1 /* ANDROID_CHANGE_BEGIN */
2 #if 0
3 #include "../../../include/linux/hw_breakpoint.h"
4 #else
5 #include "include/linux/added/hw_breakpoint.h"
6 #endif
7 /* ANDROID_CHANGE_END */
8 #include "util.h"
9 #include "../perf.h"
10 #include "evlist.h"
11 #include "evsel.h"
12 #include "parse-options.h"
13 #include "parse-events.h"
14 #include "exec_cmd.h"
15 #include "string.h"
16 #include "symbol.h"
17 #include "cache.h"
18 #include "header.h"
19 #include "debugfs.h"
20
21 struct event_symbol {
22 u8 type;
23 u64 config;
24 const char *symbol;
25 const char *alias;
26 };
27
28 enum event_result {
29 EVT_FAILED,
30 EVT_HANDLED,
31 EVT_HANDLED_ALL
32 };
33
34 char debugfs_path[MAXPATHLEN];
35
36 #define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
37 #define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
38
39 static struct event_symbol event_symbols[] = {
40 { CHW(CPU_CYCLES), "cpu-cycles", "cycles" },
41 { CHW(STALLED_CYCLES_FRONTEND), "stalled-cycles-frontend", "idle-cycles-frontend" },
42 { CHW(STALLED_CYCLES_BACKEND), "stalled-cycles-backend", "idle-cycles-backend" },
43 { CHW(INSTRUCTIONS), "instructions", "" },
44 { CHW(CACHE_REFERENCES), "cache-references", "" },
45 { CHW(CACHE_MISSES), "cache-misses", "" },
46 { CHW(BRANCH_INSTRUCTIONS), "branch-instructions", "branches" },
47 { CHW(BRANCH_MISSES), "branch-misses", "" },
48 { CHW(BUS_CYCLES), "bus-cycles", "" },
49
50 { CSW(CPU_CLOCK), "cpu-clock", "" },
51 { CSW(TASK_CLOCK), "task-clock", "" },
52 { CSW(PAGE_FAULTS), "page-faults", "faults" },
53 { CSW(PAGE_FAULTS_MIN), "minor-faults", "" },
54 { CSW(PAGE_FAULTS_MAJ), "major-faults", "" },
55 { CSW(CONTEXT_SWITCHES), "context-switches", "cs" },
56 { CSW(CPU_MIGRATIONS), "cpu-migrations", "migrations" },
57 { CSW(ALIGNMENT_FAULTS), "alignment-faults", "" },
58 { CSW(EMULATION_FAULTS), "emulation-faults", "" },
59 };
60
61 #define __PERF_EVENT_FIELD(config, name) \
62 ((config & PERF_EVENT_##name##_MASK) >> PERF_EVENT_##name##_SHIFT)
63
64 #define PERF_EVENT_RAW(config) __PERF_EVENT_FIELD(config, RAW)
65 #define PERF_EVENT_CONFIG(config) __PERF_EVENT_FIELD(config, CONFIG)
66 #define PERF_EVENT_TYPE(config) __PERF_EVENT_FIELD(config, TYPE)
67 #define PERF_EVENT_ID(config) __PERF_EVENT_FIELD(config, EVENT)
68
69 static const char *hw_event_names[PERF_COUNT_HW_MAX] = {
70 "cycles",
71 "instructions",
72 "cache-references",
73 "cache-misses",
74 "branches",
75 "branch-misses",
76 "bus-cycles",
77 "stalled-cycles-frontend",
78 "stalled-cycles-backend",
79 };
80
81 static const char *sw_event_names[PERF_COUNT_SW_MAX] = {
82 "cpu-clock",
83 "task-clock",
84 "page-faults",
85 "context-switches",
86 "CPU-migrations",
87 "minor-faults",
88 "major-faults",
89 "alignment-faults",
90 "emulation-faults",
91 };
92
93 #define MAX_ALIASES 8
94
95 static const char *hw_cache[][MAX_ALIASES] = {
96 { "L1-dcache", "l1-d", "l1d", "L1-data", },
97 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
98 { "LLC", "L2" },
99 { "dTLB", "d-tlb", "Data-TLB", },
100 { "iTLB", "i-tlb", "Instruction-TLB", },
101 { "branch", "branches", "bpu", "btb", "bpc", },
102 };
103
104 static const char *hw_cache_op[][MAX_ALIASES] = {
105 { "load", "loads", "read", },
106 { "store", "stores", "write", },
107 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
108 };
109
110 static const char *hw_cache_result[][MAX_ALIASES] = {
111 { "refs", "Reference", "ops", "access", },
112 { "misses", "miss", },
113 };
114
115 #define C(x) PERF_COUNT_HW_CACHE_##x
116 #define CACHE_READ (1 << C(OP_READ))
117 #define CACHE_WRITE (1 << C(OP_WRITE))
118 #define CACHE_PREFETCH (1 << C(OP_PREFETCH))
119 #define COP(x) (1 << x)
120
121 /*
122 * cache operartion stat
123 * L1I : Read and prefetch only
124 * ITLB and BPU : Read-only
125 */
126 static unsigned long hw_cache_stat[C(MAX)] = {
127 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
128 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
129 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
130 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
131 [C(ITLB)] = (CACHE_READ),
132 [C(BPU)] = (CACHE_READ),
133 };
134
135 #define for_each_subsystem(sys_dir, sys_dirent, sys_next) \
136 while (!readdir_r(sys_dir, &sys_dirent, &sys_next) && sys_next) \
137 if (sys_dirent.d_type == DT_DIR && \
138 (strcmp(sys_dirent.d_name, ".")) && \
139 (strcmp(sys_dirent.d_name, "..")))
140
tp_event_has_id(struct dirent * sys_dir,struct dirent * evt_dir)141 static int tp_event_has_id(struct dirent *sys_dir, struct dirent *evt_dir)
142 {
143 char evt_path[MAXPATHLEN];
144 int fd;
145
146 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
147 sys_dir->d_name, evt_dir->d_name);
148 fd = open(evt_path, O_RDONLY);
149 if (fd < 0)
150 return -EINVAL;
151 close(fd);
152
153 return 0;
154 }
155
156 #define for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) \
157 while (!readdir_r(evt_dir, &evt_dirent, &evt_next) && evt_next) \
158 if (evt_dirent.d_type == DT_DIR && \
159 (strcmp(evt_dirent.d_name, ".")) && \
160 (strcmp(evt_dirent.d_name, "..")) && \
161 (!tp_event_has_id(&sys_dirent, &evt_dirent)))
162
163 #define MAX_EVENT_LENGTH 512
164
165
tracepoint_id_to_path(u64 config)166 struct tracepoint_path *tracepoint_id_to_path(u64 config)
167 {
168 struct tracepoint_path *path = NULL;
169 DIR *sys_dir, *evt_dir;
170 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
171 char id_buf[4];
172 int fd;
173 u64 id;
174 char evt_path[MAXPATHLEN];
175 char dir_path[MAXPATHLEN];
176
177 if (debugfs_valid_mountpoint(debugfs_path))
178 return NULL;
179
180 sys_dir = opendir(debugfs_path);
181 if (!sys_dir)
182 return NULL;
183
184 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
185
186 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
187 sys_dirent.d_name);
188 evt_dir = opendir(dir_path);
189 if (!evt_dir)
190 continue;
191
192 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
193
194 snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
195 evt_dirent.d_name);
196 fd = open(evt_path, O_RDONLY);
197 if (fd < 0)
198 continue;
199 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
200 close(fd);
201 continue;
202 }
203 close(fd);
204 id = atoll(id_buf);
205 if (id == config) {
206 closedir(evt_dir);
207 closedir(sys_dir);
208 path = zalloc(sizeof(*path));
209 path->system = malloc(MAX_EVENT_LENGTH);
210 if (!path->system) {
211 free(path);
212 return NULL;
213 }
214 path->name = malloc(MAX_EVENT_LENGTH);
215 if (!path->name) {
216 free(path->system);
217 free(path);
218 return NULL;
219 }
220 strncpy(path->system, sys_dirent.d_name,
221 MAX_EVENT_LENGTH);
222 strncpy(path->name, evt_dirent.d_name,
223 MAX_EVENT_LENGTH);
224 return path;
225 }
226 }
227 closedir(evt_dir);
228 }
229
230 closedir(sys_dir);
231 return NULL;
232 }
233
234 #define TP_PATH_LEN (MAX_EVENT_LENGTH * 2 + 1)
tracepoint_id_to_name(u64 config)235 static const char *tracepoint_id_to_name(u64 config)
236 {
237 static char buf[TP_PATH_LEN];
238 struct tracepoint_path *path;
239
240 path = tracepoint_id_to_path(config);
241 if (path) {
242 snprintf(buf, TP_PATH_LEN, "%s:%s", path->system, path->name);
243 free(path->name);
244 free(path->system);
245 free(path);
246 } else
247 snprintf(buf, TP_PATH_LEN, "%s:%s", "unknown", "unknown");
248
249 return buf;
250 }
251
is_cache_op_valid(u8 cache_type,u8 cache_op)252 static int is_cache_op_valid(u8 cache_type, u8 cache_op)
253 {
254 if (hw_cache_stat[cache_type] & COP(cache_op))
255 return 1; /* valid */
256 else
257 return 0; /* invalid */
258 }
259
event_cache_name(u8 cache_type,u8 cache_op,u8 cache_result)260 static char *event_cache_name(u8 cache_type, u8 cache_op, u8 cache_result)
261 {
262 static char name[50];
263
264 if (cache_result) {
265 sprintf(name, "%s-%s-%s", hw_cache[cache_type][0],
266 hw_cache_op[cache_op][0],
267 hw_cache_result[cache_result][0]);
268 } else {
269 sprintf(name, "%s-%s", hw_cache[cache_type][0],
270 hw_cache_op[cache_op][1]);
271 }
272
273 return name;
274 }
275
event_type(int type)276 const char *event_type(int type)
277 {
278 switch (type) {
279 case PERF_TYPE_HARDWARE:
280 return "hardware";
281
282 case PERF_TYPE_SOFTWARE:
283 return "software";
284
285 case PERF_TYPE_TRACEPOINT:
286 return "tracepoint";
287
288 case PERF_TYPE_HW_CACHE:
289 return "hardware-cache";
290
291 default:
292 break;
293 }
294
295 return "unknown";
296 }
297
event_name(struct perf_evsel * evsel)298 const char *event_name(struct perf_evsel *evsel)
299 {
300 u64 config = evsel->attr.config;
301 int type = evsel->attr.type;
302
303 if (evsel->name)
304 return evsel->name;
305
306 return __event_name(type, config);
307 }
308
__event_name(int type,u64 config)309 const char *__event_name(int type, u64 config)
310 {
311 static char buf[32];
312
313 if (type == PERF_TYPE_RAW) {
314 sprintf(buf, "raw 0x%" PRIx64, config);
315 return buf;
316 }
317
318 switch (type) {
319 case PERF_TYPE_HARDWARE:
320 if (config < PERF_COUNT_HW_MAX && hw_event_names[config])
321 return hw_event_names[config];
322 return "unknown-hardware";
323
324 case PERF_TYPE_HW_CACHE: {
325 u8 cache_type, cache_op, cache_result;
326
327 cache_type = (config >> 0) & 0xff;
328 if (cache_type > PERF_COUNT_HW_CACHE_MAX)
329 return "unknown-ext-hardware-cache-type";
330
331 cache_op = (config >> 8) & 0xff;
332 if (cache_op > PERF_COUNT_HW_CACHE_OP_MAX)
333 return "unknown-ext-hardware-cache-op";
334
335 cache_result = (config >> 16) & 0xff;
336 if (cache_result > PERF_COUNT_HW_CACHE_RESULT_MAX)
337 return "unknown-ext-hardware-cache-result";
338
339 if (!is_cache_op_valid(cache_type, cache_op))
340 return "invalid-cache";
341
342 return event_cache_name(cache_type, cache_op, cache_result);
343 }
344
345 case PERF_TYPE_SOFTWARE:
346 if (config < PERF_COUNT_SW_MAX && sw_event_names[config])
347 return sw_event_names[config];
348 return "unknown-software";
349
350 case PERF_TYPE_TRACEPOINT:
351 return tracepoint_id_to_name(config);
352
353 default:
354 break;
355 }
356
357 return "unknown";
358 }
359
parse_aliases(const char ** str,const char * names[][MAX_ALIASES],int size)360 static int parse_aliases(const char **str, const char *names[][MAX_ALIASES], int size)
361 {
362 int i, j;
363 int n, longest = -1;
364
365 for (i = 0; i < size; i++) {
366 for (j = 0; j < MAX_ALIASES && names[i][j]; j++) {
367 n = strlen(names[i][j]);
368 if (n > longest && !strncasecmp(*str, names[i][j], n))
369 longest = n;
370 }
371 if (longest > 0) {
372 *str += longest;
373 return i;
374 }
375 }
376
377 return -1;
378 }
379
380 static enum event_result
parse_generic_hw_event(const char ** str,struct perf_event_attr * attr)381 parse_generic_hw_event(const char **str, struct perf_event_attr *attr)
382 {
383 const char *s = *str;
384 int cache_type = -1, cache_op = -1, cache_result = -1;
385
386 cache_type = parse_aliases(&s, hw_cache, PERF_COUNT_HW_CACHE_MAX);
387 /*
388 * No fallback - if we cannot get a clear cache type
389 * then bail out:
390 */
391 if (cache_type == -1)
392 return EVT_FAILED;
393
394 while ((cache_op == -1 || cache_result == -1) && *s == '-') {
395 ++s;
396
397 if (cache_op == -1) {
398 cache_op = parse_aliases(&s, hw_cache_op,
399 PERF_COUNT_HW_CACHE_OP_MAX);
400 if (cache_op >= 0) {
401 if (!is_cache_op_valid(cache_type, cache_op))
402 return 0;
403 continue;
404 }
405 }
406
407 if (cache_result == -1) {
408 cache_result = parse_aliases(&s, hw_cache_result,
409 PERF_COUNT_HW_CACHE_RESULT_MAX);
410 if (cache_result >= 0)
411 continue;
412 }
413
414 /*
415 * Can't parse this as a cache op or result, so back up
416 * to the '-'.
417 */
418 --s;
419 break;
420 }
421
422 /*
423 * Fall back to reads:
424 */
425 if (cache_op == -1)
426 cache_op = PERF_COUNT_HW_CACHE_OP_READ;
427
428 /*
429 * Fall back to accesses:
430 */
431 if (cache_result == -1)
432 cache_result = PERF_COUNT_HW_CACHE_RESULT_ACCESS;
433
434 attr->config = cache_type | (cache_op << 8) | (cache_result << 16);
435 attr->type = PERF_TYPE_HW_CACHE;
436
437 *str = s;
438 return EVT_HANDLED;
439 }
440
441 static enum event_result
parse_single_tracepoint_event(char * sys_name,const char * evt_name,unsigned int evt_length,struct perf_event_attr * attr,const char ** strp)442 parse_single_tracepoint_event(char *sys_name,
443 const char *evt_name,
444 unsigned int evt_length,
445 struct perf_event_attr *attr,
446 const char **strp)
447 {
448 char evt_path[MAXPATHLEN];
449 char id_buf[4];
450 u64 id;
451 int fd;
452
453 snprintf(evt_path, MAXPATHLEN, "%s/%s/%s/id", debugfs_path,
454 sys_name, evt_name);
455
456 fd = open(evt_path, O_RDONLY);
457 if (fd < 0)
458 return EVT_FAILED;
459
460 if (read(fd, id_buf, sizeof(id_buf)) < 0) {
461 close(fd);
462 return EVT_FAILED;
463 }
464
465 close(fd);
466 id = atoll(id_buf);
467 attr->config = id;
468 attr->type = PERF_TYPE_TRACEPOINT;
469 *strp += strlen(sys_name) + evt_length + 1; /* + 1 for the ':' */
470
471 attr->sample_type |= PERF_SAMPLE_RAW;
472 attr->sample_type |= PERF_SAMPLE_TIME;
473 attr->sample_type |= PERF_SAMPLE_CPU;
474
475 attr->sample_period = 1;
476
477
478 return EVT_HANDLED;
479 }
480
481 /* sys + ':' + event + ':' + flags*/
482 #define MAX_EVOPT_LEN (MAX_EVENT_LENGTH * 2 + 2 + 128)
483 static enum event_result
parse_multiple_tracepoint_event(const struct option * opt,char * sys_name,const char * evt_exp,char * flags)484 parse_multiple_tracepoint_event(const struct option *opt, char *sys_name,
485 const char *evt_exp, char *flags)
486 {
487 char evt_path[MAXPATHLEN];
488 struct dirent *evt_ent;
489 DIR *evt_dir;
490
491 snprintf(evt_path, MAXPATHLEN, "%s/%s", debugfs_path, sys_name);
492 evt_dir = opendir(evt_path);
493
494 if (!evt_dir) {
495 perror("Can't open event dir");
496 return EVT_FAILED;
497 }
498
499 while ((evt_ent = readdir(evt_dir))) {
500 char event_opt[MAX_EVOPT_LEN + 1];
501 int len;
502
503 if (!strcmp(evt_ent->d_name, ".")
504 || !strcmp(evt_ent->d_name, "..")
505 || !strcmp(evt_ent->d_name, "enable")
506 || !strcmp(evt_ent->d_name, "filter"))
507 continue;
508
509 if (!strglobmatch(evt_ent->d_name, evt_exp))
510 continue;
511
512 len = snprintf(event_opt, MAX_EVOPT_LEN, "%s:%s%s%s", sys_name,
513 evt_ent->d_name, flags ? ":" : "",
514 flags ?: "");
515 if (len < 0)
516 return EVT_FAILED;
517
518 if (parse_events(opt, event_opt, 0))
519 return EVT_FAILED;
520 }
521
522 return EVT_HANDLED_ALL;
523 }
524
525 static enum event_result
parse_tracepoint_event(const struct option * opt,const char ** strp,struct perf_event_attr * attr)526 parse_tracepoint_event(const struct option *opt, const char **strp,
527 struct perf_event_attr *attr)
528 {
529 const char *evt_name;
530 char *flags = NULL, *comma_loc;
531 char sys_name[MAX_EVENT_LENGTH];
532 unsigned int sys_length, evt_length;
533
534 if (debugfs_valid_mountpoint(debugfs_path))
535 return 0;
536
537 evt_name = strchr(*strp, ':');
538 if (!evt_name)
539 return EVT_FAILED;
540
541 sys_length = evt_name - *strp;
542 if (sys_length >= MAX_EVENT_LENGTH)
543 return 0;
544
545 strncpy(sys_name, *strp, sys_length);
546 sys_name[sys_length] = '\0';
547 evt_name = evt_name + 1;
548
549 comma_loc = strchr(evt_name, ',');
550 if (comma_loc) {
551 /* take the event name up to the comma */
552 evt_name = strndup(evt_name, comma_loc - evt_name);
553 }
554 flags = strchr(evt_name, ':');
555 if (flags) {
556 /* split it out: */
557 evt_name = strndup(evt_name, flags - evt_name);
558 flags++;
559 }
560
561 evt_length = strlen(evt_name);
562 if (evt_length >= MAX_EVENT_LENGTH)
563 return EVT_FAILED;
564 if (strpbrk(evt_name, "*?")) {
565 *strp += strlen(sys_name) + evt_length + 1; /* 1 == the ':' */
566 return parse_multiple_tracepoint_event(opt, sys_name, evt_name,
567 flags);
568 } else {
569 return parse_single_tracepoint_event(sys_name, evt_name,
570 evt_length, attr, strp);
571 }
572 }
573
574 static enum event_result
parse_breakpoint_type(const char * type,const char ** strp,struct perf_event_attr * attr)575 parse_breakpoint_type(const char *type, const char **strp,
576 struct perf_event_attr *attr)
577 {
578 int i;
579
580 for (i = 0; i < 3; i++) {
581 if (!type[i])
582 break;
583
584 switch (type[i]) {
585 case 'r':
586 attr->bp_type |= HW_BREAKPOINT_R;
587 break;
588 case 'w':
589 attr->bp_type |= HW_BREAKPOINT_W;
590 break;
591 case 'x':
592 attr->bp_type |= HW_BREAKPOINT_X;
593 break;
594 default:
595 return EVT_FAILED;
596 }
597 }
598 if (!attr->bp_type) /* Default */
599 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
600
601 *strp = type + i;
602
603 return EVT_HANDLED;
604 }
605
606 static enum event_result
parse_breakpoint_event(const char ** strp,struct perf_event_attr * attr)607 parse_breakpoint_event(const char **strp, struct perf_event_attr *attr)
608 {
609 const char *target;
610 const char *type;
611 char *endaddr;
612 u64 addr;
613 enum event_result err;
614
615 target = strchr(*strp, ':');
616 if (!target)
617 return EVT_FAILED;
618
619 if (strncmp(*strp, "mem", target - *strp) != 0)
620 return EVT_FAILED;
621
622 target++;
623
624 addr = strtoull(target, &endaddr, 0);
625 if (target == endaddr)
626 return EVT_FAILED;
627
628 attr->bp_addr = addr;
629 *strp = endaddr;
630
631 type = strchr(target, ':');
632
633 /* If no type is defined, just rw as default */
634 if (!type) {
635 attr->bp_type = HW_BREAKPOINT_R | HW_BREAKPOINT_W;
636 } else {
637 err = parse_breakpoint_type(++type, strp, attr);
638 if (err == EVT_FAILED)
639 return EVT_FAILED;
640 }
641
642 /*
643 * We should find a nice way to override the access length
644 * Provide some defaults for now
645 */
646 if (attr->bp_type == HW_BREAKPOINT_X)
647 attr->bp_len = sizeof(long);
648 else
649 attr->bp_len = HW_BREAKPOINT_LEN_4;
650
651 attr->type = PERF_TYPE_BREAKPOINT;
652
653 return EVT_HANDLED;
654 }
655
check_events(const char * str,unsigned int i)656 static int check_events(const char *str, unsigned int i)
657 {
658 int n;
659
660 n = strlen(event_symbols[i].symbol);
661 if (!strncasecmp(str, event_symbols[i].symbol, n))
662 return n;
663
664 n = strlen(event_symbols[i].alias);
665 if (n) {
666 if (!strncasecmp(str, event_symbols[i].alias, n))
667 return n;
668 }
669
670 return 0;
671 }
672
673 static enum event_result
parse_symbolic_event(const char ** strp,struct perf_event_attr * attr)674 parse_symbolic_event(const char **strp, struct perf_event_attr *attr)
675 {
676 const char *str = *strp;
677 unsigned int i;
678 int n;
679
680 for (i = 0; i < ARRAY_SIZE(event_symbols); i++) {
681 n = check_events(str, i);
682 if (n > 0) {
683 attr->type = event_symbols[i].type;
684 attr->config = event_symbols[i].config;
685 *strp = str + n;
686 return EVT_HANDLED;
687 }
688 }
689 return EVT_FAILED;
690 }
691
692 static enum event_result
parse_raw_event(const char ** strp,struct perf_event_attr * attr)693 parse_raw_event(const char **strp, struct perf_event_attr *attr)
694 {
695 const char *str = *strp;
696 u64 config;
697 int n;
698
699 if (*str != 'r')
700 return EVT_FAILED;
701 n = hex2u64(str + 1, &config);
702 if (n > 0) {
703 *strp = str + n + 1;
704 attr->type = PERF_TYPE_RAW;
705 attr->config = config;
706 return EVT_HANDLED;
707 }
708 return EVT_FAILED;
709 }
710
711 static enum event_result
parse_numeric_event(const char ** strp,struct perf_event_attr * attr)712 parse_numeric_event(const char **strp, struct perf_event_attr *attr)
713 {
714 const char *str = *strp;
715 char *endp;
716 unsigned long type;
717 u64 config;
718
719 type = strtoul(str, &endp, 0);
720 if (endp > str && type < PERF_TYPE_MAX && *endp == ':') {
721 str = endp + 1;
722 config = strtoul(str, &endp, 0);
723 if (endp > str) {
724 attr->type = type;
725 attr->config = config;
726 *strp = endp;
727 return EVT_HANDLED;
728 }
729 }
730 return EVT_FAILED;
731 }
732
733 static int
parse_event_modifier(const char ** strp,struct perf_event_attr * attr)734 parse_event_modifier(const char **strp, struct perf_event_attr *attr)
735 {
736 const char *str = *strp;
737 int exclude = 0;
738 int eu = 0, ek = 0, eh = 0, precise = 0;
739
740 if (!*str)
741 return 0;
742
743 if (*str == ',')
744 return 0;
745
746 if (*str++ != ':')
747 return -1;
748
749 while (*str) {
750 if (*str == 'u') {
751 if (!exclude)
752 exclude = eu = ek = eh = 1;
753 eu = 0;
754 } else if (*str == 'k') {
755 if (!exclude)
756 exclude = eu = ek = eh = 1;
757 ek = 0;
758 } else if (*str == 'h') {
759 if (!exclude)
760 exclude = eu = ek = eh = 1;
761 eh = 0;
762 } else if (*str == 'p') {
763 precise++;
764 } else
765 break;
766
767 ++str;
768 }
769 if (str < *strp + 2)
770 return -1;
771
772 *strp = str;
773
774 attr->exclude_user = eu;
775 attr->exclude_kernel = ek;
776 attr->exclude_hv = eh;
777 attr->precise_ip = precise;
778
779 return 0;
780 }
781
782 /*
783 * Each event can have multiple symbolic names.
784 * Symbolic names are (almost) exactly matched.
785 */
786 static enum event_result
parse_event_symbols(const struct option * opt,const char ** str,struct perf_event_attr * attr)787 parse_event_symbols(const struct option *opt, const char **str,
788 struct perf_event_attr *attr)
789 {
790 enum event_result ret;
791
792 ret = parse_tracepoint_event(opt, str, attr);
793 if (ret != EVT_FAILED)
794 goto modifier;
795
796 ret = parse_raw_event(str, attr);
797 if (ret != EVT_FAILED)
798 goto modifier;
799
800 ret = parse_numeric_event(str, attr);
801 if (ret != EVT_FAILED)
802 goto modifier;
803
804 ret = parse_symbolic_event(str, attr);
805 if (ret != EVT_FAILED)
806 goto modifier;
807
808 ret = parse_generic_hw_event(str, attr);
809 if (ret != EVT_FAILED)
810 goto modifier;
811
812 ret = parse_breakpoint_event(str, attr);
813 if (ret != EVT_FAILED)
814 goto modifier;
815
816 fprintf(stderr, "invalid or unsupported event: '%s'\n", *str);
817 fprintf(stderr, "Run 'perf list' for a list of valid events\n");
818 return EVT_FAILED;
819
820 modifier:
821 if (parse_event_modifier(str, attr) < 0) {
822 fprintf(stderr, "invalid event modifier: '%s'\n", *str);
823 fprintf(stderr, "Run 'perf list' for a list of valid events and modifiers\n");
824
825 return EVT_FAILED;
826 }
827
828 return ret;
829 }
830
parse_events(const struct option * opt,const char * str,int unset __used)831 int parse_events(const struct option *opt, const char *str, int unset __used)
832 {
833 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
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(opt, &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
parse_filter(const struct option * opt,const char * str,int unset __used)872 int parse_filter(const struct option *opt, const char *str,
873 int unset __used)
874 {
875 struct perf_evlist *evlist = *(struct perf_evlist **)opt->value;
876 struct perf_evsel *last = NULL;
877
878 if (evlist->nr_entries > 0)
879 last = list_entry(evlist->entries.prev, struct perf_evsel, node);
880
881 if (last == NULL || last->attr.type != PERF_TYPE_TRACEPOINT) {
882 fprintf(stderr,
883 "-F option should follow a -e tracepoint option\n");
884 return -1;
885 }
886
887 last->filter = strdup(str);
888 if (last->filter == NULL) {
889 fprintf(stderr, "not enough memory to hold filter string\n");
890 return -1;
891 }
892
893 return 0;
894 }
895
896 static const char * const event_type_descriptors[] = {
897 "Hardware event",
898 "Software event",
899 "Tracepoint event",
900 "Hardware cache event",
901 "Raw hardware event descriptor",
902 "Hardware breakpoint",
903 };
904
905 /*
906 * Print the events from <debugfs_mount_point>/tracing/events
907 */
908
print_tracepoint_events(const char * subsys_glob,const char * event_glob)909 void print_tracepoint_events(const char *subsys_glob, const char *event_glob)
910 {
911 DIR *sys_dir, *evt_dir;
912 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
913 char evt_path[MAXPATHLEN];
914 char dir_path[MAXPATHLEN];
915
916 if (debugfs_valid_mountpoint(debugfs_path))
917 return;
918
919 sys_dir = opendir(debugfs_path);
920 if (!sys_dir)
921 return;
922
923 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
924 if (subsys_glob != NULL &&
925 !strglobmatch(sys_dirent.d_name, subsys_glob))
926 continue;
927
928 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
929 sys_dirent.d_name);
930 evt_dir = opendir(dir_path);
931 if (!evt_dir)
932 continue;
933
934 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
935 if (event_glob != NULL &&
936 !strglobmatch(evt_dirent.d_name, event_glob))
937 continue;
938
939 snprintf(evt_path, MAXPATHLEN, "%s:%s",
940 sys_dirent.d_name, evt_dirent.d_name);
941 printf(" %-50s [%s]\n", evt_path,
942 event_type_descriptors[PERF_TYPE_TRACEPOINT]);
943 }
944 closedir(evt_dir);
945 }
946 closedir(sys_dir);
947 }
948
949 /*
950 * Check whether event is in <debugfs_mount_point>/tracing/events
951 */
952
is_valid_tracepoint(const char * event_string)953 int is_valid_tracepoint(const char *event_string)
954 {
955 DIR *sys_dir, *evt_dir;
956 struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
957 char evt_path[MAXPATHLEN];
958 char dir_path[MAXPATHLEN];
959
960 if (debugfs_valid_mountpoint(debugfs_path))
961 return 0;
962
963 sys_dir = opendir(debugfs_path);
964 if (!sys_dir)
965 return 0;
966
967 for_each_subsystem(sys_dir, sys_dirent, sys_next) {
968
969 snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
970 sys_dirent.d_name);
971 evt_dir = opendir(dir_path);
972 if (!evt_dir)
973 continue;
974
975 for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
976 snprintf(evt_path, MAXPATHLEN, "%s:%s",
977 sys_dirent.d_name, evt_dirent.d_name);
978 if (!strcmp(evt_path, event_string)) {
979 closedir(evt_dir);
980 closedir(sys_dir);
981 return 1;
982 }
983 }
984 closedir(evt_dir);
985 }
986 closedir(sys_dir);
987 return 0;
988 }
989
print_events_type(u8 type)990 void print_events_type(u8 type)
991 {
992 struct event_symbol *syms = event_symbols;
993 unsigned int i;
994 char name[64];
995
996 for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
997 if (type != syms->type)
998 continue;
999
1000 if (strlen(syms->alias))
1001 snprintf(name, sizeof(name), "%s OR %s",
1002 syms->symbol, syms->alias);
1003 else
1004 snprintf(name, sizeof(name), "%s", syms->symbol);
1005
1006 printf(" %-50s [%s]\n", name,
1007 event_type_descriptors[type]);
1008 }
1009 }
1010
print_hwcache_events(const char * event_glob)1011 int print_hwcache_events(const char *event_glob)
1012 {
1013 unsigned int type, op, i, printed = 0;
1014
1015 for (type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) {
1016 for (op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) {
1017 /* skip invalid cache type */
1018 if (!is_cache_op_valid(type, op))
1019 continue;
1020
1021 for (i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) {
1022 char *name = event_cache_name(type, op, i);
1023
1024 if (event_glob != NULL && !strglobmatch(name, event_glob))
1025 continue;
1026
1027 printf(" %-50s [%s]\n", name,
1028 event_type_descriptors[PERF_TYPE_HW_CACHE]);
1029 ++printed;
1030 }
1031 }
1032 }
1033
1034 return printed;
1035 }
1036
1037 #define MAX_NAME_LEN 100
1038
1039 /*
1040 * Print the help text for the event symbols:
1041 */
print_events(const char * event_glob)1042 void print_events(const char *event_glob)
1043 {
1044 unsigned int i, type, prev_type = -1, printed = 0, ntypes_printed = 0;
1045 struct event_symbol *syms = event_symbols;
1046 char name[MAX_NAME_LEN];
1047
1048 printf("\n");
1049 printf("List of pre-defined events (to be used in -e):\n");
1050
1051 for (i = 0; i < ARRAY_SIZE(event_symbols); i++, syms++) {
1052 type = syms->type;
1053
1054 if (type != prev_type && printed) {
1055 printf("\n");
1056 printed = 0;
1057 ntypes_printed++;
1058 }
1059
1060 if (event_glob != NULL &&
1061 !(strglobmatch(syms->symbol, event_glob) ||
1062 (syms->alias && strglobmatch(syms->alias, event_glob))))
1063 continue;
1064
1065 if (strlen(syms->alias))
1066 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms->symbol, syms->alias);
1067 else
1068 strncpy(name, syms->symbol, MAX_NAME_LEN);
1069 printf(" %-50s [%s]\n", name,
1070 event_type_descriptors[type]);
1071
1072 prev_type = type;
1073 ++printed;
1074 }
1075
1076 if (ntypes_printed) {
1077 printed = 0;
1078 printf("\n");
1079 }
1080 print_hwcache_events(event_glob);
1081
1082 if (event_glob != NULL)
1083 return;
1084
1085 printf("\n");
1086 printf(" %-50s [%s]\n",
1087 "rNNN (see 'perf list --help' on how to encode it)",
1088 event_type_descriptors[PERF_TYPE_RAW]);
1089 printf("\n");
1090
1091 printf(" %-50s [%s]\n",
1092 "mem:<addr>[:access]",
1093 event_type_descriptors[PERF_TYPE_BREAKPOINT]);
1094 printf("\n");
1095
1096 print_tracepoint_events(NULL, NULL);
1097
1098 exit(129);
1099 }
1100