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> |
4208735d | 48 | #include <poll.h> |
97124d5e | 49 | #include <unistd.h> |
de9ac07b | 50 | #include <sched.h> |
9607ad3a | 51 | #include <signal.h> |
a41794cd | 52 | #include <sys/mman.h> |
4208735d | 53 | #include <sys/wait.h> |
2d11c650 | 54 | #include <asm/bug.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; | |
74 | const char *progname; | |
d20deb64 | 75 | int realtime_prio; |
d20deb64 | 76 | bool no_buildid; |
d2db9a98 | 77 | bool no_buildid_set; |
d20deb64 | 78 | bool no_buildid_cache; |
d2db9a98 | 79 | bool no_buildid_cache_set; |
6156681b | 80 | bool buildid_all; |
ecfd7a9c | 81 | bool timestamp_filename; |
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 | ||
8c6f45a7 | 109 | static int record__write(struct record *rec, void *bf, size_t size) |
f5970550 | 110 | { |
8ceb41d7 | 111 | if (perf_data__write(rec->session->data, bf, size) < 0) { |
50a9b868 JO |
112 | pr_err("failed to write perf data, error: %m\n"); |
113 | return -1; | |
f5970550 | 114 | } |
8d3eca20 | 115 | |
cf8b2e69 | 116 | rec->bytes_written += size; |
dc0c6127 JO |
117 | |
118 | if (switch_output_size(rec)) | |
119 | trigger_hit(&switch_output_trigger); | |
120 | ||
8d3eca20 | 121 | return 0; |
f5970550 PZ |
122 | } |
123 | ||
45694aa7 | 124 | static int process_synthesized_event(struct perf_tool *tool, |
d20deb64 | 125 | union perf_event *event, |
1d037ca1 IT |
126 | struct perf_sample *sample __maybe_unused, |
127 | struct machine *machine __maybe_unused) | |
234fbbf5 | 128 | { |
8c6f45a7 ACM |
129 | struct record *rec = container_of(tool, struct record, tool); |
130 | return record__write(rec, event, event->header.size); | |
234fbbf5 ACM |
131 | } |
132 | ||
d37f1586 ACM |
133 | static int record__pushfn(void *to, void *bf, size_t size) |
134 | { | |
135 | struct record *rec = to; | |
136 | ||
137 | rec->samples++; | |
138 | return record__write(rec, bf, size); | |
139 | } | |
140 | ||
2dd6d8a1 AH |
141 | static volatile int done; |
142 | static volatile int signr = -1; | |
143 | static volatile int child_finished; | |
c0bdc1c4 | 144 | |
2dd6d8a1 AH |
145 | static void sig_handler(int sig) |
146 | { | |
147 | if (sig == SIGCHLD) | |
148 | child_finished = 1; | |
149 | else | |
150 | signr = sig; | |
151 | ||
152 | done = 1; | |
153 | } | |
154 | ||
a074865e WN |
155 | static void sigsegv_handler(int sig) |
156 | { | |
157 | perf_hooks__recover(); | |
158 | sighandler_dump_stack(sig); | |
159 | } | |
160 | ||
2dd6d8a1 AH |
161 | static void record__sig_exit(void) |
162 | { | |
163 | if (signr == -1) | |
164 | return; | |
165 | ||
166 | signal(signr, SIG_DFL); | |
167 | raise(signr); | |
168 | } | |
169 | ||
e31f0d01 AH |
170 | #ifdef HAVE_AUXTRACE_SUPPORT |
171 | ||
ef149c25 AH |
172 | static int record__process_auxtrace(struct perf_tool *tool, |
173 | union perf_event *event, void *data1, | |
174 | size_t len1, void *data2, size_t len2) | |
175 | { | |
176 | struct record *rec = container_of(tool, struct record, tool); | |
8ceb41d7 | 177 | struct perf_data *data = &rec->data; |
ef149c25 AH |
178 | size_t padding; |
179 | u8 pad[8] = {0}; | |
180 | ||
8ceb41d7 | 181 | if (!perf_data__is_pipe(data)) { |
99fa2984 | 182 | off_t file_offset; |
8ceb41d7 | 183 | int fd = perf_data__fd(data); |
99fa2984 AH |
184 | int err; |
185 | ||
186 | file_offset = lseek(fd, 0, SEEK_CUR); | |
187 | if (file_offset == -1) | |
188 | return -1; | |
189 | err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index, | |
190 | event, file_offset); | |
191 | if (err) | |
192 | return err; | |
193 | } | |
194 | ||
ef149c25 AH |
195 | /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */ |
196 | padding = (len1 + len2) & 7; | |
197 | if (padding) | |
198 | padding = 8 - padding; | |
199 | ||
200 | record__write(rec, event, event->header.size); | |
201 | record__write(rec, data1, len1); | |
202 | if (len2) | |
203 | record__write(rec, data2, len2); | |
204 | record__write(rec, &pad, padding); | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
209 | static int record__auxtrace_mmap_read(struct record *rec, | |
210 | struct auxtrace_mmap *mm) | |
211 | { | |
212 | int ret; | |
213 | ||
214 | ret = auxtrace_mmap__read(mm, rec->itr, &rec->tool, | |
215 | record__process_auxtrace); | |
216 | if (ret < 0) | |
217 | return ret; | |
218 | ||
219 | if (ret) | |
220 | rec->samples++; | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
2dd6d8a1 AH |
225 | static int record__auxtrace_mmap_read_snapshot(struct record *rec, |
226 | struct auxtrace_mmap *mm) | |
227 | { | |
228 | int ret; | |
229 | ||
230 | ret = auxtrace_mmap__read_snapshot(mm, rec->itr, &rec->tool, | |
231 | record__process_auxtrace, | |
232 | rec->opts.auxtrace_snapshot_size); | |
233 | if (ret < 0) | |
234 | return ret; | |
235 | ||
236 | if (ret) | |
237 | rec->samples++; | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | static int record__auxtrace_read_snapshot_all(struct record *rec) | |
243 | { | |
244 | int i; | |
245 | int rc = 0; | |
246 | ||
247 | for (i = 0; i < rec->evlist->nr_mmaps; i++) { | |
248 | struct auxtrace_mmap *mm = | |
249 | &rec->evlist->mmap[i].auxtrace_mmap; | |
250 | ||
251 | if (!mm->base) | |
252 | continue; | |
253 | ||
254 | if (record__auxtrace_mmap_read_snapshot(rec, mm) != 0) { | |
255 | rc = -1; | |
256 | goto out; | |
257 | } | |
258 | } | |
259 | out: | |
260 | return rc; | |
261 | } | |
262 | ||
263 | static void record__read_auxtrace_snapshot(struct record *rec) | |
264 | { | |
265 | pr_debug("Recording AUX area tracing snapshot\n"); | |
266 | if (record__auxtrace_read_snapshot_all(rec) < 0) { | |
5f9cf599 | 267 | trigger_error(&auxtrace_snapshot_trigger); |
2dd6d8a1 | 268 | } else { |
5f9cf599 WN |
269 | if (auxtrace_record__snapshot_finish(rec->itr)) |
270 | trigger_error(&auxtrace_snapshot_trigger); | |
271 | else | |
272 | trigger_ready(&auxtrace_snapshot_trigger); | |
2dd6d8a1 AH |
273 | } |
274 | } | |
275 | ||
e31f0d01 AH |
276 | #else |
277 | ||
278 | static inline | |
279 | int record__auxtrace_mmap_read(struct record *rec __maybe_unused, | |
280 | struct auxtrace_mmap *mm __maybe_unused) | |
281 | { | |
282 | return 0; | |
283 | } | |
284 | ||
2dd6d8a1 AH |
285 | static inline |
286 | void record__read_auxtrace_snapshot(struct record *rec __maybe_unused) | |
de9ac07b | 287 | { |
f7b7c26e PZ |
288 | } |
289 | ||
2dd6d8a1 AH |
290 | static inline |
291 | int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused) | |
f7b7c26e | 292 | { |
2dd6d8a1 | 293 | return 0; |
de9ac07b PZ |
294 | } |
295 | ||
2dd6d8a1 AH |
296 | #endif |
297 | ||
cda57a8c WN |
298 | static int record__mmap_evlist(struct record *rec, |
299 | struct perf_evlist *evlist) | |
300 | { | |
301 | struct record_opts *opts = &rec->opts; | |
302 | char msg[512]; | |
303 | ||
304 | if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false, | |
305 | opts->auxtrace_mmap_pages, | |
306 | opts->auxtrace_snapshot_mode) < 0) { | |
307 | if (errno == EPERM) { | |
308 | pr_err("Permission error mapping pages.\n" | |
309 | "Consider increasing " | |
310 | "/proc/sys/kernel/perf_event_mlock_kb,\n" | |
311 | "or try again with a smaller value of -m/--mmap_pages.\n" | |
312 | "(current value: %u,%u)\n", | |
313 | opts->mmap_pages, opts->auxtrace_mmap_pages); | |
314 | return -errno; | |
315 | } else { | |
316 | pr_err("failed to mmap with %d (%s)\n", errno, | |
c8b5f2c9 | 317 | str_error_r(errno, msg, sizeof(msg))); |
cda57a8c WN |
318 | if (errno) |
319 | return -errno; | |
320 | else | |
321 | return -EINVAL; | |
322 | } | |
323 | } | |
324 | return 0; | |
325 | } | |
326 | ||
327 | static int record__mmap(struct record *rec) | |
328 | { | |
329 | return record__mmap_evlist(rec, rec->evlist); | |
330 | } | |
331 | ||
8c6f45a7 | 332 | static int record__open(struct record *rec) |
dd7927f4 | 333 | { |
d6195a6a | 334 | char msg[BUFSIZ]; |
6a4bb04c | 335 | struct perf_evsel *pos; |
d20deb64 ACM |
336 | struct perf_evlist *evlist = rec->evlist; |
337 | struct perf_session *session = rec->session; | |
b4006796 | 338 | struct record_opts *opts = &rec->opts; |
5d8bb1ec | 339 | struct perf_evsel_config_term *err_term; |
8d3eca20 | 340 | int rc = 0; |
dd7927f4 | 341 | |
dffdcbdb ACM |
342 | /* |
343 | * For initial_delay we need to add a dummy event so that we can track | |
344 | * PERF_RECORD_MMAP while we wait for the initial delay to enable the | |
345 | * real events, the ones asked by the user. | |
346 | */ | |
347 | if (opts->initial_delay) { | |
348 | if (perf_evlist__add_dummy(evlist)) | |
349 | return -ENOMEM; | |
350 | ||
351 | pos = perf_evlist__first(evlist); | |
352 | pos->tracking = 0; | |
353 | pos = perf_evlist__last(evlist); | |
354 | pos->tracking = 1; | |
355 | pos->attr.enable_on_exec = 1; | |
356 | } | |
357 | ||
e68ae9cf | 358 | perf_evlist__config(evlist, opts, &callchain_param); |
cac21425 | 359 | |
e5cadb93 | 360 | evlist__for_each_entry(evlist, pos) { |
dd7927f4 | 361 | try_again: |
d988d5ee | 362 | if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) { |
56e52e85 | 363 | if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) { |
bb963e16 | 364 | if (verbose > 0) |
c0a54341 | 365 | ui__warning("%s\n", msg); |
d6d901c2 ZY |
366 | goto try_again; |
367 | } | |
ca6a4258 | 368 | |
56e52e85 ACM |
369 | rc = -errno; |
370 | perf_evsel__open_strerror(pos, &opts->target, | |
371 | errno, msg, sizeof(msg)); | |
372 | ui__error("%s\n", msg); | |
8d3eca20 | 373 | goto out; |
c171b552 LZ |
374 | } |
375 | } | |
a43d3f08 | 376 | |
23d4aad4 | 377 | if (perf_evlist__apply_filters(evlist, &pos)) { |
62d94b00 | 378 | pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", |
23d4aad4 | 379 | pos->filter, perf_evsel__name(pos), errno, |
c8b5f2c9 | 380 | str_error_r(errno, msg, sizeof(msg))); |
8d3eca20 | 381 | rc = -1; |
5d8bb1ec MP |
382 | goto out; |
383 | } | |
384 | ||
385 | if (perf_evlist__apply_drv_configs(evlist, &pos, &err_term)) { | |
62d94b00 | 386 | pr_err("failed to set config \"%s\" on event %s with %d (%s)\n", |
5d8bb1ec MP |
387 | err_term->val.drv_cfg, perf_evsel__name(pos), errno, |
388 | str_error_r(errno, msg, sizeof(msg))); | |
389 | rc = -1; | |
8d3eca20 | 390 | goto out; |
0a102479 FW |
391 | } |
392 | ||
cda57a8c WN |
393 | rc = record__mmap(rec); |
394 | if (rc) | |
8d3eca20 | 395 | goto out; |
0a27d7f9 | 396 | |
563aecb2 | 397 | session->evlist = evlist; |
7b56cce2 | 398 | perf_session__set_id_hdr_size(session); |
8d3eca20 DA |
399 | out: |
400 | return rc; | |
16c8a109 PZ |
401 | } |
402 | ||
e3d59112 NK |
403 | static int process_sample_event(struct perf_tool *tool, |
404 | union perf_event *event, | |
405 | struct perf_sample *sample, | |
406 | struct perf_evsel *evsel, | |
407 | struct machine *machine) | |
408 | { | |
409 | struct record *rec = container_of(tool, struct record, tool); | |
410 | ||
411 | rec->samples++; | |
412 | ||
413 | return build_id__mark_dso_hit(tool, event, sample, evsel, machine); | |
414 | } | |
415 | ||
8c6f45a7 | 416 | static int process_buildids(struct record *rec) |
6122e4e4 | 417 | { |
8ceb41d7 | 418 | struct perf_data *data = &rec->data; |
f5fc1412 | 419 | struct perf_session *session = rec->session; |
6122e4e4 | 420 | |
8ceb41d7 | 421 | if (data->size == 0) |
9f591fd7 ACM |
422 | return 0; |
423 | ||
00dc8657 NK |
424 | /* |
425 | * During this process, it'll load kernel map and replace the | |
426 | * dso->long_name to a real pathname it found. In this case | |
427 | * we prefer the vmlinux path like | |
428 | * /lib/modules/3.16.4/build/vmlinux | |
429 | * | |
430 | * rather than build-id path (in debug directory). | |
431 | * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 | |
432 | */ | |
433 | symbol_conf.ignore_vmlinux_buildid = true; | |
434 | ||
6156681b NK |
435 | /* |
436 | * If --buildid-all is given, it marks all DSO regardless of hits, | |
437 | * so no need to process samples. | |
438 | */ | |
439 | if (rec->buildid_all) | |
440 | rec->tool.sample = NULL; | |
441 | ||
b7b61cbe | 442 | return perf_session__process_events(session); |
6122e4e4 ACM |
443 | } |
444 | ||
8115d60c | 445 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
446 | { |
447 | int err; | |
45694aa7 | 448 | struct perf_tool *tool = data; |
a1645ce1 ZY |
449 | /* |
450 | *As for guest kernel when processing subcommand record&report, | |
451 | *we arrange module mmap prior to guest kernel mmap and trigger | |
452 | *a preload dso because default guest module symbols are loaded | |
453 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
454 | *method is used to avoid symbol missing when the first addr is | |
455 | *in module instead of in guest kernel. | |
456 | */ | |
45694aa7 | 457 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 458 | machine); |
a1645ce1 ZY |
459 | if (err < 0) |
460 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 461 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 462 | |
a1645ce1 ZY |
463 | /* |
464 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
465 | * have no _text sometimes. | |
466 | */ | |
45694aa7 | 467 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
0ae617be | 468 | machine); |
a1645ce1 ZY |
469 | if (err < 0) |
470 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 471 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
472 | } |
473 | ||
98402807 FW |
474 | static struct perf_event_header finished_round_event = { |
475 | .size = sizeof(struct perf_event_header), | |
476 | .type = PERF_RECORD_FINISHED_ROUND, | |
477 | }; | |
478 | ||
a4ea0ec4 WN |
479 | static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist, |
480 | bool backward) | |
98402807 | 481 | { |
dcabb507 | 482 | u64 bytes_written = rec->bytes_written; |
0e2e63dd | 483 | int i; |
8d3eca20 | 484 | int rc = 0; |
a4ea0ec4 | 485 | struct perf_mmap *maps; |
98402807 | 486 | |
cb21686b WN |
487 | if (!evlist) |
488 | return 0; | |
ef149c25 | 489 | |
b2cb615d | 490 | maps = backward ? evlist->backward_mmap : evlist->mmap; |
a4ea0ec4 WN |
491 | if (!maps) |
492 | return 0; | |
493 | ||
54cc54de WN |
494 | if (backward && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING) |
495 | return 0; | |
496 | ||
cb21686b | 497 | for (i = 0; i < evlist->nr_mmaps; i++) { |
a4ea0ec4 | 498 | struct auxtrace_mmap *mm = &maps[i].auxtrace_mmap; |
cb21686b | 499 | |
a4ea0ec4 | 500 | if (maps[i].base) { |
d37f1586 | 501 | if (perf_mmap__push(&maps[i], evlist->overwrite, backward, rec, record__pushfn) != 0) { |
8d3eca20 DA |
502 | rc = -1; |
503 | goto out; | |
504 | } | |
505 | } | |
ef149c25 | 506 | |
2dd6d8a1 | 507 | if (mm->base && !rec->opts.auxtrace_snapshot_mode && |
ef149c25 AH |
508 | record__auxtrace_mmap_read(rec, mm) != 0) { |
509 | rc = -1; | |
510 | goto out; | |
511 | } | |
98402807 FW |
512 | } |
513 | ||
dcabb507 JO |
514 | /* |
515 | * Mark the round finished in case we wrote | |
516 | * at least one event. | |
517 | */ | |
518 | if (bytes_written != rec->bytes_written) | |
519 | rc = record__write(rec, &finished_round_event, sizeof(finished_round_event)); | |
8d3eca20 | 520 | |
54cc54de WN |
521 | if (backward) |
522 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); | |
8d3eca20 DA |
523 | out: |
524 | return rc; | |
98402807 FW |
525 | } |
526 | ||
cb21686b WN |
527 | static int record__mmap_read_all(struct record *rec) |
528 | { | |
529 | int err; | |
530 | ||
a4ea0ec4 | 531 | err = record__mmap_read_evlist(rec, rec->evlist, false); |
cb21686b WN |
532 | if (err) |
533 | return err; | |
534 | ||
05737464 | 535 | return record__mmap_read_evlist(rec, rec->evlist, true); |
cb21686b WN |
536 | } |
537 | ||
8c6f45a7 | 538 | static void record__init_features(struct record *rec) |
57706abc | 539 | { |
57706abc DA |
540 | struct perf_session *session = rec->session; |
541 | int feat; | |
542 | ||
543 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) | |
544 | perf_header__set_feat(&session->header, feat); | |
545 | ||
546 | if (rec->no_buildid) | |
547 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); | |
548 | ||
3e2be2da | 549 | if (!have_tracepoints(&rec->evlist->entries)) |
57706abc DA |
550 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
551 | ||
552 | if (!rec->opts.branch_stack) | |
553 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); | |
ef149c25 AH |
554 | |
555 | if (!rec->opts.full_auxtrace) | |
556 | perf_header__clear_feat(&session->header, HEADER_AUXTRACE); | |
ffa517ad JO |
557 | |
558 | perf_header__clear_feat(&session->header, HEADER_STAT); | |
57706abc DA |
559 | } |
560 | ||
e1ab48ba WN |
561 | static void |
562 | record__finish_output(struct record *rec) | |
563 | { | |
8ceb41d7 JO |
564 | struct perf_data *data = &rec->data; |
565 | int fd = perf_data__fd(data); | |
e1ab48ba | 566 | |
8ceb41d7 | 567 | if (data->is_pipe) |
e1ab48ba WN |
568 | return; |
569 | ||
570 | rec->session->header.data_size += rec->bytes_written; | |
8ceb41d7 | 571 | data->size = lseek(perf_data__fd(data), 0, SEEK_CUR); |
e1ab48ba WN |
572 | |
573 | if (!rec->no_buildid) { | |
574 | process_buildids(rec); | |
575 | ||
576 | if (rec->buildid_all) | |
577 | dsos__hit_all(rec->session); | |
578 | } | |
579 | perf_session__write_header(rec->session, rec->evlist, fd, true); | |
580 | ||
581 | return; | |
582 | } | |
583 | ||
4ea648ae | 584 | static int record__synthesize_workload(struct record *rec, bool tail) |
be7b0c9e | 585 | { |
9d6aae72 ACM |
586 | int err; |
587 | struct thread_map *thread_map; | |
be7b0c9e | 588 | |
4ea648ae WN |
589 | if (rec->opts.tail_synthesize != tail) |
590 | return 0; | |
591 | ||
9d6aae72 ACM |
592 | thread_map = thread_map__new_by_tid(rec->evlist->workload.pid); |
593 | if (thread_map == NULL) | |
594 | return -1; | |
595 | ||
596 | err = perf_event__synthesize_thread_map(&rec->tool, thread_map, | |
be7b0c9e WN |
597 | process_synthesized_event, |
598 | &rec->session->machines.host, | |
599 | rec->opts.sample_address, | |
600 | rec->opts.proc_map_timeout); | |
9d6aae72 ACM |
601 | thread_map__put(thread_map); |
602 | return err; | |
be7b0c9e WN |
603 | } |
604 | ||
4ea648ae | 605 | static int record__synthesize(struct record *rec, bool tail); |
3c1cb7e3 | 606 | |
ecfd7a9c WN |
607 | static int |
608 | record__switch_output(struct record *rec, bool at_exit) | |
609 | { | |
8ceb41d7 | 610 | struct perf_data *data = &rec->data; |
ecfd7a9c WN |
611 | int fd, err; |
612 | ||
613 | /* Same Size: "2015122520103046"*/ | |
614 | char timestamp[] = "InvalidTimestamp"; | |
615 | ||
4ea648ae WN |
616 | record__synthesize(rec, true); |
617 | if (target__none(&rec->opts.target)) | |
618 | record__synthesize_workload(rec, true); | |
619 | ||
ecfd7a9c WN |
620 | rec->samples = 0; |
621 | record__finish_output(rec); | |
622 | err = fetch_current_timestamp(timestamp, sizeof(timestamp)); | |
623 | if (err) { | |
624 | pr_err("Failed to get current timestamp\n"); | |
625 | return -EINVAL; | |
626 | } | |
627 | ||
8ceb41d7 | 628 | fd = perf_data__switch(data, timestamp, |
ecfd7a9c WN |
629 | rec->session->header.data_offset, |
630 | at_exit); | |
631 | if (fd >= 0 && !at_exit) { | |
632 | rec->bytes_written = 0; | |
633 | rec->session->header.data_size = 0; | |
634 | } | |
635 | ||
636 | if (!quiet) | |
637 | fprintf(stderr, "[ perf record: Dump %s.%s ]\n", | |
eae8ad80 | 638 | data->file.path, timestamp); |
3c1cb7e3 WN |
639 | |
640 | /* Output tracking events */ | |
be7b0c9e | 641 | if (!at_exit) { |
4ea648ae | 642 | record__synthesize(rec, false); |
3c1cb7e3 | 643 | |
be7b0c9e WN |
644 | /* |
645 | * In 'perf record --switch-output' without -a, | |
646 | * record__synthesize() in record__switch_output() won't | |
647 | * generate tracking events because there's no thread_map | |
648 | * in evlist. Which causes newly created perf.data doesn't | |
649 | * contain map and comm information. | |
650 | * Create a fake thread_map and directly call | |
651 | * perf_event__synthesize_thread_map() for those events. | |
652 | */ | |
653 | if (target__none(&rec->opts.target)) | |
4ea648ae | 654 | record__synthesize_workload(rec, false); |
be7b0c9e | 655 | } |
ecfd7a9c WN |
656 | return fd; |
657 | } | |
658 | ||
f33cbe72 ACM |
659 | static volatile int workload_exec_errno; |
660 | ||
661 | /* | |
662 | * perf_evlist__prepare_workload will send a SIGUSR1 | |
663 | * if the fork fails, since we asked by setting its | |
664 | * want_signal to true. | |
665 | */ | |
45604710 NK |
666 | static void workload_exec_failed_signal(int signo __maybe_unused, |
667 | siginfo_t *info, | |
f33cbe72 ACM |
668 | void *ucontext __maybe_unused) |
669 | { | |
670 | workload_exec_errno = info->si_value.sival_int; | |
671 | done = 1; | |
f33cbe72 ACM |
672 | child_finished = 1; |
673 | } | |
674 | ||
2dd6d8a1 | 675 | static void snapshot_sig_handler(int sig); |
bfacbe3b | 676 | static void alarm_sig_handler(int sig); |
2dd6d8a1 | 677 | |
46bc29b9 AH |
678 | int __weak |
679 | perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused, | |
680 | struct perf_tool *tool __maybe_unused, | |
681 | perf_event__handler_t process __maybe_unused, | |
682 | struct machine *machine __maybe_unused) | |
683 | { | |
684 | return 0; | |
685 | } | |
686 | ||
ee667f94 WN |
687 | static const struct perf_event_mmap_page * |
688 | perf_evlist__pick_pc(struct perf_evlist *evlist) | |
689 | { | |
b2cb615d WN |
690 | if (evlist) { |
691 | if (evlist->mmap && evlist->mmap[0].base) | |
692 | return evlist->mmap[0].base; | |
693 | if (evlist->backward_mmap && evlist->backward_mmap[0].base) | |
694 | return evlist->backward_mmap[0].base; | |
695 | } | |
ee667f94 WN |
696 | return NULL; |
697 | } | |
698 | ||
c45628b0 WN |
699 | static const struct perf_event_mmap_page *record__pick_pc(struct record *rec) |
700 | { | |
ee667f94 WN |
701 | const struct perf_event_mmap_page *pc; |
702 | ||
703 | pc = perf_evlist__pick_pc(rec->evlist); | |
704 | if (pc) | |
705 | return pc; | |
c45628b0 WN |
706 | return NULL; |
707 | } | |
708 | ||
4ea648ae | 709 | static int record__synthesize(struct record *rec, bool tail) |
c45c86eb WN |
710 | { |
711 | struct perf_session *session = rec->session; | |
712 | struct machine *machine = &session->machines.host; | |
8ceb41d7 | 713 | struct perf_data *data = &rec->data; |
c45c86eb WN |
714 | struct record_opts *opts = &rec->opts; |
715 | struct perf_tool *tool = &rec->tool; | |
8ceb41d7 | 716 | int fd = perf_data__fd(data); |
c45c86eb WN |
717 | int err = 0; |
718 | ||
4ea648ae WN |
719 | if (rec->opts.tail_synthesize != tail) |
720 | return 0; | |
721 | ||
8ceb41d7 | 722 | if (data->is_pipe) { |
e9def1b2 DCC |
723 | err = perf_event__synthesize_features( |
724 | tool, session, rec->evlist, process_synthesized_event); | |
725 | if (err < 0) { | |
726 | pr_err("Couldn't synthesize features.\n"); | |
727 | return err; | |
728 | } | |
729 | ||
c45c86eb WN |
730 | err = perf_event__synthesize_attrs(tool, session, |
731 | process_synthesized_event); | |
732 | if (err < 0) { | |
733 | pr_err("Couldn't synthesize attrs.\n"); | |
734 | goto out; | |
735 | } | |
736 | ||
737 | if (have_tracepoints(&rec->evlist->entries)) { | |
738 | /* | |
739 | * FIXME err <= 0 here actually means that | |
740 | * there were no tracepoints so its not really | |
741 | * an error, just that we don't need to | |
742 | * synthesize anything. We really have to | |
743 | * return this more properly and also | |
744 | * propagate errors that now are calling die() | |
745 | */ | |
746 | err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist, | |
747 | process_synthesized_event); | |
748 | if (err <= 0) { | |
749 | pr_err("Couldn't record tracing data.\n"); | |
750 | goto out; | |
751 | } | |
752 | rec->bytes_written += err; | |
753 | } | |
754 | } | |
755 | ||
c45628b0 | 756 | err = perf_event__synth_time_conv(record__pick_pc(rec), tool, |
46bc29b9 AH |
757 | process_synthesized_event, machine); |
758 | if (err) | |
759 | goto out; | |
760 | ||
c45c86eb WN |
761 | if (rec->opts.full_auxtrace) { |
762 | err = perf_event__synthesize_auxtrace_info(rec->itr, tool, | |
763 | session, process_synthesized_event); | |
764 | if (err) | |
765 | goto out; | |
766 | } | |
767 | ||
b0ebd811 ACM |
768 | if (!perf_evlist__exclude_kernel(rec->evlist)) { |
769 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, | |
770 | machine); | |
771 | WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n" | |
772 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
773 | "Check /proc/kallsyms permission or run as root.\n"); | |
774 | ||
775 | err = perf_event__synthesize_modules(tool, process_synthesized_event, | |
776 | machine); | |
777 | WARN_ONCE(err < 0, "Couldn't record kernel module information.\n" | |
778 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
779 | "Check /proc/modules permission or run as root.\n"); | |
780 | } | |
c45c86eb WN |
781 | |
782 | if (perf_guest) { | |
783 | machines__process_guests(&session->machines, | |
784 | perf_event__synthesize_guest_os, tool); | |
785 | } | |
786 | ||
787 | err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads, | |
788 | process_synthesized_event, opts->sample_address, | |
340b47f5 | 789 | opts->proc_map_timeout, 1); |
c45c86eb WN |
790 | out: |
791 | return err; | |
792 | } | |
793 | ||
8c6f45a7 | 794 | static int __cmd_record(struct record *rec, int argc, const char **argv) |
16c8a109 | 795 | { |
57706abc | 796 | int err; |
45604710 | 797 | int status = 0; |
8b412664 | 798 | unsigned long waking = 0; |
46be604b | 799 | const bool forks = argc > 0; |
23346f21 | 800 | struct machine *machine; |
45694aa7 | 801 | struct perf_tool *tool = &rec->tool; |
b4006796 | 802 | struct record_opts *opts = &rec->opts; |
8ceb41d7 | 803 | struct perf_data *data = &rec->data; |
d20deb64 | 804 | struct perf_session *session; |
6dcf45ef | 805 | bool disabled = false, draining = false; |
42aa276f | 806 | int fd; |
de9ac07b | 807 | |
d20deb64 | 808 | rec->progname = argv[0]; |
33e49ea7 | 809 | |
45604710 | 810 | atexit(record__sig_exit); |
f5970550 PZ |
811 | signal(SIGCHLD, sig_handler); |
812 | signal(SIGINT, sig_handler); | |
804f7ac7 | 813 | signal(SIGTERM, sig_handler); |
a074865e | 814 | signal(SIGSEGV, sigsegv_handler); |
c0bdc1c4 | 815 | |
f3b3614a HB |
816 | if (rec->opts.record_namespaces) |
817 | tool->namespace_events = true; | |
818 | ||
dc0c6127 | 819 | if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) { |
2dd6d8a1 | 820 | signal(SIGUSR2, snapshot_sig_handler); |
3c1cb7e3 WN |
821 | if (rec->opts.auxtrace_snapshot_mode) |
822 | trigger_on(&auxtrace_snapshot_trigger); | |
dc0c6127 | 823 | if (rec->switch_output.enabled) |
3c1cb7e3 | 824 | trigger_on(&switch_output_trigger); |
c0bdc1c4 | 825 | } else { |
2dd6d8a1 | 826 | signal(SIGUSR2, SIG_IGN); |
c0bdc1c4 | 827 | } |
f5970550 | 828 | |
8ceb41d7 | 829 | session = perf_session__new(data, false, tool); |
94c744b6 | 830 | if (session == NULL) { |
ffa91880 | 831 | pr_err("Perf session creation failed.\n"); |
a9a70bbc ACM |
832 | return -1; |
833 | } | |
834 | ||
8ceb41d7 | 835 | fd = perf_data__fd(data); |
d20deb64 ACM |
836 | rec->session = session; |
837 | ||
8c6f45a7 | 838 | record__init_features(rec); |
330aa675 | 839 | |
d4db3f16 | 840 | if (forks) { |
3e2be2da | 841 | err = perf_evlist__prepare_workload(rec->evlist, &opts->target, |
8ceb41d7 | 842 | argv, data->is_pipe, |
735f7e0b | 843 | workload_exec_failed_signal); |
35b9d88e ACM |
844 | if (err < 0) { |
845 | pr_err("Couldn't run the workload!\n"); | |
45604710 | 846 | status = err; |
35b9d88e | 847 | goto out_delete_session; |
856e9660 | 848 | } |
856e9660 PZ |
849 | } |
850 | ||
8c6f45a7 | 851 | if (record__open(rec) != 0) { |
8d3eca20 | 852 | err = -1; |
45604710 | 853 | goto out_child; |
8d3eca20 | 854 | } |
de9ac07b | 855 | |
8690a2a7 WN |
856 | err = bpf__apply_obj_config(); |
857 | if (err) { | |
858 | char errbuf[BUFSIZ]; | |
859 | ||
860 | bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); | |
861 | pr_err("ERROR: Apply config to BPF failed: %s\n", | |
862 | errbuf); | |
863 | goto out_child; | |
864 | } | |
865 | ||
cca8482c AH |
866 | /* |
867 | * Normally perf_session__new would do this, but it doesn't have the | |
868 | * evlist. | |
869 | */ | |
870 | if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) { | |
871 | pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n"); | |
872 | rec->tool.ordered_events = false; | |
873 | } | |
874 | ||
3e2be2da | 875 | if (!rec->evlist->nr_groups) |
a8bb559b NK |
876 | perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); |
877 | ||
8ceb41d7 | 878 | if (data->is_pipe) { |
42aa276f | 879 | err = perf_header__write_pipe(fd); |
529870e3 | 880 | if (err < 0) |
45604710 | 881 | goto out_child; |
563aecb2 | 882 | } else { |
42aa276f | 883 | err = perf_session__write_header(session, rec->evlist, fd, false); |
d5eed904 | 884 | if (err < 0) |
45604710 | 885 | goto out_child; |
56b03f3c ACM |
886 | } |
887 | ||
d3665498 | 888 | if (!rec->no_buildid |
e20960c0 | 889 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
d3665498 | 890 | pr_err("Couldn't generate buildids. " |
e20960c0 | 891 | "Use --no-buildid to profile anyway.\n"); |
8d3eca20 | 892 | err = -1; |
45604710 | 893 | goto out_child; |
e20960c0 RR |
894 | } |
895 | ||
34ba5122 | 896 | machine = &session->machines.host; |
743eb868 | 897 | |
4ea648ae | 898 | err = record__synthesize(rec, false); |
c45c86eb | 899 | if (err < 0) |
45604710 | 900 | goto out_child; |
8d3eca20 | 901 | |
d20deb64 | 902 | if (rec->realtime_prio) { |
de9ac07b PZ |
903 | struct sched_param param; |
904 | ||
d20deb64 | 905 | param.sched_priority = rec->realtime_prio; |
de9ac07b | 906 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
6beba7ad | 907 | pr_err("Could not set realtime priority.\n"); |
8d3eca20 | 908 | err = -1; |
45604710 | 909 | goto out_child; |
de9ac07b PZ |
910 | } |
911 | } | |
912 | ||
774cb499 JO |
913 | /* |
914 | * When perf is starting the traced process, all the events | |
915 | * (apart from group members) have enable_on_exec=1 set, | |
916 | * so don't spoil it by prematurely enabling them. | |
917 | */ | |
6619a53e | 918 | if (!target__none(&opts->target) && !opts->initial_delay) |
3e2be2da | 919 | perf_evlist__enable(rec->evlist); |
764e16a3 | 920 | |
856e9660 PZ |
921 | /* |
922 | * Let the child rip | |
923 | */ | |
e803cf97 | 924 | if (forks) { |
e5bed564 | 925 | union perf_event *event; |
e907caf3 | 926 | pid_t tgid; |
e5bed564 NK |
927 | |
928 | event = malloc(sizeof(event->comm) + machine->id_hdr_size); | |
929 | if (event == NULL) { | |
930 | err = -ENOMEM; | |
931 | goto out_child; | |
932 | } | |
933 | ||
e803cf97 NK |
934 | /* |
935 | * Some H/W events are generated before COMM event | |
936 | * which is emitted during exec(), so perf script | |
937 | * cannot see a correct process name for those events. | |
938 | * Synthesize COMM event to prevent it. | |
939 | */ | |
e907caf3 HB |
940 | tgid = perf_event__synthesize_comm(tool, event, |
941 | rec->evlist->workload.pid, | |
942 | process_synthesized_event, | |
943 | machine); | |
944 | free(event); | |
945 | ||
946 | if (tgid == -1) | |
947 | goto out_child; | |
948 | ||
949 | event = malloc(sizeof(event->namespaces) + | |
950 | (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + | |
951 | machine->id_hdr_size); | |
952 | if (event == NULL) { | |
953 | err = -ENOMEM; | |
954 | goto out_child; | |
955 | } | |
956 | ||
957 | /* | |
958 | * Synthesize NAMESPACES event for the command specified. | |
959 | */ | |
960 | perf_event__synthesize_namespaces(tool, event, | |
961 | rec->evlist->workload.pid, | |
962 | tgid, process_synthesized_event, | |
963 | machine); | |
e5bed564 | 964 | free(event); |
e803cf97 | 965 | |
3e2be2da | 966 | perf_evlist__start_workload(rec->evlist); |
e803cf97 | 967 | } |
856e9660 | 968 | |
6619a53e | 969 | if (opts->initial_delay) { |
0693e680 | 970 | usleep(opts->initial_delay * USEC_PER_MSEC); |
6619a53e AK |
971 | perf_evlist__enable(rec->evlist); |
972 | } | |
973 | ||
5f9cf599 | 974 | trigger_ready(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 975 | trigger_ready(&switch_output_trigger); |
a074865e | 976 | perf_hooks__invoke_record_start(); |
649c48a9 | 977 | for (;;) { |
9f065194 | 978 | unsigned long long hits = rec->samples; |
de9ac07b | 979 | |
05737464 WN |
980 | /* |
981 | * rec->evlist->bkw_mmap_state is possible to be | |
982 | * BKW_MMAP_EMPTY here: when done == true and | |
983 | * hits != rec->samples in previous round. | |
984 | * | |
985 | * perf_evlist__toggle_bkw_mmap ensure we never | |
986 | * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING. | |
987 | */ | |
988 | if (trigger_is_hit(&switch_output_trigger) || done || draining) | |
989 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING); | |
990 | ||
8c6f45a7 | 991 | if (record__mmap_read_all(rec) < 0) { |
5f9cf599 | 992 | trigger_error(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 993 | trigger_error(&switch_output_trigger); |
8d3eca20 | 994 | err = -1; |
45604710 | 995 | goto out_child; |
8d3eca20 | 996 | } |
de9ac07b | 997 | |
2dd6d8a1 AH |
998 | if (auxtrace_record__snapshot_started) { |
999 | auxtrace_record__snapshot_started = 0; | |
5f9cf599 | 1000 | if (!trigger_is_error(&auxtrace_snapshot_trigger)) |
2dd6d8a1 | 1001 | record__read_auxtrace_snapshot(rec); |
5f9cf599 | 1002 | if (trigger_is_error(&auxtrace_snapshot_trigger)) { |
2dd6d8a1 AH |
1003 | pr_err("AUX area tracing snapshot failed\n"); |
1004 | err = -1; | |
1005 | goto out_child; | |
1006 | } | |
1007 | } | |
1008 | ||
3c1cb7e3 | 1009 | if (trigger_is_hit(&switch_output_trigger)) { |
05737464 WN |
1010 | /* |
1011 | * If switch_output_trigger is hit, the data in | |
1012 | * overwritable ring buffer should have been collected, | |
1013 | * so bkw_mmap_state should be set to BKW_MMAP_EMPTY. | |
1014 | * | |
1015 | * If SIGUSR2 raise after or during record__mmap_read_all(), | |
1016 | * record__mmap_read_all() didn't collect data from | |
1017 | * overwritable ring buffer. Read again. | |
1018 | */ | |
1019 | if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING) | |
1020 | continue; | |
3c1cb7e3 WN |
1021 | trigger_ready(&switch_output_trigger); |
1022 | ||
05737464 WN |
1023 | /* |
1024 | * Reenable events in overwrite ring buffer after | |
1025 | * record__mmap_read_all(): we should have collected | |
1026 | * data from it. | |
1027 | */ | |
1028 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING); | |
1029 | ||
3c1cb7e3 WN |
1030 | if (!quiet) |
1031 | fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n", | |
1032 | waking); | |
1033 | waking = 0; | |
1034 | fd = record__switch_output(rec, false); | |
1035 | if (fd < 0) { | |
1036 | pr_err("Failed to switch to new file\n"); | |
1037 | trigger_error(&switch_output_trigger); | |
1038 | err = fd; | |
1039 | goto out_child; | |
1040 | } | |
bfacbe3b JO |
1041 | |
1042 | /* re-arm the alarm */ | |
1043 | if (rec->switch_output.time) | |
1044 | alarm(rec->switch_output.time); | |
3c1cb7e3 WN |
1045 | } |
1046 | ||
d20deb64 | 1047 | if (hits == rec->samples) { |
6dcf45ef | 1048 | if (done || draining) |
649c48a9 | 1049 | break; |
f66a889d | 1050 | err = perf_evlist__poll(rec->evlist, -1); |
a515114f JO |
1051 | /* |
1052 | * Propagate error, only if there's any. Ignore positive | |
1053 | * number of returned events and interrupt error. | |
1054 | */ | |
1055 | if (err > 0 || (err < 0 && errno == EINTR)) | |
45604710 | 1056 | err = 0; |
8b412664 | 1057 | waking++; |
6dcf45ef ACM |
1058 | |
1059 | if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0) | |
1060 | draining = true; | |
8b412664 PZ |
1061 | } |
1062 | ||
774cb499 JO |
1063 | /* |
1064 | * When perf is starting the traced process, at the end events | |
1065 | * die with the process and we wait for that. Thus no need to | |
1066 | * disable events in this case. | |
1067 | */ | |
602ad878 | 1068 | if (done && !disabled && !target__none(&opts->target)) { |
5f9cf599 | 1069 | trigger_off(&auxtrace_snapshot_trigger); |
3e2be2da | 1070 | perf_evlist__disable(rec->evlist); |
2711926a JO |
1071 | disabled = true; |
1072 | } | |
de9ac07b | 1073 | } |
5f9cf599 | 1074 | trigger_off(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1075 | trigger_off(&switch_output_trigger); |
de9ac07b | 1076 | |
f33cbe72 | 1077 | if (forks && workload_exec_errno) { |
35550da3 | 1078 | char msg[STRERR_BUFSIZE]; |
c8b5f2c9 | 1079 | const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); |
f33cbe72 ACM |
1080 | pr_err("Workload failed: %s\n", emsg); |
1081 | err = -1; | |
45604710 | 1082 | goto out_child; |
f33cbe72 ACM |
1083 | } |
1084 | ||
e3d59112 | 1085 | if (!quiet) |
45604710 | 1086 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
b44308f5 | 1087 | |
4ea648ae WN |
1088 | if (target__none(&rec->opts.target)) |
1089 | record__synthesize_workload(rec, true); | |
1090 | ||
45604710 NK |
1091 | out_child: |
1092 | if (forks) { | |
1093 | int exit_status; | |
addc2785 | 1094 | |
45604710 NK |
1095 | if (!child_finished) |
1096 | kill(rec->evlist->workload.pid, SIGTERM); | |
1097 | ||
1098 | wait(&exit_status); | |
1099 | ||
1100 | if (err < 0) | |
1101 | status = err; | |
1102 | else if (WIFEXITED(exit_status)) | |
1103 | status = WEXITSTATUS(exit_status); | |
1104 | else if (WIFSIGNALED(exit_status)) | |
1105 | signr = WTERMSIG(exit_status); | |
1106 | } else | |
1107 | status = err; | |
1108 | ||
4ea648ae | 1109 | record__synthesize(rec, true); |
e3d59112 NK |
1110 | /* this will be recalculated during process_buildids() */ |
1111 | rec->samples = 0; | |
1112 | ||
ecfd7a9c WN |
1113 | if (!err) { |
1114 | if (!rec->timestamp_filename) { | |
1115 | record__finish_output(rec); | |
1116 | } else { | |
1117 | fd = record__switch_output(rec, true); | |
1118 | if (fd < 0) { | |
1119 | status = fd; | |
1120 | goto out_delete_session; | |
1121 | } | |
1122 | } | |
1123 | } | |
39d17dac | 1124 | |
a074865e WN |
1125 | perf_hooks__invoke_record_end(); |
1126 | ||
e3d59112 NK |
1127 | if (!err && !quiet) { |
1128 | char samples[128]; | |
ecfd7a9c WN |
1129 | const char *postfix = rec->timestamp_filename ? |
1130 | ".<timestamp>" : ""; | |
e3d59112 | 1131 | |
ef149c25 | 1132 | if (rec->samples && !rec->opts.full_auxtrace) |
e3d59112 NK |
1133 | scnprintf(samples, sizeof(samples), |
1134 | " (%" PRIu64 " samples)", rec->samples); | |
1135 | else | |
1136 | samples[0] = '\0'; | |
1137 | ||
ecfd7a9c | 1138 | fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n", |
8ceb41d7 | 1139 | perf_data__size(data) / 1024.0 / 1024.0, |
eae8ad80 | 1140 | data->file.path, postfix, samples); |
e3d59112 NK |
1141 | } |
1142 | ||
39d17dac ACM |
1143 | out_delete_session: |
1144 | perf_session__delete(session); | |
45604710 | 1145 | return status; |
de9ac07b | 1146 | } |
0e9b20b8 | 1147 | |
0883e820 | 1148 | static void callchain_debug(struct callchain_param *callchain) |
09b0fd45 | 1149 | { |
aad2b21c | 1150 | static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; |
a601fdff | 1151 | |
0883e820 | 1152 | pr_debug("callchain: type %s\n", str[callchain->record_mode]); |
26d33022 | 1153 | |
0883e820 | 1154 | if (callchain->record_mode == CALLCHAIN_DWARF) |
09b0fd45 | 1155 | pr_debug("callchain: stack dump size %d\n", |
0883e820 | 1156 | callchain->dump_size); |
09b0fd45 JO |
1157 | } |
1158 | ||
0883e820 ACM |
1159 | int record_opts__parse_callchain(struct record_opts *record, |
1160 | struct callchain_param *callchain, | |
1161 | const char *arg, bool unset) | |
09b0fd45 | 1162 | { |
09b0fd45 | 1163 | int ret; |
0883e820 | 1164 | callchain->enabled = !unset; |
eb853e80 | 1165 | |
09b0fd45 JO |
1166 | /* --no-call-graph */ |
1167 | if (unset) { | |
0883e820 | 1168 | callchain->record_mode = CALLCHAIN_NONE; |
09b0fd45 JO |
1169 | pr_debug("callchain: disabled\n"); |
1170 | return 0; | |
1171 | } | |
1172 | ||
0883e820 | 1173 | ret = parse_callchain_record_opt(arg, callchain); |
5c0cf224 JO |
1174 | if (!ret) { |
1175 | /* Enable data address sampling for DWARF unwind. */ | |
0883e820 | 1176 | if (callchain->record_mode == CALLCHAIN_DWARF) |
5c0cf224 | 1177 | record->sample_address = true; |
0883e820 | 1178 | callchain_debug(callchain); |
5c0cf224 | 1179 | } |
26d33022 JO |
1180 | |
1181 | return ret; | |
1182 | } | |
1183 | ||
0883e820 ACM |
1184 | int record_parse_callchain_opt(const struct option *opt, |
1185 | const char *arg, | |
1186 | int unset) | |
1187 | { | |
1188 | return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset); | |
1189 | } | |
1190 | ||
c421e80b | 1191 | int record_callchain_opt(const struct option *opt, |
09b0fd45 JO |
1192 | const char *arg __maybe_unused, |
1193 | int unset __maybe_unused) | |
1194 | { | |
2ddd5c04 | 1195 | struct callchain_param *callchain = opt->value; |
c421e80b | 1196 | |
2ddd5c04 | 1197 | callchain->enabled = true; |
09b0fd45 | 1198 | |
2ddd5c04 ACM |
1199 | if (callchain->record_mode == CALLCHAIN_NONE) |
1200 | callchain->record_mode = CALLCHAIN_FP; | |
eb853e80 | 1201 | |
2ddd5c04 | 1202 | callchain_debug(callchain); |
09b0fd45 JO |
1203 | return 0; |
1204 | } | |
1205 | ||
eb853e80 JO |
1206 | static int perf_record_config(const char *var, const char *value, void *cb) |
1207 | { | |
7a29c087 NK |
1208 | struct record *rec = cb; |
1209 | ||
1210 | if (!strcmp(var, "record.build-id")) { | |
1211 | if (!strcmp(value, "cache")) | |
1212 | rec->no_buildid_cache = false; | |
1213 | else if (!strcmp(value, "no-cache")) | |
1214 | rec->no_buildid_cache = true; | |
1215 | else if (!strcmp(value, "skip")) | |
1216 | rec->no_buildid = true; | |
1217 | else | |
1218 | return -1; | |
1219 | return 0; | |
1220 | } | |
eb853e80 | 1221 | if (!strcmp(var, "record.call-graph")) |
5a2e5e85 | 1222 | var = "call-graph.record-mode"; /* fall-through */ |
eb853e80 JO |
1223 | |
1224 | return perf_default_config(var, value, cb); | |
1225 | } | |
1226 | ||
814c8c38 PZ |
1227 | struct clockid_map { |
1228 | const char *name; | |
1229 | int clockid; | |
1230 | }; | |
1231 | ||
1232 | #define CLOCKID_MAP(n, c) \ | |
1233 | { .name = n, .clockid = (c), } | |
1234 | ||
1235 | #define CLOCKID_END { .name = NULL, } | |
1236 | ||
1237 | ||
1238 | /* | |
1239 | * Add the missing ones, we need to build on many distros... | |
1240 | */ | |
1241 | #ifndef CLOCK_MONOTONIC_RAW | |
1242 | #define CLOCK_MONOTONIC_RAW 4 | |
1243 | #endif | |
1244 | #ifndef CLOCK_BOOTTIME | |
1245 | #define CLOCK_BOOTTIME 7 | |
1246 | #endif | |
1247 | #ifndef CLOCK_TAI | |
1248 | #define CLOCK_TAI 11 | |
1249 | #endif | |
1250 | ||
1251 | static const struct clockid_map clockids[] = { | |
1252 | /* available for all events, NMI safe */ | |
1253 | CLOCKID_MAP("monotonic", CLOCK_MONOTONIC), | |
1254 | CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW), | |
1255 | ||
1256 | /* available for some events */ | |
1257 | CLOCKID_MAP("realtime", CLOCK_REALTIME), | |
1258 | CLOCKID_MAP("boottime", CLOCK_BOOTTIME), | |
1259 | CLOCKID_MAP("tai", CLOCK_TAI), | |
1260 | ||
1261 | /* available for the lazy */ | |
1262 | CLOCKID_MAP("mono", CLOCK_MONOTONIC), | |
1263 | CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW), | |
1264 | CLOCKID_MAP("real", CLOCK_REALTIME), | |
1265 | CLOCKID_MAP("boot", CLOCK_BOOTTIME), | |
1266 | ||
1267 | CLOCKID_END, | |
1268 | }; | |
1269 | ||
1270 | static int parse_clockid(const struct option *opt, const char *str, int unset) | |
1271 | { | |
1272 | struct record_opts *opts = (struct record_opts *)opt->value; | |
1273 | const struct clockid_map *cm; | |
1274 | const char *ostr = str; | |
1275 | ||
1276 | if (unset) { | |
1277 | opts->use_clockid = 0; | |
1278 | return 0; | |
1279 | } | |
1280 | ||
1281 | /* no arg passed */ | |
1282 | if (!str) | |
1283 | return 0; | |
1284 | ||
1285 | /* no setting it twice */ | |
1286 | if (opts->use_clockid) | |
1287 | return -1; | |
1288 | ||
1289 | opts->use_clockid = true; | |
1290 | ||
1291 | /* if its a number, we're done */ | |
1292 | if (sscanf(str, "%d", &opts->clockid) == 1) | |
1293 | return 0; | |
1294 | ||
1295 | /* allow a "CLOCK_" prefix to the name */ | |
1296 | if (!strncasecmp(str, "CLOCK_", 6)) | |
1297 | str += 6; | |
1298 | ||
1299 | for (cm = clockids; cm->name; cm++) { | |
1300 | if (!strcasecmp(str, cm->name)) { | |
1301 | opts->clockid = cm->clockid; | |
1302 | return 0; | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | opts->use_clockid = false; | |
1307 | ui__warning("unknown clockid %s, check man page\n", ostr); | |
1308 | return -1; | |
1309 | } | |
1310 | ||
e9db1310 AH |
1311 | static int record__parse_mmap_pages(const struct option *opt, |
1312 | const char *str, | |
1313 | int unset __maybe_unused) | |
1314 | { | |
1315 | struct record_opts *opts = opt->value; | |
1316 | char *s, *p; | |
1317 | unsigned int mmap_pages; | |
1318 | int ret; | |
1319 | ||
1320 | if (!str) | |
1321 | return -EINVAL; | |
1322 | ||
1323 | s = strdup(str); | |
1324 | if (!s) | |
1325 | return -ENOMEM; | |
1326 | ||
1327 | p = strchr(s, ','); | |
1328 | if (p) | |
1329 | *p = '\0'; | |
1330 | ||
1331 | if (*s) { | |
1332 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s); | |
1333 | if (ret) | |
1334 | goto out_free; | |
1335 | opts->mmap_pages = mmap_pages; | |
1336 | } | |
1337 | ||
1338 | if (!p) { | |
1339 | ret = 0; | |
1340 | goto out_free; | |
1341 | } | |
1342 | ||
1343 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1); | |
1344 | if (ret) | |
1345 | goto out_free; | |
1346 | ||
1347 | opts->auxtrace_mmap_pages = mmap_pages; | |
1348 | ||
1349 | out_free: | |
1350 | free(s); | |
1351 | return ret; | |
1352 | } | |
1353 | ||
0c582449 JO |
1354 | static void switch_output_size_warn(struct record *rec) |
1355 | { | |
1356 | u64 wakeup_size = perf_evlist__mmap_size(rec->opts.mmap_pages); | |
1357 | struct switch_output *s = &rec->switch_output; | |
1358 | ||
1359 | wakeup_size /= 2; | |
1360 | ||
1361 | if (s->size < wakeup_size) { | |
1362 | char buf[100]; | |
1363 | ||
1364 | unit_number__scnprintf(buf, sizeof(buf), wakeup_size); | |
1365 | pr_warning("WARNING: switch-output data size lower than " | |
1366 | "wakeup kernel buffer size (%s) " | |
1367 | "expect bigger perf.data sizes\n", buf); | |
1368 | } | |
1369 | } | |
1370 | ||
cb4e1ebb JO |
1371 | static int switch_output_setup(struct record *rec) |
1372 | { | |
1373 | struct switch_output *s = &rec->switch_output; | |
dc0c6127 JO |
1374 | static struct parse_tag tags_size[] = { |
1375 | { .tag = 'B', .mult = 1 }, | |
1376 | { .tag = 'K', .mult = 1 << 10 }, | |
1377 | { .tag = 'M', .mult = 1 << 20 }, | |
1378 | { .tag = 'G', .mult = 1 << 30 }, | |
1379 | { .tag = 0 }, | |
1380 | }; | |
bfacbe3b JO |
1381 | static struct parse_tag tags_time[] = { |
1382 | { .tag = 's', .mult = 1 }, | |
1383 | { .tag = 'm', .mult = 60 }, | |
1384 | { .tag = 'h', .mult = 60*60 }, | |
1385 | { .tag = 'd', .mult = 60*60*24 }, | |
1386 | { .tag = 0 }, | |
1387 | }; | |
dc0c6127 | 1388 | unsigned long val; |
cb4e1ebb JO |
1389 | |
1390 | if (!s->set) | |
1391 | return 0; | |
1392 | ||
1393 | if (!strcmp(s->str, "signal")) { | |
1394 | s->signal = true; | |
1395 | pr_debug("switch-output with SIGUSR2 signal\n"); | |
dc0c6127 JO |
1396 | goto enabled; |
1397 | } | |
1398 | ||
1399 | val = parse_tag_value(s->str, tags_size); | |
1400 | if (val != (unsigned long) -1) { | |
1401 | s->size = val; | |
1402 | pr_debug("switch-output with %s size threshold\n", s->str); | |
1403 | goto enabled; | |
cb4e1ebb JO |
1404 | } |
1405 | ||
bfacbe3b JO |
1406 | val = parse_tag_value(s->str, tags_time); |
1407 | if (val != (unsigned long) -1) { | |
1408 | s->time = val; | |
1409 | pr_debug("switch-output with %s time threshold (%lu seconds)\n", | |
1410 | s->str, s->time); | |
1411 | goto enabled; | |
1412 | } | |
1413 | ||
cb4e1ebb | 1414 | return -1; |
dc0c6127 JO |
1415 | |
1416 | enabled: | |
1417 | rec->timestamp_filename = true; | |
1418 | s->enabled = true; | |
0c582449 JO |
1419 | |
1420 | if (s->size && !rec->opts.no_buffering) | |
1421 | switch_output_size_warn(rec); | |
1422 | ||
dc0c6127 | 1423 | return 0; |
cb4e1ebb JO |
1424 | } |
1425 | ||
e5b2c207 | 1426 | static const char * const __record_usage[] = { |
9e096753 MG |
1427 | "perf record [<options>] [<command>]", |
1428 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
1429 | NULL |
1430 | }; | |
e5b2c207 | 1431 | const char * const *record_usage = __record_usage; |
0e9b20b8 | 1432 | |
d20deb64 | 1433 | /* |
8c6f45a7 ACM |
1434 | * XXX Ideally would be local to cmd_record() and passed to a record__new |
1435 | * because we need to have access to it in record__exit, that is called | |
d20deb64 ACM |
1436 | * after cmd_record() exits, but since record_options need to be accessible to |
1437 | * builtin-script, leave it here. | |
1438 | * | |
1439 | * At least we don't ouch it in all the other functions here directly. | |
1440 | * | |
1441 | * Just say no to tons of global variables, sigh. | |
1442 | */ | |
8c6f45a7 | 1443 | static struct record record = { |
d20deb64 | 1444 | .opts = { |
8affc2b8 | 1445 | .sample_time = true, |
d20deb64 ACM |
1446 | .mmap_pages = UINT_MAX, |
1447 | .user_freq = UINT_MAX, | |
1448 | .user_interval = ULLONG_MAX, | |
447a6013 | 1449 | .freq = 4000, |
d1cb9fce NK |
1450 | .target = { |
1451 | .uses_mmap = true, | |
3aa5939d | 1452 | .default_per_cpu = true, |
d1cb9fce | 1453 | }, |
9d9cad76 | 1454 | .proc_map_timeout = 500, |
d20deb64 | 1455 | }, |
e3d59112 NK |
1456 | .tool = { |
1457 | .sample = process_sample_event, | |
1458 | .fork = perf_event__process_fork, | |
cca8482c | 1459 | .exit = perf_event__process_exit, |
e3d59112 | 1460 | .comm = perf_event__process_comm, |
f3b3614a | 1461 | .namespaces = perf_event__process_namespaces, |
e3d59112 NK |
1462 | .mmap = perf_event__process_mmap, |
1463 | .mmap2 = perf_event__process_mmap2, | |
cca8482c | 1464 | .ordered_events = true, |
e3d59112 | 1465 | }, |
d20deb64 | 1466 | }; |
7865e817 | 1467 | |
76a26549 NK |
1468 | const char record_callchain_help[] = CALLCHAIN_RECORD_HELP |
1469 | "\n\t\t\t\tDefault: fp"; | |
61eaa3be | 1470 | |
0aab2136 WN |
1471 | static bool dry_run; |
1472 | ||
d20deb64 ACM |
1473 | /* |
1474 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
1475 | * with it and switch to use the library functions in perf_evlist that came | |
b4006796 | 1476 | * from builtin-record.c, i.e. use record_opts, |
d20deb64 ACM |
1477 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', |
1478 | * using pipes, etc. | |
1479 | */ | |
efd21307 | 1480 | static struct option __record_options[] = { |
d20deb64 | 1481 | OPT_CALLBACK('e', "event", &record.evlist, "event", |
86847b62 | 1482 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 1483 | parse_events_option), |
d20deb64 | 1484 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
c171b552 | 1485 | "event filter", parse_filter), |
4ba1faa1 WN |
1486 | OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist, |
1487 | NULL, "don't record events from perf itself", | |
1488 | exclude_perf), | |
bea03405 | 1489 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", |
d6d901c2 | 1490 | "record events on existing process id"), |
bea03405 | 1491 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", |
d6d901c2 | 1492 | "record events on existing thread id"), |
d20deb64 | 1493 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
0e9b20b8 | 1494 | "collect data with this RT SCHED_FIFO priority"), |
509051ea | 1495 | OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering, |
acac03fa | 1496 | "collect data without buffering"), |
d20deb64 | 1497 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
daac07b2 | 1498 | "collect raw sample records from all opened counters"), |
bea03405 | 1499 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, |
0e9b20b8 | 1500 | "system-wide collection from all CPUs"), |
bea03405 | 1501 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", |
c45c6ea2 | 1502 | "list of cpus to monitor"), |
d20deb64 | 1503 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
eae8ad80 | 1504 | OPT_STRING('o', "output", &record.data.file.path, "file", |
abaff32a | 1505 | "output file name"), |
69e7e5b0 AH |
1506 | OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit, |
1507 | &record.opts.no_inherit_set, | |
1508 | "child tasks do not inherit counters"), | |
4ea648ae WN |
1509 | OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize, |
1510 | "synthesize non-sample events at the end of output"), | |
626a6b78 | 1511 | OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"), |
d20deb64 | 1512 | OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"), |
e9db1310 AH |
1513 | OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]", |
1514 | "number of mmap data pages and AUX area tracing mmap pages", | |
1515 | record__parse_mmap_pages), | |
d20deb64 | 1516 | OPT_BOOLEAN(0, "group", &record.opts.group, |
43bece79 | 1517 | "put the counters into a counter group"), |
2ddd5c04 | 1518 | OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, |
09b0fd45 JO |
1519 | NULL, "enables call-graph recording" , |
1520 | &record_callchain_opt), | |
1521 | OPT_CALLBACK(0, "call-graph", &record.opts, | |
76a26549 | 1522 | "record_mode[,record_size]", record_callchain_help, |
09b0fd45 | 1523 | &record_parse_callchain_opt), |
c0555642 | 1524 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 1525 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 1526 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
d20deb64 | 1527 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
649c48a9 | 1528 | "per thread counts"), |
56100321 | 1529 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"), |
3b0a5daa KL |
1530 | OPT_BOOLEAN(0, "phys-data", &record.opts.sample_phys_addr, |
1531 | "Record the sample physical addresses"), | |
b6f35ed7 | 1532 | OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"), |
3abebc55 AH |
1533 | OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time, |
1534 | &record.opts.sample_time_set, | |
1535 | "Record the sample timestamps"), | |
56100321 | 1536 | OPT_BOOLEAN('P', "period", &record.opts.period, "Record the sample period"), |
d20deb64 | 1537 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, |
649c48a9 | 1538 | "don't sample"), |
d2db9a98 WN |
1539 | OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache, |
1540 | &record.no_buildid_cache_set, | |
1541 | "do not update the buildid cache"), | |
1542 | OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid, | |
1543 | &record.no_buildid_set, | |
1544 | "do not collect buildids in perf.data"), | |
d20deb64 | 1545 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
023695d9 SE |
1546 | "monitor event in cgroup name only", |
1547 | parse_cgroups), | |
a6205a35 | 1548 | OPT_UINTEGER('D', "delay", &record.opts.initial_delay, |
6619a53e | 1549 | "ms to wait before starting measurement after program start"), |
bea03405 NK |
1550 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", |
1551 | "user to profile"), | |
a5aabdac SE |
1552 | |
1553 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, | |
1554 | "branch any", "sample any taken branches", | |
1555 | parse_branch_stack), | |
1556 | ||
1557 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, | |
1558 | "branch filter mask", "branch stack filter modes", | |
bdfebd84 | 1559 | parse_branch_stack), |
05484298 AK |
1560 | OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, |
1561 | "sample by weight (on special events only)"), | |
475eeab9 AK |
1562 | OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction, |
1563 | "sample transaction flags (special events only)"), | |
3aa5939d AH |
1564 | OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, |
1565 | "use per-thread mmaps"), | |
bcc84ec6 SE |
1566 | OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register", |
1567 | "sample selected machine registers on interrupt," | |
1568 | " use -I ? to list register names", parse_regs), | |
84c41742 AK |
1569 | OPT_CALLBACK_OPTARG(0, "user-regs", &record.opts.sample_user_regs, NULL, "any register", |
1570 | "sample selected machine registers on interrupt," | |
1571 | " use -I ? to list register names", parse_regs), | |
85c273d2 AK |
1572 | OPT_BOOLEAN(0, "running-time", &record.opts.running_time, |
1573 | "Record running/enabled time of read (:S) events"), | |
814c8c38 PZ |
1574 | OPT_CALLBACK('k', "clockid", &record.opts, |
1575 | "clockid", "clockid to use for events, see clock_gettime()", | |
1576 | parse_clockid), | |
2dd6d8a1 AH |
1577 | OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts, |
1578 | "opts", "AUX area tracing Snapshot Mode", ""), | |
9d9cad76 KL |
1579 | OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout, |
1580 | "per thread proc mmap processing timeout in ms"), | |
f3b3614a HB |
1581 | OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces, |
1582 | "Record namespaces events"), | |
b757bb09 AH |
1583 | OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events, |
1584 | "Record context switch events"), | |
85723885 JO |
1585 | OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel, |
1586 | "Configure all used events to run in kernel space.", | |
1587 | PARSE_OPT_EXCLUSIVE), | |
1588 | OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user, | |
1589 | "Configure all used events to run in user space.", | |
1590 | PARSE_OPT_EXCLUSIVE), | |
71dc2326 WN |
1591 | OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path", |
1592 | "clang binary to use for compiling BPF scriptlets"), | |
1593 | OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options", | |
1594 | "options passed to clang when compiling BPF scriptlets"), | |
7efe0e03 HK |
1595 | OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name, |
1596 | "file", "vmlinux pathname"), | |
6156681b NK |
1597 | OPT_BOOLEAN(0, "buildid-all", &record.buildid_all, |
1598 | "Record build-id of all DSOs regardless of hits"), | |
ecfd7a9c WN |
1599 | OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, |
1600 | "append timestamp to output filename"), | |
cb4e1ebb | 1601 | OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str, |
bfacbe3b JO |
1602 | &record.switch_output.set, "signal,size,time", |
1603 | "Switch output when receive SIGUSR2 or cross size,time threshold", | |
dc0c6127 | 1604 | "signal"), |
0aab2136 WN |
1605 | OPT_BOOLEAN(0, "dry-run", &dry_run, |
1606 | "Parse options then exit"), | |
0e9b20b8 IM |
1607 | OPT_END() |
1608 | }; | |
1609 | ||
e5b2c207 NK |
1610 | struct option *record_options = __record_options; |
1611 | ||
b0ad8ea6 | 1612 | int cmd_record(int argc, const char **argv) |
0e9b20b8 | 1613 | { |
ef149c25 | 1614 | int err; |
8c6f45a7 | 1615 | struct record *rec = &record; |
16ad2ffb | 1616 | char errbuf[BUFSIZ]; |
0e9b20b8 | 1617 | |
48e1cab1 WN |
1618 | #ifndef HAVE_LIBBPF_SUPPORT |
1619 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c) | |
1620 | set_nobuild('\0', "clang-path", true); | |
1621 | set_nobuild('\0', "clang-opt", true); | |
1622 | # undef set_nobuild | |
7efe0e03 HK |
1623 | #endif |
1624 | ||
1625 | #ifndef HAVE_BPF_PROLOGUE | |
1626 | # if !defined (HAVE_DWARF_SUPPORT) | |
1627 | # define REASON "NO_DWARF=1" | |
1628 | # elif !defined (HAVE_LIBBPF_SUPPORT) | |
1629 | # define REASON "NO_LIBBPF=1" | |
1630 | # else | |
1631 | # define REASON "this architecture doesn't support BPF prologue" | |
1632 | # endif | |
1633 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c) | |
1634 | set_nobuild('\0', "vmlinux", true); | |
1635 | # undef set_nobuild | |
1636 | # undef REASON | |
48e1cab1 WN |
1637 | #endif |
1638 | ||
3e2be2da ACM |
1639 | rec->evlist = perf_evlist__new(); |
1640 | if (rec->evlist == NULL) | |
361c99a6 ACM |
1641 | return -ENOMEM; |
1642 | ||
ecc4c561 ACM |
1643 | err = perf_config(perf_record_config, rec); |
1644 | if (err) | |
1645 | return err; | |
eb853e80 | 1646 | |
bca647aa | 1647 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 1648 | PARSE_OPT_STOP_AT_NON_OPTION); |
68ba3235 NK |
1649 | if (quiet) |
1650 | perf_quiet_option(); | |
483635a9 JO |
1651 | |
1652 | /* Make system wide (-a) the default target. */ | |
602ad878 | 1653 | if (!argc && target__none(&rec->opts.target)) |
483635a9 | 1654 | rec->opts.target.system_wide = true; |
0e9b20b8 | 1655 | |
bea03405 | 1656 | if (nr_cgroups && !rec->opts.target.system_wide) { |
c7118369 NK |
1657 | usage_with_options_msg(record_usage, record_options, |
1658 | "cgroup monitoring only available in system-wide mode"); | |
1659 | ||
023695d9 | 1660 | } |
b757bb09 AH |
1661 | if (rec->opts.record_switch_events && |
1662 | !perf_can_record_switch_events()) { | |
c7118369 NK |
1663 | ui__error("kernel does not support recording context switch events\n"); |
1664 | parse_options_usage(record_usage, record_options, "switch-events", 0); | |
1665 | return -EINVAL; | |
b757bb09 | 1666 | } |
023695d9 | 1667 | |
cb4e1ebb JO |
1668 | if (switch_output_setup(rec)) { |
1669 | parse_options_usage(record_usage, record_options, "switch-output", 0); | |
1670 | return -EINVAL; | |
1671 | } | |
1672 | ||
bfacbe3b JO |
1673 | if (rec->switch_output.time) { |
1674 | signal(SIGALRM, alarm_sig_handler); | |
1675 | alarm(rec->switch_output.time); | |
1676 | } | |
1677 | ||
ef149c25 AH |
1678 | if (!rec->itr) { |
1679 | rec->itr = auxtrace_record__init(rec->evlist, &err); | |
1680 | if (err) | |
5c01ad60 | 1681 | goto out; |
ef149c25 AH |
1682 | } |
1683 | ||
2dd6d8a1 AH |
1684 | err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts, |
1685 | rec->opts.auxtrace_snapshot_opts); | |
1686 | if (err) | |
5c01ad60 | 1687 | goto out; |
2dd6d8a1 | 1688 | |
1b36c03e AH |
1689 | /* |
1690 | * Allow aliases to facilitate the lookup of symbols for address | |
1691 | * filters. Refer to auxtrace_parse_filters(). | |
1692 | */ | |
1693 | symbol_conf.allow_aliases = true; | |
1694 | ||
1695 | symbol__init(NULL); | |
1696 | ||
1697 | err = auxtrace_parse_filters(rec->evlist); | |
1698 | if (err) | |
1699 | goto out; | |
1700 | ||
0aab2136 | 1701 | if (dry_run) |
5c01ad60 | 1702 | goto out; |
0aab2136 | 1703 | |
d7888573 WN |
1704 | err = bpf__setup_stdout(rec->evlist); |
1705 | if (err) { | |
1706 | bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf)); | |
1707 | pr_err("ERROR: Setup BPF stdout failed: %s\n", | |
1708 | errbuf); | |
5c01ad60 | 1709 | goto out; |
d7888573 WN |
1710 | } |
1711 | ||
ef149c25 AH |
1712 | err = -ENOMEM; |
1713 | ||
b0ebd811 | 1714 | if (symbol_conf.kptr_restrict && !perf_evlist__exclude_kernel(rec->evlist)) |
646aaea6 ACM |
1715 | pr_warning( |
1716 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
1717 | "check /proc/sys/kernel/kptr_restrict.\n\n" | |
1718 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
1719 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
1720 | "Samples in kernel modules won't be resolved at all.\n\n" | |
1721 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
1722 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
ec80fde7 | 1723 | |
0c1d46a8 | 1724 | if (rec->no_buildid_cache || rec->no_buildid) { |
a1ac1d3c | 1725 | disable_buildid_cache(); |
dc0c6127 | 1726 | } else if (rec->switch_output.enabled) { |
0c1d46a8 WN |
1727 | /* |
1728 | * In 'perf record --switch-output', disable buildid | |
1729 | * generation by default to reduce data file switching | |
1730 | * overhead. Still generate buildid if they are required | |
1731 | * explicitly using | |
1732 | * | |
60437ac0 | 1733 | * perf record --switch-output --no-no-buildid \ |
0c1d46a8 WN |
1734 | * --no-no-buildid-cache |
1735 | * | |
1736 | * Following code equals to: | |
1737 | * | |
1738 | * if ((rec->no_buildid || !rec->no_buildid_set) && | |
1739 | * (rec->no_buildid_cache || !rec->no_buildid_cache_set)) | |
1740 | * disable_buildid_cache(); | |
1741 | */ | |
1742 | bool disable = true; | |
1743 | ||
1744 | if (rec->no_buildid_set && !rec->no_buildid) | |
1745 | disable = false; | |
1746 | if (rec->no_buildid_cache_set && !rec->no_buildid_cache) | |
1747 | disable = false; | |
1748 | if (disable) { | |
1749 | rec->no_buildid = true; | |
1750 | rec->no_buildid_cache = true; | |
1751 | disable_buildid_cache(); | |
1752 | } | |
1753 | } | |
655000e7 | 1754 | |
4ea648ae WN |
1755 | if (record.opts.overwrite) |
1756 | record.opts.tail_synthesize = true; | |
1757 | ||
3e2be2da | 1758 | if (rec->evlist->nr_entries == 0 && |
4b4cd503 | 1759 | __perf_evlist__add_default(rec->evlist, !record.opts.no_samples) < 0) { |
69aad6f1 | 1760 | pr_err("Not enough memory for event selector list\n"); |
394c01ed | 1761 | goto out; |
bbd36e5e | 1762 | } |
0e9b20b8 | 1763 | |
69e7e5b0 AH |
1764 | if (rec->opts.target.tid && !rec->opts.no_inherit_set) |
1765 | rec->opts.no_inherit = true; | |
1766 | ||
602ad878 | 1767 | err = target__validate(&rec->opts.target); |
16ad2ffb | 1768 | if (err) { |
602ad878 | 1769 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
16ad2ffb NK |
1770 | ui__warning("%s", errbuf); |
1771 | } | |
1772 | ||
602ad878 | 1773 | err = target__parse_uid(&rec->opts.target); |
16ad2ffb NK |
1774 | if (err) { |
1775 | int saved_errno = errno; | |
4bd0f2d2 | 1776 | |
602ad878 | 1777 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
3780f488 | 1778 | ui__error("%s", errbuf); |
16ad2ffb NK |
1779 | |
1780 | err = -saved_errno; | |
394c01ed | 1781 | goto out; |
16ad2ffb | 1782 | } |
0d37aa34 | 1783 | |
23dc4f15 JO |
1784 | /* Enable ignoring missing threads when -u option is defined. */ |
1785 | rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX; | |
1786 | ||
16ad2ffb | 1787 | err = -ENOMEM; |
3e2be2da | 1788 | if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0) |
dd7927f4 | 1789 | usage_with_options(record_usage, record_options); |
69aad6f1 | 1790 | |
ef149c25 AH |
1791 | err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts); |
1792 | if (err) | |
394c01ed | 1793 | goto out; |
ef149c25 | 1794 | |
6156681b NK |
1795 | /* |
1796 | * We take all buildids when the file contains | |
1797 | * AUX area tracing data because we do not decode the | |
1798 | * trace because it would take too long. | |
1799 | */ | |
1800 | if (rec->opts.full_auxtrace) | |
1801 | rec->buildid_all = true; | |
1802 | ||
b4006796 | 1803 | if (record_opts__config(&rec->opts)) { |
39d17dac | 1804 | err = -EINVAL; |
394c01ed | 1805 | goto out; |
7e4ff9e3 MG |
1806 | } |
1807 | ||
d20deb64 | 1808 | err = __cmd_record(&record, argc, argv); |
394c01ed | 1809 | out: |
45604710 | 1810 | perf_evlist__delete(rec->evlist); |
d65a458b | 1811 | symbol__exit(); |
ef149c25 | 1812 | auxtrace_record__free(rec->itr); |
39d17dac | 1813 | return err; |
0e9b20b8 | 1814 | } |
2dd6d8a1 AH |
1815 | |
1816 | static void snapshot_sig_handler(int sig __maybe_unused) | |
1817 | { | |
dc0c6127 JO |
1818 | struct record *rec = &record; |
1819 | ||
5f9cf599 WN |
1820 | if (trigger_is_ready(&auxtrace_snapshot_trigger)) { |
1821 | trigger_hit(&auxtrace_snapshot_trigger); | |
1822 | auxtrace_record__snapshot_started = 1; | |
1823 | if (auxtrace_record__snapshot_start(record.itr)) | |
1824 | trigger_error(&auxtrace_snapshot_trigger); | |
1825 | } | |
3c1cb7e3 | 1826 | |
dc0c6127 | 1827 | if (switch_output_signal(rec)) |
3c1cb7e3 | 1828 | trigger_hit(&switch_output_trigger); |
2dd6d8a1 | 1829 | } |
bfacbe3b JO |
1830 | |
1831 | static void alarm_sig_handler(int sig __maybe_unused) | |
1832 | { | |
1833 | struct record *rec = &record; | |
1834 | ||
1835 | if (switch_output_time(rec)) | |
1836 | trigger_hit(&switch_output_trigger); | |
1837 | } |