tools/perf/builtin-script.c

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