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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
abaff32a | 2 | /* |
bf9e1876 IM |
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. | |
abaff32a | 8 | */ |
16f762a2 | 9 | #include "builtin.h" |
bf9e1876 IM |
10 | |
11 | #include "perf.h" | |
12 | ||
6122e4e4 | 13 | #include "util/build-id.h" |
6eda5838 | 14 | #include "util/util.h" |
4b6ab94e | 15 | #include <subcmd/parse-options.h> |
8ad8db37 | 16 | #include "util/parse-events.h" |
41840d21 | 17 | #include "util/config.h" |
6eda5838 | 18 | |
8f651eae | 19 | #include "util/callchain.h" |
f14d5707 | 20 | #include "util/cgroup.h" |
7c6a1c65 | 21 | #include "util/header.h" |
66e274f3 | 22 | #include "util/event.h" |
361c99a6 | 23 | #include "util/evlist.h" |
69aad6f1 | 24 | #include "util/evsel.h" |
8f28827a | 25 | #include "util/debug.h" |
94c744b6 | 26 | #include "util/session.h" |
45694aa7 | 27 | #include "util/tool.h" |
8d06367f | 28 | #include "util/symbol.h" |
a12b51c4 | 29 | #include "util/cpumap.h" |
fd78260b | 30 | #include "util/thread_map.h" |
f5fc1412 | 31 | #include "util/data.h" |
bcc84ec6 | 32 | #include "util/perf_regs.h" |
ef149c25 | 33 | #include "util/auxtrace.h" |
46bc29b9 | 34 | #include "util/tsc.h" |
f00898f4 | 35 | #include "util/parse-branch-options.h" |
bcc84ec6 | 36 | #include "util/parse-regs-options.h" |
71dc2326 | 37 | #include "util/llvm-utils.h" |
8690a2a7 | 38 | #include "util/bpf-loader.h" |
5f9cf599 | 39 | #include "util/trigger.h" |
a074865e | 40 | #include "util/perf-hooks.h" |
f13de660 | 41 | #include "util/cpu-set-sched.h" |
c5e4027e | 42 | #include "util/time-utils.h" |
58db1d6e | 43 | #include "util/units.h" |
7b612e29 | 44 | #include "util/bpf-event.h" |
d8871ea7 | 45 | #include "asm/bug.h" |
7c6a1c65 | 46 | |
a43783ae | 47 | #include <errno.h> |
fd20e811 | 48 | #include <inttypes.h> |
67230479 | 49 | #include <locale.h> |
4208735d | 50 | #include <poll.h> |
97124d5e | 51 | #include <unistd.h> |
de9ac07b | 52 | #include <sched.h> |
9607ad3a | 53 | #include <signal.h> |
a41794cd | 54 | #include <sys/mman.h> |
4208735d | 55 | #include <sys/wait.h> |
0693e680 | 56 | #include <linux/time64.h> |
78da39fa | 57 | |
1b43b704 | 58 | struct switch_output { |
dc0c6127 | 59 | bool enabled; |
1b43b704 | 60 | bool signal; |
dc0c6127 | 61 | unsigned long size; |
bfacbe3b | 62 | unsigned long time; |
cb4e1ebb JO |
63 | const char *str; |
64 | bool set; | |
03724b2e AK |
65 | char **filenames; |
66 | int num_files; | |
67 | int cur_file; | |
1b43b704 JO |
68 | }; |
69 | ||
8c6f45a7 | 70 | struct record { |
45694aa7 | 71 | struct perf_tool tool; |
b4006796 | 72 | struct record_opts opts; |
d20deb64 | 73 | u64 bytes_written; |
8ceb41d7 | 74 | struct perf_data data; |
ef149c25 | 75 | struct auxtrace_record *itr; |
d20deb64 ACM |
76 | struct perf_evlist *evlist; |
77 | struct perf_session *session; | |
d20deb64 | 78 | int realtime_prio; |
d20deb64 | 79 | bool no_buildid; |
d2db9a98 | 80 | bool no_buildid_set; |
d20deb64 | 81 | bool no_buildid_cache; |
d2db9a98 | 82 | bool no_buildid_cache_set; |
6156681b | 83 | bool buildid_all; |
ecfd7a9c | 84 | bool timestamp_filename; |
68588baf | 85 | bool timestamp_boundary; |
1b43b704 | 86 | struct switch_output switch_output; |
9f065194 | 87 | unsigned long long samples; |
9d2ed645 | 88 | cpu_set_t affinity_mask; |
0f82ebc4 | 89 | }; |
a21ca2ca | 90 | |
dc0c6127 JO |
91 | static volatile int auxtrace_record__snapshot_started; |
92 | static DEFINE_TRIGGER(auxtrace_snapshot_trigger); | |
93 | static DEFINE_TRIGGER(switch_output_trigger); | |
94 | ||
9d2ed645 AB |
95 | static const char *affinity_tags[PERF_AFFINITY_MAX] = { |
96 | "SYS", "NODE", "CPU" | |
97 | }; | |
98 | ||
dc0c6127 JO |
99 | static bool switch_output_signal(struct record *rec) |
100 | { | |
101 | return rec->switch_output.signal && | |
102 | trigger_is_ready(&switch_output_trigger); | |
103 | } | |
104 | ||
105 | static bool switch_output_size(struct record *rec) | |
106 | { | |
107 | return rec->switch_output.size && | |
108 | trigger_is_ready(&switch_output_trigger) && | |
109 | (rec->bytes_written >= rec->switch_output.size); | |
110 | } | |
111 | ||
bfacbe3b JO |
112 | static bool switch_output_time(struct record *rec) |
113 | { | |
114 | return rec->switch_output.time && | |
115 | trigger_is_ready(&switch_output_trigger); | |
116 | } | |
117 | ||
ded2b8fe JO |
118 | static int record__write(struct record *rec, struct perf_mmap *map __maybe_unused, |
119 | void *bf, size_t size) | |
f5970550 | 120 | { |
ded2b8fe JO |
121 | struct perf_data_file *file = &rec->session->data->file; |
122 | ||
123 | if (perf_data_file__write(file, bf, size) < 0) { | |
50a9b868 JO |
124 | pr_err("failed to write perf data, error: %m\n"); |
125 | return -1; | |
f5970550 | 126 | } |
8d3eca20 | 127 | |
cf8b2e69 | 128 | rec->bytes_written += size; |
dc0c6127 JO |
129 | |
130 | if (switch_output_size(rec)) | |
131 | trigger_hit(&switch_output_trigger); | |
132 | ||
8d3eca20 | 133 | return 0; |
f5970550 PZ |
134 | } |
135 | ||
d3d1af6f AB |
136 | #ifdef HAVE_AIO_SUPPORT |
137 | static int record__aio_write(struct aiocb *cblock, int trace_fd, | |
138 | void *buf, size_t size, off_t off) | |
139 | { | |
140 | int rc; | |
141 | ||
142 | cblock->aio_fildes = trace_fd; | |
143 | cblock->aio_buf = buf; | |
144 | cblock->aio_nbytes = size; | |
145 | cblock->aio_offset = off; | |
146 | cblock->aio_sigevent.sigev_notify = SIGEV_NONE; | |
147 | ||
148 | do { | |
149 | rc = aio_write(cblock); | |
150 | if (rc == 0) { | |
151 | break; | |
152 | } else if (errno != EAGAIN) { | |
153 | cblock->aio_fildes = -1; | |
154 | pr_err("failed to queue perf data, error: %m\n"); | |
155 | break; | |
156 | } | |
157 | } while (1); | |
158 | ||
159 | return rc; | |
160 | } | |
161 | ||
162 | static int record__aio_complete(struct perf_mmap *md, struct aiocb *cblock) | |
163 | { | |
164 | void *rem_buf; | |
165 | off_t rem_off; | |
166 | size_t rem_size; | |
167 | int rc, aio_errno; | |
168 | ssize_t aio_ret, written; | |
169 | ||
170 | aio_errno = aio_error(cblock); | |
171 | if (aio_errno == EINPROGRESS) | |
172 | return 0; | |
173 | ||
174 | written = aio_ret = aio_return(cblock); | |
175 | if (aio_ret < 0) { | |
176 | if (aio_errno != EINTR) | |
177 | pr_err("failed to write perf data, error: %m\n"); | |
178 | written = 0; | |
179 | } | |
180 | ||
181 | rem_size = cblock->aio_nbytes - written; | |
182 | ||
183 | if (rem_size == 0) { | |
184 | cblock->aio_fildes = -1; | |
185 | /* | |
186 | * md->refcount is incremented in perf_mmap__push() for | |
187 | * every enqueued aio write request so decrement it because | |
188 | * the request is now complete. | |
189 | */ | |
190 | perf_mmap__put(md); | |
191 | rc = 1; | |
192 | } else { | |
193 | /* | |
194 | * aio write request may require restart with the | |
195 | * reminder if the kernel didn't write whole | |
196 | * chunk at once. | |
197 | */ | |
198 | rem_off = cblock->aio_offset + written; | |
199 | rem_buf = (void *)(cblock->aio_buf + written); | |
200 | record__aio_write(cblock, cblock->aio_fildes, | |
201 | rem_buf, rem_size, rem_off); | |
202 | rc = 0; | |
203 | } | |
204 | ||
205 | return rc; | |
206 | } | |
207 | ||
93f20c0f | 208 | static int record__aio_sync(struct perf_mmap *md, bool sync_all) |
d3d1af6f | 209 | { |
93f20c0f AB |
210 | struct aiocb **aiocb = md->aio.aiocb; |
211 | struct aiocb *cblocks = md->aio.cblocks; | |
d3d1af6f | 212 | struct timespec timeout = { 0, 1000 * 1000 * 1 }; /* 1ms */ |
93f20c0f | 213 | int i, do_suspend; |
d3d1af6f AB |
214 | |
215 | do { | |
93f20c0f AB |
216 | do_suspend = 0; |
217 | for (i = 0; i < md->aio.nr_cblocks; ++i) { | |
218 | if (cblocks[i].aio_fildes == -1 || record__aio_complete(md, &cblocks[i])) { | |
219 | if (sync_all) | |
220 | aiocb[i] = NULL; | |
221 | else | |
222 | return i; | |
223 | } else { | |
224 | /* | |
225 | * Started aio write is not complete yet | |
226 | * so it has to be waited before the | |
227 | * next allocation. | |
228 | */ | |
229 | aiocb[i] = &cblocks[i]; | |
230 | do_suspend = 1; | |
231 | } | |
232 | } | |
233 | if (!do_suspend) | |
234 | return -1; | |
d3d1af6f | 235 | |
93f20c0f | 236 | while (aio_suspend((const struct aiocb **)aiocb, md->aio.nr_cblocks, &timeout)) { |
d3d1af6f AB |
237 | if (!(errno == EAGAIN || errno == EINTR)) |
238 | pr_err("failed to sync perf data, error: %m\n"); | |
239 | } | |
240 | } while (1); | |
241 | } | |
242 | ||
243 | static int record__aio_pushfn(void *to, struct aiocb *cblock, void *bf, size_t size, off_t off) | |
244 | { | |
245 | struct record *rec = to; | |
246 | int ret, trace_fd = rec->session->data->file.fd; | |
247 | ||
248 | rec->samples++; | |
249 | ||
250 | ret = record__aio_write(cblock, trace_fd, bf, size, off); | |
251 | if (!ret) { | |
252 | rec->bytes_written += size; | |
253 | if (switch_output_size(rec)) | |
254 | trigger_hit(&switch_output_trigger); | |
255 | } | |
256 | ||
257 | return ret; | |
258 | } | |
259 | ||
260 | static off_t record__aio_get_pos(int trace_fd) | |
261 | { | |
262 | return lseek(trace_fd, 0, SEEK_CUR); | |
263 | } | |
264 | ||
265 | static void record__aio_set_pos(int trace_fd, off_t pos) | |
266 | { | |
267 | lseek(trace_fd, pos, SEEK_SET); | |
268 | } | |
269 | ||
270 | static void record__aio_mmap_read_sync(struct record *rec) | |
271 | { | |
272 | int i; | |
273 | struct perf_evlist *evlist = rec->evlist; | |
274 | struct perf_mmap *maps = evlist->mmap; | |
275 | ||
276 | if (!rec->opts.nr_cblocks) | |
277 | return; | |
278 | ||
279 | for (i = 0; i < evlist->nr_mmaps; i++) { | |
280 | struct perf_mmap *map = &maps[i]; | |
281 | ||
282 | if (map->base) | |
93f20c0f | 283 | record__aio_sync(map, true); |
d3d1af6f AB |
284 | } |
285 | } | |
286 | ||
287 | static int nr_cblocks_default = 1; | |
93f20c0f | 288 | static int nr_cblocks_max = 4; |
d3d1af6f AB |
289 | |
290 | static int record__aio_parse(const struct option *opt, | |
93f20c0f | 291 | const char *str, |
d3d1af6f AB |
292 | int unset) |
293 | { | |
294 | struct record_opts *opts = (struct record_opts *)opt->value; | |
295 | ||
93f20c0f | 296 | if (unset) { |
d3d1af6f | 297 | opts->nr_cblocks = 0; |
93f20c0f AB |
298 | } else { |
299 | if (str) | |
300 | opts->nr_cblocks = strtol(str, NULL, 0); | |
301 | if (!opts->nr_cblocks) | |
302 | opts->nr_cblocks = nr_cblocks_default; | |
303 | } | |
d3d1af6f AB |
304 | |
305 | return 0; | |
306 | } | |
307 | #else /* HAVE_AIO_SUPPORT */ | |
93f20c0f AB |
308 | static int nr_cblocks_max = 0; |
309 | ||
310 | static int record__aio_sync(struct perf_mmap *md __maybe_unused, bool sync_all __maybe_unused) | |
d3d1af6f | 311 | { |
93f20c0f | 312 | return -1; |
d3d1af6f AB |
313 | } |
314 | ||
315 | static int record__aio_pushfn(void *to __maybe_unused, struct aiocb *cblock __maybe_unused, | |
316 | void *bf __maybe_unused, size_t size __maybe_unused, off_t off __maybe_unused) | |
317 | { | |
318 | return -1; | |
319 | } | |
320 | ||
321 | static off_t record__aio_get_pos(int trace_fd __maybe_unused) | |
322 | { | |
323 | return -1; | |
324 | } | |
325 | ||
326 | static void record__aio_set_pos(int trace_fd __maybe_unused, off_t pos __maybe_unused) | |
327 | { | |
328 | } | |
329 | ||
330 | static void record__aio_mmap_read_sync(struct record *rec __maybe_unused) | |
331 | { | |
332 | } | |
333 | #endif | |
334 | ||
335 | static int record__aio_enabled(struct record *rec) | |
336 | { | |
337 | return rec->opts.nr_cblocks > 0; | |
338 | } | |
339 | ||
45694aa7 | 340 | static int process_synthesized_event(struct perf_tool *tool, |
d20deb64 | 341 | union perf_event *event, |
1d037ca1 IT |
342 | struct perf_sample *sample __maybe_unused, |
343 | struct machine *machine __maybe_unused) | |
234fbbf5 | 344 | { |
8c6f45a7 | 345 | struct record *rec = container_of(tool, struct record, tool); |
ded2b8fe | 346 | return record__write(rec, NULL, event, event->header.size); |
234fbbf5 ACM |
347 | } |
348 | ||
ded2b8fe | 349 | static int record__pushfn(struct perf_mmap *map, void *to, void *bf, size_t size) |
d37f1586 ACM |
350 | { |
351 | struct record *rec = to; | |
352 | ||
353 | rec->samples++; | |
ded2b8fe | 354 | return record__write(rec, map, bf, size); |
d37f1586 ACM |
355 | } |
356 | ||
2dd6d8a1 AH |
357 | static volatile int done; |
358 | static volatile int signr = -1; | |
359 | static volatile int child_finished; | |
c0bdc1c4 | 360 | |
2dd6d8a1 AH |
361 | static void sig_handler(int sig) |
362 | { | |
363 | if (sig == SIGCHLD) | |
364 | child_finished = 1; | |
365 | else | |
366 | signr = sig; | |
367 | ||
368 | done = 1; | |
369 | } | |
370 | ||
a074865e WN |
371 | static void sigsegv_handler(int sig) |
372 | { | |
373 | perf_hooks__recover(); | |
374 | sighandler_dump_stack(sig); | |
375 | } | |
376 | ||
2dd6d8a1 AH |
377 | static void record__sig_exit(void) |
378 | { | |
379 | if (signr == -1) | |
380 | return; | |
381 | ||
382 | signal(signr, SIG_DFL); | |
383 | raise(signr); | |
384 | } | |
385 | ||
e31f0d01 AH |
386 | #ifdef HAVE_AUXTRACE_SUPPORT |
387 | ||
ef149c25 | 388 | static int record__process_auxtrace(struct perf_tool *tool, |
ded2b8fe | 389 | struct perf_mmap *map, |
ef149c25 AH |
390 | union perf_event *event, void *data1, |
391 | size_t len1, void *data2, size_t len2) | |
392 | { | |
393 | struct record *rec = container_of(tool, struct record, tool); | |
8ceb41d7 | 394 | struct perf_data *data = &rec->data; |
ef149c25 AH |
395 | size_t padding; |
396 | u8 pad[8] = {0}; | |
397 | ||
cd3dd8dd | 398 | if (!perf_data__is_pipe(data) && !perf_data__is_dir(data)) { |
99fa2984 | 399 | off_t file_offset; |
8ceb41d7 | 400 | int fd = perf_data__fd(data); |
99fa2984 AH |
401 | int err; |
402 | ||
403 | file_offset = lseek(fd, 0, SEEK_CUR); | |
404 | if (file_offset == -1) | |
405 | return -1; | |
406 | err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index, | |
407 | event, file_offset); | |
408 | if (err) | |
409 | return err; | |
410 | } | |
411 | ||
ef149c25 AH |
412 | /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */ |
413 | padding = (len1 + len2) & 7; | |
414 | if (padding) | |
415 | padding = 8 - padding; | |
416 | ||
ded2b8fe JO |
417 | record__write(rec, map, event, event->header.size); |
418 | record__write(rec, map, data1, len1); | |
ef149c25 | 419 | if (len2) |
ded2b8fe JO |
420 | record__write(rec, map, data2, len2); |
421 | record__write(rec, map, &pad, padding); | |
ef149c25 AH |
422 | |
423 | return 0; | |
424 | } | |
425 | ||
426 | static int record__auxtrace_mmap_read(struct record *rec, | |
e035f4ca | 427 | struct perf_mmap *map) |
ef149c25 AH |
428 | { |
429 | int ret; | |
430 | ||
e035f4ca | 431 | ret = auxtrace_mmap__read(map, rec->itr, &rec->tool, |
ef149c25 AH |
432 | record__process_auxtrace); |
433 | if (ret < 0) | |
434 | return ret; | |
435 | ||
436 | if (ret) | |
437 | rec->samples++; | |
438 | ||
439 | return 0; | |
440 | } | |
441 | ||
2dd6d8a1 | 442 | static int record__auxtrace_mmap_read_snapshot(struct record *rec, |
e035f4ca | 443 | struct perf_mmap *map) |
2dd6d8a1 AH |
444 | { |
445 | int ret; | |
446 | ||
e035f4ca | 447 | ret = auxtrace_mmap__read_snapshot(map, rec->itr, &rec->tool, |
2dd6d8a1 AH |
448 | record__process_auxtrace, |
449 | rec->opts.auxtrace_snapshot_size); | |
450 | if (ret < 0) | |
451 | return ret; | |
452 | ||
453 | if (ret) | |
454 | rec->samples++; | |
455 | ||
456 | return 0; | |
457 | } | |
458 | ||
459 | static int record__auxtrace_read_snapshot_all(struct record *rec) | |
460 | { | |
461 | int i; | |
462 | int rc = 0; | |
463 | ||
464 | for (i = 0; i < rec->evlist->nr_mmaps; i++) { | |
e035f4ca | 465 | struct perf_mmap *map = &rec->evlist->mmap[i]; |
2dd6d8a1 | 466 | |
e035f4ca | 467 | if (!map->auxtrace_mmap.base) |
2dd6d8a1 AH |
468 | continue; |
469 | ||
e035f4ca | 470 | if (record__auxtrace_mmap_read_snapshot(rec, map) != 0) { |
2dd6d8a1 AH |
471 | rc = -1; |
472 | goto out; | |
473 | } | |
474 | } | |
475 | out: | |
476 | return rc; | |
477 | } | |
478 | ||
479 | static void record__read_auxtrace_snapshot(struct record *rec) | |
480 | { | |
481 | pr_debug("Recording AUX area tracing snapshot\n"); | |
482 | if (record__auxtrace_read_snapshot_all(rec) < 0) { | |
5f9cf599 | 483 | trigger_error(&auxtrace_snapshot_trigger); |
2dd6d8a1 | 484 | } else { |
5f9cf599 WN |
485 | if (auxtrace_record__snapshot_finish(rec->itr)) |
486 | trigger_error(&auxtrace_snapshot_trigger); | |
487 | else | |
488 | trigger_ready(&auxtrace_snapshot_trigger); | |
2dd6d8a1 AH |
489 | } |
490 | } | |
491 | ||
4b5ea3bd AH |
492 | static int record__auxtrace_init(struct record *rec) |
493 | { | |
494 | int err; | |
495 | ||
496 | if (!rec->itr) { | |
497 | rec->itr = auxtrace_record__init(rec->evlist, &err); | |
498 | if (err) | |
499 | return err; | |
500 | } | |
501 | ||
502 | err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts, | |
503 | rec->opts.auxtrace_snapshot_opts); | |
504 | if (err) | |
505 | return err; | |
506 | ||
507 | return auxtrace_parse_filters(rec->evlist); | |
508 | } | |
509 | ||
e31f0d01 AH |
510 | #else |
511 | ||
512 | static inline | |
513 | int record__auxtrace_mmap_read(struct record *rec __maybe_unused, | |
e035f4ca | 514 | struct perf_mmap *map __maybe_unused) |
e31f0d01 AH |
515 | { |
516 | return 0; | |
517 | } | |
518 | ||
2dd6d8a1 AH |
519 | static inline |
520 | void record__read_auxtrace_snapshot(struct record *rec __maybe_unused) | |
de9ac07b | 521 | { |
f7b7c26e PZ |
522 | } |
523 | ||
2dd6d8a1 AH |
524 | static inline |
525 | int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused) | |
f7b7c26e | 526 | { |
2dd6d8a1 | 527 | return 0; |
de9ac07b PZ |
528 | } |
529 | ||
4b5ea3bd AH |
530 | static int record__auxtrace_init(struct record *rec __maybe_unused) |
531 | { | |
532 | return 0; | |
533 | } | |
534 | ||
2dd6d8a1 AH |
535 | #endif |
536 | ||
cda57a8c WN |
537 | static int record__mmap_evlist(struct record *rec, |
538 | struct perf_evlist *evlist) | |
539 | { | |
540 | struct record_opts *opts = &rec->opts; | |
541 | char msg[512]; | |
542 | ||
f13de660 AB |
543 | if (opts->affinity != PERF_AFFINITY_SYS) |
544 | cpu__setup_cpunode_map(); | |
545 | ||
7a276ff6 | 546 | if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, |
cda57a8c | 547 | opts->auxtrace_mmap_pages, |
9d2ed645 AB |
548 | opts->auxtrace_snapshot_mode, |
549 | opts->nr_cblocks, opts->affinity) < 0) { | |
cda57a8c WN |
550 | if (errno == EPERM) { |
551 | pr_err("Permission error mapping pages.\n" | |
552 | "Consider increasing " | |
553 | "/proc/sys/kernel/perf_event_mlock_kb,\n" | |
554 | "or try again with a smaller value of -m/--mmap_pages.\n" | |
555 | "(current value: %u,%u)\n", | |
556 | opts->mmap_pages, opts->auxtrace_mmap_pages); | |
557 | return -errno; | |
558 | } else { | |
559 | pr_err("failed to mmap with %d (%s)\n", errno, | |
c8b5f2c9 | 560 | str_error_r(errno, msg, sizeof(msg))); |
cda57a8c WN |
561 | if (errno) |
562 | return -errno; | |
563 | else | |
564 | return -EINVAL; | |
565 | } | |
566 | } | |
567 | return 0; | |
568 | } | |
569 | ||
570 | static int record__mmap(struct record *rec) | |
571 | { | |
572 | return record__mmap_evlist(rec, rec->evlist); | |
573 | } | |
574 | ||
8c6f45a7 | 575 | static int record__open(struct record *rec) |
dd7927f4 | 576 | { |
d6195a6a | 577 | char msg[BUFSIZ]; |
6a4bb04c | 578 | struct perf_evsel *pos; |
d20deb64 ACM |
579 | struct perf_evlist *evlist = rec->evlist; |
580 | struct perf_session *session = rec->session; | |
b4006796 | 581 | struct record_opts *opts = &rec->opts; |
8d3eca20 | 582 | int rc = 0; |
dd7927f4 | 583 | |
d3dbf43c ACM |
584 | /* |
585 | * For initial_delay we need to add a dummy event so that we can track | |
586 | * PERF_RECORD_MMAP while we wait for the initial delay to enable the | |
587 | * real events, the ones asked by the user. | |
588 | */ | |
589 | if (opts->initial_delay) { | |
590 | if (perf_evlist__add_dummy(evlist)) | |
591 | return -ENOMEM; | |
592 | ||
593 | pos = perf_evlist__first(evlist); | |
594 | pos->tracking = 0; | |
595 | pos = perf_evlist__last(evlist); | |
596 | pos->tracking = 1; | |
597 | pos->attr.enable_on_exec = 1; | |
598 | } | |
599 | ||
e68ae9cf | 600 | perf_evlist__config(evlist, opts, &callchain_param); |
cac21425 | 601 | |
e5cadb93 | 602 | evlist__for_each_entry(evlist, pos) { |
dd7927f4 | 603 | try_again: |
d988d5ee | 604 | if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) { |
56e52e85 | 605 | if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) { |
bb963e16 | 606 | if (verbose > 0) |
c0a54341 | 607 | ui__warning("%s\n", msg); |
d6d901c2 ZY |
608 | goto try_again; |
609 | } | |
cf99ad14 AK |
610 | if ((errno == EINVAL || errno == EBADF) && |
611 | pos->leader != pos && | |
612 | pos->weak_group) { | |
613 | pos = perf_evlist__reset_weak_group(evlist, pos); | |
614 | goto try_again; | |
615 | } | |
56e52e85 ACM |
616 | rc = -errno; |
617 | perf_evsel__open_strerror(pos, &opts->target, | |
618 | errno, msg, sizeof(msg)); | |
619 | ui__error("%s\n", msg); | |
8d3eca20 | 620 | goto out; |
c171b552 | 621 | } |
bfd8f72c AK |
622 | |
623 | pos->supported = true; | |
c171b552 | 624 | } |
a43d3f08 | 625 | |
23d4aad4 | 626 | if (perf_evlist__apply_filters(evlist, &pos)) { |
62d94b00 | 627 | pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", |
23d4aad4 | 628 | pos->filter, perf_evsel__name(pos), errno, |
c8b5f2c9 | 629 | str_error_r(errno, msg, sizeof(msg))); |
8d3eca20 | 630 | rc = -1; |
5d8bb1ec MP |
631 | goto out; |
632 | } | |
633 | ||
cda57a8c WN |
634 | rc = record__mmap(rec); |
635 | if (rc) | |
8d3eca20 | 636 | goto out; |
0a27d7f9 | 637 | |
563aecb2 | 638 | session->evlist = evlist; |
7b56cce2 | 639 | perf_session__set_id_hdr_size(session); |
8d3eca20 DA |
640 | out: |
641 | return rc; | |
16c8a109 PZ |
642 | } |
643 | ||
e3d59112 NK |
644 | static int process_sample_event(struct perf_tool *tool, |
645 | union perf_event *event, | |
646 | struct perf_sample *sample, | |
647 | struct perf_evsel *evsel, | |
648 | struct machine *machine) | |
649 | { | |
650 | struct record *rec = container_of(tool, struct record, tool); | |
651 | ||
68588baf JY |
652 | if (rec->evlist->first_sample_time == 0) |
653 | rec->evlist->first_sample_time = sample->time; | |
654 | ||
655 | rec->evlist->last_sample_time = sample->time; | |
e3d59112 | 656 | |
68588baf JY |
657 | if (rec->buildid_all) |
658 | return 0; | |
659 | ||
660 | rec->samples++; | |
e3d59112 NK |
661 | return build_id__mark_dso_hit(tool, event, sample, evsel, machine); |
662 | } | |
663 | ||
8c6f45a7 | 664 | static int process_buildids(struct record *rec) |
6122e4e4 | 665 | { |
f5fc1412 | 666 | struct perf_session *session = rec->session; |
6122e4e4 | 667 | |
45112e89 | 668 | if (perf_data__size(&rec->data) == 0) |
9f591fd7 ACM |
669 | return 0; |
670 | ||
00dc8657 NK |
671 | /* |
672 | * During this process, it'll load kernel map and replace the | |
673 | * dso->long_name to a real pathname it found. In this case | |
674 | * we prefer the vmlinux path like | |
675 | * /lib/modules/3.16.4/build/vmlinux | |
676 | * | |
677 | * rather than build-id path (in debug directory). | |
678 | * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 | |
679 | */ | |
680 | symbol_conf.ignore_vmlinux_buildid = true; | |
681 | ||
6156681b NK |
682 | /* |
683 | * If --buildid-all is given, it marks all DSO regardless of hits, | |
68588baf JY |
684 | * so no need to process samples. But if timestamp_boundary is enabled, |
685 | * it still needs to walk on all samples to get the timestamps of | |
686 | * first/last samples. | |
6156681b | 687 | */ |
68588baf | 688 | if (rec->buildid_all && !rec->timestamp_boundary) |
6156681b NK |
689 | rec->tool.sample = NULL; |
690 | ||
b7b61cbe | 691 | return perf_session__process_events(session); |
6122e4e4 ACM |
692 | } |
693 | ||
8115d60c | 694 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
695 | { |
696 | int err; | |
45694aa7 | 697 | struct perf_tool *tool = data; |
a1645ce1 ZY |
698 | /* |
699 | *As for guest kernel when processing subcommand record&report, | |
700 | *we arrange module mmap prior to guest kernel mmap and trigger | |
701 | *a preload dso because default guest module symbols are loaded | |
702 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
703 | *method is used to avoid symbol missing when the first addr is | |
704 | *in module instead of in guest kernel. | |
705 | */ | |
45694aa7 | 706 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 707 | machine); |
a1645ce1 ZY |
708 | if (err < 0) |
709 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 710 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 711 | |
a1645ce1 ZY |
712 | /* |
713 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
714 | * have no _text sometimes. | |
715 | */ | |
45694aa7 | 716 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
0ae617be | 717 | machine); |
a1645ce1 ZY |
718 | if (err < 0) |
719 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 720 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
721 | } |
722 | ||
98402807 FW |
723 | static struct perf_event_header finished_round_event = { |
724 | .size = sizeof(struct perf_event_header), | |
725 | .type = PERF_RECORD_FINISHED_ROUND, | |
726 | }; | |
727 | ||
f13de660 AB |
728 | static void record__adjust_affinity(struct record *rec, struct perf_mmap *map) |
729 | { | |
730 | if (rec->opts.affinity != PERF_AFFINITY_SYS && | |
731 | !CPU_EQUAL(&rec->affinity_mask, &map->affinity_mask)) { | |
732 | CPU_ZERO(&rec->affinity_mask); | |
733 | CPU_OR(&rec->affinity_mask, &rec->affinity_mask, &map->affinity_mask); | |
734 | sched_setaffinity(0, sizeof(rec->affinity_mask), &rec->affinity_mask); | |
735 | } | |
736 | } | |
737 | ||
a4ea0ec4 | 738 | static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist, |
0b72d69a | 739 | bool overwrite) |
98402807 | 740 | { |
dcabb507 | 741 | u64 bytes_written = rec->bytes_written; |
0e2e63dd | 742 | int i; |
8d3eca20 | 743 | int rc = 0; |
a4ea0ec4 | 744 | struct perf_mmap *maps; |
d3d1af6f AB |
745 | int trace_fd = rec->data.file.fd; |
746 | off_t off; | |
98402807 | 747 | |
cb21686b WN |
748 | if (!evlist) |
749 | return 0; | |
ef149c25 | 750 | |
0b72d69a | 751 | maps = overwrite ? evlist->overwrite_mmap : evlist->mmap; |
a4ea0ec4 WN |
752 | if (!maps) |
753 | return 0; | |
754 | ||
0b72d69a | 755 | if (overwrite && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING) |
54cc54de WN |
756 | return 0; |
757 | ||
d3d1af6f AB |
758 | if (record__aio_enabled(rec)) |
759 | off = record__aio_get_pos(trace_fd); | |
760 | ||
cb21686b | 761 | for (i = 0; i < evlist->nr_mmaps; i++) { |
e035f4ca | 762 | struct perf_mmap *map = &maps[i]; |
cb21686b | 763 | |
e035f4ca | 764 | if (map->base) { |
f13de660 | 765 | record__adjust_affinity(rec, map); |
d3d1af6f AB |
766 | if (!record__aio_enabled(rec)) { |
767 | if (perf_mmap__push(map, rec, record__pushfn) != 0) { | |
768 | rc = -1; | |
769 | goto out; | |
770 | } | |
771 | } else { | |
93f20c0f | 772 | int idx; |
d3d1af6f AB |
773 | /* |
774 | * Call record__aio_sync() to wait till map->data buffer | |
775 | * becomes available after previous aio write request. | |
776 | */ | |
93f20c0f AB |
777 | idx = record__aio_sync(map, false); |
778 | if (perf_mmap__aio_push(map, rec, idx, record__aio_pushfn, &off) != 0) { | |
d3d1af6f AB |
779 | record__aio_set_pos(trace_fd, off); |
780 | rc = -1; | |
781 | goto out; | |
782 | } | |
8d3eca20 DA |
783 | } |
784 | } | |
ef149c25 | 785 | |
e035f4ca JO |
786 | if (map->auxtrace_mmap.base && !rec->opts.auxtrace_snapshot_mode && |
787 | record__auxtrace_mmap_read(rec, map) != 0) { | |
ef149c25 AH |
788 | rc = -1; |
789 | goto out; | |
790 | } | |
98402807 FW |
791 | } |
792 | ||
d3d1af6f AB |
793 | if (record__aio_enabled(rec)) |
794 | record__aio_set_pos(trace_fd, off); | |
795 | ||
dcabb507 JO |
796 | /* |
797 | * Mark the round finished in case we wrote | |
798 | * at least one event. | |
799 | */ | |
800 | if (bytes_written != rec->bytes_written) | |
ded2b8fe | 801 | rc = record__write(rec, NULL, &finished_round_event, sizeof(finished_round_event)); |
8d3eca20 | 802 | |
0b72d69a | 803 | if (overwrite) |
54cc54de | 804 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); |
8d3eca20 DA |
805 | out: |
806 | return rc; | |
98402807 FW |
807 | } |
808 | ||
cb21686b WN |
809 | static int record__mmap_read_all(struct record *rec) |
810 | { | |
811 | int err; | |
812 | ||
a4ea0ec4 | 813 | err = record__mmap_read_evlist(rec, rec->evlist, false); |
cb21686b WN |
814 | if (err) |
815 | return err; | |
816 | ||
05737464 | 817 | return record__mmap_read_evlist(rec, rec->evlist, true); |
cb21686b WN |
818 | } |
819 | ||
8c6f45a7 | 820 | static void record__init_features(struct record *rec) |
57706abc | 821 | { |
57706abc DA |
822 | struct perf_session *session = rec->session; |
823 | int feat; | |
824 | ||
825 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) | |
826 | perf_header__set_feat(&session->header, feat); | |
827 | ||
828 | if (rec->no_buildid) | |
829 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); | |
830 | ||
3e2be2da | 831 | if (!have_tracepoints(&rec->evlist->entries)) |
57706abc DA |
832 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
833 | ||
834 | if (!rec->opts.branch_stack) | |
835 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); | |
ef149c25 AH |
836 | |
837 | if (!rec->opts.full_auxtrace) | |
838 | perf_header__clear_feat(&session->header, HEADER_AUXTRACE); | |
ffa517ad | 839 | |
cf790516 AB |
840 | if (!(rec->opts.use_clockid && rec->opts.clockid_res_ns)) |
841 | perf_header__clear_feat(&session->header, HEADER_CLOCKID); | |
842 | ||
258031c0 JO |
843 | perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); |
844 | ||
ffa517ad | 845 | perf_header__clear_feat(&session->header, HEADER_STAT); |
57706abc DA |
846 | } |
847 | ||
e1ab48ba WN |
848 | static void |
849 | record__finish_output(struct record *rec) | |
850 | { | |
8ceb41d7 JO |
851 | struct perf_data *data = &rec->data; |
852 | int fd = perf_data__fd(data); | |
e1ab48ba | 853 | |
8ceb41d7 | 854 | if (data->is_pipe) |
e1ab48ba WN |
855 | return; |
856 | ||
857 | rec->session->header.data_size += rec->bytes_written; | |
45112e89 | 858 | data->file.size = lseek(perf_data__fd(data), 0, SEEK_CUR); |
e1ab48ba WN |
859 | |
860 | if (!rec->no_buildid) { | |
861 | process_buildids(rec); | |
862 | ||
863 | if (rec->buildid_all) | |
864 | dsos__hit_all(rec->session); | |
865 | } | |
866 | perf_session__write_header(rec->session, rec->evlist, fd, true); | |
867 | ||
868 | return; | |
869 | } | |
870 | ||
4ea648ae | 871 | static int record__synthesize_workload(struct record *rec, bool tail) |
be7b0c9e | 872 | { |
9d6aae72 ACM |
873 | int err; |
874 | struct thread_map *thread_map; | |
be7b0c9e | 875 | |
4ea648ae WN |
876 | if (rec->opts.tail_synthesize != tail) |
877 | return 0; | |
878 | ||
9d6aae72 ACM |
879 | thread_map = thread_map__new_by_tid(rec->evlist->workload.pid); |
880 | if (thread_map == NULL) | |
881 | return -1; | |
882 | ||
883 | err = perf_event__synthesize_thread_map(&rec->tool, thread_map, | |
be7b0c9e WN |
884 | process_synthesized_event, |
885 | &rec->session->machines.host, | |
3fcb10e4 | 886 | rec->opts.sample_address); |
9d6aae72 ACM |
887 | thread_map__put(thread_map); |
888 | return err; | |
be7b0c9e WN |
889 | } |
890 | ||
4ea648ae | 891 | static int record__synthesize(struct record *rec, bool tail); |
3c1cb7e3 | 892 | |
ecfd7a9c WN |
893 | static int |
894 | record__switch_output(struct record *rec, bool at_exit) | |
895 | { | |
8ceb41d7 | 896 | struct perf_data *data = &rec->data; |
ecfd7a9c | 897 | int fd, err; |
03724b2e | 898 | char *new_filename; |
ecfd7a9c WN |
899 | |
900 | /* Same Size: "2015122520103046"*/ | |
901 | char timestamp[] = "InvalidTimestamp"; | |
902 | ||
d3d1af6f AB |
903 | record__aio_mmap_read_sync(rec); |
904 | ||
4ea648ae WN |
905 | record__synthesize(rec, true); |
906 | if (target__none(&rec->opts.target)) | |
907 | record__synthesize_workload(rec, true); | |
908 | ||
ecfd7a9c WN |
909 | rec->samples = 0; |
910 | record__finish_output(rec); | |
911 | err = fetch_current_timestamp(timestamp, sizeof(timestamp)); | |
912 | if (err) { | |
913 | pr_err("Failed to get current timestamp\n"); | |
914 | return -EINVAL; | |
915 | } | |
916 | ||
8ceb41d7 | 917 | fd = perf_data__switch(data, timestamp, |
ecfd7a9c | 918 | rec->session->header.data_offset, |
03724b2e | 919 | at_exit, &new_filename); |
ecfd7a9c WN |
920 | if (fd >= 0 && !at_exit) { |
921 | rec->bytes_written = 0; | |
922 | rec->session->header.data_size = 0; | |
923 | } | |
924 | ||
925 | if (!quiet) | |
926 | fprintf(stderr, "[ perf record: Dump %s.%s ]\n", | |
2d4f2799 | 927 | data->path, timestamp); |
3c1cb7e3 | 928 | |
03724b2e AK |
929 | if (rec->switch_output.num_files) { |
930 | int n = rec->switch_output.cur_file + 1; | |
931 | ||
932 | if (n >= rec->switch_output.num_files) | |
933 | n = 0; | |
934 | rec->switch_output.cur_file = n; | |
935 | if (rec->switch_output.filenames[n]) { | |
936 | remove(rec->switch_output.filenames[n]); | |
937 | free(rec->switch_output.filenames[n]); | |
938 | } | |
939 | rec->switch_output.filenames[n] = new_filename; | |
940 | } else { | |
941 | free(new_filename); | |
942 | } | |
943 | ||
3c1cb7e3 | 944 | /* Output tracking events */ |
be7b0c9e | 945 | if (!at_exit) { |
4ea648ae | 946 | record__synthesize(rec, false); |
3c1cb7e3 | 947 | |
be7b0c9e WN |
948 | /* |
949 | * In 'perf record --switch-output' without -a, | |
950 | * record__synthesize() in record__switch_output() won't | |
951 | * generate tracking events because there's no thread_map | |
952 | * in evlist. Which causes newly created perf.data doesn't | |
953 | * contain map and comm information. | |
954 | * Create a fake thread_map and directly call | |
955 | * perf_event__synthesize_thread_map() for those events. | |
956 | */ | |
957 | if (target__none(&rec->opts.target)) | |
4ea648ae | 958 | record__synthesize_workload(rec, false); |
be7b0c9e | 959 | } |
ecfd7a9c WN |
960 | return fd; |
961 | } | |
962 | ||
f33cbe72 ACM |
963 | static volatile int workload_exec_errno; |
964 | ||
965 | /* | |
966 | * perf_evlist__prepare_workload will send a SIGUSR1 | |
967 | * if the fork fails, since we asked by setting its | |
968 | * want_signal to true. | |
969 | */ | |
45604710 NK |
970 | static void workload_exec_failed_signal(int signo __maybe_unused, |
971 | siginfo_t *info, | |
f33cbe72 ACM |
972 | void *ucontext __maybe_unused) |
973 | { | |
974 | workload_exec_errno = info->si_value.sival_int; | |
975 | done = 1; | |
f33cbe72 ACM |
976 | child_finished = 1; |
977 | } | |
978 | ||
2dd6d8a1 | 979 | static void snapshot_sig_handler(int sig); |
bfacbe3b | 980 | static void alarm_sig_handler(int sig); |
2dd6d8a1 | 981 | |
46bc29b9 AH |
982 | int __weak |
983 | perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused, | |
984 | struct perf_tool *tool __maybe_unused, | |
985 | perf_event__handler_t process __maybe_unused, | |
986 | struct machine *machine __maybe_unused) | |
987 | { | |
988 | return 0; | |
989 | } | |
990 | ||
ee667f94 WN |
991 | static const struct perf_event_mmap_page * |
992 | perf_evlist__pick_pc(struct perf_evlist *evlist) | |
993 | { | |
b2cb615d WN |
994 | if (evlist) { |
995 | if (evlist->mmap && evlist->mmap[0].base) | |
996 | return evlist->mmap[0].base; | |
0b72d69a WN |
997 | if (evlist->overwrite_mmap && evlist->overwrite_mmap[0].base) |
998 | return evlist->overwrite_mmap[0].base; | |
b2cb615d | 999 | } |
ee667f94 WN |
1000 | return NULL; |
1001 | } | |
1002 | ||
c45628b0 WN |
1003 | static const struct perf_event_mmap_page *record__pick_pc(struct record *rec) |
1004 | { | |
ee667f94 WN |
1005 | const struct perf_event_mmap_page *pc; |
1006 | ||
1007 | pc = perf_evlist__pick_pc(rec->evlist); | |
1008 | if (pc) | |
1009 | return pc; | |
c45628b0 WN |
1010 | return NULL; |
1011 | } | |
1012 | ||
4ea648ae | 1013 | static int record__synthesize(struct record *rec, bool tail) |
c45c86eb WN |
1014 | { |
1015 | struct perf_session *session = rec->session; | |
1016 | struct machine *machine = &session->machines.host; | |
8ceb41d7 | 1017 | struct perf_data *data = &rec->data; |
c45c86eb WN |
1018 | struct record_opts *opts = &rec->opts; |
1019 | struct perf_tool *tool = &rec->tool; | |
8ceb41d7 | 1020 | int fd = perf_data__fd(data); |
c45c86eb WN |
1021 | int err = 0; |
1022 | ||
4ea648ae WN |
1023 | if (rec->opts.tail_synthesize != tail) |
1024 | return 0; | |
1025 | ||
8ceb41d7 | 1026 | if (data->is_pipe) { |
a2015516 JO |
1027 | /* |
1028 | * We need to synthesize events first, because some | |
1029 | * features works on top of them (on report side). | |
1030 | */ | |
318ec184 | 1031 | err = perf_event__synthesize_attrs(tool, rec->evlist, |
c45c86eb WN |
1032 | process_synthesized_event); |
1033 | if (err < 0) { | |
1034 | pr_err("Couldn't synthesize attrs.\n"); | |
1035 | goto out; | |
1036 | } | |
1037 | ||
a2015516 JO |
1038 | err = perf_event__synthesize_features(tool, session, rec->evlist, |
1039 | process_synthesized_event); | |
1040 | if (err < 0) { | |
1041 | pr_err("Couldn't synthesize features.\n"); | |
1042 | return err; | |
1043 | } | |
1044 | ||
c45c86eb WN |
1045 | if (have_tracepoints(&rec->evlist->entries)) { |
1046 | /* | |
1047 | * FIXME err <= 0 here actually means that | |
1048 | * there were no tracepoints so its not really | |
1049 | * an error, just that we don't need to | |
1050 | * synthesize anything. We really have to | |
1051 | * return this more properly and also | |
1052 | * propagate errors that now are calling die() | |
1053 | */ | |
1054 | err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist, | |
1055 | process_synthesized_event); | |
1056 | if (err <= 0) { | |
1057 | pr_err("Couldn't record tracing data.\n"); | |
1058 | goto out; | |
1059 | } | |
1060 | rec->bytes_written += err; | |
1061 | } | |
1062 | } | |
1063 | ||
c45628b0 | 1064 | err = perf_event__synth_time_conv(record__pick_pc(rec), tool, |
46bc29b9 AH |
1065 | process_synthesized_event, machine); |
1066 | if (err) | |
1067 | goto out; | |
1068 | ||
c45c86eb WN |
1069 | if (rec->opts.full_auxtrace) { |
1070 | err = perf_event__synthesize_auxtrace_info(rec->itr, tool, | |
1071 | session, process_synthesized_event); | |
1072 | if (err) | |
1073 | goto out; | |
1074 | } | |
1075 | ||
6c443954 ACM |
1076 | if (!perf_evlist__exclude_kernel(rec->evlist)) { |
1077 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, | |
1078 | machine); | |
1079 | WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n" | |
1080 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
1081 | "Check /proc/kallsyms permission or run as root.\n"); | |
1082 | ||
1083 | err = perf_event__synthesize_modules(tool, process_synthesized_event, | |
1084 | machine); | |
1085 | WARN_ONCE(err < 0, "Couldn't record kernel module information.\n" | |
1086 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
1087 | "Check /proc/modules permission or run as root.\n"); | |
1088 | } | |
c45c86eb WN |
1089 | |
1090 | if (perf_guest) { | |
1091 | machines__process_guests(&session->machines, | |
1092 | perf_event__synthesize_guest_os, tool); | |
1093 | } | |
1094 | ||
bfd8f72c AK |
1095 | err = perf_event__synthesize_extra_attr(&rec->tool, |
1096 | rec->evlist, | |
1097 | process_synthesized_event, | |
1098 | data->is_pipe); | |
1099 | if (err) | |
1100 | goto out; | |
1101 | ||
373565d2 AK |
1102 | err = perf_event__synthesize_thread_map2(&rec->tool, rec->evlist->threads, |
1103 | process_synthesized_event, | |
1104 | NULL); | |
1105 | if (err < 0) { | |
1106 | pr_err("Couldn't synthesize thread map.\n"); | |
1107 | return err; | |
1108 | } | |
1109 | ||
1110 | err = perf_event__synthesize_cpu_map(&rec->tool, rec->evlist->cpus, | |
1111 | process_synthesized_event, NULL); | |
1112 | if (err < 0) { | |
1113 | pr_err("Couldn't synthesize cpu map.\n"); | |
1114 | return err; | |
1115 | } | |
1116 | ||
e5416950 | 1117 | err = perf_event__synthesize_bpf_events(session, process_synthesized_event, |
7b612e29 SL |
1118 | machine, opts); |
1119 | if (err < 0) | |
1120 | pr_warning("Couldn't synthesize bpf events.\n"); | |
1121 | ||
c45c86eb WN |
1122 | err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads, |
1123 | process_synthesized_event, opts->sample_address, | |
3fcb10e4 | 1124 | 1); |
c45c86eb WN |
1125 | out: |
1126 | return err; | |
1127 | } | |
1128 | ||
8c6f45a7 | 1129 | static int __cmd_record(struct record *rec, int argc, const char **argv) |
16c8a109 | 1130 | { |
57706abc | 1131 | int err; |
45604710 | 1132 | int status = 0; |
8b412664 | 1133 | unsigned long waking = 0; |
46be604b | 1134 | const bool forks = argc > 0; |
45694aa7 | 1135 | struct perf_tool *tool = &rec->tool; |
b4006796 | 1136 | struct record_opts *opts = &rec->opts; |
8ceb41d7 | 1137 | struct perf_data *data = &rec->data; |
d20deb64 | 1138 | struct perf_session *session; |
6dcf45ef | 1139 | bool disabled = false, draining = false; |
42aa276f | 1140 | int fd; |
de9ac07b | 1141 | |
45604710 | 1142 | atexit(record__sig_exit); |
f5970550 PZ |
1143 | signal(SIGCHLD, sig_handler); |
1144 | signal(SIGINT, sig_handler); | |
804f7ac7 | 1145 | signal(SIGTERM, sig_handler); |
a074865e | 1146 | signal(SIGSEGV, sigsegv_handler); |
c0bdc1c4 | 1147 | |
f3b3614a HB |
1148 | if (rec->opts.record_namespaces) |
1149 | tool->namespace_events = true; | |
1150 | ||
dc0c6127 | 1151 | if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) { |
2dd6d8a1 | 1152 | signal(SIGUSR2, snapshot_sig_handler); |
3c1cb7e3 WN |
1153 | if (rec->opts.auxtrace_snapshot_mode) |
1154 | trigger_on(&auxtrace_snapshot_trigger); | |
dc0c6127 | 1155 | if (rec->switch_output.enabled) |
3c1cb7e3 | 1156 | trigger_on(&switch_output_trigger); |
c0bdc1c4 | 1157 | } else { |
2dd6d8a1 | 1158 | signal(SIGUSR2, SIG_IGN); |
c0bdc1c4 | 1159 | } |
f5970550 | 1160 | |
8ceb41d7 | 1161 | session = perf_session__new(data, false, tool); |
94c744b6 | 1162 | if (session == NULL) { |
ffa91880 | 1163 | pr_err("Perf session creation failed.\n"); |
a9a70bbc ACM |
1164 | return -1; |
1165 | } | |
1166 | ||
8ceb41d7 | 1167 | fd = perf_data__fd(data); |
d20deb64 ACM |
1168 | rec->session = session; |
1169 | ||
8c6f45a7 | 1170 | record__init_features(rec); |
330aa675 | 1171 | |
cf790516 AB |
1172 | if (rec->opts.use_clockid && rec->opts.clockid_res_ns) |
1173 | session->header.env.clockid_res_ns = rec->opts.clockid_res_ns; | |
1174 | ||
d4db3f16 | 1175 | if (forks) { |
3e2be2da | 1176 | err = perf_evlist__prepare_workload(rec->evlist, &opts->target, |
8ceb41d7 | 1177 | argv, data->is_pipe, |
735f7e0b | 1178 | workload_exec_failed_signal); |
35b9d88e ACM |
1179 | if (err < 0) { |
1180 | pr_err("Couldn't run the workload!\n"); | |
45604710 | 1181 | status = err; |
35b9d88e | 1182 | goto out_delete_session; |
856e9660 | 1183 | } |
856e9660 PZ |
1184 | } |
1185 | ||
ad46e48c JO |
1186 | /* |
1187 | * If we have just single event and are sending data | |
1188 | * through pipe, we need to force the ids allocation, | |
1189 | * because we synthesize event name through the pipe | |
1190 | * and need the id for that. | |
1191 | */ | |
1192 | if (data->is_pipe && rec->evlist->nr_entries == 1) | |
1193 | rec->opts.sample_id = true; | |
1194 | ||
8c6f45a7 | 1195 | if (record__open(rec) != 0) { |
8d3eca20 | 1196 | err = -1; |
45604710 | 1197 | goto out_child; |
8d3eca20 | 1198 | } |
de9ac07b | 1199 | |
8690a2a7 WN |
1200 | err = bpf__apply_obj_config(); |
1201 | if (err) { | |
1202 | char errbuf[BUFSIZ]; | |
1203 | ||
1204 | bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); | |
1205 | pr_err("ERROR: Apply config to BPF failed: %s\n", | |
1206 | errbuf); | |
1207 | goto out_child; | |
1208 | } | |
1209 | ||
cca8482c AH |
1210 | /* |
1211 | * Normally perf_session__new would do this, but it doesn't have the | |
1212 | * evlist. | |
1213 | */ | |
1214 | if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) { | |
1215 | pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n"); | |
1216 | rec->tool.ordered_events = false; | |
1217 | } | |
1218 | ||
3e2be2da | 1219 | if (!rec->evlist->nr_groups) |
a8bb559b NK |
1220 | perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); |
1221 | ||
8ceb41d7 | 1222 | if (data->is_pipe) { |
42aa276f | 1223 | err = perf_header__write_pipe(fd); |
529870e3 | 1224 | if (err < 0) |
45604710 | 1225 | goto out_child; |
563aecb2 | 1226 | } else { |
42aa276f | 1227 | err = perf_session__write_header(session, rec->evlist, fd, false); |
d5eed904 | 1228 | if (err < 0) |
45604710 | 1229 | goto out_child; |
56b03f3c ACM |
1230 | } |
1231 | ||
d3665498 | 1232 | if (!rec->no_buildid |
e20960c0 | 1233 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
d3665498 | 1234 | pr_err("Couldn't generate buildids. " |
e20960c0 | 1235 | "Use --no-buildid to profile anyway.\n"); |
8d3eca20 | 1236 | err = -1; |
45604710 | 1237 | goto out_child; |
e20960c0 RR |
1238 | } |
1239 | ||
4ea648ae | 1240 | err = record__synthesize(rec, false); |
c45c86eb | 1241 | if (err < 0) |
45604710 | 1242 | goto out_child; |
8d3eca20 | 1243 | |
d20deb64 | 1244 | if (rec->realtime_prio) { |
de9ac07b PZ |
1245 | struct sched_param param; |
1246 | ||
d20deb64 | 1247 | param.sched_priority = rec->realtime_prio; |
de9ac07b | 1248 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
6beba7ad | 1249 | pr_err("Could not set realtime priority.\n"); |
8d3eca20 | 1250 | err = -1; |
45604710 | 1251 | goto out_child; |
de9ac07b PZ |
1252 | } |
1253 | } | |
1254 | ||
774cb499 JO |
1255 | /* |
1256 | * When perf is starting the traced process, all the events | |
1257 | * (apart from group members) have enable_on_exec=1 set, | |
1258 | * so don't spoil it by prematurely enabling them. | |
1259 | */ | |
6619a53e | 1260 | if (!target__none(&opts->target) && !opts->initial_delay) |
3e2be2da | 1261 | perf_evlist__enable(rec->evlist); |
764e16a3 | 1262 | |
856e9660 PZ |
1263 | /* |
1264 | * Let the child rip | |
1265 | */ | |
e803cf97 | 1266 | if (forks) { |
20a8a3cf | 1267 | struct machine *machine = &session->machines.host; |
e5bed564 | 1268 | union perf_event *event; |
e907caf3 | 1269 | pid_t tgid; |
e5bed564 NK |
1270 | |
1271 | event = malloc(sizeof(event->comm) + machine->id_hdr_size); | |
1272 | if (event == NULL) { | |
1273 | err = -ENOMEM; | |
1274 | goto out_child; | |
1275 | } | |
1276 | ||
e803cf97 NK |
1277 | /* |
1278 | * Some H/W events are generated before COMM event | |
1279 | * which is emitted during exec(), so perf script | |
1280 | * cannot see a correct process name for those events. | |
1281 | * Synthesize COMM event to prevent it. | |
1282 | */ | |
e907caf3 HB |
1283 | tgid = perf_event__synthesize_comm(tool, event, |
1284 | rec->evlist->workload.pid, | |
1285 | process_synthesized_event, | |
1286 | machine); | |
1287 | free(event); | |
1288 | ||
1289 | if (tgid == -1) | |
1290 | goto out_child; | |
1291 | ||
1292 | event = malloc(sizeof(event->namespaces) + | |
1293 | (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + | |
1294 | machine->id_hdr_size); | |
1295 | if (event == NULL) { | |
1296 | err = -ENOMEM; | |
1297 | goto out_child; | |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | * Synthesize NAMESPACES event for the command specified. | |
1302 | */ | |
1303 | perf_event__synthesize_namespaces(tool, event, | |
1304 | rec->evlist->workload.pid, | |
1305 | tgid, process_synthesized_event, | |
1306 | machine); | |
e5bed564 | 1307 | free(event); |
e803cf97 | 1308 | |
3e2be2da | 1309 | perf_evlist__start_workload(rec->evlist); |
e803cf97 | 1310 | } |
856e9660 | 1311 | |
6619a53e | 1312 | if (opts->initial_delay) { |
0693e680 | 1313 | usleep(opts->initial_delay * USEC_PER_MSEC); |
6619a53e AK |
1314 | perf_evlist__enable(rec->evlist); |
1315 | } | |
1316 | ||
5f9cf599 | 1317 | trigger_ready(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1318 | trigger_ready(&switch_output_trigger); |
a074865e | 1319 | perf_hooks__invoke_record_start(); |
649c48a9 | 1320 | for (;;) { |
9f065194 | 1321 | unsigned long long hits = rec->samples; |
de9ac07b | 1322 | |
05737464 WN |
1323 | /* |
1324 | * rec->evlist->bkw_mmap_state is possible to be | |
1325 | * BKW_MMAP_EMPTY here: when done == true and | |
1326 | * hits != rec->samples in previous round. | |
1327 | * | |
1328 | * perf_evlist__toggle_bkw_mmap ensure we never | |
1329 | * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING. | |
1330 | */ | |
1331 | if (trigger_is_hit(&switch_output_trigger) || done || draining) | |
1332 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING); | |
1333 | ||
8c6f45a7 | 1334 | if (record__mmap_read_all(rec) < 0) { |
5f9cf599 | 1335 | trigger_error(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1336 | trigger_error(&switch_output_trigger); |
8d3eca20 | 1337 | err = -1; |
45604710 | 1338 | goto out_child; |
8d3eca20 | 1339 | } |
de9ac07b | 1340 | |
2dd6d8a1 AH |
1341 | if (auxtrace_record__snapshot_started) { |
1342 | auxtrace_record__snapshot_started = 0; | |
5f9cf599 | 1343 | if (!trigger_is_error(&auxtrace_snapshot_trigger)) |
2dd6d8a1 | 1344 | record__read_auxtrace_snapshot(rec); |
5f9cf599 | 1345 | if (trigger_is_error(&auxtrace_snapshot_trigger)) { |
2dd6d8a1 AH |
1346 | pr_err("AUX area tracing snapshot failed\n"); |
1347 | err = -1; | |
1348 | goto out_child; | |
1349 | } | |
1350 | } | |
1351 | ||
3c1cb7e3 | 1352 | if (trigger_is_hit(&switch_output_trigger)) { |
05737464 WN |
1353 | /* |
1354 | * If switch_output_trigger is hit, the data in | |
1355 | * overwritable ring buffer should have been collected, | |
1356 | * so bkw_mmap_state should be set to BKW_MMAP_EMPTY. | |
1357 | * | |
1358 | * If SIGUSR2 raise after or during record__mmap_read_all(), | |
1359 | * record__mmap_read_all() didn't collect data from | |
1360 | * overwritable ring buffer. Read again. | |
1361 | */ | |
1362 | if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING) | |
1363 | continue; | |
3c1cb7e3 WN |
1364 | trigger_ready(&switch_output_trigger); |
1365 | ||
05737464 WN |
1366 | /* |
1367 | * Reenable events in overwrite ring buffer after | |
1368 | * record__mmap_read_all(): we should have collected | |
1369 | * data from it. | |
1370 | */ | |
1371 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING); | |
1372 | ||
3c1cb7e3 WN |
1373 | if (!quiet) |
1374 | fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n", | |
1375 | waking); | |
1376 | waking = 0; | |
1377 | fd = record__switch_output(rec, false); | |
1378 | if (fd < 0) { | |
1379 | pr_err("Failed to switch to new file\n"); | |
1380 | trigger_error(&switch_output_trigger); | |
1381 | err = fd; | |
1382 | goto out_child; | |
1383 | } | |
bfacbe3b JO |
1384 | |
1385 | /* re-arm the alarm */ | |
1386 | if (rec->switch_output.time) | |
1387 | alarm(rec->switch_output.time); | |
3c1cb7e3 WN |
1388 | } |
1389 | ||
d20deb64 | 1390 | if (hits == rec->samples) { |
6dcf45ef | 1391 | if (done || draining) |
649c48a9 | 1392 | break; |
f66a889d | 1393 | err = perf_evlist__poll(rec->evlist, -1); |
a515114f JO |
1394 | /* |
1395 | * Propagate error, only if there's any. Ignore positive | |
1396 | * number of returned events and interrupt error. | |
1397 | */ | |
1398 | if (err > 0 || (err < 0 && errno == EINTR)) | |
45604710 | 1399 | err = 0; |
8b412664 | 1400 | waking++; |
6dcf45ef ACM |
1401 | |
1402 | if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0) | |
1403 | draining = true; | |
8b412664 PZ |
1404 | } |
1405 | ||
774cb499 JO |
1406 | /* |
1407 | * When perf is starting the traced process, at the end events | |
1408 | * die with the process and we wait for that. Thus no need to | |
1409 | * disable events in this case. | |
1410 | */ | |
602ad878 | 1411 | if (done && !disabled && !target__none(&opts->target)) { |
5f9cf599 | 1412 | trigger_off(&auxtrace_snapshot_trigger); |
3e2be2da | 1413 | perf_evlist__disable(rec->evlist); |
2711926a JO |
1414 | disabled = true; |
1415 | } | |
de9ac07b | 1416 | } |
5f9cf599 | 1417 | trigger_off(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1418 | trigger_off(&switch_output_trigger); |
de9ac07b | 1419 | |
f33cbe72 | 1420 | if (forks && workload_exec_errno) { |
35550da3 | 1421 | char msg[STRERR_BUFSIZE]; |
c8b5f2c9 | 1422 | const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); |
f33cbe72 ACM |
1423 | pr_err("Workload failed: %s\n", emsg); |
1424 | err = -1; | |
45604710 | 1425 | goto out_child; |
f33cbe72 ACM |
1426 | } |
1427 | ||
e3d59112 | 1428 | if (!quiet) |
45604710 | 1429 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
b44308f5 | 1430 | |
4ea648ae WN |
1431 | if (target__none(&rec->opts.target)) |
1432 | record__synthesize_workload(rec, true); | |
1433 | ||
45604710 | 1434 | out_child: |
d3d1af6f AB |
1435 | record__aio_mmap_read_sync(rec); |
1436 | ||
45604710 NK |
1437 | if (forks) { |
1438 | int exit_status; | |
addc2785 | 1439 | |
45604710 NK |
1440 | if (!child_finished) |
1441 | kill(rec->evlist->workload.pid, SIGTERM); | |
1442 | ||
1443 | wait(&exit_status); | |
1444 | ||
1445 | if (err < 0) | |
1446 | status = err; | |
1447 | else if (WIFEXITED(exit_status)) | |
1448 | status = WEXITSTATUS(exit_status); | |
1449 | else if (WIFSIGNALED(exit_status)) | |
1450 | signr = WTERMSIG(exit_status); | |
1451 | } else | |
1452 | status = err; | |
1453 | ||
4ea648ae | 1454 | record__synthesize(rec, true); |
e3d59112 NK |
1455 | /* this will be recalculated during process_buildids() */ |
1456 | rec->samples = 0; | |
1457 | ||
ecfd7a9c WN |
1458 | if (!err) { |
1459 | if (!rec->timestamp_filename) { | |
1460 | record__finish_output(rec); | |
1461 | } else { | |
1462 | fd = record__switch_output(rec, true); | |
1463 | if (fd < 0) { | |
1464 | status = fd; | |
1465 | goto out_delete_session; | |
1466 | } | |
1467 | } | |
1468 | } | |
39d17dac | 1469 | |
a074865e WN |
1470 | perf_hooks__invoke_record_end(); |
1471 | ||
e3d59112 NK |
1472 | if (!err && !quiet) { |
1473 | char samples[128]; | |
ecfd7a9c WN |
1474 | const char *postfix = rec->timestamp_filename ? |
1475 | ".<timestamp>" : ""; | |
e3d59112 | 1476 | |
ef149c25 | 1477 | if (rec->samples && !rec->opts.full_auxtrace) |
e3d59112 NK |
1478 | scnprintf(samples, sizeof(samples), |
1479 | " (%" PRIu64 " samples)", rec->samples); | |
1480 | else | |
1481 | samples[0] = '\0'; | |
1482 | ||
ecfd7a9c | 1483 | fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n", |
8ceb41d7 | 1484 | perf_data__size(data) / 1024.0 / 1024.0, |
2d4f2799 | 1485 | data->path, postfix, samples); |
e3d59112 NK |
1486 | } |
1487 | ||
39d17dac ACM |
1488 | out_delete_session: |
1489 | perf_session__delete(session); | |
45604710 | 1490 | return status; |
de9ac07b | 1491 | } |
0e9b20b8 | 1492 | |
0883e820 | 1493 | static void callchain_debug(struct callchain_param *callchain) |
09b0fd45 | 1494 | { |
aad2b21c | 1495 | static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; |
a601fdff | 1496 | |
0883e820 | 1497 | pr_debug("callchain: type %s\n", str[callchain->record_mode]); |
26d33022 | 1498 | |
0883e820 | 1499 | if (callchain->record_mode == CALLCHAIN_DWARF) |
09b0fd45 | 1500 | pr_debug("callchain: stack dump size %d\n", |
0883e820 | 1501 | callchain->dump_size); |
09b0fd45 JO |
1502 | } |
1503 | ||
0883e820 ACM |
1504 | int record_opts__parse_callchain(struct record_opts *record, |
1505 | struct callchain_param *callchain, | |
1506 | const char *arg, bool unset) | |
09b0fd45 | 1507 | { |
09b0fd45 | 1508 | int ret; |
0883e820 | 1509 | callchain->enabled = !unset; |
eb853e80 | 1510 | |
09b0fd45 JO |
1511 | /* --no-call-graph */ |
1512 | if (unset) { | |
0883e820 | 1513 | callchain->record_mode = CALLCHAIN_NONE; |
09b0fd45 JO |
1514 | pr_debug("callchain: disabled\n"); |
1515 | return 0; | |
1516 | } | |
1517 | ||
0883e820 | 1518 | ret = parse_callchain_record_opt(arg, callchain); |
5c0cf224 JO |
1519 | if (!ret) { |
1520 | /* Enable data address sampling for DWARF unwind. */ | |
0883e820 | 1521 | if (callchain->record_mode == CALLCHAIN_DWARF) |
5c0cf224 | 1522 | record->sample_address = true; |
0883e820 | 1523 | callchain_debug(callchain); |
5c0cf224 | 1524 | } |
26d33022 JO |
1525 | |
1526 | return ret; | |
1527 | } | |
1528 | ||
0883e820 ACM |
1529 | int record_parse_callchain_opt(const struct option *opt, |
1530 | const char *arg, | |
1531 | int unset) | |
1532 | { | |
1533 | return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset); | |
1534 | } | |
1535 | ||
c421e80b | 1536 | int record_callchain_opt(const struct option *opt, |
09b0fd45 JO |
1537 | const char *arg __maybe_unused, |
1538 | int unset __maybe_unused) | |
1539 | { | |
2ddd5c04 | 1540 | struct callchain_param *callchain = opt->value; |
c421e80b | 1541 | |
2ddd5c04 | 1542 | callchain->enabled = true; |
09b0fd45 | 1543 | |
2ddd5c04 ACM |
1544 | if (callchain->record_mode == CALLCHAIN_NONE) |
1545 | callchain->record_mode = CALLCHAIN_FP; | |
eb853e80 | 1546 | |
2ddd5c04 | 1547 | callchain_debug(callchain); |
09b0fd45 JO |
1548 | return 0; |
1549 | } | |
1550 | ||
eb853e80 JO |
1551 | static int perf_record_config(const char *var, const char *value, void *cb) |
1552 | { | |
7a29c087 NK |
1553 | struct record *rec = cb; |
1554 | ||
1555 | if (!strcmp(var, "record.build-id")) { | |
1556 | if (!strcmp(value, "cache")) | |
1557 | rec->no_buildid_cache = false; | |
1558 | else if (!strcmp(value, "no-cache")) | |
1559 | rec->no_buildid_cache = true; | |
1560 | else if (!strcmp(value, "skip")) | |
1561 | rec->no_buildid = true; | |
1562 | else | |
1563 | return -1; | |
1564 | return 0; | |
1565 | } | |
cff17205 YX |
1566 | if (!strcmp(var, "record.call-graph")) { |
1567 | var = "call-graph.record-mode"; | |
1568 | return perf_default_config(var, value, cb); | |
1569 | } | |
93f20c0f AB |
1570 | #ifdef HAVE_AIO_SUPPORT |
1571 | if (!strcmp(var, "record.aio")) { | |
1572 | rec->opts.nr_cblocks = strtol(value, NULL, 0); | |
1573 | if (!rec->opts.nr_cblocks) | |
1574 | rec->opts.nr_cblocks = nr_cblocks_default; | |
1575 | } | |
1576 | #endif | |
eb853e80 | 1577 | |
cff17205 | 1578 | return 0; |
eb853e80 JO |
1579 | } |
1580 | ||
814c8c38 PZ |
1581 | struct clockid_map { |
1582 | const char *name; | |
1583 | int clockid; | |
1584 | }; | |
1585 | ||
1586 | #define CLOCKID_MAP(n, c) \ | |
1587 | { .name = n, .clockid = (c), } | |
1588 | ||
1589 | #define CLOCKID_END { .name = NULL, } | |
1590 | ||
1591 | ||
1592 | /* | |
1593 | * Add the missing ones, we need to build on many distros... | |
1594 | */ | |
1595 | #ifndef CLOCK_MONOTONIC_RAW | |
1596 | #define CLOCK_MONOTONIC_RAW 4 | |
1597 | #endif | |
1598 | #ifndef CLOCK_BOOTTIME | |
1599 | #define CLOCK_BOOTTIME 7 | |
1600 | #endif | |
1601 | #ifndef CLOCK_TAI | |
1602 | #define CLOCK_TAI 11 | |
1603 | #endif | |
1604 | ||
1605 | static const struct clockid_map clockids[] = { | |
1606 | /* available for all events, NMI safe */ | |
1607 | CLOCKID_MAP("monotonic", CLOCK_MONOTONIC), | |
1608 | CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW), | |
1609 | ||
1610 | /* available for some events */ | |
1611 | CLOCKID_MAP("realtime", CLOCK_REALTIME), | |
1612 | CLOCKID_MAP("boottime", CLOCK_BOOTTIME), | |
1613 | CLOCKID_MAP("tai", CLOCK_TAI), | |
1614 | ||
1615 | /* available for the lazy */ | |
1616 | CLOCKID_MAP("mono", CLOCK_MONOTONIC), | |
1617 | CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW), | |
1618 | CLOCKID_MAP("real", CLOCK_REALTIME), | |
1619 | CLOCKID_MAP("boot", CLOCK_BOOTTIME), | |
1620 | ||
1621 | CLOCKID_END, | |
1622 | }; | |
1623 | ||
cf790516 AB |
1624 | static int get_clockid_res(clockid_t clk_id, u64 *res_ns) |
1625 | { | |
1626 | struct timespec res; | |
1627 | ||
1628 | *res_ns = 0; | |
1629 | if (!clock_getres(clk_id, &res)) | |
1630 | *res_ns = res.tv_nsec + res.tv_sec * NSEC_PER_SEC; | |
1631 | else | |
1632 | pr_warning("WARNING: Failed to determine specified clock resolution.\n"); | |
1633 | ||
1634 | return 0; | |
1635 | } | |
1636 | ||
814c8c38 PZ |
1637 | static int parse_clockid(const struct option *opt, const char *str, int unset) |
1638 | { | |
1639 | struct record_opts *opts = (struct record_opts *)opt->value; | |
1640 | const struct clockid_map *cm; | |
1641 | const char *ostr = str; | |
1642 | ||
1643 | if (unset) { | |
1644 | opts->use_clockid = 0; | |
1645 | return 0; | |
1646 | } | |
1647 | ||
1648 | /* no arg passed */ | |
1649 | if (!str) | |
1650 | return 0; | |
1651 | ||
1652 | /* no setting it twice */ | |
1653 | if (opts->use_clockid) | |
1654 | return -1; | |
1655 | ||
1656 | opts->use_clockid = true; | |
1657 | ||
1658 | /* if its a number, we're done */ | |
1659 | if (sscanf(str, "%d", &opts->clockid) == 1) | |
cf790516 | 1660 | return get_clockid_res(opts->clockid, &opts->clockid_res_ns); |
814c8c38 PZ |
1661 | |
1662 | /* allow a "CLOCK_" prefix to the name */ | |
1663 | if (!strncasecmp(str, "CLOCK_", 6)) | |
1664 | str += 6; | |
1665 | ||
1666 | for (cm = clockids; cm->name; cm++) { | |
1667 | if (!strcasecmp(str, cm->name)) { | |
1668 | opts->clockid = cm->clockid; | |
cf790516 AB |
1669 | return get_clockid_res(opts->clockid, |
1670 | &opts->clockid_res_ns); | |
814c8c38 PZ |
1671 | } |
1672 | } | |
1673 | ||
1674 | opts->use_clockid = false; | |
1675 | ui__warning("unknown clockid %s, check man page\n", ostr); | |
1676 | return -1; | |
1677 | } | |
1678 | ||
f4fe11b7 AB |
1679 | static int record__parse_affinity(const struct option *opt, const char *str, int unset) |
1680 | { | |
1681 | struct record_opts *opts = (struct record_opts *)opt->value; | |
1682 | ||
1683 | if (unset || !str) | |
1684 | return 0; | |
1685 | ||
1686 | if (!strcasecmp(str, "node")) | |
1687 | opts->affinity = PERF_AFFINITY_NODE; | |
1688 | else if (!strcasecmp(str, "cpu")) | |
1689 | opts->affinity = PERF_AFFINITY_CPU; | |
1690 | ||
1691 | return 0; | |
1692 | } | |
1693 | ||
e9db1310 AH |
1694 | static int record__parse_mmap_pages(const struct option *opt, |
1695 | const char *str, | |
1696 | int unset __maybe_unused) | |
1697 | { | |
1698 | struct record_opts *opts = opt->value; | |
1699 | char *s, *p; | |
1700 | unsigned int mmap_pages; | |
1701 | int ret; | |
1702 | ||
1703 | if (!str) | |
1704 | return -EINVAL; | |
1705 | ||
1706 | s = strdup(str); | |
1707 | if (!s) | |
1708 | return -ENOMEM; | |
1709 | ||
1710 | p = strchr(s, ','); | |
1711 | if (p) | |
1712 | *p = '\0'; | |
1713 | ||
1714 | if (*s) { | |
1715 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s); | |
1716 | if (ret) | |
1717 | goto out_free; | |
1718 | opts->mmap_pages = mmap_pages; | |
1719 | } | |
1720 | ||
1721 | if (!p) { | |
1722 | ret = 0; | |
1723 | goto out_free; | |
1724 | } | |
1725 | ||
1726 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1); | |
1727 | if (ret) | |
1728 | goto out_free; | |
1729 | ||
1730 | opts->auxtrace_mmap_pages = mmap_pages; | |
1731 | ||
1732 | out_free: | |
1733 | free(s); | |
1734 | return ret; | |
1735 | } | |
1736 | ||
0c582449 JO |
1737 | static void switch_output_size_warn(struct record *rec) |
1738 | { | |
1739 | u64 wakeup_size = perf_evlist__mmap_size(rec->opts.mmap_pages); | |
1740 | struct switch_output *s = &rec->switch_output; | |
1741 | ||
1742 | wakeup_size /= 2; | |
1743 | ||
1744 | if (s->size < wakeup_size) { | |
1745 | char buf[100]; | |
1746 | ||
1747 | unit_number__scnprintf(buf, sizeof(buf), wakeup_size); | |
1748 | pr_warning("WARNING: switch-output data size lower than " | |
1749 | "wakeup kernel buffer size (%s) " | |
1750 | "expect bigger perf.data sizes\n", buf); | |
1751 | } | |
1752 | } | |
1753 | ||
cb4e1ebb JO |
1754 | static int switch_output_setup(struct record *rec) |
1755 | { | |
1756 | struct switch_output *s = &rec->switch_output; | |
dc0c6127 JO |
1757 | static struct parse_tag tags_size[] = { |
1758 | { .tag = 'B', .mult = 1 }, | |
1759 | { .tag = 'K', .mult = 1 << 10 }, | |
1760 | { .tag = 'M', .mult = 1 << 20 }, | |
1761 | { .tag = 'G', .mult = 1 << 30 }, | |
1762 | { .tag = 0 }, | |
1763 | }; | |
bfacbe3b JO |
1764 | static struct parse_tag tags_time[] = { |
1765 | { .tag = 's', .mult = 1 }, | |
1766 | { .tag = 'm', .mult = 60 }, | |
1767 | { .tag = 'h', .mult = 60*60 }, | |
1768 | { .tag = 'd', .mult = 60*60*24 }, | |
1769 | { .tag = 0 }, | |
1770 | }; | |
dc0c6127 | 1771 | unsigned long val; |
cb4e1ebb JO |
1772 | |
1773 | if (!s->set) | |
1774 | return 0; | |
1775 | ||
1776 | if (!strcmp(s->str, "signal")) { | |
1777 | s->signal = true; | |
1778 | pr_debug("switch-output with SIGUSR2 signal\n"); | |
dc0c6127 JO |
1779 | goto enabled; |
1780 | } | |
1781 | ||
1782 | val = parse_tag_value(s->str, tags_size); | |
1783 | if (val != (unsigned long) -1) { | |
1784 | s->size = val; | |
1785 | pr_debug("switch-output with %s size threshold\n", s->str); | |
1786 | goto enabled; | |
cb4e1ebb JO |
1787 | } |
1788 | ||
bfacbe3b JO |
1789 | val = parse_tag_value(s->str, tags_time); |
1790 | if (val != (unsigned long) -1) { | |
1791 | s->time = val; | |
1792 | pr_debug("switch-output with %s time threshold (%lu seconds)\n", | |
1793 | s->str, s->time); | |
1794 | goto enabled; | |
1795 | } | |
1796 | ||
cb4e1ebb | 1797 | return -1; |
dc0c6127 JO |
1798 | |
1799 | enabled: | |
1800 | rec->timestamp_filename = true; | |
1801 | s->enabled = true; | |
0c582449 JO |
1802 | |
1803 | if (s->size && !rec->opts.no_buffering) | |
1804 | switch_output_size_warn(rec); | |
1805 | ||
dc0c6127 | 1806 | return 0; |
cb4e1ebb JO |
1807 | } |
1808 | ||
e5b2c207 | 1809 | static const char * const __record_usage[] = { |
9e096753 MG |
1810 | "perf record [<options>] [<command>]", |
1811 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
1812 | NULL |
1813 | }; | |
e5b2c207 | 1814 | const char * const *record_usage = __record_usage; |
0e9b20b8 | 1815 | |
d20deb64 | 1816 | /* |
8c6f45a7 ACM |
1817 | * XXX Ideally would be local to cmd_record() and passed to a record__new |
1818 | * because we need to have access to it in record__exit, that is called | |
d20deb64 ACM |
1819 | * after cmd_record() exits, but since record_options need to be accessible to |
1820 | * builtin-script, leave it here. | |
1821 | * | |
1822 | * At least we don't ouch it in all the other functions here directly. | |
1823 | * | |
1824 | * Just say no to tons of global variables, sigh. | |
1825 | */ | |
8c6f45a7 | 1826 | static struct record record = { |
d20deb64 | 1827 | .opts = { |
8affc2b8 | 1828 | .sample_time = true, |
d20deb64 ACM |
1829 | .mmap_pages = UINT_MAX, |
1830 | .user_freq = UINT_MAX, | |
1831 | .user_interval = ULLONG_MAX, | |
447a6013 | 1832 | .freq = 4000, |
d1cb9fce NK |
1833 | .target = { |
1834 | .uses_mmap = true, | |
3aa5939d | 1835 | .default_per_cpu = true, |
d1cb9fce | 1836 | }, |
d20deb64 | 1837 | }, |
e3d59112 NK |
1838 | .tool = { |
1839 | .sample = process_sample_event, | |
1840 | .fork = perf_event__process_fork, | |
cca8482c | 1841 | .exit = perf_event__process_exit, |
e3d59112 | 1842 | .comm = perf_event__process_comm, |
f3b3614a | 1843 | .namespaces = perf_event__process_namespaces, |
e3d59112 NK |
1844 | .mmap = perf_event__process_mmap, |
1845 | .mmap2 = perf_event__process_mmap2, | |
cca8482c | 1846 | .ordered_events = true, |
e3d59112 | 1847 | }, |
d20deb64 | 1848 | }; |
7865e817 | 1849 | |
76a26549 NK |
1850 | const char record_callchain_help[] = CALLCHAIN_RECORD_HELP |
1851 | "\n\t\t\t\tDefault: fp"; | |
61eaa3be | 1852 | |
0aab2136 WN |
1853 | static bool dry_run; |
1854 | ||
d20deb64 ACM |
1855 | /* |
1856 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
1857 | * with it and switch to use the library functions in perf_evlist that came | |
b4006796 | 1858 | * from builtin-record.c, i.e. use record_opts, |
d20deb64 ACM |
1859 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', |
1860 | * using pipes, etc. | |
1861 | */ | |
efd21307 | 1862 | static struct option __record_options[] = { |
d20deb64 | 1863 | OPT_CALLBACK('e', "event", &record.evlist, "event", |
86847b62 | 1864 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 1865 | parse_events_option), |
d20deb64 | 1866 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
c171b552 | 1867 | "event filter", parse_filter), |
4ba1faa1 WN |
1868 | OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist, |
1869 | NULL, "don't record events from perf itself", | |
1870 | exclude_perf), | |
bea03405 | 1871 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", |
d6d901c2 | 1872 | "record events on existing process id"), |
bea03405 | 1873 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", |
d6d901c2 | 1874 | "record events on existing thread id"), |
d20deb64 | 1875 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
0e9b20b8 | 1876 | "collect data with this RT SCHED_FIFO priority"), |
509051ea | 1877 | OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering, |
acac03fa | 1878 | "collect data without buffering"), |
d20deb64 | 1879 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
daac07b2 | 1880 | "collect raw sample records from all opened counters"), |
bea03405 | 1881 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, |
0e9b20b8 | 1882 | "system-wide collection from all CPUs"), |
bea03405 | 1883 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", |
c45c6ea2 | 1884 | "list of cpus to monitor"), |
d20deb64 | 1885 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
2d4f2799 | 1886 | OPT_STRING('o', "output", &record.data.path, "file", |
abaff32a | 1887 | "output file name"), |
69e7e5b0 AH |
1888 | OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit, |
1889 | &record.opts.no_inherit_set, | |
1890 | "child tasks do not inherit counters"), | |
4ea648ae WN |
1891 | OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize, |
1892 | "synthesize non-sample events at the end of output"), | |
626a6b78 | 1893 | OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"), |
71184c6a | 1894 | OPT_BOOLEAN(0, "no-bpf-event", &record.opts.no_bpf_event, "record bpf events"), |
b09c2364 ACM |
1895 | OPT_BOOLEAN(0, "strict-freq", &record.opts.strict_freq, |
1896 | "Fail if the specified frequency can't be used"), | |
67230479 ACM |
1897 | OPT_CALLBACK('F', "freq", &record.opts, "freq or 'max'", |
1898 | "profile at this frequency", | |
1899 | record__parse_freq), | |
e9db1310 AH |
1900 | OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]", |
1901 | "number of mmap data pages and AUX area tracing mmap pages", | |
1902 | record__parse_mmap_pages), | |
d20deb64 | 1903 | OPT_BOOLEAN(0, "group", &record.opts.group, |
43bece79 | 1904 | "put the counters into a counter group"), |
2ddd5c04 | 1905 | OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, |
09b0fd45 JO |
1906 | NULL, "enables call-graph recording" , |
1907 | &record_callchain_opt), | |
1908 | OPT_CALLBACK(0, "call-graph", &record.opts, | |
76a26549 | 1909 | "record_mode[,record_size]", record_callchain_help, |
09b0fd45 | 1910 | &record_parse_callchain_opt), |
c0555642 | 1911 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 1912 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 1913 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
d20deb64 | 1914 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
649c48a9 | 1915 | "per thread counts"), |
56100321 | 1916 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"), |
3b0a5daa KL |
1917 | OPT_BOOLEAN(0, "phys-data", &record.opts.sample_phys_addr, |
1918 | "Record the sample physical addresses"), | |
b6f35ed7 | 1919 | OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"), |
3abebc55 AH |
1920 | OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time, |
1921 | &record.opts.sample_time_set, | |
1922 | "Record the sample timestamps"), | |
f290aa1f JO |
1923 | OPT_BOOLEAN_SET('P', "period", &record.opts.period, &record.opts.period_set, |
1924 | "Record the sample period"), | |
d20deb64 | 1925 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, |
649c48a9 | 1926 | "don't sample"), |
d2db9a98 WN |
1927 | OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache, |
1928 | &record.no_buildid_cache_set, | |
1929 | "do not update the buildid cache"), | |
1930 | OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid, | |
1931 | &record.no_buildid_set, | |
1932 | "do not collect buildids in perf.data"), | |
d20deb64 | 1933 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
023695d9 SE |
1934 | "monitor event in cgroup name only", |
1935 | parse_cgroups), | |
a6205a35 | 1936 | OPT_UINTEGER('D', "delay", &record.opts.initial_delay, |
6619a53e | 1937 | "ms to wait before starting measurement after program start"), |
bea03405 NK |
1938 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", |
1939 | "user to profile"), | |
a5aabdac SE |
1940 | |
1941 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, | |
1942 | "branch any", "sample any taken branches", | |
1943 | parse_branch_stack), | |
1944 | ||
1945 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, | |
1946 | "branch filter mask", "branch stack filter modes", | |
bdfebd84 | 1947 | parse_branch_stack), |
05484298 AK |
1948 | OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, |
1949 | "sample by weight (on special events only)"), | |
475eeab9 AK |
1950 | OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction, |
1951 | "sample transaction flags (special events only)"), | |
3aa5939d AH |
1952 | OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, |
1953 | "use per-thread mmaps"), | |
bcc84ec6 SE |
1954 | OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register", |
1955 | "sample selected machine registers on interrupt," | |
1956 | " use -I ? to list register names", parse_regs), | |
84c41742 AK |
1957 | OPT_CALLBACK_OPTARG(0, "user-regs", &record.opts.sample_user_regs, NULL, "any register", |
1958 | "sample selected machine registers on interrupt," | |
1959 | " use -I ? to list register names", parse_regs), | |
85c273d2 AK |
1960 | OPT_BOOLEAN(0, "running-time", &record.opts.running_time, |
1961 | "Record running/enabled time of read (:S) events"), | |
814c8c38 PZ |
1962 | OPT_CALLBACK('k', "clockid", &record.opts, |
1963 | "clockid", "clockid to use for events, see clock_gettime()", | |
1964 | parse_clockid), | |
2dd6d8a1 AH |
1965 | OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts, |
1966 | "opts", "AUX area tracing Snapshot Mode", ""), | |
3fcb10e4 | 1967 | OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, |
9d9cad76 | 1968 | "per thread proc mmap processing timeout in ms"), |
f3b3614a HB |
1969 | OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces, |
1970 | "Record namespaces events"), | |
b757bb09 AH |
1971 | OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events, |
1972 | "Record context switch events"), | |
85723885 JO |
1973 | OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel, |
1974 | "Configure all used events to run in kernel space.", | |
1975 | PARSE_OPT_EXCLUSIVE), | |
1976 | OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user, | |
1977 | "Configure all used events to run in user space.", | |
1978 | PARSE_OPT_EXCLUSIVE), | |
71dc2326 WN |
1979 | OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path", |
1980 | "clang binary to use for compiling BPF scriptlets"), | |
1981 | OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options", | |
1982 | "options passed to clang when compiling BPF scriptlets"), | |
7efe0e03 HK |
1983 | OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name, |
1984 | "file", "vmlinux pathname"), | |
6156681b NK |
1985 | OPT_BOOLEAN(0, "buildid-all", &record.buildid_all, |
1986 | "Record build-id of all DSOs regardless of hits"), | |
ecfd7a9c WN |
1987 | OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, |
1988 | "append timestamp to output filename"), | |
68588baf JY |
1989 | OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary, |
1990 | "Record timestamp boundary (time of first/last samples)"), | |
cb4e1ebb | 1991 | OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str, |
c38dab7d AK |
1992 | &record.switch_output.set, "signal or size[BKMG] or time[smhd]", |
1993 | "Switch output when receiving SIGUSR2 (signal) or cross a size or time threshold", | |
dc0c6127 | 1994 | "signal"), |
03724b2e AK |
1995 | OPT_INTEGER(0, "switch-max-files", &record.switch_output.num_files, |
1996 | "Limit number of switch output generated files"), | |
0aab2136 WN |
1997 | OPT_BOOLEAN(0, "dry-run", &dry_run, |
1998 | "Parse options then exit"), | |
d3d1af6f | 1999 | #ifdef HAVE_AIO_SUPPORT |
93f20c0f AB |
2000 | OPT_CALLBACK_OPTARG(0, "aio", &record.opts, |
2001 | &nr_cblocks_default, "n", "Use <n> control blocks in asynchronous trace writing mode (default: 1, max: 4)", | |
d3d1af6f AB |
2002 | record__aio_parse), |
2003 | #endif | |
f4fe11b7 AB |
2004 | OPT_CALLBACK(0, "affinity", &record.opts, "node|cpu", |
2005 | "Set affinity mask of trace reading thread to NUMA node cpu mask or cpu of processed mmap buffer", | |
2006 | record__parse_affinity), | |
0e9b20b8 IM |
2007 | OPT_END() |
2008 | }; | |
2009 | ||
e5b2c207 NK |
2010 | struct option *record_options = __record_options; |
2011 | ||
b0ad8ea6 | 2012 | int cmd_record(int argc, const char **argv) |
0e9b20b8 | 2013 | { |
ef149c25 | 2014 | int err; |
8c6f45a7 | 2015 | struct record *rec = &record; |
16ad2ffb | 2016 | char errbuf[BUFSIZ]; |
0e9b20b8 | 2017 | |
67230479 ACM |
2018 | setlocale(LC_ALL, ""); |
2019 | ||
48e1cab1 WN |
2020 | #ifndef HAVE_LIBBPF_SUPPORT |
2021 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c) | |
2022 | set_nobuild('\0', "clang-path", true); | |
2023 | set_nobuild('\0', "clang-opt", true); | |
2024 | # undef set_nobuild | |
7efe0e03 HK |
2025 | #endif |
2026 | ||
2027 | #ifndef HAVE_BPF_PROLOGUE | |
2028 | # if !defined (HAVE_DWARF_SUPPORT) | |
2029 | # define REASON "NO_DWARF=1" | |
2030 | # elif !defined (HAVE_LIBBPF_SUPPORT) | |
2031 | # define REASON "NO_LIBBPF=1" | |
2032 | # else | |
2033 | # define REASON "this architecture doesn't support BPF prologue" | |
2034 | # endif | |
2035 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c) | |
2036 | set_nobuild('\0', "vmlinux", true); | |
2037 | # undef set_nobuild | |
2038 | # undef REASON | |
48e1cab1 WN |
2039 | #endif |
2040 | ||
9d2ed645 AB |
2041 | CPU_ZERO(&rec->affinity_mask); |
2042 | rec->opts.affinity = PERF_AFFINITY_SYS; | |
2043 | ||
3e2be2da ACM |
2044 | rec->evlist = perf_evlist__new(); |
2045 | if (rec->evlist == NULL) | |
361c99a6 ACM |
2046 | return -ENOMEM; |
2047 | ||
ecc4c561 ACM |
2048 | err = perf_config(perf_record_config, rec); |
2049 | if (err) | |
2050 | return err; | |
eb853e80 | 2051 | |
bca647aa | 2052 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 2053 | PARSE_OPT_STOP_AT_NON_OPTION); |
68ba3235 NK |
2054 | if (quiet) |
2055 | perf_quiet_option(); | |
483635a9 JO |
2056 | |
2057 | /* Make system wide (-a) the default target. */ | |
602ad878 | 2058 | if (!argc && target__none(&rec->opts.target)) |
483635a9 | 2059 | rec->opts.target.system_wide = true; |
0e9b20b8 | 2060 | |
bea03405 | 2061 | if (nr_cgroups && !rec->opts.target.system_wide) { |
c7118369 NK |
2062 | usage_with_options_msg(record_usage, record_options, |
2063 | "cgroup monitoring only available in system-wide mode"); | |
2064 | ||
023695d9 | 2065 | } |
b757bb09 AH |
2066 | if (rec->opts.record_switch_events && |
2067 | !perf_can_record_switch_events()) { | |
c7118369 NK |
2068 | ui__error("kernel does not support recording context switch events\n"); |
2069 | parse_options_usage(record_usage, record_options, "switch-events", 0); | |
2070 | return -EINVAL; | |
b757bb09 | 2071 | } |
023695d9 | 2072 | |
cb4e1ebb JO |
2073 | if (switch_output_setup(rec)) { |
2074 | parse_options_usage(record_usage, record_options, "switch-output", 0); | |
2075 | return -EINVAL; | |
2076 | } | |
2077 | ||
bfacbe3b JO |
2078 | if (rec->switch_output.time) { |
2079 | signal(SIGALRM, alarm_sig_handler); | |
2080 | alarm(rec->switch_output.time); | |
2081 | } | |
2082 | ||
03724b2e AK |
2083 | if (rec->switch_output.num_files) { |
2084 | rec->switch_output.filenames = calloc(sizeof(char *), | |
2085 | rec->switch_output.num_files); | |
2086 | if (!rec->switch_output.filenames) | |
2087 | return -EINVAL; | |
2088 | } | |
2089 | ||
1b36c03e AH |
2090 | /* |
2091 | * Allow aliases to facilitate the lookup of symbols for address | |
2092 | * filters. Refer to auxtrace_parse_filters(). | |
2093 | */ | |
2094 | symbol_conf.allow_aliases = true; | |
2095 | ||
2096 | symbol__init(NULL); | |
2097 | ||
4b5ea3bd | 2098 | err = record__auxtrace_init(rec); |
1b36c03e AH |
2099 | if (err) |
2100 | goto out; | |
2101 | ||
0aab2136 | 2102 | if (dry_run) |
5c01ad60 | 2103 | goto out; |
0aab2136 | 2104 | |
d7888573 WN |
2105 | err = bpf__setup_stdout(rec->evlist); |
2106 | if (err) { | |
2107 | bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf)); | |
2108 | pr_err("ERROR: Setup BPF stdout failed: %s\n", | |
2109 | errbuf); | |
5c01ad60 | 2110 | goto out; |
d7888573 WN |
2111 | } |
2112 | ||
ef149c25 AH |
2113 | err = -ENOMEM; |
2114 | ||
6c443954 | 2115 | if (symbol_conf.kptr_restrict && !perf_evlist__exclude_kernel(rec->evlist)) |
646aaea6 ACM |
2116 | pr_warning( |
2117 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
2118 | "check /proc/sys/kernel/kptr_restrict.\n\n" | |
2119 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
2120 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
2121 | "Samples in kernel modules won't be resolved at all.\n\n" | |
2122 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
2123 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
ec80fde7 | 2124 | |
0c1d46a8 | 2125 | if (rec->no_buildid_cache || rec->no_buildid) { |
a1ac1d3c | 2126 | disable_buildid_cache(); |
dc0c6127 | 2127 | } else if (rec->switch_output.enabled) { |
0c1d46a8 WN |
2128 | /* |
2129 | * In 'perf record --switch-output', disable buildid | |
2130 | * generation by default to reduce data file switching | |
2131 | * overhead. Still generate buildid if they are required | |
2132 | * explicitly using | |
2133 | * | |
60437ac0 | 2134 | * perf record --switch-output --no-no-buildid \ |
0c1d46a8 WN |
2135 | * --no-no-buildid-cache |
2136 | * | |
2137 | * Following code equals to: | |
2138 | * | |
2139 | * if ((rec->no_buildid || !rec->no_buildid_set) && | |
2140 | * (rec->no_buildid_cache || !rec->no_buildid_cache_set)) | |
2141 | * disable_buildid_cache(); | |
2142 | */ | |
2143 | bool disable = true; | |
2144 | ||
2145 | if (rec->no_buildid_set && !rec->no_buildid) | |
2146 | disable = false; | |
2147 | if (rec->no_buildid_cache_set && !rec->no_buildid_cache) | |
2148 | disable = false; | |
2149 | if (disable) { | |
2150 | rec->no_buildid = true; | |
2151 | rec->no_buildid_cache = true; | |
2152 | disable_buildid_cache(); | |
2153 | } | |
2154 | } | |
655000e7 | 2155 | |
4ea648ae WN |
2156 | if (record.opts.overwrite) |
2157 | record.opts.tail_synthesize = true; | |
2158 | ||
3e2be2da | 2159 | if (rec->evlist->nr_entries == 0 && |
4b4cd503 | 2160 | __perf_evlist__add_default(rec->evlist, !record.opts.no_samples) < 0) { |
69aad6f1 | 2161 | pr_err("Not enough memory for event selector list\n"); |
394c01ed | 2162 | goto out; |
bbd36e5e | 2163 | } |
0e9b20b8 | 2164 | |
69e7e5b0 AH |
2165 | if (rec->opts.target.tid && !rec->opts.no_inherit_set) |
2166 | rec->opts.no_inherit = true; | |
2167 | ||
602ad878 | 2168 | err = target__validate(&rec->opts.target); |
16ad2ffb | 2169 | if (err) { |
602ad878 | 2170 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
c3dec27b | 2171 | ui__warning("%s\n", errbuf); |
16ad2ffb NK |
2172 | } |
2173 | ||
602ad878 | 2174 | err = target__parse_uid(&rec->opts.target); |
16ad2ffb NK |
2175 | if (err) { |
2176 | int saved_errno = errno; | |
4bd0f2d2 | 2177 | |
602ad878 | 2178 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
3780f488 | 2179 | ui__error("%s", errbuf); |
16ad2ffb NK |
2180 | |
2181 | err = -saved_errno; | |
394c01ed | 2182 | goto out; |
16ad2ffb | 2183 | } |
0d37aa34 | 2184 | |
ca800068 MZ |
2185 | /* Enable ignoring missing threads when -u/-p option is defined. */ |
2186 | rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX || rec->opts.target.pid; | |
23dc4f15 | 2187 | |
16ad2ffb | 2188 | err = -ENOMEM; |
3e2be2da | 2189 | if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0) |
dd7927f4 | 2190 | usage_with_options(record_usage, record_options); |
69aad6f1 | 2191 | |
ef149c25 AH |
2192 | err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts); |
2193 | if (err) | |
394c01ed | 2194 | goto out; |
ef149c25 | 2195 | |
6156681b NK |
2196 | /* |
2197 | * We take all buildids when the file contains | |
2198 | * AUX area tracing data because we do not decode the | |
2199 | * trace because it would take too long. | |
2200 | */ | |
2201 | if (rec->opts.full_auxtrace) | |
2202 | rec->buildid_all = true; | |
2203 | ||
b4006796 | 2204 | if (record_opts__config(&rec->opts)) { |
39d17dac | 2205 | err = -EINVAL; |
394c01ed | 2206 | goto out; |
7e4ff9e3 MG |
2207 | } |
2208 | ||
93f20c0f AB |
2209 | if (rec->opts.nr_cblocks > nr_cblocks_max) |
2210 | rec->opts.nr_cblocks = nr_cblocks_max; | |
d3d1af6f AB |
2211 | if (verbose > 0) |
2212 | pr_info("nr_cblocks: %d\n", rec->opts.nr_cblocks); | |
2213 | ||
9d2ed645 AB |
2214 | pr_debug("affinity: %s\n", affinity_tags[rec->opts.affinity]); |
2215 | ||
d20deb64 | 2216 | err = __cmd_record(&record, argc, argv); |
394c01ed | 2217 | out: |
45604710 | 2218 | perf_evlist__delete(rec->evlist); |
d65a458b | 2219 | symbol__exit(); |
ef149c25 | 2220 | auxtrace_record__free(rec->itr); |
39d17dac | 2221 | return err; |
0e9b20b8 | 2222 | } |
2dd6d8a1 AH |
2223 | |
2224 | static void snapshot_sig_handler(int sig __maybe_unused) | |
2225 | { | |
dc0c6127 JO |
2226 | struct record *rec = &record; |
2227 | ||
5f9cf599 WN |
2228 | if (trigger_is_ready(&auxtrace_snapshot_trigger)) { |
2229 | trigger_hit(&auxtrace_snapshot_trigger); | |
2230 | auxtrace_record__snapshot_started = 1; | |
2231 | if (auxtrace_record__snapshot_start(record.itr)) | |
2232 | trigger_error(&auxtrace_snapshot_trigger); | |
2233 | } | |
3c1cb7e3 | 2234 | |
dc0c6127 | 2235 | if (switch_output_signal(rec)) |
3c1cb7e3 | 2236 | trigger_hit(&switch_output_trigger); |
2dd6d8a1 | 2237 | } |
bfacbe3b JO |
2238 | |
2239 | static void alarm_sig_handler(int sig __maybe_unused) | |
2240 | { | |
2241 | struct record *rec = &record; | |
2242 | ||
2243 | if (switch_output_time(rec)) | |
2244 | trigger_hit(&switch_output_trigger); | |
2245 | } |