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Merge tag 'nios2-v4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2
[deliverable/linux.git] / tools / perf / builtin-record.c
1 /*
2 * builtin-record.c
3 *
4 * Builtin record command: Record the profile of a workload
5 * (or a CPU, or a PID) into the perf.data output file - for
6 * later analysis via perf report.
7 */
8 #include "builtin.h"
9
10 #include "perf.h"
11
12 #include "util/build-id.h"
13 #include "util/util.h"
14 #include <subcmd/parse-options.h>
15 #include "util/parse-events.h"
16
17 #include "util/callchain.h"
18 #include "util/cgroup.h"
19 #include "util/header.h"
20 #include "util/event.h"
21 #include "util/evlist.h"
22 #include "util/evsel.h"
23 #include "util/debug.h"
24 #include "util/session.h"
25 #include "util/tool.h"
26 #include "util/symbol.h"
27 #include "util/cpumap.h"
28 #include "util/thread_map.h"
29 #include "util/data.h"
30 #include "util/perf_regs.h"
31 #include "util/auxtrace.h"
32 #include "util/tsc.h"
33 #include "util/parse-branch-options.h"
34 #include "util/parse-regs-options.h"
35 #include "util/llvm-utils.h"
36 #include "util/bpf-loader.h"
37 #include "util/trigger.h"
38 #include "asm/bug.h"
39
40 #include <unistd.h>
41 #include <sched.h>
42 #include <sys/mman.h>
43
44
45 struct record {
46 struct perf_tool tool;
47 struct record_opts opts;
48 u64 bytes_written;
49 struct perf_data_file file;
50 struct auxtrace_record *itr;
51 struct perf_evlist *evlist;
52 struct perf_session *session;
53 const char *progname;
54 int realtime_prio;
55 bool no_buildid;
56 bool no_buildid_set;
57 bool no_buildid_cache;
58 bool no_buildid_cache_set;
59 bool buildid_all;
60 bool timestamp_filename;
61 bool switch_output;
62 unsigned long long samples;
63 };
64
65 static int record__write(struct record *rec, void *bf, size_t size)
66 {
67 if (perf_data_file__write(rec->session->file, bf, size) < 0) {
68 pr_err("failed to write perf data, error: %m\n");
69 return -1;
70 }
71
72 rec->bytes_written += size;
73 return 0;
74 }
75
76 static int process_synthesized_event(struct perf_tool *tool,
77 union perf_event *event,
78 struct perf_sample *sample __maybe_unused,
79 struct machine *machine __maybe_unused)
80 {
81 struct record *rec = container_of(tool, struct record, tool);
82 return record__write(rec, event, event->header.size);
83 }
84
85 static int record__mmap_read(struct record *rec, int idx)
86 {
87 struct perf_mmap *md = &rec->evlist->mmap[idx];
88 u64 head = perf_mmap__read_head(md);
89 u64 old = md->prev;
90 unsigned char *data = md->base + page_size;
91 unsigned long size;
92 void *buf;
93 int rc = 0;
94
95 if (old == head)
96 return 0;
97
98 rec->samples++;
99
100 size = head - old;
101
102 if ((old & md->mask) + size != (head & md->mask)) {
103 buf = &data[old & md->mask];
104 size = md->mask + 1 - (old & md->mask);
105 old += size;
106
107 if (record__write(rec, buf, size) < 0) {
108 rc = -1;
109 goto out;
110 }
111 }
112
113 buf = &data[old & md->mask];
114 size = head - old;
115 old += size;
116
117 if (record__write(rec, buf, size) < 0) {
118 rc = -1;
119 goto out;
120 }
121
122 md->prev = old;
123 perf_evlist__mmap_consume(rec->evlist, idx);
124 out:
125 return rc;
126 }
127
128 static volatile int done;
129 static volatile int signr = -1;
130 static volatile int child_finished;
131
132 static volatile int auxtrace_record__snapshot_started;
133 static DEFINE_TRIGGER(auxtrace_snapshot_trigger);
134 static DEFINE_TRIGGER(switch_output_trigger);
135
136 static void sig_handler(int sig)
137 {
138 if (sig == SIGCHLD)
139 child_finished = 1;
140 else
141 signr = sig;
142
143 done = 1;
144 }
145
146 static void record__sig_exit(void)
147 {
148 if (signr == -1)
149 return;
150
151 signal(signr, SIG_DFL);
152 raise(signr);
153 }
154
155 #ifdef HAVE_AUXTRACE_SUPPORT
156
157 static int record__process_auxtrace(struct perf_tool *tool,
158 union perf_event *event, void *data1,
159 size_t len1, void *data2, size_t len2)
160 {
161 struct record *rec = container_of(tool, struct record, tool);
162 struct perf_data_file *file = &rec->file;
163 size_t padding;
164 u8 pad[8] = {0};
165
166 if (!perf_data_file__is_pipe(file)) {
167 off_t file_offset;
168 int fd = perf_data_file__fd(file);
169 int err;
170
171 file_offset = lseek(fd, 0, SEEK_CUR);
172 if (file_offset == -1)
173 return -1;
174 err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index,
175 event, file_offset);
176 if (err)
177 return err;
178 }
179
180 /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */
181 padding = (len1 + len2) & 7;
182 if (padding)
183 padding = 8 - padding;
184
185 record__write(rec, event, event->header.size);
186 record__write(rec, data1, len1);
187 if (len2)
188 record__write(rec, data2, len2);
189 record__write(rec, &pad, padding);
190
191 return 0;
192 }
193
194 static int record__auxtrace_mmap_read(struct record *rec,
195 struct auxtrace_mmap *mm)
196 {
197 int ret;
198
199 ret = auxtrace_mmap__read(mm, rec->itr, &rec->tool,
200 record__process_auxtrace);
201 if (ret < 0)
202 return ret;
203
204 if (ret)
205 rec->samples++;
206
207 return 0;
208 }
209
210 static int record__auxtrace_mmap_read_snapshot(struct record *rec,
211 struct auxtrace_mmap *mm)
212 {
213 int ret;
214
215 ret = auxtrace_mmap__read_snapshot(mm, rec->itr, &rec->tool,
216 record__process_auxtrace,
217 rec->opts.auxtrace_snapshot_size);
218 if (ret < 0)
219 return ret;
220
221 if (ret)
222 rec->samples++;
223
224 return 0;
225 }
226
227 static int record__auxtrace_read_snapshot_all(struct record *rec)
228 {
229 int i;
230 int rc = 0;
231
232 for (i = 0; i < rec->evlist->nr_mmaps; i++) {
233 struct auxtrace_mmap *mm =
234 &rec->evlist->mmap[i].auxtrace_mmap;
235
236 if (!mm->base)
237 continue;
238
239 if (record__auxtrace_mmap_read_snapshot(rec, mm) != 0) {
240 rc = -1;
241 goto out;
242 }
243 }
244 out:
245 return rc;
246 }
247
248 static void record__read_auxtrace_snapshot(struct record *rec)
249 {
250 pr_debug("Recording AUX area tracing snapshot\n");
251 if (record__auxtrace_read_snapshot_all(rec) < 0) {
252 trigger_error(&auxtrace_snapshot_trigger);
253 } else {
254 if (auxtrace_record__snapshot_finish(rec->itr))
255 trigger_error(&auxtrace_snapshot_trigger);
256 else
257 trigger_ready(&auxtrace_snapshot_trigger);
258 }
259 }
260
261 #else
262
263 static inline
264 int record__auxtrace_mmap_read(struct record *rec __maybe_unused,
265 struct auxtrace_mmap *mm __maybe_unused)
266 {
267 return 0;
268 }
269
270 static inline
271 void record__read_auxtrace_snapshot(struct record *rec __maybe_unused)
272 {
273 }
274
275 static inline
276 int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused)
277 {
278 return 0;
279 }
280
281 #endif
282
283 static int record__open(struct record *rec)
284 {
285 char msg[512];
286 struct perf_evsel *pos;
287 struct perf_evlist *evlist = rec->evlist;
288 struct perf_session *session = rec->session;
289 struct record_opts *opts = &rec->opts;
290 int rc = 0;
291
292 perf_evlist__config(evlist, opts, &callchain_param);
293
294 evlist__for_each(evlist, pos) {
295 try_again:
296 if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) {
297 if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) {
298 if (verbose)
299 ui__warning("%s\n", msg);
300 goto try_again;
301 }
302
303 rc = -errno;
304 perf_evsel__open_strerror(pos, &opts->target,
305 errno, msg, sizeof(msg));
306 ui__error("%s\n", msg);
307 goto out;
308 }
309 }
310
311 if (perf_evlist__apply_filters(evlist, &pos)) {
312 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
313 pos->filter, perf_evsel__name(pos), errno,
314 strerror_r(errno, msg, sizeof(msg)));
315 rc = -1;
316 goto out;
317 }
318
319 if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false,
320 opts->auxtrace_mmap_pages,
321 opts->auxtrace_snapshot_mode) < 0) {
322 if (errno == EPERM) {
323 pr_err("Permission error mapping pages.\n"
324 "Consider increasing "
325 "/proc/sys/kernel/perf_event_mlock_kb,\n"
326 "or try again with a smaller value of -m/--mmap_pages.\n"
327 "(current value: %u,%u)\n",
328 opts->mmap_pages, opts->auxtrace_mmap_pages);
329 rc = -errno;
330 } else {
331 pr_err("failed to mmap with %d (%s)\n", errno,
332 strerror_r(errno, msg, sizeof(msg)));
333 if (errno)
334 rc = -errno;
335 else
336 rc = -EINVAL;
337 }
338 goto out;
339 }
340
341 session->evlist = evlist;
342 perf_session__set_id_hdr_size(session);
343 out:
344 return rc;
345 }
346
347 static int process_sample_event(struct perf_tool *tool,
348 union perf_event *event,
349 struct perf_sample *sample,
350 struct perf_evsel *evsel,
351 struct machine *machine)
352 {
353 struct record *rec = container_of(tool, struct record, tool);
354
355 rec->samples++;
356
357 return build_id__mark_dso_hit(tool, event, sample, evsel, machine);
358 }
359
360 static int process_buildids(struct record *rec)
361 {
362 struct perf_data_file *file = &rec->file;
363 struct perf_session *session = rec->session;
364
365 if (file->size == 0)
366 return 0;
367
368 /*
369 * During this process, it'll load kernel map and replace the
370 * dso->long_name to a real pathname it found. In this case
371 * we prefer the vmlinux path like
372 * /lib/modules/3.16.4/build/vmlinux
373 *
374 * rather than build-id path (in debug directory).
375 * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551
376 */
377 symbol_conf.ignore_vmlinux_buildid = true;
378
379 /*
380 * If --buildid-all is given, it marks all DSO regardless of hits,
381 * so no need to process samples.
382 */
383 if (rec->buildid_all)
384 rec->tool.sample = NULL;
385
386 return perf_session__process_events(session);
387 }
388
389 static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
390 {
391 int err;
392 struct perf_tool *tool = data;
393 /*
394 *As for guest kernel when processing subcommand record&report,
395 *we arrange module mmap prior to guest kernel mmap and trigger
396 *a preload dso because default guest module symbols are loaded
397 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
398 *method is used to avoid symbol missing when the first addr is
399 *in module instead of in guest kernel.
400 */
401 err = perf_event__synthesize_modules(tool, process_synthesized_event,
402 machine);
403 if (err < 0)
404 pr_err("Couldn't record guest kernel [%d]'s reference"
405 " relocation symbol.\n", machine->pid);
406
407 /*
408 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
409 * have no _text sometimes.
410 */
411 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
412 machine);
413 if (err < 0)
414 pr_err("Couldn't record guest kernel [%d]'s reference"
415 " relocation symbol.\n", machine->pid);
416 }
417
418 static struct perf_event_header finished_round_event = {
419 .size = sizeof(struct perf_event_header),
420 .type = PERF_RECORD_FINISHED_ROUND,
421 };
422
423 static int record__mmap_read_all(struct record *rec)
424 {
425 u64 bytes_written = rec->bytes_written;
426 int i;
427 int rc = 0;
428
429 for (i = 0; i < rec->evlist->nr_mmaps; i++) {
430 struct auxtrace_mmap *mm = &rec->evlist->mmap[i].auxtrace_mmap;
431
432 if (rec->evlist->mmap[i].base) {
433 if (record__mmap_read(rec, i) != 0) {
434 rc = -1;
435 goto out;
436 }
437 }
438
439 if (mm->base && !rec->opts.auxtrace_snapshot_mode &&
440 record__auxtrace_mmap_read(rec, mm) != 0) {
441 rc = -1;
442 goto out;
443 }
444 }
445
446 /*
447 * Mark the round finished in case we wrote
448 * at least one event.
449 */
450 if (bytes_written != rec->bytes_written)
451 rc = record__write(rec, &finished_round_event, sizeof(finished_round_event));
452
453 out:
454 return rc;
455 }
456
457 static void record__init_features(struct record *rec)
458 {
459 struct perf_session *session = rec->session;
460 int feat;
461
462 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
463 perf_header__set_feat(&session->header, feat);
464
465 if (rec->no_buildid)
466 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
467
468 if (!have_tracepoints(&rec->evlist->entries))
469 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
470
471 if (!rec->opts.branch_stack)
472 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
473
474 if (!rec->opts.full_auxtrace)
475 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
476
477 perf_header__clear_feat(&session->header, HEADER_STAT);
478 }
479
480 static void
481 record__finish_output(struct record *rec)
482 {
483 struct perf_data_file *file = &rec->file;
484 int fd = perf_data_file__fd(file);
485
486 if (file->is_pipe)
487 return;
488
489 rec->session->header.data_size += rec->bytes_written;
490 file->size = lseek(perf_data_file__fd(file), 0, SEEK_CUR);
491
492 if (!rec->no_buildid) {
493 process_buildids(rec);
494
495 if (rec->buildid_all)
496 dsos__hit_all(rec->session);
497 }
498 perf_session__write_header(rec->session, rec->evlist, fd, true);
499
500 return;
501 }
502
503 static int record__synthesize_workload(struct record *rec)
504 {
505 struct {
506 struct thread_map map;
507 struct thread_map_data map_data;
508 } thread_map;
509
510 thread_map.map.nr = 1;
511 thread_map.map.map[0].pid = rec->evlist->workload.pid;
512 thread_map.map.map[0].comm = NULL;
513 return perf_event__synthesize_thread_map(&rec->tool, &thread_map.map,
514 process_synthesized_event,
515 &rec->session->machines.host,
516 rec->opts.sample_address,
517 rec->opts.proc_map_timeout);
518 }
519
520 static int record__synthesize(struct record *rec);
521
522 static int
523 record__switch_output(struct record *rec, bool at_exit)
524 {
525 struct perf_data_file *file = &rec->file;
526 int fd, err;
527
528 /* Same Size: "2015122520103046"*/
529 char timestamp[] = "InvalidTimestamp";
530
531 rec->samples = 0;
532 record__finish_output(rec);
533 err = fetch_current_timestamp(timestamp, sizeof(timestamp));
534 if (err) {
535 pr_err("Failed to get current timestamp\n");
536 return -EINVAL;
537 }
538
539 fd = perf_data_file__switch(file, timestamp,
540 rec->session->header.data_offset,
541 at_exit);
542 if (fd >= 0 && !at_exit) {
543 rec->bytes_written = 0;
544 rec->session->header.data_size = 0;
545 }
546
547 if (!quiet)
548 fprintf(stderr, "[ perf record: Dump %s.%s ]\n",
549 file->path, timestamp);
550
551 /* Output tracking events */
552 if (!at_exit) {
553 record__synthesize(rec);
554
555 /*
556 * In 'perf record --switch-output' without -a,
557 * record__synthesize() in record__switch_output() won't
558 * generate tracking events because there's no thread_map
559 * in evlist. Which causes newly created perf.data doesn't
560 * contain map and comm information.
561 * Create a fake thread_map and directly call
562 * perf_event__synthesize_thread_map() for those events.
563 */
564 if (target__none(&rec->opts.target))
565 record__synthesize_workload(rec);
566 }
567 return fd;
568 }
569
570 static volatile int workload_exec_errno;
571
572 /*
573 * perf_evlist__prepare_workload will send a SIGUSR1
574 * if the fork fails, since we asked by setting its
575 * want_signal to true.
576 */
577 static void workload_exec_failed_signal(int signo __maybe_unused,
578 siginfo_t *info,
579 void *ucontext __maybe_unused)
580 {
581 workload_exec_errno = info->si_value.sival_int;
582 done = 1;
583 child_finished = 1;
584 }
585
586 static void snapshot_sig_handler(int sig);
587
588 int __weak
589 perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused,
590 struct perf_tool *tool __maybe_unused,
591 perf_event__handler_t process __maybe_unused,
592 struct machine *machine __maybe_unused)
593 {
594 return 0;
595 }
596
597 static int record__synthesize(struct record *rec)
598 {
599 struct perf_session *session = rec->session;
600 struct machine *machine = &session->machines.host;
601 struct perf_data_file *file = &rec->file;
602 struct record_opts *opts = &rec->opts;
603 struct perf_tool *tool = &rec->tool;
604 int fd = perf_data_file__fd(file);
605 int err = 0;
606
607 if (file->is_pipe) {
608 err = perf_event__synthesize_attrs(tool, session,
609 process_synthesized_event);
610 if (err < 0) {
611 pr_err("Couldn't synthesize attrs.\n");
612 goto out;
613 }
614
615 if (have_tracepoints(&rec->evlist->entries)) {
616 /*
617 * FIXME err <= 0 here actually means that
618 * there were no tracepoints so its not really
619 * an error, just that we don't need to
620 * synthesize anything. We really have to
621 * return this more properly and also
622 * propagate errors that now are calling die()
623 */
624 err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist,
625 process_synthesized_event);
626 if (err <= 0) {
627 pr_err("Couldn't record tracing data.\n");
628 goto out;
629 }
630 rec->bytes_written += err;
631 }
632 }
633
634 err = perf_event__synth_time_conv(rec->evlist->mmap[0].base, tool,
635 process_synthesized_event, machine);
636 if (err)
637 goto out;
638
639 if (rec->opts.full_auxtrace) {
640 err = perf_event__synthesize_auxtrace_info(rec->itr, tool,
641 session, process_synthesized_event);
642 if (err)
643 goto out;
644 }
645
646 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
647 machine);
648 WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n"
649 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
650 "Check /proc/kallsyms permission or run as root.\n");
651
652 err = perf_event__synthesize_modules(tool, process_synthesized_event,
653 machine);
654 WARN_ONCE(err < 0, "Couldn't record kernel module information.\n"
655 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
656 "Check /proc/modules permission or run as root.\n");
657
658 if (perf_guest) {
659 machines__process_guests(&session->machines,
660 perf_event__synthesize_guest_os, tool);
661 }
662
663 err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads,
664 process_synthesized_event, opts->sample_address,
665 opts->proc_map_timeout);
666 out:
667 return err;
668 }
669
670 static int __cmd_record(struct record *rec, int argc, const char **argv)
671 {
672 int err;
673 int status = 0;
674 unsigned long waking = 0;
675 const bool forks = argc > 0;
676 struct machine *machine;
677 struct perf_tool *tool = &rec->tool;
678 struct record_opts *opts = &rec->opts;
679 struct perf_data_file *file = &rec->file;
680 struct perf_session *session;
681 bool disabled = false, draining = false;
682 int fd;
683
684 rec->progname = argv[0];
685
686 atexit(record__sig_exit);
687 signal(SIGCHLD, sig_handler);
688 signal(SIGINT, sig_handler);
689 signal(SIGTERM, sig_handler);
690
691 if (rec->opts.auxtrace_snapshot_mode || rec->switch_output) {
692 signal(SIGUSR2, snapshot_sig_handler);
693 if (rec->opts.auxtrace_snapshot_mode)
694 trigger_on(&auxtrace_snapshot_trigger);
695 if (rec->switch_output)
696 trigger_on(&switch_output_trigger);
697 } else {
698 signal(SIGUSR2, SIG_IGN);
699 }
700
701 session = perf_session__new(file, false, tool);
702 if (session == NULL) {
703 pr_err("Perf session creation failed.\n");
704 return -1;
705 }
706
707 fd = perf_data_file__fd(file);
708 rec->session = session;
709
710 record__init_features(rec);
711
712 if (forks) {
713 err = perf_evlist__prepare_workload(rec->evlist, &opts->target,
714 argv, file->is_pipe,
715 workload_exec_failed_signal);
716 if (err < 0) {
717 pr_err("Couldn't run the workload!\n");
718 status = err;
719 goto out_delete_session;
720 }
721 }
722
723 if (record__open(rec) != 0) {
724 err = -1;
725 goto out_child;
726 }
727
728 err = bpf__apply_obj_config();
729 if (err) {
730 char errbuf[BUFSIZ];
731
732 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
733 pr_err("ERROR: Apply config to BPF failed: %s\n",
734 errbuf);
735 goto out_child;
736 }
737
738 /*
739 * Normally perf_session__new would do this, but it doesn't have the
740 * evlist.
741 */
742 if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) {
743 pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n");
744 rec->tool.ordered_events = false;
745 }
746
747 if (!rec->evlist->nr_groups)
748 perf_header__clear_feat(&session->header, HEADER_GROUP_DESC);
749
750 if (file->is_pipe) {
751 err = perf_header__write_pipe(fd);
752 if (err < 0)
753 goto out_child;
754 } else {
755 err = perf_session__write_header(session, rec->evlist, fd, false);
756 if (err < 0)
757 goto out_child;
758 }
759
760 if (!rec->no_buildid
761 && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
762 pr_err("Couldn't generate buildids. "
763 "Use --no-buildid to profile anyway.\n");
764 err = -1;
765 goto out_child;
766 }
767
768 machine = &session->machines.host;
769
770 err = record__synthesize(rec);
771 if (err < 0)
772 goto out_child;
773
774 if (rec->realtime_prio) {
775 struct sched_param param;
776
777 param.sched_priority = rec->realtime_prio;
778 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
779 pr_err("Could not set realtime priority.\n");
780 err = -1;
781 goto out_child;
782 }
783 }
784
785 /*
786 * When perf is starting the traced process, all the events
787 * (apart from group members) have enable_on_exec=1 set,
788 * so don't spoil it by prematurely enabling them.
789 */
790 if (!target__none(&opts->target) && !opts->initial_delay)
791 perf_evlist__enable(rec->evlist);
792
793 /*
794 * Let the child rip
795 */
796 if (forks) {
797 union perf_event *event;
798
799 event = malloc(sizeof(event->comm) + machine->id_hdr_size);
800 if (event == NULL) {
801 err = -ENOMEM;
802 goto out_child;
803 }
804
805 /*
806 * Some H/W events are generated before COMM event
807 * which is emitted during exec(), so perf script
808 * cannot see a correct process name for those events.
809 * Synthesize COMM event to prevent it.
810 */
811 perf_event__synthesize_comm(tool, event,
812 rec->evlist->workload.pid,
813 process_synthesized_event,
814 machine);
815 free(event);
816
817 perf_evlist__start_workload(rec->evlist);
818 }
819
820 if (opts->initial_delay) {
821 usleep(opts->initial_delay * 1000);
822 perf_evlist__enable(rec->evlist);
823 }
824
825 trigger_ready(&auxtrace_snapshot_trigger);
826 trigger_ready(&switch_output_trigger);
827 for (;;) {
828 unsigned long long hits = rec->samples;
829
830 if (record__mmap_read_all(rec) < 0) {
831 trigger_error(&auxtrace_snapshot_trigger);
832 trigger_error(&switch_output_trigger);
833 err = -1;
834 goto out_child;
835 }
836
837 if (auxtrace_record__snapshot_started) {
838 auxtrace_record__snapshot_started = 0;
839 if (!trigger_is_error(&auxtrace_snapshot_trigger))
840 record__read_auxtrace_snapshot(rec);
841 if (trigger_is_error(&auxtrace_snapshot_trigger)) {
842 pr_err("AUX area tracing snapshot failed\n");
843 err = -1;
844 goto out_child;
845 }
846 }
847
848 if (trigger_is_hit(&switch_output_trigger)) {
849 trigger_ready(&switch_output_trigger);
850
851 if (!quiet)
852 fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n",
853 waking);
854 waking = 0;
855 fd = record__switch_output(rec, false);
856 if (fd < 0) {
857 pr_err("Failed to switch to new file\n");
858 trigger_error(&switch_output_trigger);
859 err = fd;
860 goto out_child;
861 }
862 }
863
864 if (hits == rec->samples) {
865 if (done || draining)
866 break;
867 err = perf_evlist__poll(rec->evlist, -1);
868 /*
869 * Propagate error, only if there's any. Ignore positive
870 * number of returned events and interrupt error.
871 */
872 if (err > 0 || (err < 0 && errno == EINTR))
873 err = 0;
874 waking++;
875
876 if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0)
877 draining = true;
878 }
879
880 /*
881 * When perf is starting the traced process, at the end events
882 * die with the process and we wait for that. Thus no need to
883 * disable events in this case.
884 */
885 if (done && !disabled && !target__none(&opts->target)) {
886 trigger_off(&auxtrace_snapshot_trigger);
887 perf_evlist__disable(rec->evlist);
888 disabled = true;
889 }
890 }
891 trigger_off(&auxtrace_snapshot_trigger);
892 trigger_off(&switch_output_trigger);
893
894 if (forks && workload_exec_errno) {
895 char msg[STRERR_BUFSIZE];
896 const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
897 pr_err("Workload failed: %s\n", emsg);
898 err = -1;
899 goto out_child;
900 }
901
902 if (!quiet)
903 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
904
905 out_child:
906 if (forks) {
907 int exit_status;
908
909 if (!child_finished)
910 kill(rec->evlist->workload.pid, SIGTERM);
911
912 wait(&exit_status);
913
914 if (err < 0)
915 status = err;
916 else if (WIFEXITED(exit_status))
917 status = WEXITSTATUS(exit_status);
918 else if (WIFSIGNALED(exit_status))
919 signr = WTERMSIG(exit_status);
920 } else
921 status = err;
922
923 /* this will be recalculated during process_buildids() */
924 rec->samples = 0;
925
926 if (!err) {
927 if (!rec->timestamp_filename) {
928 record__finish_output(rec);
929 } else {
930 fd = record__switch_output(rec, true);
931 if (fd < 0) {
932 status = fd;
933 goto out_delete_session;
934 }
935 }
936 }
937
938 if (!err && !quiet) {
939 char samples[128];
940 const char *postfix = rec->timestamp_filename ?
941 ".<timestamp>" : "";
942
943 if (rec->samples && !rec->opts.full_auxtrace)
944 scnprintf(samples, sizeof(samples),
945 " (%" PRIu64 " samples)", rec->samples);
946 else
947 samples[0] = '\0';
948
949 fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n",
950 perf_data_file__size(file) / 1024.0 / 1024.0,
951 file->path, postfix, samples);
952 }
953
954 out_delete_session:
955 perf_session__delete(session);
956 return status;
957 }
958
959 static void callchain_debug(struct callchain_param *callchain)
960 {
961 static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" };
962
963 pr_debug("callchain: type %s\n", str[callchain->record_mode]);
964
965 if (callchain->record_mode == CALLCHAIN_DWARF)
966 pr_debug("callchain: stack dump size %d\n",
967 callchain->dump_size);
968 }
969
970 int record_opts__parse_callchain(struct record_opts *record,
971 struct callchain_param *callchain,
972 const char *arg, bool unset)
973 {
974 int ret;
975 callchain->enabled = !unset;
976
977 /* --no-call-graph */
978 if (unset) {
979 callchain->record_mode = CALLCHAIN_NONE;
980 pr_debug("callchain: disabled\n");
981 return 0;
982 }
983
984 ret = parse_callchain_record_opt(arg, callchain);
985 if (!ret) {
986 /* Enable data address sampling for DWARF unwind. */
987 if (callchain->record_mode == CALLCHAIN_DWARF)
988 record->sample_address = true;
989 callchain_debug(callchain);
990 }
991
992 return ret;
993 }
994
995 int record_parse_callchain_opt(const struct option *opt,
996 const char *arg,
997 int unset)
998 {
999 return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset);
1000 }
1001
1002 int record_callchain_opt(const struct option *opt,
1003 const char *arg __maybe_unused,
1004 int unset __maybe_unused)
1005 {
1006 struct callchain_param *callchain = opt->value;
1007
1008 callchain->enabled = true;
1009
1010 if (callchain->record_mode == CALLCHAIN_NONE)
1011 callchain->record_mode = CALLCHAIN_FP;
1012
1013 callchain_debug(callchain);
1014 return 0;
1015 }
1016
1017 static int perf_record_config(const char *var, const char *value, void *cb)
1018 {
1019 struct record *rec = cb;
1020
1021 if (!strcmp(var, "record.build-id")) {
1022 if (!strcmp(value, "cache"))
1023 rec->no_buildid_cache = false;
1024 else if (!strcmp(value, "no-cache"))
1025 rec->no_buildid_cache = true;
1026 else if (!strcmp(value, "skip"))
1027 rec->no_buildid = true;
1028 else
1029 return -1;
1030 return 0;
1031 }
1032 if (!strcmp(var, "record.call-graph"))
1033 var = "call-graph.record-mode"; /* fall-through */
1034
1035 return perf_default_config(var, value, cb);
1036 }
1037
1038 struct clockid_map {
1039 const char *name;
1040 int clockid;
1041 };
1042
1043 #define CLOCKID_MAP(n, c) \
1044 { .name = n, .clockid = (c), }
1045
1046 #define CLOCKID_END { .name = NULL, }
1047
1048
1049 /*
1050 * Add the missing ones, we need to build on many distros...
1051 */
1052 #ifndef CLOCK_MONOTONIC_RAW
1053 #define CLOCK_MONOTONIC_RAW 4
1054 #endif
1055 #ifndef CLOCK_BOOTTIME
1056 #define CLOCK_BOOTTIME 7
1057 #endif
1058 #ifndef CLOCK_TAI
1059 #define CLOCK_TAI 11
1060 #endif
1061
1062 static const struct clockid_map clockids[] = {
1063 /* available for all events, NMI safe */
1064 CLOCKID_MAP("monotonic", CLOCK_MONOTONIC),
1065 CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW),
1066
1067 /* available for some events */
1068 CLOCKID_MAP("realtime", CLOCK_REALTIME),
1069 CLOCKID_MAP("boottime", CLOCK_BOOTTIME),
1070 CLOCKID_MAP("tai", CLOCK_TAI),
1071
1072 /* available for the lazy */
1073 CLOCKID_MAP("mono", CLOCK_MONOTONIC),
1074 CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW),
1075 CLOCKID_MAP("real", CLOCK_REALTIME),
1076 CLOCKID_MAP("boot", CLOCK_BOOTTIME),
1077
1078 CLOCKID_END,
1079 };
1080
1081 static int parse_clockid(const struct option *opt, const char *str, int unset)
1082 {
1083 struct record_opts *opts = (struct record_opts *)opt->value;
1084 const struct clockid_map *cm;
1085 const char *ostr = str;
1086
1087 if (unset) {
1088 opts->use_clockid = 0;
1089 return 0;
1090 }
1091
1092 /* no arg passed */
1093 if (!str)
1094 return 0;
1095
1096 /* no setting it twice */
1097 if (opts->use_clockid)
1098 return -1;
1099
1100 opts->use_clockid = true;
1101
1102 /* if its a number, we're done */
1103 if (sscanf(str, "%d", &opts->clockid) == 1)
1104 return 0;
1105
1106 /* allow a "CLOCK_" prefix to the name */
1107 if (!strncasecmp(str, "CLOCK_", 6))
1108 str += 6;
1109
1110 for (cm = clockids; cm->name; cm++) {
1111 if (!strcasecmp(str, cm->name)) {
1112 opts->clockid = cm->clockid;
1113 return 0;
1114 }
1115 }
1116
1117 opts->use_clockid = false;
1118 ui__warning("unknown clockid %s, check man page\n", ostr);
1119 return -1;
1120 }
1121
1122 static int record__parse_mmap_pages(const struct option *opt,
1123 const char *str,
1124 int unset __maybe_unused)
1125 {
1126 struct record_opts *opts = opt->value;
1127 char *s, *p;
1128 unsigned int mmap_pages;
1129 int ret;
1130
1131 if (!str)
1132 return -EINVAL;
1133
1134 s = strdup(str);
1135 if (!s)
1136 return -ENOMEM;
1137
1138 p = strchr(s, ',');
1139 if (p)
1140 *p = '\0';
1141
1142 if (*s) {
1143 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s);
1144 if (ret)
1145 goto out_free;
1146 opts->mmap_pages = mmap_pages;
1147 }
1148
1149 if (!p) {
1150 ret = 0;
1151 goto out_free;
1152 }
1153
1154 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1);
1155 if (ret)
1156 goto out_free;
1157
1158 opts->auxtrace_mmap_pages = mmap_pages;
1159
1160 out_free:
1161 free(s);
1162 return ret;
1163 }
1164
1165 static const char * const __record_usage[] = {
1166 "perf record [<options>] [<command>]",
1167 "perf record [<options>] -- <command> [<options>]",
1168 NULL
1169 };
1170 const char * const *record_usage = __record_usage;
1171
1172 /*
1173 * XXX Ideally would be local to cmd_record() and passed to a record__new
1174 * because we need to have access to it in record__exit, that is called
1175 * after cmd_record() exits, but since record_options need to be accessible to
1176 * builtin-script, leave it here.
1177 *
1178 * At least we don't ouch it in all the other functions here directly.
1179 *
1180 * Just say no to tons of global variables, sigh.
1181 */
1182 static struct record record = {
1183 .opts = {
1184 .sample_time = true,
1185 .mmap_pages = UINT_MAX,
1186 .user_freq = UINT_MAX,
1187 .user_interval = ULLONG_MAX,
1188 .freq = 4000,
1189 .target = {
1190 .uses_mmap = true,
1191 .default_per_cpu = true,
1192 },
1193 .proc_map_timeout = 500,
1194 },
1195 .tool = {
1196 .sample = process_sample_event,
1197 .fork = perf_event__process_fork,
1198 .exit = perf_event__process_exit,
1199 .comm = perf_event__process_comm,
1200 .mmap = perf_event__process_mmap,
1201 .mmap2 = perf_event__process_mmap2,
1202 .ordered_events = true,
1203 },
1204 };
1205
1206 const char record_callchain_help[] = CALLCHAIN_RECORD_HELP
1207 "\n\t\t\t\tDefault: fp";
1208
1209 /*
1210 * XXX Will stay a global variable till we fix builtin-script.c to stop messing
1211 * with it and switch to use the library functions in perf_evlist that came
1212 * from builtin-record.c, i.e. use record_opts,
1213 * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
1214 * using pipes, etc.
1215 */
1216 struct option __record_options[] = {
1217 OPT_CALLBACK('e', "event", &record.evlist, "event",
1218 "event selector. use 'perf list' to list available events",
1219 parse_events_option),
1220 OPT_CALLBACK(0, "filter", &record.evlist, "filter",
1221 "event filter", parse_filter),
1222 OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist,
1223 NULL, "don't record events from perf itself",
1224 exclude_perf),
1225 OPT_STRING('p', "pid", &record.opts.target.pid, "pid",
1226 "record events on existing process id"),
1227 OPT_STRING('t', "tid", &record.opts.target.tid, "tid",
1228 "record events on existing thread id"),
1229 OPT_INTEGER('r', "realtime", &record.realtime_prio,
1230 "collect data with this RT SCHED_FIFO priority"),
1231 OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering,
1232 "collect data without buffering"),
1233 OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples,
1234 "collect raw sample records from all opened counters"),
1235 OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide,
1236 "system-wide collection from all CPUs"),
1237 OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
1238 "list of cpus to monitor"),
1239 OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
1240 OPT_STRING('o', "output", &record.file.path, "file",
1241 "output file name"),
1242 OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
1243 &record.opts.no_inherit_set,
1244 "child tasks do not inherit counters"),
1245 OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"),
1246 OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]",
1247 "number of mmap data pages and AUX area tracing mmap pages",
1248 record__parse_mmap_pages),
1249 OPT_BOOLEAN(0, "group", &record.opts.group,
1250 "put the counters into a counter group"),
1251 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1252 NULL, "enables call-graph recording" ,
1253 &record_callchain_opt),
1254 OPT_CALLBACK(0, "call-graph", &record.opts,
1255 "record_mode[,record_size]", record_callchain_help,
1256 &record_parse_callchain_opt),
1257 OPT_INCR('v', "verbose", &verbose,
1258 "be more verbose (show counter open errors, etc)"),
1259 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
1260 OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
1261 "per thread counts"),
1262 OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"),
1263 OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
1264 &record.opts.sample_time_set,
1265 "Record the sample timestamps"),
1266 OPT_BOOLEAN('P', "period", &record.opts.period, "Record the sample period"),
1267 OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
1268 "don't sample"),
1269 OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache,
1270 &record.no_buildid_cache_set,
1271 "do not update the buildid cache"),
1272 OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid,
1273 &record.no_buildid_set,
1274 "do not collect buildids in perf.data"),
1275 OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
1276 "monitor event in cgroup name only",
1277 parse_cgroups),
1278 OPT_UINTEGER('D', "delay", &record.opts.initial_delay,
1279 "ms to wait before starting measurement after program start"),
1280 OPT_STRING('u', "uid", &record.opts.target.uid_str, "user",
1281 "user to profile"),
1282
1283 OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack,
1284 "branch any", "sample any taken branches",
1285 parse_branch_stack),
1286
1287 OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
1288 "branch filter mask", "branch stack filter modes",
1289 parse_branch_stack),
1290 OPT_BOOLEAN('W', "weight", &record.opts.sample_weight,
1291 "sample by weight (on special events only)"),
1292 OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction,
1293 "sample transaction flags (special events only)"),
1294 OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread,
1295 "use per-thread mmaps"),
1296 OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register",
1297 "sample selected machine registers on interrupt,"
1298 " use -I ? to list register names", parse_regs),
1299 OPT_BOOLEAN(0, "running-time", &record.opts.running_time,
1300 "Record running/enabled time of read (:S) events"),
1301 OPT_CALLBACK('k', "clockid", &record.opts,
1302 "clockid", "clockid to use for events, see clock_gettime()",
1303 parse_clockid),
1304 OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts,
1305 "opts", "AUX area tracing Snapshot Mode", ""),
1306 OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout,
1307 "per thread proc mmap processing timeout in ms"),
1308 OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events,
1309 "Record context switch events"),
1310 OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel,
1311 "Configure all used events to run in kernel space.",
1312 PARSE_OPT_EXCLUSIVE),
1313 OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user,
1314 "Configure all used events to run in user space.",
1315 PARSE_OPT_EXCLUSIVE),
1316 OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path",
1317 "clang binary to use for compiling BPF scriptlets"),
1318 OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options",
1319 "options passed to clang when compiling BPF scriptlets"),
1320 OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name,
1321 "file", "vmlinux pathname"),
1322 OPT_BOOLEAN(0, "buildid-all", &record.buildid_all,
1323 "Record build-id of all DSOs regardless of hits"),
1324 OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename,
1325 "append timestamp to output filename"),
1326 OPT_BOOLEAN(0, "switch-output", &record.switch_output,
1327 "Switch output when receive SIGUSR2"),
1328 OPT_END()
1329 };
1330
1331 struct option *record_options = __record_options;
1332
1333 int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
1334 {
1335 int err;
1336 struct record *rec = &record;
1337 char errbuf[BUFSIZ];
1338
1339 #ifndef HAVE_LIBBPF_SUPPORT
1340 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c)
1341 set_nobuild('\0', "clang-path", true);
1342 set_nobuild('\0', "clang-opt", true);
1343 # undef set_nobuild
1344 #endif
1345
1346 #ifndef HAVE_BPF_PROLOGUE
1347 # if !defined (HAVE_DWARF_SUPPORT)
1348 # define REASON "NO_DWARF=1"
1349 # elif !defined (HAVE_LIBBPF_SUPPORT)
1350 # define REASON "NO_LIBBPF=1"
1351 # else
1352 # define REASON "this architecture doesn't support BPF prologue"
1353 # endif
1354 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c)
1355 set_nobuild('\0', "vmlinux", true);
1356 # undef set_nobuild
1357 # undef REASON
1358 #endif
1359
1360 rec->evlist = perf_evlist__new();
1361 if (rec->evlist == NULL)
1362 return -ENOMEM;
1363
1364 perf_config(perf_record_config, rec);
1365
1366 argc = parse_options(argc, argv, record_options, record_usage,
1367 PARSE_OPT_STOP_AT_NON_OPTION);
1368 if (!argc && target__none(&rec->opts.target))
1369 usage_with_options(record_usage, record_options);
1370
1371 if (nr_cgroups && !rec->opts.target.system_wide) {
1372 usage_with_options_msg(record_usage, record_options,
1373 "cgroup monitoring only available in system-wide mode");
1374
1375 }
1376 if (rec->opts.record_switch_events &&
1377 !perf_can_record_switch_events()) {
1378 ui__error("kernel does not support recording context switch events\n");
1379 parse_options_usage(record_usage, record_options, "switch-events", 0);
1380 return -EINVAL;
1381 }
1382
1383 if (rec->switch_output)
1384 rec->timestamp_filename = true;
1385
1386 if (!rec->itr) {
1387 rec->itr = auxtrace_record__init(rec->evlist, &err);
1388 if (err)
1389 return err;
1390 }
1391
1392 err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts,
1393 rec->opts.auxtrace_snapshot_opts);
1394 if (err)
1395 return err;
1396
1397 err = bpf__setup_stdout(rec->evlist);
1398 if (err) {
1399 bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf));
1400 pr_err("ERROR: Setup BPF stdout failed: %s\n",
1401 errbuf);
1402 return err;
1403 }
1404
1405 err = -ENOMEM;
1406
1407 symbol__init(NULL);
1408
1409 if (symbol_conf.kptr_restrict)
1410 pr_warning(
1411 "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
1412 "check /proc/sys/kernel/kptr_restrict.\n\n"
1413 "Samples in kernel functions may not be resolved if a suitable vmlinux\n"
1414 "file is not found in the buildid cache or in the vmlinux path.\n\n"
1415 "Samples in kernel modules won't be resolved at all.\n\n"
1416 "If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
1417 "even with a suitable vmlinux or kallsyms file.\n\n");
1418
1419 if (rec->no_buildid_cache || rec->no_buildid) {
1420 disable_buildid_cache();
1421 } else if (rec->switch_output) {
1422 /*
1423 * In 'perf record --switch-output', disable buildid
1424 * generation by default to reduce data file switching
1425 * overhead. Still generate buildid if they are required
1426 * explicitly using
1427 *
1428 * perf record --signal-trigger --no-no-buildid \
1429 * --no-no-buildid-cache
1430 *
1431 * Following code equals to:
1432 *
1433 * if ((rec->no_buildid || !rec->no_buildid_set) &&
1434 * (rec->no_buildid_cache || !rec->no_buildid_cache_set))
1435 * disable_buildid_cache();
1436 */
1437 bool disable = true;
1438
1439 if (rec->no_buildid_set && !rec->no_buildid)
1440 disable = false;
1441 if (rec->no_buildid_cache_set && !rec->no_buildid_cache)
1442 disable = false;
1443 if (disable) {
1444 rec->no_buildid = true;
1445 rec->no_buildid_cache = true;
1446 disable_buildid_cache();
1447 }
1448 }
1449
1450 if (rec->evlist->nr_entries == 0 &&
1451 perf_evlist__add_default(rec->evlist) < 0) {
1452 pr_err("Not enough memory for event selector list\n");
1453 goto out_symbol_exit;
1454 }
1455
1456 if (rec->opts.target.tid && !rec->opts.no_inherit_set)
1457 rec->opts.no_inherit = true;
1458
1459 err = target__validate(&rec->opts.target);
1460 if (err) {
1461 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1462 ui__warning("%s", errbuf);
1463 }
1464
1465 err = target__parse_uid(&rec->opts.target);
1466 if (err) {
1467 int saved_errno = errno;
1468
1469 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1470 ui__error("%s", errbuf);
1471
1472 err = -saved_errno;
1473 goto out_symbol_exit;
1474 }
1475
1476 err = -ENOMEM;
1477 if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0)
1478 usage_with_options(record_usage, record_options);
1479
1480 err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts);
1481 if (err)
1482 goto out_symbol_exit;
1483
1484 /*
1485 * We take all buildids when the file contains
1486 * AUX area tracing data because we do not decode the
1487 * trace because it would take too long.
1488 */
1489 if (rec->opts.full_auxtrace)
1490 rec->buildid_all = true;
1491
1492 if (record_opts__config(&rec->opts)) {
1493 err = -EINVAL;
1494 goto out_symbol_exit;
1495 }
1496
1497 err = __cmd_record(&record, argc, argv);
1498 out_symbol_exit:
1499 perf_evlist__delete(rec->evlist);
1500 symbol__exit();
1501 auxtrace_record__free(rec->itr);
1502 return err;
1503 }
1504
1505 static void snapshot_sig_handler(int sig __maybe_unused)
1506 {
1507 if (trigger_is_ready(&auxtrace_snapshot_trigger)) {
1508 trigger_hit(&auxtrace_snapshot_trigger);
1509 auxtrace_record__snapshot_started = 1;
1510 if (auxtrace_record__snapshot_start(record.itr))
1511 trigger_error(&auxtrace_snapshot_trigger);
1512 }
1513
1514 if (trigger_is_ready(&switch_output_trigger))
1515 trigger_hit(&switch_output_trigger);
1516 }
Linux kernel - Deliverables
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