?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
MIPS: Yosemite, Emma: Fix off-by-two in arcs_cmdline buffer size check
[linux-2.6/linux-mips.git] / tools / perf / util / parse-events.c
blob928918b796b2bd355799cf25926d926fea002bad
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[PERF_COUNT_HW_CACHE_MAX][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 { "node", },
97 };
98
99 static const char *hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][MAX_ALIASES] = {
100 { "load", "loads", "read", },
101 { "store", "stores", "write", },
102 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
103 };
104
105 static const char *hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX]
106 [MAX_ALIASES] = {
107 { "refs", "Reference", "ops", "access", },
108 { "misses", "miss", },
109 };
110
111 #define C(x) PERF_COUNT_HW_CACHE_##x
112 #define CACHE_READ (1 << C(OP_READ))
113 #define CACHE_WRITE (1 << C(OP_WRITE))
114 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
115 #define COP(x) (1 << x)
116
117 /*
118 * cache operartion stat
119 * L1I : Read and prefetch only
120 * ITLB and BPU : Read-only
121 */
122 static unsigned long hw_cache_stat[C(MAX)] = {
123 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
124 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
125 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
126 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
127 [C(ITLB)] = (CACHE_READ),
128 [C(BPU)] = (CACHE_READ),
129 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
130 };
131
132 #define for_each_subsystem(sys_dir, sys_dirent, sys_next) \
133 while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \
134 if (sys_dirent.d_type == DT_DIR && \
135 (strcmp(sys_dirent.d_name, ".")) && \
136 (strcmp(sys_dirent.d_name, "..")))
137
138 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
139 {
140 char evt_path[MAXPATHLEN];
141 int fd;
142
143 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
144 sys_dir->d_name, evt_dir->d_name);
145 fd = open(evt_path, O_RDONLY);
146 if (fd < 0)
147 return -EINVAL;
148 close(fd);
149
150 return 0;
151 }
152
153 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) \
154 while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \
155 if (evt_dirent.d_type == DT_DIR && \
156 (strcmp(evt_dirent.d_name, ".")) && \
157 (strcmp(evt_dirent.d_name, "..")) && \
158 (!tp_event_has_id(&sys_dirent, &evt_dirent)))
159
160 #define MAX_EVENT_LENGTH 512
161
162
163 struct tracepoint_path *tracepoint_id_to_path(u64 config)
164 {
165 struct tracepoint_path *path = NULL;
166 DIR *sys_dir, *evt_dir;
167 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
168 char id_buf[4];
169 int fd;
170 u64 id;
171 char evt_path[MAXPATHLEN];
172 char dir_path[MAXPATHLEN];
173
174 if (debugfs_valid_mountpoint(debugfs_path))
175 return NULL;
176
177 sys_dir = opendir(debugfs_path);
178 if (!sys_dir)
179 return NULL;
180
181 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
182
183 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
184 sys_dirent.d_name);
185 evt_dir = opendir(dir_path);
186 if (!evt_dir)
187 continue;
188
189 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
190
191 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
192 evt_dirent.d_name);
193 fd = open(evt_path, O_RDONLY);
194 if (fd < 0)
195 continue;
196 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
197 close(fd);
198 continue;
199 }
200 close(fd);
201 id = atoll(id_buf);
202 if (id == config) {
203 closedir(evt_dir);
204 closedir(sys_dir);
205 path = zalloc(sizeof(*path));
206 path->system = malloc(MAX_EVENT_LENGTH);
207 if (!path->system) {
208 free(path);
209 return NULL;
210 }
211 path->name = malloc(MAX_EVENT_LENGTH);
212 if (!path->name) {
213 free(path->system);
214 free(path);
215 return NULL;
216 }
217 strncpy(path->system, sys_dirent.d_name,
218 MAX_EVENT_LENGTH);
219 strncpy(path->name, evt_dirent.d_name,
220 MAX_EVENT_LENGTH);
221 return path;
222 }
223 }
224 closedir(evt_dir);
225 }
226
227 closedir(sys_dir);
228 return NULL;
229 }
230
231 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
232 static const char *tracepoint_id_to_name(u64 config)
233 {
234 static char buf[TP_PATH_LEN];
235 struct tracepoint_path *path;
236
237 path = tracepoint_id_to_path(config);
238 if (path) {
239 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
240 free(path->name);
241 free(path->system);
242 free(path);
243 } else
244 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
245
246 return buf;
247 }
248
249 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
250 {
251 if (hw_cache_stat[cache_type] & COP(cache_op))
252 return 1; /* valid */
253 else
254 return 0; /* invalid */
255 }
256
257 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
258 {
259 static char name[50];
260
261 if (cache_result) {
262 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
263 hw_cache_op[cache_op][0],
264 hw_cache_result[cache_result][0]);
265 } else {
266 sprintf(name, "%s-%s", hw_cache[cache_type][0],
267 hw_cache_op[cache_op][1]);
268 }
269
270 return name;
271 }
272
273 const char *event_type(int type)
274 {
275 switch (type) {
276 case PERF_TYPE_HARDWARE:
277 return "hardware";
278
279 case PERF_TYPE_SOFTWARE:
280 return "software";
281
282 case PERF_TYPE_TRACEPOINT:
283 return "tracepoint";
284
285 case PERF_TYPE_HW_CACHE:
286 return "hardware-cache";
287
288 default:
289 break;
290 }
291
292 return "unknown";
293 }
294
295 const char *event_name(struct perf_evsel *evsel)
296 {
297 u64 config = evsel->attr.config;
298 int type = evsel->attr.type;
299
300 if (evsel->name)
301 return evsel->name;
302
303 return __event_name(type, config);
304 }
305
306 const char *__event_name(int type, u64 config)
307 {
308 static char buf[32];
309
310 if (type == PERF_TYPE_RAW) {
311 sprintf(buf, "raw 0x%" PRIx64, config);
312 return buf;
313 }
314
315 switch (type) {
316 case PERF_TYPE_HARDWARE:
317 if (config < PERF_COUNT_HW_MAX && hw_event_names[config])
318 return hw_event_names[config];
319 return "unknown-hardware";
320
321 case PERF_TYPE_HW_CACHE: {
322 u8 cache_type, cache_op, cache_result;
323
324 cache_type = (config >> 0) & 0xff;
325 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
326 return "unknown-ext-hardware-cache-type";
327
328 cache_op = (config >> 8) & 0xff;
329 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
330 return "unknown-ext-hardware-cache-op";
331
332 cache_result = (config >> 16) & 0xff;
333 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
334 return "unknown-ext-hardware-cache-result";
335
336 if (!is_cache_op_valid(cache_type, cache_op))
337 return "invalid-cache";
338
339 return event_cache_name(cache_type, cache_op, cache_result);
340 }
341
342 case PERF_TYPE_SOFTWARE:
343 if (config < PERF_COUNT_SW_MAX && sw_event_names[config])
344 return sw_event_names[config];
345 return "unknown-software";
346
347 case PERF_TYPE_TRACEPOINT:
348 return tracepoint_id_to_name(config);
349
350 default:
351 break;
352 }
353
354 return "unknown";
355 }
356
357 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
358 {
359 int i, j;
360 int n, longest = -1;
361
362 for (i = 0; i < size; i++) {
363 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
364 n = strlen(names[i][j]);
365 if (n > longest && !strncasecmp(*str, names[i][j], n))
366 longest = n;
367 }
368 if (longest > 0) {
369 *str += longest;
370 return i;
371 }
372 }
373
374 return -1;
375 }
376
377 static enum event_result
378 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
379 {
380 const char *s = *str;
381 int cache_type = -1, cache_op = -1, cache_result = -1;
382
383 cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
384 /*
385 * No fallback - if we cannot get a clear cache type
386 * then bail out:
387 */
388 if (cache_type == -1)
389 return EVT_FAILED;
390
391 while ((cache_op == -1 || cache_result == -1) && *s == '-') {
392 ++s;
393
394 if (cache_op == -1) {
395 cache_op = parse_aliases(&s, hw_cache_op,
396 PERF_COUNT_HW_CACHE_OP_MAX);
397 if (cache_op >= 0) {
398 if (!is_cache_op_valid(cache_type, cache_op))
399 return EVT_FAILED;
400 continue;
401 }
402 }
403
404 if (cache_result == -1) {
405 cache_result = parse_aliases(&s, hw_cache_result,
406 PERF_COUNT_HW_CACHE_RESULT_MAX);
407 if (cache_result >= 0)
408 continue;
409 }
410
411 /*
412 * Can't parse this as a cache op or result, so back up
413 * to the '-'.
414 */
415 --s;
416 break;
417 }
418
419 /*
420 * Fall back to reads:
421 */
422 if (cache_op == -1)
423 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
424
425 /*
426 * Fall back to accesses:
427 */
428 if (cache_result == -1)
429 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
430
431 attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
432 attr->type = PERF_TYPE_HW_CACHE;
433
434 *str = s;
435 return EVT_HANDLED;
436 }
437
438 static enum event_result
439 parse_single_tracepoint_event(char *sys_name,
440 const char *evt_name,
441 unsigned int evt_length,
442 struct perf_event_attr *attr,
443 const char **strp)
444 {
445 char evt_path[MAXPATHLEN];
446 char id_buf[4];
447 u64 id;
448 int fd;
449
450 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
451 sys_name, evt_name);
452
453 fd = open(evt_path, O_RDONLY);
454 if (fd < 0)
455 return EVT_FAILED;
456
457 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
458 close(fd);
459 return EVT_FAILED;
460 }
461
462 close(fd);
463 id = atoll(id_buf);
464 attr->config = id;
465 attr->type = PERF_TYPE_TRACEPOINT;
466 *strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
467
468 attr->sample_type |= PERF_SAMPLE_RAW;
469 attr->sample_type |= PERF_SAMPLE_TIME;
470 attr->sample_type |= PERF_SAMPLE_CPU;
471
472 attr->sample_period = 1;
473
474
475 return EVT_HANDLED;
476 }
477
478 /* sys + ':' + event + ':' + flags*/
479 #define MAX_EVOPT_LEN (MAX_EVENT_LENGTH * 2 + 2 + 128)
480 static enum event_result
481 parse_multiple_tracepoint_event(struct perf_evlist *evlist, char *sys_name,
482 const char *evt_exp, char *flags)
483 {
484 char evt_path[MAXPATHLEN];
485 struct dirent *evt_ent;
486 DIR *evt_dir;
487
488 snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
489 evt_dir = opendir(evt_path);
490
491 if (!evt_dir) {
492 perror("Can't open event dir");
493 return EVT_FAILED;
494 }
495
496 while ((evt_ent = readdir(evt_dir))) {
497 char event_opt[MAX_EVOPT_LEN + 1];
498 int len;
499
500 if (!strcmp(evt_ent->d_name, ".")
501 || !strcmp(evt_ent->d_name, "..")
502 || !strcmp(evt_ent->d_name, "enable")
503 || !strcmp(evt_ent->d_name, "filter"))
504 continue;
505
506 if (!strglobmatch(evt_ent->d_name, evt_exp))
507 continue;
508
509 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
510 evt_ent->d_name, flags ? ":" : "",
511 flags ?: "");
512 if (len < 0)
513 return EVT_FAILED;
514
515 if (parse_events(evlist, event_opt, 0))
516 return EVT_FAILED;
517 }
518
519 return EVT_HANDLED_ALL;
520 }
521
522 static enum event_result
523 parse_tracepoint_event(struct perf_evlist *evlist, const char **strp,
524 struct perf_event_attr *attr)
525 {
526 const char *evt_name;
527 char *flags = NULL, *comma_loc;
528 char sys_name[MAX_EVENT_LENGTH];
529 unsigned int sys_length, evt_length;
530
531 if (debugfs_valid_mountpoint(debugfs_path))
532 return 0;
533
534 evt_name = strchr(*strp, ':');
535 if (!evt_name)
536 return EVT_FAILED;
537
538 sys_length = evt_name - *strp;
539 if (sys_length >= MAX_EVENT_LENGTH)
540 return 0;
541
542 strncpy(sys_name, *strp, sys_length);
543 sys_name[sys_length] = '\0';
544 evt_name = evt_name + 1;
545
546 comma_loc = strchr(evt_name, ',');
547 if (comma_loc) {
548 /* take the event name up to the comma */
549 evt_name = strndup(evt_name, comma_loc - evt_name);
550 }
551 flags = strchr(evt_name, ':');
552 if (flags) {
553 /* split it out: */
554 evt_name = strndup(evt_name, flags - evt_name);
555 flags++;
556 }
557
558 evt_length = strlen(evt_name);
559 if (evt_length >= MAX_EVENT_LENGTH)
560 return EVT_FAILED;
561 if (strpbrk(evt_name, "*?")) {
562 *strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
563 return parse_multiple_tracepoint_event(evlist, sys_name,
564 evt_name, flags);
565 } else {
566 return parse_single_tracepoint_event(sys_name, evt_name,
567 evt_length, attr, strp);
568 }
569 }
570
571 static enum event_result
572 parse_breakpoint_type(const char *type, const char **strp,
573 struct perf_event_attr *attr)
574 {
575 int i;
576
577 for (i = 0; i < 3; i++) {
578 if (!type[i])
579 break;
580
581 switch (type[i]) {
582 case 'r':
583 attr->bp_type |= HW_BREAKPOINT_R;
584 break;
585 case 'w':
586 attr->bp_type |= HW_BREAKPOINT_W;
587 break;
588 case 'x':
589 attr->bp_type |= HW_BREAKPOINT_X;
590 break;
591 default:
592 return EVT_FAILED;
593 }
594 }
595 if (!attr->bp_type) /* Default */
596 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
597
598 *strp = type + i;
599
600 return EVT_HANDLED;
601 }
602
603 static enum event_result
604 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
605 {
606 const char *target;
607 const char *type;
608 char *endaddr;
609 u64 addr;
610 enum event_result err;
611
612 target = strchr(*strp, ':');
613 if (!target)
614 return EVT_FAILED;
615
616 if (strncmp(*strp, "mem", target - *strp) != 0)
617 return EVT_FAILED;
618
619 target++;
620
621 addr = strtoull(target, &endaddr, 0);
622 if (target == endaddr)
623 return EVT_FAILED;
624
625 attr->bp_addr = addr;
626 *strp = endaddr;
627
628 type = strchr(target, ':');
629
630 /* If no type is defined, just rw as default */
631 if (!type) {
632 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
633 } else {
634 err = parse_breakpoint_type(++type, strp, attr);
635 if (err == EVT_FAILED)
636 return EVT_FAILED;
637 }
638
639 /*
640 * We should find a nice way to override the access length
641 * Provide some defaults for now
642 */
643 if (attr->bp_type == HW_BREAKPOINT_X)
644 attr->bp_len = sizeof(long);
645 else
646 attr->bp_len = HW_BREAKPOINT_LEN_4;
647
648 attr->type = PERF_TYPE_BREAKPOINT;
649
650 return EVT_HANDLED;
651 }
652
653 static int check_events(const char *str, unsigned int i)
654 {
655 int n;
656
657 n = strlen(event_symbols[i].symbol);
658 if (!strncasecmp(str, event_symbols[i].symbol, n))
659 return n;
660
661 n = strlen(event_symbols[i].alias);
662 if (n) {
663 if (!strncasecmp(str, event_symbols[i].alias, n))
664 return n;
665 }
666
667 return 0;
668 }
669
670 static enum event_result
671 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
672 {
673 const char *str = *strp;
674 unsigned int i;
675 int n;
676
677 for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
678 n = check_events(str, i);
679 if (n > 0) {
680 attr->type = event_symbols[i].type;
681 attr->config = event_symbols[i].config;
682 *strp = str + n;
683 return EVT_HANDLED;
684 }
685 }
686 return EVT_FAILED;
687 }
688
689 static enum event_result
690 parse_raw_event(const char **strp, struct perf_event_attr *attr)
691 {
692 const char *str = *strp;
693 u64 config;
694 int n;
695
696 if (*str != 'r')
697 return EVT_FAILED;
698 n = hex2u64(str + 1, &config);
699 if (n > 0) {
700 const char *end = str + n + 1;
701 if (*end != '\0' && *end != ',' && *end != ':')
702 return EVT_FAILED;
703
704 *strp = end;
705 attr->type = PERF_TYPE_RAW;
706 attr->config = config;
707 return EVT_HANDLED;
708 }
709 return EVT_FAILED;
710 }
711
712 static enum event_result
713 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
714 {
715 const char *str = *strp;
716 char *endp;
717 unsigned long type;
718 u64 config;
719
720 type = strtoul(str, &endp, 0);
721 if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
722 str = endp + 1;
723 config = strtoul(str, &endp, 0);
724 if (endp > str) {
725 attr->type = type;
726 attr->config = config;
727 *strp = endp;
728 return EVT_HANDLED;
729 }
730 }
731 return EVT_FAILED;
732 }
733
734 static int
735 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
736 {
737 const char *str = *strp;
738 int exclude = 0;
739 int eu = 0, ek = 0, eh = 0, precise = 0;
740
741 if (!*str)
742 return 0;
743
744 if (*str == ',')
745 return 0;
746
747 if (*str++ != ':')
748 return -1;
749
750 while (*str) {
751 if (*str == 'u') {
752 if (!exclude)
753 exclude = eu = ek = eh = 1;
754 eu = 0;
755 } else if (*str == 'k') {
756 if (!exclude)
757 exclude = eu = ek = eh = 1;
758 ek = 0;
759 } else if (*str == 'h') {
760 if (!exclude)
761 exclude = eu = ek = eh = 1;
762 eh = 0;
763 } else if (*str == 'p') {
764 precise++;
765 } else
766 break;
767
768 ++str;
769 }
770 if (str < *strp + 2)
771 return -1;
772
773 *strp = str;
774
775 attr->exclude_user = eu;
776 attr->exclude_kernel = ek;
777 attr->exclude_hv = eh;
778 attr->precise_ip = precise;
779
780 return 0;
781 }
782
783 /*
784 * Each event can have multiple symbolic names.
785 * Symbolic names are (almost) exactly matched.
786 */
787 static enum event_result
788 parse_event_symbols(struct perf_evlist *evlist, const char **str,
789 struct perf_event_attr *attr)
790 {
791 enum event_result ret;
792
793 ret = parse_tracepoint_event(evlist, str, attr);
794 if (ret != EVT_FAILED)
795 goto modifier;
796
797 ret = parse_raw_event(str, attr);
798 if (ret != EVT_FAILED)
799 goto modifier;
800
801 ret = parse_numeric_event(str, attr);
802 if (ret != EVT_FAILED)
803 goto modifier;
804
805 ret = parse_symbolic_event(str, attr);
806 if (ret != EVT_FAILED)
807 goto modifier;
808
809 ret = parse_generic_hw_event(str, attr);
810 if (ret != EVT_FAILED)
811 goto modifier;
812
813 ret = parse_breakpoint_event(str, attr);
814 if (ret != EVT_FAILED)
815 goto modifier;
816
817 fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
818 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
819 return EVT_FAILED;
820
821 modifier:
822 if (parse_event_modifier(str, attr) < 0) {
823 fprintf(stderr, "invalid event modifier: '%s'\n", *str);
824 fprintf(stderr, "Run 'perf list' for a list of valid events and modifiers\n");
825
826 return EVT_FAILED;
827 }
828
829 return ret;
830 }
831
832 int parse_events(struct perf_evlist *evlist , const char *str, int unset __used)
833 {
834 struct perf_event_attr attr;
835 enum event_result ret;
836 const char *ostr;
837
838 for (;;) {
839 ostr = str;
840 memset(&attr, 0, sizeof(attr));
841 ret = parse_event_symbols(evlist, &str, &attr);
842 if (ret == EVT_FAILED)
843 return -1;
844
845 if (!(*str == 0 || *str == ',' || isspace(*str)))
846 return -1;
847
848 if (ret != EVT_HANDLED_ALL) {
849 struct perf_evsel *evsel;
850 evsel = perf_evsel__new(&attr, evlist->nr_entries);
851 if (evsel == NULL)
852 return -1;
853 perf_evlist__add(evlist, evsel);
854
855 evsel->name = calloc(str - ostr + 1, 1);
856 if (!evsel->name)
857 return -1;
858 strncpy(evsel->name, ostr, str - ostr);
859 }
860
861 if (*str == 0)
862 break;
863 if (*str == ',')
864 ++str;
865 while (isspace(*str))
866 ++str;
867 }
868
869 return 0;
870 }
871
872 int parse_events_option(const struct option *opt, const char *str,
873 int unset __used)
874 {
875 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
876 return parse_events(evlist, str, unset);
877 }
878
879 int parse_filter(const struct option *opt, const char *str,
880 int unset __used)
881 {
882 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
883 struct perf_evsel *last = NULL;
884
885 if (evlist->nr_entries > 0)
886 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
887
888 if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
889 fprintf(stderr,
890 "-F option should follow a -e tracepoint option\n");
891 return -1;
892 }
893
894 last->filter = strdup(str);
895 if (last->filter == NULL) {
896 fprintf(stderr, "not enough memory to hold filter string\n");
897 return -1;
898 }
899
900 return 0;
901 }
902
903 static const char * const event_type_descriptors[] = {
904 "Hardware event",
905 "Software event",
906 "Tracepoint event",
907 "Hardware cache event",
908 "Raw hardware event descriptor",
909 "Hardware breakpoint",
910 };
911
912 /*
913 * Print the events from <debugfs_mount_point>/tracing/events
914 */
915
916 void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
917 {
918 DIR *sys_dir, *evt_dir;
919 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
920 char evt_path[MAXPATHLEN];
921 char dir_path[MAXPATHLEN];
922
923 if (debugfs_valid_mountpoint(debugfs_path))
924 return;
925
926 sys_dir = opendir(debugfs_path);
927 if (!sys_dir)
928 return;
929
930 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
931 if (subsys_glob != NULL &&
932 !strglobmatch(sys_dirent.d_name, subsys_glob))
933 continue;
934
935 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
936 sys_dirent.d_name);
937 evt_dir = opendir(dir_path);
938 if (!evt_dir)
939 continue;
940
941 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
942 if (event_glob != NULL &&
943 !strglobmatch(evt_dirent.d_name, event_glob))
944 continue;
945
946 snprintf(evt_path, MAXPATHLEN, "%s:%s",
947 sys_dirent.d_name, evt_dirent.d_name);
948 printf(" %-50s [%s]\n", evt_path,
949 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
950 }
951 closedir(evt_dir);
952 }
953 closedir(sys_dir);
954 }
955
956 /*
957 * Check whether event is in <debugfs_mount_point>/tracing/events
958 */
959
960 int is_valid_tracepoint(const char *event_string)
961 {
962 DIR *sys_dir, *evt_dir;
963 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
964 char evt_path[MAXPATHLEN];
965 char dir_path[MAXPATHLEN];
966
967 if (debugfs_valid_mountpoint(debugfs_path))
968 return 0;
969
970 sys_dir = opendir(debugfs_path);
971 if (!sys_dir)
972 return 0;
973
974 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
975
976 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
977 sys_dirent.d_name);
978 evt_dir = opendir(dir_path);
979 if (!evt_dir)
980 continue;
981
982 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
983 snprintf(evt_path, MAXPATHLEN, "%s:%s",
984 sys_dirent.d_name, evt_dirent.d_name);
985 if (!strcmp(evt_path, event_string)) {
986 closedir(evt_dir);
987 closedir(sys_dir);
988 return 1;
989 }
990 }
991 closedir(evt_dir);
992 }
993 closedir(sys_dir);
994 return 0;
995 }
996
997 void print_events_type(u8 type)
998 {
999 struct event_symbol *syms = event_symbols;
1000 unsigned int i;
1001 char name[64];
1002
1003 for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1004 if (type != syms->type)
1005 continue;
1006
1007 if (strlen(syms->alias))
1008 snprintf(name, sizeof(name), "%s OR %s",
1009 syms->symbol, syms->alias);
1010 else
1011 snprintf(name, sizeof(name), "%s", syms->symbol);
1012
1013 printf(" %-50s [%s]\n", name,
1014 event_type_descriptors[type]);
1015 }
1016 }
1017
1018 int print_hwcache_events(const char *event_glob)
1019 {
1020 unsigned int type, op, i, printed = 0;
1021
1022 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1023 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1024 /* skip invalid cache type */
1025 if (!is_cache_op_valid(type, op))
1026 continue;
1027
1028 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1029 char *name = event_cache_name(type, op, i);
1030
1031 if (event_glob != NULL && !strglobmatch(name, event_glob))
1032 continue;
1033
1034 printf(" %-50s [%s]\n", name,
1035 event_type_descriptors[PERF_TYPE_HW_CACHE]);
1036 ++printed;
1037 }
1038 }
1039 }
1040
1041 return printed;
1042 }
1043
1044 #define MAX_NAME_LEN 100
1045
1046 /*
1047 * Print the help text for the event symbols:
1048 */
1049 void print_events(const char *event_glob)
1050 {
1051 unsigned int i, type, prev_type = -1, printed = 0, ntypes_printed = 0;
1052 struct event_symbol *syms = event_symbols;
1053 char name[MAX_NAME_LEN];
1054
1055 printf("\n");
1056 printf("List of pre-defined events (to be used in -e):\n");
1057
1058 for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1059 type = syms->type;
1060
1061 if (type != prev_type && printed) {
1062 printf("\n");
1063 printed = 0;
1064 ntypes_printed++;
1065 }
1066
1067 if (event_glob != NULL &&
1068 !(strglobmatch(syms->symbol, event_glob) ||
1069 (syms->alias && strglobmatch(syms->alias, event_glob))))
1070 continue;
1071
1072 if (strlen(syms->alias))
1073 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1074 else
1075 strncpy(name, syms->symbol, MAX_NAME_LEN);
1076 printf(" %-50s [%s]\n", name,
1077 event_type_descriptors[type]);
1078
1079 prev_type = type;
1080 ++printed;
1081 }
1082
1083 if (ntypes_printed) {
1084 printed = 0;
1085 printf("\n");
1086 }
1087 print_hwcache_events(event_glob);
1088
1089 if (event_glob != NULL)
1090 return;
1091
1092 printf("\n");
1093 printf(" %-50s [%s]\n",
1094 "rNNN (see 'perf list --help' on how to encode it)",
1095 event_type_descriptors[PERF_TYPE_RAW]);
1096 printf("\n");
1097
1098 printf(" %-50s [%s]\n",
1099 "mem:<addr>[:access]",
1100 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1101 printf("\n");
1102
1103 print_tracepoint_events(NULL, NULL);
1104 }
Mirror of the linux-mips.org kernel tree