[deliverable/linux.git] / tools / perf / builtin-inject.c

/*
 * builtin-inject.c
 *
 * Builtin inject command: Examine the live mode (stdin) event stream
 * and repipe it to stdout while optionally injecting additional
 * events into it.
 */
#include "builtin.h"

#include "perf.h"
#include "util/color.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/session.h"
#include "util/tool.h"
#include "util/debug.h"
#include "util/build-id.h"
#include "util/data.h"

#include "util/parse-options.h"

#include <linux/list.h>

struct perf_inject {
	struct perf_tool tool;
	bool		 build_ids;
	bool		 sched_stat;
	const char	 *input_name;
	int		 pipe_output,
			 output;
	u64		 bytes_written;
	struct list_head samples;
};

struct event_entry {
	struct list_head node;
	u32		 tid;
	union perf_event event[0];
};

static int perf_event__repipe_synth(struct perf_tool *tool,
				    union perf_event *event)
{
	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	uint32_t size;
	void *buf = event;

	size = event->header.size;

	while (size) {
		int ret = write(inject->output, buf, size);
		if (ret < 0)
			return -errno;

		size -= ret;
		buf += ret;
		inject->bytes_written += ret;
	}

	return 0;
}

static int perf_event__repipe_op2_synth(struct perf_tool *tool,
					union perf_event *event,
					struct perf_session *session
					__maybe_unused)
{
	return perf_event__repipe_synth(tool, event);
}

static int perf_event__repipe_attr(struct perf_tool *tool,
				   union perf_event *event,
				   struct perf_evlist **pevlist)
{
	struct perf_inject *inject = container_of(tool, struct perf_inject,
						  tool);
	int ret;

	ret = perf_event__process_attr(tool, event, pevlist);
	if (ret)
		return ret;

	if (!inject->pipe_output)
		return 0;

	return perf_event__repipe_synth(tool, event);
}

static int perf_event__repipe(struct perf_tool *tool,
			      union perf_event *event,
			      struct perf_sample *sample __maybe_unused,
			      struct machine *machine __maybe_unused)
{
	return perf_event__repipe_synth(tool, event);
}

typedef int (*inject_handler)(struct perf_tool *tool,
			      union perf_event *event,
			      struct perf_sample *sample,
			      struct perf_evsel *evsel,
			      struct machine *machine);

static int perf_event__repipe_sample(struct perf_tool *tool,
				     union perf_event *event,
				     struct perf_sample *sample,
				     struct perf_evsel *evsel,
				     struct machine *machine)
{
	if (evsel->handler) {
		inject_handler f = evsel->handler;
		return f(tool, event, sample, evsel, machine);
	}

	build_id__mark_dso_hit(tool, event, sample, evsel, machine);

	return perf_event__repipe_synth(tool, event);
}

static int perf_event__repipe_mmap(struct perf_tool *tool,
				   union perf_event *event,
				   struct perf_sample *sample,
				   struct machine *machine)
{
	int err;

	err = perf_event__process_mmap(tool, event, sample, machine);
	perf_event__repipe(tool, event, sample, machine);

	return err;
}

static int perf_event__repipe_mmap2(struct perf_tool *tool,
				   union perf_event *event,
				   struct perf_sample *sample,
				   struct machine *machine)
{
	int err;

	err = perf_event__process_mmap2(tool, event, sample, machine);
	perf_event__repipe(tool, event, sample, machine);

	return err;
}

static int perf_event__repipe_fork(struct perf_tool *tool,
				   union perf_event *event,
				   struct perf_sample *sample,
				   struct machine *machine)
{
	int err;

	err = perf_event__process_fork(tool, event, sample, machine);
	perf_event__repipe(tool, event, sample, machine);

	return err;
}

static int perf_event__repipe_tracing_data(struct perf_tool *tool,
					   union perf_event *event,
					   struct perf_session *session)
{
	int err;

	perf_event__repipe_synth(tool, event);
	err = perf_event__process_tracing_data(tool, event, session);

	return err;
}

static int dso__read_build_id(struct dso *dso)
{
	if (dso->has_build_id)
		return 0;

	if (filename__read_build_id(dso->long_name, dso->build_id,
				    sizeof(dso->build_id)) > 0) {
		dso->has_build_id = true;
		return 0;
	}

	return -1;
}

static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
				struct machine *machine)
{
	u16 misc = PERF_RECORD_MISC_USER;
	int err;

	if (dso__read_build_id(dso) < 0) {
		pr_debug("no build_id found for %s\n", dso->long_name);
		return -1;
	}

	if (dso->kernel)
		misc = PERF_RECORD_MISC_KERNEL;

	err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
					      machine);
	if (err) {
		pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
		return -1;
	}

	return 0;
}

static int perf_event__inject_buildid(struct perf_tool *tool,
				      union perf_event *event,
				      struct perf_sample *sample,
				      struct perf_evsel *evsel __maybe_unused,
				      struct machine *machine)
{
	struct addr_location al;
	struct thread *thread;
	u8 cpumode;

	cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;

	thread = machine__findnew_thread(machine, sample->pid, sample->pid);
	if (thread == NULL) {
		pr_err("problem processing %d event, skipping it.\n",
		       event->header.type);
		goto repipe;
	}

	thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
			      sample->ip, &al);

	if (al.map != NULL) {
		if (!al.map->dso->hit) {
			al.map->dso->hit = 1;
			if (map__load(al.map, NULL) >= 0) {
				dso__inject_build_id(al.map->dso, tool, machine);
				/*
				 * If this fails, too bad, let the other side
				 * account this as unresolved.
				 */
			} else {
#ifdef HAVE_LIBELF_SUPPORT
				pr_warning("no symbols found in %s, maybe "
					   "install a debug package?\n",
					   al.map->dso->long_name);
#endif
			}
		}
	}

repipe:
	perf_event__repipe(tool, event, sample, machine);
	return 0;
}

static int perf_inject__sched_process_exit(struct perf_tool *tool,
					   union perf_event *event __maybe_unused,
					   struct perf_sample *sample,
					   struct perf_evsel *evsel __maybe_unused,
					   struct machine *machine __maybe_unused)
{
	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	struct event_entry *ent;

	list_for_each_entry(ent, &inject->samples, node) {
		if (sample->tid == ent->tid) {
			list_del_init(&ent->node);
			free(ent);
			break;
		}
	}

	return 0;
}

static int perf_inject__sched_switch(struct perf_tool *tool,
				     union perf_event *event,
				     struct perf_sample *sample,
				     struct perf_evsel *evsel,
				     struct machine *machine)
{
	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	struct event_entry *ent;

	perf_inject__sched_process_exit(tool, event, sample, evsel, machine);

	ent = malloc(event->header.size + sizeof(struct event_entry));
	if (ent == NULL) {
		color_fprintf(stderr, PERF_COLOR_RED,
			     "Not enough memory to process sched switch event!");
		return -1;
	}

	ent->tid = sample->tid;
	memcpy(&ent->event, event, event->header.size);
	list_add(&ent->node, &inject->samples);
	return 0;
}

static int perf_inject__sched_stat(struct perf_tool *tool,
				   union perf_event *event __maybe_unused,
				   struct perf_sample *sample,
				   struct perf_evsel *evsel,
				   struct machine *machine)
{
	struct event_entry *ent;
	union perf_event *event_sw;
	struct perf_sample sample_sw;
	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	u32 pid = perf_evsel__intval(evsel, sample, "pid");

	list_for_each_entry(ent, &inject->samples, node) {
		if (pid == ent->tid)
			goto found;
	}

	return 0;
found:
	event_sw = &ent->event[0];
	perf_evsel__parse_sample(evsel, event_sw, &sample_sw);

	sample_sw.period = sample->period;
	sample_sw.time	 = sample->time;
	perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
				      evsel->attr.sample_regs_user,
				      evsel->attr.read_format, &sample_sw,
				      false);
	build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
	return perf_event__repipe(tool, event_sw, &sample_sw, machine);
}

static void sig_handler(int sig __maybe_unused)
{
	session_done = 1;
}

static int perf_evsel__check_stype(struct perf_evsel *evsel,
				   u64 sample_type, const char *sample_msg)
{
	struct perf_event_attr *attr = &evsel->attr;
	const char *name = perf_evsel__name(evsel);

	if (!(attr->sample_type & sample_type)) {
		pr_err("Samples for %s event do not have %s attribute set.",
			name, sample_msg);
		return -EINVAL;
	}

	return 0;
}

static int __cmd_inject(struct perf_inject *inject)
{
	struct perf_session *session;
	int ret = -EINVAL;
	struct perf_data_file file = {
		.path = inject->input_name,
		.mode = PERF_DATA_MODE_READ,
	};

	signal(SIGINT, sig_handler);

	if (inject->build_ids || inject->sched_stat) {
		inject->tool.mmap	  = perf_event__repipe_mmap;
		inject->tool.mmap2	  = perf_event__repipe_mmap2;
		inject->tool.fork	  = perf_event__repipe_fork;
		inject->tool.tracing_data = perf_event__repipe_tracing_data;
	}

	session = perf_session__new(&file, true, &inject->tool);
	if (session == NULL)
		return -ENOMEM;

	if (inject->build_ids) {
		inject->tool.sample = perf_event__inject_buildid;
	} else if (inject->sched_stat) {
		struct perf_evsel *evsel;

		inject->tool.ordered_samples = true;

		list_for_each_entry(evsel, &session->evlist->entries, node) {
			const char *name = perf_evsel__name(evsel);

			if (!strcmp(name, "sched:sched_switch")) {
				if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
					return -EINVAL;

				evsel->handler = perf_inject__sched_switch;
			} else if (!strcmp(name, "sched:sched_process_exit"))
				evsel->handler = perf_inject__sched_process_exit;
			else if (!strncmp(name, "sched:sched_stat_", 17))
				evsel->handler = perf_inject__sched_stat;
		}
	}

	if (!inject->pipe_output)
		lseek(inject->output, session->header.data_offset, SEEK_SET);

	ret = perf_session__process_events(session, &inject->tool);

	if (!inject->pipe_output) {
		session->header.data_size = inject->bytes_written;
		perf_session__write_header(session, session->evlist, inject->output, true);
	}

	perf_session__delete(session);

	return ret;
}

int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
{
	struct perf_inject inject = {
		.tool = {
			.sample		= perf_event__repipe_sample,
			.mmap		= perf_event__repipe,
			.mmap2		= perf_event__repipe,
			.comm		= perf_event__repipe,
			.fork		= perf_event__repipe,
			.exit		= perf_event__repipe,
			.lost		= perf_event__repipe,
			.read		= perf_event__repipe_sample,
			.throttle	= perf_event__repipe,
			.unthrottle	= perf_event__repipe,
			.attr		= perf_event__repipe_attr,
			.tracing_data	= perf_event__repipe_op2_synth,
			.finished_round	= perf_event__repipe_op2_synth,
			.build_id	= perf_event__repipe_op2_synth,
		},
		.input_name  = "-",
		.samples = LIST_HEAD_INIT(inject.samples),
	};
	const char *output_name = "-";
	const struct option options[] = {
		OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
			    "Inject build-ids into the output stream"),
		OPT_STRING('i', "input", &inject.input_name, "file",
			   "input file name"),
		OPT_STRING('o', "output", &output_name, "file",
			   "output file name"),
		OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
			    "Merge sched-stat and sched-switch for getting events "
			    "where and how long tasks slept"),
		OPT_INCR('v', "verbose", &verbose,
			 "be more verbose (show build ids, etc)"),
		OPT_END()
	};
	const char * const inject_usage[] = {
		"perf inject [<options>]",
		NULL
	};

	argc = parse_options(argc, argv, options, inject_usage, 0);

	/*
	 * Any (unrecognized) arguments left?
	 */
	if (argc)
		usage_with_options(inject_usage, options);

	if (!strcmp(output_name, "-")) {
		inject.pipe_output = 1;
		inject.output = STDOUT_FILENO;
	} else {
		inject.output = open(output_name, O_CREAT | O_WRONLY | O_TRUNC,
						  S_IRUSR | S_IWUSR);
		if (inject.output < 0) {
			perror("failed to create output file");
			return -1;
		}
	}

	if (symbol__init() < 0)
		return -1;

	return __cmd_inject(&inject);
}
Commit	Line	Data
454c407e TZ	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"
26a031e1 AV	11	#include "util/color.h"
	12	#include "util/evlist.h"
	13	#include "util/evsel.h"
454c407e	14	#include "util/session.h"
45694aa7	15	#include "util/tool.h"
454c407e	16	#include "util/debug.h"
54a3cf59	17	#include "util/build-id.h"
f5fc1412	18	#include "util/data.h"
454c407e TZ	19
	20	#include "util/parse-options.h"
	21
26a031e1 AV	22	#include <linux/list.h>
26a031e1 AV	23
5ded57ac ACM	24	struct perf_inject {
	25	struct perf_tool tool;
	26	bool build_ids;
26a031e1	27	bool sched_stat;
e558a5bd AV	28	const char *input_name;
	29	int pipe_output,
	30	output;
	31	u64 bytes_written;
26a031e1 AV	32	struct list_head samples;
	33	};
	34
	35	struct event_entry {
	36	struct list_head node;
	37	u32 tid;
	38	union perf_event event[0];
5ded57ac	39	};
454c407e	40
e558a5bd	41	static int perf_event__repipe_synth(struct perf_tool *tool,
63c2c9f8	42	union perf_event *event)
454c407e	43	{
e558a5bd	44	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
454c407e TZ	45	uint32_t size;
	46	void *buf = event;
	47
	48	size = event->header.size;
	49
	50	while (size) {
e558a5bd	51	int ret = write(inject->output, buf, size);
454c407e TZ	52	if (ret < 0)
	53	return -errno;
	54
	55	size -= ret;
	56	buf += ret;
e558a5bd	57	inject->bytes_written += ret;
454c407e TZ	58	}
	59
	60	return 0;
	61	}
	62
45694aa7	63	static int perf_event__repipe_op2_synth(struct perf_tool *tool,
743eb868	64	union perf_event *event,
1d037ca1 IT	65	struct perf_session *session
1d037ca1 IT	66	__maybe_unused)
743eb868	67	{
63c2c9f8	68	return perf_event__repipe_synth(tool, event);
743eb868 ACM	69	}
743eb868 ACM	70
47c3d109 AH	71	static int perf_event__repipe_attr(struct perf_tool *tool,
	72	union perf_event *event,
	73	struct perf_evlist **pevlist)
10d0f086	74	{
89c97d93 AH	75	struct perf_inject *inject = container_of(tool, struct perf_inject,
89c97d93 AH	76	tool);
1a1ed1ba	77	int ret;
47c3d109 AH	78
47c3d109 AH	79	ret = perf_event__process_attr(tool, event, pevlist);
1a1ed1ba SE	80	if (ret)
	81	return ret;
	82
89c97d93 AH	83	if (!inject->pipe_output)
	84	return 0;
	85
47c3d109	86	return perf_event__repipe_synth(tool, event);
10d0f086 ACM	87	}
10d0f086 ACM	88
45694aa7	89	static int perf_event__repipe(struct perf_tool *tool,
d20deb64	90	union perf_event *event,
1d037ca1	91	struct perf_sample *sample __maybe_unused,
63c2c9f8	92	struct machine *machine __maybe_unused)
640c03ce	93	{
63c2c9f8	94	return perf_event__repipe_synth(tool, event);
640c03ce ACM	95	}
640c03ce ACM	96
26a031e1 AV	97	typedef int (inject_handler)(struct perf_tool tool,
	98	union perf_event *event,
	99	struct perf_sample *sample,
	100	struct perf_evsel *evsel,
	101	struct machine *machine);
	102
45694aa7	103	static int perf_event__repipe_sample(struct perf_tool *tool,
d20deb64	104	union perf_event *event,
26a031e1 AV	105	struct perf_sample *sample,
	106	struct perf_evsel *evsel,
	107	struct machine *machine)
9e69c210	108	{
744a9719 ACM	109	if (evsel->handler) {
744a9719 ACM	110	inject_handler f = evsel->handler;
26a031e1 AV	111	return f(tool, event, sample, evsel, machine);
	112	}
	113
54a3cf59 AV	114	build_id__mark_dso_hit(tool, event, sample, evsel, machine);
54a3cf59 AV	115
63c2c9f8	116	return perf_event__repipe_synth(tool, event);
9e69c210 ACM	117	}
9e69c210 ACM	118
45694aa7	119	static int perf_event__repipe_mmap(struct perf_tool *tool,
d20deb64	120	union perf_event *event,
8115d60c	121	struct perf_sample *sample,
743eb868	122	struct machine *machine)
454c407e TZ	123	{
	124	int err;
	125
45694aa7 ACM	126	err = perf_event__process_mmap(tool, event, sample, machine);
45694aa7 ACM	127	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	128
	129	return err;
	130	}
	131
5c5e854b SE	132	static int perf_event__repipe_mmap2(struct perf_tool *tool,
	133	union perf_event *event,
	134	struct perf_sample *sample,
	135	struct machine *machine)
	136	{
	137	int err;
	138
	139	err = perf_event__process_mmap2(tool, event, sample, machine);
	140	perf_event__repipe(tool, event, sample, machine);
	141
	142	return err;
	143	}
	144
f62d3f0f	145	static int perf_event__repipe_fork(struct perf_tool *tool,
d20deb64	146	union perf_event *event,
8115d60c	147	struct perf_sample *sample,
743eb868	148	struct machine *machine)
454c407e TZ	149	{
	150	int err;
	151
f62d3f0f	152	err = perf_event__process_fork(tool, event, sample, machine);
45694aa7	153	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	154
	155	return err;
	156	}
	157
47c3d109 AH	158	static int perf_event__repipe_tracing_data(struct perf_tool *tool,
47c3d109 AH	159	union perf_event *event,
8115d60c	160	struct perf_session *session)
454c407e TZ	161	{
	162	int err;
	163
47c3d109 AH	164	perf_event__repipe_synth(tool, event);
47c3d109 AH	165	err = perf_event__process_tracing_data(tool, event, session);
454c407e TZ	166
	167	return err;
	168	}
	169
c824c433	170	static int dso__read_build_id(struct dso *dso)
454c407e	171	{
c824c433	172	if (dso->has_build_id)
090f7204	173	return 0;
454c407e	174
c824c433 ACM	175	if (filename__read_build_id(dso->long_name, dso->build_id,
	176	sizeof(dso->build_id)) > 0) {
	177	dso->has_build_id = true;
090f7204 ACM	178	return 0;
090f7204 ACM	179	}
454c407e	180
090f7204 ACM	181	return -1;
090f7204 ACM	182	}
454c407e	183
c824c433	184	static int dso__inject_build_id(struct dso dso, struct perf_tool tool,
743eb868	185	struct machine *machine)
090f7204 ACM	186	{
090f7204 ACM	187	u16 misc = PERF_RECORD_MISC_USER;
090f7204	188	int err;
454c407e	189
c824c433 ACM	190	if (dso__read_build_id(dso) < 0) {
c824c433 ACM	191	pr_debug("no build_id found for %s\n", dso->long_name);
090f7204 ACM	192	return -1;
090f7204 ACM	193	}
454c407e	194
c824c433	195	if (dso->kernel)
090f7204	196	misc = PERF_RECORD_MISC_KERNEL;
454c407e	197
c824c433	198	err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
743eb868	199	machine);
090f7204	200	if (err) {
c824c433	201	pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
454c407e TZ	202	return -1;
	203	}
	204
	205	return 0;
	206	}
	207
45694aa7	208	static int perf_event__inject_buildid(struct perf_tool *tool,
d20deb64	209	union perf_event *event,
8115d60c	210	struct perf_sample *sample,
1d037ca1	211	struct perf_evsel *evsel __maybe_unused,
743eb868	212	struct machine *machine)
454c407e TZ	213	{
	214	struct addr_location al;
	215	struct thread *thread;
	216	u8 cpumode;
454c407e TZ	217
	218	cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
	219
ef89325f	220	thread = machine__findnew_thread(machine, sample->pid, sample->pid);
454c407e TZ	221	if (thread == NULL) {
	222	pr_err("problem processing %d event, skipping it.\n",
	223	event->header.type);
454c407e TZ	224	goto repipe;
	225	}
	226
743eb868	227	thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
ef89325f	228	sample->ip, &al);
454c407e TZ	229
	230	if (al.map != NULL) {
	231	if (!al.map->dso->hit) {
	232	al.map->dso->hit = 1;
090f7204	233	if (map__load(al.map, NULL) >= 0) {
45694aa7	234	dso__inject_build_id(al.map->dso, tool, machine);
090f7204 ACM	235	/*
	236	* If this fails, too bad, let the other side
	237	* account this as unresolved.
	238	*/
393be2e3	239	} else {
89fe808a	240	#ifdef HAVE_LIBELF_SUPPORT
454c407e TZ	241	pr_warning("no symbols found in %s, maybe "
	242	"install a debug package?\n",
	243	al.map->dso->long_name);
393be2e3 NK	244	#endif
393be2e3 NK	245	}
454c407e TZ	246	}
	247	}
	248
	249	repipe:
45694aa7	250	perf_event__repipe(tool, event, sample, machine);
090f7204	251	return 0;
454c407e TZ	252	}
454c407e TZ	253
26a031e1 AV	254	static int perf_inject__sched_process_exit(struct perf_tool *tool,
	255	union perf_event *event __maybe_unused,
	256	struct perf_sample *sample,
	257	struct perf_evsel *evsel __maybe_unused,
	258	struct machine *machine __maybe_unused)
	259	{
	260	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	261	struct event_entry *ent;
	262
	263	list_for_each_entry(ent, &inject->samples, node) {
	264	if (sample->tid == ent->tid) {
	265	list_del_init(&ent->node);
	266	free(ent);
	267	break;
	268	}
	269	}
	270
	271	return 0;
	272	}
	273
	274	static int perf_inject__sched_switch(struct perf_tool *tool,
	275	union perf_event *event,
	276	struct perf_sample *sample,
	277	struct perf_evsel *evsel,
	278	struct machine *machine)
	279	{
	280	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	281	struct event_entry *ent;
	282
	283	perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
	284
	285	ent = malloc(event->header.size + sizeof(struct event_entry));
	286	if (ent == NULL) {
	287	color_fprintf(stderr, PERF_COLOR_RED,
	288	"Not enough memory to process sched switch event!");
	289	return -1;
	290	}
	291
	292	ent->tid = sample->tid;
	293	memcpy(&ent->event, event, event->header.size);
	294	list_add(&ent->node, &inject->samples);
	295	return 0;
	296	}
	297
	298	static int perf_inject__sched_stat(struct perf_tool *tool,
	299	union perf_event *event __maybe_unused,
	300	struct perf_sample *sample,
	301	struct perf_evsel *evsel,
	302	struct machine *machine)
	303	{
	304	struct event_entry *ent;
	305	union perf_event *event_sw;
	306	struct perf_sample sample_sw;
	307	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	308	u32 pid = perf_evsel__intval(evsel, sample, "pid");
	309
	310	list_for_each_entry(ent, &inject->samples, node) {
	311	if (pid == ent->tid)
	312	goto found;
	313	}
	314
	315	return 0;
	316	found:
	317	event_sw = &ent->event[0];
318	perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
319
320	sample_sw.period = sample->period;
321	sample_sw.time = sample->time;
322	perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
d03f2170 AH	323	evsel->attr.sample_regs_user,
	324	evsel->attr.read_format, &sample_sw,
	325	false);
54a3cf59	326	build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
26a031e1 AV	327	return perf_event__repipe(tool, event_sw, &sample_sw, machine);
	328	}
	329
1d037ca1	330	static void sig_handler(int sig __maybe_unused)
454c407e TZ	331	{
	332	session_done = 1;
	333	}
	334
26a031e1 AV	335	static int perf_evsel__check_stype(struct perf_evsel *evsel,
	336	u64 sample_type, const char *sample_msg)
	337	{
	338	struct perf_event_attr *attr = &evsel->attr;
	339	const char *name = perf_evsel__name(evsel);
	340
	341	if (!(attr->sample_type & sample_type)) {
	342	pr_err("Samples for %s event do not have %s attribute set.",
	343	name, sample_msg);
	344	return -EINVAL;
	345	}
	346
	347	return 0;
	348	}
	349
5ded57ac	350	static int __cmd_inject(struct perf_inject *inject)
454c407e TZ	351	{
	352	struct perf_session *session;
	353	int ret = -EINVAL;
f5fc1412 JO	354	struct perf_data_file file = {
	355	.path = inject->input_name,
	356	.mode = PERF_DATA_MODE_READ,
	357	};
454c407e TZ	358
	359	signal(SIGINT, sig_handler);
	360
54a3cf59	361	if (inject->build_ids \|\| inject->sched_stat) {
5ded57ac	362	inject->tool.mmap = perf_event__repipe_mmap;
5c5e854b	363	inject->tool.mmap2 = perf_event__repipe_mmap2;
f62d3f0f	364	inject->tool.fork = perf_event__repipe_fork;
5ded57ac	365	inject->tool.tracing_data = perf_event__repipe_tracing_data;
454c407e TZ	366	}
454c407e TZ	367
f5fc1412	368	session = perf_session__new(&file, true, &inject->tool);
454c407e TZ	369	if (session == NULL)
	370	return -ENOMEM;
	371
54a3cf59 AV	372	if (inject->build_ids) {
	373	inject->tool.sample = perf_event__inject_buildid;
	374	} else if (inject->sched_stat) {
26a031e1 AV	375	struct perf_evsel *evsel;
	376
	377	inject->tool.ordered_samples = true;
	378
	379	list_for_each_entry(evsel, &session->evlist->entries, node) {
	380	const char *name = perf_evsel__name(evsel);
	381
	382	if (!strcmp(name, "sched:sched_switch")) {
	383	if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
	384	return -EINVAL;
	385
744a9719	386	evsel->handler = perf_inject__sched_switch;
26a031e1	387	} else if (!strcmp(name, "sched:sched_process_exit"))
744a9719	388	evsel->handler = perf_inject__sched_process_exit;
26a031e1	389	else if (!strncmp(name, "sched:sched_stat_", 17))
744a9719	390	evsel->handler = perf_inject__sched_stat;
26a031e1 AV	391	}
	392	}
	393
e558a5bd AV	394	if (!inject->pipe_output)
	395	lseek(inject->output, session->header.data_offset, SEEK_SET);
	396
5ded57ac	397	ret = perf_session__process_events(session, &inject->tool);
454c407e	398
e558a5bd AV	399	if (!inject->pipe_output) {
	400	session->header.data_size = inject->bytes_written;
	401	perf_session__write_header(session, session->evlist, inject->output, true);
	402	}
	403
454c407e TZ	404	perf_session__delete(session);
	405
	406	return ret;
	407	}
	408
1d037ca1	409	int cmd_inject(int argc, const char *argv, const char prefix __maybe_unused)
454c407e	410	{
5ded57ac ACM	411	struct perf_inject inject = {
	412	.tool = {
	413	.sample = perf_event__repipe_sample,
	414	.mmap = perf_event__repipe,
5c5e854b	415	.mmap2 = perf_event__repipe,
5ded57ac ACM	416	.comm = perf_event__repipe,
	417	.fork = perf_event__repipe,
	418	.exit = perf_event__repipe,
	419	.lost = perf_event__repipe,
	420	.read = perf_event__repipe_sample,
	421	.throttle = perf_event__repipe,
	422	.unthrottle = perf_event__repipe,
	423	.attr = perf_event__repipe_attr,
47c3d109	424	.tracing_data = perf_event__repipe_op2_synth,
a609bda7	425	.finished_round = perf_event__repipe_op2_synth,
5ded57ac ACM	426	.build_id = perf_event__repipe_op2_synth,
5ded57ac ACM	427	},
e558a5bd	428	.input_name = "-",
26a031e1	429	.samples = LIST_HEAD_INIT(inject.samples),
5ded57ac	430	};
e558a5bd	431	const char *output_name = "-";
5ded57ac ACM	432	const struct option options[] = {
	433	OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
	434	"Inject build-ids into the output stream"),
e558a5bd AV	435	OPT_STRING('i', "input", &inject.input_name, "file",
	436	"input file name"),
	437	OPT_STRING('o', "output", &output_name, "file",
	438	"output file name"),
26a031e1 AV	439	OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
	440	"Merge sched-stat and sched-switch for getting events "
	441	"where and how long tasks slept"),
5ded57ac ACM	442	OPT_INCR('v', "verbose", &verbose,
	443	"be more verbose (show build ids, etc)"),
	444	OPT_END()
	445	};
002439e8 ACM	446	const char * const inject_usage[] = {
	447	"perf inject [<options>]",
	448	NULL
	449	};
5ded57ac	450
002439e8	451	argc = parse_options(argc, argv, options, inject_usage, 0);
454c407e TZ	452
	453	/*
	454	* Any (unrecognized) arguments left?
	455	*/
	456	if (argc)
002439e8	457	usage_with_options(inject_usage, options);
454c407e	458
e558a5bd AV	459	if (!strcmp(output_name, "-")) {
	460	inject.pipe_output = 1;
	461	inject.output = STDOUT_FILENO;
	462	} else {
	463	inject.output = open(output_name, O_CREAT \| O_WRONLY \| O_TRUNC,
	464	S_IRUSR \| S_IWUSR);
	465	if (inject.output < 0) {
	466	perror("failed to create output file");
	467	return -1;
	468	}
	469	}
	470
454c407e TZ	471	if (symbol__init() < 0)
	472	return -1;
	473
5ded57ac	474	return __cmd_inject(&inject);
454c407e	475	}