parse-events.c revision e6817ec1d8ab31fc7b01906e305f848542df6413 
1/* ANDROID_CHANGE_BEGIN */
2#if 0
3#include "../../../include/linux/hw_breakpoint.h"
4#else
5#include "include/linux/added/hw_breakpoint.h"
6#endif
7/* ANDROID_CHANGE_END */
8#include "util.h"
9#include "../perf.h"
10#include "evlist.h"
11#include "evsel.h"
12#include "parse-options.h"
13#include "parse-events.h"
14#include "exec_cmd.h"
15#include "string.h"
16#include "symbol.h"
17#include "cache.h"
18#include "header.h"
19#include "debugfs.h"
20
21struct event_symbol {
22	u8		type;
23	u64		config;
24	const char	*symbol;
25	const char	*alias;
26};
27
28enum event_result {
29	EVT_FAILED,
30	EVT_HANDLED,
31	EVT_HANDLED_ALL
32};
33
34char debugfs_path[MAXPATHLEN];
35
36#define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
37#define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
38
39static struct event_symbol event_symbols[] = {
40  { CHW(CPU_CYCLES),			"cpu-cycles",			"cycles"		},
41  { CHW(STALLED_CYCLES_FRONTEND),	"stalled-cycles-frontend",	"idle-cycles-frontend"	},
42  { CHW(STALLED_CYCLES_BACKEND),	"stalled-cycles-backend",	"idle-cycles-backend"	},
43  { CHW(INSTRUCTIONS),			"instructions",			""			},
44  { CHW(CACHE_REFERENCES),		"cache-references",		""			},
45  { CHW(CACHE_MISSES),			"cache-misses",			""			},
46  { CHW(BRANCH_INSTRUCTIONS),		"branch-instructions",		"branches"		},
47  { CHW(BRANCH_MISSES),			"branch-misses",		""			},
48  { CHW(BUS_CYCLES),			"bus-cycles",			""			},
49
50  { CSW(CPU_CLOCK),			"cpu-clock",			""			},
51  { CSW(TASK_CLOCK),			"task-clock",			""			},
52  { CSW(PAGE_FAULTS),			"page-faults",			"faults"		},
53  { CSW(PAGE_FAULTS_MIN),		"minor-faults",			""			},
54  { CSW(PAGE_FAULTS_MAJ),		"major-faults",			""			},
55  { CSW(CONTEXT_SWITCHES),		"context-switches",		"cs"			},
56  { CSW(CPU_MIGRATIONS),		"cpu-migrations",		"migrations"		},
57  { CSW(ALIGNMENT_FAULTS),		"alignment-faults",		""			},
58  { CSW(EMULATION_FAULTS),		"emulation-faults",		""			},
59};
60
61#define __PERF_EVENT_FIELD(config, name) \
62	((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
63
64#define PERF_EVENT_RAW(config)		__PERF_EVENT_FIELD(config, RAW)
65#define PERF_EVENT_CONFIG(config)	__PERF_EVENT_FIELD(config, CONFIG)
66#define PERF_EVENT_TYPE(config)		__PERF_EVENT_FIELD(config, TYPE)
67#define PERF_EVENT_ID(config)		__PERF_EVENT_FIELD(config, EVENT)
68
69static const char *hw_event_names[PERF_COUNT_HW_MAX] = {
70	"cycles",
71	"instructions",
72	"cache-references",
73	"cache-misses",
74	"branches",
75	"branch-misses",
76	"bus-cycles",
77	"stalled-cycles-frontend",
78	"stalled-cycles-backend",
79};
80
81static const char *sw_event_names[PERF_COUNT_SW_MAX] = {
82	"cpu-clock",
83	"task-clock",
84	"page-faults",
85	"context-switches",
86	"CPU-migrations",
87	"minor-faults",
88	"major-faults",
89	"alignment-faults",
90	"emulation-faults",
91};
92
93#define MAX_ALIASES 8
94
95static const char *hw_cache[][MAX_ALIASES] = {
96 { "L1-dcache",	"l1-d",		"l1d",		"L1-data",		},
97 { "L1-icache",	"l1-i",		"l1i",		"L1-instruction",	},
98 { "LLC",	"L2"							},
99 { "dTLB",	"d-tlb",	"Data-TLB",				},
100 { "iTLB",	"i-tlb",	"Instruction-TLB",			},
101 { "branch",	"branches",	"bpu",		"btb",		"bpc",	},
102};
103
104static const char *hw_cache_op[][MAX_ALIASES] = {
105 { "load",	"loads",	"read",					},
106 { "store",	"stores",	"write",				},
107 { "prefetch",	"prefetches",	"speculative-read", "speculative-load",	},
108};
109
110static const char *hw_cache_result[][MAX_ALIASES] = {
111 { "refs",	"Reference",	"ops",		"access",		},
112 { "misses",	"miss",							},
113};
114
115#define C(x)		PERF_COUNT_HW_CACHE_##x
116#define CACHE_READ	(1 << C(OP_READ))
117#define CACHE_WRITE	(1 << C(OP_WRITE))
118#define CACHE_PREFETCH	(1 << C(OP_PREFETCH))
119#define COP(x)		(1 << x)
120
121/*
122 * cache operartion stat
123 * L1I : Read and prefetch only
124 * ITLB and BPU : Read-only
125 */
126static unsigned long hw_cache_stat[C(MAX)] = {
127 [C(L1D)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
128 [C(L1I)]	= (CACHE_READ | CACHE_PREFETCH),
129 [C(LL)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
130 [C(DTLB)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
131 [C(ITLB)]	= (CACHE_READ),
132 [C(BPU)]	= (CACHE_READ),
133};
134
135#define for_each_subsystem(sys_dir, sys_dirent, sys_next)	       \
136	while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)	       \
137	if (sys_dirent.d_type == DT_DIR &&				       \
138	   (strcmp(sys_dirent.d_name, ".")) &&				       \
139	   (strcmp(sys_dirent.d_name, "..")))
140
141static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
142{
143	char evt_path[MAXPATHLEN];
144	int fd;
145
146	snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
147			sys_dir->d_name, evt_dir->d_name);
148	fd = open(evt_path, O_RDONLY);
149	if (fd < 0)
150		return -EINVAL;
151	close(fd);
152
153	return 0;
154}
155
156#define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)	       \
157	while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
158	if (evt_dirent.d_type == DT_DIR &&				       \
159	   (strcmp(evt_dirent.d_name, ".")) &&				       \
160	   (strcmp(evt_dirent.d_name, "..")) &&				       \
161	   (!tp_event_has_id(&sys_dirent, &evt_dirent)))
162
163#define MAX_EVENT_LENGTH 512
164
165
166struct tracepoint_path *tracepoint_id_to_path(u64 config)
167{
168	struct tracepoint_path *path = NULL;
169	DIR *sys_dir, *evt_dir;
170	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
171	char id_buf[4];
172	int fd;
173	u64 id;
174	char evt_path[MAXPATHLEN];
175	char dir_path[MAXPATHLEN];
176
177	if (debugfs_valid_mountpoint(debugfs_path))
178		return NULL;
179
180	sys_dir = opendir(debugfs_path);
181	if (!sys_dir)
182		return NULL;
183
184	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
185
186		snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
187			 sys_dirent.d_name);
188		evt_dir = opendir(dir_path);
189		if (!evt_dir)
190			continue;
191
192		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
193
194			snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
195				 evt_dirent.d_name);
196			fd = open(evt_path, O_RDONLY);
197			if (fd < 0)
198				continue;
199			if (read(fd, id_buf, sizeof(id_buf)) < 0) {
200				close(fd);
201				continue;
202			}
203			close(fd);
204			id = atoll(id_buf);
205			if (id == config) {
206				closedir(evt_dir);
207				closedir(sys_dir);
208				path = zalloc(sizeof(*path));
209				path->system = malloc(MAX_EVENT_LENGTH);
210				if (!path->system) {
211					free(path);
212					return NULL;
213				}
214				path->name = malloc(MAX_EVENT_LENGTH);
215				if (!path->name) {
216					free(path->system);
217					free(path);
218					return NULL;
219				}
220				strncpy(path->system, sys_dirent.d_name,
221					MAX_EVENT_LENGTH);
222				strncpy(path->name, evt_dirent.d_name,
223					MAX_EVENT_LENGTH);
224				return path;
225			}
226		}
227		closedir(evt_dir);
228	}
229
230	closedir(sys_dir);
231	return NULL;
232}
233
234#define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
235static const char *tracepoint_id_to_name(u64 config)
236{
237	static char buf[TP_PATH_LEN];
238	struct tracepoint_path *path;
239
240	path = tracepoint_id_to_path(config);
241	if (path) {
242		snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
243		free(path->name);
244		free(path->system);
245		free(path);
246	} else
247		snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
248
249	return buf;
250}
251
252static int is_cache_op_valid(u8 cache_type, u8 cache_op)
253{
254	if (hw_cache_stat[cache_type] & COP(cache_op))
255		return 1;	/* valid */
256	else
257		return 0;	/* invalid */
258}
259
260static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
261{
262	static char name[50];
263
264	if (cache_result) {
265		sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
266			hw_cache_op[cache_op][0],
267			hw_cache_result[cache_result][0]);
268	} else {
269		sprintf(name, "%s-%s", hw_cache[cache_type][0],
270			hw_cache_op[cache_op][1]);
271	}
272
273	return name;
274}
275
276const char *event_type(int type)
277{
278	switch (type) {
279	case PERF_TYPE_HARDWARE:
280		return "hardware";
281
282	case PERF_TYPE_SOFTWARE:
283		return "software";
284
285	case PERF_TYPE_TRACEPOINT:
286		return "tracepoint";
287
288	case PERF_TYPE_HW_CACHE:
289		return "hardware-cache";
290
291	default:
292		break;
293	}
294
295	return "unknown";
296}
297
298const char *event_name(struct perf_evsel *evsel)
299{
300	u64 config = evsel->attr.config;
301	int type = evsel->attr.type;
302
303	if (evsel->name)
304		return evsel->name;
305
306	return __event_name(type, config);
307}
308
309const char *__event_name(int type, u64 config)
310{
311	static char buf[32];
312
313	if (type == PERF_TYPE_RAW) {
314		sprintf(buf, "raw 0x%" PRIx64, config);
315		return buf;
316	}
317
318	switch (type) {
319	case PERF_TYPE_HARDWARE:
320		if (config < PERF_COUNT_HW_MAX && hw_event_names[config])
321			return hw_event_names[config];
322		return "unknown-hardware";
323
324	case PERF_TYPE_HW_CACHE: {
325		u8 cache_type, cache_op, cache_result;
326
327		cache_type   = (config >>  0) & 0xff;
328		if (cache_type > PERF_COUNT_HW_CACHE_MAX)
329			return "unknown-ext-hardware-cache-type";
330
331		cache_op     = (config >>  8) & 0xff;
332		if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
333			return "unknown-ext-hardware-cache-op";
334
335		cache_result = (config >> 16) & 0xff;
336		if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
337			return "unknown-ext-hardware-cache-result";
338
339		if (!is_cache_op_valid(cache_type, cache_op))
340			return "invalid-cache";
341
342		return event_cache_name(cache_type, cache_op, cache_result);
343	}
344
345	case PERF_TYPE_SOFTWARE:
346		if (config < PERF_COUNT_SW_MAX && sw_event_names[config])
347			return sw_event_names[config];
348		return "unknown-software";
349
350	case PERF_TYPE_TRACEPOINT:
351		return tracepoint_id_to_name(config);
352
353	default:
354		break;
355	}
356
357	return "unknown";
358}
359
360static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
361{
362	int i, j;
363	int n, longest = -1;
364
365	for (i = 0; i < size; i++) {
366		for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
367			n = strlen(names[i][j]);
368			if (n > longest && !strncasecmp(*str, names[i][j], n))
369				longest = n;
370		}
371		if (longest > 0) {
372			*str += longest;
373			return i;
374		}
375	}
376
377	return -1;
378}
379
380static enum event_result
381parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
382{
383	const char *s = *str;
384	int cache_type = -1, cache_op = -1, cache_result = -1;
385
386	cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
387	/*
388	 * No fallback - if we cannot get a clear cache type
389	 * then bail out:
390	 */
391	if (cache_type == -1)
392		return EVT_FAILED;
393
394	while ((cache_op == -1 || cache_result == -1) && *s == '-') {
395		++s;
396
397		if (cache_op == -1) {
398			cache_op = parse_aliases(&s, hw_cache_op,
399						PERF_COUNT_HW_CACHE_OP_MAX);
400			if (cache_op >= 0) {
401				if (!is_cache_op_valid(cache_type, cache_op))
402					return 0;
403				continue;
404			}
405		}
406
407		if (cache_result == -1) {
408			cache_result = parse_aliases(&s, hw_cache_result,
409						PERF_COUNT_HW_CACHE_RESULT_MAX);
410			if (cache_result >= 0)
411				continue;
412		}
413
414		/*
415		 * Can't parse this as a cache op or result, so back up
416		 * to the '-'.
417		 */
418		--s;
419		break;
420	}
421
422	/*
423	 * Fall back to reads:
424	 */
425	if (cache_op == -1)
426		cache_op = PERF_COUNT_HW_CACHE_OP_READ;
427
428	/*
429	 * Fall back to accesses:
430	 */
431	if (cache_result == -1)
432		cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
433
434	attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
435	attr->type = PERF_TYPE_HW_CACHE;
436
437	*str = s;
438	return EVT_HANDLED;
439}
440
441static enum event_result
442parse_single_tracepoint_event(char *sys_name,
443			      const char *evt_name,
444			      unsigned int evt_length,
445			      struct perf_event_attr *attr,
446			      const char **strp)
447{
448	char evt_path[MAXPATHLEN];
449	char id_buf[4];
450	u64 id;
451	int fd;
452
453	snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
454		 sys_name, evt_name);
455
456	fd = open(evt_path, O_RDONLY);
457	if (fd < 0)
458		return EVT_FAILED;
459
460	if (read(fd, id_buf, sizeof(id_buf)) < 0) {
461		close(fd);
462		return EVT_FAILED;
463	}
464
465	close(fd);
466	id = atoll(id_buf);
467	attr->config = id;
468	attr->type = PERF_TYPE_TRACEPOINT;
469	*strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
470
471	attr->sample_type |= PERF_SAMPLE_RAW;
472	attr->sample_type |= PERF_SAMPLE_TIME;
473	attr->sample_type |= PERF_SAMPLE_CPU;
474
475	attr->sample_period = 1;
476
477
478	return EVT_HANDLED;
479}
480
481/* sys + ':' + event + ':' + flags*/
482#define MAX_EVOPT_LEN	(MAX_EVENT_LENGTH * 2 + 2 + 128)
483static enum event_result
484parse_multiple_tracepoint_event(const struct option *opt, char *sys_name,
485				const char *evt_exp, char *flags)
486{
487	char evt_path[MAXPATHLEN];
488	struct dirent *evt_ent;
489	DIR *evt_dir;
490
491	snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
492	evt_dir = opendir(evt_path);
493
494	if (!evt_dir) {
495		perror("Can't open event dir");
496		return EVT_FAILED;
497	}
498
499	while ((evt_ent = readdir(evt_dir))) {
500		char event_opt[MAX_EVOPT_LEN + 1];
501		int len;
502
503		if (!strcmp(evt_ent->d_name, ".")
504		    || !strcmp(evt_ent->d_name, "..")
505		    || !strcmp(evt_ent->d_name, "enable")
506		    || !strcmp(evt_ent->d_name, "filter"))
507			continue;
508
509		if (!strglobmatch(evt_ent->d_name, evt_exp))
510			continue;
511
512		len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
513			       evt_ent->d_name, flags ? ":" : "",
514			       flags ?: "");
515		if (len < 0)
516			return EVT_FAILED;
517
518		if (parse_events(opt, event_opt, 0))
519			return EVT_FAILED;
520	}
521
522	return EVT_HANDLED_ALL;
523}
524
525static enum event_result
526parse_tracepoint_event(const struct option *opt, const char **strp,
527		       struct perf_event_attr *attr)
528{
529	const char *evt_name;
530	char *flags = NULL, *comma_loc;
531	char sys_name[MAX_EVENT_LENGTH];
532	unsigned int sys_length, evt_length;
533
534	if (debugfs_valid_mountpoint(debugfs_path))
535		return 0;
536
537	evt_name = strchr(*strp, ':');
538	if (!evt_name)
539		return EVT_FAILED;
540
541	sys_length = evt_name - *strp;
542	if (sys_length >= MAX_EVENT_LENGTH)
543		return 0;
544
545	strncpy(sys_name, *strp, sys_length);
546	sys_name[sys_length] = '\0';
547	evt_name = evt_name + 1;
548
549	comma_loc = strchr(evt_name, ',');
550	if (comma_loc) {
551		/* take the event name up to the comma */
552		evt_name = strndup(evt_name, comma_loc - evt_name);
553	}
554	flags = strchr(evt_name, ':');
555	if (flags) {
556		/* split it out: */
557		evt_name = strndup(evt_name, flags - evt_name);
558		flags++;
559	}
560
561	evt_length = strlen(evt_name);
562	if (evt_length >= MAX_EVENT_LENGTH)
563		return EVT_FAILED;
564	if (strpbrk(evt_name, "*?")) {
565		*strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
566		return parse_multiple_tracepoint_event(opt, sys_name, evt_name,
567						       flags);
568	} else {
569		return parse_single_tracepoint_event(sys_name, evt_name,
570						     evt_length, attr, strp);
571	}
572}
573
574static enum event_result
575parse_breakpoint_type(const char *type, const char **strp,
576		      struct perf_event_attr *attr)
577{
578	int i;
579
580	for (i = 0; i < 3; i++) {
581		if (!type[i])
582			break;
583
584		switch (type[i]) {
585		case 'r':
586			attr->bp_type |= HW_BREAKPOINT_R;
587			break;
588		case 'w':
589			attr->bp_type |= HW_BREAKPOINT_W;
590			break;
591		case 'x':
592			attr->bp_type |= HW_BREAKPOINT_X;
593			break;
594		default:
595			return EVT_FAILED;
596		}
597	}
598	if (!attr->bp_type) /* Default */
599		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
600
601	*strp = type + i;
602
603	return EVT_HANDLED;
604}
605
606static enum event_result
607parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
608{
609	const char *target;
610	const char *type;
611	char *endaddr;
612	u64 addr;
613	enum event_result err;
614
615	target = strchr(*strp, ':');
616	if (!target)
617		return EVT_FAILED;
618
619	if (strncmp(*strp, "mem", target - *strp) != 0)
620		return EVT_FAILED;
621
622	target++;
623
624	addr = strtoull(target, &endaddr, 0);
625	if (target == endaddr)
626		return EVT_FAILED;
627
628	attr->bp_addr = addr;
629	*strp = endaddr;
630
631	type = strchr(target, ':');
632
633	/* If no type is defined, just rw as default */
634	if (!type) {
635		attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
636	} else {
637		err = parse_breakpoint_type(++type, strp, attr);
638		if (err == EVT_FAILED)
639			return EVT_FAILED;
640	}
641
642	/*
643	 * We should find a nice way to override the access length
644	 * Provide some defaults for now
645	 */
646	if (attr->bp_type == HW_BREAKPOINT_X)
647		attr->bp_len = sizeof(long);
648	else
649		attr->bp_len = HW_BREAKPOINT_LEN_4;
650
651	attr->type = PERF_TYPE_BREAKPOINT;
652
653	return EVT_HANDLED;
654}
655
656static int check_events(const char *str, unsigned int i)
657{
658	int n;
659
660	n = strlen(event_symbols[i].symbol);
661	if (!strncasecmp(str, event_symbols[i].symbol, n))
662		return n;
663
664	n = strlen(event_symbols[i].alias);
665	if (n) {
666		if (!strncasecmp(str, event_symbols[i].alias, n))
667			return n;
668	}
669
670	return 0;
671}
672
673static enum event_result
674parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
675{
676	const char *str = *strp;
677	unsigned int i;
678	int n;
679
680	for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
681		n = check_events(str, i);
682		if (n > 0) {
683			attr->type = event_symbols[i].type;
684			attr->config = event_symbols[i].config;
685			*strp = str + n;
686			return EVT_HANDLED;
687		}
688	}
689	return EVT_FAILED;
690}
691
692static enum event_result
693parse_raw_event(const char **strp, struct perf_event_attr *attr)
694{
695	const char *str = *strp;
696	u64 config;
697	int n;
698
699	if (*str != 'r')
700		return EVT_FAILED;
701	n = hex2u64(str + 1, &config);
702	if (n > 0) {
703		*strp = str + n + 1;
704		attr->type = PERF_TYPE_RAW;
705		attr->config = config;
706		return EVT_HANDLED;
707	}
708	return EVT_FAILED;
709}
710
711static enum event_result
712parse_numeric_event(const char **strp, struct perf_event_attr *attr)
713{
714	const char *str = *strp;
715	char *endp;
716	unsigned long type;
717	u64 config;
718
719	type = strtoul(str, &endp, 0);
720	if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
721		str = endp + 1;
722		config = strtoul(str, &endp, 0);
723		if (endp > str) {
724			attr->type = type;
725			attr->config = config;
726			*strp = endp;
727			return EVT_HANDLED;
728		}
729	}
730	return EVT_FAILED;
731}
732
733static int
734parse_event_modifier(const char **strp, struct perf_event_attr *attr)
735{
736	const char *str = *strp;
737	int exclude = 0;
738	int eu = 0, ek = 0, eh = 0, precise = 0;
739
740	if (!*str)
741		return 0;
742
743	if (*str == ',')
744		return 0;
745
746	if (*str++ != ':')
747		return -1;
748
749	while (*str) {
750		if (*str == 'u') {
751			if (!exclude)
752				exclude = eu = ek = eh = 1;
753			eu = 0;
754		} else if (*str == 'k') {
755			if (!exclude)
756				exclude = eu = ek = eh = 1;
757			ek = 0;
758		} else if (*str == 'h') {
759			if (!exclude)
760				exclude = eu = ek = eh = 1;
761			eh = 0;
762		} else if (*str == 'p') {
763			precise++;
764		} else
765			break;
766
767		++str;
768	}
769	if (str < *strp + 2)
770		return -1;
771
772	*strp = str;
773
774	attr->exclude_user   = eu;
775	attr->exclude_kernel = ek;
776	attr->exclude_hv     = eh;
777	attr->precise_ip     = precise;
778
779	return 0;
780}
781
782/*
783 * Each event can have multiple symbolic names.
784 * Symbolic names are (almost) exactly matched.
785 */
786static enum event_result
787parse_event_symbols(const struct option *opt, const char **str,
788		    struct perf_event_attr *attr)
789{
790	enum event_result ret;
791
792	ret = parse_tracepoint_event(opt, str, attr);
793	if (ret != EVT_FAILED)
794		goto modifier;
795
796	ret = parse_raw_event(str, attr);
797	if (ret != EVT_FAILED)
798		goto modifier;
799
800	ret = parse_numeric_event(str, attr);
801	if (ret != EVT_FAILED)
802		goto modifier;
803
804	ret = parse_symbolic_event(str, attr);
805	if (ret != EVT_FAILED)
806		goto modifier;
807
808	ret = parse_generic_hw_event(str, attr);
809	if (ret != EVT_FAILED)
810		goto modifier;
811
812	ret = parse_breakpoint_event(str, attr);
813	if (ret != EVT_FAILED)
814		goto modifier;
815
816	fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
817	fprintf(stderr, "Run 'perf list' for a list of valid events\n");
818	return EVT_FAILED;
819
820modifier:
821	if (parse_event_modifier(str, attr) < 0) {
822		fprintf(stderr, "invalid event modifier: '%s'\n", *str);
823		fprintf(stderr, "Run 'perf list' for a list of valid events and modifiers\n");
824
825		return EVT_FAILED;
826	}
827
828	return ret;
829}
830
831int parse_events(const struct option *opt, const char *str, int unset __used)
832{
833	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
834	struct perf_event_attr attr;
835	enum event_result ret;
836	const char *ostr;
837
838	for (;;) {
839		ostr = str;
840		memset(&attr, 0, sizeof(attr));
841		ret = parse_event_symbols(opt, &str, &attr);
842		if (ret == EVT_FAILED)
843			return -1;
844
845		if (!(*str == 0 || *str == ',' || isspace(*str)))
846			return -1;
847
848		if (ret != EVT_HANDLED_ALL) {
849			struct perf_evsel *evsel;
850			evsel = perf_evsel__new(&attr, evlist->nr_entries);
851			if (evsel == NULL)
852				return -1;
853			perf_evlist__add(evlist, evsel);
854
855			evsel->name = calloc(str - ostr + 1, 1);
856			if (!evsel->name)
857				return -1;
858			strncpy(evsel->name, ostr, str - ostr);
859		}
860
861		if (*str == 0)
862			break;
863		if (*str == ',')
864			++str;
865		while (isspace(*str))
866			++str;
867	}
868
869	return 0;
870}
871
872int parse_filter(const struct option *opt, const char *str,
873		 int unset __used)
874{
875	struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
876	struct perf_evsel *last = NULL;
877
878	if (evlist->nr_entries > 0)
879		last = list_entry(evlist->entries.prev, struct perf_evsel, node);
880
881	if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
882		fprintf(stderr,
883			"-F option should follow a -e tracepoint option\n");
884		return -1;
885	}
886
887	last->filter = strdup(str);
888	if (last->filter == NULL) {
889		fprintf(stderr, "not enough memory to hold filter string\n");
890		return -1;
891	}
892
893	return 0;
894}
895
896static const char * const event_type_descriptors[] = {
897	"Hardware event",
898	"Software event",
899	"Tracepoint event",
900	"Hardware cache event",
901	"Raw hardware event descriptor",
902	"Hardware breakpoint",
903};
904
905/*
906 * Print the events from <debugfs_mount_point>/tracing/events
907 */
908
909void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
910{
911	DIR *sys_dir, *evt_dir;
912	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
913	char evt_path[MAXPATHLEN];
914	char dir_path[MAXPATHLEN];
915
916	if (debugfs_valid_mountpoint(debugfs_path))
917		return;
918
919	sys_dir = opendir(debugfs_path);
920	if (!sys_dir)
921		return;
922
923	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
924		if (subsys_glob != NULL &&
925		    !strglobmatch(sys_dirent.d_name, subsys_glob))
926			continue;
927
928		snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
929			 sys_dirent.d_name);
930		evt_dir = opendir(dir_path);
931		if (!evt_dir)
932			continue;
933
934		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
935			if (event_glob != NULL &&
936			    !strglobmatch(evt_dirent.d_name, event_glob))
937				continue;
938
939			snprintf(evt_path, MAXPATHLEN, "%s:%s",
940				 sys_dirent.d_name, evt_dirent.d_name);
941			printf("  %-50s [%s]\n", evt_path,
942				event_type_descriptors[PERF_TYPE_TRACEPOINT]);
943		}
944		closedir(evt_dir);
945	}
946	closedir(sys_dir);
947}
948
949/*
950 * Check whether event is in <debugfs_mount_point>/tracing/events
951 */
952
953int is_valid_tracepoint(const char *event_string)
954{
955	DIR *sys_dir, *evt_dir;
956	struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
957	char evt_path[MAXPATHLEN];
958	char dir_path[MAXPATHLEN];
959
960	if (debugfs_valid_mountpoint(debugfs_path))
961		return 0;
962
963	sys_dir = opendir(debugfs_path);
964	if (!sys_dir)
965		return 0;
966
967	for_each_subsystem(sys_dir, sys_dirent, sys_next) {
968
969		snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
970			 sys_dirent.d_name);
971		evt_dir = opendir(dir_path);
972		if (!evt_dir)
973			continue;
974
975		for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
976			snprintf(evt_path, MAXPATHLEN, "%s:%s",
977				 sys_dirent.d_name, evt_dirent.d_name);
978			if (!strcmp(evt_path, event_string)) {
979				closedir(evt_dir);
980				closedir(sys_dir);
981				return 1;
982			}
983		}
984		closedir(evt_dir);
985	}
986	closedir(sys_dir);
987	return 0;
988}
989
990void print_events_type(u8 type)
991{
992	struct event_symbol *syms = event_symbols;
993	unsigned int i;
994	char name[64];
995
996	for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
997		if (type != syms->type)
998			continue;
999
1000		if (strlen(syms->alias))
1001			snprintf(name, sizeof(name),  "%s OR %s",
1002				 syms->symbol, syms->alias);
1003		else
1004			snprintf(name, sizeof(name), "%s", syms->symbol);
1005
1006		printf("  %-50s [%s]\n", name,
1007			event_type_descriptors[type]);
1008	}
1009}
1010
1011int print_hwcache_events(const char *event_glob)
1012{
1013	unsigned int type, op, i, printed = 0;
1014
1015	for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1016		for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1017			/* skip invalid cache type */
1018			if (!is_cache_op_valid(type, op))
1019				continue;
1020
1021			for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1022				char *name = event_cache_name(type, op, i);
1023
1024				if (event_glob != NULL && !strglobmatch(name, event_glob))
1025					continue;
1026
1027				printf("  %-50s [%s]\n", name,
1028					event_type_descriptors[PERF_TYPE_HW_CACHE]);
1029				++printed;
1030			}
1031		}
1032	}
1033
1034	return printed;
1035}
1036
1037#define MAX_NAME_LEN 100
1038
1039/*
1040 * Print the help text for the event symbols:
1041 */
1042void print_events(const char *event_glob)
1043{
1044	unsigned int i, type, prev_type = -1, printed = 0, ntypes_printed = 0;
1045	struct event_symbol *syms = event_symbols;
1046	char name[MAX_NAME_LEN];
1047
1048	printf("\n");
1049	printf("List of pre-defined events (to be used in -e):\n");
1050
1051	for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1052		type = syms->type;
1053
1054		if (type != prev_type && printed) {
1055			printf("\n");
1056			printed = 0;
1057			ntypes_printed++;
1058		}
1059
1060		if (event_glob != NULL &&
1061		    !(strglobmatch(syms->symbol, event_glob) ||
1062		      (syms->alias && strglobmatch(syms->alias, event_glob))))
1063			continue;
1064
1065		if (strlen(syms->alias))
1066			snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1067		else
1068			strncpy(name, syms->symbol, MAX_NAME_LEN);
1069		printf("  %-50s [%s]\n", name,
1070			event_type_descriptors[type]);
1071
1072		prev_type = type;
1073		++printed;
1074	}
1075
1076	if (ntypes_printed) {
1077		printed = 0;
1078		printf("\n");
1079	}
1080	print_hwcache_events(event_glob);
1081
1082	if (event_glob != NULL)
1083		return;
1084
1085	printf("\n");
1086	printf("  %-50s [%s]\n",
1087		"rNNN (see 'perf list --help' on how to encode it)",
1088	       event_type_descriptors[PERF_TYPE_RAW]);
1089	printf("\n");
1090
1091	printf("  %-50s [%s]\n",
1092			"mem:<addr>[:access]",
1093			event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1094	printf("\n");
1095
1096	print_tracepoint_events(NULL, NULL);
1097
1098	exit(129);
1099}
1100