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