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