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 | */ |
b8f46c5a XG |
8 | #define _FILE_OFFSET_BITS 64 |
9 | ||
16f762a2 | 10 | #include "builtin.h" |
bf9e1876 IM |
11 | |
12 | #include "perf.h" | |
13 | ||
6122e4e4 | 14 | #include "util/build-id.h" |
6eda5838 | 15 | #include "util/util.h" |
0e9b20b8 | 16 | #include "util/parse-options.h" |
8ad8db37 | 17 | #include "util/parse-events.h" |
6eda5838 | 18 | |
7c6a1c65 | 19 | #include "util/header.h" |
66e274f3 | 20 | #include "util/event.h" |
361c99a6 | 21 | #include "util/evlist.h" |
69aad6f1 | 22 | #include "util/evsel.h" |
8f28827a | 23 | #include "util/debug.h" |
94c744b6 | 24 | #include "util/session.h" |
45694aa7 | 25 | #include "util/tool.h" |
8d06367f | 26 | #include "util/symbol.h" |
a12b51c4 | 27 | #include "util/cpumap.h" |
fd78260b | 28 | #include "util/thread_map.h" |
7c6a1c65 | 29 | |
97124d5e | 30 | #include <unistd.h> |
de9ac07b | 31 | #include <sched.h> |
a41794cd | 32 | #include <sys/mman.h> |
de9ac07b | 33 | |
7865e817 FW |
34 | enum write_mode_t { |
35 | WRITE_FORCE, | |
36 | WRITE_APPEND | |
37 | }; | |
38 | ||
d20deb64 | 39 | struct perf_record { |
45694aa7 | 40 | struct perf_tool tool; |
d20deb64 ACM |
41 | struct perf_record_opts opts; |
42 | u64 bytes_written; | |
43 | const char *output_name; | |
44 | struct perf_evlist *evlist; | |
45 | struct perf_session *session; | |
46 | const char *progname; | |
47 | int output; | |
48 | unsigned int page_size; | |
49 | int realtime_prio; | |
50 | enum write_mode_t write_mode; | |
51 | bool no_buildid; | |
52 | bool no_buildid_cache; | |
53 | bool force; | |
54 | bool file_new; | |
55 | bool append_file; | |
56 | long samples; | |
57 | off_t post_processing_offset; | |
0f82ebc4 | 58 | }; |
a21ca2ca | 59 | |
d20deb64 | 60 | static void advance_output(struct perf_record *rec, size_t size) |
9215545e | 61 | { |
d20deb64 | 62 | rec->bytes_written += size; |
9215545e TZ |
63 | } |
64 | ||
8d3eca20 | 65 | static int write_output(struct perf_record *rec, void *buf, size_t size) |
f5970550 PZ |
66 | { |
67 | while (size) { | |
d20deb64 | 68 | int ret = write(rec->output, buf, size); |
f5970550 | 69 | |
8d3eca20 DA |
70 | if (ret < 0) { |
71 | pr_err("failed to write\n"); | |
72 | return -1; | |
73 | } | |
f5970550 PZ |
74 | |
75 | size -= ret; | |
76 | buf += ret; | |
77 | ||
d20deb64 | 78 | rec->bytes_written += ret; |
f5970550 | 79 | } |
8d3eca20 DA |
80 | |
81 | return 0; | |
f5970550 PZ |
82 | } |
83 | ||
45694aa7 | 84 | static int process_synthesized_event(struct perf_tool *tool, |
d20deb64 | 85 | union perf_event *event, |
1d037ca1 IT |
86 | struct perf_sample *sample __maybe_unused, |
87 | struct machine *machine __maybe_unused) | |
234fbbf5 | 88 | { |
45694aa7 | 89 | struct perf_record *rec = container_of(tool, struct perf_record, tool); |
8d3eca20 DA |
90 | if (write_output(rec, event, event->header.size) < 0) |
91 | return -1; | |
92 | ||
234fbbf5 ACM |
93 | return 0; |
94 | } | |
95 | ||
8d3eca20 | 96 | static int perf_record__mmap_read(struct perf_record *rec, |
d20deb64 | 97 | struct perf_mmap *md) |
de9ac07b | 98 | { |
744bd8aa | 99 | unsigned int head = perf_mmap__read_head(md); |
de9ac07b | 100 | unsigned int old = md->prev; |
d20deb64 | 101 | unsigned char *data = md->base + rec->page_size; |
de9ac07b PZ |
102 | unsigned long size; |
103 | void *buf; | |
8d3eca20 | 104 | int rc = 0; |
de9ac07b | 105 | |
dc82009a | 106 | if (old == head) |
8d3eca20 | 107 | return 0; |
dc82009a | 108 | |
d20deb64 | 109 | rec->samples++; |
de9ac07b PZ |
110 | |
111 | size = head - old; | |
112 | ||
113 | if ((old & md->mask) + size != (head & md->mask)) { | |
114 | buf = &data[old & md->mask]; | |
115 | size = md->mask + 1 - (old & md->mask); | |
116 | old += size; | |
021e9f47 | 117 | |
8d3eca20 DA |
118 | if (write_output(rec, buf, size) < 0) { |
119 | rc = -1; | |
120 | goto out; | |
121 | } | |
de9ac07b PZ |
122 | } |
123 | ||
124 | buf = &data[old & md->mask]; | |
125 | size = head - old; | |
126 | old += size; | |
021e9f47 | 127 | |
8d3eca20 DA |
128 | if (write_output(rec, buf, size) < 0) { |
129 | rc = -1; | |
130 | goto out; | |
131 | } | |
de9ac07b PZ |
132 | |
133 | md->prev = old; | |
115d2d89 | 134 | perf_mmap__write_tail(md, old); |
8d3eca20 DA |
135 | |
136 | out: | |
137 | return rc; | |
de9ac07b PZ |
138 | } |
139 | ||
140 | static volatile int done = 0; | |
f7b7c26e | 141 | static volatile int signr = -1; |
33e49ea7 | 142 | static volatile int child_finished = 0; |
de9ac07b | 143 | |
16c8a109 | 144 | static void sig_handler(int sig) |
de9ac07b | 145 | { |
33e49ea7 AK |
146 | if (sig == SIGCHLD) |
147 | child_finished = 1; | |
148 | ||
16c8a109 | 149 | done = 1; |
f7b7c26e PZ |
150 | signr = sig; |
151 | } | |
152 | ||
1d037ca1 | 153 | static void perf_record__sig_exit(int exit_status __maybe_unused, void *arg) |
f7b7c26e | 154 | { |
d20deb64 | 155 | struct perf_record *rec = arg; |
33e49ea7 AK |
156 | int status; |
157 | ||
d20deb64 | 158 | if (rec->evlist->workload.pid > 0) { |
33e49ea7 | 159 | if (!child_finished) |
d20deb64 | 160 | kill(rec->evlist->workload.pid, SIGTERM); |
33e49ea7 AK |
161 | |
162 | wait(&status); | |
163 | if (WIFSIGNALED(status)) | |
d20deb64 | 164 | psignal(WTERMSIG(status), rec->progname); |
33e49ea7 | 165 | } |
933da83a | 166 | |
18483b81 | 167 | if (signr == -1 || signr == SIGUSR1) |
f7b7c26e PZ |
168 | return; |
169 | ||
170 | signal(signr, SIG_DFL); | |
171 | kill(getpid(), signr); | |
de9ac07b PZ |
172 | } |
173 | ||
a91e5431 ACM |
174 | static bool perf_evlist__equal(struct perf_evlist *evlist, |
175 | struct perf_evlist *other) | |
176 | { | |
177 | struct perf_evsel *pos, *pair; | |
178 | ||
179 | if (evlist->nr_entries != other->nr_entries) | |
180 | return false; | |
181 | ||
0c21f736 | 182 | pair = perf_evlist__first(other); |
a91e5431 ACM |
183 | |
184 | list_for_each_entry(pos, &evlist->entries, node) { | |
185 | if (memcmp(&pos->attr, &pair->attr, sizeof(pos->attr) != 0)) | |
186 | return false; | |
0c21f736 | 187 | pair = perf_evsel__next(pair); |
a91e5431 ACM |
188 | } |
189 | ||
190 | return true; | |
191 | } | |
192 | ||
8d3eca20 | 193 | static int perf_record__open(struct perf_record *rec) |
dd7927f4 | 194 | { |
6a4bb04c | 195 | struct perf_evsel *pos; |
d20deb64 ACM |
196 | struct perf_evlist *evlist = rec->evlist; |
197 | struct perf_session *session = rec->session; | |
198 | struct perf_record_opts *opts = &rec->opts; | |
8d3eca20 | 199 | int rc = 0; |
dd7927f4 | 200 | |
d20deb64 | 201 | perf_evlist__config_attrs(evlist, opts); |
0f82ebc4 | 202 | |
6a4bb04c | 203 | if (opts->group) |
63dab225 | 204 | perf_evlist__set_leader(evlist); |
6a4bb04c | 205 | |
dd7927f4 ACM |
206 | list_for_each_entry(pos, &evlist->entries, node) { |
207 | struct perf_event_attr *attr = &pos->attr; | |
208 | /* | |
209 | * Check if parse_single_tracepoint_event has already asked for | |
210 | * PERF_SAMPLE_TIME. | |
211 | * | |
212 | * XXX this is kludgy but short term fix for problems introduced by | |
213 | * eac23d1c that broke 'perf script' by having different sample_types | |
214 | * when using multiple tracepoint events when we use a perf binary | |
215 | * that tries to use sample_id_all on an older kernel. | |
216 | * | |
217 | * We need to move counter creation to perf_session, support | |
218 | * different sample_types, etc. | |
219 | */ | |
220 | bool time_needed = attr->sample_type & PERF_SAMPLE_TIME; | |
d6d901c2 | 221 | |
0c978128 ACM |
222 | fallback_missing_features: |
223 | if (opts->exclude_guest_missing) | |
224 | attr->exclude_guest = attr->exclude_host = 0; | |
dd7927f4 | 225 | retry_sample_id: |
808e1226 | 226 | attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1; |
dd7927f4 | 227 | try_again: |
6a4bb04c | 228 | if (perf_evsel__open(pos, evlist->cpus, evlist->threads) < 0) { |
d6d901c2 ZY |
229 | int err = errno; |
230 | ||
c286c419 | 231 | if (err == EPERM || err == EACCES) { |
b8631e6e | 232 | ui__error_paranoid(); |
8d3eca20 DA |
233 | rc = -err; |
234 | goto out; | |
bea03405 | 235 | } else if (err == ENODEV && opts->target.cpu_list) { |
8d3eca20 DA |
236 | pr_err("No such device - did you specify" |
237 | " an out-of-range profile CPU?\n"); | |
238 | rc = -err; | |
239 | goto out; | |
0c978128 ACM |
240 | } else if (err == EINVAL) { |
241 | if (!opts->exclude_guest_missing && | |
242 | (attr->exclude_guest || attr->exclude_host)) { | |
243 | pr_debug("Old kernel, cannot exclude " | |
244 | "guest or host samples.\n"); | |
245 | opts->exclude_guest_missing = true; | |
246 | goto fallback_missing_features; | |
808e1226 | 247 | } else if (!opts->sample_id_all_missing) { |
0c978128 ACM |
248 | /* |
249 | * Old kernel, no attr->sample_id_type_all field | |
250 | */ | |
808e1226 | 251 | opts->sample_id_all_missing = true; |
0c978128 ACM |
252 | if (!opts->sample_time && !opts->raw_samples && !time_needed) |
253 | attr->sample_type &= ~PERF_SAMPLE_TIME; | |
254 | ||
255 | goto retry_sample_id; | |
256 | } | |
d6d901c2 | 257 | } |
3da297a6 | 258 | |
d6d901c2 ZY |
259 | /* |
260 | * If it's cycles then fall back to hrtimer | |
261 | * based cpu-clock-tick sw counter, which | |
028d455b DA |
262 | * is always available even if no PMU support. |
263 | * | |
264 | * PPC returns ENXIO until 2.6.37 (behavior changed | |
265 | * with commit b0a873e). | |
d6d901c2 | 266 | */ |
028d455b DA |
267 | if ((err == ENOENT || err == ENXIO) |
268 | && attr->type == PERF_TYPE_HARDWARE | |
d6d901c2 ZY |
269 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { |
270 | ||
271 | if (verbose) | |
ca6a4258 DA |
272 | ui__warning("The cycles event is not supported, " |
273 | "trying to fall back to cpu-clock-ticks\n"); | |
d6d901c2 ZY |
274 | attr->type = PERF_TYPE_SOFTWARE; |
275 | attr->config = PERF_COUNT_SW_CPU_CLOCK; | |
d1cae34d DA |
276 | if (pos->name) { |
277 | free(pos->name); | |
278 | pos->name = NULL; | |
279 | } | |
d6d901c2 ZY |
280 | goto try_again; |
281 | } | |
ca6a4258 DA |
282 | |
283 | if (err == ENOENT) { | |
3780f488 | 284 | ui__error("The %s event is not supported.\n", |
7289f83c | 285 | perf_evsel__name(pos)); |
8d3eca20 DA |
286 | rc = -err; |
287 | goto out; | |
ca6a4258 DA |
288 | } |
289 | ||
d6d901c2 | 290 | printf("\n"); |
1863fbbb SE |
291 | error("sys_perf_event_open() syscall returned with %d " |
292 | "(%s) for event %s. /bin/dmesg may provide " | |
293 | "additional information.\n", | |
294 | err, strerror(err), perf_evsel__name(pos)); | |
bfd45118 SK |
295 | |
296 | #if defined(__i386__) || defined(__x86_64__) | |
8d3eca20 DA |
297 | if (attr->type == PERF_TYPE_HARDWARE && |
298 | err == EOPNOTSUPP) { | |
299 | pr_err("No hardware sampling interrupt available." | |
300 | " No APIC? If so then you can boot the kernel" | |
301 | " with the \"lapic\" boot parameter to" | |
302 | " force-enable it.\n"); | |
303 | rc = -err; | |
304 | goto out; | |
305 | } | |
bfd45118 SK |
306 | #endif |
307 | ||
8d3eca20 DA |
308 | pr_err("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
309 | rc = -err; | |
310 | goto out; | |
c171b552 LZ |
311 | } |
312 | } | |
a43d3f08 | 313 | |
1491a632 | 314 | if (perf_evlist__apply_filters(evlist)) { |
0a102479 FW |
315 | error("failed to set filter with %d (%s)\n", errno, |
316 | strerror(errno)); | |
8d3eca20 DA |
317 | rc = -1; |
318 | goto out; | |
0a102479 FW |
319 | } |
320 | ||
18e60939 | 321 | if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) { |
8d3eca20 DA |
322 | if (errno == EPERM) { |
323 | pr_err("Permission error mapping pages.\n" | |
324 | "Consider increasing " | |
325 | "/proc/sys/kernel/perf_event_mlock_kb,\n" | |
326 | "or try again with a smaller value of -m/--mmap_pages.\n" | |
327 | "(current value: %d)\n", opts->mmap_pages); | |
328 | rc = -errno; | |
329 | } else if (!is_power_of_2(opts->mmap_pages)) { | |
330 | pr_err("--mmap_pages/-m value must be a power of two."); | |
331 | rc = -EINVAL; | |
332 | } else { | |
333 | pr_err("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
334 | rc = -errno; | |
335 | } | |
336 | goto out; | |
18e60939 | 337 | } |
0a27d7f9 | 338 | |
d20deb64 | 339 | if (rec->file_new) |
a91e5431 ACM |
340 | session->evlist = evlist; |
341 | else { | |
342 | if (!perf_evlist__equal(session->evlist, evlist)) { | |
343 | fprintf(stderr, "incompatible append\n"); | |
8d3eca20 DA |
344 | rc = -1; |
345 | goto out; | |
a91e5431 ACM |
346 | } |
347 | } | |
348 | ||
7b56cce2 | 349 | perf_session__set_id_hdr_size(session); |
8d3eca20 DA |
350 | out: |
351 | return rc; | |
16c8a109 PZ |
352 | } |
353 | ||
d20deb64 | 354 | static int process_buildids(struct perf_record *rec) |
6122e4e4 | 355 | { |
d20deb64 | 356 | u64 size = lseek(rec->output, 0, SEEK_CUR); |
6122e4e4 | 357 | |
9f591fd7 ACM |
358 | if (size == 0) |
359 | return 0; | |
360 | ||
d20deb64 ACM |
361 | rec->session->fd = rec->output; |
362 | return __perf_session__process_events(rec->session, rec->post_processing_offset, | |
363 | size - rec->post_processing_offset, | |
6122e4e4 ACM |
364 | size, &build_id__mark_dso_hit_ops); |
365 | } | |
366 | ||
8d3eca20 | 367 | static void perf_record__exit(int status, void *arg) |
f5970550 | 368 | { |
d20deb64 ACM |
369 | struct perf_record *rec = arg; |
370 | ||
8d3eca20 DA |
371 | if (status != 0) |
372 | return; | |
373 | ||
d20deb64 ACM |
374 | if (!rec->opts.pipe_output) { |
375 | rec->session->header.data_size += rec->bytes_written; | |
376 | ||
377 | if (!rec->no_buildid) | |
378 | process_buildids(rec); | |
379 | perf_session__write_header(rec->session, rec->evlist, | |
380 | rec->output, true); | |
381 | perf_session__delete(rec->session); | |
382 | perf_evlist__delete(rec->evlist); | |
d65a458b | 383 | symbol__exit(); |
c7929e47 | 384 | } |
f5970550 PZ |
385 | } |
386 | ||
8115d60c | 387 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
388 | { |
389 | int err; | |
45694aa7 | 390 | struct perf_tool *tool = data; |
a1645ce1 | 391 | |
23346f21 | 392 | if (machine__is_host(machine)) |
a1645ce1 ZY |
393 | return; |
394 | ||
395 | /* | |
396 | *As for guest kernel when processing subcommand record&report, | |
397 | *we arrange module mmap prior to guest kernel mmap and trigger | |
398 | *a preload dso because default guest module symbols are loaded | |
399 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
400 | *method is used to avoid symbol missing when the first addr is | |
401 | *in module instead of in guest kernel. | |
402 | */ | |
45694aa7 | 403 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 404 | machine); |
a1645ce1 ZY |
405 | if (err < 0) |
406 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 407 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 408 | |
a1645ce1 ZY |
409 | /* |
410 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
411 | * have no _text sometimes. | |
412 | */ | |
45694aa7 | 413 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
743eb868 | 414 | machine, "_text"); |
a1645ce1 | 415 | if (err < 0) |
45694aa7 | 416 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
743eb868 | 417 | machine, "_stext"); |
a1645ce1 ZY |
418 | if (err < 0) |
419 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 420 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
421 | } |
422 | ||
98402807 FW |
423 | static struct perf_event_header finished_round_event = { |
424 | .size = sizeof(struct perf_event_header), | |
425 | .type = PERF_RECORD_FINISHED_ROUND, | |
426 | }; | |
427 | ||
8d3eca20 | 428 | static int perf_record__mmap_read_all(struct perf_record *rec) |
98402807 | 429 | { |
0e2e63dd | 430 | int i; |
8d3eca20 | 431 | int rc = 0; |
98402807 | 432 | |
d20deb64 | 433 | for (i = 0; i < rec->evlist->nr_mmaps; i++) { |
8d3eca20 DA |
434 | if (rec->evlist->mmap[i].base) { |
435 | if (perf_record__mmap_read(rec, &rec->evlist->mmap[i]) != 0) { | |
436 | rc = -1; | |
437 | goto out; | |
438 | } | |
439 | } | |
98402807 FW |
440 | } |
441 | ||
2eeaaa09 | 442 | if (perf_header__has_feat(&rec->session->header, HEADER_TRACING_DATA)) |
8d3eca20 DA |
443 | rc = write_output(rec, &finished_round_event, |
444 | sizeof(finished_round_event)); | |
445 | ||
446 | out: | |
447 | return rc; | |
98402807 FW |
448 | } |
449 | ||
d20deb64 | 450 | static int __cmd_record(struct perf_record *rec, int argc, const char **argv) |
16c8a109 | 451 | { |
abaff32a | 452 | struct stat st; |
abaff32a | 453 | int flags; |
781ba9d2 | 454 | int err, output, feat; |
8b412664 | 455 | unsigned long waking = 0; |
46be604b | 456 | const bool forks = argc > 0; |
23346f21 | 457 | struct machine *machine; |
45694aa7 | 458 | struct perf_tool *tool = &rec->tool; |
d20deb64 ACM |
459 | struct perf_record_opts *opts = &rec->opts; |
460 | struct perf_evlist *evsel_list = rec->evlist; | |
461 | const char *output_name = rec->output_name; | |
462 | struct perf_session *session; | |
de9ac07b | 463 | |
d20deb64 | 464 | rec->progname = argv[0]; |
33e49ea7 | 465 | |
d20deb64 | 466 | rec->page_size = sysconf(_SC_PAGE_SIZE); |
de9ac07b | 467 | |
d20deb64 | 468 | on_exit(perf_record__sig_exit, rec); |
f5970550 PZ |
469 | signal(SIGCHLD, sig_handler); |
470 | signal(SIGINT, sig_handler); | |
18483b81 | 471 | signal(SIGUSR1, sig_handler); |
f5970550 | 472 | |
d7065adb FBH |
473 | if (!output_name) { |
474 | if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode)) | |
d20deb64 | 475 | opts->pipe_output = true; |
d7065adb | 476 | else |
d20deb64 | 477 | rec->output_name = output_name = "perf.data"; |
d7065adb FBH |
478 | } |
479 | if (output_name) { | |
480 | if (!strcmp(output_name, "-")) | |
d20deb64 | 481 | opts->pipe_output = true; |
d7065adb | 482 | else if (!stat(output_name, &st) && st.st_size) { |
d20deb64 | 483 | if (rec->write_mode == WRITE_FORCE) { |
d7065adb FBH |
484 | char oldname[PATH_MAX]; |
485 | snprintf(oldname, sizeof(oldname), "%s.old", | |
486 | output_name); | |
487 | unlink(oldname); | |
488 | rename(output_name, oldname); | |
489 | } | |
d20deb64 ACM |
490 | } else if (rec->write_mode == WRITE_APPEND) { |
491 | rec->write_mode = WRITE_FORCE; | |
266e0e21 | 492 | } |
97124d5e PZ |
493 | } |
494 | ||
f887f301 | 495 | flags = O_CREAT|O_RDWR; |
d20deb64 ACM |
496 | if (rec->write_mode == WRITE_APPEND) |
497 | rec->file_new = 0; | |
abaff32a IM |
498 | else |
499 | flags |= O_TRUNC; | |
500 | ||
d20deb64 | 501 | if (opts->pipe_output) |
529870e3 TZ |
502 | output = STDOUT_FILENO; |
503 | else | |
504 | output = open(output_name, flags, S_IRUSR | S_IWUSR); | |
de9ac07b PZ |
505 | if (output < 0) { |
506 | perror("failed to create output file"); | |
8d3eca20 | 507 | return -1; |
de9ac07b PZ |
508 | } |
509 | ||
d20deb64 ACM |
510 | rec->output = output; |
511 | ||
7865e817 | 512 | session = perf_session__new(output_name, O_WRONLY, |
d20deb64 | 513 | rec->write_mode == WRITE_FORCE, false, NULL); |
94c744b6 | 514 | if (session == NULL) { |
a9a70bbc ACM |
515 | pr_err("Not enough memory for reading perf file header\n"); |
516 | return -1; | |
517 | } | |
518 | ||
d20deb64 ACM |
519 | rec->session = session; |
520 | ||
781ba9d2 RR |
521 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) |
522 | perf_header__set_feat(&session->header, feat); | |
523 | ||
524 | if (rec->no_buildid) | |
525 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); | |
526 | ||
527 | if (!have_tracepoints(&evsel_list->entries)) | |
2eeaaa09 | 528 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
baa2f6ce | 529 | |
330aa675 SE |
530 | if (!rec->opts.branch_stack) |
531 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); | |
532 | ||
d20deb64 | 533 | if (!rec->file_new) { |
a91e5431 | 534 | err = perf_session__read_header(session, output); |
4dc0a04b | 535 | if (err < 0) |
39d17dac | 536 | goto out_delete_session; |
4dc0a04b ACM |
537 | } |
538 | ||
d4db3f16 | 539 | if (forks) { |
d20deb64 | 540 | err = perf_evlist__prepare_workload(evsel_list, opts, argv); |
35b9d88e ACM |
541 | if (err < 0) { |
542 | pr_err("Couldn't run the workload!\n"); | |
543 | goto out_delete_session; | |
856e9660 | 544 | } |
856e9660 PZ |
545 | } |
546 | ||
8d3eca20 DA |
547 | if (perf_record__open(rec) != 0) { |
548 | err = -1; | |
549 | goto out_delete_session; | |
550 | } | |
de9ac07b | 551 | |
712a4b60 | 552 | /* |
d20deb64 | 553 | * perf_session__delete(session) will be called at perf_record__exit() |
712a4b60 | 554 | */ |
d20deb64 | 555 | on_exit(perf_record__exit, rec); |
712a4b60 | 556 | |
d20deb64 | 557 | if (opts->pipe_output) { |
529870e3 TZ |
558 | err = perf_header__write_pipe(output); |
559 | if (err < 0) | |
8d3eca20 | 560 | goto out_delete_session; |
d20deb64 | 561 | } else if (rec->file_new) { |
a91e5431 ACM |
562 | err = perf_session__write_header(session, evsel_list, |
563 | output, false); | |
d5eed904 | 564 | if (err < 0) |
8d3eca20 | 565 | goto out_delete_session; |
56b03f3c ACM |
566 | } |
567 | ||
d3665498 | 568 | if (!rec->no_buildid |
e20960c0 | 569 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
d3665498 | 570 | pr_err("Couldn't generate buildids. " |
e20960c0 | 571 | "Use --no-buildid to profile anyway.\n"); |
8d3eca20 DA |
572 | err = -1; |
573 | goto out_delete_session; | |
e20960c0 RR |
574 | } |
575 | ||
d20deb64 | 576 | rec->post_processing_offset = lseek(output, 0, SEEK_CUR); |
6122e4e4 | 577 | |
743eb868 ACM |
578 | machine = perf_session__find_host_machine(session); |
579 | if (!machine) { | |
580 | pr_err("Couldn't find native kernel information.\n"); | |
8d3eca20 DA |
581 | err = -1; |
582 | goto out_delete_session; | |
743eb868 ACM |
583 | } |
584 | ||
d20deb64 | 585 | if (opts->pipe_output) { |
45694aa7 | 586 | err = perf_event__synthesize_attrs(tool, session, |
d20deb64 | 587 | process_synthesized_event); |
2c46dbb5 TZ |
588 | if (err < 0) { |
589 | pr_err("Couldn't synthesize attrs.\n"); | |
8d3eca20 | 590 | goto out_delete_session; |
2c46dbb5 | 591 | } |
cd19a035 | 592 | |
45694aa7 | 593 | err = perf_event__synthesize_event_types(tool, process_synthesized_event, |
743eb868 | 594 | machine); |
cd19a035 TZ |
595 | if (err < 0) { |
596 | pr_err("Couldn't synthesize event_types.\n"); | |
8d3eca20 | 597 | goto out_delete_session; |
cd19a035 | 598 | } |
9215545e | 599 | |
361c99a6 | 600 | if (have_tracepoints(&evsel_list->entries)) { |
63e0c771 TZ |
601 | /* |
602 | * FIXME err <= 0 here actually means that | |
603 | * there were no tracepoints so its not really | |
604 | * an error, just that we don't need to | |
605 | * synthesize anything. We really have to | |
606 | * return this more properly and also | |
607 | * propagate errors that now are calling die() | |
608 | */ | |
45694aa7 | 609 | err = perf_event__synthesize_tracing_data(tool, output, evsel_list, |
743eb868 | 610 | process_synthesized_event); |
63e0c771 TZ |
611 | if (err <= 0) { |
612 | pr_err("Couldn't record tracing data.\n"); | |
8d3eca20 | 613 | goto out_delete_session; |
63e0c771 | 614 | } |
d20deb64 | 615 | advance_output(rec, err); |
63e0c771 | 616 | } |
2c46dbb5 TZ |
617 | } |
618 | ||
45694aa7 | 619 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
743eb868 | 620 | machine, "_text"); |
70162138 | 621 | if (err < 0) |
45694aa7 | 622 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
743eb868 | 623 | machine, "_stext"); |
c1a3a4b9 ACM |
624 | if (err < 0) |
625 | pr_err("Couldn't record kernel reference relocation symbol\n" | |
626 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
627 | "Check /proc/kallsyms permission or run as root.\n"); | |
b7cece76 | 628 | |
45694aa7 | 629 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 630 | machine); |
c1a3a4b9 ACM |
631 | if (err < 0) |
632 | pr_err("Couldn't record kernel module information.\n" | |
633 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
634 | "Check /proc/modules permission or run as root.\n"); | |
635 | ||
a1645ce1 | 636 | if (perf_guest) |
45694aa7 | 637 | perf_session__process_machines(session, tool, |
8115d60c | 638 | perf_event__synthesize_guest_os); |
7c6a1c65 | 639 | |
bea03405 | 640 | if (!opts->target.system_wide) |
8d3eca20 | 641 | err = perf_event__synthesize_thread_map(tool, evsel_list->threads, |
7c940c18 | 642 | process_synthesized_event, |
743eb868 | 643 | machine); |
234fbbf5 | 644 | else |
8d3eca20 | 645 | err = perf_event__synthesize_threads(tool, process_synthesized_event, |
743eb868 | 646 | machine); |
7c6a1c65 | 647 | |
8d3eca20 DA |
648 | if (err != 0) |
649 | goto out_delete_session; | |
650 | ||
d20deb64 | 651 | if (rec->realtime_prio) { |
de9ac07b PZ |
652 | struct sched_param param; |
653 | ||
d20deb64 | 654 | param.sched_priority = rec->realtime_prio; |
de9ac07b | 655 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
6beba7ad | 656 | pr_err("Could not set realtime priority.\n"); |
8d3eca20 DA |
657 | err = -1; |
658 | goto out_delete_session; | |
de9ac07b PZ |
659 | } |
660 | } | |
661 | ||
764e16a3 DA |
662 | perf_evlist__enable(evsel_list); |
663 | ||
856e9660 PZ |
664 | /* |
665 | * Let the child rip | |
666 | */ | |
d4db3f16 | 667 | if (forks) |
35b9d88e | 668 | perf_evlist__start_workload(evsel_list); |
856e9660 | 669 | |
649c48a9 | 670 | for (;;) { |
d20deb64 | 671 | int hits = rec->samples; |
de9ac07b | 672 | |
8d3eca20 DA |
673 | if (perf_record__mmap_read_all(rec) < 0) { |
674 | err = -1; | |
675 | goto out_delete_session; | |
676 | } | |
de9ac07b | 677 | |
d20deb64 | 678 | if (hits == rec->samples) { |
649c48a9 PZ |
679 | if (done) |
680 | break; | |
5c581041 | 681 | err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1); |
8b412664 PZ |
682 | waking++; |
683 | } | |
684 | ||
4152ab37 ACM |
685 | if (done) |
686 | perf_evlist__disable(evsel_list); | |
de9ac07b PZ |
687 | } |
688 | ||
18483b81 | 689 | if (quiet || signr == SIGUSR1) |
b44308f5 ACM |
690 | return 0; |
691 | ||
8b412664 PZ |
692 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
693 | ||
021e9f47 IM |
694 | /* |
695 | * Approximate RIP event size: 24 bytes. | |
696 | */ | |
697 | fprintf(stderr, | |
9486aa38 | 698 | "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n", |
d20deb64 | 699 | (double)rec->bytes_written / 1024.0 / 1024.0, |
021e9f47 | 700 | output_name, |
d20deb64 | 701 | rec->bytes_written / 24); |
addc2785 | 702 | |
de9ac07b | 703 | return 0; |
39d17dac ACM |
704 | |
705 | out_delete_session: | |
706 | perf_session__delete(session); | |
707 | return err; | |
de9ac07b | 708 | } |
0e9b20b8 | 709 | |
bdfebd84 RAV |
710 | #define BRANCH_OPT(n, m) \ |
711 | { .name = n, .mode = (m) } | |
712 | ||
713 | #define BRANCH_END { .name = NULL } | |
714 | ||
715 | struct branch_mode { | |
716 | const char *name; | |
717 | int mode; | |
718 | }; | |
719 | ||
720 | static const struct branch_mode branch_modes[] = { | |
721 | BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER), | |
722 | BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL), | |
723 | BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV), | |
724 | BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY), | |
725 | BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL), | |
726 | BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN), | |
727 | BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL), | |
728 | BRANCH_END | |
729 | }; | |
730 | ||
731 | static int | |
a5aabdac | 732 | parse_branch_stack(const struct option *opt, const char *str, int unset) |
bdfebd84 RAV |
733 | { |
734 | #define ONLY_PLM \ | |
735 | (PERF_SAMPLE_BRANCH_USER |\ | |
736 | PERF_SAMPLE_BRANCH_KERNEL |\ | |
737 | PERF_SAMPLE_BRANCH_HV) | |
738 | ||
739 | uint64_t *mode = (uint64_t *)opt->value; | |
740 | const struct branch_mode *br; | |
a5aabdac | 741 | char *s, *os = NULL, *p; |
bdfebd84 RAV |
742 | int ret = -1; |
743 | ||
a5aabdac SE |
744 | if (unset) |
745 | return 0; | |
bdfebd84 | 746 | |
a5aabdac SE |
747 | /* |
748 | * cannot set it twice, -b + --branch-filter for instance | |
749 | */ | |
750 | if (*mode) | |
bdfebd84 RAV |
751 | return -1; |
752 | ||
a5aabdac SE |
753 | /* str may be NULL in case no arg is passed to -b */ |
754 | if (str) { | |
755 | /* because str is read-only */ | |
756 | s = os = strdup(str); | |
757 | if (!s) | |
758 | return -1; | |
759 | ||
760 | for (;;) { | |
761 | p = strchr(s, ','); | |
762 | if (p) | |
763 | *p = '\0'; | |
764 | ||
765 | for (br = branch_modes; br->name; br++) { | |
766 | if (!strcasecmp(s, br->name)) | |
767 | break; | |
768 | } | |
769 | if (!br->name) { | |
770 | ui__warning("unknown branch filter %s," | |
771 | " check man page\n", s); | |
772 | goto error; | |
773 | } | |
bdfebd84 | 774 | |
a5aabdac | 775 | *mode |= br->mode; |
bdfebd84 | 776 | |
a5aabdac SE |
777 | if (!p) |
778 | break; | |
bdfebd84 | 779 | |
a5aabdac SE |
780 | s = p + 1; |
781 | } | |
bdfebd84 RAV |
782 | } |
783 | ret = 0; | |
784 | ||
a5aabdac | 785 | /* default to any branch */ |
bdfebd84 | 786 | if ((*mode & ~ONLY_PLM) == 0) { |
a5aabdac | 787 | *mode = PERF_SAMPLE_BRANCH_ANY; |
bdfebd84 RAV |
788 | } |
789 | error: | |
790 | free(os); | |
791 | return ret; | |
792 | } | |
793 | ||
95485b1c | 794 | #ifdef LIBUNWIND_SUPPORT |
26d33022 JO |
795 | static int get_stack_size(char *str, unsigned long *_size) |
796 | { | |
797 | char *endptr; | |
798 | unsigned long size; | |
799 | unsigned long max_size = round_down(USHRT_MAX, sizeof(u64)); | |
800 | ||
801 | size = strtoul(str, &endptr, 0); | |
802 | ||
803 | do { | |
804 | if (*endptr) | |
805 | break; | |
806 | ||
807 | size = round_up(size, sizeof(u64)); | |
808 | if (!size || size > max_size) | |
809 | break; | |
810 | ||
811 | *_size = size; | |
812 | return 0; | |
813 | ||
814 | } while (0); | |
815 | ||
816 | pr_err("callchain: Incorrect stack dump size (max %ld): %s\n", | |
817 | max_size, str); | |
818 | return -1; | |
819 | } | |
95485b1c | 820 | #endif /* LIBUNWIND_SUPPORT */ |
26d33022 JO |
821 | |
822 | static int | |
1d037ca1 | 823 | parse_callchain_opt(const struct option *opt __maybe_unused, const char *arg, |
26d33022 JO |
824 | int unset) |
825 | { | |
826 | struct perf_record *rec = (struct perf_record *)opt->value; | |
827 | char *tok, *name, *saveptr = NULL; | |
828 | char *buf; | |
829 | int ret = -1; | |
830 | ||
831 | /* --no-call-graph */ | |
832 | if (unset) | |
833 | return 0; | |
834 | ||
835 | /* We specified default option if none is provided. */ | |
836 | BUG_ON(!arg); | |
837 | ||
838 | /* We need buffer that we know we can write to. */ | |
839 | buf = malloc(strlen(arg) + 1); | |
840 | if (!buf) | |
841 | return -ENOMEM; | |
842 | ||
843 | strcpy(buf, arg); | |
844 | ||
845 | tok = strtok_r((char *)buf, ",", &saveptr); | |
846 | name = tok ? : (char *)buf; | |
847 | ||
848 | do { | |
849 | /* Framepointer style */ | |
850 | if (!strncmp(name, "fp", sizeof("fp"))) { | |
851 | if (!strtok_r(NULL, ",", &saveptr)) { | |
852 | rec->opts.call_graph = CALLCHAIN_FP; | |
853 | ret = 0; | |
854 | } else | |
855 | pr_err("callchain: No more arguments " | |
856 | "needed for -g fp\n"); | |
857 | break; | |
858 | ||
95485b1c | 859 | #ifdef LIBUNWIND_SUPPORT |
26d33022 JO |
860 | /* Dwarf style */ |
861 | } else if (!strncmp(name, "dwarf", sizeof("dwarf"))) { | |
61eaa3be ACM |
862 | const unsigned long default_stack_dump_size = 8192; |
863 | ||
26d33022 JO |
864 | ret = 0; |
865 | rec->opts.call_graph = CALLCHAIN_DWARF; | |
866 | rec->opts.stack_dump_size = default_stack_dump_size; | |
867 | ||
868 | tok = strtok_r(NULL, ",", &saveptr); | |
869 | if (tok) { | |
870 | unsigned long size = 0; | |
871 | ||
872 | ret = get_stack_size(tok, &size); | |
873 | rec->opts.stack_dump_size = size; | |
874 | } | |
875 | ||
876 | if (!ret) | |
877 | pr_debug("callchain: stack dump size %d\n", | |
878 | rec->opts.stack_dump_size); | |
95485b1c | 879 | #endif /* LIBUNWIND_SUPPORT */ |
26d33022 JO |
880 | } else { |
881 | pr_err("callchain: Unknown -g option " | |
882 | "value: %s\n", arg); | |
883 | break; | |
884 | } | |
885 | ||
886 | } while (0); | |
887 | ||
888 | free(buf); | |
889 | ||
890 | if (!ret) | |
891 | pr_debug("callchain: type %d\n", rec->opts.call_graph); | |
892 | ||
893 | return ret; | |
894 | } | |
895 | ||
0e9b20b8 | 896 | static const char * const record_usage[] = { |
9e096753 MG |
897 | "perf record [<options>] [<command>]", |
898 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
899 | NULL |
900 | }; | |
901 | ||
d20deb64 ACM |
902 | /* |
903 | * XXX Ideally would be local to cmd_record() and passed to a perf_record__new | |
904 | * because we need to have access to it in perf_record__exit, that is called | |
905 | * after cmd_record() exits, but since record_options need to be accessible to | |
906 | * builtin-script, leave it here. | |
907 | * | |
908 | * At least we don't ouch it in all the other functions here directly. | |
909 | * | |
910 | * Just say no to tons of global variables, sigh. | |
911 | */ | |
912 | static struct perf_record record = { | |
913 | .opts = { | |
d20deb64 ACM |
914 | .mmap_pages = UINT_MAX, |
915 | .user_freq = UINT_MAX, | |
916 | .user_interval = ULLONG_MAX, | |
447a6013 | 917 | .freq = 4000, |
d1cb9fce NK |
918 | .target = { |
919 | .uses_mmap = true, | |
920 | }, | |
d20deb64 ACM |
921 | }, |
922 | .write_mode = WRITE_FORCE, | |
923 | .file_new = true, | |
924 | }; | |
7865e817 | 925 | |
61eaa3be ACM |
926 | #define CALLCHAIN_HELP "do call-graph (stack chain/backtrace) recording: " |
927 | ||
928 | #ifdef LIBUNWIND_SUPPORT | |
929 | static const char callchain_help[] = CALLCHAIN_HELP "[fp] dwarf"; | |
930 | #else | |
931 | static const char callchain_help[] = CALLCHAIN_HELP "[fp]"; | |
932 | #endif | |
933 | ||
d20deb64 ACM |
934 | /* |
935 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
936 | * with it and switch to use the library functions in perf_evlist that came | |
937 | * from builtin-record.c, i.e. use perf_record_opts, | |
938 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', | |
939 | * using pipes, etc. | |
940 | */ | |
bca647aa | 941 | const struct option record_options[] = { |
d20deb64 | 942 | OPT_CALLBACK('e', "event", &record.evlist, "event", |
86847b62 | 943 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 944 | parse_events_option), |
d20deb64 | 945 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
c171b552 | 946 | "event filter", parse_filter), |
bea03405 | 947 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", |
d6d901c2 | 948 | "record events on existing process id"), |
bea03405 | 949 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", |
d6d901c2 | 950 | "record events on existing thread id"), |
d20deb64 | 951 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
0e9b20b8 | 952 | "collect data with this RT SCHED_FIFO priority"), |
d20deb64 | 953 | OPT_BOOLEAN('D', "no-delay", &record.opts.no_delay, |
acac03fa | 954 | "collect data without buffering"), |
d20deb64 | 955 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
daac07b2 | 956 | "collect raw sample records from all opened counters"), |
bea03405 | 957 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, |
0e9b20b8 | 958 | "system-wide collection from all CPUs"), |
d20deb64 | 959 | OPT_BOOLEAN('A', "append", &record.append_file, |
abaff32a | 960 | "append to the output file to do incremental profiling"), |
bea03405 | 961 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", |
c45c6ea2 | 962 | "list of cpus to monitor"), |
d20deb64 | 963 | OPT_BOOLEAN('f', "force", &record.force, |
7865e817 | 964 | "overwrite existing data file (deprecated)"), |
d20deb64 ACM |
965 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
966 | OPT_STRING('o', "output", &record.output_name, "file", | |
abaff32a | 967 | "output file name"), |
d20deb64 | 968 | OPT_BOOLEAN('i', "no-inherit", &record.opts.no_inherit, |
2e6cdf99 | 969 | "child tasks do not inherit counters"), |
d20deb64 ACM |
970 | OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"), |
971 | OPT_UINTEGER('m', "mmap-pages", &record.opts.mmap_pages, | |
01c2d99b | 972 | "number of mmap data pages"), |
d20deb64 | 973 | OPT_BOOLEAN(0, "group", &record.opts.group, |
43bece79 | 974 | "put the counters into a counter group"), |
26d33022 JO |
975 | OPT_CALLBACK_DEFAULT('g', "call-graph", &record, "mode[,dump_size]", |
976 | callchain_help, &parse_callchain_opt, | |
977 | "fp"), | |
c0555642 | 978 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 979 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 980 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
d20deb64 | 981 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
649c48a9 | 982 | "per thread counts"), |
d20deb64 | 983 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, |
4bba828d | 984 | "Sample addresses"), |
d20deb64 | 985 | OPT_BOOLEAN('T', "timestamp", &record.opts.sample_time, "Sample timestamps"), |
3e76ac78 | 986 | OPT_BOOLEAN('P', "period", &record.opts.period, "Sample period"), |
d20deb64 | 987 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, |
649c48a9 | 988 | "don't sample"), |
d20deb64 | 989 | OPT_BOOLEAN('N', "no-buildid-cache", &record.no_buildid_cache, |
a1ac1d3c | 990 | "do not update the buildid cache"), |
d20deb64 | 991 | OPT_BOOLEAN('B', "no-buildid", &record.no_buildid, |
baa2f6ce | 992 | "do not collect buildids in perf.data"), |
d20deb64 | 993 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
023695d9 SE |
994 | "monitor event in cgroup name only", |
995 | parse_cgroups), | |
bea03405 NK |
996 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", |
997 | "user to profile"), | |
a5aabdac SE |
998 | |
999 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, | |
1000 | "branch any", "sample any taken branches", | |
1001 | parse_branch_stack), | |
1002 | ||
1003 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, | |
1004 | "branch filter mask", "branch stack filter modes", | |
bdfebd84 | 1005 | parse_branch_stack), |
0e9b20b8 IM |
1006 | OPT_END() |
1007 | }; | |
1008 | ||
1d037ca1 | 1009 | int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused) |
0e9b20b8 | 1010 | { |
69aad6f1 ACM |
1011 | int err = -ENOMEM; |
1012 | struct perf_evsel *pos; | |
d20deb64 ACM |
1013 | struct perf_evlist *evsel_list; |
1014 | struct perf_record *rec = &record; | |
16ad2ffb | 1015 | char errbuf[BUFSIZ]; |
0e9b20b8 | 1016 | |
7e2ed097 | 1017 | evsel_list = perf_evlist__new(NULL, NULL); |
361c99a6 ACM |
1018 | if (evsel_list == NULL) |
1019 | return -ENOMEM; | |
1020 | ||
d20deb64 ACM |
1021 | rec->evlist = evsel_list; |
1022 | ||
bca647aa | 1023 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 1024 | PARSE_OPT_STOP_AT_NON_OPTION); |
d67356e7 | 1025 | if (!argc && perf_target__none(&rec->opts.target)) |
bca647aa | 1026 | usage_with_options(record_usage, record_options); |
0e9b20b8 | 1027 | |
d20deb64 | 1028 | if (rec->force && rec->append_file) { |
3780f488 NK |
1029 | ui__error("Can't overwrite and append at the same time." |
1030 | " You need to choose between -f and -A"); | |
bca647aa | 1031 | usage_with_options(record_usage, record_options); |
d20deb64 ACM |
1032 | } else if (rec->append_file) { |
1033 | rec->write_mode = WRITE_APPEND; | |
7865e817 | 1034 | } else { |
d20deb64 | 1035 | rec->write_mode = WRITE_FORCE; |
7865e817 FW |
1036 | } |
1037 | ||
bea03405 | 1038 | if (nr_cgroups && !rec->opts.target.system_wide) { |
3780f488 NK |
1039 | ui__error("cgroup monitoring only available in" |
1040 | " system-wide mode\n"); | |
023695d9 SE |
1041 | usage_with_options(record_usage, record_options); |
1042 | } | |
1043 | ||
655000e7 | 1044 | symbol__init(); |
baa2f6ce | 1045 | |
ec80fde7 | 1046 | if (symbol_conf.kptr_restrict) |
646aaea6 ACM |
1047 | pr_warning( |
1048 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
1049 | "check /proc/sys/kernel/kptr_restrict.\n\n" | |
1050 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
1051 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
1052 | "Samples in kernel modules won't be resolved at all.\n\n" | |
1053 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
1054 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
ec80fde7 | 1055 | |
d20deb64 | 1056 | if (rec->no_buildid_cache || rec->no_buildid) |
a1ac1d3c | 1057 | disable_buildid_cache(); |
655000e7 | 1058 | |
361c99a6 ACM |
1059 | if (evsel_list->nr_entries == 0 && |
1060 | perf_evlist__add_default(evsel_list) < 0) { | |
69aad6f1 ACM |
1061 | pr_err("Not enough memory for event selector list\n"); |
1062 | goto out_symbol_exit; | |
bbd36e5e | 1063 | } |
0e9b20b8 | 1064 | |
16ad2ffb NK |
1065 | err = perf_target__validate(&rec->opts.target); |
1066 | if (err) { | |
1067 | perf_target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); | |
1068 | ui__warning("%s", errbuf); | |
1069 | } | |
1070 | ||
1071 | err = perf_target__parse_uid(&rec->opts.target); | |
1072 | if (err) { | |
1073 | int saved_errno = errno; | |
4bd0f2d2 | 1074 | |
16ad2ffb | 1075 | perf_target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
3780f488 | 1076 | ui__error("%s", errbuf); |
16ad2ffb NK |
1077 | |
1078 | err = -saved_errno; | |
0d37aa34 | 1079 | goto out_free_fd; |
16ad2ffb | 1080 | } |
0d37aa34 | 1081 | |
16ad2ffb | 1082 | err = -ENOMEM; |
b809ac10 | 1083 | if (perf_evlist__create_maps(evsel_list, &rec->opts.target) < 0) |
dd7927f4 | 1084 | usage_with_options(record_usage, record_options); |
69aad6f1 | 1085 | |
361c99a6 | 1086 | list_for_each_entry(pos, &evsel_list->entries, node) { |
7289f83c | 1087 | if (perf_header__push_event(pos->attr.config, perf_evsel__name(pos))) |
ad7f4e3f | 1088 | goto out_free_fd; |
d6d901c2 | 1089 | } |
5c581041 | 1090 | |
d20deb64 ACM |
1091 | if (rec->opts.user_interval != ULLONG_MAX) |
1092 | rec->opts.default_interval = rec->opts.user_interval; | |
1093 | if (rec->opts.user_freq != UINT_MAX) | |
1094 | rec->opts.freq = rec->opts.user_freq; | |
f9212819 | 1095 | |
7e4ff9e3 MG |
1096 | /* |
1097 | * User specified count overrides default frequency. | |
1098 | */ | |
d20deb64 ACM |
1099 | if (rec->opts.default_interval) |
1100 | rec->opts.freq = 0; | |
1101 | else if (rec->opts.freq) { | |
1102 | rec->opts.default_interval = rec->opts.freq; | |
7e4ff9e3 | 1103 | } else { |
3780f488 | 1104 | ui__error("frequency and count are zero, aborting\n"); |
39d17dac | 1105 | err = -EINVAL; |
5c581041 | 1106 | goto out_free_fd; |
7e4ff9e3 MG |
1107 | } |
1108 | ||
d20deb64 | 1109 | err = __cmd_record(&record, argc, argv); |
39d17dac | 1110 | out_free_fd: |
7e2ed097 | 1111 | perf_evlist__delete_maps(evsel_list); |
d65a458b ACM |
1112 | out_symbol_exit: |
1113 | symbol__exit(); | |
39d17dac | 1114 | return err; |
0e9b20b8 | 1115 | } |