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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}
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}