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1 | // SPDX-License-Identifier: GPL-2.0 | |
2 | /* | |
3 | * builtin-record.c | |
4 | * | |
5 | * Builtin record command: Record the profile of a workload | |
6 | * (or a CPU, or a PID) into the perf.data output file - for | |
7 | * later analysis via perf report. | |
8 | */ | |
9 | #include "builtin.h" | |
10 | ||
11 | #include "util/build-id.h" | |
12 | #include <subcmd/parse-options.h> | |
13 | #include "util/parse-events.h" | |
14 | #include "util/config.h" | |
15 | ||
16 | #include "util/callchain.h" | |
17 | #include "util/cgroup.h" | |
18 | #include "util/header.h" | |
19 | #include "util/event.h" | |
20 | #include "util/evlist.h" | |
21 | #include "util/evsel.h" | |
22 | #include "util/debug.h" | |
23 | #include "util/mmap.h" | |
24 | #include "util/target.h" | |
25 | #include "util/session.h" | |
26 | #include "util/tool.h" | |
27 | #include "util/symbol.h" | |
28 | #include "util/record.h" | |
29 | #include "util/cpumap.h" | |
30 | #include "util/thread_map.h" | |
31 | #include "util/data.h" | |
32 | #include "util/perf_regs.h" | |
33 | #include "util/auxtrace.h" | |
34 | #include "util/tsc.h" | |
35 | #include "util/parse-branch-options.h" | |
36 | #include "util/parse-regs-options.h" | |
37 | #include "util/perf_api_probe.h" | |
38 | #include "util/llvm-utils.h" | |
39 | #include "util/bpf-loader.h" | |
40 | #include "util/trigger.h" | |
41 | #include "util/perf-hooks.h" | |
42 | #include "util/cpu-set-sched.h" | |
43 | #include "util/synthetic-events.h" | |
44 | #include "util/time-utils.h" | |
45 | #include "util/units.h" | |
46 | #include "util/bpf-event.h" | |
47 | #include "util/util.h" | |
48 | #include "util/pfm.h" | |
49 | #include "util/clockid.h" | |
50 | #include "asm/bug.h" | |
51 | #include "perf.h" | |
52 | ||
53 | #include <errno.h> | |
54 | #include <inttypes.h> | |
55 | #include <locale.h> | |
56 | #include <poll.h> | |
57 | #include <pthread.h> | |
58 | #include <unistd.h> | |
59 | #include <sched.h> | |
60 | #include <signal.h> | |
61 | #ifdef HAVE_EVENTFD_SUPPORT | |
62 | #include <sys/eventfd.h> | |
63 | #endif | |
64 | #include <sys/mman.h> | |
65 | #include <sys/wait.h> | |
66 | #include <sys/types.h> | |
67 | #include <sys/stat.h> | |
68 | #include <fcntl.h> | |
69 | #include <linux/err.h> | |
70 | #include <linux/string.h> | |
71 | #include <linux/time64.h> | |
72 | #include <linux/zalloc.h> | |
73 | #include <linux/bitmap.h> | |
74 | #include <sys/time.h> | |
75 | ||
76 | struct switch_output { | |
77 | bool enabled; | |
78 | bool signal; | |
79 | unsigned long size; | |
80 | unsigned long time; | |
81 | const char *str; | |
82 | bool set; | |
83 | char **filenames; | |
84 | int num_files; | |
85 | int cur_file; | |
86 | }; | |
87 | ||
88 | struct record { | |
89 | struct perf_tool tool; | |
90 | struct record_opts opts; | |
91 | u64 bytes_written; | |
92 | struct perf_data data; | |
93 | struct auxtrace_record *itr; | |
94 | struct evlist *evlist; | |
95 | struct perf_session *session; | |
96 | struct evlist *sb_evlist; | |
97 | pthread_t thread_id; | |
98 | int realtime_prio; | |
99 | bool switch_output_event_set; | |
100 | bool no_buildid; | |
101 | bool no_buildid_set; | |
102 | bool no_buildid_cache; | |
103 | bool no_buildid_cache_set; | |
104 | bool buildid_all; | |
105 | bool timestamp_filename; | |
106 | bool timestamp_boundary; | |
107 | struct switch_output switch_output; | |
108 | unsigned long long samples; | |
109 | struct mmap_cpu_mask affinity_mask; | |
110 | unsigned long output_max_size; /* = 0: unlimited */ | |
111 | }; | |
112 | ||
113 | static volatile int done; | |
114 | ||
115 | static volatile int auxtrace_record__snapshot_started; | |
116 | static DEFINE_TRIGGER(auxtrace_snapshot_trigger); | |
117 | static DEFINE_TRIGGER(switch_output_trigger); | |
118 | ||
119 | static const char *affinity_tags[PERF_AFFINITY_MAX] = { | |
120 | "SYS", "NODE", "CPU" | |
121 | }; | |
122 | ||
123 | static bool switch_output_signal(struct record *rec) | |
124 | { | |
125 | return rec->switch_output.signal && | |
126 | trigger_is_ready(&switch_output_trigger); | |
127 | } | |
128 | ||
129 | static bool switch_output_size(struct record *rec) | |
130 | { | |
131 | return rec->switch_output.size && | |
132 | trigger_is_ready(&switch_output_trigger) && | |
133 | (rec->bytes_written >= rec->switch_output.size); | |
134 | } | |
135 | ||
136 | static bool switch_output_time(struct record *rec) | |
137 | { | |
138 | return rec->switch_output.time && | |
139 | trigger_is_ready(&switch_output_trigger); | |
140 | } | |
141 | ||
142 | static bool record__output_max_size_exceeded(struct record *rec) | |
143 | { | |
144 | return rec->output_max_size && | |
145 | (rec->bytes_written >= rec->output_max_size); | |
146 | } | |
147 | ||
148 | static int record__write(struct record *rec, struct mmap *map __maybe_unused, | |
149 | void *bf, size_t size) | |
150 | { | |
151 | struct perf_data_file *file = &rec->session->data->file; | |
152 | ||
153 | if (perf_data_file__write(file, bf, size) < 0) { | |
154 | pr_err("failed to write perf data, error: %m\n"); | |
155 | return -1; | |
156 | } | |
157 | ||
158 | rec->bytes_written += size; | |
159 | ||
160 | if (record__output_max_size_exceeded(rec) && !done) { | |
161 | fprintf(stderr, "[ perf record: perf size limit reached (%" PRIu64 " KB)," | |
162 | " stopping session ]\n", | |
163 | rec->bytes_written >> 10); | |
164 | done = 1; | |
165 | } | |
166 | ||
167 | if (switch_output_size(rec)) | |
168 | trigger_hit(&switch_output_trigger); | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static int record__aio_enabled(struct record *rec); | |
174 | static int record__comp_enabled(struct record *rec); | |
175 | static size_t zstd_compress(struct perf_session *session, void *dst, size_t dst_size, | |
176 | void *src, size_t src_size); | |
177 | ||
178 | #ifdef HAVE_AIO_SUPPORT | |
179 | static int record__aio_write(struct aiocb *cblock, int trace_fd, | |
180 | void *buf, size_t size, off_t off) | |
181 | { | |
182 | int rc; | |
183 | ||
184 | cblock->aio_fildes = trace_fd; | |
185 | cblock->aio_buf = buf; | |
186 | cblock->aio_nbytes = size; | |
187 | cblock->aio_offset = off; | |
188 | cblock->aio_sigevent.sigev_notify = SIGEV_NONE; | |
189 | ||
190 | do { | |
191 | rc = aio_write(cblock); | |
192 | if (rc == 0) { | |
193 | break; | |
194 | } else if (errno != EAGAIN) { | |
195 | cblock->aio_fildes = -1; | |
196 | pr_err("failed to queue perf data, error: %m\n"); | |
197 | break; | |
198 | } | |
199 | } while (1); | |
200 | ||
201 | return rc; | |
202 | } | |
203 | ||
204 | static int record__aio_complete(struct mmap *md, struct aiocb *cblock) | |
205 | { | |
206 | void *rem_buf; | |
207 | off_t rem_off; | |
208 | size_t rem_size; | |
209 | int rc, aio_errno; | |
210 | ssize_t aio_ret, written; | |
211 | ||
212 | aio_errno = aio_error(cblock); | |
213 | if (aio_errno == EINPROGRESS) | |
214 | return 0; | |
215 | ||
216 | written = aio_ret = aio_return(cblock); | |
217 | if (aio_ret < 0) { | |
218 | if (aio_errno != EINTR) | |
219 | pr_err("failed to write perf data, error: %m\n"); | |
220 | written = 0; | |
221 | } | |
222 | ||
223 | rem_size = cblock->aio_nbytes - written; | |
224 | ||
225 | if (rem_size == 0) { | |
226 | cblock->aio_fildes = -1; | |
227 | /* | |
228 | * md->refcount is incremented in record__aio_pushfn() for | |
229 | * every aio write request started in record__aio_push() so | |
230 | * decrement it because the request is now complete. | |
231 | */ | |
232 | perf_mmap__put(&md->core); | |
233 | rc = 1; | |
234 | } else { | |
235 | /* | |
236 | * aio write request may require restart with the | |
237 | * reminder if the kernel didn't write whole | |
238 | * chunk at once. | |
239 | */ | |
240 | rem_off = cblock->aio_offset + written; | |
241 | rem_buf = (void *)(cblock->aio_buf + written); | |
242 | record__aio_write(cblock, cblock->aio_fildes, | |
243 | rem_buf, rem_size, rem_off); | |
244 | rc = 0; | |
245 | } | |
246 | ||
247 | return rc; | |
248 | } | |
249 | ||
250 | static int record__aio_sync(struct mmap *md, bool sync_all) | |
251 | { | |
252 | struct aiocb **aiocb = md->aio.aiocb; | |
253 | struct aiocb *cblocks = md->aio.cblocks; | |
254 | struct timespec timeout = { 0, 1000 * 1000 * 1 }; /* 1ms */ | |
255 | int i, do_suspend; | |
256 | ||
257 | do { | |
258 | do_suspend = 0; | |
259 | for (i = 0; i < md->aio.nr_cblocks; ++i) { | |
260 | if (cblocks[i].aio_fildes == -1 || record__aio_complete(md, &cblocks[i])) { | |
261 | if (sync_all) | |
262 | aiocb[i] = NULL; | |
263 | else | |
264 | return i; | |
265 | } else { | |
266 | /* | |
267 | * Started aio write is not complete yet | |
268 | * so it has to be waited before the | |
269 | * next allocation. | |
270 | */ | |
271 | aiocb[i] = &cblocks[i]; | |
272 | do_suspend = 1; | |
273 | } | |
274 | } | |
275 | if (!do_suspend) | |
276 | return -1; | |
277 | ||
278 | while (aio_suspend((const struct aiocb **)aiocb, md->aio.nr_cblocks, &timeout)) { | |
279 | if (!(errno == EAGAIN || errno == EINTR)) | |
280 | pr_err("failed to sync perf data, error: %m\n"); | |
281 | } | |
282 | } while (1); | |
283 | } | |
284 | ||
285 | struct record_aio { | |
286 | struct record *rec; | |
287 | void *data; | |
288 | size_t size; | |
289 | }; | |
290 | ||
291 | static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size) | |
292 | { | |
293 | struct record_aio *aio = to; | |
294 | ||
295 | /* | |
296 | * map->core.base data pointed by buf is copied into free map->aio.data[] buffer | |
297 | * to release space in the kernel buffer as fast as possible, calling | |
298 | * perf_mmap__consume() from perf_mmap__push() function. | |
299 | * | |
300 | * That lets the kernel to proceed with storing more profiling data into | |
301 | * the kernel buffer earlier than other per-cpu kernel buffers are handled. | |
302 | * | |
303 | * Coping can be done in two steps in case the chunk of profiling data | |
304 | * crosses the upper bound of the kernel buffer. In this case we first move | |
305 | * part of data from map->start till the upper bound and then the reminder | |
306 | * from the beginning of the kernel buffer till the end of the data chunk. | |
307 | */ | |
308 | ||
309 | if (record__comp_enabled(aio->rec)) { | |
310 | size = zstd_compress(aio->rec->session, aio->data + aio->size, | |
311 | mmap__mmap_len(map) - aio->size, | |
312 | buf, size); | |
313 | } else { | |
314 | memcpy(aio->data + aio->size, buf, size); | |
315 | } | |
316 | ||
317 | if (!aio->size) { | |
318 | /* | |
319 | * Increment map->refcount to guard map->aio.data[] buffer | |
320 | * from premature deallocation because map object can be | |
321 | * released earlier than aio write request started on | |
322 | * map->aio.data[] buffer is complete. | |
323 | * | |
324 | * perf_mmap__put() is done at record__aio_complete() | |
325 | * after started aio request completion or at record__aio_push() | |
326 | * if the request failed to start. | |
327 | */ | |
328 | perf_mmap__get(&map->core); | |
329 | } | |
330 | ||
331 | aio->size += size; | |
332 | ||
333 | return size; | |
334 | } | |
335 | ||
336 | static int record__aio_push(struct record *rec, struct mmap *map, off_t *off) | |
337 | { | |
338 | int ret, idx; | |
339 | int trace_fd = rec->session->data->file.fd; | |
340 | struct record_aio aio = { .rec = rec, .size = 0 }; | |
341 | ||
342 | /* | |
343 | * Call record__aio_sync() to wait till map->aio.data[] buffer | |
344 | * becomes available after previous aio write operation. | |
345 | */ | |
346 | ||
347 | idx = record__aio_sync(map, false); | |
348 | aio.data = map->aio.data[idx]; | |
349 | ret = perf_mmap__push(map, &aio, record__aio_pushfn); | |
350 | if (ret != 0) /* ret > 0 - no data, ret < 0 - error */ | |
351 | return ret; | |
352 | ||
353 | rec->samples++; | |
354 | ret = record__aio_write(&(map->aio.cblocks[idx]), trace_fd, aio.data, aio.size, *off); | |
355 | if (!ret) { | |
356 | *off += aio.size; | |
357 | rec->bytes_written += aio.size; | |
358 | if (switch_output_size(rec)) | |
359 | trigger_hit(&switch_output_trigger); | |
360 | } else { | |
361 | /* | |
362 | * Decrement map->refcount incremented in record__aio_pushfn() | |
363 | * back if record__aio_write() operation failed to start, otherwise | |
364 | * map->refcount is decremented in record__aio_complete() after | |
365 | * aio write operation finishes successfully. | |
366 | */ | |
367 | perf_mmap__put(&map->core); | |
368 | } | |
369 | ||
370 | return ret; | |
371 | } | |
372 | ||
373 | static off_t record__aio_get_pos(int trace_fd) | |
374 | { | |
375 | return lseek(trace_fd, 0, SEEK_CUR); | |
376 | } | |
377 | ||
378 | static void record__aio_set_pos(int trace_fd, off_t pos) | |
379 | { | |
380 | lseek(trace_fd, pos, SEEK_SET); | |
381 | } | |
382 | ||
383 | static void record__aio_mmap_read_sync(struct record *rec) | |
384 | { | |
385 | int i; | |
386 | struct evlist *evlist = rec->evlist; | |
387 | struct mmap *maps = evlist->mmap; | |
388 | ||
389 | if (!record__aio_enabled(rec)) | |
390 | return; | |
391 | ||
392 | for (i = 0; i < evlist->core.nr_mmaps; i++) { | |
393 | struct mmap *map = &maps[i]; | |
394 | ||
395 | if (map->core.base) | |
396 | record__aio_sync(map, true); | |
397 | } | |
398 | } | |
399 | ||
400 | static int nr_cblocks_default = 1; | |
401 | static int nr_cblocks_max = 4; | |
402 | ||
403 | static int record__aio_parse(const struct option *opt, | |
404 | const char *str, | |
405 | int unset) | |
406 | { | |
407 | struct record_opts *opts = (struct record_opts *)opt->value; | |
408 | ||
409 | if (unset) { | |
410 | opts->nr_cblocks = 0; | |
411 | } else { | |
412 | if (str) | |
413 | opts->nr_cblocks = strtol(str, NULL, 0); | |
414 | if (!opts->nr_cblocks) | |
415 | opts->nr_cblocks = nr_cblocks_default; | |
416 | } | |
417 | ||
418 | return 0; | |
419 | } | |
420 | #else /* HAVE_AIO_SUPPORT */ | |
421 | static int nr_cblocks_max = 0; | |
422 | ||
423 | static int record__aio_push(struct record *rec __maybe_unused, struct mmap *map __maybe_unused, | |
424 | off_t *off __maybe_unused) | |
425 | { | |
426 | return -1; | |
427 | } | |
428 | ||
429 | static off_t record__aio_get_pos(int trace_fd __maybe_unused) | |
430 | { | |
431 | return -1; | |
432 | } | |
433 | ||
434 | static void record__aio_set_pos(int trace_fd __maybe_unused, off_t pos __maybe_unused) | |
435 | { | |
436 | } | |
437 | ||
438 | static void record__aio_mmap_read_sync(struct record *rec __maybe_unused) | |
439 | { | |
440 | } | |
441 | #endif | |
442 | ||
443 | static int record__aio_enabled(struct record *rec) | |
444 | { | |
445 | return rec->opts.nr_cblocks > 0; | |
446 | } | |
447 | ||
448 | #define MMAP_FLUSH_DEFAULT 1 | |
449 | static int record__mmap_flush_parse(const struct option *opt, | |
450 | const char *str, | |
451 | int unset) | |
452 | { | |
453 | int flush_max; | |
454 | struct record_opts *opts = (struct record_opts *)opt->value; | |
455 | static struct parse_tag tags[] = { | |
456 | { .tag = 'B', .mult = 1 }, | |
457 | { .tag = 'K', .mult = 1 << 10 }, | |
458 | { .tag = 'M', .mult = 1 << 20 }, | |
459 | { .tag = 'G', .mult = 1 << 30 }, | |
460 | { .tag = 0 }, | |
461 | }; | |
462 | ||
463 | if (unset) | |
464 | return 0; | |
465 | ||
466 | if (str) { | |
467 | opts->mmap_flush = parse_tag_value(str, tags); | |
468 | if (opts->mmap_flush == (int)-1) | |
469 | opts->mmap_flush = strtol(str, NULL, 0); | |
470 | } | |
471 | ||
472 | if (!opts->mmap_flush) | |
473 | opts->mmap_flush = MMAP_FLUSH_DEFAULT; | |
474 | ||
475 | flush_max = evlist__mmap_size(opts->mmap_pages); | |
476 | flush_max /= 4; | |
477 | if (opts->mmap_flush > flush_max) | |
478 | opts->mmap_flush = flush_max; | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
483 | #ifdef HAVE_ZSTD_SUPPORT | |
484 | static unsigned int comp_level_default = 1; | |
485 | ||
486 | static int record__parse_comp_level(const struct option *opt, const char *str, int unset) | |
487 | { | |
488 | struct record_opts *opts = opt->value; | |
489 | ||
490 | if (unset) { | |
491 | opts->comp_level = 0; | |
492 | } else { | |
493 | if (str) | |
494 | opts->comp_level = strtol(str, NULL, 0); | |
495 | if (!opts->comp_level) | |
496 | opts->comp_level = comp_level_default; | |
497 | } | |
498 | ||
499 | return 0; | |
500 | } | |
501 | #endif | |
502 | static unsigned int comp_level_max = 22; | |
503 | ||
504 | static int record__comp_enabled(struct record *rec) | |
505 | { | |
506 | return rec->opts.comp_level > 0; | |
507 | } | |
508 | ||
509 | static int process_synthesized_event(struct perf_tool *tool, | |
510 | union perf_event *event, | |
511 | struct perf_sample *sample __maybe_unused, | |
512 | struct machine *machine __maybe_unused) | |
513 | { | |
514 | struct record *rec = container_of(tool, struct record, tool); | |
515 | return record__write(rec, NULL, event, event->header.size); | |
516 | } | |
517 | ||
518 | static int process_locked_synthesized_event(struct perf_tool *tool, | |
519 | union perf_event *event, | |
520 | struct perf_sample *sample __maybe_unused, | |
521 | struct machine *machine __maybe_unused) | |
522 | { | |
523 | static pthread_mutex_t synth_lock = PTHREAD_MUTEX_INITIALIZER; | |
524 | int ret; | |
525 | ||
526 | pthread_mutex_lock(&synth_lock); | |
527 | ret = process_synthesized_event(tool, event, sample, machine); | |
528 | pthread_mutex_unlock(&synth_lock); | |
529 | return ret; | |
530 | } | |
531 | ||
532 | static int record__pushfn(struct mmap *map, void *to, void *bf, size_t size) | |
533 | { | |
534 | struct record *rec = to; | |
535 | ||
536 | if (record__comp_enabled(rec)) { | |
537 | size = zstd_compress(rec->session, map->data, mmap__mmap_len(map), bf, size); | |
538 | bf = map->data; | |
539 | } | |
540 | ||
541 | rec->samples++; | |
542 | return record__write(rec, map, bf, size); | |
543 | } | |
544 | ||
545 | static volatile int signr = -1; | |
546 | static volatile int child_finished; | |
547 | #ifdef HAVE_EVENTFD_SUPPORT | |
548 | static int done_fd = -1; | |
549 | #endif | |
550 | ||
551 | static void sig_handler(int sig) | |
552 | { | |
553 | if (sig == SIGCHLD) | |
554 | child_finished = 1; | |
555 | else | |
556 | signr = sig; | |
557 | ||
558 | done = 1; | |
559 | #ifdef HAVE_EVENTFD_SUPPORT | |
560 | { | |
561 | u64 tmp = 1; | |
562 | /* | |
563 | * It is possible for this signal handler to run after done is checked | |
564 | * in the main loop, but before the perf counter fds are polled. If this | |
565 | * happens, the poll() will continue to wait even though done is set, | |
566 | * and will only break out if either another signal is received, or the | |
567 | * counters are ready for read. To ensure the poll() doesn't sleep when | |
568 | * done is set, use an eventfd (done_fd) to wake up the poll(). | |
569 | */ | |
570 | if (write(done_fd, &tmp, sizeof(tmp)) < 0) | |
571 | pr_err("failed to signal wakeup fd, error: %m\n"); | |
572 | } | |
573 | #endif // HAVE_EVENTFD_SUPPORT | |
574 | } | |
575 | ||
576 | static void sigsegv_handler(int sig) | |
577 | { | |
578 | perf_hooks__recover(); | |
579 | sighandler_dump_stack(sig); | |
580 | } | |
581 | ||
582 | static void record__sig_exit(void) | |
583 | { | |
584 | if (signr == -1) | |
585 | return; | |
586 | ||
587 | signal(signr, SIG_DFL); | |
588 | raise(signr); | |
589 | } | |
590 | ||
591 | #ifdef HAVE_AUXTRACE_SUPPORT | |
592 | ||
593 | static int record__process_auxtrace(struct perf_tool *tool, | |
594 | struct mmap *map, | |
595 | union perf_event *event, void *data1, | |
596 | size_t len1, void *data2, size_t len2) | |
597 | { | |
598 | struct record *rec = container_of(tool, struct record, tool); | |
599 | struct perf_data *data = &rec->data; | |
600 | size_t padding; | |
601 | u8 pad[8] = {0}; | |
602 | ||
603 | if (!perf_data__is_pipe(data) && perf_data__is_single_file(data)) { | |
604 | off_t file_offset; | |
605 | int fd = perf_data__fd(data); | |
606 | int err; | |
607 | ||
608 | file_offset = lseek(fd, 0, SEEK_CUR); | |
609 | if (file_offset == -1) | |
610 | return -1; | |
611 | err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index, | |
612 | event, file_offset); | |
613 | if (err) | |
614 | return err; | |
615 | } | |
616 | ||
617 | /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */ | |
618 | padding = (len1 + len2) & 7; | |
619 | if (padding) | |
620 | padding = 8 - padding; | |
621 | ||
622 | record__write(rec, map, event, event->header.size); | |
623 | record__write(rec, map, data1, len1); | |
624 | if (len2) | |
625 | record__write(rec, map, data2, len2); | |
626 | record__write(rec, map, &pad, padding); | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
631 | static int record__auxtrace_mmap_read(struct record *rec, | |
632 | struct mmap *map) | |
633 | { | |
634 | int ret; | |
635 | ||
636 | ret = auxtrace_mmap__read(map, rec->itr, &rec->tool, | |
637 | record__process_auxtrace); | |
638 | if (ret < 0) | |
639 | return ret; | |
640 | ||
641 | if (ret) | |
642 | rec->samples++; | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
647 | static int record__auxtrace_mmap_read_snapshot(struct record *rec, | |
648 | struct mmap *map) | |
649 | { | |
650 | int ret; | |
651 | ||
652 | ret = auxtrace_mmap__read_snapshot(map, rec->itr, &rec->tool, | |
653 | record__process_auxtrace, | |
654 | rec->opts.auxtrace_snapshot_size); | |
655 | if (ret < 0) | |
656 | return ret; | |
657 | ||
658 | if (ret) | |
659 | rec->samples++; | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | static int record__auxtrace_read_snapshot_all(struct record *rec) | |
665 | { | |
666 | int i; | |
667 | int rc = 0; | |
668 | ||
669 | for (i = 0; i < rec->evlist->core.nr_mmaps; i++) { | |
670 | struct mmap *map = &rec->evlist->mmap[i]; | |
671 | ||
672 | if (!map->auxtrace_mmap.base) | |
673 | continue; | |
674 | ||
675 | if (record__auxtrace_mmap_read_snapshot(rec, map) != 0) { | |
676 | rc = -1; | |
677 | goto out; | |
678 | } | |
679 | } | |
680 | out: | |
681 | return rc; | |
682 | } | |
683 | ||
684 | static void record__read_auxtrace_snapshot(struct record *rec, bool on_exit) | |
685 | { | |
686 | pr_debug("Recording AUX area tracing snapshot\n"); | |
687 | if (record__auxtrace_read_snapshot_all(rec) < 0) { | |
688 | trigger_error(&auxtrace_snapshot_trigger); | |
689 | } else { | |
690 | if (auxtrace_record__snapshot_finish(rec->itr, on_exit)) | |
691 | trigger_error(&auxtrace_snapshot_trigger); | |
692 | else | |
693 | trigger_ready(&auxtrace_snapshot_trigger); | |
694 | } | |
695 | } | |
696 | ||
697 | static int record__auxtrace_snapshot_exit(struct record *rec) | |
698 | { | |
699 | if (trigger_is_error(&auxtrace_snapshot_trigger)) | |
700 | return 0; | |
701 | ||
702 | if (!auxtrace_record__snapshot_started && | |
703 | auxtrace_record__snapshot_start(rec->itr)) | |
704 | return -1; | |
705 | ||
706 | record__read_auxtrace_snapshot(rec, true); | |
707 | if (trigger_is_error(&auxtrace_snapshot_trigger)) | |
708 | return -1; | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
713 | static int record__auxtrace_init(struct record *rec) | |
714 | { | |
715 | int err; | |
716 | ||
717 | if (!rec->itr) { | |
718 | rec->itr = auxtrace_record__init(rec->evlist, &err); | |
719 | if (err) | |
720 | return err; | |
721 | } | |
722 | ||
723 | err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts, | |
724 | rec->opts.auxtrace_snapshot_opts); | |
725 | if (err) | |
726 | return err; | |
727 | ||
728 | err = auxtrace_parse_sample_options(rec->itr, rec->evlist, &rec->opts, | |
729 | rec->opts.auxtrace_sample_opts); | |
730 | if (err) | |
731 | return err; | |
732 | ||
733 | return auxtrace_parse_filters(rec->evlist); | |
734 | } | |
735 | ||
736 | #else | |
737 | ||
738 | static inline | |
739 | int record__auxtrace_mmap_read(struct record *rec __maybe_unused, | |
740 | struct mmap *map __maybe_unused) | |
741 | { | |
742 | return 0; | |
743 | } | |
744 | ||
745 | static inline | |
746 | void record__read_auxtrace_snapshot(struct record *rec __maybe_unused, | |
747 | bool on_exit __maybe_unused) | |
748 | { | |
749 | } | |
750 | ||
751 | static inline | |
752 | int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused) | |
753 | { | |
754 | return 0; | |
755 | } | |
756 | ||
757 | static inline | |
758 | int record__auxtrace_snapshot_exit(struct record *rec __maybe_unused) | |
759 | { | |
760 | return 0; | |
761 | } | |
762 | ||
763 | static int record__auxtrace_init(struct record *rec __maybe_unused) | |
764 | { | |
765 | return 0; | |
766 | } | |
767 | ||
768 | #endif | |
769 | ||
770 | static int record__config_text_poke(struct evlist *evlist) | |
771 | { | |
772 | struct evsel *evsel; | |
773 | int err; | |
774 | ||
775 | /* Nothing to do if text poke is already configured */ | |
776 | evlist__for_each_entry(evlist, evsel) { | |
777 | if (evsel->core.attr.text_poke) | |
778 | return 0; | |
779 | } | |
780 | ||
781 | err = parse_events(evlist, "dummy:u", NULL); | |
782 | if (err) | |
783 | return err; | |
784 | ||
785 | evsel = evlist__last(evlist); | |
786 | ||
787 | evsel->core.attr.freq = 0; | |
788 | evsel->core.attr.sample_period = 1; | |
789 | evsel->core.attr.text_poke = 1; | |
790 | evsel->core.attr.ksymbol = 1; | |
791 | ||
792 | evsel->core.system_wide = true; | |
793 | evsel->no_aux_samples = true; | |
794 | evsel->immediate = true; | |
795 | ||
796 | /* Text poke must be collected on all CPUs */ | |
797 | perf_cpu_map__put(evsel->core.own_cpus); | |
798 | evsel->core.own_cpus = perf_cpu_map__new(NULL); | |
799 | perf_cpu_map__put(evsel->core.cpus); | |
800 | evsel->core.cpus = perf_cpu_map__get(evsel->core.own_cpus); | |
801 | ||
802 | evsel__set_sample_bit(evsel, TIME); | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | static bool record__kcore_readable(struct machine *machine) | |
808 | { | |
809 | char kcore[PATH_MAX]; | |
810 | int fd; | |
811 | ||
812 | scnprintf(kcore, sizeof(kcore), "%s/proc/kcore", machine->root_dir); | |
813 | ||
814 | fd = open(kcore, O_RDONLY); | |
815 | if (fd < 0) | |
816 | return false; | |
817 | ||
818 | close(fd); | |
819 | ||
820 | return true; | |
821 | } | |
822 | ||
823 | static int record__kcore_copy(struct machine *machine, struct perf_data *data) | |
824 | { | |
825 | char from_dir[PATH_MAX]; | |
826 | char kcore_dir[PATH_MAX]; | |
827 | int ret; | |
828 | ||
829 | snprintf(from_dir, sizeof(from_dir), "%s/proc", machine->root_dir); | |
830 | ||
831 | ret = perf_data__make_kcore_dir(data, kcore_dir, sizeof(kcore_dir)); | |
832 | if (ret) | |
833 | return ret; | |
834 | ||
835 | return kcore_copy(from_dir, kcore_dir); | |
836 | } | |
837 | ||
838 | static int record__mmap_evlist(struct record *rec, | |
839 | struct evlist *evlist) | |
840 | { | |
841 | struct record_opts *opts = &rec->opts; | |
842 | bool auxtrace_overwrite = opts->auxtrace_snapshot_mode || | |
843 | opts->auxtrace_sample_mode; | |
844 | char msg[512]; | |
845 | ||
846 | if (opts->affinity != PERF_AFFINITY_SYS) | |
847 | cpu__setup_cpunode_map(); | |
848 | ||
849 | if (evlist__mmap_ex(evlist, opts->mmap_pages, | |
850 | opts->auxtrace_mmap_pages, | |
851 | auxtrace_overwrite, | |
852 | opts->nr_cblocks, opts->affinity, | |
853 | opts->mmap_flush, opts->comp_level) < 0) { | |
854 | if (errno == EPERM) { | |
855 | pr_err("Permission error mapping pages.\n" | |
856 | "Consider increasing " | |
857 | "/proc/sys/kernel/perf_event_mlock_kb,\n" | |
858 | "or try again with a smaller value of -m/--mmap_pages.\n" | |
859 | "(current value: %u,%u)\n", | |
860 | opts->mmap_pages, opts->auxtrace_mmap_pages); | |
861 | return -errno; | |
862 | } else { | |
863 | pr_err("failed to mmap with %d (%s)\n", errno, | |
864 | str_error_r(errno, msg, sizeof(msg))); | |
865 | if (errno) | |
866 | return -errno; | |
867 | else | |
868 | return -EINVAL; | |
869 | } | |
870 | } | |
871 | return 0; | |
872 | } | |
873 | ||
874 | static int record__mmap(struct record *rec) | |
875 | { | |
876 | return record__mmap_evlist(rec, rec->evlist); | |
877 | } | |
878 | ||
879 | static int record__open(struct record *rec) | |
880 | { | |
881 | char msg[BUFSIZ]; | |
882 | struct evsel *pos; | |
883 | struct evlist *evlist = rec->evlist; | |
884 | struct perf_session *session = rec->session; | |
885 | struct record_opts *opts = &rec->opts; | |
886 | int rc = 0; | |
887 | ||
888 | /* | |
889 | * For initial_delay or system wide, we need to add a dummy event so | |
890 | * that we can track PERF_RECORD_MMAP to cover the delay of waiting or | |
891 | * event synthesis. | |
892 | */ | |
893 | if (opts->initial_delay || target__has_cpu(&opts->target)) { | |
894 | pos = perf_evlist__get_tracking_event(evlist); | |
895 | if (!evsel__is_dummy_event(pos)) { | |
896 | /* Set up dummy event. */ | |
897 | if (evlist__add_dummy(evlist)) | |
898 | return -ENOMEM; | |
899 | pos = evlist__last(evlist); | |
900 | perf_evlist__set_tracking_event(evlist, pos); | |
901 | } | |
902 | ||
903 | /* | |
904 | * Enable the dummy event when the process is forked for | |
905 | * initial_delay, immediately for system wide. | |
906 | */ | |
907 | if (opts->initial_delay && !pos->immediate) | |
908 | pos->core.attr.enable_on_exec = 1; | |
909 | else | |
910 | pos->immediate = 1; | |
911 | } | |
912 | ||
913 | perf_evlist__config(evlist, opts, &callchain_param); | |
914 | ||
915 | evlist__for_each_entry(evlist, pos) { | |
916 | try_again: | |
917 | if (evsel__open(pos, pos->core.cpus, pos->core.threads) < 0) { | |
918 | if (evsel__fallback(pos, errno, msg, sizeof(msg))) { | |
919 | if (verbose > 0) | |
920 | ui__warning("%s\n", msg); | |
921 | goto try_again; | |
922 | } | |
923 | if ((errno == EINVAL || errno == EBADF) && | |
924 | pos->leader != pos && | |
925 | pos->weak_group) { | |
926 | pos = perf_evlist__reset_weak_group(evlist, pos, true); | |
927 | goto try_again; | |
928 | } | |
929 | rc = -errno; | |
930 | evsel__open_strerror(pos, &opts->target, errno, msg, sizeof(msg)); | |
931 | ui__error("%s\n", msg); | |
932 | goto out; | |
933 | } | |
934 | ||
935 | pos->supported = true; | |
936 | } | |
937 | ||
938 | if (symbol_conf.kptr_restrict && !perf_evlist__exclude_kernel(evlist)) { | |
939 | pr_warning( | |
940 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
941 | "check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" | |
942 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
943 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
944 | "Samples in kernel modules won't be resolved at all.\n\n" | |
945 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
946 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
947 | } | |
948 | ||
949 | if (perf_evlist__apply_filters(evlist, &pos)) { | |
950 | pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", | |
951 | pos->filter, evsel__name(pos), errno, | |
952 | str_error_r(errno, msg, sizeof(msg))); | |
953 | rc = -1; | |
954 | goto out; | |
955 | } | |
956 | ||
957 | rc = record__mmap(rec); | |
958 | if (rc) | |
959 | goto out; | |
960 | ||
961 | session->evlist = evlist; | |
962 | perf_session__set_id_hdr_size(session); | |
963 | out: | |
964 | return rc; | |
965 | } | |
966 | ||
967 | static int process_sample_event(struct perf_tool *tool, | |
968 | union perf_event *event, | |
969 | struct perf_sample *sample, | |
970 | struct evsel *evsel, | |
971 | struct machine *machine) | |
972 | { | |
973 | struct record *rec = container_of(tool, struct record, tool); | |
974 | ||
975 | if (rec->evlist->first_sample_time == 0) | |
976 | rec->evlist->first_sample_time = sample->time; | |
977 | ||
978 | rec->evlist->last_sample_time = sample->time; | |
979 | ||
980 | if (rec->buildid_all) | |
981 | return 0; | |
982 | ||
983 | rec->samples++; | |
984 | return build_id__mark_dso_hit(tool, event, sample, evsel, machine); | |
985 | } | |
986 | ||
987 | static int process_buildids(struct record *rec) | |
988 | { | |
989 | struct perf_session *session = rec->session; | |
990 | ||
991 | if (perf_data__size(&rec->data) == 0) | |
992 | return 0; | |
993 | ||
994 | /* | |
995 | * During this process, it'll load kernel map and replace the | |
996 | * dso->long_name to a real pathname it found. In this case | |
997 | * we prefer the vmlinux path like | |
998 | * /lib/modules/3.16.4/build/vmlinux | |
999 | * | |
1000 | * rather than build-id path (in debug directory). | |
1001 | * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 | |
1002 | */ | |
1003 | symbol_conf.ignore_vmlinux_buildid = true; | |
1004 | ||
1005 | /* | |
1006 | * If --buildid-all is given, it marks all DSO regardless of hits, | |
1007 | * so no need to process samples. But if timestamp_boundary is enabled, | |
1008 | * it still needs to walk on all samples to get the timestamps of | |
1009 | * first/last samples. | |
1010 | */ | |
1011 | if (rec->buildid_all && !rec->timestamp_boundary) | |
1012 | rec->tool.sample = NULL; | |
1013 | ||
1014 | return perf_session__process_events(session); | |
1015 | } | |
1016 | ||
1017 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) | |
1018 | { | |
1019 | int err; | |
1020 | struct perf_tool *tool = data; | |
1021 | /* | |
1022 | *As for guest kernel when processing subcommand record&report, | |
1023 | *we arrange module mmap prior to guest kernel mmap and trigger | |
1024 | *a preload dso because default guest module symbols are loaded | |
1025 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
1026 | *method is used to avoid symbol missing when the first addr is | |
1027 | *in module instead of in guest kernel. | |
1028 | */ | |
1029 | err = perf_event__synthesize_modules(tool, process_synthesized_event, | |
1030 | machine); | |
1031 | if (err < 0) | |
1032 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
1033 | " relocation symbol.\n", machine->pid); | |
1034 | ||
1035 | /* | |
1036 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
1037 | * have no _text sometimes. | |
1038 | */ | |
1039 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, | |
1040 | machine); | |
1041 | if (err < 0) | |
1042 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
1043 | " relocation symbol.\n", machine->pid); | |
1044 | } | |
1045 | ||
1046 | static struct perf_event_header finished_round_event = { | |
1047 | .size = sizeof(struct perf_event_header), | |
1048 | .type = PERF_RECORD_FINISHED_ROUND, | |
1049 | }; | |
1050 | ||
1051 | static void record__adjust_affinity(struct record *rec, struct mmap *map) | |
1052 | { | |
1053 | if (rec->opts.affinity != PERF_AFFINITY_SYS && | |
1054 | !bitmap_equal(rec->affinity_mask.bits, map->affinity_mask.bits, | |
1055 | rec->affinity_mask.nbits)) { | |
1056 | bitmap_zero(rec->affinity_mask.bits, rec->affinity_mask.nbits); | |
1057 | bitmap_or(rec->affinity_mask.bits, rec->affinity_mask.bits, | |
1058 | map->affinity_mask.bits, rec->affinity_mask.nbits); | |
1059 | sched_setaffinity(0, MMAP_CPU_MASK_BYTES(&rec->affinity_mask), | |
1060 | (cpu_set_t *)rec->affinity_mask.bits); | |
1061 | if (verbose == 2) | |
1062 | mmap_cpu_mask__scnprintf(&rec->affinity_mask, "thread"); | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | static size_t process_comp_header(void *record, size_t increment) | |
1067 | { | |
1068 | struct perf_record_compressed *event = record; | |
1069 | size_t size = sizeof(*event); | |
1070 | ||
1071 | if (increment) { | |
1072 | event->header.size += increment; | |
1073 | return increment; | |
1074 | } | |
1075 | ||
1076 | event->header.type = PERF_RECORD_COMPRESSED; | |
1077 | event->header.size = size; | |
1078 | ||
1079 | return size; | |
1080 | } | |
1081 | ||
1082 | static size_t zstd_compress(struct perf_session *session, void *dst, size_t dst_size, | |
1083 | void *src, size_t src_size) | |
1084 | { | |
1085 | size_t compressed; | |
1086 | size_t max_record_size = PERF_SAMPLE_MAX_SIZE - sizeof(struct perf_record_compressed) - 1; | |
1087 | ||
1088 | compressed = zstd_compress_stream_to_records(&session->zstd_data, dst, dst_size, src, src_size, | |
1089 | max_record_size, process_comp_header); | |
1090 | ||
1091 | session->bytes_transferred += src_size; | |
1092 | session->bytes_compressed += compressed; | |
1093 | ||
1094 | return compressed; | |
1095 | } | |
1096 | ||
1097 | static int record__mmap_read_evlist(struct record *rec, struct evlist *evlist, | |
1098 | bool overwrite, bool synch) | |
1099 | { | |
1100 | u64 bytes_written = rec->bytes_written; | |
1101 | int i; | |
1102 | int rc = 0; | |
1103 | struct mmap *maps; | |
1104 | int trace_fd = rec->data.file.fd; | |
1105 | off_t off = 0; | |
1106 | ||
1107 | if (!evlist) | |
1108 | return 0; | |
1109 | ||
1110 | maps = overwrite ? evlist->overwrite_mmap : evlist->mmap; | |
1111 | if (!maps) | |
1112 | return 0; | |
1113 | ||
1114 | if (overwrite && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING) | |
1115 | return 0; | |
1116 | ||
1117 | if (record__aio_enabled(rec)) | |
1118 | off = record__aio_get_pos(trace_fd); | |
1119 | ||
1120 | for (i = 0; i < evlist->core.nr_mmaps; i++) { | |
1121 | u64 flush = 0; | |
1122 | struct mmap *map = &maps[i]; | |
1123 | ||
1124 | if (map->core.base) { | |
1125 | record__adjust_affinity(rec, map); | |
1126 | if (synch) { | |
1127 | flush = map->core.flush; | |
1128 | map->core.flush = 1; | |
1129 | } | |
1130 | if (!record__aio_enabled(rec)) { | |
1131 | if (perf_mmap__push(map, rec, record__pushfn) < 0) { | |
1132 | if (synch) | |
1133 | map->core.flush = flush; | |
1134 | rc = -1; | |
1135 | goto out; | |
1136 | } | |
1137 | } else { | |
1138 | if (record__aio_push(rec, map, &off) < 0) { | |
1139 | record__aio_set_pos(trace_fd, off); | |
1140 | if (synch) | |
1141 | map->core.flush = flush; | |
1142 | rc = -1; | |
1143 | goto out; | |
1144 | } | |
1145 | } | |
1146 | if (synch) | |
1147 | map->core.flush = flush; | |
1148 | } | |
1149 | ||
1150 | if (map->auxtrace_mmap.base && !rec->opts.auxtrace_snapshot_mode && | |
1151 | !rec->opts.auxtrace_sample_mode && | |
1152 | record__auxtrace_mmap_read(rec, map) != 0) { | |
1153 | rc = -1; | |
1154 | goto out; | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | if (record__aio_enabled(rec)) | |
1159 | record__aio_set_pos(trace_fd, off); | |
1160 | ||
1161 | /* | |
1162 | * Mark the round finished in case we wrote | |
1163 | * at least one event. | |
1164 | */ | |
1165 | if (bytes_written != rec->bytes_written) | |
1166 | rc = record__write(rec, NULL, &finished_round_event, sizeof(finished_round_event)); | |
1167 | ||
1168 | if (overwrite) | |
1169 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); | |
1170 | out: | |
1171 | return rc; | |
1172 | } | |
1173 | ||
1174 | static int record__mmap_read_all(struct record *rec, bool synch) | |
1175 | { | |
1176 | int err; | |
1177 | ||
1178 | err = record__mmap_read_evlist(rec, rec->evlist, false, synch); | |
1179 | if (err) | |
1180 | return err; | |
1181 | ||
1182 | return record__mmap_read_evlist(rec, rec->evlist, true, synch); | |
1183 | } | |
1184 | ||
1185 | static void record__init_features(struct record *rec) | |
1186 | { | |
1187 | struct perf_session *session = rec->session; | |
1188 | int feat; | |
1189 | ||
1190 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) | |
1191 | perf_header__set_feat(&session->header, feat); | |
1192 | ||
1193 | if (rec->no_buildid) | |
1194 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); | |
1195 | ||
1196 | if (!have_tracepoints(&rec->evlist->core.entries)) | |
1197 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); | |
1198 | ||
1199 | if (!rec->opts.branch_stack) | |
1200 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); | |
1201 | ||
1202 | if (!rec->opts.full_auxtrace) | |
1203 | perf_header__clear_feat(&session->header, HEADER_AUXTRACE); | |
1204 | ||
1205 | if (!(rec->opts.use_clockid && rec->opts.clockid_res_ns)) | |
1206 | perf_header__clear_feat(&session->header, HEADER_CLOCKID); | |
1207 | ||
1208 | if (!rec->opts.use_clockid) | |
1209 | perf_header__clear_feat(&session->header, HEADER_CLOCK_DATA); | |
1210 | ||
1211 | perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); | |
1212 | if (!record__comp_enabled(rec)) | |
1213 | perf_header__clear_feat(&session->header, HEADER_COMPRESSED); | |
1214 | ||
1215 | perf_header__clear_feat(&session->header, HEADER_STAT); | |
1216 | } | |
1217 | ||
1218 | static void | |
1219 | record__finish_output(struct record *rec) | |
1220 | { | |
1221 | struct perf_data *data = &rec->data; | |
1222 | int fd = perf_data__fd(data); | |
1223 | ||
1224 | if (data->is_pipe) | |
1225 | return; | |
1226 | ||
1227 | rec->session->header.data_size += rec->bytes_written; | |
1228 | data->file.size = lseek(perf_data__fd(data), 0, SEEK_CUR); | |
1229 | ||
1230 | if (!rec->no_buildid) { | |
1231 | process_buildids(rec); | |
1232 | ||
1233 | if (rec->buildid_all) | |
1234 | dsos__hit_all(rec->session); | |
1235 | } | |
1236 | perf_session__write_header(rec->session, rec->evlist, fd, true); | |
1237 | ||
1238 | return; | |
1239 | } | |
1240 | ||
1241 | static int record__synthesize_workload(struct record *rec, bool tail) | |
1242 | { | |
1243 | int err; | |
1244 | struct perf_thread_map *thread_map; | |
1245 | ||
1246 | if (rec->opts.tail_synthesize != tail) | |
1247 | return 0; | |
1248 | ||
1249 | thread_map = thread_map__new_by_tid(rec->evlist->workload.pid); | |
1250 | if (thread_map == NULL) | |
1251 | return -1; | |
1252 | ||
1253 | err = perf_event__synthesize_thread_map(&rec->tool, thread_map, | |
1254 | process_synthesized_event, | |
1255 | &rec->session->machines.host, | |
1256 | rec->opts.sample_address); | |
1257 | perf_thread_map__put(thread_map); | |
1258 | return err; | |
1259 | } | |
1260 | ||
1261 | static int record__synthesize(struct record *rec, bool tail); | |
1262 | ||
1263 | static int | |
1264 | record__switch_output(struct record *rec, bool at_exit) | |
1265 | { | |
1266 | struct perf_data *data = &rec->data; | |
1267 | int fd, err; | |
1268 | char *new_filename; | |
1269 | ||
1270 | /* Same Size: "2015122520103046"*/ | |
1271 | char timestamp[] = "InvalidTimestamp"; | |
1272 | ||
1273 | record__aio_mmap_read_sync(rec); | |
1274 | ||
1275 | record__synthesize(rec, true); | |
1276 | if (target__none(&rec->opts.target)) | |
1277 | record__synthesize_workload(rec, true); | |
1278 | ||
1279 | rec->samples = 0; | |
1280 | record__finish_output(rec); | |
1281 | err = fetch_current_timestamp(timestamp, sizeof(timestamp)); | |
1282 | if (err) { | |
1283 | pr_err("Failed to get current timestamp\n"); | |
1284 | return -EINVAL; | |
1285 | } | |
1286 | ||
1287 | fd = perf_data__switch(data, timestamp, | |
1288 | rec->session->header.data_offset, | |
1289 | at_exit, &new_filename); | |
1290 | if (fd >= 0 && !at_exit) { | |
1291 | rec->bytes_written = 0; | |
1292 | rec->session->header.data_size = 0; | |
1293 | } | |
1294 | ||
1295 | if (!quiet) | |
1296 | fprintf(stderr, "[ perf record: Dump %s.%s ]\n", | |
1297 | data->path, timestamp); | |
1298 | ||
1299 | if (rec->switch_output.num_files) { | |
1300 | int n = rec->switch_output.cur_file + 1; | |
1301 | ||
1302 | if (n >= rec->switch_output.num_files) | |
1303 | n = 0; | |
1304 | rec->switch_output.cur_file = n; | |
1305 | if (rec->switch_output.filenames[n]) { | |
1306 | remove(rec->switch_output.filenames[n]); | |
1307 | zfree(&rec->switch_output.filenames[n]); | |
1308 | } | |
1309 | rec->switch_output.filenames[n] = new_filename; | |
1310 | } else { | |
1311 | free(new_filename); | |
1312 | } | |
1313 | ||
1314 | /* Output tracking events */ | |
1315 | if (!at_exit) { | |
1316 | record__synthesize(rec, false); | |
1317 | ||
1318 | /* | |
1319 | * In 'perf record --switch-output' without -a, | |
1320 | * record__synthesize() in record__switch_output() won't | |
1321 | * generate tracking events because there's no thread_map | |
1322 | * in evlist. Which causes newly created perf.data doesn't | |
1323 | * contain map and comm information. | |
1324 | * Create a fake thread_map and directly call | |
1325 | * perf_event__synthesize_thread_map() for those events. | |
1326 | */ | |
1327 | if (target__none(&rec->opts.target)) | |
1328 | record__synthesize_workload(rec, false); | |
1329 | } | |
1330 | return fd; | |
1331 | } | |
1332 | ||
1333 | static volatile int workload_exec_errno; | |
1334 | ||
1335 | /* | |
1336 | * perf_evlist__prepare_workload will send a SIGUSR1 | |
1337 | * if the fork fails, since we asked by setting its | |
1338 | * want_signal to true. | |
1339 | */ | |
1340 | static void workload_exec_failed_signal(int signo __maybe_unused, | |
1341 | siginfo_t *info, | |
1342 | void *ucontext __maybe_unused) | |
1343 | { | |
1344 | workload_exec_errno = info->si_value.sival_int; | |
1345 | done = 1; | |
1346 | child_finished = 1; | |
1347 | } | |
1348 | ||
1349 | static void snapshot_sig_handler(int sig); | |
1350 | static void alarm_sig_handler(int sig); | |
1351 | ||
1352 | static const struct perf_event_mmap_page * | |
1353 | perf_evlist__pick_pc(struct evlist *evlist) | |
1354 | { | |
1355 | if (evlist) { | |
1356 | if (evlist->mmap && evlist->mmap[0].core.base) | |
1357 | return evlist->mmap[0].core.base; | |
1358 | if (evlist->overwrite_mmap && evlist->overwrite_mmap[0].core.base) | |
1359 | return evlist->overwrite_mmap[0].core.base; | |
1360 | } | |
1361 | return NULL; | |
1362 | } | |
1363 | ||
1364 | static const struct perf_event_mmap_page *record__pick_pc(struct record *rec) | |
1365 | { | |
1366 | const struct perf_event_mmap_page *pc; | |
1367 | ||
1368 | pc = perf_evlist__pick_pc(rec->evlist); | |
1369 | if (pc) | |
1370 | return pc; | |
1371 | return NULL; | |
1372 | } | |
1373 | ||
1374 | static int record__synthesize(struct record *rec, bool tail) | |
1375 | { | |
1376 | struct perf_session *session = rec->session; | |
1377 | struct machine *machine = &session->machines.host; | |
1378 | struct perf_data *data = &rec->data; | |
1379 | struct record_opts *opts = &rec->opts; | |
1380 | struct perf_tool *tool = &rec->tool; | |
1381 | int fd = perf_data__fd(data); | |
1382 | int err = 0; | |
1383 | event_op f = process_synthesized_event; | |
1384 | ||
1385 | if (rec->opts.tail_synthesize != tail) | |
1386 | return 0; | |
1387 | ||
1388 | if (data->is_pipe) { | |
1389 | /* | |
1390 | * We need to synthesize events first, because some | |
1391 | * features works on top of them (on report side). | |
1392 | */ | |
1393 | err = perf_event__synthesize_attrs(tool, rec->evlist, | |
1394 | process_synthesized_event); | |
1395 | if (err < 0) { | |
1396 | pr_err("Couldn't synthesize attrs.\n"); | |
1397 | goto out; | |
1398 | } | |
1399 | ||
1400 | err = perf_event__synthesize_features(tool, session, rec->evlist, | |
1401 | process_synthesized_event); | |
1402 | if (err < 0) { | |
1403 | pr_err("Couldn't synthesize features.\n"); | |
1404 | return err; | |
1405 | } | |
1406 | ||
1407 | if (have_tracepoints(&rec->evlist->core.entries)) { | |
1408 | /* | |
1409 | * FIXME err <= 0 here actually means that | |
1410 | * there were no tracepoints so its not really | |
1411 | * an error, just that we don't need to | |
1412 | * synthesize anything. We really have to | |
1413 | * return this more properly and also | |
1414 | * propagate errors that now are calling die() | |
1415 | */ | |
1416 | err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist, | |
1417 | process_synthesized_event); | |
1418 | if (err <= 0) { | |
1419 | pr_err("Couldn't record tracing data.\n"); | |
1420 | goto out; | |
1421 | } | |
1422 | rec->bytes_written += err; | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | err = perf_event__synth_time_conv(record__pick_pc(rec), tool, | |
1427 | process_synthesized_event, machine); | |
1428 | if (err) | |
1429 | goto out; | |
1430 | ||
1431 | /* Synthesize id_index before auxtrace_info */ | |
1432 | if (rec->opts.auxtrace_sample_mode) { | |
1433 | err = perf_event__synthesize_id_index(tool, | |
1434 | process_synthesized_event, | |
1435 | session->evlist, machine); | |
1436 | if (err) | |
1437 | goto out; | |
1438 | } | |
1439 | ||
1440 | if (rec->opts.full_auxtrace) { | |
1441 | err = perf_event__synthesize_auxtrace_info(rec->itr, tool, | |
1442 | session, process_synthesized_event); | |
1443 | if (err) | |
1444 | goto out; | |
1445 | } | |
1446 | ||
1447 | if (!perf_evlist__exclude_kernel(rec->evlist)) { | |
1448 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, | |
1449 | machine); | |
1450 | WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n" | |
1451 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
1452 | "Check /proc/kallsyms permission or run as root.\n"); | |
1453 | ||
1454 | err = perf_event__synthesize_modules(tool, process_synthesized_event, | |
1455 | machine); | |
1456 | WARN_ONCE(err < 0, "Couldn't record kernel module information.\n" | |
1457 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
1458 | "Check /proc/modules permission or run as root.\n"); | |
1459 | } | |
1460 | ||
1461 | if (perf_guest) { | |
1462 | machines__process_guests(&session->machines, | |
1463 | perf_event__synthesize_guest_os, tool); | |
1464 | } | |
1465 | ||
1466 | err = perf_event__synthesize_extra_attr(&rec->tool, | |
1467 | rec->evlist, | |
1468 | process_synthesized_event, | |
1469 | data->is_pipe); | |
1470 | if (err) | |
1471 | goto out; | |
1472 | ||
1473 | err = perf_event__synthesize_thread_map2(&rec->tool, rec->evlist->core.threads, | |
1474 | process_synthesized_event, | |
1475 | NULL); | |
1476 | if (err < 0) { | |
1477 | pr_err("Couldn't synthesize thread map.\n"); | |
1478 | return err; | |
1479 | } | |
1480 | ||
1481 | err = perf_event__synthesize_cpu_map(&rec->tool, rec->evlist->core.cpus, | |
1482 | process_synthesized_event, NULL); | |
1483 | if (err < 0) { | |
1484 | pr_err("Couldn't synthesize cpu map.\n"); | |
1485 | return err; | |
1486 | } | |
1487 | ||
1488 | err = perf_event__synthesize_bpf_events(session, process_synthesized_event, | |
1489 | machine, opts); | |
1490 | if (err < 0) | |
1491 | pr_warning("Couldn't synthesize bpf events.\n"); | |
1492 | ||
1493 | err = perf_event__synthesize_cgroups(tool, process_synthesized_event, | |
1494 | machine); | |
1495 | if (err < 0) | |
1496 | pr_warning("Couldn't synthesize cgroup events.\n"); | |
1497 | ||
1498 | if (rec->opts.nr_threads_synthesize > 1) { | |
1499 | perf_set_multithreaded(); | |
1500 | f = process_locked_synthesized_event; | |
1501 | } | |
1502 | ||
1503 | err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->core.threads, | |
1504 | f, opts->sample_address, | |
1505 | rec->opts.nr_threads_synthesize); | |
1506 | ||
1507 | if (rec->opts.nr_threads_synthesize > 1) | |
1508 | perf_set_singlethreaded(); | |
1509 | ||
1510 | out: | |
1511 | return err; | |
1512 | } | |
1513 | ||
1514 | static int record__process_signal_event(union perf_event *event __maybe_unused, void *data) | |
1515 | { | |
1516 | struct record *rec = data; | |
1517 | pthread_kill(rec->thread_id, SIGUSR2); | |
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | static int record__setup_sb_evlist(struct record *rec) | |
1522 | { | |
1523 | struct record_opts *opts = &rec->opts; | |
1524 | ||
1525 | if (rec->sb_evlist != NULL) { | |
1526 | /* | |
1527 | * We get here if --switch-output-event populated the | |
1528 | * sb_evlist, so associate a callback that will send a SIGUSR2 | |
1529 | * to the main thread. | |
1530 | */ | |
1531 | evlist__set_cb(rec->sb_evlist, record__process_signal_event, rec); | |
1532 | rec->thread_id = pthread_self(); | |
1533 | } | |
1534 | #ifdef HAVE_LIBBPF_SUPPORT | |
1535 | if (!opts->no_bpf_event) { | |
1536 | if (rec->sb_evlist == NULL) { | |
1537 | rec->sb_evlist = evlist__new(); | |
1538 | ||
1539 | if (rec->sb_evlist == NULL) { | |
1540 | pr_err("Couldn't create side band evlist.\n."); | |
1541 | return -1; | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | if (evlist__add_bpf_sb_event(rec->sb_evlist, &rec->session->header.env)) { | |
1546 | pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n."); | |
1547 | return -1; | |
1548 | } | |
1549 | } | |
1550 | #endif | |
1551 | if (perf_evlist__start_sb_thread(rec->sb_evlist, &rec->opts.target)) { | |
1552 | pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n"); | |
1553 | opts->no_bpf_event = true; | |
1554 | } | |
1555 | ||
1556 | return 0; | |
1557 | } | |
1558 | ||
1559 | static int record__init_clock(struct record *rec) | |
1560 | { | |
1561 | struct perf_session *session = rec->session; | |
1562 | struct timespec ref_clockid; | |
1563 | struct timeval ref_tod; | |
1564 | u64 ref; | |
1565 | ||
1566 | if (!rec->opts.use_clockid) | |
1567 | return 0; | |
1568 | ||
1569 | if (rec->opts.use_clockid && rec->opts.clockid_res_ns) | |
1570 | session->header.env.clock.clockid_res_ns = rec->opts.clockid_res_ns; | |
1571 | ||
1572 | session->header.env.clock.clockid = rec->opts.clockid; | |
1573 | ||
1574 | if (gettimeofday(&ref_tod, NULL) != 0) { | |
1575 | pr_err("gettimeofday failed, cannot set reference time.\n"); | |
1576 | return -1; | |
1577 | } | |
1578 | ||
1579 | if (clock_gettime(rec->opts.clockid, &ref_clockid)) { | |
1580 | pr_err("clock_gettime failed, cannot set reference time.\n"); | |
1581 | return -1; | |
1582 | } | |
1583 | ||
1584 | ref = (u64) ref_tod.tv_sec * NSEC_PER_SEC + | |
1585 | (u64) ref_tod.tv_usec * NSEC_PER_USEC; | |
1586 | ||
1587 | session->header.env.clock.tod_ns = ref; | |
1588 | ||
1589 | ref = (u64) ref_clockid.tv_sec * NSEC_PER_SEC + | |
1590 | (u64) ref_clockid.tv_nsec; | |
1591 | ||
1592 | session->header.env.clock.clockid_ns = ref; | |
1593 | return 0; | |
1594 | } | |
1595 | ||
1596 | static void hit_auxtrace_snapshot_trigger(struct record *rec) | |
1597 | { | |
1598 | if (trigger_is_ready(&auxtrace_snapshot_trigger)) { | |
1599 | trigger_hit(&auxtrace_snapshot_trigger); | |
1600 | auxtrace_record__snapshot_started = 1; | |
1601 | if (auxtrace_record__snapshot_start(rec->itr)) | |
1602 | trigger_error(&auxtrace_snapshot_trigger); | |
1603 | } | |
1604 | } | |
1605 | ||
1606 | static int __cmd_record(struct record *rec, int argc, const char **argv) | |
1607 | { | |
1608 | int err; | |
1609 | int status = 0; | |
1610 | unsigned long waking = 0; | |
1611 | const bool forks = argc > 0; | |
1612 | struct perf_tool *tool = &rec->tool; | |
1613 | struct record_opts *opts = &rec->opts; | |
1614 | struct perf_data *data = &rec->data; | |
1615 | struct perf_session *session; | |
1616 | bool disabled = false, draining = false; | |
1617 | int fd; | |
1618 | float ratio = 0; | |
1619 | enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED; | |
1620 | ||
1621 | atexit(record__sig_exit); | |
1622 | signal(SIGCHLD, sig_handler); | |
1623 | signal(SIGINT, sig_handler); | |
1624 | signal(SIGTERM, sig_handler); | |
1625 | signal(SIGSEGV, sigsegv_handler); | |
1626 | ||
1627 | if (rec->opts.record_namespaces) | |
1628 | tool->namespace_events = true; | |
1629 | ||
1630 | if (rec->opts.record_cgroup) { | |
1631 | #ifdef HAVE_FILE_HANDLE | |
1632 | tool->cgroup_events = true; | |
1633 | #else | |
1634 | pr_err("cgroup tracking is not supported\n"); | |
1635 | return -1; | |
1636 | #endif | |
1637 | } | |
1638 | ||
1639 | if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) { | |
1640 | signal(SIGUSR2, snapshot_sig_handler); | |
1641 | if (rec->opts.auxtrace_snapshot_mode) | |
1642 | trigger_on(&auxtrace_snapshot_trigger); | |
1643 | if (rec->switch_output.enabled) | |
1644 | trigger_on(&switch_output_trigger); | |
1645 | } else { | |
1646 | signal(SIGUSR2, SIG_IGN); | |
1647 | } | |
1648 | ||
1649 | session = perf_session__new(data, false, tool); | |
1650 | if (IS_ERR(session)) { | |
1651 | pr_err("Perf session creation failed.\n"); | |
1652 | return PTR_ERR(session); | |
1653 | } | |
1654 | ||
1655 | fd = perf_data__fd(data); | |
1656 | rec->session = session; | |
1657 | ||
1658 | if (zstd_init(&session->zstd_data, rec->opts.comp_level) < 0) { | |
1659 | pr_err("Compression initialization failed.\n"); | |
1660 | return -1; | |
1661 | } | |
1662 | #ifdef HAVE_EVENTFD_SUPPORT | |
1663 | done_fd = eventfd(0, EFD_NONBLOCK); | |
1664 | if (done_fd < 0) { | |
1665 | pr_err("Failed to create wakeup eventfd, error: %m\n"); | |
1666 | status = -1; | |
1667 | goto out_delete_session; | |
1668 | } | |
1669 | err = evlist__add_pollfd(rec->evlist, done_fd); | |
1670 | if (err < 0) { | |
1671 | pr_err("Failed to add wakeup eventfd to poll list\n"); | |
1672 | status = err; | |
1673 | goto out_delete_session; | |
1674 | } | |
1675 | #endif // HAVE_EVENTFD_SUPPORT | |
1676 | ||
1677 | session->header.env.comp_type = PERF_COMP_ZSTD; | |
1678 | session->header.env.comp_level = rec->opts.comp_level; | |
1679 | ||
1680 | if (rec->opts.kcore && | |
1681 | !record__kcore_readable(&session->machines.host)) { | |
1682 | pr_err("ERROR: kcore is not readable.\n"); | |
1683 | return -1; | |
1684 | } | |
1685 | ||
1686 | if (record__init_clock(rec)) | |
1687 | return -1; | |
1688 | ||
1689 | record__init_features(rec); | |
1690 | ||
1691 | if (forks) { | |
1692 | err = perf_evlist__prepare_workload(rec->evlist, &opts->target, | |
1693 | argv, data->is_pipe, | |
1694 | workload_exec_failed_signal); | |
1695 | if (err < 0) { | |
1696 | pr_err("Couldn't run the workload!\n"); | |
1697 | status = err; | |
1698 | goto out_delete_session; | |
1699 | } | |
1700 | } | |
1701 | ||
1702 | /* | |
1703 | * If we have just single event and are sending data | |
1704 | * through pipe, we need to force the ids allocation, | |
1705 | * because we synthesize event name through the pipe | |
1706 | * and need the id for that. | |
1707 | */ | |
1708 | if (data->is_pipe && rec->evlist->core.nr_entries == 1) | |
1709 | rec->opts.sample_id = true; | |
1710 | ||
1711 | if (record__open(rec) != 0) { | |
1712 | err = -1; | |
1713 | goto out_child; | |
1714 | } | |
1715 | session->header.env.comp_mmap_len = session->evlist->core.mmap_len; | |
1716 | ||
1717 | if (rec->opts.kcore) { | |
1718 | err = record__kcore_copy(&session->machines.host, data); | |
1719 | if (err) { | |
1720 | pr_err("ERROR: Failed to copy kcore\n"); | |
1721 | goto out_child; | |
1722 | } | |
1723 | } | |
1724 | ||
1725 | err = bpf__apply_obj_config(); | |
1726 | if (err) { | |
1727 | char errbuf[BUFSIZ]; | |
1728 | ||
1729 | bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); | |
1730 | pr_err("ERROR: Apply config to BPF failed: %s\n", | |
1731 | errbuf); | |
1732 | goto out_child; | |
1733 | } | |
1734 | ||
1735 | /* | |
1736 | * Normally perf_session__new would do this, but it doesn't have the | |
1737 | * evlist. | |
1738 | */ | |
1739 | if (rec->tool.ordered_events && !evlist__sample_id_all(rec->evlist)) { | |
1740 | pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n"); | |
1741 | rec->tool.ordered_events = false; | |
1742 | } | |
1743 | ||
1744 | if (!rec->evlist->nr_groups) | |
1745 | perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); | |
1746 | ||
1747 | if (data->is_pipe) { | |
1748 | err = perf_header__write_pipe(fd); | |
1749 | if (err < 0) | |
1750 | goto out_child; | |
1751 | } else { | |
1752 | err = perf_session__write_header(session, rec->evlist, fd, false); | |
1753 | if (err < 0) | |
1754 | goto out_child; | |
1755 | } | |
1756 | ||
1757 | err = -1; | |
1758 | if (!rec->no_buildid | |
1759 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { | |
1760 | pr_err("Couldn't generate buildids. " | |
1761 | "Use --no-buildid to profile anyway.\n"); | |
1762 | goto out_child; | |
1763 | } | |
1764 | ||
1765 | err = record__setup_sb_evlist(rec); | |
1766 | if (err) | |
1767 | goto out_child; | |
1768 | ||
1769 | err = record__synthesize(rec, false); | |
1770 | if (err < 0) | |
1771 | goto out_child; | |
1772 | ||
1773 | if (rec->realtime_prio) { | |
1774 | struct sched_param param; | |
1775 | ||
1776 | param.sched_priority = rec->realtime_prio; | |
1777 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
1778 | pr_err("Could not set realtime priority.\n"); | |
1779 | err = -1; | |
1780 | goto out_child; | |
1781 | } | |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * When perf is starting the traced process, all the events | |
1786 | * (apart from group members) have enable_on_exec=1 set, | |
1787 | * so don't spoil it by prematurely enabling them. | |
1788 | */ | |
1789 | if (!target__none(&opts->target) && !opts->initial_delay) | |
1790 | evlist__enable(rec->evlist); | |
1791 | ||
1792 | /* | |
1793 | * Let the child rip | |
1794 | */ | |
1795 | if (forks) { | |
1796 | struct machine *machine = &session->machines.host; | |
1797 | union perf_event *event; | |
1798 | pid_t tgid; | |
1799 | ||
1800 | event = malloc(sizeof(event->comm) + machine->id_hdr_size); | |
1801 | if (event == NULL) { | |
1802 | err = -ENOMEM; | |
1803 | goto out_child; | |
1804 | } | |
1805 | ||
1806 | /* | |
1807 | * Some H/W events are generated before COMM event | |
1808 | * which is emitted during exec(), so perf script | |
1809 | * cannot see a correct process name for those events. | |
1810 | * Synthesize COMM event to prevent it. | |
1811 | */ | |
1812 | tgid = perf_event__synthesize_comm(tool, event, | |
1813 | rec->evlist->workload.pid, | |
1814 | process_synthesized_event, | |
1815 | machine); | |
1816 | free(event); | |
1817 | ||
1818 | if (tgid == -1) | |
1819 | goto out_child; | |
1820 | ||
1821 | event = malloc(sizeof(event->namespaces) + | |
1822 | (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + | |
1823 | machine->id_hdr_size); | |
1824 | if (event == NULL) { | |
1825 | err = -ENOMEM; | |
1826 | goto out_child; | |
1827 | } | |
1828 | ||
1829 | /* | |
1830 | * Synthesize NAMESPACES event for the command specified. | |
1831 | */ | |
1832 | perf_event__synthesize_namespaces(tool, event, | |
1833 | rec->evlist->workload.pid, | |
1834 | tgid, process_synthesized_event, | |
1835 | machine); | |
1836 | free(event); | |
1837 | ||
1838 | perf_evlist__start_workload(rec->evlist); | |
1839 | } | |
1840 | ||
1841 | if (evlist__initialize_ctlfd(rec->evlist, opts->ctl_fd, opts->ctl_fd_ack)) | |
1842 | goto out_child; | |
1843 | ||
1844 | if (opts->initial_delay) { | |
1845 | pr_info(EVLIST_DISABLED_MSG); | |
1846 | if (opts->initial_delay > 0) { | |
1847 | usleep(opts->initial_delay * USEC_PER_MSEC); | |
1848 | evlist__enable(rec->evlist); | |
1849 | pr_info(EVLIST_ENABLED_MSG); | |
1850 | } | |
1851 | } | |
1852 | ||
1853 | trigger_ready(&auxtrace_snapshot_trigger); | |
1854 | trigger_ready(&switch_output_trigger); | |
1855 | perf_hooks__invoke_record_start(); | |
1856 | for (;;) { | |
1857 | unsigned long long hits = rec->samples; | |
1858 | ||
1859 | /* | |
1860 | * rec->evlist->bkw_mmap_state is possible to be | |
1861 | * BKW_MMAP_EMPTY here: when done == true and | |
1862 | * hits != rec->samples in previous round. | |
1863 | * | |
1864 | * perf_evlist__toggle_bkw_mmap ensure we never | |
1865 | * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING. | |
1866 | */ | |
1867 | if (trigger_is_hit(&switch_output_trigger) || done || draining) | |
1868 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING); | |
1869 | ||
1870 | if (record__mmap_read_all(rec, false) < 0) { | |
1871 | trigger_error(&auxtrace_snapshot_trigger); | |
1872 | trigger_error(&switch_output_trigger); | |
1873 | err = -1; | |
1874 | goto out_child; | |
1875 | } | |
1876 | ||
1877 | if (auxtrace_record__snapshot_started) { | |
1878 | auxtrace_record__snapshot_started = 0; | |
1879 | if (!trigger_is_error(&auxtrace_snapshot_trigger)) | |
1880 | record__read_auxtrace_snapshot(rec, false); | |
1881 | if (trigger_is_error(&auxtrace_snapshot_trigger)) { | |
1882 | pr_err("AUX area tracing snapshot failed\n"); | |
1883 | err = -1; | |
1884 | goto out_child; | |
1885 | } | |
1886 | } | |
1887 | ||
1888 | if (trigger_is_hit(&switch_output_trigger)) { | |
1889 | /* | |
1890 | * If switch_output_trigger is hit, the data in | |
1891 | * overwritable ring buffer should have been collected, | |
1892 | * so bkw_mmap_state should be set to BKW_MMAP_EMPTY. | |
1893 | * | |
1894 | * If SIGUSR2 raise after or during record__mmap_read_all(), | |
1895 | * record__mmap_read_all() didn't collect data from | |
1896 | * overwritable ring buffer. Read again. | |
1897 | */ | |
1898 | if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING) | |
1899 | continue; | |
1900 | trigger_ready(&switch_output_trigger); | |
1901 | ||
1902 | /* | |
1903 | * Reenable events in overwrite ring buffer after | |
1904 | * record__mmap_read_all(): we should have collected | |
1905 | * data from it. | |
1906 | */ | |
1907 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING); | |
1908 | ||
1909 | if (!quiet) | |
1910 | fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n", | |
1911 | waking); | |
1912 | waking = 0; | |
1913 | fd = record__switch_output(rec, false); | |
1914 | if (fd < 0) { | |
1915 | pr_err("Failed to switch to new file\n"); | |
1916 | trigger_error(&switch_output_trigger); | |
1917 | err = fd; | |
1918 | goto out_child; | |
1919 | } | |
1920 | ||
1921 | /* re-arm the alarm */ | |
1922 | if (rec->switch_output.time) | |
1923 | alarm(rec->switch_output.time); | |
1924 | } | |
1925 | ||
1926 | if (hits == rec->samples) { | |
1927 | if (done || draining) | |
1928 | break; | |
1929 | err = evlist__poll(rec->evlist, -1); | |
1930 | /* | |
1931 | * Propagate error, only if there's any. Ignore positive | |
1932 | * number of returned events and interrupt error. | |
1933 | */ | |
1934 | if (err > 0 || (err < 0 && errno == EINTR)) | |
1935 | err = 0; | |
1936 | waking++; | |
1937 | ||
1938 | if (evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0) | |
1939 | draining = true; | |
1940 | } | |
1941 | ||
1942 | if (evlist__ctlfd_process(rec->evlist, &cmd) > 0) { | |
1943 | switch (cmd) { | |
1944 | case EVLIST_CTL_CMD_ENABLE: | |
1945 | pr_info(EVLIST_ENABLED_MSG); | |
1946 | break; | |
1947 | case EVLIST_CTL_CMD_DISABLE: | |
1948 | pr_info(EVLIST_DISABLED_MSG); | |
1949 | break; | |
1950 | case EVLIST_CTL_CMD_SNAPSHOT: | |
1951 | hit_auxtrace_snapshot_trigger(rec); | |
1952 | evlist__ctlfd_ack(rec->evlist); | |
1953 | break; | |
1954 | case EVLIST_CTL_CMD_ACK: | |
1955 | case EVLIST_CTL_CMD_UNSUPPORTED: | |
1956 | default: | |
1957 | break; | |
1958 | } | |
1959 | } | |
1960 | ||
1961 | /* | |
1962 | * When perf is starting the traced process, at the end events | |
1963 | * die with the process and we wait for that. Thus no need to | |
1964 | * disable events in this case. | |
1965 | */ | |
1966 | if (done && !disabled && !target__none(&opts->target)) { | |
1967 | trigger_off(&auxtrace_snapshot_trigger); | |
1968 | evlist__disable(rec->evlist); | |
1969 | disabled = true; | |
1970 | } | |
1971 | } | |
1972 | ||
1973 | trigger_off(&auxtrace_snapshot_trigger); | |
1974 | trigger_off(&switch_output_trigger); | |
1975 | ||
1976 | if (opts->auxtrace_snapshot_on_exit) | |
1977 | record__auxtrace_snapshot_exit(rec); | |
1978 | ||
1979 | if (forks && workload_exec_errno) { | |
1980 | char msg[STRERR_BUFSIZE]; | |
1981 | const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); | |
1982 | pr_err("Workload failed: %s\n", emsg); | |
1983 | err = -1; | |
1984 | goto out_child; | |
1985 | } | |
1986 | ||
1987 | if (!quiet) | |
1988 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); | |
1989 | ||
1990 | if (target__none(&rec->opts.target)) | |
1991 | record__synthesize_workload(rec, true); | |
1992 | ||
1993 | out_child: | |
1994 | evlist__finalize_ctlfd(rec->evlist); | |
1995 | record__mmap_read_all(rec, true); | |
1996 | record__aio_mmap_read_sync(rec); | |
1997 | ||
1998 | if (rec->session->bytes_transferred && rec->session->bytes_compressed) { | |
1999 | ratio = (float)rec->session->bytes_transferred/(float)rec->session->bytes_compressed; | |
2000 | session->header.env.comp_ratio = ratio + 0.5; | |
2001 | } | |
2002 | ||
2003 | if (forks) { | |
2004 | int exit_status; | |
2005 | ||
2006 | if (!child_finished) | |
2007 | kill(rec->evlist->workload.pid, SIGTERM); | |
2008 | ||
2009 | wait(&exit_status); | |
2010 | ||
2011 | if (err < 0) | |
2012 | status = err; | |
2013 | else if (WIFEXITED(exit_status)) | |
2014 | status = WEXITSTATUS(exit_status); | |
2015 | else if (WIFSIGNALED(exit_status)) | |
2016 | signr = WTERMSIG(exit_status); | |
2017 | } else | |
2018 | status = err; | |
2019 | ||
2020 | record__synthesize(rec, true); | |
2021 | /* this will be recalculated during process_buildids() */ | |
2022 | rec->samples = 0; | |
2023 | ||
2024 | if (!err) { | |
2025 | if (!rec->timestamp_filename) { | |
2026 | record__finish_output(rec); | |
2027 | } else { | |
2028 | fd = record__switch_output(rec, true); | |
2029 | if (fd < 0) { | |
2030 | status = fd; | |
2031 | goto out_delete_session; | |
2032 | } | |
2033 | } | |
2034 | } | |
2035 | ||
2036 | perf_hooks__invoke_record_end(); | |
2037 | ||
2038 | if (!err && !quiet) { | |
2039 | char samples[128]; | |
2040 | const char *postfix = rec->timestamp_filename ? | |
2041 | ".<timestamp>" : ""; | |
2042 | ||
2043 | if (rec->samples && !rec->opts.full_auxtrace) | |
2044 | scnprintf(samples, sizeof(samples), | |
2045 | " (%" PRIu64 " samples)", rec->samples); | |
2046 | else | |
2047 | samples[0] = '\0'; | |
2048 | ||
2049 | fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s", | |
2050 | perf_data__size(data) / 1024.0 / 1024.0, | |
2051 | data->path, postfix, samples); | |
2052 | if (ratio) { | |
2053 | fprintf(stderr, ", compressed (original %.3f MB, ratio is %.3f)", | |
2054 | rec->session->bytes_transferred / 1024.0 / 1024.0, | |
2055 | ratio); | |
2056 | } | |
2057 | fprintf(stderr, " ]\n"); | |
2058 | } | |
2059 | ||
2060 | out_delete_session: | |
2061 | #ifdef HAVE_EVENTFD_SUPPORT | |
2062 | if (done_fd >= 0) | |
2063 | close(done_fd); | |
2064 | #endif | |
2065 | zstd_fini(&session->zstd_data); | |
2066 | perf_session__delete(session); | |
2067 | ||
2068 | if (!opts->no_bpf_event) | |
2069 | perf_evlist__stop_sb_thread(rec->sb_evlist); | |
2070 | return status; | |
2071 | } | |
2072 | ||
2073 | static void callchain_debug(struct callchain_param *callchain) | |
2074 | { | |
2075 | static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; | |
2076 | ||
2077 | pr_debug("callchain: type %s\n", str[callchain->record_mode]); | |
2078 | ||
2079 | if (callchain->record_mode == CALLCHAIN_DWARF) | |
2080 | pr_debug("callchain: stack dump size %d\n", | |
2081 | callchain->dump_size); | |
2082 | } | |
2083 | ||
2084 | int record_opts__parse_callchain(struct record_opts *record, | |
2085 | struct callchain_param *callchain, | |
2086 | const char *arg, bool unset) | |
2087 | { | |
2088 | int ret; | |
2089 | callchain->enabled = !unset; | |
2090 | ||
2091 | /* --no-call-graph */ | |
2092 | if (unset) { | |
2093 | callchain->record_mode = CALLCHAIN_NONE; | |
2094 | pr_debug("callchain: disabled\n"); | |
2095 | return 0; | |
2096 | } | |
2097 | ||
2098 | ret = parse_callchain_record_opt(arg, callchain); | |
2099 | if (!ret) { | |
2100 | /* Enable data address sampling for DWARF unwind. */ | |
2101 | if (callchain->record_mode == CALLCHAIN_DWARF) | |
2102 | record->sample_address = true; | |
2103 | callchain_debug(callchain); | |
2104 | } | |
2105 | ||
2106 | return ret; | |
2107 | } | |
2108 | ||
2109 | int record_parse_callchain_opt(const struct option *opt, | |
2110 | const char *arg, | |
2111 | int unset) | |
2112 | { | |
2113 | return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset); | |
2114 | } | |
2115 | ||
2116 | int record_callchain_opt(const struct option *opt, | |
2117 | const char *arg __maybe_unused, | |
2118 | int unset __maybe_unused) | |
2119 | { | |
2120 | struct callchain_param *callchain = opt->value; | |
2121 | ||
2122 | callchain->enabled = true; | |
2123 | ||
2124 | if (callchain->record_mode == CALLCHAIN_NONE) | |
2125 | callchain->record_mode = CALLCHAIN_FP; | |
2126 | ||
2127 | callchain_debug(callchain); | |
2128 | return 0; | |
2129 | } | |
2130 | ||
2131 | static int perf_record_config(const char *var, const char *value, void *cb) | |
2132 | { | |
2133 | struct record *rec = cb; | |
2134 | ||
2135 | if (!strcmp(var, "record.build-id")) { | |
2136 | if (!strcmp(value, "cache")) | |
2137 | rec->no_buildid_cache = false; | |
2138 | else if (!strcmp(value, "no-cache")) | |
2139 | rec->no_buildid_cache = true; | |
2140 | else if (!strcmp(value, "skip")) | |
2141 | rec->no_buildid = true; | |
2142 | else | |
2143 | return -1; | |
2144 | return 0; | |
2145 | } | |
2146 | if (!strcmp(var, "record.call-graph")) { | |
2147 | var = "call-graph.record-mode"; | |
2148 | return perf_default_config(var, value, cb); | |
2149 | } | |
2150 | #ifdef HAVE_AIO_SUPPORT | |
2151 | if (!strcmp(var, "record.aio")) { | |
2152 | rec->opts.nr_cblocks = strtol(value, NULL, 0); | |
2153 | if (!rec->opts.nr_cblocks) | |
2154 | rec->opts.nr_cblocks = nr_cblocks_default; | |
2155 | } | |
2156 | #endif | |
2157 | ||
2158 | return 0; | |
2159 | } | |
2160 | ||
2161 | ||
2162 | static int record__parse_affinity(const struct option *opt, const char *str, int unset) | |
2163 | { | |
2164 | struct record_opts *opts = (struct record_opts *)opt->value; | |
2165 | ||
2166 | if (unset || !str) | |
2167 | return 0; | |
2168 | ||
2169 | if (!strcasecmp(str, "node")) | |
2170 | opts->affinity = PERF_AFFINITY_NODE; | |
2171 | else if (!strcasecmp(str, "cpu")) | |
2172 | opts->affinity = PERF_AFFINITY_CPU; | |
2173 | ||
2174 | return 0; | |
2175 | } | |
2176 | ||
2177 | static int parse_output_max_size(const struct option *opt, | |
2178 | const char *str, int unset) | |
2179 | { | |
2180 | unsigned long *s = (unsigned long *)opt->value; | |
2181 | static struct parse_tag tags_size[] = { | |
2182 | { .tag = 'B', .mult = 1 }, | |
2183 | { .tag = 'K', .mult = 1 << 10 }, | |
2184 | { .tag = 'M', .mult = 1 << 20 }, | |
2185 | { .tag = 'G', .mult = 1 << 30 }, | |
2186 | { .tag = 0 }, | |
2187 | }; | |
2188 | unsigned long val; | |
2189 | ||
2190 | if (unset) { | |
2191 | *s = 0; | |
2192 | return 0; | |
2193 | } | |
2194 | ||
2195 | val = parse_tag_value(str, tags_size); | |
2196 | if (val != (unsigned long) -1) { | |
2197 | *s = val; | |
2198 | return 0; | |
2199 | } | |
2200 | ||
2201 | return -1; | |
2202 | } | |
2203 | ||
2204 | static int record__parse_mmap_pages(const struct option *opt, | |
2205 | const char *str, | |
2206 | int unset __maybe_unused) | |
2207 | { | |
2208 | struct record_opts *opts = opt->value; | |
2209 | char *s, *p; | |
2210 | unsigned int mmap_pages; | |
2211 | int ret; | |
2212 | ||
2213 | if (!str) | |
2214 | return -EINVAL; | |
2215 | ||
2216 | s = strdup(str); | |
2217 | if (!s) | |
2218 | return -ENOMEM; | |
2219 | ||
2220 | p = strchr(s, ','); | |
2221 | if (p) | |
2222 | *p = '\0'; | |
2223 | ||
2224 | if (*s) { | |
2225 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s); | |
2226 | if (ret) | |
2227 | goto out_free; | |
2228 | opts->mmap_pages = mmap_pages; | |
2229 | } | |
2230 | ||
2231 | if (!p) { | |
2232 | ret = 0; | |
2233 | goto out_free; | |
2234 | } | |
2235 | ||
2236 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1); | |
2237 | if (ret) | |
2238 | goto out_free; | |
2239 | ||
2240 | opts->auxtrace_mmap_pages = mmap_pages; | |
2241 | ||
2242 | out_free: | |
2243 | free(s); | |
2244 | return ret; | |
2245 | } | |
2246 | ||
2247 | static int parse_control_option(const struct option *opt, | |
2248 | const char *str, | |
2249 | int unset __maybe_unused) | |
2250 | { | |
2251 | struct record_opts *opts = opt->value; | |
2252 | ||
2253 | return evlist__parse_control(str, &opts->ctl_fd, &opts->ctl_fd_ack, &opts->ctl_fd_close); | |
2254 | } | |
2255 | ||
2256 | static void switch_output_size_warn(struct record *rec) | |
2257 | { | |
2258 | u64 wakeup_size = evlist__mmap_size(rec->opts.mmap_pages); | |
2259 | struct switch_output *s = &rec->switch_output; | |
2260 | ||
2261 | wakeup_size /= 2; | |
2262 | ||
2263 | if (s->size < wakeup_size) { | |
2264 | char buf[100]; | |
2265 | ||
2266 | unit_number__scnprintf(buf, sizeof(buf), wakeup_size); | |
2267 | pr_warning("WARNING: switch-output data size lower than " | |
2268 | "wakeup kernel buffer size (%s) " | |
2269 | "expect bigger perf.data sizes\n", buf); | |
2270 | } | |
2271 | } | |
2272 | ||
2273 | static int switch_output_setup(struct record *rec) | |
2274 | { | |
2275 | struct switch_output *s = &rec->switch_output; | |
2276 | static struct parse_tag tags_size[] = { | |
2277 | { .tag = 'B', .mult = 1 }, | |
2278 | { .tag = 'K', .mult = 1 << 10 }, | |
2279 | { .tag = 'M', .mult = 1 << 20 }, | |
2280 | { .tag = 'G', .mult = 1 << 30 }, | |
2281 | { .tag = 0 }, | |
2282 | }; | |
2283 | static struct parse_tag tags_time[] = { | |
2284 | { .tag = 's', .mult = 1 }, | |
2285 | { .tag = 'm', .mult = 60 }, | |
2286 | { .tag = 'h', .mult = 60*60 }, | |
2287 | { .tag = 'd', .mult = 60*60*24 }, | |
2288 | { .tag = 0 }, | |
2289 | }; | |
2290 | unsigned long val; | |
2291 | ||
2292 | /* | |
2293 | * If we're using --switch-output-events, then we imply its | |
2294 | * --switch-output=signal, as we'll send a SIGUSR2 from the side band | |
2295 | * thread to its parent. | |
2296 | */ | |
2297 | if (rec->switch_output_event_set) | |
2298 | goto do_signal; | |
2299 | ||
2300 | if (!s->set) | |
2301 | return 0; | |
2302 | ||
2303 | if (!strcmp(s->str, "signal")) { | |
2304 | do_signal: | |
2305 | s->signal = true; | |
2306 | pr_debug("switch-output with SIGUSR2 signal\n"); | |
2307 | goto enabled; | |
2308 | } | |
2309 | ||
2310 | val = parse_tag_value(s->str, tags_size); | |
2311 | if (val != (unsigned long) -1) { | |
2312 | s->size = val; | |
2313 | pr_debug("switch-output with %s size threshold\n", s->str); | |
2314 | goto enabled; | |
2315 | } | |
2316 | ||
2317 | val = parse_tag_value(s->str, tags_time); | |
2318 | if (val != (unsigned long) -1) { | |
2319 | s->time = val; | |
2320 | pr_debug("switch-output with %s time threshold (%lu seconds)\n", | |
2321 | s->str, s->time); | |
2322 | goto enabled; | |
2323 | } | |
2324 | ||
2325 | return -1; | |
2326 | ||
2327 | enabled: | |
2328 | rec->timestamp_filename = true; | |
2329 | s->enabled = true; | |
2330 | ||
2331 | if (s->size && !rec->opts.no_buffering) | |
2332 | switch_output_size_warn(rec); | |
2333 | ||
2334 | return 0; | |
2335 | } | |
2336 | ||
2337 | static const char * const __record_usage[] = { | |
2338 | "perf record [<options>] [<command>]", | |
2339 | "perf record [<options>] -- <command> [<options>]", | |
2340 | NULL | |
2341 | }; | |
2342 | const char * const *record_usage = __record_usage; | |
2343 | ||
2344 | static int build_id__process_mmap(struct perf_tool *tool, union perf_event *event, | |
2345 | struct perf_sample *sample, struct machine *machine) | |
2346 | { | |
2347 | /* | |
2348 | * We already have the kernel maps, put in place via perf_session__create_kernel_maps() | |
2349 | * no need to add them twice. | |
2350 | */ | |
2351 | if (!(event->header.misc & PERF_RECORD_MISC_USER)) | |
2352 | return 0; | |
2353 | return perf_event__process_mmap(tool, event, sample, machine); | |
2354 | } | |
2355 | ||
2356 | static int build_id__process_mmap2(struct perf_tool *tool, union perf_event *event, | |
2357 | struct perf_sample *sample, struct machine *machine) | |
2358 | { | |
2359 | /* | |
2360 | * We already have the kernel maps, put in place via perf_session__create_kernel_maps() | |
2361 | * no need to add them twice. | |
2362 | */ | |
2363 | if (!(event->header.misc & PERF_RECORD_MISC_USER)) | |
2364 | return 0; | |
2365 | ||
2366 | return perf_event__process_mmap2(tool, event, sample, machine); | |
2367 | } | |
2368 | ||
2369 | /* | |
2370 | * XXX Ideally would be local to cmd_record() and passed to a record__new | |
2371 | * because we need to have access to it in record__exit, that is called | |
2372 | * after cmd_record() exits, but since record_options need to be accessible to | |
2373 | * builtin-script, leave it here. | |
2374 | * | |
2375 | * At least we don't ouch it in all the other functions here directly. | |
2376 | * | |
2377 | * Just say no to tons of global variables, sigh. | |
2378 | */ | |
2379 | static struct record record = { | |
2380 | .opts = { | |
2381 | .sample_time = true, | |
2382 | .mmap_pages = UINT_MAX, | |
2383 | .user_freq = UINT_MAX, | |
2384 | .user_interval = ULLONG_MAX, | |
2385 | .freq = 4000, | |
2386 | .target = { | |
2387 | .uses_mmap = true, | |
2388 | .default_per_cpu = true, | |
2389 | }, | |
2390 | .mmap_flush = MMAP_FLUSH_DEFAULT, | |
2391 | .nr_threads_synthesize = 1, | |
2392 | .ctl_fd = -1, | |
2393 | .ctl_fd_ack = -1, | |
2394 | }, | |
2395 | .tool = { | |
2396 | .sample = process_sample_event, | |
2397 | .fork = perf_event__process_fork, | |
2398 | .exit = perf_event__process_exit, | |
2399 | .comm = perf_event__process_comm, | |
2400 | .namespaces = perf_event__process_namespaces, | |
2401 | .mmap = build_id__process_mmap, | |
2402 | .mmap2 = build_id__process_mmap2, | |
2403 | .ordered_events = true, | |
2404 | }, | |
2405 | }; | |
2406 | ||
2407 | const char record_callchain_help[] = CALLCHAIN_RECORD_HELP | |
2408 | "\n\t\t\t\tDefault: fp"; | |
2409 | ||
2410 | static bool dry_run; | |
2411 | ||
2412 | /* | |
2413 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
2414 | * with it and switch to use the library functions in perf_evlist that came | |
2415 | * from builtin-record.c, i.e. use record_opts, | |
2416 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', | |
2417 | * using pipes, etc. | |
2418 | */ | |
2419 | static struct option __record_options[] = { | |
2420 | OPT_CALLBACK('e', "event", &record.evlist, "event", | |
2421 | "event selector. use 'perf list' to list available events", | |
2422 | parse_events_option), | |
2423 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", | |
2424 | "event filter", parse_filter), | |
2425 | OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist, | |
2426 | NULL, "don't record events from perf itself", | |
2427 | exclude_perf), | |
2428 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", | |
2429 | "record events on existing process id"), | |
2430 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", | |
2431 | "record events on existing thread id"), | |
2432 | OPT_INTEGER('r', "realtime", &record.realtime_prio, | |
2433 | "collect data with this RT SCHED_FIFO priority"), | |
2434 | OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering, | |
2435 | "collect data without buffering"), | |
2436 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, | |
2437 | "collect raw sample records from all opened counters"), | |
2438 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, | |
2439 | "system-wide collection from all CPUs"), | |
2440 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", | |
2441 | "list of cpus to monitor"), | |
2442 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), | |
2443 | OPT_STRING('o', "output", &record.data.path, "file", | |
2444 | "output file name"), | |
2445 | OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit, | |
2446 | &record.opts.no_inherit_set, | |
2447 | "child tasks do not inherit counters"), | |
2448 | OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize, | |
2449 | "synthesize non-sample events at the end of output"), | |
2450 | OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"), | |
2451 | OPT_BOOLEAN(0, "no-bpf-event", &record.opts.no_bpf_event, "do not record bpf events"), | |
2452 | OPT_BOOLEAN(0, "strict-freq", &record.opts.strict_freq, | |
2453 | "Fail if the specified frequency can't be used"), | |
2454 | OPT_CALLBACK('F', "freq", &record.opts, "freq or 'max'", | |
2455 | "profile at this frequency", | |
2456 | record__parse_freq), | |
2457 | OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]", | |
2458 | "number of mmap data pages and AUX area tracing mmap pages", | |
2459 | record__parse_mmap_pages), | |
2460 | OPT_CALLBACK(0, "mmap-flush", &record.opts, "number", | |
2461 | "Minimal number of bytes that is extracted from mmap data pages (default: 1)", | |
2462 | record__mmap_flush_parse), | |
2463 | OPT_BOOLEAN(0, "group", &record.opts.group, | |
2464 | "put the counters into a counter group"), | |
2465 | OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, | |
2466 | NULL, "enables call-graph recording" , | |
2467 | &record_callchain_opt), | |
2468 | OPT_CALLBACK(0, "call-graph", &record.opts, | |
2469 | "record_mode[,record_size]", record_callchain_help, | |
2470 | &record_parse_callchain_opt), | |
2471 | OPT_INCR('v', "verbose", &verbose, | |
2472 | "be more verbose (show counter open errors, etc)"), | |
2473 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), | |
2474 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, | |
2475 | "per thread counts"), | |
2476 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"), | |
2477 | OPT_BOOLEAN(0, "phys-data", &record.opts.sample_phys_addr, | |
2478 | "Record the sample physical addresses"), | |
2479 | OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"), | |
2480 | OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time, | |
2481 | &record.opts.sample_time_set, | |
2482 | "Record the sample timestamps"), | |
2483 | OPT_BOOLEAN_SET('P', "period", &record.opts.period, &record.opts.period_set, | |
2484 | "Record the sample period"), | |
2485 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, | |
2486 | "don't sample"), | |
2487 | OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache, | |
2488 | &record.no_buildid_cache_set, | |
2489 | "do not update the buildid cache"), | |
2490 | OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid, | |
2491 | &record.no_buildid_set, | |
2492 | "do not collect buildids in perf.data"), | |
2493 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", | |
2494 | "monitor event in cgroup name only", | |
2495 | parse_cgroups), | |
2496 | OPT_INTEGER('D', "delay", &record.opts.initial_delay, | |
2497 | "ms to wait before starting measurement after program start (-1: start with events disabled)"), | |
2498 | OPT_BOOLEAN(0, "kcore", &record.opts.kcore, "copy /proc/kcore"), | |
2499 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", | |
2500 | "user to profile"), | |
2501 | ||
2502 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, | |
2503 | "branch any", "sample any taken branches", | |
2504 | parse_branch_stack), | |
2505 | ||
2506 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, | |
2507 | "branch filter mask", "branch stack filter modes", | |
2508 | parse_branch_stack), | |
2509 | OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, | |
2510 | "sample by weight (on special events only)"), | |
2511 | OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction, | |
2512 | "sample transaction flags (special events only)"), | |
2513 | OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, | |
2514 | "use per-thread mmaps"), | |
2515 | OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register", | |
2516 | "sample selected machine registers on interrupt," | |
2517 | " use '-I?' to list register names", parse_intr_regs), | |
2518 | OPT_CALLBACK_OPTARG(0, "user-regs", &record.opts.sample_user_regs, NULL, "any register", | |
2519 | "sample selected machine registers on interrupt," | |
2520 | " use '--user-regs=?' to list register names", parse_user_regs), | |
2521 | OPT_BOOLEAN(0, "running-time", &record.opts.running_time, | |
2522 | "Record running/enabled time of read (:S) events"), | |
2523 | OPT_CALLBACK('k', "clockid", &record.opts, | |
2524 | "clockid", "clockid to use for events, see clock_gettime()", | |
2525 | parse_clockid), | |
2526 | OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts, | |
2527 | "opts", "AUX area tracing Snapshot Mode", ""), | |
2528 | OPT_STRING_OPTARG(0, "aux-sample", &record.opts.auxtrace_sample_opts, | |
2529 | "opts", "sample AUX area", ""), | |
2530 | OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, | |
2531 | "per thread proc mmap processing timeout in ms"), | |
2532 | OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces, | |
2533 | "Record namespaces events"), | |
2534 | OPT_BOOLEAN(0, "all-cgroups", &record.opts.record_cgroup, | |
2535 | "Record cgroup events"), | |
2536 | OPT_BOOLEAN_SET(0, "switch-events", &record.opts.record_switch_events, | |
2537 | &record.opts.record_switch_events_set, | |
2538 | "Record context switch events"), | |
2539 | OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel, | |
2540 | "Configure all used events to run in kernel space.", | |
2541 | PARSE_OPT_EXCLUSIVE), | |
2542 | OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user, | |
2543 | "Configure all used events to run in user space.", | |
2544 | PARSE_OPT_EXCLUSIVE), | |
2545 | OPT_BOOLEAN(0, "kernel-callchains", &record.opts.kernel_callchains, | |
2546 | "collect kernel callchains"), | |
2547 | OPT_BOOLEAN(0, "user-callchains", &record.opts.user_callchains, | |
2548 | "collect user callchains"), | |
2549 | OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path", | |
2550 | "clang binary to use for compiling BPF scriptlets"), | |
2551 | OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options", | |
2552 | "options passed to clang when compiling BPF scriptlets"), | |
2553 | OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name, | |
2554 | "file", "vmlinux pathname"), | |
2555 | OPT_BOOLEAN(0, "buildid-all", &record.buildid_all, | |
2556 | "Record build-id of all DSOs regardless of hits"), | |
2557 | OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, | |
2558 | "append timestamp to output filename"), | |
2559 | OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary, | |
2560 | "Record timestamp boundary (time of first/last samples)"), | |
2561 | OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str, | |
2562 | &record.switch_output.set, "signal or size[BKMG] or time[smhd]", | |
2563 | "Switch output when receiving SIGUSR2 (signal) or cross a size or time threshold", | |
2564 | "signal"), | |
2565 | OPT_CALLBACK_SET(0, "switch-output-event", &record.sb_evlist, &record.switch_output_event_set, "switch output event", | |
2566 | "switch output event selector. use 'perf list' to list available events", | |
2567 | parse_events_option_new_evlist), | |
2568 | OPT_INTEGER(0, "switch-max-files", &record.switch_output.num_files, | |
2569 | "Limit number of switch output generated files"), | |
2570 | OPT_BOOLEAN(0, "dry-run", &dry_run, | |
2571 | "Parse options then exit"), | |
2572 | #ifdef HAVE_AIO_SUPPORT | |
2573 | OPT_CALLBACK_OPTARG(0, "aio", &record.opts, | |
2574 | &nr_cblocks_default, "n", "Use <n> control blocks in asynchronous trace writing mode (default: 1, max: 4)", | |
2575 | record__aio_parse), | |
2576 | #endif | |
2577 | OPT_CALLBACK(0, "affinity", &record.opts, "node|cpu", | |
2578 | "Set affinity mask of trace reading thread to NUMA node cpu mask or cpu of processed mmap buffer", | |
2579 | record__parse_affinity), | |
2580 | #ifdef HAVE_ZSTD_SUPPORT | |
2581 | OPT_CALLBACK_OPTARG('z', "compression-level", &record.opts, &comp_level_default, | |
2582 | "n", "Compressed records using specified level (default: 1 - fastest compression, 22 - greatest compression)", | |
2583 | record__parse_comp_level), | |
2584 | #endif | |
2585 | OPT_CALLBACK(0, "max-size", &record.output_max_size, | |
2586 | "size", "Limit the maximum size of the output file", parse_output_max_size), | |
2587 | OPT_UINTEGER(0, "num-thread-synthesize", | |
2588 | &record.opts.nr_threads_synthesize, | |
2589 | "number of threads to run for event synthesis"), | |
2590 | #ifdef HAVE_LIBPFM | |
2591 | OPT_CALLBACK(0, "pfm-events", &record.evlist, "event", | |
2592 | "libpfm4 event selector. use 'perf list' to list available events", | |
2593 | parse_libpfm_events_option), | |
2594 | #endif | |
2595 | OPT_CALLBACK(0, "control", &record.opts, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]", | |
2596 | "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events,\n" | |
2597 | "\t\t\t 'snapshot': AUX area tracing snapshot).\n" | |
2598 | "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n" | |
2599 | "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.", | |
2600 | parse_control_option), | |
2601 | OPT_END() | |
2602 | }; | |
2603 | ||
2604 | struct option *record_options = __record_options; | |
2605 | ||
2606 | int cmd_record(int argc, const char **argv) | |
2607 | { | |
2608 | int err; | |
2609 | struct record *rec = &record; | |
2610 | char errbuf[BUFSIZ]; | |
2611 | ||
2612 | setlocale(LC_ALL, ""); | |
2613 | ||
2614 | #ifndef HAVE_LIBBPF_SUPPORT | |
2615 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c) | |
2616 | set_nobuild('\0', "clang-path", true); | |
2617 | set_nobuild('\0', "clang-opt", true); | |
2618 | # undef set_nobuild | |
2619 | #endif | |
2620 | ||
2621 | #ifndef HAVE_BPF_PROLOGUE | |
2622 | # if !defined (HAVE_DWARF_SUPPORT) | |
2623 | # define REASON "NO_DWARF=1" | |
2624 | # elif !defined (HAVE_LIBBPF_SUPPORT) | |
2625 | # define REASON "NO_LIBBPF=1" | |
2626 | # else | |
2627 | # define REASON "this architecture doesn't support BPF prologue" | |
2628 | # endif | |
2629 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c) | |
2630 | set_nobuild('\0', "vmlinux", true); | |
2631 | # undef set_nobuild | |
2632 | # undef REASON | |
2633 | #endif | |
2634 | ||
2635 | rec->opts.affinity = PERF_AFFINITY_SYS; | |
2636 | ||
2637 | rec->evlist = evlist__new(); | |
2638 | if (rec->evlist == NULL) | |
2639 | return -ENOMEM; | |
2640 | ||
2641 | err = perf_config(perf_record_config, rec); | |
2642 | if (err) | |
2643 | return err; | |
2644 | ||
2645 | argc = parse_options(argc, argv, record_options, record_usage, | |
2646 | PARSE_OPT_STOP_AT_NON_OPTION); | |
2647 | if (quiet) | |
2648 | perf_quiet_option(); | |
2649 | ||
2650 | /* Make system wide (-a) the default target. */ | |
2651 | if (!argc && target__none(&rec->opts.target)) | |
2652 | rec->opts.target.system_wide = true; | |
2653 | ||
2654 | if (nr_cgroups && !rec->opts.target.system_wide) { | |
2655 | usage_with_options_msg(record_usage, record_options, | |
2656 | "cgroup monitoring only available in system-wide mode"); | |
2657 | ||
2658 | } | |
2659 | ||
2660 | if (rec->opts.kcore) | |
2661 | rec->data.is_dir = true; | |
2662 | ||
2663 | if (rec->opts.comp_level != 0) { | |
2664 | pr_debug("Compression enabled, disabling build id collection at the end of the session.\n"); | |
2665 | rec->no_buildid = true; | |
2666 | } | |
2667 | ||
2668 | if (rec->opts.record_switch_events && | |
2669 | !perf_can_record_switch_events()) { | |
2670 | ui__error("kernel does not support recording context switch events\n"); | |
2671 | parse_options_usage(record_usage, record_options, "switch-events", 0); | |
2672 | err = -EINVAL; | |
2673 | goto out_opts; | |
2674 | } | |
2675 | ||
2676 | if (switch_output_setup(rec)) { | |
2677 | parse_options_usage(record_usage, record_options, "switch-output", 0); | |
2678 | err = -EINVAL; | |
2679 | goto out_opts; | |
2680 | } | |
2681 | ||
2682 | if (rec->switch_output.time) { | |
2683 | signal(SIGALRM, alarm_sig_handler); | |
2684 | alarm(rec->switch_output.time); | |
2685 | } | |
2686 | ||
2687 | if (rec->switch_output.num_files) { | |
2688 | rec->switch_output.filenames = calloc(sizeof(char *), | |
2689 | rec->switch_output.num_files); | |
2690 | if (!rec->switch_output.filenames) { | |
2691 | err = -EINVAL; | |
2692 | goto out_opts; | |
2693 | } | |
2694 | } | |
2695 | ||
2696 | /* | |
2697 | * Allow aliases to facilitate the lookup of symbols for address | |
2698 | * filters. Refer to auxtrace_parse_filters(). | |
2699 | */ | |
2700 | symbol_conf.allow_aliases = true; | |
2701 | ||
2702 | symbol__init(NULL); | |
2703 | ||
2704 | if (rec->opts.affinity != PERF_AFFINITY_SYS) { | |
2705 | rec->affinity_mask.nbits = cpu__max_cpu(); | |
2706 | rec->affinity_mask.bits = bitmap_alloc(rec->affinity_mask.nbits); | |
2707 | if (!rec->affinity_mask.bits) { | |
2708 | pr_err("Failed to allocate thread mask for %zd cpus\n", rec->affinity_mask.nbits); | |
2709 | err = -ENOMEM; | |
2710 | goto out_opts; | |
2711 | } | |
2712 | pr_debug2("thread mask[%zd]: empty\n", rec->affinity_mask.nbits); | |
2713 | } | |
2714 | ||
2715 | err = record__auxtrace_init(rec); | |
2716 | if (err) | |
2717 | goto out; | |
2718 | ||
2719 | if (dry_run) | |
2720 | goto out; | |
2721 | ||
2722 | err = bpf__setup_stdout(rec->evlist); | |
2723 | if (err) { | |
2724 | bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf)); | |
2725 | pr_err("ERROR: Setup BPF stdout failed: %s\n", | |
2726 | errbuf); | |
2727 | goto out; | |
2728 | } | |
2729 | ||
2730 | err = -ENOMEM; | |
2731 | ||
2732 | if (rec->no_buildid_cache || rec->no_buildid) { | |
2733 | disable_buildid_cache(); | |
2734 | } else if (rec->switch_output.enabled) { | |
2735 | /* | |
2736 | * In 'perf record --switch-output', disable buildid | |
2737 | * generation by default to reduce data file switching | |
2738 | * overhead. Still generate buildid if they are required | |
2739 | * explicitly using | |
2740 | * | |
2741 | * perf record --switch-output --no-no-buildid \ | |
2742 | * --no-no-buildid-cache | |
2743 | * | |
2744 | * Following code equals to: | |
2745 | * | |
2746 | * if ((rec->no_buildid || !rec->no_buildid_set) && | |
2747 | * (rec->no_buildid_cache || !rec->no_buildid_cache_set)) | |
2748 | * disable_buildid_cache(); | |
2749 | */ | |
2750 | bool disable = true; | |
2751 | ||
2752 | if (rec->no_buildid_set && !rec->no_buildid) | |
2753 | disable = false; | |
2754 | if (rec->no_buildid_cache_set && !rec->no_buildid_cache) | |
2755 | disable = false; | |
2756 | if (disable) { | |
2757 | rec->no_buildid = true; | |
2758 | rec->no_buildid_cache = true; | |
2759 | disable_buildid_cache(); | |
2760 | } | |
2761 | } | |
2762 | ||
2763 | if (record.opts.overwrite) | |
2764 | record.opts.tail_synthesize = true; | |
2765 | ||
2766 | if (rec->evlist->core.nr_entries == 0 && | |
2767 | __evlist__add_default(rec->evlist, !record.opts.no_samples) < 0) { | |
2768 | pr_err("Not enough memory for event selector list\n"); | |
2769 | goto out; | |
2770 | } | |
2771 | ||
2772 | if (rec->opts.target.tid && !rec->opts.no_inherit_set) | |
2773 | rec->opts.no_inherit = true; | |
2774 | ||
2775 | err = target__validate(&rec->opts.target); | |
2776 | if (err) { | |
2777 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); | |
2778 | ui__warning("%s\n", errbuf); | |
2779 | } | |
2780 | ||
2781 | err = target__parse_uid(&rec->opts.target); | |
2782 | if (err) { | |
2783 | int saved_errno = errno; | |
2784 | ||
2785 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); | |
2786 | ui__error("%s", errbuf); | |
2787 | ||
2788 | err = -saved_errno; | |
2789 | goto out; | |
2790 | } | |
2791 | ||
2792 | /* Enable ignoring missing threads when -u/-p option is defined. */ | |
2793 | rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX || rec->opts.target.pid; | |
2794 | ||
2795 | err = -ENOMEM; | |
2796 | if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0) | |
2797 | usage_with_options(record_usage, record_options); | |
2798 | ||
2799 | err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts); | |
2800 | if (err) | |
2801 | goto out; | |
2802 | ||
2803 | /* | |
2804 | * We take all buildids when the file contains | |
2805 | * AUX area tracing data because we do not decode the | |
2806 | * trace because it would take too long. | |
2807 | */ | |
2808 | if (rec->opts.full_auxtrace) | |
2809 | rec->buildid_all = true; | |
2810 | ||
2811 | if (rec->opts.text_poke) { | |
2812 | err = record__config_text_poke(rec->evlist); | |
2813 | if (err) { | |
2814 | pr_err("record__config_text_poke failed, error %d\n", err); | |
2815 | goto out; | |
2816 | } | |
2817 | } | |
2818 | ||
2819 | if (record_opts__config(&rec->opts)) { | |
2820 | err = -EINVAL; | |
2821 | goto out; | |
2822 | } | |
2823 | ||
2824 | if (rec->opts.nr_cblocks > nr_cblocks_max) | |
2825 | rec->opts.nr_cblocks = nr_cblocks_max; | |
2826 | pr_debug("nr_cblocks: %d\n", rec->opts.nr_cblocks); | |
2827 | ||
2828 | pr_debug("affinity: %s\n", affinity_tags[rec->opts.affinity]); | |
2829 | pr_debug("mmap flush: %d\n", rec->opts.mmap_flush); | |
2830 | ||
2831 | if (rec->opts.comp_level > comp_level_max) | |
2832 | rec->opts.comp_level = comp_level_max; | |
2833 | pr_debug("comp level: %d\n", rec->opts.comp_level); | |
2834 | ||
2835 | err = __cmd_record(&record, argc, argv); | |
2836 | out: | |
2837 | bitmap_free(rec->affinity_mask.bits); | |
2838 | evlist__delete(rec->evlist); | |
2839 | symbol__exit(); | |
2840 | auxtrace_record__free(rec->itr); | |
2841 | out_opts: | |
2842 | evlist__close_control(rec->opts.ctl_fd, rec->opts.ctl_fd_ack, &rec->opts.ctl_fd_close); | |
2843 | return err; | |
2844 | } | |
2845 | ||
2846 | static void snapshot_sig_handler(int sig __maybe_unused) | |
2847 | { | |
2848 | struct record *rec = &record; | |
2849 | ||
2850 | hit_auxtrace_snapshot_trigger(rec); | |
2851 | ||
2852 | if (switch_output_signal(rec)) | |
2853 | trigger_hit(&switch_output_trigger); | |
2854 | } | |
2855 | ||
2856 | static void alarm_sig_handler(int sig __maybe_unused) | |
2857 | { | |
2858 | struct record *rec = &record; | |
2859 | ||
2860 | if (switch_output_time(rec)) | |
2861 | trigger_hit(&switch_output_trigger); | |
2862 | } |