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 | |
78da39fa BR |
34 | #ifndef HAVE_ON_EXIT |
35 | #ifndef ATEXIT_MAX | |
36 | #define ATEXIT_MAX 32 | |
37 | #endif | |
38 | static int __on_exit_count = 0; | |
39 | typedef void (*on_exit_func_t) (int, void *); | |
40 | static on_exit_func_t __on_exit_funcs[ATEXIT_MAX]; | |
41 | static void *__on_exit_args[ATEXIT_MAX]; | |
42 | static int __exitcode = 0; | |
43 | static void __handle_on_exit_funcs(void); | |
44 | static int on_exit(on_exit_func_t function, void *arg); | |
45 | #define exit(x) (exit)(__exitcode = (x)) | |
46 | ||
47 | static int on_exit(on_exit_func_t function, void *arg) | |
48 | { | |
49 | if (__on_exit_count == ATEXIT_MAX) | |
50 | return -ENOMEM; | |
51 | else if (__on_exit_count == 0) | |
52 | atexit(__handle_on_exit_funcs); | |
53 | __on_exit_funcs[__on_exit_count] = function; | |
54 | __on_exit_args[__on_exit_count++] = arg; | |
55 | return 0; | |
56 | } | |
57 | ||
58 | static void __handle_on_exit_funcs(void) | |
59 | { | |
60 | int i; | |
61 | for (i = 0; i < __on_exit_count; i++) | |
62 | __on_exit_funcs[i] (__exitcode, __on_exit_args[i]); | |
63 | } | |
64 | #endif | |
65 | ||
7865e817 FW |
66 | enum write_mode_t { |
67 | WRITE_FORCE, | |
68 | WRITE_APPEND | |
69 | }; | |
70 | ||
d20deb64 | 71 | struct perf_record { |
45694aa7 | 72 | struct perf_tool tool; |
d20deb64 ACM |
73 | struct perf_record_opts opts; |
74 | u64 bytes_written; | |
75 | const char *output_name; | |
76 | struct perf_evlist *evlist; | |
77 | struct perf_session *session; | |
78 | const char *progname; | |
79 | int output; | |
80 | unsigned int page_size; | |
81 | int realtime_prio; | |
82 | enum write_mode_t write_mode; | |
83 | bool no_buildid; | |
84 | bool no_buildid_cache; | |
85 | bool force; | |
86 | bool file_new; | |
87 | bool append_file; | |
88 | long samples; | |
89 | off_t post_processing_offset; | |
0f82ebc4 | 90 | }; |
a21ca2ca | 91 | |
d20deb64 | 92 | static void advance_output(struct perf_record *rec, size_t size) |
9215545e | 93 | { |
d20deb64 | 94 | rec->bytes_written += size; |
9215545e TZ |
95 | } |
96 | ||
8d3eca20 | 97 | static int write_output(struct perf_record *rec, void *buf, size_t size) |
f5970550 PZ |
98 | { |
99 | while (size) { | |
d20deb64 | 100 | int ret = write(rec->output, buf, size); |
f5970550 | 101 | |
8d3eca20 DA |
102 | if (ret < 0) { |
103 | pr_err("failed to write\n"); | |
104 | return -1; | |
105 | } | |
f5970550 PZ |
106 | |
107 | size -= ret; | |
108 | buf += ret; | |
109 | ||
d20deb64 | 110 | rec->bytes_written += ret; |
f5970550 | 111 | } |
8d3eca20 DA |
112 | |
113 | return 0; | |
f5970550 PZ |
114 | } |
115 | ||
45694aa7 | 116 | static int process_synthesized_event(struct perf_tool *tool, |
d20deb64 | 117 | union perf_event *event, |
1d037ca1 IT |
118 | struct perf_sample *sample __maybe_unused, |
119 | struct machine *machine __maybe_unused) | |
234fbbf5 | 120 | { |
45694aa7 | 121 | struct perf_record *rec = container_of(tool, struct perf_record, tool); |
8d3eca20 DA |
122 | if (write_output(rec, event, event->header.size) < 0) |
123 | return -1; | |
124 | ||
234fbbf5 ACM |
125 | return 0; |
126 | } | |
127 | ||
8d3eca20 | 128 | static int perf_record__mmap_read(struct perf_record *rec, |
d20deb64 | 129 | struct perf_mmap *md) |
de9ac07b | 130 | { |
744bd8aa | 131 | unsigned int head = perf_mmap__read_head(md); |
de9ac07b | 132 | unsigned int old = md->prev; |
d20deb64 | 133 | unsigned char *data = md->base + rec->page_size; |
de9ac07b PZ |
134 | unsigned long size; |
135 | void *buf; | |
8d3eca20 | 136 | int rc = 0; |
de9ac07b | 137 | |
dc82009a | 138 | if (old == head) |
8d3eca20 | 139 | return 0; |
dc82009a | 140 | |
d20deb64 | 141 | rec->samples++; |
de9ac07b PZ |
142 | |
143 | size = head - old; | |
144 | ||
145 | if ((old & md->mask) + size != (head & md->mask)) { | |
146 | buf = &data[old & md->mask]; | |
147 | size = md->mask + 1 - (old & md->mask); | |
148 | old += size; | |
021e9f47 | 149 | |
8d3eca20 DA |
150 | if (write_output(rec, buf, size) < 0) { |
151 | rc = -1; | |
152 | goto out; | |
153 | } | |
de9ac07b PZ |
154 | } |
155 | ||
156 | buf = &data[old & md->mask]; | |
157 | size = head - old; | |
158 | old += size; | |
021e9f47 | 159 | |
8d3eca20 DA |
160 | if (write_output(rec, buf, size) < 0) { |
161 | rc = -1; | |
162 | goto out; | |
163 | } | |
de9ac07b PZ |
164 | |
165 | md->prev = old; | |
115d2d89 | 166 | perf_mmap__write_tail(md, old); |
8d3eca20 DA |
167 | |
168 | out: | |
169 | return rc; | |
de9ac07b PZ |
170 | } |
171 | ||
172 | static volatile int done = 0; | |
f7b7c26e | 173 | static volatile int signr = -1; |
33e49ea7 | 174 | static volatile int child_finished = 0; |
de9ac07b | 175 | |
16c8a109 | 176 | static void sig_handler(int sig) |
de9ac07b | 177 | { |
33e49ea7 AK |
178 | if (sig == SIGCHLD) |
179 | child_finished = 1; | |
180 | ||
16c8a109 | 181 | done = 1; |
f7b7c26e PZ |
182 | signr = sig; |
183 | } | |
184 | ||
1d037ca1 | 185 | static void perf_record__sig_exit(int exit_status __maybe_unused, void *arg) |
f7b7c26e | 186 | { |
d20deb64 | 187 | struct perf_record *rec = arg; |
33e49ea7 AK |
188 | int status; |
189 | ||
d20deb64 | 190 | if (rec->evlist->workload.pid > 0) { |
33e49ea7 | 191 | if (!child_finished) |
d20deb64 | 192 | kill(rec->evlist->workload.pid, SIGTERM); |
33e49ea7 AK |
193 | |
194 | wait(&status); | |
195 | if (WIFSIGNALED(status)) | |
d20deb64 | 196 | psignal(WTERMSIG(status), rec->progname); |
33e49ea7 | 197 | } |
933da83a | 198 | |
18483b81 | 199 | if (signr == -1 || signr == SIGUSR1) |
f7b7c26e PZ |
200 | return; |
201 | ||
202 | signal(signr, SIG_DFL); | |
203 | kill(getpid(), signr); | |
de9ac07b PZ |
204 | } |
205 | ||
a91e5431 ACM |
206 | static bool perf_evlist__equal(struct perf_evlist *evlist, |
207 | struct perf_evlist *other) | |
208 | { | |
209 | struct perf_evsel *pos, *pair; | |
210 | ||
211 | if (evlist->nr_entries != other->nr_entries) | |
212 | return false; | |
213 | ||
0c21f736 | 214 | pair = perf_evlist__first(other); |
a91e5431 ACM |
215 | |
216 | list_for_each_entry(pos, &evlist->entries, node) { | |
217 | if (memcmp(&pos->attr, &pair->attr, sizeof(pos->attr) != 0)) | |
218 | return false; | |
0c21f736 | 219 | pair = perf_evsel__next(pair); |
a91e5431 ACM |
220 | } |
221 | ||
222 | return true; | |
223 | } | |
224 | ||
8d3eca20 | 225 | static int perf_record__open(struct perf_record *rec) |
dd7927f4 | 226 | { |
56e52e85 | 227 | char msg[512]; |
6a4bb04c | 228 | struct perf_evsel *pos; |
d20deb64 ACM |
229 | struct perf_evlist *evlist = rec->evlist; |
230 | struct perf_session *session = rec->session; | |
231 | struct perf_record_opts *opts = &rec->opts; | |
8d3eca20 | 232 | int rc = 0; |
dd7927f4 | 233 | |
f77a9518 | 234 | perf_evlist__config(evlist, opts); |
cac21425 | 235 | |
dd7927f4 | 236 | list_for_each_entry(pos, &evlist->entries, node) { |
dd7927f4 | 237 | try_again: |
6a4bb04c | 238 | if (perf_evsel__open(pos, evlist->cpus, evlist->threads) < 0) { |
56e52e85 | 239 | if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) { |
d6d901c2 | 240 | if (verbose) |
c0a54341 | 241 | ui__warning("%s\n", msg); |
d6d901c2 ZY |
242 | goto try_again; |
243 | } | |
ca6a4258 | 244 | |
56e52e85 ACM |
245 | rc = -errno; |
246 | perf_evsel__open_strerror(pos, &opts->target, | |
247 | errno, msg, sizeof(msg)); | |
248 | ui__error("%s\n", msg); | |
8d3eca20 | 249 | goto out; |
c171b552 LZ |
250 | } |
251 | } | |
a43d3f08 | 252 | |
1491a632 | 253 | if (perf_evlist__apply_filters(evlist)) { |
0a102479 FW |
254 | error("failed to set filter with %d (%s)\n", errno, |
255 | strerror(errno)); | |
8d3eca20 DA |
256 | rc = -1; |
257 | goto out; | |
0a102479 FW |
258 | } |
259 | ||
18e60939 | 260 | if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) { |
8d3eca20 DA |
261 | if (errno == EPERM) { |
262 | pr_err("Permission error mapping pages.\n" | |
263 | "Consider increasing " | |
264 | "/proc/sys/kernel/perf_event_mlock_kb,\n" | |
265 | "or try again with a smaller value of -m/--mmap_pages.\n" | |
266 | "(current value: %d)\n", opts->mmap_pages); | |
267 | rc = -errno; | |
0089fa98 JO |
268 | } else if (!is_power_of_2(opts->mmap_pages) && |
269 | (opts->mmap_pages != UINT_MAX)) { | |
8d3eca20 DA |
270 | pr_err("--mmap_pages/-m value must be a power of two."); |
271 | rc = -EINVAL; | |
272 | } else { | |
273 | pr_err("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
274 | rc = -errno; | |
275 | } | |
276 | goto out; | |
18e60939 | 277 | } |
0a27d7f9 | 278 | |
d20deb64 | 279 | if (rec->file_new) |
a91e5431 ACM |
280 | session->evlist = evlist; |
281 | else { | |
282 | if (!perf_evlist__equal(session->evlist, evlist)) { | |
283 | fprintf(stderr, "incompatible append\n"); | |
8d3eca20 DA |
284 | rc = -1; |
285 | goto out; | |
a91e5431 ACM |
286 | } |
287 | } | |
288 | ||
7b56cce2 | 289 | perf_session__set_id_hdr_size(session); |
8d3eca20 DA |
290 | out: |
291 | return rc; | |
16c8a109 PZ |
292 | } |
293 | ||
d20deb64 | 294 | static int process_buildids(struct perf_record *rec) |
6122e4e4 | 295 | { |
d20deb64 | 296 | u64 size = lseek(rec->output, 0, SEEK_CUR); |
6122e4e4 | 297 | |
9f591fd7 ACM |
298 | if (size == 0) |
299 | return 0; | |
300 | ||
d20deb64 ACM |
301 | rec->session->fd = rec->output; |
302 | return __perf_session__process_events(rec->session, rec->post_processing_offset, | |
303 | size - rec->post_processing_offset, | |
6122e4e4 ACM |
304 | size, &build_id__mark_dso_hit_ops); |
305 | } | |
306 | ||
8d3eca20 | 307 | static void perf_record__exit(int status, void *arg) |
f5970550 | 308 | { |
d20deb64 ACM |
309 | struct perf_record *rec = arg; |
310 | ||
8d3eca20 DA |
311 | if (status != 0) |
312 | return; | |
313 | ||
d20deb64 ACM |
314 | if (!rec->opts.pipe_output) { |
315 | rec->session->header.data_size += rec->bytes_written; | |
316 | ||
317 | if (!rec->no_buildid) | |
318 | process_buildids(rec); | |
319 | perf_session__write_header(rec->session, rec->evlist, | |
320 | rec->output, true); | |
321 | perf_session__delete(rec->session); | |
322 | perf_evlist__delete(rec->evlist); | |
d65a458b | 323 | symbol__exit(); |
c7929e47 | 324 | } |
f5970550 PZ |
325 | } |
326 | ||
8115d60c | 327 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
328 | { |
329 | int err; | |
45694aa7 | 330 | struct perf_tool *tool = data; |
a1645ce1 ZY |
331 | /* |
332 | *As for guest kernel when processing subcommand record&report, | |
333 | *we arrange module mmap prior to guest kernel mmap and trigger | |
334 | *a preload dso because default guest module symbols are loaded | |
335 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
336 | *method is used to avoid symbol missing when the first addr is | |
337 | *in module instead of in guest kernel. | |
338 | */ | |
45694aa7 | 339 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 340 | machine); |
a1645ce1 ZY |
341 | if (err < 0) |
342 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 343 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 344 | |
a1645ce1 ZY |
345 | /* |
346 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
347 | * have no _text sometimes. | |
348 | */ | |
45694aa7 | 349 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
743eb868 | 350 | machine, "_text"); |
a1645ce1 | 351 | if (err < 0) |
45694aa7 | 352 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
743eb868 | 353 | machine, "_stext"); |
a1645ce1 ZY |
354 | if (err < 0) |
355 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 356 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
357 | } |
358 | ||
98402807 FW |
359 | static struct perf_event_header finished_round_event = { |
360 | .size = sizeof(struct perf_event_header), | |
361 | .type = PERF_RECORD_FINISHED_ROUND, | |
362 | }; | |
363 | ||
8d3eca20 | 364 | static int perf_record__mmap_read_all(struct perf_record *rec) |
98402807 | 365 | { |
0e2e63dd | 366 | int i; |
8d3eca20 | 367 | int rc = 0; |
98402807 | 368 | |
d20deb64 | 369 | for (i = 0; i < rec->evlist->nr_mmaps; i++) { |
8d3eca20 DA |
370 | if (rec->evlist->mmap[i].base) { |
371 | if (perf_record__mmap_read(rec, &rec->evlist->mmap[i]) != 0) { | |
372 | rc = -1; | |
373 | goto out; | |
374 | } | |
375 | } | |
98402807 FW |
376 | } |
377 | ||
2eeaaa09 | 378 | if (perf_header__has_feat(&rec->session->header, HEADER_TRACING_DATA)) |
8d3eca20 DA |
379 | rc = write_output(rec, &finished_round_event, |
380 | sizeof(finished_round_event)); | |
381 | ||
382 | out: | |
383 | return rc; | |
98402807 FW |
384 | } |
385 | ||
d20deb64 | 386 | static int __cmd_record(struct perf_record *rec, int argc, const char **argv) |
16c8a109 | 387 | { |
abaff32a | 388 | struct stat st; |
abaff32a | 389 | int flags; |
781ba9d2 | 390 | int err, output, feat; |
8b412664 | 391 | unsigned long waking = 0; |
46be604b | 392 | const bool forks = argc > 0; |
23346f21 | 393 | struct machine *machine; |
45694aa7 | 394 | struct perf_tool *tool = &rec->tool; |
d20deb64 ACM |
395 | struct perf_record_opts *opts = &rec->opts; |
396 | struct perf_evlist *evsel_list = rec->evlist; | |
397 | const char *output_name = rec->output_name; | |
398 | struct perf_session *session; | |
2711926a | 399 | bool disabled = false; |
de9ac07b | 400 | |
d20deb64 | 401 | rec->progname = argv[0]; |
33e49ea7 | 402 | |
d20deb64 | 403 | rec->page_size = sysconf(_SC_PAGE_SIZE); |
de9ac07b | 404 | |
d20deb64 | 405 | on_exit(perf_record__sig_exit, rec); |
f5970550 PZ |
406 | signal(SIGCHLD, sig_handler); |
407 | signal(SIGINT, sig_handler); | |
18483b81 | 408 | signal(SIGUSR1, sig_handler); |
f5970550 | 409 | |
d7065adb FBH |
410 | if (!output_name) { |
411 | if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode)) | |
d20deb64 | 412 | opts->pipe_output = true; |
d7065adb | 413 | else |
d20deb64 | 414 | rec->output_name = output_name = "perf.data"; |
d7065adb FBH |
415 | } |
416 | if (output_name) { | |
417 | if (!strcmp(output_name, "-")) | |
d20deb64 | 418 | opts->pipe_output = true; |
d7065adb | 419 | else if (!stat(output_name, &st) && st.st_size) { |
d20deb64 | 420 | if (rec->write_mode == WRITE_FORCE) { |
d7065adb FBH |
421 | char oldname[PATH_MAX]; |
422 | snprintf(oldname, sizeof(oldname), "%s.old", | |
423 | output_name); | |
424 | unlink(oldname); | |
425 | rename(output_name, oldname); | |
426 | } | |
d20deb64 ACM |
427 | } else if (rec->write_mode == WRITE_APPEND) { |
428 | rec->write_mode = WRITE_FORCE; | |
266e0e21 | 429 | } |
97124d5e PZ |
430 | } |
431 | ||
f887f301 | 432 | flags = O_CREAT|O_RDWR; |
d20deb64 ACM |
433 | if (rec->write_mode == WRITE_APPEND) |
434 | rec->file_new = 0; | |
abaff32a IM |
435 | else |
436 | flags |= O_TRUNC; | |
437 | ||
d20deb64 | 438 | if (opts->pipe_output) |
529870e3 TZ |
439 | output = STDOUT_FILENO; |
440 | else | |
441 | output = open(output_name, flags, S_IRUSR | S_IWUSR); | |
de9ac07b PZ |
442 | if (output < 0) { |
443 | perror("failed to create output file"); | |
8d3eca20 | 444 | return -1; |
de9ac07b PZ |
445 | } |
446 | ||
d20deb64 ACM |
447 | rec->output = output; |
448 | ||
7865e817 | 449 | session = perf_session__new(output_name, O_WRONLY, |
d20deb64 | 450 | rec->write_mode == WRITE_FORCE, false, NULL); |
94c744b6 | 451 | if (session == NULL) { |
a9a70bbc ACM |
452 | pr_err("Not enough memory for reading perf file header\n"); |
453 | return -1; | |
454 | } | |
455 | ||
d20deb64 ACM |
456 | rec->session = session; |
457 | ||
781ba9d2 RR |
458 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) |
459 | perf_header__set_feat(&session->header, feat); | |
460 | ||
461 | if (rec->no_buildid) | |
462 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); | |
463 | ||
464 | if (!have_tracepoints(&evsel_list->entries)) | |
2eeaaa09 | 465 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
baa2f6ce | 466 | |
330aa675 SE |
467 | if (!rec->opts.branch_stack) |
468 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); | |
469 | ||
d20deb64 | 470 | if (!rec->file_new) { |
a91e5431 | 471 | err = perf_session__read_header(session, output); |
4dc0a04b | 472 | if (err < 0) |
39d17dac | 473 | goto out_delete_session; |
4dc0a04b ACM |
474 | } |
475 | ||
d4db3f16 | 476 | if (forks) { |
d20deb64 | 477 | err = perf_evlist__prepare_workload(evsel_list, opts, argv); |
35b9d88e ACM |
478 | if (err < 0) { |
479 | pr_err("Couldn't run the workload!\n"); | |
480 | goto out_delete_session; | |
856e9660 | 481 | } |
856e9660 PZ |
482 | } |
483 | ||
8d3eca20 DA |
484 | if (perf_record__open(rec) != 0) { |
485 | err = -1; | |
486 | goto out_delete_session; | |
487 | } | |
de9ac07b | 488 | |
a8bb559b NK |
489 | if (!evsel_list->nr_groups) |
490 | perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); | |
491 | ||
712a4b60 | 492 | /* |
d20deb64 | 493 | * perf_session__delete(session) will be called at perf_record__exit() |
712a4b60 | 494 | */ |
d20deb64 | 495 | on_exit(perf_record__exit, rec); |
712a4b60 | 496 | |
d20deb64 | 497 | if (opts->pipe_output) { |
529870e3 TZ |
498 | err = perf_header__write_pipe(output); |
499 | if (err < 0) | |
8d3eca20 | 500 | goto out_delete_session; |
d20deb64 | 501 | } else if (rec->file_new) { |
a91e5431 ACM |
502 | err = perf_session__write_header(session, evsel_list, |
503 | output, false); | |
d5eed904 | 504 | if (err < 0) |
8d3eca20 | 505 | goto out_delete_session; |
56b03f3c ACM |
506 | } |
507 | ||
d3665498 | 508 | if (!rec->no_buildid |
e20960c0 | 509 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
d3665498 | 510 | pr_err("Couldn't generate buildids. " |
e20960c0 | 511 | "Use --no-buildid to profile anyway.\n"); |
8d3eca20 DA |
512 | err = -1; |
513 | goto out_delete_session; | |
e20960c0 RR |
514 | } |
515 | ||
d20deb64 | 516 | rec->post_processing_offset = lseek(output, 0, SEEK_CUR); |
6122e4e4 | 517 | |
34ba5122 | 518 | machine = &session->machines.host; |
743eb868 | 519 | |
d20deb64 | 520 | if (opts->pipe_output) { |
45694aa7 | 521 | err = perf_event__synthesize_attrs(tool, session, |
d20deb64 | 522 | process_synthesized_event); |
2c46dbb5 TZ |
523 | if (err < 0) { |
524 | pr_err("Couldn't synthesize attrs.\n"); | |
8d3eca20 | 525 | goto out_delete_session; |
2c46dbb5 | 526 | } |
cd19a035 | 527 | |
45694aa7 | 528 | err = perf_event__synthesize_event_types(tool, process_synthesized_event, |
743eb868 | 529 | machine); |
cd19a035 TZ |
530 | if (err < 0) { |
531 | pr_err("Couldn't synthesize event_types.\n"); | |
8d3eca20 | 532 | goto out_delete_session; |
cd19a035 | 533 | } |
9215545e | 534 | |
361c99a6 | 535 | if (have_tracepoints(&evsel_list->entries)) { |
63e0c771 TZ |
536 | /* |
537 | * FIXME err <= 0 here actually means that | |
538 | * there were no tracepoints so its not really | |
539 | * an error, just that we don't need to | |
540 | * synthesize anything. We really have to | |
541 | * return this more properly and also | |
542 | * propagate errors that now are calling die() | |
543 | */ | |
45694aa7 | 544 | err = perf_event__synthesize_tracing_data(tool, output, evsel_list, |
743eb868 | 545 | process_synthesized_event); |
63e0c771 TZ |
546 | if (err <= 0) { |
547 | pr_err("Couldn't record tracing data.\n"); | |
8d3eca20 | 548 | goto out_delete_session; |
63e0c771 | 549 | } |
d20deb64 | 550 | advance_output(rec, err); |
63e0c771 | 551 | } |
2c46dbb5 TZ |
552 | } |
553 | ||
45694aa7 | 554 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
743eb868 | 555 | machine, "_text"); |
70162138 | 556 | if (err < 0) |
45694aa7 | 557 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
743eb868 | 558 | machine, "_stext"); |
c1a3a4b9 ACM |
559 | if (err < 0) |
560 | pr_err("Couldn't record kernel reference relocation symbol\n" | |
561 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
562 | "Check /proc/kallsyms permission or run as root.\n"); | |
b7cece76 | 563 | |
45694aa7 | 564 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 565 | machine); |
c1a3a4b9 ACM |
566 | if (err < 0) |
567 | pr_err("Couldn't record kernel module information.\n" | |
568 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
569 | "Check /proc/modules permission or run as root.\n"); | |
570 | ||
7e383de4 | 571 | if (perf_guest) { |
876650e6 ACM |
572 | machines__process_guests(&session->machines, |
573 | perf_event__synthesize_guest_os, tool); | |
7e383de4 | 574 | } |
7c6a1c65 | 575 | |
e4dd45fe | 576 | if (perf_target__has_task(&opts->target)) |
8d3eca20 | 577 | err = perf_event__synthesize_thread_map(tool, evsel_list->threads, |
7c940c18 | 578 | process_synthesized_event, |
743eb868 | 579 | machine); |
e4dd45fe | 580 | else if (perf_target__has_cpu(&opts->target)) |
8d3eca20 | 581 | err = perf_event__synthesize_threads(tool, process_synthesized_event, |
743eb868 | 582 | machine); |
e4dd45fe JO |
583 | else /* command specified */ |
584 | err = 0; | |
7c6a1c65 | 585 | |
8d3eca20 DA |
586 | if (err != 0) |
587 | goto out_delete_session; | |
588 | ||
d20deb64 | 589 | if (rec->realtime_prio) { |
de9ac07b PZ |
590 | struct sched_param param; |
591 | ||
d20deb64 | 592 | param.sched_priority = rec->realtime_prio; |
de9ac07b | 593 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
6beba7ad | 594 | pr_err("Could not set realtime priority.\n"); |
8d3eca20 DA |
595 | err = -1; |
596 | goto out_delete_session; | |
de9ac07b PZ |
597 | } |
598 | } | |
599 | ||
774cb499 JO |
600 | /* |
601 | * When perf is starting the traced process, all the events | |
602 | * (apart from group members) have enable_on_exec=1 set, | |
603 | * so don't spoil it by prematurely enabling them. | |
604 | */ | |
605 | if (!perf_target__none(&opts->target)) | |
606 | perf_evlist__enable(evsel_list); | |
764e16a3 | 607 | |
856e9660 PZ |
608 | /* |
609 | * Let the child rip | |
610 | */ | |
d4db3f16 | 611 | if (forks) |
35b9d88e | 612 | perf_evlist__start_workload(evsel_list); |
856e9660 | 613 | |
649c48a9 | 614 | for (;;) { |
d20deb64 | 615 | int hits = rec->samples; |
de9ac07b | 616 | |
8d3eca20 DA |
617 | if (perf_record__mmap_read_all(rec) < 0) { |
618 | err = -1; | |
619 | goto out_delete_session; | |
620 | } | |
de9ac07b | 621 | |
d20deb64 | 622 | if (hits == rec->samples) { |
649c48a9 PZ |
623 | if (done) |
624 | break; | |
5c581041 | 625 | err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1); |
8b412664 PZ |
626 | waking++; |
627 | } | |
628 | ||
774cb499 JO |
629 | /* |
630 | * When perf is starting the traced process, at the end events | |
631 | * die with the process and we wait for that. Thus no need to | |
632 | * disable events in this case. | |
633 | */ | |
2711926a | 634 | if (done && !disabled && !perf_target__none(&opts->target)) { |
4152ab37 | 635 | perf_evlist__disable(evsel_list); |
2711926a JO |
636 | disabled = true; |
637 | } | |
de9ac07b PZ |
638 | } |
639 | ||
18483b81 | 640 | if (quiet || signr == SIGUSR1) |
b44308f5 ACM |
641 | return 0; |
642 | ||
8b412664 PZ |
643 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
644 | ||
021e9f47 IM |
645 | /* |
646 | * Approximate RIP event size: 24 bytes. | |
647 | */ | |
648 | fprintf(stderr, | |
9486aa38 | 649 | "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n", |
d20deb64 | 650 | (double)rec->bytes_written / 1024.0 / 1024.0, |
021e9f47 | 651 | output_name, |
d20deb64 | 652 | rec->bytes_written / 24); |
addc2785 | 653 | |
de9ac07b | 654 | return 0; |
39d17dac ACM |
655 | |
656 | out_delete_session: | |
657 | perf_session__delete(session); | |
658 | return err; | |
de9ac07b | 659 | } |
0e9b20b8 | 660 | |
bdfebd84 RAV |
661 | #define BRANCH_OPT(n, m) \ |
662 | { .name = n, .mode = (m) } | |
663 | ||
664 | #define BRANCH_END { .name = NULL } | |
665 | ||
666 | struct branch_mode { | |
667 | const char *name; | |
668 | int mode; | |
669 | }; | |
670 | ||
671 | static const struct branch_mode branch_modes[] = { | |
672 | BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER), | |
673 | BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL), | |
674 | BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV), | |
675 | BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY), | |
676 | BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL), | |
677 | BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN), | |
678 | BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL), | |
679 | BRANCH_END | |
680 | }; | |
681 | ||
682 | static int | |
a5aabdac | 683 | parse_branch_stack(const struct option *opt, const char *str, int unset) |
bdfebd84 RAV |
684 | { |
685 | #define ONLY_PLM \ | |
686 | (PERF_SAMPLE_BRANCH_USER |\ | |
687 | PERF_SAMPLE_BRANCH_KERNEL |\ | |
688 | PERF_SAMPLE_BRANCH_HV) | |
689 | ||
690 | uint64_t *mode = (uint64_t *)opt->value; | |
691 | const struct branch_mode *br; | |
a5aabdac | 692 | char *s, *os = NULL, *p; |
bdfebd84 RAV |
693 | int ret = -1; |
694 | ||
a5aabdac SE |
695 | if (unset) |
696 | return 0; | |
bdfebd84 | 697 | |
a5aabdac SE |
698 | /* |
699 | * cannot set it twice, -b + --branch-filter for instance | |
700 | */ | |
701 | if (*mode) | |
bdfebd84 RAV |
702 | return -1; |
703 | ||
a5aabdac SE |
704 | /* str may be NULL in case no arg is passed to -b */ |
705 | if (str) { | |
706 | /* because str is read-only */ | |
707 | s = os = strdup(str); | |
708 | if (!s) | |
709 | return -1; | |
710 | ||
711 | for (;;) { | |
712 | p = strchr(s, ','); | |
713 | if (p) | |
714 | *p = '\0'; | |
715 | ||
716 | for (br = branch_modes; br->name; br++) { | |
717 | if (!strcasecmp(s, br->name)) | |
718 | break; | |
719 | } | |
720 | if (!br->name) { | |
721 | ui__warning("unknown branch filter %s," | |
722 | " check man page\n", s); | |
723 | goto error; | |
724 | } | |
bdfebd84 | 725 | |
a5aabdac | 726 | *mode |= br->mode; |
bdfebd84 | 727 | |
a5aabdac SE |
728 | if (!p) |
729 | break; | |
bdfebd84 | 730 | |
a5aabdac SE |
731 | s = p + 1; |
732 | } | |
bdfebd84 RAV |
733 | } |
734 | ret = 0; | |
735 | ||
a5aabdac | 736 | /* default to any branch */ |
bdfebd84 | 737 | if ((*mode & ~ONLY_PLM) == 0) { |
a5aabdac | 738 | *mode = PERF_SAMPLE_BRANCH_ANY; |
bdfebd84 RAV |
739 | } |
740 | error: | |
741 | free(os); | |
742 | return ret; | |
743 | } | |
744 | ||
95485b1c | 745 | #ifdef LIBUNWIND_SUPPORT |
26d33022 JO |
746 | static int get_stack_size(char *str, unsigned long *_size) |
747 | { | |
748 | char *endptr; | |
749 | unsigned long size; | |
750 | unsigned long max_size = round_down(USHRT_MAX, sizeof(u64)); | |
751 | ||
752 | size = strtoul(str, &endptr, 0); | |
753 | ||
754 | do { | |
755 | if (*endptr) | |
756 | break; | |
757 | ||
758 | size = round_up(size, sizeof(u64)); | |
759 | if (!size || size > max_size) | |
760 | break; | |
761 | ||
762 | *_size = size; | |
763 | return 0; | |
764 | ||
765 | } while (0); | |
766 | ||
767 | pr_err("callchain: Incorrect stack dump size (max %ld): %s\n", | |
768 | max_size, str); | |
769 | return -1; | |
770 | } | |
95485b1c | 771 | #endif /* LIBUNWIND_SUPPORT */ |
26d33022 | 772 | |
75d9a108 ACM |
773 | int record_parse_callchain_opt(const struct option *opt, |
774 | const char *arg, int unset) | |
26d33022 | 775 | { |
c5ff78c3 | 776 | struct perf_record_opts *opts = opt->value; |
26d33022 JO |
777 | char *tok, *name, *saveptr = NULL; |
778 | char *buf; | |
779 | int ret = -1; | |
780 | ||
781 | /* --no-call-graph */ | |
782 | if (unset) | |
783 | return 0; | |
784 | ||
785 | /* We specified default option if none is provided. */ | |
786 | BUG_ON(!arg); | |
787 | ||
788 | /* We need buffer that we know we can write to. */ | |
789 | buf = malloc(strlen(arg) + 1); | |
790 | if (!buf) | |
791 | return -ENOMEM; | |
792 | ||
793 | strcpy(buf, arg); | |
794 | ||
795 | tok = strtok_r((char *)buf, ",", &saveptr); | |
796 | name = tok ? : (char *)buf; | |
797 | ||
798 | do { | |
799 | /* Framepointer style */ | |
800 | if (!strncmp(name, "fp", sizeof("fp"))) { | |
801 | if (!strtok_r(NULL, ",", &saveptr)) { | |
c5ff78c3 | 802 | opts->call_graph = CALLCHAIN_FP; |
26d33022 JO |
803 | ret = 0; |
804 | } else | |
805 | pr_err("callchain: No more arguments " | |
806 | "needed for -g fp\n"); | |
807 | break; | |
808 | ||
95485b1c | 809 | #ifdef LIBUNWIND_SUPPORT |
26d33022 JO |
810 | /* Dwarf style */ |
811 | } else if (!strncmp(name, "dwarf", sizeof("dwarf"))) { | |
61eaa3be ACM |
812 | const unsigned long default_stack_dump_size = 8192; |
813 | ||
26d33022 | 814 | ret = 0; |
c5ff78c3 ACM |
815 | opts->call_graph = CALLCHAIN_DWARF; |
816 | opts->stack_dump_size = default_stack_dump_size; | |
26d33022 JO |
817 | |
818 | tok = strtok_r(NULL, ",", &saveptr); | |
819 | if (tok) { | |
820 | unsigned long size = 0; | |
821 | ||
822 | ret = get_stack_size(tok, &size); | |
c5ff78c3 | 823 | opts->stack_dump_size = size; |
26d33022 JO |
824 | } |
825 | ||
826 | if (!ret) | |
827 | pr_debug("callchain: stack dump size %d\n", | |
c5ff78c3 | 828 | opts->stack_dump_size); |
95485b1c | 829 | #endif /* LIBUNWIND_SUPPORT */ |
26d33022 JO |
830 | } else { |
831 | pr_err("callchain: Unknown -g option " | |
832 | "value: %s\n", arg); | |
833 | break; | |
834 | } | |
835 | ||
836 | } while (0); | |
837 | ||
838 | free(buf); | |
839 | ||
840 | if (!ret) | |
c5ff78c3 | 841 | pr_debug("callchain: type %d\n", opts->call_graph); |
26d33022 JO |
842 | |
843 | return ret; | |
844 | } | |
845 | ||
0e9b20b8 | 846 | static const char * const record_usage[] = { |
9e096753 MG |
847 | "perf record [<options>] [<command>]", |
848 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
849 | NULL |
850 | }; | |
851 | ||
d20deb64 ACM |
852 | /* |
853 | * XXX Ideally would be local to cmd_record() and passed to a perf_record__new | |
854 | * because we need to have access to it in perf_record__exit, that is called | |
855 | * after cmd_record() exits, but since record_options need to be accessible to | |
856 | * builtin-script, leave it here. | |
857 | * | |
858 | * At least we don't ouch it in all the other functions here directly. | |
859 | * | |
860 | * Just say no to tons of global variables, sigh. | |
861 | */ | |
862 | static struct perf_record record = { | |
863 | .opts = { | |
d20deb64 ACM |
864 | .mmap_pages = UINT_MAX, |
865 | .user_freq = UINT_MAX, | |
866 | .user_interval = ULLONG_MAX, | |
447a6013 | 867 | .freq = 4000, |
d1cb9fce NK |
868 | .target = { |
869 | .uses_mmap = true, | |
870 | }, | |
d20deb64 ACM |
871 | }, |
872 | .write_mode = WRITE_FORCE, | |
873 | .file_new = true, | |
874 | }; | |
7865e817 | 875 | |
61eaa3be ACM |
876 | #define CALLCHAIN_HELP "do call-graph (stack chain/backtrace) recording: " |
877 | ||
878 | #ifdef LIBUNWIND_SUPPORT | |
75d9a108 | 879 | const char record_callchain_help[] = CALLCHAIN_HELP "[fp] dwarf"; |
61eaa3be | 880 | #else |
75d9a108 | 881 | const char record_callchain_help[] = CALLCHAIN_HELP "[fp]"; |
61eaa3be ACM |
882 | #endif |
883 | ||
d20deb64 ACM |
884 | /* |
885 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
886 | * with it and switch to use the library functions in perf_evlist that came | |
887 | * from builtin-record.c, i.e. use perf_record_opts, | |
888 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', | |
889 | * using pipes, etc. | |
890 | */ | |
bca647aa | 891 | const struct option record_options[] = { |
d20deb64 | 892 | OPT_CALLBACK('e', "event", &record.evlist, "event", |
86847b62 | 893 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 894 | parse_events_option), |
d20deb64 | 895 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
c171b552 | 896 | "event filter", parse_filter), |
bea03405 | 897 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", |
d6d901c2 | 898 | "record events on existing process id"), |
bea03405 | 899 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", |
d6d901c2 | 900 | "record events on existing thread id"), |
d20deb64 | 901 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
0e9b20b8 | 902 | "collect data with this RT SCHED_FIFO priority"), |
d20deb64 | 903 | OPT_BOOLEAN('D', "no-delay", &record.opts.no_delay, |
acac03fa | 904 | "collect data without buffering"), |
d20deb64 | 905 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
daac07b2 | 906 | "collect raw sample records from all opened counters"), |
bea03405 | 907 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, |
0e9b20b8 | 908 | "system-wide collection from all CPUs"), |
d20deb64 | 909 | OPT_BOOLEAN('A', "append", &record.append_file, |
abaff32a | 910 | "append to the output file to do incremental profiling"), |
bea03405 | 911 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", |
c45c6ea2 | 912 | "list of cpus to monitor"), |
d20deb64 | 913 | OPT_BOOLEAN('f', "force", &record.force, |
7865e817 | 914 | "overwrite existing data file (deprecated)"), |
d20deb64 ACM |
915 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
916 | OPT_STRING('o', "output", &record.output_name, "file", | |
abaff32a | 917 | "output file name"), |
d20deb64 | 918 | OPT_BOOLEAN('i', "no-inherit", &record.opts.no_inherit, |
2e6cdf99 | 919 | "child tasks do not inherit counters"), |
d20deb64 ACM |
920 | OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"), |
921 | OPT_UINTEGER('m', "mmap-pages", &record.opts.mmap_pages, | |
01c2d99b | 922 | "number of mmap data pages"), |
d20deb64 | 923 | OPT_BOOLEAN(0, "group", &record.opts.group, |
43bece79 | 924 | "put the counters into a counter group"), |
c5ff78c3 | 925 | OPT_CALLBACK_DEFAULT('g', "call-graph", &record.opts, |
75d9a108 ACM |
926 | "mode[,dump_size]", record_callchain_help, |
927 | &record_parse_callchain_opt, "fp"), | |
c0555642 | 928 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 929 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 930 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
d20deb64 | 931 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
649c48a9 | 932 | "per thread counts"), |
d20deb64 | 933 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, |
4bba828d | 934 | "Sample addresses"), |
d20deb64 | 935 | OPT_BOOLEAN('T', "timestamp", &record.opts.sample_time, "Sample timestamps"), |
3e76ac78 | 936 | OPT_BOOLEAN('P', "period", &record.opts.period, "Sample period"), |
d20deb64 | 937 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, |
649c48a9 | 938 | "don't sample"), |
d20deb64 | 939 | OPT_BOOLEAN('N', "no-buildid-cache", &record.no_buildid_cache, |
a1ac1d3c | 940 | "do not update the buildid cache"), |
d20deb64 | 941 | OPT_BOOLEAN('B', "no-buildid", &record.no_buildid, |
baa2f6ce | 942 | "do not collect buildids in perf.data"), |
d20deb64 | 943 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
023695d9 SE |
944 | "monitor event in cgroup name only", |
945 | parse_cgroups), | |
bea03405 NK |
946 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", |
947 | "user to profile"), | |
a5aabdac SE |
948 | |
949 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, | |
950 | "branch any", "sample any taken branches", | |
951 | parse_branch_stack), | |
952 | ||
953 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, | |
954 | "branch filter mask", "branch stack filter modes", | |
bdfebd84 | 955 | parse_branch_stack), |
0e9b20b8 IM |
956 | OPT_END() |
957 | }; | |
958 | ||
1d037ca1 | 959 | int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused) |
0e9b20b8 | 960 | { |
69aad6f1 ACM |
961 | int err = -ENOMEM; |
962 | struct perf_evsel *pos; | |
d20deb64 ACM |
963 | struct perf_evlist *evsel_list; |
964 | struct perf_record *rec = &record; | |
16ad2ffb | 965 | char errbuf[BUFSIZ]; |
0e9b20b8 | 966 | |
7e2ed097 | 967 | evsel_list = perf_evlist__new(NULL, NULL); |
361c99a6 ACM |
968 | if (evsel_list == NULL) |
969 | return -ENOMEM; | |
970 | ||
d20deb64 ACM |
971 | rec->evlist = evsel_list; |
972 | ||
bca647aa | 973 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 974 | PARSE_OPT_STOP_AT_NON_OPTION); |
d67356e7 | 975 | if (!argc && perf_target__none(&rec->opts.target)) |
bca647aa | 976 | usage_with_options(record_usage, record_options); |
0e9b20b8 | 977 | |
d20deb64 | 978 | if (rec->force && rec->append_file) { |
3780f488 NK |
979 | ui__error("Can't overwrite and append at the same time." |
980 | " You need to choose between -f and -A"); | |
bca647aa | 981 | usage_with_options(record_usage, record_options); |
d20deb64 ACM |
982 | } else if (rec->append_file) { |
983 | rec->write_mode = WRITE_APPEND; | |
7865e817 | 984 | } else { |
d20deb64 | 985 | rec->write_mode = WRITE_FORCE; |
7865e817 FW |
986 | } |
987 | ||
bea03405 | 988 | if (nr_cgroups && !rec->opts.target.system_wide) { |
3780f488 NK |
989 | ui__error("cgroup monitoring only available in" |
990 | " system-wide mode\n"); | |
023695d9 SE |
991 | usage_with_options(record_usage, record_options); |
992 | } | |
993 | ||
655000e7 | 994 | symbol__init(); |
baa2f6ce | 995 | |
ec80fde7 | 996 | if (symbol_conf.kptr_restrict) |
646aaea6 ACM |
997 | pr_warning( |
998 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
999 | "check /proc/sys/kernel/kptr_restrict.\n\n" | |
1000 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
1001 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
1002 | "Samples in kernel modules won't be resolved at all.\n\n" | |
1003 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
1004 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
ec80fde7 | 1005 | |
d20deb64 | 1006 | if (rec->no_buildid_cache || rec->no_buildid) |
a1ac1d3c | 1007 | disable_buildid_cache(); |
655000e7 | 1008 | |
361c99a6 ACM |
1009 | if (evsel_list->nr_entries == 0 && |
1010 | perf_evlist__add_default(evsel_list) < 0) { | |
69aad6f1 ACM |
1011 | pr_err("Not enough memory for event selector list\n"); |
1012 | goto out_symbol_exit; | |
bbd36e5e | 1013 | } |
0e9b20b8 | 1014 | |
16ad2ffb NK |
1015 | err = perf_target__validate(&rec->opts.target); |
1016 | if (err) { | |
1017 | perf_target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); | |
1018 | ui__warning("%s", errbuf); | |
1019 | } | |
1020 | ||
1021 | err = perf_target__parse_uid(&rec->opts.target); | |
1022 | if (err) { | |
1023 | int saved_errno = errno; | |
4bd0f2d2 | 1024 | |
16ad2ffb | 1025 | perf_target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
3780f488 | 1026 | ui__error("%s", errbuf); |
16ad2ffb NK |
1027 | |
1028 | err = -saved_errno; | |
0d37aa34 | 1029 | goto out_free_fd; |
16ad2ffb | 1030 | } |
0d37aa34 | 1031 | |
16ad2ffb | 1032 | err = -ENOMEM; |
b809ac10 | 1033 | if (perf_evlist__create_maps(evsel_list, &rec->opts.target) < 0) |
dd7927f4 | 1034 | usage_with_options(record_usage, record_options); |
69aad6f1 | 1035 | |
361c99a6 | 1036 | list_for_each_entry(pos, &evsel_list->entries, node) { |
7289f83c | 1037 | if (perf_header__push_event(pos->attr.config, perf_evsel__name(pos))) |
ad7f4e3f | 1038 | goto out_free_fd; |
d6d901c2 | 1039 | } |
5c581041 | 1040 | |
d20deb64 ACM |
1041 | if (rec->opts.user_interval != ULLONG_MAX) |
1042 | rec->opts.default_interval = rec->opts.user_interval; | |
1043 | if (rec->opts.user_freq != UINT_MAX) | |
1044 | rec->opts.freq = rec->opts.user_freq; | |
f9212819 | 1045 | |
7e4ff9e3 MG |
1046 | /* |
1047 | * User specified count overrides default frequency. | |
1048 | */ | |
d20deb64 ACM |
1049 | if (rec->opts.default_interval) |
1050 | rec->opts.freq = 0; | |
1051 | else if (rec->opts.freq) { | |
1052 | rec->opts.default_interval = rec->opts.freq; | |
7e4ff9e3 | 1053 | } else { |
3780f488 | 1054 | ui__error("frequency and count are zero, aborting\n"); |
39d17dac | 1055 | err = -EINVAL; |
5c581041 | 1056 | goto out_free_fd; |
7e4ff9e3 MG |
1057 | } |
1058 | ||
d20deb64 | 1059 | err = __cmd_record(&record, argc, argv); |
39d17dac | 1060 | out_free_fd: |
7e2ed097 | 1061 | perf_evlist__delete_maps(evsel_list); |
d65a458b ACM |
1062 | out_symbol_exit: |
1063 | symbol__exit(); | |
39d17dac | 1064 | return err; |
0e9b20b8 | 1065 | } |