tools/perf/builtin-script.c

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