[GitHub/mt8127/android_kernel_alcatel_ttab.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/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);
	}

	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);
	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->tool.sample	  = perf_event__inject_buildid;
		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->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 TZ	16	#include "util/debug.h"
	17
	18	#include "util/parse-options.h"
	19
26a031e1 AV	20	#include <linux/list.h>
26a031e1 AV	21
5ded57ac ACM	22	struct perf_inject {
	23	struct perf_tool tool;
	24	bool build_ids;
26a031e1	25	bool sched_stat;
e558a5bd AV	26	const char *input_name;
	27	int pipe_output,
	28	output;
	29	u64 bytes_written;
26a031e1 AV	30	struct list_head samples;
	31	};
	32
	33	struct event_entry {
	34	struct list_head node;
	35	u32 tid;
	36	union perf_event event[0];
5ded57ac	37	};
454c407e	38
e558a5bd	39	static int perf_event__repipe_synth(struct perf_tool *tool,
d20deb64	40	union perf_event *event,
1d037ca1	41	struct machine *machine __maybe_unused)
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	{
45694aa7	67	return perf_event__repipe_synth(tool, event, NULL);
743eb868 ACM	68	}
743eb868 ACM	69
45694aa7	70	static int perf_event__repipe_event_type_synth(struct perf_tool *tool,
743eb868 ACM	71	union perf_event *event)
743eb868 ACM	72	{
45694aa7	73	return perf_event__repipe_synth(tool, event, NULL);
743eb868 ACM	74	}
743eb868 ACM	75
d20deb64	76	static int perf_event__repipe_tracing_data_synth(union perf_event *event,
1d037ca1 IT	77	struct perf_session *session
1d037ca1 IT	78	__maybe_unused)
d20deb64	79	{
743eb868	80	return perf_event__repipe_synth(NULL, event, NULL);
d20deb64 ACM	81	}
d20deb64 ACM	82
10d0f086	83	static int perf_event__repipe_attr(union perf_event *event,
1d037ca1	84	struct perf_evlist **pevlist __maybe_unused)
10d0f086	85	{
1a1ed1ba SE	86	int ret;
	87	ret = perf_event__process_attr(event, pevlist);
	88	if (ret)
	89	return ret;
	90
d20deb64	91	return perf_event__repipe_synth(NULL, event, NULL);
10d0f086 ACM	92	}
10d0f086 ACM	93
45694aa7	94	static int perf_event__repipe(struct perf_tool *tool,
d20deb64	95	union perf_event *event,
1d037ca1	96	struct perf_sample *sample __maybe_unused,
743eb868	97	struct machine *machine)
640c03ce	98	{
45694aa7	99	return perf_event__repipe_synth(tool, event, machine);
640c03ce ACM	100	}
640c03ce ACM	101
26a031e1 AV	102	typedef int (inject_handler)(struct perf_tool tool,
	103	union perf_event *event,
	104	struct perf_sample *sample,
	105	struct perf_evsel *evsel,
	106	struct machine *machine);
	107
45694aa7	108	static int perf_event__repipe_sample(struct perf_tool *tool,
d20deb64	109	union perf_event *event,
26a031e1 AV	110	struct perf_sample *sample,
	111	struct perf_evsel *evsel,
	112	struct machine *machine)
9e69c210	113	{
26a031e1 AV	114	if (evsel->handler.func) {
	115	inject_handler f = evsel->handler.func;
	116	return f(tool, event, sample, evsel, machine);
	117	}
	118
45694aa7	119	return perf_event__repipe_synth(tool, event, machine);
9e69c210 ACM	120	}
9e69c210 ACM	121
45694aa7	122	static int perf_event__repipe_mmap(struct perf_tool *tool,
d20deb64	123	union perf_event *event,
8115d60c	124	struct perf_sample *sample,
743eb868	125	struct machine *machine)
454c407e TZ	126	{
	127	int err;
	128
45694aa7 ACM	129	err = perf_event__process_mmap(tool, event, sample, machine);
45694aa7 ACM	130	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	131
	132	return err;
	133	}
	134
f62d3f0f	135	static int perf_event__repipe_fork(struct perf_tool *tool,
d20deb64	136	union perf_event *event,
8115d60c	137	struct perf_sample *sample,
743eb868	138	struct machine *machine)
454c407e TZ	139	{
	140	int err;
	141
f62d3f0f	142	err = perf_event__process_fork(tool, event, sample, machine);
45694aa7	143	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	144
	145	return err;
	146	}
	147
8115d60c ACM	148	static int perf_event__repipe_tracing_data(union perf_event *event,
8115d60c ACM	149	struct perf_session *session)
454c407e TZ	150	{
	151	int err;
	152
743eb868	153	perf_event__repipe_synth(NULL, event, NULL);
8115d60c	154	err = perf_event__process_tracing_data(event, session);
454c407e TZ	155
	156	return err;
	157	}
	158
090f7204	159	static int dso__read_build_id(struct dso *self)
454c407e	160	{
090f7204 ACM	161	if (self->has_build_id)
090f7204 ACM	162	return 0;
454c407e	163
090f7204 ACM	164	if (filename__read_build_id(self->long_name, self->build_id,
	165	sizeof(self->build_id)) > 0) {
	166	self->has_build_id = true;
	167	return 0;
	168	}
454c407e	169
090f7204 ACM	170	return -1;
090f7204 ACM	171	}
454c407e	172
45694aa7	173	static int dso__inject_build_id(struct dso self, struct perf_tool tool,
743eb868	174	struct machine *machine)
090f7204 ACM	175	{
090f7204 ACM	176	u16 misc = PERF_RECORD_MISC_USER;
090f7204	177	int err;
454c407e	178
090f7204 ACM	179	if (dso__read_build_id(self) < 0) {
	180	pr_debug("no build_id found for %s\n", self->long_name);
	181	return -1;
	182	}
454c407e	183
090f7204 ACM	184	if (self->kernel)
090f7204 ACM	185	misc = PERF_RECORD_MISC_KERNEL;
454c407e	186
45694aa7	187	err = perf_event__synthesize_build_id(tool, self, misc, perf_event__repipe,
743eb868	188	machine);
090f7204 ACM	189	if (err) {
090f7204 ACM	190	pr_err("Can't synthesize build_id event for %s\n", self->long_name);
454c407e TZ	191	return -1;
	192	}
	193
	194	return 0;
	195	}
	196
45694aa7	197	static int perf_event__inject_buildid(struct perf_tool *tool,
d20deb64	198	union perf_event *event,
8115d60c	199	struct perf_sample *sample,
1d037ca1	200	struct perf_evsel *evsel __maybe_unused,
743eb868	201	struct machine *machine)
454c407e TZ	202	{
	203	struct addr_location al;
	204	struct thread *thread;
	205	u8 cpumode;
454c407e TZ	206
	207	cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
	208
743eb868	209	thread = machine__findnew_thread(machine, event->ip.pid);
454c407e TZ	210	if (thread == NULL) {
	211	pr_err("problem processing %d event, skipping it.\n",
	212	event->header.type);
454c407e TZ	213	goto repipe;
	214	}
	215
743eb868 ACM	216	thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
743eb868 ACM	217	event->ip.ip, &al);
454c407e TZ	218
	219	if (al.map != NULL) {
	220	if (!al.map->dso->hit) {
	221	al.map->dso->hit = 1;
090f7204	222	if (map__load(al.map, NULL) >= 0) {
45694aa7	223	dso__inject_build_id(al.map->dso, tool, machine);
090f7204 ACM	224	/*
	225	* If this fails, too bad, let the other side
	226	* account this as unresolved.
	227	*/
393be2e3	228	} else {
29a0fc9b	229	#ifdef LIBELF_SUPPORT
454c407e TZ	230	pr_warning("no symbols found in %s, maybe "
	231	"install a debug package?\n",
	232	al.map->dso->long_name);
393be2e3 NK	233	#endif
393be2e3 NK	234	}
454c407e TZ	235	}
	236	}
	237
	238	repipe:
45694aa7	239	perf_event__repipe(tool, event, sample, machine);
090f7204	240	return 0;
454c407e TZ	241	}
454c407e TZ	242
26a031e1 AV	243	static int perf_inject__sched_process_exit(struct perf_tool *tool,
	244	union perf_event *event __maybe_unused,
	245	struct perf_sample *sample,
	246	struct perf_evsel *evsel __maybe_unused,
	247	struct machine *machine __maybe_unused)
	248	{
	249	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	250	struct event_entry *ent;
	251
	252	list_for_each_entry(ent, &inject->samples, node) {
	253	if (sample->tid == ent->tid) {
	254	list_del_init(&ent->node);
	255	free(ent);
	256	break;
	257	}
	258	}
	259
	260	return 0;
	261	}
	262
	263	static int perf_inject__sched_switch(struct perf_tool *tool,
	264	union perf_event *event,
	265	struct perf_sample *sample,
	266	struct perf_evsel *evsel,
	267	struct machine *machine)
	268	{
	269	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	270	struct event_entry *ent;
	271
	272	perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
	273
	274	ent = malloc(event->header.size + sizeof(struct event_entry));
	275	if (ent == NULL) {
	276	color_fprintf(stderr, PERF_COLOR_RED,
	277	"Not enough memory to process sched switch event!");
	278	return -1;
	279	}
	280
	281	ent->tid = sample->tid;
	282	memcpy(&ent->event, event, event->header.size);
	283	list_add(&ent->node, &inject->samples);
	284	return 0;
	285	}
	286
	287	static int perf_inject__sched_stat(struct perf_tool *tool,
	288	union perf_event *event __maybe_unused,
	289	struct perf_sample *sample,
	290	struct perf_evsel *evsel,
	291	struct machine *machine)
	292	{
	293	struct event_entry *ent;
	294	union perf_event *event_sw;
	295	struct perf_sample sample_sw;
	296	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	297	u32 pid = perf_evsel__intval(evsel, sample, "pid");
	298
	299	list_for_each_entry(ent, &inject->samples, node) {
	300	if (pid == ent->tid)
	301	goto found;
	302	}
	303
	304	return 0;
	305	found:
	306	event_sw = &ent->event[0];
307	perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
308
309	sample_sw.period = sample->period;
310	sample_sw.time = sample->time;
311	perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
312	&sample_sw, false);
313	return perf_event__repipe(tool, event_sw, &sample_sw, machine);
314	}
315
454c407e TZ	316	extern volatile int session_done;
454c407e TZ	317
1d037ca1	318	static void sig_handler(int sig __maybe_unused)
454c407e TZ	319	{
	320	session_done = 1;
	321	}
	322
26a031e1 AV	323	static int perf_evsel__check_stype(struct perf_evsel *evsel,
	324	u64 sample_type, const char *sample_msg)
	325	{
	326	struct perf_event_attr *attr = &evsel->attr;
	327	const char *name = perf_evsel__name(evsel);
	328
	329	if (!(attr->sample_type & sample_type)) {
	330	pr_err("Samples for %s event do not have %s attribute set.",
	331	name, sample_msg);
	332	return -EINVAL;
	333	}
	334
	335	return 0;
	336	}
	337
5ded57ac	338	static int __cmd_inject(struct perf_inject *inject)
454c407e TZ	339	{
	340	struct perf_session *session;
	341	int ret = -EINVAL;
	342
	343	signal(SIGINT, sig_handler);
	344
5ded57ac ACM	345	if (inject->build_ids) {
	346	inject->tool.sample = perf_event__inject_buildid;
	347	inject->tool.mmap = perf_event__repipe_mmap;
f62d3f0f	348	inject->tool.fork = perf_event__repipe_fork;
5ded57ac	349	inject->tool.tracing_data = perf_event__repipe_tracing_data;
454c407e TZ	350	}
454c407e TZ	351
e558a5bd	352	session = perf_session__new(inject->input_name, O_RDONLY, false, true, &inject->tool);
454c407e TZ	353	if (session == NULL)
	354	return -ENOMEM;
	355
26a031e1 AV	356	if (inject->sched_stat) {
	357	struct perf_evsel *evsel;
	358
	359	inject->tool.ordered_samples = true;
	360
	361	list_for_each_entry(evsel, &session->evlist->entries, node) {
	362	const char *name = perf_evsel__name(evsel);
	363
	364	if (!strcmp(name, "sched:sched_switch")) {
	365	if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
	366	return -EINVAL;
	367
	368	evsel->handler.func = perf_inject__sched_switch;
	369	} else if (!strcmp(name, "sched:sched_process_exit"))
	370	evsel->handler.func = perf_inject__sched_process_exit;
	371	else if (!strncmp(name, "sched:sched_stat_", 17))
	372	evsel->handler.func = perf_inject__sched_stat;
	373	}
	374	}
	375
e558a5bd AV	376	if (!inject->pipe_output)
	377	lseek(inject->output, session->header.data_offset, SEEK_SET);
	378
5ded57ac	379	ret = perf_session__process_events(session, &inject->tool);
454c407e	380
e558a5bd AV	381	if (!inject->pipe_output) {
	382	session->header.data_size = inject->bytes_written;
	383	perf_session__write_header(session, session->evlist, inject->output, true);
	384	}
	385
454c407e TZ	386	perf_session__delete(session);
	387
	388	return ret;
	389	}
	390
1d037ca1	391	int cmd_inject(int argc, const char *argv, const char prefix __maybe_unused)
454c407e	392	{
5ded57ac ACM	393	struct perf_inject inject = {
	394	.tool = {
	395	.sample = perf_event__repipe_sample,
	396	.mmap = perf_event__repipe,
	397	.comm = perf_event__repipe,
	398	.fork = perf_event__repipe,
	399	.exit = perf_event__repipe,
	400	.lost = perf_event__repipe,
	401	.read = perf_event__repipe_sample,
	402	.throttle = perf_event__repipe,
	403	.unthrottle = perf_event__repipe,
	404	.attr = perf_event__repipe_attr,
	405	.event_type = perf_event__repipe_event_type_synth,
	406	.tracing_data = perf_event__repipe_tracing_data_synth,
	407	.build_id = perf_event__repipe_op2_synth,
	408	},
e558a5bd	409	.input_name = "-",
26a031e1	410	.samples = LIST_HEAD_INIT(inject.samples),
5ded57ac	411	};
e558a5bd	412	const char *output_name = "-";
5ded57ac ACM	413	const struct option options[] = {
	414	OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
	415	"Inject build-ids into the output stream"),
e558a5bd AV	416	OPT_STRING('i', "input", &inject.input_name, "file",
	417	"input file name"),
	418	OPT_STRING('o', "output", &output_name, "file",
	419	"output file name"),
26a031e1 AV	420	OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
	421	"Merge sched-stat and sched-switch for getting events "
	422	"where and how long tasks slept"),
5ded57ac ACM	423	OPT_INCR('v', "verbose", &verbose,
	424	"be more verbose (show build ids, etc)"),
	425	OPT_END()
	426	};
002439e8 ACM	427	const char * const inject_usage[] = {
	428	"perf inject [<options>]",
	429	NULL
	430	};
5ded57ac	431
002439e8	432	argc = parse_options(argc, argv, options, inject_usage, 0);
454c407e TZ	433
	434	/*
	435	* Any (unrecognized) arguments left?
	436	*/
	437	if (argc)
002439e8	438	usage_with_options(inject_usage, options);
454c407e	439
e558a5bd AV	440	if (!strcmp(output_name, "-")) {
	441	inject.pipe_output = 1;
	442	inject.output = STDOUT_FILENO;
	443	} else {
	444	inject.output = open(output_name, O_CREAT \| O_WRONLY \| O_TRUNC,
	445	S_IRUSR \| S_IWUSR);
	446	if (inject.output < 0) {
	447	perror("failed to create output file");
	448	return -1;
	449	}
	450	}
	451
454c407e TZ	452	if (symbol__init() < 0)
	453	return -1;
	454
5ded57ac	455	return __cmd_inject(&inject);
454c407e	456	}