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TOMOYO Linux Cross Reference
Linux/tools/perf/builtin-script.c

Version: ~ [ linux-5.12-rc1 ] ~ [ linux-5.11.2 ] ~ [ linux-5.10.19 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.101 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.177 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.222 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.258 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.258 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 "util/data.h"
 19 #include <linux/bitmap.h>
 20 
 21 static char const               *script_name;
 22 static char const               *generate_script_lang;
 23 static bool                     debug_mode;
 24 static u64                      last_timestamp;
 25 static u64                      nr_unordered;
 26 extern const struct option      record_options[];
 27 static bool                     no_callchain;
 28 static bool                     latency_format;
 29 static bool                     system_wide;
 30 static const char               *cpu_list;
 31 static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
 32 
 33 enum perf_output_field {
 34         PERF_OUTPUT_COMM            = 1U << 0,
 35         PERF_OUTPUT_TID             = 1U << 1,
 36         PERF_OUTPUT_PID             = 1U << 2,
 37         PERF_OUTPUT_TIME            = 1U << 3,
 38         PERF_OUTPUT_CPU             = 1U << 4,
 39         PERF_OUTPUT_EVNAME          = 1U << 5,
 40         PERF_OUTPUT_TRACE           = 1U << 6,
 41         PERF_OUTPUT_IP              = 1U << 7,
 42         PERF_OUTPUT_SYM             = 1U << 8,
 43         PERF_OUTPUT_DSO             = 1U << 9,
 44         PERF_OUTPUT_ADDR            = 1U << 10,
 45         PERF_OUTPUT_SYMOFFSET       = 1U << 11,
 46         PERF_OUTPUT_SRCLINE         = 1U << 12,
 47 };
 48 
 49 struct output_option {
 50         const char *str;
 51         enum perf_output_field field;
 52 } all_output_options[] = {
 53         {.str = "comm",  .field = PERF_OUTPUT_COMM},
 54         {.str = "tid",   .field = PERF_OUTPUT_TID},
 55         {.str = "pid",   .field = PERF_OUTPUT_PID},
 56         {.str = "time",  .field = PERF_OUTPUT_TIME},
 57         {.str = "cpu",   .field = PERF_OUTPUT_CPU},
 58         {.str = "event", .field = PERF_OUTPUT_EVNAME},
 59         {.str = "trace", .field = PERF_OUTPUT_TRACE},
 60         {.str = "ip",    .field = PERF_OUTPUT_IP},
 61         {.str = "sym",   .field = PERF_OUTPUT_SYM},
 62         {.str = "dso",   .field = PERF_OUTPUT_DSO},
 63         {.str = "addr",  .field = PERF_OUTPUT_ADDR},
 64         {.str = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
 65         {.str = "srcline", .field = PERF_OUTPUT_SRCLINE},
 66 };
 67 
 68 /* default set to maintain compatibility with current format */
 69 static struct {
 70         bool user_set;
 71         bool wildcard_set;
 72         unsigned int print_ip_opts;
 73         u64 fields;
 74         u64 invalid_fields;
 75 } output[PERF_TYPE_MAX] = {
 76 
 77         [PERF_TYPE_HARDWARE] = {
 78                 .user_set = false,
 79 
 80                 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
 81                               PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
 82                               PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
 83                                   PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
 84 
 85                 .invalid_fields = PERF_OUTPUT_TRACE,
 86         },
 87 
 88         [PERF_TYPE_SOFTWARE] = {
 89                 .user_set = false,
 90 
 91                 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
 92                               PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
 93                               PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
 94                                   PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
 95 
 96                 .invalid_fields = PERF_OUTPUT_TRACE,
 97         },
 98 
 99         [PERF_TYPE_TRACEPOINT] = {
100                 .user_set = false,
101 
102                 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
103                                   PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
104                                   PERF_OUTPUT_EVNAME | PERF_OUTPUT_TRACE,
105         },
106 
107         [PERF_TYPE_RAW] = {
108                 .user_set = false,
109 
110                 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
111                               PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
112                               PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
113                                   PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
114 
115                 .invalid_fields = PERF_OUTPUT_TRACE,
116         },
117 };
118 
119 static bool output_set_by_user(void)
120 {
121         int j;
122         for (j = 0; j < PERF_TYPE_MAX; ++j) {
123                 if (output[j].user_set)
124                         return true;
125         }
126         return false;
127 }
128 
129 static const char *output_field2str(enum perf_output_field field)
130 {
131         int i, imax = ARRAY_SIZE(all_output_options);
132         const char *str = "";
133 
134         for (i = 0; i < imax; ++i) {
135                 if (all_output_options[i].field == field) {
136                         str = all_output_options[i].str;
137                         break;
138                 }
139         }
140         return str;
141 }
142 
143 #define PRINT_FIELD(x)  (output[attr->type].fields & PERF_OUTPUT_##x)
144 
145 static int perf_evsel__check_stype(struct perf_evsel *evsel,
146                                    u64 sample_type, const char *sample_msg,
147                                    enum perf_output_field field)
148 {
149         struct perf_event_attr *attr = &evsel->attr;
150         int type = attr->type;
151         const char *evname;
152 
153         if (attr->sample_type & sample_type)
154                 return 0;
155 
156         if (output[type].user_set) {
157                 evname = perf_evsel__name(evsel);
158                 pr_err("Samples for '%s' event do not have %s attribute set. "
159                        "Cannot print '%s' field.\n",
160                        evname, sample_msg, output_field2str(field));
161                 return -1;
162         }
163 
164         /* user did not ask for it explicitly so remove from the default list */
165         output[type].fields &= ~field;
166         evname = perf_evsel__name(evsel);
167         pr_debug("Samples for '%s' event do not have %s attribute set. "
168                  "Skipping '%s' field.\n",
169                  evname, sample_msg, output_field2str(field));
170 
171         return 0;
172 }
173 
174 static int perf_evsel__check_attr(struct perf_evsel *evsel,
175                                   struct perf_session *session)
176 {
177         struct perf_event_attr *attr = &evsel->attr;
178 
179         if (PRINT_FIELD(TRACE) &&
180                 !perf_session__has_traces(session, "record -R"))
181                 return -EINVAL;
182 
183         if (PRINT_FIELD(IP)) {
184                 if (perf_evsel__check_stype(evsel, PERF_SAMPLE_IP, "IP",
185                                             PERF_OUTPUT_IP))
186                         return -EINVAL;
187 
188                 if (!no_callchain &&
189                     !(attr->sample_type & PERF_SAMPLE_CALLCHAIN))
190                         symbol_conf.use_callchain = false;
191         }
192 
193         if (PRINT_FIELD(ADDR) &&
194                 perf_evsel__check_stype(evsel, PERF_SAMPLE_ADDR, "ADDR",
195                                         PERF_OUTPUT_ADDR))
196                 return -EINVAL;
197 
198         if (PRINT_FIELD(SYM) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
199                 pr_err("Display of symbols requested but neither sample IP nor "
200                            "sample address\nis selected. Hence, no addresses to convert "
201                        "to symbols.\n");
202                 return -EINVAL;
203         }
204         if (PRINT_FIELD(SYMOFFSET) && !PRINT_FIELD(SYM)) {
205                 pr_err("Display of offsets requested but symbol is not"
206                        "selected.\n");
207                 return -EINVAL;
208         }
209         if (PRINT_FIELD(DSO) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
210                 pr_err("Display of DSO requested but neither sample IP nor "
211                            "sample address\nis selected. Hence, no addresses to convert "
212                        "to DSO.\n");
213                 return -EINVAL;
214         }
215         if (PRINT_FIELD(SRCLINE) && !PRINT_FIELD(IP)) {
216                 pr_err("Display of source line number requested but sample IP is not\n"
217                        "selected. Hence, no address to lookup the source line number.\n");
218                 return -EINVAL;
219         }
220 
221         if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
222                 perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID",
223                                         PERF_OUTPUT_TID|PERF_OUTPUT_PID))
224                 return -EINVAL;
225 
226         if (PRINT_FIELD(TIME) &&
227                 perf_evsel__check_stype(evsel, PERF_SAMPLE_TIME, "TIME",
228                                         PERF_OUTPUT_TIME))
229                 return -EINVAL;
230 
231         if (PRINT_FIELD(CPU) &&
232                 perf_evsel__check_stype(evsel, PERF_SAMPLE_CPU, "CPU",
233                                         PERF_OUTPUT_CPU))
234                 return -EINVAL;
235 
236         return 0;
237 }
238 
239 static void set_print_ip_opts(struct perf_event_attr *attr)
240 {
241         unsigned int type = attr->type;
242 
243         output[type].print_ip_opts = 0;
244         if (PRINT_FIELD(IP))
245                 output[type].print_ip_opts |= PRINT_IP_OPT_IP;
246 
247         if (PRINT_FIELD(SYM))
248                 output[type].print_ip_opts |= PRINT_IP_OPT_SYM;
249 
250         if (PRINT_FIELD(DSO))
251                 output[type].print_ip_opts |= PRINT_IP_OPT_DSO;
252 
253         if (PRINT_FIELD(SYMOFFSET))
254                 output[type].print_ip_opts |= PRINT_IP_OPT_SYMOFFSET;
255 
256         if (PRINT_FIELD(SRCLINE))
257                 output[type].print_ip_opts |= PRINT_IP_OPT_SRCLINE;
258 }
259 
260 /*
261  * verify all user requested events exist and the samples
262  * have the expected data
263  */
264 static int perf_session__check_output_opt(struct perf_session *session)
265 {
266         int j;
267         struct perf_evsel *evsel;
268 
269         for (j = 0; j < PERF_TYPE_MAX; ++j) {
270                 evsel = perf_session__find_first_evtype(session, j);
271 
272                 /*
273                  * even if fields is set to 0 (ie., show nothing) event must
274                  * exist if user explicitly includes it on the command line
275                  */
276                 if (!evsel && output[j].user_set && !output[j].wildcard_set) {
277                         pr_err("%s events do not exist. "
278                                "Remove corresponding -f option to proceed.\n",
279                                event_type(j));
280                         return -1;
281                 }
282 
283                 if (evsel && output[j].fields &&
284                         perf_evsel__check_attr(evsel, session))
285                         return -1;
286 
287                 if (evsel == NULL)
288                         continue;
289 
290                 set_print_ip_opts(&evsel->attr);
291         }
292 
293         /*
294          * set default for tracepoints to print symbols only
295          * if callchains are present
296          */
297         if (symbol_conf.use_callchain &&
298             !output[PERF_TYPE_TRACEPOINT].user_set) {
299                 struct perf_event_attr *attr;
300 
301                 j = PERF_TYPE_TRACEPOINT;
302                 evsel = perf_session__find_first_evtype(session, j);
303                 if (evsel == NULL)
304                         goto out;
305 
306                 attr = &evsel->attr;
307 
308                 if (attr->sample_type & PERF_SAMPLE_CALLCHAIN) {
309                         output[j].fields |= PERF_OUTPUT_IP;
310                         output[j].fields |= PERF_OUTPUT_SYM;
311                         output[j].fields |= PERF_OUTPUT_DSO;
312                         set_print_ip_opts(attr);
313                 }
314         }
315 
316 out:
317         return 0;
318 }
319 
320 static void print_sample_start(struct perf_sample *sample,
321                                struct thread *thread,
322                                struct perf_evsel *evsel)
323 {
324         struct perf_event_attr *attr = &evsel->attr;
325         unsigned long secs;
326         unsigned long usecs;
327         unsigned long long nsecs;
328 
329         if (PRINT_FIELD(COMM)) {
330                 if (latency_format)
331                         printf("%8.8s ", thread__comm_str(thread));
332                 else if (PRINT_FIELD(IP) && symbol_conf.use_callchain)
333                         printf("%s ", thread__comm_str(thread));
334                 else
335                         printf("%16s ", thread__comm_str(thread));
336         }
337 
338         if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
339                 printf("%5d/%-5d ", sample->pid, sample->tid);
340         else if (PRINT_FIELD(PID))
341                 printf("%5d ", sample->pid);
342         else if (PRINT_FIELD(TID))
343                 printf("%5d ", sample->tid);
344 
345         if (PRINT_FIELD(CPU)) {
346                 if (latency_format)
347                         printf("%3d ", sample->cpu);
348                 else
349                         printf("[%03d] ", sample->cpu);
350         }
351 
352         if (PRINT_FIELD(TIME)) {
353                 nsecs = sample->time;
354                 secs = nsecs / NSECS_PER_SEC;
355                 nsecs -= secs * NSECS_PER_SEC;
356                 usecs = nsecs / NSECS_PER_USEC;
357                 printf("%5lu.%06lu: ", secs, usecs);
358         }
359 }
360 
361 static bool is_bts_event(struct perf_event_attr *attr)
362 {
363         return ((attr->type == PERF_TYPE_HARDWARE) &&
364                 (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
365                 (attr->sample_period == 1));
366 }
367 
368 static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
369 {
370         if ((attr->type == PERF_TYPE_SOFTWARE) &&
371             ((attr->config == PERF_COUNT_SW_PAGE_FAULTS) ||
372              (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN) ||
373              (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)))
374                 return true;
375 
376         if (is_bts_event(attr))
377                 return true;
378 
379         return false;
380 }
381 
382 static void print_sample_addr(union perf_event *event,
383                           struct perf_sample *sample,
384                           struct machine *machine,
385                           struct thread *thread,
386                           struct perf_event_attr *attr)
387 {
388         struct addr_location al;
389         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
390 
391         printf("%16" PRIx64, sample->addr);
392 
393         if (!sample_addr_correlates_sym(attr))
394                 return;
395 
396         thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
397                               sample->addr, &al);
398         if (!al.map)
399                 thread__find_addr_map(thread, machine, cpumode, MAP__VARIABLE,
400                                       sample->addr, &al);
401 
402         al.cpu = sample->cpu;
403         al.sym = NULL;
404 
405         if (al.map)
406                 al.sym = map__find_symbol(al.map, al.addr, NULL);
407 
408         if (PRINT_FIELD(SYM)) {
409                 printf(" ");
410                 if (PRINT_FIELD(SYMOFFSET))
411                         symbol__fprintf_symname_offs(al.sym, &al, stdout);
412                 else
413                         symbol__fprintf_symname(al.sym, stdout);
414         }
415 
416         if (PRINT_FIELD(DSO)) {
417                 printf(" (");
418                 map__fprintf_dsoname(al.map, stdout);
419                 printf(")");
420         }
421 }
422 
423 static void print_sample_bts(union perf_event *event,
424                              struct perf_sample *sample,
425                              struct perf_evsel *evsel,
426                              struct thread *thread,
427                              struct addr_location *al)
428 {
429         struct perf_event_attr *attr = &evsel->attr;
430 
431         /* print branch_from information */
432         if (PRINT_FIELD(IP)) {
433                 if (!symbol_conf.use_callchain)
434                         printf(" ");
435                 else
436                         printf("\n");
437                 perf_evsel__print_ip(evsel, sample, al,
438                                      output[attr->type].print_ip_opts,
439                                      PERF_MAX_STACK_DEPTH);
440         }
441 
442         printf(" => ");
443 
444         /* print branch_to information */
445         if (PRINT_FIELD(ADDR) ||
446             ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
447              !output[attr->type].user_set))
448                 print_sample_addr(event, sample, al->machine, thread, attr);
449 
450         printf("\n");
451 }
452 
453 static void process_event(union perf_event *event, struct perf_sample *sample,
454                           struct perf_evsel *evsel, struct thread *thread,
455                           struct addr_location *al)
456 {
457         struct perf_event_attr *attr = &evsel->attr;
458 
459         if (output[attr->type].fields == 0)
460                 return;
461 
462         print_sample_start(sample, thread, evsel);
463 
464         if (PRINT_FIELD(EVNAME)) {
465                 const char *evname = perf_evsel__name(evsel);
466                 printf("%s: ", evname ? evname : "[unknown]");
467         }
468 
469         if (is_bts_event(attr)) {
470                 print_sample_bts(event, sample, evsel, thread, al);
471                 return;
472         }
473 
474         if (PRINT_FIELD(TRACE))
475                 event_format__print(evsel->tp_format, sample->cpu,
476                                     sample->raw_data, sample->raw_size);
477         if (PRINT_FIELD(ADDR))
478                 print_sample_addr(event, sample, al->machine, thread, attr);
479 
480         if (PRINT_FIELD(IP)) {
481                 if (!symbol_conf.use_callchain)
482                         printf(" ");
483                 else
484                         printf("\n");
485 
486                 perf_evsel__print_ip(evsel, sample, al,
487                                      output[attr->type].print_ip_opts,
488                                      PERF_MAX_STACK_DEPTH);
489         }
490 
491         printf("\n");
492 }
493 
494 static int default_start_script(const char *script __maybe_unused,
495                                 int argc __maybe_unused,
496                                 const char **argv __maybe_unused)
497 {
498         return 0;
499 }
500 
501 static int default_stop_script(void)
502 {
503         return 0;
504 }
505 
506 static int default_generate_script(struct pevent *pevent __maybe_unused,
507                                    const char *outfile __maybe_unused)
508 {
509         return 0;
510 }
511 
512 static struct scripting_ops default_scripting_ops = {
513         .start_script           = default_start_script,
514         .stop_script            = default_stop_script,
515         .process_event          = process_event,
516         .generate_script        = default_generate_script,
517 };
518 
519 static struct scripting_ops     *scripting_ops;
520 
521 static void setup_scripting(void)
522 {
523         setup_perl_scripting();
524         setup_python_scripting();
525 
526         scripting_ops = &default_scripting_ops;
527 }
528 
529 static int cleanup_scripting(void)
530 {
531         pr_debug("\nperf script stopped\n");
532 
533         return scripting_ops->stop_script();
534 }
535 
536 static int process_sample_event(struct perf_tool *tool __maybe_unused,
537                                 union perf_event *event,
538                                 struct perf_sample *sample,
539                                 struct perf_evsel *evsel,
540                                 struct machine *machine)
541 {
542         struct addr_location al;
543         struct thread *thread = machine__findnew_thread(machine, sample->pid,
544                                                         sample->tid);
545 
546         if (thread == NULL) {
547                 pr_debug("problem processing %d event, skipping it.\n",
548                          event->header.type);
549                 return -1;
550         }
551 
552         if (debug_mode) {
553                 if (sample->time < last_timestamp) {
554                         pr_err("Samples misordered, previous: %" PRIu64
555                                 " this: %" PRIu64 "\n", last_timestamp,
556                                 sample->time);
557                         nr_unordered++;
558                 }
559                 last_timestamp = sample->time;
560                 return 0;
561         }
562 
563         if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
564                 pr_err("problem processing %d event, skipping it.\n",
565                        event->header.type);
566                 return -1;
567         }
568 
569         if (al.filtered)
570                 return 0;
571 
572         if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
573                 return 0;
574 
575         scripting_ops->process_event(event, sample, evsel, thread, &al);
576 
577         evsel->hists.stats.total_period += sample->period;
578         return 0;
579 }
580 
581 struct perf_script {
582         struct perf_tool        tool;
583         struct perf_session     *session;
584         bool                    show_task_events;
585         bool                    show_mmap_events;
586 };
587 
588 static int process_attr(struct perf_tool *tool, union perf_event *event,
589                         struct perf_evlist **pevlist)
590 {
591         struct perf_script *scr = container_of(tool, struct perf_script, tool);
592         struct perf_evlist *evlist;
593         struct perf_evsel *evsel, *pos;
594         int err;
595 
596         err = perf_event__process_attr(tool, event, pevlist);
597         if (err)
598                 return err;
599 
600         evlist = *pevlist;
601         evsel = perf_evlist__last(*pevlist);
602 
603         if (evsel->attr.type >= PERF_TYPE_MAX)
604                 return 0;
605 
606         evlist__for_each(evlist, pos) {
607                 if (pos->attr.type == evsel->attr.type && pos != evsel)
608                         return 0;
609         }
610 
611         set_print_ip_opts(&evsel->attr);
612 
613         return perf_evsel__check_attr(evsel, scr->session);
614 }
615 
616 static int process_comm_event(struct perf_tool *tool,
617                               union perf_event *event,
618                               struct perf_sample *sample,
619                               struct machine *machine)
620 {
621         struct thread *thread;
622         struct perf_script *script = container_of(tool, struct perf_script, tool);
623         struct perf_session *session = script->session;
624         struct perf_evsel *evsel = perf_evlist__first(session->evlist);
625         int ret = -1;
626 
627         thread = machine__findnew_thread(machine, event->comm.pid, event->comm.tid);
628         if (thread == NULL) {
629                 pr_debug("problem processing COMM event, skipping it.\n");
630                 return -1;
631         }
632 
633         if (perf_event__process_comm(tool, event, sample, machine) < 0)
634                 goto out;
635 
636         if (!evsel->attr.sample_id_all) {
637                 sample->cpu = 0;
638                 sample->time = 0;
639                 sample->tid = event->comm.tid;
640                 sample->pid = event->comm.pid;
641         }
642         print_sample_start(sample, thread, evsel);
643         perf_event__fprintf(event, stdout);
644         ret = 0;
645 
646 out:
647         return ret;
648 }
649 
650 static int process_fork_event(struct perf_tool *tool,
651                               union perf_event *event,
652                               struct perf_sample *sample,
653                               struct machine *machine)
654 {
655         struct thread *thread;
656         struct perf_script *script = container_of(tool, struct perf_script, tool);
657         struct perf_session *session = script->session;
658         struct perf_evsel *evsel = perf_evlist__first(session->evlist);
659 
660         if (perf_event__process_fork(tool, event, sample, machine) < 0)
661                 return -1;
662 
663         thread = machine__findnew_thread(machine, event->fork.pid, event->fork.tid);
664         if (thread == NULL) {
665                 pr_debug("problem processing FORK event, skipping it.\n");
666                 return -1;
667         }
668 
669         if (!evsel->attr.sample_id_all) {
670                 sample->cpu = 0;
671                 sample->time = event->fork.time;
672                 sample->tid = event->fork.tid;
673                 sample->pid = event->fork.pid;
674         }
675         print_sample_start(sample, thread, evsel);
676         perf_event__fprintf(event, stdout);
677 
678         return 0;
679 }
680 static int process_exit_event(struct perf_tool *tool,
681                               union perf_event *event,
682                               struct perf_sample *sample,
683                               struct machine *machine)
684 {
685         struct thread *thread;
686         struct perf_script *script = container_of(tool, struct perf_script, tool);
687         struct perf_session *session = script->session;
688         struct perf_evsel *evsel = perf_evlist__first(session->evlist);
689 
690         thread = machine__findnew_thread(machine, event->fork.pid, event->fork.tid);
691         if (thread == NULL) {
692                 pr_debug("problem processing EXIT event, skipping it.\n");
693                 return -1;
694         }
695 
696         if (!evsel->attr.sample_id_all) {
697                 sample->cpu = 0;
698                 sample->time = 0;
699                 sample->tid = event->comm.tid;
700                 sample->pid = event->comm.pid;
701         }
702         print_sample_start(sample, thread, evsel);
703         perf_event__fprintf(event, stdout);
704 
705         if (perf_event__process_exit(tool, event, sample, machine) < 0)
706                 return -1;
707 
708         return 0;
709 }
710 
711 static int process_mmap_event(struct perf_tool *tool,
712                               union perf_event *event,
713                               struct perf_sample *sample,
714                               struct machine *machine)
715 {
716         struct thread *thread;
717         struct perf_script *script = container_of(tool, struct perf_script, tool);
718         struct perf_session *session = script->session;
719         struct perf_evsel *evsel = perf_evlist__first(session->evlist);
720 
721         if (perf_event__process_mmap(tool, event, sample, machine) < 0)
722                 return -1;
723 
724         thread = machine__findnew_thread(machine, event->mmap.pid, event->mmap.tid);
725         if (thread == NULL) {
726                 pr_debug("problem processing MMAP event, skipping it.\n");
727                 return -1;
728         }
729 
730         if (!evsel->attr.sample_id_all) {
731                 sample->cpu = 0;
732                 sample->time = 0;
733                 sample->tid = event->mmap.tid;
734                 sample->pid = event->mmap.pid;
735         }
736         print_sample_start(sample, thread, evsel);
737         perf_event__fprintf(event, stdout);
738 
739         return 0;
740 }
741 
742 static int process_mmap2_event(struct perf_tool *tool,
743                               union perf_event *event,
744                               struct perf_sample *sample,
745                               struct machine *machine)
746 {
747         struct thread *thread;
748         struct perf_script *script = container_of(tool, struct perf_script, tool);
749         struct perf_session *session = script->session;
750         struct perf_evsel *evsel = perf_evlist__first(session->evlist);
751 
752         if (perf_event__process_mmap2(tool, event, sample, machine) < 0)
753                 return -1;
754 
755         thread = machine__findnew_thread(machine, event->mmap2.pid, event->mmap2.tid);
756         if (thread == NULL) {
757                 pr_debug("problem processing MMAP2 event, skipping it.\n");
758                 return -1;
759         }
760 
761         if (!evsel->attr.sample_id_all) {
762                 sample->cpu = 0;
763                 sample->time = 0;
764                 sample->tid = event->mmap2.tid;
765                 sample->pid = event->mmap2.pid;
766         }
767         print_sample_start(sample, thread, evsel);
768         perf_event__fprintf(event, stdout);
769 
770         return 0;
771 }
772 
773 static void sig_handler(int sig __maybe_unused)
774 {
775         session_done = 1;
776 }
777 
778 static int __cmd_script(struct perf_script *script)
779 {
780         int ret;
781 
782         signal(SIGINT, sig_handler);
783 
784         /* override event processing functions */
785         if (script->show_task_events) {
786                 script->tool.comm = process_comm_event;
787                 script->tool.fork = process_fork_event;
788                 script->tool.exit = process_exit_event;
789         }
790         if (script->show_mmap_events) {
791                 script->tool.mmap = process_mmap_event;
792                 script->tool.mmap2 = process_mmap2_event;
793         }
794 
795         ret = perf_session__process_events(script->session, &script->tool);
796 
797         if (debug_mode)
798                 pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
799 
800         return ret;
801 }
802 
803 struct script_spec {
804         struct list_head        node;
805         struct scripting_ops    *ops;
806         char                    spec[0];
807 };
808 
809 static LIST_HEAD(script_specs);
810 
811 static struct script_spec *script_spec__new(const char *spec,
812                                             struct scripting_ops *ops)
813 {
814         struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
815 
816         if (s != NULL) {
817                 strcpy(s->spec, spec);
818                 s->ops = ops;
819         }
820 
821         return s;
822 }
823 
824 static void script_spec__add(struct script_spec *s)
825 {
826         list_add_tail(&s->node, &script_specs);
827 }
828 
829 static struct script_spec *script_spec__find(const char *spec)
830 {
831         struct script_spec *s;
832 
833         list_for_each_entry(s, &script_specs, node)
834                 if (strcasecmp(s->spec, spec) == 0)
835                         return s;
836         return NULL;
837 }
838 
839 static struct script_spec *script_spec__findnew(const char *spec,
840                                                 struct scripting_ops *ops)
841 {
842         struct script_spec *s = script_spec__find(spec);
843 
844         if (s)
845                 return s;
846 
847         s = script_spec__new(spec, ops);
848         if (!s)
849                 return NULL;
850 
851         script_spec__add(s);
852 
853         return s;
854 }
855 
856 int script_spec_register(const char *spec, struct scripting_ops *ops)
857 {
858         struct script_spec *s;
859 
860         s = script_spec__find(spec);
861         if (s)
862                 return -1;
863 
864         s = script_spec__findnew(spec, ops);
865         if (!s)
866                 return -1;
867 
868         return 0;
869 }
870 
871 static struct scripting_ops *script_spec__lookup(const char *spec)
872 {
873         struct script_spec *s = script_spec__find(spec);
874         if (!s)
875                 return NULL;
876 
877         return s->ops;
878 }
879 
880 static void list_available_languages(void)
881 {
882         struct script_spec *s;
883 
884         fprintf(stderr, "\n");
885         fprintf(stderr, "Scripting language extensions (used in "
886                 "perf script -s [spec:]script.[spec]):\n\n");
887 
888         list_for_each_entry(s, &script_specs, node)
889                 fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
890 
891         fprintf(stderr, "\n");
892 }
893 
894 static int parse_scriptname(const struct option *opt __maybe_unused,
895                             const char *str, int unset __maybe_unused)
896 {
897         char spec[PATH_MAX];
898         const char *script, *ext;
899         int len;
900 
901         if (strcmp(str, "lang") == 0) {
902                 list_available_languages();
903                 exit(0);
904         }
905 
906         script = strchr(str, ':');
907         if (script) {
908                 len = script - str;
909                 if (len >= PATH_MAX) {
910                         fprintf(stderr, "invalid language specifier");
911                         return -1;
912                 }
913                 strncpy(spec, str, len);
914                 spec[len] = '\0';
915                 scripting_ops = script_spec__lookup(spec);
916                 if (!scripting_ops) {
917                         fprintf(stderr, "invalid language specifier");
918                         return -1;
919                 }
920                 script++;
921         } else {
922                 script = str;
923                 ext = strrchr(script, '.');
924                 if (!ext) {
925                         fprintf(stderr, "invalid script extension");
926                         return -1;
927                 }
928                 scripting_ops = script_spec__lookup(++ext);
929                 if (!scripting_ops) {
930                         fprintf(stderr, "invalid script extension");
931                         return -1;
932                 }
933         }
934 
935         script_name = strdup(script);
936 
937         return 0;
938 }
939 
940 static int parse_output_fields(const struct option *opt __maybe_unused,
941                             const char *arg, int unset __maybe_unused)
942 {
943         char *tok;
944         int i, imax = ARRAY_SIZE(all_output_options);
945         int j;
946         int rc = 0;
947         char *str = strdup(arg);
948         int type = -1;
949 
950         if (!str)
951                 return -ENOMEM;
952 
953         /* first word can state for which event type the user is specifying
954          * the fields. If no type exists, the specified fields apply to all
955          * event types found in the file minus the invalid fields for a type.
956          */
957         tok = strchr(str, ':');
958         if (tok) {
959                 *tok = '\0';
960                 tok++;
961                 if (!strcmp(str, "hw"))
962                         type = PERF_TYPE_HARDWARE;
963                 else if (!strcmp(str, "sw"))
964                         type = PERF_TYPE_SOFTWARE;
965                 else if (!strcmp(str, "trace"))
966                         type = PERF_TYPE_TRACEPOINT;
967                 else if (!strcmp(str, "raw"))
968                         type = PERF_TYPE_RAW;
969                 else {
970                         fprintf(stderr, "Invalid event type in field string.\n");
971                         rc = -EINVAL;
972                         goto out;
973                 }
974 
975                 if (output[type].user_set)
976                         pr_warning("Overriding previous field request for %s events.\n",
977                                    event_type(type));
978 
979                 output[type].fields = 0;
980                 output[type].user_set = true;
981                 output[type].wildcard_set = false;
982 
983         } else {
984                 tok = str;
985                 if (strlen(str) == 0) {
986                         fprintf(stderr,
987                                 "Cannot set fields to 'none' for all event types.\n");
988                         rc = -EINVAL;
989                         goto out;
990                 }
991 
992                 if (output_set_by_user())
993                         pr_warning("Overriding previous field request for all events.\n");
994 
995                 for (j = 0; j < PERF_TYPE_MAX; ++j) {
996                         output[j].fields = 0;
997                         output[j].user_set = true;
998                         output[j].wildcard_set = true;
999                 }
1000         }
1001 
1002         tok = strtok(tok, ",");
1003         while (tok) {
1004                 for (i = 0; i < imax; ++i) {
1005                         if (strcmp(tok, all_output_options[i].str) == 0)
1006                                 break;
1007                 }
1008                 if (i == imax) {
1009                         fprintf(stderr, "Invalid field requested.\n");
1010                         rc = -EINVAL;
1011                         goto out;
1012                 }
1013 
1014                 if (type == -1) {
1015                         /* add user option to all events types for
1016                          * which it is valid
1017                          */
1018                         for (j = 0; j < PERF_TYPE_MAX; ++j) {
1019                                 if (output[j].invalid_fields & all_output_options[i].field) {
1020                                         pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
1021                                                    all_output_options[i].str, event_type(j));
1022                                 } else
1023                                         output[j].fields |= all_output_options[i].field;
1024                         }
1025                 } else {
1026                         if (output[type].invalid_fields & all_output_options[i].field) {
1027                                 fprintf(stderr, "\'%s\' not valid for %s events.\n",
1028                                          all_output_options[i].str, event_type(type));
1029 
1030                                 rc = -EINVAL;
1031                                 goto out;
1032                         }
1033                         output[type].fields |= all_output_options[i].field;
1034                 }
1035 
1036                 tok = strtok(NULL, ",");
1037         }
1038 
1039         if (type >= 0) {
1040                 if (output[type].fields == 0) {
1041                         pr_debug("No fields requested for %s type. "
1042                                  "Events will not be displayed.\n", event_type(type));
1043                 }
1044         }
1045 
1046 out:
1047         free(str);
1048         return rc;
1049 }
1050 
1051 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
1052 static int is_directory(const char *base_path, const struct dirent *dent)
1053 {
1054         char path[PATH_MAX];
1055         struct stat st;
1056 
1057         sprintf(path, "%s/%s", base_path, dent->d_name);
1058         if (stat(path, &st))
1059                 return 0;
1060 
1061         return S_ISDIR(st.st_mode);
1062 }
1063 
1064 #define for_each_lang(scripts_path, scripts_dir, lang_dirent)           \
1065         while ((lang_dirent = readdir(scripts_dir)) != NULL)            \
1066                 if ((lang_dirent->d_type == DT_DIR ||                   \
1067                      (lang_dirent->d_type == DT_UNKNOWN &&              \
1068                       is_directory(scripts_path, lang_dirent))) &&      \
1069                     (strcmp(lang_dirent->d_name, ".")) &&               \
1070                     (strcmp(lang_dirent->d_name, "..")))
1071 
1072 #define for_each_script(lang_path, lang_dir, script_dirent)             \
1073         while ((script_dirent = readdir(lang_dir)) != NULL)             \
1074                 if (script_dirent->d_type != DT_DIR &&                  \
1075                     (script_dirent->d_type != DT_UNKNOWN ||             \
1076                      !is_directory(lang_path, script_dirent)))
1077 
1078 
1079 #define RECORD_SUFFIX                   "-record"
1080 #define REPORT_SUFFIX                   "-report"
1081 
1082 struct script_desc {
1083         struct list_head        node;
1084         char                    *name;
1085         char                    *half_liner;
1086         char                    *args;
1087 };
1088 
1089 static LIST_HEAD(script_descs);
1090 
1091 static struct script_desc *script_desc__new(const char *name)
1092 {
1093         struct script_desc *s = zalloc(sizeof(*s));
1094 
1095         if (s != NULL && name)
1096                 s->name = strdup(name);
1097 
1098         return s;
1099 }
1100 
1101 static void script_desc__delete(struct script_desc *s)
1102 {
1103         zfree(&s->name);
1104         zfree(&s->half_liner);
1105         zfree(&s->args);
1106         free(s);
1107 }
1108 
1109 static void script_desc__add(struct script_desc *s)
1110 {
1111         list_add_tail(&s->node, &script_descs);
1112 }
1113 
1114 static struct script_desc *script_desc__find(const char *name)
1115 {
1116         struct script_desc *s;
1117 
1118         list_for_each_entry(s, &script_descs, node)
1119                 if (strcasecmp(s->name, name) == 0)
1120                         return s;
1121         return NULL;
1122 }
1123 
1124 static struct script_desc *script_desc__findnew(const char *name)
1125 {
1126         struct script_desc *s = script_desc__find(name);
1127 
1128         if (s)
1129                 return s;
1130 
1131         s = script_desc__new(name);
1132         if (!s)
1133                 goto out_delete_desc;
1134 
1135         script_desc__add(s);
1136 
1137         return s;
1138 
1139 out_delete_desc:
1140         script_desc__delete(s);
1141 
1142         return NULL;
1143 }
1144 
1145 static const char *ends_with(const char *str, const char *suffix)
1146 {
1147         size_t suffix_len = strlen(suffix);
1148         const char *p = str;
1149 
1150         if (strlen(str) > suffix_len) {
1151                 p = str + strlen(str) - suffix_len;
1152                 if (!strncmp(p, suffix, suffix_len))
1153                         return p;
1154         }
1155 
1156         return NULL;
1157 }
1158 
1159 static int read_script_info(struct script_desc *desc, const char *filename)
1160 {
1161         char line[BUFSIZ], *p;
1162         FILE *fp;
1163 
1164         fp = fopen(filename, "r");
1165         if (!fp)
1166                 return -1;
1167 
1168         while (fgets(line, sizeof(line), fp)) {
1169                 p = ltrim(line);
1170                 if (strlen(p) == 0)
1171                         continue;
1172                 if (*p != '#')
1173                         continue;
1174                 p++;
1175                 if (strlen(p) && *p == '!')
1176                         continue;
1177 
1178                 p = ltrim(p);
1179                 if (strlen(p) && p[strlen(p) - 1] == '\n')
1180                         p[strlen(p) - 1] = '\0';
1181 
1182                 if (!strncmp(p, "description:", strlen("description:"))) {
1183                         p += strlen("description:");
1184                         desc->half_liner = strdup(ltrim(p));
1185                         continue;
1186                 }
1187 
1188                 if (!strncmp(p, "args:", strlen("args:"))) {
1189                         p += strlen("args:");
1190                         desc->args = strdup(ltrim(p));
1191                         continue;
1192                 }
1193         }
1194 
1195         fclose(fp);
1196 
1197         return 0;
1198 }
1199 
1200 static char *get_script_root(struct dirent *script_dirent, const char *suffix)
1201 {
1202         char *script_root, *str;
1203 
1204         script_root = strdup(script_dirent->d_name);
1205         if (!script_root)
1206                 return NULL;
1207 
1208         str = (char *)ends_with(script_root, suffix);
1209         if (!str) {
1210                 free(script_root);
1211                 return NULL;
1212         }
1213 
1214         *str = '\0';
1215         return script_root;
1216 }
1217 
1218 static int list_available_scripts(const struct option *opt __maybe_unused,
1219                                   const char *s __maybe_unused,
1220                                   int unset __maybe_unused)
1221 {
1222         struct dirent *script_dirent, *lang_dirent;
1223         char scripts_path[MAXPATHLEN];
1224         DIR *scripts_dir, *lang_dir;
1225         char script_path[MAXPATHLEN];
1226         char lang_path[MAXPATHLEN];
1227         struct script_desc *desc;
1228         char first_half[BUFSIZ];
1229         char *script_root;
1230 
1231         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1232 
1233         scripts_dir = opendir(scripts_path);
1234         if (!scripts_dir)
1235                 return -1;
1236 
1237         for_each_lang(scripts_path, scripts_dir, lang_dirent) {
1238                 scnprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1239                           lang_dirent->d_name);
1240                 lang_dir = opendir(lang_path);
1241                 if (!lang_dir)
1242                         continue;
1243 
1244                 for_each_script(lang_path, lang_dir, script_dirent) {
1245                         script_root = get_script_root(script_dirent, REPORT_SUFFIX);
1246                         if (script_root) {
1247                                 desc = script_desc__findnew(script_root);
1248                                 scnprintf(script_path, MAXPATHLEN, "%s/%s",
1249                                           lang_path, script_dirent->d_name);
1250                                 read_script_info(desc, script_path);
1251                                 free(script_root);
1252                         }
1253                 }
1254         }
1255 
1256         fprintf(stdout, "List of available trace scripts:\n");
1257         list_for_each_entry(desc, &script_descs, node) {
1258                 sprintf(first_half, "%s %s", desc->name,
1259                         desc->args ? desc->args : "");
1260                 fprintf(stdout, "  %-36s %s\n", first_half,
1261                         desc->half_liner ? desc->half_liner : "");
1262         }
1263 
1264         exit(0);
1265 }
1266 
1267 /*
1268  * Some scripts specify the required events in their "xxx-record" file,
1269  * this function will check if the events in perf.data match those
1270  * mentioned in the "xxx-record".
1271  *
1272  * Fixme: All existing "xxx-record" are all in good formats "-e event ",
1273  * which is covered well now. And new parsing code should be added to
1274  * cover the future complexing formats like event groups etc.
1275  */
1276 static int check_ev_match(char *dir_name, char *scriptname,
1277                         struct perf_session *session)
1278 {
1279         char filename[MAXPATHLEN], evname[128];
1280         char line[BUFSIZ], *p;
1281         struct perf_evsel *pos;
1282         int match, len;
1283         FILE *fp;
1284 
1285         scnprintf(filename, MAXPATHLEN, "%s/bin/%s-record", dir_name, scriptname);
1286 
1287         fp = fopen(filename, "r");
1288         if (!fp)
1289                 return -1;
1290 
1291         while (fgets(line, sizeof(line), fp)) {
1292                 p = ltrim(line);
1293                 if (*p == '#')
1294                         continue;
1295 
1296                 while (strlen(p)) {
1297                         p = strstr(p, "-e");
1298                         if (!p)
1299                                 break;
1300 
1301                         p += 2;
1302                         p = ltrim(p);
1303                         len = strcspn(p, " \t");
1304                         if (!len)
1305                                 break;
1306 
1307                         snprintf(evname, len + 1, "%s", p);
1308 
1309                         match = 0;
1310                         evlist__for_each(session->evlist, pos) {
1311                                 if (!strcmp(perf_evsel__name(pos), evname)) {
1312                                         match = 1;
1313                                         break;
1314                                 }
1315                         }
1316 
1317                         if (!match) {
1318                                 fclose(fp);
1319                                 return -1;
1320                         }
1321                 }
1322         }
1323 
1324         fclose(fp);
1325         return 0;
1326 }
1327 
1328 /*
1329  * Return -1 if none is found, otherwise the actual scripts number.
1330  *
1331  * Currently the only user of this function is the script browser, which
1332  * will list all statically runnable scripts, select one, execute it and
1333  * show the output in a perf browser.
1334  */
1335 int find_scripts(char **scripts_array, char **scripts_path_array)
1336 {
1337         struct dirent *script_dirent, *lang_dirent;
1338         char scripts_path[MAXPATHLEN], lang_path[MAXPATHLEN];
1339         DIR *scripts_dir, *lang_dir;
1340         struct perf_session *session;
1341         struct perf_data_file file = {
1342                 .path = input_name,
1343                 .mode = PERF_DATA_MODE_READ,
1344         };
1345         char *temp;
1346         int i = 0;
1347 
1348         session = perf_session__new(&file, false, NULL);
1349         if (!session)
1350                 return -1;
1351 
1352         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1353 
1354         scripts_dir = opendir(scripts_path);
1355         if (!scripts_dir) {
1356                 perf_session__delete(session);
1357                 return -1;
1358         }
1359 
1360         for_each_lang(scripts_path, scripts_dir, lang_dirent) {
1361                 scnprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
1362                           lang_dirent->d_name);
1363 #ifdef NO_LIBPERL
1364                 if (strstr(lang_path, "perl"))
1365                         continue;
1366 #endif
1367 #ifdef NO_LIBPYTHON
1368                 if (strstr(lang_path, "python"))
1369                         continue;
1370 #endif
1371 
1372                 lang_dir = opendir(lang_path);
1373                 if (!lang_dir)
1374                         continue;
1375 
1376                 for_each_script(lang_path, lang_dir, script_dirent) {
1377                         /* Skip those real time scripts: xxxtop.p[yl] */
1378                         if (strstr(script_dirent->d_name, "top."))
1379                                 continue;
1380                         sprintf(scripts_path_array[i], "%s/%s", lang_path,
1381                                 script_dirent->d_name);
1382                         temp = strchr(script_dirent->d_name, '.');
1383                         snprintf(scripts_array[i],
1384                                 (temp - script_dirent->d_name) + 1,
1385                                 "%s", script_dirent->d_name);
1386 
1387                         if (check_ev_match(lang_path,
1388                                         scripts_array[i], session))
1389                                 continue;
1390 
1391                         i++;
1392                 }
1393                 closedir(lang_dir);
1394         }
1395 
1396         closedir(scripts_dir);
1397         perf_session__delete(session);
1398         return i;
1399 }
1400 
1401 static char *get_script_path(const char *script_root, const char *suffix)
1402 {
1403         struct dirent *script_dirent, *lang_dirent;
1404         char scripts_path[MAXPATHLEN];
1405         char script_path[MAXPATHLEN];
1406         DIR *scripts_dir, *lang_dir;
1407         char lang_path[MAXPATHLEN];
1408         char *__script_root;
1409 
1410         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1411 
1412         scripts_dir = opendir(scripts_path);
1413         if (!scripts_dir)
1414                 return NULL;
1415 
1416         for_each_lang(scripts_path, scripts_dir, lang_dirent) {
1417                 scnprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1418                           lang_dirent->d_name);
1419                 lang_dir = opendir(lang_path);
1420                 if (!lang_dir)
1421                         continue;
1422 
1423                 for_each_script(lang_path, lang_dir, script_dirent) {
1424                         __script_root = get_script_root(script_dirent, suffix);
1425                         if (__script_root && !strcmp(script_root, __script_root)) {
1426                                 free(__script_root);
1427                                 closedir(lang_dir);
1428                                 closedir(scripts_dir);
1429                                 scnprintf(script_path, MAXPATHLEN, "%s/%s",
1430                                           lang_path, script_dirent->d_name);
1431                                 return strdup(script_path);
1432                         }
1433                         free(__script_root);
1434                 }
1435                 closedir(lang_dir);
1436         }
1437         closedir(scripts_dir);
1438 
1439         return NULL;
1440 }
1441 
1442 static bool is_top_script(const char *script_path)
1443 {
1444         return ends_with(script_path, "top") == NULL ? false : true;
1445 }
1446 
1447 static int has_required_arg(char *script_path)
1448 {
1449         struct script_desc *desc;
1450         int n_args = 0;
1451         char *p;
1452 
1453         desc = script_desc__new(NULL);
1454 
1455         if (read_script_info(desc, script_path))
1456                 goto out;
1457 
1458         if (!desc->args)
1459                 goto out;
1460 
1461         for (p = desc->args; *p; p++)
1462                 if (*p == '<')
1463                         n_args++;
1464 out:
1465         script_desc__delete(desc);
1466 
1467         return n_args;
1468 }
1469 
1470 static int have_cmd(int argc, const char **argv)
1471 {
1472         char **__argv = malloc(sizeof(const char *) * argc);
1473 
1474         if (!__argv) {
1475                 pr_err("malloc failed\n");
1476                 return -1;
1477         }
1478 
1479         memcpy(__argv, argv, sizeof(const char *) * argc);
1480         argc = parse_options(argc, (const char **)__argv, record_options,
1481                              NULL, PARSE_OPT_STOP_AT_NON_OPTION);
1482         free(__argv);
1483 
1484         system_wide = (argc == 0);
1485 
1486         return 0;
1487 }
1488 
1489 int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
1490 {
1491         bool show_full_info = false;
1492         bool header = false;
1493         bool header_only = false;
1494         char *rec_script_path = NULL;
1495         char *rep_script_path = NULL;
1496         struct perf_session *session;
1497         char *script_path = NULL;
1498         const char **__argv;
1499         int i, j, err;
1500         struct perf_script script = {
1501                 .tool = {
1502                         .sample          = process_sample_event,
1503                         .mmap            = perf_event__process_mmap,
1504                         .mmap2           = perf_event__process_mmap2,
1505                         .comm            = perf_event__process_comm,
1506                         .exit            = perf_event__process_exit,
1507                         .fork            = perf_event__process_fork,
1508                         .attr            = process_attr,
1509                         .tracing_data    = perf_event__process_tracing_data,
1510                         .build_id        = perf_event__process_build_id,
1511                         .ordered_samples = true,
1512                         .ordering_requires_timestamps = true,
1513                 },
1514         };
1515         const struct option options[] = {
1516         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1517                     "dump raw trace in ASCII"),
1518         OPT_INCR('v', "verbose", &verbose,
1519                  "be more verbose (show symbol address, etc)"),
1520         OPT_BOOLEAN('L', "Latency", &latency_format,
1521                     "show latency attributes (irqs/preemption disabled, etc)"),
1522         OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
1523                            list_available_scripts),
1524         OPT_CALLBACK('s', "script", NULL, "name",
1525                      "script file name (lang:script name, script name, or *)",
1526                      parse_scriptname),
1527         OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
1528                    "generate perf-script.xx script in specified language"),
1529         OPT_STRING('i', "input", &input_name, "file", "input file name"),
1530         OPT_BOOLEAN('d', "debug-mode", &debug_mode,
1531                    "do various checks like samples ordering and lost events"),
1532         OPT_BOOLEAN(0, "header", &header, "Show data header."),
1533         OPT_BOOLEAN(0, "header-only", &header_only, "Show only data header."),
1534         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1535                    "file", "vmlinux pathname"),
1536         OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1537                    "file", "kallsyms pathname"),
1538         OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
1539                     "When printing symbols do not display call chain"),
1540         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1541                     "Look for files with symbols relative to this directory"),
1542         OPT_CALLBACK('f', "fields", NULL, "str",
1543                      "comma separated output fields prepend with 'type:'. "
1544                      "Valid types: hw,sw,trace,raw. "
1545                      "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
1546                      "addr,symoff", parse_output_fields),
1547         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1548                     "system-wide collection from all CPUs"),
1549         OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1550                    "only consider these symbols"),
1551         OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1552         OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1553                    "only display events for these comms"),
1554         OPT_BOOLEAN('I', "show-info", &show_full_info,
1555                     "display extended information from perf.data file"),
1556         OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
1557                     "Show the path of [kernel.kallsyms]"),
1558         OPT_BOOLEAN('\0', "show-task-events", &script.show_task_events,
1559                     "Show the fork/comm/exit events"),
1560         OPT_BOOLEAN('\0', "show-mmap-events", &script.show_mmap_events,
1561                     "Show the mmap events"),
1562         OPT_END()
1563         };
1564         const char * const script_usage[] = {
1565                 "perf script [<options>]",
1566                 "perf script [<options>] record <script> [<record-options>] <command>",
1567                 "perf script [<options>] report <script> [script-args]",
1568                 "perf script [<options>] <script> [<record-options>] <command>",
1569                 "perf script [<options>] <top-script> [script-args]",
1570                 NULL
1571         };
1572         struct perf_data_file file = {
1573                 .mode = PERF_DATA_MODE_READ,
1574         };
1575 
1576         setup_scripting();
1577 
1578         argc = parse_options(argc, argv, options, script_usage,
1579                              PARSE_OPT_STOP_AT_NON_OPTION);
1580 
1581         file.path = input_name;
1582 
1583         if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
1584                 rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
1585                 if (!rec_script_path)
1586                         return cmd_record(argc, argv, NULL);
1587         }
1588 
1589         if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
1590                 rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
1591                 if (!rep_script_path) {
1592                         fprintf(stderr,
1593                                 "Please specify a valid report script"
1594                                 "(see 'perf script -l' for listing)\n");
1595                         return -1;
1596                 }
1597         }
1598 
1599         /* make sure PERF_EXEC_PATH is set for scripts */
1600         perf_set_argv_exec_path(perf_exec_path());
1601 
1602         if (argc && !script_name && !rec_script_path && !rep_script_path) {
1603                 int live_pipe[2];
1604                 int rep_args;
1605                 pid_t pid;
1606 
1607                 rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
1608                 rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
1609 
1610                 if (!rec_script_path && !rep_script_path) {
1611                         fprintf(stderr, " Couldn't find script %s\n\n See perf"
1612                                 " script -l for available scripts.\n", argv[0]);
1613                         usage_with_options(script_usage, options);
1614                 }
1615 
1616                 if (is_top_script(argv[0])) {
1617                         rep_args = argc - 1;
1618                 } else {
1619                         int rec_args;
1620 
1621                         rep_args = has_required_arg(rep_script_path);
1622                         rec_args = (argc - 1) - rep_args;
1623                         if (rec_args < 0) {
1624                                 fprintf(stderr, " %s script requires options."
1625                                         "\n\n See perf script -l for available "
1626                                         "scripts and options.\n", argv[0]);
1627                                 usage_with_options(script_usage, options);
1628                         }
1629                 }
1630 
1631                 if (pipe(live_pipe) < 0) {
1632                         perror("failed to create pipe");
1633                         return -1;
1634                 }
1635 
1636                 pid = fork();
1637                 if (pid < 0) {
1638                         perror("failed to fork");
1639                         return -1;
1640                 }
1641 
1642                 if (!pid) {
1643                         j = 0;
1644 
1645                         dup2(live_pipe[1], 1);
1646                         close(live_pipe[0]);
1647 
1648                         if (is_top_script(argv[0])) {
1649                                 system_wide = true;
1650                         } else if (!system_wide) {
1651                                 if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
1652                                         err = -1;
1653                                         goto out;
1654                                 }
1655                         }
1656 
1657                         __argv = malloc((argc + 6) * sizeof(const char *));
1658                         if (!__argv) {
1659                                 pr_err("malloc failed\n");
1660                                 err = -ENOMEM;
1661                                 goto out;
1662                         }
1663 
1664                         __argv[j++] = "/bin/sh";
1665                         __argv[j++] = rec_script_path;
1666                         if (system_wide)
1667                                 __argv[j++] = "-a";
1668                         __argv[j++] = "-q";
1669                         __argv[j++] = "-o";
1670                         __argv[j++] = "-";
1671                         for (i = rep_args + 1; i < argc; i++)
1672                                 __argv[j++] = argv[i];
1673                         __argv[j++] = NULL;
1674 
1675                         execvp("/bin/sh", (char **)__argv);
1676                         free(__argv);
1677                         exit(-1);
1678                 }
1679 
1680                 dup2(live_pipe[0], 0);
1681                 close(live_pipe[1]);
1682 
1683                 __argv = malloc((argc + 4) * sizeof(const char *));
1684                 if (!__argv) {
1685                         pr_err("malloc failed\n");
1686                         err = -ENOMEM;
1687                         goto out;
1688                 }
1689 
1690                 j = 0;
1691                 __argv[j++] = "/bin/sh";
1692                 __argv[j++] = rep_script_path;
1693                 for (i = 1; i < rep_args + 1; i++)
1694                         __argv[j++] = argv[i];
1695                 __argv[j++] = "-i";
1696                 __argv[j++] = "-";
1697                 __argv[j++] = NULL;
1698 
1699                 execvp("/bin/sh", (char **)__argv);
1700                 free(__argv);
1701                 exit(-1);
1702         }
1703 
1704         if (rec_script_path)
1705                 script_path = rec_script_path;
1706         if (rep_script_path)
1707                 script_path = rep_script_path;
1708 
1709         if (script_path) {
1710                 j = 0;
1711 
1712                 if (!rec_script_path)
1713                         system_wide = false;
1714                 else if (!system_wide) {
1715                         if (have_cmd(argc - 1, &argv[1]) != 0) {
1716                                 err = -1;
1717                                 goto out;
1718                         }
1719                 }
1720 
1721                 __argv = malloc((argc + 2) * sizeof(const char *));
1722                 if (!__argv) {
1723                         pr_err("malloc failed\n");
1724                         err = -ENOMEM;
1725                         goto out;
1726                 }
1727 
1728                 __argv[j++] = "/bin/sh";
1729                 __argv[j++] = script_path;
1730                 if (system_wide)
1731                         __argv[j++] = "-a";
1732                 for (i = 2; i < argc; i++)
1733                         __argv[j++] = argv[i];
1734                 __argv[j++] = NULL;
1735 
1736                 execvp("/bin/sh", (char **)__argv);
1737                 free(__argv);
1738                 exit(-1);
1739         }
1740 
1741         if (symbol__init() < 0)
1742                 return -1;
1743         if (!script_name)
1744                 setup_pager();
1745 
1746         session = perf_session__new(&file, false, &script.tool);
1747         if (session == NULL)
1748                 return -ENOMEM;
1749 
1750         if (header || header_only) {
1751                 perf_session__fprintf_info(session, stdout, show_full_info);
1752                 if (header_only)
1753                         return 0;
1754         }
1755 
1756         script.session = session;
1757 
1758         if (cpu_list) {
1759                 if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
1760                         return -1;
1761         }
1762 
1763         if (!no_callchain)
1764                 symbol_conf.use_callchain = true;
1765         else
1766                 symbol_conf.use_callchain = false;
1767 
1768         if (generate_script_lang) {
1769                 struct stat perf_stat;
1770                 int input;
1771 
1772                 if (output_set_by_user()) {
1773                         fprintf(stderr,
1774                                 "custom fields not supported for generated scripts");
1775                         return -1;
1776                 }
1777 
1778                 input = open(file.path, O_RDONLY);      /* input_name */
1779                 if (input < 0) {
1780                         perror("failed to open file");
1781                         return -1;
1782                 }
1783 
1784                 err = fstat(input, &perf_stat);
1785                 if (err < 0) {
1786                         perror("failed to stat file");
1787                         return -1;
1788                 }
1789 
1790                 if (!perf_stat.st_size) {
1791                         fprintf(stderr, "zero-sized file, nothing to do!\n");
1792                         return 0;
1793                 }
1794 
1795                 scripting_ops = script_spec__lookup(generate_script_lang);
1796                 if (!scripting_ops) {
1797                         fprintf(stderr, "invalid language specifier");
1798                         return -1;
1799                 }
1800 
1801                 err = scripting_ops->generate_script(session->tevent.pevent,
1802                                                      "perf-script");
1803                 goto out;
1804         }
1805 
1806         if (script_name) {
1807                 err = scripting_ops->start_script(script_name, argc, argv);
1808                 if (err)
1809                         goto out;
1810                 pr_debug("perf script started with script %s\n\n", script_name);
1811         }
1812 
1813 
1814         err = perf_session__check_output_opt(session);
1815         if (err < 0)
1816                 goto out;
1817 
1818         err = __cmd_script(&script);
1819 
1820         perf_session__delete(session);
1821         cleanup_scripting();
1822 out:
1823         return err;
1824 }
1825 

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