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" |
d8871ea7 | 41 | #include "asm/bug.h" |
7c6a1c65 | 42 | |
97124d5e | 43 | #include <unistd.h> |
de9ac07b | 44 | #include <sched.h> |
a41794cd | 45 | #include <sys/mman.h> |
2d11c650 | 46 | #include <asm/bug.h> |
0693e680 | 47 | #include <linux/time64.h> |
78da39fa | 48 | |
8c6f45a7 | 49 | struct record { |
45694aa7 | 50 | struct perf_tool tool; |
b4006796 | 51 | struct record_opts opts; |
d20deb64 | 52 | u64 bytes_written; |
f5fc1412 | 53 | struct perf_data_file file; |
ef149c25 | 54 | struct auxtrace_record *itr; |
d20deb64 ACM |
55 | struct perf_evlist *evlist; |
56 | struct perf_session *session; | |
57 | const char *progname; | |
d20deb64 | 58 | int realtime_prio; |
d20deb64 | 59 | bool no_buildid; |
d2db9a98 | 60 | bool no_buildid_set; |
d20deb64 | 61 | bool no_buildid_cache; |
d2db9a98 | 62 | bool no_buildid_cache_set; |
6156681b | 63 | bool buildid_all; |
ecfd7a9c | 64 | bool timestamp_filename; |
3c1cb7e3 | 65 | bool switch_output; |
9f065194 | 66 | unsigned long long samples; |
0f82ebc4 | 67 | }; |
a21ca2ca | 68 | |
8c6f45a7 | 69 | static int record__write(struct record *rec, void *bf, size_t size) |
f5970550 | 70 | { |
cf8b2e69 | 71 | if (perf_data_file__write(rec->session->file, bf, size) < 0) { |
50a9b868 JO |
72 | pr_err("failed to write perf data, error: %m\n"); |
73 | return -1; | |
f5970550 | 74 | } |
8d3eca20 | 75 | |
cf8b2e69 | 76 | rec->bytes_written += size; |
8d3eca20 | 77 | return 0; |
f5970550 PZ |
78 | } |
79 | ||
45694aa7 | 80 | static int process_synthesized_event(struct perf_tool *tool, |
d20deb64 | 81 | union perf_event *event, |
1d037ca1 IT |
82 | struct perf_sample *sample __maybe_unused, |
83 | struct machine *machine __maybe_unused) | |
234fbbf5 | 84 | { |
8c6f45a7 ACM |
85 | struct record *rec = container_of(tool, struct record, tool); |
86 | return record__write(rec, event, event->header.size); | |
234fbbf5 ACM |
87 | } |
88 | ||
3a62a7b8 WN |
89 | static int |
90 | backward_rb_find_range(void *buf, int mask, u64 head, u64 *start, u64 *end) | |
91 | { | |
92 | struct perf_event_header *pheader; | |
93 | u64 evt_head = head; | |
94 | int size = mask + 1; | |
95 | ||
96 | pr_debug2("backward_rb_find_range: buf=%p, head=%"PRIx64"\n", buf, head); | |
97 | pheader = (struct perf_event_header *)(buf + (head & mask)); | |
98 | *start = head; | |
99 | while (true) { | |
100 | if (evt_head - head >= (unsigned int)size) { | |
5e30d55c | 101 | pr_debug("Finished reading backward ring buffer: rewind\n"); |
3a62a7b8 WN |
102 | if (evt_head - head > (unsigned int)size) |
103 | evt_head -= pheader->size; | |
104 | *end = evt_head; | |
105 | return 0; | |
106 | } | |
107 | ||
108 | pheader = (struct perf_event_header *)(buf + (evt_head & mask)); | |
109 | ||
110 | if (pheader->size == 0) { | |
5e30d55c | 111 | pr_debug("Finished reading backward ring buffer: get start\n"); |
3a62a7b8 WN |
112 | *end = evt_head; |
113 | return 0; | |
114 | } | |
115 | ||
116 | evt_head += pheader->size; | |
117 | pr_debug3("move evt_head: %"PRIx64"\n", evt_head); | |
118 | } | |
119 | WARN_ONCE(1, "Shouldn't get here\n"); | |
120 | return -1; | |
121 | } | |
122 | ||
123 | static int | |
a4ea0ec4 WN |
124 | rb_find_range(void *data, int mask, u64 head, u64 old, |
125 | u64 *start, u64 *end, bool backward) | |
3a62a7b8 | 126 | { |
a4ea0ec4 | 127 | if (!backward) { |
3a62a7b8 WN |
128 | *start = old; |
129 | *end = head; | |
130 | return 0; | |
131 | } | |
132 | ||
133 | return backward_rb_find_range(data, mask, head, start, end); | |
134 | } | |
135 | ||
a4ea0ec4 WN |
136 | static int |
137 | record__mmap_read(struct record *rec, struct perf_mmap *md, | |
138 | bool overwrite, bool backward) | |
de9ac07b | 139 | { |
7b8283b5 DA |
140 | u64 head = perf_mmap__read_head(md); |
141 | u64 old = md->prev; | |
09fa4f40 | 142 | u64 end = head, start = old; |
918512b4 | 143 | unsigned char *data = md->base + page_size; |
de9ac07b PZ |
144 | unsigned long size; |
145 | void *buf; | |
8d3eca20 | 146 | int rc = 0; |
de9ac07b | 147 | |
a4ea0ec4 WN |
148 | if (rb_find_range(data, md->mask, head, |
149 | old, &start, &end, backward)) | |
3a62a7b8 WN |
150 | return -1; |
151 | ||
09fa4f40 | 152 | if (start == end) |
8d3eca20 | 153 | return 0; |
dc82009a | 154 | |
d20deb64 | 155 | rec->samples++; |
de9ac07b | 156 | |
09fa4f40 | 157 | size = end - start; |
2d11c650 WN |
158 | if (size > (unsigned long)(md->mask) + 1) { |
159 | WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n"); | |
160 | ||
161 | md->prev = head; | |
a4ea0ec4 | 162 | perf_mmap__consume(md, overwrite || backward); |
2d11c650 WN |
163 | return 0; |
164 | } | |
de9ac07b | 165 | |
09fa4f40 WN |
166 | if ((start & md->mask) + size != (end & md->mask)) { |
167 | buf = &data[start & md->mask]; | |
168 | size = md->mask + 1 - (start & md->mask); | |
169 | start += size; | |
021e9f47 | 170 | |
8c6f45a7 | 171 | if (record__write(rec, buf, size) < 0) { |
8d3eca20 DA |
172 | rc = -1; |
173 | goto out; | |
174 | } | |
de9ac07b PZ |
175 | } |
176 | ||
09fa4f40 WN |
177 | buf = &data[start & md->mask]; |
178 | size = end - start; | |
179 | start += size; | |
021e9f47 | 180 | |
8c6f45a7 | 181 | if (record__write(rec, buf, size) < 0) { |
8d3eca20 DA |
182 | rc = -1; |
183 | goto out; | |
184 | } | |
de9ac07b | 185 | |
09fa4f40 | 186 | md->prev = head; |
a4ea0ec4 | 187 | perf_mmap__consume(md, overwrite || backward); |
8d3eca20 DA |
188 | out: |
189 | return rc; | |
de9ac07b PZ |
190 | } |
191 | ||
2dd6d8a1 AH |
192 | static volatile int done; |
193 | static volatile int signr = -1; | |
194 | static volatile int child_finished; | |
c0bdc1c4 | 195 | |
2dd6d8a1 | 196 | static volatile int auxtrace_record__snapshot_started; |
5f9cf599 | 197 | static DEFINE_TRIGGER(auxtrace_snapshot_trigger); |
3c1cb7e3 | 198 | static DEFINE_TRIGGER(switch_output_trigger); |
2dd6d8a1 AH |
199 | |
200 | static void sig_handler(int sig) | |
201 | { | |
202 | if (sig == SIGCHLD) | |
203 | child_finished = 1; | |
204 | else | |
205 | signr = sig; | |
206 | ||
207 | done = 1; | |
208 | } | |
209 | ||
a074865e WN |
210 | static void sigsegv_handler(int sig) |
211 | { | |
212 | perf_hooks__recover(); | |
213 | sighandler_dump_stack(sig); | |
214 | } | |
215 | ||
2dd6d8a1 AH |
216 | static void record__sig_exit(void) |
217 | { | |
218 | if (signr == -1) | |
219 | return; | |
220 | ||
221 | signal(signr, SIG_DFL); | |
222 | raise(signr); | |
223 | } | |
224 | ||
e31f0d01 AH |
225 | #ifdef HAVE_AUXTRACE_SUPPORT |
226 | ||
ef149c25 AH |
227 | static int record__process_auxtrace(struct perf_tool *tool, |
228 | union perf_event *event, void *data1, | |
229 | size_t len1, void *data2, size_t len2) | |
230 | { | |
231 | struct record *rec = container_of(tool, struct record, tool); | |
99fa2984 | 232 | struct perf_data_file *file = &rec->file; |
ef149c25 AH |
233 | size_t padding; |
234 | u8 pad[8] = {0}; | |
235 | ||
99fa2984 AH |
236 | if (!perf_data_file__is_pipe(file)) { |
237 | off_t file_offset; | |
238 | int fd = perf_data_file__fd(file); | |
239 | int err; | |
240 | ||
241 | file_offset = lseek(fd, 0, SEEK_CUR); | |
242 | if (file_offset == -1) | |
243 | return -1; | |
244 | err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index, | |
245 | event, file_offset); | |
246 | if (err) | |
247 | return err; | |
248 | } | |
249 | ||
ef149c25 AH |
250 | /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */ |
251 | padding = (len1 + len2) & 7; | |
252 | if (padding) | |
253 | padding = 8 - padding; | |
254 | ||
255 | record__write(rec, event, event->header.size); | |
256 | record__write(rec, data1, len1); | |
257 | if (len2) | |
258 | record__write(rec, data2, len2); | |
259 | record__write(rec, &pad, padding); | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | static int record__auxtrace_mmap_read(struct record *rec, | |
265 | struct auxtrace_mmap *mm) | |
266 | { | |
267 | int ret; | |
268 | ||
269 | ret = auxtrace_mmap__read(mm, rec->itr, &rec->tool, | |
270 | record__process_auxtrace); | |
271 | if (ret < 0) | |
272 | return ret; | |
273 | ||
274 | if (ret) | |
275 | rec->samples++; | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
2dd6d8a1 AH |
280 | static int record__auxtrace_mmap_read_snapshot(struct record *rec, |
281 | struct auxtrace_mmap *mm) | |
282 | { | |
283 | int ret; | |
284 | ||
285 | ret = auxtrace_mmap__read_snapshot(mm, rec->itr, &rec->tool, | |
286 | record__process_auxtrace, | |
287 | rec->opts.auxtrace_snapshot_size); | |
288 | if (ret < 0) | |
289 | return ret; | |
290 | ||
291 | if (ret) | |
292 | rec->samples++; | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
297 | static int record__auxtrace_read_snapshot_all(struct record *rec) | |
298 | { | |
299 | int i; | |
300 | int rc = 0; | |
301 | ||
302 | for (i = 0; i < rec->evlist->nr_mmaps; i++) { | |
303 | struct auxtrace_mmap *mm = | |
304 | &rec->evlist->mmap[i].auxtrace_mmap; | |
305 | ||
306 | if (!mm->base) | |
307 | continue; | |
308 | ||
309 | if (record__auxtrace_mmap_read_snapshot(rec, mm) != 0) { | |
310 | rc = -1; | |
311 | goto out; | |
312 | } | |
313 | } | |
314 | out: | |
315 | return rc; | |
316 | } | |
317 | ||
318 | static void record__read_auxtrace_snapshot(struct record *rec) | |
319 | { | |
320 | pr_debug("Recording AUX area tracing snapshot\n"); | |
321 | if (record__auxtrace_read_snapshot_all(rec) < 0) { | |
5f9cf599 | 322 | trigger_error(&auxtrace_snapshot_trigger); |
2dd6d8a1 | 323 | } else { |
5f9cf599 WN |
324 | if (auxtrace_record__snapshot_finish(rec->itr)) |
325 | trigger_error(&auxtrace_snapshot_trigger); | |
326 | else | |
327 | trigger_ready(&auxtrace_snapshot_trigger); | |
2dd6d8a1 AH |
328 | } |
329 | } | |
330 | ||
e31f0d01 AH |
331 | #else |
332 | ||
333 | static inline | |
334 | int record__auxtrace_mmap_read(struct record *rec __maybe_unused, | |
335 | struct auxtrace_mmap *mm __maybe_unused) | |
336 | { | |
337 | return 0; | |
338 | } | |
339 | ||
2dd6d8a1 AH |
340 | static inline |
341 | void record__read_auxtrace_snapshot(struct record *rec __maybe_unused) | |
de9ac07b | 342 | { |
f7b7c26e PZ |
343 | } |
344 | ||
2dd6d8a1 AH |
345 | static inline |
346 | int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused) | |
f7b7c26e | 347 | { |
2dd6d8a1 | 348 | return 0; |
de9ac07b PZ |
349 | } |
350 | ||
2dd6d8a1 AH |
351 | #endif |
352 | ||
cda57a8c WN |
353 | static int record__mmap_evlist(struct record *rec, |
354 | struct perf_evlist *evlist) | |
355 | { | |
356 | struct record_opts *opts = &rec->opts; | |
357 | char msg[512]; | |
358 | ||
359 | if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false, | |
360 | opts->auxtrace_mmap_pages, | |
361 | opts->auxtrace_snapshot_mode) < 0) { | |
362 | if (errno == EPERM) { | |
363 | pr_err("Permission error mapping pages.\n" | |
364 | "Consider increasing " | |
365 | "/proc/sys/kernel/perf_event_mlock_kb,\n" | |
366 | "or try again with a smaller value of -m/--mmap_pages.\n" | |
367 | "(current value: %u,%u)\n", | |
368 | opts->mmap_pages, opts->auxtrace_mmap_pages); | |
369 | return -errno; | |
370 | } else { | |
371 | pr_err("failed to mmap with %d (%s)\n", errno, | |
c8b5f2c9 | 372 | str_error_r(errno, msg, sizeof(msg))); |
cda57a8c WN |
373 | if (errno) |
374 | return -errno; | |
375 | else | |
376 | return -EINVAL; | |
377 | } | |
378 | } | |
379 | return 0; | |
380 | } | |
381 | ||
382 | static int record__mmap(struct record *rec) | |
383 | { | |
384 | return record__mmap_evlist(rec, rec->evlist); | |
385 | } | |
386 | ||
8c6f45a7 | 387 | static int record__open(struct record *rec) |
dd7927f4 | 388 | { |
56e52e85 | 389 | char msg[512]; |
6a4bb04c | 390 | struct perf_evsel *pos; |
d20deb64 ACM |
391 | struct perf_evlist *evlist = rec->evlist; |
392 | struct perf_session *session = rec->session; | |
b4006796 | 393 | struct record_opts *opts = &rec->opts; |
5d8bb1ec | 394 | struct perf_evsel_config_term *err_term; |
8d3eca20 | 395 | int rc = 0; |
dd7927f4 | 396 | |
e68ae9cf | 397 | perf_evlist__config(evlist, opts, &callchain_param); |
cac21425 | 398 | |
e5cadb93 | 399 | evlist__for_each_entry(evlist, pos) { |
dd7927f4 | 400 | try_again: |
d988d5ee | 401 | if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) { |
56e52e85 | 402 | if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) { |
d6d901c2 | 403 | if (verbose) |
c0a54341 | 404 | ui__warning("%s\n", msg); |
d6d901c2 ZY |
405 | goto try_again; |
406 | } | |
ca6a4258 | 407 | |
56e52e85 ACM |
408 | rc = -errno; |
409 | perf_evsel__open_strerror(pos, &opts->target, | |
410 | errno, msg, sizeof(msg)); | |
411 | ui__error("%s\n", msg); | |
8d3eca20 | 412 | goto out; |
c171b552 LZ |
413 | } |
414 | } | |
a43d3f08 | 415 | |
23d4aad4 ACM |
416 | if (perf_evlist__apply_filters(evlist, &pos)) { |
417 | error("failed to set filter \"%s\" on event %s with %d (%s)\n", | |
418 | pos->filter, perf_evsel__name(pos), errno, | |
c8b5f2c9 | 419 | str_error_r(errno, msg, sizeof(msg))); |
8d3eca20 | 420 | rc = -1; |
5d8bb1ec MP |
421 | goto out; |
422 | } | |
423 | ||
424 | if (perf_evlist__apply_drv_configs(evlist, &pos, &err_term)) { | |
425 | error("failed to set config \"%s\" on event %s with %d (%s)\n", | |
426 | err_term->val.drv_cfg, perf_evsel__name(pos), errno, | |
427 | str_error_r(errno, msg, sizeof(msg))); | |
428 | rc = -1; | |
8d3eca20 | 429 | goto out; |
0a102479 FW |
430 | } |
431 | ||
cda57a8c WN |
432 | rc = record__mmap(rec); |
433 | if (rc) | |
8d3eca20 | 434 | goto out; |
0a27d7f9 | 435 | |
563aecb2 | 436 | session->evlist = evlist; |
7b56cce2 | 437 | perf_session__set_id_hdr_size(session); |
8d3eca20 DA |
438 | out: |
439 | return rc; | |
16c8a109 PZ |
440 | } |
441 | ||
e3d59112 NK |
442 | static int process_sample_event(struct perf_tool *tool, |
443 | union perf_event *event, | |
444 | struct perf_sample *sample, | |
445 | struct perf_evsel *evsel, | |
446 | struct machine *machine) | |
447 | { | |
448 | struct record *rec = container_of(tool, struct record, tool); | |
449 | ||
450 | rec->samples++; | |
451 | ||
452 | return build_id__mark_dso_hit(tool, event, sample, evsel, machine); | |
453 | } | |
454 | ||
8c6f45a7 | 455 | static int process_buildids(struct record *rec) |
6122e4e4 | 456 | { |
f5fc1412 JO |
457 | struct perf_data_file *file = &rec->file; |
458 | struct perf_session *session = rec->session; | |
6122e4e4 | 459 | |
457ae94a | 460 | if (file->size == 0) |
9f591fd7 ACM |
461 | return 0; |
462 | ||
00dc8657 NK |
463 | /* |
464 | * During this process, it'll load kernel map and replace the | |
465 | * dso->long_name to a real pathname it found. In this case | |
466 | * we prefer the vmlinux path like | |
467 | * /lib/modules/3.16.4/build/vmlinux | |
468 | * | |
469 | * rather than build-id path (in debug directory). | |
470 | * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 | |
471 | */ | |
472 | symbol_conf.ignore_vmlinux_buildid = true; | |
473 | ||
6156681b NK |
474 | /* |
475 | * If --buildid-all is given, it marks all DSO regardless of hits, | |
476 | * so no need to process samples. | |
477 | */ | |
478 | if (rec->buildid_all) | |
479 | rec->tool.sample = NULL; | |
480 | ||
b7b61cbe | 481 | return perf_session__process_events(session); |
6122e4e4 ACM |
482 | } |
483 | ||
8115d60c | 484 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
485 | { |
486 | int err; | |
45694aa7 | 487 | struct perf_tool *tool = data; |
a1645ce1 ZY |
488 | /* |
489 | *As for guest kernel when processing subcommand record&report, | |
490 | *we arrange module mmap prior to guest kernel mmap and trigger | |
491 | *a preload dso because default guest module symbols are loaded | |
492 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
493 | *method is used to avoid symbol missing when the first addr is | |
494 | *in module instead of in guest kernel. | |
495 | */ | |
45694aa7 | 496 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 497 | machine); |
a1645ce1 ZY |
498 | if (err < 0) |
499 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 500 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 501 | |
a1645ce1 ZY |
502 | /* |
503 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
504 | * have no _text sometimes. | |
505 | */ | |
45694aa7 | 506 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
0ae617be | 507 | machine); |
a1645ce1 ZY |
508 | if (err < 0) |
509 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 510 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
511 | } |
512 | ||
98402807 FW |
513 | static struct perf_event_header finished_round_event = { |
514 | .size = sizeof(struct perf_event_header), | |
515 | .type = PERF_RECORD_FINISHED_ROUND, | |
516 | }; | |
517 | ||
a4ea0ec4 WN |
518 | static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist, |
519 | bool backward) | |
98402807 | 520 | { |
dcabb507 | 521 | u64 bytes_written = rec->bytes_written; |
0e2e63dd | 522 | int i; |
8d3eca20 | 523 | int rc = 0; |
a4ea0ec4 | 524 | struct perf_mmap *maps; |
98402807 | 525 | |
cb21686b WN |
526 | if (!evlist) |
527 | return 0; | |
ef149c25 | 528 | |
b2cb615d | 529 | maps = backward ? evlist->backward_mmap : evlist->mmap; |
a4ea0ec4 WN |
530 | if (!maps) |
531 | return 0; | |
532 | ||
54cc54de WN |
533 | if (backward && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING) |
534 | return 0; | |
535 | ||
cb21686b | 536 | for (i = 0; i < evlist->nr_mmaps; i++) { |
a4ea0ec4 | 537 | struct auxtrace_mmap *mm = &maps[i].auxtrace_mmap; |
cb21686b | 538 | |
a4ea0ec4 WN |
539 | if (maps[i].base) { |
540 | if (record__mmap_read(rec, &maps[i], | |
541 | evlist->overwrite, backward) != 0) { | |
8d3eca20 DA |
542 | rc = -1; |
543 | goto out; | |
544 | } | |
545 | } | |
ef149c25 | 546 | |
2dd6d8a1 | 547 | if (mm->base && !rec->opts.auxtrace_snapshot_mode && |
ef149c25 AH |
548 | record__auxtrace_mmap_read(rec, mm) != 0) { |
549 | rc = -1; | |
550 | goto out; | |
551 | } | |
98402807 FW |
552 | } |
553 | ||
dcabb507 JO |
554 | /* |
555 | * Mark the round finished in case we wrote | |
556 | * at least one event. | |
557 | */ | |
558 | if (bytes_written != rec->bytes_written) | |
559 | rc = record__write(rec, &finished_round_event, sizeof(finished_round_event)); | |
8d3eca20 | 560 | |
54cc54de WN |
561 | if (backward) |
562 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); | |
8d3eca20 DA |
563 | out: |
564 | return rc; | |
98402807 FW |
565 | } |
566 | ||
cb21686b WN |
567 | static int record__mmap_read_all(struct record *rec) |
568 | { | |
569 | int err; | |
570 | ||
a4ea0ec4 | 571 | err = record__mmap_read_evlist(rec, rec->evlist, false); |
cb21686b WN |
572 | if (err) |
573 | return err; | |
574 | ||
05737464 | 575 | return record__mmap_read_evlist(rec, rec->evlist, true); |
cb21686b WN |
576 | } |
577 | ||
8c6f45a7 | 578 | static void record__init_features(struct record *rec) |
57706abc | 579 | { |
57706abc DA |
580 | struct perf_session *session = rec->session; |
581 | int feat; | |
582 | ||
583 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) | |
584 | perf_header__set_feat(&session->header, feat); | |
585 | ||
586 | if (rec->no_buildid) | |
587 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); | |
588 | ||
3e2be2da | 589 | if (!have_tracepoints(&rec->evlist->entries)) |
57706abc DA |
590 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
591 | ||
592 | if (!rec->opts.branch_stack) | |
593 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); | |
ef149c25 AH |
594 | |
595 | if (!rec->opts.full_auxtrace) | |
596 | perf_header__clear_feat(&session->header, HEADER_AUXTRACE); | |
ffa517ad JO |
597 | |
598 | perf_header__clear_feat(&session->header, HEADER_STAT); | |
57706abc DA |
599 | } |
600 | ||
e1ab48ba WN |
601 | static void |
602 | record__finish_output(struct record *rec) | |
603 | { | |
604 | struct perf_data_file *file = &rec->file; | |
605 | int fd = perf_data_file__fd(file); | |
606 | ||
607 | if (file->is_pipe) | |
608 | return; | |
609 | ||
610 | rec->session->header.data_size += rec->bytes_written; | |
611 | file->size = lseek(perf_data_file__fd(file), 0, SEEK_CUR); | |
612 | ||
613 | if (!rec->no_buildid) { | |
614 | process_buildids(rec); | |
615 | ||
616 | if (rec->buildid_all) | |
617 | dsos__hit_all(rec->session); | |
618 | } | |
619 | perf_session__write_header(rec->session, rec->evlist, fd, true); | |
620 | ||
621 | return; | |
622 | } | |
623 | ||
4ea648ae | 624 | static int record__synthesize_workload(struct record *rec, bool tail) |
be7b0c9e WN |
625 | { |
626 | struct { | |
627 | struct thread_map map; | |
628 | struct thread_map_data map_data; | |
629 | } thread_map; | |
630 | ||
4ea648ae WN |
631 | if (rec->opts.tail_synthesize != tail) |
632 | return 0; | |
633 | ||
be7b0c9e WN |
634 | thread_map.map.nr = 1; |
635 | thread_map.map.map[0].pid = rec->evlist->workload.pid; | |
636 | thread_map.map.map[0].comm = NULL; | |
637 | return perf_event__synthesize_thread_map(&rec->tool, &thread_map.map, | |
638 | process_synthesized_event, | |
639 | &rec->session->machines.host, | |
640 | rec->opts.sample_address, | |
641 | rec->opts.proc_map_timeout); | |
642 | } | |
643 | ||
4ea648ae | 644 | static int record__synthesize(struct record *rec, bool tail); |
3c1cb7e3 | 645 | |
ecfd7a9c WN |
646 | static int |
647 | record__switch_output(struct record *rec, bool at_exit) | |
648 | { | |
649 | struct perf_data_file *file = &rec->file; | |
650 | int fd, err; | |
651 | ||
652 | /* Same Size: "2015122520103046"*/ | |
653 | char timestamp[] = "InvalidTimestamp"; | |
654 | ||
4ea648ae WN |
655 | record__synthesize(rec, true); |
656 | if (target__none(&rec->opts.target)) | |
657 | record__synthesize_workload(rec, true); | |
658 | ||
ecfd7a9c WN |
659 | rec->samples = 0; |
660 | record__finish_output(rec); | |
661 | err = fetch_current_timestamp(timestamp, sizeof(timestamp)); | |
662 | if (err) { | |
663 | pr_err("Failed to get current timestamp\n"); | |
664 | return -EINVAL; | |
665 | } | |
666 | ||
667 | fd = perf_data_file__switch(file, timestamp, | |
668 | rec->session->header.data_offset, | |
669 | at_exit); | |
670 | if (fd >= 0 && !at_exit) { | |
671 | rec->bytes_written = 0; | |
672 | rec->session->header.data_size = 0; | |
673 | } | |
674 | ||
675 | if (!quiet) | |
676 | fprintf(stderr, "[ perf record: Dump %s.%s ]\n", | |
677 | file->path, timestamp); | |
3c1cb7e3 WN |
678 | |
679 | /* Output tracking events */ | |
be7b0c9e | 680 | if (!at_exit) { |
4ea648ae | 681 | record__synthesize(rec, false); |
3c1cb7e3 | 682 | |
be7b0c9e WN |
683 | /* |
684 | * In 'perf record --switch-output' without -a, | |
685 | * record__synthesize() in record__switch_output() won't | |
686 | * generate tracking events because there's no thread_map | |
687 | * in evlist. Which causes newly created perf.data doesn't | |
688 | * contain map and comm information. | |
689 | * Create a fake thread_map and directly call | |
690 | * perf_event__synthesize_thread_map() for those events. | |
691 | */ | |
692 | if (target__none(&rec->opts.target)) | |
4ea648ae | 693 | record__synthesize_workload(rec, false); |
be7b0c9e | 694 | } |
ecfd7a9c WN |
695 | return fd; |
696 | } | |
697 | ||
f33cbe72 ACM |
698 | static volatile int workload_exec_errno; |
699 | ||
700 | /* | |
701 | * perf_evlist__prepare_workload will send a SIGUSR1 | |
702 | * if the fork fails, since we asked by setting its | |
703 | * want_signal to true. | |
704 | */ | |
45604710 NK |
705 | static void workload_exec_failed_signal(int signo __maybe_unused, |
706 | siginfo_t *info, | |
f33cbe72 ACM |
707 | void *ucontext __maybe_unused) |
708 | { | |
709 | workload_exec_errno = info->si_value.sival_int; | |
710 | done = 1; | |
f33cbe72 ACM |
711 | child_finished = 1; |
712 | } | |
713 | ||
2dd6d8a1 AH |
714 | static void snapshot_sig_handler(int sig); |
715 | ||
46bc29b9 AH |
716 | int __weak |
717 | perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused, | |
718 | struct perf_tool *tool __maybe_unused, | |
719 | perf_event__handler_t process __maybe_unused, | |
720 | struct machine *machine __maybe_unused) | |
721 | { | |
722 | return 0; | |
723 | } | |
724 | ||
ee667f94 WN |
725 | static const struct perf_event_mmap_page * |
726 | perf_evlist__pick_pc(struct perf_evlist *evlist) | |
727 | { | |
b2cb615d WN |
728 | if (evlist) { |
729 | if (evlist->mmap && evlist->mmap[0].base) | |
730 | return evlist->mmap[0].base; | |
731 | if (evlist->backward_mmap && evlist->backward_mmap[0].base) | |
732 | return evlist->backward_mmap[0].base; | |
733 | } | |
ee667f94 WN |
734 | return NULL; |
735 | } | |
736 | ||
c45628b0 WN |
737 | static const struct perf_event_mmap_page *record__pick_pc(struct record *rec) |
738 | { | |
ee667f94 WN |
739 | const struct perf_event_mmap_page *pc; |
740 | ||
741 | pc = perf_evlist__pick_pc(rec->evlist); | |
742 | if (pc) | |
743 | return pc; | |
c45628b0 WN |
744 | return NULL; |
745 | } | |
746 | ||
4ea648ae | 747 | static int record__synthesize(struct record *rec, bool tail) |
c45c86eb WN |
748 | { |
749 | struct perf_session *session = rec->session; | |
750 | struct machine *machine = &session->machines.host; | |
751 | struct perf_data_file *file = &rec->file; | |
752 | struct record_opts *opts = &rec->opts; | |
753 | struct perf_tool *tool = &rec->tool; | |
754 | int fd = perf_data_file__fd(file); | |
755 | int err = 0; | |
756 | ||
4ea648ae WN |
757 | if (rec->opts.tail_synthesize != tail) |
758 | return 0; | |
759 | ||
c45c86eb WN |
760 | if (file->is_pipe) { |
761 | err = perf_event__synthesize_attrs(tool, session, | |
762 | process_synthesized_event); | |
763 | if (err < 0) { | |
764 | pr_err("Couldn't synthesize attrs.\n"); | |
765 | goto out; | |
766 | } | |
767 | ||
768 | if (have_tracepoints(&rec->evlist->entries)) { | |
769 | /* | |
770 | * FIXME err <= 0 here actually means that | |
771 | * there were no tracepoints so its not really | |
772 | * an error, just that we don't need to | |
773 | * synthesize anything. We really have to | |
774 | * return this more properly and also | |
775 | * propagate errors that now are calling die() | |
776 | */ | |
777 | err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist, | |
778 | process_synthesized_event); | |
779 | if (err <= 0) { | |
780 | pr_err("Couldn't record tracing data.\n"); | |
781 | goto out; | |
782 | } | |
783 | rec->bytes_written += err; | |
784 | } | |
785 | } | |
786 | ||
c45628b0 | 787 | err = perf_event__synth_time_conv(record__pick_pc(rec), tool, |
46bc29b9 AH |
788 | process_synthesized_event, machine); |
789 | if (err) | |
790 | goto out; | |
791 | ||
c45c86eb WN |
792 | if (rec->opts.full_auxtrace) { |
793 | err = perf_event__synthesize_auxtrace_info(rec->itr, tool, | |
794 | session, process_synthesized_event); | |
795 | if (err) | |
796 | goto out; | |
797 | } | |
798 | ||
799 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, | |
800 | machine); | |
801 | WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n" | |
802 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
803 | "Check /proc/kallsyms permission or run as root.\n"); | |
804 | ||
805 | err = perf_event__synthesize_modules(tool, process_synthesized_event, | |
806 | machine); | |
807 | WARN_ONCE(err < 0, "Couldn't record kernel module information.\n" | |
808 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
809 | "Check /proc/modules permission or run as root.\n"); | |
810 | ||
811 | if (perf_guest) { | |
812 | machines__process_guests(&session->machines, | |
813 | perf_event__synthesize_guest_os, tool); | |
814 | } | |
815 | ||
816 | err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads, | |
817 | process_synthesized_event, opts->sample_address, | |
818 | opts->proc_map_timeout); | |
819 | out: | |
820 | return err; | |
821 | } | |
822 | ||
8c6f45a7 | 823 | static int __cmd_record(struct record *rec, int argc, const char **argv) |
16c8a109 | 824 | { |
57706abc | 825 | int err; |
45604710 | 826 | int status = 0; |
8b412664 | 827 | unsigned long waking = 0; |
46be604b | 828 | const bool forks = argc > 0; |
23346f21 | 829 | struct machine *machine; |
45694aa7 | 830 | struct perf_tool *tool = &rec->tool; |
b4006796 | 831 | struct record_opts *opts = &rec->opts; |
f5fc1412 | 832 | struct perf_data_file *file = &rec->file; |
d20deb64 | 833 | struct perf_session *session; |
6dcf45ef | 834 | bool disabled = false, draining = false; |
42aa276f | 835 | int fd; |
de9ac07b | 836 | |
d20deb64 | 837 | rec->progname = argv[0]; |
33e49ea7 | 838 | |
45604710 | 839 | atexit(record__sig_exit); |
f5970550 PZ |
840 | signal(SIGCHLD, sig_handler); |
841 | signal(SIGINT, sig_handler); | |
804f7ac7 | 842 | signal(SIGTERM, sig_handler); |
a074865e | 843 | signal(SIGSEGV, sigsegv_handler); |
c0bdc1c4 | 844 | |
3c1cb7e3 | 845 | if (rec->opts.auxtrace_snapshot_mode || rec->switch_output) { |
2dd6d8a1 | 846 | signal(SIGUSR2, snapshot_sig_handler); |
3c1cb7e3 WN |
847 | if (rec->opts.auxtrace_snapshot_mode) |
848 | trigger_on(&auxtrace_snapshot_trigger); | |
849 | if (rec->switch_output) | |
850 | trigger_on(&switch_output_trigger); | |
c0bdc1c4 | 851 | } else { |
2dd6d8a1 | 852 | signal(SIGUSR2, SIG_IGN); |
c0bdc1c4 | 853 | } |
f5970550 | 854 | |
b7b61cbe | 855 | session = perf_session__new(file, false, tool); |
94c744b6 | 856 | if (session == NULL) { |
ffa91880 | 857 | pr_err("Perf session creation failed.\n"); |
a9a70bbc ACM |
858 | return -1; |
859 | } | |
860 | ||
42aa276f | 861 | fd = perf_data_file__fd(file); |
d20deb64 ACM |
862 | rec->session = session; |
863 | ||
8c6f45a7 | 864 | record__init_features(rec); |
330aa675 | 865 | |
d4db3f16 | 866 | if (forks) { |
3e2be2da | 867 | err = perf_evlist__prepare_workload(rec->evlist, &opts->target, |
f5fc1412 | 868 | argv, file->is_pipe, |
735f7e0b | 869 | workload_exec_failed_signal); |
35b9d88e ACM |
870 | if (err < 0) { |
871 | pr_err("Couldn't run the workload!\n"); | |
45604710 | 872 | status = err; |
35b9d88e | 873 | goto out_delete_session; |
856e9660 | 874 | } |
856e9660 PZ |
875 | } |
876 | ||
8c6f45a7 | 877 | if (record__open(rec) != 0) { |
8d3eca20 | 878 | err = -1; |
45604710 | 879 | goto out_child; |
8d3eca20 | 880 | } |
de9ac07b | 881 | |
8690a2a7 WN |
882 | err = bpf__apply_obj_config(); |
883 | if (err) { | |
884 | char errbuf[BUFSIZ]; | |
885 | ||
886 | bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); | |
887 | pr_err("ERROR: Apply config to BPF failed: %s\n", | |
888 | errbuf); | |
889 | goto out_child; | |
890 | } | |
891 | ||
cca8482c AH |
892 | /* |
893 | * Normally perf_session__new would do this, but it doesn't have the | |
894 | * evlist. | |
895 | */ | |
896 | if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) { | |
897 | pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n"); | |
898 | rec->tool.ordered_events = false; | |
899 | } | |
900 | ||
3e2be2da | 901 | if (!rec->evlist->nr_groups) |
a8bb559b NK |
902 | perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); |
903 | ||
f5fc1412 | 904 | if (file->is_pipe) { |
42aa276f | 905 | err = perf_header__write_pipe(fd); |
529870e3 | 906 | if (err < 0) |
45604710 | 907 | goto out_child; |
563aecb2 | 908 | } else { |
42aa276f | 909 | err = perf_session__write_header(session, rec->evlist, fd, false); |
d5eed904 | 910 | if (err < 0) |
45604710 | 911 | goto out_child; |
56b03f3c ACM |
912 | } |
913 | ||
d3665498 | 914 | if (!rec->no_buildid |
e20960c0 | 915 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
d3665498 | 916 | pr_err("Couldn't generate buildids. " |
e20960c0 | 917 | "Use --no-buildid to profile anyway.\n"); |
8d3eca20 | 918 | err = -1; |
45604710 | 919 | goto out_child; |
e20960c0 RR |
920 | } |
921 | ||
34ba5122 | 922 | machine = &session->machines.host; |
743eb868 | 923 | |
4ea648ae | 924 | err = record__synthesize(rec, false); |
c45c86eb | 925 | if (err < 0) |
45604710 | 926 | goto out_child; |
8d3eca20 | 927 | |
d20deb64 | 928 | if (rec->realtime_prio) { |
de9ac07b PZ |
929 | struct sched_param param; |
930 | ||
d20deb64 | 931 | param.sched_priority = rec->realtime_prio; |
de9ac07b | 932 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
6beba7ad | 933 | pr_err("Could not set realtime priority.\n"); |
8d3eca20 | 934 | err = -1; |
45604710 | 935 | goto out_child; |
de9ac07b PZ |
936 | } |
937 | } | |
938 | ||
774cb499 JO |
939 | /* |
940 | * When perf is starting the traced process, all the events | |
941 | * (apart from group members) have enable_on_exec=1 set, | |
942 | * so don't spoil it by prematurely enabling them. | |
943 | */ | |
6619a53e | 944 | if (!target__none(&opts->target) && !opts->initial_delay) |
3e2be2da | 945 | perf_evlist__enable(rec->evlist); |
764e16a3 | 946 | |
856e9660 PZ |
947 | /* |
948 | * Let the child rip | |
949 | */ | |
e803cf97 | 950 | if (forks) { |
e5bed564 NK |
951 | union perf_event *event; |
952 | ||
953 | event = malloc(sizeof(event->comm) + machine->id_hdr_size); | |
954 | if (event == NULL) { | |
955 | err = -ENOMEM; | |
956 | goto out_child; | |
957 | } | |
958 | ||
e803cf97 NK |
959 | /* |
960 | * Some H/W events are generated before COMM event | |
961 | * which is emitted during exec(), so perf script | |
962 | * cannot see a correct process name for those events. | |
963 | * Synthesize COMM event to prevent it. | |
964 | */ | |
e5bed564 | 965 | perf_event__synthesize_comm(tool, event, |
e803cf97 NK |
966 | rec->evlist->workload.pid, |
967 | process_synthesized_event, | |
968 | machine); | |
e5bed564 | 969 | free(event); |
e803cf97 | 970 | |
3e2be2da | 971 | perf_evlist__start_workload(rec->evlist); |
e803cf97 | 972 | } |
856e9660 | 973 | |
6619a53e | 974 | if (opts->initial_delay) { |
0693e680 | 975 | usleep(opts->initial_delay * USEC_PER_MSEC); |
6619a53e AK |
976 | perf_evlist__enable(rec->evlist); |
977 | } | |
978 | ||
5f9cf599 | 979 | trigger_ready(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 980 | trigger_ready(&switch_output_trigger); |
a074865e | 981 | perf_hooks__invoke_record_start(); |
649c48a9 | 982 | for (;;) { |
9f065194 | 983 | unsigned long long hits = rec->samples; |
de9ac07b | 984 | |
05737464 WN |
985 | /* |
986 | * rec->evlist->bkw_mmap_state is possible to be | |
987 | * BKW_MMAP_EMPTY here: when done == true and | |
988 | * hits != rec->samples in previous round. | |
989 | * | |
990 | * perf_evlist__toggle_bkw_mmap ensure we never | |
991 | * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING. | |
992 | */ | |
993 | if (trigger_is_hit(&switch_output_trigger) || done || draining) | |
994 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING); | |
995 | ||
8c6f45a7 | 996 | if (record__mmap_read_all(rec) < 0) { |
5f9cf599 | 997 | trigger_error(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 998 | trigger_error(&switch_output_trigger); |
8d3eca20 | 999 | err = -1; |
45604710 | 1000 | goto out_child; |
8d3eca20 | 1001 | } |
de9ac07b | 1002 | |
2dd6d8a1 AH |
1003 | if (auxtrace_record__snapshot_started) { |
1004 | auxtrace_record__snapshot_started = 0; | |
5f9cf599 | 1005 | if (!trigger_is_error(&auxtrace_snapshot_trigger)) |
2dd6d8a1 | 1006 | record__read_auxtrace_snapshot(rec); |
5f9cf599 | 1007 | if (trigger_is_error(&auxtrace_snapshot_trigger)) { |
2dd6d8a1 AH |
1008 | pr_err("AUX area tracing snapshot failed\n"); |
1009 | err = -1; | |
1010 | goto out_child; | |
1011 | } | |
1012 | } | |
1013 | ||
3c1cb7e3 | 1014 | if (trigger_is_hit(&switch_output_trigger)) { |
05737464 WN |
1015 | /* |
1016 | * If switch_output_trigger is hit, the data in | |
1017 | * overwritable ring buffer should have been collected, | |
1018 | * so bkw_mmap_state should be set to BKW_MMAP_EMPTY. | |
1019 | * | |
1020 | * If SIGUSR2 raise after or during record__mmap_read_all(), | |
1021 | * record__mmap_read_all() didn't collect data from | |
1022 | * overwritable ring buffer. Read again. | |
1023 | */ | |
1024 | if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING) | |
1025 | continue; | |
3c1cb7e3 WN |
1026 | trigger_ready(&switch_output_trigger); |
1027 | ||
05737464 WN |
1028 | /* |
1029 | * Reenable events in overwrite ring buffer after | |
1030 | * record__mmap_read_all(): we should have collected | |
1031 | * data from it. | |
1032 | */ | |
1033 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING); | |
1034 | ||
3c1cb7e3 WN |
1035 | if (!quiet) |
1036 | fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n", | |
1037 | waking); | |
1038 | waking = 0; | |
1039 | fd = record__switch_output(rec, false); | |
1040 | if (fd < 0) { | |
1041 | pr_err("Failed to switch to new file\n"); | |
1042 | trigger_error(&switch_output_trigger); | |
1043 | err = fd; | |
1044 | goto out_child; | |
1045 | } | |
1046 | } | |
1047 | ||
d20deb64 | 1048 | if (hits == rec->samples) { |
6dcf45ef | 1049 | if (done || draining) |
649c48a9 | 1050 | break; |
f66a889d | 1051 | err = perf_evlist__poll(rec->evlist, -1); |
a515114f JO |
1052 | /* |
1053 | * Propagate error, only if there's any. Ignore positive | |
1054 | * number of returned events and interrupt error. | |
1055 | */ | |
1056 | if (err > 0 || (err < 0 && errno == EINTR)) | |
45604710 | 1057 | err = 0; |
8b412664 | 1058 | waking++; |
6dcf45ef ACM |
1059 | |
1060 | if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0) | |
1061 | draining = true; | |
8b412664 PZ |
1062 | } |
1063 | ||
774cb499 JO |
1064 | /* |
1065 | * When perf is starting the traced process, at the end events | |
1066 | * die with the process and we wait for that. Thus no need to | |
1067 | * disable events in this case. | |
1068 | */ | |
602ad878 | 1069 | if (done && !disabled && !target__none(&opts->target)) { |
5f9cf599 | 1070 | trigger_off(&auxtrace_snapshot_trigger); |
3e2be2da | 1071 | perf_evlist__disable(rec->evlist); |
2711926a JO |
1072 | disabled = true; |
1073 | } | |
de9ac07b | 1074 | } |
5f9cf599 | 1075 | trigger_off(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1076 | trigger_off(&switch_output_trigger); |
de9ac07b | 1077 | |
f33cbe72 | 1078 | if (forks && workload_exec_errno) { |
35550da3 | 1079 | char msg[STRERR_BUFSIZE]; |
c8b5f2c9 | 1080 | const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); |
f33cbe72 ACM |
1081 | pr_err("Workload failed: %s\n", emsg); |
1082 | err = -1; | |
45604710 | 1083 | goto out_child; |
f33cbe72 ACM |
1084 | } |
1085 | ||
e3d59112 | 1086 | if (!quiet) |
45604710 | 1087 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
b44308f5 | 1088 | |
4ea648ae WN |
1089 | if (target__none(&rec->opts.target)) |
1090 | record__synthesize_workload(rec, true); | |
1091 | ||
45604710 NK |
1092 | out_child: |
1093 | if (forks) { | |
1094 | int exit_status; | |
addc2785 | 1095 | |
45604710 NK |
1096 | if (!child_finished) |
1097 | kill(rec->evlist->workload.pid, SIGTERM); | |
1098 | ||
1099 | wait(&exit_status); | |
1100 | ||
1101 | if (err < 0) | |
1102 | status = err; | |
1103 | else if (WIFEXITED(exit_status)) | |
1104 | status = WEXITSTATUS(exit_status); | |
1105 | else if (WIFSIGNALED(exit_status)) | |
1106 | signr = WTERMSIG(exit_status); | |
1107 | } else | |
1108 | status = err; | |
1109 | ||
4ea648ae | 1110 | record__synthesize(rec, true); |
e3d59112 NK |
1111 | /* this will be recalculated during process_buildids() */ |
1112 | rec->samples = 0; | |
1113 | ||
ecfd7a9c WN |
1114 | if (!err) { |
1115 | if (!rec->timestamp_filename) { | |
1116 | record__finish_output(rec); | |
1117 | } else { | |
1118 | fd = record__switch_output(rec, true); | |
1119 | if (fd < 0) { | |
1120 | status = fd; | |
1121 | goto out_delete_session; | |
1122 | } | |
1123 | } | |
1124 | } | |
39d17dac | 1125 | |
a074865e WN |
1126 | perf_hooks__invoke_record_end(); |
1127 | ||
e3d59112 NK |
1128 | if (!err && !quiet) { |
1129 | char samples[128]; | |
ecfd7a9c WN |
1130 | const char *postfix = rec->timestamp_filename ? |
1131 | ".<timestamp>" : ""; | |
e3d59112 | 1132 | |
ef149c25 | 1133 | if (rec->samples && !rec->opts.full_auxtrace) |
e3d59112 NK |
1134 | scnprintf(samples, sizeof(samples), |
1135 | " (%" PRIu64 " samples)", rec->samples); | |
1136 | else | |
1137 | samples[0] = '\0'; | |
1138 | ||
ecfd7a9c | 1139 | fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n", |
e3d59112 | 1140 | perf_data_file__size(file) / 1024.0 / 1024.0, |
ecfd7a9c | 1141 | file->path, postfix, samples); |
e3d59112 NK |
1142 | } |
1143 | ||
39d17dac ACM |
1144 | out_delete_session: |
1145 | perf_session__delete(session); | |
45604710 | 1146 | return status; |
de9ac07b | 1147 | } |
0e9b20b8 | 1148 | |
0883e820 | 1149 | static void callchain_debug(struct callchain_param *callchain) |
09b0fd45 | 1150 | { |
aad2b21c | 1151 | static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; |
a601fdff | 1152 | |
0883e820 | 1153 | pr_debug("callchain: type %s\n", str[callchain->record_mode]); |
26d33022 | 1154 | |
0883e820 | 1155 | if (callchain->record_mode == CALLCHAIN_DWARF) |
09b0fd45 | 1156 | pr_debug("callchain: stack dump size %d\n", |
0883e820 | 1157 | callchain->dump_size); |
09b0fd45 JO |
1158 | } |
1159 | ||
0883e820 ACM |
1160 | int record_opts__parse_callchain(struct record_opts *record, |
1161 | struct callchain_param *callchain, | |
1162 | const char *arg, bool unset) | |
09b0fd45 | 1163 | { |
09b0fd45 | 1164 | int ret; |
0883e820 | 1165 | callchain->enabled = !unset; |
eb853e80 | 1166 | |
09b0fd45 JO |
1167 | /* --no-call-graph */ |
1168 | if (unset) { | |
0883e820 | 1169 | callchain->record_mode = CALLCHAIN_NONE; |
09b0fd45 JO |
1170 | pr_debug("callchain: disabled\n"); |
1171 | return 0; | |
1172 | } | |
1173 | ||
0883e820 | 1174 | ret = parse_callchain_record_opt(arg, callchain); |
5c0cf224 JO |
1175 | if (!ret) { |
1176 | /* Enable data address sampling for DWARF unwind. */ | |
0883e820 | 1177 | if (callchain->record_mode == CALLCHAIN_DWARF) |
5c0cf224 | 1178 | record->sample_address = true; |
0883e820 | 1179 | callchain_debug(callchain); |
5c0cf224 | 1180 | } |
26d33022 JO |
1181 | |
1182 | return ret; | |
1183 | } | |
1184 | ||
0883e820 ACM |
1185 | int record_parse_callchain_opt(const struct option *opt, |
1186 | const char *arg, | |
1187 | int unset) | |
1188 | { | |
1189 | return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset); | |
1190 | } | |
1191 | ||
c421e80b | 1192 | int record_callchain_opt(const struct option *opt, |
09b0fd45 JO |
1193 | const char *arg __maybe_unused, |
1194 | int unset __maybe_unused) | |
1195 | { | |
2ddd5c04 | 1196 | struct callchain_param *callchain = opt->value; |
c421e80b | 1197 | |
2ddd5c04 | 1198 | callchain->enabled = true; |
09b0fd45 | 1199 | |
2ddd5c04 ACM |
1200 | if (callchain->record_mode == CALLCHAIN_NONE) |
1201 | callchain->record_mode = CALLCHAIN_FP; | |
eb853e80 | 1202 | |
2ddd5c04 | 1203 | callchain_debug(callchain); |
09b0fd45 JO |
1204 | return 0; |
1205 | } | |
1206 | ||
eb853e80 JO |
1207 | static int perf_record_config(const char *var, const char *value, void *cb) |
1208 | { | |
7a29c087 NK |
1209 | struct record *rec = cb; |
1210 | ||
1211 | if (!strcmp(var, "record.build-id")) { | |
1212 | if (!strcmp(value, "cache")) | |
1213 | rec->no_buildid_cache = false; | |
1214 | else if (!strcmp(value, "no-cache")) | |
1215 | rec->no_buildid_cache = true; | |
1216 | else if (!strcmp(value, "skip")) | |
1217 | rec->no_buildid = true; | |
1218 | else | |
1219 | return -1; | |
1220 | return 0; | |
1221 | } | |
eb853e80 | 1222 | if (!strcmp(var, "record.call-graph")) |
5a2e5e85 | 1223 | var = "call-graph.record-mode"; /* fall-through */ |
eb853e80 JO |
1224 | |
1225 | return perf_default_config(var, value, cb); | |
1226 | } | |
1227 | ||
814c8c38 PZ |
1228 | struct clockid_map { |
1229 | const char *name; | |
1230 | int clockid; | |
1231 | }; | |
1232 | ||
1233 | #define CLOCKID_MAP(n, c) \ | |
1234 | { .name = n, .clockid = (c), } | |
1235 | ||
1236 | #define CLOCKID_END { .name = NULL, } | |
1237 | ||
1238 | ||
1239 | /* | |
1240 | * Add the missing ones, we need to build on many distros... | |
1241 | */ | |
1242 | #ifndef CLOCK_MONOTONIC_RAW | |
1243 | #define CLOCK_MONOTONIC_RAW 4 | |
1244 | #endif | |
1245 | #ifndef CLOCK_BOOTTIME | |
1246 | #define CLOCK_BOOTTIME 7 | |
1247 | #endif | |
1248 | #ifndef CLOCK_TAI | |
1249 | #define CLOCK_TAI 11 | |
1250 | #endif | |
1251 | ||
1252 | static const struct clockid_map clockids[] = { | |
1253 | /* available for all events, NMI safe */ | |
1254 | CLOCKID_MAP("monotonic", CLOCK_MONOTONIC), | |
1255 | CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW), | |
1256 | ||
1257 | /* available for some events */ | |
1258 | CLOCKID_MAP("realtime", CLOCK_REALTIME), | |
1259 | CLOCKID_MAP("boottime", CLOCK_BOOTTIME), | |
1260 | CLOCKID_MAP("tai", CLOCK_TAI), | |
1261 | ||
1262 | /* available for the lazy */ | |
1263 | CLOCKID_MAP("mono", CLOCK_MONOTONIC), | |
1264 | CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW), | |
1265 | CLOCKID_MAP("real", CLOCK_REALTIME), | |
1266 | CLOCKID_MAP("boot", CLOCK_BOOTTIME), | |
1267 | ||
1268 | CLOCKID_END, | |
1269 | }; | |
1270 | ||
1271 | static int parse_clockid(const struct option *opt, const char *str, int unset) | |
1272 | { | |
1273 | struct record_opts *opts = (struct record_opts *)opt->value; | |
1274 | const struct clockid_map *cm; | |
1275 | const char *ostr = str; | |
1276 | ||
1277 | if (unset) { | |
1278 | opts->use_clockid = 0; | |
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | /* no arg passed */ | |
1283 | if (!str) | |
1284 | return 0; | |
1285 | ||
1286 | /* no setting it twice */ | |
1287 | if (opts->use_clockid) | |
1288 | return -1; | |
1289 | ||
1290 | opts->use_clockid = true; | |
1291 | ||
1292 | /* if its a number, we're done */ | |
1293 | if (sscanf(str, "%d", &opts->clockid) == 1) | |
1294 | return 0; | |
1295 | ||
1296 | /* allow a "CLOCK_" prefix to the name */ | |
1297 | if (!strncasecmp(str, "CLOCK_", 6)) | |
1298 | str += 6; | |
1299 | ||
1300 | for (cm = clockids; cm->name; cm++) { | |
1301 | if (!strcasecmp(str, cm->name)) { | |
1302 | opts->clockid = cm->clockid; | |
1303 | return 0; | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | opts->use_clockid = false; | |
1308 | ui__warning("unknown clockid %s, check man page\n", ostr); | |
1309 | return -1; | |
1310 | } | |
1311 | ||
e9db1310 AH |
1312 | static int record__parse_mmap_pages(const struct option *opt, |
1313 | const char *str, | |
1314 | int unset __maybe_unused) | |
1315 | { | |
1316 | struct record_opts *opts = opt->value; | |
1317 | char *s, *p; | |
1318 | unsigned int mmap_pages; | |
1319 | int ret; | |
1320 | ||
1321 | if (!str) | |
1322 | return -EINVAL; | |
1323 | ||
1324 | s = strdup(str); | |
1325 | if (!s) | |
1326 | return -ENOMEM; | |
1327 | ||
1328 | p = strchr(s, ','); | |
1329 | if (p) | |
1330 | *p = '\0'; | |
1331 | ||
1332 | if (*s) { | |
1333 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s); | |
1334 | if (ret) | |
1335 | goto out_free; | |
1336 | opts->mmap_pages = mmap_pages; | |
1337 | } | |
1338 | ||
1339 | if (!p) { | |
1340 | ret = 0; | |
1341 | goto out_free; | |
1342 | } | |
1343 | ||
1344 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1); | |
1345 | if (ret) | |
1346 | goto out_free; | |
1347 | ||
1348 | opts->auxtrace_mmap_pages = mmap_pages; | |
1349 | ||
1350 | out_free: | |
1351 | free(s); | |
1352 | return ret; | |
1353 | } | |
1354 | ||
e5b2c207 | 1355 | static const char * const __record_usage[] = { |
9e096753 MG |
1356 | "perf record [<options>] [<command>]", |
1357 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
1358 | NULL |
1359 | }; | |
e5b2c207 | 1360 | const char * const *record_usage = __record_usage; |
0e9b20b8 | 1361 | |
d20deb64 | 1362 | /* |
8c6f45a7 ACM |
1363 | * XXX Ideally would be local to cmd_record() and passed to a record__new |
1364 | * because we need to have access to it in record__exit, that is called | |
d20deb64 ACM |
1365 | * after cmd_record() exits, but since record_options need to be accessible to |
1366 | * builtin-script, leave it here. | |
1367 | * | |
1368 | * At least we don't ouch it in all the other functions here directly. | |
1369 | * | |
1370 | * Just say no to tons of global variables, sigh. | |
1371 | */ | |
8c6f45a7 | 1372 | static struct record record = { |
d20deb64 | 1373 | .opts = { |
8affc2b8 | 1374 | .sample_time = true, |
d20deb64 ACM |
1375 | .mmap_pages = UINT_MAX, |
1376 | .user_freq = UINT_MAX, | |
1377 | .user_interval = ULLONG_MAX, | |
447a6013 | 1378 | .freq = 4000, |
d1cb9fce NK |
1379 | .target = { |
1380 | .uses_mmap = true, | |
3aa5939d | 1381 | .default_per_cpu = true, |
d1cb9fce | 1382 | }, |
9d9cad76 | 1383 | .proc_map_timeout = 500, |
d20deb64 | 1384 | }, |
e3d59112 NK |
1385 | .tool = { |
1386 | .sample = process_sample_event, | |
1387 | .fork = perf_event__process_fork, | |
cca8482c | 1388 | .exit = perf_event__process_exit, |
e3d59112 NK |
1389 | .comm = perf_event__process_comm, |
1390 | .mmap = perf_event__process_mmap, | |
1391 | .mmap2 = perf_event__process_mmap2, | |
cca8482c | 1392 | .ordered_events = true, |
e3d59112 | 1393 | }, |
d20deb64 | 1394 | }; |
7865e817 | 1395 | |
76a26549 NK |
1396 | const char record_callchain_help[] = CALLCHAIN_RECORD_HELP |
1397 | "\n\t\t\t\tDefault: fp"; | |
61eaa3be | 1398 | |
0aab2136 WN |
1399 | static bool dry_run; |
1400 | ||
d20deb64 ACM |
1401 | /* |
1402 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
1403 | * with it and switch to use the library functions in perf_evlist that came | |
b4006796 | 1404 | * from builtin-record.c, i.e. use record_opts, |
d20deb64 ACM |
1405 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', |
1406 | * using pipes, etc. | |
1407 | */ | |
e5b2c207 | 1408 | struct option __record_options[] = { |
d20deb64 | 1409 | OPT_CALLBACK('e', "event", &record.evlist, "event", |
86847b62 | 1410 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 1411 | parse_events_option), |
d20deb64 | 1412 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
c171b552 | 1413 | "event filter", parse_filter), |
4ba1faa1 WN |
1414 | OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist, |
1415 | NULL, "don't record events from perf itself", | |
1416 | exclude_perf), | |
bea03405 | 1417 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", |
d6d901c2 | 1418 | "record events on existing process id"), |
bea03405 | 1419 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", |
d6d901c2 | 1420 | "record events on existing thread id"), |
d20deb64 | 1421 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
0e9b20b8 | 1422 | "collect data with this RT SCHED_FIFO priority"), |
509051ea | 1423 | OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering, |
acac03fa | 1424 | "collect data without buffering"), |
d20deb64 | 1425 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
daac07b2 | 1426 | "collect raw sample records from all opened counters"), |
bea03405 | 1427 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, |
0e9b20b8 | 1428 | "system-wide collection from all CPUs"), |
bea03405 | 1429 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", |
c45c6ea2 | 1430 | "list of cpus to monitor"), |
d20deb64 | 1431 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
f5fc1412 | 1432 | OPT_STRING('o', "output", &record.file.path, "file", |
abaff32a | 1433 | "output file name"), |
69e7e5b0 AH |
1434 | OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit, |
1435 | &record.opts.no_inherit_set, | |
1436 | "child tasks do not inherit counters"), | |
4ea648ae WN |
1437 | OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize, |
1438 | "synthesize non-sample events at the end of output"), | |
626a6b78 | 1439 | OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"), |
d20deb64 | 1440 | OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"), |
e9db1310 AH |
1441 | OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]", |
1442 | "number of mmap data pages and AUX area tracing mmap pages", | |
1443 | record__parse_mmap_pages), | |
d20deb64 | 1444 | OPT_BOOLEAN(0, "group", &record.opts.group, |
43bece79 | 1445 | "put the counters into a counter group"), |
2ddd5c04 | 1446 | OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, |
09b0fd45 JO |
1447 | NULL, "enables call-graph recording" , |
1448 | &record_callchain_opt), | |
1449 | OPT_CALLBACK(0, "call-graph", &record.opts, | |
76a26549 | 1450 | "record_mode[,record_size]", record_callchain_help, |
09b0fd45 | 1451 | &record_parse_callchain_opt), |
c0555642 | 1452 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 1453 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 1454 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
d20deb64 | 1455 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
649c48a9 | 1456 | "per thread counts"), |
56100321 | 1457 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"), |
b6f35ed7 | 1458 | OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"), |
3abebc55 AH |
1459 | OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time, |
1460 | &record.opts.sample_time_set, | |
1461 | "Record the sample timestamps"), | |
56100321 | 1462 | OPT_BOOLEAN('P', "period", &record.opts.period, "Record the sample period"), |
d20deb64 | 1463 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, |
649c48a9 | 1464 | "don't sample"), |
d2db9a98 WN |
1465 | OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache, |
1466 | &record.no_buildid_cache_set, | |
1467 | "do not update the buildid cache"), | |
1468 | OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid, | |
1469 | &record.no_buildid_set, | |
1470 | "do not collect buildids in perf.data"), | |
d20deb64 | 1471 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
023695d9 SE |
1472 | "monitor event in cgroup name only", |
1473 | parse_cgroups), | |
a6205a35 | 1474 | OPT_UINTEGER('D', "delay", &record.opts.initial_delay, |
6619a53e | 1475 | "ms to wait before starting measurement after program start"), |
bea03405 NK |
1476 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", |
1477 | "user to profile"), | |
a5aabdac SE |
1478 | |
1479 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, | |
1480 | "branch any", "sample any taken branches", | |
1481 | parse_branch_stack), | |
1482 | ||
1483 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, | |
1484 | "branch filter mask", "branch stack filter modes", | |
bdfebd84 | 1485 | parse_branch_stack), |
05484298 AK |
1486 | OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, |
1487 | "sample by weight (on special events only)"), | |
475eeab9 AK |
1488 | OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction, |
1489 | "sample transaction flags (special events only)"), | |
3aa5939d AH |
1490 | OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, |
1491 | "use per-thread mmaps"), | |
bcc84ec6 SE |
1492 | OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register", |
1493 | "sample selected machine registers on interrupt," | |
1494 | " use -I ? to list register names", parse_regs), | |
85c273d2 AK |
1495 | OPT_BOOLEAN(0, "running-time", &record.opts.running_time, |
1496 | "Record running/enabled time of read (:S) events"), | |
814c8c38 PZ |
1497 | OPT_CALLBACK('k', "clockid", &record.opts, |
1498 | "clockid", "clockid to use for events, see clock_gettime()", | |
1499 | parse_clockid), | |
2dd6d8a1 AH |
1500 | OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts, |
1501 | "opts", "AUX area tracing Snapshot Mode", ""), | |
9d9cad76 KL |
1502 | OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout, |
1503 | "per thread proc mmap processing timeout in ms"), | |
b757bb09 AH |
1504 | OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events, |
1505 | "Record context switch events"), | |
85723885 JO |
1506 | OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel, |
1507 | "Configure all used events to run in kernel space.", | |
1508 | PARSE_OPT_EXCLUSIVE), | |
1509 | OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user, | |
1510 | "Configure all used events to run in user space.", | |
1511 | PARSE_OPT_EXCLUSIVE), | |
71dc2326 WN |
1512 | OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path", |
1513 | "clang binary to use for compiling BPF scriptlets"), | |
1514 | OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options", | |
1515 | "options passed to clang when compiling BPF scriptlets"), | |
7efe0e03 HK |
1516 | OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name, |
1517 | "file", "vmlinux pathname"), | |
6156681b NK |
1518 | OPT_BOOLEAN(0, "buildid-all", &record.buildid_all, |
1519 | "Record build-id of all DSOs regardless of hits"), | |
ecfd7a9c WN |
1520 | OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, |
1521 | "append timestamp to output filename"), | |
3c1cb7e3 WN |
1522 | OPT_BOOLEAN(0, "switch-output", &record.switch_output, |
1523 | "Switch output when receive SIGUSR2"), | |
0aab2136 WN |
1524 | OPT_BOOLEAN(0, "dry-run", &dry_run, |
1525 | "Parse options then exit"), | |
0e9b20b8 IM |
1526 | OPT_END() |
1527 | }; | |
1528 | ||
e5b2c207 NK |
1529 | struct option *record_options = __record_options; |
1530 | ||
1d037ca1 | 1531 | int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused) |
0e9b20b8 | 1532 | { |
ef149c25 | 1533 | int err; |
8c6f45a7 | 1534 | struct record *rec = &record; |
16ad2ffb | 1535 | char errbuf[BUFSIZ]; |
0e9b20b8 | 1536 | |
48e1cab1 WN |
1537 | #ifndef HAVE_LIBBPF_SUPPORT |
1538 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c) | |
1539 | set_nobuild('\0', "clang-path", true); | |
1540 | set_nobuild('\0', "clang-opt", true); | |
1541 | # undef set_nobuild | |
7efe0e03 HK |
1542 | #endif |
1543 | ||
1544 | #ifndef HAVE_BPF_PROLOGUE | |
1545 | # if !defined (HAVE_DWARF_SUPPORT) | |
1546 | # define REASON "NO_DWARF=1" | |
1547 | # elif !defined (HAVE_LIBBPF_SUPPORT) | |
1548 | # define REASON "NO_LIBBPF=1" | |
1549 | # else | |
1550 | # define REASON "this architecture doesn't support BPF prologue" | |
1551 | # endif | |
1552 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c) | |
1553 | set_nobuild('\0', "vmlinux", true); | |
1554 | # undef set_nobuild | |
1555 | # undef REASON | |
48e1cab1 WN |
1556 | #endif |
1557 | ||
3e2be2da ACM |
1558 | rec->evlist = perf_evlist__new(); |
1559 | if (rec->evlist == NULL) | |
361c99a6 ACM |
1560 | return -ENOMEM; |
1561 | ||
eb853e80 JO |
1562 | perf_config(perf_record_config, rec); |
1563 | ||
bca647aa | 1564 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 1565 | PARSE_OPT_STOP_AT_NON_OPTION); |
602ad878 | 1566 | if (!argc && target__none(&rec->opts.target)) |
bca647aa | 1567 | usage_with_options(record_usage, record_options); |
0e9b20b8 | 1568 | |
bea03405 | 1569 | if (nr_cgroups && !rec->opts.target.system_wide) { |
c7118369 NK |
1570 | usage_with_options_msg(record_usage, record_options, |
1571 | "cgroup monitoring only available in system-wide mode"); | |
1572 | ||
023695d9 | 1573 | } |
b757bb09 AH |
1574 | if (rec->opts.record_switch_events && |
1575 | !perf_can_record_switch_events()) { | |
c7118369 NK |
1576 | ui__error("kernel does not support recording context switch events\n"); |
1577 | parse_options_usage(record_usage, record_options, "switch-events", 0); | |
1578 | return -EINVAL; | |
b757bb09 | 1579 | } |
023695d9 | 1580 | |
eca857ab WN |
1581 | if (rec->switch_output) |
1582 | rec->timestamp_filename = true; | |
1583 | ||
ef149c25 AH |
1584 | if (!rec->itr) { |
1585 | rec->itr = auxtrace_record__init(rec->evlist, &err); | |
1586 | if (err) | |
5c01ad60 | 1587 | goto out; |
ef149c25 AH |
1588 | } |
1589 | ||
2dd6d8a1 AH |
1590 | err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts, |
1591 | rec->opts.auxtrace_snapshot_opts); | |
1592 | if (err) | |
5c01ad60 | 1593 | goto out; |
2dd6d8a1 | 1594 | |
1b36c03e AH |
1595 | /* |
1596 | * Allow aliases to facilitate the lookup of symbols for address | |
1597 | * filters. Refer to auxtrace_parse_filters(). | |
1598 | */ | |
1599 | symbol_conf.allow_aliases = true; | |
1600 | ||
1601 | symbol__init(NULL); | |
1602 | ||
1603 | err = auxtrace_parse_filters(rec->evlist); | |
1604 | if (err) | |
1605 | goto out; | |
1606 | ||
0aab2136 | 1607 | if (dry_run) |
5c01ad60 | 1608 | goto out; |
0aab2136 | 1609 | |
d7888573 WN |
1610 | err = bpf__setup_stdout(rec->evlist); |
1611 | if (err) { | |
1612 | bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf)); | |
1613 | pr_err("ERROR: Setup BPF stdout failed: %s\n", | |
1614 | errbuf); | |
5c01ad60 | 1615 | goto out; |
d7888573 WN |
1616 | } |
1617 | ||
ef149c25 AH |
1618 | err = -ENOMEM; |
1619 | ||
ec80fde7 | 1620 | if (symbol_conf.kptr_restrict) |
646aaea6 ACM |
1621 | pr_warning( |
1622 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
1623 | "check /proc/sys/kernel/kptr_restrict.\n\n" | |
1624 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
1625 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
1626 | "Samples in kernel modules won't be resolved at all.\n\n" | |
1627 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
1628 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
ec80fde7 | 1629 | |
0c1d46a8 | 1630 | if (rec->no_buildid_cache || rec->no_buildid) { |
a1ac1d3c | 1631 | disable_buildid_cache(); |
0c1d46a8 WN |
1632 | } else if (rec->switch_output) { |
1633 | /* | |
1634 | * In 'perf record --switch-output', disable buildid | |
1635 | * generation by default to reduce data file switching | |
1636 | * overhead. Still generate buildid if they are required | |
1637 | * explicitly using | |
1638 | * | |
1639 | * perf record --signal-trigger --no-no-buildid \ | |
1640 | * --no-no-buildid-cache | |
1641 | * | |
1642 | * Following code equals to: | |
1643 | * | |
1644 | * if ((rec->no_buildid || !rec->no_buildid_set) && | |
1645 | * (rec->no_buildid_cache || !rec->no_buildid_cache_set)) | |
1646 | * disable_buildid_cache(); | |
1647 | */ | |
1648 | bool disable = true; | |
1649 | ||
1650 | if (rec->no_buildid_set && !rec->no_buildid) | |
1651 | disable = false; | |
1652 | if (rec->no_buildid_cache_set && !rec->no_buildid_cache) | |
1653 | disable = false; | |
1654 | if (disable) { | |
1655 | rec->no_buildid = true; | |
1656 | rec->no_buildid_cache = true; | |
1657 | disable_buildid_cache(); | |
1658 | } | |
1659 | } | |
655000e7 | 1660 | |
4ea648ae WN |
1661 | if (record.opts.overwrite) |
1662 | record.opts.tail_synthesize = true; | |
1663 | ||
3e2be2da ACM |
1664 | if (rec->evlist->nr_entries == 0 && |
1665 | perf_evlist__add_default(rec->evlist) < 0) { | |
69aad6f1 | 1666 | pr_err("Not enough memory for event selector list\n"); |
394c01ed | 1667 | goto out; |
bbd36e5e | 1668 | } |
0e9b20b8 | 1669 | |
69e7e5b0 AH |
1670 | if (rec->opts.target.tid && !rec->opts.no_inherit_set) |
1671 | rec->opts.no_inherit = true; | |
1672 | ||
602ad878 | 1673 | err = target__validate(&rec->opts.target); |
16ad2ffb | 1674 | if (err) { |
602ad878 | 1675 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
16ad2ffb NK |
1676 | ui__warning("%s", errbuf); |
1677 | } | |
1678 | ||
602ad878 | 1679 | err = target__parse_uid(&rec->opts.target); |
16ad2ffb NK |
1680 | if (err) { |
1681 | int saved_errno = errno; | |
4bd0f2d2 | 1682 | |
602ad878 | 1683 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
3780f488 | 1684 | ui__error("%s", errbuf); |
16ad2ffb NK |
1685 | |
1686 | err = -saved_errno; | |
394c01ed | 1687 | goto out; |
16ad2ffb | 1688 | } |
0d37aa34 | 1689 | |
23dc4f15 JO |
1690 | /* Enable ignoring missing threads when -u option is defined. */ |
1691 | rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX; | |
1692 | ||
16ad2ffb | 1693 | err = -ENOMEM; |
3e2be2da | 1694 | if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0) |
dd7927f4 | 1695 | usage_with_options(record_usage, record_options); |
69aad6f1 | 1696 | |
ef149c25 AH |
1697 | err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts); |
1698 | if (err) | |
394c01ed | 1699 | goto out; |
ef149c25 | 1700 | |
6156681b NK |
1701 | /* |
1702 | * We take all buildids when the file contains | |
1703 | * AUX area tracing data because we do not decode the | |
1704 | * trace because it would take too long. | |
1705 | */ | |
1706 | if (rec->opts.full_auxtrace) | |
1707 | rec->buildid_all = true; | |
1708 | ||
b4006796 | 1709 | if (record_opts__config(&rec->opts)) { |
39d17dac | 1710 | err = -EINVAL; |
394c01ed | 1711 | goto out; |
7e4ff9e3 MG |
1712 | } |
1713 | ||
d20deb64 | 1714 | err = __cmd_record(&record, argc, argv); |
394c01ed | 1715 | out: |
45604710 | 1716 | perf_evlist__delete(rec->evlist); |
d65a458b | 1717 | symbol__exit(); |
ef149c25 | 1718 | auxtrace_record__free(rec->itr); |
39d17dac | 1719 | return err; |
0e9b20b8 | 1720 | } |
2dd6d8a1 AH |
1721 | |
1722 | static void snapshot_sig_handler(int sig __maybe_unused) | |
1723 | { | |
5f9cf599 WN |
1724 | if (trigger_is_ready(&auxtrace_snapshot_trigger)) { |
1725 | trigger_hit(&auxtrace_snapshot_trigger); | |
1726 | auxtrace_record__snapshot_started = 1; | |
1727 | if (auxtrace_record__snapshot_start(record.itr)) | |
1728 | trigger_error(&auxtrace_snapshot_trigger); | |
1729 | } | |
3c1cb7e3 WN |
1730 | |
1731 | if (trigger_is_ready(&switch_output_trigger)) | |
1732 | trigger_hit(&switch_output_trigger); | |
2dd6d8a1 | 1733 | } |