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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * builtin-inject.c
4 *
5 * Builtin inject command: Examine the live mode (stdin) event stream
6 * and repipe it to stdout while optionally injecting additional
7 * events into it.
8 */
9#include "builtin.h"
10
11#include "perf.h"
12#include "util/color.h"
13#include "util/evlist.h"
14#include "util/evsel.h"
15#include "util/session.h"
16#include "util/tool.h"
17#include "util/debug.h"
18#include "util/build-id.h"
19#include "util/data.h"
20#include "util/auxtrace.h"
21#include "util/jit.h"
22#include "util/thread.h"
23
24#include <subcmd/parse-options.h>
25
26#include <linux/list.h>
27#include <errno.h>
28#include <signal.h>
29
30struct perf_inject {
31 struct perf_tool tool;
32 struct perf_session *session;
33 bool build_ids;
34 bool sched_stat;
35 bool have_auxtrace;
36 bool strip;
37 bool jit_mode;
38 const char *input_name;
39 struct perf_data output;
40 u64 bytes_written;
41 u64 aux_id;
42 struct list_head samples;
43 struct itrace_synth_opts itrace_synth_opts;
44};
45
46struct event_entry {
47 struct list_head node;
48 u32 tid;
49 union perf_event event[0];
50};
51
52static int output_bytes(struct perf_inject *inject, void *buf, size_t sz)
53{
54 ssize_t size;
55
56 size = perf_data__write(&inject->output, buf, sz);
57 if (size < 0)
58 return -errno;
59
60 inject->bytes_written += size;
61 return 0;
62}
63
64static int perf_event__repipe_synth(struct perf_tool *tool,
65 union perf_event *event)
66{
67 struct perf_inject *inject = container_of(tool, struct perf_inject,
68 tool);
69
70 return output_bytes(inject, event, event->header.size);
71}
72
73static int perf_event__repipe_oe_synth(struct perf_tool *tool,
74 union perf_event *event,
75 struct ordered_events *oe __maybe_unused)
76{
77 return perf_event__repipe_synth(tool, event);
78}
79
80#ifdef HAVE_JITDUMP
81static int perf_event__drop_oe(struct perf_tool *tool __maybe_unused,
82 union perf_event *event __maybe_unused,
83 struct ordered_events *oe __maybe_unused)
84{
85 return 0;
86}
87#endif
88
89static int perf_event__repipe_op2_synth(struct perf_tool *tool,
90 union perf_event *event,
91 struct perf_session *session
92 __maybe_unused)
93{
94 return perf_event__repipe_synth(tool, event);
95}
96
97static int perf_event__repipe_attr(struct perf_tool *tool,
98 union perf_event *event,
99 struct perf_evlist **pevlist)
100{
101 struct perf_inject *inject = container_of(tool, struct perf_inject,
102 tool);
103 int ret;
104
105 ret = perf_event__process_attr(tool, event, pevlist);
106 if (ret)
107 return ret;
108
109 if (!inject->output.is_pipe)
110 return 0;
111
112 return perf_event__repipe_synth(tool, event);
113}
114
115#ifdef HAVE_AUXTRACE_SUPPORT
116
117static int copy_bytes(struct perf_inject *inject, int fd, off_t size)
118{
119 char buf[4096];
120 ssize_t ssz;
121 int ret;
122
123 while (size > 0) {
124 ssz = read(fd, buf, min(size, (off_t)sizeof(buf)));
125 if (ssz < 0)
126 return -errno;
127 ret = output_bytes(inject, buf, ssz);
128 if (ret)
129 return ret;
130 size -= ssz;
131 }
132
133 return 0;
134}
135
136static s64 perf_event__repipe_auxtrace(struct perf_tool *tool,
137 union perf_event *event,
138 struct perf_session *session)
139{
140 struct perf_inject *inject = container_of(tool, struct perf_inject,
141 tool);
142 int ret;
143
144 inject->have_auxtrace = true;
145
146 if (!inject->output.is_pipe) {
147 off_t offset;
148
149 offset = lseek(inject->output.file.fd, 0, SEEK_CUR);
150 if (offset == -1)
151 return -errno;
152 ret = auxtrace_index__auxtrace_event(&session->auxtrace_index,
153 event, offset);
154 if (ret < 0)
155 return ret;
156 }
157
158 if (perf_data__is_pipe(session->data) || !session->one_mmap) {
159 ret = output_bytes(inject, event, event->header.size);
160 if (ret < 0)
161 return ret;
162 ret = copy_bytes(inject, perf_data__fd(session->data),
163 event->auxtrace.size);
164 } else {
165 ret = output_bytes(inject, event,
166 event->header.size + event->auxtrace.size);
167 }
168 if (ret < 0)
169 return ret;
170
171 return event->auxtrace.size;
172}
173
174#else
175
176static s64
177perf_event__repipe_auxtrace(struct perf_tool *tool __maybe_unused,
178 union perf_event *event __maybe_unused,
179 struct perf_session *session __maybe_unused)
180{
181 pr_err("AUX area tracing not supported\n");
182 return -EINVAL;
183}
184
185#endif
186
187static int perf_event__repipe(struct perf_tool *tool,
188 union perf_event *event,
189 struct perf_sample *sample __maybe_unused,
190 struct machine *machine __maybe_unused)
191{
192 return perf_event__repipe_synth(tool, event);
193}
194
195static int perf_event__drop(struct perf_tool *tool __maybe_unused,
196 union perf_event *event __maybe_unused,
197 struct perf_sample *sample __maybe_unused,
198 struct machine *machine __maybe_unused)
199{
200 return 0;
201}
202
203static int perf_event__drop_aux(struct perf_tool *tool,
204 union perf_event *event __maybe_unused,
205 struct perf_sample *sample,
206 struct machine *machine __maybe_unused)
207{
208 struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
209
210 if (!inject->aux_id)
211 inject->aux_id = sample->id;
212
213 return 0;
214}
215
216typedef int (*inject_handler)(struct perf_tool *tool,
217 union perf_event *event,
218 struct perf_sample *sample,
219 struct perf_evsel *evsel,
220 struct machine *machine);
221
222static int perf_event__repipe_sample(struct perf_tool *tool,
223 union perf_event *event,
224 struct perf_sample *sample,
225 struct perf_evsel *evsel,
226 struct machine *machine)
227{
228 if (evsel->handler) {
229 inject_handler f = evsel->handler;
230 return f(tool, event, sample, evsel, machine);
231 }
232
233 build_id__mark_dso_hit(tool, event, sample, evsel, machine);
234
235 return perf_event__repipe_synth(tool, event);
236}
237
238static int perf_event__repipe_mmap(struct perf_tool *tool,
239 union perf_event *event,
240 struct perf_sample *sample,
241 struct machine *machine)
242{
243 int err;
244
245 err = perf_event__process_mmap(tool, event, sample, machine);
246 perf_event__repipe(tool, event, sample, machine);
247
248 return err;
249}
250
251#ifdef HAVE_JITDUMP
252static int perf_event__jit_repipe_mmap(struct perf_tool *tool,
253 union perf_event *event,
254 struct perf_sample *sample,
255 struct machine *machine)
256{
257 struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
258 u64 n = 0;
259 int ret;
260
261 /*
262 * if jit marker, then inject jit mmaps and generate ELF images
263 */
264 ret = jit_process(inject->session, &inject->output, machine,
265 event->mmap.filename, sample->pid, &n);
266 if (ret < 0)
267 return ret;
268 if (ret) {
269 inject->bytes_written += n;
270 return 0;
271 }
272 return perf_event__repipe_mmap(tool, event, sample, machine);
273}
274#endif
275
276static int perf_event__repipe_mmap2(struct perf_tool *tool,
277 union perf_event *event,
278 struct perf_sample *sample,
279 struct machine *machine)
280{
281 int err;
282
283 err = perf_event__process_mmap2(tool, event, sample, machine);
284 perf_event__repipe(tool, event, sample, machine);
285
286 return err;
287}
288
289#ifdef HAVE_JITDUMP
290static int perf_event__jit_repipe_mmap2(struct perf_tool *tool,
291 union perf_event *event,
292 struct perf_sample *sample,
293 struct machine *machine)
294{
295 struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
296 u64 n = 0;
297 int ret;
298
299 /*
300 * if jit marker, then inject jit mmaps and generate ELF images
301 */
302 ret = jit_process(inject->session, &inject->output, machine,
303 event->mmap2.filename, sample->pid, &n);
304 if (ret < 0)
305 return ret;
306 if (ret) {
307 inject->bytes_written += n;
308 return 0;
309 }
310 return perf_event__repipe_mmap2(tool, event, sample, machine);
311}
312#endif
313
314static int perf_event__repipe_fork(struct perf_tool *tool,
315 union perf_event *event,
316 struct perf_sample *sample,
317 struct machine *machine)
318{
319 int err;
320
321 err = perf_event__process_fork(tool, event, sample, machine);
322 perf_event__repipe(tool, event, sample, machine);
323
324 return err;
325}
326
327static int perf_event__repipe_comm(struct perf_tool *tool,
328 union perf_event *event,
329 struct perf_sample *sample,
330 struct machine *machine)
331{
332 int err;
333
334 err = perf_event__process_comm(tool, event, sample, machine);
335 perf_event__repipe(tool, event, sample, machine);
336
337 return err;
338}
339
340static int perf_event__repipe_namespaces(struct perf_tool *tool,
341 union perf_event *event,
342 struct perf_sample *sample,
343 struct machine *machine)
344{
345 int err = perf_event__process_namespaces(tool, event, sample, machine);
346
347 perf_event__repipe(tool, event, sample, machine);
348
349 return err;
350}
351
352static int perf_event__repipe_exit(struct perf_tool *tool,
353 union perf_event *event,
354 struct perf_sample *sample,
355 struct machine *machine)
356{
357 int err;
358
359 err = perf_event__process_exit(tool, event, sample, machine);
360 perf_event__repipe(tool, event, sample, machine);
361
362 return err;
363}
364
365static int perf_event__repipe_tracing_data(struct perf_tool *tool,
366 union perf_event *event,
367 struct perf_session *session)
368{
369 int err;
370
371 perf_event__repipe_synth(tool, event);
372 err = perf_event__process_tracing_data(tool, event, session);
373
374 return err;
375}
376
377static int perf_event__repipe_id_index(struct perf_tool *tool,
378 union perf_event *event,
379 struct perf_session *session)
380{
381 int err;
382
383 perf_event__repipe_synth(tool, event);
384 err = perf_event__process_id_index(tool, event, session);
385
386 return err;
387}
388
389static int dso__read_build_id(struct dso *dso)
390{
391 if (dso->has_build_id)
392 return 0;
393
394 if (filename__read_build_id(dso->long_name, dso->build_id,
395 sizeof(dso->build_id)) > 0) {
396 dso->has_build_id = true;
397 return 0;
398 }
399
400 return -1;
401}
402
403static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
404 struct machine *machine)
405{
406 u16 misc = PERF_RECORD_MISC_USER;
407 int err;
408
409 if (dso__read_build_id(dso) < 0) {
410 pr_debug("no build_id found for %s\n", dso->long_name);
411 return -1;
412 }
413
414 if (dso->kernel)
415 misc = PERF_RECORD_MISC_KERNEL;
416
417 err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
418 machine);
419 if (err) {
420 pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
421 return -1;
422 }
423
424 return 0;
425}
426
427static int perf_event__inject_buildid(struct perf_tool *tool,
428 union perf_event *event,
429 struct perf_sample *sample,
430 struct perf_evsel *evsel __maybe_unused,
431 struct machine *machine)
432{
433 struct addr_location al;
434 struct thread *thread;
435
436 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
437 if (thread == NULL) {
438 pr_err("problem processing %d event, skipping it.\n",
439 event->header.type);
440 goto repipe;
441 }
442
443 thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, &al);
444
445 if (al.map != NULL) {
446 if (!al.map->dso->hit) {
447 al.map->dso->hit = 1;
448 if (map__load(al.map) >= 0) {
449 dso__inject_build_id(al.map->dso, tool, machine);
450 /*
451 * If this fails, too bad, let the other side
452 * account this as unresolved.
453 */
454 } else {
455#ifdef HAVE_LIBELF_SUPPORT
456 pr_warning("no symbols found in %s, maybe "
457 "install a debug package?\n",
458 al.map->dso->long_name);
459#endif
460 }
461 }
462 }
463
464 thread__put(thread);
465repipe:
466 perf_event__repipe(tool, event, sample, machine);
467 return 0;
468}
469
470static int perf_inject__sched_process_exit(struct perf_tool *tool,
471 union perf_event *event __maybe_unused,
472 struct perf_sample *sample,
473 struct perf_evsel *evsel __maybe_unused,
474 struct machine *machine __maybe_unused)
475{
476 struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
477 struct event_entry *ent;
478
479 list_for_each_entry(ent, &inject->samples, node) {
480 if (sample->tid == ent->tid) {
481 list_del_init(&ent->node);
482 free(ent);
483 break;
484 }
485 }
486
487 return 0;
488}
489
490static int perf_inject__sched_switch(struct perf_tool *tool,
491 union perf_event *event,
492 struct perf_sample *sample,
493 struct perf_evsel *evsel,
494 struct machine *machine)
495{
496 struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
497 struct event_entry *ent;
498
499 perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
500
501 ent = malloc(event->header.size + sizeof(struct event_entry));
502 if (ent == NULL) {
503 color_fprintf(stderr, PERF_COLOR_RED,
504 "Not enough memory to process sched switch event!");
505 return -1;
506 }
507
508 ent->tid = sample->tid;
509 memcpy(&ent->event, event, event->header.size);
510 list_add(&ent->node, &inject->samples);
511 return 0;
512}
513
514static int perf_inject__sched_stat(struct perf_tool *tool,
515 union perf_event *event __maybe_unused,
516 struct perf_sample *sample,
517 struct perf_evsel *evsel,
518 struct machine *machine)
519{
520 struct event_entry *ent;
521 union perf_event *event_sw;
522 struct perf_sample sample_sw;
523 struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
524 u32 pid = perf_evsel__intval(evsel, sample, "pid");
525
526 list_for_each_entry(ent, &inject->samples, node) {
527 if (pid == ent->tid)
528 goto found;
529 }
530
531 return 0;
532found:
533 event_sw = &ent->event[0];
534 perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
535
536 sample_sw.period = sample->period;
537 sample_sw.time = sample->time;
538 perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
539 evsel->attr.read_format, &sample_sw);
540 build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
541 return perf_event__repipe(tool, event_sw, &sample_sw, machine);
542}
543
544static void sig_handler(int sig __maybe_unused)
545{
546 session_done = 1;
547}
548
549static int perf_evsel__check_stype(struct perf_evsel *evsel,
550 u64 sample_type, const char *sample_msg)
551{
552 struct perf_event_attr *attr = &evsel->attr;
553 const char *name = perf_evsel__name(evsel);
554
555 if (!(attr->sample_type & sample_type)) {
556 pr_err("Samples for %s event do not have %s attribute set.",
557 name, sample_msg);
558 return -EINVAL;
559 }
560
561 return 0;
562}
563
564static int drop_sample(struct perf_tool *tool __maybe_unused,
565 union perf_event *event __maybe_unused,
566 struct perf_sample *sample __maybe_unused,
567 struct perf_evsel *evsel __maybe_unused,
568 struct machine *machine __maybe_unused)
569{
570 return 0;
571}
572
573static void strip_init(struct perf_inject *inject)
574{
575 struct perf_evlist *evlist = inject->session->evlist;
576 struct perf_evsel *evsel;
577
578 inject->tool.context_switch = perf_event__drop;
579
580 evlist__for_each_entry(evlist, evsel)
581 evsel->handler = drop_sample;
582}
583
584static bool has_tracking(struct perf_evsel *evsel)
585{
586 return evsel->attr.mmap || evsel->attr.mmap2 || evsel->attr.comm ||
587 evsel->attr.task;
588}
589
590#define COMPAT_MASK (PERF_SAMPLE_ID | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | \
591 PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_IDENTIFIER)
592
593/*
594 * In order that the perf.data file is parsable, tracking events like MMAP need
595 * their selected event to exist, except if there is only 1 selected event left
596 * and it has a compatible sample type.
597 */
598static bool ok_to_remove(struct perf_evlist *evlist,
599 struct perf_evsel *evsel_to_remove)
600{
601 struct perf_evsel *evsel;
602 int cnt = 0;
603 bool ok = false;
604
605 if (!has_tracking(evsel_to_remove))
606 return true;
607
608 evlist__for_each_entry(evlist, evsel) {
609 if (evsel->handler != drop_sample) {
610 cnt += 1;
611 if ((evsel->attr.sample_type & COMPAT_MASK) ==
612 (evsel_to_remove->attr.sample_type & COMPAT_MASK))
613 ok = true;
614 }
615 }
616
617 return ok && cnt == 1;
618}
619
620static void strip_fini(struct perf_inject *inject)
621{
622 struct perf_evlist *evlist = inject->session->evlist;
623 struct perf_evsel *evsel, *tmp;
624
625 /* Remove non-synthesized evsels if possible */
626 evlist__for_each_entry_safe(evlist, tmp, evsel) {
627 if (evsel->handler == drop_sample &&
628 ok_to_remove(evlist, evsel)) {
629 pr_debug("Deleting %s\n", perf_evsel__name(evsel));
630 perf_evlist__remove(evlist, evsel);
631 perf_evsel__delete(evsel);
632 }
633 }
634}
635
636static int __cmd_inject(struct perf_inject *inject)
637{
638 int ret = -EINVAL;
639 struct perf_session *session = inject->session;
640 struct perf_data *data_out = &inject->output;
641 int fd = perf_data__fd(data_out);
642 u64 output_data_offset;
643
644 signal(SIGINT, sig_handler);
645
646 if (inject->build_ids || inject->sched_stat ||
647 inject->itrace_synth_opts.set) {
648 inject->tool.mmap = perf_event__repipe_mmap;
649 inject->tool.mmap2 = perf_event__repipe_mmap2;
650 inject->tool.fork = perf_event__repipe_fork;
651 inject->tool.tracing_data = perf_event__repipe_tracing_data;
652 }
653
654 output_data_offset = session->header.data_offset;
655
656 if (inject->build_ids) {
657 inject->tool.sample = perf_event__inject_buildid;
658 } else if (inject->sched_stat) {
659 struct perf_evsel *evsel;
660
661 evlist__for_each_entry(session->evlist, evsel) {
662 const char *name = perf_evsel__name(evsel);
663
664 if (!strcmp(name, "sched:sched_switch")) {
665 if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
666 return -EINVAL;
667
668 evsel->handler = perf_inject__sched_switch;
669 } else if (!strcmp(name, "sched:sched_process_exit"))
670 evsel->handler = perf_inject__sched_process_exit;
671 else if (!strncmp(name, "sched:sched_stat_", 17))
672 evsel->handler = perf_inject__sched_stat;
673 }
674 } else if (inject->itrace_synth_opts.set) {
675 session->itrace_synth_opts = &inject->itrace_synth_opts;
676 inject->itrace_synth_opts.inject = true;
677 inject->tool.comm = perf_event__repipe_comm;
678 inject->tool.namespaces = perf_event__repipe_namespaces;
679 inject->tool.exit = perf_event__repipe_exit;
680 inject->tool.id_index = perf_event__repipe_id_index;
681 inject->tool.auxtrace_info = perf_event__process_auxtrace_info;
682 inject->tool.auxtrace = perf_event__process_auxtrace;
683 inject->tool.aux = perf_event__drop_aux;
684 inject->tool.itrace_start = perf_event__drop_aux,
685 inject->tool.ordered_events = true;
686 inject->tool.ordering_requires_timestamps = true;
687 /* Allow space in the header for new attributes */
688 output_data_offset = 4096;
689 if (inject->strip)
690 strip_init(inject);
691 }
692
693 if (!inject->itrace_synth_opts.set)
694 auxtrace_index__free(&session->auxtrace_index);
695
696 if (!data_out->is_pipe)
697 lseek(fd, output_data_offset, SEEK_SET);
698
699 ret = perf_session__process_events(session);
700 if (ret)
701 return ret;
702
703 if (!data_out->is_pipe) {
704 if (inject->build_ids)
705 perf_header__set_feat(&session->header,
706 HEADER_BUILD_ID);
707 /*
708 * Keep all buildids when there is unprocessed AUX data because
709 * it is not known which ones the AUX trace hits.
710 */
711 if (perf_header__has_feat(&session->header, HEADER_BUILD_ID) &&
712 inject->have_auxtrace && !inject->itrace_synth_opts.set)
713 dsos__hit_all(session);
714 /*
715 * The AUX areas have been removed and replaced with
716 * synthesized hardware events, so clear the feature flag and
717 * remove the evsel.
718 */
719 if (inject->itrace_synth_opts.set) {
720 struct perf_evsel *evsel;
721
722 perf_header__clear_feat(&session->header,
723 HEADER_AUXTRACE);
724 if (inject->itrace_synth_opts.last_branch)
725 perf_header__set_feat(&session->header,
726 HEADER_BRANCH_STACK);
727 evsel = perf_evlist__id2evsel_strict(session->evlist,
728 inject->aux_id);
729 if (evsel) {
730 pr_debug("Deleting %s\n",
731 perf_evsel__name(evsel));
732 perf_evlist__remove(session->evlist, evsel);
733 perf_evsel__delete(evsel);
734 }
735 if (inject->strip)
736 strip_fini(inject);
737 }
738 session->header.data_offset = output_data_offset;
739 session->header.data_size = inject->bytes_written;
740 perf_session__write_header(session, session->evlist, fd, true);
741 }
742
743 return ret;
744}
745
746int cmd_inject(int argc, const char **argv)
747{
748 struct perf_inject inject = {
749 .tool = {
750 .sample = perf_event__repipe_sample,
751 .mmap = perf_event__repipe,
752 .mmap2 = perf_event__repipe,
753 .comm = perf_event__repipe,
754 .fork = perf_event__repipe,
755 .exit = perf_event__repipe,
756 .lost = perf_event__repipe,
757 .lost_samples = perf_event__repipe,
758 .aux = perf_event__repipe,
759 .itrace_start = perf_event__repipe,
760 .context_switch = perf_event__repipe,
761 .read = perf_event__repipe_sample,
762 .throttle = perf_event__repipe,
763 .unthrottle = perf_event__repipe,
764 .attr = perf_event__repipe_attr,
765 .tracing_data = perf_event__repipe_op2_synth,
766 .auxtrace_info = perf_event__repipe_op2_synth,
767 .auxtrace = perf_event__repipe_auxtrace,
768 .auxtrace_error = perf_event__repipe_op2_synth,
769 .time_conv = perf_event__repipe_op2_synth,
770 .finished_round = perf_event__repipe_oe_synth,
771 .build_id = perf_event__repipe_op2_synth,
772 .id_index = perf_event__repipe_op2_synth,
773 .feature = perf_event__repipe_op2_synth,
774 },
775 .input_name = "-",
776 .samples = LIST_HEAD_INIT(inject.samples),
777 .output = {
778 .file = {
779 .path = "-",
780 },
781 .mode = PERF_DATA_MODE_WRITE,
782 },
783 };
784 struct perf_data data = {
785 .mode = PERF_DATA_MODE_READ,
786 };
787 int ret;
788
789 struct option options[] = {
790 OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
791 "Inject build-ids into the output stream"),
792 OPT_STRING('i', "input", &inject.input_name, "file",
793 "input file name"),
794 OPT_STRING('o', "output", &inject.output.file.path, "file",
795 "output file name"),
796 OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
797 "Merge sched-stat and sched-switch for getting events "
798 "where and how long tasks slept"),
799#ifdef HAVE_JITDUMP
800 OPT_BOOLEAN('j', "jit", &inject.jit_mode, "merge jitdump files into perf.data file"),
801#endif
802 OPT_INCR('v', "verbose", &verbose,
803 "be more verbose (show build ids, etc)"),
804 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
805 "kallsyms pathname"),
806 OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
807 OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts,
808 NULL, "opts", "Instruction Tracing options",
809 itrace_parse_synth_opts),
810 OPT_BOOLEAN(0, "strip", &inject.strip,
811 "strip non-synthesized events (use with --itrace)"),
812 OPT_END()
813 };
814 const char * const inject_usage[] = {
815 "perf inject [<options>]",
816 NULL
817 };
818#ifndef HAVE_JITDUMP
819 set_option_nobuild(options, 'j', "jit", "NO_LIBELF=1", true);
820#endif
821 argc = parse_options(argc, argv, options, inject_usage, 0);
822
823 /*
824 * Any (unrecognized) arguments left?
825 */
826 if (argc)
827 usage_with_options(inject_usage, options);
828
829 if (inject.strip && !inject.itrace_synth_opts.set) {
830 pr_err("--strip option requires --itrace option\n");
831 return -1;
832 }
833
834 if (perf_data__open(&inject.output)) {
835 perror("failed to create output file");
836 return -1;
837 }
838
839 inject.tool.ordered_events = inject.sched_stat;
840
841 data.file.path = inject.input_name;
842 inject.session = perf_session__new(&data, true, &inject.tool);
843 if (inject.session == NULL)
844 return -1;
845
846 if (inject.build_ids) {
847 /*
848 * to make sure the mmap records are ordered correctly
849 * and so that the correct especially due to jitted code
850 * mmaps. We cannot generate the buildid hit list and
851 * inject the jit mmaps at the same time for now.
852 */
853 inject.tool.ordered_events = true;
854 inject.tool.ordering_requires_timestamps = true;
855 }
856#ifdef HAVE_JITDUMP
857 if (inject.jit_mode) {
858 inject.tool.mmap2 = perf_event__jit_repipe_mmap2;
859 inject.tool.mmap = perf_event__jit_repipe_mmap;
860 inject.tool.ordered_events = true;
861 inject.tool.ordering_requires_timestamps = true;
862 /*
863 * JIT MMAP injection injects all MMAP events in one go, so it
864 * does not obey finished_round semantics.
865 */
866 inject.tool.finished_round = perf_event__drop_oe;
867 }
868#endif
869 ret = symbol__init(&inject.session->header.env);
870 if (ret < 0)
871 goto out_delete;
872
873 ret = __cmd_inject(&inject);
874
875out_delete:
876 perf_session__delete(inject.session);
877 return ret;
878}
1/*
2 * builtin-inject.c
3 *
4 * Builtin inject command: Examine the live mode (stdin) event stream
5 * and repipe it to stdout while optionally injecting additional
6 * events into it.
7 */
8#include "builtin.h"
9
10#include "perf.h"
11#include "util/session.h"
12#include "util/debug.h"
13
14#include "util/parse-options.h"
15
16static char const *input_name = "-";
17static bool inject_build_ids;
18
19static int perf_event__repipe_synth(union perf_event *event,
20 struct perf_session *session __used)
21{
22 uint32_t size;
23 void *buf = event;
24
25 size = event->header.size;
26
27 while (size) {
28 int ret = write(STDOUT_FILENO, buf, size);
29 if (ret < 0)
30 return -errno;
31
32 size -= ret;
33 buf += ret;
34 }
35
36 return 0;
37}
38
39static int perf_event__repipe(union perf_event *event,
40 struct perf_sample *sample __used,
41 struct perf_session *session)
42{
43 return perf_event__repipe_synth(event, session);
44}
45
46static int perf_event__repipe_sample(union perf_event *event,
47 struct perf_sample *sample __used,
48 struct perf_evsel *evsel __used,
49 struct perf_session *session)
50{
51 return perf_event__repipe_synth(event, session);
52}
53
54static int perf_event__repipe_mmap(union perf_event *event,
55 struct perf_sample *sample,
56 struct perf_session *session)
57{
58 int err;
59
60 err = perf_event__process_mmap(event, sample, session);
61 perf_event__repipe(event, sample, session);
62
63 return err;
64}
65
66static int perf_event__repipe_task(union perf_event *event,
67 struct perf_sample *sample,
68 struct perf_session *session)
69{
70 int err;
71
72 err = perf_event__process_task(event, sample, session);
73 perf_event__repipe(event, sample, session);
74
75 return err;
76}
77
78static int perf_event__repipe_tracing_data(union perf_event *event,
79 struct perf_session *session)
80{
81 int err;
82
83 perf_event__repipe_synth(event, session);
84 err = perf_event__process_tracing_data(event, session);
85
86 return err;
87}
88
89static int dso__read_build_id(struct dso *self)
90{
91 if (self->has_build_id)
92 return 0;
93
94 if (filename__read_build_id(self->long_name, self->build_id,
95 sizeof(self->build_id)) > 0) {
96 self->has_build_id = true;
97 return 0;
98 }
99
100 return -1;
101}
102
103static int dso__inject_build_id(struct dso *self, struct perf_session *session)
104{
105 u16 misc = PERF_RECORD_MISC_USER;
106 struct machine *machine;
107 int err;
108
109 if (dso__read_build_id(self) < 0) {
110 pr_debug("no build_id found for %s\n", self->long_name);
111 return -1;
112 }
113
114 machine = perf_session__find_host_machine(session);
115 if (machine == NULL) {
116 pr_err("Can't find machine for session\n");
117 return -1;
118 }
119
120 if (self->kernel)
121 misc = PERF_RECORD_MISC_KERNEL;
122
123 err = perf_event__synthesize_build_id(self, misc, perf_event__repipe,
124 machine, session);
125 if (err) {
126 pr_err("Can't synthesize build_id event for %s\n", self->long_name);
127 return -1;
128 }
129
130 return 0;
131}
132
133static int perf_event__inject_buildid(union perf_event *event,
134 struct perf_sample *sample,
135 struct perf_evsel *evsel __used,
136 struct perf_session *session)
137{
138 struct addr_location al;
139 struct thread *thread;
140 u8 cpumode;
141
142 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
143
144 thread = perf_session__findnew(session, event->ip.pid);
145 if (thread == NULL) {
146 pr_err("problem processing %d event, skipping it.\n",
147 event->header.type);
148 goto repipe;
149 }
150
151 thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
152 event->ip.pid, event->ip.ip, &al);
153
154 if (al.map != NULL) {
155 if (!al.map->dso->hit) {
156 al.map->dso->hit = 1;
157 if (map__load(al.map, NULL) >= 0) {
158 dso__inject_build_id(al.map->dso, session);
159 /*
160 * If this fails, too bad, let the other side
161 * account this as unresolved.
162 */
163 } else
164 pr_warning("no symbols found in %s, maybe "
165 "install a debug package?\n",
166 al.map->dso->long_name);
167 }
168 }
169
170repipe:
171 perf_event__repipe(event, sample, session);
172 return 0;
173}
174
175struct perf_event_ops inject_ops = {
176 .sample = perf_event__repipe_sample,
177 .mmap = perf_event__repipe,
178 .comm = perf_event__repipe,
179 .fork = perf_event__repipe,
180 .exit = perf_event__repipe,
181 .lost = perf_event__repipe,
182 .read = perf_event__repipe,
183 .throttle = perf_event__repipe,
184 .unthrottle = perf_event__repipe,
185 .attr = perf_event__repipe_synth,
186 .event_type = perf_event__repipe_synth,
187 .tracing_data = perf_event__repipe_synth,
188 .build_id = perf_event__repipe_synth,
189};
190
191extern volatile int session_done;
192
193static void sig_handler(int sig __attribute__((__unused__)))
194{
195 session_done = 1;
196}
197
198static int __cmd_inject(void)
199{
200 struct perf_session *session;
201 int ret = -EINVAL;
202
203 signal(SIGINT, sig_handler);
204
205 if (inject_build_ids) {
206 inject_ops.sample = perf_event__inject_buildid;
207 inject_ops.mmap = perf_event__repipe_mmap;
208 inject_ops.fork = perf_event__repipe_task;
209 inject_ops.tracing_data = perf_event__repipe_tracing_data;
210 }
211
212 session = perf_session__new(input_name, O_RDONLY, false, true, &inject_ops);
213 if (session == NULL)
214 return -ENOMEM;
215
216 ret = perf_session__process_events(session, &inject_ops);
217
218 perf_session__delete(session);
219
220 return ret;
221}
222
223static const char * const report_usage[] = {
224 "perf inject [<options>]",
225 NULL
226};
227
228static const struct option options[] = {
229 OPT_BOOLEAN('b', "build-ids", &inject_build_ids,
230 "Inject build-ids into the output stream"),
231 OPT_INCR('v', "verbose", &verbose,
232 "be more verbose (show build ids, etc)"),
233 OPT_END()
234};
235
236int cmd_inject(int argc, const char **argv, const char *prefix __used)
237{
238 argc = parse_options(argc, argv, options, report_usage, 0);
239
240 /*
241 * Any (unrecognized) arguments left?
242 */
243 if (argc)
244 usage_with_options(report_usage, options);
245
246 if (symbol__init() < 0)
247 return -1;
248
249 return __cmd_inject();
250}