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