perf evsel: Introduce perf_evlist
[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         return __event_name(type, config);
272 }
273
274 const char *__event_name(int type, u64 config)
275 {
276         static char buf[32];
277
278         if (type == PERF_TYPE_RAW) {
279                 sprintf(buf, "raw 0x%" PRIx64, config);
280                 return buf;
281         }
282
283         switch (type) {
284         case PERF_TYPE_HARDWARE:
285                 if (config < PERF_COUNT_HW_MAX)
286                         return hw_event_names[config];
287                 return "unknown-hardware";
288
289         case PERF_TYPE_HW_CACHE: {
290                 u8 cache_type, cache_op, cache_result;
291
292                 cache_type   = (config >>  0) & 0xff;
293                 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
294                         return "unknown-ext-hardware-cache-type";
295
296                 cache_op     = (config >>  8) & 0xff;
297                 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
298                         return "unknown-ext-hardware-cache-op";
299
300                 cache_result = (config >> 16) & 0xff;
301                 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
302                         return "unknown-ext-hardware-cache-result";
303
304                 if (!is_cache_op_valid(cache_type, cache_op))
305                         return "invalid-cache";
306
307                 return event_cache_name(cache_type, cache_op, cache_result);
308         }
309
310         case PERF_TYPE_SOFTWARE:
311                 if (config < PERF_COUNT_SW_MAX)
312                         return sw_event_names[config];
313                 return "unknown-software";
314
315         case PERF_TYPE_TRACEPOINT:
316                 return tracepoint_id_to_name(config);
317
318         default:
319                 break;
320         }
321
322         return "unknown";
323 }
324
325 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
326 {
327         int i, j;
328         int n, longest = -1;
329
330         for (i = 0; i < size; i++) {
331                 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
332                         n = strlen(names[i][j]);
333                         if (n > longest && !strncasecmp(*str, names[i][j], n))
334                                 longest = n;
335                 }
336                 if (longest > 0) {
337                         *str += longest;
338                         return i;
339                 }
340         }
341
342         return -1;
343 }
344
345 static enum event_result
346 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
347 {
348         const char *s = *str;
349         int cache_type = -1, cache_op = -1, cache_result = -1;
350
351         cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
352         /*
353          * No fallback - if we cannot get a clear cache type
354          * then bail out:
355          */
356         if (cache_type == -1)
357                 return EVT_FAILED;
358
359         while ((cache_op == -1 || cache_result == -1) && *s == '-') {
360                 ++s;
361
362                 if (cache_op == -1) {
363                         cache_op = parse_aliases(&s, hw_cache_op,
364                                                 PERF_COUNT_HW_CACHE_OP_MAX);
365                         if (cache_op >= 0) {
366                                 if (!is_cache_op_valid(cache_type, cache_op))
367                                         return 0;
368                                 continue;
369                         }
370                 }
371
372                 if (cache_result == -1) {
373                         cache_result = parse_aliases(&s, hw_cache_result,
374                                                 PERF_COUNT_HW_CACHE_RESULT_MAX);
375                         if (cache_result >= 0)
376                                 continue;
377                 }
378
379                 /*
380                  * Can't parse this as a cache op or result, so back up
381                  * to the '-'.
382                  */
383                 --s;
384                 break;
385         }
386
387         /*
388          * Fall back to reads:
389          */
390         if (cache_op == -1)
391                 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
392
393         /*
394          * Fall back to accesses:
395          */
396         if (cache_result == -1)
397                 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
398
399         attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
400         attr->type = PERF_TYPE_HW_CACHE;
401
402         *str = s;
403         return EVT_HANDLED;
404 }
405
406 static enum event_result
407 parse_single_tracepoint_event(char *sys_name,
408                               const char *evt_name,
409                               unsigned int evt_length,
410                               struct perf_event_attr *attr,
411                               const char **strp)
412 {
413         char evt_path[MAXPATHLEN];
414         char id_buf[4];
415         u64 id;
416         int fd;
417
418         snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
419                  sys_name, evt_name);
420
421         fd = open(evt_path, O_RDONLY);
422         if (fd < 0)
423                 return EVT_FAILED;
424
425         if (read(fd, id_buf, sizeof(id_buf)) < 0) {
426                 close(fd);
427                 return EVT_FAILED;
428         }
429
430         close(fd);
431         id = atoll(id_buf);
432         attr->config = id;
433         attr->type = PERF_TYPE_TRACEPOINT;
434         *strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
435
436         attr->sample_type |= PERF_SAMPLE_RAW;
437         attr->sample_type |= PERF_SAMPLE_TIME;
438         attr->sample_type |= PERF_SAMPLE_CPU;
439
440         attr->sample_period = 1;
441
442
443         return EVT_HANDLED;
444 }
445
446 /* sys + ':' + event + ':' + flags*/
447 #define MAX_EVOPT_LEN   (MAX_EVENT_LENGTH * 2 + 2 + 128)
448 static enum event_result
449 parse_multiple_tracepoint_event(char *sys_name, const char *evt_exp,
450                                 char *flags)
451 {
452         char evt_path[MAXPATHLEN];
453         struct dirent *evt_ent;
454         DIR *evt_dir;
455
456         snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
457         evt_dir = opendir(evt_path);
458
459         if (!evt_dir) {
460                 perror("Can't open event dir");
461                 return EVT_FAILED;
462         }
463
464         while ((evt_ent = readdir(evt_dir))) {
465                 char event_opt[MAX_EVOPT_LEN + 1];
466                 int len;
467
468                 if (!strcmp(evt_ent->d_name, ".")
469                     || !strcmp(evt_ent->d_name, "..")
470                     || !strcmp(evt_ent->d_name, "enable")
471                     || !strcmp(evt_ent->d_name, "filter"))
472                         continue;
473
474                 if (!strglobmatch(evt_ent->d_name, evt_exp))
475                         continue;
476
477                 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
478                                evt_ent->d_name, flags ? ":" : "",
479                                flags ?: "");
480                 if (len < 0)
481                         return EVT_FAILED;
482
483                 if (parse_events(NULL, event_opt, 0))
484                         return EVT_FAILED;
485         }
486
487         return EVT_HANDLED_ALL;
488 }
489
490 static enum event_result parse_tracepoint_event(const char **strp,
491                                     struct perf_event_attr *attr)
492 {
493         const char *evt_name;
494         char *flags = NULL, *comma_loc;
495         char sys_name[MAX_EVENT_LENGTH];
496         unsigned int sys_length, evt_length;
497
498         if (debugfs_valid_mountpoint(debugfs_path))
499                 return 0;
500
501         evt_name = strchr(*strp, ':');
502         if (!evt_name)
503                 return EVT_FAILED;
504
505         sys_length = evt_name - *strp;
506         if (sys_length >= MAX_EVENT_LENGTH)
507                 return 0;
508
509         strncpy(sys_name, *strp, sys_length);
510         sys_name[sys_length] = '\0';
511         evt_name = evt_name + 1;
512
513         comma_loc = strchr(evt_name, ',');
514         if (comma_loc) {
515                 /* take the event name up to the comma */
516                 evt_name = strndup(evt_name, comma_loc - evt_name);
517         }
518         flags = strchr(evt_name, ':');
519         if (flags) {
520                 /* split it out: */
521                 evt_name = strndup(evt_name, flags - evt_name);
522                 flags++;
523         }
524
525         evt_length = strlen(evt_name);
526         if (evt_length >= MAX_EVENT_LENGTH)
527                 return EVT_FAILED;
528         if (strpbrk(evt_name, "*?")) {
529                 *strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
530                 return parse_multiple_tracepoint_event(sys_name, evt_name,
531                                                        flags);
532         } else {
533                 return parse_single_tracepoint_event(sys_name, evt_name,
534                                                      evt_length, attr, strp);
535         }
536 }
537
538 static enum event_result
539 parse_breakpoint_type(const char *type, const char **strp,
540                       struct perf_event_attr *attr)
541 {
542         int i;
543
544         for (i = 0; i < 3; i++) {
545                 if (!type[i])
546                         break;
547
548                 switch (type[i]) {
549                 case 'r':
550                         attr->bp_type |= HW_BREAKPOINT_R;
551                         break;
552                 case 'w':
553                         attr->bp_type |= HW_BREAKPOINT_W;
554                         break;
555                 case 'x':
556                         attr->bp_type |= HW_BREAKPOINT_X;
557                         break;
558                 default:
559                         return EVT_FAILED;
560                 }
561         }
562         if (!attr->bp_type) /* Default */
563                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
564
565         *strp = type + i;
566
567         return EVT_HANDLED;
568 }
569
570 static enum event_result
571 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
572 {
573         const char *target;
574         const char *type;
575         char *endaddr;
576         u64 addr;
577         enum event_result err;
578
579         target = strchr(*strp, ':');
580         if (!target)
581                 return EVT_FAILED;
582
583         if (strncmp(*strp, "mem", target - *strp) != 0)
584                 return EVT_FAILED;
585
586         target++;
587
588         addr = strtoull(target, &endaddr, 0);
589         if (target == endaddr)
590                 return EVT_FAILED;
591
592         attr->bp_addr = addr;
593         *strp = endaddr;
594
595         type = strchr(target, ':');
596
597         /* If no type is defined, just rw as default */
598         if (!type) {
599                 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
600         } else {
601                 err = parse_breakpoint_type(++type, strp, attr);
602                 if (err == EVT_FAILED)
603                         return EVT_FAILED;
604         }
605
606         /*
607          * We should find a nice way to override the access length
608          * Provide some defaults for now
609          */
610         if (attr->bp_type == HW_BREAKPOINT_X)
611                 attr->bp_len = sizeof(long);
612         else
613                 attr->bp_len = HW_BREAKPOINT_LEN_4;
614
615         attr->type = PERF_TYPE_BREAKPOINT;
616
617         return EVT_HANDLED;
618 }
619
620 static int check_events(const char *str, unsigned int i)
621 {
622         int n;
623
624         n = strlen(event_symbols[i].symbol);
625         if (!strncmp(str, event_symbols[i].symbol, n))
626                 return n;
627
628         n = strlen(event_symbols[i].alias);
629         if (n)
630                 if (!strncmp(str, event_symbols[i].alias, n))
631                         return n;
632         return 0;
633 }
634
635 static enum event_result
636 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
637 {
638         const char *str = *strp;
639         unsigned int i;
640         int n;
641
642         for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
643                 n = check_events(str, i);
644                 if (n > 0) {
645                         attr->type = event_symbols[i].type;
646                         attr->config = event_symbols[i].config;
647                         *strp = str + n;
648                         return EVT_HANDLED;
649                 }
650         }
651         return EVT_FAILED;
652 }
653
654 static enum event_result
655 parse_raw_event(const char **strp, struct perf_event_attr *attr)
656 {
657         const char *str = *strp;
658         u64 config;
659         int n;
660
661         if (*str != 'r')
662                 return EVT_FAILED;
663         n = hex2u64(str + 1, &config);
664         if (n > 0) {
665                 *strp = str + n + 1;
666                 attr->type = PERF_TYPE_RAW;
667                 attr->config = config;
668                 return EVT_HANDLED;
669         }
670         return EVT_FAILED;
671 }
672
673 static enum event_result
674 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
675 {
676         const char *str = *strp;
677         char *endp;
678         unsigned long type;
679         u64 config;
680
681         type = strtoul(str, &endp, 0);
682         if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
683                 str = endp + 1;
684                 config = strtoul(str, &endp, 0);
685                 if (endp > str) {
686                         attr->type = type;
687                         attr->config = config;
688                         *strp = endp;
689                         return EVT_HANDLED;
690                 }
691         }
692         return EVT_FAILED;
693 }
694
695 static enum event_result
696 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
697 {
698         const char *str = *strp;
699         int exclude = 0;
700         int eu = 0, ek = 0, eh = 0, precise = 0;
701
702         if (*str++ != ':')
703                 return 0;
704         while (*str) {
705                 if (*str == 'u') {
706                         if (!exclude)
707                                 exclude = eu = ek = eh = 1;
708                         eu = 0;
709                 } else if (*str == 'k') {
710                         if (!exclude)
711                                 exclude = eu = ek = eh = 1;
712                         ek = 0;
713                 } else if (*str == 'h') {
714                         if (!exclude)
715                                 exclude = eu = ek = eh = 1;
716                         eh = 0;
717                 } else if (*str == 'p') {
718                         precise++;
719                 } else
720                         break;
721
722                 ++str;
723         }
724         if (str >= *strp + 2) {
725                 *strp = str;
726                 attr->exclude_user   = eu;
727                 attr->exclude_kernel = ek;
728                 attr->exclude_hv     = eh;
729                 attr->precise_ip     = precise;
730                 return 1;
731         }
732         return 0;
733 }
734
735 /*
736  * Each event can have multiple symbolic names.
737  * Symbolic names are (almost) exactly matched.
738  */
739 static enum event_result
740 parse_event_symbols(const char **str, struct perf_event_attr *attr)
741 {
742         enum event_result ret;
743
744         ret = parse_tracepoint_event(str, attr);
745         if (ret != EVT_FAILED)
746                 goto modifier;
747
748         ret = parse_raw_event(str, attr);
749         if (ret != EVT_FAILED)
750                 goto modifier;
751
752         ret = parse_numeric_event(str, attr);
753         if (ret != EVT_FAILED)
754                 goto modifier;
755
756         ret = parse_symbolic_event(str, attr);
757         if (ret != EVT_FAILED)
758                 goto modifier;
759
760         ret = parse_generic_hw_event(str, attr);
761         if (ret != EVT_FAILED)
762                 goto modifier;
763
764         ret = parse_breakpoint_event(str, attr);
765         if (ret != EVT_FAILED)
766                 goto modifier;
767
768         fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
769         fprintf(stderr, "Run 'perf list' for a list of valid events\n");
770         return EVT_FAILED;
771
772 modifier:
773         parse_event_modifier(str, attr);
774
775         return ret;
776 }
777
778 int parse_events(const struct option *opt, const char *str, int unset __used)
779 {
780         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
781         struct perf_event_attr attr;
782         enum event_result ret;
783
784         for (;;) {
785                 memset(&attr, 0, sizeof(attr));
786                 ret = parse_event_symbols(&str, &attr);
787                 if (ret == EVT_FAILED)
788                         return -1;
789
790                 if (!(*str == 0 || *str == ',' || isspace(*str)))
791                         return -1;
792
793                 if (ret != EVT_HANDLED_ALL) {
794                         struct perf_evsel *evsel;
795                         evsel = perf_evsel__new(&attr, evlist->nr_entries);
796                         if (evsel == NULL)
797                                 return -1;
798                         perf_evlist__add(evlist, evsel);
799                 }
800
801                 if (*str == 0)
802                         break;
803                 if (*str == ',')
804                         ++str;
805                 while (isspace(*str))
806                         ++str;
807         }
808
809         return 0;
810 }
811
812 int parse_filter(const struct option *opt, const char *str,
813                  int unset __used)
814 {
815         struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
816         struct perf_evsel *last = NULL;
817
818         if (evlist->nr_entries > 0)
819                 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
820
821         if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
822                 fprintf(stderr,
823                         "-F option should follow a -e tracepoint option\n");
824                 return -1;
825         }
826
827         last->filter = strdup(str);
828         if (last->filter == NULL) {
829                 fprintf(stderr, "not enough memory to hold filter string\n");
830                 return -1;
831         }
832
833         return 0;
834 }
835
836 static const char * const event_type_descriptors[] = {
837         "Hardware event",
838         "Software event",
839         "Tracepoint event",
840         "Hardware cache event",
841         "Raw hardware event descriptor",
842         "Hardware breakpoint",
843 };
844
845 /*
846  * Print the events from <debugfs_mount_point>/tracing/events
847  */
848
849 static void print_tracepoint_events(void)
850 {
851         DIR *sys_dir, *evt_dir;
852         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
853         char evt_path[MAXPATHLEN];
854         char dir_path[MAXPATHLEN];
855
856         if (debugfs_valid_mountpoint(debugfs_path))
857                 return;
858
859         sys_dir = opendir(debugfs_path);
860         if (!sys_dir)
861                 return;
862
863         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
864
865                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
866                          sys_dirent.d_name);
867                 evt_dir = opendir(dir_path);
868                 if (!evt_dir)
869                         continue;
870
871                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
872                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
873                                  sys_dirent.d_name, evt_dirent.d_name);
874                         printf("  %-42s [%s]\n", evt_path,
875                                 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
876                 }
877                 closedir(evt_dir);
878         }
879         closedir(sys_dir);
880 }
881
882 /*
883  * Check whether event is in <debugfs_mount_point>/tracing/events
884  */
885
886 int is_valid_tracepoint(const char *event_string)
887 {
888         DIR *sys_dir, *evt_dir;
889         struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
890         char evt_path[MAXPATHLEN];
891         char dir_path[MAXPATHLEN];
892
893         if (debugfs_valid_mountpoint(debugfs_path))
894                 return 0;
895
896         sys_dir = opendir(debugfs_path);
897         if (!sys_dir)
898                 return 0;
899
900         for_each_subsystem(sys_dir, sys_dirent, sys_next) {
901
902                 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
903                          sys_dirent.d_name);
904                 evt_dir = opendir(dir_path);
905                 if (!evt_dir)
906                         continue;
907
908                 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
909                         snprintf(evt_path, MAXPATHLEN, "%s:%s",
910                                  sys_dirent.d_name, evt_dirent.d_name);
911                         if (!strcmp(evt_path, event_string)) {
912                                 closedir(evt_dir);
913                                 closedir(sys_dir);
914                                 return 1;
915                         }
916                 }
917                 closedir(evt_dir);
918         }
919         closedir(sys_dir);
920         return 0;
921 }
922
923 /*
924  * Print the help text for the event symbols:
925  */
926 void print_events(void)
927 {
928         struct event_symbol *syms = event_symbols;
929         unsigned int i, type, op, prev_type = -1;
930         char name[40];
931
932         printf("\n");
933         printf("List of pre-defined events (to be used in -e):\n");
934
935         for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
936                 type = syms->type;
937
938                 if (type != prev_type)
939                         printf("\n");
940
941                 if (strlen(syms->alias))
942                         sprintf(name, "%s OR %s", syms->symbol, syms->alias);
943                 else
944                         strcpy(name, syms->symbol);
945                 printf("  %-42s [%s]\n", name,
946                         event_type_descriptors[type]);
947
948                 prev_type = type;
949         }
950
951         printf("\n");
952         for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
953                 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
954                         /* skip invalid cache type */
955                         if (!is_cache_op_valid(type, op))
956                                 continue;
957
958                         for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
959                                 printf("  %-42s [%s]\n",
960                                         event_cache_name(type, op, i),
961                                         event_type_descriptors[PERF_TYPE_HW_CACHE]);
962                         }
963                 }
964         }
965
966         printf("\n");
967         printf("  %-42s [%s]\n",
968                 "rNNN (see 'perf list --help' on how to encode it)",
969                event_type_descriptors[PERF_TYPE_RAW]);
970         printf("\n");
971
972         printf("  %-42s [%s]\n",
973                         "mem:<addr>[:access]",
974                         event_type_descriptors[PERF_TYPE_BREAKPOINT]);
975         printf("\n");
976
977         print_tracepoint_events();
978
979         exit(129);
980 }