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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" |
5d8bb1ec | 26 | #include "util/drv_configs.h" |
94c744b6 | 27 | #include "util/session.h" |
45694aa7 | 28 | #include "util/tool.h" |
8d06367f | 29 | #include "util/symbol.h" |
a12b51c4 | 30 | #include "util/cpumap.h" |
fd78260b | 31 | #include "util/thread_map.h" |
f5fc1412 | 32 | #include "util/data.h" |
bcc84ec6 | 33 | #include "util/perf_regs.h" |
ef149c25 | 34 | #include "util/auxtrace.h" |
46bc29b9 | 35 | #include "util/tsc.h" |
f00898f4 | 36 | #include "util/parse-branch-options.h" |
bcc84ec6 | 37 | #include "util/parse-regs-options.h" |
71dc2326 | 38 | #include "util/llvm-utils.h" |
8690a2a7 | 39 | #include "util/bpf-loader.h" |
5f9cf599 | 40 | #include "util/trigger.h" |
a074865e | 41 | #include "util/perf-hooks.h" |
c5e4027e | 42 | #include "util/time-utils.h" |
58db1d6e | 43 | #include "util/units.h" |
d8871ea7 | 44 | #include "asm/bug.h" |
7c6a1c65 | 45 | |
a43783ae | 46 | #include <errno.h> |
fd20e811 | 47 | #include <inttypes.h> |
67230479 | 48 | #include <locale.h> |
4208735d | 49 | #include <poll.h> |
97124d5e | 50 | #include <unistd.h> |
de9ac07b | 51 | #include <sched.h> |
9607ad3a | 52 | #include <signal.h> |
a41794cd | 53 | #include <sys/mman.h> |
4208735d | 54 | #include <sys/wait.h> |
0693e680 | 55 | #include <linux/time64.h> |
78da39fa | 56 | |
1b43b704 | 57 | struct switch_output { |
dc0c6127 | 58 | bool enabled; |
1b43b704 | 59 | bool signal; |
dc0c6127 | 60 | unsigned long size; |
bfacbe3b | 61 | unsigned long time; |
cb4e1ebb JO |
62 | const char *str; |
63 | bool set; | |
1b43b704 JO |
64 | }; |
65 | ||
8c6f45a7 | 66 | struct record { |
45694aa7 | 67 | struct perf_tool tool; |
b4006796 | 68 | struct record_opts opts; |
d20deb64 | 69 | u64 bytes_written; |
8ceb41d7 | 70 | struct perf_data data; |
ef149c25 | 71 | struct auxtrace_record *itr; |
d20deb64 ACM |
72 | struct perf_evlist *evlist; |
73 | struct perf_session *session; | |
d20deb64 | 74 | int realtime_prio; |
d20deb64 | 75 | bool no_buildid; |
d2db9a98 | 76 | bool no_buildid_set; |
d20deb64 | 77 | bool no_buildid_cache; |
d2db9a98 | 78 | bool no_buildid_cache_set; |
6156681b | 79 | bool buildid_all; |
ecfd7a9c | 80 | bool timestamp_filename; |
68588baf | 81 | bool timestamp_boundary; |
1b43b704 | 82 | struct switch_output switch_output; |
9f065194 | 83 | unsigned long long samples; |
0f82ebc4 | 84 | }; |
a21ca2ca | 85 | |
dc0c6127 JO |
86 | static volatile int auxtrace_record__snapshot_started; |
87 | static DEFINE_TRIGGER(auxtrace_snapshot_trigger); | |
88 | static DEFINE_TRIGGER(switch_output_trigger); | |
89 | ||
90 | static bool switch_output_signal(struct record *rec) | |
91 | { | |
92 | return rec->switch_output.signal && | |
93 | trigger_is_ready(&switch_output_trigger); | |
94 | } | |
95 | ||
96 | static bool switch_output_size(struct record *rec) | |
97 | { | |
98 | return rec->switch_output.size && | |
99 | trigger_is_ready(&switch_output_trigger) && | |
100 | (rec->bytes_written >= rec->switch_output.size); | |
101 | } | |
102 | ||
bfacbe3b JO |
103 | static bool switch_output_time(struct record *rec) |
104 | { | |
105 | return rec->switch_output.time && | |
106 | trigger_is_ready(&switch_output_trigger); | |
107 | } | |
108 | ||
ded2b8fe JO |
109 | static int record__write(struct record *rec, struct perf_mmap *map __maybe_unused, |
110 | void *bf, size_t size) | |
f5970550 | 111 | { |
ded2b8fe JO |
112 | struct perf_data_file *file = &rec->session->data->file; |
113 | ||
114 | if (perf_data_file__write(file, bf, size) < 0) { | |
50a9b868 JO |
115 | pr_err("failed to write perf data, error: %m\n"); |
116 | return -1; | |
f5970550 | 117 | } |
8d3eca20 | 118 | |
cf8b2e69 | 119 | rec->bytes_written += size; |
dc0c6127 JO |
120 | |
121 | if (switch_output_size(rec)) | |
122 | trigger_hit(&switch_output_trigger); | |
123 | ||
8d3eca20 | 124 | return 0; |
f5970550 PZ |
125 | } |
126 | ||
45694aa7 | 127 | static int process_synthesized_event(struct perf_tool *tool, |
d20deb64 | 128 | union perf_event *event, |
1d037ca1 IT |
129 | struct perf_sample *sample __maybe_unused, |
130 | struct machine *machine __maybe_unused) | |
234fbbf5 | 131 | { |
8c6f45a7 | 132 | struct record *rec = container_of(tool, struct record, tool); |
ded2b8fe | 133 | return record__write(rec, NULL, event, event->header.size); |
234fbbf5 ACM |
134 | } |
135 | ||
ded2b8fe | 136 | static int record__pushfn(struct perf_mmap *map, void *to, void *bf, size_t size) |
d37f1586 ACM |
137 | { |
138 | struct record *rec = to; | |
139 | ||
140 | rec->samples++; | |
ded2b8fe | 141 | return record__write(rec, map, bf, size); |
d37f1586 ACM |
142 | } |
143 | ||
2dd6d8a1 AH |
144 | static volatile int done; |
145 | static volatile int signr = -1; | |
146 | static volatile int child_finished; | |
c0bdc1c4 | 147 | |
2dd6d8a1 AH |
148 | static void sig_handler(int sig) |
149 | { | |
150 | if (sig == SIGCHLD) | |
151 | child_finished = 1; | |
152 | else | |
153 | signr = sig; | |
154 | ||
155 | done = 1; | |
156 | } | |
157 | ||
a074865e WN |
158 | static void sigsegv_handler(int sig) |
159 | { | |
160 | perf_hooks__recover(); | |
161 | sighandler_dump_stack(sig); | |
162 | } | |
163 | ||
2dd6d8a1 AH |
164 | static void record__sig_exit(void) |
165 | { | |
166 | if (signr == -1) | |
167 | return; | |
168 | ||
169 | signal(signr, SIG_DFL); | |
170 | raise(signr); | |
171 | } | |
172 | ||
e31f0d01 AH |
173 | #ifdef HAVE_AUXTRACE_SUPPORT |
174 | ||
ef149c25 | 175 | static int record__process_auxtrace(struct perf_tool *tool, |
ded2b8fe | 176 | struct perf_mmap *map, |
ef149c25 AH |
177 | union perf_event *event, void *data1, |
178 | size_t len1, void *data2, size_t len2) | |
179 | { | |
180 | struct record *rec = container_of(tool, struct record, tool); | |
8ceb41d7 | 181 | struct perf_data *data = &rec->data; |
ef149c25 AH |
182 | size_t padding; |
183 | u8 pad[8] = {0}; | |
184 | ||
8ceb41d7 | 185 | if (!perf_data__is_pipe(data)) { |
99fa2984 | 186 | off_t file_offset; |
8ceb41d7 | 187 | int fd = perf_data__fd(data); |
99fa2984 AH |
188 | int err; |
189 | ||
190 | file_offset = lseek(fd, 0, SEEK_CUR); | |
191 | if (file_offset == -1) | |
192 | return -1; | |
193 | err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index, | |
194 | event, file_offset); | |
195 | if (err) | |
196 | return err; | |
197 | } | |
198 | ||
ef149c25 AH |
199 | /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */ |
200 | padding = (len1 + len2) & 7; | |
201 | if (padding) | |
202 | padding = 8 - padding; | |
203 | ||
ded2b8fe JO |
204 | record__write(rec, map, event, event->header.size); |
205 | record__write(rec, map, data1, len1); | |
ef149c25 | 206 | if (len2) |
ded2b8fe JO |
207 | record__write(rec, map, data2, len2); |
208 | record__write(rec, map, &pad, padding); | |
ef149c25 AH |
209 | |
210 | return 0; | |
211 | } | |
212 | ||
213 | static int record__auxtrace_mmap_read(struct record *rec, | |
e035f4ca | 214 | struct perf_mmap *map) |
ef149c25 AH |
215 | { |
216 | int ret; | |
217 | ||
e035f4ca | 218 | ret = auxtrace_mmap__read(map, rec->itr, &rec->tool, |
ef149c25 AH |
219 | record__process_auxtrace); |
220 | if (ret < 0) | |
221 | return ret; | |
222 | ||
223 | if (ret) | |
224 | rec->samples++; | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
2dd6d8a1 | 229 | static int record__auxtrace_mmap_read_snapshot(struct record *rec, |
e035f4ca | 230 | struct perf_mmap *map) |
2dd6d8a1 AH |
231 | { |
232 | int ret; | |
233 | ||
e035f4ca | 234 | ret = auxtrace_mmap__read_snapshot(map, rec->itr, &rec->tool, |
2dd6d8a1 AH |
235 | record__process_auxtrace, |
236 | rec->opts.auxtrace_snapshot_size); | |
237 | if (ret < 0) | |
238 | return ret; | |
239 | ||
240 | if (ret) | |
241 | rec->samples++; | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | static int record__auxtrace_read_snapshot_all(struct record *rec) | |
247 | { | |
248 | int i; | |
249 | int rc = 0; | |
250 | ||
251 | for (i = 0; i < rec->evlist->nr_mmaps; i++) { | |
e035f4ca | 252 | struct perf_mmap *map = &rec->evlist->mmap[i]; |
2dd6d8a1 | 253 | |
e035f4ca | 254 | if (!map->auxtrace_mmap.base) |
2dd6d8a1 AH |
255 | continue; |
256 | ||
e035f4ca | 257 | if (record__auxtrace_mmap_read_snapshot(rec, map) != 0) { |
2dd6d8a1 AH |
258 | rc = -1; |
259 | goto out; | |
260 | } | |
261 | } | |
262 | out: | |
263 | return rc; | |
264 | } | |
265 | ||
266 | static void record__read_auxtrace_snapshot(struct record *rec) | |
267 | { | |
268 | pr_debug("Recording AUX area tracing snapshot\n"); | |
269 | if (record__auxtrace_read_snapshot_all(rec) < 0) { | |
5f9cf599 | 270 | trigger_error(&auxtrace_snapshot_trigger); |
2dd6d8a1 | 271 | } else { |
5f9cf599 WN |
272 | if (auxtrace_record__snapshot_finish(rec->itr)) |
273 | trigger_error(&auxtrace_snapshot_trigger); | |
274 | else | |
275 | trigger_ready(&auxtrace_snapshot_trigger); | |
2dd6d8a1 AH |
276 | } |
277 | } | |
278 | ||
4b5ea3bd AH |
279 | static int record__auxtrace_init(struct record *rec) |
280 | { | |
281 | int err; | |
282 | ||
283 | if (!rec->itr) { | |
284 | rec->itr = auxtrace_record__init(rec->evlist, &err); | |
285 | if (err) | |
286 | return err; | |
287 | } | |
288 | ||
289 | err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts, | |
290 | rec->opts.auxtrace_snapshot_opts); | |
291 | if (err) | |
292 | return err; | |
293 | ||
294 | return auxtrace_parse_filters(rec->evlist); | |
295 | } | |
296 | ||
e31f0d01 AH |
297 | #else |
298 | ||
299 | static inline | |
300 | int record__auxtrace_mmap_read(struct record *rec __maybe_unused, | |
e035f4ca | 301 | struct perf_mmap *map __maybe_unused) |
e31f0d01 AH |
302 | { |
303 | return 0; | |
304 | } | |
305 | ||
2dd6d8a1 AH |
306 | static inline |
307 | void record__read_auxtrace_snapshot(struct record *rec __maybe_unused) | |
de9ac07b | 308 | { |
f7b7c26e PZ |
309 | } |
310 | ||
2dd6d8a1 AH |
311 | static inline |
312 | int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused) | |
f7b7c26e | 313 | { |
2dd6d8a1 | 314 | return 0; |
de9ac07b PZ |
315 | } |
316 | ||
4b5ea3bd AH |
317 | static int record__auxtrace_init(struct record *rec __maybe_unused) |
318 | { | |
319 | return 0; | |
320 | } | |
321 | ||
2dd6d8a1 AH |
322 | #endif |
323 | ||
cda57a8c WN |
324 | static int record__mmap_evlist(struct record *rec, |
325 | struct perf_evlist *evlist) | |
326 | { | |
327 | struct record_opts *opts = &rec->opts; | |
328 | char msg[512]; | |
329 | ||
7a276ff6 | 330 | if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, |
cda57a8c WN |
331 | opts->auxtrace_mmap_pages, |
332 | opts->auxtrace_snapshot_mode) < 0) { | |
333 | if (errno == EPERM) { | |
334 | pr_err("Permission error mapping pages.\n" | |
335 | "Consider increasing " | |
336 | "/proc/sys/kernel/perf_event_mlock_kb,\n" | |
337 | "or try again with a smaller value of -m/--mmap_pages.\n" | |
338 | "(current value: %u,%u)\n", | |
339 | opts->mmap_pages, opts->auxtrace_mmap_pages); | |
340 | return -errno; | |
341 | } else { | |
342 | pr_err("failed to mmap with %d (%s)\n", errno, | |
c8b5f2c9 | 343 | str_error_r(errno, msg, sizeof(msg))); |
cda57a8c WN |
344 | if (errno) |
345 | return -errno; | |
346 | else | |
347 | return -EINVAL; | |
348 | } | |
349 | } | |
350 | return 0; | |
351 | } | |
352 | ||
353 | static int record__mmap(struct record *rec) | |
354 | { | |
355 | return record__mmap_evlist(rec, rec->evlist); | |
356 | } | |
357 | ||
8c6f45a7 | 358 | static int record__open(struct record *rec) |
dd7927f4 | 359 | { |
d6195a6a | 360 | char msg[BUFSIZ]; |
6a4bb04c | 361 | struct perf_evsel *pos; |
d20deb64 ACM |
362 | struct perf_evlist *evlist = rec->evlist; |
363 | struct perf_session *session = rec->session; | |
b4006796 | 364 | struct record_opts *opts = &rec->opts; |
5d8bb1ec | 365 | struct perf_evsel_config_term *err_term; |
8d3eca20 | 366 | int rc = 0; |
dd7927f4 | 367 | |
d3dbf43c ACM |
368 | /* |
369 | * For initial_delay we need to add a dummy event so that we can track | |
370 | * PERF_RECORD_MMAP while we wait for the initial delay to enable the | |
371 | * real events, the ones asked by the user. | |
372 | */ | |
373 | if (opts->initial_delay) { | |
374 | if (perf_evlist__add_dummy(evlist)) | |
375 | return -ENOMEM; | |
376 | ||
377 | pos = perf_evlist__first(evlist); | |
378 | pos->tracking = 0; | |
379 | pos = perf_evlist__last(evlist); | |
380 | pos->tracking = 1; | |
381 | pos->attr.enable_on_exec = 1; | |
382 | } | |
383 | ||
e68ae9cf | 384 | perf_evlist__config(evlist, opts, &callchain_param); |
cac21425 | 385 | |
e5cadb93 | 386 | evlist__for_each_entry(evlist, pos) { |
dd7927f4 | 387 | try_again: |
d988d5ee | 388 | if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) { |
56e52e85 | 389 | if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) { |
bb963e16 | 390 | if (verbose > 0) |
c0a54341 | 391 | ui__warning("%s\n", msg); |
d6d901c2 ZY |
392 | goto try_again; |
393 | } | |
ca6a4258 | 394 | |
56e52e85 ACM |
395 | rc = -errno; |
396 | perf_evsel__open_strerror(pos, &opts->target, | |
397 | errno, msg, sizeof(msg)); | |
398 | ui__error("%s\n", msg); | |
8d3eca20 | 399 | goto out; |
c171b552 | 400 | } |
bfd8f72c AK |
401 | |
402 | pos->supported = true; | |
c171b552 | 403 | } |
a43d3f08 | 404 | |
23d4aad4 | 405 | if (perf_evlist__apply_filters(evlist, &pos)) { |
62d94b00 | 406 | pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", |
23d4aad4 | 407 | pos->filter, perf_evsel__name(pos), errno, |
c8b5f2c9 | 408 | str_error_r(errno, msg, sizeof(msg))); |
8d3eca20 | 409 | rc = -1; |
5d8bb1ec MP |
410 | goto out; |
411 | } | |
412 | ||
413 | if (perf_evlist__apply_drv_configs(evlist, &pos, &err_term)) { | |
62d94b00 | 414 | pr_err("failed to set config \"%s\" on event %s with %d (%s)\n", |
5d8bb1ec MP |
415 | err_term->val.drv_cfg, perf_evsel__name(pos), errno, |
416 | str_error_r(errno, msg, sizeof(msg))); | |
417 | rc = -1; | |
8d3eca20 | 418 | goto out; |
0a102479 FW |
419 | } |
420 | ||
cda57a8c WN |
421 | rc = record__mmap(rec); |
422 | if (rc) | |
8d3eca20 | 423 | goto out; |
0a27d7f9 | 424 | |
563aecb2 | 425 | session->evlist = evlist; |
7b56cce2 | 426 | perf_session__set_id_hdr_size(session); |
8d3eca20 DA |
427 | out: |
428 | return rc; | |
16c8a109 PZ |
429 | } |
430 | ||
e3d59112 NK |
431 | static int process_sample_event(struct perf_tool *tool, |
432 | union perf_event *event, | |
433 | struct perf_sample *sample, | |
434 | struct perf_evsel *evsel, | |
435 | struct machine *machine) | |
436 | { | |
437 | struct record *rec = container_of(tool, struct record, tool); | |
438 | ||
68588baf JY |
439 | if (rec->evlist->first_sample_time == 0) |
440 | rec->evlist->first_sample_time = sample->time; | |
441 | ||
442 | rec->evlist->last_sample_time = sample->time; | |
e3d59112 | 443 | |
68588baf JY |
444 | if (rec->buildid_all) |
445 | return 0; | |
446 | ||
447 | rec->samples++; | |
e3d59112 NK |
448 | return build_id__mark_dso_hit(tool, event, sample, evsel, machine); |
449 | } | |
450 | ||
8c6f45a7 | 451 | static int process_buildids(struct record *rec) |
6122e4e4 | 452 | { |
8ceb41d7 | 453 | struct perf_data *data = &rec->data; |
f5fc1412 | 454 | struct perf_session *session = rec->session; |
6122e4e4 | 455 | |
8ceb41d7 | 456 | if (data->size == 0) |
9f591fd7 ACM |
457 | return 0; |
458 | ||
00dc8657 NK |
459 | /* |
460 | * During this process, it'll load kernel map and replace the | |
461 | * dso->long_name to a real pathname it found. In this case | |
462 | * we prefer the vmlinux path like | |
463 | * /lib/modules/3.16.4/build/vmlinux | |
464 | * | |
465 | * rather than build-id path (in debug directory). | |
466 | * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 | |
467 | */ | |
468 | symbol_conf.ignore_vmlinux_buildid = true; | |
469 | ||
6156681b NK |
470 | /* |
471 | * If --buildid-all is given, it marks all DSO regardless of hits, | |
68588baf JY |
472 | * so no need to process samples. But if timestamp_boundary is enabled, |
473 | * it still needs to walk on all samples to get the timestamps of | |
474 | * first/last samples. | |
6156681b | 475 | */ |
68588baf | 476 | if (rec->buildid_all && !rec->timestamp_boundary) |
6156681b NK |
477 | rec->tool.sample = NULL; |
478 | ||
b7b61cbe | 479 | return perf_session__process_events(session); |
6122e4e4 ACM |
480 | } |
481 | ||
8115d60c | 482 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
483 | { |
484 | int err; | |
45694aa7 | 485 | struct perf_tool *tool = data; |
a1645ce1 ZY |
486 | /* |
487 | *As for guest kernel when processing subcommand record&report, | |
488 | *we arrange module mmap prior to guest kernel mmap and trigger | |
489 | *a preload dso because default guest module symbols are loaded | |
490 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
491 | *method is used to avoid symbol missing when the first addr is | |
492 | *in module instead of in guest kernel. | |
493 | */ | |
45694aa7 | 494 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 495 | machine); |
a1645ce1 ZY |
496 | if (err < 0) |
497 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 498 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 499 | |
a1645ce1 ZY |
500 | /* |
501 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
502 | * have no _text sometimes. | |
503 | */ | |
45694aa7 | 504 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
0ae617be | 505 | machine); |
a1645ce1 ZY |
506 | if (err < 0) |
507 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 508 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
509 | } |
510 | ||
98402807 FW |
511 | static struct perf_event_header finished_round_event = { |
512 | .size = sizeof(struct perf_event_header), | |
513 | .type = PERF_RECORD_FINISHED_ROUND, | |
514 | }; | |
515 | ||
a4ea0ec4 | 516 | static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist, |
0b72d69a | 517 | bool overwrite) |
98402807 | 518 | { |
dcabb507 | 519 | u64 bytes_written = rec->bytes_written; |
0e2e63dd | 520 | int i; |
8d3eca20 | 521 | int rc = 0; |
a4ea0ec4 | 522 | struct perf_mmap *maps; |
98402807 | 523 | |
cb21686b WN |
524 | if (!evlist) |
525 | return 0; | |
ef149c25 | 526 | |
0b72d69a | 527 | maps = overwrite ? evlist->overwrite_mmap : evlist->mmap; |
a4ea0ec4 WN |
528 | if (!maps) |
529 | return 0; | |
530 | ||
0b72d69a | 531 | if (overwrite && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING) |
54cc54de WN |
532 | return 0; |
533 | ||
cb21686b | 534 | for (i = 0; i < evlist->nr_mmaps; i++) { |
e035f4ca | 535 | struct perf_mmap *map = &maps[i]; |
cb21686b | 536 | |
e035f4ca JO |
537 | if (map->base) { |
538 | if (perf_mmap__push(map, rec, record__pushfn) != 0) { | |
8d3eca20 DA |
539 | rc = -1; |
540 | goto out; | |
541 | } | |
542 | } | |
ef149c25 | 543 | |
e035f4ca JO |
544 | if (map->auxtrace_mmap.base && !rec->opts.auxtrace_snapshot_mode && |
545 | record__auxtrace_mmap_read(rec, map) != 0) { | |
ef149c25 AH |
546 | rc = -1; |
547 | goto out; | |
548 | } | |
98402807 FW |
549 | } |
550 | ||
dcabb507 JO |
551 | /* |
552 | * Mark the round finished in case we wrote | |
553 | * at least one event. | |
554 | */ | |
555 | if (bytes_written != rec->bytes_written) | |
ded2b8fe | 556 | rc = record__write(rec, NULL, &finished_round_event, sizeof(finished_round_event)); |
8d3eca20 | 557 | |
0b72d69a | 558 | if (overwrite) |
54cc54de | 559 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); |
8d3eca20 DA |
560 | out: |
561 | return rc; | |
98402807 FW |
562 | } |
563 | ||
cb21686b WN |
564 | static int record__mmap_read_all(struct record *rec) |
565 | { | |
566 | int err; | |
567 | ||
a4ea0ec4 | 568 | err = record__mmap_read_evlist(rec, rec->evlist, false); |
cb21686b WN |
569 | if (err) |
570 | return err; | |
571 | ||
05737464 | 572 | return record__mmap_read_evlist(rec, rec->evlist, true); |
cb21686b WN |
573 | } |
574 | ||
8c6f45a7 | 575 | static void record__init_features(struct record *rec) |
57706abc | 576 | { |
57706abc DA |
577 | struct perf_session *session = rec->session; |
578 | int feat; | |
579 | ||
580 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) | |
581 | perf_header__set_feat(&session->header, feat); | |
582 | ||
583 | if (rec->no_buildid) | |
584 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); | |
585 | ||
3e2be2da | 586 | if (!have_tracepoints(&rec->evlist->entries)) |
57706abc DA |
587 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
588 | ||
589 | if (!rec->opts.branch_stack) | |
590 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); | |
ef149c25 AH |
591 | |
592 | if (!rec->opts.full_auxtrace) | |
593 | perf_header__clear_feat(&session->header, HEADER_AUXTRACE); | |
ffa517ad | 594 | |
cf790516 AB |
595 | if (!(rec->opts.use_clockid && rec->opts.clockid_res_ns)) |
596 | perf_header__clear_feat(&session->header, HEADER_CLOCKID); | |
597 | ||
ffa517ad | 598 | perf_header__clear_feat(&session->header, HEADER_STAT); |
57706abc DA |
599 | } |
600 | ||
e1ab48ba WN |
601 | static void |
602 | record__finish_output(struct record *rec) | |
603 | { | |
8ceb41d7 JO |
604 | struct perf_data *data = &rec->data; |
605 | int fd = perf_data__fd(data); | |
e1ab48ba | 606 | |
8ceb41d7 | 607 | if (data->is_pipe) |
e1ab48ba WN |
608 | return; |
609 | ||
610 | rec->session->header.data_size += rec->bytes_written; | |
8ceb41d7 | 611 | data->size = lseek(perf_data__fd(data), 0, SEEK_CUR); |
e1ab48ba WN |
612 | |
613 | if (!rec->no_buildid) { | |
614 | process_buildids(rec); | |
615 | ||
616 | if (rec->buildid_all) | |
617 | dsos__hit_all(rec->session); | |
618 | } | |
619 | perf_session__write_header(rec->session, rec->evlist, fd, true); | |
620 | ||
621 | return; | |
622 | } | |
623 | ||
4ea648ae | 624 | static int record__synthesize_workload(struct record *rec, bool tail) |
be7b0c9e | 625 | { |
9d6aae72 ACM |
626 | int err; |
627 | struct thread_map *thread_map; | |
be7b0c9e | 628 | |
4ea648ae WN |
629 | if (rec->opts.tail_synthesize != tail) |
630 | return 0; | |
631 | ||
9d6aae72 ACM |
632 | thread_map = thread_map__new_by_tid(rec->evlist->workload.pid); |
633 | if (thread_map == NULL) | |
634 | return -1; | |
635 | ||
636 | err = perf_event__synthesize_thread_map(&rec->tool, thread_map, | |
be7b0c9e WN |
637 | process_synthesized_event, |
638 | &rec->session->machines.host, | |
639 | rec->opts.sample_address, | |
640 | rec->opts.proc_map_timeout); | |
9d6aae72 ACM |
641 | thread_map__put(thread_map); |
642 | return err; | |
be7b0c9e WN |
643 | } |
644 | ||
4ea648ae | 645 | static int record__synthesize(struct record *rec, bool tail); |
3c1cb7e3 | 646 | |
ecfd7a9c WN |
647 | static int |
648 | record__switch_output(struct record *rec, bool at_exit) | |
649 | { | |
8ceb41d7 | 650 | struct perf_data *data = &rec->data; |
ecfd7a9c WN |
651 | int fd, err; |
652 | ||
653 | /* Same Size: "2015122520103046"*/ | |
654 | char timestamp[] = "InvalidTimestamp"; | |
655 | ||
4ea648ae WN |
656 | record__synthesize(rec, true); |
657 | if (target__none(&rec->opts.target)) | |
658 | record__synthesize_workload(rec, true); | |
659 | ||
ecfd7a9c WN |
660 | rec->samples = 0; |
661 | record__finish_output(rec); | |
662 | err = fetch_current_timestamp(timestamp, sizeof(timestamp)); | |
663 | if (err) { | |
664 | pr_err("Failed to get current timestamp\n"); | |
665 | return -EINVAL; | |
666 | } | |
667 | ||
8ceb41d7 | 668 | fd = perf_data__switch(data, timestamp, |
ecfd7a9c WN |
669 | rec->session->header.data_offset, |
670 | at_exit); | |
671 | if (fd >= 0 && !at_exit) { | |
672 | rec->bytes_written = 0; | |
673 | rec->session->header.data_size = 0; | |
674 | } | |
675 | ||
676 | if (!quiet) | |
677 | fprintf(stderr, "[ perf record: Dump %s.%s ]\n", | |
eae8ad80 | 678 | data->file.path, timestamp); |
3c1cb7e3 WN |
679 | |
680 | /* Output tracking events */ | |
be7b0c9e | 681 | if (!at_exit) { |
4ea648ae | 682 | record__synthesize(rec, false); |
3c1cb7e3 | 683 | |
be7b0c9e WN |
684 | /* |
685 | * In 'perf record --switch-output' without -a, | |
686 | * record__synthesize() in record__switch_output() won't | |
687 | * generate tracking events because there's no thread_map | |
688 | * in evlist. Which causes newly created perf.data doesn't | |
689 | * contain map and comm information. | |
690 | * Create a fake thread_map and directly call | |
691 | * perf_event__synthesize_thread_map() for those events. | |
692 | */ | |
693 | if (target__none(&rec->opts.target)) | |
4ea648ae | 694 | record__synthesize_workload(rec, false); |
be7b0c9e | 695 | } |
ecfd7a9c WN |
696 | return fd; |
697 | } | |
698 | ||
f33cbe72 ACM |
699 | static volatile int workload_exec_errno; |
700 | ||
701 | /* | |
702 | * perf_evlist__prepare_workload will send a SIGUSR1 | |
703 | * if the fork fails, since we asked by setting its | |
704 | * want_signal to true. | |
705 | */ | |
45604710 NK |
706 | static void workload_exec_failed_signal(int signo __maybe_unused, |
707 | siginfo_t *info, | |
f33cbe72 ACM |
708 | void *ucontext __maybe_unused) |
709 | { | |
710 | workload_exec_errno = info->si_value.sival_int; | |
711 | done = 1; | |
f33cbe72 ACM |
712 | child_finished = 1; |
713 | } | |
714 | ||
2dd6d8a1 | 715 | static void snapshot_sig_handler(int sig); |
bfacbe3b | 716 | static void alarm_sig_handler(int sig); |
2dd6d8a1 | 717 | |
46bc29b9 AH |
718 | int __weak |
719 | perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused, | |
720 | struct perf_tool *tool __maybe_unused, | |
721 | perf_event__handler_t process __maybe_unused, | |
722 | struct machine *machine __maybe_unused) | |
723 | { | |
724 | return 0; | |
725 | } | |
726 | ||
ee667f94 WN |
727 | static const struct perf_event_mmap_page * |
728 | perf_evlist__pick_pc(struct perf_evlist *evlist) | |
729 | { | |
b2cb615d WN |
730 | if (evlist) { |
731 | if (evlist->mmap && evlist->mmap[0].base) | |
732 | return evlist->mmap[0].base; | |
0b72d69a WN |
733 | if (evlist->overwrite_mmap && evlist->overwrite_mmap[0].base) |
734 | return evlist->overwrite_mmap[0].base; | |
b2cb615d | 735 | } |
ee667f94 WN |
736 | return NULL; |
737 | } | |
738 | ||
c45628b0 WN |
739 | static const struct perf_event_mmap_page *record__pick_pc(struct record *rec) |
740 | { | |
ee667f94 WN |
741 | const struct perf_event_mmap_page *pc; |
742 | ||
743 | pc = perf_evlist__pick_pc(rec->evlist); | |
744 | if (pc) | |
745 | return pc; | |
c45628b0 WN |
746 | return NULL; |
747 | } | |
748 | ||
4ea648ae | 749 | static int record__synthesize(struct record *rec, bool tail) |
c45c86eb WN |
750 | { |
751 | struct perf_session *session = rec->session; | |
752 | struct machine *machine = &session->machines.host; | |
8ceb41d7 | 753 | struct perf_data *data = &rec->data; |
c45c86eb WN |
754 | struct record_opts *opts = &rec->opts; |
755 | struct perf_tool *tool = &rec->tool; | |
8ceb41d7 | 756 | int fd = perf_data__fd(data); |
c45c86eb WN |
757 | int err = 0; |
758 | ||
4ea648ae WN |
759 | if (rec->opts.tail_synthesize != tail) |
760 | return 0; | |
761 | ||
8ceb41d7 | 762 | if (data->is_pipe) { |
a2015516 JO |
763 | /* |
764 | * We need to synthesize events first, because some | |
765 | * features works on top of them (on report side). | |
766 | */ | |
318ec184 | 767 | err = perf_event__synthesize_attrs(tool, rec->evlist, |
c45c86eb WN |
768 | process_synthesized_event); |
769 | if (err < 0) { | |
770 | pr_err("Couldn't synthesize attrs.\n"); | |
771 | goto out; | |
772 | } | |
773 | ||
a2015516 JO |
774 | err = perf_event__synthesize_features(tool, session, rec->evlist, |
775 | process_synthesized_event); | |
776 | if (err < 0) { | |
777 | pr_err("Couldn't synthesize features.\n"); | |
778 | return err; | |
779 | } | |
780 | ||
c45c86eb WN |
781 | if (have_tracepoints(&rec->evlist->entries)) { |
782 | /* | |
783 | * FIXME err <= 0 here actually means that | |
784 | * there were no tracepoints so its not really | |
785 | * an error, just that we don't need to | |
786 | * synthesize anything. We really have to | |
787 | * return this more properly and also | |
788 | * propagate errors that now are calling die() | |
789 | */ | |
790 | err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist, | |
791 | process_synthesized_event); | |
792 | if (err <= 0) { | |
793 | pr_err("Couldn't record tracing data.\n"); | |
794 | goto out; | |
795 | } | |
796 | rec->bytes_written += err; | |
797 | } | |
798 | } | |
799 | ||
c45628b0 | 800 | err = perf_event__synth_time_conv(record__pick_pc(rec), tool, |
46bc29b9 AH |
801 | process_synthesized_event, machine); |
802 | if (err) | |
803 | goto out; | |
804 | ||
c45c86eb WN |
805 | if (rec->opts.full_auxtrace) { |
806 | err = perf_event__synthesize_auxtrace_info(rec->itr, tool, | |
807 | session, process_synthesized_event); | |
808 | if (err) | |
809 | goto out; | |
810 | } | |
811 | ||
6c443954 ACM |
812 | if (!perf_evlist__exclude_kernel(rec->evlist)) { |
813 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, | |
814 | machine); | |
815 | WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n" | |
816 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
817 | "Check /proc/kallsyms permission or run as root.\n"); | |
818 | ||
819 | err = perf_event__synthesize_modules(tool, process_synthesized_event, | |
820 | machine); | |
821 | WARN_ONCE(err < 0, "Couldn't record kernel module information.\n" | |
822 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
823 | "Check /proc/modules permission or run as root.\n"); | |
824 | } | |
c45c86eb WN |
825 | |
826 | if (perf_guest) { | |
827 | machines__process_guests(&session->machines, | |
828 | perf_event__synthesize_guest_os, tool); | |
829 | } | |
830 | ||
bfd8f72c AK |
831 | err = perf_event__synthesize_extra_attr(&rec->tool, |
832 | rec->evlist, | |
833 | process_synthesized_event, | |
834 | data->is_pipe); | |
835 | if (err) | |
836 | goto out; | |
837 | ||
373565d2 AK |
838 | err = perf_event__synthesize_thread_map2(&rec->tool, rec->evlist->threads, |
839 | process_synthesized_event, | |
840 | NULL); | |
841 | if (err < 0) { | |
842 | pr_err("Couldn't synthesize thread map.\n"); | |
843 | return err; | |
844 | } | |
845 | ||
846 | err = perf_event__synthesize_cpu_map(&rec->tool, rec->evlist->cpus, | |
847 | process_synthesized_event, NULL); | |
848 | if (err < 0) { | |
849 | pr_err("Couldn't synthesize cpu map.\n"); | |
850 | return err; | |
851 | } | |
852 | ||
c45c86eb WN |
853 | err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads, |
854 | process_synthesized_event, opts->sample_address, | |
340b47f5 | 855 | opts->proc_map_timeout, 1); |
c45c86eb WN |
856 | out: |
857 | return err; | |
858 | } | |
859 | ||
8c6f45a7 | 860 | static int __cmd_record(struct record *rec, int argc, const char **argv) |
16c8a109 | 861 | { |
57706abc | 862 | int err; |
45604710 | 863 | int status = 0; |
8b412664 | 864 | unsigned long waking = 0; |
46be604b | 865 | const bool forks = argc > 0; |
45694aa7 | 866 | struct perf_tool *tool = &rec->tool; |
b4006796 | 867 | struct record_opts *opts = &rec->opts; |
8ceb41d7 | 868 | struct perf_data *data = &rec->data; |
d20deb64 | 869 | struct perf_session *session; |
6dcf45ef | 870 | bool disabled = false, draining = false; |
42aa276f | 871 | int fd; |
de9ac07b | 872 | |
45604710 | 873 | atexit(record__sig_exit); |
f5970550 PZ |
874 | signal(SIGCHLD, sig_handler); |
875 | signal(SIGINT, sig_handler); | |
804f7ac7 | 876 | signal(SIGTERM, sig_handler); |
a074865e | 877 | signal(SIGSEGV, sigsegv_handler); |
c0bdc1c4 | 878 | |
f3b3614a HB |
879 | if (rec->opts.record_namespaces) |
880 | tool->namespace_events = true; | |
881 | ||
dc0c6127 | 882 | if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) { |
2dd6d8a1 | 883 | signal(SIGUSR2, snapshot_sig_handler); |
3c1cb7e3 WN |
884 | if (rec->opts.auxtrace_snapshot_mode) |
885 | trigger_on(&auxtrace_snapshot_trigger); | |
dc0c6127 | 886 | if (rec->switch_output.enabled) |
3c1cb7e3 | 887 | trigger_on(&switch_output_trigger); |
c0bdc1c4 | 888 | } else { |
2dd6d8a1 | 889 | signal(SIGUSR2, SIG_IGN); |
c0bdc1c4 | 890 | } |
f5970550 | 891 | |
8ceb41d7 | 892 | session = perf_session__new(data, false, tool); |
94c744b6 | 893 | if (session == NULL) { |
ffa91880 | 894 | pr_err("Perf session creation failed.\n"); |
a9a70bbc ACM |
895 | return -1; |
896 | } | |
897 | ||
8ceb41d7 | 898 | fd = perf_data__fd(data); |
d20deb64 ACM |
899 | rec->session = session; |
900 | ||
8c6f45a7 | 901 | record__init_features(rec); |
330aa675 | 902 | |
cf790516 AB |
903 | if (rec->opts.use_clockid && rec->opts.clockid_res_ns) |
904 | session->header.env.clockid_res_ns = rec->opts.clockid_res_ns; | |
905 | ||
d4db3f16 | 906 | if (forks) { |
3e2be2da | 907 | err = perf_evlist__prepare_workload(rec->evlist, &opts->target, |
8ceb41d7 | 908 | argv, data->is_pipe, |
735f7e0b | 909 | workload_exec_failed_signal); |
35b9d88e ACM |
910 | if (err < 0) { |
911 | pr_err("Couldn't run the workload!\n"); | |
45604710 | 912 | status = err; |
35b9d88e | 913 | goto out_delete_session; |
856e9660 | 914 | } |
856e9660 PZ |
915 | } |
916 | ||
ad46e48c JO |
917 | /* |
918 | * If we have just single event and are sending data | |
919 | * through pipe, we need to force the ids allocation, | |
920 | * because we synthesize event name through the pipe | |
921 | * and need the id for that. | |
922 | */ | |
923 | if (data->is_pipe && rec->evlist->nr_entries == 1) | |
924 | rec->opts.sample_id = true; | |
925 | ||
8c6f45a7 | 926 | if (record__open(rec) != 0) { |
8d3eca20 | 927 | err = -1; |
45604710 | 928 | goto out_child; |
8d3eca20 | 929 | } |
de9ac07b | 930 | |
8690a2a7 WN |
931 | err = bpf__apply_obj_config(); |
932 | if (err) { | |
933 | char errbuf[BUFSIZ]; | |
934 | ||
935 | bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); | |
936 | pr_err("ERROR: Apply config to BPF failed: %s\n", | |
937 | errbuf); | |
938 | goto out_child; | |
939 | } | |
940 | ||
cca8482c AH |
941 | /* |
942 | * Normally perf_session__new would do this, but it doesn't have the | |
943 | * evlist. | |
944 | */ | |
945 | if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) { | |
946 | pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n"); | |
947 | rec->tool.ordered_events = false; | |
948 | } | |
949 | ||
3e2be2da | 950 | if (!rec->evlist->nr_groups) |
a8bb559b NK |
951 | perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); |
952 | ||
8ceb41d7 | 953 | if (data->is_pipe) { |
42aa276f | 954 | err = perf_header__write_pipe(fd); |
529870e3 | 955 | if (err < 0) |
45604710 | 956 | goto out_child; |
563aecb2 | 957 | } else { |
42aa276f | 958 | err = perf_session__write_header(session, rec->evlist, fd, false); |
d5eed904 | 959 | if (err < 0) |
45604710 | 960 | goto out_child; |
56b03f3c ACM |
961 | } |
962 | ||
d3665498 | 963 | if (!rec->no_buildid |
e20960c0 | 964 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
d3665498 | 965 | pr_err("Couldn't generate buildids. " |
e20960c0 | 966 | "Use --no-buildid to profile anyway.\n"); |
8d3eca20 | 967 | err = -1; |
45604710 | 968 | goto out_child; |
e20960c0 RR |
969 | } |
970 | ||
4ea648ae | 971 | err = record__synthesize(rec, false); |
c45c86eb | 972 | if (err < 0) |
45604710 | 973 | goto out_child; |
8d3eca20 | 974 | |
d20deb64 | 975 | if (rec->realtime_prio) { |
de9ac07b PZ |
976 | struct sched_param param; |
977 | ||
d20deb64 | 978 | param.sched_priority = rec->realtime_prio; |
de9ac07b | 979 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
6beba7ad | 980 | pr_err("Could not set realtime priority.\n"); |
8d3eca20 | 981 | err = -1; |
45604710 | 982 | goto out_child; |
de9ac07b PZ |
983 | } |
984 | } | |
985 | ||
774cb499 JO |
986 | /* |
987 | * When perf is starting the traced process, all the events | |
988 | * (apart from group members) have enable_on_exec=1 set, | |
989 | * so don't spoil it by prematurely enabling them. | |
990 | */ | |
6619a53e | 991 | if (!target__none(&opts->target) && !opts->initial_delay) |
3e2be2da | 992 | perf_evlist__enable(rec->evlist); |
764e16a3 | 993 | |
856e9660 PZ |
994 | /* |
995 | * Let the child rip | |
996 | */ | |
e803cf97 | 997 | if (forks) { |
20a8a3cf | 998 | struct machine *machine = &session->machines.host; |
e5bed564 | 999 | union perf_event *event; |
e907caf3 | 1000 | pid_t tgid; |
e5bed564 NK |
1001 | |
1002 | event = malloc(sizeof(event->comm) + machine->id_hdr_size); | |
1003 | if (event == NULL) { | |
1004 | err = -ENOMEM; | |
1005 | goto out_child; | |
1006 | } | |
1007 | ||
e803cf97 NK |
1008 | /* |
1009 | * Some H/W events are generated before COMM event | |
1010 | * which is emitted during exec(), so perf script | |
1011 | * cannot see a correct process name for those events. | |
1012 | * Synthesize COMM event to prevent it. | |
1013 | */ | |
e907caf3 HB |
1014 | tgid = perf_event__synthesize_comm(tool, event, |
1015 | rec->evlist->workload.pid, | |
1016 | process_synthesized_event, | |
1017 | machine); | |
1018 | free(event); | |
1019 | ||
1020 | if (tgid == -1) | |
1021 | goto out_child; | |
1022 | ||
1023 | event = malloc(sizeof(event->namespaces) + | |
1024 | (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + | |
1025 | machine->id_hdr_size); | |
1026 | if (event == NULL) { | |
1027 | err = -ENOMEM; | |
1028 | goto out_child; | |
1029 | } | |
1030 | ||
1031 | /* | |
1032 | * Synthesize NAMESPACES event for the command specified. | |
1033 | */ | |
1034 | perf_event__synthesize_namespaces(tool, event, | |
1035 | rec->evlist->workload.pid, | |
1036 | tgid, process_synthesized_event, | |
1037 | machine); | |
e5bed564 | 1038 | free(event); |
e803cf97 | 1039 | |
3e2be2da | 1040 | perf_evlist__start_workload(rec->evlist); |
e803cf97 | 1041 | } |
856e9660 | 1042 | |
6619a53e | 1043 | if (opts->initial_delay) { |
0693e680 | 1044 | usleep(opts->initial_delay * USEC_PER_MSEC); |
6619a53e AK |
1045 | perf_evlist__enable(rec->evlist); |
1046 | } | |
1047 | ||
5f9cf599 | 1048 | trigger_ready(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1049 | trigger_ready(&switch_output_trigger); |
a074865e | 1050 | perf_hooks__invoke_record_start(); |
649c48a9 | 1051 | for (;;) { |
9f065194 | 1052 | unsigned long long hits = rec->samples; |
de9ac07b | 1053 | |
05737464 WN |
1054 | /* |
1055 | * rec->evlist->bkw_mmap_state is possible to be | |
1056 | * BKW_MMAP_EMPTY here: when done == true and | |
1057 | * hits != rec->samples in previous round. | |
1058 | * | |
1059 | * perf_evlist__toggle_bkw_mmap ensure we never | |
1060 | * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING. | |
1061 | */ | |
1062 | if (trigger_is_hit(&switch_output_trigger) || done || draining) | |
1063 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING); | |
1064 | ||
8c6f45a7 | 1065 | if (record__mmap_read_all(rec) < 0) { |
5f9cf599 | 1066 | trigger_error(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1067 | trigger_error(&switch_output_trigger); |
8d3eca20 | 1068 | err = -1; |
45604710 | 1069 | goto out_child; |
8d3eca20 | 1070 | } |
de9ac07b | 1071 | |
2dd6d8a1 AH |
1072 | if (auxtrace_record__snapshot_started) { |
1073 | auxtrace_record__snapshot_started = 0; | |
5f9cf599 | 1074 | if (!trigger_is_error(&auxtrace_snapshot_trigger)) |
2dd6d8a1 | 1075 | record__read_auxtrace_snapshot(rec); |
5f9cf599 | 1076 | if (trigger_is_error(&auxtrace_snapshot_trigger)) { |
2dd6d8a1 AH |
1077 | pr_err("AUX area tracing snapshot failed\n"); |
1078 | err = -1; | |
1079 | goto out_child; | |
1080 | } | |
1081 | } | |
1082 | ||
3c1cb7e3 | 1083 | if (trigger_is_hit(&switch_output_trigger)) { |
05737464 WN |
1084 | /* |
1085 | * If switch_output_trigger is hit, the data in | |
1086 | * overwritable ring buffer should have been collected, | |
1087 | * so bkw_mmap_state should be set to BKW_MMAP_EMPTY. | |
1088 | * | |
1089 | * If SIGUSR2 raise after or during record__mmap_read_all(), | |
1090 | * record__mmap_read_all() didn't collect data from | |
1091 | * overwritable ring buffer. Read again. | |
1092 | */ | |
1093 | if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING) | |
1094 | continue; | |
3c1cb7e3 WN |
1095 | trigger_ready(&switch_output_trigger); |
1096 | ||
05737464 WN |
1097 | /* |
1098 | * Reenable events in overwrite ring buffer after | |
1099 | * record__mmap_read_all(): we should have collected | |
1100 | * data from it. | |
1101 | */ | |
1102 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING); | |
1103 | ||
3c1cb7e3 WN |
1104 | if (!quiet) |
1105 | fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n", | |
1106 | waking); | |
1107 | waking = 0; | |
1108 | fd = record__switch_output(rec, false); | |
1109 | if (fd < 0) { | |
1110 | pr_err("Failed to switch to new file\n"); | |
1111 | trigger_error(&switch_output_trigger); | |
1112 | err = fd; | |
1113 | goto out_child; | |
1114 | } | |
bfacbe3b JO |
1115 | |
1116 | /* re-arm the alarm */ | |
1117 | if (rec->switch_output.time) | |
1118 | alarm(rec->switch_output.time); | |
3c1cb7e3 WN |
1119 | } |
1120 | ||
d20deb64 | 1121 | if (hits == rec->samples) { |
6dcf45ef | 1122 | if (done || draining) |
649c48a9 | 1123 | break; |
f66a889d | 1124 | err = perf_evlist__poll(rec->evlist, -1); |
a515114f JO |
1125 | /* |
1126 | * Propagate error, only if there's any. Ignore positive | |
1127 | * number of returned events and interrupt error. | |
1128 | */ | |
1129 | if (err > 0 || (err < 0 && errno == EINTR)) | |
45604710 | 1130 | err = 0; |
8b412664 | 1131 | waking++; |
6dcf45ef ACM |
1132 | |
1133 | if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0) | |
1134 | draining = true; | |
8b412664 PZ |
1135 | } |
1136 | ||
774cb499 JO |
1137 | /* |
1138 | * When perf is starting the traced process, at the end events | |
1139 | * die with the process and we wait for that. Thus no need to | |
1140 | * disable events in this case. | |
1141 | */ | |
602ad878 | 1142 | if (done && !disabled && !target__none(&opts->target)) { |
5f9cf599 | 1143 | trigger_off(&auxtrace_snapshot_trigger); |
3e2be2da | 1144 | perf_evlist__disable(rec->evlist); |
2711926a JO |
1145 | disabled = true; |
1146 | } | |
de9ac07b | 1147 | } |
5f9cf599 | 1148 | trigger_off(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1149 | trigger_off(&switch_output_trigger); |
de9ac07b | 1150 | |
f33cbe72 | 1151 | if (forks && workload_exec_errno) { |
35550da3 | 1152 | char msg[STRERR_BUFSIZE]; |
c8b5f2c9 | 1153 | const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); |
f33cbe72 ACM |
1154 | pr_err("Workload failed: %s\n", emsg); |
1155 | err = -1; | |
45604710 | 1156 | goto out_child; |
f33cbe72 ACM |
1157 | } |
1158 | ||
e3d59112 | 1159 | if (!quiet) |
45604710 | 1160 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
b44308f5 | 1161 | |
4ea648ae WN |
1162 | if (target__none(&rec->opts.target)) |
1163 | record__synthesize_workload(rec, true); | |
1164 | ||
45604710 NK |
1165 | out_child: |
1166 | if (forks) { | |
1167 | int exit_status; | |
addc2785 | 1168 | |
45604710 NK |
1169 | if (!child_finished) |
1170 | kill(rec->evlist->workload.pid, SIGTERM); | |
1171 | ||
1172 | wait(&exit_status); | |
1173 | ||
1174 | if (err < 0) | |
1175 | status = err; | |
1176 | else if (WIFEXITED(exit_status)) | |
1177 | status = WEXITSTATUS(exit_status); | |
1178 | else if (WIFSIGNALED(exit_status)) | |
1179 | signr = WTERMSIG(exit_status); | |
1180 | } else | |
1181 | status = err; | |
1182 | ||
4ea648ae | 1183 | record__synthesize(rec, true); |
e3d59112 NK |
1184 | /* this will be recalculated during process_buildids() */ |
1185 | rec->samples = 0; | |
1186 | ||
ecfd7a9c WN |
1187 | if (!err) { |
1188 | if (!rec->timestamp_filename) { | |
1189 | record__finish_output(rec); | |
1190 | } else { | |
1191 | fd = record__switch_output(rec, true); | |
1192 | if (fd < 0) { | |
1193 | status = fd; | |
1194 | goto out_delete_session; | |
1195 | } | |
1196 | } | |
1197 | } | |
39d17dac | 1198 | |
a074865e WN |
1199 | perf_hooks__invoke_record_end(); |
1200 | ||
e3d59112 NK |
1201 | if (!err && !quiet) { |
1202 | char samples[128]; | |
ecfd7a9c WN |
1203 | const char *postfix = rec->timestamp_filename ? |
1204 | ".<timestamp>" : ""; | |
e3d59112 | 1205 | |
ef149c25 | 1206 | if (rec->samples && !rec->opts.full_auxtrace) |
e3d59112 NK |
1207 | scnprintf(samples, sizeof(samples), |
1208 | " (%" PRIu64 " samples)", rec->samples); | |
1209 | else | |
1210 | samples[0] = '\0'; | |
1211 | ||
ecfd7a9c | 1212 | fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n", |
8ceb41d7 | 1213 | perf_data__size(data) / 1024.0 / 1024.0, |
eae8ad80 | 1214 | data->file.path, postfix, samples); |
e3d59112 NK |
1215 | } |
1216 | ||
39d17dac ACM |
1217 | out_delete_session: |
1218 | perf_session__delete(session); | |
45604710 | 1219 | return status; |
de9ac07b | 1220 | } |
0e9b20b8 | 1221 | |
0883e820 | 1222 | static void callchain_debug(struct callchain_param *callchain) |
09b0fd45 | 1223 | { |
aad2b21c | 1224 | static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; |
a601fdff | 1225 | |
0883e820 | 1226 | pr_debug("callchain: type %s\n", str[callchain->record_mode]); |
26d33022 | 1227 | |
0883e820 | 1228 | if (callchain->record_mode == CALLCHAIN_DWARF) |
09b0fd45 | 1229 | pr_debug("callchain: stack dump size %d\n", |
0883e820 | 1230 | callchain->dump_size); |
09b0fd45 JO |
1231 | } |
1232 | ||
0883e820 ACM |
1233 | int record_opts__parse_callchain(struct record_opts *record, |
1234 | struct callchain_param *callchain, | |
1235 | const char *arg, bool unset) | |
09b0fd45 | 1236 | { |
09b0fd45 | 1237 | int ret; |
0883e820 | 1238 | callchain->enabled = !unset; |
eb853e80 | 1239 | |
09b0fd45 JO |
1240 | /* --no-call-graph */ |
1241 | if (unset) { | |
0883e820 | 1242 | callchain->record_mode = CALLCHAIN_NONE; |
09b0fd45 JO |
1243 | pr_debug("callchain: disabled\n"); |
1244 | return 0; | |
1245 | } | |
1246 | ||
0883e820 | 1247 | ret = parse_callchain_record_opt(arg, callchain); |
5c0cf224 JO |
1248 | if (!ret) { |
1249 | /* Enable data address sampling for DWARF unwind. */ | |
0883e820 | 1250 | if (callchain->record_mode == CALLCHAIN_DWARF) |
5c0cf224 | 1251 | record->sample_address = true; |
0883e820 | 1252 | callchain_debug(callchain); |
5c0cf224 | 1253 | } |
26d33022 JO |
1254 | |
1255 | return ret; | |
1256 | } | |
1257 | ||
0883e820 ACM |
1258 | int record_parse_callchain_opt(const struct option *opt, |
1259 | const char *arg, | |
1260 | int unset) | |
1261 | { | |
1262 | return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset); | |
1263 | } | |
1264 | ||
c421e80b | 1265 | int record_callchain_opt(const struct option *opt, |
09b0fd45 JO |
1266 | const char *arg __maybe_unused, |
1267 | int unset __maybe_unused) | |
1268 | { | |
2ddd5c04 | 1269 | struct callchain_param *callchain = opt->value; |
c421e80b | 1270 | |
2ddd5c04 | 1271 | callchain->enabled = true; |
09b0fd45 | 1272 | |
2ddd5c04 ACM |
1273 | if (callchain->record_mode == CALLCHAIN_NONE) |
1274 | callchain->record_mode = CALLCHAIN_FP; | |
eb853e80 | 1275 | |
2ddd5c04 | 1276 | callchain_debug(callchain); |
09b0fd45 JO |
1277 | return 0; |
1278 | } | |
1279 | ||
eb853e80 JO |
1280 | static int perf_record_config(const char *var, const char *value, void *cb) |
1281 | { | |
7a29c087 NK |
1282 | struct record *rec = cb; |
1283 | ||
1284 | if (!strcmp(var, "record.build-id")) { | |
1285 | if (!strcmp(value, "cache")) | |
1286 | rec->no_buildid_cache = false; | |
1287 | else if (!strcmp(value, "no-cache")) | |
1288 | rec->no_buildid_cache = true; | |
1289 | else if (!strcmp(value, "skip")) | |
1290 | rec->no_buildid = true; | |
1291 | else | |
1292 | return -1; | |
1293 | return 0; | |
1294 | } | |
cff17205 YX |
1295 | if (!strcmp(var, "record.call-graph")) { |
1296 | var = "call-graph.record-mode"; | |
1297 | return perf_default_config(var, value, cb); | |
1298 | } | |
eb853e80 | 1299 | |
cff17205 | 1300 | return 0; |
eb853e80 JO |
1301 | } |
1302 | ||
814c8c38 PZ |
1303 | struct clockid_map { |
1304 | const char *name; | |
1305 | int clockid; | |
1306 | }; | |
1307 | ||
1308 | #define CLOCKID_MAP(n, c) \ | |
1309 | { .name = n, .clockid = (c), } | |
1310 | ||
1311 | #define CLOCKID_END { .name = NULL, } | |
1312 | ||
1313 | ||
1314 | /* | |
1315 | * Add the missing ones, we need to build on many distros... | |
1316 | */ | |
1317 | #ifndef CLOCK_MONOTONIC_RAW | |
1318 | #define CLOCK_MONOTONIC_RAW 4 | |
1319 | #endif | |
1320 | #ifndef CLOCK_BOOTTIME | |
1321 | #define CLOCK_BOOTTIME 7 | |
1322 | #endif | |
1323 | #ifndef CLOCK_TAI | |
1324 | #define CLOCK_TAI 11 | |
1325 | #endif | |
1326 | ||
1327 | static const struct clockid_map clockids[] = { | |
1328 | /* available for all events, NMI safe */ | |
1329 | CLOCKID_MAP("monotonic", CLOCK_MONOTONIC), | |
1330 | CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW), | |
1331 | ||
1332 | /* available for some events */ | |
1333 | CLOCKID_MAP("realtime", CLOCK_REALTIME), | |
1334 | CLOCKID_MAP("boottime", CLOCK_BOOTTIME), | |
1335 | CLOCKID_MAP("tai", CLOCK_TAI), | |
1336 | ||
1337 | /* available for the lazy */ | |
1338 | CLOCKID_MAP("mono", CLOCK_MONOTONIC), | |
1339 | CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW), | |
1340 | CLOCKID_MAP("real", CLOCK_REALTIME), | |
1341 | CLOCKID_MAP("boot", CLOCK_BOOTTIME), | |
1342 | ||
1343 | CLOCKID_END, | |
1344 | }; | |
1345 | ||
cf790516 AB |
1346 | static int get_clockid_res(clockid_t clk_id, u64 *res_ns) |
1347 | { | |
1348 | struct timespec res; | |
1349 | ||
1350 | *res_ns = 0; | |
1351 | if (!clock_getres(clk_id, &res)) | |
1352 | *res_ns = res.tv_nsec + res.tv_sec * NSEC_PER_SEC; | |
1353 | else | |
1354 | pr_warning("WARNING: Failed to determine specified clock resolution.\n"); | |
1355 | ||
1356 | return 0; | |
1357 | } | |
1358 | ||
814c8c38 PZ |
1359 | static int parse_clockid(const struct option *opt, const char *str, int unset) |
1360 | { | |
1361 | struct record_opts *opts = (struct record_opts *)opt->value; | |
1362 | const struct clockid_map *cm; | |
1363 | const char *ostr = str; | |
1364 | ||
1365 | if (unset) { | |
1366 | opts->use_clockid = 0; | |
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | /* no arg passed */ | |
1371 | if (!str) | |
1372 | return 0; | |
1373 | ||
1374 | /* no setting it twice */ | |
1375 | if (opts->use_clockid) | |
1376 | return -1; | |
1377 | ||
1378 | opts->use_clockid = true; | |
1379 | ||
1380 | /* if its a number, we're done */ | |
1381 | if (sscanf(str, "%d", &opts->clockid) == 1) | |
cf790516 | 1382 | return get_clockid_res(opts->clockid, &opts->clockid_res_ns); |
814c8c38 PZ |
1383 | |
1384 | /* allow a "CLOCK_" prefix to the name */ | |
1385 | if (!strncasecmp(str, "CLOCK_", 6)) | |
1386 | str += 6; | |
1387 | ||
1388 | for (cm = clockids; cm->name; cm++) { | |
1389 | if (!strcasecmp(str, cm->name)) { | |
1390 | opts->clockid = cm->clockid; | |
cf790516 AB |
1391 | return get_clockid_res(opts->clockid, |
1392 | &opts->clockid_res_ns); | |
814c8c38 PZ |
1393 | } |
1394 | } | |
1395 | ||
1396 | opts->use_clockid = false; | |
1397 | ui__warning("unknown clockid %s, check man page\n", ostr); | |
1398 | return -1; | |
1399 | } | |
1400 | ||
e9db1310 AH |
1401 | static int record__parse_mmap_pages(const struct option *opt, |
1402 | const char *str, | |
1403 | int unset __maybe_unused) | |
1404 | { | |
1405 | struct record_opts *opts = opt->value; | |
1406 | char *s, *p; | |
1407 | unsigned int mmap_pages; | |
1408 | int ret; | |
1409 | ||
1410 | if (!str) | |
1411 | return -EINVAL; | |
1412 | ||
1413 | s = strdup(str); | |
1414 | if (!s) | |
1415 | return -ENOMEM; | |
1416 | ||
1417 | p = strchr(s, ','); | |
1418 | if (p) | |
1419 | *p = '\0'; | |
1420 | ||
1421 | if (*s) { | |
1422 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s); | |
1423 | if (ret) | |
1424 | goto out_free; | |
1425 | opts->mmap_pages = mmap_pages; | |
1426 | } | |
1427 | ||
1428 | if (!p) { | |
1429 | ret = 0; | |
1430 | goto out_free; | |
1431 | } | |
1432 | ||
1433 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1); | |
1434 | if (ret) | |
1435 | goto out_free; | |
1436 | ||
1437 | opts->auxtrace_mmap_pages = mmap_pages; | |
1438 | ||
1439 | out_free: | |
1440 | free(s); | |
1441 | return ret; | |
1442 | } | |
1443 | ||
0c582449 JO |
1444 | static void switch_output_size_warn(struct record *rec) |
1445 | { | |
1446 | u64 wakeup_size = perf_evlist__mmap_size(rec->opts.mmap_pages); | |
1447 | struct switch_output *s = &rec->switch_output; | |
1448 | ||
1449 | wakeup_size /= 2; | |
1450 | ||
1451 | if (s->size < wakeup_size) { | |
1452 | char buf[100]; | |
1453 | ||
1454 | unit_number__scnprintf(buf, sizeof(buf), wakeup_size); | |
1455 | pr_warning("WARNING: switch-output data size lower than " | |
1456 | "wakeup kernel buffer size (%s) " | |
1457 | "expect bigger perf.data sizes\n", buf); | |
1458 | } | |
1459 | } | |
1460 | ||
cb4e1ebb JO |
1461 | static int switch_output_setup(struct record *rec) |
1462 | { | |
1463 | struct switch_output *s = &rec->switch_output; | |
dc0c6127 JO |
1464 | static struct parse_tag tags_size[] = { |
1465 | { .tag = 'B', .mult = 1 }, | |
1466 | { .tag = 'K', .mult = 1 << 10 }, | |
1467 | { .tag = 'M', .mult = 1 << 20 }, | |
1468 | { .tag = 'G', .mult = 1 << 30 }, | |
1469 | { .tag = 0 }, | |
1470 | }; | |
bfacbe3b JO |
1471 | static struct parse_tag tags_time[] = { |
1472 | { .tag = 's', .mult = 1 }, | |
1473 | { .tag = 'm', .mult = 60 }, | |
1474 | { .tag = 'h', .mult = 60*60 }, | |
1475 | { .tag = 'd', .mult = 60*60*24 }, | |
1476 | { .tag = 0 }, | |
1477 | }; | |
dc0c6127 | 1478 | unsigned long val; |
cb4e1ebb JO |
1479 | |
1480 | if (!s->set) | |
1481 | return 0; | |
1482 | ||
1483 | if (!strcmp(s->str, "signal")) { | |
1484 | s->signal = true; | |
1485 | pr_debug("switch-output with SIGUSR2 signal\n"); | |
dc0c6127 JO |
1486 | goto enabled; |
1487 | } | |
1488 | ||
1489 | val = parse_tag_value(s->str, tags_size); | |
1490 | if (val != (unsigned long) -1) { | |
1491 | s->size = val; | |
1492 | pr_debug("switch-output with %s size threshold\n", s->str); | |
1493 | goto enabled; | |
cb4e1ebb JO |
1494 | } |
1495 | ||
bfacbe3b JO |
1496 | val = parse_tag_value(s->str, tags_time); |
1497 | if (val != (unsigned long) -1) { | |
1498 | s->time = val; | |
1499 | pr_debug("switch-output with %s time threshold (%lu seconds)\n", | |
1500 | s->str, s->time); | |
1501 | goto enabled; | |
1502 | } | |
1503 | ||
cb4e1ebb | 1504 | return -1; |
dc0c6127 JO |
1505 | |
1506 | enabled: | |
1507 | rec->timestamp_filename = true; | |
1508 | s->enabled = true; | |
0c582449 JO |
1509 | |
1510 | if (s->size && !rec->opts.no_buffering) | |
1511 | switch_output_size_warn(rec); | |
1512 | ||
dc0c6127 | 1513 | return 0; |
cb4e1ebb JO |
1514 | } |
1515 | ||
e5b2c207 | 1516 | static const char * const __record_usage[] = { |
9e096753 MG |
1517 | "perf record [<options>] [<command>]", |
1518 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
1519 | NULL |
1520 | }; | |
e5b2c207 | 1521 | const char * const *record_usage = __record_usage; |
0e9b20b8 | 1522 | |
d20deb64 | 1523 | /* |
8c6f45a7 ACM |
1524 | * XXX Ideally would be local to cmd_record() and passed to a record__new |
1525 | * because we need to have access to it in record__exit, that is called | |
d20deb64 ACM |
1526 | * after cmd_record() exits, but since record_options need to be accessible to |
1527 | * builtin-script, leave it here. | |
1528 | * | |
1529 | * At least we don't ouch it in all the other functions here directly. | |
1530 | * | |
1531 | * Just say no to tons of global variables, sigh. | |
1532 | */ | |
8c6f45a7 | 1533 | static struct record record = { |
d20deb64 | 1534 | .opts = { |
8affc2b8 | 1535 | .sample_time = true, |
d20deb64 ACM |
1536 | .mmap_pages = UINT_MAX, |
1537 | .user_freq = UINT_MAX, | |
1538 | .user_interval = ULLONG_MAX, | |
447a6013 | 1539 | .freq = 4000, |
d1cb9fce NK |
1540 | .target = { |
1541 | .uses_mmap = true, | |
3aa5939d | 1542 | .default_per_cpu = true, |
d1cb9fce | 1543 | }, |
9d9cad76 | 1544 | .proc_map_timeout = 500, |
d20deb64 | 1545 | }, |
e3d59112 NK |
1546 | .tool = { |
1547 | .sample = process_sample_event, | |
1548 | .fork = perf_event__process_fork, | |
cca8482c | 1549 | .exit = perf_event__process_exit, |
e3d59112 | 1550 | .comm = perf_event__process_comm, |
f3b3614a | 1551 | .namespaces = perf_event__process_namespaces, |
e3d59112 NK |
1552 | .mmap = perf_event__process_mmap, |
1553 | .mmap2 = perf_event__process_mmap2, | |
cca8482c | 1554 | .ordered_events = true, |
e3d59112 | 1555 | }, |
d20deb64 | 1556 | }; |
7865e817 | 1557 | |
76a26549 NK |
1558 | const char record_callchain_help[] = CALLCHAIN_RECORD_HELP |
1559 | "\n\t\t\t\tDefault: fp"; | |
61eaa3be | 1560 | |
0aab2136 WN |
1561 | static bool dry_run; |
1562 | ||
d20deb64 ACM |
1563 | /* |
1564 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
1565 | * with it and switch to use the library functions in perf_evlist that came | |
b4006796 | 1566 | * from builtin-record.c, i.e. use record_opts, |
d20deb64 ACM |
1567 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', |
1568 | * using pipes, etc. | |
1569 | */ | |
efd21307 | 1570 | static struct option __record_options[] = { |
d20deb64 | 1571 | OPT_CALLBACK('e', "event", &record.evlist, "event", |
86847b62 | 1572 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 1573 | parse_events_option), |
d20deb64 | 1574 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
c171b552 | 1575 | "event filter", parse_filter), |
4ba1faa1 WN |
1576 | OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist, |
1577 | NULL, "don't record events from perf itself", | |
1578 | exclude_perf), | |
bea03405 | 1579 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", |
d6d901c2 | 1580 | "record events on existing process id"), |
bea03405 | 1581 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", |
d6d901c2 | 1582 | "record events on existing thread id"), |
d20deb64 | 1583 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
0e9b20b8 | 1584 | "collect data with this RT SCHED_FIFO priority"), |
509051ea | 1585 | OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering, |
acac03fa | 1586 | "collect data without buffering"), |
d20deb64 | 1587 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
daac07b2 | 1588 | "collect raw sample records from all opened counters"), |
bea03405 | 1589 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, |
0e9b20b8 | 1590 | "system-wide collection from all CPUs"), |
bea03405 | 1591 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", |
c45c6ea2 | 1592 | "list of cpus to monitor"), |
d20deb64 | 1593 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
eae8ad80 | 1594 | OPT_STRING('o', "output", &record.data.file.path, "file", |
abaff32a | 1595 | "output file name"), |
69e7e5b0 AH |
1596 | OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit, |
1597 | &record.opts.no_inherit_set, | |
1598 | "child tasks do not inherit counters"), | |
4ea648ae WN |
1599 | OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize, |
1600 | "synthesize non-sample events at the end of output"), | |
626a6b78 | 1601 | OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"), |
b09c2364 ACM |
1602 | OPT_BOOLEAN(0, "strict-freq", &record.opts.strict_freq, |
1603 | "Fail if the specified frequency can't be used"), | |
67230479 ACM |
1604 | OPT_CALLBACK('F', "freq", &record.opts, "freq or 'max'", |
1605 | "profile at this frequency", | |
1606 | record__parse_freq), | |
e9db1310 AH |
1607 | OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]", |
1608 | "number of mmap data pages and AUX area tracing mmap pages", | |
1609 | record__parse_mmap_pages), | |
d20deb64 | 1610 | OPT_BOOLEAN(0, "group", &record.opts.group, |
43bece79 | 1611 | "put the counters into a counter group"), |
2ddd5c04 | 1612 | OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, |
09b0fd45 JO |
1613 | NULL, "enables call-graph recording" , |
1614 | &record_callchain_opt), | |
1615 | OPT_CALLBACK(0, "call-graph", &record.opts, | |
76a26549 | 1616 | "record_mode[,record_size]", record_callchain_help, |
09b0fd45 | 1617 | &record_parse_callchain_opt), |
c0555642 | 1618 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 1619 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 1620 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
d20deb64 | 1621 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
649c48a9 | 1622 | "per thread counts"), |
56100321 | 1623 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"), |
3b0a5daa KL |
1624 | OPT_BOOLEAN(0, "phys-data", &record.opts.sample_phys_addr, |
1625 | "Record the sample physical addresses"), | |
b6f35ed7 | 1626 | OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"), |
3abebc55 AH |
1627 | OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time, |
1628 | &record.opts.sample_time_set, | |
1629 | "Record the sample timestamps"), | |
f290aa1f JO |
1630 | OPT_BOOLEAN_SET('P', "period", &record.opts.period, &record.opts.period_set, |
1631 | "Record the sample period"), | |
d20deb64 | 1632 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, |
649c48a9 | 1633 | "don't sample"), |
d2db9a98 WN |
1634 | OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache, |
1635 | &record.no_buildid_cache_set, | |
1636 | "do not update the buildid cache"), | |
1637 | OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid, | |
1638 | &record.no_buildid_set, | |
1639 | "do not collect buildids in perf.data"), | |
d20deb64 | 1640 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
023695d9 SE |
1641 | "monitor event in cgroup name only", |
1642 | parse_cgroups), | |
a6205a35 | 1643 | OPT_UINTEGER('D', "delay", &record.opts.initial_delay, |
6619a53e | 1644 | "ms to wait before starting measurement after program start"), |
bea03405 NK |
1645 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", |
1646 | "user to profile"), | |
a5aabdac SE |
1647 | |
1648 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, | |
1649 | "branch any", "sample any taken branches", | |
1650 | parse_branch_stack), | |
1651 | ||
1652 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, | |
1653 | "branch filter mask", "branch stack filter modes", | |
bdfebd84 | 1654 | parse_branch_stack), |
05484298 AK |
1655 | OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, |
1656 | "sample by weight (on special events only)"), | |
475eeab9 AK |
1657 | OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction, |
1658 | "sample transaction flags (special events only)"), | |
3aa5939d AH |
1659 | OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, |
1660 | "use per-thread mmaps"), | |
bcc84ec6 SE |
1661 | OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register", |
1662 | "sample selected machine registers on interrupt," | |
1663 | " use -I ? to list register names", parse_regs), | |
84c41742 AK |
1664 | OPT_CALLBACK_OPTARG(0, "user-regs", &record.opts.sample_user_regs, NULL, "any register", |
1665 | "sample selected machine registers on interrupt," | |
1666 | " use -I ? to list register names", parse_regs), | |
85c273d2 AK |
1667 | OPT_BOOLEAN(0, "running-time", &record.opts.running_time, |
1668 | "Record running/enabled time of read (:S) events"), | |
814c8c38 PZ |
1669 | OPT_CALLBACK('k', "clockid", &record.opts, |
1670 | "clockid", "clockid to use for events, see clock_gettime()", | |
1671 | parse_clockid), | |
2dd6d8a1 AH |
1672 | OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts, |
1673 | "opts", "AUX area tracing Snapshot Mode", ""), | |
9d9cad76 KL |
1674 | OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout, |
1675 | "per thread proc mmap processing timeout in ms"), | |
f3b3614a HB |
1676 | OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces, |
1677 | "Record namespaces events"), | |
b757bb09 AH |
1678 | OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events, |
1679 | "Record context switch events"), | |
85723885 JO |
1680 | OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel, |
1681 | "Configure all used events to run in kernel space.", | |
1682 | PARSE_OPT_EXCLUSIVE), | |
1683 | OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user, | |
1684 | "Configure all used events to run in user space.", | |
1685 | PARSE_OPT_EXCLUSIVE), | |
71dc2326 WN |
1686 | OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path", |
1687 | "clang binary to use for compiling BPF scriptlets"), | |
1688 | OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options", | |
1689 | "options passed to clang when compiling BPF scriptlets"), | |
7efe0e03 HK |
1690 | OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name, |
1691 | "file", "vmlinux pathname"), | |
6156681b NK |
1692 | OPT_BOOLEAN(0, "buildid-all", &record.buildid_all, |
1693 | "Record build-id of all DSOs regardless of hits"), | |
ecfd7a9c WN |
1694 | OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, |
1695 | "append timestamp to output filename"), | |
68588baf JY |
1696 | OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary, |
1697 | "Record timestamp boundary (time of first/last samples)"), | |
cb4e1ebb | 1698 | OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str, |
bfacbe3b JO |
1699 | &record.switch_output.set, "signal,size,time", |
1700 | "Switch output when receive SIGUSR2 or cross size,time threshold", | |
dc0c6127 | 1701 | "signal"), |
0aab2136 WN |
1702 | OPT_BOOLEAN(0, "dry-run", &dry_run, |
1703 | "Parse options then exit"), | |
0e9b20b8 IM |
1704 | OPT_END() |
1705 | }; | |
1706 | ||
e5b2c207 NK |
1707 | struct option *record_options = __record_options; |
1708 | ||
b0ad8ea6 | 1709 | int cmd_record(int argc, const char **argv) |
0e9b20b8 | 1710 | { |
ef149c25 | 1711 | int err; |
8c6f45a7 | 1712 | struct record *rec = &record; |
16ad2ffb | 1713 | char errbuf[BUFSIZ]; |
0e9b20b8 | 1714 | |
67230479 ACM |
1715 | setlocale(LC_ALL, ""); |
1716 | ||
48e1cab1 WN |
1717 | #ifndef HAVE_LIBBPF_SUPPORT |
1718 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c) | |
1719 | set_nobuild('\0', "clang-path", true); | |
1720 | set_nobuild('\0', "clang-opt", true); | |
1721 | # undef set_nobuild | |
7efe0e03 HK |
1722 | #endif |
1723 | ||
1724 | #ifndef HAVE_BPF_PROLOGUE | |
1725 | # if !defined (HAVE_DWARF_SUPPORT) | |
1726 | # define REASON "NO_DWARF=1" | |
1727 | # elif !defined (HAVE_LIBBPF_SUPPORT) | |
1728 | # define REASON "NO_LIBBPF=1" | |
1729 | # else | |
1730 | # define REASON "this architecture doesn't support BPF prologue" | |
1731 | # endif | |
1732 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c) | |
1733 | set_nobuild('\0', "vmlinux", true); | |
1734 | # undef set_nobuild | |
1735 | # undef REASON | |
48e1cab1 WN |
1736 | #endif |
1737 | ||
3e2be2da ACM |
1738 | rec->evlist = perf_evlist__new(); |
1739 | if (rec->evlist == NULL) | |
361c99a6 ACM |
1740 | return -ENOMEM; |
1741 | ||
ecc4c561 ACM |
1742 | err = perf_config(perf_record_config, rec); |
1743 | if (err) | |
1744 | return err; | |
eb853e80 | 1745 | |
bca647aa | 1746 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 1747 | PARSE_OPT_STOP_AT_NON_OPTION); |
68ba3235 NK |
1748 | if (quiet) |
1749 | perf_quiet_option(); | |
483635a9 JO |
1750 | |
1751 | /* Make system wide (-a) the default target. */ | |
602ad878 | 1752 | if (!argc && target__none(&rec->opts.target)) |
483635a9 | 1753 | rec->opts.target.system_wide = true; |
0e9b20b8 | 1754 | |
bea03405 | 1755 | if (nr_cgroups && !rec->opts.target.system_wide) { |
c7118369 NK |
1756 | usage_with_options_msg(record_usage, record_options, |
1757 | "cgroup monitoring only available in system-wide mode"); | |
1758 | ||
023695d9 | 1759 | } |
b757bb09 AH |
1760 | if (rec->opts.record_switch_events && |
1761 | !perf_can_record_switch_events()) { | |
c7118369 NK |
1762 | ui__error("kernel does not support recording context switch events\n"); |
1763 | parse_options_usage(record_usage, record_options, "switch-events", 0); | |
1764 | return -EINVAL; | |
b757bb09 | 1765 | } |
023695d9 | 1766 | |
cb4e1ebb JO |
1767 | if (switch_output_setup(rec)) { |
1768 | parse_options_usage(record_usage, record_options, "switch-output", 0); | |
1769 | return -EINVAL; | |
1770 | } | |
1771 | ||
bfacbe3b JO |
1772 | if (rec->switch_output.time) { |
1773 | signal(SIGALRM, alarm_sig_handler); | |
1774 | alarm(rec->switch_output.time); | |
1775 | } | |
1776 | ||
1b36c03e AH |
1777 | /* |
1778 | * Allow aliases to facilitate the lookup of symbols for address | |
1779 | * filters. Refer to auxtrace_parse_filters(). | |
1780 | */ | |
1781 | symbol_conf.allow_aliases = true; | |
1782 | ||
1783 | symbol__init(NULL); | |
1784 | ||
4b5ea3bd | 1785 | err = record__auxtrace_init(rec); |
1b36c03e AH |
1786 | if (err) |
1787 | goto out; | |
1788 | ||
0aab2136 | 1789 | if (dry_run) |
5c01ad60 | 1790 | goto out; |
0aab2136 | 1791 | |
d7888573 WN |
1792 | err = bpf__setup_stdout(rec->evlist); |
1793 | if (err) { | |
1794 | bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf)); | |
1795 | pr_err("ERROR: Setup BPF stdout failed: %s\n", | |
1796 | errbuf); | |
5c01ad60 | 1797 | goto out; |
d7888573 WN |
1798 | } |
1799 | ||
ef149c25 AH |
1800 | err = -ENOMEM; |
1801 | ||
6c443954 | 1802 | if (symbol_conf.kptr_restrict && !perf_evlist__exclude_kernel(rec->evlist)) |
646aaea6 ACM |
1803 | pr_warning( |
1804 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
1805 | "check /proc/sys/kernel/kptr_restrict.\n\n" | |
1806 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
1807 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
1808 | "Samples in kernel modules won't be resolved at all.\n\n" | |
1809 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
1810 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
ec80fde7 | 1811 | |
0c1d46a8 | 1812 | if (rec->no_buildid_cache || rec->no_buildid) { |
a1ac1d3c | 1813 | disable_buildid_cache(); |
dc0c6127 | 1814 | } else if (rec->switch_output.enabled) { |
0c1d46a8 WN |
1815 | /* |
1816 | * In 'perf record --switch-output', disable buildid | |
1817 | * generation by default to reduce data file switching | |
1818 | * overhead. Still generate buildid if they are required | |
1819 | * explicitly using | |
1820 | * | |
60437ac0 | 1821 | * perf record --switch-output --no-no-buildid \ |
0c1d46a8 WN |
1822 | * --no-no-buildid-cache |
1823 | * | |
1824 | * Following code equals to: | |
1825 | * | |
1826 | * if ((rec->no_buildid || !rec->no_buildid_set) && | |
1827 | * (rec->no_buildid_cache || !rec->no_buildid_cache_set)) | |
1828 | * disable_buildid_cache(); | |
1829 | */ | |
1830 | bool disable = true; | |
1831 | ||
1832 | if (rec->no_buildid_set && !rec->no_buildid) | |
1833 | disable = false; | |
1834 | if (rec->no_buildid_cache_set && !rec->no_buildid_cache) | |
1835 | disable = false; | |
1836 | if (disable) { | |
1837 | rec->no_buildid = true; | |
1838 | rec->no_buildid_cache = true; | |
1839 | disable_buildid_cache(); | |
1840 | } | |
1841 | } | |
655000e7 | 1842 | |
4ea648ae WN |
1843 | if (record.opts.overwrite) |
1844 | record.opts.tail_synthesize = true; | |
1845 | ||
3e2be2da | 1846 | if (rec->evlist->nr_entries == 0 && |
4b4cd503 | 1847 | __perf_evlist__add_default(rec->evlist, !record.opts.no_samples) < 0) { |
69aad6f1 | 1848 | pr_err("Not enough memory for event selector list\n"); |
394c01ed | 1849 | goto out; |
bbd36e5e | 1850 | } |
0e9b20b8 | 1851 | |
69e7e5b0 AH |
1852 | if (rec->opts.target.tid && !rec->opts.no_inherit_set) |
1853 | rec->opts.no_inherit = true; | |
1854 | ||
602ad878 | 1855 | err = target__validate(&rec->opts.target); |
16ad2ffb | 1856 | if (err) { |
602ad878 | 1857 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
c3dec27b | 1858 | ui__warning("%s\n", errbuf); |
16ad2ffb NK |
1859 | } |
1860 | ||
602ad878 | 1861 | err = target__parse_uid(&rec->opts.target); |
16ad2ffb NK |
1862 | if (err) { |
1863 | int saved_errno = errno; | |
4bd0f2d2 | 1864 | |
602ad878 | 1865 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
3780f488 | 1866 | ui__error("%s", errbuf); |
16ad2ffb NK |
1867 | |
1868 | err = -saved_errno; | |
394c01ed | 1869 | goto out; |
16ad2ffb | 1870 | } |
0d37aa34 | 1871 | |
ca800068 MZ |
1872 | /* Enable ignoring missing threads when -u/-p option is defined. */ |
1873 | rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX || rec->opts.target.pid; | |
23dc4f15 | 1874 | |
16ad2ffb | 1875 | err = -ENOMEM; |
3e2be2da | 1876 | if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0) |
dd7927f4 | 1877 | usage_with_options(record_usage, record_options); |
69aad6f1 | 1878 | |
ef149c25 AH |
1879 | err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts); |
1880 | if (err) | |
394c01ed | 1881 | goto out; |
ef149c25 | 1882 | |
6156681b NK |
1883 | /* |
1884 | * We take all buildids when the file contains | |
1885 | * AUX area tracing data because we do not decode the | |
1886 | * trace because it would take too long. | |
1887 | */ | |
1888 | if (rec->opts.full_auxtrace) | |
1889 | rec->buildid_all = true; | |
1890 | ||
b4006796 | 1891 | if (record_opts__config(&rec->opts)) { |
39d17dac | 1892 | err = -EINVAL; |
394c01ed | 1893 | goto out; |
7e4ff9e3 MG |
1894 | } |
1895 | ||
d20deb64 | 1896 | err = __cmd_record(&record, argc, argv); |
394c01ed | 1897 | out: |
45604710 | 1898 | perf_evlist__delete(rec->evlist); |
d65a458b | 1899 | symbol__exit(); |
ef149c25 | 1900 | auxtrace_record__free(rec->itr); |
39d17dac | 1901 | return err; |
0e9b20b8 | 1902 | } |
2dd6d8a1 AH |
1903 | |
1904 | static void snapshot_sig_handler(int sig __maybe_unused) | |
1905 | { | |
dc0c6127 JO |
1906 | struct record *rec = &record; |
1907 | ||
5f9cf599 WN |
1908 | if (trigger_is_ready(&auxtrace_snapshot_trigger)) { |
1909 | trigger_hit(&auxtrace_snapshot_trigger); | |
1910 | auxtrace_record__snapshot_started = 1; | |
1911 | if (auxtrace_record__snapshot_start(record.itr)) | |
1912 | trigger_error(&auxtrace_snapshot_trigger); | |
1913 | } | |
3c1cb7e3 | 1914 | |
dc0c6127 | 1915 | if (switch_output_signal(rec)) |
3c1cb7e3 | 1916 | trigger_hit(&switch_output_trigger); |
2dd6d8a1 | 1917 | } |
bfacbe3b JO |
1918 | |
1919 | static void alarm_sig_handler(int sig __maybe_unused) | |
1920 | { | |
1921 | struct record *rec = &record; | |
1922 | ||
1923 | if (switch_output_time(rec)) | |
1924 | trigger_hit(&switch_output_trigger); | |
1925 | } |