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Merge branch 'kvm-updates/2.6.40' of git://git.kernel.org/pub/scm/virt/kvm/kvm
[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/symbol.h"
11 #include "util/thread.h"
12 #include "util/trace-event.h"
13 #include "util/parse-options.h"
14 #include "util/util.h"
15 #include "util/evlist.h"
16 #include "util/evsel.h"
17
18 static char const *script_name;
19 static char const *generate_script_lang;
20 static bool debug_mode;
21 static u64 last_timestamp;
22 static u64 nr_unordered;
23 extern const struct option record_options[];
24 static bool no_callchain;
25
26 enum perf_output_field {
27 PERF_OUTPUT_COMM = 1U << 0,
28 PERF_OUTPUT_TID = 1U << 1,
29 PERF_OUTPUT_PID = 1U << 2,
30 PERF_OUTPUT_TIME = 1U << 3,
31 PERF_OUTPUT_CPU = 1U << 4,
32 PERF_OUTPUT_EVNAME = 1U << 5,
33 PERF_OUTPUT_TRACE = 1U << 6,
34 PERF_OUTPUT_SYM = 1U << 7,
35 };
36
37 struct output_option {
38 const char *str;
39 enum perf_output_field field;
40 } all_output_options[] = {
41 {.str = "comm", .field = PERF_OUTPUT_COMM},
42 {.str = "tid", .field = PERF_OUTPUT_TID},
43 {.str = "pid", .field = PERF_OUTPUT_PID},
44 {.str = "time", .field = PERF_OUTPUT_TIME},
45 {.str = "cpu", .field = PERF_OUTPUT_CPU},
46 {.str = "event", .field = PERF_OUTPUT_EVNAME},
47 {.str = "trace", .field = PERF_OUTPUT_TRACE},
48 {.str = "sym", .field = PERF_OUTPUT_SYM},
49 };
50
51 /* default set to maintain compatibility with current format */
52 static struct {
53 bool user_set;
54 bool wildcard_set;
55 u64 fields;
56 u64 invalid_fields;
57 } output[PERF_TYPE_MAX] = {
58
59 [PERF_TYPE_HARDWARE] = {
60 .user_set = false,
61
62 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
63 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
64 PERF_OUTPUT_EVNAME | PERF_OUTPUT_SYM,
65
66 .invalid_fields = PERF_OUTPUT_TRACE,
67 },
68
69 [PERF_TYPE_SOFTWARE] = {
70 .user_set = false,
71
72 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
73 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
74 PERF_OUTPUT_EVNAME | PERF_OUTPUT_SYM,
75
76 .invalid_fields = PERF_OUTPUT_TRACE,
77 },
78
79 [PERF_TYPE_TRACEPOINT] = {
80 .user_set = false,
81
82 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
83 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
84 PERF_OUTPUT_EVNAME | PERF_OUTPUT_TRACE,
85 },
86
87 [PERF_TYPE_RAW] = {
88 .user_set = false,
89
90 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
91 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
92 PERF_OUTPUT_EVNAME | PERF_OUTPUT_SYM,
93
94 .invalid_fields = PERF_OUTPUT_TRACE,
95 },
96 };
97
98 static bool output_set_by_user(void)
99 {
100 int j;
101 for (j = 0; j < PERF_TYPE_MAX; ++j) {
102 if (output[j].user_set)
103 return true;
104 }
105 return false;
106 }
107
108 static const char *output_field2str(enum perf_output_field field)
109 {
110 int i, imax = ARRAY_SIZE(all_output_options);
111 const char *str = "";
112
113 for (i = 0; i < imax; ++i) {
114 if (all_output_options[i].field == field) {
115 str = all_output_options[i].str;
116 break;
117 }
118 }
119 return str;
120 }
121
122 #define PRINT_FIELD(x) (output[attr->type].fields & PERF_OUTPUT_##x)
123
124 static int perf_event_attr__check_stype(struct perf_event_attr *attr,
125 u64 sample_type, const char *sample_msg,
126 enum perf_output_field field)
127 {
128 int type = attr->type;
129 const char *evname;
130
131 if (attr->sample_type & sample_type)
132 return 0;
133
134 if (output[type].user_set) {
135 evname = __event_name(attr->type, attr->config);
136 pr_err("Samples for '%s' event do not have %s attribute set. "
137 "Cannot print '%s' field.\n",
138 evname, sample_msg, output_field2str(field));
139 return -1;
140 }
141
142 /* user did not ask for it explicitly so remove from the default list */
143 output[type].fields &= ~field;
144 evname = __event_name(attr->type, attr->config);
145 pr_debug("Samples for '%s' event do not have %s attribute set. "
146 "Skipping '%s' field.\n",
147 evname, sample_msg, output_field2str(field));
148
149 return 0;
150 }
151
152 static int perf_evsel__check_attr(struct perf_evsel *evsel,
153 struct perf_session *session)
154 {
155 struct perf_event_attr *attr = &evsel->attr;
156
157 if (PRINT_FIELD(TRACE) &&
158 !perf_session__has_traces(session, "record -R"))
159 return -EINVAL;
160
161 if (PRINT_FIELD(SYM)) {
162 if (perf_event_attr__check_stype(attr, PERF_SAMPLE_IP, "IP",
163 PERF_OUTPUT_SYM))
164 return -EINVAL;
165
166 if (!no_callchain &&
167 !(attr->sample_type & PERF_SAMPLE_CALLCHAIN))
168 symbol_conf.use_callchain = false;
169 }
170
171 if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
172 perf_event_attr__check_stype(attr, PERF_SAMPLE_TID, "TID",
173 PERF_OUTPUT_TID|PERF_OUTPUT_PID))
174 return -EINVAL;
175
176 if (PRINT_FIELD(TIME) &&
177 perf_event_attr__check_stype(attr, PERF_SAMPLE_TIME, "TIME",
178 PERF_OUTPUT_TIME))
179 return -EINVAL;
180
181 if (PRINT_FIELD(CPU) &&
182 perf_event_attr__check_stype(attr, PERF_SAMPLE_CPU, "CPU",
183 PERF_OUTPUT_CPU))
184 return -EINVAL;
185
186 return 0;
187 }
188
189 /*
190 * verify all user requested events exist and the samples
191 * have the expected data
192 */
193 static int perf_session__check_output_opt(struct perf_session *session)
194 {
195 int j;
196 struct perf_evsel *evsel;
197
198 for (j = 0; j < PERF_TYPE_MAX; ++j) {
199 evsel = perf_session__find_first_evtype(session, j);
200
201 /*
202 * even if fields is set to 0 (ie., show nothing) event must
203 * exist if user explicitly includes it on the command line
204 */
205 if (!evsel && output[j].user_set && !output[j].wildcard_set) {
206 pr_err("%s events do not exist. "
207 "Remove corresponding -f option to proceed.\n",
208 event_type(j));
209 return -1;
210 }
211
212 if (evsel && output[j].fields &&
213 perf_evsel__check_attr(evsel, session))
214 return -1;
215 }
216
217 return 0;
218 }
219
220 static void print_sample_start(struct perf_sample *sample,
221 struct thread *thread,
222 struct perf_event_attr *attr)
223 {
224 int type;
225 struct event *event;
226 const char *evname = NULL;
227 unsigned long secs;
228 unsigned long usecs;
229 unsigned long long nsecs;
230
231 if (PRINT_FIELD(COMM)) {
232 if (latency_format)
233 printf("%8.8s ", thread->comm);
234 else if (PRINT_FIELD(SYM) && symbol_conf.use_callchain)
235 printf("%s ", thread->comm);
236 else
237 printf("%16s ", thread->comm);
238 }
239
240 if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
241 printf("%5d/%-5d ", sample->pid, sample->tid);
242 else if (PRINT_FIELD(PID))
243 printf("%5d ", sample->pid);
244 else if (PRINT_FIELD(TID))
245 printf("%5d ", sample->tid);
246
247 if (PRINT_FIELD(CPU)) {
248 if (latency_format)
249 printf("%3d ", sample->cpu);
250 else
251 printf("[%03d] ", sample->cpu);
252 }
253
254 if (PRINT_FIELD(TIME)) {
255 nsecs = sample->time;
256 secs = nsecs / NSECS_PER_SEC;
257 nsecs -= secs * NSECS_PER_SEC;
258 usecs = nsecs / NSECS_PER_USEC;
259 printf("%5lu.%06lu: ", secs, usecs);
260 }
261
262 if (PRINT_FIELD(EVNAME)) {
263 if (attr->type == PERF_TYPE_TRACEPOINT) {
264 type = trace_parse_common_type(sample->raw_data);
265 event = trace_find_event(type);
266 if (event)
267 evname = event->name;
268 } else
269 evname = __event_name(attr->type, attr->config);
270
271 printf("%s: ", evname ? evname : "(unknown)");
272 }
273 }
274
275 static void process_event(union perf_event *event __unused,
276 struct perf_sample *sample,
277 struct perf_evsel *evsel,
278 struct perf_session *session,
279 struct thread *thread)
280 {
281 struct perf_event_attr *attr = &evsel->attr;
282
283 if (output[attr->type].fields == 0)
284 return;
285
286 print_sample_start(sample, thread, attr);
287
288 if (PRINT_FIELD(TRACE))
289 print_trace_event(sample->cpu, sample->raw_data,
290 sample->raw_size);
291
292 if (PRINT_FIELD(SYM)) {
293 if (!symbol_conf.use_callchain)
294 printf(" ");
295 else
296 printf("\n");
297 perf_session__print_symbols(event, sample, session);
298 }
299
300 printf("\n");
301 }
302
303 static int default_start_script(const char *script __unused,
304 int argc __unused,
305 const char **argv __unused)
306 {
307 return 0;
308 }
309
310 static int default_stop_script(void)
311 {
312 return 0;
313 }
314
315 static int default_generate_script(const char *outfile __unused)
316 {
317 return 0;
318 }
319
320 static struct scripting_ops default_scripting_ops = {
321 .start_script = default_start_script,
322 .stop_script = default_stop_script,
323 .process_event = process_event,
324 .generate_script = default_generate_script,
325 };
326
327 static struct scripting_ops *scripting_ops;
328
329 static void setup_scripting(void)
330 {
331 setup_perl_scripting();
332 setup_python_scripting();
333
334 scripting_ops = &default_scripting_ops;
335 }
336
337 static int cleanup_scripting(void)
338 {
339 pr_debug("\nperf script stopped\n");
340
341 return scripting_ops->stop_script();
342 }
343
344 static char const *input_name = "perf.data";
345
346 static int process_sample_event(union perf_event *event,
347 struct perf_sample *sample,
348 struct perf_evsel *evsel,
349 struct perf_session *session)
350 {
351 struct thread *thread = perf_session__findnew(session, event->ip.pid);
352
353 if (thread == NULL) {
354 pr_debug("problem processing %d event, skipping it.\n",
355 event->header.type);
356 return -1;
357 }
358
359 if (debug_mode) {
360 if (sample->time < last_timestamp) {
361 pr_err("Samples misordered, previous: %" PRIu64
362 " this: %" PRIu64 "\n", last_timestamp,
363 sample->time);
364 nr_unordered++;
365 }
366 last_timestamp = sample->time;
367 return 0;
368 }
369 scripting_ops->process_event(event, sample, evsel, session, thread);
370
371 session->hists.stats.total_period += sample->period;
372 return 0;
373 }
374
375 static struct perf_event_ops event_ops = {
376 .sample = process_sample_event,
377 .mmap = perf_event__process_mmap,
378 .comm = perf_event__process_comm,
379 .exit = perf_event__process_task,
380 .fork = perf_event__process_task,
381 .attr = perf_event__process_attr,
382 .event_type = perf_event__process_event_type,
383 .tracing_data = perf_event__process_tracing_data,
384 .build_id = perf_event__process_build_id,
385 .ordered_samples = true,
386 .ordering_requires_timestamps = true,
387 };
388
389 extern volatile int session_done;
390
391 static void sig_handler(int sig __unused)
392 {
393 session_done = 1;
394 }
395
396 static int __cmd_script(struct perf_session *session)
397 {
398 int ret;
399
400 signal(SIGINT, sig_handler);
401
402 ret = perf_session__process_events(session, &event_ops);
403
404 if (debug_mode)
405 pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
406
407 return ret;
408 }
409
410 struct script_spec {
411 struct list_head node;
412 struct scripting_ops *ops;
413 char spec[0];
414 };
415
416 static LIST_HEAD(script_specs);
417
418 static struct script_spec *script_spec__new(const char *spec,
419 struct scripting_ops *ops)
420 {
421 struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
422
423 if (s != NULL) {
424 strcpy(s->spec, spec);
425 s->ops = ops;
426 }
427
428 return s;
429 }
430
431 static void script_spec__delete(struct script_spec *s)
432 {
433 free(s->spec);
434 free(s);
435 }
436
437 static void script_spec__add(struct script_spec *s)
438 {
439 list_add_tail(&s->node, &script_specs);
440 }
441
442 static struct script_spec *script_spec__find(const char *spec)
443 {
444 struct script_spec *s;
445
446 list_for_each_entry(s, &script_specs, node)
447 if (strcasecmp(s->spec, spec) == 0)
448 return s;
449 return NULL;
450 }
451
452 static struct script_spec *script_spec__findnew(const char *spec,
453 struct scripting_ops *ops)
454 {
455 struct script_spec *s = script_spec__find(spec);
456
457 if (s)
458 return s;
459
460 s = script_spec__new(spec, ops);
461 if (!s)
462 goto out_delete_spec;
463
464 script_spec__add(s);
465
466 return s;
467
468 out_delete_spec:
469 script_spec__delete(s);
470
471 return NULL;
472 }
473
474 int script_spec_register(const char *spec, struct scripting_ops *ops)
475 {
476 struct script_spec *s;
477
478 s = script_spec__find(spec);
479 if (s)
480 return -1;
481
482 s = script_spec__findnew(spec, ops);
483 if (!s)
484 return -1;
485
486 return 0;
487 }
488
489 static struct scripting_ops *script_spec__lookup(const char *spec)
490 {
491 struct script_spec *s = script_spec__find(spec);
492 if (!s)
493 return NULL;
494
495 return s->ops;
496 }
497
498 static void list_available_languages(void)
499 {
500 struct script_spec *s;
501
502 fprintf(stderr, "\n");
503 fprintf(stderr, "Scripting language extensions (used in "
504 "perf script -s [spec:]script.[spec]):\n\n");
505
506 list_for_each_entry(s, &script_specs, node)
507 fprintf(stderr, " %-42s [%s]\n", s->spec, s->ops->name);
508
509 fprintf(stderr, "\n");
510 }
511
512 static int parse_scriptname(const struct option *opt __used,
513 const char *str, int unset __used)
514 {
515 char spec[PATH_MAX];
516 const char *script, *ext;
517 int len;
518
519 if (strcmp(str, "lang") == 0) {
520 list_available_languages();
521 exit(0);
522 }
523
524 script = strchr(str, ':');
525 if (script) {
526 len = script - str;
527 if (len >= PATH_MAX) {
528 fprintf(stderr, "invalid language specifier");
529 return -1;
530 }
531 strncpy(spec, str, len);
532 spec[len] = '\0';
533 scripting_ops = script_spec__lookup(spec);
534 if (!scripting_ops) {
535 fprintf(stderr, "invalid language specifier");
536 return -1;
537 }
538 script++;
539 } else {
540 script = str;
541 ext = strrchr(script, '.');
542 if (!ext) {
543 fprintf(stderr, "invalid script extension");
544 return -1;
545 }
546 scripting_ops = script_spec__lookup(++ext);
547 if (!scripting_ops) {
548 fprintf(stderr, "invalid script extension");
549 return -1;
550 }
551 }
552
553 script_name = strdup(script);
554
555 return 0;
556 }
557
558 static int parse_output_fields(const struct option *opt __used,
559 const char *arg, int unset __used)
560 {
561 char *tok;
562 int i, imax = sizeof(all_output_options) / sizeof(struct output_option);
563 int j;
564 int rc = 0;
565 char *str = strdup(arg);
566 int type = -1;
567
568 if (!str)
569 return -ENOMEM;
570
571 /* first word can state for which event type the user is specifying
572 * the fields. If no type exists, the specified fields apply to all
573 * event types found in the file minus the invalid fields for a type.
574 */
575 tok = strchr(str, ':');
576 if (tok) {
577 *tok = '\0';
578 tok++;
579 if (!strcmp(str, "hw"))
580 type = PERF_TYPE_HARDWARE;
581 else if (!strcmp(str, "sw"))
582 type = PERF_TYPE_SOFTWARE;
583 else if (!strcmp(str, "trace"))
584 type = PERF_TYPE_TRACEPOINT;
585 else if (!strcmp(str, "raw"))
586 type = PERF_TYPE_RAW;
587 else {
588 fprintf(stderr, "Invalid event type in field string.\n");
589 return -EINVAL;
590 }
591
592 if (output[type].user_set)
593 pr_warning("Overriding previous field request for %s events.\n",
594 event_type(type));
595
596 output[type].fields = 0;
597 output[type].user_set = true;
598 output[type].wildcard_set = false;
599
600 } else {
601 tok = str;
602 if (strlen(str) == 0) {
603 fprintf(stderr,
604 "Cannot set fields to 'none' for all event types.\n");
605 rc = -EINVAL;
606 goto out;
607 }
608
609 if (output_set_by_user())
610 pr_warning("Overriding previous field request for all events.\n");
611
612 for (j = 0; j < PERF_TYPE_MAX; ++j) {
613 output[j].fields = 0;
614 output[j].user_set = true;
615 output[j].wildcard_set = true;
616 }
617 }
618
619 tok = strtok(tok, ",");
620 while (tok) {
621 for (i = 0; i < imax; ++i) {
622 if (strcmp(tok, all_output_options[i].str) == 0)
623 break;
624 }
625 if (i == imax) {
626 fprintf(stderr, "Invalid field requested.\n");
627 rc = -EINVAL;
628 goto out;
629 }
630
631 if (type == -1) {
632 /* add user option to all events types for
633 * which it is valid
634 */
635 for (j = 0; j < PERF_TYPE_MAX; ++j) {
636 if (output[j].invalid_fields & all_output_options[i].field) {
637 pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
638 all_output_options[i].str, event_type(j));
639 } else
640 output[j].fields |= all_output_options[i].field;
641 }
642 } else {
643 if (output[type].invalid_fields & all_output_options[i].field) {
644 fprintf(stderr, "\'%s\' not valid for %s events.\n",
645 all_output_options[i].str, event_type(type));
646
647 rc = -EINVAL;
648 goto out;
649 }
650 output[type].fields |= all_output_options[i].field;
651 }
652
653 tok = strtok(NULL, ",");
654 }
655
656 if (type >= 0) {
657 if (output[type].fields == 0) {
658 pr_debug("No fields requested for %s type. "
659 "Events will not be displayed.\n", event_type(type));
660 }
661 }
662
663 out:
664 free(str);
665 return rc;
666 }
667
668 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
669 static int is_directory(const char *base_path, const struct dirent *dent)
670 {
671 char path[PATH_MAX];
672 struct stat st;
673
674 sprintf(path, "%s/%s", base_path, dent->d_name);
675 if (stat(path, &st))
676 return 0;
677
678 return S_ISDIR(st.st_mode);
679 }
680
681 #define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
682 while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) && \
683 lang_next) \
684 if ((lang_dirent.d_type == DT_DIR || \
685 (lang_dirent.d_type == DT_UNKNOWN && \
686 is_directory(scripts_path, &lang_dirent))) && \
687 (strcmp(lang_dirent.d_name, ".")) && \
688 (strcmp(lang_dirent.d_name, "..")))
689
690 #define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
691 while (!readdir_r(lang_dir, &script_dirent, &script_next) && \
692 script_next) \
693 if (script_dirent.d_type != DT_DIR && \
694 (script_dirent.d_type != DT_UNKNOWN || \
695 !is_directory(lang_path, &script_dirent)))
696
697
698 #define RECORD_SUFFIX "-record"
699 #define REPORT_SUFFIX "-report"
700
701 struct script_desc {
702 struct list_head node;
703 char *name;
704 char *half_liner;
705 char *args;
706 };
707
708 static LIST_HEAD(script_descs);
709
710 static struct script_desc *script_desc__new(const char *name)
711 {
712 struct script_desc *s = zalloc(sizeof(*s));
713
714 if (s != NULL && name)
715 s->name = strdup(name);
716
717 return s;
718 }
719
720 static void script_desc__delete(struct script_desc *s)
721 {
722 free(s->name);
723 free(s->half_liner);
724 free(s->args);
725 free(s);
726 }
727
728 static void script_desc__add(struct script_desc *s)
729 {
730 list_add_tail(&s->node, &script_descs);
731 }
732
733 static struct script_desc *script_desc__find(const char *name)
734 {
735 struct script_desc *s;
736
737 list_for_each_entry(s, &script_descs, node)
738 if (strcasecmp(s->name, name) == 0)
739 return s;
740 return NULL;
741 }
742
743 static struct script_desc *script_desc__findnew(const char *name)
744 {
745 struct script_desc *s = script_desc__find(name);
746
747 if (s)
748 return s;
749
750 s = script_desc__new(name);
751 if (!s)
752 goto out_delete_desc;
753
754 script_desc__add(s);
755
756 return s;
757
758 out_delete_desc:
759 script_desc__delete(s);
760
761 return NULL;
762 }
763
764 static const char *ends_with(const char *str, const char *suffix)
765 {
766 size_t suffix_len = strlen(suffix);
767 const char *p = str;
768
769 if (strlen(str) > suffix_len) {
770 p = str + strlen(str) - suffix_len;
771 if (!strncmp(p, suffix, suffix_len))
772 return p;
773 }
774
775 return NULL;
776 }
777
778 static char *ltrim(char *str)
779 {
780 int len = strlen(str);
781
782 while (len && isspace(*str)) {
783 len--;
784 str++;
785 }
786
787 return str;
788 }
789
790 static int read_script_info(struct script_desc *desc, const char *filename)
791 {
792 char line[BUFSIZ], *p;
793 FILE *fp;
794
795 fp = fopen(filename, "r");
796 if (!fp)
797 return -1;
798
799 while (fgets(line, sizeof(line), fp)) {
800 p = ltrim(line);
801 if (strlen(p) == 0)
802 continue;
803 if (*p != '#')
804 continue;
805 p++;
806 if (strlen(p) && *p == '!')
807 continue;
808
809 p = ltrim(p);
810 if (strlen(p) && p[strlen(p) - 1] == '\n')
811 p[strlen(p) - 1] = '\0';
812
813 if (!strncmp(p, "description:", strlen("description:"))) {
814 p += strlen("description:");
815 desc->half_liner = strdup(ltrim(p));
816 continue;
817 }
818
819 if (!strncmp(p, "args:", strlen("args:"))) {
820 p += strlen("args:");
821 desc->args = strdup(ltrim(p));
822 continue;
823 }
824 }
825
826 fclose(fp);
827
828 return 0;
829 }
830
831 static int list_available_scripts(const struct option *opt __used,
832 const char *s __used, int unset __used)
833 {
834 struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
835 char scripts_path[MAXPATHLEN];
836 DIR *scripts_dir, *lang_dir;
837 char script_path[MAXPATHLEN];
838 char lang_path[MAXPATHLEN];
839 struct script_desc *desc;
840 char first_half[BUFSIZ];
841 char *script_root;
842 char *str;
843
844 snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
845
846 scripts_dir = opendir(scripts_path);
847 if (!scripts_dir)
848 return -1;
849
850 for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
851 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
852 lang_dirent.d_name);
853 lang_dir = opendir(lang_path);
854 if (!lang_dir)
855 continue;
856
857 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
858 script_root = strdup(script_dirent.d_name);
859 str = (char *)ends_with(script_root, REPORT_SUFFIX);
860 if (str) {
861 *str = '\0';
862 desc = script_desc__findnew(script_root);
863 snprintf(script_path, MAXPATHLEN, "%s/%s",
864 lang_path, script_dirent.d_name);
865 read_script_info(desc, script_path);
866 }
867 free(script_root);
868 }
869 }
870
871 fprintf(stdout, "List of available trace scripts:\n");
872 list_for_each_entry(desc, &script_descs, node) {
873 sprintf(first_half, "%s %s", desc->name,
874 desc->args ? desc->args : "");
875 fprintf(stdout, " %-36s %s\n", first_half,
876 desc->half_liner ? desc->half_liner : "");
877 }
878
879 exit(0);
880 }
881
882 static char *get_script_path(const char *script_root, const char *suffix)
883 {
884 struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
885 char scripts_path[MAXPATHLEN];
886 char script_path[MAXPATHLEN];
887 DIR *scripts_dir, *lang_dir;
888 char lang_path[MAXPATHLEN];
889 char *str, *__script_root;
890 char *path = NULL;
891
892 snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
893
894 scripts_dir = opendir(scripts_path);
895 if (!scripts_dir)
896 return NULL;
897
898 for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
899 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
900 lang_dirent.d_name);
901 lang_dir = opendir(lang_path);
902 if (!lang_dir)
903 continue;
904
905 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
906 __script_root = strdup(script_dirent.d_name);
907 str = (char *)ends_with(__script_root, suffix);
908 if (str) {
909 *str = '\0';
910 if (strcmp(__script_root, script_root))
911 continue;
912 snprintf(script_path, MAXPATHLEN, "%s/%s",
913 lang_path, script_dirent.d_name);
914 path = strdup(script_path);
915 free(__script_root);
916 break;
917 }
918 free(__script_root);
919 }
920 }
921
922 return path;
923 }
924
925 static bool is_top_script(const char *script_path)
926 {
927 return ends_with(script_path, "top") == NULL ? false : true;
928 }
929
930 static int has_required_arg(char *script_path)
931 {
932 struct script_desc *desc;
933 int n_args = 0;
934 char *p;
935
936 desc = script_desc__new(NULL);
937
938 if (read_script_info(desc, script_path))
939 goto out;
940
941 if (!desc->args)
942 goto out;
943
944 for (p = desc->args; *p; p++)
945 if (*p == '<')
946 n_args++;
947 out:
948 script_desc__delete(desc);
949
950 return n_args;
951 }
952
953 static const char * const script_usage[] = {
954 "perf script [<options>]",
955 "perf script [<options>] record <script> [<record-options>] <command>",
956 "perf script [<options>] report <script> [script-args]",
957 "perf script [<options>] <script> [<record-options>] <command>",
958 "perf script [<options>] <top-script> [script-args]",
959 NULL
960 };
961
962 static const struct option options[] = {
963 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
964 "dump raw trace in ASCII"),
965 OPT_INCR('v', "verbose", &verbose,
966 "be more verbose (show symbol address, etc)"),
967 OPT_BOOLEAN('L', "Latency", &latency_format,
968 "show latency attributes (irqs/preemption disabled, etc)"),
969 OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
970 list_available_scripts),
971 OPT_CALLBACK('s', "script", NULL, "name",
972 "script file name (lang:script name, script name, or *)",
973 parse_scriptname),
974 OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
975 "generate perf-script.xx script in specified language"),
976 OPT_STRING('i', "input", &input_name, "file",
977 "input file name"),
978 OPT_BOOLEAN('d', "debug-mode", &debug_mode,
979 "do various checks like samples ordering and lost events"),
980 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
981 "file", "vmlinux pathname"),
982 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
983 "file", "kallsyms pathname"),
984 OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
985 "When printing symbols do not display call chain"),
986 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
987 "Look for files with symbols relative to this directory"),
988 OPT_CALLBACK('f', "fields", NULL, "str",
989 "comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,cpu,event,trace,sym",
990 parse_output_fields),
991
992 OPT_END()
993 };
994
995 static bool have_cmd(int argc, const char **argv)
996 {
997 char **__argv = malloc(sizeof(const char *) * argc);
998
999 if (!__argv)
1000 die("malloc");
1001 memcpy(__argv, argv, sizeof(const char *) * argc);
1002 argc = parse_options(argc, (const char **)__argv, record_options,
1003 NULL, PARSE_OPT_STOP_AT_NON_OPTION);
1004 free(__argv);
1005
1006 return argc != 0;
1007 }
1008
1009 int cmd_script(int argc, const char **argv, const char *prefix __used)
1010 {
1011 char *rec_script_path = NULL;
1012 char *rep_script_path = NULL;
1013 struct perf_session *session;
1014 char *script_path = NULL;
1015 const char **__argv;
1016 bool system_wide;
1017 int i, j, err;
1018
1019 setup_scripting();
1020
1021 argc = parse_options(argc, argv, options, script_usage,
1022 PARSE_OPT_STOP_AT_NON_OPTION);
1023
1024 if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
1025 rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
1026 if (!rec_script_path)
1027 return cmd_record(argc, argv, NULL);
1028 }
1029
1030 if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
1031 rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
1032 if (!rep_script_path) {
1033 fprintf(stderr,
1034 "Please specify a valid report script"
1035 "(see 'perf script -l' for listing)\n");
1036 return -1;
1037 }
1038 }
1039
1040 /* make sure PERF_EXEC_PATH is set for scripts */
1041 perf_set_argv_exec_path(perf_exec_path());
1042
1043 if (argc && !script_name && !rec_script_path && !rep_script_path) {
1044 int live_pipe[2];
1045 int rep_args;
1046 pid_t pid;
1047
1048 rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
1049 rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
1050
1051 if (!rec_script_path && !rep_script_path) {
1052 fprintf(stderr, " Couldn't find script %s\n\n See perf"
1053 " script -l for available scripts.\n", argv[0]);
1054 usage_with_options(script_usage, options);
1055 }
1056
1057 if (is_top_script(argv[0])) {
1058 rep_args = argc - 1;
1059 } else {
1060 int rec_args;
1061
1062 rep_args = has_required_arg(rep_script_path);
1063 rec_args = (argc - 1) - rep_args;
1064 if (rec_args < 0) {
1065 fprintf(stderr, " %s script requires options."
1066 "\n\n See perf script -l for available "
1067 "scripts and options.\n", argv[0]);
1068 usage_with_options(script_usage, options);
1069 }
1070 }
1071
1072 if (pipe(live_pipe) < 0) {
1073 perror("failed to create pipe");
1074 exit(-1);
1075 }
1076
1077 pid = fork();
1078 if (pid < 0) {
1079 perror("failed to fork");
1080 exit(-1);
1081 }
1082
1083 if (!pid) {
1084 system_wide = true;
1085 j = 0;
1086
1087 dup2(live_pipe[1], 1);
1088 close(live_pipe[0]);
1089
1090 if (!is_top_script(argv[0]))
1091 system_wide = !have_cmd(argc - rep_args,
1092 &argv[rep_args]);
1093
1094 __argv = malloc((argc + 6) * sizeof(const char *));
1095 if (!__argv)
1096 die("malloc");
1097
1098 __argv[j++] = "/bin/sh";
1099 __argv[j++] = rec_script_path;
1100 if (system_wide)
1101 __argv[j++] = "-a";
1102 __argv[j++] = "-q";
1103 __argv[j++] = "-o";
1104 __argv[j++] = "-";
1105 for (i = rep_args + 1; i < argc; i++)
1106 __argv[j++] = argv[i];
1107 __argv[j++] = NULL;
1108
1109 execvp("/bin/sh", (char **)__argv);
1110 free(__argv);
1111 exit(-1);
1112 }
1113
1114 dup2(live_pipe[0], 0);
1115 close(live_pipe[1]);
1116
1117 __argv = malloc((argc + 4) * sizeof(const char *));
1118 if (!__argv)
1119 die("malloc");
1120 j = 0;
1121 __argv[j++] = "/bin/sh";
1122 __argv[j++] = rep_script_path;
1123 for (i = 1; i < rep_args + 1; i++)
1124 __argv[j++] = argv[i];
1125 __argv[j++] = "-i";
1126 __argv[j++] = "-";
1127 __argv[j++] = NULL;
1128
1129 execvp("/bin/sh", (char **)__argv);
1130 free(__argv);
1131 exit(-1);
1132 }
1133
1134 if (rec_script_path)
1135 script_path = rec_script_path;
1136 if (rep_script_path)
1137 script_path = rep_script_path;
1138
1139 if (script_path) {
1140 system_wide = false;
1141 j = 0;
1142
1143 if (rec_script_path)
1144 system_wide = !have_cmd(argc - 1, &argv[1]);
1145
1146 __argv = malloc((argc + 2) * sizeof(const char *));
1147 if (!__argv)
1148 die("malloc");
1149 __argv[j++] = "/bin/sh";
1150 __argv[j++] = script_path;
1151 if (system_wide)
1152 __argv[j++] = "-a";
1153 for (i = 2; i < argc; i++)
1154 __argv[j++] = argv[i];
1155 __argv[j++] = NULL;
1156
1157 execvp("/bin/sh", (char **)__argv);
1158 free(__argv);
1159 exit(-1);
1160 }
1161
1162 if (symbol__init() < 0)
1163 return -1;
1164 if (!script_name)
1165 setup_pager();
1166
1167 session = perf_session__new(input_name, O_RDONLY, 0, false, &event_ops);
1168 if (session == NULL)
1169 return -ENOMEM;
1170
1171 if (!no_callchain)
1172 symbol_conf.use_callchain = true;
1173 else
1174 symbol_conf.use_callchain = false;
1175
1176 if (generate_script_lang) {
1177 struct stat perf_stat;
1178 int input;
1179
1180 if (output_set_by_user()) {
1181 fprintf(stderr,
1182 "custom fields not supported for generated scripts");
1183 return -1;
1184 }
1185
1186 input = open(input_name, O_RDONLY);
1187 if (input < 0) {
1188 perror("failed to open file");
1189 exit(-1);
1190 }
1191
1192 err = fstat(input, &perf_stat);
1193 if (err < 0) {
1194 perror("failed to stat file");
1195 exit(-1);
1196 }
1197
1198 if (!perf_stat.st_size) {
1199 fprintf(stderr, "zero-sized file, nothing to do!\n");
1200 exit(0);
1201 }
1202
1203 scripting_ops = script_spec__lookup(generate_script_lang);
1204 if (!scripting_ops) {
1205 fprintf(stderr, "invalid language specifier");
1206 return -1;
1207 }
1208
1209 err = scripting_ops->generate_script("perf-script");
1210 goto out;
1211 }
1212
1213 if (script_name) {
1214 err = scripting_ops->start_script(script_name, argc, argv);
1215 if (err)
1216 goto out;
1217 pr_debug("perf script started with script %s\n\n", script_name);
1218 }
1219
1220
1221 err = perf_session__check_output_opt(session);
1222 if (err < 0)
1223 goto out;
1224
1225 err = __cmd_script(session);
1226
1227 perf_session__delete(session);
1228 cleanup_scripting();
1229 out:
1230 return err;
1231 }
Linux kernel - Deliverables
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