perf: make perf stat print user provided full event names
[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(INSTRUCTIONS),          "instructions",         ""              },
36   { CHW(CACHE_REFERENCES),      "cache-references",     ""              },
37   { CHW(CACHE_MISSES),          "cache-misses",         ""              },
38   { CHW(BRANCH_INSTRUCTIONS),   "branch-instructions",  "branches"      },
39   { CHW(BRANCH_MISSES),         "branch-misses",        ""              },
40   { CHW(BUS_CYCLES),            "bus-cycles",           ""              },
41
42   { CSW(CPU_CLOCK),             "cpu-clock",            ""              },
43   { CSW(TASK_CLOCK),            "task-clock",           ""              },
44   { CSW(PAGE_FAULTS),           "page-faults",          "faults"        },
45   { CSW(PAGE_FAULTS_MIN),       "minor-faults",         ""              },
46   { CSW(PAGE_FAULTS_MAJ),       "major-faults",         ""              },
47   { CSW(CONTEXT_SWITCHES),      "context-switches",     "cs"            },
48   { CSW(CPU_MIGRATIONS),        "cpu-migrations",       "migrations"    },
49   { CSW(ALIGNMENT_FAULTS),      "alignment-faults",     ""              },
50   { CSW(EMULATION_FAULTS),      "emulation-faults",     ""              },
51 };
52
53 #define __PERF_EVENT_FIELD(config, name) \
54         ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
55
56 #define PERF_EVENT_RAW(config)  __PERF_EVENT_FIELD(config, RAW)
57 #define PERF_EVENT_CONFIG(config)       __PERF_EVENT_FIELD(config, CONFIG)
58 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
59 #define PERF_EVENT_ID(config)           __PERF_EVENT_FIELD(config, EVENT)
60
61 static const char *hw_event_names[] = {
62         "cycles",
63         "instructions",
64         "cache-references",
65         "cache-misses",
66         "branches",
67         "branch-misses",
68         "bus-cycles",
69 };
70
71 static const char *sw_event_names[] = {
72         "cpu-clock-msecs",
73         "task-clock-msecs",
74         "page-faults",
75         "context-switches",
76         "CPU-migrations",
77         "minor-faults",
78         "major-faults",
79         "alignment-faults",
80         "emulation-faults",
81 };
82
83 #define MAX_ALIASES 8
84
85 static const char *hw_cache[][MAX_ALIASES] = {
86  { "L1-dcache", "l1-d",         "l1d",          "L1-data",              },
87  { "L1-icache", "l1-i",         "l1i",          "L1-instruction",       },
88  { "LLC",       "L2"                                                    },
89  { "dTLB",      "d-tlb",        "Data-TLB",                             },
90  { "iTLB",      "i-tlb",        "Instruction-TLB",                      },
91  { "branch",    "branches",     "bpu",          "btb",          "bpc",  },
92 };
93
94 static const char *hw_cache_op[][MAX_ALIASES] = {
95  { "load",      "loads",        "read",                                 },
96  { "store",     "stores",       "write",                                },
97  { "prefetch",  "prefetches",   "speculative-read", "speculative-load", },
98 };
99
100 static const char *hw_cache_result[][MAX_ALIASES] = {
101  { "refs",      "Reference",    "ops",          "access",               },
102  { "misses",    "miss",                                                 },
103 };
104
105 #define C(x)            PERF_COUNT_HW_CACHE_##x
106 #define CACHE_READ      (1 << C(OP_READ))
107 #define CACHE_WRITE     (1 << C(OP_WRITE))
108 #define CACHE_PREFETCH  (1 << C(OP_PREFETCH))
109 #define COP(x)          (1 << x)
110
111 /*
112  * cache operartion stat
113  * L1I : Read and prefetch only
114  * ITLB and BPU : Read-only
115  */
116 static unsigned long hw_cache_stat[C(MAX)] = {
117  [C(L1D)]       = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
118  [C(L1I)]       = (CACHE_READ | CACHE_PREFETCH),
119  [C(LL)]        = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
120  [C(DTLB)]      = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
121  [C(ITLB)]      = (CACHE_READ),
122  [C(BPU)]       = (CACHE_READ),
123 };
124
125 #define for_each_subsystem(sys_dir, sys_dirent, sys_next)              \
126         while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next)        \
127         if (sys_dirent.d_type == DT_DIR &&                                     \
128            (strcmp(sys_dirent.d_name, ".")) &&                                 \
129            (strcmp(sys_dirent.d_name, "..")))
130
131 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
132 {
133         char evt_path[MAXPATHLEN];
134         int fd;
135
136         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
137                         sys_dir->d_name, evt_dir->d_name);
138         fd = open(evt_path, O_RDONLY);
139         if (fd < 0)
140                 return -EINVAL;
141         close(fd);
142
143         return 0;
144 }
145
146 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next)              \
147         while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next)        \
148         if (evt_dirent.d_type == DT_DIR &&                                     \
149            (strcmp(evt_dirent.d_name, ".")) &&                                 \
150            (strcmp(evt_dirent.d_name, "..")) &&                                \
151            (!tp_event_has_id(&sys_dirent, &evt_dirent)))
152
153 #define MAX_EVENT_LENGTH 512
154
155
156 struct tracepoint_path *tracepoint_id_to_path(u64 config)
157 {
158         struct tracepoint_path *path = NULL;
159         DIR *sys_dir, *evt_dir;
160         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
161         char id_buf[4];
162         int fd;
163         u64 id;
164         char evt_path[MAXPATHLEN];
165         char dir_path[MAXPATHLEN];
166
167         if (debugfs_valid_mountpoint(debugfs_path))
168                 return NULL;
169
170         sys_dir = opendir(debugfs_path);
171         if (!sys_dir)
172                 return NULL;
173
174         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
175
176                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
177                          sys_dirent.d_name);
178                 evt_dir = opendir(dir_path);
179                 if (!evt_dir)
180                         continue;
181
182                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
183
184                         snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
185                                  evt_dirent.d_name);
186                         fd = open(evt_path, O_RDONLY);
187                         if (fd < 0)
188                                 continue;
189                         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
190                                 close(fd);
191                                 continue;
192                         }
193                         close(fd);
194                         id = atoll(id_buf);
195                         if (id == config) {
196                                 closedir(evt_dir);
197                                 closedir(sys_dir);
198                                 path = zalloc(sizeof(*path));
199                                 path->system = malloc(MAX_EVENT_LENGTH);
200                                 if (!path->system) {
201                                         free(path);
202                                         return NULL;
203                                 }
204                                 path->name = malloc(MAX_EVENT_LENGTH);
205                                 if (!path->name) {
206                                         free(path->system);
207                                         free(path);
208                                         return NULL;
209                                 }
210                                 strncpy(path->system, sys_dirent.d_name,
211                                         MAX_EVENT_LENGTH);
212                                 strncpy(path->name, evt_dirent.d_name,
213                                         MAX_EVENT_LENGTH);
214                                 return path;
215                         }
216                 }
217                 closedir(evt_dir);
218         }
219
220         closedir(sys_dir);
221         return NULL;
222 }
223
224 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
225 static const char *tracepoint_id_to_name(u64 config)
226 {
227         static char buf[TP_PATH_LEN];
228         struct tracepoint_path *path;
229
230         path = tracepoint_id_to_path(config);
231         if (path) {
232                 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
233                 free(path->name);
234                 free(path->system);
235                 free(path);
236         } else
237                 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
238
239         return buf;
240 }
241
242 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
243 {
244         if (hw_cache_stat[cache_type] & COP(cache_op))
245                 return 1;       /* valid */
246         else
247                 return 0;       /* invalid */
248 }
249
250 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
251 {
252         static char name[50];
253
254         if (cache_result) {
255                 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
256                         hw_cache_op[cache_op][0],
257                         hw_cache_result[cache_result][0]);
258         } else {
259                 sprintf(name, "%s-%s", hw_cache[cache_type][0],
260                         hw_cache_op[cache_op][1]);
261         }
262
263         return name;
264 }
265
266 const char *event_name(struct perf_evsel *evsel)
267 {
268         u64 config = evsel->attr.config;
269         int type = evsel->attr.type;
270
271         if (evsel->name)
272                 return evsel->name;
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%" PRIx64, 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         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
422                  sys_name, evt_name);
423
424         fd = open(evt_path, O_RDONLY);
425         if (fd < 0)
426                 return EVT_FAILED;
427
428         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
429                 close(fd);
430                 return EVT_FAILED;
431         }
432
433         close(fd);
434         id = atoll(id_buf);
435         attr->config = id;
436         attr->type = PERF_TYPE_TRACEPOINT;
437         *strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
438
439         attr->sample_type |= PERF_SAMPLE_RAW;
440         attr->sample_type |= PERF_SAMPLE_TIME;
441         attr->sample_type |= PERF_SAMPLE_CPU;
442
443         attr->sample_period = 1;
444
445
446         return EVT_HANDLED;
447 }
448
449 /* sys + ':' + event + ':' + flags*/
450 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
451 static enum event_result
452 parse_multiple_tracepoint_event(const struct option *opt, char *sys_name,
453                                 const char *evt_exp, char *flags)
454 {
455         char evt_path[MAXPATHLEN];
456         struct dirent *evt_ent;
457         DIR *evt_dir;
458
459         snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
460         evt_dir = opendir(evt_path);
461
462         if (!evt_dir) {
463                 perror("Can't open event dir");
464                 return EVT_FAILED;
465         }
466
467         while ((evt_ent = readdir(evt_dir))) {
468                 char event_opt[MAX_EVOPT_LEN + 1];
469                 int len;
470
471                 if (!strcmp(evt_ent->d_name, ".")
472                     || !strcmp(evt_ent->d_name, "..")
473                     || !strcmp(evt_ent->d_name, "enable")
474                     || !strcmp(evt_ent->d_name, "filter"))
475                         continue;
476
477                 if (!strglobmatch(evt_ent->d_name, evt_exp))
478                         continue;
479
480                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
481                                evt_ent->d_name, flags ? ":" : "",
482                                flags ?: "");
483                 if (len < 0)
484                         return EVT_FAILED;
485
486                 if (parse_events(opt, event_opt, 0))
487                         return EVT_FAILED;
488         }
489
490         return EVT_HANDLED_ALL;
491 }
492
493 static enum event_result
494 parse_tracepoint_event(const struct option *opt, const char **strp,
495                        struct perf_event_attr *attr)
496 {
497         const char *evt_name;
498         char *flags = NULL, *comma_loc;
499         char sys_name[MAX_EVENT_LENGTH];
500         unsigned int sys_length, evt_length;
501
502         if (debugfs_valid_mountpoint(debugfs_path))
503                 return 0;
504
505         evt_name = strchr(*strp, ':');
506         if (!evt_name)
507                 return EVT_FAILED;
508
509         sys_length = evt_name - *strp;
510         if (sys_length >= MAX_EVENT_LENGTH)
511                 return 0;
512
513         strncpy(sys_name, *strp, sys_length);
514         sys_name[sys_length] = '\0';
515         evt_name = evt_name + 1;
516
517         comma_loc = strchr(evt_name, ',');
518         if (comma_loc) {
519                 /* take the event name up to the comma */
520                 evt_name = strndup(evt_name, comma_loc - evt_name);
521         }
522         flags = strchr(evt_name, ':');
523         if (flags) {
524                 /* split it out: */
525                 evt_name = strndup(evt_name, flags - evt_name);
526                 flags++;
527         }
528
529         evt_length = strlen(evt_name);
530         if (evt_length >= MAX_EVENT_LENGTH)
531                 return EVT_FAILED;
532         if (strpbrk(evt_name, "*?")) {
533                 *strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
534                 return parse_multiple_tracepoint_event(opt, sys_name, evt_name,
535                                                        flags);
536         } else {
537                 return parse_single_tracepoint_event(sys_name, evt_name,
538                                                      evt_length, attr, strp);
539         }
540 }
541
542 static enum event_result
543 parse_breakpoint_type(const char *type, const char **strp,
544                       struct perf_event_attr *attr)
545 {
546         int i;
547
548         for (i = 0; i < 3; i++) {
549                 if (!type[i])
550                         break;
551
552                 switch (type[i]) {
553                 case 'r':
554                         attr->bp_type |= HW_BREAKPOINT_R;
555                         break;
556                 case 'w':
557                         attr->bp_type |= HW_BREAKPOINT_W;
558                         break;
559                 case 'x':
560                         attr->bp_type |= HW_BREAKPOINT_X;
561                         break;
562                 default:
563                         return EVT_FAILED;
564                 }
565         }
566         if (!attr->bp_type) /* Default */
567                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
568
569         *strp = type + i;
570
571         return EVT_HANDLED;
572 }
573
574 static enum event_result
575 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
576 {
577         const char *target;
578         const char *type;
579         char *endaddr;
580         u64 addr;
581         enum event_result err;
582
583         target = strchr(*strp, ':');
584         if (!target)
585                 return EVT_FAILED;
586
587         if (strncmp(*strp, "mem", target - *strp) != 0)
588                 return EVT_FAILED;
589
590         target++;
591
592         addr = strtoull(target, &endaddr, 0);
593         if (target == endaddr)
594                 return EVT_FAILED;
595
596         attr->bp_addr = addr;
597         *strp = endaddr;
598
599         type = strchr(target, ':');
600
601         /* If no type is defined, just rw as default */
602         if (!type) {
603                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
604         } else {
605                 err = parse_breakpoint_type(++type, strp, attr);
606                 if (err == EVT_FAILED)
607                         return EVT_FAILED;
608         }
609
610         /*
611          * We should find a nice way to override the access length
612          * Provide some defaults for now
613          */
614         if (attr->bp_type == HW_BREAKPOINT_X)
615                 attr->bp_len = sizeof(long);
616         else
617                 attr->bp_len = HW_BREAKPOINT_LEN_4;
618
619         attr->type = PERF_TYPE_BREAKPOINT;
620
621         return EVT_HANDLED;
622 }
623
624 static int check_events(const char *str, unsigned int i)
625 {
626         int n;
627
628         n = strlen(event_symbols[i].symbol);
629         if (!strncmp(str, event_symbols[i].symbol, n))
630                 return n;
631
632         n = strlen(event_symbols[i].alias);
633         if (n)
634                 if (!strncmp(str, event_symbols[i].alias, n))
635                         return n;
636         return 0;
637 }
638
639 static enum event_result
640 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
641 {
642         const char *str = *strp;
643         unsigned int i;
644         int n;
645
646         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
647                 n = check_events(str, i);
648                 if (n > 0) {
649                         attr->type = event_symbols[i].type;
650                         attr->config = event_symbols[i].config;
651                         *strp = str + n;
652                         return EVT_HANDLED;
653                 }
654         }
655         return EVT_FAILED;
656 }
657
658 static enum event_result
659 parse_raw_event(const char **strp, struct perf_event_attr *attr)
660 {
661         const char *str = *strp;
662         u64 config;
663         int n;
664
665         if (*str != 'r')
666                 return EVT_FAILED;
667         n = hex2u64(str + 1, &config);
668         if (n > 0) {
669                 *strp = str + n + 1;
670                 attr->type = PERF_TYPE_RAW;
671                 attr->config = config;
672                 return EVT_HANDLED;
673         }
674         return EVT_FAILED;
675 }
676
677 static enum event_result
678 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
679 {
680         const char *str = *strp;
681         char *endp;
682         unsigned long type;
683         u64 config;
684
685         type = strtoul(str, &endp, 0);
686         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
687                 str = endp + 1;
688                 config = strtoul(str, &endp, 0);
689                 if (endp > str) {
690                         attr->type = type;
691                         attr->config = config;
692                         *strp = endp;
693                         return EVT_HANDLED;
694                 }
695         }
696         return EVT_FAILED;
697 }
698
699 static enum event_result
700 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
701 {
702         const char *str = *strp;
703         int exclude = 0;
704         int eu = 0, ek = 0, eh = 0, precise = 0;
705
706         if (*str++ != ':')
707                 return 0;
708         while (*str) {
709                 if (*str == 'u') {
710                         if (!exclude)
711                                 exclude = eu = ek = eh = 1;
712                         eu = 0;
713                 } else if (*str == 'k') {
714                         if (!exclude)
715                                 exclude = eu = ek = eh = 1;
716                         ek = 0;
717                 } else if (*str == 'h') {
718                         if (!exclude)
719                                 exclude = eu = ek = eh = 1;
720                         eh = 0;
721                 } else if (*str == 'p') {
722                         precise++;
723                 } else
724                         break;
725
726                 ++str;
727         }
728         if (str >= *strp + 2) {
729                 *strp = str;
730                 attr->exclude_user   = eu;
731                 attr->exclude_kernel = ek;
732                 attr->exclude_hv     = eh;
733                 attr->precise_ip     = precise;
734                 return 1;
735         }
736         return 0;
737 }
738
739 /*
740  * Each event can have multiple symbolic names.
741  * Symbolic names are (almost) exactly matched.
742  */
743 static enum event_result
744 parse_event_symbols(const struct option *opt, const char **str,
745                     struct perf_event_attr *attr)
746 {
747         enum event_result ret;
748
749         ret = parse_tracepoint_event(opt, str, attr);
750         if (ret != EVT_FAILED)
751                 goto modifier;
752
753         ret = parse_raw_event(str, attr);
754         if (ret != EVT_FAILED)
755                 goto modifier;
756
757         ret = parse_numeric_event(str, attr);
758         if (ret != EVT_FAILED)
759                 goto modifier;
760
761         ret = parse_symbolic_event(str, attr);
762         if (ret != EVT_FAILED)
763                 goto modifier;
764
765         ret = parse_generic_hw_event(str, attr);
766         if (ret != EVT_FAILED)
767                 goto modifier;
768
769         ret = parse_breakpoint_event(str, attr);
770         if (ret != EVT_FAILED)
771                 goto modifier;
772
773         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
774         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
775         return EVT_FAILED;
776
777 modifier:
778         parse_event_modifier(str, attr);
779
780         return ret;
781 }
782
783 int parse_events(const struct option *opt, const char *str, int unset __used)
784 {
785         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
786         struct perf_event_attr attr;
787         enum event_result ret;
788         const char *ostr;
789
790         for (;;) {
791                 ostr = str;
792                 memset(&attr, 0, sizeof(attr));
793                 ret = parse_event_symbols(opt, &str, &attr);
794                 if (ret == EVT_FAILED)
795                         return -1;
796
797                 if (!(*str == 0 || *str == ',' || isspace(*str)))
798                         return -1;
799
800                 if (ret != EVT_HANDLED_ALL) {
801                         struct perf_evsel *evsel;
802                         evsel = perf_evsel__new(&attr, evlist->nr_entries);
803                         if (evsel == NULL)
804                                 return -1;
805                         perf_evlist__add(evlist, evsel);
806
807                         evsel->name = calloc(str - ostr + 1, 1);
808                         if (!evsel->name)
809                                 return -1;
810                         strncpy(evsel->name, ostr, str - ostr);
811                 }
812
813                 if (*str == 0)
814                         break;
815                 if (*str == ',')
816                         ++str;
817                 while (isspace(*str))
818                         ++str;
819         }
820
821         return 0;
822 }
823
824 int parse_filter(const struct option *opt, const char *str,
825                  int unset __used)
826 {
827         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
828         struct perf_evsel *last = NULL;
829
830         if (evlist->nr_entries > 0)
831                 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
832
833         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
834                 fprintf(stderr,
835                         "-F option should follow a -e tracepoint option\n");
836                 return -1;
837         }
838
839         last->filter = strdup(str);
840         if (last->filter == NULL) {
841                 fprintf(stderr, "not enough memory to hold filter string\n");
842                 return -1;
843         }
844
845         return 0;
846 }
847
848 static const char * const event_type_descriptors[] = {
849         "Hardware event",
850         "Software event",
851         "Tracepoint event",
852         "Hardware cache event",
853         "Raw hardware event descriptor",
854         "Hardware breakpoint",
855 };
856
857 /*
858  * Print the events from <debugfs_mount_point>/tracing/events
859  */
860
861 static void print_tracepoint_events(void)
862 {
863         DIR *sys_dir, *evt_dir;
864         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
865         char evt_path[MAXPATHLEN];
866         char dir_path[MAXPATHLEN];
867
868         if (debugfs_valid_mountpoint(debugfs_path))
869                 return;
870
871         sys_dir = opendir(debugfs_path);
872         if (!sys_dir)
873                 return;
874
875         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
876
877                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
878                          sys_dirent.d_name);
879                 evt_dir = opendir(dir_path);
880                 if (!evt_dir)
881                         continue;
882
883                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
884                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
885                                  sys_dirent.d_name, evt_dirent.d_name);
886                         printf("  %-42s [%s]\n", evt_path,
887                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
888                 }
889                 closedir(evt_dir);
890         }
891         closedir(sys_dir);
892 }
893
894 /*
895  * Check whether event is in <debugfs_mount_point>/tracing/events
896  */
897
898 int is_valid_tracepoint(const char *event_string)
899 {
900         DIR *sys_dir, *evt_dir;
901         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
902         char evt_path[MAXPATHLEN];
903         char dir_path[MAXPATHLEN];
904
905         if (debugfs_valid_mountpoint(debugfs_path))
906                 return 0;
907
908         sys_dir = opendir(debugfs_path);
909         if (!sys_dir)
910                 return 0;
911
912         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
913
914                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
915                          sys_dirent.d_name);
916                 evt_dir = opendir(dir_path);
917                 if (!evt_dir)
918                         continue;
919
920                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
921                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
922                                  sys_dirent.d_name, evt_dirent.d_name);
923                         if (!strcmp(evt_path, event_string)) {
924                                 closedir(evt_dir);
925                                 closedir(sys_dir);
926                                 return 1;
927                         }
928                 }
929                 closedir(evt_dir);
930         }
931         closedir(sys_dir);
932         return 0;
933 }
934
935 /*
936  * Print the help text for the event symbols:
937  */
938 void print_events(void)
939 {
940         struct event_symbol *syms = event_symbols;
941         unsigned int i, type, op, prev_type = -1;
942         char name[40];
943
944         printf("\n");
945         printf("List of pre-defined events (to be used in -e):\n");
946
947         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
948                 type = syms->type;
949
950                 if (type != prev_type)
951                         printf("\n");
952
953                 if (strlen(syms->alias))
954                         sprintf(name, "%s OR %s", syms->symbol, syms->alias);
955                 else
956                         strcpy(name, syms->symbol);
957                 printf("  %-42s [%s]\n", name,
958                         event_type_descriptors[type]);
959
960                 prev_type = type;
961         }
962
963         printf("\n");
964         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
965                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
966                         /* skip invalid cache type */
967                         if (!is_cache_op_valid(type, op))
968                                 continue;
969
970                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
971                                 printf("  %-42s [%s]\n",
972                                         event_cache_name(type, op, i),
973                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
974                         }
975                 }
976         }
977
978         printf("\n");
979         printf("  %-42s [%s]\n",
980                 "rNNN (see 'perf list --help' on how to encode it)",
981                event_type_descriptors[PERF_TYPE_RAW]);
982         printf("\n");
983
984         printf("  %-42s [%s]\n",
985                         "mem:<addr>[:access]",
986                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
987         printf("\n");
988
989         print_tracepoint_events();
990
991         exit(129);
992 }