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btrfs: don't try to notify udev about missing devices
[deliverable/linux.git] / tools / perf / builtin-script.c
1 #include "builtin.h"
2
3 #include "perf.h"
4 #include "util/cache.h"
5 #include "util/debug.h"
6 #include "util/exec_cmd.h"
7 #include "util/header.h"
8 #include "util/parse-options.h"
9 #include "util/session.h"
10 #include "util/tool.h"
11 #include "util/symbol.h"
12 #include "util/thread.h"
13 #include "util/trace-event.h"
14 #include "util/util.h"
15 #include "util/evlist.h"
16 #include "util/evsel.h"
17 #include "util/sort.h"
18 #include <linux/bitmap.h>
19
20 static char const *script_name;
21 static char const *generate_script_lang;
22 static bool debug_mode;
23 static u64 last_timestamp;
24 static u64 nr_unordered;
25 extern const struct option record_options[];
26 static bool no_callchain;
27 static bool system_wide;
28 static const char *cpu_list;
29 static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
30
31 enum perf_output_field {
32 PERF_OUTPUT_COMM = 1U << 0,
33 PERF_OUTPUT_TID = 1U << 1,
34 PERF_OUTPUT_PID = 1U << 2,
35 PERF_OUTPUT_TIME = 1U << 3,
36 PERF_OUTPUT_CPU = 1U << 4,
37 PERF_OUTPUT_EVNAME = 1U << 5,
38 PERF_OUTPUT_TRACE = 1U << 6,
39 PERF_OUTPUT_IP = 1U << 7,
40 PERF_OUTPUT_SYM = 1U << 8,
41 PERF_OUTPUT_DSO = 1U << 9,
42 PERF_OUTPUT_ADDR = 1U << 10,
43 PERF_OUTPUT_SYMOFFSET = 1U << 11,
44 };
45
46 struct output_option {
47 const char *str;
48 enum perf_output_field field;
49 } all_output_options[] = {
50 {.str = "comm", .field = PERF_OUTPUT_COMM},
51 {.str = "tid", .field = PERF_OUTPUT_TID},
52 {.str = "pid", .field = PERF_OUTPUT_PID},
53 {.str = "time", .field = PERF_OUTPUT_TIME},
54 {.str = "cpu", .field = PERF_OUTPUT_CPU},
55 {.str = "event", .field = PERF_OUTPUT_EVNAME},
56 {.str = "trace", .field = PERF_OUTPUT_TRACE},
57 {.str = "ip", .field = PERF_OUTPUT_IP},
58 {.str = "sym", .field = PERF_OUTPUT_SYM},
59 {.str = "dso", .field = PERF_OUTPUT_DSO},
60 {.str = "addr", .field = PERF_OUTPUT_ADDR},
61 {.str = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
62 };
63
64 /* default set to maintain compatibility with current format */
65 static struct {
66 bool user_set;
67 bool wildcard_set;
68 u64 fields;
69 u64 invalid_fields;
70 } output[PERF_TYPE_MAX] = {
71
72 [PERF_TYPE_HARDWARE] = {
73 .user_set = false,
74
75 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
76 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
77 PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
78 PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
79
80 .invalid_fields = PERF_OUTPUT_TRACE,
81 },
82
83 [PERF_TYPE_SOFTWARE] = {
84 .user_set = false,
85
86 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
87 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
88 PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
89 PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
90
91 .invalid_fields = PERF_OUTPUT_TRACE,
92 },
93
94 [PERF_TYPE_TRACEPOINT] = {
95 .user_set = false,
96
97 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
98 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
99 PERF_OUTPUT_EVNAME | PERF_OUTPUT_TRACE,
100 },
101
102 [PERF_TYPE_RAW] = {
103 .user_set = false,
104
105 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
106 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
107 PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
108 PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
109
110 .invalid_fields = PERF_OUTPUT_TRACE,
111 },
112 };
113
114 static bool output_set_by_user(void)
115 {
116 int j;
117 for (j = 0; j < PERF_TYPE_MAX; ++j) {
118 if (output[j].user_set)
119 return true;
120 }
121 return false;
122 }
123
124 static const char *output_field2str(enum perf_output_field field)
125 {
126 int i, imax = ARRAY_SIZE(all_output_options);
127 const char *str = "";
128
129 for (i = 0; i < imax; ++i) {
130 if (all_output_options[i].field == field) {
131 str = all_output_options[i].str;
132 break;
133 }
134 }
135 return str;
136 }
137
138 #define PRINT_FIELD(x) (output[attr->type].fields & PERF_OUTPUT_##x)
139
140 static int perf_evsel__check_stype(struct perf_evsel *evsel,
141 u64 sample_type, const char *sample_msg,
142 enum perf_output_field field)
143 {
144 struct perf_event_attr *attr = &evsel->attr;
145 int type = attr->type;
146 const char *evname;
147
148 if (attr->sample_type & sample_type)
149 return 0;
150
151 if (output[type].user_set) {
152 evname = perf_evsel__name(evsel);
153 pr_err("Samples for '%s' event do not have %s attribute set. "
154 "Cannot print '%s' field.\n",
155 evname, sample_msg, output_field2str(field));
156 return -1;
157 }
158
159 /* user did not ask for it explicitly so remove from the default list */
160 output[type].fields &= ~field;
161 evname = perf_evsel__name(evsel);
162 pr_debug("Samples for '%s' event do not have %s attribute set. "
163 "Skipping '%s' field.\n",
164 evname, sample_msg, output_field2str(field));
165
166 return 0;
167 }
168
169 static int perf_evsel__check_attr(struct perf_evsel *evsel,
170 struct perf_session *session)
171 {
172 struct perf_event_attr *attr = &evsel->attr;
173
174 if (PRINT_FIELD(TRACE) &&
175 !perf_session__has_traces(session, "record -R"))
176 return -EINVAL;
177
178 if (PRINT_FIELD(IP)) {
179 if (perf_evsel__check_stype(evsel, PERF_SAMPLE_IP, "IP",
180 PERF_OUTPUT_IP))
181 return -EINVAL;
182
183 if (!no_callchain &&
184 !(attr->sample_type & PERF_SAMPLE_CALLCHAIN))
185 symbol_conf.use_callchain = false;
186 }
187
188 if (PRINT_FIELD(ADDR) &&
189 perf_evsel__check_stype(evsel, PERF_SAMPLE_ADDR, "ADDR",
190 PERF_OUTPUT_ADDR))
191 return -EINVAL;
192
193 if (PRINT_FIELD(SYM) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
194 pr_err("Display of symbols requested but neither sample IP nor "
195 "sample address\nis selected. Hence, no addresses to convert "
196 "to symbols.\n");
197 return -EINVAL;
198 }
199 if (PRINT_FIELD(SYMOFFSET) && !PRINT_FIELD(SYM)) {
200 pr_err("Display of offsets requested but symbol is not"
201 "selected.\n");
202 return -EINVAL;
203 }
204 if (PRINT_FIELD(DSO) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
205 pr_err("Display of DSO requested but neither sample IP nor "
206 "sample address\nis selected. Hence, no addresses to convert "
207 "to DSO.\n");
208 return -EINVAL;
209 }
210
211 if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
212 perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID",
213 PERF_OUTPUT_TID|PERF_OUTPUT_PID))
214 return -EINVAL;
215
216 if (PRINT_FIELD(TIME) &&
217 perf_evsel__check_stype(evsel, PERF_SAMPLE_TIME, "TIME",
218 PERF_OUTPUT_TIME))
219 return -EINVAL;
220
221 if (PRINT_FIELD(CPU) &&
222 perf_evsel__check_stype(evsel, PERF_SAMPLE_CPU, "CPU",
223 PERF_OUTPUT_CPU))
224 return -EINVAL;
225
226 return 0;
227 }
228
229 /*
230 * verify all user requested events exist and the samples
231 * have the expected data
232 */
233 static int perf_session__check_output_opt(struct perf_session *session)
234 {
235 int j;
236 struct perf_evsel *evsel;
237
238 for (j = 0; j < PERF_TYPE_MAX; ++j) {
239 evsel = perf_session__find_first_evtype(session, j);
240
241 /*
242 * even if fields is set to 0 (ie., show nothing) event must
243 * exist if user explicitly includes it on the command line
244 */
245 if (!evsel && output[j].user_set && !output[j].wildcard_set) {
246 pr_err("%s events do not exist. "
247 "Remove corresponding -f option to proceed.\n",
248 event_type(j));
249 return -1;
250 }
251
252 if (evsel && output[j].fields &&
253 perf_evsel__check_attr(evsel, session))
254 return -1;
255 }
256
257 return 0;
258 }
259
260 static void print_sample_start(struct perf_sample *sample,
261 struct thread *thread,
262 struct perf_evsel *evsel)
263 {
264 struct perf_event_attr *attr = &evsel->attr;
265 const char *evname = NULL;
266 unsigned long secs;
267 unsigned long usecs;
268 unsigned long long nsecs;
269
270 if (PRINT_FIELD(COMM)) {
271 if (latency_format)
272 printf("%8.8s ", thread->comm);
273 else if (PRINT_FIELD(IP) && symbol_conf.use_callchain)
274 printf("%s ", thread->comm);
275 else
276 printf("%16s ", thread->comm);
277 }
278
279 if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
280 printf("%5d/%-5d ", sample->pid, sample->tid);
281 else if (PRINT_FIELD(PID))
282 printf("%5d ", sample->pid);
283 else if (PRINT_FIELD(TID))
284 printf("%5d ", sample->tid);
285
286 if (PRINT_FIELD(CPU)) {
287 if (latency_format)
288 printf("%3d ", sample->cpu);
289 else
290 printf("[%03d] ", sample->cpu);
291 }
292
293 if (PRINT_FIELD(TIME)) {
294 nsecs = sample->time;
295 secs = nsecs / NSECS_PER_SEC;
296 nsecs -= secs * NSECS_PER_SEC;
297 usecs = nsecs / NSECS_PER_USEC;
298 printf("%5lu.%06lu: ", secs, usecs);
299 }
300
301 if (PRINT_FIELD(EVNAME)) {
302 evname = perf_evsel__name(evsel);
303 printf("%s: ", evname ? evname : "[unknown]");
304 }
305 }
306
307 static bool is_bts_event(struct perf_event_attr *attr)
308 {
309 return ((attr->type == PERF_TYPE_HARDWARE) &&
310 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
311 (attr->sample_period == 1));
312 }
313
314 static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
315 {
316 if ((attr->type == PERF_TYPE_SOFTWARE) &&
317 ((attr->config == PERF_COUNT_SW_PAGE_FAULTS) ||
318 (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN) ||
319 (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)))
320 return true;
321
322 if (is_bts_event(attr))
323 return true;
324
325 return false;
326 }
327
328 static void print_sample_addr(union perf_event *event,
329 struct perf_sample *sample,
330 struct machine *machine,
331 struct thread *thread,
332 struct perf_event_attr *attr)
333 {
334 struct addr_location al;
335 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
336
337 printf("%16" PRIx64, sample->addr);
338
339 if (!sample_addr_correlates_sym(attr))
340 return;
341
342 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
343 sample->addr, &al);
344 if (!al.map)
345 thread__find_addr_map(thread, machine, cpumode, MAP__VARIABLE,
346 sample->addr, &al);
347
348 al.cpu = sample->cpu;
349 al.sym = NULL;
350
351 if (al.map)
352 al.sym = map__find_symbol(al.map, al.addr, NULL);
353
354 if (PRINT_FIELD(SYM)) {
355 printf(" ");
356 if (PRINT_FIELD(SYMOFFSET))
357 symbol__fprintf_symname_offs(al.sym, &al, stdout);
358 else
359 symbol__fprintf_symname(al.sym, stdout);
360 }
361
362 if (PRINT_FIELD(DSO)) {
363 printf(" (");
364 map__fprintf_dsoname(al.map, stdout);
365 printf(")");
366 }
367 }
368
369 static void print_sample_bts(union perf_event *event,
370 struct perf_sample *sample,
371 struct perf_evsel *evsel,
372 struct machine *machine,
373 struct thread *thread)
374 {
375 struct perf_event_attr *attr = &evsel->attr;
376
377 /* print branch_from information */
378 if (PRINT_FIELD(IP)) {
379 if (!symbol_conf.use_callchain)
380 printf(" ");
381 else
382 printf("\n");
383 perf_evsel__print_ip(evsel, event, sample, machine,
384 PRINT_FIELD(SYM), PRINT_FIELD(DSO),
385 PRINT_FIELD(SYMOFFSET));
386 }
387
388 printf(" => ");
389
390 /* print branch_to information */
391 if (PRINT_FIELD(ADDR))
392 print_sample_addr(event, sample, machine, thread, attr);
393
394 printf("\n");
395 }
396
397 static void process_event(union perf_event *event, struct perf_sample *sample,
398 struct perf_evsel *evsel, struct machine *machine,
399 struct addr_location *al)
400 {
401 struct perf_event_attr *attr = &evsel->attr;
402 struct thread *thread = al->thread;
403
404 if (output[attr->type].fields == 0)
405 return;
406
407 print_sample_start(sample, thread, evsel);
408
409 if (is_bts_event(attr)) {
410 print_sample_bts(event, sample, evsel, machine, thread);
411 return;
412 }
413
414 if (PRINT_FIELD(TRACE))
415 event_format__print(evsel->tp_format, sample->cpu,
416 sample->raw_data, sample->raw_size);
417 if (PRINT_FIELD(ADDR))
418 print_sample_addr(event, sample, machine, thread, attr);
419
420 if (PRINT_FIELD(IP)) {
421 if (!symbol_conf.use_callchain)
422 printf(" ");
423 else
424 printf("\n");
425 perf_evsel__print_ip(evsel, event, sample, machine,
426 PRINT_FIELD(SYM), PRINT_FIELD(DSO),
427 PRINT_FIELD(SYMOFFSET));
428 }
429
430 printf("\n");
431 }
432
433 static int default_start_script(const char *script __maybe_unused,
434 int argc __maybe_unused,
435 const char **argv __maybe_unused)
436 {
437 return 0;
438 }
439
440 static int default_stop_script(void)
441 {
442 return 0;
443 }
444
445 static int default_generate_script(struct pevent *pevent __maybe_unused,
446 const char *outfile __maybe_unused)
447 {
448 return 0;
449 }
450
451 static struct scripting_ops default_scripting_ops = {
452 .start_script = default_start_script,
453 .stop_script = default_stop_script,
454 .process_event = process_event,
455 .generate_script = default_generate_script,
456 };
457
458 static struct scripting_ops *scripting_ops;
459
460 static void setup_scripting(void)
461 {
462 setup_perl_scripting();
463 setup_python_scripting();
464
465 scripting_ops = &default_scripting_ops;
466 }
467
468 static int cleanup_scripting(void)
469 {
470 pr_debug("\nperf script stopped\n");
471
472 return scripting_ops->stop_script();
473 }
474
475 static int process_sample_event(struct perf_tool *tool __maybe_unused,
476 union perf_event *event,
477 struct perf_sample *sample,
478 struct perf_evsel *evsel,
479 struct machine *machine)
480 {
481 struct addr_location al;
482 struct thread *thread = machine__findnew_thread(machine, event->ip.tid);
483
484 if (thread == NULL) {
485 pr_debug("problem processing %d event, skipping it.\n",
486 event->header.type);
487 return -1;
488 }
489
490 if (debug_mode) {
491 if (sample->time < last_timestamp) {
492 pr_err("Samples misordered, previous: %" PRIu64
493 " this: %" PRIu64 "\n", last_timestamp,
494 sample->time);
495 nr_unordered++;
496 }
497 last_timestamp = sample->time;
498 return 0;
499 }
500
501 if (perf_event__preprocess_sample(event, machine, &al, sample, 0) < 0) {
502 pr_err("problem processing %d event, skipping it.\n",
503 event->header.type);
504 return -1;
505 }
506
507 if (al.filtered)
508 return 0;
509
510 if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
511 return 0;
512
513 scripting_ops->process_event(event, sample, evsel, machine, &al);
514
515 evsel->hists.stats.total_period += sample->period;
516 return 0;
517 }
518
519 static struct perf_tool perf_script = {
520 .sample = process_sample_event,
521 .mmap = perf_event__process_mmap,
522 .comm = perf_event__process_comm,
523 .exit = perf_event__process_task,
524 .fork = perf_event__process_task,
525 .attr = perf_event__process_attr,
526 .event_type = perf_event__process_event_type,
527 .tracing_data = perf_event__process_tracing_data,
528 .build_id = perf_event__process_build_id,
529 .ordered_samples = true,
530 .ordering_requires_timestamps = true,
531 };
532
533 extern volatile int session_done;
534
535 static void sig_handler(int sig __maybe_unused)
536 {
537 session_done = 1;
538 }
539
540 static int __cmd_script(struct perf_session *session)
541 {
542 int ret;
543
544 signal(SIGINT, sig_handler);
545
546 ret = perf_session__process_events(session, &perf_script);
547
548 if (debug_mode)
549 pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
550
551 return ret;
552 }
553
554 struct script_spec {
555 struct list_head node;
556 struct scripting_ops *ops;
557 char spec[0];
558 };
559
560 static LIST_HEAD(script_specs);
561
562 static struct script_spec *script_spec__new(const char *spec,
563 struct scripting_ops *ops)
564 {
565 struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
566
567 if (s != NULL) {
568 strcpy(s->spec, spec);
569 s->ops = ops;
570 }
571
572 return s;
573 }
574
575 static void script_spec__add(struct script_spec *s)
576 {
577 list_add_tail(&s->node, &script_specs);
578 }
579
580 static struct script_spec *script_spec__find(const char *spec)
581 {
582 struct script_spec *s;
583
584 list_for_each_entry(s, &script_specs, node)
585 if (strcasecmp(s->spec, spec) == 0)
586 return s;
587 return NULL;
588 }
589
590 static struct script_spec *script_spec__findnew(const char *spec,
591 struct scripting_ops *ops)
592 {
593 struct script_spec *s = script_spec__find(spec);
594
595 if (s)
596 return s;
597
598 s = script_spec__new(spec, ops);
599 if (!s)
600 return NULL;
601
602 script_spec__add(s);
603
604 return s;
605 }
606
607 int script_spec_register(const char *spec, struct scripting_ops *ops)
608 {
609 struct script_spec *s;
610
611 s = script_spec__find(spec);
612 if (s)
613 return -1;
614
615 s = script_spec__findnew(spec, ops);
616 if (!s)
617 return -1;
618
619 return 0;
620 }
621
622 static struct scripting_ops *script_spec__lookup(const char *spec)
623 {
624 struct script_spec *s = script_spec__find(spec);
625 if (!s)
626 return NULL;
627
628 return s->ops;
629 }
630
631 static void list_available_languages(void)
632 {
633 struct script_spec *s;
634
635 fprintf(stderr, "\n");
636 fprintf(stderr, "Scripting language extensions (used in "
637 "perf script -s [spec:]script.[spec]):\n\n");
638
639 list_for_each_entry(s, &script_specs, node)
640 fprintf(stderr, " %-42s [%s]\n", s->spec, s->ops->name);
641
642 fprintf(stderr, "\n");
643 }
644
645 static int parse_scriptname(const struct option *opt __maybe_unused,
646 const char *str, int unset __maybe_unused)
647 {
648 char spec[PATH_MAX];
649 const char *script, *ext;
650 int len;
651
652 if (strcmp(str, "lang") == 0) {
653 list_available_languages();
654 exit(0);
655 }
656
657 script = strchr(str, ':');
658 if (script) {
659 len = script - str;
660 if (len >= PATH_MAX) {
661 fprintf(stderr, "invalid language specifier");
662 return -1;
663 }
664 strncpy(spec, str, len);
665 spec[len] = '\0';
666 scripting_ops = script_spec__lookup(spec);
667 if (!scripting_ops) {
668 fprintf(stderr, "invalid language specifier");
669 return -1;
670 }
671 script++;
672 } else {
673 script = str;
674 ext = strrchr(script, '.');
675 if (!ext) {
676 fprintf(stderr, "invalid script extension");
677 return -1;
678 }
679 scripting_ops = script_spec__lookup(++ext);
680 if (!scripting_ops) {
681 fprintf(stderr, "invalid script extension");
682 return -1;
683 }
684 }
685
686 script_name = strdup(script);
687
688 return 0;
689 }
690
691 static int parse_output_fields(const struct option *opt __maybe_unused,
692 const char *arg, int unset __maybe_unused)
693 {
694 char *tok;
695 int i, imax = sizeof(all_output_options) / sizeof(struct output_option);
696 int j;
697 int rc = 0;
698 char *str = strdup(arg);
699 int type = -1;
700
701 if (!str)
702 return -ENOMEM;
703
704 /* first word can state for which event type the user is specifying
705 * the fields. If no type exists, the specified fields apply to all
706 * event types found in the file minus the invalid fields for a type.
707 */
708 tok = strchr(str, ':');
709 if (tok) {
710 *tok = '\0';
711 tok++;
712 if (!strcmp(str, "hw"))
713 type = PERF_TYPE_HARDWARE;
714 else if (!strcmp(str, "sw"))
715 type = PERF_TYPE_SOFTWARE;
716 else if (!strcmp(str, "trace"))
717 type = PERF_TYPE_TRACEPOINT;
718 else if (!strcmp(str, "raw"))
719 type = PERF_TYPE_RAW;
720 else {
721 fprintf(stderr, "Invalid event type in field string.\n");
722 rc = -EINVAL;
723 goto out;
724 }
725
726 if (output[type].user_set)
727 pr_warning("Overriding previous field request for %s events.\n",
728 event_type(type));
729
730 output[type].fields = 0;
731 output[type].user_set = true;
732 output[type].wildcard_set = false;
733
734 } else {
735 tok = str;
736 if (strlen(str) == 0) {
737 fprintf(stderr,
738 "Cannot set fields to 'none' for all event types.\n");
739 rc = -EINVAL;
740 goto out;
741 }
742
743 if (output_set_by_user())
744 pr_warning("Overriding previous field request for all events.\n");
745
746 for (j = 0; j < PERF_TYPE_MAX; ++j) {
747 output[j].fields = 0;
748 output[j].user_set = true;
749 output[j].wildcard_set = true;
750 }
751 }
752
753 tok = strtok(tok, ",");
754 while (tok) {
755 for (i = 0; i < imax; ++i) {
756 if (strcmp(tok, all_output_options[i].str) == 0)
757 break;
758 }
759 if (i == imax) {
760 fprintf(stderr, "Invalid field requested.\n");
761 rc = -EINVAL;
762 goto out;
763 }
764
765 if (type == -1) {
766 /* add user option to all events types for
767 * which it is valid
768 */
769 for (j = 0; j < PERF_TYPE_MAX; ++j) {
770 if (output[j].invalid_fields & all_output_options[i].field) {
771 pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
772 all_output_options[i].str, event_type(j));
773 } else
774 output[j].fields |= all_output_options[i].field;
775 }
776 } else {
777 if (output[type].invalid_fields & all_output_options[i].field) {
778 fprintf(stderr, "\'%s\' not valid for %s events.\n",
779 all_output_options[i].str, event_type(type));
780
781 rc = -EINVAL;
782 goto out;
783 }
784 output[type].fields |= all_output_options[i].field;
785 }
786
787 tok = strtok(NULL, ",");
788 }
789
790 if (type >= 0) {
791 if (output[type].fields == 0) {
792 pr_debug("No fields requested for %s type. "
793 "Events will not be displayed.\n", event_type(type));
794 }
795 }
796
797 out:
798 free(str);
799 return rc;
800 }
801
802 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
803 static int is_directory(const char *base_path, const struct dirent *dent)
804 {
805 char path[PATH_MAX];
806 struct stat st;
807
808 sprintf(path, "%s/%s", base_path, dent->d_name);
809 if (stat(path, &st))
810 return 0;
811
812 return S_ISDIR(st.st_mode);
813 }
814
815 #define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
816 while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) && \
817 lang_next) \
818 if ((lang_dirent.d_type == DT_DIR || \
819 (lang_dirent.d_type == DT_UNKNOWN && \
820 is_directory(scripts_path, &lang_dirent))) && \
821 (strcmp(lang_dirent.d_name, ".")) && \
822 (strcmp(lang_dirent.d_name, "..")))
823
824 #define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
825 while (!readdir_r(lang_dir, &script_dirent, &script_next) && \
826 script_next) \
827 if (script_dirent.d_type != DT_DIR && \
828 (script_dirent.d_type != DT_UNKNOWN || \
829 !is_directory(lang_path, &script_dirent)))
830
831
832 #define RECORD_SUFFIX "-record"
833 #define REPORT_SUFFIX "-report"
834
835 struct script_desc {
836 struct list_head node;
837 char *name;
838 char *half_liner;
839 char *args;
840 };
841
842 static LIST_HEAD(script_descs);
843
844 static struct script_desc *script_desc__new(const char *name)
845 {
846 struct script_desc *s = zalloc(sizeof(*s));
847
848 if (s != NULL && name)
849 s->name = strdup(name);
850
851 return s;
852 }
853
854 static void script_desc__delete(struct script_desc *s)
855 {
856 free(s->name);
857 free(s->half_liner);
858 free(s->args);
859 free(s);
860 }
861
862 static void script_desc__add(struct script_desc *s)
863 {
864 list_add_tail(&s->node, &script_descs);
865 }
866
867 static struct script_desc *script_desc__find(const char *name)
868 {
869 struct script_desc *s;
870
871 list_for_each_entry(s, &script_descs, node)
872 if (strcasecmp(s->name, name) == 0)
873 return s;
874 return NULL;
875 }
876
877 static struct script_desc *script_desc__findnew(const char *name)
878 {
879 struct script_desc *s = script_desc__find(name);
880
881 if (s)
882 return s;
883
884 s = script_desc__new(name);
885 if (!s)
886 goto out_delete_desc;
887
888 script_desc__add(s);
889
890 return s;
891
892 out_delete_desc:
893 script_desc__delete(s);
894
895 return NULL;
896 }
897
898 static const char *ends_with(const char *str, const char *suffix)
899 {
900 size_t suffix_len = strlen(suffix);
901 const char *p = str;
902
903 if (strlen(str) > suffix_len) {
904 p = str + strlen(str) - suffix_len;
905 if (!strncmp(p, suffix, suffix_len))
906 return p;
907 }
908
909 return NULL;
910 }
911
912 static char *ltrim(char *str)
913 {
914 int len = strlen(str);
915
916 while (len && isspace(*str)) {
917 len--;
918 str++;
919 }
920
921 return str;
922 }
923
924 static int read_script_info(struct script_desc *desc, const char *filename)
925 {
926 char line[BUFSIZ], *p;
927 FILE *fp;
928
929 fp = fopen(filename, "r");
930 if (!fp)
931 return -1;
932
933 while (fgets(line, sizeof(line), fp)) {
934 p = ltrim(line);
935 if (strlen(p) == 0)
936 continue;
937 if (*p != '#')
938 continue;
939 p++;
940 if (strlen(p) && *p == '!')
941 continue;
942
943 p = ltrim(p);
944 if (strlen(p) && p[strlen(p) - 1] == '\n')
945 p[strlen(p) - 1] = '\0';
946
947 if (!strncmp(p, "description:", strlen("description:"))) {
948 p += strlen("description:");
949 desc->half_liner = strdup(ltrim(p));
950 continue;
951 }
952
953 if (!strncmp(p, "args:", strlen("args:"))) {
954 p += strlen("args:");
955 desc->args = strdup(ltrim(p));
956 continue;
957 }
958 }
959
960 fclose(fp);
961
962 return 0;
963 }
964
965 static char *get_script_root(struct dirent *script_dirent, const char *suffix)
966 {
967 char *script_root, *str;
968
969 script_root = strdup(script_dirent->d_name);
970 if (!script_root)
971 return NULL;
972
973 str = (char *)ends_with(script_root, suffix);
974 if (!str) {
975 free(script_root);
976 return NULL;
977 }
978
979 *str = '\0';
980 return script_root;
981 }
982
983 static int list_available_scripts(const struct option *opt __maybe_unused,
984 const char *s __maybe_unused,
985 int unset __maybe_unused)
986 {
987 struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
988 char scripts_path[MAXPATHLEN];
989 DIR *scripts_dir, *lang_dir;
990 char script_path[MAXPATHLEN];
991 char lang_path[MAXPATHLEN];
992 struct script_desc *desc;
993 char first_half[BUFSIZ];
994 char *script_root;
995
996 snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
997
998 scripts_dir = opendir(scripts_path);
999 if (!scripts_dir)
1000 return -1;
1001
1002 for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1003 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1004 lang_dirent.d_name);
1005 lang_dir = opendir(lang_path);
1006 if (!lang_dir)
1007 continue;
1008
1009 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1010 script_root = get_script_root(&script_dirent, REPORT_SUFFIX);
1011 if (script_root) {
1012 desc = script_desc__findnew(script_root);
1013 snprintf(script_path, MAXPATHLEN, "%s/%s",
1014 lang_path, script_dirent.d_name);
1015 read_script_info(desc, script_path);
1016 free(script_root);
1017 }
1018 }
1019 }
1020
1021 fprintf(stdout, "List of available trace scripts:\n");
1022 list_for_each_entry(desc, &script_descs, node) {
1023 sprintf(first_half, "%s %s", desc->name,
1024 desc->args ? desc->args : "");
1025 fprintf(stdout, " %-36s %s\n", first_half,
1026 desc->half_liner ? desc->half_liner : "");
1027 }
1028
1029 exit(0);
1030 }
1031
1032 /*
1033 * Return -1 if none is found, otherwise the actual scripts number.
1034 *
1035 * Currently the only user of this function is the script browser, which
1036 * will list all statically runnable scripts, select one, execute it and
1037 * show the output in a perf browser.
1038 */
1039 int find_scripts(char **scripts_array, char **scripts_path_array)
1040 {
1041 struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
1042 char scripts_path[MAXPATHLEN];
1043 DIR *scripts_dir, *lang_dir;
1044 char lang_path[MAXPATHLEN];
1045 char *temp;
1046 int i = 0;
1047
1048 snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1049
1050 scripts_dir = opendir(scripts_path);
1051 if (!scripts_dir)
1052 return -1;
1053
1054 for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1055 snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
1056 lang_dirent.d_name);
1057 #ifdef NO_LIBPERL
1058 if (strstr(lang_path, "perl"))
1059 continue;
1060 #endif
1061 #ifdef NO_LIBPYTHON
1062 if (strstr(lang_path, "python"))
1063 continue;
1064 #endif
1065
1066 lang_dir = opendir(lang_path);
1067 if (!lang_dir)
1068 continue;
1069
1070 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1071 /* Skip those real time scripts: xxxtop.p[yl] */
1072 if (strstr(script_dirent.d_name, "top."))
1073 continue;
1074 sprintf(scripts_path_array[i], "%s/%s", lang_path,
1075 script_dirent.d_name);
1076 temp = strchr(script_dirent.d_name, '.');
1077 snprintf(scripts_array[i],
1078 (temp - script_dirent.d_name) + 1,
1079 "%s", script_dirent.d_name);
1080 i++;
1081 }
1082 }
1083
1084 return i;
1085 }
1086
1087 static char *get_script_path(const char *script_root, const char *suffix)
1088 {
1089 struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
1090 char scripts_path[MAXPATHLEN];
1091 char script_path[MAXPATHLEN];
1092 DIR *scripts_dir, *lang_dir;
1093 char lang_path[MAXPATHLEN];
1094 char *__script_root;
1095
1096 snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1097
1098 scripts_dir = opendir(scripts_path);
1099 if (!scripts_dir)
1100 return NULL;
1101
1102 for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1103 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1104 lang_dirent.d_name);
1105 lang_dir = opendir(lang_path);
1106 if (!lang_dir)
1107 continue;
1108
1109 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1110 __script_root = get_script_root(&script_dirent, suffix);
1111 if (__script_root && !strcmp(script_root, __script_root)) {
1112 free(__script_root);
1113 closedir(lang_dir);
1114 closedir(scripts_dir);
1115 snprintf(script_path, MAXPATHLEN, "%s/%s",
1116 lang_path, script_dirent.d_name);
1117 return strdup(script_path);
1118 }
1119 free(__script_root);
1120 }
1121 closedir(lang_dir);
1122 }
1123 closedir(scripts_dir);
1124
1125 return NULL;
1126 }
1127
1128 static bool is_top_script(const char *script_path)
1129 {
1130 return ends_with(script_path, "top") == NULL ? false : true;
1131 }
1132
1133 static int has_required_arg(char *script_path)
1134 {
1135 struct script_desc *desc;
1136 int n_args = 0;
1137 char *p;
1138
1139 desc = script_desc__new(NULL);
1140
1141 if (read_script_info(desc, script_path))
1142 goto out;
1143
1144 if (!desc->args)
1145 goto out;
1146
1147 for (p = desc->args; *p; p++)
1148 if (*p == '<')
1149 n_args++;
1150 out:
1151 script_desc__delete(desc);
1152
1153 return n_args;
1154 }
1155
1156 static int have_cmd(int argc, const char **argv)
1157 {
1158 char **__argv = malloc(sizeof(const char *) * argc);
1159
1160 if (!__argv) {
1161 pr_err("malloc failed\n");
1162 return -1;
1163 }
1164
1165 memcpy(__argv, argv, sizeof(const char *) * argc);
1166 argc = parse_options(argc, (const char **)__argv, record_options,
1167 NULL, PARSE_OPT_STOP_AT_NON_OPTION);
1168 free(__argv);
1169
1170 system_wide = (argc == 0);
1171
1172 return 0;
1173 }
1174
1175 int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
1176 {
1177 bool show_full_info = false;
1178 const char *input_name = NULL;
1179 char *rec_script_path = NULL;
1180 char *rep_script_path = NULL;
1181 struct perf_session *session;
1182 char *script_path = NULL;
1183 const char **__argv;
1184 int i, j, err;
1185 const struct option options[] = {
1186 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1187 "dump raw trace in ASCII"),
1188 OPT_INCR('v', "verbose", &verbose,
1189 "be more verbose (show symbol address, etc)"),
1190 OPT_BOOLEAN('L', "Latency", &latency_format,
1191 "show latency attributes (irqs/preemption disabled, etc)"),
1192 OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
1193 list_available_scripts),
1194 OPT_CALLBACK('s', "script", NULL, "name",
1195 "script file name (lang:script name, script name, or *)",
1196 parse_scriptname),
1197 OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
1198 "generate perf-script.xx script in specified language"),
1199 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1200 OPT_BOOLEAN('d', "debug-mode", &debug_mode,
1201 "do various checks like samples ordering and lost events"),
1202 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1203 "file", "vmlinux pathname"),
1204 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1205 "file", "kallsyms pathname"),
1206 OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
1207 "When printing symbols do not display call chain"),
1208 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1209 "Look for files with symbols relative to this directory"),
1210 OPT_CALLBACK('f', "fields", NULL, "str",
1211 "comma separated output fields prepend with 'type:'. "
1212 "Valid types: hw,sw,trace,raw. "
1213 "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
1214 "addr,symoff", parse_output_fields),
1215 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1216 "system-wide collection from all CPUs"),
1217 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1218 "only consider these symbols"),
1219 OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1220 OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1221 "only display events for these comms"),
1222 OPT_BOOLEAN('I', "show-info", &show_full_info,
1223 "display extended information from perf.data file"),
1224 OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
1225 "Show the path of [kernel.kallsyms]"),
1226 OPT_END()
1227 };
1228 const char * const script_usage[] = {
1229 "perf script [<options>]",
1230 "perf script [<options>] record <script> [<record-options>] <command>",
1231 "perf script [<options>] report <script> [script-args]",
1232 "perf script [<options>] <script> [<record-options>] <command>",
1233 "perf script [<options>] <top-script> [script-args]",
1234 NULL
1235 };
1236
1237 setup_scripting();
1238
1239 argc = parse_options(argc, argv, options, script_usage,
1240 PARSE_OPT_STOP_AT_NON_OPTION);
1241
1242 if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
1243 rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
1244 if (!rec_script_path)
1245 return cmd_record(argc, argv, NULL);
1246 }
1247
1248 if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
1249 rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
1250 if (!rep_script_path) {
1251 fprintf(stderr,
1252 "Please specify a valid report script"
1253 "(see 'perf script -l' for listing)\n");
1254 return -1;
1255 }
1256 }
1257
1258 /* make sure PERF_EXEC_PATH is set for scripts */
1259 perf_set_argv_exec_path(perf_exec_path());
1260
1261 if (argc && !script_name && !rec_script_path && !rep_script_path) {
1262 int live_pipe[2];
1263 int rep_args;
1264 pid_t pid;
1265
1266 rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
1267 rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
1268
1269 if (!rec_script_path && !rep_script_path) {
1270 fprintf(stderr, " Couldn't find script %s\n\n See perf"
1271 " script -l for available scripts.\n", argv[0]);
1272 usage_with_options(script_usage, options);
1273 }
1274
1275 if (is_top_script(argv[0])) {
1276 rep_args = argc - 1;
1277 } else {
1278 int rec_args;
1279
1280 rep_args = has_required_arg(rep_script_path);
1281 rec_args = (argc - 1) - rep_args;
1282 if (rec_args < 0) {
1283 fprintf(stderr, " %s script requires options."
1284 "\n\n See perf script -l for available "
1285 "scripts and options.\n", argv[0]);
1286 usage_with_options(script_usage, options);
1287 }
1288 }
1289
1290 if (pipe(live_pipe) < 0) {
1291 perror("failed to create pipe");
1292 return -1;
1293 }
1294
1295 pid = fork();
1296 if (pid < 0) {
1297 perror("failed to fork");
1298 return -1;
1299 }
1300
1301 if (!pid) {
1302 j = 0;
1303
1304 dup2(live_pipe[1], 1);
1305 close(live_pipe[0]);
1306
1307 if (is_top_script(argv[0])) {
1308 system_wide = true;
1309 } else if (!system_wide) {
1310 if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
1311 err = -1;
1312 goto out;
1313 }
1314 }
1315
1316 __argv = malloc((argc + 6) * sizeof(const char *));
1317 if (!__argv) {
1318 pr_err("malloc failed\n");
1319 err = -ENOMEM;
1320 goto out;
1321 }
1322
1323 __argv[j++] = "/bin/sh";
1324 __argv[j++] = rec_script_path;
1325 if (system_wide)
1326 __argv[j++] = "-a";
1327 __argv[j++] = "-q";
1328 __argv[j++] = "-o";
1329 __argv[j++] = "-";
1330 for (i = rep_args + 1; i < argc; i++)
1331 __argv[j++] = argv[i];
1332 __argv[j++] = NULL;
1333
1334 execvp("/bin/sh", (char **)__argv);
1335 free(__argv);
1336 exit(-1);
1337 }
1338
1339 dup2(live_pipe[0], 0);
1340 close(live_pipe[1]);
1341
1342 __argv = malloc((argc + 4) * sizeof(const char *));
1343 if (!__argv) {
1344 pr_err("malloc failed\n");
1345 err = -ENOMEM;
1346 goto out;
1347 }
1348
1349 j = 0;
1350 __argv[j++] = "/bin/sh";
1351 __argv[j++] = rep_script_path;
1352 for (i = 1; i < rep_args + 1; i++)
1353 __argv[j++] = argv[i];
1354 __argv[j++] = "-i";
1355 __argv[j++] = "-";
1356 __argv[j++] = NULL;
1357
1358 execvp("/bin/sh", (char **)__argv);
1359 free(__argv);
1360 exit(-1);
1361 }
1362
1363 if (rec_script_path)
1364 script_path = rec_script_path;
1365 if (rep_script_path)
1366 script_path = rep_script_path;
1367
1368 if (script_path) {
1369 j = 0;
1370
1371 if (!rec_script_path)
1372 system_wide = false;
1373 else if (!system_wide) {
1374 if (have_cmd(argc - 1, &argv[1]) != 0) {
1375 err = -1;
1376 goto out;
1377 }
1378 }
1379
1380 __argv = malloc((argc + 2) * sizeof(const char *));
1381 if (!__argv) {
1382 pr_err("malloc failed\n");
1383 err = -ENOMEM;
1384 goto out;
1385 }
1386
1387 __argv[j++] = "/bin/sh";
1388 __argv[j++] = script_path;
1389 if (system_wide)
1390 __argv[j++] = "-a";
1391 for (i = 2; i < argc; i++)
1392 __argv[j++] = argv[i];
1393 __argv[j++] = NULL;
1394
1395 execvp("/bin/sh", (char **)__argv);
1396 free(__argv);
1397 exit(-1);
1398 }
1399
1400 if (symbol__init() < 0)
1401 return -1;
1402 if (!script_name)
1403 setup_pager();
1404
1405 session = perf_session__new(input_name, O_RDONLY, 0, false,
1406 &perf_script);
1407 if (session == NULL)
1408 return -ENOMEM;
1409
1410 if (cpu_list) {
1411 if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
1412 return -1;
1413 }
1414
1415 perf_session__fprintf_info(session, stdout, show_full_info);
1416
1417 if (!no_callchain)
1418 symbol_conf.use_callchain = true;
1419 else
1420 symbol_conf.use_callchain = false;
1421
1422 if (generate_script_lang) {
1423 struct stat perf_stat;
1424 int input;
1425
1426 if (output_set_by_user()) {
1427 fprintf(stderr,
1428 "custom fields not supported for generated scripts");
1429 return -1;
1430 }
1431
1432 input = open(session->filename, O_RDONLY); /* input_name */
1433 if (input < 0) {
1434 perror("failed to open file");
1435 return -1;
1436 }
1437
1438 err = fstat(input, &perf_stat);
1439 if (err < 0) {
1440 perror("failed to stat file");
1441 return -1;
1442 }
1443
1444 if (!perf_stat.st_size) {
1445 fprintf(stderr, "zero-sized file, nothing to do!\n");
1446 return 0;
1447 }
1448
1449 scripting_ops = script_spec__lookup(generate_script_lang);
1450 if (!scripting_ops) {
1451 fprintf(stderr, "invalid language specifier");
1452 return -1;
1453 }
1454
1455 err = scripting_ops->generate_script(session->pevent,
1456 "perf-script");
1457 goto out;
1458 }
1459
1460 if (script_name) {
1461 err = scripting_ops->start_script(script_name, argc, argv);
1462 if (err)
1463 goto out;
1464 pr_debug("perf script started with script %s\n\n", script_name);
1465 }
1466
1467
1468 err = perf_session__check_output_opt(session);
1469 if (err < 0)
1470 goto out;
1471
1472 err = __cmd_script(session);
1473
1474 perf_session__delete(session);
1475 cleanup_scripting();
1476 out:
1477 return err;
1478 }
Linux kernel - Deliverables
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