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.
12 #include "util/build-id.h"
13 #include "util/util.h"
14 #include <subcmd/parse-options.h>
15 #include "util/parse-events.h"
16 #include "util/config.h"
18 #include "util/callchain.h"
19 #include "util/cgroup.h"
20 #include "util/header.h"
21 #include "util/event.h"
22 #include "util/evlist.h"
23 #include "util/evsel.h"
24 #include "util/debug.h"
25 #include "util/drv_configs.h"
26 #include "util/session.h"
27 #include "util/tool.h"
28 #include "util/symbol.h"
29 #include "util/cpumap.h"
30 #include "util/thread_map.h"
31 #include "util/data.h"
32 #include "util/perf_regs.h"
33 #include "util/auxtrace.h"
35 #include "util/parse-branch-options.h"
36 #include "util/parse-regs-options.h"
37 #include "util/llvm-utils.h"
38 #include "util/bpf-loader.h"
39 #include "util/trigger.h"
40 #include "util/perf-hooks.h"
47 #include <linux/time64.h>
49 struct switch_output {
59 struct perf_tool tool;
60 struct record_opts opts;
62 struct perf_data_file file;
63 struct auxtrace_record *itr;
64 struct perf_evlist *evlist;
65 struct perf_session *session;
70 bool no_buildid_cache;
71 bool no_buildid_cache_set;
73 bool timestamp_filename;
74 struct switch_output switch_output;
75 unsigned long long samples;
78 static volatile int auxtrace_record__snapshot_started;
79 static DEFINE_TRIGGER(auxtrace_snapshot_trigger);
80 static DEFINE_TRIGGER(switch_output_trigger);
82 static bool switch_output_signal(struct record *rec)
84 return rec->switch_output.signal &&
85 trigger_is_ready(&switch_output_trigger);
88 static bool switch_output_size(struct record *rec)
90 return rec->switch_output.size &&
91 trigger_is_ready(&switch_output_trigger) &&
92 (rec->bytes_written >= rec->switch_output.size);
95 static bool switch_output_time(struct record *rec)
97 return rec->switch_output.time &&
98 trigger_is_ready(&switch_output_trigger);
101 static int record__write(struct record *rec, void *bf, size_t size)
103 if (perf_data_file__write(rec->session->file, bf, size) < 0) {
104 pr_err("failed to write perf data, error: %m\n");
108 rec->bytes_written += size;
110 if (switch_output_size(rec))
111 trigger_hit(&switch_output_trigger);
116 static int process_synthesized_event(struct perf_tool *tool,
117 union perf_event *event,
118 struct perf_sample *sample __maybe_unused,
119 struct machine *machine __maybe_unused)
121 struct record *rec = container_of(tool, struct record, tool);
122 return record__write(rec, event, event->header.size);
126 backward_rb_find_range(void *buf, int mask, u64 head, u64 *start, u64 *end)
128 struct perf_event_header *pheader;
132 pr_debug2("backward_rb_find_range: buf=%p, head=%"PRIx64"\n", buf, head);
133 pheader = (struct perf_event_header *)(buf + (head & mask));
136 if (evt_head - head >= (unsigned int)size) {
137 pr_debug("Finished reading backward ring buffer: rewind\n");
138 if (evt_head - head > (unsigned int)size)
139 evt_head -= pheader->size;
144 pheader = (struct perf_event_header *)(buf + (evt_head & mask));
146 if (pheader->size == 0) {
147 pr_debug("Finished reading backward ring buffer: get start\n");
152 evt_head += pheader->size;
153 pr_debug3("move evt_head: %"PRIx64"\n", evt_head);
155 WARN_ONCE(1, "Shouldn't get here\n");
160 rb_find_range(void *data, int mask, u64 head, u64 old,
161 u64 *start, u64 *end, bool backward)
169 return backward_rb_find_range(data, mask, head, start, end);
173 record__mmap_read(struct record *rec, struct perf_mmap *md,
174 bool overwrite, bool backward)
176 u64 head = perf_mmap__read_head(md);
178 u64 end = head, start = old;
179 unsigned char *data = md->base + page_size;
184 if (rb_find_range(data, md->mask, head,
185 old, &start, &end, backward))
194 if (size > (unsigned long)(md->mask) + 1) {
195 WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
198 perf_mmap__consume(md, overwrite || backward);
202 if ((start & md->mask) + size != (end & md->mask)) {
203 buf = &data[start & md->mask];
204 size = md->mask + 1 - (start & md->mask);
207 if (record__write(rec, buf, size) < 0) {
213 buf = &data[start & md->mask];
217 if (record__write(rec, buf, size) < 0) {
223 perf_mmap__consume(md, overwrite || backward);
228 static volatile int done;
229 static volatile int signr = -1;
230 static volatile int child_finished;
232 static void sig_handler(int sig)
242 static void sigsegv_handler(int sig)
244 perf_hooks__recover();
245 sighandler_dump_stack(sig);
248 static void record__sig_exit(void)
253 signal(signr, SIG_DFL);
257 #ifdef HAVE_AUXTRACE_SUPPORT
259 static int record__process_auxtrace(struct perf_tool *tool,
260 union perf_event *event, void *data1,
261 size_t len1, void *data2, size_t len2)
263 struct record *rec = container_of(tool, struct record, tool);
264 struct perf_data_file *file = &rec->file;
268 if (!perf_data_file__is_pipe(file)) {
270 int fd = perf_data_file__fd(file);
273 file_offset = lseek(fd, 0, SEEK_CUR);
274 if (file_offset == -1)
276 err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index,
282 /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */
283 padding = (len1 + len2) & 7;
285 padding = 8 - padding;
287 record__write(rec, event, event->header.size);
288 record__write(rec, data1, len1);
290 record__write(rec, data2, len2);
291 record__write(rec, &pad, padding);
296 static int record__auxtrace_mmap_read(struct record *rec,
297 struct auxtrace_mmap *mm)
301 ret = auxtrace_mmap__read(mm, rec->itr, &rec->tool,
302 record__process_auxtrace);
312 static int record__auxtrace_mmap_read_snapshot(struct record *rec,
313 struct auxtrace_mmap *mm)
317 ret = auxtrace_mmap__read_snapshot(mm, rec->itr, &rec->tool,
318 record__process_auxtrace,
319 rec->opts.auxtrace_snapshot_size);
329 static int record__auxtrace_read_snapshot_all(struct record *rec)
334 for (i = 0; i < rec->evlist->nr_mmaps; i++) {
335 struct auxtrace_mmap *mm =
336 &rec->evlist->mmap[i].auxtrace_mmap;
341 if (record__auxtrace_mmap_read_snapshot(rec, mm) != 0) {
350 static void record__read_auxtrace_snapshot(struct record *rec)
352 pr_debug("Recording AUX area tracing snapshot\n");
353 if (record__auxtrace_read_snapshot_all(rec) < 0) {
354 trigger_error(&auxtrace_snapshot_trigger);
356 if (auxtrace_record__snapshot_finish(rec->itr))
357 trigger_error(&auxtrace_snapshot_trigger);
359 trigger_ready(&auxtrace_snapshot_trigger);
366 int record__auxtrace_mmap_read(struct record *rec __maybe_unused,
367 struct auxtrace_mmap *mm __maybe_unused)
373 void record__read_auxtrace_snapshot(struct record *rec __maybe_unused)
378 int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused)
385 static int record__mmap_evlist(struct record *rec,
386 struct perf_evlist *evlist)
388 struct record_opts *opts = &rec->opts;
391 if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false,
392 opts->auxtrace_mmap_pages,
393 opts->auxtrace_snapshot_mode) < 0) {
394 if (errno == EPERM) {
395 pr_err("Permission error mapping pages.\n"
396 "Consider increasing "
397 "/proc/sys/kernel/perf_event_mlock_kb,\n"
398 "or try again with a smaller value of -m/--mmap_pages.\n"
399 "(current value: %u,%u)\n",
400 opts->mmap_pages, opts->auxtrace_mmap_pages);
403 pr_err("failed to mmap with %d (%s)\n", errno,
404 str_error_r(errno, msg, sizeof(msg)));
414 static int record__mmap(struct record *rec)
416 return record__mmap_evlist(rec, rec->evlist);
419 static int record__open(struct record *rec)
422 struct perf_evsel *pos;
423 struct perf_evlist *evlist = rec->evlist;
424 struct perf_session *session = rec->session;
425 struct record_opts *opts = &rec->opts;
426 struct perf_evsel_config_term *err_term;
429 perf_evlist__config(evlist, opts, &callchain_param);
431 evlist__for_each_entry(evlist, pos) {
433 if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) {
434 if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) {
436 ui__warning("%s\n", msg);
441 perf_evsel__open_strerror(pos, &opts->target,
442 errno, msg, sizeof(msg));
443 ui__error("%s\n", msg);
448 if (perf_evlist__apply_filters(evlist, &pos)) {
449 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
450 pos->filter, perf_evsel__name(pos), errno,
451 str_error_r(errno, msg, sizeof(msg)));
456 if (perf_evlist__apply_drv_configs(evlist, &pos, &err_term)) {
457 error("failed to set config \"%s\" on event %s with %d (%s)\n",
458 err_term->val.drv_cfg, perf_evsel__name(pos), errno,
459 str_error_r(errno, msg, sizeof(msg)));
464 rc = record__mmap(rec);
468 session->evlist = evlist;
469 perf_session__set_id_hdr_size(session);
474 static int process_sample_event(struct perf_tool *tool,
475 union perf_event *event,
476 struct perf_sample *sample,
477 struct perf_evsel *evsel,
478 struct machine *machine)
480 struct record *rec = container_of(tool, struct record, tool);
484 return build_id__mark_dso_hit(tool, event, sample, evsel, machine);
487 static int process_buildids(struct record *rec)
489 struct perf_data_file *file = &rec->file;
490 struct perf_session *session = rec->session;
496 * During this process, it'll load kernel map and replace the
497 * dso->long_name to a real pathname it found. In this case
498 * we prefer the vmlinux path like
499 * /lib/modules/3.16.4/build/vmlinux
501 * rather than build-id path (in debug directory).
502 * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551
504 symbol_conf.ignore_vmlinux_buildid = true;
507 * If --buildid-all is given, it marks all DSO regardless of hits,
508 * so no need to process samples.
510 if (rec->buildid_all)
511 rec->tool.sample = NULL;
513 return perf_session__process_events(session);
516 static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
519 struct perf_tool *tool = data;
521 *As for guest kernel when processing subcommand record&report,
522 *we arrange module mmap prior to guest kernel mmap and trigger
523 *a preload dso because default guest module symbols are loaded
524 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
525 *method is used to avoid symbol missing when the first addr is
526 *in module instead of in guest kernel.
528 err = perf_event__synthesize_modules(tool, process_synthesized_event,
531 pr_err("Couldn't record guest kernel [%d]'s reference"
532 " relocation symbol.\n", machine->pid);
535 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
536 * have no _text sometimes.
538 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
541 pr_err("Couldn't record guest kernel [%d]'s reference"
542 " relocation symbol.\n", machine->pid);
545 static struct perf_event_header finished_round_event = {
546 .size = sizeof(struct perf_event_header),
547 .type = PERF_RECORD_FINISHED_ROUND,
550 static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist,
553 u64 bytes_written = rec->bytes_written;
556 struct perf_mmap *maps;
561 maps = backward ? evlist->backward_mmap : evlist->mmap;
565 if (backward && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING)
568 for (i = 0; i < evlist->nr_mmaps; i++) {
569 struct auxtrace_mmap *mm = &maps[i].auxtrace_mmap;
572 if (record__mmap_read(rec, &maps[i],
573 evlist->overwrite, backward) != 0) {
579 if (mm->base && !rec->opts.auxtrace_snapshot_mode &&
580 record__auxtrace_mmap_read(rec, mm) != 0) {
587 * Mark the round finished in case we wrote
588 * at least one event.
590 if (bytes_written != rec->bytes_written)
591 rc = record__write(rec, &finished_round_event, sizeof(finished_round_event));
594 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
599 static int record__mmap_read_all(struct record *rec)
603 err = record__mmap_read_evlist(rec, rec->evlist, false);
607 return record__mmap_read_evlist(rec, rec->evlist, true);
610 static void record__init_features(struct record *rec)
612 struct perf_session *session = rec->session;
615 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
616 perf_header__set_feat(&session->header, feat);
619 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
621 if (!have_tracepoints(&rec->evlist->entries))
622 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
624 if (!rec->opts.branch_stack)
625 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
627 if (!rec->opts.full_auxtrace)
628 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
630 perf_header__clear_feat(&session->header, HEADER_STAT);
634 record__finish_output(struct record *rec)
636 struct perf_data_file *file = &rec->file;
637 int fd = perf_data_file__fd(file);
642 rec->session->header.data_size += rec->bytes_written;
643 file->size = lseek(perf_data_file__fd(file), 0, SEEK_CUR);
645 if (!rec->no_buildid) {
646 process_buildids(rec);
648 if (rec->buildid_all)
649 dsos__hit_all(rec->session);
651 perf_session__write_header(rec->session, rec->evlist, fd, true);
656 static int record__synthesize_workload(struct record *rec, bool tail)
659 struct thread_map *thread_map;
661 if (rec->opts.tail_synthesize != tail)
664 thread_map = thread_map__new_by_tid(rec->evlist->workload.pid);
665 if (thread_map == NULL)
668 err = perf_event__synthesize_thread_map(&rec->tool, thread_map,
669 process_synthesized_event,
670 &rec->session->machines.host,
671 rec->opts.sample_address,
672 rec->opts.proc_map_timeout);
673 thread_map__put(thread_map);
677 static int record__synthesize(struct record *rec, bool tail);
680 record__switch_output(struct record *rec, bool at_exit)
682 struct perf_data_file *file = &rec->file;
685 /* Same Size: "2015122520103046"*/
686 char timestamp[] = "InvalidTimestamp";
688 record__synthesize(rec, true);
689 if (target__none(&rec->opts.target))
690 record__synthesize_workload(rec, true);
693 record__finish_output(rec);
694 err = fetch_current_timestamp(timestamp, sizeof(timestamp));
696 pr_err("Failed to get current timestamp\n");
700 fd = perf_data_file__switch(file, timestamp,
701 rec->session->header.data_offset,
703 if (fd >= 0 && !at_exit) {
704 rec->bytes_written = 0;
705 rec->session->header.data_size = 0;
709 fprintf(stderr, "[ perf record: Dump %s.%s ]\n",
710 file->path, timestamp);
712 /* Output tracking events */
714 record__synthesize(rec, false);
717 * In 'perf record --switch-output' without -a,
718 * record__synthesize() in record__switch_output() won't
719 * generate tracking events because there's no thread_map
720 * in evlist. Which causes newly created perf.data doesn't
721 * contain map and comm information.
722 * Create a fake thread_map and directly call
723 * perf_event__synthesize_thread_map() for those events.
725 if (target__none(&rec->opts.target))
726 record__synthesize_workload(rec, false);
731 static volatile int workload_exec_errno;
734 * perf_evlist__prepare_workload will send a SIGUSR1
735 * if the fork fails, since we asked by setting its
736 * want_signal to true.
738 static void workload_exec_failed_signal(int signo __maybe_unused,
740 void *ucontext __maybe_unused)
742 workload_exec_errno = info->si_value.sival_int;
747 static void snapshot_sig_handler(int sig);
748 static void alarm_sig_handler(int sig);
751 perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused,
752 struct perf_tool *tool __maybe_unused,
753 perf_event__handler_t process __maybe_unused,
754 struct machine *machine __maybe_unused)
759 static const struct perf_event_mmap_page *
760 perf_evlist__pick_pc(struct perf_evlist *evlist)
763 if (evlist->mmap && evlist->mmap[0].base)
764 return evlist->mmap[0].base;
765 if (evlist->backward_mmap && evlist->backward_mmap[0].base)
766 return evlist->backward_mmap[0].base;
771 static const struct perf_event_mmap_page *record__pick_pc(struct record *rec)
773 const struct perf_event_mmap_page *pc;
775 pc = perf_evlist__pick_pc(rec->evlist);
781 static int record__synthesize(struct record *rec, bool tail)
783 struct perf_session *session = rec->session;
784 struct machine *machine = &session->machines.host;
785 struct perf_data_file *file = &rec->file;
786 struct record_opts *opts = &rec->opts;
787 struct perf_tool *tool = &rec->tool;
788 int fd = perf_data_file__fd(file);
791 if (rec->opts.tail_synthesize != tail)
795 err = perf_event__synthesize_attrs(tool, session,
796 process_synthesized_event);
798 pr_err("Couldn't synthesize attrs.\n");
802 if (have_tracepoints(&rec->evlist->entries)) {
804 * FIXME err <= 0 here actually means that
805 * there were no tracepoints so its not really
806 * an error, just that we don't need to
807 * synthesize anything. We really have to
808 * return this more properly and also
809 * propagate errors that now are calling die()
811 err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist,
812 process_synthesized_event);
814 pr_err("Couldn't record tracing data.\n");
817 rec->bytes_written += err;
821 err = perf_event__synth_time_conv(record__pick_pc(rec), tool,
822 process_synthesized_event, machine);
826 if (rec->opts.full_auxtrace) {
827 err = perf_event__synthesize_auxtrace_info(rec->itr, tool,
828 session, process_synthesized_event);
833 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
835 WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n"
836 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
837 "Check /proc/kallsyms permission or run as root.\n");
839 err = perf_event__synthesize_modules(tool, process_synthesized_event,
841 WARN_ONCE(err < 0, "Couldn't record kernel module information.\n"
842 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
843 "Check /proc/modules permission or run as root.\n");
846 machines__process_guests(&session->machines,
847 perf_event__synthesize_guest_os, tool);
850 err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads,
851 process_synthesized_event, opts->sample_address,
852 opts->proc_map_timeout);
857 static int __cmd_record(struct record *rec, int argc, const char **argv)
861 unsigned long waking = 0;
862 const bool forks = argc > 0;
863 struct machine *machine;
864 struct perf_tool *tool = &rec->tool;
865 struct record_opts *opts = &rec->opts;
866 struct perf_data_file *file = &rec->file;
867 struct perf_session *session;
868 bool disabled = false, draining = false;
871 rec->progname = argv[0];
873 atexit(record__sig_exit);
874 signal(SIGCHLD, sig_handler);
875 signal(SIGINT, sig_handler);
876 signal(SIGTERM, sig_handler);
877 signal(SIGSEGV, sigsegv_handler);
879 if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) {
880 signal(SIGUSR2, snapshot_sig_handler);
881 if (rec->opts.auxtrace_snapshot_mode)
882 trigger_on(&auxtrace_snapshot_trigger);
883 if (rec->switch_output.enabled)
884 trigger_on(&switch_output_trigger);
886 signal(SIGUSR2, SIG_IGN);
889 session = perf_session__new(file, false, tool);
890 if (session == NULL) {
891 pr_err("Perf session creation failed.\n");
895 fd = perf_data_file__fd(file);
896 rec->session = session;
898 record__init_features(rec);
901 err = perf_evlist__prepare_workload(rec->evlist, &opts->target,
903 workload_exec_failed_signal);
905 pr_err("Couldn't run the workload!\n");
907 goto out_delete_session;
911 if (record__open(rec) != 0) {
916 err = bpf__apply_obj_config();
920 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
921 pr_err("ERROR: Apply config to BPF failed: %s\n",
927 * Normally perf_session__new would do this, but it doesn't have the
930 if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) {
931 pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n");
932 rec->tool.ordered_events = false;
935 if (!rec->evlist->nr_groups)
936 perf_header__clear_feat(&session->header, HEADER_GROUP_DESC);
939 err = perf_header__write_pipe(fd);
943 err = perf_session__write_header(session, rec->evlist, fd, false);
949 && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
950 pr_err("Couldn't generate buildids. "
951 "Use --no-buildid to profile anyway.\n");
956 machine = &session->machines.host;
958 err = record__synthesize(rec, false);
962 if (rec->realtime_prio) {
963 struct sched_param param;
965 param.sched_priority = rec->realtime_prio;
966 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
967 pr_err("Could not set realtime priority.\n");
974 * When perf is starting the traced process, all the events
975 * (apart from group members) have enable_on_exec=1 set,
976 * so don't spoil it by prematurely enabling them.
978 if (!target__none(&opts->target) && !opts->initial_delay)
979 perf_evlist__enable(rec->evlist);
985 union perf_event *event;
987 event = malloc(sizeof(event->comm) + machine->id_hdr_size);
994 * Some H/W events are generated before COMM event
995 * which is emitted during exec(), so perf script
996 * cannot see a correct process name for those events.
997 * Synthesize COMM event to prevent it.
999 perf_event__synthesize_comm(tool, event,
1000 rec->evlist->workload.pid,
1001 process_synthesized_event,
1005 perf_evlist__start_workload(rec->evlist);
1008 if (opts->initial_delay) {
1009 usleep(opts->initial_delay * USEC_PER_MSEC);
1010 perf_evlist__enable(rec->evlist);
1013 trigger_ready(&auxtrace_snapshot_trigger);
1014 trigger_ready(&switch_output_trigger);
1015 perf_hooks__invoke_record_start();
1017 unsigned long long hits = rec->samples;
1020 * rec->evlist->bkw_mmap_state is possible to be
1021 * BKW_MMAP_EMPTY here: when done == true and
1022 * hits != rec->samples in previous round.
1024 * perf_evlist__toggle_bkw_mmap ensure we never
1025 * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING.
1027 if (trigger_is_hit(&switch_output_trigger) || done || draining)
1028 perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING);
1030 if (record__mmap_read_all(rec) < 0) {
1031 trigger_error(&auxtrace_snapshot_trigger);
1032 trigger_error(&switch_output_trigger);
1037 if (auxtrace_record__snapshot_started) {
1038 auxtrace_record__snapshot_started = 0;
1039 if (!trigger_is_error(&auxtrace_snapshot_trigger))
1040 record__read_auxtrace_snapshot(rec);
1041 if (trigger_is_error(&auxtrace_snapshot_trigger)) {
1042 pr_err("AUX area tracing snapshot failed\n");
1048 if (trigger_is_hit(&switch_output_trigger)) {
1050 * If switch_output_trigger is hit, the data in
1051 * overwritable ring buffer should have been collected,
1052 * so bkw_mmap_state should be set to BKW_MMAP_EMPTY.
1054 * If SIGUSR2 raise after or during record__mmap_read_all(),
1055 * record__mmap_read_all() didn't collect data from
1056 * overwritable ring buffer. Read again.
1058 if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING)
1060 trigger_ready(&switch_output_trigger);
1063 * Reenable events in overwrite ring buffer after
1064 * record__mmap_read_all(): we should have collected
1067 perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING);
1070 fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n",
1073 fd = record__switch_output(rec, false);
1075 pr_err("Failed to switch to new file\n");
1076 trigger_error(&switch_output_trigger);
1081 /* re-arm the alarm */
1082 if (rec->switch_output.time)
1083 alarm(rec->switch_output.time);
1086 if (hits == rec->samples) {
1087 if (done || draining)
1089 err = perf_evlist__poll(rec->evlist, -1);
1091 * Propagate error, only if there's any. Ignore positive
1092 * number of returned events and interrupt error.
1094 if (err > 0 || (err < 0 && errno == EINTR))
1098 if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0)
1103 * When perf is starting the traced process, at the end events
1104 * die with the process and we wait for that. Thus no need to
1105 * disable events in this case.
1107 if (done && !disabled && !target__none(&opts->target)) {
1108 trigger_off(&auxtrace_snapshot_trigger);
1109 perf_evlist__disable(rec->evlist);
1113 trigger_off(&auxtrace_snapshot_trigger);
1114 trigger_off(&switch_output_trigger);
1116 if (forks && workload_exec_errno) {
1117 char msg[STRERR_BUFSIZE];
1118 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
1119 pr_err("Workload failed: %s\n", emsg);
1125 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
1127 if (target__none(&rec->opts.target))
1128 record__synthesize_workload(rec, true);
1134 if (!child_finished)
1135 kill(rec->evlist->workload.pid, SIGTERM);
1141 else if (WIFEXITED(exit_status))
1142 status = WEXITSTATUS(exit_status);
1143 else if (WIFSIGNALED(exit_status))
1144 signr = WTERMSIG(exit_status);
1148 record__synthesize(rec, true);
1149 /* this will be recalculated during process_buildids() */
1153 if (!rec->timestamp_filename) {
1154 record__finish_output(rec);
1156 fd = record__switch_output(rec, true);
1159 goto out_delete_session;
1164 perf_hooks__invoke_record_end();
1166 if (!err && !quiet) {
1168 const char *postfix = rec->timestamp_filename ?
1169 ".<timestamp>" : "";
1171 if (rec->samples && !rec->opts.full_auxtrace)
1172 scnprintf(samples, sizeof(samples),
1173 " (%" PRIu64 " samples)", rec->samples);
1177 fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n",
1178 perf_data_file__size(file) / 1024.0 / 1024.0,
1179 file->path, postfix, samples);
1183 perf_session__delete(session);
1187 static void callchain_debug(struct callchain_param *callchain)
1189 static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" };
1191 pr_debug("callchain: type %s\n", str[callchain->record_mode]);
1193 if (callchain->record_mode == CALLCHAIN_DWARF)
1194 pr_debug("callchain: stack dump size %d\n",
1195 callchain->dump_size);
1198 int record_opts__parse_callchain(struct record_opts *record,
1199 struct callchain_param *callchain,
1200 const char *arg, bool unset)
1203 callchain->enabled = !unset;
1205 /* --no-call-graph */
1207 callchain->record_mode = CALLCHAIN_NONE;
1208 pr_debug("callchain: disabled\n");
1212 ret = parse_callchain_record_opt(arg, callchain);
1214 /* Enable data address sampling for DWARF unwind. */
1215 if (callchain->record_mode == CALLCHAIN_DWARF)
1216 record->sample_address = true;
1217 callchain_debug(callchain);
1223 int record_parse_callchain_opt(const struct option *opt,
1227 return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset);
1230 int record_callchain_opt(const struct option *opt,
1231 const char *arg __maybe_unused,
1232 int unset __maybe_unused)
1234 struct callchain_param *callchain = opt->value;
1236 callchain->enabled = true;
1238 if (callchain->record_mode == CALLCHAIN_NONE)
1239 callchain->record_mode = CALLCHAIN_FP;
1241 callchain_debug(callchain);
1245 static int perf_record_config(const char *var, const char *value, void *cb)
1247 struct record *rec = cb;
1249 if (!strcmp(var, "record.build-id")) {
1250 if (!strcmp(value, "cache"))
1251 rec->no_buildid_cache = false;
1252 else if (!strcmp(value, "no-cache"))
1253 rec->no_buildid_cache = true;
1254 else if (!strcmp(value, "skip"))
1255 rec->no_buildid = true;
1260 if (!strcmp(var, "record.call-graph"))
1261 var = "call-graph.record-mode"; /* fall-through */
1263 return perf_default_config(var, value, cb);
1266 struct clockid_map {
1271 #define CLOCKID_MAP(n, c) \
1272 { .name = n, .clockid = (c), }
1274 #define CLOCKID_END { .name = NULL, }
1278 * Add the missing ones, we need to build on many distros...
1280 #ifndef CLOCK_MONOTONIC_RAW
1281 #define CLOCK_MONOTONIC_RAW 4
1283 #ifndef CLOCK_BOOTTIME
1284 #define CLOCK_BOOTTIME 7
1287 #define CLOCK_TAI 11
1290 static const struct clockid_map clockids[] = {
1291 /* available for all events, NMI safe */
1292 CLOCKID_MAP("monotonic", CLOCK_MONOTONIC),
1293 CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW),
1295 /* available for some events */
1296 CLOCKID_MAP("realtime", CLOCK_REALTIME),
1297 CLOCKID_MAP("boottime", CLOCK_BOOTTIME),
1298 CLOCKID_MAP("tai", CLOCK_TAI),
1300 /* available for the lazy */
1301 CLOCKID_MAP("mono", CLOCK_MONOTONIC),
1302 CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW),
1303 CLOCKID_MAP("real", CLOCK_REALTIME),
1304 CLOCKID_MAP("boot", CLOCK_BOOTTIME),
1309 static int parse_clockid(const struct option *opt, const char *str, int unset)
1311 struct record_opts *opts = (struct record_opts *)opt->value;
1312 const struct clockid_map *cm;
1313 const char *ostr = str;
1316 opts->use_clockid = 0;
1324 /* no setting it twice */
1325 if (opts->use_clockid)
1328 opts->use_clockid = true;
1330 /* if its a number, we're done */
1331 if (sscanf(str, "%d", &opts->clockid) == 1)
1334 /* allow a "CLOCK_" prefix to the name */
1335 if (!strncasecmp(str, "CLOCK_", 6))
1338 for (cm = clockids; cm->name; cm++) {
1339 if (!strcasecmp(str, cm->name)) {
1340 opts->clockid = cm->clockid;
1345 opts->use_clockid = false;
1346 ui__warning("unknown clockid %s, check man page\n", ostr);
1350 static int record__parse_mmap_pages(const struct option *opt,
1352 int unset __maybe_unused)
1354 struct record_opts *opts = opt->value;
1356 unsigned int mmap_pages;
1371 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s);
1374 opts->mmap_pages = mmap_pages;
1382 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1);
1386 opts->auxtrace_mmap_pages = mmap_pages;
1393 static void switch_output_size_warn(struct record *rec)
1395 u64 wakeup_size = perf_evlist__mmap_size(rec->opts.mmap_pages);
1396 struct switch_output *s = &rec->switch_output;
1400 if (s->size < wakeup_size) {
1403 unit_number__scnprintf(buf, sizeof(buf), wakeup_size);
1404 pr_warning("WARNING: switch-output data size lower than "
1405 "wakeup kernel buffer size (%s) "
1406 "expect bigger perf.data sizes\n", buf);
1410 static int switch_output_setup(struct record *rec)
1412 struct switch_output *s = &rec->switch_output;
1413 static struct parse_tag tags_size[] = {
1414 { .tag = 'B', .mult = 1 },
1415 { .tag = 'K', .mult = 1 << 10 },
1416 { .tag = 'M', .mult = 1 << 20 },
1417 { .tag = 'G', .mult = 1 << 30 },
1420 static struct parse_tag tags_time[] = {
1421 { .tag = 's', .mult = 1 },
1422 { .tag = 'm', .mult = 60 },
1423 { .tag = 'h', .mult = 60*60 },
1424 { .tag = 'd', .mult = 60*60*24 },
1432 if (!strcmp(s->str, "signal")) {
1434 pr_debug("switch-output with SIGUSR2 signal\n");
1438 val = parse_tag_value(s->str, tags_size);
1439 if (val != (unsigned long) -1) {
1441 pr_debug("switch-output with %s size threshold\n", s->str);
1445 val = parse_tag_value(s->str, tags_time);
1446 if (val != (unsigned long) -1) {
1448 pr_debug("switch-output with %s time threshold (%lu seconds)\n",
1456 rec->timestamp_filename = true;
1459 if (s->size && !rec->opts.no_buffering)
1460 switch_output_size_warn(rec);
1465 static const char * const __record_usage[] = {
1466 "perf record [<options>] [<command>]",
1467 "perf record [<options>] -- <command> [<options>]",
1470 const char * const *record_usage = __record_usage;
1473 * XXX Ideally would be local to cmd_record() and passed to a record__new
1474 * because we need to have access to it in record__exit, that is called
1475 * after cmd_record() exits, but since record_options need to be accessible to
1476 * builtin-script, leave it here.
1478 * At least we don't ouch it in all the other functions here directly.
1480 * Just say no to tons of global variables, sigh.
1482 static struct record record = {
1484 .sample_time = true,
1485 .mmap_pages = UINT_MAX,
1486 .user_freq = UINT_MAX,
1487 .user_interval = ULLONG_MAX,
1491 .default_per_cpu = true,
1493 .proc_map_timeout = 500,
1496 .sample = process_sample_event,
1497 .fork = perf_event__process_fork,
1498 .exit = perf_event__process_exit,
1499 .comm = perf_event__process_comm,
1500 .mmap = perf_event__process_mmap,
1501 .mmap2 = perf_event__process_mmap2,
1502 .ordered_events = true,
1506 const char record_callchain_help[] = CALLCHAIN_RECORD_HELP
1507 "\n\t\t\t\tDefault: fp";
1509 static bool dry_run;
1512 * XXX Will stay a global variable till we fix builtin-script.c to stop messing
1513 * with it and switch to use the library functions in perf_evlist that came
1514 * from builtin-record.c, i.e. use record_opts,
1515 * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
1518 static struct option __record_options[] = {
1519 OPT_CALLBACK('e', "event", &record.evlist, "event",
1520 "event selector. use 'perf list' to list available events",
1521 parse_events_option),
1522 OPT_CALLBACK(0, "filter", &record.evlist, "filter",
1523 "event filter", parse_filter),
1524 OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist,
1525 NULL, "don't record events from perf itself",
1527 OPT_STRING('p', "pid", &record.opts.target.pid, "pid",
1528 "record events on existing process id"),
1529 OPT_STRING('t', "tid", &record.opts.target.tid, "tid",
1530 "record events on existing thread id"),
1531 OPT_INTEGER('r', "realtime", &record.realtime_prio,
1532 "collect data with this RT SCHED_FIFO priority"),
1533 OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering,
1534 "collect data without buffering"),
1535 OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples,
1536 "collect raw sample records from all opened counters"),
1537 OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide,
1538 "system-wide collection from all CPUs"),
1539 OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
1540 "list of cpus to monitor"),
1541 OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
1542 OPT_STRING('o', "output", &record.file.path, "file",
1543 "output file name"),
1544 OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
1545 &record.opts.no_inherit_set,
1546 "child tasks do not inherit counters"),
1547 OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize,
1548 "synthesize non-sample events at the end of output"),
1549 OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"),
1550 OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"),
1551 OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]",
1552 "number of mmap data pages and AUX area tracing mmap pages",
1553 record__parse_mmap_pages),
1554 OPT_BOOLEAN(0, "group", &record.opts.group,
1555 "put the counters into a counter group"),
1556 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1557 NULL, "enables call-graph recording" ,
1558 &record_callchain_opt),
1559 OPT_CALLBACK(0, "call-graph", &record.opts,
1560 "record_mode[,record_size]", record_callchain_help,
1561 &record_parse_callchain_opt),
1562 OPT_INCR('v', "verbose", &verbose,
1563 "be more verbose (show counter open errors, etc)"),
1564 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
1565 OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
1566 "per thread counts"),
1567 OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"),
1568 OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"),
1569 OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
1570 &record.opts.sample_time_set,
1571 "Record the sample timestamps"),
1572 OPT_BOOLEAN('P', "period", &record.opts.period, "Record the sample period"),
1573 OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
1575 OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache,
1576 &record.no_buildid_cache_set,
1577 "do not update the buildid cache"),
1578 OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid,
1579 &record.no_buildid_set,
1580 "do not collect buildids in perf.data"),
1581 OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
1582 "monitor event in cgroup name only",
1584 OPT_UINTEGER('D', "delay", &record.opts.initial_delay,
1585 "ms to wait before starting measurement after program start"),
1586 OPT_STRING('u', "uid", &record.opts.target.uid_str, "user",
1589 OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack,
1590 "branch any", "sample any taken branches",
1591 parse_branch_stack),
1593 OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
1594 "branch filter mask", "branch stack filter modes",
1595 parse_branch_stack),
1596 OPT_BOOLEAN('W', "weight", &record.opts.sample_weight,
1597 "sample by weight (on special events only)"),
1598 OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction,
1599 "sample transaction flags (special events only)"),
1600 OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread,
1601 "use per-thread mmaps"),
1602 OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register",
1603 "sample selected machine registers on interrupt,"
1604 " use -I ? to list register names", parse_regs),
1605 OPT_BOOLEAN(0, "running-time", &record.opts.running_time,
1606 "Record running/enabled time of read (:S) events"),
1607 OPT_CALLBACK('k', "clockid", &record.opts,
1608 "clockid", "clockid to use for events, see clock_gettime()",
1610 OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts,
1611 "opts", "AUX area tracing Snapshot Mode", ""),
1612 OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout,
1613 "per thread proc mmap processing timeout in ms"),
1614 OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events,
1615 "Record context switch events"),
1616 OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel,
1617 "Configure all used events to run in kernel space.",
1618 PARSE_OPT_EXCLUSIVE),
1619 OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user,
1620 "Configure all used events to run in user space.",
1621 PARSE_OPT_EXCLUSIVE),
1622 OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path",
1623 "clang binary to use for compiling BPF scriptlets"),
1624 OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options",
1625 "options passed to clang when compiling BPF scriptlets"),
1626 OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name,
1627 "file", "vmlinux pathname"),
1628 OPT_BOOLEAN(0, "buildid-all", &record.buildid_all,
1629 "Record build-id of all DSOs regardless of hits"),
1630 OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename,
1631 "append timestamp to output filename"),
1632 OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str,
1633 &record.switch_output.set, "signal,size,time",
1634 "Switch output when receive SIGUSR2 or cross size,time threshold",
1636 OPT_BOOLEAN(0, "dry-run", &dry_run,
1637 "Parse options then exit"),
1641 struct option *record_options = __record_options;
1643 int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
1646 struct record *rec = &record;
1647 char errbuf[BUFSIZ];
1649 #ifndef HAVE_LIBBPF_SUPPORT
1650 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c)
1651 set_nobuild('\0', "clang-path", true);
1652 set_nobuild('\0', "clang-opt", true);
1656 #ifndef HAVE_BPF_PROLOGUE
1657 # if !defined (HAVE_DWARF_SUPPORT)
1658 # define REASON "NO_DWARF=1"
1659 # elif !defined (HAVE_LIBBPF_SUPPORT)
1660 # define REASON "NO_LIBBPF=1"
1662 # define REASON "this architecture doesn't support BPF prologue"
1664 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c)
1665 set_nobuild('\0', "vmlinux", true);
1670 rec->evlist = perf_evlist__new();
1671 if (rec->evlist == NULL)
1674 err = perf_config(perf_record_config, rec);
1678 argc = parse_options(argc, argv, record_options, record_usage,
1679 PARSE_OPT_STOP_AT_NON_OPTION);
1680 if (!argc && target__none(&rec->opts.target))
1681 usage_with_options(record_usage, record_options);
1683 if (nr_cgroups && !rec->opts.target.system_wide) {
1684 usage_with_options_msg(record_usage, record_options,
1685 "cgroup monitoring only available in system-wide mode");
1688 if (rec->opts.record_switch_events &&
1689 !perf_can_record_switch_events()) {
1690 ui__error("kernel does not support recording context switch events\n");
1691 parse_options_usage(record_usage, record_options, "switch-events", 0);
1695 if (switch_output_setup(rec)) {
1696 parse_options_usage(record_usage, record_options, "switch-output", 0);
1700 if (rec->switch_output.time) {
1701 signal(SIGALRM, alarm_sig_handler);
1702 alarm(rec->switch_output.time);
1706 rec->itr = auxtrace_record__init(rec->evlist, &err);
1711 err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts,
1712 rec->opts.auxtrace_snapshot_opts);
1717 * Allow aliases to facilitate the lookup of symbols for address
1718 * filters. Refer to auxtrace_parse_filters().
1720 symbol_conf.allow_aliases = true;
1724 err = auxtrace_parse_filters(rec->evlist);
1731 err = bpf__setup_stdout(rec->evlist);
1733 bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf));
1734 pr_err("ERROR: Setup BPF stdout failed: %s\n",
1741 if (symbol_conf.kptr_restrict)
1743 "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
1744 "check /proc/sys/kernel/kptr_restrict.\n\n"
1745 "Samples in kernel functions may not be resolved if a suitable vmlinux\n"
1746 "file is not found in the buildid cache or in the vmlinux path.\n\n"
1747 "Samples in kernel modules won't be resolved at all.\n\n"
1748 "If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
1749 "even with a suitable vmlinux or kallsyms file.\n\n");
1751 if (rec->no_buildid_cache || rec->no_buildid) {
1752 disable_buildid_cache();
1753 } else if (rec->switch_output.enabled) {
1755 * In 'perf record --switch-output', disable buildid
1756 * generation by default to reduce data file switching
1757 * overhead. Still generate buildid if they are required
1760 * perf record --switch-output --no-no-buildid \
1761 * --no-no-buildid-cache
1763 * Following code equals to:
1765 * if ((rec->no_buildid || !rec->no_buildid_set) &&
1766 * (rec->no_buildid_cache || !rec->no_buildid_cache_set))
1767 * disable_buildid_cache();
1769 bool disable = true;
1771 if (rec->no_buildid_set && !rec->no_buildid)
1773 if (rec->no_buildid_cache_set && !rec->no_buildid_cache)
1776 rec->no_buildid = true;
1777 rec->no_buildid_cache = true;
1778 disable_buildid_cache();
1782 if (record.opts.overwrite)
1783 record.opts.tail_synthesize = true;
1785 if (rec->evlist->nr_entries == 0 &&
1786 perf_evlist__add_default(rec->evlist) < 0) {
1787 pr_err("Not enough memory for event selector list\n");
1791 if (rec->opts.target.tid && !rec->opts.no_inherit_set)
1792 rec->opts.no_inherit = true;
1794 err = target__validate(&rec->opts.target);
1796 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1797 ui__warning("%s", errbuf);
1800 err = target__parse_uid(&rec->opts.target);
1802 int saved_errno = errno;
1804 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1805 ui__error("%s", errbuf);
1811 /* Enable ignoring missing threads when -u option is defined. */
1812 rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX;
1815 if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0)
1816 usage_with_options(record_usage, record_options);
1818 err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts);
1823 * We take all buildids when the file contains
1824 * AUX area tracing data because we do not decode the
1825 * trace because it would take too long.
1827 if (rec->opts.full_auxtrace)
1828 rec->buildid_all = true;
1830 if (record_opts__config(&rec->opts)) {
1835 err = __cmd_record(&record, argc, argv);
1837 perf_evlist__delete(rec->evlist);
1839 auxtrace_record__free(rec->itr);
1843 static void snapshot_sig_handler(int sig __maybe_unused)
1845 struct record *rec = &record;
1847 if (trigger_is_ready(&auxtrace_snapshot_trigger)) {
1848 trigger_hit(&auxtrace_snapshot_trigger);
1849 auxtrace_record__snapshot_started = 1;
1850 if (auxtrace_record__snapshot_start(record.itr))
1851 trigger_error(&auxtrace_snapshot_trigger);
1854 if (switch_output_signal(rec))
1855 trigger_hit(&switch_output_trigger);
1858 static void alarm_sig_handler(int sig __maybe_unused)
1860 struct record *rec = &record;
1862 if (switch_output_time(rec))
1863 trigger_hit(&switch_output_trigger);