perf list: Fix max event string size
[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 "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 -1;
739
740         while (*str) {
741                 if (*str == 'u') {
742                         if (!exclude)
743                                 exclude = eu = ek = eh = 1;
744                         eu = 0;
745                 } else if (*str == 'k') {
746                         if (!exclude)
747                                 exclude = eu = ek = eh = 1;
748                         ek = 0;
749                 } else if (*str == 'h') {
750                         if (!exclude)
751                                 exclude = eu = ek = eh = 1;
752                         eh = 0;
753                 } else if (*str == 'p') {
754                         precise++;
755                 } else
756                         break;
757
758                 ++str;
759         }
760         if (str < *strp + 2)
761                 return -1;
762
763         *strp = str;
764
765         attr->exclude_user   = eu;
766         attr->exclude_kernel = ek;
767         attr->exclude_hv     = eh;
768         attr->precise_ip     = precise;
769
770         return 0;
771 }
772
773 /*
774  * Each event can have multiple symbolic names.
775  * Symbolic names are (almost) exactly matched.
776  */
777 static enum event_result
778 parse_event_symbols(const struct option *opt, const char **str,
779                     struct perf_event_attr *attr)
780 {
781         enum event_result ret;
782
783         ret = parse_tracepoint_event(opt, str, attr);
784         if (ret != EVT_FAILED)
785                 goto modifier;
786
787         ret = parse_raw_event(str, attr);
788         if (ret != EVT_FAILED)
789                 goto modifier;
790
791         ret = parse_numeric_event(str, attr);
792         if (ret != EVT_FAILED)
793                 goto modifier;
794
795         ret = parse_symbolic_event(str, attr);
796         if (ret != EVT_FAILED)
797                 goto modifier;
798
799         ret = parse_generic_hw_event(str, attr);
800         if (ret != EVT_FAILED)
801                 goto modifier;
802
803         ret = parse_breakpoint_event(str, attr);
804         if (ret != EVT_FAILED)
805                 goto modifier;
806
807         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
808         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
809         return EVT_FAILED;
810
811 modifier:
812         if (parse_event_modifier(str, attr) < 0) {
813                 fprintf(stderr, "invalid event modifier: '%s'\n", *str);
814                 fprintf(stderr, "Run 'perf list' for a list of valid events and modifiers\n");
815
816                 return EVT_FAILED;
817         }
818
819         return ret;
820 }
821
822 int parse_events(const struct option *opt, const char *str, int unset __used)
823 {
824         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
825         struct perf_event_attr attr;
826         enum event_result ret;
827         const char *ostr;
828
829         for (;;) {
830                 ostr = str;
831                 memset(&attr, 0, sizeof(attr));
832                 ret = parse_event_symbols(opt, &str, &attr);
833                 if (ret == EVT_FAILED)
834                         return -1;
835
836                 if (!(*str == 0 || *str == ',' || isspace(*str)))
837                         return -1;
838
839                 if (ret != EVT_HANDLED_ALL) {
840                         struct perf_evsel *evsel;
841                         evsel = perf_evsel__new(&attr, evlist->nr_entries);
842                         if (evsel == NULL)
843                                 return -1;
844                         perf_evlist__add(evlist, evsel);
845
846                         evsel->name = calloc(str - ostr + 1, 1);
847                         if (!evsel->name)
848                                 return -1;
849                         strncpy(evsel->name, ostr, str - ostr);
850                 }
851
852                 if (*str == 0)
853                         break;
854                 if (*str == ',')
855                         ++str;
856                 while (isspace(*str))
857                         ++str;
858         }
859
860         return 0;
861 }
862
863 int parse_filter(const struct option *opt, const char *str,
864                  int unset __used)
865 {
866         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
867         struct perf_evsel *last = NULL;
868
869         if (evlist->nr_entries > 0)
870                 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
871
872         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
873                 fprintf(stderr,
874                         "-F option should follow a -e tracepoint option\n");
875                 return -1;
876         }
877
878         last->filter = strdup(str);
879         if (last->filter == NULL) {
880                 fprintf(stderr, "not enough memory to hold filter string\n");
881                 return -1;
882         }
883
884         return 0;
885 }
886
887 static const char * const event_type_descriptors[] = {
888         "Hardware event",
889         "Software event",
890         "Tracepoint event",
891         "Hardware cache event",
892         "Raw hardware event descriptor",
893         "Hardware breakpoint",
894 };
895
896 /*
897  * Print the events from <debugfs_mount_point>/tracing/events
898  */
899
900 void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
901 {
902         DIR *sys_dir, *evt_dir;
903         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
904         char evt_path[MAXPATHLEN];
905         char dir_path[MAXPATHLEN];
906
907         if (debugfs_valid_mountpoint(debugfs_path))
908                 return;
909
910         sys_dir = opendir(debugfs_path);
911         if (!sys_dir)
912                 return;
913
914         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
915                 if (subsys_glob != NULL && 
916                     !strglobmatch(sys_dirent.d_name, subsys_glob))
917                         continue;
918
919                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
920                          sys_dirent.d_name);
921                 evt_dir = opendir(dir_path);
922                 if (!evt_dir)
923                         continue;
924
925                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
926                         if (event_glob != NULL && 
927                             !strglobmatch(evt_dirent.d_name, event_glob))
928                                 continue;
929
930                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
931                                  sys_dirent.d_name, evt_dirent.d_name);
932                         printf("  %-50s [%s]\n", evt_path,
933                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
934                 }
935                 closedir(evt_dir);
936         }
937         closedir(sys_dir);
938 }
939
940 /*
941  * Check whether event is in <debugfs_mount_point>/tracing/events
942  */
943
944 int is_valid_tracepoint(const char *event_string)
945 {
946         DIR *sys_dir, *evt_dir;
947         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
948         char evt_path[MAXPATHLEN];
949         char dir_path[MAXPATHLEN];
950
951         if (debugfs_valid_mountpoint(debugfs_path))
952                 return 0;
953
954         sys_dir = opendir(debugfs_path);
955         if (!sys_dir)
956                 return 0;
957
958         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
959
960                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
961                          sys_dirent.d_name);
962                 evt_dir = opendir(dir_path);
963                 if (!evt_dir)
964                         continue;
965
966                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
967                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
968                                  sys_dirent.d_name, evt_dirent.d_name);
969                         if (!strcmp(evt_path, event_string)) {
970                                 closedir(evt_dir);
971                                 closedir(sys_dir);
972                                 return 1;
973                         }
974                 }
975                 closedir(evt_dir);
976         }
977         closedir(sys_dir);
978         return 0;
979 }
980
981 void print_events_type(u8 type)
982 {
983         struct event_symbol *syms = event_symbols;
984         unsigned int i;
985         char name[64];
986
987         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
988                 if (type != syms->type)
989                         continue;
990
991                 if (strlen(syms->alias))
992                         snprintf(name, sizeof(name),  "%s OR %s",
993                                  syms->symbol, syms->alias);
994                 else
995                         snprintf(name, sizeof(name), "%s", syms->symbol);
996
997                 printf("  %-50s [%s]\n", name,
998                         event_type_descriptors[type]);
999         }
1000 }
1001
1002 int print_hwcache_events(const char *event_glob)
1003 {
1004         unsigned int type, op, i, printed = 0;
1005
1006         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1007                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1008                         /* skip invalid cache type */
1009                         if (!is_cache_op_valid(type, op))
1010                                 continue;
1011
1012                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1013                                 char *name = event_cache_name(type, op, i);
1014
1015                                 if (event_glob != NULL && !strglobmatch(name, event_glob))
1016                                         continue;
1017
1018                                 printf("  %-50s [%s]\n", name,
1019                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
1020                                 ++printed;
1021                         }
1022                 }
1023         }
1024
1025         return printed;
1026 }
1027
1028 #define MAX_NAME_LEN 100
1029
1030 /*
1031  * Print the help text for the event symbols:
1032  */
1033 void print_events(const char *event_glob)
1034 {
1035         unsigned int i, type, prev_type = -1, printed = 0, ntypes_printed = 0;
1036         struct event_symbol *syms = event_symbols;
1037         char name[MAX_NAME_LEN];
1038
1039         printf("\n");
1040         printf("List of pre-defined events (to be used in -e):\n");
1041
1042         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1043                 type = syms->type;
1044
1045                 if (type != prev_type && printed) {
1046                         printf("\n");
1047                         printed = 0;
1048                         ntypes_printed++;
1049                 }
1050
1051                 if (event_glob != NULL && 
1052                     !(strglobmatch(syms->symbol, event_glob) ||
1053                       (syms->alias && strglobmatch(syms->alias, event_glob))))
1054                         continue;
1055
1056                 if (strlen(syms->alias))
1057                         snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1058                 else
1059                         strncpy(name, syms->symbol, MAX_NAME_LEN);
1060                 printf("  %-50s [%s]\n", name,
1061                         event_type_descriptors[type]);
1062
1063                 prev_type = type;
1064                 ++printed;
1065         }
1066
1067         if (ntypes_printed) {
1068                 printed = 0;
1069                 printf("\n");
1070         }
1071         print_hwcache_events(event_glob);
1072
1073         if (event_glob != NULL)
1074                 return;
1075
1076         printf("\n");
1077         printf("  %-50s [%s]\n",
1078                 "rNNN (see 'perf list --help' on how to encode it)",
1079                event_type_descriptors[PERF_TYPE_RAW]);
1080         printf("\n");
1081
1082         printf("  %-50s [%s]\n",
1083                         "mem:<addr>[:access]",
1084                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1085         printf("\n");
1086
1087         print_tracepoint_events(NULL, NULL);
1088
1089         exit(129);
1090 }