parse-events.c 64.2 KB
Newer Older
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 8 9
#include <sys/types.h>
#include <sys/stat.h>
#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 40 41
#ifdef PARSER_DEBUG
extern int parse_events_debug;
#endif
42
int parse_events_parse(void *parse_state, void *scanner);
43 44
static int get_config_terms(struct list_head *head_config,
			    struct list_head *head_terms __maybe_unused);
45

46 47 48 49 50 51 52 53 54
static struct perf_pmu_event_symbol *perf_pmu_events_list;
/*
 * The variable indicates the number of supported pmu event symbols.
 * 0 means not initialized and ready to init
 * -1 means failed to init, don't try anymore
 * >0 is the number of supported pmu event symbols
 */
static int perf_pmu_events_list_num;

55
struct event_symbol event_symbols_hw[PERF_COUNT_HW_MAX] = {
56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97
	[PERF_COUNT_HW_CPU_CYCLES] = {
		.symbol = "cpu-cycles",
		.alias  = "cycles",
	},
	[PERF_COUNT_HW_INSTRUCTIONS] = {
		.symbol = "instructions",
		.alias  = "",
	},
	[PERF_COUNT_HW_CACHE_REFERENCES] = {
		.symbol = "cache-references",
		.alias  = "",
	},
	[PERF_COUNT_HW_CACHE_MISSES] = {
		.symbol = "cache-misses",
		.alias  = "",
	},
	[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = {
		.symbol = "branch-instructions",
		.alias  = "branches",
	},
	[PERF_COUNT_HW_BRANCH_MISSES] = {
		.symbol = "branch-misses",
		.alias  = "",
	},
	[PERF_COUNT_HW_BUS_CYCLES] = {
		.symbol = "bus-cycles",
		.alias  = "",
	},
	[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = {
		.symbol = "stalled-cycles-frontend",
		.alias  = "idle-cycles-frontend",
	},
	[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = {
		.symbol = "stalled-cycles-backend",
		.alias  = "idle-cycles-backend",
	},
	[PERF_COUNT_HW_REF_CPU_CYCLES] = {
		.symbol = "ref-cycles",
		.alias  = "",
	},
};

98
struct event_symbol event_symbols_sw[PERF_COUNT_SW_MAX] = {
99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134
	[PERF_COUNT_SW_CPU_CLOCK] = {
		.symbol = "cpu-clock",
		.alias  = "",
	},
	[PERF_COUNT_SW_TASK_CLOCK] = {
		.symbol = "task-clock",
		.alias  = "",
	},
	[PERF_COUNT_SW_PAGE_FAULTS] = {
		.symbol = "page-faults",
		.alias  = "faults",
	},
	[PERF_COUNT_SW_CONTEXT_SWITCHES] = {
		.symbol = "context-switches",
		.alias  = "cs",
	},
	[PERF_COUNT_SW_CPU_MIGRATIONS] = {
		.symbol = "cpu-migrations",
		.alias  = "migrations",
	},
	[PERF_COUNT_SW_PAGE_FAULTS_MIN] = {
		.symbol = "minor-faults",
		.alias  = "",
	},
	[PERF_COUNT_SW_PAGE_FAULTS_MAJ] = {
		.symbol = "major-faults",
		.alias  = "",
	},
	[PERF_COUNT_SW_ALIGNMENT_FAULTS] = {
		.symbol = "alignment-faults",
		.alias  = "",
	},
	[PERF_COUNT_SW_EMULATION_FAULTS] = {
		.symbol = "emulation-faults",
		.alias  = "",
	},
135 136 137 138
	[PERF_COUNT_SW_DUMMY] = {
		.symbol = "dummy",
		.alias  = "",
	},
139 140 141 142
	[PERF_COUNT_SW_BPF_OUTPUT] = {
		.symbol = "bpf-output",
		.alias  = "",
	},
143 144
};

145 146
#define __PERF_EVENT_FIELD(config, name) \
	((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

153 154 155 156 157
#define for_each_subsystem(sys_dir, sys_dirent)			\
	while ((sys_dirent = readdir(sys_dir)) != NULL)		\
		if (sys_dirent->d_type == DT_DIR &&		\
		    (strcmp(sys_dirent->d_name, ".")) &&	\
		    (strcmp(sys_dirent->d_name, "..")))
158

159
static int tp_event_has_id(const char *dir_path, struct dirent *evt_dir)
160 161 162 163
{
	char evt_path[MAXPATHLEN];
	int fd;

164
	snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path, evt_dir->d_name);
165 166 167 168 169 170 171 172
	fd = open(evt_path, O_RDONLY);
	if (fd < 0)
		return -EINVAL;
	close(fd);

	return 0;
}

173
#define for_each_event(dir_path, evt_dir, evt_dirent)		\
174 175 176 177
	while ((evt_dirent = readdir(evt_dir)) != NULL)		\
		if (evt_dirent->d_type == DT_DIR &&		\
		    (strcmp(evt_dirent->d_name, ".")) &&	\
		    (strcmp(evt_dirent->d_name, "..")) &&	\
178
		    (!tp_event_has_id(dir_path, evt_dirent)))
179

L
Li Zefan 已提交
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];
E
Eric Dumazet 已提交
189
	int fd;
190 191
	u64 id;
	char evt_path[MAXPATHLEN];
E
Eric Dumazet 已提交
192
	char dir_path[MAXPATHLEN];
193

194
	sys_dir = opendir(tracing_events_path);
195
	if (!sys_dir)
E
Eric Dumazet 已提交
196
		return NULL;
197

198
	for_each_subsystem(sys_dir, sys_dirent) {
E
Eric Dumazet 已提交
199

200
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
201
			 sys_dirent->d_name);
E
Eric Dumazet 已提交
202 203
		evt_dir = opendir(dir_path);
		if (!evt_dir)
204
			continue;
E
Eric Dumazet 已提交
205

206
		for_each_event(dir_path, evt_dir, evt_dirent) {
E
Eric Dumazet 已提交
207

208 209
			scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
				  evt_dirent->d_name);
E
Eric Dumazet 已提交
210
			fd = open(evt_path, O_RDONLY);
211 212 213 214 215 216 217 218 219 220 221
			if (fd < 0)
				continue;
			if (read(fd, id_buf, sizeof(id_buf)) < 0) {
				close(fd);
				continue;
			}
			close(fd);
			id = atoll(id_buf);
			if (id == config) {
				closedir(evt_dir);
				closedir(sys_dir);
222
				path = zalloc(sizeof(*path));
223 224
				if (!path)
					return NULL;
225 226 227 228 229 230 231
				path->system = malloc(MAX_EVENT_LENGTH);
				if (!path->system) {
					free(path);
					return NULL;
				}
				path->name = malloc(MAX_EVENT_LENGTH);
				if (!path->name) {
232
					zfree(&path->system);
233 234 235
					free(path);
					return NULL;
				}
236
				strncpy(path->system, sys_dirent->d_name,
237
					MAX_EVENT_LENGTH);
238
				strncpy(path->name, evt_dirent->d_name,
239 240
					MAX_EVENT_LENGTH);
				return path;
241 242 243 244 245 246
			}
		}
		closedir(evt_dir);
	}

	closedir(sys_dir);
247 248 249
	return NULL;
}

250 251 252 253 254 255 256 257 258 259 260 261 262 263
struct tracepoint_path *tracepoint_name_to_path(const char *name)
{
	struct tracepoint_path *path = zalloc(sizeof(*path));
	char *str = strchr(name, ':');

	if (path == NULL || str == NULL) {
		free(path);
		return NULL;
	}

	path->system = strndup(name, str - name);
	path->name = strdup(str+1);

	if (path->system == NULL || path->name == NULL) {
264 265
		zfree(&path->system);
		zfree(&path->name);
266
		zfree(&path);
267 268 269 270 271
	}

	return path;
}

272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293
const char *event_type(int type)
{
	switch (type) {
	case PERF_TYPE_HARDWARE:
		return "hardware";

	case PERF_TYPE_SOFTWARE:
		return "software";

	case PERF_TYPE_TRACEPOINT:
		return "tracepoint";

	case PERF_TYPE_HW_CACHE:
		return "hardware-cache";

	default:
		break;
	}

	return "unknown";
}

294 295 296 297
static int parse_events__is_name_term(struct parse_events_term *term)
{
	return term->type_term == PARSE_EVENTS__TERM_TYPE_NAME;
}
Y
Yan, Zheng 已提交
298

299 300 301 302 303 304 305 306 307 308 309 310 311
static char *get_config_name(struct list_head *head_terms)
{
	struct parse_events_term *term;

	if (!head_terms)
		return NULL;

	list_for_each_entry(term, head_terms, list)
		if (parse_events__is_name_term(term))
			return term->val.str;

	return NULL;
}
Y
Yan, Zheng 已提交
312

313 314 315
static struct perf_evsel *
__add_event(struct list_head *list, int *idx,
	    struct perf_event_attr *attr,
316
	    char *name, struct perf_pmu *pmu,
317
	    struct list_head *config_terms, bool auto_merge_stats)
318 319
{
	struct perf_evsel *evsel;
320
	struct cpu_map *cpus = pmu ? pmu->cpus : NULL;
321 322 323

	event_attr_init(attr);

324
	evsel = perf_evsel__new_idx(attr, *idx);
325
	if (!evsel)
326
		return NULL;
327

328
	(*idx)++;
329 330
	evsel->cpus        = cpu_map__get(cpus);
	evsel->own_cpus    = cpu_map__get(cpus);
331
	evsel->system_wide = pmu ? pmu->is_uncore : false;
332
	evsel->auto_merge_stats = auto_merge_stats;
333

334 335
	if (name)
		evsel->name = strdup(name);
336 337 338 339

	if (config_terms)
		list_splice(config_terms, &evsel->config_terms);

340
	list_add_tail(&evsel->node, list);
341
	return evsel;
342 343
}

344
static int add_event(struct list_head *list, int *idx,
345 346
		     struct perf_event_attr *attr, char *name,
		     struct list_head *config_terms)
Y
Yan, Zheng 已提交
347
{
348
	return __add_event(list, idx, attr, name, NULL, config_terms, false) ? 0 : -ENOMEM;
Y
Yan, Zheng 已提交
349 350
}

351
static int parse_aliases(char *str, const char *names[][PERF_EVSEL__MAX_ALIASES], int size)
352 353
{
	int i, j;
354
	int n, longest = -1;
355 356

	for (i = 0; i < size; i++) {
357
		for (j = 0; j < PERF_EVSEL__MAX_ALIASES && names[i][j]; j++) {
358
			n = strlen(names[i][j]);
359
			if (n > longest && !strncasecmp(str, names[i][j], n))
360 361
				longest = n;
		}
362
		if (longest > 0)
363
			return i;
364 365
	}

366
	return -1;
367 368
}

369 370 371 372 373 374 375 376 377 378 379
typedef int config_term_func_t(struct perf_event_attr *attr,
			       struct parse_events_term *term,
			       struct parse_events_error *err);
static int config_term_common(struct perf_event_attr *attr,
			      struct parse_events_term *term,
			      struct parse_events_error *err);
static int config_attr(struct perf_event_attr *attr,
		       struct list_head *head,
		       struct parse_events_error *err,
		       config_term_func_t config_term);

380
int parse_events_add_cache(struct list_head *list, int *idx,
381
			   char *type, char *op_result1, char *op_result2,
382
			   struct parse_events_error *err,
383
			   struct list_head *head_config)
384
{
385
	struct perf_event_attr attr;
386 387
	LIST_HEAD(config_terms);
	char name[MAX_NAME_LEN], *config_name;
388
	int cache_type = -1, cache_op = -1, cache_result = -1;
389 390
	char *op_result[2] = { op_result1, op_result2 };
	int i, n;
391 392 393 394 395

	/*
	 * No fallback - if we cannot get a clear cache type
	 * then bail out:
	 */
396
	cache_type = parse_aliases(type, perf_evsel__hw_cache,
397
				   PERF_COUNT_HW_CACHE_MAX);
398
	if (cache_type == -1)
399 400
		return -EINVAL;

401
	config_name = get_config_name(head_config);
402
	n = snprintf(name, MAX_NAME_LEN, "%s", type);
403

404 405 406
	for (i = 0; (i < 2) && (op_result[i]); i++) {
		char *str = op_result[i];

407
		n += snprintf(name + n, MAX_NAME_LEN - n, "-%s", str);
408 409

		if (cache_op == -1) {
410
			cache_op = parse_aliases(str, perf_evsel__hw_cache_op,
411
						 PERF_COUNT_HW_CACHE_OP_MAX);
412
			if (cache_op >= 0) {
413
				if (!perf_evsel__is_cache_op_valid(cache_type, cache_op))
414
					return -EINVAL;
415 416 417 418 419
				continue;
			}
		}

		if (cache_result == -1) {
420 421
			cache_result = parse_aliases(str, perf_evsel__hw_cache_result,
						     PERF_COUNT_HW_CACHE_RESULT_MAX);
422 423 424 425
			if (cache_result >= 0)
				continue;
		}
	}
426 427 428 429

	/*
	 * Fall back to reads:
	 */
430 431
	if (cache_op == -1)
		cache_op = PERF_COUNT_HW_CACHE_OP_READ;
432 433 434 435 436 437 438

	/*
	 * Fall back to accesses:
	 */
	if (cache_result == -1)
		cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;

439 440 441
	memset(&attr, 0, sizeof(attr));
	attr.config = cache_type | (cache_op << 8) | (cache_result << 16);
	attr.type = PERF_TYPE_HW_CACHE;
442 443

	if (head_config) {
444
		if (config_attr(&attr, head_config, err,
445 446 447 448 449 450 451
				config_term_common))
			return -EINVAL;

		if (get_config_terms(head_config, &config_terms))
			return -ENOMEM;
	}
	return add_event(list, idx, &attr, config_name ? : name, &config_terms);
452 453
}

454
static void tracepoint_error(struct parse_events_error *e, int err,
455
			     const char *sys, const char *name)
456 457 458
{
	char help[BUFSIZ];

459 460 461
	if (!e)
		return;

462 463 464 465 466 467 468 469
	/*
	 * We get error directly from syscall errno ( > 0),
	 * or from encoded pointer's error ( < 0).
	 */
	err = abs(err);

	switch (err) {
	case EACCES:
470
		e->str = strdup("can't access trace events");
471 472
		break;
	case ENOENT:
473
		e->str = strdup("unknown tracepoint");
474 475
		break;
	default:
476
		e->str = strdup("failed to add tracepoint");
477 478 479 480
		break;
	}

	tracing_path__strerror_open_tp(err, help, sizeof(help), sys, name);
481
	e->help = strdup(help);
482 483
}

484
static int add_tracepoint(struct list_head *list, int *idx,
485
			  const char *sys_name, const char *evt_name,
486
			  struct parse_events_error *err,
487
			  struct list_head *head_config)
488
{
489
	struct perf_evsel *evsel;
490

491
	evsel = perf_evsel__newtp_idx(sys_name, evt_name, (*idx)++);
492
	if (IS_ERR(evsel)) {
493
		tracepoint_error(err, PTR_ERR(evsel), sys_name, evt_name);
494
		return PTR_ERR(evsel);
495
	}
496

497 498 499 500 501 502 503 504
	if (head_config) {
		LIST_HEAD(config_terms);

		if (get_config_terms(head_config, &config_terms))
			return -ENOMEM;
		list_splice(&config_terms, &evsel->config_terms);
	}

505 506
	list_add_tail(&evsel->node, list);
	return 0;
507 508
}

509
static int add_tracepoint_multi_event(struct list_head *list, int *idx,
510
				      const char *sys_name, const char *evt_name,
511
				      struct parse_events_error *err,
512
				      struct list_head *head_config)
513 514 515 516
{
	char evt_path[MAXPATHLEN];
	struct dirent *evt_ent;
	DIR *evt_dir;
517
	int ret = 0, found = 0;
518

519
	snprintf(evt_path, MAXPATHLEN, "%s/%s", tracing_events_path, sys_name);
520 521
	evt_dir = opendir(evt_path);
	if (!evt_dir) {
522
		tracepoint_error(err, errno, sys_name, evt_name);
523
		return -1;
524 525
	}

526
	while (!ret && (evt_ent = readdir(evt_dir))) {
527 528 529 530 531 532
		if (!strcmp(evt_ent->d_name, ".")
		    || !strcmp(evt_ent->d_name, "..")
		    || !strcmp(evt_ent->d_name, "enable")
		    || !strcmp(evt_ent->d_name, "filter"))
			continue;

533
		if (!strglobmatch(evt_ent->d_name, evt_name))
534 535
			continue;

536 537
		found++;

538
		ret = add_tracepoint(list, idx, sys_name, evt_ent->d_name,
539
				     err, head_config);
540 541
	}

542 543 544 545 546
	if (!found) {
		tracepoint_error(err, ENOENT, sys_name, evt_name);
		ret = -1;
	}

547
	closedir(evt_dir);
548
	return ret;
549 550
}

551
static int add_tracepoint_event(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
{
	return strpbrk(evt_name, "*?") ?
557
	       add_tracepoint_multi_event(list, idx, sys_name, evt_name,
558
					  err, head_config) :
559
	       add_tracepoint(list, idx, sys_name, evt_name,
560
			      err, head_config);
561 562
}

563
static int add_tracepoint_multi_sys(struct list_head *list, int *idx,
564
				    const char *sys_name, const char *evt_name,
565
				    struct parse_events_error *err,
566
				    struct list_head *head_config)
567 568 569 570 571 572 573
{
	struct dirent *events_ent;
	DIR *events_dir;
	int ret = 0;

	events_dir = opendir(tracing_events_path);
	if (!events_dir) {
574
		tracepoint_error(err, errno, sys_name, evt_name);
575 576 577 578 579 580 581 582 583 584 585 586 587 588 589
		return -1;
	}

	while (!ret && (events_ent = readdir(events_dir))) {
		if (!strcmp(events_ent->d_name, ".")
		    || !strcmp(events_ent->d_name, "..")
		    || !strcmp(events_ent->d_name, "enable")
		    || !strcmp(events_ent->d_name, "header_event")
		    || !strcmp(events_ent->d_name, "header_page"))
			continue;

		if (!strglobmatch(events_ent->d_name, sys_name))
			continue;

		ret = add_tracepoint_event(list, idx, events_ent->d_name,
590
					   evt_name, err, head_config);
591 592 593 594 595 596
	}

	closedir(events_dir);
	return ret;
}

597
struct __add_bpf_event_param {
598
	struct parse_events_state *parse_state;
599
	struct list_head *list;
600
	struct list_head *head_config;
601 602
};

603
static int add_bpf_event(const char *group, const char *event, int fd,
604 605 606 607
			 void *_param)
{
	LIST_HEAD(new_evsels);
	struct __add_bpf_event_param *param = _param;
608
	struct parse_events_state *parse_state = param->parse_state;
609
	struct list_head *list = param->list;
610
	struct perf_evsel *pos;
611 612 613
	int err;

	pr_debug("add bpf event %s:%s and attach bpf program %d\n",
614
		 group, event, fd);
615

616 617
	err = parse_events_add_tracepoint(&new_evsels, &parse_state->idx, group,
					  event, parse_state->error,
618
					  param->head_config);
619 620 621 622
	if (err) {
		struct perf_evsel *evsel, *tmp;

		pr_debug("Failed to add BPF event %s:%s\n",
623
			 group, event);
624 625 626 627 628 629
		list_for_each_entry_safe(evsel, tmp, &new_evsels, node) {
			list_del(&evsel->node);
			perf_evsel__delete(evsel);
		}
		return err;
	}
630
	pr_debug("adding %s:%s\n", group, event);
631

632 633
	list_for_each_entry(pos, &new_evsels, node) {
		pr_debug("adding %s:%s to %p\n",
634
			 group, event, pos);
635 636
		pos->bpf_fd = fd;
	}
637 638 639 640
	list_splice(&new_evsels, list);
	return 0;
}

641
int parse_events_load_bpf_obj(struct parse_events_state *parse_state,
642
			      struct list_head *list,
643 644
			      struct bpf_object *obj,
			      struct list_head *head_config)
645 646 647
{
	int err;
	char errbuf[BUFSIZ];
648
	struct __add_bpf_event_param param = {parse_state, list, head_config};
649
	static bool registered_unprobe_atexit = false;
650 651 652 653 654 655 656 657

	if (IS_ERR(obj) || !obj) {
		snprintf(errbuf, sizeof(errbuf),
			 "Internal error: load bpf obj with NULL");
		err = -EINVAL;
		goto errout;
	}

658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673
	/*
	 * Register atexit handler before calling bpf__probe() so
	 * bpf__probe() don't need to unprobe probe points its already
	 * created when failure.
	 */
	if (!registered_unprobe_atexit) {
		atexit(bpf__clear);
		registered_unprobe_atexit = true;
	}

	err = bpf__probe(obj);
	if (err) {
		bpf__strerror_probe(obj, err, errbuf, sizeof(errbuf));
		goto errout;
	}

674 675 676 677 678 679
	err = bpf__load(obj);
	if (err) {
		bpf__strerror_load(obj, err, errbuf, sizeof(errbuf));
		goto errout;
	}

680
	err = bpf__foreach_event(obj, add_bpf_event, &param);
681 682 683 684 685 686 687
	if (err) {
		snprintf(errbuf, sizeof(errbuf),
			 "Attach events in BPF object failed");
		goto errout;
	}

	return 0;
688
errout:
689 690
	parse_state->error->help = strdup("(add -v to see detail)");
	parse_state->error->str = strdup(errbuf);
691 692 693
	return err;
}

694
static int
695
parse_events_config_bpf(struct parse_events_state *parse_state,
696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713
			struct bpf_object *obj,
			struct list_head *head_config)
{
	struct parse_events_term *term;
	int error_pos;

	if (!head_config || list_empty(head_config))
		return 0;

	list_for_each_entry(term, head_config, list) {
		char errbuf[BUFSIZ];
		int err;

		if (term->type_term != PARSE_EVENTS__TERM_TYPE_USER) {
			snprintf(errbuf, sizeof(errbuf),
				 "Invalid config term for BPF object");
			errbuf[BUFSIZ - 1] = '\0';

714 715
			parse_state->error->idx = term->err_term;
			parse_state->error->str = strdup(errbuf);
716 717 718
			return -EINVAL;
		}

719
		err = bpf__config_obj(obj, term, parse_state->evlist, &error_pos);
720
		if (err) {
721
			bpf__strerror_config_obj(obj, term, parse_state->evlist,
722 723
						 &error_pos, err, errbuf,
						 sizeof(errbuf));
724
			parse_state->error->help = strdup(
725
"Hint:\tValid config terms:\n"
726 727
"     \tmap:[<arraymap>].value<indices>=[value]\n"
"     \tmap:[<eventmap>].event<indices>=[event]\n"
728
"\n"
729
"     \twhere <indices> is something like [0,3...5] or [all]\n"
730
"     \t(add -v to see detail)");
731
			parse_state->error->str = strdup(errbuf);
732
			if (err == -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE)
733
				parse_state->error->idx = term->err_val;
734
			else
735
				parse_state->error->idx = term->err_term + error_pos;
736 737 738 739 740 741
			return err;
		}
	}
	return 0;
}

742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770
/*
 * Split config terms:
 * perf record -e bpf.c/call-graph=fp,map:array.value[0]=1/ ...
 *  'call-graph=fp' is 'evt config', should be applied to each
 *  events in bpf.c.
 * 'map:array.value[0]=1' is 'obj config', should be processed
 * with parse_events_config_bpf.
 *
 * Move object config terms from the first list to obj_head_config.
 */
static void
split_bpf_config_terms(struct list_head *evt_head_config,
		       struct list_head *obj_head_config)
{
	struct parse_events_term *term, *temp;

	/*
	 * Currectly, all possible user config term
	 * belong to bpf object. parse_events__is_hardcoded_term()
	 * happends to be a good flag.
	 *
	 * See parse_events_config_bpf() and
	 * config_term_tracepoint().
	 */
	list_for_each_entry_safe(term, temp, evt_head_config, list)
		if (!parse_events__is_hardcoded_term(term))
			list_move_tail(&term->list, obj_head_config);
}

771
int parse_events_load_bpf(struct parse_events_state *parse_state,
772
			  struct list_head *list,
773
			  char *bpf_file_name,
774 775
			  bool source,
			  struct list_head *head_config)
776
{
777
	int err;
778 779 780 781 782
	struct bpf_object *obj;
	LIST_HEAD(obj_head_config);

	if (head_config)
		split_bpf_config_terms(head_config, &obj_head_config);
783

784
	obj = bpf__prepare_load(bpf_file_name, source);
785
	if (IS_ERR(obj)) {
786 787
		char errbuf[BUFSIZ];

788
		err = PTR_ERR(obj);
789 790 791 792 793

		if (err == -ENOTSUP)
			snprintf(errbuf, sizeof(errbuf),
				 "BPF support is not compiled");
		else
794 795 796 797
			bpf__strerror_prepare_load(bpf_file_name,
						   source,
						   -err, errbuf,
						   sizeof(errbuf));
798

799 800
		parse_state->error->help = strdup("(add -v to see detail)");
		parse_state->error->str = strdup(errbuf);
801 802 803
		return err;
	}

804
	err = parse_events_load_bpf_obj(parse_state, list, obj, head_config);
805 806
	if (err)
		return err;
807
	err = parse_events_config_bpf(parse_state, obj, &obj_head_config);
808 809 810 811 812 813 814 815

	/*
	 * Caller doesn't know anything about obj_head_config,
	 * so combine them together again before returnning.
	 */
	if (head_config)
		list_splice_tail(&obj_head_config, head_config);
	return err;
816 817
}

818 819
static int
parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
820 821 822 823
{
	int i;

	for (i = 0; i < 3; i++) {
824
		if (!type || !type[i])
825 826
			break;

827 828 829 830 831 832 833 834
#define CHECK_SET_TYPE(bit)		\
do {					\
	if (attr->bp_type & bit)	\
		return -EINVAL;		\
	else				\
		attr->bp_type |= bit;	\
} while (0)

835 836
		switch (type[i]) {
		case 'r':
837
			CHECK_SET_TYPE(HW_BREAKPOINT_R);
838 839
			break;
		case 'w':
840
			CHECK_SET_TYPE(HW_BREAKPOINT_W);
841 842
			break;
		case 'x':
843
			CHECK_SET_TYPE(HW_BREAKPOINT_X);
844 845
			break;
		default:
846
			return -EINVAL;
847 848
		}
	}
849

850 851
#undef CHECK_SET_TYPE

852 853 854
	if (!attr->bp_type) /* Default */
		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;

855
	return 0;
856 857
}

858
int parse_events_add_breakpoint(struct list_head *list, int *idx,
859
				void *ptr, char *type, u64 len)
860
{
861
	struct perf_event_attr attr;
862

863
	memset(&attr, 0, sizeof(attr));
864
	attr.bp_addr = (unsigned long) ptr;
865

866 867
	if (parse_breakpoint_type(type, &attr))
		return -EINVAL;
868

869 870 871 872 873 874 875 876 877
	/* Provide some defaults if len is not specified */
	if (!len) {
		if (attr.bp_type == HW_BREAKPOINT_X)
			len = sizeof(long);
		else
			len = HW_BREAKPOINT_LEN_4;
	}

	attr.bp_len = len;
878

879
	attr.type = PERF_TYPE_BREAKPOINT;
880
	attr.sample_period = 1;
881

882
	return add_event(list, idx, &attr, NULL, NULL);
883 884
}

885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901
static int check_type_val(struct parse_events_term *term,
			  struct parse_events_error *err,
			  int type)
{
	if (type == term->type_val)
		return 0;

	if (err) {
		err->idx = term->err_val;
		if (type == PARSE_EVENTS__TERM_TYPE_NUM)
			err->str = strdup("expected numeric value");
		else
			err->str = strdup("expected string value");
	}
	return -EINVAL;
}

902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918
/*
 * Update according to parse-events.l
 */
static const char *config_term_names[__PARSE_EVENTS__TERM_TYPE_NR] = {
	[PARSE_EVENTS__TERM_TYPE_USER]			= "<sysfs term>",
	[PARSE_EVENTS__TERM_TYPE_CONFIG]		= "config",
	[PARSE_EVENTS__TERM_TYPE_CONFIG1]		= "config1",
	[PARSE_EVENTS__TERM_TYPE_CONFIG2]		= "config2",
	[PARSE_EVENTS__TERM_TYPE_NAME]			= "name",
	[PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD]		= "period",
	[PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ]		= "freq",
	[PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE]	= "branch_type",
	[PARSE_EVENTS__TERM_TYPE_TIME]			= "time",
	[PARSE_EVENTS__TERM_TYPE_CALLGRAPH]		= "call-graph",
	[PARSE_EVENTS__TERM_TYPE_STACKSIZE]		= "stack-size",
	[PARSE_EVENTS__TERM_TYPE_NOINHERIT]		= "no-inherit",
	[PARSE_EVENTS__TERM_TYPE_INHERIT]		= "inherit",
919
	[PARSE_EVENTS__TERM_TYPE_MAX_STACK]		= "max-stack",
W
Wang Nan 已提交
920 921
	[PARSE_EVENTS__TERM_TYPE_OVERWRITE]		= "overwrite",
	[PARSE_EVENTS__TERM_TYPE_NOOVERWRITE]		= "no-overwrite",
922
	[PARSE_EVENTS__TERM_TYPE_DRV_CFG]		= "driver-config",
923 924
};

925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941
static bool config_term_shrinked;

static bool
config_term_avail(int term_type, struct parse_events_error *err)
{
	if (term_type < 0 || term_type >= __PARSE_EVENTS__TERM_TYPE_NR) {
		err->str = strdup("Invalid term_type");
		return false;
	}
	if (!config_term_shrinked)
		return true;

	switch (term_type) {
	case PARSE_EVENTS__TERM_TYPE_CONFIG:
	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
	case PARSE_EVENTS__TERM_TYPE_NAME:
942
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960
		return true;
	default:
		if (!err)
			return false;

		/* term_type is validated so indexing is safe */
		if (asprintf(&err->str, "'%s' is not usable in 'perf stat'",
			     config_term_names[term_type]) < 0)
			err->str = NULL;
		return false;
	}
}

void parse_events__shrink_config_terms(void)
{
	config_term_shrinked = true;
}

961 962 963
static int config_term_common(struct perf_event_attr *attr,
			      struct parse_events_term *term,
			      struct parse_events_error *err)
964
{
965 966 967 968
#define CHECK_TYPE_VAL(type)						   \
do {									   \
	if (check_type_val(term, err, PARSE_EVENTS__TERM_TYPE_ ## type)) \
		return -EINVAL;						   \
969 970 971
} while (0)

	switch (term->type_term) {
972
	case PARSE_EVENTS__TERM_TYPE_CONFIG:
973
		CHECK_TYPE_VAL(NUM);
974 975 976
		attr->config = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG1:
977
		CHECK_TYPE_VAL(NUM);
978 979 980
		attr->config1 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
981
		CHECK_TYPE_VAL(NUM);
982 983 984
		attr->config2 = term->val.num;
		break;
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
985
		CHECK_TYPE_VAL(NUM);
986
		break;
987 988 989
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
		CHECK_TYPE_VAL(NUM);
		break;
990
	case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
991 992 993 994 995 996 997
		CHECK_TYPE_VAL(STR);
		if (strcmp(term->val.str, "no") &&
		    parse_branch_str(term->val.str, &attr->branch_sample_type)) {
			err->str = strdup("invalid branch sample type");
			err->idx = term->err_val;
			return -EINVAL;
		}
998
		break;
K
Kan Liang 已提交
999 1000 1001 1002 1003 1004 1005 1006
	case PARSE_EVENTS__TERM_TYPE_TIME:
		CHECK_TYPE_VAL(NUM);
		if (term->val.num > 1) {
			err->str = strdup("expected 0 or 1");
			err->idx = term->err_val;
			return -EINVAL;
		}
		break;
1007 1008 1009 1010 1011 1012
	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
		CHECK_TYPE_VAL(STR);
		break;
	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
		CHECK_TYPE_VAL(NUM);
		break;
1013 1014 1015 1016 1017 1018
	case PARSE_EVENTS__TERM_TYPE_INHERIT:
		CHECK_TYPE_VAL(NUM);
		break;
	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
		CHECK_TYPE_VAL(NUM);
		break;
W
Wang Nan 已提交
1019 1020 1021 1022 1023 1024
	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
		CHECK_TYPE_VAL(NUM);
		break;
	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
		CHECK_TYPE_VAL(NUM);
		break;
1025 1026 1027
	case PARSE_EVENTS__TERM_TYPE_NAME:
		CHECK_TYPE_VAL(STR);
		break;
1028 1029 1030
	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
		CHECK_TYPE_VAL(NUM);
		break;
1031
	default:
1032 1033 1034
		err->str = strdup("unknown term");
		err->idx = term->err_term;
		err->help = parse_events_formats_error_string(NULL);
1035 1036
		return -EINVAL;
	}
1037

1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048
	/*
	 * Check term availbility after basic checking so
	 * PARSE_EVENTS__TERM_TYPE_USER can be found and filtered.
	 *
	 * If check availbility at the entry of this function,
	 * user will see "'<sysfs term>' is not usable in 'perf stat'"
	 * if an invalid config term is provided for legacy events
	 * (for example, instructions/badterm/...), which is confusing.
	 */
	if (!config_term_avail(term->type_term, err))
		return -EINVAL;
1049
	return 0;
1050
#undef CHECK_TYPE_VAL
1051 1052
}

1053 1054 1055 1056
static int config_term_pmu(struct perf_event_attr *attr,
			   struct parse_events_term *term,
			   struct parse_events_error *err)
{
1057 1058
	if (term->type_term == PARSE_EVENTS__TERM_TYPE_USER ||
	    term->type_term == PARSE_EVENTS__TERM_TYPE_DRV_CFG)
1059 1060 1061 1062 1063 1064 1065 1066 1067
		/*
		 * Always succeed for sysfs terms, as we dont know
		 * at this point what type they need to have.
		 */
		return 0;
	else
		return config_term_common(attr, term, err);
}

1068 1069 1070 1071 1072 1073 1074
static int config_term_tracepoint(struct perf_event_attr *attr,
				  struct parse_events_term *term,
				  struct parse_events_error *err)
{
	switch (term->type_term) {
	case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
	case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
1075 1076
	case PARSE_EVENTS__TERM_TYPE_INHERIT:
	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
1077
	case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
W
Wang Nan 已提交
1078 1079
	case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
	case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092
		return config_term_common(attr, term, err);
	default:
		if (err) {
			err->idx = term->err_term;
			err->str = strdup("unknown term");
			err->help = strdup("valid terms: call-graph,stack-size\n");
		}
		return -EINVAL;
	}

	return 0;
}

1093
static int config_attr(struct perf_event_attr *attr,
1094
		       struct list_head *head,
1095 1096
		       struct parse_events_error *err,
		       config_term_func_t config_term)
1097
{
1098
	struct parse_events_term *term;
1099 1100

	list_for_each_entry(term, head, list)
1101
		if (config_term(attr, term, err))
1102 1103 1104 1105 1106
			return -EINVAL;

	return 0;
}

1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
static int get_config_terms(struct list_head *head_config,
			    struct list_head *head_terms __maybe_unused)
{
#define ADD_CONFIG_TERM(__type, __name, __val)			\
do {								\
	struct perf_evsel_config_term *__t;			\
								\
	__t = zalloc(sizeof(*__t));				\
	if (!__t)						\
		return -ENOMEM;					\
								\
	INIT_LIST_HEAD(&__t->list);				\
	__t->type       = PERF_EVSEL__CONFIG_TERM_ ## __type;	\
	__t->val.__name = __val;				\
1121
	__t->weak	= term->weak;				\
1122 1123 1124 1125 1126 1127 1128
	list_add_tail(&__t->list, head_terms);			\
} while (0)

	struct parse_events_term *term;

	list_for_each_entry(term, head_config, list) {
		switch (term->type_term) {
1129 1130
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
			ADD_CONFIG_TERM(PERIOD, period, term->val.num);
K
Kan Liang 已提交
1131
			break;
1132 1133 1134
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
			ADD_CONFIG_TERM(FREQ, freq, term->val.num);
			break;
K
Kan Liang 已提交
1135 1136 1137
		case PARSE_EVENTS__TERM_TYPE_TIME:
			ADD_CONFIG_TERM(TIME, time, term->val.num);
			break;
1138 1139 1140
		case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
			ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
			break;
1141 1142 1143
		case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
			ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
			break;
1144 1145 1146
		case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
			ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
			break;
1147 1148 1149 1150 1151 1152
		case PARSE_EVENTS__TERM_TYPE_INHERIT:
			ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
			break;
		case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
			ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
			break;
1153 1154 1155
		case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
			ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
			break;
W
Wang Nan 已提交
1156 1157 1158 1159 1160 1161
		case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
			ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
			break;
		case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
			ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
			break;
1162 1163 1164
		case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
			ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
			break;
1165 1166 1167 1168 1169 1170 1171 1172
		default:
			break;
		}
	}
#undef ADD_EVSEL_CONFIG
	return 0;
}

1173
int parse_events_add_tracepoint(struct list_head *list, int *idx,
1174
				const char *sys, const char *event,
1175
				struct parse_events_error *err,
1176 1177 1178 1179 1180
				struct list_head *head_config)
{
	if (head_config) {
		struct perf_event_attr attr;

1181
		if (config_attr(&attr, head_config, err,
1182 1183 1184 1185 1186 1187
				config_term_tracepoint))
			return -EINVAL;
	}

	if (strpbrk(sys, "*?"))
		return add_tracepoint_multi_sys(list, idx, sys, event,
1188
						err, head_config);
1189 1190
	else
		return add_tracepoint_event(list, idx, sys, event,
1191
					    err, head_config);
1192 1193
}

1194
int parse_events_add_numeric(struct parse_events_state *parse_state,
1195
			     struct list_head *list,
1196
			     u32 type, u64 config,
1197
			     struct list_head *head_config)
1198
{
1199
	struct perf_event_attr attr;
1200
	LIST_HEAD(config_terms);
1201

1202 1203 1204
	memset(&attr, 0, sizeof(attr));
	attr.type = type;
	attr.config = config;
1205

1206
	if (head_config) {
1207
		if (config_attr(&attr, head_config, parse_state->error,
1208
				config_term_common))
1209 1210 1211 1212 1213
			return -EINVAL;

		if (get_config_terms(head_config, &config_terms))
			return -ENOMEM;
	}
1214

1215
	return add_event(list, &parse_state->idx, &attr,
1216
			 get_config_name(head_config), &config_terms);
1217
}
1218

1219
int parse_events_add_pmu(struct parse_events_state *parse_state,
1220
			 struct list_head *list, char *name,
1221 1222 1223
			 struct list_head *head_config,
			 bool auto_merge_stats,
			 bool use_alias)
1224 1225
{
	struct perf_event_attr attr;
1226
	struct perf_pmu_info info;
1227
	struct perf_pmu *pmu;
1228
	struct perf_evsel *evsel;
1229
	struct parse_events_error *err = parse_state->error;
1230
	bool use_uncore_alias;
1231
	LIST_HEAD(config_terms);
1232 1233

	pmu = perf_pmu__find(name);
1234 1235 1236 1237 1238
	if (!pmu) {
		if (asprintf(&err->str,
				"Cannot find PMU `%s'. Missing kernel support?",
				name) < 0)
			err->str = NULL;
1239
		return -EINVAL;
1240
	}
1241

1242 1243 1244 1245 1246 1247
	if (pmu->default_config) {
		memcpy(&attr, pmu->default_config,
		       sizeof(struct perf_event_attr));
	} else {
		memset(&attr, 0, sizeof(attr));
	}
1248

1249 1250
	use_uncore_alias = (pmu->is_uncore && use_alias);

1251 1252
	if (!head_config) {
		attr.type = pmu->type;
1253
		evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats);
1254 1255
		if (evsel) {
			evsel->pmu_name = name;
1256
			evsel->use_uncore_alias = use_uncore_alias;
1257 1258 1259 1260
			return 0;
		} else {
			return -ENOMEM;
		}
1261 1262
	}

1263
	if (perf_pmu__check_alias(pmu, head_config, &info))
1264 1265
		return -EINVAL;

1266 1267 1268 1269
	/*
	 * Configure hardcoded terms first, no need to check
	 * return value when called with fail == 0 ;)
	 */
1270
	if (config_attr(&attr, head_config, parse_state->error, config_term_pmu))
1271
		return -EINVAL;
1272

1273 1274 1275
	if (get_config_terms(head_config, &config_terms))
		return -ENOMEM;

1276
	if (perf_pmu__config(pmu, &attr, head_config, parse_state->error))
1277 1278
		return -EINVAL;

1279
	evsel = __add_event(list, &parse_state->idx, &attr,
1280
			    get_config_name(head_config), pmu,
1281
			    &config_terms, auto_merge_stats);
1282
	if (evsel) {
1283 1284
		evsel->unit = info.unit;
		evsel->scale = info.scale;
1285
		evsel->per_pkg = info.per_pkg;
1286
		evsel->snapshot = info.snapshot;
1287
		evsel->metric_expr = info.metric_expr;
1288
		evsel->metric_name = info.metric_name;
1289
		evsel->pmu_name = name;
1290
		evsel->use_uncore_alias = use_uncore_alias;
1291 1292 1293
	}

	return evsel ? 0 : -ENOMEM;
1294 1295
}

1296
int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324
			       char *str, struct list_head **listp)
{
	struct list_head *head;
	struct parse_events_term *term;
	struct list_head *list;
	struct perf_pmu *pmu = NULL;
	int ok = 0;

	*listp = NULL;
	/* Add it for all PMUs that support the alias */
	list = malloc(sizeof(struct list_head));
	if (!list)
		return -1;
	INIT_LIST_HEAD(list);
	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
		struct perf_pmu_alias *alias;

		list_for_each_entry(alias, &pmu->aliases, list) {
			if (!strcasecmp(alias->name, str)) {
				head = malloc(sizeof(struct list_head));
				if (!head)
					return -1;
				INIT_LIST_HEAD(head);
				if (parse_events_term__num(&term, PARSE_EVENTS__TERM_TYPE_USER,
							   str, 1, false, &str, NULL) < 0)
					return -1;
				list_add_tail(&term->list, head);

1325
				if (!parse_events_add_pmu(parse_state, list,
1326 1327
							  pmu->name, head,
							  true, true)) {
1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342
					pr_debug("%s -> %s/%s/\n", str,
						 pmu->name, alias->str);
					ok++;
				}

				parse_events_terms__delete(head);
			}
		}
	}
	if (!ok)
		return -1;
	*listp = list;
	return 0;
}

1343 1344
int parse_events__modifier_group(struct list_head *list,
				 char *event_mod)
1345
{
1346 1347 1348
	return parse_events__modifier_event(list, event_mod, true);
}

1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462
/*
 * Check if the two uncore PMUs are from the same uncore block
 * The format of the uncore PMU name is uncore_#blockname_#pmuidx
 */
static bool is_same_uncore_block(const char *pmu_name_a, const char *pmu_name_b)
{
	char *end_a, *end_b;

	end_a = strrchr(pmu_name_a, '_');
	end_b = strrchr(pmu_name_b, '_');

	if (!end_a || !end_b)
		return false;

	if ((end_a - pmu_name_a) != (end_b - pmu_name_b))
		return false;

	return (strncmp(pmu_name_a, pmu_name_b, end_a - pmu_name_a) == 0);
}

static int
parse_events__set_leader_for_uncore_aliase(char *name, struct list_head *list,
					   struct parse_events_state *parse_state)
{
	struct perf_evsel *evsel, *leader;
	uintptr_t *leaders;
	bool is_leader = true;
	int i, nr_pmu = 0, total_members, ret = 0;

	leader = list_first_entry(list, struct perf_evsel, node);
	evsel = list_last_entry(list, struct perf_evsel, node);
	total_members = evsel->idx - leader->idx + 1;

	leaders = calloc(total_members, sizeof(uintptr_t));
	if (WARN_ON(!leaders))
		return 0;

	/*
	 * Going through the whole group and doing sanity check.
	 * All members must use alias, and be from the same uncore block.
	 * Also, storing the leader events in an array.
	 */
	__evlist__for_each_entry(list, evsel) {

		/* Only split the uncore group which members use alias */
		if (!evsel->use_uncore_alias)
			goto out;

		/* The events must be from the same uncore block */
		if (!is_same_uncore_block(leader->pmu_name, evsel->pmu_name))
			goto out;

		if (!is_leader)
			continue;
		/*
		 * If the event's PMU name starts to repeat, it must be a new
		 * event. That can be used to distinguish the leader from
		 * other members, even they have the same event name.
		 */
		if ((leader != evsel) && (leader->pmu_name == evsel->pmu_name)) {
			is_leader = false;
			continue;
		}
		/* The name is always alias name */
		WARN_ON(strcmp(leader->name, evsel->name));

		/* Store the leader event for each PMU */
		leaders[nr_pmu++] = (uintptr_t) evsel;
	}

	/* only one event alias */
	if (nr_pmu == total_members) {
		parse_state->nr_groups--;
		goto handled;
	}

	/*
	 * An uncore event alias is a joint name which means the same event
	 * runs on all PMUs of a block.
	 * Perf doesn't support mixed events from different PMUs in the same
	 * group. The big group has to be split into multiple small groups
	 * which only include the events from the same PMU.
	 *
	 * Here the uncore event aliases must be from the same uncore block.
	 * The number of PMUs must be same for each alias. The number of new
	 * small groups equals to the number of PMUs.
	 * Setting the leader event for corresponding members in each group.
	 */
	i = 0;
	__evlist__for_each_entry(list, evsel) {
		if (i >= nr_pmu)
			i = 0;
		evsel->leader = (struct perf_evsel *) leaders[i++];
	}

	/* The number of members and group name are same for each group */
	for (i = 0; i < nr_pmu; i++) {
		evsel = (struct perf_evsel *) leaders[i];
		evsel->nr_members = total_members / nr_pmu;
		evsel->group_name = name ? strdup(name) : NULL;
	}

	/* Take the new small groups into account */
	parse_state->nr_groups += nr_pmu - 1;

handled:
	ret = 1;
out:
	free(leaders);
	return ret;
}

void parse_events__set_leader(char *name, struct list_head *list,
			      struct parse_events_state *parse_state)
1463 1464 1465
{
	struct perf_evsel *leader;

1466 1467 1468 1469 1470
	if (list_empty(list)) {
		WARN_ONCE(true, "WARNING: failed to set leader: empty list");
		return;
	}

1471 1472 1473
	if (parse_events__set_leader_for_uncore_aliase(name, list, parse_state))
		return;

1474 1475
	__perf_evlist__set_leader(list);
	leader = list_entry(list->next, struct perf_evsel, node);
1476
	leader->group_name = name ? strdup(name) : NULL;
1477 1478
}

1479
/* list_event is assumed to point to malloc'ed memory */
1480 1481 1482 1483 1484
void parse_events_update_lists(struct list_head *list_event,
			       struct list_head *list_all)
{
	/*
	 * Called for single event definition. Update the
1485
	 * 'all event' list, and reinit the 'single event'
1486 1487 1488
	 * list, for next event definition.
	 */
	list_splice_tail(list_event, list_all);
1489
	free(list_event);
1490 1491
}

1492 1493 1494 1495 1496 1497
struct event_modifier {
	int eu;
	int ek;
	int eh;
	int eH;
	int eG;
1498
	int eI;
1499
	int precise;
1500
	int precise_max;
1501
	int exclude_GH;
1502
	int sample_read;
1503
	int pinned;
1504
	int weak;
1505 1506 1507 1508
};

static int get_event_modifier(struct event_modifier *mod, char *str,
			       struct perf_evsel *evsel)
1509
{
1510 1511 1512 1513 1514
	int eu = evsel ? evsel->attr.exclude_user : 0;
	int ek = evsel ? evsel->attr.exclude_kernel : 0;
	int eh = evsel ? evsel->attr.exclude_hv : 0;
	int eH = evsel ? evsel->attr.exclude_host : 0;
	int eG = evsel ? evsel->attr.exclude_guest : 0;
1515
	int eI = evsel ? evsel->attr.exclude_idle : 0;
1516
	int precise = evsel ? evsel->attr.precise_ip : 0;
1517
	int precise_max = 0;
1518
	int sample_read = 0;
1519
	int pinned = evsel ? evsel->attr.pinned : 0;
1520

1521 1522
	int exclude = eu | ek | eh;
	int exclude_GH = evsel ? evsel->exclude_GH : 0;
1523
	int weak = 0;
1524 1525

	memset(mod, 0, sizeof(*mod));
1526

1527
	while (*str) {
P
Peter Zijlstra 已提交
1528 1529 1530
		if (*str == 'u') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1531
			eu = 0;
P
Peter Zijlstra 已提交
1532 1533 1534
		} else if (*str == 'k') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1535
			ek = 0;
P
Peter Zijlstra 已提交
1536 1537 1538
		} else if (*str == 'h') {
			if (!exclude)
				exclude = eu = ek = eh = 1;
1539
			eh = 0;
1540 1541 1542 1543 1544 1545 1546 1547
		} else if (*str == 'G') {
			if (!exclude_GH)
				exclude_GH = eG = eH = 1;
			eG = 0;
		} else if (*str == 'H') {
			if (!exclude_GH)
				exclude_GH = eG = eH = 1;
			eH = 0;
1548 1549
		} else if (*str == 'I') {
			eI = 1;
P
Peter Zijlstra 已提交
1550 1551
		} else if (*str == 'p') {
			precise++;
1552 1553 1554
			/* use of precise requires exclude_guest */
			if (!exclude_GH)
				eG = 1;
1555 1556
		} else if (*str == 'P') {
			precise_max = 1;
1557 1558
		} else if (*str == 'S') {
			sample_read = 1;
1559 1560
		} else if (*str == 'D') {
			pinned = 1;
1561 1562
		} else if (*str == 'W') {
			weak = 1;
P
Peter Zijlstra 已提交
1563
		} else
1564
			break;
P
Peter Zijlstra 已提交
1565

1566
		++str;
1567
	}
1568

1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580
	/*
	 * precise ip:
	 *
	 *  0 - SAMPLE_IP can have arbitrary skid
	 *  1 - SAMPLE_IP must have constant skid
	 *  2 - SAMPLE_IP requested to have 0 skid
	 *  3 - SAMPLE_IP must have 0 skid
	 *
	 *  See also PERF_RECORD_MISC_EXACT_IP
	 */
	if (precise > 3)
		return -EINVAL;
1581

1582 1583 1584 1585 1586
	mod->eu = eu;
	mod->ek = ek;
	mod->eh = eh;
	mod->eH = eH;
	mod->eG = eG;
1587
	mod->eI = eI;
1588
	mod->precise = precise;
1589
	mod->precise_max = precise_max;
1590
	mod->exclude_GH = exclude_GH;
1591
	mod->sample_read = sample_read;
1592
	mod->pinned = pinned;
1593
	mod->weak = weak;
1594

1595 1596 1597
	return 0;
}

1598 1599 1600 1601 1602 1603 1604 1605 1606
/*
 * Basic modifier sanity check to validate it contains only one
 * instance of any modifier (apart from 'p') present.
 */
static int check_modifier(char *str)
{
	char *p = str;

	/* The sizeof includes 0 byte as well. */
1607
	if (strlen(str) > (sizeof("ukhGHpppPSDIW") - 1))
1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618
		return -1;

	while (*p) {
		if (*p != 'p' && strchr(p + 1, *p))
			return -1;
		p++;
	}

	return 0;
}

1619 1620 1621 1622 1623 1624 1625 1626
int parse_events__modifier_event(struct list_head *list, char *str, bool add)
{
	struct perf_evsel *evsel;
	struct event_modifier mod;

	if (str == NULL)
		return 0;

1627 1628 1629
	if (check_modifier(str))
		return -EINVAL;

1630 1631 1632
	if (!add && get_event_modifier(&mod, str, NULL))
		return -EINVAL;

1633
	__evlist__for_each_entry(list, evsel) {
1634 1635 1636 1637 1638 1639 1640 1641 1642
		if (add && get_event_modifier(&mod, str, evsel))
			return -EINVAL;

		evsel->attr.exclude_user   = mod.eu;
		evsel->attr.exclude_kernel = mod.ek;
		evsel->attr.exclude_hv     = mod.eh;
		evsel->attr.precise_ip     = mod.precise;
		evsel->attr.exclude_host   = mod.eH;
		evsel->attr.exclude_guest  = mod.eG;
1643
		evsel->attr.exclude_idle   = mod.eI;
1644
		evsel->exclude_GH          = mod.exclude_GH;
1645
		evsel->sample_read         = mod.sample_read;
1646
		evsel->precise_max         = mod.precise_max;
1647
		evsel->weak_group	   = mod.weak;
1648 1649 1650

		if (perf_evsel__is_group_leader(evsel))
			evsel->attr.pinned = mod.pinned;
1651
	}
1652

1653 1654
	return 0;
}
1655

1656 1657 1658 1659
int parse_events_name(struct list_head *list, char *name)
{
	struct perf_evsel *evsel;

1660
	__evlist__for_each_entry(list, evsel) {
1661 1662 1663 1664 1665 1666 1667
		if (!evsel->name)
			evsel->name = strdup(name);
	}

	return 0;
}

1668 1669 1670 1671 1672 1673
static int
comp_pmu(const void *p1, const void *p2)
{
	struct perf_pmu_event_symbol *pmu1 = (struct perf_pmu_event_symbol *) p1;
	struct perf_pmu_event_symbol *pmu2 = (struct perf_pmu_event_symbol *) p2;

1674
	return strcasecmp(pmu1->symbol, pmu2->symbol);
1675 1676 1677 1678 1679 1680 1681 1682 1683 1684
}

static void perf_pmu__parse_cleanup(void)
{
	if (perf_pmu_events_list_num > 0) {
		struct perf_pmu_event_symbol *p;
		int i;

		for (i = 0; i < perf_pmu_events_list_num; i++) {
			p = perf_pmu_events_list + i;
1685
			zfree(&p->symbol);
1686
		}
1687
		zfree(&perf_pmu_events_list);
1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710
		perf_pmu_events_list_num = 0;
	}
}

#define SET_SYMBOL(str, stype)		\
do {					\
	p->symbol = str;		\
	if (!p->symbol)			\
		goto err;		\
	p->type = stype;		\
} while (0)

/*
 * Read the pmu events list from sysfs
 * Save it into perf_pmu_events_list
 */
static void perf_pmu__parse_init(void)
{

	struct perf_pmu *pmu = NULL;
	struct perf_pmu_alias *alias;
	int len = 0;

1711 1712 1713 1714 1715 1716 1717 1718 1719 1720
	pmu = NULL;
	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
		list_for_each_entry(alias, &pmu->aliases, list) {
			if (strchr(alias->name, '-'))
				len++;
			len++;
		}
	}

	if (len == 0) {
1721 1722 1723 1724 1725 1726 1727 1728 1729
		perf_pmu_events_list_num = -1;
		return;
	}
	perf_pmu_events_list = malloc(sizeof(struct perf_pmu_event_symbol) * len);
	if (!perf_pmu_events_list)
		return;
	perf_pmu_events_list_num = len;

	len = 0;
1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745
	pmu = NULL;
	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
		list_for_each_entry(alias, &pmu->aliases, list) {
			struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
			char *tmp = strchr(alias->name, '-');

			if (tmp != NULL) {
				SET_SYMBOL(strndup(alias->name, tmp - alias->name),
						PMU_EVENT_SYMBOL_PREFIX);
				p++;
				SET_SYMBOL(strdup(++tmp), PMU_EVENT_SYMBOL_SUFFIX);
				len += 2;
			} else {
				SET_SYMBOL(strdup(alias->name), PMU_EVENT_SYMBOL);
				len++;
			}
1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775
		}
	}
	qsort(perf_pmu_events_list, len,
		sizeof(struct perf_pmu_event_symbol), comp_pmu);

	return;
err:
	perf_pmu__parse_cleanup();
}

enum perf_pmu_event_symbol_type
perf_pmu__parse_check(const char *name)
{
	struct perf_pmu_event_symbol p, *r;

	/* scan kernel pmu events from sysfs if needed */
	if (perf_pmu_events_list_num == 0)
		perf_pmu__parse_init();
	/*
	 * name "cpu" could be prefix of cpu-cycles or cpu// events.
	 * cpu-cycles has been handled by hardcode.
	 * So it must be cpu// events, not kernel pmu event.
	 */
	if ((perf_pmu_events_list_num <= 0) || !strcmp(name, "cpu"))
		return PMU_EVENT_SYMBOL_ERR;

	p.symbol = strdup(name);
	r = bsearch(&p, perf_pmu_events_list,
			(size_t) perf_pmu_events_list_num,
			sizeof(struct perf_pmu_event_symbol), comp_pmu);
1776
	zfree(&p.symbol);
1777 1778 1779
	return r ? r->type : PMU_EVENT_SYMBOL_ERR;
}

1780
static int parse_events__scanner(const char *str, void *parse_state, int start_token)
1781
{
1782
	YY_BUFFER_STATE buffer;
1783
	void *scanner;
1784
	int ret;
1785

1786
	ret = parse_events_lex_init_extra(start_token, &scanner);
1787 1788 1789 1790
	if (ret)
		return ret;

	buffer = parse_events__scan_string(str, scanner);
1791

1792 1793 1794
#ifdef PARSER_DEBUG
	parse_events_debug = 1;
#endif
1795
	ret = parse_events_parse(parse_state, scanner);
1796 1797 1798 1799 1800 1801

	parse_events__flush_buffer(buffer, scanner);
	parse_events__delete_buffer(buffer, scanner);
	parse_events_lex_destroy(scanner);
	return ret;
}
1802

1803 1804 1805 1806 1807
/*
 * parse event config string, return a list of event terms.
 */
int parse_events_terms(struct list_head *terms, const char *str)
{
1808
	struct parse_events_state parse_state = {
1809 1810 1811 1812
		.terms = NULL,
	};
	int ret;

1813
	ret = parse_events__scanner(str, &parse_state, PE_START_TERMS);
1814
	if (!ret) {
1815 1816
		list_splice(parse_state.terms, terms);
		zfree(&parse_state.terms);
1817 1818 1819
		return 0;
	}

1820
	parse_events_terms__delete(parse_state.terms);
1821 1822 1823
	return ret;
}

1824 1825
int parse_events(struct perf_evlist *evlist, const char *str,
		 struct parse_events_error *err)
1826
{
1827 1828
	struct parse_events_state parse_state = {
		.list   = LIST_HEAD_INIT(parse_state.list),
1829 1830 1831
		.idx    = evlist->nr_entries,
		.error  = err,
		.evlist = evlist,
1832 1833
	};
	int ret;
1834

1835
	ret = parse_events__scanner(str, &parse_state, PE_START_EVENTS);
1836
	perf_pmu__parse_cleanup();
1837
	if (!ret) {
1838 1839
		struct perf_evsel *last;

1840
		if (list_empty(&parse_state.list)) {
1841
			WARN_ONCE(true, "WARNING: event parser found nothing\n");
1842 1843 1844
			return -1;
		}

1845 1846
		perf_evlist__splice_list_tail(evlist, &parse_state.list);
		evlist->nr_groups += parse_state.nr_groups;
1847 1848 1849
		last = perf_evlist__last(evlist);
		last->cmdline_group_boundary = true;

1850 1851
		return 0;
	}
1852

1853 1854 1855 1856 1857
	/*
	 * There are 2 users - builtin-record and builtin-test objects.
	 * Both call perf_evlist__delete in case of error, so we dont
	 * need to bother.
	 */
1858
	return ret;
1859 1860
}

1861 1862 1863 1864 1865 1866 1867 1868 1869
#define MAX_WIDTH 1000
static int get_term_width(void)
{
	struct winsize ws;

	get_term_dimensions(&ws);
	return ws.ws_col > MAX_WIDTH ? MAX_WIDTH : ws.ws_col;
}

1870 1871
void parse_events_print_error(struct parse_events_error *err,
			      const char *event)
1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887
{
	const char *str = "invalid or unsupported event: ";
	char _buf[MAX_WIDTH];
	char *buf = (char *) event;
	int idx = 0;

	if (err->str) {
		/* -2 for extra '' in the final fprintf */
		int width       = get_term_width() - 2;
		int len_event   = strlen(event);
		int len_str, max_len, cut = 0;

		/*
		 * Maximum error index indent, we will cut
		 * the event string if it's bigger.
		 */
1888
		int max_err_idx = 13;
1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899

		/*
		 * Let's be specific with the message when
		 * we have the precise error.
		 */
		str     = "event syntax error: ";
		len_str = strlen(str);
		max_len = width - len_str;

		buf = _buf;

1900
		/* We're cutting from the beginning. */
1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922
		if (err->idx > max_err_idx)
			cut = err->idx - max_err_idx;

		strncpy(buf, event + cut, max_len);

		/* Mark cut parts with '..' on both sides. */
		if (cut)
			buf[0] = buf[1] = '.';

		if ((len_event - cut) > max_len) {
			buf[max_len - 1] = buf[max_len - 2] = '.';
			buf[max_len] = 0;
		}

		idx = len_str + err->idx - cut;
	}

	fprintf(stderr, "%s'%s'\n", str, buf);
	if (idx) {
		fprintf(stderr, "%*s\\___ %s\n", idx + 1, "", err->str);
		if (err->help)
			fprintf(stderr, "\n%s\n", err->help);
1923 1924
		zfree(&err->str);
		zfree(&err->help);
1925 1926 1927 1928 1929
	}
}

#undef MAX_WIDTH

1930
int parse_events_option(const struct option *opt, const char *str,
1931
			int unset __maybe_unused)
1932 1933
{
	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
1934 1935 1936
	struct parse_events_error err = { .idx = 0, };
	int ret = parse_events(evlist, str, &err);

1937
	if (ret) {
1938
		parse_events_print_error(&err, str);
1939 1940
		fprintf(stderr, "Run 'perf list' for a list of valid events\n");
	}
1941 1942

	return ret;
1943 1944
}

1945 1946 1947 1948 1949
static int
foreach_evsel_in_last_glob(struct perf_evlist *evlist,
			   int (*func)(struct perf_evsel *evsel,
				       const void *arg),
			   const void *arg)
L
Li Zefan 已提交
1950
{
1951
	struct perf_evsel *last = NULL;
1952
	int err;
L
Li Zefan 已提交
1953

1954 1955 1956 1957 1958 1959
	/*
	 * Don't return when list_empty, give func a chance to report
	 * error when it found last == NULL.
	 *
	 * So no need to WARN here, let *func do this.
	 */
1960
	if (evlist->nr_entries > 0)
1961
		last = perf_evlist__last(evlist);
1962

1963
	do {
1964 1965
		err = (*func)(last, arg);
		if (err)
1966
			return -1;
1967 1968
		if (!last)
			return 0;
1969 1970 1971 1972 1973

		if (last->node.prev == &evlist->entries)
			return 0;
		last = list_entry(last->node.prev, struct perf_evsel, node);
	} while (!last->cmdline_group_boundary);
L
Li Zefan 已提交
1974 1975 1976 1977

	return 0;
}

1978 1979 1980
static int set_filter(struct perf_evsel *evsel, const void *arg)
{
	const char *str = arg;
1981 1982 1983
	bool found = false;
	int nr_addr_filters = 0;
	struct perf_pmu *pmu = NULL;
1984

1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995
	if (evsel == NULL)
		goto err;

	if (evsel->attr.type == PERF_TYPE_TRACEPOINT) {
		if (perf_evsel__append_tp_filter(evsel, str) < 0) {
			fprintf(stderr,
				"not enough memory to hold filter string\n");
			return -1;
		}

		return 0;
1996 1997
	}

1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
	while ((pmu = perf_pmu__scan(pmu)) != NULL)
		if (pmu->type == evsel->attr.type) {
			found = true;
			break;
		}

	if (found)
		perf_pmu__scan_file(pmu, "nr_addr_filters",
				    "%d", &nr_addr_filters);

	if (!nr_addr_filters)
		goto err;

	if (perf_evsel__append_addr_filter(evsel, str) < 0) {
2012 2013 2014 2015 2016 2017
		fprintf(stderr,
			"not enough memory to hold filter string\n");
		return -1;
	}

	return 0;
2018 2019 2020 2021 2022 2023

err:
	fprintf(stderr,
		"--filter option should follow a -e tracepoint or HW tracer option\n");

	return -1;
2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047
}

int parse_filter(const struct option *opt, const char *str,
		 int unset __maybe_unused)
{
	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;

	return foreach_evsel_in_last_glob(evlist, set_filter,
					  (const void *)str);
}

static int add_exclude_perf_filter(struct perf_evsel *evsel,
				   const void *arg __maybe_unused)
{
	char new_filter[64];

	if (evsel == NULL || evsel->attr.type != PERF_TYPE_TRACEPOINT) {
		fprintf(stderr,
			"--exclude-perf option should follow a -e tracepoint option\n");
		return -1;
	}

	snprintf(new_filter, sizeof(new_filter), "common_pid != %d", getpid());

2048
	if (perf_evsel__append_tp_filter(evsel, new_filter) < 0) {
2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066
		fprintf(stderr,
			"not enough memory to hold filter string\n");
		return -1;
	}

	return 0;
}

int exclude_perf(const struct option *opt,
		 const char *arg __maybe_unused,
		 int unset __maybe_unused)
{
	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;

	return foreach_evsel_in_last_glob(evlist, add_exclude_perf_filter,
					  NULL);
}

2067 2068 2069 2070 2071
static const char * const event_type_descriptors[] = {
	"Hardware event",
	"Software event",
	"Tracepoint event",
	"Hardware cache event",
2072 2073
	"Raw hardware event descriptor",
	"Hardware breakpoint",
2074 2075
};

2076 2077 2078 2079 2080 2081 2082 2083
static int cmp_string(const void *a, const void *b)
{
	const char * const *as = a;
	const char * const *bs = b;

	return strcmp(*as, *bs);
}

2084 2085 2086 2087
/*
 * Print the events from <debugfs_mount_point>/tracing/events
 */

2088 2089
void print_tracepoint_events(const char *subsys_glob, const char *event_glob,
			     bool name_only)
2090 2091
{
	DIR *sys_dir, *evt_dir;
2092
	struct dirent *sys_dirent, *evt_dirent;
2093
	char evt_path[MAXPATHLEN];
E
Eric Dumazet 已提交
2094
	char dir_path[MAXPATHLEN];
2095 2096 2097
	char **evt_list = NULL;
	unsigned int evt_i = 0, evt_num = 0;
	bool evt_num_known = false;
2098

2099
restart:
2100
	sys_dir = opendir(tracing_events_path);
2101
	if (!sys_dir)
E
Eric Dumazet 已提交
2102
		return;
2103

2104 2105 2106 2107 2108 2109
	if (evt_num_known) {
		evt_list = zalloc(sizeof(char *) * evt_num);
		if (!evt_list)
			goto out_close_sys_dir;
	}

2110
	for_each_subsystem(sys_dir, sys_dirent) {
2111
		if (subsys_glob != NULL &&
2112
		    !strglobmatch(sys_dirent->d_name, subsys_glob))
2113
			continue;
E
Eric Dumazet 已提交
2114

2115
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
2116
			 sys_dirent->d_name);
E
Eric Dumazet 已提交
2117 2118
		evt_dir = opendir(dir_path);
		if (!evt_dir)
2119
			continue;
E
Eric Dumazet 已提交
2120

2121
		for_each_event(dir_path, evt_dir, evt_dirent) {
2122
			if (event_glob != NULL &&
2123
			    !strglobmatch(evt_dirent->d_name, event_glob))
2124 2125
				continue;

2126 2127
			if (!evt_num_known) {
				evt_num++;
2128 2129 2130
				continue;
			}

2131
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2132
				 sys_dirent->d_name, evt_dirent->d_name);
2133 2134 2135 2136 2137

			evt_list[evt_i] = strdup(evt_path);
			if (evt_list[evt_i] == NULL)
				goto out_close_evt_dir;
			evt_i++;
2138 2139 2140 2141
		}
		closedir(evt_dir);
	}
	closedir(sys_dir);
2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156

	if (!evt_num_known) {
		evt_num_known = true;
		goto restart;
	}
	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
	evt_i = 0;
	while (evt_i < evt_num) {
		if (name_only) {
			printf("%s ", evt_list[evt_i++]);
			continue;
		}
		printf("  %-50s [%s]\n", evt_list[evt_i++],
				event_type_descriptors[PERF_TYPE_TRACEPOINT]);
	}
2157
	if (evt_num && pager_in_use())
2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175
		printf("\n");

out_free:
	evt_num = evt_i;
	for (evt_i = 0; evt_i < evt_num; evt_i++)
		zfree(&evt_list[evt_i]);
	zfree(&evt_list);
	return;

out_close_evt_dir:
	closedir(evt_dir);
out_close_sys_dir:
	closedir(sys_dir);

	printf("FATAL: not enough memory to print %s\n",
			event_type_descriptors[PERF_TYPE_TRACEPOINT]);
	if (evt_list)
		goto out_free;
2176 2177
}

2178 2179 2180 2181 2182 2183 2184
/*
 * Check whether event is in <debugfs_mount_point>/tracing/events
 */

int is_valid_tracepoint(const char *event_string)
{
	DIR *sys_dir, *evt_dir;
2185
	struct dirent *sys_dirent, *evt_dirent;
2186 2187 2188
	char evt_path[MAXPATHLEN];
	char dir_path[MAXPATHLEN];

2189
	sys_dir = opendir(tracing_events_path);
2190 2191 2192
	if (!sys_dir)
		return 0;

2193
	for_each_subsystem(sys_dir, sys_dirent) {
2194

2195
		snprintf(dir_path, MAXPATHLEN, "%s/%s", tracing_events_path,
2196
			 sys_dirent->d_name);
2197 2198 2199 2200
		evt_dir = opendir(dir_path);
		if (!evt_dir)
			continue;

2201
		for_each_event(dir_path, evt_dir, evt_dirent) {
2202
			snprintf(evt_path, MAXPATHLEN, "%s:%s",
2203
				 sys_dirent->d_name, evt_dirent->d_name);
2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215
			if (!strcmp(evt_path, event_string)) {
				closedir(evt_dir);
				closedir(sys_dir);
				return 1;
			}
		}
		closedir(evt_dir);
	}
	closedir(sys_dir);
	return 0;
}

2216 2217 2218
static bool is_event_supported(u8 type, unsigned config)
{
	bool ret = true;
2219
	int open_return;
2220 2221 2222 2223 2224 2225
	struct perf_evsel *evsel;
	struct perf_event_attr attr = {
		.type = type,
		.config = config,
		.disabled = 1,
	};
2226 2227 2228 2229
	struct thread_map *tmap = thread_map__new_by_tid(0);

	if (tmap == NULL)
		return false;
2230

2231
	evsel = perf_evsel__new(&attr);
2232
	if (evsel) {
2233
		open_return = perf_evsel__open(evsel, NULL, tmap);
2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244
		ret = open_return >= 0;

		if (open_return == -EACCES) {
			/*
			 * This happens if the paranoid value
			 * /proc/sys/kernel/perf_event_paranoid is set to 2
			 * Re-run with exclude_kernel set; we don't do that
			 * by default as some ARM machines do not support it.
			 *
			 */
			evsel->attr.exclude_kernel = 1;
2245
			ret = perf_evsel__open(evsel, NULL, tmap) >= 0;
2246
		}
2247 2248 2249 2250 2251 2252
		perf_evsel__delete(evsel);
	}

	return ret;
}

2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275
void print_sdt_events(const char *subsys_glob, const char *event_glob,
		      bool name_only)
{
	struct probe_cache *pcache;
	struct probe_cache_entry *ent;
	struct strlist *bidlist, *sdtlist;
	struct strlist_config cfg = {.dont_dupstr = true};
	struct str_node *nd, *nd2;
	char *buf, *path, *ptr = NULL;
	bool show_detail = false;
	int ret;

	sdtlist = strlist__new(NULL, &cfg);
	if (!sdtlist) {
		pr_debug("Failed to allocate new strlist for SDT\n");
		return;
	}
	bidlist = build_id_cache__list_all(true);
	if (!bidlist) {
		pr_debug("Failed to get buildids: %d\n", errno);
		return;
	}
	strlist__for_each_entry(nd, bidlist) {
2276
		pcache = probe_cache__new(nd->s, NULL);
2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331
		if (!pcache)
			continue;
		list_for_each_entry(ent, &pcache->entries, node) {
			if (!ent->sdt)
				continue;
			if (subsys_glob &&
			    !strglobmatch(ent->pev.group, subsys_glob))
				continue;
			if (event_glob &&
			    !strglobmatch(ent->pev.event, event_glob))
				continue;
			ret = asprintf(&buf, "%s:%s@%s", ent->pev.group,
					ent->pev.event, nd->s);
			if (ret > 0)
				strlist__add(sdtlist, buf);
		}
		probe_cache__delete(pcache);
	}
	strlist__delete(bidlist);

	strlist__for_each_entry(nd, sdtlist) {
		buf = strchr(nd->s, '@');
		if (buf)
			*(buf++) = '\0';
		if (name_only) {
			printf("%s ", nd->s);
			continue;
		}
		nd2 = strlist__next(nd);
		if (nd2) {
			ptr = strchr(nd2->s, '@');
			if (ptr)
				*ptr = '\0';
			if (strcmp(nd->s, nd2->s) == 0)
				show_detail = true;
		}
		if (show_detail) {
			path = build_id_cache__origname(buf);
			ret = asprintf(&buf, "%s@%s(%.12s)", nd->s, path, buf);
			if (ret > 0) {
				printf("  %-50s [%s]\n", buf, "SDT event");
				free(buf);
			}
		} else
			printf("  %-50s [%s]\n", nd->s, "SDT event");
		if (nd2) {
			if (strcmp(nd->s, nd2->s) != 0)
				show_detail = false;
			if (ptr)
				*ptr = '@';
		}
	}
	strlist__delete(sdtlist);
}

2332
int print_hwcache_events(const char *event_glob, bool name_only)
2333
{
2334
	unsigned int type, op, i, evt_i = 0, evt_num = 0;
2335
	char name[64];
2336 2337 2338 2339 2340 2341 2342 2343 2344
	char **evt_list = NULL;
	bool evt_num_known = false;

restart:
	if (evt_num_known) {
		evt_list = zalloc(sizeof(char *) * evt_num);
		if (!evt_list)
			goto out_enomem;
	}
2345 2346 2347 2348

	for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
		for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
			/* skip invalid cache type */
2349
			if (!perf_evsel__is_cache_op_valid(type, op))
2350 2351 2352
				continue;

			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
2353 2354
				__perf_evsel__hw_cache_type_op_res_name(type, op, i,
									name, sizeof(name));
2355
				if (event_glob != NULL && !strglobmatch(name, event_glob))
2356 2357
					continue;

2358 2359 2360 2361
				if (!is_event_supported(PERF_TYPE_HW_CACHE,
							type | (op << 8) | (i << 16)))
					continue;

2362 2363 2364 2365 2366 2367 2368 2369 2370
				if (!evt_num_known) {
					evt_num++;
					continue;
				}

				evt_list[evt_i] = strdup(name);
				if (evt_list[evt_i] == NULL)
					goto out_enomem;
				evt_i++;
2371 2372 2373 2374
			}
		}
	}

2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388
	if (!evt_num_known) {
		evt_num_known = true;
		goto restart;
	}
	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
	evt_i = 0;
	while (evt_i < evt_num) {
		if (name_only) {
			printf("%s ", evt_list[evt_i++]);
			continue;
		}
		printf("  %-50s [%s]\n", evt_list[evt_i++],
				event_type_descriptors[PERF_TYPE_HW_CACHE]);
	}
2389
	if (evt_num && pager_in_use())
2390
		printf("\n");
2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403

out_free:
	evt_num = evt_i;
	for (evt_i = 0; evt_i < evt_num; evt_i++)
		zfree(&evt_list[evt_i]);
	zfree(&evt_list);
	return evt_num;

out_enomem:
	printf("FATAL: not enough memory to print %s\n", event_type_descriptors[PERF_TYPE_HW_CACHE]);
	if (evt_list)
		goto out_free;
	return evt_num;
2404 2405
}

2406
void print_symbol_events(const char *event_glob, unsigned type,
2407 2408
				struct event_symbol *syms, unsigned max,
				bool name_only)
2409
{
2410
	unsigned int i, evt_i = 0, evt_num = 0;
2411
	char name[MAX_NAME_LEN];
2412 2413 2414 2415 2416 2417 2418 2419 2420 2421
	char **evt_list = NULL;
	bool evt_num_known = false;

restart:
	if (evt_num_known) {
		evt_list = zalloc(sizeof(char *) * evt_num);
		if (!evt_list)
			goto out_enomem;
		syms -= max;
	}
2422

2423
	for (i = 0; i < max; i++, syms++) {
2424

2425
		if (event_glob != NULL && syms->symbol != NULL &&
2426 2427 2428
		    !(strglobmatch(syms->symbol, event_glob) ||
		      (syms->alias && strglobmatch(syms->alias, event_glob))))
			continue;
2429

2430 2431 2432
		if (!is_event_supported(type, i))
			continue;

2433 2434
		if (!evt_num_known) {
			evt_num++;
2435 2436 2437
			continue;
		}

2438
		if (!name_only && strlen(syms->alias))
2439
			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
2440
		else
2441
			strncpy(name, syms->symbol, MAX_NAME_LEN);
2442

2443 2444 2445 2446
		evt_list[evt_i] = strdup(name);
		if (evt_list[evt_i] == NULL)
			goto out_enomem;
		evt_i++;
2447 2448
	}

2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461
	if (!evt_num_known) {
		evt_num_known = true;
		goto restart;
	}
	qsort(evt_list, evt_num, sizeof(char *), cmp_string);
	evt_i = 0;
	while (evt_i < evt_num) {
		if (name_only) {
			printf("%s ", evt_list[evt_i++]);
			continue;
		}
		printf("  %-50s [%s]\n", evt_list[evt_i++], event_type_descriptors[type]);
	}
2462
	if (evt_num && pager_in_use())
2463
		printf("\n");
2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475

out_free:
	evt_num = evt_i;
	for (evt_i = 0; evt_i < evt_num; evt_i++)
		zfree(&evt_list[evt_i]);
	zfree(&evt_list);
	return;

out_enomem:
	printf("FATAL: not enough memory to print %s\n", event_type_descriptors[type]);
	if (evt_list)
		goto out_free;
2476 2477 2478 2479 2480
}

/*
 * Print the help text for the event symbols:
 */
2481
void print_events(const char *event_glob, bool name_only, bool quiet_flag,
2482
			bool long_desc, bool details_flag)
2483 2484
{
	print_symbol_events(event_glob, PERF_TYPE_HARDWARE,
2485
			    event_symbols_hw, PERF_COUNT_HW_MAX, name_only);
2486 2487

	print_symbol_events(event_glob, PERF_TYPE_SOFTWARE,
2488
			    event_symbols_sw, PERF_COUNT_SW_MAX, name_only);
2489

2490
	print_hwcache_events(event_glob, name_only);
2491

2492 2493
	print_pmu_events(event_glob, name_only, quiet_flag, long_desc,
			details_flag);
2494

2495 2496
	if (event_glob != NULL)
		return;
2497

2498 2499 2500 2501 2502 2503 2504
	if (!name_only) {
		printf("  %-50s [%s]\n",
		       "rNNN",
		       event_type_descriptors[PERF_TYPE_RAW]);
		printf("  %-50s [%s]\n",
		       "cpu/t1=v1[,t2=v2,t3 ...]/modifier",
		       event_type_descriptors[PERF_TYPE_RAW]);
2505 2506
		if (pager_in_use())
			printf("   (see 'man perf-list' on how to encode it)\n\n");
2507 2508

		printf("  %-50s [%s]\n",
2509
		       "mem:<addr>[/len][:access]",
2510
			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
2511 2512
		if (pager_in_use())
			printf("\n");
2513
	}
2514

2515
	print_tracepoint_events(NULL, NULL, name_only);
2516 2517

	print_sdt_events(NULL, NULL, name_only);
2518 2519

	metricgroup__print(true, true, NULL, name_only);
2520
}
2521

2522
int parse_events__is_hardcoded_term(struct parse_events_term *term)
2523
{
2524
	return term->type_term != PARSE_EVENTS__TERM_TYPE_USER;
2525 2526
}

2527 2528 2529
static int new_term(struct parse_events_term **_term,
		    struct parse_events_term *temp,
		    char *str, u64 num)
2530
{
2531
	struct parse_events_term *term;
2532

2533
	term = malloc(sizeof(*term));
2534 2535 2536
	if (!term)
		return -ENOMEM;

2537
	*term = *temp;
2538
	INIT_LIST_HEAD(&term->list);
2539
	term->weak = false;
2540

2541
	switch (term->type_val) {
2542 2543 2544 2545 2546 2547 2548
	case PARSE_EVENTS__TERM_TYPE_NUM:
		term->val.num = num;
		break;
	case PARSE_EVENTS__TERM_TYPE_STR:
		term->val.str = str;
		break;
	default:
2549
		free(term);
2550 2551 2552 2553 2554 2555 2556
		return -EINVAL;
	}

	*_term = term;
	return 0;
}

2557
int parse_events_term__num(struct parse_events_term **term,
2558
			   int type_term, char *config, u64 num,
2559
			   bool no_value,
2560
			   void *loc_term_, void *loc_val_)
2561
{
2562 2563 2564
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

2565 2566 2567 2568
	struct parse_events_term temp = {
		.type_val  = PARSE_EVENTS__TERM_TYPE_NUM,
		.type_term = type_term,
		.config    = config,
2569
		.no_value  = no_value,
2570 2571 2572 2573 2574
		.err_term  = loc_term ? loc_term->first_column : 0,
		.err_val   = loc_val  ? loc_val->first_column  : 0,
	};

	return new_term(term, &temp, NULL, num);
2575 2576
}

2577
int parse_events_term__str(struct parse_events_term **term,
2578
			   int type_term, char *config, char *str,
2579
			   void *loc_term_, void *loc_val_)
2580
{
2581 2582 2583
	YYLTYPE *loc_term = loc_term_;
	YYLTYPE *loc_val = loc_val_;

2584 2585 2586 2587 2588 2589 2590 2591 2592
	struct parse_events_term temp = {
		.type_val  = PARSE_EVENTS__TERM_TYPE_STR,
		.type_term = type_term,
		.config    = config,
		.err_term  = loc_term ? loc_term->first_column : 0,
		.err_val   = loc_val  ? loc_val->first_column  : 0,
	};

	return new_term(term, &temp, str, 0);
2593 2594
}

2595
int parse_events_term__sym_hw(struct parse_events_term **term,
2596 2597 2598
			      char *config, unsigned idx)
{
	struct event_symbol *sym;
2599 2600 2601 2602 2603
	struct parse_events_term temp = {
		.type_val  = PARSE_EVENTS__TERM_TYPE_STR,
		.type_term = PARSE_EVENTS__TERM_TYPE_USER,
		.config    = config ?: (char *) "event",
	};
2604 2605 2606 2607

	BUG_ON(idx >= PERF_COUNT_HW_MAX);
	sym = &event_symbols_hw[idx];

2608
	return new_term(term, &temp, (char *) sym->symbol, 0);
2609 2610
}

2611 2612
int parse_events_term__clone(struct parse_events_term **new,
			     struct parse_events_term *term)
2613
{
2614 2615 2616 2617 2618 2619 2620 2621 2622
	struct parse_events_term temp = {
		.type_val  = term->type_val,
		.type_term = term->type_term,
		.config    = term->config,
		.err_term  = term->err_term,
		.err_val   = term->err_val,
	};

	return new_term(new, &temp, term->val.str, term->val.num);
2623 2624
}

2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649
int parse_events_copy_term_list(struct list_head *old,
				 struct list_head **new)
{
	struct parse_events_term *term, *n;
	int ret;

	if (!old) {
		*new = NULL;
		return 0;
	}

	*new = malloc(sizeof(struct list_head));
	if (!*new)
		return -ENOMEM;
	INIT_LIST_HEAD(*new);

	list_for_each_entry (term, old, list) {
		ret = parse_events_term__clone(&n, term);
		if (ret)
			return ret;
		list_add_tail(&n->list, *new);
	}
	return 0;
}

2650
void parse_events_terms__purge(struct list_head *terms)
2651
{
2652
	struct parse_events_term *term, *h;
2653

2654
	list_for_each_entry_safe(term, h, terms, list) {
2655
		if (term->array.nr_ranges)
2656
			zfree(&term->array.ranges);
2657
		list_del_init(&term->list);
2658
		free(term);
2659
	}
2660
}
2661

2662
void parse_events_terms__delete(struct list_head *terms)
2663
{
2664 2665
	if (!terms)
		return;
2666
	parse_events_terms__purge(terms);
2667
	free(terms);
2668 2669
}

2670 2671
void parse_events__clear_array(struct parse_events_array *a)
{
2672
	zfree(&a->ranges);
2673 2674
}

2675
void parse_events_evlist_error(struct parse_events_state *parse_state,
2676 2677
			       int idx, const char *str)
{
2678
	struct parse_events_error *err = parse_state->error;
2679

2680 2681
	if (!err)
		return;
2682 2683 2684 2685
	err->idx = idx;
	err->str = strdup(str);
	WARN_ONCE(!err->str, "WARNING: failed to allocate error string");
}
2686

2687 2688 2689 2690 2691 2692 2693 2694 2695
static void config_terms_list(char *buf, size_t buf_sz)
{
	int i;
	bool first = true;

	buf[0] = '\0';
	for (i = 0; i < __PARSE_EVENTS__TERM_TYPE_NR; i++) {
		const char *name = config_term_names[i];

2696 2697
		if (!config_term_avail(i, NULL))
			continue;
2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713
		if (!name)
			continue;
		if (name[0] == '<')
			continue;

		if (strlen(buf) + strlen(name) + 2 >= buf_sz)
			return;

		if (!first)
			strcat(buf, ",");
		else
			first = false;
		strcat(buf, name);
	}
}

2714 2715 2716 2717 2718 2719 2720
/*
 * Return string contains valid config terms of an event.
 * @additional_terms: For terms such as PMU sysfs terms.
 */
char *parse_events_formats_error_string(char *additional_terms)
{
	char *str;
W
Wang Nan 已提交
2721
	/* "no-overwrite" is the longest name */
2722
	char static_terms[__PARSE_EVENTS__TERM_TYPE_NR *
W
Wang Nan 已提交
2723
			  (sizeof("no-overwrite") - 1)];
2724

2725
	config_terms_list(static_terms, sizeof(static_terms));
2726 2727
	/* valid terms */
	if (additional_terms) {
2728 2729
		if (asprintf(&str, "valid terms: %s,%s",
			     additional_terms, static_terms) < 0)
2730 2731
			goto fail;
	} else {
2732
		if (asprintf(&str, "valid terms: %s", static_terms) < 0)
2733 2734 2735 2736 2737 2738 2739
			goto fail;
	}
	return str;

fail:
	return NULL;
}