4 * Builtin inject command: Examine the live mode (stdin) event stream
5 * and repipe it to stdout while optionally injecting additional
11 #include "util/color.h"
12 #include "util/evlist.h"
13 #include "util/evsel.h"
14 #include "util/session.h"
15 #include "util/tool.h"
16 #include "util/debug.h"
17 #include "util/build-id.h"
19 #include "util/parse-options.h"
21 #include <linux/list.h>
24 struct perf_tool tool;
27 const char *input_name;
31 struct list_head samples;
35 struct list_head node;
37 union perf_event event[0];
40 static int perf_event__repipe_synth(struct perf_tool *tool,
41 union perf_event *event)
43 struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
47 size = event->header.size;
50 int ret = write(inject->output, buf, size);
56 inject->bytes_written += ret;
62 static int perf_event__repipe_op2_synth(struct perf_tool *tool,
63 union perf_event *event,
64 struct perf_session *session
67 return perf_event__repipe_synth(tool, event);
70 static int perf_event__repipe_attr(struct perf_tool *tool,
71 union perf_event *event,
72 struct perf_evlist **pevlist)
76 ret = perf_event__process_attr(tool, event, pevlist);
80 return perf_event__repipe_synth(tool, event);
83 static int perf_event__repipe(struct perf_tool *tool,
84 union perf_event *event,
85 struct perf_sample *sample __maybe_unused,
86 struct machine *machine __maybe_unused)
88 return perf_event__repipe_synth(tool, event);
91 typedef int (*inject_handler)(struct perf_tool *tool,
92 union perf_event *event,
93 struct perf_sample *sample,
94 struct perf_evsel *evsel,
95 struct machine *machine);
97 static int perf_event__repipe_sample(struct perf_tool *tool,
98 union perf_event *event,
99 struct perf_sample *sample,
100 struct perf_evsel *evsel,
101 struct machine *machine)
103 if (evsel->handler.func) {
104 inject_handler f = evsel->handler.func;
105 return f(tool, event, sample, evsel, machine);
108 build_id__mark_dso_hit(tool, event, sample, evsel, machine);
110 return perf_event__repipe_synth(tool, event);
113 static int perf_event__repipe_mmap(struct perf_tool *tool,
114 union perf_event *event,
115 struct perf_sample *sample,
116 struct machine *machine)
120 err = perf_event__process_mmap(tool, event, sample, machine);
121 perf_event__repipe(tool, event, sample, machine);
126 static int perf_event__repipe_fork(struct perf_tool *tool,
127 union perf_event *event,
128 struct perf_sample *sample,
129 struct machine *machine)
133 err = perf_event__process_fork(tool, event, sample, machine);
134 perf_event__repipe(tool, event, sample, machine);
139 static int perf_event__repipe_tracing_data(struct perf_tool *tool,
140 union perf_event *event,
141 struct perf_session *session)
145 perf_event__repipe_synth(tool, event);
146 err = perf_event__process_tracing_data(tool, event, session);
151 static int dso__read_build_id(struct dso *self)
153 if (self->has_build_id)
156 if (filename__read_build_id(self->long_name, self->build_id,
157 sizeof(self->build_id)) > 0) {
158 self->has_build_id = true;
165 static int dso__inject_build_id(struct dso *self, struct perf_tool *tool,
166 struct machine *machine)
168 u16 misc = PERF_RECORD_MISC_USER;
171 if (dso__read_build_id(self) < 0) {
172 pr_debug("no build_id found for %s\n", self->long_name);
177 misc = PERF_RECORD_MISC_KERNEL;
179 err = perf_event__synthesize_build_id(tool, self, misc, perf_event__repipe,
182 pr_err("Can't synthesize build_id event for %s\n", self->long_name);
189 static int perf_event__inject_buildid(struct perf_tool *tool,
190 union perf_event *event,
191 struct perf_sample *sample,
192 struct perf_evsel *evsel __maybe_unused,
193 struct machine *machine)
195 struct addr_location al;
196 struct thread *thread;
199 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
201 thread = machine__findnew_thread(machine, event->ip.pid);
202 if (thread == NULL) {
203 pr_err("problem processing %d event, skipping it.\n",
208 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
211 if (al.map != NULL) {
212 if (!al.map->dso->hit) {
213 al.map->dso->hit = 1;
214 if (map__load(al.map, NULL) >= 0) {
215 dso__inject_build_id(al.map->dso, tool, machine);
217 * If this fails, too bad, let the other side
218 * account this as unresolved.
221 #ifdef LIBELF_SUPPORT
222 pr_warning("no symbols found in %s, maybe "
223 "install a debug package?\n",
224 al.map->dso->long_name);
231 perf_event__repipe(tool, event, sample, machine);
235 static int perf_inject__sched_process_exit(struct perf_tool *tool,
236 union perf_event *event __maybe_unused,
237 struct perf_sample *sample,
238 struct perf_evsel *evsel __maybe_unused,
239 struct machine *machine __maybe_unused)
241 struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
242 struct event_entry *ent;
244 list_for_each_entry(ent, &inject->samples, node) {
245 if (sample->tid == ent->tid) {
246 list_del_init(&ent->node);
255 static int perf_inject__sched_switch(struct perf_tool *tool,
256 union perf_event *event,
257 struct perf_sample *sample,
258 struct perf_evsel *evsel,
259 struct machine *machine)
261 struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
262 struct event_entry *ent;
264 perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
266 ent = malloc(event->header.size + sizeof(struct event_entry));
268 color_fprintf(stderr, PERF_COLOR_RED,
269 "Not enough memory to process sched switch event!");
273 ent->tid = sample->tid;
274 memcpy(&ent->event, event, event->header.size);
275 list_add(&ent->node, &inject->samples);
279 static int perf_inject__sched_stat(struct perf_tool *tool,
280 union perf_event *event __maybe_unused,
281 struct perf_sample *sample,
282 struct perf_evsel *evsel,
283 struct machine *machine)
285 struct event_entry *ent;
286 union perf_event *event_sw;
287 struct perf_sample sample_sw;
288 struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
289 u32 pid = perf_evsel__intval(evsel, sample, "pid");
291 list_for_each_entry(ent, &inject->samples, node) {
298 event_sw = &ent->event[0];
299 perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
301 sample_sw.period = sample->period;
302 sample_sw.time = sample->time;
303 perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
305 build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
306 return perf_event__repipe(tool, event_sw, &sample_sw, machine);
309 extern volatile int session_done;
311 static void sig_handler(int sig __maybe_unused)
316 static int perf_evsel__check_stype(struct perf_evsel *evsel,
317 u64 sample_type, const char *sample_msg)
319 struct perf_event_attr *attr = &evsel->attr;
320 const char *name = perf_evsel__name(evsel);
322 if (!(attr->sample_type & sample_type)) {
323 pr_err("Samples for %s event do not have %s attribute set.",
331 static int __cmd_inject(struct perf_inject *inject)
333 struct perf_session *session;
336 signal(SIGINT, sig_handler);
338 if (inject->build_ids || inject->sched_stat) {
339 inject->tool.mmap = perf_event__repipe_mmap;
340 inject->tool.fork = perf_event__repipe_fork;
341 inject->tool.tracing_data = perf_event__repipe_tracing_data;
344 session = perf_session__new(inject->input_name, O_RDONLY, false, true, &inject->tool);
348 if (inject->build_ids) {
349 inject->tool.sample = perf_event__inject_buildid;
350 } else if (inject->sched_stat) {
351 struct perf_evsel *evsel;
353 inject->tool.ordered_samples = true;
355 list_for_each_entry(evsel, &session->evlist->entries, node) {
356 const char *name = perf_evsel__name(evsel);
358 if (!strcmp(name, "sched:sched_switch")) {
359 if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
362 evsel->handler.func = perf_inject__sched_switch;
363 } else if (!strcmp(name, "sched:sched_process_exit"))
364 evsel->handler.func = perf_inject__sched_process_exit;
365 else if (!strncmp(name, "sched:sched_stat_", 17))
366 evsel->handler.func = perf_inject__sched_stat;
370 if (!inject->pipe_output)
371 lseek(inject->output, session->header.data_offset, SEEK_SET);
373 ret = perf_session__process_events(session, &inject->tool);
375 if (!inject->pipe_output) {
376 session->header.data_size = inject->bytes_written;
377 perf_session__write_header(session, session->evlist, inject->output, true);
380 perf_session__delete(session);
385 int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
387 struct perf_inject inject = {
389 .sample = perf_event__repipe_sample,
390 .mmap = perf_event__repipe,
391 .comm = perf_event__repipe,
392 .fork = perf_event__repipe,
393 .exit = perf_event__repipe,
394 .lost = perf_event__repipe,
395 .read = perf_event__repipe_sample,
396 .throttle = perf_event__repipe,
397 .unthrottle = perf_event__repipe,
398 .attr = perf_event__repipe_attr,
399 .tracing_data = perf_event__repipe_op2_synth,
400 .finished_round = perf_event__repipe_op2_synth,
401 .build_id = perf_event__repipe_op2_synth,
404 .samples = LIST_HEAD_INIT(inject.samples),
406 const char *output_name = "-";
407 const struct option options[] = {
408 OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
409 "Inject build-ids into the output stream"),
410 OPT_STRING('i', "input", &inject.input_name, "file",
412 OPT_STRING('o', "output", &output_name, "file",
414 OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
415 "Merge sched-stat and sched-switch for getting events "
416 "where and how long tasks slept"),
417 OPT_INCR('v', "verbose", &verbose,
418 "be more verbose (show build ids, etc)"),
421 const char * const inject_usage[] = {
422 "perf inject [<options>]",
426 argc = parse_options(argc, argv, options, inject_usage, 0);
429 * Any (unrecognized) arguments left?
432 usage_with_options(inject_usage, options);
434 if (!strcmp(output_name, "-")) {
435 inject.pipe_output = 1;
436 inject.output = STDOUT_FILENO;
438 inject.output = open(output_name, O_CREAT | O_WRONLY | O_TRUNC,
440 if (inject.output < 0) {
441 perror("failed to create output file");
446 if (symbol__init() < 0)
449 return __cmd_inject(&inject);