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