perf: Make the trace events sample period default to 1
[linux-2.6.git] / tools / perf / util / parse-events.c
1 #include "../../../include/linux/hw_breakpoint.h"
2 #include "util.h"
3 #include "../perf.h"
4 #include "parse-options.h"
5 #include "parse-events.h"
6 #include "exec_cmd.h"
7 #include "string.h"
8 #include "symbol.h"
9 #include "cache.h"
10 #include "header.h"
11 #include "debugfs.h"
12
13 int                             nr_counters;
14
15 struct perf_event_attr          attrs[MAX_COUNTERS];
16 char                            *filters[MAX_COUNTERS];
17
18 struct event_symbol {
19         u8              type;
20         u64             config;
21         const char      *symbol;
22         const char      *alias;
23 };
24
25 enum event_result {
26         EVT_FAILED,
27         EVT_HANDLED,
28         EVT_HANDLED_ALL
29 };
30
31 char debugfs_path[MAXPATHLEN];
32
33 #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
34 #define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
35
36 static struct event_symbol event_symbols[] = {
37   { CHW(CPU_CYCLES),            "cpu-cycles",           "cycles"        },
38   { CHW(INSTRUCTIONS),          "instructions",         ""              },
39   { CHW(CACHE_REFERENCES),      "cache-references",     ""              },
40   { CHW(CACHE_MISSES),          "cache-misses",         ""              },
41   { CHW(BRANCH_INSTRUCTIONS),   "branch-instructions",  "branches"      },
42   { CHW(BRANCH_MISSES),         "branch-misses",        ""              },
43   { CHW(BUS_CYCLES),            "bus-cycles",           ""              },
44
45   { CSW(CPU_CLOCK),             "cpu-clock",            ""              },
46   { CSW(TASK_CLOCK),            "task-clock",           ""              },
47   { CSW(PAGE_FAULTS),           "page-faults",          "faults"        },
48   { CSW(PAGE_FAULTS_MIN),       "minor-faults",         ""              },
49   { CSW(PAGE_FAULTS_MAJ),       "major-faults",         ""              },
50   { CSW(CONTEXT_SWITCHES),      "context-switches",     "cs"            },
51   { CSW(CPU_MIGRATIONS),        "cpu-migrations",       "migrations"    },
52   { CSW(ALIGNMENT_FAULTS),      "alignment-faults",     ""              },
53   { CSW(EMULATION_FAULTS),      "emulation-faults",     ""              },
54 };
55
56 #define __PERF_EVENT_FIELD(config, name) \
57         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
58
59 #define PERF_EVENT_RAW(config)  __PERF_EVENT_FIELD(config, RAW)
60 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
61 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
62 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
63
64 static const char *hw_event_names[] = {
65         "cycles",
66         "instructions",
67         "cache-references",
68         "cache-misses",
69         "branches",
70         "branch-misses",
71         "bus-cycles",
72 };
73
74 static const char *sw_event_names[] = {
75         "cpu-clock-msecs",
76         "task-clock-msecs",
77         "page-faults",
78         "context-switches",
79         "CPU-migrations",
80         "minor-faults",
81         "major-faults",
82         "alignment-faults",
83         "emulation-faults",
84 };
85
86 #define MAX_ALIASES 8
87
88 static const char *hw_cache[][MAX_ALIASES] = {
89  { "L1-dcache", "l1-d",         "l1d",          "L1-data",              },
90  { "L1-icache", "l1-i",         "l1i",          "L1-instruction",       },
91  { "LLC",       "L2"                                                    },
92  { "dTLB",      "d-tlb",        "Data-TLB",                             },
93  { "iTLB",      "i-tlb",        "Instruction-TLB",                      },
94  { "branch",    "branches",     "bpu",          "btb",          "bpc",  },
95 };
96
97 static const char *hw_cache_op[][MAX_ALIASES] = {
98  { "load",      "loads",        "read",                                 },
99  { "store",     "stores",       "write",                                },
100  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
101 };
102
103 static const char *hw_cache_result[][MAX_ALIASES] = {
104  { "refs",      "Reference",    "ops",          "access",               },
105  { "misses",    "miss",                                                 },
106 };
107
108 #define C(x)            PERF_COUNT_HW_CACHE_##x
109 #define CACHE_READ      (1 << C(OP_READ))
110 #define CACHE_WRITE     (1 << C(OP_WRITE))
111 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
112 #define COP(x)          (1 << x)
113
114 /*
115  * cache operartion stat
116  * L1I : Read and prefetch only
117  * ITLB and BPU : Read-only
118  */
119 static unsigned long hw_cache_stat[C(MAX)] = {
120  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
121  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
122  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
123  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
124  [C(ITLB)]      = (CACHE_READ),
125  [C(BPU)]       = (CACHE_READ),
126 };
127
128 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
129         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
130         if (sys_dirent.d_type == DT_DIR &&                                     \
131            (strcmp(sys_dirent.d_name, ".")) &&                                 \
132            (strcmp(sys_dirent.d_name, "..")))
133
134 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
135 {
136         char evt_path[MAXPATHLEN];
137         int fd;
138
139         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
140                         sys_dir->d_name, evt_dir->d_name);
141         fd = open(evt_path, O_RDONLY);
142         if (fd < 0)
143                 return -EINVAL;
144         close(fd);
145
146         return 0;
147 }
148
149 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
150         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
151         if (evt_dirent.d_type == DT_DIR &&                                     \
152            (strcmp(evt_dirent.d_name, ".")) &&                                 \
153            (strcmp(evt_dirent.d_name, "..")) &&                                \
154            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
155
156 #define MAX_EVENT_LENGTH 512
157
158
159 struct tracepoint_path *tracepoint_id_to_path(u64 config)
160 {
161         struct tracepoint_path *path = NULL;
162         DIR *sys_dir, *evt_dir;
163         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
164         char id_buf[4];
165         int fd;
166         u64 id;
167         char evt_path[MAXPATHLEN];
168         char dir_path[MAXPATHLEN];
169
170         if (debugfs_valid_mountpoint(debugfs_path))
171                 return NULL;
172
173         sys_dir = opendir(debugfs_path);
174         if (!sys_dir)
175                 return NULL;
176
177         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
178
179                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
180                          sys_dirent.d_name);
181                 evt_dir = opendir(dir_path);
182                 if (!evt_dir)
183                         continue;
184
185                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
186
187                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
188                                  evt_dirent.d_name);
189                         fd = open(evt_path, O_RDONLY);
190                         if (fd < 0)
191                                 continue;
192                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
193                                 close(fd);
194                                 continue;
195                         }
196                         close(fd);
197                         id = atoll(id_buf);
198                         if (id == config) {
199                                 closedir(evt_dir);
200                                 closedir(sys_dir);
201                                 path = zalloc(sizeof(*path));
202                                 path->system = malloc(MAX_EVENT_LENGTH);
203                                 if (!path->system) {
204                                         free(path);
205                                         return NULL;
206                                 }
207                                 path->name = malloc(MAX_EVENT_LENGTH);
208                                 if (!path->name) {
209                                         free(path->system);
210                                         free(path);
211                                         return NULL;
212                                 }
213                                 strncpy(path->system, sys_dirent.d_name,
214                                         MAX_EVENT_LENGTH);
215                                 strncpy(path->name, evt_dirent.d_name,
216                                         MAX_EVENT_LENGTH);
217                                 return path;
218                         }
219                 }
220                 closedir(evt_dir);
221         }
222
223         closedir(sys_dir);
224         return NULL;
225 }
226
227 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
228 static const char *tracepoint_id_to_name(u64 config)
229 {
230         static char buf[TP_PATH_LEN];
231         struct tracepoint_path *path;
232
233         path = tracepoint_id_to_path(config);
234         if (path) {
235                 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
236                 free(path->name);
237                 free(path->system);
238                 free(path);
239         } else
240                 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
241
242         return buf;
243 }
244
245 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
246 {
247         if (hw_cache_stat[cache_type] & COP(cache_op))
248                 return 1;       /* valid */
249         else
250                 return 0;       /* invalid */
251 }
252
253 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
254 {
255         static char name[50];
256
257         if (cache_result) {
258                 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
259                         hw_cache_op[cache_op][0],
260                         hw_cache_result[cache_result][0]);
261         } else {
262                 sprintf(name, "%s-%s", hw_cache[cache_type][0],
263                         hw_cache_op[cache_op][1]);
264         }
265
266         return name;
267 }
268
269 const char *event_name(int counter)
270 {
271         u64 config = attrs[counter].config;
272         int type = attrs[counter].type;
273
274         return __event_name(type, config);
275 }
276
277 const char *__event_name(int type, u64 config)
278 {
279         static char buf[32];
280
281         if (type == PERF_TYPE_RAW) {
282                 sprintf(buf, "raw 0x%llx", config);
283                 return buf;
284         }
285
286         switch (type) {
287         case PERF_TYPE_HARDWARE:
288                 if (config < PERF_COUNT_HW_MAX)
289                         return hw_event_names[config];
290                 return "unknown-hardware";
291
292         case PERF_TYPE_HW_CACHE: {
293                 u8 cache_type, cache_op, cache_result;
294
295                 cache_type   = (config >>  0) & 0xff;
296                 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
297                         return "unknown-ext-hardware-cache-type";
298
299                 cache_op     = (config >>  8) & 0xff;
300                 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
301                         return "unknown-ext-hardware-cache-op";
302
303                 cache_result = (config >> 16) & 0xff;
304                 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
305                         return "unknown-ext-hardware-cache-result";
306
307                 if (!is_cache_op_valid(cache_type, cache_op))
308                         return "invalid-cache";
309
310                 return event_cache_name(cache_type, cache_op, cache_result);
311         }
312
313         case PERF_TYPE_SOFTWARE:
314                 if (config < PERF_COUNT_SW_MAX)
315                         return sw_event_names[config];
316                 return "unknown-software";
317
318         case PERF_TYPE_TRACEPOINT:
319                 return tracepoint_id_to_name(config);
320
321         default:
322                 break;
323         }
324
325         return "unknown";
326 }
327
328 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
329 {
330         int i, j;
331         int n, longest = -1;
332
333         for (i = 0; i < size; i++) {
334                 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
335                         n = strlen(names[i][j]);
336                         if (n > longest && !strncasecmp(*str, names[i][j], n))
337                                 longest = n;
338                 }
339                 if (longest > 0) {
340                         *str += longest;
341                         return i;
342                 }
343         }
344
345         return -1;
346 }
347
348 static enum event_result
349 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
350 {
351         const char *s = *str;
352         int cache_type = -1, cache_op = -1, cache_result = -1;
353
354         cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
355         /*
356          * No fallback - if we cannot get a clear cache type
357          * then bail out:
358          */
359         if (cache_type == -1)
360                 return EVT_FAILED;
361
362         while ((cache_op == -1 || cache_result == -1) && *s == '-') {
363                 ++s;
364
365                 if (cache_op == -1) {
366                         cache_op = parse_aliases(&s, hw_cache_op,
367                                                 PERF_COUNT_HW_CACHE_OP_MAX);
368                         if (cache_op >= 0) {
369                                 if (!is_cache_op_valid(cache_type, cache_op))
370                                         return 0;
371                                 continue;
372                         }
373                 }
374
375                 if (cache_result == -1) {
376                         cache_result = parse_aliases(&s, hw_cache_result,
377                                                 PERF_COUNT_HW_CACHE_RESULT_MAX);
378                         if (cache_result >= 0)
379                                 continue;
380                 }
381
382                 /*
383                  * Can't parse this as a cache op or result, so back up
384                  * to the '-'.
385                  */
386                 --s;
387                 break;
388         }
389
390         /*
391          * Fall back to reads:
392          */
393         if (cache_op == -1)
394                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
395
396         /*
397          * Fall back to accesses:
398          */
399         if (cache_result == -1)
400                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
401
402         attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
403         attr->type = PERF_TYPE_HW_CACHE;
404
405         *str = s;
406         return EVT_HANDLED;
407 }
408
409 static enum event_result
410 parse_single_tracepoint_event(char *sys_name,
411                               const char *evt_name,
412                               unsigned int evt_length,
413                               struct perf_event_attr *attr,
414                               const char **strp)
415 {
416         char evt_path[MAXPATHLEN];
417         char id_buf[4];
418         u64 id;
419         int fd;
420
421         attr->sample_type |= PERF_SAMPLE_RAW;
422         attr->sample_type |= PERF_SAMPLE_TIME;
423         attr->sample_type |= PERF_SAMPLE_CPU;
424
425         attr->sample_period = 1;
426
427         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
428                  sys_name, evt_name);
429
430         fd = open(evt_path, O_RDONLY);
431         if (fd < 0)
432                 return EVT_FAILED;
433
434         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
435                 close(fd);
436                 return EVT_FAILED;
437         }
438
439         close(fd);
440         id = atoll(id_buf);
441         attr->config = id;
442         attr->type = PERF_TYPE_TRACEPOINT;
443         *strp = evt_name + evt_length;
444
445         return EVT_HANDLED;
446 }
447
448 /* sys + ':' + event + ':' + flags*/
449 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
450 static enum event_result
451 parse_multiple_tracepoint_event(char *sys_name, const char *evt_exp,
452                                 char *flags)
453 {
454         char evt_path[MAXPATHLEN];
455         struct dirent *evt_ent;
456         DIR *evt_dir;
457
458         snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
459         evt_dir = opendir(evt_path);
460
461         if (!evt_dir) {
462                 perror("Can't open event dir");
463                 return EVT_FAILED;
464         }
465
466         while ((evt_ent = readdir(evt_dir))) {
467                 char event_opt[MAX_EVOPT_LEN + 1];
468                 int len;
469
470                 if (!strcmp(evt_ent->d_name, ".")
471                     || !strcmp(evt_ent->d_name, "..")
472                     || !strcmp(evt_ent->d_name, "enable")
473                     || !strcmp(evt_ent->d_name, "filter"))
474                         continue;
475
476                 if (!strglobmatch(evt_ent->d_name, evt_exp))
477                         continue;
478
479                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
480                                evt_ent->d_name, flags ? ":" : "",
481                                flags ?: "");
482                 if (len < 0)
483                         return EVT_FAILED;
484
485                 if (parse_events(NULL, event_opt, 0))
486                         return EVT_FAILED;
487         }
488
489         return EVT_HANDLED_ALL;
490 }
491
492
493 static enum event_result parse_tracepoint_event(const char **strp,
494                                     struct perf_event_attr *attr)
495 {
496         const char *evt_name;
497         char *flags;
498         char sys_name[MAX_EVENT_LENGTH];
499         unsigned int sys_length, evt_length;
500
501         if (debugfs_valid_mountpoint(debugfs_path))
502                 return 0;
503
504         evt_name = strchr(*strp, ':');
505         if (!evt_name)
506                 return EVT_FAILED;
507
508         sys_length = evt_name - *strp;
509         if (sys_length >= MAX_EVENT_LENGTH)
510                 return 0;
511
512         strncpy(sys_name, *strp, sys_length);
513         sys_name[sys_length] = '\0';
514         evt_name = evt_name + 1;
515
516         flags = strchr(evt_name, ':');
517         if (flags) {
518                 /* split it out: */
519                 evt_name = strndup(evt_name, flags - evt_name);
520                 flags++;
521         }
522
523         evt_length = strlen(evt_name);
524         if (evt_length >= MAX_EVENT_LENGTH)
525                 return EVT_FAILED;
526
527         if (strpbrk(evt_name, "*?")) {
528                 *strp = evt_name + evt_length;
529                 return parse_multiple_tracepoint_event(sys_name, evt_name,
530                                                        flags);
531         } else
532                 return parse_single_tracepoint_event(sys_name, evt_name,
533                                                      evt_length, attr, strp);
534 }
535
536 static enum event_result
537 parse_breakpoint_type(const char *type, const char **strp,
538                       struct perf_event_attr *attr)
539 {
540         int i;
541
542         for (i = 0; i < 3; i++) {
543                 if (!type[i])
544                         break;
545
546                 switch (type[i]) {
547                 case 'r':
548                         attr->bp_type |= HW_BREAKPOINT_R;
549                         break;
550                 case 'w':
551                         attr->bp_type |= HW_BREAKPOINT_W;
552                         break;
553                 case 'x':
554                         attr->bp_type |= HW_BREAKPOINT_X;
555                         break;
556                 default:
557                         return EVT_FAILED;
558                 }
559         }
560         if (!attr->bp_type) /* Default */
561                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
562
563         *strp = type + i;
564
565         return EVT_HANDLED;
566 }
567
568 static enum event_result
569 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
570 {
571         const char *target;
572         const char *type;
573         char *endaddr;
574         u64 addr;
575         enum event_result err;
576
577         target = strchr(*strp, ':');
578         if (!target)
579                 return EVT_FAILED;
580
581         if (strncmp(*strp, "mem", target - *strp) != 0)
582                 return EVT_FAILED;
583
584         target++;
585
586         addr = strtoull(target, &endaddr, 0);
587         if (target == endaddr)
588                 return EVT_FAILED;
589
590         attr->bp_addr = addr;
591         *strp = endaddr;
592
593         type = strchr(target, ':');
594
595         /* If no type is defined, just rw as default */
596         if (!type) {
597                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
598         } else {
599                 err = parse_breakpoint_type(++type, strp, attr);
600                 if (err == EVT_FAILED)
601                         return EVT_FAILED;
602         }
603
604         /* We should find a nice way to override the access type */
605         attr->bp_len = HW_BREAKPOINT_LEN_4;
606         attr->type = PERF_TYPE_BREAKPOINT;
607
608         return EVT_HANDLED;
609 }
610
611 static int check_events(const char *str, unsigned int i)
612 {
613         int n;
614
615         n = strlen(event_symbols[i].symbol);
616         if (!strncmp(str, event_symbols[i].symbol, n))
617                 return n;
618
619         n = strlen(event_symbols[i].alias);
620         if (n)
621                 if (!strncmp(str, event_symbols[i].alias, n))
622                         return n;
623         return 0;
624 }
625
626 static enum event_result
627 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
628 {
629         const char *str = *strp;
630         unsigned int i;
631         int n;
632
633         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
634                 n = check_events(str, i);
635                 if (n > 0) {
636                         attr->type = event_symbols[i].type;
637                         attr->config = event_symbols[i].config;
638                         *strp = str + n;
639                         return EVT_HANDLED;
640                 }
641         }
642         return EVT_FAILED;
643 }
644
645 static enum event_result
646 parse_raw_event(const char **strp, struct perf_event_attr *attr)
647 {
648         const char *str = *strp;
649         u64 config;
650         int n;
651
652         if (*str != 'r')
653                 return EVT_FAILED;
654         n = hex2u64(str + 1, &config);
655         if (n > 0) {
656                 if (str[n+1] == 'p') {
657                         attr->precise = 1;
658                         n++;
659                 }
660                 *strp = str + n + 1;
661                 attr->type = PERF_TYPE_RAW;
662                 attr->config = config;
663                 return EVT_HANDLED;
664         }
665         return EVT_FAILED;
666 }
667
668 static enum event_result
669 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
670 {
671         const char *str = *strp;
672         char *endp;
673         unsigned long type;
674         u64 config;
675
676         type = strtoul(str, &endp, 0);
677         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
678                 str = endp + 1;
679                 config = strtoul(str, &endp, 0);
680                 if (endp > str) {
681                         attr->type = type;
682                         attr->config = config;
683                         *strp = endp;
684                         return EVT_HANDLED;
685                 }
686         }
687         return EVT_FAILED;
688 }
689
690 static enum event_result
691 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
692 {
693         const char *str = *strp;
694         int eu = 1, ek = 1, eh = 1;
695
696         if (*str++ != ':')
697                 return 0;
698         while (*str) {
699                 if (*str == 'u')
700                         eu = 0;
701                 else if (*str == 'k')
702                         ek = 0;
703                 else if (*str == 'h')
704                         eh = 0;
705                 else
706                         break;
707                 ++str;
708         }
709         if (str >= *strp + 2) {
710                 *strp = str;
711                 attr->exclude_user   = eu;
712                 attr->exclude_kernel = ek;
713                 attr->exclude_hv     = eh;
714                 return 1;
715         }
716         return 0;
717 }
718
719 /*
720  * Each event can have multiple symbolic names.
721  * Symbolic names are (almost) exactly matched.
722  */
723 static enum event_result
724 parse_event_symbols(const char **str, struct perf_event_attr *attr)
725 {
726         enum event_result ret;
727
728         ret = parse_tracepoint_event(str, attr);
729         if (ret != EVT_FAILED)
730                 goto modifier;
731
732         ret = parse_raw_event(str, attr);
733         if (ret != EVT_FAILED)
734                 goto modifier;
735
736         ret = parse_numeric_event(str, attr);
737         if (ret != EVT_FAILED)
738                 goto modifier;
739
740         ret = parse_symbolic_event(str, attr);
741         if (ret != EVT_FAILED)
742                 goto modifier;
743
744         ret = parse_generic_hw_event(str, attr);
745         if (ret != EVT_FAILED)
746                 goto modifier;
747
748         ret = parse_breakpoint_event(str, attr);
749         if (ret != EVT_FAILED)
750                 goto modifier;
751
752         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
753         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
754         return EVT_FAILED;
755
756 modifier:
757         parse_event_modifier(str, attr);
758
759         return ret;
760 }
761
762 static int store_event_type(const char *orgname)
763 {
764         char filename[PATH_MAX], *c;
765         FILE *file;
766         int id, n;
767
768         sprintf(filename, "%s/", debugfs_path);
769         strncat(filename, orgname, strlen(orgname));
770         strcat(filename, "/id");
771
772         c = strchr(filename, ':');
773         if (c)
774                 *c = '/';
775
776         file = fopen(filename, "r");
777         if (!file)
778                 return 0;
779         n = fscanf(file, "%i", &id);
780         fclose(file);
781         if (n < 1) {
782                 pr_err("cannot store event ID\n");
783                 return -EINVAL;
784         }
785         return perf_header__push_event(id, orgname);
786 }
787
788 int parse_events(const struct option *opt __used, const char *str, int unset __used)
789 {
790         struct perf_event_attr attr;
791         enum event_result ret;
792
793         if (strchr(str, ':'))
794                 if (store_event_type(str) < 0)
795                         return -1;
796
797         for (;;) {
798                 if (nr_counters == MAX_COUNTERS)
799                         return -1;
800
801                 memset(&attr, 0, sizeof(attr));
802                 ret = parse_event_symbols(&str, &attr);
803                 if (ret == EVT_FAILED)
804                         return -1;
805
806                 if (!(*str == 0 || *str == ',' || isspace(*str)))
807                         return -1;
808
809                 if (ret != EVT_HANDLED_ALL) {
810                         attrs[nr_counters] = attr;
811                         nr_counters++;
812                 }
813
814                 if (*str == 0)
815                         break;
816                 if (*str == ',')
817                         ++str;
818                 while (isspace(*str))
819                         ++str;
820         }
821
822         return 0;
823 }
824
825 int parse_filter(const struct option *opt __used, const char *str,
826                  int unset __used)
827 {
828         int i = nr_counters - 1;
829         int len = strlen(str);
830
831         if (i < 0 || attrs[i].type != PERF_TYPE_TRACEPOINT) {
832                 fprintf(stderr,
833                         "-F option should follow a -e tracepoint option\n");
834                 return -1;
835         }
836
837         filters[i] = malloc(len + 1);
838         if (!filters[i]) {
839                 fprintf(stderr, "not enough memory to hold filter string\n");
840                 return -1;
841         }
842         strcpy(filters[i], str);
843
844         return 0;
845 }
846
847 static const char * const event_type_descriptors[] = {
848         "Hardware event",
849         "Software event",
850         "Tracepoint event",
851         "Hardware cache event",
852         "Raw hardware event descriptor",
853         "Hardware breakpoint",
854 };
855
856 /*
857  * Print the events from <debugfs_mount_point>/tracing/events
858  */
859
860 static void print_tracepoint_events(void)
861 {
862         DIR *sys_dir, *evt_dir;
863         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
864         char evt_path[MAXPATHLEN];
865         char dir_path[MAXPATHLEN];
866
867         if (debugfs_valid_mountpoint(debugfs_path))
868                 return;
869
870         sys_dir = opendir(debugfs_path);
871         if (!sys_dir)
872                 return;
873
874         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
875
876                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
877                          sys_dirent.d_name);
878                 evt_dir = opendir(dir_path);
879                 if (!evt_dir)
880                         continue;
881
882                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
883                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
884                                  sys_dirent.d_name, evt_dirent.d_name);
885                         printf("  %-42s [%s]\n", evt_path,
886                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
887                 }
888                 closedir(evt_dir);
889         }
890         closedir(sys_dir);
891 }
892
893 /*
894  * Print the help text for the event symbols:
895  */
896 void print_events(void)
897 {
898         struct event_symbol *syms = event_symbols;
899         unsigned int i, type, op, prev_type = -1;
900         char name[40];
901
902         printf("\n");
903         printf("List of pre-defined events (to be used in -e):\n");
904
905         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
906                 type = syms->type;
907
908                 if (type != prev_type)
909                         printf("\n");
910
911                 if (strlen(syms->alias))
912                         sprintf(name, "%s OR %s", syms->symbol, syms->alias);
913                 else
914                         strcpy(name, syms->symbol);
915                 printf("  %-42s [%s]\n", name,
916                         event_type_descriptors[type]);
917
918                 prev_type = type;
919         }
920
921         printf("\n");
922         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
923                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
924                         /* skip invalid cache type */
925                         if (!is_cache_op_valid(type, op))
926                                 continue;
927
928                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
929                                 printf("  %-42s [%s]\n",
930                                         event_cache_name(type, op, i),
931                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
932                         }
933                 }
934         }
935
936         printf("\n");
937         printf("  %-42s [%s]\n",
938                 "rNNN", event_type_descriptors[PERF_TYPE_RAW]);
939         printf("\n");
940
941         printf("  %-42s [%s]\n",
942                         "mem:<addr>[:access]",
943                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
944         printf("\n");
945
946         print_tracepoint_events();
947
948         exit(129);
949 }