4 * Builtin inject command: Examine the live mode (stdin) event stream
5 * and repipe it to stdout while optionally injecting additional
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"
22 #include <subcmd/parse-options.h>
24 #include <linux/list.h>
27 struct perf_tool tool
;
28 struct perf_session
*session
;
34 const char *input_name
;
35 struct perf_data_file output
;
38 struct list_head samples
;
39 struct itrace_synth_opts itrace_synth_opts
;
43 struct list_head node
;
45 union perf_event event
[0];
48 static int output_bytes(struct perf_inject
*inject
, void *buf
, size_t sz
)
52 size
= perf_data_file__write(&inject
->output
, buf
, sz
);
56 inject
->bytes_written
+= size
;
60 static int perf_event__repipe_synth(struct perf_tool
*tool
,
61 union perf_event
*event
)
63 struct perf_inject
*inject
= container_of(tool
, struct perf_inject
,
66 return output_bytes(inject
, event
, event
->header
.size
);
69 static int perf_event__repipe_oe_synth(struct perf_tool
*tool
,
70 union perf_event
*event
,
71 struct ordered_events
*oe __maybe_unused
)
73 return perf_event__repipe_synth(tool
, event
);
77 static 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
)
85 static int perf_event__repipe_op2_synth(struct perf_tool
*tool
,
86 union perf_event
*event
,
87 struct perf_session
*session
90 return perf_event__repipe_synth(tool
, event
);
93 static int perf_event__repipe_attr(struct perf_tool
*tool
,
94 union perf_event
*event
,
95 struct perf_evlist
**pevlist
)
97 struct perf_inject
*inject
= container_of(tool
, struct perf_inject
,
101 ret
= perf_event__process_attr(tool
, event
, pevlist
);
105 if (!inject
->output
.is_pipe
)
108 return perf_event__repipe_synth(tool
, event
);
111 #ifdef HAVE_AUXTRACE_SUPPORT
113 static int copy_bytes(struct perf_inject
*inject
, int fd
, off_t size
)
120 ssz
= read(fd
, buf
, min(size
, (off_t
)sizeof(buf
)));
123 ret
= output_bytes(inject
, buf
, ssz
);
132 static s64
perf_event__repipe_auxtrace(struct perf_tool
*tool
,
133 union perf_event
*event
,
134 struct perf_session
*session
)
136 struct perf_inject
*inject
= container_of(tool
, struct perf_inject
,
140 inject
->have_auxtrace
= true;
142 if (!inject
->output
.is_pipe
) {
145 offset
= lseek(inject
->output
.fd
, 0, SEEK_CUR
);
148 ret
= auxtrace_index__auxtrace_event(&session
->auxtrace_index
,
154 if (perf_data_file__is_pipe(session
->file
) || !session
->one_mmap
) {
155 ret
= output_bytes(inject
, event
, event
->header
.size
);
158 ret
= copy_bytes(inject
, perf_data_file__fd(session
->file
),
159 event
->auxtrace
.size
);
161 ret
= output_bytes(inject
, event
,
162 event
->header
.size
+ event
->auxtrace
.size
);
167 return event
->auxtrace
.size
;
173 perf_event__repipe_auxtrace(struct perf_tool
*tool __maybe_unused
,
174 union perf_event
*event __maybe_unused
,
175 struct perf_session
*session __maybe_unused
)
177 pr_err("AUX area tracing not supported\n");
183 static 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
)
188 return perf_event__repipe_synth(tool
, event
);
191 static 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
)
199 static 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
)
204 struct perf_inject
*inject
= container_of(tool
, struct perf_inject
, tool
);
207 inject
->aux_id
= sample
->id
;
212 typedef 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
);
218 static 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
)
224 if (evsel
->handler
) {
225 inject_handler f
= evsel
->handler
;
226 return f(tool
, event
, sample
, evsel
, machine
);
229 build_id__mark_dso_hit(tool
, event
, sample
, evsel
, machine
);
231 return perf_event__repipe_synth(tool
, event
);
234 static int perf_event__repipe_mmap(struct perf_tool
*tool
,
235 union perf_event
*event
,
236 struct perf_sample
*sample
,
237 struct machine
*machine
)
241 err
= perf_event__process_mmap(tool
, event
, sample
, machine
);
242 perf_event__repipe(tool
, event
, sample
, machine
);
248 static int perf_event__jit_repipe_mmap(struct perf_tool
*tool
,
249 union perf_event
*event
,
250 struct perf_sample
*sample
,
251 struct machine
*machine
)
253 struct perf_inject
*inject
= container_of(tool
, struct perf_inject
, tool
);
258 * if jit marker, then inject jit mmaps and generate ELF images
260 ret
= jit_process(inject
->session
, &inject
->output
, machine
,
261 event
->mmap
.filename
, sample
->pid
, &n
);
265 inject
->bytes_written
+= n
;
268 return perf_event__repipe_mmap(tool
, event
, sample
, machine
);
272 static int perf_event__repipe_mmap2(struct perf_tool
*tool
,
273 union perf_event
*event
,
274 struct perf_sample
*sample
,
275 struct machine
*machine
)
279 err
= perf_event__process_mmap2(tool
, event
, sample
, machine
);
280 perf_event__repipe(tool
, event
, sample
, machine
);
286 static int perf_event__jit_repipe_mmap2(struct perf_tool
*tool
,
287 union perf_event
*event
,
288 struct perf_sample
*sample
,
289 struct machine
*machine
)
291 struct perf_inject
*inject
= container_of(tool
, struct perf_inject
, tool
);
296 * if jit marker, then inject jit mmaps and generate ELF images
298 ret
= jit_process(inject
->session
, &inject
->output
, machine
,
299 event
->mmap2
.filename
, sample
->pid
, &n
);
303 inject
->bytes_written
+= n
;
306 return perf_event__repipe_mmap2(tool
, event
, sample
, machine
);
310 static int perf_event__repipe_fork(struct perf_tool
*tool
,
311 union perf_event
*event
,
312 struct perf_sample
*sample
,
313 struct machine
*machine
)
317 err
= perf_event__process_fork(tool
, event
, sample
, machine
);
318 perf_event__repipe(tool
, event
, sample
, machine
);
323 static int perf_event__repipe_comm(struct perf_tool
*tool
,
324 union perf_event
*event
,
325 struct perf_sample
*sample
,
326 struct machine
*machine
)
330 err
= perf_event__process_comm(tool
, event
, sample
, machine
);
331 perf_event__repipe(tool
, event
, sample
, machine
);
336 static int perf_event__repipe_namespaces(struct perf_tool
*tool
,
337 union perf_event
*event
,
338 struct perf_sample
*sample
,
339 struct machine
*machine
)
341 int err
= perf_event__process_namespaces(tool
, event
, sample
, machine
);
343 perf_event__repipe(tool
, event
, sample
, machine
);
348 static int perf_event__repipe_exit(struct perf_tool
*tool
,
349 union perf_event
*event
,
350 struct perf_sample
*sample
,
351 struct machine
*machine
)
355 err
= perf_event__process_exit(tool
, event
, sample
, machine
);
356 perf_event__repipe(tool
, event
, sample
, machine
);
361 static int perf_event__repipe_tracing_data(struct perf_tool
*tool
,
362 union perf_event
*event
,
363 struct perf_session
*session
)
367 perf_event__repipe_synth(tool
, event
);
368 err
= perf_event__process_tracing_data(tool
, event
, session
);
373 static int perf_event__repipe_id_index(struct perf_tool
*tool
,
374 union perf_event
*event
,
375 struct perf_session
*session
)
379 perf_event__repipe_synth(tool
, event
);
380 err
= perf_event__process_id_index(tool
, event
, session
);
385 static int dso__read_build_id(struct dso
*dso
)
387 if (dso
->has_build_id
)
390 if (filename__read_build_id(dso
->long_name
, dso
->build_id
,
391 sizeof(dso
->build_id
)) > 0) {
392 dso
->has_build_id
= true;
399 static int dso__inject_build_id(struct dso
*dso
, struct perf_tool
*tool
,
400 struct machine
*machine
)
402 u16 misc
= PERF_RECORD_MISC_USER
;
405 if (dso__read_build_id(dso
) < 0) {
406 pr_debug("no build_id found for %s\n", dso
->long_name
);
411 misc
= PERF_RECORD_MISC_KERNEL
;
413 err
= perf_event__synthesize_build_id(tool
, dso
, misc
, perf_event__repipe
,
416 pr_err("Can't synthesize build_id event for %s\n", dso
->long_name
);
423 static int perf_event__inject_buildid(struct perf_tool
*tool
,
424 union perf_event
*event
,
425 struct perf_sample
*sample
,
426 struct perf_evsel
*evsel __maybe_unused
,
427 struct machine
*machine
)
429 struct addr_location al
;
430 struct thread
*thread
;
432 thread
= machine__findnew_thread(machine
, sample
->pid
, sample
->tid
);
433 if (thread
== NULL
) {
434 pr_err("problem processing %d event, skipping it.\n",
439 thread__find_addr_map(thread
, sample
->cpumode
, MAP__FUNCTION
, sample
->ip
, &al
);
441 if (al
.map
!= NULL
) {
442 if (!al
.map
->dso
->hit
) {
443 al
.map
->dso
->hit
= 1;
444 if (map__load(al
.map
) >= 0) {
445 dso__inject_build_id(al
.map
->dso
, tool
, machine
);
447 * If this fails, too bad, let the other side
448 * account this as unresolved.
451 #ifdef HAVE_LIBELF_SUPPORT
452 pr_warning("no symbols found in %s, maybe "
453 "install a debug package?\n",
454 al
.map
->dso
->long_name
);
462 perf_event__repipe(tool
, event
, sample
, machine
);
466 static int perf_inject__sched_process_exit(struct perf_tool
*tool
,
467 union perf_event
*event __maybe_unused
,
468 struct perf_sample
*sample
,
469 struct perf_evsel
*evsel __maybe_unused
,
470 struct machine
*machine __maybe_unused
)
472 struct perf_inject
*inject
= container_of(tool
, struct perf_inject
, tool
);
473 struct event_entry
*ent
;
475 list_for_each_entry(ent
, &inject
->samples
, node
) {
476 if (sample
->tid
== ent
->tid
) {
477 list_del_init(&ent
->node
);
486 static int perf_inject__sched_switch(struct perf_tool
*tool
,
487 union perf_event
*event
,
488 struct perf_sample
*sample
,
489 struct perf_evsel
*evsel
,
490 struct machine
*machine
)
492 struct perf_inject
*inject
= container_of(tool
, struct perf_inject
, tool
);
493 struct event_entry
*ent
;
495 perf_inject__sched_process_exit(tool
, event
, sample
, evsel
, machine
);
497 ent
= malloc(event
->header
.size
+ sizeof(struct event_entry
));
499 color_fprintf(stderr
, PERF_COLOR_RED
,
500 "Not enough memory to process sched switch event!");
504 ent
->tid
= sample
->tid
;
505 memcpy(&ent
->event
, event
, event
->header
.size
);
506 list_add(&ent
->node
, &inject
->samples
);
510 static int perf_inject__sched_stat(struct perf_tool
*tool
,
511 union perf_event
*event __maybe_unused
,
512 struct perf_sample
*sample
,
513 struct perf_evsel
*evsel
,
514 struct machine
*machine
)
516 struct event_entry
*ent
;
517 union perf_event
*event_sw
;
518 struct perf_sample sample_sw
;
519 struct perf_inject
*inject
= container_of(tool
, struct perf_inject
, tool
);
520 u32 pid
= perf_evsel__intval(evsel
, sample
, "pid");
522 list_for_each_entry(ent
, &inject
->samples
, node
) {
529 event_sw
= &ent
->event
[0];
530 perf_evsel__parse_sample(evsel
, event_sw
, &sample_sw
);
532 sample_sw
.period
= sample
->period
;
533 sample_sw
.time
= sample
->time
;
534 perf_event__synthesize_sample(event_sw
, evsel
->attr
.sample_type
,
535 evsel
->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
);
541 static void sig_handler(int sig __maybe_unused
)
546 static int perf_evsel__check_stype(struct perf_evsel
*evsel
,
547 u64 sample_type
, const char *sample_msg
)
549 struct perf_event_attr
*attr
= &evsel
->attr
;
550 const char *name
= perf_evsel__name(evsel
);
552 if (!(attr
->sample_type
& sample_type
)) {
553 pr_err("Samples for %s event do not have %s attribute set.",
561 static 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 perf_evsel
*evsel __maybe_unused
,
565 struct machine
*machine __maybe_unused
)
570 static void strip_init(struct perf_inject
*inject
)
572 struct perf_evlist
*evlist
= inject
->session
->evlist
;
573 struct perf_evsel
*evsel
;
575 inject
->tool
.context_switch
= perf_event__drop
;
577 evlist__for_each_entry(evlist
, evsel
)
578 evsel
->handler
= drop_sample
;
581 static bool has_tracking(struct perf_evsel
*evsel
)
583 return evsel
->attr
.mmap
|| evsel
->attr
.mmap2
|| evsel
->attr
.comm
||
587 #define COMPAT_MASK (PERF_SAMPLE_ID | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | \
588 PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_IDENTIFIER)
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.
595 static bool ok_to_remove(struct perf_evlist
*evlist
,
596 struct perf_evsel
*evsel_to_remove
)
598 struct perf_evsel
*evsel
;
602 if (!has_tracking(evsel_to_remove
))
605 evlist__for_each_entry(evlist
, evsel
) {
606 if (evsel
->handler
!= drop_sample
) {
608 if ((evsel
->attr
.sample_type
& COMPAT_MASK
) ==
609 (evsel_to_remove
->attr
.sample_type
& COMPAT_MASK
))
614 return ok
&& cnt
== 1;
617 static void strip_fini(struct perf_inject
*inject
)
619 struct perf_evlist
*evlist
= inject
->session
->evlist
;
620 struct perf_evsel
*evsel
, *tmp
;
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 perf_evlist__remove(evlist
, evsel
);
628 perf_evsel__delete(evsel
);
633 static int __cmd_inject(struct perf_inject
*inject
)
636 struct perf_session
*session
= inject
->session
;
637 struct perf_data_file
*file_out
= &inject
->output
;
638 int fd
= perf_data_file__fd(file_out
);
639 u64 output_data_offset
;
641 signal(SIGINT
, sig_handler
);
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
;
651 output_data_offset
= session
->header
.data_offset
;
653 if (inject
->build_ids
) {
654 inject
->tool
.sample
= perf_event__inject_buildid
;
655 } else if (inject
->sched_stat
) {
656 struct perf_evsel
*evsel
;
658 evlist__for_each_entry(session
->evlist
, evsel
) {
659 const char *name
= perf_evsel__name(evsel
);
661 if (!strcmp(name
, "sched:sched_switch")) {
662 if (perf_evsel__check_stype(evsel
, PERF_SAMPLE_TID
, "TID"))
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
;
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;
690 if (!inject
->itrace_synth_opts
.set
)
691 auxtrace_index__free(&session
->auxtrace_index
);
693 if (!file_out
->is_pipe
)
694 lseek(fd
, output_data_offset
, SEEK_SET
);
696 ret
= perf_session__process_events(session
);
698 if (!file_out
->is_pipe
) {
699 if (inject
->build_ids
)
700 perf_header__set_feat(&session
->header
,
703 * Keep all buildids when there is unprocessed AUX data because
704 * it is not known which ones the AUX trace hits.
706 if (perf_header__has_feat(&session
->header
, HEADER_BUILD_ID
) &&
707 inject
->have_auxtrace
&& !inject
->itrace_synth_opts
.set
)
708 dsos__hit_all(session
);
710 * The AUX areas have been removed and replaced with
711 * synthesized hardware events, so clear the feature flag and
714 if (inject
->itrace_synth_opts
.set
) {
715 struct perf_evsel
*evsel
;
717 perf_header__clear_feat(&session
->header
,
719 if (inject
->itrace_synth_opts
.last_branch
)
720 perf_header__set_feat(&session
->header
,
721 HEADER_BRANCH_STACK
);
722 evsel
= perf_evlist__id2evsel_strict(session
->evlist
,
725 pr_debug("Deleting %s\n",
726 perf_evsel__name(evsel
));
727 perf_evlist__remove(session
->evlist
, evsel
);
728 perf_evsel__delete(evsel
);
733 session
->header
.data_offset
= output_data_offset
;
734 session
->header
.data_size
= inject
->bytes_written
;
735 perf_session__write_header(session
, session
->evlist
, fd
, true);
741 int cmd_inject(int argc
, const char **argv
, const char *prefix __maybe_unused
)
743 struct perf_inject inject
= {
745 .sample
= perf_event__repipe_sample
,
746 .mmap
= perf_event__repipe
,
747 .mmap2
= perf_event__repipe
,
748 .comm
= perf_event__repipe
,
749 .fork
= perf_event__repipe
,
750 .exit
= perf_event__repipe
,
751 .lost
= perf_event__repipe
,
752 .lost_samples
= perf_event__repipe
,
753 .aux
= perf_event__repipe
,
754 .itrace_start
= perf_event__repipe
,
755 .context_switch
= perf_event__repipe
,
756 .read
= perf_event__repipe_sample
,
757 .throttle
= perf_event__repipe
,
758 .unthrottle
= perf_event__repipe
,
759 .attr
= perf_event__repipe_attr
,
760 .tracing_data
= perf_event__repipe_op2_synth
,
761 .auxtrace_info
= perf_event__repipe_op2_synth
,
762 .auxtrace
= perf_event__repipe_auxtrace
,
763 .auxtrace_error
= perf_event__repipe_op2_synth
,
764 .time_conv
= perf_event__repipe_op2_synth
,
765 .finished_round
= perf_event__repipe_oe_synth
,
766 .build_id
= perf_event__repipe_op2_synth
,
767 .id_index
= perf_event__repipe_op2_synth
,
770 .samples
= LIST_HEAD_INIT(inject
.samples
),
773 .mode
= PERF_DATA_MODE_WRITE
,
776 struct perf_data_file file
= {
777 .mode
= PERF_DATA_MODE_READ
,
781 struct option options
[] = {
782 OPT_BOOLEAN('b', "build-ids", &inject
.build_ids
,
783 "Inject build-ids into the output stream"),
784 OPT_STRING('i', "input", &inject
.input_name
, "file",
786 OPT_STRING('o', "output", &inject
.output
.path
, "file",
788 OPT_BOOLEAN('s', "sched-stat", &inject
.sched_stat
,
789 "Merge sched-stat and sched-switch for getting events "
790 "where and how long tasks slept"),
792 OPT_BOOLEAN('j', "jit", &inject
.jit_mode
, "merge jitdump files into perf.data file"),
794 OPT_INCR('v', "verbose", &verbose
,
795 "be more verbose (show build ids, etc)"),
796 OPT_STRING(0, "kallsyms", &symbol_conf
.kallsyms_name
, "file",
797 "kallsyms pathname"),
798 OPT_BOOLEAN('f', "force", &file
.force
, "don't complain, do it"),
799 OPT_CALLBACK_OPTARG(0, "itrace", &inject
.itrace_synth_opts
,
800 NULL
, "opts", "Instruction Tracing options",
801 itrace_parse_synth_opts
),
802 OPT_BOOLEAN(0, "strip", &inject
.strip
,
803 "strip non-synthesized events (use with --itrace)"),
806 const char * const inject_usage
[] = {
807 "perf inject [<options>]",
811 set_option_nobuild(options
, 'j', "jit", "NO_LIBELF=1", true);
813 argc
= parse_options(argc
, argv
, options
, inject_usage
, 0);
816 * Any (unrecognized) arguments left?
819 usage_with_options(inject_usage
, options
);
821 if (inject
.strip
&& !inject
.itrace_synth_opts
.set
) {
822 pr_err("--strip option requires --itrace option\n");
826 if (perf_data_file__open(&inject
.output
)) {
827 perror("failed to create output file");
831 inject
.tool
.ordered_events
= inject
.sched_stat
;
833 file
.path
= inject
.input_name
;
834 inject
.session
= perf_session__new(&file
, true, &inject
.tool
);
835 if (inject
.session
== NULL
)
838 if (inject
.build_ids
) {
840 * to make sure the mmap records are ordered correctly
841 * and so that the correct especially due to jitted code
842 * mmaps. We cannot generate the buildid hit list and
843 * inject the jit mmaps at the same time for now.
845 inject
.tool
.ordered_events
= true;
846 inject
.tool
.ordering_requires_timestamps
= true;
849 if (inject
.jit_mode
) {
850 inject
.tool
.mmap2
= perf_event__jit_repipe_mmap2
;
851 inject
.tool
.mmap
= perf_event__jit_repipe_mmap
;
852 inject
.tool
.ordered_events
= true;
853 inject
.tool
.ordering_requires_timestamps
= true;
855 * JIT MMAP injection injects all MMAP events in one go, so it
856 * does not obey finished_round semantics.
858 inject
.tool
.finished_round
= perf_event__drop_oe
;
861 ret
= symbol__init(&inject
.session
->header
.env
);
865 ret
= __cmd_inject(&inject
);
868 perf_session__delete(inject
.session
);