100 	},
101 };
102 
103 struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
104 	[PERF_COUNT_SW_CPU_CLOCK] = {
105 		.symbol = "cpu-clock",
106 		.alias  = "",
107 	},
108 	[PERF_COUNT_SW_TASK_CLOCK] = {
109 		.symbol = "task-clock",
110 		.alias  = "",
111 	},
112 	[PERF_COUNT_SW_PAGE_FAULTS] = {
113 		.symbol = "page-faults",
114 		.alias  = "faults",
115 	},
116 	[PERF_COUNT_SW_CONTEXT_SWITCHES] = {
117 		.symbol = "context-switches",
118 		.alias  = "cs",
119 	},
120 	[PERF_COUNT_SW_CPU_MIGRATIONS] = {
121 		.symbol = "cpu-migrations",
122 		.alias  = "migrations",
123 	},
124 	[PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
125 		.symbol = "minor-faults",
126 		.alias  = "",
127 	},
128 	[PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
129 		.symbol = "major-faults",
130 		.alias  = "",
131 	},
132 	[PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
133 		.symbol = "alignment-faults",
134 		.alias  = "",
135 	},
136 	[PERF_COUNT_SW_EMULATION_FAULTS] = {
137 		.symbol = "emulation-faults",
138 		.alias  = "",
139 	},
140 	[PERF_COUNT_SW_DUMMY] = {
141 		.symbol = "dummy",
142 		.alias  = "",
143 	},
144 	[PERF_COUNT_SW_BPF_OUTPUT] = {
145 		.symbol = "bpf-output",
146 		.alias  = "",
147 	},
148 };
149 
150 #define __PERF_EVENT_FIELD(config, name) \
151 	((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
152 
153 #define PERF_EVENT_RAW(config)		__PERF_EVENT_FIELD(config, RAW)
154 #define PERF_EVENT_CONFIG(config)	__PERF_EVENT_FIELD(config, CONFIG)
155 #define PERF_EVENT_TYPE(config)		__PERF_EVENT_FIELD(config, TYPE)
156 #define PERF_EVENT_ID(config)		__PERF_EVENT_FIELD(config, EVENT)
157 
158 #define for_each_subsystem(sys_dir, sys_dirent)			\
159 	while ((sys_dirent = readdir(sys_dir)) != NULL)		\
160 		if (sys_dirent->d_type == DT_DIR &&		\
161 		    (strcmp(sys_dirent->d_name, ".")) &&	\
162 		    (strcmp(sys_dirent->d_name, "..")))
163 
164 static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
165 {
166 	char evt_path[MAXPATHLEN];
167 	int fd;
168 
169 	snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
170 	fd = open(evt_path, O_RDONLY);
171 	if (fd < 0)
172 		return -EINVAL;
173 	close(fd);
174 
175 	return 0;
176 }
177 
178 #define for_each_event(dir_path, evt_dir, evt_dirent)		\
179 	while ((evt_dirent = readdir(evt_dir)) != NULL)		\
180 		if (evt_dirent->d_type == DT_DIR &&		\
181 		    (strcmp(evt_dirent->d_name, ".")) &&	\
182 		    (strcmp(evt_dirent->d_name, "..")) &&	\
183 		    (!tp_event_has_id(dir_path, evt_dirent)))
184 
185 #define MAX_EVENT_LENGTH 512
186 
187 void parse_events__handle_error(struct parse_events_error *err, int idx,
188 				char *str, char *help)
189 {
190 	if (WARN(!str, "WARNING: failed to provide error string\n")) {
191 		free(help);
192 		return;
193 	}
194 	switch (err->num_errors) {
195 	case 0:
196 		err->idx = idx;
197 		err->str = str;
198 		err->help = help;
199 		break;
200 	case 1:
201 		err->first_idx = err->idx;
202 		err->idx = idx;
203 		err->first_str = err->str;
204 		err->str = str;
205 		err->first_help = err->help;
206 		err->help = help;
207 		break;
208 	default:
209 		pr_debug("Multiple errors dropping message: %s (%s)\n",
210 			err->str, err->help);
211 		free(err->str);
212 		err->str = str;
213 		free(err->help);
214 		err->help = help;
215 		break;
216 	}
217 	err->num_errors++;
218 }
219 
220 struct tracepoint_path *tracepoint_id_to_path(u64 config)
221 {
222 	struct tracepoint_path *path = NULL;
223 	DIR *sys_dir, *evt_dir;
224 	struct dirent *sys_dirent, *evt_dirent;
225 	char id_buf[24];
226 	int fd;
227 	u64 id;
228 	char evt_path[MAXPATHLEN];
229 	char *dir_path;
230 
231 	sys_dir = tracing_events__opendir();
232 	if (!sys_dir)
233 		return NULL;
234 
235 	for_each_subsystem(sys_dir, sys_dirent) {
236 		dir_path = get_events_file(sys_dirent->d_name);
237 		if (!dir_path)
238 			continue;
239 		evt_dir = opendir(dir_path);
240 		if (!evt_dir)
241 			goto next;
242 
243 		for_each_event(dir_path, evt_dir, evt_dirent) {
244 
245 			scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
246 				  evt_dirent->d_name);
247 			fd = open(evt_path, O_RDONLY);
248 			if (fd < 0)
249 				continue;
250 			if (read(fd, id_buf, sizeof(id_buf)) < 0) {
251 				close(fd);
252 				continue;
253 			}
254 			close(fd);
255 			id = atoll(id_buf);
256 			if (id == config) {
257 				put_events_file(dir_path);
258 				closedir(evt_dir);
259 				closedir(sys_dir);
260 				path = zalloc(sizeof(*path));
261 				if (!path)
262 					return NULL;
263 				if (asprintf(&path->system, "%.*s", MAX_EVENT_LENGTH, sys_dirent->d_name) < 0) {
264 					free(path);
265 					return NULL;
266 				}
267 				if (asprintf(&path->name, "%.*s", MAX_EVENT_LENGTH, evt_dirent->d_name) < 0) {
268 					zfree(&path->system);
269 					free(path);
270 					return NULL;
271 				}
272 				return path;
273 			}
274 		}
275 		closedir(evt_dir);
276 next:
277 		put_events_file(dir_path);
278 	}
279 
280 	closedir(sys_dir);
281 	return NULL;
282 }
283 
284 struct tracepoint_path *tracepoint_name_to_path(const char *name)
285 {
286 	struct tracepoint_path *path = zalloc(sizeof(*path));
287 	char *str = strchr(name, ':');
288 
289 	if (path == NULL || str == NULL) {
290 		free(path);
291 		return NULL;
292 	}
293 
294 	path->system = strndup(name, str - name);
295 	path->name = strdup(str+1);
296 
297 	if (path->system == NULL || path->name == NULL) {
298 		zfree(&path->system);
299 		zfree(&path->name);
300 		zfree(&path);
301 	}
302 
303 	return path;
304 }
305 
306 const char *event_type(int type)
307 {
308 	switch (type) {
309 	case PERF_TYPE_HARDWARE:
310 		return "hardware";
311 
312 	case PERF_TYPE_SOFTWARE:
313 		return "software";
314 
315 	case PERF_TYPE_TRACEPOINT:
316 		return "tracepoint";
317 
318 	case PERF_TYPE_HW_CACHE:
319 		return "hardware-cache";
320 
321 	default:
322 		break;
323 	}
324 
325 	return "unknown";
326 }
327 
328 static int parse_events__is_name_term(struct parse_events_term *term)
329 {
330 	return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
331 }
332 
333 static char *get_config_name(struct list_head *head_terms)
334 {
335 	struct parse_events_term *term;
336 
337 	if (!head_terms)
338 		return NULL;
339 
340 	list_for_each_entry(term, head_terms, list)
341 		if (parse_events__is_name_term(term))
342 			return term->val.str;
343 
344 	return NULL;
345 }
346 
347 static struct evsel *
348 __add_event(struct list_head *list, int *idx,
349 	    struct perf_event_attr *attr,
350 	    bool init_attr,
351 	    char *name, struct perf_pmu *pmu,
352 	    struct list_head *config_terms, bool auto_merge_stats,
353 	    const char *cpu_list)
354 {
355 	struct evsel *evsel;
356 	struct perf_cpu_map *cpus = pmu ? pmu->cpus :
357 			       cpu_list ? perf_cpu_map__new(cpu_list) : NULL;
358 
359 	if (init_attr)
360 		event_attr_init(attr);
361 
362 	evsel = evsel__new_idx(attr, *idx);
363 	if (!evsel)
364 		return NULL;
365 
366 	(*idx)++;
367 	evsel->core.cpus   = perf_cpu_map__get(cpus);
368 	evsel->core.own_cpus = perf_cpu_map__get(cpus);
369 	evsel->core.system_wide = pmu ? pmu->is_uncore : false;
370 	evsel->auto_merge_stats = auto_merge_stats;
371 
372 	if (name)
373 		evsel->name = strdup(name);
374 
375 	if (config_terms)
376 		list_splice(config_terms, &evsel->config_terms);
377 
378 	if (list)
379 		list_add_tail(&evsel->core.node, list);
380 
381 	return evsel;
382 }
383 
384 struct evsel *parse_events__add_event(int idx, struct perf_event_attr *attr,
385 					char *name, struct perf_pmu *pmu)
386 {
387 	return __add_event(NULL, &idx, attr, false, name, pmu, NULL, false,
388 			   NULL);
389 }
390 
391 static int add_event(struct list_head *list, int *idx,
392 		     struct perf_event_attr *attr, char *name,
393 		     struct list_head *config_terms)
394 {
395 	return __add_event(list, idx, attr, true, name, NULL, config_terms,
396 			   false, NULL) ? 0 : -ENOMEM;
397 }
398 
399 static int add_event_tool(struct list_head *list, int *idx,
400 			  enum perf_tool_event tool_event)
401 {
402 	struct evsel *evsel;
403 	struct perf_event_attr attr = {
404 		.type = PERF_TYPE_SOFTWARE,
405 		.config = PERF_COUNT_SW_DUMMY,
406 	};
407 
408 	evsel = __add_event(list, idx, &attr, true, NULL, NULL, NULL, false,
409 			    "0");
410 	if (!evsel)
411 		return -ENOMEM;
412 	evsel->tool_event = tool_event;
413 	if (tool_event == PERF_TOOL_DURATION_TIME)
414 		evsel->unit = strdup("ns");
415 	return 0;
416 }
417 
418 static int parse_aliases(char *str, const char *names[][EVSEL__MAX_ALIASES], int size)
419 {
420 	int i, j;
421 	int n, longest = -1;
422 
423 	for (i = 0; i < size; i++) {
424 		for (j = 0; j < EVSEL__MAX_ALIASES && names[i][j]; j++) {
425 			n = strlen(names[i][j]);
426 			if (n > longest && !strncasecmp(str, names[i][j], n))
427 				longest = n;
428 		}
429 		if (longest > 0)
430 			return i;
431 	}
432 
433 	return -1;
434 }
435 
436 typedef int config_term_func_t(struct perf_event_attr *attr,
437 			       struct parse_events_term *term,
438 			       struct parse_events_error *err);
439 static int config_term_common(struct perf_event_attr *attr,
440 			      struct parse_events_term *term,
441 			      struct parse_events_error *err);
442 static int config_attr(struct perf_event_attr *attr,
443 		       struct list_head *head,
444 		       struct parse_events_error *err,
445 		       config_term_func_t config_term);
446 
447 int parse_events_add_cache(struct list_head *list, int *idx,
448 			   char *type, char *op_result1, char *op_result2,
449 			   struct parse_events_error *err,
450 			   struct list_head *head_config)
451 {
452 	struct perf_event_attr attr;
453 	LIST_HEAD(config_terms);
454 	char name[MAX_NAME_LEN], *config_name;
455 	int cache_type = -1, cache_op = -1, cache_result = -1;
456 	char *op_result[2] = { op_result1, op_result2 };
457 	int i, n;
458 
459 	/*
460 	 * No fallback - if we cannot get a clear cache type
461 	 * then bail out:
462 	 */
463 	cache_type = parse_aliases(type, evsel__hw_cache, PERF_COUNT_HW_CACHE_MAX);
464 	if (cache_type == -1)
465 		return -EINVAL;
466 
467 	config_name = get_config_name(head_config);
468 	n = snprintf(name, MAX_NAME_LEN, "%s", type);
469 
470 	for (i = 0; (i < 2) && (op_result[i]); i++) {
471 		char *str = op_result[i];
472 
473 		n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
474 
475 		if (cache_op == -1) {
476 			cache_op = parse_aliases(str, evsel__hw_cache_op,
477 						 PERF_COUNT_HW_CACHE_OP_MAX);
478 			if (cache_op >= 0) {
479 				if (!evsel__is_cache_op_valid(cache_type, cache_op))
480 					return -EINVAL;
481 				continue;
482 			}
483 		}
484 
485 		if (cache_result == -1) {
486 			cache_result = parse_aliases(str, evsel__hw_cache_result,
487 						     PERF_COUNT_HW_CACHE_RESULT_MAX);
488 			if (cache_result >= 0)
489 				continue;
490 		}
491 	}
492 
493 	/*
494 	 * Fall back to reads:
495 	 */
496 	if (cache_op == -1)
497 		cache_op = PERF_COUNT_HW_CACHE_OP_READ;
498 
499 	/*
500 	 * Fall back to accesses:
501 	 */
502 	if (cache_result == -1)
503 		cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
504 
505 	memset(&attr, 0, sizeof(attr));
506 	attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
507 	attr.type = PERF_TYPE_HW_CACHE;
508 
509 	if (head_config) {
510 		if (config_attr(&attr, head_config, err,
511 				config_term_common))
512 			return -EINVAL;
513 
514 		if (get_config_terms(head_config, &config_terms))
515 			return -ENOMEM;
516 	}
517 	return add_event(list, idx, &attr, config_name ? : name, &config_terms);
518 }
519 
520 static void tracepoint_error(struct parse_events_error *e, int err,
521 			     const char *sys, const char *name)
522 {
523 	const char *str;
524 	char help[BUFSIZ];
525 
526 	if (!e)
527 		return;
528 
529 	/*
530 	 * We get error directly from syscall errno ( > 0),
531 	 * or from encoded pointer's error ( < 0).
532 	 */
533 	err = abs(err);
534 
535 	switch (err) {
536 	case EACCES:
537 		str = "can't access trace events";
538 		break;
539 	case ENOENT:
540 		str = "unknown tracepoint";
541 		break;
542 	default:
543 		str = "failed to add tracepoint";
544 		break;
545 	}
546 
547 	tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
548 	parse_events__handle_error(e, 0, strdup(str), strdup(help));
549 }
550 
551 static int add_tracepoint(struct list_head *list, int *idx,
552 			  const char *sys_name, const char *evt_name,
553 			  struct parse_events_error *err,
554 			  struct list_head *head_config)
555 {
556 	struct evsel *evsel = evsel__newtp_idx(sys_name, evt_name, (*idx)++);
557 
558 	if (IS_ERR(evsel)) {
559 		tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
560 		return PTR_ERR(evsel);
561 	}
562 
563 	if (head_config) {
564 		LIST_HEAD(config_terms);
565 
566 		if (get_config_terms(head_config, &config_terms))
567 			return -ENOMEM;
568 		list_splice(&config_terms, &evsel->config_terms);
569 	}
570 
571 	list_add_tail(&evsel->core.node, list);
572 	return 0;
573 }
574 
575 static int add_tracepoint_multi_event(struct list_head *list, int *idx,
576 				      const char *sys_name, const char *evt_name,
577 				      struct parse_events_error *err,
578 				      struct list_head *head_config)
579 {
580 	char *evt_path;
581 	struct dirent *evt_ent;
582 	DIR *evt_dir;
583 	int ret = 0, found = 0;
584 
585 	evt_path = get_events_file(sys_name);
586 	if (!evt_path) {
587 		tracepoint_error(err, errno, sys_name, evt_name);
588 		return -1;
589 	}
590 	evt_dir = opendir(evt_path);
591 	if (!evt_dir) {
592 		put_events_file(evt_path);
593 		tracepoint_error(err, errno, sys_name, evt_name);
594 		return -1;
595 	}
596 
597 	while (!ret && (evt_ent = readdir(evt_dir))) {
598 		if (!strcmp(evt_ent->d_name, ".")
599 		    || !strcmp(evt_ent->d_name, "..")
600 		    || !strcmp(evt_ent->d_name, "enable")
601 		    || !strcmp(evt_ent->d_name, "filter"))
602 			continue;
603 
604 		if (!strglobmatch(evt_ent->d_name, evt_name))
605 			continue;
606 
607 		found++;
608 
609 		ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
610 				     err, head_config);
611 	}
612 
613 	if (!found) {
614 		tracepoint_error(err, ENOENT, sys_name, evt_name);
615 		ret = -1;
616 	}
617 
618 	put_events_file(evt_path);
619 	closedir(evt_dir);
620 	return ret;
621 }
622 
623 static int add_tracepoint_event(struct list_head *list, int *idx,
624 				const char *sys_name, const char *evt_name,
625 				struct parse_events_error *err,
626 				struct list_head *head_config)
627 {
628 	return strpbrk(evt_name, "*?") ?
629 	       add_tracepoint_multi_event(list, idx, sys_name, evt_name,
630 					  err, head_config) :
631 	       add_tracepoint(list, idx, sys_name, evt_name,
632 			      err, head_config);
633 }
634 
635 static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
636 				    const char *sys_name, const char *evt_name,
637 				    struct parse_events_error *err,
638 				    struct list_head *head_config)
639 {
640 	struct dirent *events_ent;
641 	DIR *events_dir;
642 	int ret = 0;
643 
644 	events_dir = tracing_events__opendir();
645 	if (!events_dir) {
646 		tracepoint_error(err, errno, sys_name, evt_name);
647 		return -1;
648 	}
649 
650 	while (!ret && (events_ent = readdir(events_dir))) {
651 		if (!strcmp(events_ent->d_name, ".")
652 		    || !strcmp(events_ent->d_name, "..")
653 		    || !strcmp(events_ent->d_name, "enable")
654 		    || !strcmp(events_ent->d_name, "header_event")
655 		    || !strcmp(events_ent->d_name, "header_page"))
656 			continue;
657 
658 		if (!strglobmatch(events_ent->d_name, sys_name))
659 			continue;
660 
661 		ret = add_tracepoint_event(list, idx, events_ent->d_name,
662 					   evt_name, err, head_config);
663 	}
664 
665 	closedir(events_dir);
666 	return ret;
667 }
668 
669 struct __add_bpf_event_param {
670 	struct parse_events_state *parse_state;
671 	struct list_head *list;
672 	struct list_head *head_config;
673 };
674 
675 static int add_bpf_event(const char *group, const char *event, int fd, struct bpf_object *obj,
676 			 void *_param)
677 {
678 	LIST_HEAD(new_evsels);
679 	struct __add_bpf_event_param *param = _param;
680 	struct parse_events_state *parse_state = param->parse_state;
681 	struct list_head *list = param->list;
682 	struct evsel *pos;
683 	int err;
684 	/*
685 	 * Check if we should add the event, i.e. if it is a TP but starts with a '!',
686 	 * then don't add the tracepoint, this will be used for something else, like
687 	 * adding to a BPF_MAP_TYPE_PROG_ARRAY.
688 	 *
689 	 * See tools/perf/examples/bpf/augmented_raw_syscalls.c
690 	 */
691 	if (group[0] == '!')
692 		return 0;
693 
694 	pr_debug("add bpf event %s:%s and attach bpf program %d\n",
695 		 group, event, fd);
696 
697 	err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
698 					  event, parse_state->error,
699 					  param->head_config);
700 	if (err) {
701 		struct evsel *evsel, *tmp;
702 
703 		pr_debug("Failed to add BPF event %s:%s\n",
704 			 group, event);
705 		list_for_each_entry_safe(evsel, tmp, &new_evsels, core.node) {
706 			list_del_init(&evsel->core.node);
707 			evsel__delete(evsel);
708 		}
709 		return err;
710 	}
711 	pr_debug("adding %s:%s\n", group, event);
712 
713 	list_for_each_entry(pos, &new_evsels, core.node) {
714 		pr_debug("adding %s:%s to %p\n",
715 			 group, event, pos);
716 		pos->bpf_fd = fd;
717 		pos->bpf_obj = obj;
718 	}
719 	list_splice(&new_evsels, list);
720 	return 0;
721 }
722 
723 int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
724 			      struct list_head *list,
725 			      struct bpf_object *obj,
726 			      struct list_head *head_config)
727 {
728 	int err;
729 	char errbuf[BUFSIZ];
730 	struct __add_bpf_event_param param = {parse_state, list, head_config};
731 	static bool registered_unprobe_atexit = false;
732 
733 	if (IS_ERR(obj) || !obj) {
734 		snprintf(errbuf, sizeof(errbuf),
735 			 "Internal error: load bpf obj with NULL");
736 		err = -EINVAL;
737 		goto errout;
738 	}
739 
740 	/*
741 	 * Register atexit handler before calling bpf__probe() so
742 	 * bpf__probe() don't need to unprobe probe points its already
743 	 * created when failure.
744 	 */
745 	if (!registered_unprobe_atexit) {
746 		atexit(bpf__clear);
747 		registered_unprobe_atexit = true;
748 	}
749 
750 	err = bpf__probe(obj);
751 	if (err) {
752 		bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
753 		goto errout;
754 	}
755 
756 	err = bpf__load(obj);
757 	if (err) {
758 		bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
759 		goto errout;
760 	}
761 
762 	err = bpf__foreach_event(obj, add_bpf_event, &param);
763 	if (err) {
764 		snprintf(errbuf, sizeof(errbuf),
765 			 "Attach events in BPF object failed");
766 		goto errout;
767 	}
768 
769 	return 0;
770 errout:
771 	parse_events__handle_error(parse_state->error, 0,
772 				strdup(errbuf), strdup("(add -v to see detail)"));
773 	return err;
774 }
775 
776 static int
777 parse_events_config_bpf(struct parse_events_state *parse_state,
778 			struct bpf_object *obj,
779 			struct list_head *head_config)
780 {
781 	struct parse_events_term *term;
782 	int error_pos;
783 
784 	if (!head_config || list_empty(head_config))
785 		return 0;
786 
787 	list_for_each_entry(term, head_config, list) {
788 		int err;
789 
790 		if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
791 			parse_events__handle_error(parse_state->error, term->err_term,
792 						strdup("Invalid config term for BPF object"),
793 						NULL);
794 			return -EINVAL;
795 		}
796 
797 		err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
798 		if (err) {
799 			char errbuf[BUFSIZ];
800 			int idx;
801 
802 			bpf__strerror_config_obj(obj, term, parse_state->evlist,
803 						 &error_pos, err, errbuf,
804 						 sizeof(errbuf));
805 
806 			if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
807 				idx = term->err_val;
808 			else
809 				idx = term->err_term + error_pos;
810 
811 			parse_events__handle_error(parse_state->error, idx,
812 						strdup(errbuf),
813 						strdup(
814 "Hint:\tValid config terms:\n"
815 "     \tmap:[<arraymap>].value<indices>=[value]\n"
816 "     \tmap:[<eventmap>].event<indices>=[event]\n"
817 "\n"
818 "     \twhere <indices> is something like [0,3...5] or [all]\n"
819 "     \t(add -v to see detail)"));
820 			return err;
821 		}
822 	}
823 	return 0;
824 }
825 
826 /*
827  * Split config terms:
828  * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
829  *  'call-graph=fp' is 'evt config', should be applied to each
830  *  events in bpf.c.
831  * 'map:array.value[0]=1' is 'obj config', should be processed
832  * with parse_events_config_bpf.
833  *
834  * Move object config terms from the first list to obj_head_config.
835  */
836 static void
837 split_bpf_config_terms(struct list_head *evt_head_config,
838 		       struct list_head *obj_head_config)
839 {
840 	struct parse_events_term *term, *temp;
841 
842 	/*
843 	 * Currectly, all possible user config term
844 	 * belong to bpf object. parse_events__is_hardcoded_term()
845 	 * happends to be a good flag.
846 	 *
847 	 * See parse_events_config_bpf() and
848 	 * config_term_tracepoint().
849 	 */
850 	list_for_each_entry_safe(term, temp, evt_head_config, list)
851 		if (!parse_events__is_hardcoded_term(term))
852 			list_move_tail(&term->list, obj_head_config);
853 }
854 
855 int parse_events_load_bpf(struct parse_events_state *parse_state,
856 			  struct list_head *list,
857 			  char *bpf_file_name,
858 			  bool source,
859 			  struct list_head *head_config)
860 {
861 	int err;
862 	struct bpf_object *obj;
863 	LIST_HEAD(obj_head_config);
864 
865 	if (head_config)
866 		split_bpf_config_terms(head_config, &obj_head_config);
867 
868 	obj = bpf__prepare_load(bpf_file_name, source);
869 	if (IS_ERR(obj)) {
870 		char errbuf[BUFSIZ];
871 
872 		err = PTR_ERR(obj);
873 
874 		if (err == -ENOTSUP)
875 			snprintf(errbuf, sizeof(errbuf),
876 				 "BPF support is not compiled");
877 		else
878 			bpf__strerror_prepare_load(bpf_file_name,
879 						   source,
880 						   -err, errbuf,
881 						   sizeof(errbuf));
882 
883 		parse_events__handle_error(parse_state->error, 0,
884 					strdup(errbuf), strdup("(add -v to see detail)"));
885 		return err;
886 	}
887 
888 	err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
889 	if (err)
890 		return err;
891 	err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
892 
893 	/*
894 	 * Caller doesn't know anything about obj_head_config,
895 	 * so combine them together again before returnning.
896 	 */
897 	if (head_config)
898 		list_splice_tail(&obj_head_config, head_config);
899 	return err;
900 }
901 
902 static int
903 parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
904 {
905 	int i;
906 
907 	for (i = 0; i < 3; i++) {
908 		if (!type || !type[i])
909 			break;
910 
911 #define CHECK_SET_TYPE(bit)		\
912 do {					\
913 	if (attr->bp_type & bit)	\
914 		return -EINVAL;		\
915 	else				\
916 		attr->bp_type |= bit;	\
917 } while (0)
918 
919 		switch (type[i]) {
920 		case 'r':
921 			CHECK_SET_TYPE(HW_BREAKPOINT_R);
922 			break;
923 		case 'w':
924 			CHECK_SET_TYPE(HW_BREAKPOINT_W);
925 			break;
926 		case 'x':
927 			CHECK_SET_TYPE(HW_BREAKPOINT_X);
928 			break;
929 		default:
930 			return -EINVAL;
931 		}
932 	}
933 
934 #undef CHECK_SET_TYPE
935 
936 	if (!attr->bp_type) /* Default */
937 		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
938 
939 	return 0;
940 }
941 
942 int parse_events_add_breakpoint(struct list_head *list, int *idx,
943 				void *ptr, char *type, u64 len)
944 {
945 	struct perf_event_attr attr;
946 
947 	memset(&attr, 0, sizeof(attr));
948 	attr.bp_addr = (unsigned long) ptr;
949 
950 	if (parse_breakpoint_type(type, &attr))
951 		return -EINVAL;
952 
953 	/* Provide some defaults if len is not specified */
954 	if (!len) {
955 		if (attr.bp_type == HW_BREAKPOINT_X)
956 			len = sizeof(long);
957 		else
958 			len = HW_BREAKPOINT_LEN_4;
959 	}
960 
961 	attr.bp_len = len;
962 
963 	attr.type = PERF_TYPE_BREAKPOINT;
964 	attr.sample_period = 1;
965 
966 	return add_event(list, idx, &attr, NULL, NULL);
967 }
968 
969 static int check_type_val(struct parse_events_term *term,
970 			  struct parse_events_error *err,
971 			  int type)
972 {
973 	if (type == term->type_val)
974 		return 0;
975 
976 	if (err) {
977 		parse_events__handle_error(err, term->err_val,
978 					type == PARSE_EVENTS__TERM_TYPE_NUM
979 					? strdup("expected numeric value")
980 					: strdup("expected string value"),
981 					NULL);
982 	}
983 	return -EINVAL;
984 }
985 
986 /*
987  * Update according to parse-events.l
988  */
989 static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
990 	[PARSE_EVENTS__TERM_TYPE_USER]			= "<sysfs term>",
991 	[PARSE_EVENTS__TERM_TYPE_CONFIG]		= "config",
992 	[PARSE_EVENTS__TERM_TYPE_CONFIG1]		= "config1",
993 	[PARSE_EVENTS__TERM_TYPE_CONFIG2]		= "config2",
994 	[PARSE_EVENTS__TERM_TYPE_NAME]			= "name",
995 	[PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]		= "period",
996 	[PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]		= "freq",
997 	[PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]	= "branch_type",
998 	[PARSE_EVENTS__TERM_TYPE_TIME]			= "time",
999 	[PARSE_EVENTS__TERM_TYPE_CALLGRAPH]		= "call-graph",
1000 	[PARSE_EVENTS__TERM_TYPE_STACKSIZE]		= "stack-size",
1001 	[PARSE_EVENTS__TERM_TYPE_NOINHERIT]		= "no-inherit",
1002 	[PARSE_EVENTS__TERM_TYPE_INHERIT]		= "inherit",
1003 	[PARSE_EVENTS__TERM_TYPE_MAX_STACK]		= "max-stack",
1004 	[PARSE_EVENTS__TERM_TYPE_MAX_EVENTS]		= "nr",
1005 	[PARSE_EVENTS__TERM_TYPE_OVERWRITE]		= "overwrite",
1006 	[PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]		= "no-overwrite",
1007 	[PARSE_EVENTS__TERM_TYPE_DRV_CFG]		= "driver-config",
1008 	[PARSE_EVENTS__TERM_TYPE_PERCORE]		= "percore",
1009 	[PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT]		= "aux-output",
1010 	[PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE]	= "aux-sample-size",
1011 };
1012 
1013 static bool config_term_shrinked;
1014 
1015 static bool
1016 config_term_avail(int term_type, struct parse_events_error *err)
1017 {
1018 	char *err_str;
1019 
1020 	if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
1021 		parse_events__handle_error(err, -1,
1022 					strdup("Invalid term_type"), NULL);
1023 		return false;
1024 	}
1025 	if (!config_term_shrinked)
1026 		return true;
1027 
1028 	switch (term_type) {
1029 	case PARSE_EVENTS__TERM_TYPE_CONFIG:
1030 	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1031 	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1032 	case PARSE_EVENTS__TERM_TYPE_NAME:
1033 	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1034 	case PARSE_EVENTS__TERM_TYPE_PERCORE:
1035 		return true;
1036 	default:
1037 		if (!err)
1038 			return false;
1039 
1040 		/* term_type is validated so indexing is safe */
1041 		if (asprintf(&err_str, "'%s' is not usable in 'perf stat'",
1042 				config_term_names[term_type]) >= 0)
1043 			parse_events__handle_error(err, -1, err_str, NULL);
1044 		return false;
1045 	}
1046 }
1047 
1048 void parse_events__shrink_config_terms(void)
1049 {
1050 	config_term_shrinked = true;
1051 }
1052 
1053 static int config_term_common(struct perf_event_attr *attr,
1054 			      struct parse_events_term *term,
1055 			      struct parse_events_error *err)
1056 {
1057 #define CHECK_TYPE_VAL(type)						   \
1058 do {									   \
1059 	if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
1060 		return -EINVAL;						   \
1061 } while (0)
1062 
1063 	switch (term->type_term) {
1064 	case PARSE_EVENTS__TERM_TYPE_CONFIG:
1065 		CHECK_TYPE_VAL(NUM);
1066 		attr->config = term->val.num;
1067 		break;
1068 	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
1069 		CHECK_TYPE_VAL(NUM);
1070 		attr->config1 = term->val.num;
1071 		break;
1072 	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
1073 		CHECK_TYPE_VAL(NUM);
1074 		attr->config2 = term->val.num;
1075 		break;
1076 	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1077 		CHECK_TYPE_VAL(NUM);
1078 		break;
1079 	case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1080 		CHECK_TYPE_VAL(NUM);
1081 		break;
1082 	case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1083 		CHECK_TYPE_VAL(STR);
1084 		if (strcmp(term->val.str, "no") &&
1085 		    parse_branch_str(term->val.str,
1086 				    &attr->branch_sample_type)) {
1087 			parse_events__handle_error(err, term->err_val,
1088 					strdup("invalid branch sample type"),
1089 					NULL);
1090 			return -EINVAL;
1091 		}
1092 		break;
1093 	case PARSE_EVENTS__TERM_TYPE_TIME:
1094 		CHECK_TYPE_VAL(NUM);
1095 		if (term->val.num > 1) {
1096 			parse_events__handle_error(err, term->err_val,
1097 						strdup("expected 0 or 1"),
1098 						NULL);
1099 			return -EINVAL;
1100 		}
1101 		break;
1102 	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1103 		CHECK_TYPE_VAL(STR);
1104 		break;
1105 	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1106 		CHECK_TYPE_VAL(NUM);
1107 		break;
1108 	case PARSE_EVENTS__TERM_TYPE_INHERIT:
1109 		CHECK_TYPE_VAL(NUM);
1110 		break;
1111 	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1112 		CHECK_TYPE_VAL(NUM);
1113 		break;
1114 	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1115 		CHECK_TYPE_VAL(NUM);
1116 		break;
1117 	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1118 		CHECK_TYPE_VAL(NUM);
1119 		break;
1120 	case PARSE_EVENTS__TERM_TYPE_NAME:
1121 		CHECK_TYPE_VAL(STR);
1122 		break;
1123 	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1124 		CHECK_TYPE_VAL(NUM);
1125 		break;
1126 	case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1127 		CHECK_TYPE_VAL(NUM);
1128 		break;
1129 	case PARSE_EVENTS__TERM_TYPE_PERCORE:
1130 		CHECK_TYPE_VAL(NUM);
1131 		if ((unsigned int)term->val.num > 1) {
1132 			parse_events__handle_error(err, term->err_val,
1133 						strdup("expected 0 or 1"),
1134 						NULL);
1135 			return -EINVAL;
1136 		}
1137 		break;
1138 	case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1139 		CHECK_TYPE_VAL(NUM);
1140 		break;
1141 	case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1142 		CHECK_TYPE_VAL(NUM);
1143 		if (term->val.num > UINT_MAX) {
1144 			parse_events__handle_error(err, term->err_val,
1145 						strdup("too big"),
1146 						NULL);
1147 			return -EINVAL;
1148 		}
1149 		break;
1150 	default:
1151 		parse_events__handle_error(err, term->err_term,
1152 				strdup("unknown term"),
1153 				parse_events_formats_error_string(NULL));
1154 		return -EINVAL;
1155 	}
1156 
1157 	/*
1158 	 * Check term availbility after basic checking so
1159 	 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
1160 	 *
1161 	 * If check availbility at the entry of this function,
1162 	 * user will see "'<sysfs term>' is not usable in 'perf stat'"
1163 	 * if an invalid config term is provided for legacy events
1164 	 * (for example, instructions/badterm/...), which is confusing.
1165 	 */
1166 	if (!config_term_avail(term->type_term, err))
1167 		return -EINVAL;
1168 	return 0;
1169 #undef CHECK_TYPE_VAL
1170 }
1171 
1172 static int config_term_pmu(struct perf_event_attr *attr,
1173 			   struct parse_events_term *term,
1174 			   struct parse_events_error *err)
1175 {
1176 	if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
1177 	    term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1178 		/*
1179 		 * Always succeed for sysfs terms, as we dont know
1180 		 * at this point what type they need to have.
1181 		 */
1182 		return 0;
1183 	else
1184 		return config_term_common(attr, term, err);
1185 }
1186 
1187 static int config_term_tracepoint(struct perf_event_attr *attr,
1188 				  struct parse_events_term *term,
1189 				  struct parse_events_error *err)
1190 {
1191 	switch (term->type_term) {
1192 	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1193 	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1194 	case PARSE_EVENTS__TERM_TYPE_INHERIT:
1195 	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1196 	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1197 	case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1198 	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1199 	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1200 	case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1201 	case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1202 		return config_term_common(attr, term, err);
1203 	default:
1204 		if (err) {
1205 			parse_events__handle_error(err, term->err_term,
1206 				strdup("unknown term"),
1207 				strdup("valid terms: call-graph,stack-size\n"));
1208 		}
1209 		return -EINVAL;
1210 	}
1211 
1212 	return 0;
1213 }
1214 
1215 static int config_attr(struct perf_event_attr *attr,
1216 		       struct list_head *head,
1217 		       struct parse_events_error *err,
1218 		       config_term_func_t config_term)
1219 {
1220 	struct parse_events_term *term;
1221 
1222 	list_for_each_entry(term, head, list)
1223 		if (config_term(attr, term, err))
1224 			return -EINVAL;
1225 
1226 	return 0;
1227 }
1228 
1229 static int get_config_terms(struct list_head *head_config,
1230 			    struct list_head *head_terms __maybe_unused)
1231 {
1232 #define ADD_CONFIG_TERM(__type, __weak)				\
1233 	struct evsel_config_term *__t;			\
1234 								\
1235 	__t = zalloc(sizeof(*__t));				\
1236 	if (!__t)						\
1237 		return -ENOMEM;					\
1238 								\
1239 	INIT_LIST_HEAD(&__t->list);				\
1240 	__t->type       = EVSEL__CONFIG_TERM_ ## __type;	\
1241 	__t->weak	= __weak;				\
1242 	list_add_tail(&__t->list, head_terms)
1243 
1244 #define ADD_CONFIG_TERM_VAL(__type, __name, __val, __weak)	\
1245 do {								\
1246 	ADD_CONFIG_TERM(__type, __weak);			\
1247 	__t->val.__name = __val;				\
1248 } while (0)
1249 
1250 #define ADD_CONFIG_TERM_STR(__type, __val, __weak)		\
1251 do {								\
1252 	ADD_CONFIG_TERM(__type, __weak);			\
1253 	__t->val.str = strdup(__val);				\
1254 	if (!__t->val.str) {					\
1255 		zfree(&__t);					\
1256 		return -ENOMEM;					\
1257 	}							\
1258 	__t->free_str = true;					\
1259 } while (0)
1260 
1261 	struct parse_events_term *term;
1262 
1263 	list_for_each_entry(term, head_config, list) {
1264 		switch (term->type_term) {
1265 		case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
1266 			ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num, term->weak);
1267 			break;
1268 		case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
1269 			ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num, term->weak);
1270 			break;
1271 		case PARSE_EVENTS__TERM_TYPE_TIME:
1272 			ADD_CONFIG_TERM_VAL(TIME, time, term->val.num, term->weak);
1273 			break;
1274 		case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
1275 			ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str, term->weak);
1276 			break;
1277 		case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
1278 			ADD_CONFIG_TERM_STR(BRANCH, term->val.str, term->weak);
1279 			break;
1280 		case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1281 			ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
1282 					    term->val.num, term->weak);
1283 			break;
1284 		case PARSE_EVENTS__TERM_TYPE_INHERIT:
1285 			ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1286 					    term->val.num ? 1 : 0, term->weak);
1287 			break;
1288 		case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1289 			ADD_CONFIG_TERM_VAL(INHERIT, inherit,
1290 					    term->val.num ? 0 : 1, term->weak);
1291 			break;
1292 		case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
1293 			ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
1294 					    term->val.num, term->weak);
1295 			break;
1296 		case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
1297 			ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
1298 					    term->val.num, term->weak);
1299 			break;
1300 		case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
1301 			ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1302 					    term->val.num ? 1 : 0, term->weak);
1303 			break;
1304 		case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1305 			ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
1306 					    term->val.num ? 0 : 1, term->weak);
1307 			break;
1308 		case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
1309 			ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str, term->weak);
1310 			break;
1311 		case PARSE_EVENTS__TERM_TYPE_PERCORE:
1312 			ADD_CONFIG_TERM_VAL(PERCORE, percore,
1313 					    term->val.num ? true : false, term->weak);
1314 			break;
1315 		case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
1316 			ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
1317 					    term->val.num ? 1 : 0, term->weak);
1318 			break;
1319 		case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
1320 			ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
1321 					    term->val.num, term->weak);
1322 			break;
1323 		default:
1324 			break;
1325 		}
1326 	}
1327 	return 0;
1328 }
1329 
1330 /*
1331  * Add EVSEL__CONFIG_TERM_CFG_CHG where cfg_chg will have a bit set for
1332  * each bit of attr->config that the user has changed.
1333  */
1334 static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
1335 			   struct list_head *head_terms)
1336 {
1337 	struct parse_events_term *term;
1338 	u64 bits = 0;
1339 	int type;
1340 
1341 	list_for_each_entry(term, head_config, list) {
1342 		switch (term->type_term) {
1343 		case PARSE_EVENTS__TERM_TYPE_USER:
1344 			type = perf_pmu__format_type(&pmu->format, term->config);
1345 			if (type != PERF_PMU_FORMAT_VALUE_CONFIG)
1346 				continue;
1347 			bits |= perf_pmu__format_bits(&pmu->format, term->config);
1348 			break;
1349 		case PARSE_EVENTS__TERM_TYPE_CONFIG:
1350 			bits = ~(u64)0;
1351 			break;
1352 		default:
1353 			break;
1354 		}
1355 	}
1356 
1357 	if (bits)
1358 		ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits, false);
1359 
1360 #undef ADD_CONFIG_TERM
1361 	return 0;
1362 }
1363 
1364 int parse_events_add_tracepoint(struct list_head *list, int *idx,
1365 				const char *sys, const char *event,
1366 				struct parse_events_error *err,
1367 				struct list_head *head_config)
1368 {
1369 	if (head_config) {
1370 		struct perf_event_attr attr;
1371 
1372 		if (config_attr(&attr, head_config, err,
1373 				config_term_tracepoint))
1374 			return -EINVAL;
1375 	}
1376 
1377 	if (strpbrk(sys, "*?"))
1378 		return add_tracepoint_multi_sys(list, idx, sys, event,
1379 						err, head_config);
1380 	else
1381 		return add_tracepoint_event(list, idx, sys, event,
1382 					    err, head_config);
1383 }
1384 
1385 int parse_events_add_numeric(struct parse_events_state *parse_state,
1386 			     struct list_head *list,
1387 			     u32 type, u64 config,
1388 			     struct list_head *head_config)
1389 {
1390 	struct perf_event_attr attr;
1391 	LIST_HEAD(config_terms);
1392 
1393 	memset(&attr, 0, sizeof(attr));
1394 	attr.type = type;
1395 	attr.config = config;
1396 
1397 	if (head_config) {
1398 		if (config_attr(&attr, head_config, parse_state->error,
1399 				config_term_common))
1400 			return -EINVAL;
1401 
1402 		if (get_config_terms(head_config, &config_terms))
1403 			return -ENOMEM;
1404 	}
1405 
1406 	return add_event(list, &parse_state->idx, &attr,
1407 			 get_config_name(head_config), &config_terms);
1408 }
1409 
1410 int parse_events_add_tool(struct parse_events_state *parse_state,
1411 			  struct list_head *list,
1412 			  enum perf_tool_event tool_event)
1413 {
1414 	return add_event_tool(list, &parse_state->idx, tool_event);
1415 }
1416 
1417 static bool config_term_percore(struct list_head *config_terms)
1418 {
1419 	struct evsel_config_term *term;
1420 
1421 	list_for_each_entry(term, config_terms, list) {
1422 		if (term->type == EVSEL__CONFIG_TERM_PERCORE)
1423 			return term->val.percore;
1424 	}
1425 
1426 	return false;
1427 }
1428 
1429 int parse_events_add_pmu(struct parse_events_state *parse_state,
1430 			 struct list_head *list, char *name,
1431 			 struct list_head *head_config,
1432 			 bool auto_merge_stats,
1433 			 bool use_alias)
1434 {
1435 	struct perf_event_attr attr;
1436 	struct perf_pmu_info info;
1437 	struct perf_pmu *pmu;
1438 	struct evsel *evsel;
1439 	struct parse_events_error *err = parse_state->error;
1440 	bool use_uncore_alias;
1441 	LIST_HEAD(config_terms);
1442 
1443 	if (verbose > 1) {
1444 		fprintf(stderr, "Attempting to add event pmu '%s' with '",
1445 			name);
1446 		if (head_config) {
1447 			struct parse_events_term *term;
1448 
1449 			list_for_each_entry(term, head_config, list) {
1450 				fprintf(stderr, "%s,", term->config);
1451 			}
1452 		}
1453 		fprintf(stderr, "' that may result in non-fatal errors\n");
1454 	}
1455 
1456 	pmu = parse_state->fake_pmu ?: perf_pmu__find(name);
1457 	if (!pmu) {
1458 		char *err_str;
1459 
1460 		if (asprintf(&err_str,
1461 				"Cannot find PMU `%s'. Missing kernel support?",
1462 				name) >= 0)
1463 			parse_events__handle_error(err, 0, err_str, NULL);
1464 		return -EINVAL;
1465 	}
1466 
1467 	if (pmu->default_config) {
1468 		memcpy(&attr, pmu->default_config,
1469 		       sizeof(struct perf_event_attr));
1470 	} else {
1471 		memset(&attr, 0, sizeof(attr));
1472 	}
1473 
1474 	use_uncore_alias = (pmu->is_uncore && use_alias);
1475 
1476 	if (!head_config) {
1477 		attr.type = pmu->type;
1478 		evsel = __add_event(list, &parse_state->idx, &attr, true, NULL,
1479 				    pmu, NULL, auto_merge_stats, NULL);
1480 		if (evsel) {
1481 			evsel->pmu_name = name ? strdup(name) : NULL;
1482 			evsel->use_uncore_alias = use_uncore_alias;
1483 			return 0;
1484 		} else {
1485 			return -ENOMEM;
1486 		}
1487 	}
1488 
1489 	if (!parse_state->fake_pmu && perf_pmu__check_alias(pmu, head_config, &info))
1490 		return -EINVAL;
1491 
1492 	if (verbose > 1) {
1493 		fprintf(stderr, "After aliases, add event pmu '%s' with '",
1494 			name);
1495 		if (head_config) {
1496 			struct parse_events_term *term;
1497 
1498 			list_for_each_entry(term, head_config, list) {
1499 				fprintf(stderr, "%s,", term->config);
1500 			}
1501 		}
1502 		fprintf(stderr, "' that may result in non-fatal errors\n");
1503 	}
1504 
1505 	/*
1506 	 * Configure hardcoded terms first, no need to check
1507 	 * return value when called with fail == 0 ;)
1508 	 */
1509 	if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1510 		return -EINVAL;
1511 
1512 	if (get_config_terms(head_config, &config_terms))
1513 		return -ENOMEM;
1514 
1515 	/*
1516 	 * When using default config, record which bits of attr->config were
1517 	 * changed by the user.
1518 	 */
1519 	if (pmu->default_config && get_config_chgs(pmu, head_config, &config_terms))
1520 		return -ENOMEM;
1521 
1522 	if (!parse_state->fake_pmu && perf_pmu__config(pmu, &attr, head_config, parse_state->error)) {
1523 		struct evsel_config_term *pos, *tmp;
1524 
1525 		list_for_each_entry_safe(pos, tmp, &config_terms, list) {
1526 			list_del_init(&pos->list);
1527 			if (pos->free_str)
1528 				zfree(&pos->val.str);
1529 			free(pos);
1530 		}
1531 		return -EINVAL;
1532 	}
1533 
1534 	evsel = __add_event(list, &parse_state->idx, &attr, true,
1535 			    get_config_name(head_config), pmu,
1536 			    &config_terms, auto_merge_stats, NULL);
1537 	if (!evsel)
1538 		return -ENOMEM;
1539 
1540 	evsel->pmu_name = name ? strdup(name) : NULL;
1541 	evsel->use_uncore_alias = use_uncore_alias;
1542 	evsel->percore = config_term_percore(&evsel->config_terms);
1543 
1544 	if (parse_state->fake_pmu)
1545 		return 0;
1546 
1547 	evsel->unit = info.unit;
1548 	evsel->scale = info.scale;
1549 	evsel->per_pkg = info.per_pkg;
1550 	evsel->snapshot = info.snapshot;
1551 	evsel->metric_expr = info.metric_expr;
1552 	evsel->metric_name = info.metric_name;
1553 	return 0;
1554 }
1555 
1556 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1557 			       char *str, struct list_head **listp)
1558 {
1559 	struct parse_events_term *term;
1560 	struct list_head *list;
1561 	struct perf_pmu *pmu = NULL;
1562 	int ok = 0;
1563 
1564 	*listp = NULL;
1565 	/* Add it for all PMUs that support the alias */
1566 	list = malloc(sizeof(struct list_head));
1567 	if (!list)
1568 		return -1;
1569 	INIT_LIST_HEAD(list);
1570 	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1571 		struct perf_pmu_alias *alias;
1572 
1573 		list_for_each_entry(alias, &pmu->aliases, list) {
1574 			if (!strcasecmp(alias->name, str)) {
1575 				struct list_head *head;
1576 				char *config;
1577 
1578 				head = malloc(sizeof(struct list_head));
1579 				if (!head)
1580 					return -1;
1581 				INIT_LIST_HEAD(head);
1582 				config = strdup(str);
1583 				if (!config)
1584 					return -1;
1585 				if (parse_events_term__num(&term,
1586 						   PARSE_EVENTS__TERM_TYPE_USER,
1587 						   config, 1, false, &config,
1588 						   NULL) < 0) {
1589 					free(list);
1590 					free(config);
1591 					return -1;
1592 				}
1593 				list_add_tail(&term->list, head);
1594 
1595 				if (!parse_events_add_pmu(parse_state, list,
1596 							  pmu->name, head,
1597 							  true, true)) {
1598 					pr_debug("%s -> %s/%s/\n", str,
1599 						 pmu->name, alias->str);
1600 					ok++;
1601 				}
1602 
1603 				parse_events_terms__delete(head);
1604 			}
1605 		}
1606 	}
1607 	if (!ok) {
1608 		free(list);
1609 		return -1;
1610 	}
1611 	*listp = list;
1612 	return 0;
1613 }
1614 
1615 int parse_events__modifier_group(struct list_head *list,
1616 				 char *event_mod)
1617 {
1618 	return parse_events__modifier_event(list, event_mod, true);
1619 }
1620 
1621 /*
1622  * Check if the two uncore PMUs are from the same uncore block
1623  * The format of the uncore PMU name is uncore_#blockname_#pmuidx
1624  */
1625 static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
1626 {
1627 	char *end_a, *end_b;
1628 
1629 	end_a = strrchr(pmu_name_a, '_');
1630 	end_b = strrchr(pmu_name_b, '_');
1631 
1632 	if (!end_a || !end_b)
1633 		return false;
1634 
1635 	if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
1636 		return false;
1637 
1638 	return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
1639 }
1640 
1641 static int
1642 parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
1643 					   struct parse_events_state *parse_state)
1644 {
1645 	struct evsel *evsel, *leader;
1646 	uintptr_t *leaders;
1647 	bool is_leader = true;
1648 	int i, nr_pmu = 0, total_members, ret = 0;
1649 
1650 	leader = list_first_entry(list, struct evsel, core.node);
1651 	evsel = list_last_entry(list, struct evsel, core.node);
1652 	total_members = evsel->idx - leader->idx + 1;
1653 
1654 	leaders = calloc(total_members, sizeof(uintptr_t));
1655 	if (WARN_ON(!leaders))
1656 		return 0;
1657 
1658 	/*
1659 	 * Going through the whole group and doing sanity check.
1660 	 * All members must use alias, and be from the same uncore block.
1661 	 * Also, storing the leader events in an array.
1662 	 */
1663 	__evlist__for_each_entry(list, evsel) {
1664 
1665 		/* Only split the uncore group which members use alias */
1666 		if (!evsel->use_uncore_alias)
1667 			goto out;
1668 
1669 		/* The events must be from the same uncore block */
1670 		if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
1671 			goto out;
1672 
1673 		if (!is_leader)
1674 			continue;
1675 		/*
1676 		 * If the event's PMU name starts to repeat, it must be a new
1677 		 * event. That can be used to distinguish the leader from
1678 		 * other members, even they have the same event name.
1679 		 */
1680 		if ((leader != evsel) &&
1681 		    !strcmp(leader->pmu_name, evsel->pmu_name)) {
1682 			is_leader = false;
1683 			continue;
1684 		}
1685 
1686 		/* Store the leader event for each PMU */
1687 		leaders[nr_pmu++] = (uintptr_t) evsel;
1688 	}
1689 
1690 	/* only one event alias */
1691 	if (nr_pmu == total_members) {
1692 		parse_state->nr_groups--;
1693 		goto handled;
1694 	}
1695 
1696 	/*
1697 	 * An uncore event alias is a joint name which means the same event
1698 	 * runs on all PMUs of a block.
1699 	 * Perf doesn't support mixed events from different PMUs in the same
1700 	 * group. The big group has to be split into multiple small groups
1701 	 * which only include the events from the same PMU.
1702 	 *
1703 	 * Here the uncore event aliases must be from the same uncore block.
1704 	 * The number of PMUs must be same for each alias. The number of new
1705 	 * small groups equals to the number of PMUs.
1706 	 * Setting the leader event for corresponding members in each group.
1707 	 */
1708 	i = 0;
1709 	__evlist__for_each_entry(list, evsel) {
1710 		if (i >= nr_pmu)
1711 			i = 0;
1712 		evsel->leader = (struct evsel *) leaders[i++];
1713 	}
1714 
1715 	/* The number of members and group name are same for each group */
1716 	for (i = 0; i < nr_pmu; i++) {
1717 		evsel = (struct evsel *) leaders[i];
1718 		evsel->core.nr_members = total_members / nr_pmu;
1719 		evsel->group_name = name ? strdup(name) : NULL;
1720 	}
1721 
1722 	/* Take the new small groups into account */
1723 	parse_state->nr_groups += nr_pmu - 1;
1724 
1725 handled:
1726 	ret = 1;
1727 out:
1728 	free(leaders);
1729 	return ret;
1730 }
1731 
1732 void parse_events__set_leader(char *name, struct list_head *list,
1733 			      struct parse_events_state *parse_state)
1734 {
1735 	struct evsel *leader;
1736 
1737 	if (list_empty(list)) {
1738 		WARN_ONCE(true, "WARNING: failed to set leader: empty list");
1739 		return;
1740 	}
1741 
1742 	if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
1743 		return;
1744 
1745 	__perf_evlist__set_leader(list);
1746 	leader = list_entry(list->next, struct evsel, core.node);
1747 	leader->group_name = name ? strdup(name) : NULL;
1748 }
1749 
1750 /* list_event is assumed to point to malloc'ed memory */
1751 void parse_events_update_lists(struct list_head *list_event,
1752 			       struct list_head *list_all)
1753 {
1754 	/*
1755 	 * Called for single event definition. Update the
1756 	 * 'all event' list, and reinit the 'single event'
1757 	 * list, for next event definition.
1758 	 */
1759 	list_splice_tail(list_event, list_all);
1760 	free(list_event);
1761 }
1762 
1763 struct event_modifier {
1764 	int eu;
1765 	int ek;
1766 	int eh;
1767 	int eH;
1768 	int eG;
1769 	int eI;
1770 	int precise;
1771 	int precise_max;
1772 	int exclude_GH;
1773 	int sample_read;
1774 	int pinned;
1775 	int weak;
1776 };
1777 
1778 static int get_event_modifier(struct event_modifier *mod, char *str,
1779 			       struct evsel *evsel)
1780 {
1781 	int eu = evsel ? evsel->core.attr.exclude_user : 0;
1782 	int ek = evsel ? evsel->core.attr.exclude_kernel : 0;
1783 	int eh = evsel ? evsel->core.attr.exclude_hv : 0;
1784 	int eH = evsel ? evsel->core.attr.exclude_host : 0;
1785 	int eG = evsel ? evsel->core.attr.exclude_guest : 0;
1786 	int eI = evsel ? evsel->core.attr.exclude_idle : 0;
1787 	int precise = evsel ? evsel->core.attr.precise_ip : 0;
1788 	int precise_max = 0;
1789 	int sample_read = 0;
1790 	int pinned = evsel ? evsel->core.attr.pinned : 0;
1791 
1792 	int exclude = eu | ek | eh;
1793 	int exclude_GH = evsel ? evsel->exclude_GH : 0;
1794 	int weak = 0;
1795 
1796 	memset(mod, 0, sizeof(*mod));
1797 
1798 	while (*str) {
1799 		if (*str == 'u') {
1800 			if (!exclude)
1801 				exclude = eu = ek = eh = 1;
1802 			if (!exclude_GH && !perf_guest)
1803 				eG = 1;
1804 			eu = 0;
1805 		} else if (*str == 'k') {
1806 			if (!exclude)
1807 				exclude = eu = ek = eh = 1;
1808 			ek = 0;
1809 		} else if (*str == 'h') {
1810 			if (!exclude)
1811 				exclude = eu = ek = eh = 1;
1812 			eh = 0;
1813 		} else if (*str == 'G') {
1814 			if (!exclude_GH)
1815 				exclude_GH = eG = eH = 1;
1816 			eG = 0;
1817 		} else if (*str == 'H') {
1818 			if (!exclude_GH)
1819 				exclude_GH = eG = eH = 1;
1820 			eH = 0;
1821 		} else if (*str == 'I') {
1822 			eI = 1;
1823 		} else if (*str == 'p') {
1824 			precise++;
1825 			/* use of precise requires exclude_guest */
1826 			if (!exclude_GH)
1827 				eG = 1;
1828 		} else if (*str == 'P') {
1829 			precise_max = 1;
1830 		} else if (*str == 'S') {
1831 			sample_read = 1;
1832 		} else if (*str == 'D') {
1833 			pinned = 1;
1834 		} else if (*str == 'W') {
1835 			weak = 1;
1836 		} else
1837 			break;
1838 
1839 		++str;
1840 	}
1841 
1842 	/*
1843 	 * precise ip:
1844 	 *
1845 	 *  0 - SAMPLE_IP can have arbitrary skid
1846 	 *  1 - SAMPLE_IP must have constant skid
1847 	 *  2 - SAMPLE_IP requested to have 0 skid
1848 	 *  3 - SAMPLE_IP must have 0 skid
1849 	 *
1850 	 *  See also PERF_RECORD_MISC_EXACT_IP
1851 	 */
1852 	if (precise > 3)
1853 		return -EINVAL;
1854 
1855 	mod->eu = eu;
1856 	mod->ek = ek;
1857 	mod->eh = eh;
1858 	mod->eH = eH;
1859 	mod->eG = eG;
1860 	mod->eI = eI;
1861 	mod->precise = precise;
1862 	mod->precise_max = precise_max;
1863 	mod->exclude_GH = exclude_GH;
1864 	mod->sample_read = sample_read;
1865 	mod->pinned = pinned;
1866 	mod->weak = weak;
1867 
1868 	return 0;
1869 }
1870 
1871 /*
1872  * Basic modifier sanity check to validate it contains only one
1873  * instance of any modifier (apart from 'p') present.
1874  */
1875 static int check_modifier(char *str)
1876 {
1877 	char *p = str;
1878 
1879 	/* The sizeof includes 0 byte as well. */
1880 	if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1881 		return -1;
1882 
1883 	while (*p) {
1884 		if (*p != 'p' && strchr(p + 1, *p))
1885 			return -1;
1886 		p++;
1887 	}
1888 
1889 	return 0;
1890 }
1891 
1892 int parse_events__modifier_event(struct list_head *list, char *str, bool add)
1893 {
1894 	struct evsel *evsel;
1895 	struct event_modifier mod;
1896 
1897 	if (str == NULL)
1898 		return 0;
1899 
1900 	if (check_modifier(str))
1901 		return -EINVAL;
1902 
1903 	if (!add && get_event_modifier(&mod, str, NULL))
1904 		return -EINVAL;
1905 
1906 	__evlist__for_each_entry(list, evsel) {
1907 		if (add && get_event_modifier(&mod, str, evsel))
1908 			return -EINVAL;
1909 
1910 		evsel->core.attr.exclude_user   = mod.eu;
1911 		evsel->core.attr.exclude_kernel = mod.ek;
1912 		evsel->core.attr.exclude_hv     = mod.eh;
1913 		evsel->core.attr.precise_ip     = mod.precise;
1914 		evsel->core.attr.exclude_host   = mod.eH;
1915 		evsel->core.attr.exclude_guest  = mod.eG;
1916 		evsel->core.attr.exclude_idle   = mod.eI;
1917 		evsel->exclude_GH          = mod.exclude_GH;
1918 		evsel->sample_read         = mod.sample_read;
1919 		evsel->precise_max         = mod.precise_max;
1920 		evsel->weak_group	   = mod.weak;
1921 
1922 		if (evsel__is_group_leader(evsel))
1923 			evsel->core.attr.pinned = mod.pinned;
1924 	}
1925 
1926 	return 0;
1927 }
1928 
1929 int parse_events_name(struct list_head *list, char *name)
1930 {
1931 	struct evsel *evsel;
1932 
1933 	__evlist__for_each_entry(list, evsel) {
1934 		if (!evsel->name)
1935 			evsel->name = strdup(name);
1936 	}
1937 
1938 	return 0;
1939 }
1940 
1941 static int
1942 comp_pmu(const void *p1, const void *p2)
1943 {
1944 	struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
1945 	struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;
1946 
1947 	return strcasecmp(pmu1->symbol, pmu2->symbol);
1948 }
1949 
1950 static void perf_pmu__parse_cleanup(void)
1951 {
1952 	if (perf_pmu_events_list_num > 0) {
1953 		struct perf_pmu_event_symbol *p;
1954 		int i;
1955 
1956 		for (i = 0; i < perf_pmu_events_list_num; i++) {
1957 			p = perf_pmu_events_list + i;
1958 			zfree(&p->symbol);
1959 		}
1960 		zfree(&perf_pmu_events_list);
1961 		perf_pmu_events_list_num = 0;
1962 	}
1963 }
1964 
1965 #define SET_SYMBOL(str, stype)		\
1966 do {					\
1967 	p->symbol = str;		\
1968 	if (!p->symbol)			\
1969 		goto err;		\
1970 	p->type = stype;		\
1971 } while (0)
1972 
1973 /*
1974  * Read the pmu events list from sysfs
1975  * Save it into perf_pmu_events_list
1976  */
1977 static void perf_pmu__parse_init(void)
1978 {
1979 
1980 	struct perf_pmu *pmu = NULL;
1981 	struct perf_pmu_alias *alias;
1982 	int len = 0;
1983 
1984 	pmu = NULL;
1985 	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
1986 		list_for_each_entry(alias, &pmu->aliases, list) {
1987 			if (strchr(alias->name, '-'))
1988 				len++;
1989 			len++;
1990 		}
1991 	}
1992 
1993 	if (len == 0) {
1994 		perf_pmu_events_list_num = -1;
1995 		return;
1996 	}
1997 	perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
1998 	if (!perf_pmu_events_list)
1999 		return;
2000 	perf_pmu_events_list_num = len;
2001 
2002 	len = 0;
2003 	pmu = NULL;
2004 	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
2005 		list_for_each_entry(alias, &pmu->aliases, list) {
2006 			struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
2007 			char *tmp = strchr(alias->name, '-');
2008 
2009 			if (tmp != NULL) {
2010 				SET_SYMBOL(strndup(alias->name, tmp - alias->name),
2011 						PMU_EVENT_SYMBOL_PREFIX);
2012 				p++;
2013 				SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
2014 				len += 2;
2015 			} else {
2016 				SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
2017 				len++;
2018 			}
2019 		}
2020 	}
2021 	qsort(perf_pmu_events_list, len,
2022 		sizeof(struct perf_pmu_event_symbol), comp_pmu);
2023 
2024 	return;
2025 err:
2026 	perf_pmu__parse_cleanup();
2027 }
2028 
2029 /*
2030  * This function injects special term in
2031  * perf_pmu_events_list so the test code
2032  * can check on this functionality.
2033  */
2034 int perf_pmu__test_parse_init(void)
2035 {
2036 	struct perf_pmu_event_symbol *list;
2037 
2038 	list = malloc(sizeof(*list) * 1);
2039 	if (!list)
2040 		return -ENOMEM;
2041 
2042 	list->type   = PMU_EVENT_SYMBOL;
2043 	list->symbol = strdup("read");
2044 
2045 	if (!list->symbol) {
2046 		free(list);
2047 		return -ENOMEM;
2048 	}
2049 
2050 	perf_pmu_events_list = list;
2051 	perf_pmu_events_list_num = 1;
2052 	return 0;
2053 }
2054 
2055 enum perf_pmu_event_symbol_type
2056 perf_pmu__parse_check(const char *name)
2057 {
2058 	struct perf_pmu_event_symbol p, *r;
2059 
2060 	/* scan kernel pmu events from sysfs if needed */
2061 	if (perf_pmu_events_list_num == 0)
2062 		perf_pmu__parse_init();
2063 	/*
2064 	 * name "cpu" could be prefix of cpu-cycles or cpu// events.
2065 	 * cpu-cycles has been handled by hardcode.
2066 	 * So it must be cpu// events, not kernel pmu event.
2067 	 */
2068 	if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
2069 		return PMU_EVENT_SYMBOL_ERR;
2070 
2071 	p.symbol = strdup(name);
2072 	r = bsearch(&p, perf_pmu_events_list,
2073 			(size_t) perf_pmu_events_list_num,
2074 			sizeof(struct perf_pmu_event_symbol), comp_pmu);
2075 	zfree(&p.symbol);
2076 	return r ? r->type : PMU_EVENT_SYMBOL_ERR;
2077 }
2078 
2079 static int parse_events__scanner(const char *str,
2080 				 struct parse_events_state *parse_state)
2081 {
2082 	YY_BUFFER_STATE buffer;
2083 	void *scanner;
2084 	int ret;
2085 
2086 	ret = parse_events_lex_init_extra(parse_state, &scanner);
2087 	if (ret)
2088 		return ret;
2089 
2090 	buffer = parse_events__scan_string(str, scanner);
2091 
2092 #ifdef PARSER_DEBUG
2093 	parse_events_debug = 1;
2094 	parse_events_set_debug(1, scanner);
2095 #endif
2096 	ret = parse_events_parse(parse_state, scanner);
2097 
2098 	parse_events__flush_buffer(buffer, scanner);
2099 	parse_events__delete_buffer(buffer, scanner);
2100 	parse_events_lex_destroy(scanner);
2101 	return ret;
2102 }
2103 
2104 /*
2105  * parse event config string, return a list of event terms.
2106  */
2107 int parse_events_terms(struct list_head *terms, const char *str)
2108 {
2109 	struct parse_events_state parse_state = {
2110 		.terms  = NULL,
2111 		.stoken = PE_START_TERMS,
2112 	};
2113 	int ret;
2114 
2115 	ret = parse_events__scanner(str, &parse_state);
2116 	perf_pmu__parse_cleanup();
2117 
2118 	if (!ret) {
2119 		list_splice(parse_state.terms, terms);
2120 		zfree(&parse_state.terms);
2121 		return 0;
2122 	}
2123 
2124 	parse_events_terms__delete(parse_state.terms);
2125 	return ret;
2126 }
2127 
2128 int __parse_events(struct evlist *evlist, const char *str,
2129 		   struct parse_events_error *err, struct perf_pmu *fake_pmu)
2130 {
2131 	struct parse_events_state parse_state = {
2132 		.list	  = LIST_HEAD_INIT(parse_state.list),
2133 		.idx	  = evlist->core.nr_entries,
2134 		.error	  = err,
2135 		.evlist	  = evlist,
2136 		.stoken	  = PE_START_EVENTS,
2137 		.fake_pmu = fake_pmu,
2138 	};
2139 	int ret;
2140 
2141 	ret = parse_events__scanner(str, &parse_state);
2142 	perf_pmu__parse_cleanup();
2143 
2144 	if (!ret && list_empty(&parse_state.list)) {
2145 		WARN_ONCE(true, "WARNING: event parser found nothing\n");
2146 		return -1;
2147 	}
2148 
2149 	/*
2150 	 * Add list to the evlist even with errors to allow callers to clean up.
2151 	 */
2152 	perf_evlist__splice_list_tail(evlist, &parse_state.list);
2153 
2154 	if (!ret) {
2155 		struct evsel *last;
2156 
2157 		evlist->nr_groups += parse_state.nr_groups;
2158 		last = evlist__last(evlist);
2159 		last->cmdline_group_boundary = true;
2160 
2161 		return 0;
2162 	}
2163 
2164 	/*
2165 	 * There are 2 users - builtin-record and builtin-test objects.
2166 	 * Both call evlist__delete in case of error, so we dont
2167 	 * need to bother.
2168 	 */
2169 	return ret;
2170 }
2171 
2172 #define MAX_WIDTH 1000
2173 static int get_term_width(void)
2174 {
2175 	struct winsize ws;
2176 
2177 	get_term_dimensions(&ws);
2178 	return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
2179 }
2180 
2181 static void __parse_events_print_error(int err_idx, const char *err_str,
2182 				const char *err_help, const char *event)
2183 {
2184 	const char *str = "invalid or unsupported event: ";
2185 	char _buf[MAX_WIDTH];
2186 	char *buf = (char *) event;
2187 	int idx = 0;
2188 	if (err_str) {
2189 		/* -2 for extra '' in the final fprintf */
2190 		int width       = get_term_width() - 2;
2191 		int len_event   = strlen(event);
2192 		int len_str, max_len, cut = 0;
2193 
2194 		/*
2195 		 * Maximum error index indent, we will cut
2196 		 * the event string if it's bigger.
2197 		 */
2198 		int max_err_idx = 13;
2199 
2200 		/*
2201 		 * Let's be specific with the message when
2202 		 * we have the precise error.
2203 		 */
2204 		str     = "event syntax error: ";
2205 		len_str = strlen(str);
2206 		max_len = width - len_str;
2207 
2208 		buf = _buf;
2209 
2210 		/* We're cutting from the beginning. */
2211 		if (err_idx > max_err_idx)
2212 			cut = err_idx - max_err_idx;
2213 
2214 		strncpy(buf, event + cut, max_len);
2215 
2216 		/* Mark cut parts with '..' on both sides. */
2217 		if (cut)
2218 			buf[0] = buf[1] = '.';
2219 
2220 		if ((len_event - cut) > max_len) {
2221 			buf[max_len - 1] = buf[max_len - 2] = '.';
2222 			buf[max_len] = 0;
2223 		}
2224 
2225 		idx = len_str + err_idx - cut;
2226 	}
2227 
2228 	fprintf(stderr, "%s'%s'\n", str, buf);
2229 	if (idx) {
2230 		fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err_str);
2231 		if (err_help)
2232 			fprintf(stderr, "\n%s\n", err_help);
2233 	}
2234 }
2235 
2236 void parse_events_print_error(struct parse_events_error *err,
2237 			      const char *event)
2238 {
2239 	if (!err->num_errors)
2240 		return;
2241 
2242 	__parse_events_print_error(err->idx, err->str, err->help, event);
2243 	zfree(&err->str);
2244 	zfree(&err->help);
2245 
2246 	if (err->num_errors > 1) {
2247 		fputs("\nInitial error:\n", stderr);
2248 		__parse_events_print_error(err->first_idx, err->first_str,
2249 					err->first_help, event);
2250 		zfree(&err->first_str);
2251 		zfree(&err->first_help);
2252 	}
2253 }
2254 
2255 #undef MAX_WIDTH
2256 
2257 int parse_events_option(const struct option *opt, const char *str,
2258 			int unset __maybe_unused)
2259 {
2260 	struct evlist *evlist = *(struct evlist **)opt->value;
2261 	struct parse_events_error err;
2262 	int ret;
2263 
2264 	bzero(&err, sizeof(err));
2265 	ret = parse_events(evlist, str, &err);
2266 
2267 	if (ret) {
2268 		parse_events_print_error(&err, str);
2269 		fprintf(stderr, "Run 'perf list' for a list of valid events\n");
2270 	}
2271 
2272 	return ret;
2273 }
2274 
2275 int parse_events_option_new_evlist(const struct option *opt, const char *str, int unset)
2276 {
2277 	struct evlist **evlistp = opt->value;
2278 	int ret;
2279 
2280 	if (*evlistp == NULL) {
2281 		*evlistp = evlist__new();
2282 
2283 		if (*evlistp == NULL) {
2284 			fprintf(stderr, "Not enough memory to create evlist\n");
2285 			return -1;
2286 		}
2287 	}
2288 
2289 	ret = parse_events_option(opt, str, unset);
2290 	if (ret) {
2291 		evlist__delete(*evlistp);
2292 		*evlistp = NULL;
2293 	}
2294 
2295 	return ret;
2296 }
2297 
2298 static int
2299 foreach_evsel_in_last_glob(struct evlist *evlist,
2300 			   int (*func)(struct evsel *evsel,
2301 				       const void *arg),
2302 			   const void *arg)
2303 {
2304 	struct evsel *last = NULL;
2305 	int err;
2306 
2307 	/*
2308 	 * Don't return when list_empty, give func a chance to report
2309 	 * error when it found last == NULL.
2310 	 *
2311 	 * So no need to WARN here, let *func do this.
2312 	 */
2313 	if (evlist->core.nr_entries > 0)
2314 		last = evlist__last(evlist);
2315 
2316 	do {
2317 		err = (*func)(last, arg);
2318 		if (err)
2319 			return -1;
2320 		if (!last)
2321 			return 0;
2322 
2323 		if (last->core.node.prev == &evlist->core.entries)
2324 			return 0;
2325 		last = list_entry(last->core.node.prev, struct evsel, core.node);
2326 	} while (!last->cmdline_group_boundary);
2327 
2328 	return 0;
2329 }
2330 
2331 static int set_filter(struct evsel *evsel, const void *arg)
2332 {
2333 	const char *str = arg;
2334 	bool found = false;
2335 	int nr_addr_filters = 0;
2336 	struct perf_pmu *pmu = NULL;
2337 
2338 	if (evsel == NULL) {
2339 		fprintf(stderr,
2340 			"--filter option should follow a -e tracepoint or HW tracer option\n");
2341 		return -1;
2342 	}
2343 
2344 	if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) {
2345 		if (evsel__append_tp_filter(evsel, str) < 0) {
2346 			fprintf(stderr,
2347 				"not enough memory to hold filter string\n");
2348 			return -1;
2349 		}
2350 
2351 		return 0;
2352 	}
2353 
2354 	while ((pmu = perf_pmu__scan(pmu)) != NULL)
2355 		if (pmu->type == evsel->core.attr.type) {
2356 			found = true;
2357 			break;
2358 		}
2359 
2360 	if (found)
2361 		perf_pmu__scan_file(pmu, "nr_addr_filters",
2362 				    "%d", &nr_addr_filters);
2363 
2364 	if (!nr_addr_filters) {
2365 		fprintf(stderr,
2366 			"This CPU does not support address filtering\n");
2367 		return -1;
2368 	}
2369 
2370 	if (evsel__append_addr_filter(evsel, str) < 0) {
2371 		fprintf(stderr,
2372 			"not enough memory to hold filter string\n");
2373 		return -1;
2374 	}
2375 
2376 	return 0;
2377 }
2378 
2379 int parse_filter(const struct option *opt, const char *str,
2380 		 int unset __maybe_unused)
2381 {
2382 	struct evlist *evlist = *(struct evlist **)opt->value;
2383 
2384 	return foreach_evsel_in_last_glob(evlist, set_filter,
2385 					  (const void *)str);
2386 }
2387 
2388 static int add_exclude_perf_filter(struct evsel *evsel,
2389 				   const void *arg __maybe_unused)
2390 {
2391 	char new_filter[64];
2392 
2393 	if (evsel == NULL || evsel->core.attr.type != PERF_TYPE_TRACEPOINT) {
2394 		fprintf(stderr,
2395 			"--exclude-perf option should follow a -e tracepoint option\n");
2396 		return -1;
2397 	}
2398 
2399 	snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());
2400 
2401 	if (evsel__append_tp_filter(evsel, new_filter) < 0) {
2402 		fprintf(stderr,
2403 			"not enough memory to hold filter string\n");
2404 		return -1;
2405 	}
2406 
2407 	return 0;
2408 }
2409 
2410 int exclude_perf(const struct option *opt,
2411 		 const char *arg __maybe_unused,
2412 		 int unset __maybe_unused)
2413 {
2414 	struct evlist *evlist = *(struct evlist **)opt->value;
2415 
2416 	return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
2417 					  NULL);
2418 }
2419 
2420 static const char * const event_type_descriptors[] = {
2421 	"Hardware event",
2422 	"Software event",
2423 	"Tracepoint event",
2424 	"Hardware cache event",
2425 	"Raw hardware event descriptor",
2426 	"Hardware breakpoint",
2427 };
2428 
2429 static int cmp_string(const void *a, const void *b)
2430 {
2431 	const char * const *as = a;
2432 	const char * const *bs = b;
2433 
2434 	return strcmp(*as, *bs);
2435 }
2436 
2437 /*
2438  * Print the events from <debugfs_mount_point>/tracing/events
2439  */
2440 
2441 void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
2442 			     bool name_only)
2443 {
2444 	DIR *sys_dir, *evt_dir;
2445 	struct dirent *sys_dirent, *evt_dirent;
2446 	char evt_path[MAXPATHLEN];
2447 	char *dir_path;
2448 	char **evt_list = NULL;
2449 	unsigned int evt_i = 0, evt_num = 0;
2450 	bool evt_num_known = false;
2451 
2452 restart:
2453 	sys_dir = tracing_events__opendir();
2454 	if (!sys_dir)
2455 		return;
2456 
2457 	if (evt_num_known) {
2458 		evt_list = zalloc(sizeof(char *) * evt_num);
2459 		if (!evt_list)
2460 			goto out_close_sys_dir;
2461 	}
2462 
2463 	for_each_subsystem(sys_dir, sys_dirent) {
2464 		if (subsys_glob != NULL &&
2465 		    !strglobmatch(sys_dirent->d_name, subsys_glob))
2466 			continue;
2467 
2468 		dir_path = get_events_file(sys_dirent->d_name);
2469 		if (!dir_path)
2470 			continue;
2471 		evt_dir = opendir(dir_path);
2472 		if (!evt_dir)
2473 			goto next;
2474 
2475 		for_each_event(dir_path, evt_dir, evt_dirent) {
2476 			if (event_glob != NULL &&
2477 			    !strglobmatch(evt_dirent->d_name, event_glob))
2478 				continue;
2479 
2480 			if (!evt_num_known) {
2481 				evt_num++;
2482 				continue;
2483 			}
2484 
2485 			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2486 				 sys_dirent->d_name, evt_dirent->d_name);
2487 
2488 			evt_list[evt_i] = strdup(evt_path);
2489 			if (evt_list[evt_i] == NULL) {
2490 				put_events_file(dir_path);
2491 				goto out_close_evt_dir;
2492 			}
2493 			evt_i++;
2494 		}
2495 		closedir(evt_dir);
2496 next:
2497 		put_events_file(dir_path);
2498 	}
2499 	closedir(sys_dir);
2500 
2501 	if (!evt_num_known) {
2502 		evt_num_known = true;
2503 		goto restart;
2504 	}
2505 	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2506 	evt_i = 0;
2507 	while (evt_i < evt_num) {
2508 		if (name_only) {
2509 			printf("%s ", evt_list[evt_i++]);
2510 			continue;
2511 		}
2512 		printf("  %-50s [%s]\n", evt_list[evt_i++],
2513 				event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2514 	}
2515 	if (evt_num && pager_in_use())
2516 		printf("\n");
2517 
2518 out_free:
2519 	evt_num = evt_i;
2520 	for (evt_i = 0; evt_i < evt_num; evt_i++)
2521 		zfree(&evt_list[evt_i]);
2522 	zfree(&evt_list);
2523 	return;
2524 
2525 out_close_evt_dir:
2526 	closedir(evt_dir);
2527 out_close_sys_dir:
2528 	closedir(sys_dir);
2529 
2530 	printf("FATAL: not enough memory to print %s\n",
2531 			event_type_descriptors[PERF_TYPE_TRACEPOINT]);
2532 	if (evt_list)
2533 		goto out_free;
2534 }
2535 
2536 /*
2537  * Check whether event is in <debugfs_mount_point>/tracing/events
2538  */
2539 
2540 int is_valid_tracepoint(const char *event_string)
2541 {
2542 	DIR *sys_dir, *evt_dir;
2543 	struct dirent *sys_dirent, *evt_dirent;
2544 	char evt_path[MAXPATHLEN];
2545 	char *dir_path;
2546 
2547 	sys_dir = tracing_events__opendir();
2548 	if (!sys_dir)
2549 		return 0;
2550 
2551 	for_each_subsystem(sys_dir, sys_dirent) {
2552 		dir_path = get_events_file(sys_dirent->d_name);
2553 		if (!dir_path)
2554 			continue;
2555 		evt_dir = opendir(dir_path);
2556 		if (!evt_dir)
2557 			goto next;
2558 
2559 		for_each_event(dir_path, evt_dir, evt_dirent) {
2560 			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2561 				 sys_dirent->d_name, evt_dirent->d_name);
2562 			if (!strcmp(evt_path, event_string)) {
2563 				closedir(evt_dir);
2564 				closedir(sys_dir);
2565 				return 1;
2566 			}
2567 		}
2568 		closedir(evt_dir);
2569 next:
2570 		put_events_file(dir_path);
2571 	}
2572 	closedir(sys_dir);
2573 	return 0;
2574 }
2575 
2576 static bool is_event_supported(u8 type, unsigned config)
2577 {
2578 	bool ret = true;
2579 	int open_return;
2580 	struct evsel *evsel;
2581 	struct perf_event_attr attr = {
2582 		.type = type,
2583 		.config = config,
2584 		.disabled = 1,
2585 	};
2586 	struct perf_thread_map *tmap = thread_map__new_by_tid(0);
2587 
2588 	if (tmap == NULL)
2589 		return false;
2590 
2591 	evsel = evsel__new(&attr);
2592 	if (evsel) {
2593 		open_return = evsel__open(evsel, NULL, tmap);
2594 		ret = open_return >= 0;
2595 
2596 		if (open_return == -EACCES) {
2597 			/*
2598 			 * This happens if the paranoid value
2599 			 * /proc/sys/kernel/perf_event_paranoid is set to 2
2600 			 * Re-run with exclude_kernel set; we don't do that
2601 			 * by default as some ARM machines do not support it.
2602 			 *
2603 			 */
2604 			evsel->core.attr.exclude_kernel = 1;
2605 			ret = evsel__open(evsel, NULL, tmap) >= 0;
2606 		}
2607 		evsel__delete(evsel);
2608 	}
2609 
2610 	perf_thread_map__put(tmap);
2611 	return ret;
2612 }
2613 
2614 void print_sdt_events(const char *subsys_glob, const char *event_glob,
2615 		      bool name_only)
2616 {
2617 	struct probe_cache *pcache;
2618 	struct probe_cache_entry *ent;
2619 	struct strlist *bidlist, *sdtlist;
2620 	struct strlist_config cfg = {.dont_dupstr = true};
2621 	struct str_node *nd, *nd2;
2622 	char *buf, *path, *ptr = NULL;
2623 	bool show_detail = false;
2624 	int ret;
2625 
2626 	sdtlist = strlist__new(NULL, &cfg);
2627 	if (!sdtlist) {
2628 		pr_debug("Failed to allocate new strlist for SDT\n");
2629 		return;
2630 	}
2631 	bidlist = build_id_cache__list_all(true);
2632 	if (!bidlist) {
2633 		pr_debug("Failed to get buildids: %d\n", errno);
2634 		return;
2635 	}
2636 	strlist__for_each_entry(nd, bidlist) {
2637 		pcache = probe_cache__new(nd->s, NULL);
2638 		if (!pcache)
2639 			continue;
2640 		list_for_each_entry(ent, &pcache->entries, node) {
2641 			if (!ent->sdt)
2642 				continue;
2643 			if (subsys_glob &&
2644 			    !strglobmatch(ent->pev.group, subsys_glob))
2645 				continue;
2646 			if (event_glob &&
2647 			    !strglobmatch(ent->pev.event, event_glob))
2648 				continue;
2649 			ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
2650 					ent->pev.event, nd->s);
2651 			if (ret > 0)
2652 				strlist__add(sdtlist, buf);
2653 		}
2654 		probe_cache__delete(pcache);
2655 	}
2656 	strlist__delete(bidlist);
2657 
2658 	strlist__for_each_entry(nd, sdtlist) {
2659 		buf = strchr(nd->s, '@');
2660 		if (buf)
2661 			*(buf++) = '\0';
2662 		if (name_only) {
2663 			printf("%s ", nd->s);
2664 			continue;
2665 		}
2666 		nd2 = strlist__next(nd);
2667 		if (nd2) {
2668 			ptr = strchr(nd2->s, '@');
2669 			if (ptr)
2670 				*ptr = '\0';
2671 			if (strcmp(nd->s, nd2->s) == 0)
2672 				show_detail = true;
2673 		}
2674 		if (show_detail) {
2675 			path = build_id_cache__origname(buf);
2676 			ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
2677 			if (ret > 0) {
2678 				printf("  %-50s [%s]\n", buf, "SDT event");
2679 				free(buf);
2680 			}
2681 			free(path);
2682 		} else
2683 			printf("  %-50s [%s]\n", nd->s, "SDT event");
2684 		if (nd2) {
2685 			if (strcmp(nd->s, nd2->s) != 0)
2686 				show_detail = false;
2687 			if (ptr)
2688 				*ptr = '@';
2689 		}
2690 	}
2691 	strlist__delete(sdtlist);
2692 }
2693 
2694 int print_hwcache_events(const char *event_glob, bool name_only)
2695 {
2696 	unsigned int type, op, i, evt_i = 0, evt_num = 0;
2697 	char name[64];
2698 	char **evt_list = NULL;
2699 	bool evt_num_known = false;
2700 
2701 restart:
2702 	if (evt_num_known) {
2703 		evt_list = zalloc(sizeof(char *) * evt_num);
2704 		if (!evt_list)
2705 			goto out_enomem;
2706 	}
2707 
2708 	for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
2709 		for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
2710 			/* skip invalid cache type */
2711 			if (!evsel__is_cache_op_valid(type, op))
2712 				continue;
2713 
2714 			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2715 				__evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name));
2716 				if (event_glob != NULL && !strglobmatch(name, event_glob))
2717 					continue;
2718 
2719 				if (!is_event_supported(PERF_TYPE_HW_CACHE,
2720 							type | (op << 8) | (i << 16)))
2721 					continue;
2722 
2723 				if (!evt_num_known) {
2724 					evt_num++;
2725 					continue;
2726 				}
2727 
2728 				evt_list[evt_i] = strdup(name);
2729 				if (evt_list[evt_i] == NULL)
2730 					goto out_enomem;
2731 				evt_i++;
2732 			}
2733 		}
2734 	}
2735 
2736 	if (!evt_num_known) {
2737 		evt_num_known = true;
2738 		goto restart;
2739 	}
2740 	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2741 	evt_i = 0;
2742 	while (evt_i < evt_num) {
2743 		if (name_only) {
2744 			printf("%s ", evt_list[evt_i++]);
2745 			continue;
2746 		}
2747 		printf("  %-50s [%s]\n", evt_list[evt_i++],
2748 				event_type_descriptors[PERF_TYPE_HW_CACHE]);
2749 	}
2750 	if (evt_num && pager_in_use())
2751 		printf("\n");
2752 
2753 out_free:
2754 	evt_num = evt_i;
2755 	for (evt_i = 0; evt_i < evt_num; evt_i++)
2756 		zfree(&evt_list[evt_i]);
2757 	zfree(&evt_list);
2758 	return evt_num;
2759 
2760 out_enomem:
2761 	printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
2762 	if (evt_list)
2763 		goto out_free;
2764 	return evt_num;
2765 }
2766 
2767 static void print_tool_event(const char *name, const char *event_glob,
2768 			     bool name_only)
2769 {
2770 	if (event_glob && !strglobmatch(name, event_glob))
2771 		return;
2772 	if (name_only)
2773 		printf("%s ", name);
2774 	else
2775 		printf("  %-50s [%s]\n", name, "Tool event");
2776 
2777 }
2778 
2779 void print_tool_events(const char *event_glob, bool name_only)
2780 {
2781 	print_tool_event("duration_time", event_glob, name_only);
2782 	if (pager_in_use())
2783 		printf("\n");
2784 }
2785 
2786 void print_symbol_events(const char *event_glob, unsigned type,
2787 				struct event_symbol *syms, unsigned max,
2788 				bool name_only)
2789 {
2790 	unsigned int i, evt_i = 0, evt_num = 0;
2791 	char name[MAX_NAME_LEN];
2792 	char **evt_list = NULL;
2793 	bool evt_num_known = false;
2794 
2795 restart:
2796 	if (evt_num_known) {
2797 		evt_list = zalloc(sizeof(char *) * evt_num);
2798 		if (!evt_list)
2799 			goto out_enomem;
2800 		syms -= max;
2801 	}
2802 
2803 	for (i = 0; i < max; i++, syms++) {
2804 
2805 		if (event_glob != NULL && syms->symbol != NULL &&
2806 		    !(strglobmatch(syms->symbol, event_glob) ||
2807 		      (syms->alias && strglobmatch(syms->alias, event_glob))))
2808 			continue;
2809 
2810 		if (!is_event_supported(type, i))
2811 			continue;
2812 
2813 		if (!evt_num_known) {
2814 			evt_num++;
2815 			continue;
2816 		}
2817 
2818 		if (!name_only && strlen(syms->alias))
2819 			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2820 		else
2821 			strlcpy(name, syms->symbol, MAX_NAME_LEN);
2822 
2823 		evt_list[evt_i] = strdup(name);
2824 		if (evt_list[evt_i] == NULL)
2825 			goto out_enomem;
2826 		evt_i++;
2827 	}
2828 
2829 	if (!evt_num_known) {
2830 		evt_num_known = true;
2831 		goto restart;
2832 	}
2833 	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
2834 	evt_i = 0;
2835 	while (evt_i < evt_num) {
2836 		if (name_only) {
2837 			printf("%s ", evt_list[evt_i++]);
2838 			continue;
2839 		}
2840 		printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
2841 	}
2842 	if (evt_num && pager_in_use())
2843 		printf("\n");
2844 
2845 out_free:
2846 	evt_num = evt_i;
2847 	for (evt_i = 0; evt_i < evt_num; evt_i++)
2848 		zfree(&evt_list[evt_i]);
2849 	zfree(&evt_list);
2850 	return;
2851 
2852 out_enomem:
2853 	printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
2854 	if (evt_list)
2855 		goto out_free;
2856 }
2857 
2858 /*
2859  * Print the help text for the event symbols:
2860  */
2861 void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2862 			bool long_desc, bool details_flag, bool deprecated)
2863 {
2864 	print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2865 			    event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2866 
2867 	print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2868 			    event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2869 	print_tool_events(event_glob, name_only);
2870 
2871 	print_hwcache_events(event_glob, name_only);
2872 
2873 	print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
2874 			details_flag, deprecated);
2875 
2876 	if (event_glob != NULL)
2877 		return;
2878 
2879 	if (!name_only) {
2880 		printf("  %-50s [%s]\n",
2881 		       "rNNN",
2882 		       event_type_descriptors[PERF_TYPE_RAW]);
2883 		printf("  %-50s [%s]\n",
2884 		       "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
2885 		       event_type_descriptors[PERF_TYPE_RAW]);
2886 		if (pager_in_use())
2887 			printf("   (see 'man perf-list' on how to encode it)\n\n");
2888 
2889 		printf("  %-50s [%s]\n",
2890 		       "mem:<addr>[/len][:access]",
2891 			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2892 		if (pager_in_use())
2893 			printf("\n");
2894 	}
2895 
2896 	print_tracepoint_events(NULL, NULL, name_only);
2897 
2898 	print_sdt_events(NULL, NULL, name_only);
2899 
2900 	metricgroup__print(true, true, NULL, name_only, details_flag);
2901 
2902 	print_libpfm_events(name_only, long_desc);
2903 }
2904 
2905 int parse_events__is_hardcoded_term(struct parse_events_term *term)
2906 {
2907 	return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2908 }
2909 
2910 static int new_term(struct parse_events_term **_term,
2911 		    struct parse_events_term *temp,
2912 		    char *str, u64 num)
2913 {
2914 	struct parse_events_term *term;
2915 
2916 	term = malloc(sizeof(*term));
2917 	if (!term)
2918 		return -ENOMEM;
2919 
2920 	*term = *temp;
2921 	INIT_LIST_HEAD(&term->list);
2922 	term->weak = false;
2923 
2924 	switch (term->type_val) {
2925 	case PARSE_EVENTS__TERM_TYPE_NUM:
2926 		term->val.num = num;
2927 		break;
2928 	case PARSE_EVENTS__TERM_TYPE_STR:
2929 		term->val.str = str;
2930 		break;
2931 	default:
2932 		free(term);
2933 		return -EINVAL;
2934 	}
2935 
2936 	*_term = term;
2937 	return 0;
2938 }
2939 
2940 int parse_events_term__num(struct parse_events_term **term,
2941 			   int type_term, char *config, u64 num,
2942 			   bool no_value,
2943 			   void *loc_term_, void *loc_val_)
2944 {
2945 	YYLTYPE *loc_term = loc_term_;
2946 	YYLTYPE *loc_val = loc_val_;
2947 
2948 	struct parse_events_term temp = {
2949 		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
2950 		.type_term = type_term,
2951 		.config    = config,
2952 		.no_value  = no_value,
2953 		.err_term  = loc_term ? loc_term->first_column : 0,
2954 		.err_val   = loc_val  ? loc_val->first_column  : 0,
2955 	};
2956 
2957 	return new_term(term, &temp, NULL, num);
2958 }
2959 
2960 int parse_events_term__str(struct parse_events_term **term,
2961 			   int type_term, char *config, char *str,
2962 			   void *loc_term_, void *loc_val_)
2963 {
2964 	YYLTYPE *loc_term = loc_term_;
2965 	YYLTYPE *loc_val = loc_val_;
2966 
2967 	struct parse_events_term temp = {
2968 		.type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2969 		.type_term = type_term,
2970 		.config    = config,
2971 		.err_term  = loc_term ? loc_term->first_column : 0,
2972 		.err_val   = loc_val  ? loc_val->first_column  : 0,
2973 	};
2974 
2975 	return new_term(term, &temp, str, 0);
2976 }
2977 
2978 int parse_events_term__sym_hw(struct parse_events_term **term,
2979 			      char *config, unsigned idx)
2980 {
2981 	struct event_symbol *sym;
2982 	char *str;
2983 	struct parse_events_term temp = {
2984 		.type_val  = PARSE_EVENTS__TERM_TYPE_STR,
2985 		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
2986 		.config    = config,
2987 	};
2988 
2989 	if (!temp.config) {
2990 		temp.config = strdup("event");
2991 		if (!temp.config)
2992 			return -ENOMEM;
2993 	}
2994 	BUG_ON(idx >= PERF_COUNT_HW_MAX);
2995 	sym = &event_symbols_hw[idx];
2996 
2997 	str = strdup(sym->symbol);
2998 	if (!str)
2999 		return -ENOMEM;
3000 	return new_term(term, &temp, str, 0);
3001 }
3002 
3003 int parse_events_term__clone(struct parse_events_term **new,
3004 			     struct parse_events_term *term)
3005 {
3006 	char *str;
3007 	struct parse_events_term temp = {
3008 		.type_val  = term->type_val,
3009 		.type_term = term->type_term,
3010 		.config    = NULL,
3011 		.err_term  = term->err_term,
3012 		.err_val   = term->err_val,
3013 	};
3014 
3015 	if (term->config) {
3016 		temp.config = strdup(term->config);
3017 		if (!temp.config)
3018 			return -ENOMEM;
3019 	}
3020 	if (term->type_val == PARSE_EVENTS__TERM_TYPE_NUM)
3021 		return new_term(new, &temp, NULL, term->val.num);
3022 
3023 	str = strdup(term->val.str);
3024 	if (!str)
3025 		return -ENOMEM;
3026 	return new_term(new, &temp, str, 0);
3027 }
3028 
3029 void parse_events_term__delete(struct parse_events_term *term)
3030 {
3031 	if (term->array.nr_ranges)
3032 		zfree(&term->array.ranges);
3033 
3034 	if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM)
3035 		zfree(&term->val.str);
3036 
3037 	zfree(&term->config);
3038 	free(term);
3039 }
3040 
3041 int parse_events_copy_term_list(struct list_head *old,
3042 				 struct list_head **new)
3043 {
3044 	struct parse_events_term *term, *n;
3045 	int ret;
3046 
3047 	if (!old) {
3048 		*new = NULL;
3049 		return 0;
3050 	}
3051 
3052 	*new = malloc(sizeof(struct list_head));
3053 	if (!*new)
3054 		return -ENOMEM;
3055 	INIT_LIST_HEAD(*new);
3056 
3057 	list_for_each_entry (term, old, list) {
3058 		ret = parse_events_term__clone(&n, term);
3059 		if (ret)
3060 			return ret;
3061 		list_add_tail(&n->list, *new);
3062 	}
3063 	return 0;
3064 }
3065 
3066 void parse_events_terms__purge(struct list_head *terms)
3067 {
3068 	struct parse_events_term *term, *h;
3069 
3070 	list_for_each_entry_safe(term, h, terms, list) {
3071 		list_del_init(&term->list);
3072 		parse_events_term__delete(term);
3073 	}
3074 }
3075 
3076 void parse_events_terms__delete(struct list_head *terms)
3077 {
3078 	if (!terms)
3079 		return;
3080 	parse_events_terms__purge(terms);
3081 	free(terms);
3082 }
3083 
3084 void parse_events__clear_array(struct parse_events_array *a)
3085 {
3086 	zfree(&a->ranges);
3087 }
3088 
3089 void parse_events_evlist_error(struct parse_events_state *parse_state,
3090 			       int idx, const char *str)
3091 {
3092 	if (!parse_state->error)
3093 		return;
3094 
3095 	parse_events__handle_error(parse_state->error, idx, strdup(str), NULL);
3096 }
3097 
3098 static void config_terms_list(char *buf, size_t buf_sz)
3099 {
3100 	int i;
3101 	bool first = true;
3102 
3103 	buf[0] = '\0';
3104 	for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
3105 		const char *name = config_term_names[i];
3106 
3107 		if (!config_term_avail(i, NULL))
3108 			continue;
3109 		if (!name)
3110 			continue;
3111 		if (name[0] == '<')
3112 			continue;
3113 
3114 		if (strlen(buf) + strlen(name) + 2 >= buf_sz)
3115 			return;
3116 
3117 		if (!first)
3118 			strcat(buf, ",");
3119 		else
3120 			first = false;
3121 		strcat(buf, name);
3122 	}
3123 }
3124 
3125 /*
3126  * Return string contains valid config terms of an event.
3127  * @additional_terms: For terms such as PMU sysfs terms.
3128  */
3129 char *parse_events_formats_error_string(char *additional_terms)
3130 {
3131 	char *str;
3132 	/* "no-overwrite" is the longest name */
3133 	char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
3134 			  (sizeof("no-overwrite") - 1)];
3135 
3136 	config_terms_list(static_terms, sizeof(static_terms));
3137 	/* valid terms */
3138 	if (additional_terms) {
3139 		if (asprintf(&str, "valid terms: %s,%s",
3140 			     additional_terms, static_terms) < 0)
3141 			goto fail;
3142 	} else {
3143 		if (asprintf(&str, "valid terms: %s", static_terms) < 0)
3144 			goto fail;
3145 	}
3146 	return str;
3147 
3148 fail:
3149 	return NULL;
3150 }
3151