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 map;
660 struct thread_map_data map_data;
663 if (rec->opts.tail_synthesize != tail)
666 thread_map.map.nr = 1;
667 thread_map.map.map[0].pid = rec->evlist->workload.pid;
668 thread_map.map.map[0].comm = NULL;
669 return perf_event__synthesize_thread_map(&rec->tool, &thread_map.map,
670 process_synthesized_event,
671 &rec->session->machines.host,
672 rec->opts.sample_address,
673 rec->opts.proc_map_timeout);
676 static int record__synthesize(struct record *rec, bool tail);
679 record__switch_output(struct record *rec, bool at_exit)
681 struct perf_data_file *file = &rec->file;
684 /* Same Size: "2015122520103046"*/
685 char timestamp[] = "InvalidTimestamp";
687 record__synthesize(rec, true);
688 if (target__none(&rec->opts.target))
689 record__synthesize_workload(rec, true);
692 record__finish_output(rec);
693 err = fetch_current_timestamp(timestamp, sizeof(timestamp));
695 pr_err("Failed to get current timestamp\n");
699 fd = perf_data_file__switch(file, timestamp,
700 rec->session->header.data_offset,
702 if (fd >= 0 && !at_exit) {
703 rec->bytes_written = 0;
704 rec->session->header.data_size = 0;
708 fprintf(stderr, "[ perf record: Dump %s.%s ]\n",
709 file->path, timestamp);
711 /* Output tracking events */
713 record__synthesize(rec, false);
716 * In 'perf record --switch-output' without -a,
717 * record__synthesize() in record__switch_output() won't
718 * generate tracking events because there's no thread_map
719 * in evlist. Which causes newly created perf.data doesn't
720 * contain map and comm information.
721 * Create a fake thread_map and directly call
722 * perf_event__synthesize_thread_map() for those events.
724 if (target__none(&rec->opts.target))
725 record__synthesize_workload(rec, false);
730 static volatile int workload_exec_errno;
733 * perf_evlist__prepare_workload will send a SIGUSR1
734 * if the fork fails, since we asked by setting its
735 * want_signal to true.
737 static void workload_exec_failed_signal(int signo __maybe_unused,
739 void *ucontext __maybe_unused)
741 workload_exec_errno = info->si_value.sival_int;
746 static void snapshot_sig_handler(int sig);
747 static void alarm_sig_handler(int sig);
750 perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused,
751 struct perf_tool *tool __maybe_unused,
752 perf_event__handler_t process __maybe_unused,
753 struct machine *machine __maybe_unused)
758 static const struct perf_event_mmap_page *
759 perf_evlist__pick_pc(struct perf_evlist *evlist)
762 if (evlist->mmap && evlist->mmap[0].base)
763 return evlist->mmap[0].base;
764 if (evlist->backward_mmap && evlist->backward_mmap[0].base)
765 return evlist->backward_mmap[0].base;
770 static const struct perf_event_mmap_page *record__pick_pc(struct record *rec)
772 const struct perf_event_mmap_page *pc;
774 pc = perf_evlist__pick_pc(rec->evlist);
780 static int record__synthesize(struct record *rec, bool tail)
782 struct perf_session *session = rec->session;
783 struct machine *machine = &session->machines.host;
784 struct perf_data_file *file = &rec->file;
785 struct record_opts *opts = &rec->opts;
786 struct perf_tool *tool = &rec->tool;
787 int fd = perf_data_file__fd(file);
790 if (rec->opts.tail_synthesize != tail)
794 err = perf_event__synthesize_attrs(tool, session,
795 process_synthesized_event);
797 pr_err("Couldn't synthesize attrs.\n");
801 if (have_tracepoints(&rec->evlist->entries)) {
803 * FIXME err <= 0 here actually means that
804 * there were no tracepoints so its not really
805 * an error, just that we don't need to
806 * synthesize anything. We really have to
807 * return this more properly and also
808 * propagate errors that now are calling die()
810 err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist,
811 process_synthesized_event);
813 pr_err("Couldn't record tracing data.\n");
816 rec->bytes_written += err;
820 err = perf_event__synth_time_conv(record__pick_pc(rec), tool,
821 process_synthesized_event, machine);
825 if (rec->opts.full_auxtrace) {
826 err = perf_event__synthesize_auxtrace_info(rec->itr, tool,
827 session, process_synthesized_event);
832 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
834 WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n"
835 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
836 "Check /proc/kallsyms permission or run as root.\n");
838 err = perf_event__synthesize_modules(tool, process_synthesized_event,
840 WARN_ONCE(err < 0, "Couldn't record kernel module information.\n"
841 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
842 "Check /proc/modules permission or run as root.\n");
845 machines__process_guests(&session->machines,
846 perf_event__synthesize_guest_os, tool);
849 err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads,
850 process_synthesized_event, opts->sample_address,
851 opts->proc_map_timeout);
856 static int __cmd_record(struct record *rec, int argc, const char **argv)
860 unsigned long waking = 0;
861 const bool forks = argc > 0;
862 struct machine *machine;
863 struct perf_tool *tool = &rec->tool;
864 struct record_opts *opts = &rec->opts;
865 struct perf_data_file *file = &rec->file;
866 struct perf_session *session;
867 bool disabled = false, draining = false;
870 rec->progname = argv[0];
872 atexit(record__sig_exit);
873 signal(SIGCHLD, sig_handler);
874 signal(SIGINT, sig_handler);
875 signal(SIGTERM, sig_handler);
876 signal(SIGSEGV, sigsegv_handler);
878 if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) {
879 signal(SIGUSR2, snapshot_sig_handler);
880 if (rec->opts.auxtrace_snapshot_mode)
881 trigger_on(&auxtrace_snapshot_trigger);
882 if (rec->switch_output.enabled)
883 trigger_on(&switch_output_trigger);
885 signal(SIGUSR2, SIG_IGN);
888 session = perf_session__new(file, false, tool);
889 if (session == NULL) {
890 pr_err("Perf session creation failed.\n");
894 fd = perf_data_file__fd(file);
895 rec->session = session;
897 record__init_features(rec);
900 err = perf_evlist__prepare_workload(rec->evlist, &opts->target,
902 workload_exec_failed_signal);
904 pr_err("Couldn't run the workload!\n");
906 goto out_delete_session;
910 if (record__open(rec) != 0) {
915 err = bpf__apply_obj_config();
919 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
920 pr_err("ERROR: Apply config to BPF failed: %s\n",
926 * Normally perf_session__new would do this, but it doesn't have the
929 if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) {
930 pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n");
931 rec->tool.ordered_events = false;
934 if (!rec->evlist->nr_groups)
935 perf_header__clear_feat(&session->header, HEADER_GROUP_DESC);
938 err = perf_header__write_pipe(fd);
942 err = perf_session__write_header(session, rec->evlist, fd, false);
948 && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
949 pr_err("Couldn't generate buildids. "
950 "Use --no-buildid to profile anyway.\n");
955 machine = &session->machines.host;
957 err = record__synthesize(rec, false);
961 if (rec->realtime_prio) {
962 struct sched_param param;
964 param.sched_priority = rec->realtime_prio;
965 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
966 pr_err("Could not set realtime priority.\n");
973 * When perf is starting the traced process, all the events
974 * (apart from group members) have enable_on_exec=1 set,
975 * so don't spoil it by prematurely enabling them.
977 if (!target__none(&opts->target) && !opts->initial_delay)
978 perf_evlist__enable(rec->evlist);
984 union perf_event *event;
986 event = malloc(sizeof(event->comm) + machine->id_hdr_size);
993 * Some H/W events are generated before COMM event
994 * which is emitted during exec(), so perf script
995 * cannot see a correct process name for those events.
996 * Synthesize COMM event to prevent it.
998 perf_event__synthesize_comm(tool, event,
999 rec->evlist->workload.pid,
1000 process_synthesized_event,
1004 perf_evlist__start_workload(rec->evlist);
1007 if (opts->initial_delay) {
1008 usleep(opts->initial_delay * USEC_PER_MSEC);
1009 perf_evlist__enable(rec->evlist);
1012 trigger_ready(&auxtrace_snapshot_trigger);
1013 trigger_ready(&switch_output_trigger);
1014 perf_hooks__invoke_record_start();
1016 unsigned long long hits = rec->samples;
1019 * rec->evlist->bkw_mmap_state is possible to be
1020 * BKW_MMAP_EMPTY here: when done == true and
1021 * hits != rec->samples in previous round.
1023 * perf_evlist__toggle_bkw_mmap ensure we never
1024 * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING.
1026 if (trigger_is_hit(&switch_output_trigger) || done || draining)
1027 perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING);
1029 if (record__mmap_read_all(rec) < 0) {
1030 trigger_error(&auxtrace_snapshot_trigger);
1031 trigger_error(&switch_output_trigger);
1036 if (auxtrace_record__snapshot_started) {
1037 auxtrace_record__snapshot_started = 0;
1038 if (!trigger_is_error(&auxtrace_snapshot_trigger))
1039 record__read_auxtrace_snapshot(rec);
1040 if (trigger_is_error(&auxtrace_snapshot_trigger)) {
1041 pr_err("AUX area tracing snapshot failed\n");
1047 if (trigger_is_hit(&switch_output_trigger)) {
1049 * If switch_output_trigger is hit, the data in
1050 * overwritable ring buffer should have been collected,
1051 * so bkw_mmap_state should be set to BKW_MMAP_EMPTY.
1053 * If SIGUSR2 raise after or during record__mmap_read_all(),
1054 * record__mmap_read_all() didn't collect data from
1055 * overwritable ring buffer. Read again.
1057 if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING)
1059 trigger_ready(&switch_output_trigger);
1062 * Reenable events in overwrite ring buffer after
1063 * record__mmap_read_all(): we should have collected
1066 perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING);
1069 fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n",
1072 fd = record__switch_output(rec, false);
1074 pr_err("Failed to switch to new file\n");
1075 trigger_error(&switch_output_trigger);
1080 /* re-arm the alarm */
1081 if (rec->switch_output.time)
1082 alarm(rec->switch_output.time);
1085 if (hits == rec->samples) {
1086 if (done || draining)
1088 err = perf_evlist__poll(rec->evlist, -1);
1090 * Propagate error, only if there's any. Ignore positive
1091 * number of returned events and interrupt error.
1093 if (err > 0 || (err < 0 && errno == EINTR))
1097 if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0)
1102 * When perf is starting the traced process, at the end events
1103 * die with the process and we wait for that. Thus no need to
1104 * disable events in this case.
1106 if (done && !disabled && !target__none(&opts->target)) {
1107 trigger_off(&auxtrace_snapshot_trigger);
1108 perf_evlist__disable(rec->evlist);
1112 trigger_off(&auxtrace_snapshot_trigger);
1113 trigger_off(&switch_output_trigger);
1115 if (forks && workload_exec_errno) {
1116 char msg[STRERR_BUFSIZE];
1117 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
1118 pr_err("Workload failed: %s\n", emsg);
1124 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
1126 if (target__none(&rec->opts.target))
1127 record__synthesize_workload(rec, true);
1133 if (!child_finished)
1134 kill(rec->evlist->workload.pid, SIGTERM);
1140 else if (WIFEXITED(exit_status))
1141 status = WEXITSTATUS(exit_status);
1142 else if (WIFSIGNALED(exit_status))
1143 signr = WTERMSIG(exit_status);
1147 record__synthesize(rec, true);
1148 /* this will be recalculated during process_buildids() */
1152 if (!rec->timestamp_filename) {
1153 record__finish_output(rec);
1155 fd = record__switch_output(rec, true);
1158 goto out_delete_session;
1163 perf_hooks__invoke_record_end();
1165 if (!err && !quiet) {
1167 const char *postfix = rec->timestamp_filename ?
1168 ".<timestamp>" : "";
1170 if (rec->samples && !rec->opts.full_auxtrace)
1171 scnprintf(samples, sizeof(samples),
1172 " (%" PRIu64 " samples)", rec->samples);
1176 fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n",
1177 perf_data_file__size(file) / 1024.0 / 1024.0,
1178 file->path, postfix, samples);
1182 perf_session__delete(session);
1186 static void callchain_debug(struct callchain_param *callchain)
1188 static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" };
1190 pr_debug("callchain: type %s\n", str[callchain->record_mode]);
1192 if (callchain->record_mode == CALLCHAIN_DWARF)
1193 pr_debug("callchain: stack dump size %d\n",
1194 callchain->dump_size);
1197 int record_opts__parse_callchain(struct record_opts *record,
1198 struct callchain_param *callchain,
1199 const char *arg, bool unset)
1202 callchain->enabled = !unset;
1204 /* --no-call-graph */
1206 callchain->record_mode = CALLCHAIN_NONE;
1207 pr_debug("callchain: disabled\n");
1211 ret = parse_callchain_record_opt(arg, callchain);
1213 /* Enable data address sampling for DWARF unwind. */
1214 if (callchain->record_mode == CALLCHAIN_DWARF)
1215 record->sample_address = true;
1216 callchain_debug(callchain);
1222 int record_parse_callchain_opt(const struct option *opt,
1226 return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset);
1229 int record_callchain_opt(const struct option *opt,
1230 const char *arg __maybe_unused,
1231 int unset __maybe_unused)
1233 struct callchain_param *callchain = opt->value;
1235 callchain->enabled = true;
1237 if (callchain->record_mode == CALLCHAIN_NONE)
1238 callchain->record_mode = CALLCHAIN_FP;
1240 callchain_debug(callchain);
1244 static int perf_record_config(const char *var, const char *value, void *cb)
1246 struct record *rec = cb;
1248 if (!strcmp(var, "record.build-id")) {
1249 if (!strcmp(value, "cache"))
1250 rec->no_buildid_cache = false;
1251 else if (!strcmp(value, "no-cache"))
1252 rec->no_buildid_cache = true;
1253 else if (!strcmp(value, "skip"))
1254 rec->no_buildid = true;
1259 if (!strcmp(var, "record.call-graph"))
1260 var = "call-graph.record-mode"; /* fall-through */
1262 return perf_default_config(var, value, cb);
1265 struct clockid_map {
1270 #define CLOCKID_MAP(n, c) \
1271 { .name = n, .clockid = (c), }
1273 #define CLOCKID_END { .name = NULL, }
1277 * Add the missing ones, we need to build on many distros...
1279 #ifndef CLOCK_MONOTONIC_RAW
1280 #define CLOCK_MONOTONIC_RAW 4
1282 #ifndef CLOCK_BOOTTIME
1283 #define CLOCK_BOOTTIME 7
1286 #define CLOCK_TAI 11
1289 static const struct clockid_map clockids[] = {
1290 /* available for all events, NMI safe */
1291 CLOCKID_MAP("monotonic", CLOCK_MONOTONIC),
1292 CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW),
1294 /* available for some events */
1295 CLOCKID_MAP("realtime", CLOCK_REALTIME),
1296 CLOCKID_MAP("boottime", CLOCK_BOOTTIME),
1297 CLOCKID_MAP("tai", CLOCK_TAI),
1299 /* available for the lazy */
1300 CLOCKID_MAP("mono", CLOCK_MONOTONIC),
1301 CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW),
1302 CLOCKID_MAP("real", CLOCK_REALTIME),
1303 CLOCKID_MAP("boot", CLOCK_BOOTTIME),
1308 static int parse_clockid(const struct option *opt, const char *str, int unset)
1310 struct record_opts *opts = (struct record_opts *)opt->value;
1311 const struct clockid_map *cm;
1312 const char *ostr = str;
1315 opts->use_clockid = 0;
1323 /* no setting it twice */
1324 if (opts->use_clockid)
1327 opts->use_clockid = true;
1329 /* if its a number, we're done */
1330 if (sscanf(str, "%d", &opts->clockid) == 1)
1333 /* allow a "CLOCK_" prefix to the name */
1334 if (!strncasecmp(str, "CLOCK_", 6))
1337 for (cm = clockids; cm->name; cm++) {
1338 if (!strcasecmp(str, cm->name)) {
1339 opts->clockid = cm->clockid;
1344 opts->use_clockid = false;
1345 ui__warning("unknown clockid %s, check man page\n", ostr);
1349 static int record__parse_mmap_pages(const struct option *opt,
1351 int unset __maybe_unused)
1353 struct record_opts *opts = opt->value;
1355 unsigned int mmap_pages;
1370 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s);
1373 opts->mmap_pages = mmap_pages;
1381 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1);
1385 opts->auxtrace_mmap_pages = mmap_pages;
1392 static void switch_output_size_warn(struct record *rec)
1394 u64 wakeup_size = perf_evlist__mmap_size(rec->opts.mmap_pages);
1395 struct switch_output *s = &rec->switch_output;
1399 if (s->size < wakeup_size) {
1402 unit_number__scnprintf(buf, sizeof(buf), wakeup_size);
1403 pr_warning("WARNING: switch-output data size lower than "
1404 "wakeup kernel buffer size (%s) "
1405 "expect bigger perf.data sizes\n", buf);
1409 static int switch_output_setup(struct record *rec)
1411 struct switch_output *s = &rec->switch_output;
1412 static struct parse_tag tags_size[] = {
1413 { .tag = 'B', .mult = 1 },
1414 { .tag = 'K', .mult = 1 << 10 },
1415 { .tag = 'M', .mult = 1 << 20 },
1416 { .tag = 'G', .mult = 1 << 30 },
1419 static struct parse_tag tags_time[] = {
1420 { .tag = 's', .mult = 1 },
1421 { .tag = 'm', .mult = 60 },
1422 { .tag = 'h', .mult = 60*60 },
1423 { .tag = 'd', .mult = 60*60*24 },
1431 if (!strcmp(s->str, "signal")) {
1433 pr_debug("switch-output with SIGUSR2 signal\n");
1437 val = parse_tag_value(s->str, tags_size);
1438 if (val != (unsigned long) -1) {
1440 pr_debug("switch-output with %s size threshold\n", s->str);
1444 val = parse_tag_value(s->str, tags_time);
1445 if (val != (unsigned long) -1) {
1447 pr_debug("switch-output with %s time threshold (%lu seconds)\n",
1455 rec->timestamp_filename = true;
1458 if (s->size && !rec->opts.no_buffering)
1459 switch_output_size_warn(rec);
1464 static const char * const __record_usage[] = {
1465 "perf record [<options>] [<command>]",
1466 "perf record [<options>] -- <command> [<options>]",
1469 const char * const *record_usage = __record_usage;
1472 * XXX Ideally would be local to cmd_record() and passed to a record__new
1473 * because we need to have access to it in record__exit, that is called
1474 * after cmd_record() exits, but since record_options need to be accessible to
1475 * builtin-script, leave it here.
1477 * At least we don't ouch it in all the other functions here directly.
1479 * Just say no to tons of global variables, sigh.
1481 static struct record record = {
1483 .sample_time = true,
1484 .mmap_pages = UINT_MAX,
1485 .user_freq = UINT_MAX,
1486 .user_interval = ULLONG_MAX,
1490 .default_per_cpu = true,
1492 .proc_map_timeout = 500,
1495 .sample = process_sample_event,
1496 .fork = perf_event__process_fork,
1497 .exit = perf_event__process_exit,
1498 .comm = perf_event__process_comm,
1499 .mmap = perf_event__process_mmap,
1500 .mmap2 = perf_event__process_mmap2,
1501 .ordered_events = true,
1505 const char record_callchain_help[] = CALLCHAIN_RECORD_HELP
1506 "\n\t\t\t\tDefault: fp";
1508 static bool dry_run;
1511 * XXX Will stay a global variable till we fix builtin-script.c to stop messing
1512 * with it and switch to use the library functions in perf_evlist that came
1513 * from builtin-record.c, i.e. use record_opts,
1514 * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
1517 static struct option __record_options[] = {
1518 OPT_CALLBACK('e', "event", &record.evlist, "event",
1519 "event selector. use 'perf list' to list available events",
1520 parse_events_option),
1521 OPT_CALLBACK(0, "filter", &record.evlist, "filter",
1522 "event filter", parse_filter),
1523 OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist,
1524 NULL, "don't record events from perf itself",
1526 OPT_STRING('p', "pid", &record.opts.target.pid, "pid",
1527 "record events on existing process id"),
1528 OPT_STRING('t', "tid", &record.opts.target.tid, "tid",
1529 "record events on existing thread id"),
1530 OPT_INTEGER('r', "realtime", &record.realtime_prio,
1531 "collect data with this RT SCHED_FIFO priority"),
1532 OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering,
1533 "collect data without buffering"),
1534 OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples,
1535 "collect raw sample records from all opened counters"),
1536 OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide,
1537 "system-wide collection from all CPUs"),
1538 OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
1539 "list of cpus to monitor"),
1540 OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
1541 OPT_STRING('o', "output", &record.file.path, "file",
1542 "output file name"),
1543 OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
1544 &record.opts.no_inherit_set,
1545 "child tasks do not inherit counters"),
1546 OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize,
1547 "synthesize non-sample events at the end of output"),
1548 OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"),
1549 OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"),
1550 OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]",
1551 "number of mmap data pages and AUX area tracing mmap pages",
1552 record__parse_mmap_pages),
1553 OPT_BOOLEAN(0, "group", &record.opts.group,
1554 "put the counters into a counter group"),
1555 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1556 NULL, "enables call-graph recording" ,
1557 &record_callchain_opt),
1558 OPT_CALLBACK(0, "call-graph", &record.opts,
1559 "record_mode[,record_size]", record_callchain_help,
1560 &record_parse_callchain_opt),
1561 OPT_INCR('v', "verbose", &verbose,
1562 "be more verbose (show counter open errors, etc)"),
1563 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
1564 OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
1565 "per thread counts"),
1566 OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"),
1567 OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"),
1568 OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
1569 &record.opts.sample_time_set,
1570 "Record the sample timestamps"),
1571 OPT_BOOLEAN('P', "period", &record.opts.period, "Record the sample period"),
1572 OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
1574 OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache,
1575 &record.no_buildid_cache_set,
1576 "do not update the buildid cache"),
1577 OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid,
1578 &record.no_buildid_set,
1579 "do not collect buildids in perf.data"),
1580 OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
1581 "monitor event in cgroup name only",
1583 OPT_UINTEGER('D', "delay", &record.opts.initial_delay,
1584 "ms to wait before starting measurement after program start"),
1585 OPT_STRING('u', "uid", &record.opts.target.uid_str, "user",
1588 OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack,
1589 "branch any", "sample any taken branches",
1590 parse_branch_stack),
1592 OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
1593 "branch filter mask", "branch stack filter modes",
1594 parse_branch_stack),
1595 OPT_BOOLEAN('W', "weight", &record.opts.sample_weight,
1596 "sample by weight (on special events only)"),
1597 OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction,
1598 "sample transaction flags (special events only)"),
1599 OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread,
1600 "use per-thread mmaps"),
1601 OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register",
1602 "sample selected machine registers on interrupt,"
1603 " use -I ? to list register names", parse_regs),
1604 OPT_BOOLEAN(0, "running-time", &record.opts.running_time,
1605 "Record running/enabled time of read (:S) events"),
1606 OPT_CALLBACK('k', "clockid", &record.opts,
1607 "clockid", "clockid to use for events, see clock_gettime()",
1609 OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts,
1610 "opts", "AUX area tracing Snapshot Mode", ""),
1611 OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout,
1612 "per thread proc mmap processing timeout in ms"),
1613 OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events,
1614 "Record context switch events"),
1615 OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel,
1616 "Configure all used events to run in kernel space.",
1617 PARSE_OPT_EXCLUSIVE),
1618 OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user,
1619 "Configure all used events to run in user space.",
1620 PARSE_OPT_EXCLUSIVE),
1621 OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path",
1622 "clang binary to use for compiling BPF scriptlets"),
1623 OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options",
1624 "options passed to clang when compiling BPF scriptlets"),
1625 OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name,
1626 "file", "vmlinux pathname"),
1627 OPT_BOOLEAN(0, "buildid-all", &record.buildid_all,
1628 "Record build-id of all DSOs regardless of hits"),
1629 OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename,
1630 "append timestamp to output filename"),
1631 OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str,
1632 &record.switch_output.set, "signal,size,time",
1633 "Switch output when receive SIGUSR2 or cross size,time threshold",
1635 OPT_BOOLEAN(0, "dry-run", &dry_run,
1636 "Parse options then exit"),
1640 struct option *record_options = __record_options;
1642 int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
1645 struct record *rec = &record;
1646 char errbuf[BUFSIZ];
1648 #ifndef HAVE_LIBBPF_SUPPORT
1649 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c)
1650 set_nobuild('\0', "clang-path", true);
1651 set_nobuild('\0', "clang-opt", true);
1655 #ifndef HAVE_BPF_PROLOGUE
1656 # if !defined (HAVE_DWARF_SUPPORT)
1657 # define REASON "NO_DWARF=1"
1658 # elif !defined (HAVE_LIBBPF_SUPPORT)
1659 # define REASON "NO_LIBBPF=1"
1661 # define REASON "this architecture doesn't support BPF prologue"
1663 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c)
1664 set_nobuild('\0', "vmlinux", true);
1669 rec->evlist = perf_evlist__new();
1670 if (rec->evlist == NULL)
1673 err = perf_config(perf_record_config, rec);
1677 argc = parse_options(argc, argv, record_options, record_usage,
1678 PARSE_OPT_STOP_AT_NON_OPTION);
1679 if (!argc && target__none(&rec->opts.target))
1680 usage_with_options(record_usage, record_options);
1682 if (nr_cgroups && !rec->opts.target.system_wide) {
1683 usage_with_options_msg(record_usage, record_options,
1684 "cgroup monitoring only available in system-wide mode");
1687 if (rec->opts.record_switch_events &&
1688 !perf_can_record_switch_events()) {
1689 ui__error("kernel does not support recording context switch events\n");
1690 parse_options_usage(record_usage, record_options, "switch-events", 0);
1694 if (switch_output_setup(rec)) {
1695 parse_options_usage(record_usage, record_options, "switch-output", 0);
1699 if (rec->switch_output.time) {
1700 signal(SIGALRM, alarm_sig_handler);
1701 alarm(rec->switch_output.time);
1705 rec->itr = auxtrace_record__init(rec->evlist, &err);
1710 err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts,
1711 rec->opts.auxtrace_snapshot_opts);
1716 * Allow aliases to facilitate the lookup of symbols for address
1717 * filters. Refer to auxtrace_parse_filters().
1719 symbol_conf.allow_aliases = true;
1723 err = auxtrace_parse_filters(rec->evlist);
1730 err = bpf__setup_stdout(rec->evlist);
1732 bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf));
1733 pr_err("ERROR: Setup BPF stdout failed: %s\n",
1740 if (symbol_conf.kptr_restrict)
1742 "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
1743 "check /proc/sys/kernel/kptr_restrict.\n\n"
1744 "Samples in kernel functions may not be resolved if a suitable vmlinux\n"
1745 "file is not found in the buildid cache or in the vmlinux path.\n\n"
1746 "Samples in kernel modules won't be resolved at all.\n\n"
1747 "If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
1748 "even with a suitable vmlinux or kallsyms file.\n\n");
1750 if (rec->no_buildid_cache || rec->no_buildid) {
1751 disable_buildid_cache();
1752 } else if (rec->switch_output.enabled) {
1754 * In 'perf record --switch-output', disable buildid
1755 * generation by default to reduce data file switching
1756 * overhead. Still generate buildid if they are required
1759 * perf record --switch-output --no-no-buildid \
1760 * --no-no-buildid-cache
1762 * Following code equals to:
1764 * if ((rec->no_buildid || !rec->no_buildid_set) &&
1765 * (rec->no_buildid_cache || !rec->no_buildid_cache_set))
1766 * disable_buildid_cache();
1768 bool disable = true;
1770 if (rec->no_buildid_set && !rec->no_buildid)
1772 if (rec->no_buildid_cache_set && !rec->no_buildid_cache)
1775 rec->no_buildid = true;
1776 rec->no_buildid_cache = true;
1777 disable_buildid_cache();
1781 if (record.opts.overwrite)
1782 record.opts.tail_synthesize = true;
1784 if (rec->evlist->nr_entries == 0 &&
1785 perf_evlist__add_default(rec->evlist) < 0) {
1786 pr_err("Not enough memory for event selector list\n");
1790 if (rec->opts.target.tid && !rec->opts.no_inherit_set)
1791 rec->opts.no_inherit = true;
1793 err = target__validate(&rec->opts.target);
1795 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1796 ui__warning("%s", errbuf);
1799 err = target__parse_uid(&rec->opts.target);
1801 int saved_errno = errno;
1803 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1804 ui__error("%s", errbuf);
1810 /* Enable ignoring missing threads when -u option is defined. */
1811 rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX;
1814 if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0)
1815 usage_with_options(record_usage, record_options);
1817 err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts);
1822 * We take all buildids when the file contains
1823 * AUX area tracing data because we do not decode the
1824 * trace because it would take too long.
1826 if (rec->opts.full_auxtrace)
1827 rec->buildid_all = true;
1829 if (record_opts__config(&rec->opts)) {
1834 err = __cmd_record(&record, argc, argv);
1836 perf_evlist__delete(rec->evlist);
1838 auxtrace_record__free(rec->itr);
1842 static void snapshot_sig_handler(int sig __maybe_unused)
1844 struct record *rec = &record;
1846 if (trigger_is_ready(&auxtrace_snapshot_trigger)) {
1847 trigger_hit(&auxtrace_snapshot_trigger);
1848 auxtrace_record__snapshot_started = 1;
1849 if (auxtrace_record__snapshot_start(record.itr))
1850 trigger_error(&auxtrace_snapshot_trigger);
1853 if (switch_output_signal(rec))
1854 trigger_hit(&switch_output_trigger);
1857 static void alarm_sig_handler(int sig __maybe_unused)
1859 struct record *rec = &record;
1861 if (switch_output_time(rec))
1862 trigger_hit(&switch_output_trigger);