xref: /linux/tools/perf/util/parse-events.c (revision 12871a0bd67dd4db4418e1daafcd46e9d329ef10) 
1 #include "../../../include/linux/hw_breakpoint.h"
2 #include "util.h"
3 #include "../perf.h"
4 #include "evlist.h"
5 #include "evsel.h"
6 #include "parse-options.h"
7 #include "parse-events.h"
8 #include "exec_cmd.h"
9 #include "string.h"
10 #include "symbol.h"
11 #include "cache.h"
12 #include "header.h"
13 #include "debugfs.h"
14 
15 struct event_symbol {
16 	u8		type;
17 	u64		config;
18 	const char	*symbol;
19 	const char	*alias;
20 };
21 
22 enum event_result {
23 	EVT_FAILED,
24 	EVT_HANDLED,
25 	EVT_HANDLED_ALL
26 };
27 
28 char debugfs_path[MAXPATHLEN];
29 
30 #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
31 #define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
32 
33 static struct event_symbol event_symbols[] = {
34   { CHW(CPU_CYCLES),			"cpu-cycles",			"cycles"		},
35   { CHW(STALLED_CYCLES_FRONTEND),	"stalled-cycles-frontend",	"idle-cycles-frontend"	},
36   { CHW(STALLED_CYCLES_BACKEND),	"stalled-cycles-backend",	"idle-cycles-backend"	},
37   { CHW(INSTRUCTIONS),			"instructions",			""			},
38   { CHW(CACHE_REFERENCES),		"cache-references",		""			},
39   { CHW(CACHE_MISSES),			"cache-misses",			""			},
40   { CHW(BRANCH_INSTRUCTIONS),		"branch-instructions",		"branches"		},
41   { CHW(BRANCH_MISSES),			"branch-misses",		""			},
42   { CHW(BUS_CYCLES),			"bus-cycles",			""			},
43 
44   { CSW(CPU_CLOCK),			"cpu-clock",			""			},
45   { CSW(TASK_CLOCK),			"task-clock",			""			},
46   { CSW(PAGE_FAULTS),			"page-faults",			"faults"		},
47   { CSW(PAGE_FAULTS_MIN),		"minor-faults",			""			},
48   { CSW(PAGE_FAULTS_MAJ),		"major-faults",			""			},
49   { CSW(CONTEXT_SWITCHES),		"context-switches",		"cs"			},
50   { CSW(CPU_MIGRATIONS),		"cpu-migrations",		"migrations"		},
51   { CSW(ALIGNMENT_FAULTS),		"alignment-faults",		""			},
52   { CSW(EMULATION_FAULTS),		"emulation-faults",		""			},
53 };
54 
55 #define __PERF_EVENT_FIELD(config, name) \
56 	((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
57 
58 #define PERF_EVENT_RAW(config)		__PERF_EVENT_FIELD(config, RAW)
59 #define PERF_EVENT_CONFIG(config)	__PERF_EVENT_FIELD(config, CONFIG)
60 #define PERF_EVENT_TYPE(config)		__PERF_EVENT_FIELD(config, TYPE)
61 #define PERF_EVENT_ID(config)		__PERF_EVENT_FIELD(config, EVENT)
62 
63 static const char *hw_event_names[PERF_COUNT_HW_MAX] = {
64 	"cycles",
65 	"instructions",
66 	"cache-references",
67 	"cache-misses",
68 	"branches",
69 	"branch-misses",
70 	"bus-cycles",
71 	"stalled-cycles-frontend",
72 	"stalled-cycles-backend",
73 };
74 
75 static const char *sw_event_names[PERF_COUNT_SW_MAX] = {
76 	"cpu-clock",
77 	"task-clock",
78 	"page-faults",
79 	"context-switches",
80 	"CPU-migrations",
81 	"minor-faults",
82 	"major-faults",
83 	"alignment-faults",
84 	"emulation-faults",
85 };
86 
87 #define MAX_ALIASES 8
88 
89 static const char *hw_cache[][MAX_ALIASES] = {
90  { "L1-dcache",	"l1-d",		"l1d",		"L1-data",		},
91  { "L1-icache",	"l1-i",		"l1i",		"L1-instruction",	},
92  { "LLC",	"L2"							},
93  { "dTLB",	"d-tlb",	"Data-TLB",				},
94  { "iTLB",	"i-tlb",	"Instruction-TLB",			},
95  { "branch",	"branches",	"bpu",		"btb",		"bpc",	},
96 };
97 
98 static const char *hw_cache_op[][MAX_ALIASES] = {
99  { "load",	"loads",	"read",					},
100  { "store",	"stores",	"write",				},
101  { "prefetch",	"prefetches",	"speculative-read", "speculative-load",	},
102 };
103 
104 static const char *hw_cache_result[][MAX_ALIASES] = {
105  { "refs",	"Reference",	"ops",		"access",		},
106  { "misses",	"miss",							},
107 };
108 
109 #define C(x)		PERF_COUNT_HW_CACHE_##x
110 #define CACHE_READ	(1 << C(OP_READ))
111 #define CACHE_WRITE	(1 << C(OP_WRITE))
112 #define CACHE_PREFETCH	(1 << C(OP_PREFETCH))
113 #define COP(x)		(1 << x)
114 
115 /*
116  * cache operartion stat
117  * L1I : Read and prefetch only
118  * ITLB and BPU : Read-only
119  */
120 static unsigned long hw_cache_stat[C(MAX)] = {
121  [C(L1D)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
122  [C(L1I)]	= (CACHE_READ | CACHE_PREFETCH),
123  [C(LL)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
124  [C(DTLB)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
125  [C(ITLB)]	= (CACHE_READ),
126  [C(BPU)]	= (CACHE_READ),
127 };
128 
129 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)	       \
130 	while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)	       \
131 	if (sys_dirent.d_type == DT_DIR &&				       \
132 	   (strcmp(sys_dirent.d_name, ".")) &&				       \
133 	   (strcmp(sys_dirent.d_name, "..")))
134 
135 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
136 {
137 	char evt_path[MAXPATHLEN];
138 	int fd;
139 
140 	snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
141 			sys_dir->d_name, evt_dir->d_name);
142 	fd = open(evt_path, O_RDONLY);
143 	if (fd < 0)
144 		return -EINVAL;
145 	close(fd);
146 
147 	return 0;
148 }
149 
150 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)	       \
151 	while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
152 	if (evt_dirent.d_type == DT_DIR &&				       \
153 	   (strcmp(evt_dirent.d_name, ".")) &&				       \
154 	   (strcmp(evt_dirent.d_name, "..")) &&				       \
155 	   (!tp_event_has_id(&sys_dirent, &evt_dirent)))
156 
157 #define MAX_EVENT_LENGTH 512
158 
159 
160 struct tracepoint_path *tracepoint_id_to_path(u64 config)
161 {
162 	struct tracepoint_path *path = NULL;
163 	DIR *sys_dir, *evt_dir;
164 	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
165 	char id_buf[4];
166 	int fd;
167 	u64 id;
168 	char evt_path[MAXPATHLEN];
169 	char dir_path[MAXPATHLEN];
170 
171 	if (debugfs_valid_mountpoint(debugfs_path))
172 		return NULL;
173 
174 	sys_dir = opendir(debugfs_path);
175 	if (!sys_dir)
176 		return NULL;
177 
178 	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
179 
180 		snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
181 			 sys_dirent.d_name);
182 		evt_dir = opendir(dir_path);
183 		if (!evt_dir)
184 			continue;
185 
186 		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
187 
188 			snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
189 				 evt_dirent.d_name);
190 			fd = open(evt_path, O_RDONLY);
191 			if (fd < 0)
192 				continue;
193 			if (read(fd, id_buf, sizeof(id_buf)) < 0) {
194 				close(fd);
195 				continue;
196 			}
197 			close(fd);
198 			id = atoll(id_buf);
199 			if (id == config) {
200 				closedir(evt_dir);
201 				closedir(sys_dir);
202 				path = zalloc(sizeof(*path));
203 				path->system = malloc(MAX_EVENT_LENGTH);
204 				if (!path->system) {
205 					free(path);
206 					return NULL;
207 				}
208 				path->name = malloc(MAX_EVENT_LENGTH);
209 				if (!path->name) {
210 					free(path->system);
211 					free(path);
212 					return NULL;
213 				}
214 				strncpy(path->system, sys_dirent.d_name,
215 					MAX_EVENT_LENGTH);
216 				strncpy(path->name, evt_dirent.d_name,
217 					MAX_EVENT_LENGTH);
218 				return path;
219 			}
220 		}
221 		closedir(evt_dir);
222 	}
223 
224 	closedir(sys_dir);
225 	return NULL;
226 }
227 
228 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
229 static const char *tracepoint_id_to_name(u64 config)
230 {
231 	static char buf[TP_PATH_LEN];
232 	struct tracepoint_path *path;
233 
234 	path = tracepoint_id_to_path(config);
235 	if (path) {
236 		snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
237 		free(path->name);
238 		free(path->system);
239 		free(path);
240 	} else
241 		snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
242 
243 	return buf;
244 }
245 
246 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
247 {
248 	if (hw_cache_stat[cache_type] & COP(cache_op))
249 		return 1;	/* valid */
250 	else
251 		return 0;	/* invalid */
252 }
253 
254 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
255 {
256 	static char name[50];
257 
258 	if (cache_result) {
259 		sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
260 			hw_cache_op[cache_op][0],
261 			hw_cache_result[cache_result][0]);
262 	} else {
263 		sprintf(name, "%s-%s", hw_cache[cache_type][0],
264 			hw_cache_op[cache_op][1]);
265 	}
266 
267 	return name;
268 }
269 
270 const char *event_type(int type)
271 {
272 	switch (type) {
273 	case PERF_TYPE_HARDWARE:
274 		return "hardware";
275 
276 	case PERF_TYPE_SOFTWARE:
277 		return "software";
278 
279 	case PERF_TYPE_TRACEPOINT:
280 		return "tracepoint";
281 
282 	case PERF_TYPE_HW_CACHE:
283 		return "hardware-cache";
284 
285 	default:
286 		break;
287 	}
288 
289 	return "unknown";
290 }
291 
292 const char *event_name(struct perf_evsel *evsel)
293 {
294 	u64 config = evsel->attr.config;
295 	int type = evsel->attr.type;
296 
297 	if (evsel->name)
298 		return evsel->name;
299 
300 	return __event_name(type, config);
301 }
302 
303 const char *__event_name(int type, u64 config)
304 {
305 	static char buf[32];
306 
307 	if (type == PERF_TYPE_RAW) {
308 		sprintf(buf, "raw 0x%" PRIx64, config);
309 		return buf;
310 	}
311 
312 	switch (type) {
313 	case PERF_TYPE_HARDWARE:
314 		if (config < PERF_COUNT_HW_MAX && hw_event_names[config])
315 			return hw_event_names[config];
316 		return "unknown-hardware";
317 
318 	case PERF_TYPE_HW_CACHE: {
319 		u8 cache_type, cache_op, cache_result;
320 
321 		cache_type   = (config >>  0) & 0xff;
322 		if (cache_type > PERF_COUNT_HW_CACHE_MAX)
323 			return "unknown-ext-hardware-cache-type";
324 
325 		cache_op     = (config >>  8) & 0xff;
326 		if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
327 			return "unknown-ext-hardware-cache-op";
328 
329 		cache_result = (config >> 16) & 0xff;
330 		if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
331 			return "unknown-ext-hardware-cache-result";
332 
333 		if (!is_cache_op_valid(cache_type, cache_op))
334 			return "invalid-cache";
335 
336 		return event_cache_name(cache_type, cache_op, cache_result);
337 	}
338 
339 	case PERF_TYPE_SOFTWARE:
340 		if (config < PERF_COUNT_SW_MAX && sw_event_names[config])
341 			return sw_event_names[config];
342 		return "unknown-software";
343 
344 	case PERF_TYPE_TRACEPOINT:
345 		return tracepoint_id_to_name(config);
346 
347 	default:
348 		break;
349 	}
350 
351 	return "unknown";
352 }
353 
354 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
355 {
356 	int i, j;
357 	int n, longest = -1;
358 
359 	for (i = 0; i < size; i++) {
360 		for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
361 			n = strlen(names[i][j]);
362 			if (n > longest && !strncasecmp(*str, names[i][j], n))
363 				longest = n;
364 		}
365 		if (longest > 0) {
366 			*str += longest;
367 			return i;
368 		}
369 	}
370 
371 	return -1;
372 }
373 
374 static enum event_result
375 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
376 {
377 	const char *s = *str;
378 	int cache_type = -1, cache_op = -1, cache_result = -1;
379 
380 	cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
381 	/*
382 	 * No fallback - if we cannot get a clear cache type
383 	 * then bail out:
384 	 */
385 	if (cache_type == -1)
386 		return EVT_FAILED;
387 
388 	while ((cache_op == -1 || cache_result == -1) && *s == '-') {
389 		++s;
390 
391 		if (cache_op == -1) {
392 			cache_op = parse_aliases(&s, hw_cache_op,
393 						PERF_COUNT_HW_CACHE_OP_MAX);
394 			if (cache_op >= 0) {
395 				if (!is_cache_op_valid(cache_type, cache_op))
396 					return 0;
397 				continue;
398 			}
399 		}
400 
401 		if (cache_result == -1) {
402 			cache_result = parse_aliases(&s, hw_cache_result,
403 						PERF_COUNT_HW_CACHE_RESULT_MAX);
404 			if (cache_result >= 0)
405 				continue;
406 		}
407 
408 		/*
409 		 * Can't parse this as a cache op or result, so back up
410 		 * to the '-'.
411 		 */
412 		--s;
413 		break;
414 	}
415 
416 	/*
417 	 * Fall back to reads:
418 	 */
419 	if (cache_op == -1)
420 		cache_op = PERF_COUNT_HW_CACHE_OP_READ;
421 
422 	/*
423 	 * Fall back to accesses:
424 	 */
425 	if (cache_result == -1)
426 		cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
427 
428 	attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
429 	attr->type = PERF_TYPE_HW_CACHE;
430 
431 	*str = s;
432 	return EVT_HANDLED;
433 }
434 
435 static enum event_result
436 parse_single_tracepoint_event(char *sys_name,
437 			      const char *evt_name,
438 			      unsigned int evt_length,
439 			      struct perf_event_attr *attr,
440 			      const char **strp)
441 {
442 	char evt_path[MAXPATHLEN];
443 	char id_buf[4];
444 	u64 id;
445 	int fd;
446 
447 	snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
448 		 sys_name, evt_name);
449 
450 	fd = open(evt_path, O_RDONLY);
451 	if (fd < 0)
452 		return EVT_FAILED;
453 
454 	if (read(fd, id_buf, sizeof(id_buf)) < 0) {
455 		close(fd);
456 		return EVT_FAILED;
457 	}
458 
459 	close(fd);
460 	id = atoll(id_buf);
461 	attr->config = id;
462 	attr->type = PERF_TYPE_TRACEPOINT;
463 	*strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
464 
465 	attr->sample_type |= PERF_SAMPLE_RAW;
466 	attr->sample_type |= PERF_SAMPLE_TIME;
467 	attr->sample_type |= PERF_SAMPLE_CPU;
468 
469 	attr->sample_period = 1;
470 
471 
472 	return EVT_HANDLED;
473 }
474 
475 /* sys + ':' + event + ':' + flags*/
476 #define MAX_EVOPT_LEN	(MAX_EVENT_LENGTH * 2 + 2 + 128)
477 static enum event_result
478 parse_multiple_tracepoint_event(const struct option *opt, char *sys_name,
479 				const char *evt_exp, char *flags)
480 {
481 	char evt_path[MAXPATHLEN];
482 	struct dirent *evt_ent;
483 	DIR *evt_dir;
484 
485 	snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
486 	evt_dir = opendir(evt_path);
487 
488 	if (!evt_dir) {
489 		perror("Can't open event dir");
490 		return EVT_FAILED;
491 	}
492 
493 	while ((evt_ent = readdir(evt_dir))) {
494 		char event_opt[MAX_EVOPT_LEN + 1];
495 		int len;
496 
497 		if (!strcmp(evt_ent->d_name, ".")
498 		    || !strcmp(evt_ent->d_name, "..")
499 		    || !strcmp(evt_ent->d_name, "enable")
500 		    || !strcmp(evt_ent->d_name, "filter"))
501 			continue;
502 
503 		if (!strglobmatch(evt_ent->d_name, evt_exp))
504 			continue;
505 
506 		len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
507 			       evt_ent->d_name, flags ? ":" : "",
508 			       flags ?: "");
509 		if (len < 0)
510 			return EVT_FAILED;
511 
512 		if (parse_events(opt, event_opt, 0))
513 			return EVT_FAILED;
514 	}
515 
516 	return EVT_HANDLED_ALL;
517 }
518 
519 static enum event_result
520 parse_tracepoint_event(const struct option *opt, const char **strp,
521 		       struct perf_event_attr *attr)
522 {
523 	const char *evt_name;
524 	char *flags = NULL, *comma_loc;
525 	char sys_name[MAX_EVENT_LENGTH];
526 	unsigned int sys_length, evt_length;
527 
528 	if (debugfs_valid_mountpoint(debugfs_path))
529 		return 0;
530 
531 	evt_name = strchr(*strp, ':');
532 	if (!evt_name)
533 		return EVT_FAILED;
534 
535 	sys_length = evt_name - *strp;
536 	if (sys_length >= MAX_EVENT_LENGTH)
537 		return 0;
538 
539 	strncpy(sys_name, *strp, sys_length);
540 	sys_name[sys_length] = '\0';
541 	evt_name = evt_name + 1;
542 
543 	comma_loc = strchr(evt_name, ',');
544 	if (comma_loc) {
545 		/* take the event name up to the comma */
546 		evt_name = strndup(evt_name, comma_loc - evt_name);
547 	}
548 	flags = strchr(evt_name, ':');
549 	if (flags) {
550 		/* split it out: */
551 		evt_name = strndup(evt_name, flags - evt_name);
552 		flags++;
553 	}
554 
555 	evt_length = strlen(evt_name);
556 	if (evt_length >= MAX_EVENT_LENGTH)
557 		return EVT_FAILED;
558 	if (strpbrk(evt_name, "*?")) {
559 		*strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
560 		return parse_multiple_tracepoint_event(opt, sys_name, evt_name,
561 						       flags);
562 	} else {
563 		return parse_single_tracepoint_event(sys_name, evt_name,
564 						     evt_length, attr, strp);
565 	}
566 }
567 
568 static enum event_result
569 parse_breakpoint_type(const char *type, const char **strp,
570 		      struct perf_event_attr *attr)
571 {
572 	int i;
573 
574 	for (i = 0; i < 3; i++) {
575 		if (!type[i])
576 			break;
577 
578 		switch (type[i]) {
579 		case 'r':
580 			attr->bp_type |= HW_BREAKPOINT_R;
581 			break;
582 		case 'w':
583 			attr->bp_type |= HW_BREAKPOINT_W;
584 			break;
585 		case 'x':
586 			attr->bp_type |= HW_BREAKPOINT_X;
587 			break;
588 		default:
589 			return EVT_FAILED;
590 		}
591 	}
592 	if (!attr->bp_type) /* Default */
593 		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
594 
595 	*strp = type + i;
596 
597 	return EVT_HANDLED;
598 }
599 
600 static enum event_result
601 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
602 {
603 	const char *target;
604 	const char *type;
605 	char *endaddr;
606 	u64 addr;
607 	enum event_result err;
608 
609 	target = strchr(*strp, ':');
610 	if (!target)
611 		return EVT_FAILED;
612 
613 	if (strncmp(*strp, "mem", target - *strp) != 0)
614 		return EVT_FAILED;
615 
616 	target++;
617 
618 	addr = strtoull(target, &endaddr, 0);
619 	if (target == endaddr)
620 		return EVT_FAILED;
621 
622 	attr->bp_addr = addr;
623 	*strp = endaddr;
624 
625 	type = strchr(target, ':');
626 
627 	/* If no type is defined, just rw as default */
628 	if (!type) {
629 		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
630 	} else {
631 		err = parse_breakpoint_type(++type, strp, attr);
632 		if (err == EVT_FAILED)
633 			return EVT_FAILED;
634 	}
635 
636 	/*
637 	 * We should find a nice way to override the access length
638 	 * Provide some defaults for now
639 	 */
640 	if (attr->bp_type == HW_BREAKPOINT_X)
641 		attr->bp_len = sizeof(long);
642 	else
643 		attr->bp_len = HW_BREAKPOINT_LEN_4;
644 
645 	attr->type = PERF_TYPE_BREAKPOINT;
646 
647 	return EVT_HANDLED;
648 }
649 
650 static int check_events(const char *str, unsigned int i)
651 {
652 	int n;
653 
654 	n = strlen(event_symbols[i].symbol);
655 	if (!strncasecmp(str, event_symbols[i].symbol, n))
656 		return n;
657 
658 	n = strlen(event_symbols[i].alias);
659 	if (n) {
660 		if (!strncasecmp(str, event_symbols[i].alias, n))
661 			return n;
662 	}
663 
664 	return 0;
665 }
666 
667 static enum event_result
668 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
669 {
670 	const char *str = *strp;
671 	unsigned int i;
672 	int n;
673 
674 	for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
675 		n = check_events(str, i);
676 		if (n > 0) {
677 			attr->type = event_symbols[i].type;
678 			attr->config = event_symbols[i].config;
679 			*strp = str + n;
680 			return EVT_HANDLED;
681 		}
682 	}
683 	return EVT_FAILED;
684 }
685 
686 static enum event_result
687 parse_raw_event(const char **strp, struct perf_event_attr *attr)
688 {
689 	const char *str = *strp;
690 	u64 config;
691 	int n;
692 
693 	if (*str != 'r')
694 		return EVT_FAILED;
695 	n = hex2u64(str + 1, &config);
696 	if (n > 0) {
697 		*strp = str + n + 1;
698 		attr->type = PERF_TYPE_RAW;
699 		attr->config = config;
700 		return EVT_HANDLED;
701 	}
702 	return EVT_FAILED;
703 }
704 
705 static enum event_result
706 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
707 {
708 	const char *str = *strp;
709 	char *endp;
710 	unsigned long type;
711 	u64 config;
712 
713 	type = strtoul(str, &endp, 0);
714 	if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
715 		str = endp + 1;
716 		config = strtoul(str, &endp, 0);
717 		if (endp > str) {
718 			attr->type = type;
719 			attr->config = config;
720 			*strp = endp;
721 			return EVT_HANDLED;
722 		}
723 	}
724 	return EVT_FAILED;
725 }
726 
727 static int
728 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
729 {
730 	const char *str = *strp;
731 	int exclude = 0;
732 	int eu = 0, ek = 0, eh = 0, precise = 0;
733 
734 	if (!*str)
735 		return 0;
736 
737 	if (*str == ',')
738 		return 0;
739 
740 	if (*str++ != ':')
741 		return -1;
742 
743 	while (*str) {
744 		if (*str == 'u') {
745 			if (!exclude)
746 				exclude = eu = ek = eh = 1;
747 			eu = 0;
748 		} else if (*str == 'k') {
749 			if (!exclude)
750 				exclude = eu = ek = eh = 1;
751 			ek = 0;
752 		} else if (*str == 'h') {
753 			if (!exclude)
754 				exclude = eu = ek = eh = 1;
755 			eh = 0;
756 		} else if (*str == 'p') {
757 			precise++;
758 		} else
759 			break;
760 
761 		++str;
762 	}
763 	if (str < *strp + 2)
764 		return -1;
765 
766 	*strp = str;
767 
768 	attr->exclude_user   = eu;
769 	attr->exclude_kernel = ek;
770 	attr->exclude_hv     = eh;
771 	attr->precise_ip     = precise;
772 
773 	return 0;
774 }
775 
776 /*
777  * Each event can have multiple symbolic names.
778  * Symbolic names are (almost) exactly matched.
779  */
780 static enum event_result
781 parse_event_symbols(const struct option *opt, const char **str,
782 		    struct perf_event_attr *attr)
783 {
784 	enum event_result ret;
785 
786 	ret = parse_tracepoint_event(opt, str, attr);
787 	if (ret != EVT_FAILED)
788 		goto modifier;
789 
790 	ret = parse_raw_event(str, attr);
791 	if (ret != EVT_FAILED)
792 		goto modifier;
793 
794 	ret = parse_numeric_event(str, attr);
795 	if (ret != EVT_FAILED)
796 		goto modifier;
797 
798 	ret = parse_symbolic_event(str, attr);
799 	if (ret != EVT_FAILED)
800 		goto modifier;
801 
802 	ret = parse_generic_hw_event(str, attr);
803 	if (ret != EVT_FAILED)
804 		goto modifier;
805 
806 	ret = parse_breakpoint_event(str, attr);
807 	if (ret != EVT_FAILED)
808 		goto modifier;
809 
810 	fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
811 	fprintf(stderr, "Run 'perf list' for a list of valid events\n");
812 	return EVT_FAILED;
813 
814 modifier:
815 	if (parse_event_modifier(str, attr) < 0) {
816 		fprintf(stderr, "invalid event modifier: '%s'\n", *str);
817 		fprintf(stderr, "Run 'perf list' for a list of valid events and modifiers\n");
818 
819 		return EVT_FAILED;
820 	}
821 
822 	return ret;
823 }
824 
825 int parse_events(const struct option *opt, const char *str, int unset __used)
826 {
827 	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
828 	struct perf_event_attr attr;
829 	enum event_result ret;
830 	const char *ostr;
831 
832 	for (;;) {
833 		ostr = str;
834 		memset(&attr, 0, sizeof(attr));
835 		ret = parse_event_symbols(opt, &str, &attr);
836 		if (ret == EVT_FAILED)
837 			return -1;
838 
839 		if (!(*str == 0 || *str == ',' || isspace(*str)))
840 			return -1;
841 
842 		if (ret != EVT_HANDLED_ALL) {
843 			struct perf_evsel *evsel;
844 			evsel = perf_evsel__new(&attr, evlist->nr_entries);
845 			if (evsel == NULL)
846 				return -1;
847 			perf_evlist__add(evlist, evsel);
848 
849 			evsel->name = calloc(str - ostr + 1, 1);
850 			if (!evsel->name)
851 				return -1;
852 			strncpy(evsel->name, ostr, str - ostr);
853 		}
854 
855 		if (*str == 0)
856 			break;
857 		if (*str == ',')
858 			++str;
859 		while (isspace(*str))
860 			++str;
861 	}
862 
863 	return 0;
864 }
865 
866 int parse_filter(const struct option *opt, const char *str,
867 		 int unset __used)
868 {
869 	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
870 	struct perf_evsel *last = NULL;
871 
872 	if (evlist->nr_entries > 0)
873 		last = list_entry(evlist->entries.prev, struct perf_evsel, node);
874 
875 	if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
876 		fprintf(stderr,
877 			"-F option should follow a -e tracepoint option\n");
878 		return -1;
879 	}
880 
881 	last->filter = strdup(str);
882 	if (last->filter == NULL) {
883 		fprintf(stderr, "not enough memory to hold filter string\n");
884 		return -1;
885 	}
886 
887 	return 0;
888 }
889 
890 static const char * const event_type_descriptors[] = {
891 	"Hardware event",
892 	"Software event",
893 	"Tracepoint event",
894 	"Hardware cache event",
895 	"Raw hardware event descriptor",
896 	"Hardware breakpoint",
897 };
898 
899 /*
900  * Print the events from <debugfs_mount_point>/tracing/events
901  */
902 
903 void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
904 {
905 	DIR *sys_dir, *evt_dir;
906 	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
907 	char evt_path[MAXPATHLEN];
908 	char dir_path[MAXPATHLEN];
909 
910 	if (debugfs_valid_mountpoint(debugfs_path))
911 		return;
912 
913 	sys_dir = opendir(debugfs_path);
914 	if (!sys_dir)
915 		return;
916 
917 	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
918 		if (subsys_glob != NULL &&
919 		    !strglobmatch(sys_dirent.d_name, subsys_glob))
920 			continue;
921 
922 		snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
923 			 sys_dirent.d_name);
924 		evt_dir = opendir(dir_path);
925 		if (!evt_dir)
926 			continue;
927 
928 		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
929 			if (event_glob != NULL &&
930 			    !strglobmatch(evt_dirent.d_name, event_glob))
931 				continue;
932 
933 			snprintf(evt_path, MAXPATHLEN, "%s:%s",
934 				 sys_dirent.d_name, evt_dirent.d_name);
935 			printf("  %-50s [%s]\n", evt_path,
936 				event_type_descriptors[PERF_TYPE_TRACEPOINT]);
937 		}
938 		closedir(evt_dir);
939 	}
940 	closedir(sys_dir);
941 }
942 
943 /*
944  * Check whether event is in <debugfs_mount_point>/tracing/events
945  */
946 
947 int is_valid_tracepoint(const char *event_string)
948 {
949 	DIR *sys_dir, *evt_dir;
950 	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
951 	char evt_path[MAXPATHLEN];
952 	char dir_path[MAXPATHLEN];
953 
954 	if (debugfs_valid_mountpoint(debugfs_path))
955 		return 0;
956 
957 	sys_dir = opendir(debugfs_path);
958 	if (!sys_dir)
959 		return 0;
960 
961 	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
962 
963 		snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
964 			 sys_dirent.d_name);
965 		evt_dir = opendir(dir_path);
966 		if (!evt_dir)
967 			continue;
968 
969 		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
970 			snprintf(evt_path, MAXPATHLEN, "%s:%s",
971 				 sys_dirent.d_name, evt_dirent.d_name);
972 			if (!strcmp(evt_path, event_string)) {
973 				closedir(evt_dir);
974 				closedir(sys_dir);
975 				return 1;
976 			}
977 		}
978 		closedir(evt_dir);
979 	}
980 	closedir(sys_dir);
981 	return 0;
982 }
983 
984 void print_events_type(u8 type)
985 {
986 	struct event_symbol *syms = event_symbols;
987 	unsigned int i;
988 	char name[64];
989 
990 	for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
991 		if (type != syms->type)
992 			continue;
993 
994 		if (strlen(syms->alias))
995 			snprintf(name, sizeof(name),  "%s OR %s",
996 				 syms->symbol, syms->alias);
997 		else
998 			snprintf(name, sizeof(name), "%s", syms->symbol);
999 
1000 		printf("  %-50s [%s]\n", name,
1001 			event_type_descriptors[type]);
1002 	}
1003 }
1004 
1005 int print_hwcache_events(const char *event_glob)
1006 {
1007 	unsigned int type, op, i, printed = 0;
1008 
1009 	for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1010 		for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1011 			/* skip invalid cache type */
1012 			if (!is_cache_op_valid(type, op))
1013 				continue;
1014 
1015 			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1016 				char *name = event_cache_name(type, op, i);
1017 
1018 				if (event_glob != NULL && !strglobmatch(name, event_glob))
1019 					continue;
1020 
1021 				printf("  %-50s [%s]\n", name,
1022 					event_type_descriptors[PERF_TYPE_HW_CACHE]);
1023 				++printed;
1024 			}
1025 		}
1026 	}
1027 
1028 	return printed;
1029 }
1030 
1031 #define MAX_NAME_LEN 100
1032 
1033 /*
1034  * Print the help text for the event symbols:
1035  */
1036 void print_events(const char *event_glob)
1037 {
1038 	unsigned int i, type, prev_type = -1, printed = 0, ntypes_printed = 0;
1039 	struct event_symbol *syms = event_symbols;
1040 	char name[MAX_NAME_LEN];
1041 
1042 	printf("\n");
1043 	printf("List of pre-defined events (to be used in -e):\n");
1044 
1045 	for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1046 		type = syms->type;
1047 
1048 		if (type != prev_type && printed) {
1049 			printf("\n");
1050 			printed = 0;
1051 			ntypes_printed++;
1052 		}
1053 
1054 		if (event_glob != NULL &&
1055 		    !(strglobmatch(syms->symbol, event_glob) ||
1056 		      (syms->alias && strglobmatch(syms->alias, event_glob))))
1057 			continue;
1058 
1059 		if (strlen(syms->alias))
1060 			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1061 		else
1062 			strncpy(name, syms->symbol, MAX_NAME_LEN);
1063 		printf("  %-50s [%s]\n", name,
1064 			event_type_descriptors[type]);
1065 
1066 		prev_type = type;
1067 		++printed;
1068 	}
1069 
1070 	if (ntypes_printed) {
1071 		printed = 0;
1072 		printf("\n");
1073 	}
1074 	print_hwcache_events(event_glob);
1075 
1076 	if (event_glob != NULL)
1077 		return;
1078 
1079 	printf("\n");
1080 	printf("  %-50s [%s]\n",
1081 		"rNNN (see 'perf list --help' on how to encode it)",
1082 	       event_type_descriptors[PERF_TYPE_RAW]);
1083 	printf("\n");
1084 
1085 	printf("  %-50s [%s]\n",
1086 			"mem:<addr>[:access]",
1087 			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1088 	printf("\n");
1089 
1090 	print_tracepoint_events(NULL, NULL);
1091 
1092 	exit(129);
1093 }
1094