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Merge tag 'sound-3.8' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
[karo-tx-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_exit,
524         .fork            = perf_event__process_fork,
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  * Some scripts specify the required events in their "xxx-record" file,
1034  * this function will check if the events in perf.data match those
1035  * mentioned in the "xxx-record".
1036  *
1037  * Fixme: All existing "xxx-record" are all in good formats "-e event ",
1038  * which is covered well now. And new parsing code should be added to
1039  * cover the future complexing formats like event groups etc.
1040  */
1041 static int check_ev_match(char *dir_name, char *scriptname,
1042                         struct perf_session *session)
1043 {
1044         char filename[MAXPATHLEN], evname[128];
1045         char line[BUFSIZ], *p;
1046         struct perf_evsel *pos;
1047         int match, len;
1048         FILE *fp;
1049
1050         sprintf(filename, "%s/bin/%s-record", dir_name, scriptname);
1051
1052         fp = fopen(filename, "r");
1053         if (!fp)
1054                 return -1;
1055
1056         while (fgets(line, sizeof(line), fp)) {
1057                 p = ltrim(line);
1058                 if (*p == '#')
1059                         continue;
1060
1061                 while (strlen(p)) {
1062                         p = strstr(p, "-e");
1063                         if (!p)
1064                                 break;
1065
1066                         p += 2;
1067                         p = ltrim(p);
1068                         len = strcspn(p, " \t");
1069                         if (!len)
1070                                 break;
1071
1072                         snprintf(evname, len + 1, "%s", p);
1073
1074                         match = 0;
1075                         list_for_each_entry(pos,
1076                                         &session->evlist->entries, node) {
1077                                 if (!strcmp(perf_evsel__name(pos), evname)) {
1078                                         match = 1;
1079                                         break;
1080                                 }
1081                         }
1082
1083                         if (!match) {
1084                                 fclose(fp);
1085                                 return -1;
1086                         }
1087                 }
1088         }
1089
1090         fclose(fp);
1091         return 0;
1092 }
1093
1094 /*
1095  * Return -1 if none is found, otherwise the actual scripts number.
1096  *
1097  * Currently the only user of this function is the script browser, which
1098  * will list all statically runnable scripts, select one, execute it and
1099  * show the output in a perf browser.
1100  */
1101 int find_scripts(char **scripts_array, char **scripts_path_array)
1102 {
1103         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
1104         char scripts_path[MAXPATHLEN], lang_path[MAXPATHLEN];
1105         DIR *scripts_dir, *lang_dir;
1106         struct perf_session *session;
1107         char *temp;
1108         int i = 0;
1109
1110         session = perf_session__new(input_name, O_RDONLY, 0, false, NULL);
1111         if (!session)
1112                 return -1;
1113
1114         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1115
1116         scripts_dir = opendir(scripts_path);
1117         if (!scripts_dir) {
1118                 perf_session__delete(session);
1119                 return -1;
1120         }
1121
1122         for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1123                 snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
1124                          lang_dirent.d_name);
1125 #ifdef NO_LIBPERL
1126                 if (strstr(lang_path, "perl"))
1127                         continue;
1128 #endif
1129 #ifdef NO_LIBPYTHON
1130                 if (strstr(lang_path, "python"))
1131                         continue;
1132 #endif
1133
1134                 lang_dir = opendir(lang_path);
1135                 if (!lang_dir)
1136                         continue;
1137
1138                 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1139                         /* Skip those real time scripts: xxxtop.p[yl] */
1140                         if (strstr(script_dirent.d_name, "top."))
1141                                 continue;
1142                         sprintf(scripts_path_array[i], "%s/%s", lang_path,
1143                                 script_dirent.d_name);
1144                         temp = strchr(script_dirent.d_name, '.');
1145                         snprintf(scripts_array[i],
1146                                 (temp - script_dirent.d_name) + 1,
1147                                 "%s", script_dirent.d_name);
1148
1149                         if (check_ev_match(lang_path,
1150                                         scripts_array[i], session))
1151                                 continue;
1152
1153                         i++;
1154                 }
1155                 closedir(lang_dir);
1156         }
1157
1158         closedir(scripts_dir);
1159         perf_session__delete(session);
1160         return i;
1161 }
1162
1163 static char *get_script_path(const char *script_root, const char *suffix)
1164 {
1165         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
1166         char scripts_path[MAXPATHLEN];
1167         char script_path[MAXPATHLEN];
1168         DIR *scripts_dir, *lang_dir;
1169         char lang_path[MAXPATHLEN];
1170         char *__script_root;
1171
1172         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1173
1174         scripts_dir = opendir(scripts_path);
1175         if (!scripts_dir)
1176                 return NULL;
1177
1178         for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1179                 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1180                          lang_dirent.d_name);
1181                 lang_dir = opendir(lang_path);
1182                 if (!lang_dir)
1183                         continue;
1184
1185                 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1186                         __script_root = get_script_root(&script_dirent, suffix);
1187                         if (__script_root && !strcmp(script_root, __script_root)) {
1188                                 free(__script_root);
1189                                 closedir(lang_dir);
1190                                 closedir(scripts_dir);
1191                                 snprintf(script_path, MAXPATHLEN, "%s/%s",
1192                                          lang_path, script_dirent.d_name);
1193                                 return strdup(script_path);
1194                         }
1195                         free(__script_root);
1196                 }
1197                 closedir(lang_dir);
1198         }
1199         closedir(scripts_dir);
1200
1201         return NULL;
1202 }
1203
1204 static bool is_top_script(const char *script_path)
1205 {
1206         return ends_with(script_path, "top") == NULL ? false : true;
1207 }
1208
1209 static int has_required_arg(char *script_path)
1210 {
1211         struct script_desc *desc;
1212         int n_args = 0;
1213         char *p;
1214
1215         desc = script_desc__new(NULL);
1216
1217         if (read_script_info(desc, script_path))
1218                 goto out;
1219
1220         if (!desc->args)
1221                 goto out;
1222
1223         for (p = desc->args; *p; p++)
1224                 if (*p == '<')
1225                         n_args++;
1226 out:
1227         script_desc__delete(desc);
1228
1229         return n_args;
1230 }
1231
1232 static int have_cmd(int argc, const char **argv)
1233 {
1234         char **__argv = malloc(sizeof(const char *) * argc);
1235
1236         if (!__argv) {
1237                 pr_err("malloc failed\n");
1238                 return -1;
1239         }
1240
1241         memcpy(__argv, argv, sizeof(const char *) * argc);
1242         argc = parse_options(argc, (const char **)__argv, record_options,
1243                              NULL, PARSE_OPT_STOP_AT_NON_OPTION);
1244         free(__argv);
1245
1246         system_wide = (argc == 0);
1247
1248         return 0;
1249 }
1250
1251 int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
1252 {
1253         bool show_full_info = false;
1254         char *rec_script_path = NULL;
1255         char *rep_script_path = NULL;
1256         struct perf_session *session;
1257         char *script_path = NULL;
1258         const char **__argv;
1259         int i, j, err;
1260         const struct option options[] = {
1261         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1262                     "dump raw trace in ASCII"),
1263         OPT_INCR('v', "verbose", &verbose,
1264                  "be more verbose (show symbol address, etc)"),
1265         OPT_BOOLEAN('L', "Latency", &latency_format,
1266                     "show latency attributes (irqs/preemption disabled, etc)"),
1267         OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
1268                            list_available_scripts),
1269         OPT_CALLBACK('s', "script", NULL, "name",
1270                      "script file name (lang:script name, script name, or *)",
1271                      parse_scriptname),
1272         OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
1273                    "generate perf-script.xx script in specified language"),
1274         OPT_STRING('i', "input", &input_name, "file", "input file name"),
1275         OPT_BOOLEAN('d', "debug-mode", &debug_mode,
1276                    "do various checks like samples ordering and lost events"),
1277         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1278                    "file", "vmlinux pathname"),
1279         OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1280                    "file", "kallsyms pathname"),
1281         OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
1282                     "When printing symbols do not display call chain"),
1283         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1284                     "Look for files with symbols relative to this directory"),
1285         OPT_CALLBACK('f', "fields", NULL, "str",
1286                      "comma separated output fields prepend with 'type:'. "
1287                      "Valid types: hw,sw,trace,raw. "
1288                      "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
1289                      "addr,symoff", parse_output_fields),
1290         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1291                     "system-wide collection from all CPUs"),
1292         OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1293                    "only consider these symbols"),
1294         OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1295         OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1296                    "only display events for these comms"),
1297         OPT_BOOLEAN('I', "show-info", &show_full_info,
1298                     "display extended information from perf.data file"),
1299         OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
1300                     "Show the path of [kernel.kallsyms]"),
1301         OPT_END()
1302         };
1303         const char * const script_usage[] = {
1304                 "perf script [<options>]",
1305                 "perf script [<options>] record <script> [<record-options>] <command>",
1306                 "perf script [<options>] report <script> [script-args]",
1307                 "perf script [<options>] <script> [<record-options>] <command>",
1308                 "perf script [<options>] <top-script> [script-args]",
1309                 NULL
1310         };
1311
1312         setup_scripting();
1313
1314         argc = parse_options(argc, argv, options, script_usage,
1315                              PARSE_OPT_STOP_AT_NON_OPTION);
1316
1317         if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
1318                 rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
1319                 if (!rec_script_path)
1320                         return cmd_record(argc, argv, NULL);
1321         }
1322
1323         if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
1324                 rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
1325                 if (!rep_script_path) {
1326                         fprintf(stderr,
1327                                 "Please specify a valid report script"
1328                                 "(see 'perf script -l' for listing)\n");
1329                         return -1;
1330                 }
1331         }
1332
1333         /* make sure PERF_EXEC_PATH is set for scripts */
1334         perf_set_argv_exec_path(perf_exec_path());
1335
1336         if (argc && !script_name && !rec_script_path && !rep_script_path) {
1337                 int live_pipe[2];
1338                 int rep_args;
1339                 pid_t pid;
1340
1341                 rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
1342                 rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
1343
1344                 if (!rec_script_path && !rep_script_path) {
1345                         fprintf(stderr, " Couldn't find script %s\n\n See perf"
1346                                 " script -l for available scripts.\n", argv[0]);
1347                         usage_with_options(script_usage, options);
1348                 }
1349
1350                 if (is_top_script(argv[0])) {
1351                         rep_args = argc - 1;
1352                 } else {
1353                         int rec_args;
1354
1355                         rep_args = has_required_arg(rep_script_path);
1356                         rec_args = (argc - 1) - rep_args;
1357                         if (rec_args < 0) {
1358                                 fprintf(stderr, " %s script requires options."
1359                                         "\n\n See perf script -l for available "
1360                                         "scripts and options.\n", argv[0]);
1361                                 usage_with_options(script_usage, options);
1362                         }
1363                 }
1364
1365                 if (pipe(live_pipe) < 0) {
1366                         perror("failed to create pipe");
1367                         return -1;
1368                 }
1369
1370                 pid = fork();
1371                 if (pid < 0) {
1372                         perror("failed to fork");
1373                         return -1;
1374                 }
1375
1376                 if (!pid) {
1377                         j = 0;
1378
1379                         dup2(live_pipe[1], 1);
1380                         close(live_pipe[0]);
1381
1382                         if (is_top_script(argv[0])) {
1383                                 system_wide = true;
1384                         } else if (!system_wide) {
1385                                 if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
1386                                         err = -1;
1387                                         goto out;
1388                                 }
1389                         }
1390
1391                         __argv = malloc((argc + 6) * sizeof(const char *));
1392                         if (!__argv) {
1393                                 pr_err("malloc failed\n");
1394                                 err = -ENOMEM;
1395                                 goto out;
1396                         }
1397
1398                         __argv[j++] = "/bin/sh";
1399                         __argv[j++] = rec_script_path;
1400                         if (system_wide)
1401                                 __argv[j++] = "-a";
1402                         __argv[j++] = "-q";
1403                         __argv[j++] = "-o";
1404                         __argv[j++] = "-";
1405                         for (i = rep_args + 1; i < argc; i++)
1406                                 __argv[j++] = argv[i];
1407                         __argv[j++] = NULL;
1408
1409                         execvp("/bin/sh", (char **)__argv);
1410                         free(__argv);
1411                         exit(-1);
1412                 }
1413
1414                 dup2(live_pipe[0], 0);
1415                 close(live_pipe[1]);
1416
1417                 __argv = malloc((argc + 4) * sizeof(const char *));
1418                 if (!__argv) {
1419                         pr_err("malloc failed\n");
1420                         err = -ENOMEM;
1421                         goto out;
1422                 }
1423
1424                 j = 0;
1425                 __argv[j++] = "/bin/sh";
1426                 __argv[j++] = rep_script_path;
1427                 for (i = 1; i < rep_args + 1; i++)
1428                         __argv[j++] = argv[i];
1429                 __argv[j++] = "-i";
1430                 __argv[j++] = "-";
1431                 __argv[j++] = NULL;
1432
1433                 execvp("/bin/sh", (char **)__argv);
1434                 free(__argv);
1435                 exit(-1);
1436         }
1437
1438         if (rec_script_path)
1439                 script_path = rec_script_path;
1440         if (rep_script_path)
1441                 script_path = rep_script_path;
1442
1443         if (script_path) {
1444                 j = 0;
1445
1446                 if (!rec_script_path)
1447                         system_wide = false;
1448                 else if (!system_wide) {
1449                         if (have_cmd(argc - 1, &argv[1]) != 0) {
1450                                 err = -1;
1451                                 goto out;
1452                         }
1453                 }
1454
1455                 __argv = malloc((argc + 2) * sizeof(const char *));
1456                 if (!__argv) {
1457                         pr_err("malloc failed\n");
1458                         err = -ENOMEM;
1459                         goto out;
1460                 }
1461
1462                 __argv[j++] = "/bin/sh";
1463                 __argv[j++] = script_path;
1464                 if (system_wide)
1465                         __argv[j++] = "-a";
1466                 for (i = 2; i < argc; i++)
1467                         __argv[j++] = argv[i];
1468                 __argv[j++] = NULL;
1469
1470                 execvp("/bin/sh", (char **)__argv);
1471                 free(__argv);
1472                 exit(-1);
1473         }
1474
1475         if (symbol__init() < 0)
1476                 return -1;
1477         if (!script_name)
1478                 setup_pager();
1479
1480         session = perf_session__new(input_name, O_RDONLY, 0, false,
1481                                     &perf_script);
1482         if (session == NULL)
1483                 return -ENOMEM;
1484
1485         if (cpu_list) {
1486                 if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
1487                         return -1;
1488         }
1489
1490         perf_session__fprintf_info(session, stdout, show_full_info);
1491
1492         if (!no_callchain)
1493                 symbol_conf.use_callchain = true;
1494         else
1495                 symbol_conf.use_callchain = false;
1496
1497         if (generate_script_lang) {
1498                 struct stat perf_stat;
1499                 int input;
1500
1501                 if (output_set_by_user()) {
1502                         fprintf(stderr,
1503                                 "custom fields not supported for generated scripts");
1504                         return -1;
1505                 }
1506
1507                 input = open(session->filename, O_RDONLY);      /* input_name */
1508                 if (input < 0) {
1509                         perror("failed to open file");
1510                         return -1;
1511                 }
1512
1513                 err = fstat(input, &perf_stat);
1514                 if (err < 0) {
1515                         perror("failed to stat file");
1516                         return -1;
1517                 }
1518
1519                 if (!perf_stat.st_size) {
1520                         fprintf(stderr, "zero-sized file, nothing to do!\n");
1521                         return 0;
1522                 }
1523
1524                 scripting_ops = script_spec__lookup(generate_script_lang);
1525                 if (!scripting_ops) {
1526                         fprintf(stderr, "invalid language specifier");
1527                         return -1;
1528                 }
1529
1530                 err = scripting_ops->generate_script(session->pevent,
1531                                                      "perf-script");
1532                 goto out;
1533         }
1534
1535         if (script_name) {
1536                 err = scripting_ops->start_script(script_name, argc, argv);
1537                 if (err)
1538                         goto out;
1539                 pr_debug("perf script started with script %s\n\n", script_name);
1540         }
1541
1542
1543         err = perf_session__check_output_opt(session);
1544         if (err < 0)
1545                 goto out;
1546
1547         err = __cmd_script(session);
1548
1549         perf_session__delete(session);
1550         cleanup_scripting();
1551 out:
1552         return err;
1553 }