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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// 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}