[mirror_ubuntu-hirsute-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;
	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_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->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.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,
	};
	struct perf_data_file *file_out = &inject->output;

	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;

		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(file_out->fd, session->header.data_offset, SEEK_SET);

	ret = perf_session__process_events(session, &inject->tool);

	if (!file_out->is_pipe) {
		session->header.data_size = inject->bytes_written;
		perf_session__write_header(session, session->evlist, file_out->fd, 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),
		.output = {
			.path = "-",
			.mode = PERF_DATA_MODE_WRITE,
		},
	};
	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_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;
	}

	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	24	struct perf_inject {
3406912c JO	25	struct perf_tool tool;
	26	bool build_ids;
	27	bool sched_stat;
	28	const char *input_name;
	29	struct perf_data_file output;
	30	u64 bytes_written;
	31	struct list_head samples;
26a031e1 AV	32	};
	33
	34	struct event_entry {
	35	struct list_head node;
	36	u32 tid;
	37	union perf_event event[0];
5ded57ac	38	};
454c407e	39
e558a5bd	40	static int perf_event__repipe_synth(struct perf_tool *tool,
63c2c9f8	41	union perf_event *event)
454c407e	42	{
e558a5bd	43	struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
3406912c	44	ssize_t size;
454c407e	45
3406912c JO	46	size = perf_data_file__write(&inject->output, event,
	47	event->header.size);
	48	if (size < 0)
	49	return -errno;
454c407e	50
3406912c	51	inject->bytes_written += size;
454c407e TZ	52	return 0;
	53	}
	54
45694aa7	55	static int perf_event__repipe_op2_synth(struct perf_tool *tool,
743eb868	56	union perf_event *event,
1d037ca1 IT	57	struct perf_session *session
1d037ca1 IT	58	__maybe_unused)
743eb868	59	{
63c2c9f8	60	return perf_event__repipe_synth(tool, event);
743eb868 ACM	61	}
743eb868 ACM	62
47c3d109 AH	63	static int perf_event__repipe_attr(struct perf_tool *tool,
	64	union perf_event *event,
	65	struct perf_evlist **pevlist)
10d0f086	66	{
89c97d93 AH	67	struct perf_inject *inject = container_of(tool, struct perf_inject,
89c97d93 AH	68	tool);
1a1ed1ba	69	int ret;
47c3d109 AH	70
47c3d109 AH	71	ret = perf_event__process_attr(tool, event, pevlist);
1a1ed1ba SE	72	if (ret)
	73	return ret;
	74
3406912c	75	if (&inject->output.is_pipe)
89c97d93 AH	76	return 0;
89c97d93 AH	77
47c3d109	78	return perf_event__repipe_synth(tool, event);
10d0f086 ACM	79	}
10d0f086 ACM	80
45694aa7	81	static int perf_event__repipe(struct perf_tool *tool,
d20deb64	82	union perf_event *event,
1d037ca1	83	struct perf_sample *sample __maybe_unused,
63c2c9f8	84	struct machine *machine __maybe_unused)
640c03ce	85	{
63c2c9f8	86	return perf_event__repipe_synth(tool, event);
640c03ce ACM	87	}
640c03ce ACM	88
26a031e1 AV	89	typedef int (inject_handler)(struct perf_tool tool,
	90	union perf_event *event,
	91	struct perf_sample *sample,
	92	struct perf_evsel *evsel,
	93	struct machine *machine);
	94
45694aa7	95	static int perf_event__repipe_sample(struct perf_tool *tool,
d20deb64	96	union perf_event *event,
26a031e1 AV	97	struct perf_sample *sample,
	98	struct perf_evsel *evsel,
	99	struct machine *machine)
9e69c210	100	{
744a9719 ACM	101	if (evsel->handler) {
744a9719 ACM	102	inject_handler f = evsel->handler;
26a031e1 AV	103	return f(tool, event, sample, evsel, machine);
	104	}
	105
54a3cf59 AV	106	build_id__mark_dso_hit(tool, event, sample, evsel, machine);
54a3cf59 AV	107
63c2c9f8	108	return perf_event__repipe_synth(tool, event);
9e69c210 ACM	109	}
9e69c210 ACM	110
45694aa7	111	static int perf_event__repipe_mmap(struct perf_tool *tool,
d20deb64	112	union perf_event *event,
8115d60c	113	struct perf_sample *sample,
743eb868	114	struct machine *machine)
454c407e TZ	115	{
	116	int err;
	117
45694aa7 ACM	118	err = perf_event__process_mmap(tool, event, sample, machine);
45694aa7 ACM	119	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	120
	121	return err;
	122	}
	123
5c5e854b SE	124	static int perf_event__repipe_mmap2(struct perf_tool *tool,
	125	union perf_event *event,
	126	struct perf_sample *sample,
	127	struct machine *machine)
	128	{
	129	int err;
	130
	131	err = perf_event__process_mmap2(tool, event, sample, machine);
	132	perf_event__repipe(tool, event, sample, machine);
	133
	134	return err;
	135	}
	136
f62d3f0f	137	static int perf_event__repipe_fork(struct perf_tool *tool,
d20deb64	138	union perf_event *event,
8115d60c	139	struct perf_sample *sample,
743eb868	140	struct machine *machine)
454c407e TZ	141	{
	142	int err;
	143
f62d3f0f	144	err = perf_event__process_fork(tool, event, sample, machine);
45694aa7	145	perf_event__repipe(tool, event, sample, machine);
454c407e TZ	146
	147	return err;
	148	}
	149
47c3d109 AH	150	static int perf_event__repipe_tracing_data(struct perf_tool *tool,
47c3d109 AH	151	union perf_event *event,
8115d60c	152	struct perf_session *session)
454c407e TZ	153	{
	154	int err;
	155
47c3d109 AH	156	perf_event__repipe_synth(tool, event);
47c3d109 AH	157	err = perf_event__process_tracing_data(tool, event, session);
454c407e TZ	158
	159	return err;
	160	}
	161
c824c433	162	static int dso__read_build_id(struct dso *dso)
454c407e	163	{
c824c433	164	if (dso->has_build_id)
090f7204	165	return 0;
454c407e	166
c824c433 ACM	167	if (filename__read_build_id(dso->long_name, dso->build_id,
	168	sizeof(dso->build_id)) > 0) {
	169	dso->has_build_id = true;
090f7204 ACM	170	return 0;
090f7204 ACM	171	}
454c407e	172
090f7204 ACM	173	return -1;
090f7204 ACM	174	}
454c407e	175
c824c433	176	static int dso__inject_build_id(struct dso dso, 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
c824c433 ACM	182	if (dso__read_build_id(dso) < 0) {
c824c433 ACM	183	pr_debug("no build_id found for %s\n", dso->long_name);
090f7204 ACM	184	return -1;
090f7204 ACM	185	}
454c407e	186
c824c433	187	if (dso->kernel)
090f7204	188	misc = PERF_RECORD_MISC_KERNEL;
454c407e	189
c824c433	190	err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
743eb868	191	machine);
090f7204	192	if (err) {
c824c433	193	pr_err("Can't synthesize build_id event for %s\n", dso->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
ef89325f	212	thread = machine__findnew_thread(machine, sample->pid, sample->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	219	thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
ef89325f	220	sample->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 {
89fe808a	232	#ifdef HAVE_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,
d03f2170 AH	315	evsel->attr.read_format, &sample_sw,
d03f2170 AH	316	false);
54a3cf59	317	build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
26a031e1 AV	318	return perf_event__repipe(tool, event_sw, &sample_sw, machine);
	319	}
	320
1d037ca1	321	static void sig_handler(int sig __maybe_unused)
454c407e TZ	322	{
	323	session_done = 1;
	324	}
	325
26a031e1 AV	326	static int perf_evsel__check_stype(struct perf_evsel *evsel,
	327	u64 sample_type, const char *sample_msg)
	328	{
	329	struct perf_event_attr *attr = &evsel->attr;
	330	const char *name = perf_evsel__name(evsel);
	331
	332	if (!(attr->sample_type & sample_type)) {
	333	pr_err("Samples for %s event do not have %s attribute set.",
	334	name, sample_msg);
	335	return -EINVAL;
	336	}
	337
	338	return 0;
	339	}
	340
5ded57ac	341	static int __cmd_inject(struct perf_inject *inject)
454c407e TZ	342	{
	343	struct perf_session *session;
	344	int ret = -EINVAL;
f5fc1412 JO	345	struct perf_data_file file = {
	346	.path = inject->input_name,
	347	.mode = PERF_DATA_MODE_READ,
	348	};
3406912c	349	struct perf_data_file *file_out = &inject->output;
454c407e TZ	350
	351	signal(SIGINT, sig_handler);
	352
54a3cf59	353	if (inject->build_ids \|\| inject->sched_stat) {
5ded57ac	354	inject->tool.mmap = perf_event__repipe_mmap;
5c5e854b	355	inject->tool.mmap2 = perf_event__repipe_mmap2;
f62d3f0f	356	inject->tool.fork = perf_event__repipe_fork;
5ded57ac	357	inject->tool.tracing_data = perf_event__repipe_tracing_data;
454c407e TZ	358	}
454c407e TZ	359
f5fc1412	360	session = perf_session__new(&file, true, &inject->tool);
454c407e TZ	361	if (session == NULL)
	362	return -ENOMEM;
	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;
	368
	369	inject->tool.ordered_samples = true;
	370
0050f7aa	371	evlist__for_each(session->evlist, evsel) {
26a031e1 AV	372	const char *name = perf_evsel__name(evsel);
	373
	374	if (!strcmp(name, "sched:sched_switch")) {
	375	if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
	376	return -EINVAL;
	377
744a9719	378	evsel->handler = perf_inject__sched_switch;
26a031e1	379	} else if (!strcmp(name, "sched:sched_process_exit"))
744a9719	380	evsel->handler = perf_inject__sched_process_exit;
26a031e1	381	else if (!strncmp(name, "sched:sched_stat_", 17))
744a9719	382	evsel->handler = perf_inject__sched_stat;
26a031e1 AV	383	}
	384	}
	385
3406912c JO	386	if (!file_out->is_pipe)
3406912c JO	387	lseek(file_out->fd, session->header.data_offset, SEEK_SET);
e558a5bd	388
5ded57ac	389	ret = perf_session__process_events(session, &inject->tool);
454c407e	390
3406912c	391	if (!file_out->is_pipe) {
e558a5bd	392	session->header.data_size = inject->bytes_written;
3406912c	393	perf_session__write_header(session, session->evlist, file_out->fd, true);
e558a5bd AV	394	}
e558a5bd AV	395
454c407e TZ	396	perf_session__delete(session);
	397
	398	return ret;
	399	}
	400
1d037ca1	401	int cmd_inject(int argc, const char *argv, const char prefix __maybe_unused)
454c407e	402	{
5ded57ac ACM	403	struct perf_inject inject = {
	404	.tool = {
	405	.sample = perf_event__repipe_sample,
	406	.mmap = perf_event__repipe,
5c5e854b	407	.mmap2 = perf_event__repipe,
5ded57ac ACM	408	.comm = perf_event__repipe,
	409	.fork = perf_event__repipe,
	410	.exit = perf_event__repipe,
	411	.lost = perf_event__repipe,
	412	.read = perf_event__repipe_sample,
	413	.throttle = perf_event__repipe,
	414	.unthrottle = perf_event__repipe,
	415	.attr = perf_event__repipe_attr,
47c3d109	416	.tracing_data = perf_event__repipe_op2_synth,
a609bda7	417	.finished_round = perf_event__repipe_op2_synth,
5ded57ac ACM	418	.build_id = perf_event__repipe_op2_synth,
5ded57ac ACM	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 ACM	426	};
	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",
e558a5bd AV	431	"input file name"),
3406912c	432	OPT_STRING('o', "output", &inject.output.path, "file",
e558a5bd	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
3406912c JO	454	if (perf_data_file__open(&inject.output)) {
	455	perror("failed to create output file");
	456	return -1;
e558a5bd AV	457	}
e558a5bd AV	458
454c407e TZ	459	if (symbol__init() < 0)
	460	return -1;
	461
5ded57ac	462	return __cmd_inject(&inject);
454c407e	463	}