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

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

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

#include "util/parse-options.h"

#include <linux/list.h>

struct perf_inject {
	struct perf_tool	tool;
	struct perf_session	*session;
	bool			build_ids;
	bool			sched_stat;
	const char		*input_name;
	struct perf_data_file	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);
	ssize_t size;

	size = perf_data_file__write(&inject->output, event,
				     event->header.size);
	if (size < 0)
		return -errno;

	inject->bytes_written += size;
	return 0;
}

static int perf_event__repipe_oe_synth(struct perf_tool *tool,
				       union perf_event *event,
				       struct ordered_events *oe __maybe_unused)
{
	return perf_event__repipe_synth(tool, event);
}

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

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

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

	if (!inject->output.is_pipe)
		return 0;

	return perf_event__repipe_synth(tool, event);
}

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

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

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

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

	return perf_event__repipe_synth(tool, event);
}

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

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

	return err;
}

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

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

	return err;
}

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

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

	return err;
}

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

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

	return err;
}

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

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

	return -1;
}

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

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

	if (dso->kernel)
		misc = PERF_RECORD_MISC_KERNEL;

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

	return 0;
}

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

	cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;

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

	thread__find_addr_map(thread, 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.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)
{
	int ret = -EINVAL;
	struct perf_session *session = inject->session;
	struct perf_data_file *file_out = &inject->output;
	int fd = perf_data_file__fd(file_out);

	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;
	}

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

		evlist__for_each(session->evlist, evsel) {
			const char *name = perf_evsel__name(evsel);

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

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

	if (!file_out->is_pipe)
		lseek(fd, session->header.data_offset, SEEK_SET);

	ret = perf_session__process_events(session);

	if (!file_out->is_pipe) {
		if (inject->build_ids)
			perf_header__set_feat(&session->header,
					      HEADER_BUILD_ID);
		session->header.data_size = inject->bytes_written;
		perf_session__write_header(session, session->evlist, fd, true);
	}

	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_oe_synth,
			.build_id	= perf_event__repipe_op2_synth,
			.id_index	= perf_event__repipe_op2_synth,
		},
		.input_name  = "-",
		.samples = LIST_HEAD_INIT(inject.samples),
		.output = {
			.path = "-",
			.mode = PERF_DATA_MODE_WRITE,
		},
	};
	struct perf_data_file file = {
		.mode = PERF_DATA_MODE_READ,
	};
	int ret;

	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", &inject.output.path, "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_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
			   "kallsyms pathname"),
		OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
		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 (perf_data_file__open(&inject.output)) {
		perror("failed to create output file");
		return -1;
	}

	inject.tool.ordered_events = inject.sched_stat;

	file.path = inject.input_name;
	inject.session = perf_session__new(&file, true, &inject.tool);
	if (inject.session == NULL)
		return -1;

	if (symbol__init(&inject.session->header.env) < 0)
		return -1;

	ret = __cmd_inject(&inject);

	perf_session__delete(inject.session);

	return ret;
}
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	24	struct perf_inject {
3406912c	25	struct perf_tool tool;
1cb8bdcc	26	struct perf_session *session;
3406912c JO	27	bool build_ids;
	28	bool sched_stat;
	29	const char *input_name;
	30	struct perf_data_file output;
	31	u64 bytes_written;
	32	struct list_head samples;
26a031e1 AV	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);
3406912c	45	ssize_t size;
454c407e	46
3406912c JO	47	size = perf_data_file__write(&inject->output, event,
	48	event->header.size);
	49	if (size < 0)
	50	return -errno;
454c407e	51
3406912c	52	inject->bytes_written += size;
454c407e TZ	53	return 0;
	54	}
	55
d704ebda ACM	56	static int perf_event__repipe_oe_synth(struct perf_tool *tool,
	57	union perf_event *event,
	58	struct ordered_events *oe __maybe_unused)
	59	{
	60	return perf_event__repipe_synth(tool, event);
	61	}
	62
45694aa7	63	static int perf_event__repipe_op2_synth(struct perf_tool *tool,
743eb868	64	union perf_event *event,
1d037ca1 IT	65	struct perf_session *session
1d037ca1 IT	66	__maybe_unused)
743eb868	67	{
63c2c9f8	68	return perf_event__repipe_synth(tool, event);
743eb868 ACM	69	}
743eb868 ACM	70
47c3d109 AH	71	static int perf_event__repipe_attr(struct perf_tool *tool,
	72	union perf_event *event,
	73	struct perf_evlist **pevlist)
10d0f086	74	{
89c97d93 AH	75	struct perf_inject *inject = container_of(tool, struct perf_inject,
89c97d93 AH	76	tool);
1a1ed1ba	77	int ret;
47c3d109 AH	78
47c3d109 AH	79	ret = perf_event__process_attr(tool, event, pevlist);
1a1ed1ba SE	80	if (ret)
	81	return ret;
	82
a261e4a0	83	if (!inject->output.is_pipe)
89c97d93 AH	84	return 0;
89c97d93 AH	85
47c3d109	86	return perf_event__repipe_synth(tool, event);
10d0f086 ACM	87	}
10d0f086 ACM	88
45694aa7	89	static int perf_event__repipe(struct perf_tool *tool,
d20deb64	90	union perf_event *event,
1d037ca1	91	struct perf_sample *sample __maybe_unused,
63c2c9f8	92	struct machine *machine __maybe_unused)
640c03ce	93	{
63c2c9f8	94	return perf_event__repipe_synth(tool, event);
640c03ce ACM	95	}
640c03ce ACM	96
26a031e1 AV	97	typedef int (inject_handler)(struct perf_tool tool,
	98	union perf_event *event,
	99	struct perf_sample *sample,
	100	struct perf_evsel *evsel,
	101	struct machine *machine);
	102
45694aa7	103	static int perf_event__repipe_sample(struct perf_tool *tool,
d20deb64	104	union perf_event *event,
26a031e1 AV	105	struct perf_sample *sample,
	106	struct perf_evsel *evsel,
	107	struct machine *machine)
9e69c210	108	{
744a9719 ACM	109	if (evsel->handler) {
744a9719 ACM	110	inject_handler f = evsel->handler;
26a031e1 AV	111	return f(tool, event, sample, evsel, machine);
	112	}
	113
54a3cf59 AV	114	build_id__mark_dso_hit(tool, event, sample, evsel, machine);
54a3cf59 AV	115
63c2c9f8	116	return perf_event__repipe_synth(tool, event);
9e69c210 ACM	117	}
9e69c210 ACM	118
45694aa7	119	static int perf_event__repipe_mmap(struct perf_tool *tool,
d20deb64	120	union perf_event *event,
8115d60c	121	struct perf_sample *sample,
743eb868	122	struct machine *machine)
454c407e TZ	123	{
	124	int err;
	125
45694aa7 ACM	126	err = perf_event__process_mmap(tool, event, sample, machine);
45694aa7 ACM	127	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	128
	129	return err;
	130	}
	131
5c5e854b SE	132	static int perf_event__repipe_mmap2(struct perf_tool *tool,
	133	union perf_event *event,
	134	struct perf_sample *sample,
	135	struct machine *machine)
	136	{
	137	int err;
	138
	139	err = perf_event__process_mmap2(tool, event, sample, machine);
	140	perf_event__repipe(tool, event, sample, machine);
	141
	142	return err;
	143	}
	144
f62d3f0f	145	static int perf_event__repipe_fork(struct perf_tool *tool,
d20deb64	146	union perf_event *event,
8115d60c	147	struct perf_sample *sample,
743eb868	148	struct machine *machine)
454c407e TZ	149	{
	150	int err;
	151
f62d3f0f	152	err = perf_event__process_fork(tool, event, sample, machine);
45694aa7	153	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	154
	155	return err;
	156	}
	157
47c3d109 AH	158	static int perf_event__repipe_tracing_data(struct perf_tool *tool,
47c3d109 AH	159	union perf_event *event,
8115d60c	160	struct perf_session *session)
454c407e TZ	161	{
	162	int err;
	163
47c3d109 AH	164	perf_event__repipe_synth(tool, event);
47c3d109 AH	165	err = perf_event__process_tracing_data(tool, event, session);
454c407e TZ	166
	167	return err;
	168	}
	169
c824c433	170	static int dso__read_build_id(struct dso *dso)
454c407e	171	{
c824c433	172	if (dso->has_build_id)
090f7204	173	return 0;
454c407e	174
c824c433 ACM	175	if (filename__read_build_id(dso->long_name, dso->build_id,
	176	sizeof(dso->build_id)) > 0) {
	177	dso->has_build_id = true;
090f7204 ACM	178	return 0;
090f7204 ACM	179	}
454c407e	180
090f7204 ACM	181	return -1;
090f7204 ACM	182	}
454c407e	183
c824c433	184	static int dso__inject_build_id(struct dso dso, struct perf_tool tool,
743eb868	185	struct machine *machine)
090f7204 ACM	186	{
090f7204 ACM	187	u16 misc = PERF_RECORD_MISC_USER;
090f7204	188	int err;
454c407e	189
c824c433 ACM	190	if (dso__read_build_id(dso) < 0) {
c824c433 ACM	191	pr_debug("no build_id found for %s\n", dso->long_name);
090f7204 ACM	192	return -1;
090f7204 ACM	193	}
454c407e	194
c824c433	195	if (dso->kernel)
090f7204	196	misc = PERF_RECORD_MISC_KERNEL;
454c407e	197
c824c433	198	err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
743eb868	199	machine);
090f7204	200	if (err) {
c824c433	201	pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
454c407e TZ	202	return -1;
	203	}
	204
	205	return 0;
	206	}
	207
45694aa7	208	static int perf_event__inject_buildid(struct perf_tool *tool,
d20deb64	209	union perf_event *event,
8115d60c	210	struct perf_sample *sample,
1d037ca1	211	struct perf_evsel *evsel __maybe_unused,
743eb868	212	struct machine *machine)
454c407e TZ	213	{
	214	struct addr_location al;
	215	struct thread *thread;
	216	u8 cpumode;
454c407e TZ	217
	218	cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
	219
13ce34df	220	thread = machine__findnew_thread(machine, sample->pid, sample->tid);
454c407e TZ	221	if (thread == NULL) {
	222	pr_err("problem processing %d event, skipping it.\n",
	223	event->header.type);
454c407e TZ	224	goto repipe;
	225	}
	226
bb871a9c	227	thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, &al);
454c407e TZ	228
	229	if (al.map != NULL) {
	230	if (!al.map->dso->hit) {
	231	al.map->dso->hit = 1;
090f7204	232	if (map__load(al.map, NULL) >= 0) {
45694aa7	233	dso__inject_build_id(al.map->dso, tool, machine);
090f7204 ACM	234	/*
	235	* If this fails, too bad, let the other side
	236	* account this as unresolved.
	237	*/
393be2e3	238	} else {
89fe808a	239	#ifdef HAVE_LIBELF_SUPPORT
454c407e TZ	240	pr_warning("no symbols found in %s, maybe "
	241	"install a debug package?\n",
	242	al.map->dso->long_name);
393be2e3 NK	243	#endif
393be2e3 NK	244	}
454c407e TZ	245	}
	246	}
	247
	248	repipe:
45694aa7	249	perf_event__repipe(tool, event, sample, machine);
090f7204	250	return 0;
454c407e TZ	251	}
454c407e TZ	252
26a031e1 AV	253	static int perf_inject__sched_process_exit(struct perf_tool *tool,
	254	union perf_event *event __maybe_unused,
	255	struct perf_sample *sample,
	256	struct perf_evsel *evsel __maybe_unused,
	257	struct machine *machine __maybe_unused)
	258	{
	259	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	260	struct event_entry *ent;
	261
	262	list_for_each_entry(ent, &inject->samples, node) {
	263	if (sample->tid == ent->tid) {
	264	list_del_init(&ent->node);
	265	free(ent);
	266	break;
	267	}
	268	}
	269
	270	return 0;
	271	}
	272
	273	static int perf_inject__sched_switch(struct perf_tool *tool,
	274	union perf_event *event,
	275	struct perf_sample *sample,
	276	struct perf_evsel *evsel,
	277	struct machine *machine)
	278	{
	279	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	280	struct event_entry *ent;
	281
	282	perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
	283
	284	ent = malloc(event->header.size + sizeof(struct event_entry));
	285	if (ent == NULL) {
	286	color_fprintf(stderr, PERF_COLOR_RED,
	287	"Not enough memory to process sched switch event!");
	288	return -1;
	289	}
	290
	291	ent->tid = sample->tid;
	292	memcpy(&ent->event, event, event->header.size);
	293	list_add(&ent->node, &inject->samples);
	294	return 0;
	295	}
	296
	297	static int perf_inject__sched_stat(struct perf_tool *tool,
	298	union perf_event *event __maybe_unused,
	299	struct perf_sample *sample,
	300	struct perf_evsel *evsel,
	301	struct machine *machine)
	302	{
	303	struct event_entry *ent;
	304	union perf_event *event_sw;
	305	struct perf_sample sample_sw;
	306	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
	307	u32 pid = perf_evsel__intval(evsel, sample, "pid");
	308
	309	list_for_each_entry(ent, &inject->samples, node) {
	310	if (pid == ent->tid)
	311	goto found;
	312	}
	313
	314	return 0;
	315	found:
	316	event_sw = &ent->event[0];
317	perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
318
319	sample_sw.period = sample->period;
320	sample_sw.time = sample->time;
321	perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
d03f2170 AH	322	evsel->attr.read_format, &sample_sw,
d03f2170 AH	323	false);
54a3cf59	324	build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
26a031e1 AV	325	return perf_event__repipe(tool, event_sw, &sample_sw, machine);
	326	}
	327
1d037ca1	328	static void sig_handler(int sig __maybe_unused)
454c407e TZ	329	{
	330	session_done = 1;
	331	}
	332
26a031e1 AV	333	static int perf_evsel__check_stype(struct perf_evsel *evsel,
	334	u64 sample_type, const char *sample_msg)
	335	{
	336	struct perf_event_attr *attr = &evsel->attr;
	337	const char *name = perf_evsel__name(evsel);
	338
	339	if (!(attr->sample_type & sample_type)) {
	340	pr_err("Samples for %s event do not have %s attribute set.",
	341	name, sample_msg);
	342	return -EINVAL;
	343	}
	344
	345	return 0;
	346	}
	347
5ded57ac	348	static int __cmd_inject(struct perf_inject *inject)
454c407e	349	{
454c407e	350	int ret = -EINVAL;
1cb8bdcc	351	struct perf_session *session = inject->session;
3406912c	352	struct perf_data_file *file_out = &inject->output;
42aa276f	353	int fd = perf_data_file__fd(file_out);
454c407e TZ	354
	355	signal(SIGINT, sig_handler);
	356
54a3cf59	357	if (inject->build_ids \|\| inject->sched_stat) {
5ded57ac	358	inject->tool.mmap = perf_event__repipe_mmap;
5c5e854b	359	inject->tool.mmap2 = perf_event__repipe_mmap2;
f62d3f0f	360	inject->tool.fork = perf_event__repipe_fork;
5ded57ac	361	inject->tool.tracing_data = perf_event__repipe_tracing_data;
454c407e TZ	362	}
454c407e TZ	363
54a3cf59 AV	364	if (inject->build_ids) {
	365	inject->tool.sample = perf_event__inject_buildid;
	366	} else if (inject->sched_stat) {
26a031e1 AV	367	struct perf_evsel *evsel;
26a031e1 AV	368
0050f7aa	369	evlist__for_each(session->evlist, evsel) {
26a031e1 AV	370	const char *name = perf_evsel__name(evsel);
	371
	372	if (!strcmp(name, "sched:sched_switch")) {
	373	if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
	374	return -EINVAL;
	375
744a9719	376	evsel->handler = perf_inject__sched_switch;
26a031e1	377	} else if (!strcmp(name, "sched:sched_process_exit"))
744a9719	378	evsel->handler = perf_inject__sched_process_exit;
26a031e1	379	else if (!strncmp(name, "sched:sched_stat_", 17))
744a9719	380	evsel->handler = perf_inject__sched_stat;
26a031e1 AV	381	}
	382	}
	383
3406912c	384	if (!file_out->is_pipe)
42aa276f	385	lseek(fd, session->header.data_offset, SEEK_SET);
e558a5bd	386
b7b61cbe	387	ret = perf_session__process_events(session);
454c407e	388
3406912c	389	if (!file_out->is_pipe) {
e38b43c3 AH	390	if (inject->build_ids)
	391	perf_header__set_feat(&session->header,
	392	HEADER_BUILD_ID);
e558a5bd	393	session->header.data_size = inject->bytes_written;
42aa276f	394	perf_session__write_header(session, session->evlist, fd, true);
e558a5bd AV	395	}
e558a5bd AV	396
454c407e TZ	397	return ret;
	398	}
	399
1d037ca1	400	int cmd_inject(int argc, const char *argv, const char prefix __maybe_unused)
454c407e	401	{
5ded57ac ACM	402	struct perf_inject inject = {
	403	.tool = {
	404	.sample = perf_event__repipe_sample,
	405	.mmap = perf_event__repipe,
5c5e854b	406	.mmap2 = perf_event__repipe,
5ded57ac ACM	407	.comm = perf_event__repipe,
	408	.fork = perf_event__repipe,
	409	.exit = perf_event__repipe,
	410	.lost = perf_event__repipe,
	411	.read = perf_event__repipe_sample,
	412	.throttle = perf_event__repipe,
	413	.unthrottle = perf_event__repipe,
	414	.attr = perf_event__repipe_attr,
47c3d109	415	.tracing_data = perf_event__repipe_op2_synth,
d704ebda	416	.finished_round = perf_event__repipe_oe_synth,
5ded57ac	417	.build_id = perf_event__repipe_op2_synth,
3c659eed	418	.id_index = perf_event__repipe_op2_synth,
5ded57ac	419	},
e558a5bd	420	.input_name = "-",
26a031e1	421	.samples = LIST_HEAD_INIT(inject.samples),
3406912c JO	422	.output = {
	423	.path = "-",
	424	.mode = PERF_DATA_MODE_WRITE,
	425	},
5ded57ac	426	};
1cb8bdcc NK	427	struct perf_data_file file = {
	428	.mode = PERF_DATA_MODE_READ,
	429	};
	430	int ret;
	431
5ded57ac ACM	432	const struct option options[] = {
	433	OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
	434	"Inject build-ids into the output stream"),
e558a5bd AV	435	OPT_STRING('i', "input", &inject.input_name, "file",
e558a5bd AV	436	"input file name"),
3406912c	437	OPT_STRING('o', "output", &inject.output.path, "file",
e558a5bd	438	"output file name"),
26a031e1 AV	439	OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
	440	"Merge sched-stat and sched-switch for getting events "
	441	"where and how long tasks slept"),
5ded57ac ACM	442	OPT_INCR('v', "verbose", &verbose,
5ded57ac ACM	443	"be more verbose (show build ids, etc)"),
a7a2b8b4 AH	444	OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
a7a2b8b4 AH	445	"kallsyms pathname"),
ccaa474c	446	OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
5ded57ac ACM	447	OPT_END()
5ded57ac ACM	448	};
002439e8 ACM	449	const char * const inject_usage[] = {
	450	"perf inject [<options>]",
	451	NULL
	452	};
5ded57ac	453
002439e8	454	argc = parse_options(argc, argv, options, inject_usage, 0);
454c407e TZ	455
	456	/*
	457	* Any (unrecognized) arguments left?
	458	*/
	459	if (argc)
002439e8	460	usage_with_options(inject_usage, options);
454c407e	461
3406912c JO	462	if (perf_data_file__open(&inject.output)) {
	463	perror("failed to create output file");
	464	return -1;
e558a5bd AV	465	}
e558a5bd AV	466
b7b61cbe ACM	467	inject.tool.ordered_events = inject.sched_stat;
b7b61cbe ACM	468
1cb8bdcc NK	469	file.path = inject.input_name;
	470	inject.session = perf_session__new(&file, true, &inject.tool);
	471	if (inject.session == NULL)
52e02834	472	return -1;
1cb8bdcc	473
0a7e6d1b	474	if (symbol__init(&inject.session->header.env) < 0)
454c407e TZ	475	return -1;
454c407e TZ	476
1cb8bdcc NK	477	ret = __cmd_inject(&inject);
	478
	479	perf_session__delete(inject.session);
	480
	481	return ret;
454c407e	482	}