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Commit | Line | Data |
---|---|---|
abaff32a | 1 | /* |
bf9e1876 IM |
2 | * builtin-record.c |
3 | * | |
4 | * Builtin record command: Record the profile of a workload | |
5 | * (or a CPU, or a PID) into the perf.data output file - for | |
6 | * later analysis via perf report. | |
abaff32a | 7 | */ |
16f762a2 | 8 | #include "builtin.h" |
bf9e1876 IM |
9 | |
10 | #include "perf.h" | |
11 | ||
6122e4e4 | 12 | #include "util/build-id.h" |
6eda5838 | 13 | #include "util/util.h" |
4b6ab94e | 14 | #include <subcmd/parse-options.h> |
8ad8db37 | 15 | #include "util/parse-events.h" |
41840d21 | 16 | #include "util/config.h" |
6eda5838 | 17 | |
8f651eae | 18 | #include "util/callchain.h" |
f14d5707 | 19 | #include "util/cgroup.h" |
7c6a1c65 | 20 | #include "util/header.h" |
66e274f3 | 21 | #include "util/event.h" |
361c99a6 | 22 | #include "util/evlist.h" |
69aad6f1 | 23 | #include "util/evsel.h" |
8f28827a | 24 | #include "util/debug.h" |
5d8bb1ec | 25 | #include "util/drv_configs.h" |
94c744b6 | 26 | #include "util/session.h" |
45694aa7 | 27 | #include "util/tool.h" |
8d06367f | 28 | #include "util/symbol.h" |
a12b51c4 | 29 | #include "util/cpumap.h" |
fd78260b | 30 | #include "util/thread_map.h" |
f5fc1412 | 31 | #include "util/data.h" |
bcc84ec6 | 32 | #include "util/perf_regs.h" |
ef149c25 | 33 | #include "util/auxtrace.h" |
46bc29b9 | 34 | #include "util/tsc.h" |
f00898f4 | 35 | #include "util/parse-branch-options.h" |
bcc84ec6 | 36 | #include "util/parse-regs-options.h" |
71dc2326 | 37 | #include "util/llvm-utils.h" |
8690a2a7 | 38 | #include "util/bpf-loader.h" |
5f9cf599 | 39 | #include "util/trigger.h" |
a074865e | 40 | #include "util/perf-hooks.h" |
c5e4027e | 41 | #include "util/time-utils.h" |
58db1d6e | 42 | #include "util/units.h" |
d8871ea7 | 43 | #include "asm/bug.h" |
7c6a1c65 | 44 | |
a43783ae | 45 | #include <errno.h> |
fd20e811 | 46 | #include <inttypes.h> |
4208735d | 47 | #include <poll.h> |
97124d5e | 48 | #include <unistd.h> |
de9ac07b | 49 | #include <sched.h> |
9607ad3a | 50 | #include <signal.h> |
a41794cd | 51 | #include <sys/mman.h> |
4208735d | 52 | #include <sys/wait.h> |
2d11c650 | 53 | #include <asm/bug.h> |
0693e680 | 54 | #include <linux/time64.h> |
78da39fa | 55 | |
1b43b704 | 56 | struct switch_output { |
dc0c6127 | 57 | bool enabled; |
1b43b704 | 58 | bool signal; |
dc0c6127 | 59 | unsigned long size; |
bfacbe3b | 60 | unsigned long time; |
cb4e1ebb JO |
61 | const char *str; |
62 | bool set; | |
1b43b704 JO |
63 | }; |
64 | ||
8c6f45a7 | 65 | struct record { |
45694aa7 | 66 | struct perf_tool tool; |
b4006796 | 67 | struct record_opts opts; |
d20deb64 | 68 | u64 bytes_written; |
f5fc1412 | 69 | struct perf_data_file file; |
ef149c25 | 70 | struct auxtrace_record *itr; |
d20deb64 ACM |
71 | struct perf_evlist *evlist; |
72 | struct perf_session *session; | |
73 | const char *progname; | |
d20deb64 | 74 | int realtime_prio; |
d20deb64 | 75 | bool no_buildid; |
d2db9a98 | 76 | bool no_buildid_set; |
d20deb64 | 77 | bool no_buildid_cache; |
d2db9a98 | 78 | bool no_buildid_cache_set; |
6156681b | 79 | bool buildid_all; |
ecfd7a9c | 80 | bool timestamp_filename; |
1b43b704 | 81 | struct switch_output switch_output; |
9f065194 | 82 | unsigned long long samples; |
0f82ebc4 | 83 | }; |
a21ca2ca | 84 | |
dc0c6127 JO |
85 | static volatile int auxtrace_record__snapshot_started; |
86 | static DEFINE_TRIGGER(auxtrace_snapshot_trigger); | |
87 | static DEFINE_TRIGGER(switch_output_trigger); | |
88 | ||
89 | static bool switch_output_signal(struct record *rec) | |
90 | { | |
91 | return rec->switch_output.signal && | |
92 | trigger_is_ready(&switch_output_trigger); | |
93 | } | |
94 | ||
95 | static bool switch_output_size(struct record *rec) | |
96 | { | |
97 | return rec->switch_output.size && | |
98 | trigger_is_ready(&switch_output_trigger) && | |
99 | (rec->bytes_written >= rec->switch_output.size); | |
100 | } | |
101 | ||
bfacbe3b JO |
102 | static bool switch_output_time(struct record *rec) |
103 | { | |
104 | return rec->switch_output.time && | |
105 | trigger_is_ready(&switch_output_trigger); | |
106 | } | |
107 | ||
8c6f45a7 | 108 | static int record__write(struct record *rec, void *bf, size_t size) |
f5970550 | 109 | { |
cf8b2e69 | 110 | if (perf_data_file__write(rec->session->file, bf, size) < 0) { |
50a9b868 JO |
111 | pr_err("failed to write perf data, error: %m\n"); |
112 | return -1; | |
f5970550 | 113 | } |
8d3eca20 | 114 | |
cf8b2e69 | 115 | rec->bytes_written += size; |
dc0c6127 JO |
116 | |
117 | if (switch_output_size(rec)) | |
118 | trigger_hit(&switch_output_trigger); | |
119 | ||
8d3eca20 | 120 | return 0; |
f5970550 PZ |
121 | } |
122 | ||
45694aa7 | 123 | static int process_synthesized_event(struct perf_tool *tool, |
d20deb64 | 124 | union perf_event *event, |
1d037ca1 IT |
125 | struct perf_sample *sample __maybe_unused, |
126 | struct machine *machine __maybe_unused) | |
234fbbf5 | 127 | { |
8c6f45a7 ACM |
128 | struct record *rec = container_of(tool, struct record, tool); |
129 | return record__write(rec, event, event->header.size); | |
234fbbf5 ACM |
130 | } |
131 | ||
3a62a7b8 WN |
132 | static int |
133 | backward_rb_find_range(void *buf, int mask, u64 head, u64 *start, u64 *end) | |
134 | { | |
135 | struct perf_event_header *pheader; | |
136 | u64 evt_head = head; | |
137 | int size = mask + 1; | |
138 | ||
139 | pr_debug2("backward_rb_find_range: buf=%p, head=%"PRIx64"\n", buf, head); | |
140 | pheader = (struct perf_event_header *)(buf + (head & mask)); | |
141 | *start = head; | |
142 | while (true) { | |
143 | if (evt_head - head >= (unsigned int)size) { | |
5e30d55c | 144 | pr_debug("Finished reading backward ring buffer: rewind\n"); |
3a62a7b8 WN |
145 | if (evt_head - head > (unsigned int)size) |
146 | evt_head -= pheader->size; | |
147 | *end = evt_head; | |
148 | return 0; | |
149 | } | |
150 | ||
151 | pheader = (struct perf_event_header *)(buf + (evt_head & mask)); | |
152 | ||
153 | if (pheader->size == 0) { | |
5e30d55c | 154 | pr_debug("Finished reading backward ring buffer: get start\n"); |
3a62a7b8 WN |
155 | *end = evt_head; |
156 | return 0; | |
157 | } | |
158 | ||
159 | evt_head += pheader->size; | |
160 | pr_debug3("move evt_head: %"PRIx64"\n", evt_head); | |
161 | } | |
162 | WARN_ONCE(1, "Shouldn't get here\n"); | |
163 | return -1; | |
164 | } | |
165 | ||
166 | static int | |
a4ea0ec4 WN |
167 | rb_find_range(void *data, int mask, u64 head, u64 old, |
168 | u64 *start, u64 *end, bool backward) | |
3a62a7b8 | 169 | { |
a4ea0ec4 | 170 | if (!backward) { |
3a62a7b8 WN |
171 | *start = old; |
172 | *end = head; | |
173 | return 0; | |
174 | } | |
175 | ||
176 | return backward_rb_find_range(data, mask, head, start, end); | |
177 | } | |
178 | ||
a4ea0ec4 WN |
179 | static int |
180 | record__mmap_read(struct record *rec, struct perf_mmap *md, | |
181 | bool overwrite, bool backward) | |
de9ac07b | 182 | { |
7b8283b5 DA |
183 | u64 head = perf_mmap__read_head(md); |
184 | u64 old = md->prev; | |
09fa4f40 | 185 | u64 end = head, start = old; |
918512b4 | 186 | unsigned char *data = md->base + page_size; |
de9ac07b PZ |
187 | unsigned long size; |
188 | void *buf; | |
8d3eca20 | 189 | int rc = 0; |
de9ac07b | 190 | |
a4ea0ec4 WN |
191 | if (rb_find_range(data, md->mask, head, |
192 | old, &start, &end, backward)) | |
3a62a7b8 WN |
193 | return -1; |
194 | ||
09fa4f40 | 195 | if (start == end) |
8d3eca20 | 196 | return 0; |
dc82009a | 197 | |
d20deb64 | 198 | rec->samples++; |
de9ac07b | 199 | |
09fa4f40 | 200 | size = end - start; |
2d11c650 WN |
201 | if (size > (unsigned long)(md->mask) + 1) { |
202 | WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n"); | |
203 | ||
204 | md->prev = head; | |
a4ea0ec4 | 205 | perf_mmap__consume(md, overwrite || backward); |
2d11c650 WN |
206 | return 0; |
207 | } | |
de9ac07b | 208 | |
09fa4f40 WN |
209 | if ((start & md->mask) + size != (end & md->mask)) { |
210 | buf = &data[start & md->mask]; | |
211 | size = md->mask + 1 - (start & md->mask); | |
212 | start += size; | |
021e9f47 | 213 | |
8c6f45a7 | 214 | if (record__write(rec, buf, size) < 0) { |
8d3eca20 DA |
215 | rc = -1; |
216 | goto out; | |
217 | } | |
de9ac07b PZ |
218 | } |
219 | ||
09fa4f40 WN |
220 | buf = &data[start & md->mask]; |
221 | size = end - start; | |
222 | start += size; | |
021e9f47 | 223 | |
8c6f45a7 | 224 | if (record__write(rec, buf, size) < 0) { |
8d3eca20 DA |
225 | rc = -1; |
226 | goto out; | |
227 | } | |
de9ac07b | 228 | |
09fa4f40 | 229 | md->prev = head; |
a4ea0ec4 | 230 | perf_mmap__consume(md, overwrite || backward); |
8d3eca20 DA |
231 | out: |
232 | return rc; | |
de9ac07b PZ |
233 | } |
234 | ||
2dd6d8a1 AH |
235 | static volatile int done; |
236 | static volatile int signr = -1; | |
237 | static volatile int child_finished; | |
c0bdc1c4 | 238 | |
2dd6d8a1 AH |
239 | static void sig_handler(int sig) |
240 | { | |
241 | if (sig == SIGCHLD) | |
242 | child_finished = 1; | |
243 | else | |
244 | signr = sig; | |
245 | ||
246 | done = 1; | |
247 | } | |
248 | ||
a074865e WN |
249 | static void sigsegv_handler(int sig) |
250 | { | |
251 | perf_hooks__recover(); | |
252 | sighandler_dump_stack(sig); | |
253 | } | |
254 | ||
2dd6d8a1 AH |
255 | static void record__sig_exit(void) |
256 | { | |
257 | if (signr == -1) | |
258 | return; | |
259 | ||
260 | signal(signr, SIG_DFL); | |
261 | raise(signr); | |
262 | } | |
263 | ||
e31f0d01 AH |
264 | #ifdef HAVE_AUXTRACE_SUPPORT |
265 | ||
ef149c25 AH |
266 | static int record__process_auxtrace(struct perf_tool *tool, |
267 | union perf_event *event, void *data1, | |
268 | size_t len1, void *data2, size_t len2) | |
269 | { | |
270 | struct record *rec = container_of(tool, struct record, tool); | |
99fa2984 | 271 | struct perf_data_file *file = &rec->file; |
ef149c25 AH |
272 | size_t padding; |
273 | u8 pad[8] = {0}; | |
274 | ||
99fa2984 AH |
275 | if (!perf_data_file__is_pipe(file)) { |
276 | off_t file_offset; | |
277 | int fd = perf_data_file__fd(file); | |
278 | int err; | |
279 | ||
280 | file_offset = lseek(fd, 0, SEEK_CUR); | |
281 | if (file_offset == -1) | |
282 | return -1; | |
283 | err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index, | |
284 | event, file_offset); | |
285 | if (err) | |
286 | return err; | |
287 | } | |
288 | ||
ef149c25 AH |
289 | /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */ |
290 | padding = (len1 + len2) & 7; | |
291 | if (padding) | |
292 | padding = 8 - padding; | |
293 | ||
294 | record__write(rec, event, event->header.size); | |
295 | record__write(rec, data1, len1); | |
296 | if (len2) | |
297 | record__write(rec, data2, len2); | |
298 | record__write(rec, &pad, padding); | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
303 | static int record__auxtrace_mmap_read(struct record *rec, | |
304 | struct auxtrace_mmap *mm) | |
305 | { | |
306 | int ret; | |
307 | ||
308 | ret = auxtrace_mmap__read(mm, rec->itr, &rec->tool, | |
309 | record__process_auxtrace); | |
310 | if (ret < 0) | |
311 | return ret; | |
312 | ||
313 | if (ret) | |
314 | rec->samples++; | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
2dd6d8a1 AH |
319 | static int record__auxtrace_mmap_read_snapshot(struct record *rec, |
320 | struct auxtrace_mmap *mm) | |
321 | { | |
322 | int ret; | |
323 | ||
324 | ret = auxtrace_mmap__read_snapshot(mm, rec->itr, &rec->tool, | |
325 | record__process_auxtrace, | |
326 | rec->opts.auxtrace_snapshot_size); | |
327 | if (ret < 0) | |
328 | return ret; | |
329 | ||
330 | if (ret) | |
331 | rec->samples++; | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
336 | static int record__auxtrace_read_snapshot_all(struct record *rec) | |
337 | { | |
338 | int i; | |
339 | int rc = 0; | |
340 | ||
341 | for (i = 0; i < rec->evlist->nr_mmaps; i++) { | |
342 | struct auxtrace_mmap *mm = | |
343 | &rec->evlist->mmap[i].auxtrace_mmap; | |
344 | ||
345 | if (!mm->base) | |
346 | continue; | |
347 | ||
348 | if (record__auxtrace_mmap_read_snapshot(rec, mm) != 0) { | |
349 | rc = -1; | |
350 | goto out; | |
351 | } | |
352 | } | |
353 | out: | |
354 | return rc; | |
355 | } | |
356 | ||
357 | static void record__read_auxtrace_snapshot(struct record *rec) | |
358 | { | |
359 | pr_debug("Recording AUX area tracing snapshot\n"); | |
360 | if (record__auxtrace_read_snapshot_all(rec) < 0) { | |
5f9cf599 | 361 | trigger_error(&auxtrace_snapshot_trigger); |
2dd6d8a1 | 362 | } else { |
5f9cf599 WN |
363 | if (auxtrace_record__snapshot_finish(rec->itr)) |
364 | trigger_error(&auxtrace_snapshot_trigger); | |
365 | else | |
366 | trigger_ready(&auxtrace_snapshot_trigger); | |
2dd6d8a1 AH |
367 | } |
368 | } | |
369 | ||
e31f0d01 AH |
370 | #else |
371 | ||
372 | static inline | |
373 | int record__auxtrace_mmap_read(struct record *rec __maybe_unused, | |
374 | struct auxtrace_mmap *mm __maybe_unused) | |
375 | { | |
376 | return 0; | |
377 | } | |
378 | ||
2dd6d8a1 AH |
379 | static inline |
380 | void record__read_auxtrace_snapshot(struct record *rec __maybe_unused) | |
de9ac07b | 381 | { |
f7b7c26e PZ |
382 | } |
383 | ||
2dd6d8a1 AH |
384 | static inline |
385 | int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused) | |
f7b7c26e | 386 | { |
2dd6d8a1 | 387 | return 0; |
de9ac07b PZ |
388 | } |
389 | ||
2dd6d8a1 AH |
390 | #endif |
391 | ||
cda57a8c WN |
392 | static int record__mmap_evlist(struct record *rec, |
393 | struct perf_evlist *evlist) | |
394 | { | |
395 | struct record_opts *opts = &rec->opts; | |
396 | char msg[512]; | |
397 | ||
398 | if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false, | |
399 | opts->auxtrace_mmap_pages, | |
400 | opts->auxtrace_snapshot_mode) < 0) { | |
401 | if (errno == EPERM) { | |
402 | pr_err("Permission error mapping pages.\n" | |
403 | "Consider increasing " | |
404 | "/proc/sys/kernel/perf_event_mlock_kb,\n" | |
405 | "or try again with a smaller value of -m/--mmap_pages.\n" | |
406 | "(current value: %u,%u)\n", | |
407 | opts->mmap_pages, opts->auxtrace_mmap_pages); | |
408 | return -errno; | |
409 | } else { | |
410 | pr_err("failed to mmap with %d (%s)\n", errno, | |
c8b5f2c9 | 411 | str_error_r(errno, msg, sizeof(msg))); |
cda57a8c WN |
412 | if (errno) |
413 | return -errno; | |
414 | else | |
415 | return -EINVAL; | |
416 | } | |
417 | } | |
418 | return 0; | |
419 | } | |
420 | ||
421 | static int record__mmap(struct record *rec) | |
422 | { | |
423 | return record__mmap_evlist(rec, rec->evlist); | |
424 | } | |
425 | ||
8c6f45a7 | 426 | static int record__open(struct record *rec) |
dd7927f4 | 427 | { |
d6195a6a | 428 | char msg[BUFSIZ]; |
6a4bb04c | 429 | struct perf_evsel *pos; |
d20deb64 ACM |
430 | struct perf_evlist *evlist = rec->evlist; |
431 | struct perf_session *session = rec->session; | |
b4006796 | 432 | struct record_opts *opts = &rec->opts; |
5d8bb1ec | 433 | struct perf_evsel_config_term *err_term; |
8d3eca20 | 434 | int rc = 0; |
dd7927f4 | 435 | |
e68ae9cf | 436 | perf_evlist__config(evlist, opts, &callchain_param); |
cac21425 | 437 | |
e5cadb93 | 438 | evlist__for_each_entry(evlist, pos) { |
dd7927f4 | 439 | try_again: |
d988d5ee | 440 | if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) { |
56e52e85 | 441 | if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) { |
bb963e16 | 442 | if (verbose > 0) |
c0a54341 | 443 | ui__warning("%s\n", msg); |
d6d901c2 ZY |
444 | goto try_again; |
445 | } | |
ca6a4258 | 446 | |
56e52e85 ACM |
447 | rc = -errno; |
448 | perf_evsel__open_strerror(pos, &opts->target, | |
449 | errno, msg, sizeof(msg)); | |
450 | ui__error("%s\n", msg); | |
8d3eca20 | 451 | goto out; |
c171b552 LZ |
452 | } |
453 | } | |
a43d3f08 | 454 | |
23d4aad4 | 455 | if (perf_evlist__apply_filters(evlist, &pos)) { |
62d94b00 | 456 | pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", |
23d4aad4 | 457 | pos->filter, perf_evsel__name(pos), errno, |
c8b5f2c9 | 458 | str_error_r(errno, msg, sizeof(msg))); |
8d3eca20 | 459 | rc = -1; |
5d8bb1ec MP |
460 | goto out; |
461 | } | |
462 | ||
463 | if (perf_evlist__apply_drv_configs(evlist, &pos, &err_term)) { | |
62d94b00 | 464 | pr_err("failed to set config \"%s\" on event %s with %d (%s)\n", |
5d8bb1ec MP |
465 | err_term->val.drv_cfg, perf_evsel__name(pos), errno, |
466 | str_error_r(errno, msg, sizeof(msg))); | |
467 | rc = -1; | |
8d3eca20 | 468 | goto out; |
0a102479 FW |
469 | } |
470 | ||
cda57a8c WN |
471 | rc = record__mmap(rec); |
472 | if (rc) | |
8d3eca20 | 473 | goto out; |
0a27d7f9 | 474 | |
563aecb2 | 475 | session->evlist = evlist; |
7b56cce2 | 476 | perf_session__set_id_hdr_size(session); |
8d3eca20 DA |
477 | out: |
478 | return rc; | |
16c8a109 PZ |
479 | } |
480 | ||
e3d59112 NK |
481 | static int process_sample_event(struct perf_tool *tool, |
482 | union perf_event *event, | |
483 | struct perf_sample *sample, | |
484 | struct perf_evsel *evsel, | |
485 | struct machine *machine) | |
486 | { | |
487 | struct record *rec = container_of(tool, struct record, tool); | |
488 | ||
489 | rec->samples++; | |
490 | ||
491 | return build_id__mark_dso_hit(tool, event, sample, evsel, machine); | |
492 | } | |
493 | ||
8c6f45a7 | 494 | static int process_buildids(struct record *rec) |
6122e4e4 | 495 | { |
f5fc1412 JO |
496 | struct perf_data_file *file = &rec->file; |
497 | struct perf_session *session = rec->session; | |
6122e4e4 | 498 | |
457ae94a | 499 | if (file->size == 0) |
9f591fd7 ACM |
500 | return 0; |
501 | ||
00dc8657 NK |
502 | /* |
503 | * During this process, it'll load kernel map and replace the | |
504 | * dso->long_name to a real pathname it found. In this case | |
505 | * we prefer the vmlinux path like | |
506 | * /lib/modules/3.16.4/build/vmlinux | |
507 | * | |
508 | * rather than build-id path (in debug directory). | |
509 | * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 | |
510 | */ | |
511 | symbol_conf.ignore_vmlinux_buildid = true; | |
512 | ||
6156681b NK |
513 | /* |
514 | * If --buildid-all is given, it marks all DSO regardless of hits, | |
515 | * so no need to process samples. | |
516 | */ | |
517 | if (rec->buildid_all) | |
518 | rec->tool.sample = NULL; | |
519 | ||
b7b61cbe | 520 | return perf_session__process_events(session); |
6122e4e4 ACM |
521 | } |
522 | ||
8115d60c | 523 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
524 | { |
525 | int err; | |
45694aa7 | 526 | struct perf_tool *tool = data; |
a1645ce1 ZY |
527 | /* |
528 | *As for guest kernel when processing subcommand record&report, | |
529 | *we arrange module mmap prior to guest kernel mmap and trigger | |
530 | *a preload dso because default guest module symbols are loaded | |
531 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
532 | *method is used to avoid symbol missing when the first addr is | |
533 | *in module instead of in guest kernel. | |
534 | */ | |
45694aa7 | 535 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 536 | machine); |
a1645ce1 ZY |
537 | if (err < 0) |
538 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 539 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 540 | |
a1645ce1 ZY |
541 | /* |
542 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
543 | * have no _text sometimes. | |
544 | */ | |
45694aa7 | 545 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
0ae617be | 546 | machine); |
a1645ce1 ZY |
547 | if (err < 0) |
548 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 549 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
550 | } |
551 | ||
98402807 FW |
552 | static struct perf_event_header finished_round_event = { |
553 | .size = sizeof(struct perf_event_header), | |
554 | .type = PERF_RECORD_FINISHED_ROUND, | |
555 | }; | |
556 | ||
a4ea0ec4 WN |
557 | static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist, |
558 | bool backward) | |
98402807 | 559 | { |
dcabb507 | 560 | u64 bytes_written = rec->bytes_written; |
0e2e63dd | 561 | int i; |
8d3eca20 | 562 | int rc = 0; |
a4ea0ec4 | 563 | struct perf_mmap *maps; |
98402807 | 564 | |
cb21686b WN |
565 | if (!evlist) |
566 | return 0; | |
ef149c25 | 567 | |
b2cb615d | 568 | maps = backward ? evlist->backward_mmap : evlist->mmap; |
a4ea0ec4 WN |
569 | if (!maps) |
570 | return 0; | |
571 | ||
54cc54de WN |
572 | if (backward && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING) |
573 | return 0; | |
574 | ||
cb21686b | 575 | for (i = 0; i < evlist->nr_mmaps; i++) { |
a4ea0ec4 | 576 | struct auxtrace_mmap *mm = &maps[i].auxtrace_mmap; |
cb21686b | 577 | |
a4ea0ec4 WN |
578 | if (maps[i].base) { |
579 | if (record__mmap_read(rec, &maps[i], | |
580 | evlist->overwrite, backward) != 0) { | |
8d3eca20 DA |
581 | rc = -1; |
582 | goto out; | |
583 | } | |
584 | } | |
ef149c25 | 585 | |
2dd6d8a1 | 586 | if (mm->base && !rec->opts.auxtrace_snapshot_mode && |
ef149c25 AH |
587 | record__auxtrace_mmap_read(rec, mm) != 0) { |
588 | rc = -1; | |
589 | goto out; | |
590 | } | |
98402807 FW |
591 | } |
592 | ||
dcabb507 JO |
593 | /* |
594 | * Mark the round finished in case we wrote | |
595 | * at least one event. | |
596 | */ | |
597 | if (bytes_written != rec->bytes_written) | |
598 | rc = record__write(rec, &finished_round_event, sizeof(finished_round_event)); | |
8d3eca20 | 599 | |
54cc54de WN |
600 | if (backward) |
601 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); | |
8d3eca20 DA |
602 | out: |
603 | return rc; | |
98402807 FW |
604 | } |
605 | ||
cb21686b WN |
606 | static int record__mmap_read_all(struct record *rec) |
607 | { | |
608 | int err; | |
609 | ||
a4ea0ec4 | 610 | err = record__mmap_read_evlist(rec, rec->evlist, false); |
cb21686b WN |
611 | if (err) |
612 | return err; | |
613 | ||
05737464 | 614 | return record__mmap_read_evlist(rec, rec->evlist, true); |
cb21686b WN |
615 | } |
616 | ||
8c6f45a7 | 617 | static void record__init_features(struct record *rec) |
57706abc | 618 | { |
57706abc DA |
619 | struct perf_session *session = rec->session; |
620 | int feat; | |
621 | ||
622 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) | |
623 | perf_header__set_feat(&session->header, feat); | |
624 | ||
625 | if (rec->no_buildid) | |
626 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); | |
627 | ||
3e2be2da | 628 | if (!have_tracepoints(&rec->evlist->entries)) |
57706abc DA |
629 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
630 | ||
631 | if (!rec->opts.branch_stack) | |
632 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); | |
ef149c25 AH |
633 | |
634 | if (!rec->opts.full_auxtrace) | |
635 | perf_header__clear_feat(&session->header, HEADER_AUXTRACE); | |
ffa517ad JO |
636 | |
637 | perf_header__clear_feat(&session->header, HEADER_STAT); | |
57706abc DA |
638 | } |
639 | ||
e1ab48ba WN |
640 | static void |
641 | record__finish_output(struct record *rec) | |
642 | { | |
643 | struct perf_data_file *file = &rec->file; | |
644 | int fd = perf_data_file__fd(file); | |
645 | ||
646 | if (file->is_pipe) | |
647 | return; | |
648 | ||
649 | rec->session->header.data_size += rec->bytes_written; | |
650 | file->size = lseek(perf_data_file__fd(file), 0, SEEK_CUR); | |
651 | ||
652 | if (!rec->no_buildid) { | |
653 | process_buildids(rec); | |
654 | ||
655 | if (rec->buildid_all) | |
656 | dsos__hit_all(rec->session); | |
657 | } | |
658 | perf_session__write_header(rec->session, rec->evlist, fd, true); | |
659 | ||
660 | return; | |
661 | } | |
662 | ||
4ea648ae | 663 | static int record__synthesize_workload(struct record *rec, bool tail) |
be7b0c9e | 664 | { |
9d6aae72 ACM |
665 | int err; |
666 | struct thread_map *thread_map; | |
be7b0c9e | 667 | |
4ea648ae WN |
668 | if (rec->opts.tail_synthesize != tail) |
669 | return 0; | |
670 | ||
9d6aae72 ACM |
671 | thread_map = thread_map__new_by_tid(rec->evlist->workload.pid); |
672 | if (thread_map == NULL) | |
673 | return -1; | |
674 | ||
675 | err = perf_event__synthesize_thread_map(&rec->tool, thread_map, | |
be7b0c9e WN |
676 | process_synthesized_event, |
677 | &rec->session->machines.host, | |
678 | rec->opts.sample_address, | |
679 | rec->opts.proc_map_timeout); | |
9d6aae72 ACM |
680 | thread_map__put(thread_map); |
681 | return err; | |
be7b0c9e WN |
682 | } |
683 | ||
4ea648ae | 684 | static int record__synthesize(struct record *rec, bool tail); |
3c1cb7e3 | 685 | |
ecfd7a9c WN |
686 | static int |
687 | record__switch_output(struct record *rec, bool at_exit) | |
688 | { | |
689 | struct perf_data_file *file = &rec->file; | |
690 | int fd, err; | |
691 | ||
692 | /* Same Size: "2015122520103046"*/ | |
693 | char timestamp[] = "InvalidTimestamp"; | |
694 | ||
4ea648ae WN |
695 | record__synthesize(rec, true); |
696 | if (target__none(&rec->opts.target)) | |
697 | record__synthesize_workload(rec, true); | |
698 | ||
ecfd7a9c WN |
699 | rec->samples = 0; |
700 | record__finish_output(rec); | |
701 | err = fetch_current_timestamp(timestamp, sizeof(timestamp)); | |
702 | if (err) { | |
703 | pr_err("Failed to get current timestamp\n"); | |
704 | return -EINVAL; | |
705 | } | |
706 | ||
707 | fd = perf_data_file__switch(file, timestamp, | |
708 | rec->session->header.data_offset, | |
709 | at_exit); | |
710 | if (fd >= 0 && !at_exit) { | |
711 | rec->bytes_written = 0; | |
712 | rec->session->header.data_size = 0; | |
713 | } | |
714 | ||
715 | if (!quiet) | |
716 | fprintf(stderr, "[ perf record: Dump %s.%s ]\n", | |
717 | file->path, timestamp); | |
3c1cb7e3 WN |
718 | |
719 | /* Output tracking events */ | |
be7b0c9e | 720 | if (!at_exit) { |
4ea648ae | 721 | record__synthesize(rec, false); |
3c1cb7e3 | 722 | |
be7b0c9e WN |
723 | /* |
724 | * In 'perf record --switch-output' without -a, | |
725 | * record__synthesize() in record__switch_output() won't | |
726 | * generate tracking events because there's no thread_map | |
727 | * in evlist. Which causes newly created perf.data doesn't | |
728 | * contain map and comm information. | |
729 | * Create a fake thread_map and directly call | |
730 | * perf_event__synthesize_thread_map() for those events. | |
731 | */ | |
732 | if (target__none(&rec->opts.target)) | |
4ea648ae | 733 | record__synthesize_workload(rec, false); |
be7b0c9e | 734 | } |
ecfd7a9c WN |
735 | return fd; |
736 | } | |
737 | ||
f33cbe72 ACM |
738 | static volatile int workload_exec_errno; |
739 | ||
740 | /* | |
741 | * perf_evlist__prepare_workload will send a SIGUSR1 | |
742 | * if the fork fails, since we asked by setting its | |
743 | * want_signal to true. | |
744 | */ | |
45604710 NK |
745 | static void workload_exec_failed_signal(int signo __maybe_unused, |
746 | siginfo_t *info, | |
f33cbe72 ACM |
747 | void *ucontext __maybe_unused) |
748 | { | |
749 | workload_exec_errno = info->si_value.sival_int; | |
750 | done = 1; | |
f33cbe72 ACM |
751 | child_finished = 1; |
752 | } | |
753 | ||
2dd6d8a1 | 754 | static void snapshot_sig_handler(int sig); |
bfacbe3b | 755 | static void alarm_sig_handler(int sig); |
2dd6d8a1 | 756 | |
46bc29b9 AH |
757 | int __weak |
758 | perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused, | |
759 | struct perf_tool *tool __maybe_unused, | |
760 | perf_event__handler_t process __maybe_unused, | |
761 | struct machine *machine __maybe_unused) | |
762 | { | |
763 | return 0; | |
764 | } | |
765 | ||
ee667f94 WN |
766 | static const struct perf_event_mmap_page * |
767 | perf_evlist__pick_pc(struct perf_evlist *evlist) | |
768 | { | |
b2cb615d WN |
769 | if (evlist) { |
770 | if (evlist->mmap && evlist->mmap[0].base) | |
771 | return evlist->mmap[0].base; | |
772 | if (evlist->backward_mmap && evlist->backward_mmap[0].base) | |
773 | return evlist->backward_mmap[0].base; | |
774 | } | |
ee667f94 WN |
775 | return NULL; |
776 | } | |
777 | ||
c45628b0 WN |
778 | static const struct perf_event_mmap_page *record__pick_pc(struct record *rec) |
779 | { | |
ee667f94 WN |
780 | const struct perf_event_mmap_page *pc; |
781 | ||
782 | pc = perf_evlist__pick_pc(rec->evlist); | |
783 | if (pc) | |
784 | return pc; | |
c45628b0 WN |
785 | return NULL; |
786 | } | |
787 | ||
4ea648ae | 788 | static int record__synthesize(struct record *rec, bool tail) |
c45c86eb WN |
789 | { |
790 | struct perf_session *session = rec->session; | |
791 | struct machine *machine = &session->machines.host; | |
792 | struct perf_data_file *file = &rec->file; | |
793 | struct record_opts *opts = &rec->opts; | |
794 | struct perf_tool *tool = &rec->tool; | |
795 | int fd = perf_data_file__fd(file); | |
796 | int err = 0; | |
797 | ||
4ea648ae WN |
798 | if (rec->opts.tail_synthesize != tail) |
799 | return 0; | |
800 | ||
c45c86eb WN |
801 | if (file->is_pipe) { |
802 | err = perf_event__synthesize_attrs(tool, session, | |
803 | process_synthesized_event); | |
804 | if (err < 0) { | |
805 | pr_err("Couldn't synthesize attrs.\n"); | |
806 | goto out; | |
807 | } | |
808 | ||
809 | if (have_tracepoints(&rec->evlist->entries)) { | |
810 | /* | |
811 | * FIXME err <= 0 here actually means that | |
812 | * there were no tracepoints so its not really | |
813 | * an error, just that we don't need to | |
814 | * synthesize anything. We really have to | |
815 | * return this more properly and also | |
816 | * propagate errors that now are calling die() | |
817 | */ | |
818 | err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist, | |
819 | process_synthesized_event); | |
820 | if (err <= 0) { | |
821 | pr_err("Couldn't record tracing data.\n"); | |
822 | goto out; | |
823 | } | |
824 | rec->bytes_written += err; | |
825 | } | |
826 | } | |
827 | ||
c45628b0 | 828 | err = perf_event__synth_time_conv(record__pick_pc(rec), tool, |
46bc29b9 AH |
829 | process_synthesized_event, machine); |
830 | if (err) | |
831 | goto out; | |
832 | ||
c45c86eb WN |
833 | if (rec->opts.full_auxtrace) { |
834 | err = perf_event__synthesize_auxtrace_info(rec->itr, tool, | |
835 | session, process_synthesized_event); | |
836 | if (err) | |
837 | goto out; | |
838 | } | |
839 | ||
840 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, | |
841 | machine); | |
842 | WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n" | |
843 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
844 | "Check /proc/kallsyms permission or run as root.\n"); | |
845 | ||
846 | err = perf_event__synthesize_modules(tool, process_synthesized_event, | |
847 | machine); | |
848 | WARN_ONCE(err < 0, "Couldn't record kernel module information.\n" | |
849 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
850 | "Check /proc/modules permission or run as root.\n"); | |
851 | ||
852 | if (perf_guest) { | |
853 | machines__process_guests(&session->machines, | |
854 | perf_event__synthesize_guest_os, tool); | |
855 | } | |
856 | ||
857 | err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads, | |
858 | process_synthesized_event, opts->sample_address, | |
859 | opts->proc_map_timeout); | |
860 | out: | |
861 | return err; | |
862 | } | |
863 | ||
8c6f45a7 | 864 | static int __cmd_record(struct record *rec, int argc, const char **argv) |
16c8a109 | 865 | { |
57706abc | 866 | int err; |
45604710 | 867 | int status = 0; |
8b412664 | 868 | unsigned long waking = 0; |
46be604b | 869 | const bool forks = argc > 0; |
23346f21 | 870 | struct machine *machine; |
45694aa7 | 871 | struct perf_tool *tool = &rec->tool; |
b4006796 | 872 | struct record_opts *opts = &rec->opts; |
f5fc1412 | 873 | struct perf_data_file *file = &rec->file; |
d20deb64 | 874 | struct perf_session *session; |
6dcf45ef | 875 | bool disabled = false, draining = false; |
42aa276f | 876 | int fd; |
de9ac07b | 877 | |
d20deb64 | 878 | rec->progname = argv[0]; |
33e49ea7 | 879 | |
45604710 | 880 | atexit(record__sig_exit); |
f5970550 PZ |
881 | signal(SIGCHLD, sig_handler); |
882 | signal(SIGINT, sig_handler); | |
804f7ac7 | 883 | signal(SIGTERM, sig_handler); |
a074865e | 884 | signal(SIGSEGV, sigsegv_handler); |
c0bdc1c4 | 885 | |
f3b3614a HB |
886 | if (rec->opts.record_namespaces) |
887 | tool->namespace_events = true; | |
888 | ||
dc0c6127 | 889 | if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) { |
2dd6d8a1 | 890 | signal(SIGUSR2, snapshot_sig_handler); |
3c1cb7e3 WN |
891 | if (rec->opts.auxtrace_snapshot_mode) |
892 | trigger_on(&auxtrace_snapshot_trigger); | |
dc0c6127 | 893 | if (rec->switch_output.enabled) |
3c1cb7e3 | 894 | trigger_on(&switch_output_trigger); |
c0bdc1c4 | 895 | } else { |
2dd6d8a1 | 896 | signal(SIGUSR2, SIG_IGN); |
c0bdc1c4 | 897 | } |
f5970550 | 898 | |
b7b61cbe | 899 | session = perf_session__new(file, false, tool); |
94c744b6 | 900 | if (session == NULL) { |
ffa91880 | 901 | pr_err("Perf session creation failed.\n"); |
a9a70bbc ACM |
902 | return -1; |
903 | } | |
904 | ||
42aa276f | 905 | fd = perf_data_file__fd(file); |
d20deb64 ACM |
906 | rec->session = session; |
907 | ||
8c6f45a7 | 908 | record__init_features(rec); |
330aa675 | 909 | |
d4db3f16 | 910 | if (forks) { |
3e2be2da | 911 | err = perf_evlist__prepare_workload(rec->evlist, &opts->target, |
f5fc1412 | 912 | argv, file->is_pipe, |
735f7e0b | 913 | workload_exec_failed_signal); |
35b9d88e ACM |
914 | if (err < 0) { |
915 | pr_err("Couldn't run the workload!\n"); | |
45604710 | 916 | status = err; |
35b9d88e | 917 | goto out_delete_session; |
856e9660 | 918 | } |
856e9660 PZ |
919 | } |
920 | ||
8c6f45a7 | 921 | if (record__open(rec) != 0) { |
8d3eca20 | 922 | err = -1; |
45604710 | 923 | goto out_child; |
8d3eca20 | 924 | } |
de9ac07b | 925 | |
8690a2a7 WN |
926 | err = bpf__apply_obj_config(); |
927 | if (err) { | |
928 | char errbuf[BUFSIZ]; | |
929 | ||
930 | bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); | |
931 | pr_err("ERROR: Apply config to BPF failed: %s\n", | |
932 | errbuf); | |
933 | goto out_child; | |
934 | } | |
935 | ||
cca8482c AH |
936 | /* |
937 | * Normally perf_session__new would do this, but it doesn't have the | |
938 | * evlist. | |
939 | */ | |
940 | if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) { | |
941 | pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n"); | |
942 | rec->tool.ordered_events = false; | |
943 | } | |
944 | ||
3e2be2da | 945 | if (!rec->evlist->nr_groups) |
a8bb559b NK |
946 | perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); |
947 | ||
f5fc1412 | 948 | if (file->is_pipe) { |
42aa276f | 949 | err = perf_header__write_pipe(fd); |
529870e3 | 950 | if (err < 0) |
45604710 | 951 | goto out_child; |
563aecb2 | 952 | } else { |
42aa276f | 953 | err = perf_session__write_header(session, rec->evlist, fd, false); |
d5eed904 | 954 | if (err < 0) |
45604710 | 955 | goto out_child; |
56b03f3c ACM |
956 | } |
957 | ||
d3665498 | 958 | if (!rec->no_buildid |
e20960c0 | 959 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
d3665498 | 960 | pr_err("Couldn't generate buildids. " |
e20960c0 | 961 | "Use --no-buildid to profile anyway.\n"); |
8d3eca20 | 962 | err = -1; |
45604710 | 963 | goto out_child; |
e20960c0 RR |
964 | } |
965 | ||
34ba5122 | 966 | machine = &session->machines.host; |
743eb868 | 967 | |
4ea648ae | 968 | err = record__synthesize(rec, false); |
c45c86eb | 969 | if (err < 0) |
45604710 | 970 | goto out_child; |
8d3eca20 | 971 | |
d20deb64 | 972 | if (rec->realtime_prio) { |
de9ac07b PZ |
973 | struct sched_param param; |
974 | ||
d20deb64 | 975 | param.sched_priority = rec->realtime_prio; |
de9ac07b | 976 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
6beba7ad | 977 | pr_err("Could not set realtime priority.\n"); |
8d3eca20 | 978 | err = -1; |
45604710 | 979 | goto out_child; |
de9ac07b PZ |
980 | } |
981 | } | |
982 | ||
774cb499 JO |
983 | /* |
984 | * When perf is starting the traced process, all the events | |
985 | * (apart from group members) have enable_on_exec=1 set, | |
986 | * so don't spoil it by prematurely enabling them. | |
987 | */ | |
6619a53e | 988 | if (!target__none(&opts->target) && !opts->initial_delay) |
3e2be2da | 989 | perf_evlist__enable(rec->evlist); |
764e16a3 | 990 | |
856e9660 PZ |
991 | /* |
992 | * Let the child rip | |
993 | */ | |
e803cf97 | 994 | if (forks) { |
e5bed564 | 995 | union perf_event *event; |
e907caf3 | 996 | pid_t tgid; |
e5bed564 NK |
997 | |
998 | event = malloc(sizeof(event->comm) + machine->id_hdr_size); | |
999 | if (event == NULL) { | |
1000 | err = -ENOMEM; | |
1001 | goto out_child; | |
1002 | } | |
1003 | ||
e803cf97 NK |
1004 | /* |
1005 | * Some H/W events are generated before COMM event | |
1006 | * which is emitted during exec(), so perf script | |
1007 | * cannot see a correct process name for those events. | |
1008 | * Synthesize COMM event to prevent it. | |
1009 | */ | |
e907caf3 HB |
1010 | tgid = perf_event__synthesize_comm(tool, event, |
1011 | rec->evlist->workload.pid, | |
1012 | process_synthesized_event, | |
1013 | machine); | |
1014 | free(event); | |
1015 | ||
1016 | if (tgid == -1) | |
1017 | goto out_child; | |
1018 | ||
1019 | event = malloc(sizeof(event->namespaces) + | |
1020 | (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + | |
1021 | machine->id_hdr_size); | |
1022 | if (event == NULL) { | |
1023 | err = -ENOMEM; | |
1024 | goto out_child; | |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * Synthesize NAMESPACES event for the command specified. | |
1029 | */ | |
1030 | perf_event__synthesize_namespaces(tool, event, | |
1031 | rec->evlist->workload.pid, | |
1032 | tgid, process_synthesized_event, | |
1033 | machine); | |
e5bed564 | 1034 | free(event); |
e803cf97 | 1035 | |
3e2be2da | 1036 | perf_evlist__start_workload(rec->evlist); |
e803cf97 | 1037 | } |
856e9660 | 1038 | |
6619a53e | 1039 | if (opts->initial_delay) { |
0693e680 | 1040 | usleep(opts->initial_delay * USEC_PER_MSEC); |
6619a53e AK |
1041 | perf_evlist__enable(rec->evlist); |
1042 | } | |
1043 | ||
5f9cf599 | 1044 | trigger_ready(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1045 | trigger_ready(&switch_output_trigger); |
a074865e | 1046 | perf_hooks__invoke_record_start(); |
649c48a9 | 1047 | for (;;) { |
9f065194 | 1048 | unsigned long long hits = rec->samples; |
de9ac07b | 1049 | |
05737464 WN |
1050 | /* |
1051 | * rec->evlist->bkw_mmap_state is possible to be | |
1052 | * BKW_MMAP_EMPTY here: when done == true and | |
1053 | * hits != rec->samples in previous round. | |
1054 | * | |
1055 | * perf_evlist__toggle_bkw_mmap ensure we never | |
1056 | * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING. | |
1057 | */ | |
1058 | if (trigger_is_hit(&switch_output_trigger) || done || draining) | |
1059 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING); | |
1060 | ||
8c6f45a7 | 1061 | if (record__mmap_read_all(rec) < 0) { |
5f9cf599 | 1062 | trigger_error(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1063 | trigger_error(&switch_output_trigger); |
8d3eca20 | 1064 | err = -1; |
45604710 | 1065 | goto out_child; |
8d3eca20 | 1066 | } |
de9ac07b | 1067 | |
2dd6d8a1 AH |
1068 | if (auxtrace_record__snapshot_started) { |
1069 | auxtrace_record__snapshot_started = 0; | |
5f9cf599 | 1070 | if (!trigger_is_error(&auxtrace_snapshot_trigger)) |
2dd6d8a1 | 1071 | record__read_auxtrace_snapshot(rec); |
5f9cf599 | 1072 | if (trigger_is_error(&auxtrace_snapshot_trigger)) { |
2dd6d8a1 AH |
1073 | pr_err("AUX area tracing snapshot failed\n"); |
1074 | err = -1; | |
1075 | goto out_child; | |
1076 | } | |
1077 | } | |
1078 | ||
3c1cb7e3 | 1079 | if (trigger_is_hit(&switch_output_trigger)) { |
05737464 WN |
1080 | /* |
1081 | * If switch_output_trigger is hit, the data in | |
1082 | * overwritable ring buffer should have been collected, | |
1083 | * so bkw_mmap_state should be set to BKW_MMAP_EMPTY. | |
1084 | * | |
1085 | * If SIGUSR2 raise after or during record__mmap_read_all(), | |
1086 | * record__mmap_read_all() didn't collect data from | |
1087 | * overwritable ring buffer. Read again. | |
1088 | */ | |
1089 | if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING) | |
1090 | continue; | |
3c1cb7e3 WN |
1091 | trigger_ready(&switch_output_trigger); |
1092 | ||
05737464 WN |
1093 | /* |
1094 | * Reenable events in overwrite ring buffer after | |
1095 | * record__mmap_read_all(): we should have collected | |
1096 | * data from it. | |
1097 | */ | |
1098 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING); | |
1099 | ||
3c1cb7e3 WN |
1100 | if (!quiet) |
1101 | fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n", | |
1102 | waking); | |
1103 | waking = 0; | |
1104 | fd = record__switch_output(rec, false); | |
1105 | if (fd < 0) { | |
1106 | pr_err("Failed to switch to new file\n"); | |
1107 | trigger_error(&switch_output_trigger); | |
1108 | err = fd; | |
1109 | goto out_child; | |
1110 | } | |
bfacbe3b JO |
1111 | |
1112 | /* re-arm the alarm */ | |
1113 | if (rec->switch_output.time) | |
1114 | alarm(rec->switch_output.time); | |
3c1cb7e3 WN |
1115 | } |
1116 | ||
d20deb64 | 1117 | if (hits == rec->samples) { |
6dcf45ef | 1118 | if (done || draining) |
649c48a9 | 1119 | break; |
f66a889d | 1120 | err = perf_evlist__poll(rec->evlist, -1); |
a515114f JO |
1121 | /* |
1122 | * Propagate error, only if there's any. Ignore positive | |
1123 | * number of returned events and interrupt error. | |
1124 | */ | |
1125 | if (err > 0 || (err < 0 && errno == EINTR)) | |
45604710 | 1126 | err = 0; |
8b412664 | 1127 | waking++; |
6dcf45ef ACM |
1128 | |
1129 | if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0) | |
1130 | draining = true; | |
8b412664 PZ |
1131 | } |
1132 | ||
774cb499 JO |
1133 | /* |
1134 | * When perf is starting the traced process, at the end events | |
1135 | * die with the process and we wait for that. Thus no need to | |
1136 | * disable events in this case. | |
1137 | */ | |
602ad878 | 1138 | if (done && !disabled && !target__none(&opts->target)) { |
5f9cf599 | 1139 | trigger_off(&auxtrace_snapshot_trigger); |
3e2be2da | 1140 | perf_evlist__disable(rec->evlist); |
2711926a JO |
1141 | disabled = true; |
1142 | } | |
de9ac07b | 1143 | } |
5f9cf599 | 1144 | trigger_off(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1145 | trigger_off(&switch_output_trigger); |
de9ac07b | 1146 | |
f33cbe72 | 1147 | if (forks && workload_exec_errno) { |
35550da3 | 1148 | char msg[STRERR_BUFSIZE]; |
c8b5f2c9 | 1149 | const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); |
f33cbe72 ACM |
1150 | pr_err("Workload failed: %s\n", emsg); |
1151 | err = -1; | |
45604710 | 1152 | goto out_child; |
f33cbe72 ACM |
1153 | } |
1154 | ||
e3d59112 | 1155 | if (!quiet) |
45604710 | 1156 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
b44308f5 | 1157 | |
4ea648ae WN |
1158 | if (target__none(&rec->opts.target)) |
1159 | record__synthesize_workload(rec, true); | |
1160 | ||
45604710 NK |
1161 | out_child: |
1162 | if (forks) { | |
1163 | int exit_status; | |
addc2785 | 1164 | |
45604710 NK |
1165 | if (!child_finished) |
1166 | kill(rec->evlist->workload.pid, SIGTERM); | |
1167 | ||
1168 | wait(&exit_status); | |
1169 | ||
1170 | if (err < 0) | |
1171 | status = err; | |
1172 | else if (WIFEXITED(exit_status)) | |
1173 | status = WEXITSTATUS(exit_status); | |
1174 | else if (WIFSIGNALED(exit_status)) | |
1175 | signr = WTERMSIG(exit_status); | |
1176 | } else | |
1177 | status = err; | |
1178 | ||
4ea648ae | 1179 | record__synthesize(rec, true); |
e3d59112 NK |
1180 | /* this will be recalculated during process_buildids() */ |
1181 | rec->samples = 0; | |
1182 | ||
ecfd7a9c WN |
1183 | if (!err) { |
1184 | if (!rec->timestamp_filename) { | |
1185 | record__finish_output(rec); | |
1186 | } else { | |
1187 | fd = record__switch_output(rec, true); | |
1188 | if (fd < 0) { | |
1189 | status = fd; | |
1190 | goto out_delete_session; | |
1191 | } | |
1192 | } | |
1193 | } | |
39d17dac | 1194 | |
a074865e WN |
1195 | perf_hooks__invoke_record_end(); |
1196 | ||
e3d59112 NK |
1197 | if (!err && !quiet) { |
1198 | char samples[128]; | |
ecfd7a9c WN |
1199 | const char *postfix = rec->timestamp_filename ? |
1200 | ".<timestamp>" : ""; | |
e3d59112 | 1201 | |
ef149c25 | 1202 | if (rec->samples && !rec->opts.full_auxtrace) |
e3d59112 NK |
1203 | scnprintf(samples, sizeof(samples), |
1204 | " (%" PRIu64 " samples)", rec->samples); | |
1205 | else | |
1206 | samples[0] = '\0'; | |
1207 | ||
ecfd7a9c | 1208 | fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n", |
e3d59112 | 1209 | perf_data_file__size(file) / 1024.0 / 1024.0, |
ecfd7a9c | 1210 | file->path, postfix, samples); |
e3d59112 NK |
1211 | } |
1212 | ||
39d17dac ACM |
1213 | out_delete_session: |
1214 | perf_session__delete(session); | |
45604710 | 1215 | return status; |
de9ac07b | 1216 | } |
0e9b20b8 | 1217 | |
0883e820 | 1218 | static void callchain_debug(struct callchain_param *callchain) |
09b0fd45 | 1219 | { |
aad2b21c | 1220 | static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; |
a601fdff | 1221 | |
0883e820 | 1222 | pr_debug("callchain: type %s\n", str[callchain->record_mode]); |
26d33022 | 1223 | |
0883e820 | 1224 | if (callchain->record_mode == CALLCHAIN_DWARF) |
09b0fd45 | 1225 | pr_debug("callchain: stack dump size %d\n", |
0883e820 | 1226 | callchain->dump_size); |
09b0fd45 JO |
1227 | } |
1228 | ||
0883e820 ACM |
1229 | int record_opts__parse_callchain(struct record_opts *record, |
1230 | struct callchain_param *callchain, | |
1231 | const char *arg, bool unset) | |
09b0fd45 | 1232 | { |
09b0fd45 | 1233 | int ret; |
0883e820 | 1234 | callchain->enabled = !unset; |
eb853e80 | 1235 | |
09b0fd45 JO |
1236 | /* --no-call-graph */ |
1237 | if (unset) { | |
0883e820 | 1238 | callchain->record_mode = CALLCHAIN_NONE; |
09b0fd45 JO |
1239 | pr_debug("callchain: disabled\n"); |
1240 | return 0; | |
1241 | } | |
1242 | ||
0883e820 | 1243 | ret = parse_callchain_record_opt(arg, callchain); |
5c0cf224 JO |
1244 | if (!ret) { |
1245 | /* Enable data address sampling for DWARF unwind. */ | |
0883e820 | 1246 | if (callchain->record_mode == CALLCHAIN_DWARF) |
5c0cf224 | 1247 | record->sample_address = true; |
0883e820 | 1248 | callchain_debug(callchain); |
5c0cf224 | 1249 | } |
26d33022 JO |
1250 | |
1251 | return ret; | |
1252 | } | |
1253 | ||
0883e820 ACM |
1254 | int record_parse_callchain_opt(const struct option *opt, |
1255 | const char *arg, | |
1256 | int unset) | |
1257 | { | |
1258 | return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset); | |
1259 | } | |
1260 | ||
c421e80b | 1261 | int record_callchain_opt(const struct option *opt, |
09b0fd45 JO |
1262 | const char *arg __maybe_unused, |
1263 | int unset __maybe_unused) | |
1264 | { | |
2ddd5c04 | 1265 | struct callchain_param *callchain = opt->value; |
c421e80b | 1266 | |
2ddd5c04 | 1267 | callchain->enabled = true; |
09b0fd45 | 1268 | |
2ddd5c04 ACM |
1269 | if (callchain->record_mode == CALLCHAIN_NONE) |
1270 | callchain->record_mode = CALLCHAIN_FP; | |
eb853e80 | 1271 | |
2ddd5c04 | 1272 | callchain_debug(callchain); |
09b0fd45 JO |
1273 | return 0; |
1274 | } | |
1275 | ||
eb853e80 JO |
1276 | static int perf_record_config(const char *var, const char *value, void *cb) |
1277 | { | |
7a29c087 NK |
1278 | struct record *rec = cb; |
1279 | ||
1280 | if (!strcmp(var, "record.build-id")) { | |
1281 | if (!strcmp(value, "cache")) | |
1282 | rec->no_buildid_cache = false; | |
1283 | else if (!strcmp(value, "no-cache")) | |
1284 | rec->no_buildid_cache = true; | |
1285 | else if (!strcmp(value, "skip")) | |
1286 | rec->no_buildid = true; | |
1287 | else | |
1288 | return -1; | |
1289 | return 0; | |
1290 | } | |
eb853e80 | 1291 | if (!strcmp(var, "record.call-graph")) |
5a2e5e85 | 1292 | var = "call-graph.record-mode"; /* fall-through */ |
eb853e80 JO |
1293 | |
1294 | return perf_default_config(var, value, cb); | |
1295 | } | |
1296 | ||
814c8c38 PZ |
1297 | struct clockid_map { |
1298 | const char *name; | |
1299 | int clockid; | |
1300 | }; | |
1301 | ||
1302 | #define CLOCKID_MAP(n, c) \ | |
1303 | { .name = n, .clockid = (c), } | |
1304 | ||
1305 | #define CLOCKID_END { .name = NULL, } | |
1306 | ||
1307 | ||
1308 | /* | |
1309 | * Add the missing ones, we need to build on many distros... | |
1310 | */ | |
1311 | #ifndef CLOCK_MONOTONIC_RAW | |
1312 | #define CLOCK_MONOTONIC_RAW 4 | |
1313 | #endif | |
1314 | #ifndef CLOCK_BOOTTIME | |
1315 | #define CLOCK_BOOTTIME 7 | |
1316 | #endif | |
1317 | #ifndef CLOCK_TAI | |
1318 | #define CLOCK_TAI 11 | |
1319 | #endif | |
1320 | ||
1321 | static const struct clockid_map clockids[] = { | |
1322 | /* available for all events, NMI safe */ | |
1323 | CLOCKID_MAP("monotonic", CLOCK_MONOTONIC), | |
1324 | CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW), | |
1325 | ||
1326 | /* available for some events */ | |
1327 | CLOCKID_MAP("realtime", CLOCK_REALTIME), | |
1328 | CLOCKID_MAP("boottime", CLOCK_BOOTTIME), | |
1329 | CLOCKID_MAP("tai", CLOCK_TAI), | |
1330 | ||
1331 | /* available for the lazy */ | |
1332 | CLOCKID_MAP("mono", CLOCK_MONOTONIC), | |
1333 | CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW), | |
1334 | CLOCKID_MAP("real", CLOCK_REALTIME), | |
1335 | CLOCKID_MAP("boot", CLOCK_BOOTTIME), | |
1336 | ||
1337 | CLOCKID_END, | |
1338 | }; | |
1339 | ||
1340 | static int parse_clockid(const struct option *opt, const char *str, int unset) | |
1341 | { | |
1342 | struct record_opts *opts = (struct record_opts *)opt->value; | |
1343 | const struct clockid_map *cm; | |
1344 | const char *ostr = str; | |
1345 | ||
1346 | if (unset) { | |
1347 | opts->use_clockid = 0; | |
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | /* no arg passed */ | |
1352 | if (!str) | |
1353 | return 0; | |
1354 | ||
1355 | /* no setting it twice */ | |
1356 | if (opts->use_clockid) | |
1357 | return -1; | |
1358 | ||
1359 | opts->use_clockid = true; | |
1360 | ||
1361 | /* if its a number, we're done */ | |
1362 | if (sscanf(str, "%d", &opts->clockid) == 1) | |
1363 | return 0; | |
1364 | ||
1365 | /* allow a "CLOCK_" prefix to the name */ | |
1366 | if (!strncasecmp(str, "CLOCK_", 6)) | |
1367 | str += 6; | |
1368 | ||
1369 | for (cm = clockids; cm->name; cm++) { | |
1370 | if (!strcasecmp(str, cm->name)) { | |
1371 | opts->clockid = cm->clockid; | |
1372 | return 0; | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | opts->use_clockid = false; | |
1377 | ui__warning("unknown clockid %s, check man page\n", ostr); | |
1378 | return -1; | |
1379 | } | |
1380 | ||
e9db1310 AH |
1381 | static int record__parse_mmap_pages(const struct option *opt, |
1382 | const char *str, | |
1383 | int unset __maybe_unused) | |
1384 | { | |
1385 | struct record_opts *opts = opt->value; | |
1386 | char *s, *p; | |
1387 | unsigned int mmap_pages; | |
1388 | int ret; | |
1389 | ||
1390 | if (!str) | |
1391 | return -EINVAL; | |
1392 | ||
1393 | s = strdup(str); | |
1394 | if (!s) | |
1395 | return -ENOMEM; | |
1396 | ||
1397 | p = strchr(s, ','); | |
1398 | if (p) | |
1399 | *p = '\0'; | |
1400 | ||
1401 | if (*s) { | |
1402 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s); | |
1403 | if (ret) | |
1404 | goto out_free; | |
1405 | opts->mmap_pages = mmap_pages; | |
1406 | } | |
1407 | ||
1408 | if (!p) { | |
1409 | ret = 0; | |
1410 | goto out_free; | |
1411 | } | |
1412 | ||
1413 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1); | |
1414 | if (ret) | |
1415 | goto out_free; | |
1416 | ||
1417 | opts->auxtrace_mmap_pages = mmap_pages; | |
1418 | ||
1419 | out_free: | |
1420 | free(s); | |
1421 | return ret; | |
1422 | } | |
1423 | ||
0c582449 JO |
1424 | static void switch_output_size_warn(struct record *rec) |
1425 | { | |
1426 | u64 wakeup_size = perf_evlist__mmap_size(rec->opts.mmap_pages); | |
1427 | struct switch_output *s = &rec->switch_output; | |
1428 | ||
1429 | wakeup_size /= 2; | |
1430 | ||
1431 | if (s->size < wakeup_size) { | |
1432 | char buf[100]; | |
1433 | ||
1434 | unit_number__scnprintf(buf, sizeof(buf), wakeup_size); | |
1435 | pr_warning("WARNING: switch-output data size lower than " | |
1436 | "wakeup kernel buffer size (%s) " | |
1437 | "expect bigger perf.data sizes\n", buf); | |
1438 | } | |
1439 | } | |
1440 | ||
cb4e1ebb JO |
1441 | static int switch_output_setup(struct record *rec) |
1442 | { | |
1443 | struct switch_output *s = &rec->switch_output; | |
dc0c6127 JO |
1444 | static struct parse_tag tags_size[] = { |
1445 | { .tag = 'B', .mult = 1 }, | |
1446 | { .tag = 'K', .mult = 1 << 10 }, | |
1447 | { .tag = 'M', .mult = 1 << 20 }, | |
1448 | { .tag = 'G', .mult = 1 << 30 }, | |
1449 | { .tag = 0 }, | |
1450 | }; | |
bfacbe3b JO |
1451 | static struct parse_tag tags_time[] = { |
1452 | { .tag = 's', .mult = 1 }, | |
1453 | { .tag = 'm', .mult = 60 }, | |
1454 | { .tag = 'h', .mult = 60*60 }, | |
1455 | { .tag = 'd', .mult = 60*60*24 }, | |
1456 | { .tag = 0 }, | |
1457 | }; | |
dc0c6127 | 1458 | unsigned long val; |
cb4e1ebb JO |
1459 | |
1460 | if (!s->set) | |
1461 | return 0; | |
1462 | ||
1463 | if (!strcmp(s->str, "signal")) { | |
1464 | s->signal = true; | |
1465 | pr_debug("switch-output with SIGUSR2 signal\n"); | |
dc0c6127 JO |
1466 | goto enabled; |
1467 | } | |
1468 | ||
1469 | val = parse_tag_value(s->str, tags_size); | |
1470 | if (val != (unsigned long) -1) { | |
1471 | s->size = val; | |
1472 | pr_debug("switch-output with %s size threshold\n", s->str); | |
1473 | goto enabled; | |
cb4e1ebb JO |
1474 | } |
1475 | ||
bfacbe3b JO |
1476 | val = parse_tag_value(s->str, tags_time); |
1477 | if (val != (unsigned long) -1) { | |
1478 | s->time = val; | |
1479 | pr_debug("switch-output with %s time threshold (%lu seconds)\n", | |
1480 | s->str, s->time); | |
1481 | goto enabled; | |
1482 | } | |
1483 | ||
cb4e1ebb | 1484 | return -1; |
dc0c6127 JO |
1485 | |
1486 | enabled: | |
1487 | rec->timestamp_filename = true; | |
1488 | s->enabled = true; | |
0c582449 JO |
1489 | |
1490 | if (s->size && !rec->opts.no_buffering) | |
1491 | switch_output_size_warn(rec); | |
1492 | ||
dc0c6127 | 1493 | return 0; |
cb4e1ebb JO |
1494 | } |
1495 | ||
e5b2c207 | 1496 | static const char * const __record_usage[] = { |
9e096753 MG |
1497 | "perf record [<options>] [<command>]", |
1498 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
1499 | NULL |
1500 | }; | |
e5b2c207 | 1501 | const char * const *record_usage = __record_usage; |
0e9b20b8 | 1502 | |
d20deb64 | 1503 | /* |
8c6f45a7 ACM |
1504 | * XXX Ideally would be local to cmd_record() and passed to a record__new |
1505 | * because we need to have access to it in record__exit, that is called | |
d20deb64 ACM |
1506 | * after cmd_record() exits, but since record_options need to be accessible to |
1507 | * builtin-script, leave it here. | |
1508 | * | |
1509 | * At least we don't ouch it in all the other functions here directly. | |
1510 | * | |
1511 | * Just say no to tons of global variables, sigh. | |
1512 | */ | |
8c6f45a7 | 1513 | static struct record record = { |
d20deb64 | 1514 | .opts = { |
8affc2b8 | 1515 | .sample_time = true, |
d20deb64 ACM |
1516 | .mmap_pages = UINT_MAX, |
1517 | .user_freq = UINT_MAX, | |
1518 | .user_interval = ULLONG_MAX, | |
447a6013 | 1519 | .freq = 4000, |
d1cb9fce NK |
1520 | .target = { |
1521 | .uses_mmap = true, | |
3aa5939d | 1522 | .default_per_cpu = true, |
d1cb9fce | 1523 | }, |
9d9cad76 | 1524 | .proc_map_timeout = 500, |
d20deb64 | 1525 | }, |
e3d59112 NK |
1526 | .tool = { |
1527 | .sample = process_sample_event, | |
1528 | .fork = perf_event__process_fork, | |
cca8482c | 1529 | .exit = perf_event__process_exit, |
e3d59112 | 1530 | .comm = perf_event__process_comm, |
f3b3614a | 1531 | .namespaces = perf_event__process_namespaces, |
e3d59112 NK |
1532 | .mmap = perf_event__process_mmap, |
1533 | .mmap2 = perf_event__process_mmap2, | |
cca8482c | 1534 | .ordered_events = true, |
e3d59112 | 1535 | }, |
d20deb64 | 1536 | }; |
7865e817 | 1537 | |
76a26549 NK |
1538 | const char record_callchain_help[] = CALLCHAIN_RECORD_HELP |
1539 | "\n\t\t\t\tDefault: fp"; | |
61eaa3be | 1540 | |
0aab2136 WN |
1541 | static bool dry_run; |
1542 | ||
d20deb64 ACM |
1543 | /* |
1544 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
1545 | * with it and switch to use the library functions in perf_evlist that came | |
b4006796 | 1546 | * from builtin-record.c, i.e. use record_opts, |
d20deb64 ACM |
1547 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', |
1548 | * using pipes, etc. | |
1549 | */ | |
efd21307 | 1550 | static struct option __record_options[] = { |
d20deb64 | 1551 | OPT_CALLBACK('e', "event", &record.evlist, "event", |
86847b62 | 1552 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 1553 | parse_events_option), |
d20deb64 | 1554 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
c171b552 | 1555 | "event filter", parse_filter), |
4ba1faa1 WN |
1556 | OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist, |
1557 | NULL, "don't record events from perf itself", | |
1558 | exclude_perf), | |
bea03405 | 1559 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", |
d6d901c2 | 1560 | "record events on existing process id"), |
bea03405 | 1561 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", |
d6d901c2 | 1562 | "record events on existing thread id"), |
d20deb64 | 1563 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
0e9b20b8 | 1564 | "collect data with this RT SCHED_FIFO priority"), |
509051ea | 1565 | OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering, |
acac03fa | 1566 | "collect data without buffering"), |
d20deb64 | 1567 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
daac07b2 | 1568 | "collect raw sample records from all opened counters"), |
bea03405 | 1569 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, |
0e9b20b8 | 1570 | "system-wide collection from all CPUs"), |
bea03405 | 1571 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", |
c45c6ea2 | 1572 | "list of cpus to monitor"), |
d20deb64 | 1573 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
f5fc1412 | 1574 | OPT_STRING('o', "output", &record.file.path, "file", |
abaff32a | 1575 | "output file name"), |
69e7e5b0 AH |
1576 | OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit, |
1577 | &record.opts.no_inherit_set, | |
1578 | "child tasks do not inherit counters"), | |
4ea648ae WN |
1579 | OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize, |
1580 | "synthesize non-sample events at the end of output"), | |
626a6b78 | 1581 | OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"), |
d20deb64 | 1582 | OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"), |
e9db1310 AH |
1583 | OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]", |
1584 | "number of mmap data pages and AUX area tracing mmap pages", | |
1585 | record__parse_mmap_pages), | |
d20deb64 | 1586 | OPT_BOOLEAN(0, "group", &record.opts.group, |
43bece79 | 1587 | "put the counters into a counter group"), |
2ddd5c04 | 1588 | OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, |
09b0fd45 JO |
1589 | NULL, "enables call-graph recording" , |
1590 | &record_callchain_opt), | |
1591 | OPT_CALLBACK(0, "call-graph", &record.opts, | |
76a26549 | 1592 | "record_mode[,record_size]", record_callchain_help, |
09b0fd45 | 1593 | &record_parse_callchain_opt), |
c0555642 | 1594 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 1595 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 1596 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
d20deb64 | 1597 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
649c48a9 | 1598 | "per thread counts"), |
56100321 | 1599 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"), |
b6f35ed7 | 1600 | OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"), |
3abebc55 AH |
1601 | OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time, |
1602 | &record.opts.sample_time_set, | |
1603 | "Record the sample timestamps"), | |
56100321 | 1604 | OPT_BOOLEAN('P', "period", &record.opts.period, "Record the sample period"), |
d20deb64 | 1605 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, |
649c48a9 | 1606 | "don't sample"), |
d2db9a98 WN |
1607 | OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache, |
1608 | &record.no_buildid_cache_set, | |
1609 | "do not update the buildid cache"), | |
1610 | OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid, | |
1611 | &record.no_buildid_set, | |
1612 | "do not collect buildids in perf.data"), | |
d20deb64 | 1613 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
023695d9 SE |
1614 | "monitor event in cgroup name only", |
1615 | parse_cgroups), | |
a6205a35 | 1616 | OPT_UINTEGER('D', "delay", &record.opts.initial_delay, |
6619a53e | 1617 | "ms to wait before starting measurement after program start"), |
bea03405 NK |
1618 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", |
1619 | "user to profile"), | |
a5aabdac SE |
1620 | |
1621 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, | |
1622 | "branch any", "sample any taken branches", | |
1623 | parse_branch_stack), | |
1624 | ||
1625 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, | |
1626 | "branch filter mask", "branch stack filter modes", | |
bdfebd84 | 1627 | parse_branch_stack), |
05484298 AK |
1628 | OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, |
1629 | "sample by weight (on special events only)"), | |
475eeab9 AK |
1630 | OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction, |
1631 | "sample transaction flags (special events only)"), | |
3aa5939d AH |
1632 | OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, |
1633 | "use per-thread mmaps"), | |
bcc84ec6 SE |
1634 | OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register", |
1635 | "sample selected machine registers on interrupt," | |
1636 | " use -I ? to list register names", parse_regs), | |
85c273d2 AK |
1637 | OPT_BOOLEAN(0, "running-time", &record.opts.running_time, |
1638 | "Record running/enabled time of read (:S) events"), | |
814c8c38 PZ |
1639 | OPT_CALLBACK('k', "clockid", &record.opts, |
1640 | "clockid", "clockid to use for events, see clock_gettime()", | |
1641 | parse_clockid), | |
2dd6d8a1 AH |
1642 | OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts, |
1643 | "opts", "AUX area tracing Snapshot Mode", ""), | |
9d9cad76 KL |
1644 | OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout, |
1645 | "per thread proc mmap processing timeout in ms"), | |
f3b3614a HB |
1646 | OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces, |
1647 | "Record namespaces events"), | |
b757bb09 AH |
1648 | OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events, |
1649 | "Record context switch events"), | |
85723885 JO |
1650 | OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel, |
1651 | "Configure all used events to run in kernel space.", | |
1652 | PARSE_OPT_EXCLUSIVE), | |
1653 | OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user, | |
1654 | "Configure all used events to run in user space.", | |
1655 | PARSE_OPT_EXCLUSIVE), | |
71dc2326 WN |
1656 | OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path", |
1657 | "clang binary to use for compiling BPF scriptlets"), | |
1658 | OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options", | |
1659 | "options passed to clang when compiling BPF scriptlets"), | |
7efe0e03 HK |
1660 | OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name, |
1661 | "file", "vmlinux pathname"), | |
6156681b NK |
1662 | OPT_BOOLEAN(0, "buildid-all", &record.buildid_all, |
1663 | "Record build-id of all DSOs regardless of hits"), | |
ecfd7a9c WN |
1664 | OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, |
1665 | "append timestamp to output filename"), | |
cb4e1ebb | 1666 | OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str, |
bfacbe3b JO |
1667 | &record.switch_output.set, "signal,size,time", |
1668 | "Switch output when receive SIGUSR2 or cross size,time threshold", | |
dc0c6127 | 1669 | "signal"), |
0aab2136 WN |
1670 | OPT_BOOLEAN(0, "dry-run", &dry_run, |
1671 | "Parse options then exit"), | |
0e9b20b8 IM |
1672 | OPT_END() |
1673 | }; | |
1674 | ||
e5b2c207 NK |
1675 | struct option *record_options = __record_options; |
1676 | ||
b0ad8ea6 | 1677 | int cmd_record(int argc, const char **argv) |
0e9b20b8 | 1678 | { |
ef149c25 | 1679 | int err; |
8c6f45a7 | 1680 | struct record *rec = &record; |
16ad2ffb | 1681 | char errbuf[BUFSIZ]; |
0e9b20b8 | 1682 | |
48e1cab1 WN |
1683 | #ifndef HAVE_LIBBPF_SUPPORT |
1684 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c) | |
1685 | set_nobuild('\0', "clang-path", true); | |
1686 | set_nobuild('\0', "clang-opt", true); | |
1687 | # undef set_nobuild | |
7efe0e03 HK |
1688 | #endif |
1689 | ||
1690 | #ifndef HAVE_BPF_PROLOGUE | |
1691 | # if !defined (HAVE_DWARF_SUPPORT) | |
1692 | # define REASON "NO_DWARF=1" | |
1693 | # elif !defined (HAVE_LIBBPF_SUPPORT) | |
1694 | # define REASON "NO_LIBBPF=1" | |
1695 | # else | |
1696 | # define REASON "this architecture doesn't support BPF prologue" | |
1697 | # endif | |
1698 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c) | |
1699 | set_nobuild('\0', "vmlinux", true); | |
1700 | # undef set_nobuild | |
1701 | # undef REASON | |
48e1cab1 WN |
1702 | #endif |
1703 | ||
3e2be2da ACM |
1704 | rec->evlist = perf_evlist__new(); |
1705 | if (rec->evlist == NULL) | |
361c99a6 ACM |
1706 | return -ENOMEM; |
1707 | ||
ecc4c561 ACM |
1708 | err = perf_config(perf_record_config, rec); |
1709 | if (err) | |
1710 | return err; | |
eb853e80 | 1711 | |
bca647aa | 1712 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 1713 | PARSE_OPT_STOP_AT_NON_OPTION); |
68ba3235 NK |
1714 | if (quiet) |
1715 | perf_quiet_option(); | |
483635a9 JO |
1716 | |
1717 | /* Make system wide (-a) the default target. */ | |
602ad878 | 1718 | if (!argc && target__none(&rec->opts.target)) |
483635a9 | 1719 | rec->opts.target.system_wide = true; |
0e9b20b8 | 1720 | |
bea03405 | 1721 | if (nr_cgroups && !rec->opts.target.system_wide) { |
c7118369 NK |
1722 | usage_with_options_msg(record_usage, record_options, |
1723 | "cgroup monitoring only available in system-wide mode"); | |
1724 | ||
023695d9 | 1725 | } |
b757bb09 AH |
1726 | if (rec->opts.record_switch_events && |
1727 | !perf_can_record_switch_events()) { | |
c7118369 NK |
1728 | ui__error("kernel does not support recording context switch events\n"); |
1729 | parse_options_usage(record_usage, record_options, "switch-events", 0); | |
1730 | return -EINVAL; | |
b757bb09 | 1731 | } |
023695d9 | 1732 | |
cb4e1ebb JO |
1733 | if (switch_output_setup(rec)) { |
1734 | parse_options_usage(record_usage, record_options, "switch-output", 0); | |
1735 | return -EINVAL; | |
1736 | } | |
1737 | ||
bfacbe3b JO |
1738 | if (rec->switch_output.time) { |
1739 | signal(SIGALRM, alarm_sig_handler); | |
1740 | alarm(rec->switch_output.time); | |
1741 | } | |
1742 | ||
ef149c25 AH |
1743 | if (!rec->itr) { |
1744 | rec->itr = auxtrace_record__init(rec->evlist, &err); | |
1745 | if (err) | |
5c01ad60 | 1746 | goto out; |
ef149c25 AH |
1747 | } |
1748 | ||
2dd6d8a1 AH |
1749 | err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts, |
1750 | rec->opts.auxtrace_snapshot_opts); | |
1751 | if (err) | |
5c01ad60 | 1752 | goto out; |
2dd6d8a1 | 1753 | |
1b36c03e AH |
1754 | /* |
1755 | * Allow aliases to facilitate the lookup of symbols for address | |
1756 | * filters. Refer to auxtrace_parse_filters(). | |
1757 | */ | |
1758 | symbol_conf.allow_aliases = true; | |
1759 | ||
1760 | symbol__init(NULL); | |
1761 | ||
1762 | err = auxtrace_parse_filters(rec->evlist); | |
1763 | if (err) | |
1764 | goto out; | |
1765 | ||
0aab2136 | 1766 | if (dry_run) |
5c01ad60 | 1767 | goto out; |
0aab2136 | 1768 | |
d7888573 WN |
1769 | err = bpf__setup_stdout(rec->evlist); |
1770 | if (err) { | |
1771 | bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf)); | |
1772 | pr_err("ERROR: Setup BPF stdout failed: %s\n", | |
1773 | errbuf); | |
5c01ad60 | 1774 | goto out; |
d7888573 WN |
1775 | } |
1776 | ||
ef149c25 AH |
1777 | err = -ENOMEM; |
1778 | ||
ec80fde7 | 1779 | if (symbol_conf.kptr_restrict) |
646aaea6 ACM |
1780 | pr_warning( |
1781 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
1782 | "check /proc/sys/kernel/kptr_restrict.\n\n" | |
1783 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
1784 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
1785 | "Samples in kernel modules won't be resolved at all.\n\n" | |
1786 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
1787 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
ec80fde7 | 1788 | |
0c1d46a8 | 1789 | if (rec->no_buildid_cache || rec->no_buildid) { |
a1ac1d3c | 1790 | disable_buildid_cache(); |
dc0c6127 | 1791 | } else if (rec->switch_output.enabled) { |
0c1d46a8 WN |
1792 | /* |
1793 | * In 'perf record --switch-output', disable buildid | |
1794 | * generation by default to reduce data file switching | |
1795 | * overhead. Still generate buildid if they are required | |
1796 | * explicitly using | |
1797 | * | |
60437ac0 | 1798 | * perf record --switch-output --no-no-buildid \ |
0c1d46a8 WN |
1799 | * --no-no-buildid-cache |
1800 | * | |
1801 | * Following code equals to: | |
1802 | * | |
1803 | * if ((rec->no_buildid || !rec->no_buildid_set) && | |
1804 | * (rec->no_buildid_cache || !rec->no_buildid_cache_set)) | |
1805 | * disable_buildid_cache(); | |
1806 | */ | |
1807 | bool disable = true; | |
1808 | ||
1809 | if (rec->no_buildid_set && !rec->no_buildid) | |
1810 | disable = false; | |
1811 | if (rec->no_buildid_cache_set && !rec->no_buildid_cache) | |
1812 | disable = false; | |
1813 | if (disable) { | |
1814 | rec->no_buildid = true; | |
1815 | rec->no_buildid_cache = true; | |
1816 | disable_buildid_cache(); | |
1817 | } | |
1818 | } | |
655000e7 | 1819 | |
4ea648ae WN |
1820 | if (record.opts.overwrite) |
1821 | record.opts.tail_synthesize = true; | |
1822 | ||
3e2be2da ACM |
1823 | if (rec->evlist->nr_entries == 0 && |
1824 | perf_evlist__add_default(rec->evlist) < 0) { | |
69aad6f1 | 1825 | pr_err("Not enough memory for event selector list\n"); |
394c01ed | 1826 | goto out; |
bbd36e5e | 1827 | } |
0e9b20b8 | 1828 | |
69e7e5b0 AH |
1829 | if (rec->opts.target.tid && !rec->opts.no_inherit_set) |
1830 | rec->opts.no_inherit = true; | |
1831 | ||
602ad878 | 1832 | err = target__validate(&rec->opts.target); |
16ad2ffb | 1833 | if (err) { |
602ad878 | 1834 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
16ad2ffb NK |
1835 | ui__warning("%s", errbuf); |
1836 | } | |
1837 | ||
602ad878 | 1838 | err = target__parse_uid(&rec->opts.target); |
16ad2ffb NK |
1839 | if (err) { |
1840 | int saved_errno = errno; | |
4bd0f2d2 | 1841 | |
602ad878 | 1842 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
3780f488 | 1843 | ui__error("%s", errbuf); |
16ad2ffb NK |
1844 | |
1845 | err = -saved_errno; | |
394c01ed | 1846 | goto out; |
16ad2ffb | 1847 | } |
0d37aa34 | 1848 | |
23dc4f15 JO |
1849 | /* Enable ignoring missing threads when -u option is defined. */ |
1850 | rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX; | |
1851 | ||
16ad2ffb | 1852 | err = -ENOMEM; |
3e2be2da | 1853 | if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0) |
dd7927f4 | 1854 | usage_with_options(record_usage, record_options); |
69aad6f1 | 1855 | |
ef149c25 AH |
1856 | err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts); |
1857 | if (err) | |
394c01ed | 1858 | goto out; |
ef149c25 | 1859 | |
6156681b NK |
1860 | /* |
1861 | * We take all buildids when the file contains | |
1862 | * AUX area tracing data because we do not decode the | |
1863 | * trace because it would take too long. | |
1864 | */ | |
1865 | if (rec->opts.full_auxtrace) | |
1866 | rec->buildid_all = true; | |
1867 | ||
b4006796 | 1868 | if (record_opts__config(&rec->opts)) { |
39d17dac | 1869 | err = -EINVAL; |
394c01ed | 1870 | goto out; |
7e4ff9e3 MG |
1871 | } |
1872 | ||
d20deb64 | 1873 | err = __cmd_record(&record, argc, argv); |
394c01ed | 1874 | out: |
45604710 | 1875 | perf_evlist__delete(rec->evlist); |
d65a458b | 1876 | symbol__exit(); |
ef149c25 | 1877 | auxtrace_record__free(rec->itr); |
39d17dac | 1878 | return err; |
0e9b20b8 | 1879 | } |
2dd6d8a1 AH |
1880 | |
1881 | static void snapshot_sig_handler(int sig __maybe_unused) | |
1882 | { | |
dc0c6127 JO |
1883 | struct record *rec = &record; |
1884 | ||
5f9cf599 WN |
1885 | if (trigger_is_ready(&auxtrace_snapshot_trigger)) { |
1886 | trigger_hit(&auxtrace_snapshot_trigger); | |
1887 | auxtrace_record__snapshot_started = 1; | |
1888 | if (auxtrace_record__snapshot_start(record.itr)) | |
1889 | trigger_error(&auxtrace_snapshot_trigger); | |
1890 | } | |
3c1cb7e3 | 1891 | |
dc0c6127 | 1892 | if (switch_output_signal(rec)) |
3c1cb7e3 | 1893 | trigger_hit(&switch_output_trigger); |
2dd6d8a1 | 1894 | } |
bfacbe3b JO |
1895 | |
1896 | static void alarm_sig_handler(int sig __maybe_unused) | |
1897 | { | |
1898 | struct record *rec = &record; | |
1899 | ||
1900 | if (switch_output_time(rec)) | |
1901 | trigger_hit(&switch_output_trigger); | |
1902 | } |