[mirror_ubuntu-bionic-kernel.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/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)
{
	int ret;

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

	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.func) {
		inject_handler f = evsel->handler.func;
		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_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 *self)
{
	if (self->has_build_id)
		return 0;

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

	return -1;
}

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

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

	if (self->kernel)
		misc = PERF_RECORD_MISC_KERNEL;

	err = perf_event__synthesize_build_id(tool, self, misc, perf_event__repipe,
					      machine);
	if (err) {
		pr_err("Can't synthesize build_id event for %s\n", self->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, event->ip.pid, event->ip.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,
			      event->ip.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 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,
				      &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);
}

extern volatile int session_done;

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;

	signal(SIGINT, sig_handler);

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

	session = perf_session__new(inject->input_name, O_RDONLY, false, 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.func = perf_inject__sched_switch;
			} else if (!strcmp(name, "sched:sched_process_exit"))
				evsel->handler.func = perf_inject__sched_process_exit;
			else if (!strncmp(name, "sched:sched_stat_", 17))
				evsel->handler.func = 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,
			.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"
454c407e TZ	18
	19	#include "util/parse-options.h"
	20
26a031e1 AV	21	#include <linux/list.h>
26a031e1 AV	22
5ded57ac ACM	23	struct perf_inject {
	24	struct perf_tool tool;
	25	bool build_ids;
26a031e1	26	bool sched_stat;
e558a5bd AV	27	const char *input_name;
	28	int pipe_output,
	29	output;
	30	u64 bytes_written;
26a031e1 AV	31	struct list_head samples;
	32	};
	33
	34	struct event_entry {
	35	struct list_head node;
	36	u32 tid;
	37	union perf_event event[0];
5ded57ac	38	};
454c407e	39
e558a5bd	40	static int perf_event__repipe_synth(struct perf_tool *tool,
63c2c9f8	41	union perf_event *event)
454c407e	42	{
e558a5bd	43	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
454c407e TZ	44	uint32_t size;
	45	void *buf = event;
	46
	47	size = event->header.size;
	48
	49	while (size) {
e558a5bd	50	int ret = write(inject->output, buf, size);
454c407e TZ	51	if (ret < 0)
	52	return -errno;
	53
	54	size -= ret;
	55	buf += ret;
e558a5bd	56	inject->bytes_written += ret;
454c407e TZ	57	}
	58
	59	return 0;
	60	}
	61
45694aa7	62	static int perf_event__repipe_op2_synth(struct perf_tool *tool,
743eb868	63	union perf_event *event,
1d037ca1 IT	64	struct perf_session *session
1d037ca1 IT	65	__maybe_unused)
743eb868	66	{
63c2c9f8	67	return perf_event__repipe_synth(tool, event);
743eb868 ACM	68	}
743eb868 ACM	69
47c3d109 AH	70	static int perf_event__repipe_attr(struct perf_tool *tool,
	71	union perf_event *event,
	72	struct perf_evlist **pevlist)
10d0f086	73	{
1a1ed1ba	74	int ret;
47c3d109 AH	75
47c3d109 AH	76	ret = perf_event__process_attr(tool, event, pevlist);
1a1ed1ba SE	77	if (ret)
	78	return ret;
	79
47c3d109	80	return perf_event__repipe_synth(tool, event);
10d0f086 ACM	81	}
10d0f086 ACM	82
45694aa7	83	static int perf_event__repipe(struct perf_tool *tool,
d20deb64	84	union perf_event *event,
1d037ca1	85	struct perf_sample *sample __maybe_unused,
63c2c9f8	86	struct machine *machine __maybe_unused)
640c03ce	87	{
63c2c9f8	88	return perf_event__repipe_synth(tool, event);
640c03ce ACM	89	}
640c03ce ACM	90
26a031e1 AV	91	typedef int (inject_handler)(struct perf_tool tool,
	92	union perf_event *event,
	93	struct perf_sample *sample,
	94	struct perf_evsel *evsel,
	95	struct machine *machine);
	96
45694aa7	97	static int perf_event__repipe_sample(struct perf_tool *tool,
d20deb64	98	union perf_event *event,
26a031e1 AV	99	struct perf_sample *sample,
	100	struct perf_evsel *evsel,
	101	struct machine *machine)
9e69c210	102	{
26a031e1 AV	103	if (evsel->handler.func) {
	104	inject_handler f = evsel->handler.func;
	105	return f(tool, event, sample, evsel, machine);
	106	}
	107
54a3cf59 AV	108	build_id__mark_dso_hit(tool, event, sample, evsel, machine);
54a3cf59 AV	109
63c2c9f8	110	return perf_event__repipe_synth(tool, event);
9e69c210 ACM	111	}
9e69c210 ACM	112
45694aa7	113	static int perf_event__repipe_mmap(struct perf_tool *tool,
d20deb64	114	union perf_event *event,
8115d60c	115	struct perf_sample *sample,
743eb868	116	struct machine *machine)
454c407e TZ	117	{
	118	int err;
	119
45694aa7 ACM	120	err = perf_event__process_mmap(tool, event, sample, machine);
45694aa7 ACM	121	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	122
	123	return err;
	124	}
	125
f62d3f0f	126	static int perf_event__repipe_fork(struct perf_tool *tool,
d20deb64	127	union perf_event *event,
8115d60c	128	struct perf_sample *sample,
743eb868	129	struct machine *machine)
454c407e TZ	130	{
	131	int err;
	132
f62d3f0f	133	err = perf_event__process_fork(tool, event, sample, machine);
45694aa7	134	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	135
	136	return err;
	137	}
	138
47c3d109 AH	139	static int perf_event__repipe_tracing_data(struct perf_tool *tool,
47c3d109 AH	140	union perf_event *event,
8115d60c	141	struct perf_session *session)
454c407e TZ	142	{
	143	int err;
	144
47c3d109 AH	145	perf_event__repipe_synth(tool, event);
47c3d109 AH	146	err = perf_event__process_tracing_data(tool, event, session);
454c407e TZ	147
	148	return err;
	149	}
	150
090f7204	151	static int dso__read_build_id(struct dso *self)
454c407e	152	{
090f7204 ACM	153	if (self->has_build_id)
090f7204 ACM	154	return 0;
454c407e	155
090f7204 ACM	156	if (filename__read_build_id(self->long_name, self->build_id,
	157	sizeof(self->build_id)) > 0) {
	158	self->has_build_id = true;
	159	return 0;
	160	}
454c407e	161
090f7204 ACM	162	return -1;
090f7204 ACM	163	}
454c407e	164
45694aa7	165	static int dso__inject_build_id(struct dso self, struct perf_tool tool,
743eb868	166	struct machine *machine)
090f7204 ACM	167	{
090f7204 ACM	168	u16 misc = PERF_RECORD_MISC_USER;
090f7204	169	int err;
454c407e	170
090f7204 ACM	171	if (dso__read_build_id(self) < 0) {
	172	pr_debug("no build_id found for %s\n", self->long_name);
	173	return -1;
	174	}
454c407e	175
090f7204 ACM	176	if (self->kernel)
090f7204 ACM	177	misc = PERF_RECORD_MISC_KERNEL;
454c407e	178
45694aa7	179	err = perf_event__synthesize_build_id(tool, self, misc, perf_event__repipe,
743eb868	180	machine);
090f7204 ACM	181	if (err) {
090f7204 ACM	182	pr_err("Can't synthesize build_id event for %s\n", self->long_name);
454c407e TZ	183	return -1;
	184	}
	185
	186	return 0;
	187	}
	188
45694aa7	189	static int perf_event__inject_buildid(struct perf_tool *tool,
d20deb64	190	union perf_event *event,
8115d60c	191	struct perf_sample *sample,
1d037ca1	192	struct perf_evsel *evsel __maybe_unused,
743eb868	193	struct machine *machine)
454c407e TZ	194	{
	195	struct addr_location al;
	196	struct thread *thread;
	197	u8 cpumode;
454c407e TZ	198
	199	cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
	200
314add6b	201	thread = machine__findnew_thread(machine, event->ip.pid, event->ip.pid);
454c407e TZ	202	if (thread == NULL) {
	203	pr_err("problem processing %d event, skipping it.\n",
	204	event->header.type);
454c407e TZ	205	goto repipe;
	206	}
	207
743eb868	208	thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
326f59bf	209	event->ip.ip, &al);
454c407e TZ	210
	211	if (al.map != NULL) {
	212	if (!al.map->dso->hit) {
	213	al.map->dso->hit = 1;
090f7204	214	if (map__load(al.map, NULL) >= 0) {
45694aa7	215	dso__inject_build_id(al.map->dso, tool, machine);
090f7204 ACM	216	/*
	217	* If this fails, too bad, let the other side
	218	* account this as unresolved.
	219	*/
393be2e3	220	} else {
29a0fc9b	221	#ifdef LIBELF_SUPPORT
454c407e TZ	222	pr_warning("no symbols found in %s, maybe "
	223	"install a debug package?\n",
	224	al.map->dso->long_name);
393be2e3 NK	225	#endif
393be2e3 NK	226	}
454c407e TZ	227	}
	228	}
	229
	230	repipe:
45694aa7	231	perf_event__repipe(tool, event, sample, machine);
090f7204	232	return 0;
454c407e TZ	233	}
454c407e TZ	234
26a031e1 AV	235	static int perf_inject__sched_process_exit(struct perf_tool *tool,
	236	union perf_event *event __maybe_unused,
	237	struct perf_sample *sample,
	238	struct perf_evsel *evsel __maybe_unused,
	239	struct machine *machine __maybe_unused)
	240	{
	241	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	242	struct event_entry *ent;
	243
	244	list_for_each_entry(ent, &inject->samples, node) {
	245	if (sample->tid == ent->tid) {
	246	list_del_init(&ent->node);
	247	free(ent);
	248	break;
	249	}
	250	}
	251
	252	return 0;
	253	}
	254
	255	static int perf_inject__sched_switch(struct perf_tool *tool,
	256	union perf_event *event,
	257	struct perf_sample *sample,
	258	struct perf_evsel *evsel,
	259	struct machine *machine)
	260	{
	261	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	262	struct event_entry *ent;
	263
	264	perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
	265
	266	ent = malloc(event->header.size + sizeof(struct event_entry));
	267	if (ent == NULL) {
	268	color_fprintf(stderr, PERF_COLOR_RED,
	269	"Not enough memory to process sched switch event!");
	270	return -1;
	271	}
	272
	273	ent->tid = sample->tid;
	274	memcpy(&ent->event, event, event->header.size);
	275	list_add(&ent->node, &inject->samples);
	276	return 0;
	277	}
	278
	279	static int perf_inject__sched_stat(struct perf_tool *tool,
	280	union perf_event *event __maybe_unused,
	281	struct perf_sample *sample,
	282	struct perf_evsel *evsel,
	283	struct machine *machine)
	284	{
	285	struct event_entry *ent;
	286	union perf_event *event_sw;
	287	struct perf_sample sample_sw;
	288	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	289	u32 pid = perf_evsel__intval(evsel, sample, "pid");
	290
	291	list_for_each_entry(ent, &inject->samples, node) {
	292	if (pid == ent->tid)
	293	goto found;
	294	}
	295
	296	return 0;
	297	found:
	298	event_sw = &ent->event[0];
299	perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
300
301	sample_sw.period = sample->period;
302	sample_sw.time = sample->time;
303	perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
304	&sample_sw, false);
54a3cf59	305	build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
26a031e1 AV	306	return perf_event__repipe(tool, event_sw, &sample_sw, machine);
	307	}
	308
454c407e TZ	309	extern volatile int session_done;
454c407e TZ	310
1d037ca1	311	static void sig_handler(int sig __maybe_unused)
454c407e TZ	312	{
	313	session_done = 1;
	314	}
	315
26a031e1 AV	316	static int perf_evsel__check_stype(struct perf_evsel *evsel,
	317	u64 sample_type, const char *sample_msg)
	318	{
	319	struct perf_event_attr *attr = &evsel->attr;
	320	const char *name = perf_evsel__name(evsel);
	321
	322	if (!(attr->sample_type & sample_type)) {
	323	pr_err("Samples for %s event do not have %s attribute set.",
	324	name, sample_msg);
	325	return -EINVAL;
	326	}
	327
	328	return 0;
	329	}
	330
5ded57ac	331	static int __cmd_inject(struct perf_inject *inject)
454c407e TZ	332	{
	333	struct perf_session *session;
	334	int ret = -EINVAL;
	335
	336	signal(SIGINT, sig_handler);
	337
54a3cf59	338	if (inject->build_ids \|\| inject->sched_stat) {
5ded57ac	339	inject->tool.mmap = perf_event__repipe_mmap;
f62d3f0f	340	inject->tool.fork = perf_event__repipe_fork;
5ded57ac	341	inject->tool.tracing_data = perf_event__repipe_tracing_data;
454c407e TZ	342	}
454c407e TZ	343
e558a5bd	344	session = perf_session__new(inject->input_name, O_RDONLY, false, true, &inject->tool);
454c407e TZ	345	if (session == NULL)
	346	return -ENOMEM;
	347
54a3cf59 AV	348	if (inject->build_ids) {
	349	inject->tool.sample = perf_event__inject_buildid;
	350	} else if (inject->sched_stat) {
26a031e1 AV	351	struct perf_evsel *evsel;
	352
	353	inject->tool.ordered_samples = true;
	354
	355	list_for_each_entry(evsel, &session->evlist->entries, node) {
	356	const char *name = perf_evsel__name(evsel);
	357
	358	if (!strcmp(name, "sched:sched_switch")) {
	359	if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
	360	return -EINVAL;
	361
	362	evsel->handler.func = perf_inject__sched_switch;
	363	} else if (!strcmp(name, "sched:sched_process_exit"))
	364	evsel->handler.func = perf_inject__sched_process_exit;
	365	else if (!strncmp(name, "sched:sched_stat_", 17))
	366	evsel->handler.func = perf_inject__sched_stat;
	367	}
	368	}
	369
e558a5bd AV	370	if (!inject->pipe_output)
	371	lseek(inject->output, session->header.data_offset, SEEK_SET);
	372
5ded57ac	373	ret = perf_session__process_events(session, &inject->tool);
454c407e	374
e558a5bd AV	375	if (!inject->pipe_output) {
	376	session->header.data_size = inject->bytes_written;
	377	perf_session__write_header(session, session->evlist, inject->output, true);
	378	}
	379
454c407e TZ	380	perf_session__delete(session);
	381
	382	return ret;
	383	}
	384
1d037ca1	385	int cmd_inject(int argc, const char *argv, const char prefix __maybe_unused)
454c407e	386	{
5ded57ac ACM	387	struct perf_inject inject = {
	388	.tool = {
	389	.sample = perf_event__repipe_sample,
	390	.mmap = perf_event__repipe,
	391	.comm = perf_event__repipe,
	392	.fork = perf_event__repipe,
	393	.exit = perf_event__repipe,
	394	.lost = perf_event__repipe,
	395	.read = perf_event__repipe_sample,
	396	.throttle = perf_event__repipe,
	397	.unthrottle = perf_event__repipe,
	398	.attr = perf_event__repipe_attr,
47c3d109	399	.tracing_data = perf_event__repipe_op2_synth,
a609bda7	400	.finished_round = perf_event__repipe_op2_synth,
5ded57ac ACM	401	.build_id = perf_event__repipe_op2_synth,
5ded57ac ACM	402	},
e558a5bd	403	.input_name = "-",
26a031e1	404	.samples = LIST_HEAD_INIT(inject.samples),
5ded57ac	405	};
e558a5bd	406	const char *output_name = "-";
5ded57ac ACM	407	const struct option options[] = {
	408	OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
	409	"Inject build-ids into the output stream"),
e558a5bd AV	410	OPT_STRING('i', "input", &inject.input_name, "file",
	411	"input file name"),
	412	OPT_STRING('o', "output", &output_name, "file",
	413	"output file name"),
26a031e1 AV	414	OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
	415	"Merge sched-stat and sched-switch for getting events "
	416	"where and how long tasks slept"),
5ded57ac ACM	417	OPT_INCR('v', "verbose", &verbose,
	418	"be more verbose (show build ids, etc)"),
	419	OPT_END()
	420	};
002439e8 ACM	421	const char * const inject_usage[] = {
	422	"perf inject [<options>]",
	423	NULL
	424	};
5ded57ac	425
002439e8	426	argc = parse_options(argc, argv, options, inject_usage, 0);
454c407e TZ	427
	428	/*
	429	* Any (unrecognized) arguments left?
	430	*/
	431	if (argc)
002439e8	432	usage_with_options(inject_usage, options);
454c407e	433
e558a5bd AV	434	if (!strcmp(output_name, "-")) {
	435	inject.pipe_output = 1;
	436	inject.output = STDOUT_FILENO;
	437	} else {
	438	inject.output = open(output_name, O_CREAT \| O_WRONLY \| O_TRUNC,
	439	S_IRUSR \| S_IWUSR);
	440	if (inject.output < 0) {
	441	perror("failed to create output file");
	442	return -1;
	443	}
	444	}
	445
454c407e TZ	446	if (symbol__init() < 0)
	447	return -1;
	448
5ded57ac	449	return __cmd_inject(&inject);
454c407e	450	}