[mirror_ubuntu-artful-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 machine *machine __maybe_unused)
{
	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, NULL);
}

static int perf_event__repipe_event_type_synth(struct perf_tool *tool,
					       union perf_event *event)
{
	return perf_event__repipe_synth(tool, event, NULL);
}

static int perf_event__repipe_tracing_data_synth(union perf_event *event,
						 struct perf_session *session
						 __maybe_unused)
{
	return perf_event__repipe_synth(NULL, event, NULL);
}

static int perf_event__repipe_attr(union perf_event *event,
				   struct perf_evlist **pevlist __maybe_unused)
{
	int ret;
	ret = perf_event__process_attr(event, pevlist);
	if (ret)
		return ret;

	return perf_event__repipe_synth(NULL, event, NULL);
}

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

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, machine);
}

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(union perf_event *event,
					   struct perf_session *session)
{
	int err;

	perf_event__repipe_synth(NULL, event, NULL);
	err = perf_event__process_tracing_data(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);
	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,
			.event_type	= perf_event__repipe_event_type_synth,
			.tracing_data	= perf_event__repipe_tracing_data_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,
d20deb64	41	union perf_event *event,
1d037ca1	42	struct machine *machine __maybe_unused)
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	{
45694aa7	68	return perf_event__repipe_synth(tool, event, NULL);
743eb868 ACM	69	}
743eb868 ACM	70
45694aa7	71	static int perf_event__repipe_event_type_synth(struct perf_tool *tool,
743eb868 ACM	72	union perf_event *event)
743eb868 ACM	73	{
45694aa7	74	return perf_event__repipe_synth(tool, event, NULL);
743eb868 ACM	75	}
743eb868 ACM	76
d20deb64	77	static int perf_event__repipe_tracing_data_synth(union perf_event *event,
1d037ca1 IT	78	struct perf_session *session
1d037ca1 IT	79	__maybe_unused)
d20deb64	80	{
743eb868	81	return perf_event__repipe_synth(NULL, event, NULL);
d20deb64 ACM	82	}
d20deb64 ACM	83
10d0f086	84	static int perf_event__repipe_attr(union perf_event *event,
1d037ca1	85	struct perf_evlist **pevlist __maybe_unused)
10d0f086	86	{
1a1ed1ba SE	87	int ret;
	88	ret = perf_event__process_attr(event, pevlist);
	89	if (ret)
	90	return ret;
	91
d20deb64	92	return perf_event__repipe_synth(NULL, event, NULL);
10d0f086 ACM	93	}
10d0f086 ACM	94
45694aa7	95	static int perf_event__repipe(struct perf_tool *tool,
d20deb64	96	union perf_event *event,
1d037ca1	97	struct perf_sample *sample __maybe_unused,
743eb868	98	struct machine *machine)
640c03ce	99	{
45694aa7	100	return perf_event__repipe_synth(tool, event, machine);
640c03ce ACM	101	}
640c03ce ACM	102
26a031e1 AV	103	typedef int (inject_handler)(struct perf_tool tool,
	104	union perf_event *event,
	105	struct perf_sample *sample,
	106	struct perf_evsel *evsel,
	107	struct machine *machine);
	108
45694aa7	109	static int perf_event__repipe_sample(struct perf_tool *tool,
d20deb64	110	union perf_event *event,
26a031e1 AV	111	struct perf_sample *sample,
	112	struct perf_evsel *evsel,
	113	struct machine *machine)
9e69c210	114	{
26a031e1 AV	115	if (evsel->handler.func) {
	116	inject_handler f = evsel->handler.func;
	117	return f(tool, event, sample, evsel, machine);
	118	}
	119
54a3cf59 AV	120	build_id__mark_dso_hit(tool, event, sample, evsel, machine);
54a3cf59 AV	121
45694aa7	122	return perf_event__repipe_synth(tool, event, machine);
9e69c210 ACM	123	}
9e69c210 ACM	124
45694aa7	125	static int perf_event__repipe_mmap(struct perf_tool *tool,
d20deb64	126	union perf_event *event,
8115d60c	127	struct perf_sample *sample,
743eb868	128	struct machine *machine)
454c407e TZ	129	{
	130	int err;
	131
45694aa7 ACM	132	err = perf_event__process_mmap(tool, event, sample, machine);
45694aa7 ACM	133	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	134
	135	return err;
	136	}
	137
f62d3f0f	138	static int perf_event__repipe_fork(struct perf_tool *tool,
d20deb64	139	union perf_event *event,
8115d60c	140	struct perf_sample *sample,
743eb868	141	struct machine *machine)
454c407e TZ	142	{
	143	int err;
	144
f62d3f0f	145	err = perf_event__process_fork(tool, event, sample, machine);
45694aa7	146	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	147
	148	return err;
	149	}
	150
8115d60c ACM	151	static int perf_event__repipe_tracing_data(union perf_event *event,
8115d60c ACM	152	struct perf_session *session)
454c407e TZ	153	{
	154	int err;
	155
743eb868	156	perf_event__repipe_synth(NULL, event, NULL);
8115d60c	157	err = perf_event__process_tracing_data(event, session);
454c407e TZ	158
	159	return err;
	160	}
	161
090f7204	162	static int dso__read_build_id(struct dso *self)
454c407e	163	{
090f7204 ACM	164	if (self->has_build_id)
090f7204 ACM	165	return 0;
454c407e	166
090f7204 ACM	167	if (filename__read_build_id(self->long_name, self->build_id,
	168	sizeof(self->build_id)) > 0) {
	169	self->has_build_id = true;
	170	return 0;
	171	}
454c407e	172
090f7204 ACM	173	return -1;
090f7204 ACM	174	}
454c407e	175
45694aa7	176	static int dso__inject_build_id(struct dso self, struct perf_tool tool,
743eb868	177	struct machine *machine)
090f7204 ACM	178	{
090f7204 ACM	179	u16 misc = PERF_RECORD_MISC_USER;
090f7204	180	int err;
454c407e	181
090f7204 ACM	182	if (dso__read_build_id(self) < 0) {
	183	pr_debug("no build_id found for %s\n", self->long_name);
	184	return -1;
	185	}
454c407e	186
090f7204 ACM	187	if (self->kernel)
090f7204 ACM	188	misc = PERF_RECORD_MISC_KERNEL;
454c407e	189
45694aa7	190	err = perf_event__synthesize_build_id(tool, self, misc, perf_event__repipe,
743eb868	191	machine);
090f7204 ACM	192	if (err) {
090f7204 ACM	193	pr_err("Can't synthesize build_id event for %s\n", self->long_name);
454c407e TZ	194	return -1;
	195	}
	196
	197	return 0;
	198	}
	199
45694aa7	200	static int perf_event__inject_buildid(struct perf_tool *tool,
d20deb64	201	union perf_event *event,
8115d60c	202	struct perf_sample *sample,
1d037ca1	203	struct perf_evsel *evsel __maybe_unused,
743eb868	204	struct machine *machine)
454c407e TZ	205	{
	206	struct addr_location al;
	207	struct thread *thread;
	208	u8 cpumode;
454c407e TZ	209
	210	cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
	211
743eb868	212	thread = machine__findnew_thread(machine, event->ip.pid);
454c407e TZ	213	if (thread == NULL) {
	214	pr_err("problem processing %d event, skipping it.\n",
	215	event->header.type);
454c407e TZ	216	goto repipe;
	217	}
	218
743eb868 ACM	219	thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
743eb868 ACM	220	event->ip.ip, &al);
454c407e TZ	221
	222	if (al.map != NULL) {
	223	if (!al.map->dso->hit) {
	224	al.map->dso->hit = 1;
090f7204	225	if (map__load(al.map, NULL) >= 0) {
45694aa7	226	dso__inject_build_id(al.map->dso, tool, machine);
090f7204 ACM	227	/*
	228	* If this fails, too bad, let the other side
	229	* account this as unresolved.
	230	*/
393be2e3	231	} else {
29a0fc9b	232	#ifdef LIBELF_SUPPORT
454c407e TZ	233	pr_warning("no symbols found in %s, maybe "
	234	"install a debug package?\n",
	235	al.map->dso->long_name);
393be2e3 NK	236	#endif
393be2e3 NK	237	}
454c407e TZ	238	}
	239	}
	240
	241	repipe:
45694aa7	242	perf_event__repipe(tool, event, sample, machine);
090f7204	243	return 0;
454c407e TZ	244	}
454c407e TZ	245
26a031e1 AV	246	static int perf_inject__sched_process_exit(struct perf_tool *tool,
	247	union perf_event *event __maybe_unused,
	248	struct perf_sample *sample,
	249	struct perf_evsel *evsel __maybe_unused,
	250	struct machine *machine __maybe_unused)
	251	{
	252	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	253	struct event_entry *ent;
	254
	255	list_for_each_entry(ent, &inject->samples, node) {
	256	if (sample->tid == ent->tid) {
	257	list_del_init(&ent->node);
	258	free(ent);
	259	break;
	260	}
	261	}
	262
	263	return 0;
	264	}
	265
	266	static int perf_inject__sched_switch(struct perf_tool *tool,
	267	union perf_event *event,
	268	struct perf_sample *sample,
	269	struct perf_evsel *evsel,
	270	struct machine *machine)
	271	{
	272	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	273	struct event_entry *ent;
	274
	275	perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
	276
	277	ent = malloc(event->header.size + sizeof(struct event_entry));
	278	if (ent == NULL) {
	279	color_fprintf(stderr, PERF_COLOR_RED,
	280	"Not enough memory to process sched switch event!");
	281	return -1;
	282	}
	283
	284	ent->tid = sample->tid;
	285	memcpy(&ent->event, event, event->header.size);
	286	list_add(&ent->node, &inject->samples);
	287	return 0;
	288	}
	289
	290	static int perf_inject__sched_stat(struct perf_tool *tool,
	291	union perf_event *event __maybe_unused,
	292	struct perf_sample *sample,
	293	struct perf_evsel *evsel,
	294	struct machine *machine)
	295	{
	296	struct event_entry *ent;
	297	union perf_event *event_sw;
	298	struct perf_sample sample_sw;
	299	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	300	u32 pid = perf_evsel__intval(evsel, sample, "pid");
	301
	302	list_for_each_entry(ent, &inject->samples, node) {
	303	if (pid == ent->tid)
	304	goto found;
	305	}
	306
	307	return 0;
	308	found:
	309	event_sw = &ent->event[0];
310	perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
311
312	sample_sw.period = sample->period;
313	sample_sw.time = sample->time;
314	perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
315	&sample_sw, false);
54a3cf59	316	build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
26a031e1 AV	317	return perf_event__repipe(tool, event_sw, &sample_sw, machine);
	318	}
	319
454c407e TZ	320	extern volatile int session_done;
454c407e TZ	321
1d037ca1	322	static void sig_handler(int sig __maybe_unused)
454c407e TZ	323	{
	324	session_done = 1;
	325	}
	326
26a031e1 AV	327	static int perf_evsel__check_stype(struct perf_evsel *evsel,
	328	u64 sample_type, const char *sample_msg)
	329	{
	330	struct perf_event_attr *attr = &evsel->attr;
	331	const char *name = perf_evsel__name(evsel);
	332
	333	if (!(attr->sample_type & sample_type)) {
	334	pr_err("Samples for %s event do not have %s attribute set.",
	335	name, sample_msg);
	336	return -EINVAL;
	337	}
	338
	339	return 0;
	340	}
	341
5ded57ac	342	static int __cmd_inject(struct perf_inject *inject)
454c407e TZ	343	{
	344	struct perf_session *session;
	345	int ret = -EINVAL;
	346
	347	signal(SIGINT, sig_handler);
	348
54a3cf59	349	if (inject->build_ids \|\| inject->sched_stat) {
5ded57ac	350	inject->tool.mmap = perf_event__repipe_mmap;
f62d3f0f	351	inject->tool.fork = perf_event__repipe_fork;
5ded57ac	352	inject->tool.tracing_data = perf_event__repipe_tracing_data;
454c407e TZ	353	}
454c407e TZ	354
e558a5bd	355	session = perf_session__new(inject->input_name, O_RDONLY, false, true, &inject->tool);
454c407e TZ	356	if (session == NULL)
	357	return -ENOMEM;
	358
54a3cf59 AV	359	if (inject->build_ids) {
	360	inject->tool.sample = perf_event__inject_buildid;
	361	} else if (inject->sched_stat) {
26a031e1 AV	362	struct perf_evsel *evsel;
	363
	364	inject->tool.ordered_samples = true;
	365
	366	list_for_each_entry(evsel, &session->evlist->entries, node) {
	367	const char *name = perf_evsel__name(evsel);
	368
	369	if (!strcmp(name, "sched:sched_switch")) {
	370	if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
	371	return -EINVAL;
	372
	373	evsel->handler.func = perf_inject__sched_switch;
	374	} else if (!strcmp(name, "sched:sched_process_exit"))
	375	evsel->handler.func = perf_inject__sched_process_exit;
	376	else if (!strncmp(name, "sched:sched_stat_", 17))
	377	evsel->handler.func = perf_inject__sched_stat;
	378	}
	379	}
	380
e558a5bd AV	381	if (!inject->pipe_output)
	382	lseek(inject->output, session->header.data_offset, SEEK_SET);
	383
5ded57ac	384	ret = perf_session__process_events(session, &inject->tool);
454c407e	385
e558a5bd AV	386	if (!inject->pipe_output) {
	387	session->header.data_size = inject->bytes_written;
	388	perf_session__write_header(session, session->evlist, inject->output, true);
	389	}
	390
454c407e TZ	391	perf_session__delete(session);
	392
	393	return ret;
	394	}
	395
1d037ca1	396	int cmd_inject(int argc, const char *argv, const char prefix __maybe_unused)
454c407e	397	{
5ded57ac ACM	398	struct perf_inject inject = {
	399	.tool = {
	400	.sample = perf_event__repipe_sample,
	401	.mmap = perf_event__repipe,
	402	.comm = perf_event__repipe,
	403	.fork = perf_event__repipe,
	404	.exit = perf_event__repipe,
	405	.lost = perf_event__repipe,
	406	.read = perf_event__repipe_sample,
	407	.throttle = perf_event__repipe,
	408	.unthrottle = perf_event__repipe,
	409	.attr = perf_event__repipe_attr,
	410	.event_type = perf_event__repipe_event_type_synth,
	411	.tracing_data = perf_event__repipe_tracing_data_synth,
	412	.build_id = perf_event__repipe_op2_synth,
	413	},
e558a5bd	414	.input_name = "-",
26a031e1	415	.samples = LIST_HEAD_INIT(inject.samples),
5ded57ac	416	};
e558a5bd	417	const char *output_name = "-";
5ded57ac ACM	418	const struct option options[] = {
	419	OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
	420	"Inject build-ids into the output stream"),
e558a5bd AV	421	OPT_STRING('i', "input", &inject.input_name, "file",
	422	"input file name"),
	423	OPT_STRING('o', "output", &output_name, "file",
	424	"output file name"),
26a031e1 AV	425	OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
	426	"Merge sched-stat and sched-switch for getting events "
	427	"where and how long tasks slept"),
5ded57ac ACM	428	OPT_INCR('v', "verbose", &verbose,
	429	"be more verbose (show build ids, etc)"),
	430	OPT_END()
	431	};
002439e8 ACM	432	const char * const inject_usage[] = {
	433	"perf inject [<options>]",
	434	NULL
	435	};
5ded57ac	436
002439e8	437	argc = parse_options(argc, argv, options, inject_usage, 0);
454c407e TZ	438
	439	/*
	440	* Any (unrecognized) arguments left?
	441	*/
	442	if (argc)
002439e8	443	usage_with_options(inject_usage, options);
454c407e	444
e558a5bd AV	445	if (!strcmp(output_name, "-")) {
	446	inject.pipe_output = 1;
	447	inject.output = STDOUT_FILENO;
	448	} else {
	449	inject.output = open(output_name, O_CREAT \| O_WRONLY \| O_TRUNC,
	450	S_IRUSR \| S_IWUSR);
	451	if (inject.output < 0) {
	452	perror("failed to create output file");
	453	return -1;
	454	}
	455	}
	456
454c407e TZ	457	if (symbol__init() < 0)
	458	return -1;
	459
5ded57ac	460	return __cmd_inject(&inject);
454c407e	461	}