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Merge tag 'jfs-3.12' of git://github.com/kleikamp/linux-shaggy
[mirror_ubuntu-eoan-kernel.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 latency_format;
28 static bool system_wide;
29 static const char *cpu_list;
30 static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
31
32 enum perf_output_field {
33 PERF_OUTPUT_COMM = 1U << 0,
34 PERF_OUTPUT_TID = 1U << 1,
35 PERF_OUTPUT_PID = 1U << 2,
36 PERF_OUTPUT_TIME = 1U << 3,
37 PERF_OUTPUT_CPU = 1U << 4,
38 PERF_OUTPUT_EVNAME = 1U << 5,
39 PERF_OUTPUT_TRACE = 1U << 6,
40 PERF_OUTPUT_IP = 1U << 7,
41 PERF_OUTPUT_SYM = 1U << 8,
42 PERF_OUTPUT_DSO = 1U << 9,
43 PERF_OUTPUT_ADDR = 1U << 10,
44 PERF_OUTPUT_SYMOFFSET = 1U << 11,
45 };
46
47 struct output_option {
48 const char *str;
49 enum perf_output_field field;
50 } all_output_options[] = {
51 {.str = "comm", .field = PERF_OUTPUT_COMM},
52 {.str = "tid", .field = PERF_OUTPUT_TID},
53 {.str = "pid", .field = PERF_OUTPUT_PID},
54 {.str = "time", .field = PERF_OUTPUT_TIME},
55 {.str = "cpu", .field = PERF_OUTPUT_CPU},
56 {.str = "event", .field = PERF_OUTPUT_EVNAME},
57 {.str = "trace", .field = PERF_OUTPUT_TRACE},
58 {.str = "ip", .field = PERF_OUTPUT_IP},
59 {.str = "sym", .field = PERF_OUTPUT_SYM},
60 {.str = "dso", .field = PERF_OUTPUT_DSO},
61 {.str = "addr", .field = PERF_OUTPUT_ADDR},
62 {.str = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
63 };
64
65 /* default set to maintain compatibility with current format */
66 static struct {
67 bool user_set;
68 bool wildcard_set;
69 unsigned int print_ip_opts;
70 u64 fields;
71 u64 invalid_fields;
72 } output[PERF_TYPE_MAX] = {
73
74 [PERF_TYPE_HARDWARE] = {
75 .user_set = false,
76
77 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
78 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
79 PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
80 PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
81
82 .invalid_fields = PERF_OUTPUT_TRACE,
83 },
84
85 [PERF_TYPE_SOFTWARE] = {
86 .user_set = false,
87
88 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
89 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
90 PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
91 PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
92
93 .invalid_fields = PERF_OUTPUT_TRACE,
94 },
95
96 [PERF_TYPE_TRACEPOINT] = {
97 .user_set = false,
98
99 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
100 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
101 PERF_OUTPUT_EVNAME | PERF_OUTPUT_TRACE,
102 },
103
104 [PERF_TYPE_RAW] = {
105 .user_set = false,
106
107 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
108 PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
109 PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
110 PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
111
112 .invalid_fields = PERF_OUTPUT_TRACE,
113 },
114 };
115
116 static bool output_set_by_user(void)
117 {
118 int j;
119 for (j = 0; j < PERF_TYPE_MAX; ++j) {
120 if (output[j].user_set)
121 return true;
122 }
123 return false;
124 }
125
126 static const char *output_field2str(enum perf_output_field field)
127 {
128 int i, imax = ARRAY_SIZE(all_output_options);
129 const char *str = "";
130
131 for (i = 0; i < imax; ++i) {
132 if (all_output_options[i].field == field) {
133 str = all_output_options[i].str;
134 break;
135 }
136 }
137 return str;
138 }
139
140 #define PRINT_FIELD(x) (output[attr->type].fields & PERF_OUTPUT_##x)
141
142 static int perf_evsel__check_stype(struct perf_evsel *evsel,
143 u64 sample_type, const char *sample_msg,
144 enum perf_output_field field)
145 {
146 struct perf_event_attr *attr = &evsel->attr;
147 int type = attr->type;
148 const char *evname;
149
150 if (attr->sample_type & sample_type)
151 return 0;
152
153 if (output[type].user_set) {
154 evname = perf_evsel__name(evsel);
155 pr_err("Samples for '%s' event do not have %s attribute set. "
156 "Cannot print '%s' field.\n",
157 evname, sample_msg, output_field2str(field));
158 return -1;
159 }
160
161 /* user did not ask for it explicitly so remove from the default list */
162 output[type].fields &= ~field;
163 evname = perf_evsel__name(evsel);
164 pr_debug("Samples for '%s' event do not have %s attribute set. "
165 "Skipping '%s' field.\n",
166 evname, sample_msg, output_field2str(field));
167
168 return 0;
169 }
170
171 static int perf_evsel__check_attr(struct perf_evsel *evsel,
172 struct perf_session *session)
173 {
174 struct perf_event_attr *attr = &evsel->attr;
175
176 if (PRINT_FIELD(TRACE) &&
177 !perf_session__has_traces(session, "record -R"))
178 return -EINVAL;
179
180 if (PRINT_FIELD(IP)) {
181 if (perf_evsel__check_stype(evsel, PERF_SAMPLE_IP, "IP",
182 PERF_OUTPUT_IP))
183 return -EINVAL;
184
185 if (!no_callchain &&
186 !(attr->sample_type & PERF_SAMPLE_CALLCHAIN))
187 symbol_conf.use_callchain = false;
188 }
189
190 if (PRINT_FIELD(ADDR) &&
191 perf_evsel__check_stype(evsel, PERF_SAMPLE_ADDR, "ADDR",
192 PERF_OUTPUT_ADDR))
193 return -EINVAL;
194
195 if (PRINT_FIELD(SYM) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
196 pr_err("Display of symbols requested but neither sample IP nor "
197 "sample address\nis selected. Hence, no addresses to convert "
198 "to symbols.\n");
199 return -EINVAL;
200 }
201 if (PRINT_FIELD(SYMOFFSET) && !PRINT_FIELD(SYM)) {
202 pr_err("Display of offsets requested but symbol is not"
203 "selected.\n");
204 return -EINVAL;
205 }
206 if (PRINT_FIELD(DSO) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
207 pr_err("Display of DSO requested but neither sample IP nor "
208 "sample address\nis selected. Hence, no addresses to convert "
209 "to DSO.\n");
210 return -EINVAL;
211 }
212
213 if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
214 perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID",
215 PERF_OUTPUT_TID|PERF_OUTPUT_PID))
216 return -EINVAL;
217
218 if (PRINT_FIELD(TIME) &&
219 perf_evsel__check_stype(evsel, PERF_SAMPLE_TIME, "TIME",
220 PERF_OUTPUT_TIME))
221 return -EINVAL;
222
223 if (PRINT_FIELD(CPU) &&
224 perf_evsel__check_stype(evsel, PERF_SAMPLE_CPU, "CPU",
225 PERF_OUTPUT_CPU))
226 return -EINVAL;
227
228 return 0;
229 }
230
231 /*
232 * verify all user requested events exist and the samples
233 * have the expected data
234 */
235 static int perf_session__check_output_opt(struct perf_session *session)
236 {
237 int j;
238 struct perf_evsel *evsel;
239 struct perf_event_attr *attr;
240
241 for (j = 0; j < PERF_TYPE_MAX; ++j) {
242 evsel = perf_session__find_first_evtype(session, j);
243
244 /*
245 * even if fields is set to 0 (ie., show nothing) event must
246 * exist if user explicitly includes it on the command line
247 */
248 if (!evsel && output[j].user_set && !output[j].wildcard_set) {
249 pr_err("%s events do not exist. "
250 "Remove corresponding -f option to proceed.\n",
251 event_type(j));
252 return -1;
253 }
254
255 if (evsel && output[j].fields &&
256 perf_evsel__check_attr(evsel, session))
257 return -1;
258
259 if (evsel == NULL)
260 continue;
261
262 attr = &evsel->attr;
263
264 output[j].print_ip_opts = 0;
265 if (PRINT_FIELD(IP))
266 output[j].print_ip_opts |= PRINT_IP_OPT_IP;
267
268 if (PRINT_FIELD(SYM))
269 output[j].print_ip_opts |= PRINT_IP_OPT_SYM;
270
271 if (PRINT_FIELD(DSO))
272 output[j].print_ip_opts |= PRINT_IP_OPT_DSO;
273
274 if (PRINT_FIELD(SYMOFFSET))
275 output[j].print_ip_opts |= PRINT_IP_OPT_SYMOFFSET;
276 }
277
278 return 0;
279 }
280
281 static void print_sample_start(struct perf_sample *sample,
282 struct thread *thread,
283 struct perf_evsel *evsel)
284 {
285 struct perf_event_attr *attr = &evsel->attr;
286 const char *evname = NULL;
287 unsigned long secs;
288 unsigned long usecs;
289 unsigned long long nsecs;
290
291 if (PRINT_FIELD(COMM)) {
292 if (latency_format)
293 printf("%8.8s ", thread->comm);
294 else if (PRINT_FIELD(IP) && symbol_conf.use_callchain)
295 printf("%s ", thread->comm);
296 else
297 printf("%16s ", thread->comm);
298 }
299
300 if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
301 printf("%5d/%-5d ", sample->pid, sample->tid);
302 else if (PRINT_FIELD(PID))
303 printf("%5d ", sample->pid);
304 else if (PRINT_FIELD(TID))
305 printf("%5d ", sample->tid);
306
307 if (PRINT_FIELD(CPU)) {
308 if (latency_format)
309 printf("%3d ", sample->cpu);
310 else
311 printf("[%03d] ", sample->cpu);
312 }
313
314 if (PRINT_FIELD(TIME)) {
315 nsecs = sample->time;
316 secs = nsecs / NSECS_PER_SEC;
317 nsecs -= secs * NSECS_PER_SEC;
318 usecs = nsecs / NSECS_PER_USEC;
319 printf("%5lu.%06lu: ", secs, usecs);
320 }
321
322 if (PRINT_FIELD(EVNAME)) {
323 evname = perf_evsel__name(evsel);
324 printf("%s: ", evname ? evname : "[unknown]");
325 }
326 }
327
328 static bool is_bts_event(struct perf_event_attr *attr)
329 {
330 return ((attr->type == PERF_TYPE_HARDWARE) &&
331 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
332 (attr->sample_period == 1));
333 }
334
335 static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
336 {
337 if ((attr->type == PERF_TYPE_SOFTWARE) &&
338 ((attr->config == PERF_COUNT_SW_PAGE_FAULTS) ||
339 (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN) ||
340 (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)))
341 return true;
342
343 if (is_bts_event(attr))
344 return true;
345
346 return false;
347 }
348
349 static void print_sample_addr(union perf_event *event,
350 struct perf_sample *sample,
351 struct machine *machine,
352 struct thread *thread,
353 struct perf_event_attr *attr)
354 {
355 struct addr_location al;
356 u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
357
358 printf("%16" PRIx64, sample->addr);
359
360 if (!sample_addr_correlates_sym(attr))
361 return;
362
363 thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
364 sample->addr, &al);
365 if (!al.map)
366 thread__find_addr_map(thread, machine, cpumode, MAP__VARIABLE,
367 sample->addr, &al);
368
369 al.cpu = sample->cpu;
370 al.sym = NULL;
371
372 if (al.map)
373 al.sym = map__find_symbol(al.map, al.addr, NULL);
374
375 if (PRINT_FIELD(SYM)) {
376 printf(" ");
377 if (PRINT_FIELD(SYMOFFSET))
378 symbol__fprintf_symname_offs(al.sym, &al, stdout);
379 else
380 symbol__fprintf_symname(al.sym, stdout);
381 }
382
383 if (PRINT_FIELD(DSO)) {
384 printf(" (");
385 map__fprintf_dsoname(al.map, stdout);
386 printf(")");
387 }
388 }
389
390 static void print_sample_bts(union perf_event *event,
391 struct perf_sample *sample,
392 struct perf_evsel *evsel,
393 struct machine *machine,
394 struct thread *thread)
395 {
396 struct perf_event_attr *attr = &evsel->attr;
397
398 /* print branch_from information */
399 if (PRINT_FIELD(IP)) {
400 if (!symbol_conf.use_callchain)
401 printf(" ");
402 else
403 printf("\n");
404 perf_evsel__print_ip(evsel, event, sample, machine,
405 output[attr->type].print_ip_opts,
406 PERF_MAX_STACK_DEPTH);
407 }
408
409 printf(" => ");
410
411 /* print branch_to information */
412 if (PRINT_FIELD(ADDR))
413 print_sample_addr(event, sample, machine, thread, attr);
414
415 printf("\n");
416 }
417
418 static void process_event(union perf_event *event, struct perf_sample *sample,
419 struct perf_evsel *evsel, struct machine *machine,
420 struct thread *thread,
421 struct addr_location *al __maybe_unused)
422 {
423 struct perf_event_attr *attr = &evsel->attr;
424
425 if (output[attr->type].fields == 0)
426 return;
427
428 print_sample_start(sample, thread, evsel);
429
430 if (is_bts_event(attr)) {
431 print_sample_bts(event, sample, evsel, machine, thread);
432 return;
433 }
434
435 if (PRINT_FIELD(TRACE))
436 event_format__print(evsel->tp_format, sample->cpu,
437 sample->raw_data, sample->raw_size);
438 if (PRINT_FIELD(ADDR))
439 print_sample_addr(event, sample, machine, thread, attr);
440
441 if (PRINT_FIELD(IP)) {
442 if (!symbol_conf.use_callchain)
443 printf(" ");
444 else
445 printf("\n");
446
447 perf_evsel__print_ip(evsel, event, sample, machine,
448 output[attr->type].print_ip_opts,
449 PERF_MAX_STACK_DEPTH);
450 }
451
452 printf("\n");
453 }
454
455 static int default_start_script(const char *script __maybe_unused,
456 int argc __maybe_unused,
457 const char **argv __maybe_unused)
458 {
459 return 0;
460 }
461
462 static int default_stop_script(void)
463 {
464 return 0;
465 }
466
467 static int default_generate_script(struct pevent *pevent __maybe_unused,
468 const char *outfile __maybe_unused)
469 {
470 return 0;
471 }
472
473 static struct scripting_ops default_scripting_ops = {
474 .start_script = default_start_script,
475 .stop_script = default_stop_script,
476 .process_event = process_event,
477 .generate_script = default_generate_script,
478 };
479
480 static struct scripting_ops *scripting_ops;
481
482 static void setup_scripting(void)
483 {
484 setup_perl_scripting();
485 setup_python_scripting();
486
487 scripting_ops = &default_scripting_ops;
488 }
489
490 static int cleanup_scripting(void)
491 {
492 pr_debug("\nperf script stopped\n");
493
494 return scripting_ops->stop_script();
495 }
496
497 static int process_sample_event(struct perf_tool *tool __maybe_unused,
498 union perf_event *event,
499 struct perf_sample *sample,
500 struct perf_evsel *evsel,
501 struct machine *machine)
502 {
503 struct addr_location al;
504 struct thread *thread = machine__findnew_thread(machine, sample->pid,
505 sample->tid);
506
507 if (thread == NULL) {
508 pr_debug("problem processing %d event, skipping it.\n",
509 event->header.type);
510 return -1;
511 }
512
513 if (debug_mode) {
514 if (sample->time < last_timestamp) {
515 pr_err("Samples misordered, previous: %" PRIu64
516 " this: %" PRIu64 "\n", last_timestamp,
517 sample->time);
518 nr_unordered++;
519 }
520 last_timestamp = sample->time;
521 return 0;
522 }
523
524 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
525 pr_err("problem processing %d event, skipping it.\n",
526 event->header.type);
527 return -1;
528 }
529
530 if (al.filtered)
531 return 0;
532
533 if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
534 return 0;
535
536 scripting_ops->process_event(event, sample, evsel, machine, thread, &al);
537
538 evsel->hists.stats.total_period += sample->period;
539 return 0;
540 }
541
542 static struct perf_tool perf_script = {
543 .sample = process_sample_event,
544 .mmap = perf_event__process_mmap,
545 .mmap2 = perf_event__process_mmap2,
546 .comm = perf_event__process_comm,
547 .exit = perf_event__process_exit,
548 .fork = perf_event__process_fork,
549 .attr = perf_event__process_attr,
550 .tracing_data = perf_event__process_tracing_data,
551 .build_id = perf_event__process_build_id,
552 .ordered_samples = true,
553 .ordering_requires_timestamps = true,
554 };
555
556 static void sig_handler(int sig __maybe_unused)
557 {
558 session_done = 1;
559 }
560
561 static int __cmd_script(struct perf_session *session)
562 {
563 int ret;
564
565 signal(SIGINT, sig_handler);
566
567 ret = perf_session__process_events(session, &perf_script);
568
569 if (debug_mode)
570 pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
571
572 return ret;
573 }
574
575 struct script_spec {
576 struct list_head node;
577 struct scripting_ops *ops;
578 char spec[0];
579 };
580
581 static LIST_HEAD(script_specs);
582
583 static struct script_spec *script_spec__new(const char *spec,
584 struct scripting_ops *ops)
585 {
586 struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
587
588 if (s != NULL) {
589 strcpy(s->spec, spec);
590 s->ops = ops;
591 }
592
593 return s;
594 }
595
596 static void script_spec__add(struct script_spec *s)
597 {
598 list_add_tail(&s->node, &script_specs);
599 }
600
601 static struct script_spec *script_spec__find(const char *spec)
602 {
603 struct script_spec *s;
604
605 list_for_each_entry(s, &script_specs, node)
606 if (strcasecmp(s->spec, spec) == 0)
607 return s;
608 return NULL;
609 }
610
611 static struct script_spec *script_spec__findnew(const char *spec,
612 struct scripting_ops *ops)
613 {
614 struct script_spec *s = script_spec__find(spec);
615
616 if (s)
617 return s;
618
619 s = script_spec__new(spec, ops);
620 if (!s)
621 return NULL;
622
623 script_spec__add(s);
624
625 return s;
626 }
627
628 int script_spec_register(const char *spec, struct scripting_ops *ops)
629 {
630 struct script_spec *s;
631
632 s = script_spec__find(spec);
633 if (s)
634 return -1;
635
636 s = script_spec__findnew(spec, ops);
637 if (!s)
638 return -1;
639
640 return 0;
641 }
642
643 static struct scripting_ops *script_spec__lookup(const char *spec)
644 {
645 struct script_spec *s = script_spec__find(spec);
646 if (!s)
647 return NULL;
648
649 return s->ops;
650 }
651
652 static void list_available_languages(void)
653 {
654 struct script_spec *s;
655
656 fprintf(stderr, "\n");
657 fprintf(stderr, "Scripting language extensions (used in "
658 "perf script -s [spec:]script.[spec]):\n\n");
659
660 list_for_each_entry(s, &script_specs, node)
661 fprintf(stderr, " %-42s [%s]\n", s->spec, s->ops->name);
662
663 fprintf(stderr, "\n");
664 }
665
666 static int parse_scriptname(const struct option *opt __maybe_unused,
667 const char *str, int unset __maybe_unused)
668 {
669 char spec[PATH_MAX];
670 const char *script, *ext;
671 int len;
672
673 if (strcmp(str, "lang") == 0) {
674 list_available_languages();
675 exit(0);
676 }
677
678 script = strchr(str, ':');
679 if (script) {
680 len = script - str;
681 if (len >= PATH_MAX) {
682 fprintf(stderr, "invalid language specifier");
683 return -1;
684 }
685 strncpy(spec, str, len);
686 spec[len] = '\0';
687 scripting_ops = script_spec__lookup(spec);
688 if (!scripting_ops) {
689 fprintf(stderr, "invalid language specifier");
690 return -1;
691 }
692 script++;
693 } else {
694 script = str;
695 ext = strrchr(script, '.');
696 if (!ext) {
697 fprintf(stderr, "invalid script extension");
698 return -1;
699 }
700 scripting_ops = script_spec__lookup(++ext);
701 if (!scripting_ops) {
702 fprintf(stderr, "invalid script extension");
703 return -1;
704 }
705 }
706
707 script_name = strdup(script);
708
709 return 0;
710 }
711
712 static int parse_output_fields(const struct option *opt __maybe_unused,
713 const char *arg, int unset __maybe_unused)
714 {
715 char *tok;
716 int i, imax = ARRAY_SIZE(all_output_options);
717 int j;
718 int rc = 0;
719 char *str = strdup(arg);
720 int type = -1;
721
722 if (!str)
723 return -ENOMEM;
724
725 /* first word can state for which event type the user is specifying
726 * the fields. If no type exists, the specified fields apply to all
727 * event types found in the file minus the invalid fields for a type.
728 */
729 tok = strchr(str, ':');
730 if (tok) {
731 *tok = '\0';
732 tok++;
733 if (!strcmp(str, "hw"))
734 type = PERF_TYPE_HARDWARE;
735 else if (!strcmp(str, "sw"))
736 type = PERF_TYPE_SOFTWARE;
737 else if (!strcmp(str, "trace"))
738 type = PERF_TYPE_TRACEPOINT;
739 else if (!strcmp(str, "raw"))
740 type = PERF_TYPE_RAW;
741 else {
742 fprintf(stderr, "Invalid event type in field string.\n");
743 rc = -EINVAL;
744 goto out;
745 }
746
747 if (output[type].user_set)
748 pr_warning("Overriding previous field request for %s events.\n",
749 event_type(type));
750
751 output[type].fields = 0;
752 output[type].user_set = true;
753 output[type].wildcard_set = false;
754
755 } else {
756 tok = str;
757 if (strlen(str) == 0) {
758 fprintf(stderr,
759 "Cannot set fields to 'none' for all event types.\n");
760 rc = -EINVAL;
761 goto out;
762 }
763
764 if (output_set_by_user())
765 pr_warning("Overriding previous field request for all events.\n");
766
767 for (j = 0; j < PERF_TYPE_MAX; ++j) {
768 output[j].fields = 0;
769 output[j].user_set = true;
770 output[j].wildcard_set = true;
771 }
772 }
773
774 tok = strtok(tok, ",");
775 while (tok) {
776 for (i = 0; i < imax; ++i) {
777 if (strcmp(tok, all_output_options[i].str) == 0)
778 break;
779 }
780 if (i == imax) {
781 fprintf(stderr, "Invalid field requested.\n");
782 rc = -EINVAL;
783 goto out;
784 }
785
786 if (type == -1) {
787 /* add user option to all events types for
788 * which it is valid
789 */
790 for (j = 0; j < PERF_TYPE_MAX; ++j) {
791 if (output[j].invalid_fields & all_output_options[i].field) {
792 pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
793 all_output_options[i].str, event_type(j));
794 } else
795 output[j].fields |= all_output_options[i].field;
796 }
797 } else {
798 if (output[type].invalid_fields & all_output_options[i].field) {
799 fprintf(stderr, "\'%s\' not valid for %s events.\n",
800 all_output_options[i].str, event_type(type));
801
802 rc = -EINVAL;
803 goto out;
804 }
805 output[type].fields |= all_output_options[i].field;
806 }
807
808 tok = strtok(NULL, ",");
809 }
810
811 if (type >= 0) {
812 if (output[type].fields == 0) {
813 pr_debug("No fields requested for %s type. "
814 "Events will not be displayed.\n", event_type(type));
815 }
816 }
817
818 out:
819 free(str);
820 return rc;
821 }
822
823 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
824 static int is_directory(const char *base_path, const struct dirent *dent)
825 {
826 char path[PATH_MAX];
827 struct stat st;
828
829 sprintf(path, "%s/%s", base_path, dent->d_name);
830 if (stat(path, &st))
831 return 0;
832
833 return S_ISDIR(st.st_mode);
834 }
835
836 #define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
837 while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) && \
838 lang_next) \
839 if ((lang_dirent.d_type == DT_DIR || \
840 (lang_dirent.d_type == DT_UNKNOWN && \
841 is_directory(scripts_path, &lang_dirent))) && \
842 (strcmp(lang_dirent.d_name, ".")) && \
843 (strcmp(lang_dirent.d_name, "..")))
844
845 #define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
846 while (!readdir_r(lang_dir, &script_dirent, &script_next) && \
847 script_next) \
848 if (script_dirent.d_type != DT_DIR && \
849 (script_dirent.d_type != DT_UNKNOWN || \
850 !is_directory(lang_path, &script_dirent)))
851
852
853 #define RECORD_SUFFIX "-record"
854 #define REPORT_SUFFIX "-report"
855
856 struct script_desc {
857 struct list_head node;
858 char *name;
859 char *half_liner;
860 char *args;
861 };
862
863 static LIST_HEAD(script_descs);
864
865 static struct script_desc *script_desc__new(const char *name)
866 {
867 struct script_desc *s = zalloc(sizeof(*s));
868
869 if (s != NULL && name)
870 s->name = strdup(name);
871
872 return s;
873 }
874
875 static void script_desc__delete(struct script_desc *s)
876 {
877 free(s->name);
878 free(s->half_liner);
879 free(s->args);
880 free(s);
881 }
882
883 static void script_desc__add(struct script_desc *s)
884 {
885 list_add_tail(&s->node, &script_descs);
886 }
887
888 static struct script_desc *script_desc__find(const char *name)
889 {
890 struct script_desc *s;
891
892 list_for_each_entry(s, &script_descs, node)
893 if (strcasecmp(s->name, name) == 0)
894 return s;
895 return NULL;
896 }
897
898 static struct script_desc *script_desc__findnew(const char *name)
899 {
900 struct script_desc *s = script_desc__find(name);
901
902 if (s)
903 return s;
904
905 s = script_desc__new(name);
906 if (!s)
907 goto out_delete_desc;
908
909 script_desc__add(s);
910
911 return s;
912
913 out_delete_desc:
914 script_desc__delete(s);
915
916 return NULL;
917 }
918
919 static const char *ends_with(const char *str, const char *suffix)
920 {
921 size_t suffix_len = strlen(suffix);
922 const char *p = str;
923
924 if (strlen(str) > suffix_len) {
925 p = str + strlen(str) - suffix_len;
926 if (!strncmp(p, suffix, suffix_len))
927 return p;
928 }
929
930 return NULL;
931 }
932
933 static int read_script_info(struct script_desc *desc, const char *filename)
934 {
935 char line[BUFSIZ], *p;
936 FILE *fp;
937
938 fp = fopen(filename, "r");
939 if (!fp)
940 return -1;
941
942 while (fgets(line, sizeof(line), fp)) {
943 p = ltrim(line);
944 if (strlen(p) == 0)
945 continue;
946 if (*p != '#')
947 continue;
948 p++;
949 if (strlen(p) && *p == '!')
950 continue;
951
952 p = ltrim(p);
953 if (strlen(p) && p[strlen(p) - 1] == '\n')
954 p[strlen(p) - 1] = '\0';
955
956 if (!strncmp(p, "description:", strlen("description:"))) {
957 p += strlen("description:");
958 desc->half_liner = strdup(ltrim(p));
959 continue;
960 }
961
962 if (!strncmp(p, "args:", strlen("args:"))) {
963 p += strlen("args:");
964 desc->args = strdup(ltrim(p));
965 continue;
966 }
967 }
968
969 fclose(fp);
970
971 return 0;
972 }
973
974 static char *get_script_root(struct dirent *script_dirent, const char *suffix)
975 {
976 char *script_root, *str;
977
978 script_root = strdup(script_dirent->d_name);
979 if (!script_root)
980 return NULL;
981
982 str = (char *)ends_with(script_root, suffix);
983 if (!str) {
984 free(script_root);
985 return NULL;
986 }
987
988 *str = '\0';
989 return script_root;
990 }
991
992 static int list_available_scripts(const struct option *opt __maybe_unused,
993 const char *s __maybe_unused,
994 int unset __maybe_unused)
995 {
996 struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
997 char scripts_path[MAXPATHLEN];
998 DIR *scripts_dir, *lang_dir;
999 char script_path[MAXPATHLEN];
1000 char lang_path[MAXPATHLEN];
1001 struct script_desc *desc;
1002 char first_half[BUFSIZ];
1003 char *script_root;
1004
1005 snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1006
1007 scripts_dir = opendir(scripts_path);
1008 if (!scripts_dir)
1009 return -1;
1010
1011 for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1012 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1013 lang_dirent.d_name);
1014 lang_dir = opendir(lang_path);
1015 if (!lang_dir)
1016 continue;
1017
1018 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1019 script_root = get_script_root(&script_dirent, REPORT_SUFFIX);
1020 if (script_root) {
1021 desc = script_desc__findnew(script_root);
1022 snprintf(script_path, MAXPATHLEN, "%s/%s",
1023 lang_path, script_dirent.d_name);
1024 read_script_info(desc, script_path);
1025 free(script_root);
1026 }
1027 }
1028 }
1029
1030 fprintf(stdout, "List of available trace scripts:\n");
1031 list_for_each_entry(desc, &script_descs, node) {
1032 sprintf(first_half, "%s %s", desc->name,
1033 desc->args ? desc->args : "");
1034 fprintf(stdout, " %-36s %s\n", first_half,
1035 desc->half_liner ? desc->half_liner : "");
1036 }
1037
1038 exit(0);
1039 }
1040
1041 /*
1042 * Some scripts specify the required events in their "xxx-record" file,
1043 * this function will check if the events in perf.data match those
1044 * mentioned in the "xxx-record".
1045 *
1046 * Fixme: All existing "xxx-record" are all in good formats "-e event ",
1047 * which is covered well now. And new parsing code should be added to
1048 * cover the future complexing formats like event groups etc.
1049 */
1050 static int check_ev_match(char *dir_name, char *scriptname,
1051 struct perf_session *session)
1052 {
1053 char filename[MAXPATHLEN], evname[128];
1054 char line[BUFSIZ], *p;
1055 struct perf_evsel *pos;
1056 int match, len;
1057 FILE *fp;
1058
1059 sprintf(filename, "%s/bin/%s-record", dir_name, scriptname);
1060
1061 fp = fopen(filename, "r");
1062 if (!fp)
1063 return -1;
1064
1065 while (fgets(line, sizeof(line), fp)) {
1066 p = ltrim(line);
1067 if (*p == '#')
1068 continue;
1069
1070 while (strlen(p)) {
1071 p = strstr(p, "-e");
1072 if (!p)
1073 break;
1074
1075 p += 2;
1076 p = ltrim(p);
1077 len = strcspn(p, " \t");
1078 if (!len)
1079 break;
1080
1081 snprintf(evname, len + 1, "%s", p);
1082
1083 match = 0;
1084 list_for_each_entry(pos,
1085 &session->evlist->entries, node) {
1086 if (!strcmp(perf_evsel__name(pos), evname)) {
1087 match = 1;
1088 break;
1089 }
1090 }
1091
1092 if (!match) {
1093 fclose(fp);
1094 return -1;
1095 }
1096 }
1097 }
1098
1099 fclose(fp);
1100 return 0;
1101 }
1102
1103 /*
1104 * Return -1 if none is found, otherwise the actual scripts number.
1105 *
1106 * Currently the only user of this function is the script browser, which
1107 * will list all statically runnable scripts, select one, execute it and
1108 * show the output in a perf browser.
1109 */
1110 int find_scripts(char **scripts_array, char **scripts_path_array)
1111 {
1112 struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
1113 char scripts_path[MAXPATHLEN], lang_path[MAXPATHLEN];
1114 DIR *scripts_dir, *lang_dir;
1115 struct perf_session *session;
1116 char *temp;
1117 int i = 0;
1118
1119 session = perf_session__new(input_name, O_RDONLY, 0, false, NULL);
1120 if (!session)
1121 return -1;
1122
1123 snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1124
1125 scripts_dir = opendir(scripts_path);
1126 if (!scripts_dir) {
1127 perf_session__delete(session);
1128 return -1;
1129 }
1130
1131 for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1132 snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
1133 lang_dirent.d_name);
1134 #ifdef NO_LIBPERL
1135 if (strstr(lang_path, "perl"))
1136 continue;
1137 #endif
1138 #ifdef NO_LIBPYTHON
1139 if (strstr(lang_path, "python"))
1140 continue;
1141 #endif
1142
1143 lang_dir = opendir(lang_path);
1144 if (!lang_dir)
1145 continue;
1146
1147 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1148 /* Skip those real time scripts: xxxtop.p[yl] */
1149 if (strstr(script_dirent.d_name, "top."))
1150 continue;
1151 sprintf(scripts_path_array[i], "%s/%s", lang_path,
1152 script_dirent.d_name);
1153 temp = strchr(script_dirent.d_name, '.');
1154 snprintf(scripts_array[i],
1155 (temp - script_dirent.d_name) + 1,
1156 "%s", script_dirent.d_name);
1157
1158 if (check_ev_match(lang_path,
1159 scripts_array[i], session))
1160 continue;
1161
1162 i++;
1163 }
1164 closedir(lang_dir);
1165 }
1166
1167 closedir(scripts_dir);
1168 perf_session__delete(session);
1169 return i;
1170 }
1171
1172 static char *get_script_path(const char *script_root, const char *suffix)
1173 {
1174 struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
1175 char scripts_path[MAXPATHLEN];
1176 char script_path[MAXPATHLEN];
1177 DIR *scripts_dir, *lang_dir;
1178 char lang_path[MAXPATHLEN];
1179 char *__script_root;
1180
1181 snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1182
1183 scripts_dir = opendir(scripts_path);
1184 if (!scripts_dir)
1185 return NULL;
1186
1187 for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1188 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1189 lang_dirent.d_name);
1190 lang_dir = opendir(lang_path);
1191 if (!lang_dir)
1192 continue;
1193
1194 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1195 __script_root = get_script_root(&script_dirent, suffix);
1196 if (__script_root && !strcmp(script_root, __script_root)) {
1197 free(__script_root);
1198 closedir(lang_dir);
1199 closedir(scripts_dir);
1200 snprintf(script_path, MAXPATHLEN, "%s/%s",
1201 lang_path, script_dirent.d_name);
1202 return strdup(script_path);
1203 }
1204 free(__script_root);
1205 }
1206 closedir(lang_dir);
1207 }
1208 closedir(scripts_dir);
1209
1210 return NULL;
1211 }
1212
1213 static bool is_top_script(const char *script_path)
1214 {
1215 return ends_with(script_path, "top") == NULL ? false : true;
1216 }
1217
1218 static int has_required_arg(char *script_path)
1219 {
1220 struct script_desc *desc;
1221 int n_args = 0;
1222 char *p;
1223
1224 desc = script_desc__new(NULL);
1225
1226 if (read_script_info(desc, script_path))
1227 goto out;
1228
1229 if (!desc->args)
1230 goto out;
1231
1232 for (p = desc->args; *p; p++)
1233 if (*p == '<')
1234 n_args++;
1235 out:
1236 script_desc__delete(desc);
1237
1238 return n_args;
1239 }
1240
1241 static int have_cmd(int argc, const char **argv)
1242 {
1243 char **__argv = malloc(sizeof(const char *) * argc);
1244
1245 if (!__argv) {
1246 pr_err("malloc failed\n");
1247 return -1;
1248 }
1249
1250 memcpy(__argv, argv, sizeof(const char *) * argc);
1251 argc = parse_options(argc, (const char **)__argv, record_options,
1252 NULL, PARSE_OPT_STOP_AT_NON_OPTION);
1253 free(__argv);
1254
1255 system_wide = (argc == 0);
1256
1257 return 0;
1258 }
1259
1260 int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
1261 {
1262 bool show_full_info = false;
1263 char *rec_script_path = NULL;
1264 char *rep_script_path = NULL;
1265 struct perf_session *session;
1266 char *script_path = NULL;
1267 const char **__argv;
1268 int i, j, err;
1269 const struct option options[] = {
1270 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1271 "dump raw trace in ASCII"),
1272 OPT_INCR('v', "verbose", &verbose,
1273 "be more verbose (show symbol address, etc)"),
1274 OPT_BOOLEAN('L', "Latency", &latency_format,
1275 "show latency attributes (irqs/preemption disabled, etc)"),
1276 OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
1277 list_available_scripts),
1278 OPT_CALLBACK('s', "script", NULL, "name",
1279 "script file name (lang:script name, script name, or *)",
1280 parse_scriptname),
1281 OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
1282 "generate perf-script.xx script in specified language"),
1283 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1284 OPT_BOOLEAN('d', "debug-mode", &debug_mode,
1285 "do various checks like samples ordering and lost events"),
1286 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1287 "file", "vmlinux pathname"),
1288 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1289 "file", "kallsyms pathname"),
1290 OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
1291 "When printing symbols do not display call chain"),
1292 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1293 "Look for files with symbols relative to this directory"),
1294 OPT_CALLBACK('f', "fields", NULL, "str",
1295 "comma separated output fields prepend with 'type:'. "
1296 "Valid types: hw,sw,trace,raw. "
1297 "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
1298 "addr,symoff", parse_output_fields),
1299 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1300 "system-wide collection from all CPUs"),
1301 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1302 "only consider these symbols"),
1303 OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1304 OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1305 "only display events for these comms"),
1306 OPT_BOOLEAN('I', "show-info", &show_full_info,
1307 "display extended information from perf.data file"),
1308 OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
1309 "Show the path of [kernel.kallsyms]"),
1310 OPT_END()
1311 };
1312 const char * const script_usage[] = {
1313 "perf script [<options>]",
1314 "perf script [<options>] record <script> [<record-options>] <command>",
1315 "perf script [<options>] report <script> [script-args]",
1316 "perf script [<options>] <script> [<record-options>] <command>",
1317 "perf script [<options>] <top-script> [script-args]",
1318 NULL
1319 };
1320
1321 setup_scripting();
1322
1323 argc = parse_options(argc, argv, options, script_usage,
1324 PARSE_OPT_STOP_AT_NON_OPTION);
1325
1326 if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
1327 rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
1328 if (!rec_script_path)
1329 return cmd_record(argc, argv, NULL);
1330 }
1331
1332 if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
1333 rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
1334 if (!rep_script_path) {
1335 fprintf(stderr,
1336 "Please specify a valid report script"
1337 "(see 'perf script -l' for listing)\n");
1338 return -1;
1339 }
1340 }
1341
1342 /* make sure PERF_EXEC_PATH is set for scripts */
1343 perf_set_argv_exec_path(perf_exec_path());
1344
1345 if (argc && !script_name && !rec_script_path && !rep_script_path) {
1346 int live_pipe[2];
1347 int rep_args;
1348 pid_t pid;
1349
1350 rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
1351 rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
1352
1353 if (!rec_script_path && !rep_script_path) {
1354 fprintf(stderr, " Couldn't find script %s\n\n See perf"
1355 " script -l for available scripts.\n", argv[0]);
1356 usage_with_options(script_usage, options);
1357 }
1358
1359 if (is_top_script(argv[0])) {
1360 rep_args = argc - 1;
1361 } else {
1362 int rec_args;
1363
1364 rep_args = has_required_arg(rep_script_path);
1365 rec_args = (argc - 1) - rep_args;
1366 if (rec_args < 0) {
1367 fprintf(stderr, " %s script requires options."
1368 "\n\n See perf script -l for available "
1369 "scripts and options.\n", argv[0]);
1370 usage_with_options(script_usage, options);
1371 }
1372 }
1373
1374 if (pipe(live_pipe) < 0) {
1375 perror("failed to create pipe");
1376 return -1;
1377 }
1378
1379 pid = fork();
1380 if (pid < 0) {
1381 perror("failed to fork");
1382 return -1;
1383 }
1384
1385 if (!pid) {
1386 j = 0;
1387
1388 dup2(live_pipe[1], 1);
1389 close(live_pipe[0]);
1390
1391 if (is_top_script(argv[0])) {
1392 system_wide = true;
1393 } else if (!system_wide) {
1394 if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
1395 err = -1;
1396 goto out;
1397 }
1398 }
1399
1400 __argv = malloc((argc + 6) * sizeof(const char *));
1401 if (!__argv) {
1402 pr_err("malloc failed\n");
1403 err = -ENOMEM;
1404 goto out;
1405 }
1406
1407 __argv[j++] = "/bin/sh";
1408 __argv[j++] = rec_script_path;
1409 if (system_wide)
1410 __argv[j++] = "-a";
1411 __argv[j++] = "-q";
1412 __argv[j++] = "-o";
1413 __argv[j++] = "-";
1414 for (i = rep_args + 1; i < argc; i++)
1415 __argv[j++] = argv[i];
1416 __argv[j++] = NULL;
1417
1418 execvp("/bin/sh", (char **)__argv);
1419 free(__argv);
1420 exit(-1);
1421 }
1422
1423 dup2(live_pipe[0], 0);
1424 close(live_pipe[1]);
1425
1426 __argv = malloc((argc + 4) * sizeof(const char *));
1427 if (!__argv) {
1428 pr_err("malloc failed\n");
1429 err = -ENOMEM;
1430 goto out;
1431 }
1432
1433 j = 0;
1434 __argv[j++] = "/bin/sh";
1435 __argv[j++] = rep_script_path;
1436 for (i = 1; i < rep_args + 1; i++)
1437 __argv[j++] = argv[i];
1438 __argv[j++] = "-i";
1439 __argv[j++] = "-";
1440 __argv[j++] = NULL;
1441
1442 execvp("/bin/sh", (char **)__argv);
1443 free(__argv);
1444 exit(-1);
1445 }
1446
1447 if (rec_script_path)
1448 script_path = rec_script_path;
1449 if (rep_script_path)
1450 script_path = rep_script_path;
1451
1452 if (script_path) {
1453 j = 0;
1454
1455 if (!rec_script_path)
1456 system_wide = false;
1457 else if (!system_wide) {
1458 if (have_cmd(argc - 1, &argv[1]) != 0) {
1459 err = -1;
1460 goto out;
1461 }
1462 }
1463
1464 __argv = malloc((argc + 2) * sizeof(const char *));
1465 if (!__argv) {
1466 pr_err("malloc failed\n");
1467 err = -ENOMEM;
1468 goto out;
1469 }
1470
1471 __argv[j++] = "/bin/sh";
1472 __argv[j++] = script_path;
1473 if (system_wide)
1474 __argv[j++] = "-a";
1475 for (i = 2; i < argc; i++)
1476 __argv[j++] = argv[i];
1477 __argv[j++] = NULL;
1478
1479 execvp("/bin/sh", (char **)__argv);
1480 free(__argv);
1481 exit(-1);
1482 }
1483
1484 if (symbol__init() < 0)
1485 return -1;
1486 if (!script_name)
1487 setup_pager();
1488
1489 session = perf_session__new(input_name, O_RDONLY, 0, false,
1490 &perf_script);
1491 if (session == NULL)
1492 return -ENOMEM;
1493
1494 if (cpu_list) {
1495 if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
1496 return -1;
1497 }
1498
1499 if (!script_name && !generate_script_lang)
1500 perf_session__fprintf_info(session, stdout, show_full_info);
1501
1502 if (!no_callchain)
1503 symbol_conf.use_callchain = true;
1504 else
1505 symbol_conf.use_callchain = false;
1506
1507 if (generate_script_lang) {
1508 struct stat perf_stat;
1509 int input;
1510
1511 if (output_set_by_user()) {
1512 fprintf(stderr,
1513 "custom fields not supported for generated scripts");
1514 return -1;
1515 }
1516
1517 input = open(session->filename, O_RDONLY); /* input_name */
1518 if (input < 0) {
1519 perror("failed to open file");
1520 return -1;
1521 }
1522
1523 err = fstat(input, &perf_stat);
1524 if (err < 0) {
1525 perror("failed to stat file");
1526 return -1;
1527 }
1528
1529 if (!perf_stat.st_size) {
1530 fprintf(stderr, "zero-sized file, nothing to do!\n");
1531 return 0;
1532 }
1533
1534 scripting_ops = script_spec__lookup(generate_script_lang);
1535 if (!scripting_ops) {
1536 fprintf(stderr, "invalid language specifier");
1537 return -1;
1538 }
1539
1540 err = scripting_ops->generate_script(session->pevent,
1541 "perf-script");
1542 goto out;
1543 }
1544
1545 if (script_name) {
1546 err = scripting_ops->start_script(script_name, argc, argv);
1547 if (err)
1548 goto out;
1549 pr_debug("perf script started with script %s\n\n", script_name);
1550 }
1551
1552
1553 err = perf_session__check_output_opt(session);
1554 if (err < 0)
1555 goto out;
1556
1557 err = __cmd_script(session);
1558
1559 perf_session__delete(session);
1560 cleanup_scripting();
1561 out:
1562 return err;
1563 }
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