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" |
94c744b6 | 25 | #include "util/session.h" |
45694aa7 | 26 | #include "util/tool.h" |
8d06367f | 27 | #include "util/symbol.h" |
a12b51c4 | 28 | #include "util/cpumap.h" |
fd78260b | 29 | #include "util/thread_map.h" |
f5fc1412 | 30 | #include "util/data.h" |
bcc84ec6 | 31 | #include "util/perf_regs.h" |
ef149c25 | 32 | #include "util/auxtrace.h" |
46bc29b9 | 33 | #include "util/tsc.h" |
f00898f4 | 34 | #include "util/parse-branch-options.h" |
bcc84ec6 | 35 | #include "util/parse-regs-options.h" |
71dc2326 | 36 | #include "util/llvm-utils.h" |
8690a2a7 | 37 | #include "util/bpf-loader.h" |
5f9cf599 | 38 | #include "util/trigger.h" |
d8871ea7 | 39 | #include "asm/bug.h" |
7c6a1c65 | 40 | |
97124d5e | 41 | #include <unistd.h> |
de9ac07b | 42 | #include <sched.h> |
a41794cd | 43 | #include <sys/mman.h> |
2d11c650 | 44 | #include <asm/bug.h> |
de9ac07b | 45 | |
78da39fa | 46 | |
8c6f45a7 | 47 | struct record { |
45694aa7 | 48 | struct perf_tool tool; |
b4006796 | 49 | struct record_opts opts; |
d20deb64 | 50 | u64 bytes_written; |
f5fc1412 | 51 | struct perf_data_file file; |
ef149c25 | 52 | struct auxtrace_record *itr; |
d20deb64 ACM |
53 | struct perf_evlist *evlist; |
54 | struct perf_session *session; | |
55 | const char *progname; | |
d20deb64 | 56 | int realtime_prio; |
d20deb64 | 57 | bool no_buildid; |
d2db9a98 | 58 | bool no_buildid_set; |
d20deb64 | 59 | bool no_buildid_cache; |
d2db9a98 | 60 | bool no_buildid_cache_set; |
6156681b | 61 | bool buildid_all; |
ecfd7a9c | 62 | bool timestamp_filename; |
3c1cb7e3 | 63 | bool switch_output; |
9f065194 | 64 | unsigned long long samples; |
0f82ebc4 | 65 | }; |
a21ca2ca | 66 | |
8c6f45a7 | 67 | static int record__write(struct record *rec, void *bf, size_t size) |
f5970550 | 68 | { |
cf8b2e69 | 69 | if (perf_data_file__write(rec->session->file, bf, size) < 0) { |
50a9b868 JO |
70 | pr_err("failed to write perf data, error: %m\n"); |
71 | return -1; | |
f5970550 | 72 | } |
8d3eca20 | 73 | |
cf8b2e69 | 74 | rec->bytes_written += size; |
8d3eca20 | 75 | return 0; |
f5970550 PZ |
76 | } |
77 | ||
45694aa7 | 78 | static int process_synthesized_event(struct perf_tool *tool, |
d20deb64 | 79 | union perf_event *event, |
1d037ca1 IT |
80 | struct perf_sample *sample __maybe_unused, |
81 | struct machine *machine __maybe_unused) | |
234fbbf5 | 82 | { |
8c6f45a7 ACM |
83 | struct record *rec = container_of(tool, struct record, tool); |
84 | return record__write(rec, event, event->header.size); | |
234fbbf5 ACM |
85 | } |
86 | ||
3a62a7b8 WN |
87 | static int |
88 | backward_rb_find_range(void *buf, int mask, u64 head, u64 *start, u64 *end) | |
89 | { | |
90 | struct perf_event_header *pheader; | |
91 | u64 evt_head = head; | |
92 | int size = mask + 1; | |
93 | ||
94 | pr_debug2("backward_rb_find_range: buf=%p, head=%"PRIx64"\n", buf, head); | |
95 | pheader = (struct perf_event_header *)(buf + (head & mask)); | |
96 | *start = head; | |
97 | while (true) { | |
98 | if (evt_head - head >= (unsigned int)size) { | |
99 | pr_debug("Finshed reading backward ring buffer: rewind\n"); | |
100 | if (evt_head - head > (unsigned int)size) | |
101 | evt_head -= pheader->size; | |
102 | *end = evt_head; | |
103 | return 0; | |
104 | } | |
105 | ||
106 | pheader = (struct perf_event_header *)(buf + (evt_head & mask)); | |
107 | ||
108 | if (pheader->size == 0) { | |
109 | pr_debug("Finshed reading backward ring buffer: get start\n"); | |
110 | *end = evt_head; | |
111 | return 0; | |
112 | } | |
113 | ||
114 | evt_head += pheader->size; | |
115 | pr_debug3("move evt_head: %"PRIx64"\n", evt_head); | |
116 | } | |
117 | WARN_ONCE(1, "Shouldn't get here\n"); | |
118 | return -1; | |
119 | } | |
120 | ||
121 | static int | |
a4ea0ec4 WN |
122 | rb_find_range(void *data, int mask, u64 head, u64 old, |
123 | u64 *start, u64 *end, bool backward) | |
3a62a7b8 | 124 | { |
a4ea0ec4 | 125 | if (!backward) { |
3a62a7b8 WN |
126 | *start = old; |
127 | *end = head; | |
128 | return 0; | |
129 | } | |
130 | ||
131 | return backward_rb_find_range(data, mask, head, start, end); | |
132 | } | |
133 | ||
a4ea0ec4 WN |
134 | static int |
135 | record__mmap_read(struct record *rec, struct perf_mmap *md, | |
136 | bool overwrite, bool backward) | |
de9ac07b | 137 | { |
7b8283b5 DA |
138 | u64 head = perf_mmap__read_head(md); |
139 | u64 old = md->prev; | |
09fa4f40 | 140 | u64 end = head, start = old; |
918512b4 | 141 | unsigned char *data = md->base + page_size; |
de9ac07b PZ |
142 | unsigned long size; |
143 | void *buf; | |
8d3eca20 | 144 | int rc = 0; |
de9ac07b | 145 | |
a4ea0ec4 WN |
146 | if (rb_find_range(data, md->mask, head, |
147 | old, &start, &end, backward)) | |
3a62a7b8 WN |
148 | return -1; |
149 | ||
09fa4f40 | 150 | if (start == end) |
8d3eca20 | 151 | return 0; |
dc82009a | 152 | |
d20deb64 | 153 | rec->samples++; |
de9ac07b | 154 | |
09fa4f40 | 155 | size = end - start; |
2d11c650 WN |
156 | if (size > (unsigned long)(md->mask) + 1) { |
157 | WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n"); | |
158 | ||
159 | md->prev = head; | |
a4ea0ec4 | 160 | perf_mmap__consume(md, overwrite || backward); |
2d11c650 WN |
161 | return 0; |
162 | } | |
de9ac07b | 163 | |
09fa4f40 WN |
164 | if ((start & md->mask) + size != (end & md->mask)) { |
165 | buf = &data[start & md->mask]; | |
166 | size = md->mask + 1 - (start & md->mask); | |
167 | start += size; | |
021e9f47 | 168 | |
8c6f45a7 | 169 | if (record__write(rec, buf, size) < 0) { |
8d3eca20 DA |
170 | rc = -1; |
171 | goto out; | |
172 | } | |
de9ac07b PZ |
173 | } |
174 | ||
09fa4f40 WN |
175 | buf = &data[start & md->mask]; |
176 | size = end - start; | |
177 | start += size; | |
021e9f47 | 178 | |
8c6f45a7 | 179 | if (record__write(rec, buf, size) < 0) { |
8d3eca20 DA |
180 | rc = -1; |
181 | goto out; | |
182 | } | |
de9ac07b | 183 | |
09fa4f40 | 184 | md->prev = head; |
a4ea0ec4 | 185 | perf_mmap__consume(md, overwrite || backward); |
8d3eca20 DA |
186 | out: |
187 | return rc; | |
de9ac07b PZ |
188 | } |
189 | ||
2dd6d8a1 AH |
190 | static volatile int done; |
191 | static volatile int signr = -1; | |
192 | static volatile int child_finished; | |
c0bdc1c4 | 193 | |
2dd6d8a1 | 194 | static volatile int auxtrace_record__snapshot_started; |
5f9cf599 | 195 | static DEFINE_TRIGGER(auxtrace_snapshot_trigger); |
3c1cb7e3 | 196 | static DEFINE_TRIGGER(switch_output_trigger); |
2dd6d8a1 AH |
197 | |
198 | static void sig_handler(int sig) | |
199 | { | |
200 | if (sig == SIGCHLD) | |
201 | child_finished = 1; | |
202 | else | |
203 | signr = sig; | |
204 | ||
205 | done = 1; | |
206 | } | |
207 | ||
208 | static void record__sig_exit(void) | |
209 | { | |
210 | if (signr == -1) | |
211 | return; | |
212 | ||
213 | signal(signr, SIG_DFL); | |
214 | raise(signr); | |
215 | } | |
216 | ||
e31f0d01 AH |
217 | #ifdef HAVE_AUXTRACE_SUPPORT |
218 | ||
ef149c25 AH |
219 | static int record__process_auxtrace(struct perf_tool *tool, |
220 | union perf_event *event, void *data1, | |
221 | size_t len1, void *data2, size_t len2) | |
222 | { | |
223 | struct record *rec = container_of(tool, struct record, tool); | |
99fa2984 | 224 | struct perf_data_file *file = &rec->file; |
ef149c25 AH |
225 | size_t padding; |
226 | u8 pad[8] = {0}; | |
227 | ||
99fa2984 AH |
228 | if (!perf_data_file__is_pipe(file)) { |
229 | off_t file_offset; | |
230 | int fd = perf_data_file__fd(file); | |
231 | int err; | |
232 | ||
233 | file_offset = lseek(fd, 0, SEEK_CUR); | |
234 | if (file_offset == -1) | |
235 | return -1; | |
236 | err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index, | |
237 | event, file_offset); | |
238 | if (err) | |
239 | return err; | |
240 | } | |
241 | ||
ef149c25 AH |
242 | /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */ |
243 | padding = (len1 + len2) & 7; | |
244 | if (padding) | |
245 | padding = 8 - padding; | |
246 | ||
247 | record__write(rec, event, event->header.size); | |
248 | record__write(rec, data1, len1); | |
249 | if (len2) | |
250 | record__write(rec, data2, len2); | |
251 | record__write(rec, &pad, padding); | |
252 | ||
253 | return 0; | |
254 | } | |
255 | ||
256 | static int record__auxtrace_mmap_read(struct record *rec, | |
257 | struct auxtrace_mmap *mm) | |
258 | { | |
259 | int ret; | |
260 | ||
261 | ret = auxtrace_mmap__read(mm, rec->itr, &rec->tool, | |
262 | record__process_auxtrace); | |
263 | if (ret < 0) | |
264 | return ret; | |
265 | ||
266 | if (ret) | |
267 | rec->samples++; | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
2dd6d8a1 AH |
272 | static int record__auxtrace_mmap_read_snapshot(struct record *rec, |
273 | struct auxtrace_mmap *mm) | |
274 | { | |
275 | int ret; | |
276 | ||
277 | ret = auxtrace_mmap__read_snapshot(mm, rec->itr, &rec->tool, | |
278 | record__process_auxtrace, | |
279 | rec->opts.auxtrace_snapshot_size); | |
280 | if (ret < 0) | |
281 | return ret; | |
282 | ||
283 | if (ret) | |
284 | rec->samples++; | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | static int record__auxtrace_read_snapshot_all(struct record *rec) | |
290 | { | |
291 | int i; | |
292 | int rc = 0; | |
293 | ||
294 | for (i = 0; i < rec->evlist->nr_mmaps; i++) { | |
295 | struct auxtrace_mmap *mm = | |
296 | &rec->evlist->mmap[i].auxtrace_mmap; | |
297 | ||
298 | if (!mm->base) | |
299 | continue; | |
300 | ||
301 | if (record__auxtrace_mmap_read_snapshot(rec, mm) != 0) { | |
302 | rc = -1; | |
303 | goto out; | |
304 | } | |
305 | } | |
306 | out: | |
307 | return rc; | |
308 | } | |
309 | ||
310 | static void record__read_auxtrace_snapshot(struct record *rec) | |
311 | { | |
312 | pr_debug("Recording AUX area tracing snapshot\n"); | |
313 | if (record__auxtrace_read_snapshot_all(rec) < 0) { | |
5f9cf599 | 314 | trigger_error(&auxtrace_snapshot_trigger); |
2dd6d8a1 | 315 | } else { |
5f9cf599 WN |
316 | if (auxtrace_record__snapshot_finish(rec->itr)) |
317 | trigger_error(&auxtrace_snapshot_trigger); | |
318 | else | |
319 | trigger_ready(&auxtrace_snapshot_trigger); | |
2dd6d8a1 AH |
320 | } |
321 | } | |
322 | ||
e31f0d01 AH |
323 | #else |
324 | ||
325 | static inline | |
326 | int record__auxtrace_mmap_read(struct record *rec __maybe_unused, | |
327 | struct auxtrace_mmap *mm __maybe_unused) | |
328 | { | |
329 | return 0; | |
330 | } | |
331 | ||
2dd6d8a1 AH |
332 | static inline |
333 | void record__read_auxtrace_snapshot(struct record *rec __maybe_unused) | |
de9ac07b | 334 | { |
f7b7c26e PZ |
335 | } |
336 | ||
2dd6d8a1 AH |
337 | static inline |
338 | int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused) | |
f7b7c26e | 339 | { |
2dd6d8a1 | 340 | return 0; |
de9ac07b PZ |
341 | } |
342 | ||
2dd6d8a1 AH |
343 | #endif |
344 | ||
cda57a8c WN |
345 | static int record__mmap_evlist(struct record *rec, |
346 | struct perf_evlist *evlist) | |
347 | { | |
348 | struct record_opts *opts = &rec->opts; | |
349 | char msg[512]; | |
350 | ||
351 | if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false, | |
352 | opts->auxtrace_mmap_pages, | |
353 | opts->auxtrace_snapshot_mode) < 0) { | |
354 | if (errno == EPERM) { | |
355 | pr_err("Permission error mapping pages.\n" | |
356 | "Consider increasing " | |
357 | "/proc/sys/kernel/perf_event_mlock_kb,\n" | |
358 | "or try again with a smaller value of -m/--mmap_pages.\n" | |
359 | "(current value: %u,%u)\n", | |
360 | opts->mmap_pages, opts->auxtrace_mmap_pages); | |
361 | return -errno; | |
362 | } else { | |
363 | pr_err("failed to mmap with %d (%s)\n", errno, | |
c8b5f2c9 | 364 | str_error_r(errno, msg, sizeof(msg))); |
cda57a8c WN |
365 | if (errno) |
366 | return -errno; | |
367 | else | |
368 | return -EINVAL; | |
369 | } | |
370 | } | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static int record__mmap(struct record *rec) | |
375 | { | |
376 | return record__mmap_evlist(rec, rec->evlist); | |
377 | } | |
378 | ||
8c6f45a7 | 379 | static int record__open(struct record *rec) |
dd7927f4 | 380 | { |
56e52e85 | 381 | char msg[512]; |
6a4bb04c | 382 | struct perf_evsel *pos; |
d20deb64 ACM |
383 | struct perf_evlist *evlist = rec->evlist; |
384 | struct perf_session *session = rec->session; | |
b4006796 | 385 | struct record_opts *opts = &rec->opts; |
8d3eca20 | 386 | int rc = 0; |
dd7927f4 | 387 | |
e68ae9cf | 388 | perf_evlist__config(evlist, opts, &callchain_param); |
cac21425 | 389 | |
e5cadb93 | 390 | evlist__for_each_entry(evlist, pos) { |
dd7927f4 | 391 | try_again: |
d988d5ee | 392 | if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) { |
56e52e85 | 393 | if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) { |
d6d901c2 | 394 | if (verbose) |
c0a54341 | 395 | ui__warning("%s\n", msg); |
d6d901c2 ZY |
396 | goto try_again; |
397 | } | |
ca6a4258 | 398 | |
56e52e85 ACM |
399 | rc = -errno; |
400 | perf_evsel__open_strerror(pos, &opts->target, | |
401 | errno, msg, sizeof(msg)); | |
402 | ui__error("%s\n", msg); | |
8d3eca20 | 403 | goto out; |
c171b552 LZ |
404 | } |
405 | } | |
a43d3f08 | 406 | |
23d4aad4 ACM |
407 | if (perf_evlist__apply_filters(evlist, &pos)) { |
408 | error("failed to set filter \"%s\" on event %s with %d (%s)\n", | |
409 | pos->filter, perf_evsel__name(pos), errno, | |
c8b5f2c9 | 410 | str_error_r(errno, msg, sizeof(msg))); |
8d3eca20 DA |
411 | rc = -1; |
412 | goto out; | |
0a102479 FW |
413 | } |
414 | ||
cda57a8c WN |
415 | rc = record__mmap(rec); |
416 | if (rc) | |
8d3eca20 | 417 | goto out; |
0a27d7f9 | 418 | |
563aecb2 | 419 | session->evlist = evlist; |
7b56cce2 | 420 | perf_session__set_id_hdr_size(session); |
8d3eca20 DA |
421 | out: |
422 | return rc; | |
16c8a109 PZ |
423 | } |
424 | ||
e3d59112 NK |
425 | static int process_sample_event(struct perf_tool *tool, |
426 | union perf_event *event, | |
427 | struct perf_sample *sample, | |
428 | struct perf_evsel *evsel, | |
429 | struct machine *machine) | |
430 | { | |
431 | struct record *rec = container_of(tool, struct record, tool); | |
432 | ||
433 | rec->samples++; | |
434 | ||
435 | return build_id__mark_dso_hit(tool, event, sample, evsel, machine); | |
436 | } | |
437 | ||
8c6f45a7 | 438 | static int process_buildids(struct record *rec) |
6122e4e4 | 439 | { |
f5fc1412 JO |
440 | struct perf_data_file *file = &rec->file; |
441 | struct perf_session *session = rec->session; | |
6122e4e4 | 442 | |
457ae94a | 443 | if (file->size == 0) |
9f591fd7 ACM |
444 | return 0; |
445 | ||
00dc8657 NK |
446 | /* |
447 | * During this process, it'll load kernel map and replace the | |
448 | * dso->long_name to a real pathname it found. In this case | |
449 | * we prefer the vmlinux path like | |
450 | * /lib/modules/3.16.4/build/vmlinux | |
451 | * | |
452 | * rather than build-id path (in debug directory). | |
453 | * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 | |
454 | */ | |
455 | symbol_conf.ignore_vmlinux_buildid = true; | |
456 | ||
6156681b NK |
457 | /* |
458 | * If --buildid-all is given, it marks all DSO regardless of hits, | |
459 | * so no need to process samples. | |
460 | */ | |
461 | if (rec->buildid_all) | |
462 | rec->tool.sample = NULL; | |
463 | ||
b7b61cbe | 464 | return perf_session__process_events(session); |
6122e4e4 ACM |
465 | } |
466 | ||
8115d60c | 467 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
468 | { |
469 | int err; | |
45694aa7 | 470 | struct perf_tool *tool = data; |
a1645ce1 ZY |
471 | /* |
472 | *As for guest kernel when processing subcommand record&report, | |
473 | *we arrange module mmap prior to guest kernel mmap and trigger | |
474 | *a preload dso because default guest module symbols are loaded | |
475 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
476 | *method is used to avoid symbol missing when the first addr is | |
477 | *in module instead of in guest kernel. | |
478 | */ | |
45694aa7 | 479 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 480 | machine); |
a1645ce1 ZY |
481 | if (err < 0) |
482 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 483 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 484 | |
a1645ce1 ZY |
485 | /* |
486 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
487 | * have no _text sometimes. | |
488 | */ | |
45694aa7 | 489 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
0ae617be | 490 | machine); |
a1645ce1 ZY |
491 | if (err < 0) |
492 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 493 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
494 | } |
495 | ||
98402807 FW |
496 | static struct perf_event_header finished_round_event = { |
497 | .size = sizeof(struct perf_event_header), | |
498 | .type = PERF_RECORD_FINISHED_ROUND, | |
499 | }; | |
500 | ||
a4ea0ec4 WN |
501 | static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist, |
502 | bool backward) | |
98402807 | 503 | { |
dcabb507 | 504 | u64 bytes_written = rec->bytes_written; |
0e2e63dd | 505 | int i; |
8d3eca20 | 506 | int rc = 0; |
a4ea0ec4 | 507 | struct perf_mmap *maps; |
98402807 | 508 | |
cb21686b WN |
509 | if (!evlist) |
510 | return 0; | |
ef149c25 | 511 | |
b2cb615d | 512 | maps = backward ? evlist->backward_mmap : evlist->mmap; |
a4ea0ec4 WN |
513 | if (!maps) |
514 | return 0; | |
515 | ||
54cc54de WN |
516 | if (backward && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING) |
517 | return 0; | |
518 | ||
cb21686b | 519 | for (i = 0; i < evlist->nr_mmaps; i++) { |
a4ea0ec4 | 520 | struct auxtrace_mmap *mm = &maps[i].auxtrace_mmap; |
cb21686b | 521 | |
a4ea0ec4 WN |
522 | if (maps[i].base) { |
523 | if (record__mmap_read(rec, &maps[i], | |
524 | evlist->overwrite, backward) != 0) { | |
8d3eca20 DA |
525 | rc = -1; |
526 | goto out; | |
527 | } | |
528 | } | |
ef149c25 | 529 | |
2dd6d8a1 | 530 | if (mm->base && !rec->opts.auxtrace_snapshot_mode && |
ef149c25 AH |
531 | record__auxtrace_mmap_read(rec, mm) != 0) { |
532 | rc = -1; | |
533 | goto out; | |
534 | } | |
98402807 FW |
535 | } |
536 | ||
dcabb507 JO |
537 | /* |
538 | * Mark the round finished in case we wrote | |
539 | * at least one event. | |
540 | */ | |
541 | if (bytes_written != rec->bytes_written) | |
542 | rc = record__write(rec, &finished_round_event, sizeof(finished_round_event)); | |
8d3eca20 | 543 | |
54cc54de WN |
544 | if (backward) |
545 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); | |
8d3eca20 DA |
546 | out: |
547 | return rc; | |
98402807 FW |
548 | } |
549 | ||
cb21686b WN |
550 | static int record__mmap_read_all(struct record *rec) |
551 | { | |
552 | int err; | |
553 | ||
a4ea0ec4 | 554 | err = record__mmap_read_evlist(rec, rec->evlist, false); |
cb21686b WN |
555 | if (err) |
556 | return err; | |
557 | ||
05737464 | 558 | return record__mmap_read_evlist(rec, rec->evlist, true); |
cb21686b WN |
559 | } |
560 | ||
8c6f45a7 | 561 | static void record__init_features(struct record *rec) |
57706abc | 562 | { |
57706abc DA |
563 | struct perf_session *session = rec->session; |
564 | int feat; | |
565 | ||
566 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) | |
567 | perf_header__set_feat(&session->header, feat); | |
568 | ||
569 | if (rec->no_buildid) | |
570 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); | |
571 | ||
3e2be2da | 572 | if (!have_tracepoints(&rec->evlist->entries)) |
57706abc DA |
573 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
574 | ||
575 | if (!rec->opts.branch_stack) | |
576 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); | |
ef149c25 AH |
577 | |
578 | if (!rec->opts.full_auxtrace) | |
579 | perf_header__clear_feat(&session->header, HEADER_AUXTRACE); | |
ffa517ad JO |
580 | |
581 | perf_header__clear_feat(&session->header, HEADER_STAT); | |
57706abc DA |
582 | } |
583 | ||
e1ab48ba WN |
584 | static void |
585 | record__finish_output(struct record *rec) | |
586 | { | |
587 | struct perf_data_file *file = &rec->file; | |
588 | int fd = perf_data_file__fd(file); | |
589 | ||
590 | if (file->is_pipe) | |
591 | return; | |
592 | ||
593 | rec->session->header.data_size += rec->bytes_written; | |
594 | file->size = lseek(perf_data_file__fd(file), 0, SEEK_CUR); | |
595 | ||
596 | if (!rec->no_buildid) { | |
597 | process_buildids(rec); | |
598 | ||
599 | if (rec->buildid_all) | |
600 | dsos__hit_all(rec->session); | |
601 | } | |
602 | perf_session__write_header(rec->session, rec->evlist, fd, true); | |
603 | ||
604 | return; | |
605 | } | |
606 | ||
4ea648ae | 607 | static int record__synthesize_workload(struct record *rec, bool tail) |
be7b0c9e WN |
608 | { |
609 | struct { | |
610 | struct thread_map map; | |
611 | struct thread_map_data map_data; | |
612 | } thread_map; | |
613 | ||
4ea648ae WN |
614 | if (rec->opts.tail_synthesize != tail) |
615 | return 0; | |
616 | ||
be7b0c9e WN |
617 | thread_map.map.nr = 1; |
618 | thread_map.map.map[0].pid = rec->evlist->workload.pid; | |
619 | thread_map.map.map[0].comm = NULL; | |
620 | return perf_event__synthesize_thread_map(&rec->tool, &thread_map.map, | |
621 | process_synthesized_event, | |
622 | &rec->session->machines.host, | |
623 | rec->opts.sample_address, | |
624 | rec->opts.proc_map_timeout); | |
625 | } | |
626 | ||
4ea648ae | 627 | static int record__synthesize(struct record *rec, bool tail); |
3c1cb7e3 | 628 | |
ecfd7a9c WN |
629 | static int |
630 | record__switch_output(struct record *rec, bool at_exit) | |
631 | { | |
632 | struct perf_data_file *file = &rec->file; | |
633 | int fd, err; | |
634 | ||
635 | /* Same Size: "2015122520103046"*/ | |
636 | char timestamp[] = "InvalidTimestamp"; | |
637 | ||
4ea648ae WN |
638 | record__synthesize(rec, true); |
639 | if (target__none(&rec->opts.target)) | |
640 | record__synthesize_workload(rec, true); | |
641 | ||
ecfd7a9c WN |
642 | rec->samples = 0; |
643 | record__finish_output(rec); | |
644 | err = fetch_current_timestamp(timestamp, sizeof(timestamp)); | |
645 | if (err) { | |
646 | pr_err("Failed to get current timestamp\n"); | |
647 | return -EINVAL; | |
648 | } | |
649 | ||
650 | fd = perf_data_file__switch(file, timestamp, | |
651 | rec->session->header.data_offset, | |
652 | at_exit); | |
653 | if (fd >= 0 && !at_exit) { | |
654 | rec->bytes_written = 0; | |
655 | rec->session->header.data_size = 0; | |
656 | } | |
657 | ||
658 | if (!quiet) | |
659 | fprintf(stderr, "[ perf record: Dump %s.%s ]\n", | |
660 | file->path, timestamp); | |
3c1cb7e3 WN |
661 | |
662 | /* Output tracking events */ | |
be7b0c9e | 663 | if (!at_exit) { |
4ea648ae | 664 | record__synthesize(rec, false); |
3c1cb7e3 | 665 | |
be7b0c9e WN |
666 | /* |
667 | * In 'perf record --switch-output' without -a, | |
668 | * record__synthesize() in record__switch_output() won't | |
669 | * generate tracking events because there's no thread_map | |
670 | * in evlist. Which causes newly created perf.data doesn't | |
671 | * contain map and comm information. | |
672 | * Create a fake thread_map and directly call | |
673 | * perf_event__synthesize_thread_map() for those events. | |
674 | */ | |
675 | if (target__none(&rec->opts.target)) | |
4ea648ae | 676 | record__synthesize_workload(rec, false); |
be7b0c9e | 677 | } |
ecfd7a9c WN |
678 | return fd; |
679 | } | |
680 | ||
f33cbe72 ACM |
681 | static volatile int workload_exec_errno; |
682 | ||
683 | /* | |
684 | * perf_evlist__prepare_workload will send a SIGUSR1 | |
685 | * if the fork fails, since we asked by setting its | |
686 | * want_signal to true. | |
687 | */ | |
45604710 NK |
688 | static void workload_exec_failed_signal(int signo __maybe_unused, |
689 | siginfo_t *info, | |
f33cbe72 ACM |
690 | void *ucontext __maybe_unused) |
691 | { | |
692 | workload_exec_errno = info->si_value.sival_int; | |
693 | done = 1; | |
f33cbe72 ACM |
694 | child_finished = 1; |
695 | } | |
696 | ||
2dd6d8a1 AH |
697 | static void snapshot_sig_handler(int sig); |
698 | ||
46bc29b9 AH |
699 | int __weak |
700 | perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused, | |
701 | struct perf_tool *tool __maybe_unused, | |
702 | perf_event__handler_t process __maybe_unused, | |
703 | struct machine *machine __maybe_unused) | |
704 | { | |
705 | return 0; | |
706 | } | |
707 | ||
ee667f94 WN |
708 | static const struct perf_event_mmap_page * |
709 | perf_evlist__pick_pc(struct perf_evlist *evlist) | |
710 | { | |
b2cb615d WN |
711 | if (evlist) { |
712 | if (evlist->mmap && evlist->mmap[0].base) | |
713 | return evlist->mmap[0].base; | |
714 | if (evlist->backward_mmap && evlist->backward_mmap[0].base) | |
715 | return evlist->backward_mmap[0].base; | |
716 | } | |
ee667f94 WN |
717 | return NULL; |
718 | } | |
719 | ||
c45628b0 WN |
720 | static const struct perf_event_mmap_page *record__pick_pc(struct record *rec) |
721 | { | |
ee667f94 WN |
722 | const struct perf_event_mmap_page *pc; |
723 | ||
724 | pc = perf_evlist__pick_pc(rec->evlist); | |
725 | if (pc) | |
726 | return pc; | |
c45628b0 WN |
727 | return NULL; |
728 | } | |
729 | ||
4ea648ae | 730 | static int record__synthesize(struct record *rec, bool tail) |
c45c86eb WN |
731 | { |
732 | struct perf_session *session = rec->session; | |
733 | struct machine *machine = &session->machines.host; | |
734 | struct perf_data_file *file = &rec->file; | |
735 | struct record_opts *opts = &rec->opts; | |
736 | struct perf_tool *tool = &rec->tool; | |
737 | int fd = perf_data_file__fd(file); | |
738 | int err = 0; | |
739 | ||
4ea648ae WN |
740 | if (rec->opts.tail_synthesize != tail) |
741 | return 0; | |
742 | ||
c45c86eb WN |
743 | if (file->is_pipe) { |
744 | err = perf_event__synthesize_attrs(tool, session, | |
745 | process_synthesized_event); | |
746 | if (err < 0) { | |
747 | pr_err("Couldn't synthesize attrs.\n"); | |
748 | goto out; | |
749 | } | |
750 | ||
751 | if (have_tracepoints(&rec->evlist->entries)) { | |
752 | /* | |
753 | * FIXME err <= 0 here actually means that | |
754 | * there were no tracepoints so its not really | |
755 | * an error, just that we don't need to | |
756 | * synthesize anything. We really have to | |
757 | * return this more properly and also | |
758 | * propagate errors that now are calling die() | |
759 | */ | |
760 | err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist, | |
761 | process_synthesized_event); | |
762 | if (err <= 0) { | |
763 | pr_err("Couldn't record tracing data.\n"); | |
764 | goto out; | |
765 | } | |
766 | rec->bytes_written += err; | |
767 | } | |
768 | } | |
769 | ||
c45628b0 | 770 | err = perf_event__synth_time_conv(record__pick_pc(rec), tool, |
46bc29b9 AH |
771 | process_synthesized_event, machine); |
772 | if (err) | |
773 | goto out; | |
774 | ||
c45c86eb WN |
775 | if (rec->opts.full_auxtrace) { |
776 | err = perf_event__synthesize_auxtrace_info(rec->itr, tool, | |
777 | session, process_synthesized_event); | |
778 | if (err) | |
779 | goto out; | |
780 | } | |
781 | ||
782 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, | |
783 | machine); | |
784 | WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n" | |
785 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
786 | "Check /proc/kallsyms permission or run as root.\n"); | |
787 | ||
788 | err = perf_event__synthesize_modules(tool, process_synthesized_event, | |
789 | machine); | |
790 | WARN_ONCE(err < 0, "Couldn't record kernel module information.\n" | |
791 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
792 | "Check /proc/modules permission or run as root.\n"); | |
793 | ||
794 | if (perf_guest) { | |
795 | machines__process_guests(&session->machines, | |
796 | perf_event__synthesize_guest_os, tool); | |
797 | } | |
798 | ||
799 | err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads, | |
800 | process_synthesized_event, opts->sample_address, | |
801 | opts->proc_map_timeout); | |
802 | out: | |
803 | return err; | |
804 | } | |
805 | ||
8c6f45a7 | 806 | static int __cmd_record(struct record *rec, int argc, const char **argv) |
16c8a109 | 807 | { |
57706abc | 808 | int err; |
45604710 | 809 | int status = 0; |
8b412664 | 810 | unsigned long waking = 0; |
46be604b | 811 | const bool forks = argc > 0; |
23346f21 | 812 | struct machine *machine; |
45694aa7 | 813 | struct perf_tool *tool = &rec->tool; |
b4006796 | 814 | struct record_opts *opts = &rec->opts; |
f5fc1412 | 815 | struct perf_data_file *file = &rec->file; |
d20deb64 | 816 | struct perf_session *session; |
6dcf45ef | 817 | bool disabled = false, draining = false; |
42aa276f | 818 | int fd; |
de9ac07b | 819 | |
d20deb64 | 820 | rec->progname = argv[0]; |
33e49ea7 | 821 | |
45604710 | 822 | atexit(record__sig_exit); |
f5970550 PZ |
823 | signal(SIGCHLD, sig_handler); |
824 | signal(SIGINT, sig_handler); | |
804f7ac7 | 825 | signal(SIGTERM, sig_handler); |
c0bdc1c4 | 826 | |
3c1cb7e3 | 827 | if (rec->opts.auxtrace_snapshot_mode || rec->switch_output) { |
2dd6d8a1 | 828 | signal(SIGUSR2, snapshot_sig_handler); |
3c1cb7e3 WN |
829 | if (rec->opts.auxtrace_snapshot_mode) |
830 | trigger_on(&auxtrace_snapshot_trigger); | |
831 | if (rec->switch_output) | |
832 | trigger_on(&switch_output_trigger); | |
c0bdc1c4 | 833 | } else { |
2dd6d8a1 | 834 | signal(SIGUSR2, SIG_IGN); |
c0bdc1c4 | 835 | } |
f5970550 | 836 | |
b7b61cbe | 837 | session = perf_session__new(file, false, tool); |
94c744b6 | 838 | if (session == NULL) { |
ffa91880 | 839 | pr_err("Perf session creation failed.\n"); |
a9a70bbc ACM |
840 | return -1; |
841 | } | |
842 | ||
42aa276f | 843 | fd = perf_data_file__fd(file); |
d20deb64 ACM |
844 | rec->session = session; |
845 | ||
8c6f45a7 | 846 | record__init_features(rec); |
330aa675 | 847 | |
d4db3f16 | 848 | if (forks) { |
3e2be2da | 849 | err = perf_evlist__prepare_workload(rec->evlist, &opts->target, |
f5fc1412 | 850 | argv, file->is_pipe, |
735f7e0b | 851 | workload_exec_failed_signal); |
35b9d88e ACM |
852 | if (err < 0) { |
853 | pr_err("Couldn't run the workload!\n"); | |
45604710 | 854 | status = err; |
35b9d88e | 855 | goto out_delete_session; |
856e9660 | 856 | } |
856e9660 PZ |
857 | } |
858 | ||
8c6f45a7 | 859 | if (record__open(rec) != 0) { |
8d3eca20 | 860 | err = -1; |
45604710 | 861 | goto out_child; |
8d3eca20 | 862 | } |
de9ac07b | 863 | |
8690a2a7 WN |
864 | err = bpf__apply_obj_config(); |
865 | if (err) { | |
866 | char errbuf[BUFSIZ]; | |
867 | ||
868 | bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); | |
869 | pr_err("ERROR: Apply config to BPF failed: %s\n", | |
870 | errbuf); | |
871 | goto out_child; | |
872 | } | |
873 | ||
cca8482c AH |
874 | /* |
875 | * Normally perf_session__new would do this, but it doesn't have the | |
876 | * evlist. | |
877 | */ | |
878 | if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) { | |
879 | pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n"); | |
880 | rec->tool.ordered_events = false; | |
881 | } | |
882 | ||
3e2be2da | 883 | if (!rec->evlist->nr_groups) |
a8bb559b NK |
884 | perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); |
885 | ||
f5fc1412 | 886 | if (file->is_pipe) { |
42aa276f | 887 | err = perf_header__write_pipe(fd); |
529870e3 | 888 | if (err < 0) |
45604710 | 889 | goto out_child; |
563aecb2 | 890 | } else { |
42aa276f | 891 | err = perf_session__write_header(session, rec->evlist, fd, false); |
d5eed904 | 892 | if (err < 0) |
45604710 | 893 | goto out_child; |
56b03f3c ACM |
894 | } |
895 | ||
d3665498 | 896 | if (!rec->no_buildid |
e20960c0 | 897 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
d3665498 | 898 | pr_err("Couldn't generate buildids. " |
e20960c0 | 899 | "Use --no-buildid to profile anyway.\n"); |
8d3eca20 | 900 | err = -1; |
45604710 | 901 | goto out_child; |
e20960c0 RR |
902 | } |
903 | ||
34ba5122 | 904 | machine = &session->machines.host; |
743eb868 | 905 | |
4ea648ae | 906 | err = record__synthesize(rec, false); |
c45c86eb | 907 | if (err < 0) |
45604710 | 908 | goto out_child; |
8d3eca20 | 909 | |
d20deb64 | 910 | if (rec->realtime_prio) { |
de9ac07b PZ |
911 | struct sched_param param; |
912 | ||
d20deb64 | 913 | param.sched_priority = rec->realtime_prio; |
de9ac07b | 914 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
6beba7ad | 915 | pr_err("Could not set realtime priority.\n"); |
8d3eca20 | 916 | err = -1; |
45604710 | 917 | goto out_child; |
de9ac07b PZ |
918 | } |
919 | } | |
920 | ||
774cb499 JO |
921 | /* |
922 | * When perf is starting the traced process, all the events | |
923 | * (apart from group members) have enable_on_exec=1 set, | |
924 | * so don't spoil it by prematurely enabling them. | |
925 | */ | |
6619a53e | 926 | if (!target__none(&opts->target) && !opts->initial_delay) |
3e2be2da | 927 | perf_evlist__enable(rec->evlist); |
764e16a3 | 928 | |
856e9660 PZ |
929 | /* |
930 | * Let the child rip | |
931 | */ | |
e803cf97 | 932 | if (forks) { |
e5bed564 NK |
933 | union perf_event *event; |
934 | ||
935 | event = malloc(sizeof(event->comm) + machine->id_hdr_size); | |
936 | if (event == NULL) { | |
937 | err = -ENOMEM; | |
938 | goto out_child; | |
939 | } | |
940 | ||
e803cf97 NK |
941 | /* |
942 | * Some H/W events are generated before COMM event | |
943 | * which is emitted during exec(), so perf script | |
944 | * cannot see a correct process name for those events. | |
945 | * Synthesize COMM event to prevent it. | |
946 | */ | |
e5bed564 | 947 | perf_event__synthesize_comm(tool, event, |
e803cf97 NK |
948 | rec->evlist->workload.pid, |
949 | process_synthesized_event, | |
950 | machine); | |
e5bed564 | 951 | free(event); |
e803cf97 | 952 | |
3e2be2da | 953 | perf_evlist__start_workload(rec->evlist); |
e803cf97 | 954 | } |
856e9660 | 955 | |
6619a53e AK |
956 | if (opts->initial_delay) { |
957 | usleep(opts->initial_delay * 1000); | |
958 | perf_evlist__enable(rec->evlist); | |
959 | } | |
960 | ||
5f9cf599 | 961 | trigger_ready(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 962 | trigger_ready(&switch_output_trigger); |
649c48a9 | 963 | for (;;) { |
9f065194 | 964 | unsigned long long hits = rec->samples; |
de9ac07b | 965 | |
05737464 WN |
966 | /* |
967 | * rec->evlist->bkw_mmap_state is possible to be | |
968 | * BKW_MMAP_EMPTY here: when done == true and | |
969 | * hits != rec->samples in previous round. | |
970 | * | |
971 | * perf_evlist__toggle_bkw_mmap ensure we never | |
972 | * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING. | |
973 | */ | |
974 | if (trigger_is_hit(&switch_output_trigger) || done || draining) | |
975 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING); | |
976 | ||
8c6f45a7 | 977 | if (record__mmap_read_all(rec) < 0) { |
5f9cf599 | 978 | trigger_error(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 979 | trigger_error(&switch_output_trigger); |
8d3eca20 | 980 | err = -1; |
45604710 | 981 | goto out_child; |
8d3eca20 | 982 | } |
de9ac07b | 983 | |
2dd6d8a1 AH |
984 | if (auxtrace_record__snapshot_started) { |
985 | auxtrace_record__snapshot_started = 0; | |
5f9cf599 | 986 | if (!trigger_is_error(&auxtrace_snapshot_trigger)) |
2dd6d8a1 | 987 | record__read_auxtrace_snapshot(rec); |
5f9cf599 | 988 | if (trigger_is_error(&auxtrace_snapshot_trigger)) { |
2dd6d8a1 AH |
989 | pr_err("AUX area tracing snapshot failed\n"); |
990 | err = -1; | |
991 | goto out_child; | |
992 | } | |
993 | } | |
994 | ||
3c1cb7e3 | 995 | if (trigger_is_hit(&switch_output_trigger)) { |
05737464 WN |
996 | /* |
997 | * If switch_output_trigger is hit, the data in | |
998 | * overwritable ring buffer should have been collected, | |
999 | * so bkw_mmap_state should be set to BKW_MMAP_EMPTY. | |
1000 | * | |
1001 | * If SIGUSR2 raise after or during record__mmap_read_all(), | |
1002 | * record__mmap_read_all() didn't collect data from | |
1003 | * overwritable ring buffer. Read again. | |
1004 | */ | |
1005 | if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING) | |
1006 | continue; | |
3c1cb7e3 WN |
1007 | trigger_ready(&switch_output_trigger); |
1008 | ||
05737464 WN |
1009 | /* |
1010 | * Reenable events in overwrite ring buffer after | |
1011 | * record__mmap_read_all(): we should have collected | |
1012 | * data from it. | |
1013 | */ | |
1014 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING); | |
1015 | ||
3c1cb7e3 WN |
1016 | if (!quiet) |
1017 | fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n", | |
1018 | waking); | |
1019 | waking = 0; | |
1020 | fd = record__switch_output(rec, false); | |
1021 | if (fd < 0) { | |
1022 | pr_err("Failed to switch to new file\n"); | |
1023 | trigger_error(&switch_output_trigger); | |
1024 | err = fd; | |
1025 | goto out_child; | |
1026 | } | |
1027 | } | |
1028 | ||
d20deb64 | 1029 | if (hits == rec->samples) { |
6dcf45ef | 1030 | if (done || draining) |
649c48a9 | 1031 | break; |
f66a889d | 1032 | err = perf_evlist__poll(rec->evlist, -1); |
a515114f JO |
1033 | /* |
1034 | * Propagate error, only if there's any. Ignore positive | |
1035 | * number of returned events and interrupt error. | |
1036 | */ | |
1037 | if (err > 0 || (err < 0 && errno == EINTR)) | |
45604710 | 1038 | err = 0; |
8b412664 | 1039 | waking++; |
6dcf45ef ACM |
1040 | |
1041 | if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0) | |
1042 | draining = true; | |
8b412664 PZ |
1043 | } |
1044 | ||
774cb499 JO |
1045 | /* |
1046 | * When perf is starting the traced process, at the end events | |
1047 | * die with the process and we wait for that. Thus no need to | |
1048 | * disable events in this case. | |
1049 | */ | |
602ad878 | 1050 | if (done && !disabled && !target__none(&opts->target)) { |
5f9cf599 | 1051 | trigger_off(&auxtrace_snapshot_trigger); |
3e2be2da | 1052 | perf_evlist__disable(rec->evlist); |
2711926a JO |
1053 | disabled = true; |
1054 | } | |
de9ac07b | 1055 | } |
5f9cf599 | 1056 | trigger_off(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1057 | trigger_off(&switch_output_trigger); |
de9ac07b | 1058 | |
f33cbe72 | 1059 | if (forks && workload_exec_errno) { |
35550da3 | 1060 | char msg[STRERR_BUFSIZE]; |
c8b5f2c9 | 1061 | const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); |
f33cbe72 ACM |
1062 | pr_err("Workload failed: %s\n", emsg); |
1063 | err = -1; | |
45604710 | 1064 | goto out_child; |
f33cbe72 ACM |
1065 | } |
1066 | ||
e3d59112 | 1067 | if (!quiet) |
45604710 | 1068 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
b44308f5 | 1069 | |
4ea648ae WN |
1070 | if (target__none(&rec->opts.target)) |
1071 | record__synthesize_workload(rec, true); | |
1072 | ||
45604710 NK |
1073 | out_child: |
1074 | if (forks) { | |
1075 | int exit_status; | |
addc2785 | 1076 | |
45604710 NK |
1077 | if (!child_finished) |
1078 | kill(rec->evlist->workload.pid, SIGTERM); | |
1079 | ||
1080 | wait(&exit_status); | |
1081 | ||
1082 | if (err < 0) | |
1083 | status = err; | |
1084 | else if (WIFEXITED(exit_status)) | |
1085 | status = WEXITSTATUS(exit_status); | |
1086 | else if (WIFSIGNALED(exit_status)) | |
1087 | signr = WTERMSIG(exit_status); | |
1088 | } else | |
1089 | status = err; | |
1090 | ||
4ea648ae | 1091 | record__synthesize(rec, true); |
e3d59112 NK |
1092 | /* this will be recalculated during process_buildids() */ |
1093 | rec->samples = 0; | |
1094 | ||
ecfd7a9c WN |
1095 | if (!err) { |
1096 | if (!rec->timestamp_filename) { | |
1097 | record__finish_output(rec); | |
1098 | } else { | |
1099 | fd = record__switch_output(rec, true); | |
1100 | if (fd < 0) { | |
1101 | status = fd; | |
1102 | goto out_delete_session; | |
1103 | } | |
1104 | } | |
1105 | } | |
39d17dac | 1106 | |
e3d59112 NK |
1107 | if (!err && !quiet) { |
1108 | char samples[128]; | |
ecfd7a9c WN |
1109 | const char *postfix = rec->timestamp_filename ? |
1110 | ".<timestamp>" : ""; | |
e3d59112 | 1111 | |
ef149c25 | 1112 | if (rec->samples && !rec->opts.full_auxtrace) |
e3d59112 NK |
1113 | scnprintf(samples, sizeof(samples), |
1114 | " (%" PRIu64 " samples)", rec->samples); | |
1115 | else | |
1116 | samples[0] = '\0'; | |
1117 | ||
ecfd7a9c | 1118 | fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n", |
e3d59112 | 1119 | perf_data_file__size(file) / 1024.0 / 1024.0, |
ecfd7a9c | 1120 | file->path, postfix, samples); |
e3d59112 NK |
1121 | } |
1122 | ||
39d17dac ACM |
1123 | out_delete_session: |
1124 | perf_session__delete(session); | |
45604710 | 1125 | return status; |
de9ac07b | 1126 | } |
0e9b20b8 | 1127 | |
0883e820 | 1128 | static void callchain_debug(struct callchain_param *callchain) |
09b0fd45 | 1129 | { |
aad2b21c | 1130 | static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; |
a601fdff | 1131 | |
0883e820 | 1132 | pr_debug("callchain: type %s\n", str[callchain->record_mode]); |
26d33022 | 1133 | |
0883e820 | 1134 | if (callchain->record_mode == CALLCHAIN_DWARF) |
09b0fd45 | 1135 | pr_debug("callchain: stack dump size %d\n", |
0883e820 | 1136 | callchain->dump_size); |
09b0fd45 JO |
1137 | } |
1138 | ||
0883e820 ACM |
1139 | int record_opts__parse_callchain(struct record_opts *record, |
1140 | struct callchain_param *callchain, | |
1141 | const char *arg, bool unset) | |
09b0fd45 | 1142 | { |
09b0fd45 | 1143 | int ret; |
0883e820 | 1144 | callchain->enabled = !unset; |
eb853e80 | 1145 | |
09b0fd45 JO |
1146 | /* --no-call-graph */ |
1147 | if (unset) { | |
0883e820 | 1148 | callchain->record_mode = CALLCHAIN_NONE; |
09b0fd45 JO |
1149 | pr_debug("callchain: disabled\n"); |
1150 | return 0; | |
1151 | } | |
1152 | ||
0883e820 | 1153 | ret = parse_callchain_record_opt(arg, callchain); |
5c0cf224 JO |
1154 | if (!ret) { |
1155 | /* Enable data address sampling for DWARF unwind. */ | |
0883e820 | 1156 | if (callchain->record_mode == CALLCHAIN_DWARF) |
5c0cf224 | 1157 | record->sample_address = true; |
0883e820 | 1158 | callchain_debug(callchain); |
5c0cf224 | 1159 | } |
26d33022 JO |
1160 | |
1161 | return ret; | |
1162 | } | |
1163 | ||
0883e820 ACM |
1164 | int record_parse_callchain_opt(const struct option *opt, |
1165 | const char *arg, | |
1166 | int unset) | |
1167 | { | |
1168 | return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset); | |
1169 | } | |
1170 | ||
c421e80b | 1171 | int record_callchain_opt(const struct option *opt, |
09b0fd45 JO |
1172 | const char *arg __maybe_unused, |
1173 | int unset __maybe_unused) | |
1174 | { | |
2ddd5c04 | 1175 | struct callchain_param *callchain = opt->value; |
c421e80b | 1176 | |
2ddd5c04 | 1177 | callchain->enabled = true; |
09b0fd45 | 1178 | |
2ddd5c04 ACM |
1179 | if (callchain->record_mode == CALLCHAIN_NONE) |
1180 | callchain->record_mode = CALLCHAIN_FP; | |
eb853e80 | 1181 | |
2ddd5c04 | 1182 | callchain_debug(callchain); |
09b0fd45 JO |
1183 | return 0; |
1184 | } | |
1185 | ||
eb853e80 JO |
1186 | static int perf_record_config(const char *var, const char *value, void *cb) |
1187 | { | |
7a29c087 NK |
1188 | struct record *rec = cb; |
1189 | ||
1190 | if (!strcmp(var, "record.build-id")) { | |
1191 | if (!strcmp(value, "cache")) | |
1192 | rec->no_buildid_cache = false; | |
1193 | else if (!strcmp(value, "no-cache")) | |
1194 | rec->no_buildid_cache = true; | |
1195 | else if (!strcmp(value, "skip")) | |
1196 | rec->no_buildid = true; | |
1197 | else | |
1198 | return -1; | |
1199 | return 0; | |
1200 | } | |
eb853e80 | 1201 | if (!strcmp(var, "record.call-graph")) |
5a2e5e85 | 1202 | var = "call-graph.record-mode"; /* fall-through */ |
eb853e80 JO |
1203 | |
1204 | return perf_default_config(var, value, cb); | |
1205 | } | |
1206 | ||
814c8c38 PZ |
1207 | struct clockid_map { |
1208 | const char *name; | |
1209 | int clockid; | |
1210 | }; | |
1211 | ||
1212 | #define CLOCKID_MAP(n, c) \ | |
1213 | { .name = n, .clockid = (c), } | |
1214 | ||
1215 | #define CLOCKID_END { .name = NULL, } | |
1216 | ||
1217 | ||
1218 | /* | |
1219 | * Add the missing ones, we need to build on many distros... | |
1220 | */ | |
1221 | #ifndef CLOCK_MONOTONIC_RAW | |
1222 | #define CLOCK_MONOTONIC_RAW 4 | |
1223 | #endif | |
1224 | #ifndef CLOCK_BOOTTIME | |
1225 | #define CLOCK_BOOTTIME 7 | |
1226 | #endif | |
1227 | #ifndef CLOCK_TAI | |
1228 | #define CLOCK_TAI 11 | |
1229 | #endif | |
1230 | ||
1231 | static const struct clockid_map clockids[] = { | |
1232 | /* available for all events, NMI safe */ | |
1233 | CLOCKID_MAP("monotonic", CLOCK_MONOTONIC), | |
1234 | CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW), | |
1235 | ||
1236 | /* available for some events */ | |
1237 | CLOCKID_MAP("realtime", CLOCK_REALTIME), | |
1238 | CLOCKID_MAP("boottime", CLOCK_BOOTTIME), | |
1239 | CLOCKID_MAP("tai", CLOCK_TAI), | |
1240 | ||
1241 | /* available for the lazy */ | |
1242 | CLOCKID_MAP("mono", CLOCK_MONOTONIC), | |
1243 | CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW), | |
1244 | CLOCKID_MAP("real", CLOCK_REALTIME), | |
1245 | CLOCKID_MAP("boot", CLOCK_BOOTTIME), | |
1246 | ||
1247 | CLOCKID_END, | |
1248 | }; | |
1249 | ||
1250 | static int parse_clockid(const struct option *opt, const char *str, int unset) | |
1251 | { | |
1252 | struct record_opts *opts = (struct record_opts *)opt->value; | |
1253 | const struct clockid_map *cm; | |
1254 | const char *ostr = str; | |
1255 | ||
1256 | if (unset) { | |
1257 | opts->use_clockid = 0; | |
1258 | return 0; | |
1259 | } | |
1260 | ||
1261 | /* no arg passed */ | |
1262 | if (!str) | |
1263 | return 0; | |
1264 | ||
1265 | /* no setting it twice */ | |
1266 | if (opts->use_clockid) | |
1267 | return -1; | |
1268 | ||
1269 | opts->use_clockid = true; | |
1270 | ||
1271 | /* if its a number, we're done */ | |
1272 | if (sscanf(str, "%d", &opts->clockid) == 1) | |
1273 | return 0; | |
1274 | ||
1275 | /* allow a "CLOCK_" prefix to the name */ | |
1276 | if (!strncasecmp(str, "CLOCK_", 6)) | |
1277 | str += 6; | |
1278 | ||
1279 | for (cm = clockids; cm->name; cm++) { | |
1280 | if (!strcasecmp(str, cm->name)) { | |
1281 | opts->clockid = cm->clockid; | |
1282 | return 0; | |
1283 | } | |
1284 | } | |
1285 | ||
1286 | opts->use_clockid = false; | |
1287 | ui__warning("unknown clockid %s, check man page\n", ostr); | |
1288 | return -1; | |
1289 | } | |
1290 | ||
e9db1310 AH |
1291 | static int record__parse_mmap_pages(const struct option *opt, |
1292 | const char *str, | |
1293 | int unset __maybe_unused) | |
1294 | { | |
1295 | struct record_opts *opts = opt->value; | |
1296 | char *s, *p; | |
1297 | unsigned int mmap_pages; | |
1298 | int ret; | |
1299 | ||
1300 | if (!str) | |
1301 | return -EINVAL; | |
1302 | ||
1303 | s = strdup(str); | |
1304 | if (!s) | |
1305 | return -ENOMEM; | |
1306 | ||
1307 | p = strchr(s, ','); | |
1308 | if (p) | |
1309 | *p = '\0'; | |
1310 | ||
1311 | if (*s) { | |
1312 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s); | |
1313 | if (ret) | |
1314 | goto out_free; | |
1315 | opts->mmap_pages = mmap_pages; | |
1316 | } | |
1317 | ||
1318 | if (!p) { | |
1319 | ret = 0; | |
1320 | goto out_free; | |
1321 | } | |
1322 | ||
1323 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1); | |
1324 | if (ret) | |
1325 | goto out_free; | |
1326 | ||
1327 | opts->auxtrace_mmap_pages = mmap_pages; | |
1328 | ||
1329 | out_free: | |
1330 | free(s); | |
1331 | return ret; | |
1332 | } | |
1333 | ||
e5b2c207 | 1334 | static const char * const __record_usage[] = { |
9e096753 MG |
1335 | "perf record [<options>] [<command>]", |
1336 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
1337 | NULL |
1338 | }; | |
e5b2c207 | 1339 | const char * const *record_usage = __record_usage; |
0e9b20b8 | 1340 | |
d20deb64 | 1341 | /* |
8c6f45a7 ACM |
1342 | * XXX Ideally would be local to cmd_record() and passed to a record__new |
1343 | * because we need to have access to it in record__exit, that is called | |
d20deb64 ACM |
1344 | * after cmd_record() exits, but since record_options need to be accessible to |
1345 | * builtin-script, leave it here. | |
1346 | * | |
1347 | * At least we don't ouch it in all the other functions here directly. | |
1348 | * | |
1349 | * Just say no to tons of global variables, sigh. | |
1350 | */ | |
8c6f45a7 | 1351 | static struct record record = { |
d20deb64 | 1352 | .opts = { |
8affc2b8 | 1353 | .sample_time = true, |
d20deb64 ACM |
1354 | .mmap_pages = UINT_MAX, |
1355 | .user_freq = UINT_MAX, | |
1356 | .user_interval = ULLONG_MAX, | |
447a6013 | 1357 | .freq = 4000, |
d1cb9fce NK |
1358 | .target = { |
1359 | .uses_mmap = true, | |
3aa5939d | 1360 | .default_per_cpu = true, |
d1cb9fce | 1361 | }, |
9d9cad76 | 1362 | .proc_map_timeout = 500, |
d20deb64 | 1363 | }, |
e3d59112 NK |
1364 | .tool = { |
1365 | .sample = process_sample_event, | |
1366 | .fork = perf_event__process_fork, | |
cca8482c | 1367 | .exit = perf_event__process_exit, |
e3d59112 NK |
1368 | .comm = perf_event__process_comm, |
1369 | .mmap = perf_event__process_mmap, | |
1370 | .mmap2 = perf_event__process_mmap2, | |
cca8482c | 1371 | .ordered_events = true, |
e3d59112 | 1372 | }, |
d20deb64 | 1373 | }; |
7865e817 | 1374 | |
76a26549 NK |
1375 | const char record_callchain_help[] = CALLCHAIN_RECORD_HELP |
1376 | "\n\t\t\t\tDefault: fp"; | |
61eaa3be | 1377 | |
0aab2136 WN |
1378 | static bool dry_run; |
1379 | ||
d20deb64 ACM |
1380 | /* |
1381 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
1382 | * with it and switch to use the library functions in perf_evlist that came | |
b4006796 | 1383 | * from builtin-record.c, i.e. use record_opts, |
d20deb64 ACM |
1384 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', |
1385 | * using pipes, etc. | |
1386 | */ | |
e5b2c207 | 1387 | struct option __record_options[] = { |
d20deb64 | 1388 | OPT_CALLBACK('e', "event", &record.evlist, "event", |
86847b62 | 1389 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 1390 | parse_events_option), |
d20deb64 | 1391 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
c171b552 | 1392 | "event filter", parse_filter), |
4ba1faa1 WN |
1393 | OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist, |
1394 | NULL, "don't record events from perf itself", | |
1395 | exclude_perf), | |
bea03405 | 1396 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", |
d6d901c2 | 1397 | "record events on existing process id"), |
bea03405 | 1398 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", |
d6d901c2 | 1399 | "record events on existing thread id"), |
d20deb64 | 1400 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
0e9b20b8 | 1401 | "collect data with this RT SCHED_FIFO priority"), |
509051ea | 1402 | OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering, |
acac03fa | 1403 | "collect data without buffering"), |
d20deb64 | 1404 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
daac07b2 | 1405 | "collect raw sample records from all opened counters"), |
bea03405 | 1406 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, |
0e9b20b8 | 1407 | "system-wide collection from all CPUs"), |
bea03405 | 1408 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", |
c45c6ea2 | 1409 | "list of cpus to monitor"), |
d20deb64 | 1410 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
f5fc1412 | 1411 | OPT_STRING('o', "output", &record.file.path, "file", |
abaff32a | 1412 | "output file name"), |
69e7e5b0 AH |
1413 | OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit, |
1414 | &record.opts.no_inherit_set, | |
1415 | "child tasks do not inherit counters"), | |
4ea648ae WN |
1416 | OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize, |
1417 | "synthesize non-sample events at the end of output"), | |
626a6b78 | 1418 | OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"), |
d20deb64 | 1419 | OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"), |
e9db1310 AH |
1420 | OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]", |
1421 | "number of mmap data pages and AUX area tracing mmap pages", | |
1422 | record__parse_mmap_pages), | |
d20deb64 | 1423 | OPT_BOOLEAN(0, "group", &record.opts.group, |
43bece79 | 1424 | "put the counters into a counter group"), |
2ddd5c04 | 1425 | OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, |
09b0fd45 JO |
1426 | NULL, "enables call-graph recording" , |
1427 | &record_callchain_opt), | |
1428 | OPT_CALLBACK(0, "call-graph", &record.opts, | |
76a26549 | 1429 | "record_mode[,record_size]", record_callchain_help, |
09b0fd45 | 1430 | &record_parse_callchain_opt), |
c0555642 | 1431 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 1432 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 1433 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
d20deb64 | 1434 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
649c48a9 | 1435 | "per thread counts"), |
56100321 | 1436 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"), |
3abebc55 AH |
1437 | OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time, |
1438 | &record.opts.sample_time_set, | |
1439 | "Record the sample timestamps"), | |
56100321 | 1440 | OPT_BOOLEAN('P', "period", &record.opts.period, "Record the sample period"), |
d20deb64 | 1441 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, |
649c48a9 | 1442 | "don't sample"), |
d2db9a98 WN |
1443 | OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache, |
1444 | &record.no_buildid_cache_set, | |
1445 | "do not update the buildid cache"), | |
1446 | OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid, | |
1447 | &record.no_buildid_set, | |
1448 | "do not collect buildids in perf.data"), | |
d20deb64 | 1449 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
023695d9 SE |
1450 | "monitor event in cgroup name only", |
1451 | parse_cgroups), | |
a6205a35 | 1452 | OPT_UINTEGER('D', "delay", &record.opts.initial_delay, |
6619a53e | 1453 | "ms to wait before starting measurement after program start"), |
bea03405 NK |
1454 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", |
1455 | "user to profile"), | |
a5aabdac SE |
1456 | |
1457 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, | |
1458 | "branch any", "sample any taken branches", | |
1459 | parse_branch_stack), | |
1460 | ||
1461 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, | |
1462 | "branch filter mask", "branch stack filter modes", | |
bdfebd84 | 1463 | parse_branch_stack), |
05484298 AK |
1464 | OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, |
1465 | "sample by weight (on special events only)"), | |
475eeab9 AK |
1466 | OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction, |
1467 | "sample transaction flags (special events only)"), | |
3aa5939d AH |
1468 | OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, |
1469 | "use per-thread mmaps"), | |
bcc84ec6 SE |
1470 | OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register", |
1471 | "sample selected machine registers on interrupt," | |
1472 | " use -I ? to list register names", parse_regs), | |
85c273d2 AK |
1473 | OPT_BOOLEAN(0, "running-time", &record.opts.running_time, |
1474 | "Record running/enabled time of read (:S) events"), | |
814c8c38 PZ |
1475 | OPT_CALLBACK('k', "clockid", &record.opts, |
1476 | "clockid", "clockid to use for events, see clock_gettime()", | |
1477 | parse_clockid), | |
2dd6d8a1 AH |
1478 | OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts, |
1479 | "opts", "AUX area tracing Snapshot Mode", ""), | |
9d9cad76 KL |
1480 | OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout, |
1481 | "per thread proc mmap processing timeout in ms"), | |
b757bb09 AH |
1482 | OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events, |
1483 | "Record context switch events"), | |
85723885 JO |
1484 | OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel, |
1485 | "Configure all used events to run in kernel space.", | |
1486 | PARSE_OPT_EXCLUSIVE), | |
1487 | OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user, | |
1488 | "Configure all used events to run in user space.", | |
1489 | PARSE_OPT_EXCLUSIVE), | |
71dc2326 WN |
1490 | OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path", |
1491 | "clang binary to use for compiling BPF scriptlets"), | |
1492 | OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options", | |
1493 | "options passed to clang when compiling BPF scriptlets"), | |
7efe0e03 HK |
1494 | OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name, |
1495 | "file", "vmlinux pathname"), | |
6156681b NK |
1496 | OPT_BOOLEAN(0, "buildid-all", &record.buildid_all, |
1497 | "Record build-id of all DSOs regardless of hits"), | |
ecfd7a9c WN |
1498 | OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, |
1499 | "append timestamp to output filename"), | |
3c1cb7e3 WN |
1500 | OPT_BOOLEAN(0, "switch-output", &record.switch_output, |
1501 | "Switch output when receive SIGUSR2"), | |
0aab2136 WN |
1502 | OPT_BOOLEAN(0, "dry-run", &dry_run, |
1503 | "Parse options then exit"), | |
0e9b20b8 IM |
1504 | OPT_END() |
1505 | }; | |
1506 | ||
e5b2c207 NK |
1507 | struct option *record_options = __record_options; |
1508 | ||
1d037ca1 | 1509 | int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused) |
0e9b20b8 | 1510 | { |
ef149c25 | 1511 | int err; |
8c6f45a7 | 1512 | struct record *rec = &record; |
16ad2ffb | 1513 | char errbuf[BUFSIZ]; |
0e9b20b8 | 1514 | |
48e1cab1 WN |
1515 | #ifndef HAVE_LIBBPF_SUPPORT |
1516 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c) | |
1517 | set_nobuild('\0', "clang-path", true); | |
1518 | set_nobuild('\0', "clang-opt", true); | |
1519 | # undef set_nobuild | |
7efe0e03 HK |
1520 | #endif |
1521 | ||
1522 | #ifndef HAVE_BPF_PROLOGUE | |
1523 | # if !defined (HAVE_DWARF_SUPPORT) | |
1524 | # define REASON "NO_DWARF=1" | |
1525 | # elif !defined (HAVE_LIBBPF_SUPPORT) | |
1526 | # define REASON "NO_LIBBPF=1" | |
1527 | # else | |
1528 | # define REASON "this architecture doesn't support BPF prologue" | |
1529 | # endif | |
1530 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c) | |
1531 | set_nobuild('\0', "vmlinux", true); | |
1532 | # undef set_nobuild | |
1533 | # undef REASON | |
48e1cab1 WN |
1534 | #endif |
1535 | ||
3e2be2da ACM |
1536 | rec->evlist = perf_evlist__new(); |
1537 | if (rec->evlist == NULL) | |
361c99a6 ACM |
1538 | return -ENOMEM; |
1539 | ||
eb853e80 JO |
1540 | perf_config(perf_record_config, rec); |
1541 | ||
bca647aa | 1542 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 1543 | PARSE_OPT_STOP_AT_NON_OPTION); |
602ad878 | 1544 | if (!argc && target__none(&rec->opts.target)) |
bca647aa | 1545 | usage_with_options(record_usage, record_options); |
0e9b20b8 | 1546 | |
bea03405 | 1547 | if (nr_cgroups && !rec->opts.target.system_wide) { |
c7118369 NK |
1548 | usage_with_options_msg(record_usage, record_options, |
1549 | "cgroup monitoring only available in system-wide mode"); | |
1550 | ||
023695d9 | 1551 | } |
b757bb09 AH |
1552 | if (rec->opts.record_switch_events && |
1553 | !perf_can_record_switch_events()) { | |
c7118369 NK |
1554 | ui__error("kernel does not support recording context switch events\n"); |
1555 | parse_options_usage(record_usage, record_options, "switch-events", 0); | |
1556 | return -EINVAL; | |
b757bb09 | 1557 | } |
023695d9 | 1558 | |
eca857ab WN |
1559 | if (rec->switch_output) |
1560 | rec->timestamp_filename = true; | |
1561 | ||
ef149c25 AH |
1562 | if (!rec->itr) { |
1563 | rec->itr = auxtrace_record__init(rec->evlist, &err); | |
1564 | if (err) | |
1565 | return err; | |
1566 | } | |
1567 | ||
2dd6d8a1 AH |
1568 | err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts, |
1569 | rec->opts.auxtrace_snapshot_opts); | |
1570 | if (err) | |
1571 | return err; | |
1572 | ||
0aab2136 WN |
1573 | if (dry_run) |
1574 | return 0; | |
1575 | ||
d7888573 WN |
1576 | err = bpf__setup_stdout(rec->evlist); |
1577 | if (err) { | |
1578 | bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf)); | |
1579 | pr_err("ERROR: Setup BPF stdout failed: %s\n", | |
1580 | errbuf); | |
1581 | return err; | |
1582 | } | |
1583 | ||
ef149c25 AH |
1584 | err = -ENOMEM; |
1585 | ||
0a7e6d1b | 1586 | symbol__init(NULL); |
baa2f6ce | 1587 | |
ec80fde7 | 1588 | if (symbol_conf.kptr_restrict) |
646aaea6 ACM |
1589 | pr_warning( |
1590 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
1591 | "check /proc/sys/kernel/kptr_restrict.\n\n" | |
1592 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
1593 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
1594 | "Samples in kernel modules won't be resolved at all.\n\n" | |
1595 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
1596 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
ec80fde7 | 1597 | |
0c1d46a8 | 1598 | if (rec->no_buildid_cache || rec->no_buildid) { |
a1ac1d3c | 1599 | disable_buildid_cache(); |
0c1d46a8 WN |
1600 | } else if (rec->switch_output) { |
1601 | /* | |
1602 | * In 'perf record --switch-output', disable buildid | |
1603 | * generation by default to reduce data file switching | |
1604 | * overhead. Still generate buildid if they are required | |
1605 | * explicitly using | |
1606 | * | |
1607 | * perf record --signal-trigger --no-no-buildid \ | |
1608 | * --no-no-buildid-cache | |
1609 | * | |
1610 | * Following code equals to: | |
1611 | * | |
1612 | * if ((rec->no_buildid || !rec->no_buildid_set) && | |
1613 | * (rec->no_buildid_cache || !rec->no_buildid_cache_set)) | |
1614 | * disable_buildid_cache(); | |
1615 | */ | |
1616 | bool disable = true; | |
1617 | ||
1618 | if (rec->no_buildid_set && !rec->no_buildid) | |
1619 | disable = false; | |
1620 | if (rec->no_buildid_cache_set && !rec->no_buildid_cache) | |
1621 | disable = false; | |
1622 | if (disable) { | |
1623 | rec->no_buildid = true; | |
1624 | rec->no_buildid_cache = true; | |
1625 | disable_buildid_cache(); | |
1626 | } | |
1627 | } | |
655000e7 | 1628 | |
4ea648ae WN |
1629 | if (record.opts.overwrite) |
1630 | record.opts.tail_synthesize = true; | |
1631 | ||
3e2be2da ACM |
1632 | if (rec->evlist->nr_entries == 0 && |
1633 | perf_evlist__add_default(rec->evlist) < 0) { | |
69aad6f1 ACM |
1634 | pr_err("Not enough memory for event selector list\n"); |
1635 | goto out_symbol_exit; | |
bbd36e5e | 1636 | } |
0e9b20b8 | 1637 | |
69e7e5b0 AH |
1638 | if (rec->opts.target.tid && !rec->opts.no_inherit_set) |
1639 | rec->opts.no_inherit = true; | |
1640 | ||
602ad878 | 1641 | err = target__validate(&rec->opts.target); |
16ad2ffb | 1642 | if (err) { |
602ad878 | 1643 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
16ad2ffb NK |
1644 | ui__warning("%s", errbuf); |
1645 | } | |
1646 | ||
602ad878 | 1647 | err = target__parse_uid(&rec->opts.target); |
16ad2ffb NK |
1648 | if (err) { |
1649 | int saved_errno = errno; | |
4bd0f2d2 | 1650 | |
602ad878 | 1651 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
3780f488 | 1652 | ui__error("%s", errbuf); |
16ad2ffb NK |
1653 | |
1654 | err = -saved_errno; | |
8fa60e1f | 1655 | goto out_symbol_exit; |
16ad2ffb | 1656 | } |
0d37aa34 | 1657 | |
16ad2ffb | 1658 | err = -ENOMEM; |
3e2be2da | 1659 | if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0) |
dd7927f4 | 1660 | usage_with_options(record_usage, record_options); |
69aad6f1 | 1661 | |
ef149c25 AH |
1662 | err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts); |
1663 | if (err) | |
1664 | goto out_symbol_exit; | |
1665 | ||
6156681b NK |
1666 | /* |
1667 | * We take all buildids when the file contains | |
1668 | * AUX area tracing data because we do not decode the | |
1669 | * trace because it would take too long. | |
1670 | */ | |
1671 | if (rec->opts.full_auxtrace) | |
1672 | rec->buildid_all = true; | |
1673 | ||
b4006796 | 1674 | if (record_opts__config(&rec->opts)) { |
39d17dac | 1675 | err = -EINVAL; |
03ad9747 | 1676 | goto out_symbol_exit; |
7e4ff9e3 MG |
1677 | } |
1678 | ||
d20deb64 | 1679 | err = __cmd_record(&record, argc, argv); |
d65a458b | 1680 | out_symbol_exit: |
45604710 | 1681 | perf_evlist__delete(rec->evlist); |
d65a458b | 1682 | symbol__exit(); |
ef149c25 | 1683 | auxtrace_record__free(rec->itr); |
39d17dac | 1684 | return err; |
0e9b20b8 | 1685 | } |
2dd6d8a1 AH |
1686 | |
1687 | static void snapshot_sig_handler(int sig __maybe_unused) | |
1688 | { | |
5f9cf599 WN |
1689 | if (trigger_is_ready(&auxtrace_snapshot_trigger)) { |
1690 | trigger_hit(&auxtrace_snapshot_trigger); | |
1691 | auxtrace_record__snapshot_started = 1; | |
1692 | if (auxtrace_record__snapshot_start(record.itr)) | |
1693 | trigger_error(&auxtrace_snapshot_trigger); | |
1694 | } | |
3c1cb7e3 WN |
1695 | |
1696 | if (trigger_is_ready(&switch_output_trigger)) | |
1697 | trigger_hit(&switch_output_trigger); | |
2dd6d8a1 | 1698 | } |