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                 print_sample_addr(event, sample, machine, thread, attr);
 414
 415         printf("\n");
 416 }
 417
 418 static void process_event(union perf_event *event, struct perf_sample *sample,
 419                           struct perf_evsel *evsel, struct machine *machine,
 420                           struct thread *thread,
 421                           struct addr_location *al __maybe_unused)
 422 {
 423         struct perf_event_attr *attr = &evsel->attr;
 424
 425         if (output[attr->type].fields == 0)
 426                 return;
 427
 428         print_sample_start(sample, thread, evsel);
 429
 430         if (is_bts_event(attr)) {
 431                 print_sample_bts(event, sample, evsel, machine, thread);
 432                 return;
 433         }
 434
 435         if (PRINT_FIELD(TRACE))
 436                 event_format__print(evsel->tp_format, sample->cpu,
 437                                     sample->raw_data, sample->raw_size);
 438         if (PRINT_FIELD(ADDR))
 439                 print_sample_addr(event, sample, machine, thread, attr);
 440
 441         if (PRINT_FIELD(IP)) {
 442                 if (!symbol_conf.use_callchain)
 443                         printf(" ");
 444                 else
 445                         printf("\n");
 446
 447                 perf_evsel__print_ip(evsel, event, sample, machine,
 448                                      output[attr->type].print_ip_opts,
 449                                      PERF_MAX_STACK_DEPTH);
 450         }
 451
 452         printf("\n");
 453 }
 454
 455 static int default_start_script(const char *script __maybe_unused,
 456                                 int argc __maybe_unused,
 457                                 const char **argv __maybe_unused)
 458 {
 459         return 0;
 460 }
 461
 462 static int default_stop_script(void)
 463 {
 464         return 0;
 465 }
 466
 467 static int default_generate_script(struct pevent *pevent __maybe_unused,
 468                                    const char *outfile __maybe_unused)
 469 {
 470         return 0;
 471 }
 472
 473 static struct scripting_ops default_scripting_ops = {
 474         .start_script           = default_start_script,
 475         .stop_script            = default_stop_script,
 476         .process_event          = process_event,
 477         .generate_script        = default_generate_script,
 478 };
 479
 480 static struct scripting_ops     *scripting_ops;
 481
 482 static void setup_scripting(void)
 483 {
 484         setup_perl_scripting();
 485         setup_python_scripting();
 486
 487         scripting_ops = &default_scripting_ops;
 488 }
 489
 490 static int cleanup_scripting(void)
 491 {
 492         pr_debug("\nperf script stopped\n");
 493
 494         return scripting_ops->stop_script();
 495 }
 496
 497 static int process_sample_event(struct perf_tool *tool __maybe_unused,
 498                                 union perf_event *event,
 499                                 struct perf_sample *sample,
 500                                 struct perf_evsel *evsel,
 501                                 struct machine *machine)
 502 {
 503         struct addr_location al;
 504         struct thread *thread = machine__findnew_thread(machine, sample->pid,
 505                                                         sample->tid);
 506
 507         if (thread == NULL) {
 508                 pr_debug("problem processing %d event, skipping it.\n",
 509                          event->header.type);
 510                 return -1;
 511         }
 512
 513         if (debug_mode) {
 514                 if (sample->time < last_timestamp) {
 515                         pr_err("Samples misordered, previous: %" PRIu64
 516                                 " this: %" PRIu64 "\n", last_timestamp,
 517                                 sample->time);
 518                         nr_unordered++;
 519                 }
 520                 last_timestamp = sample->time;
 521                 return 0;
 522         }
 523
 524         if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
 525                 pr_err("problem processing %d event, skipping it.\n",
 526                        event->header.type);
 527                 return -1;
 528         }
 529
 530         if (al.filtered)
 531                 return 0;
 532
 533         if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
 534                 return 0;
 535
 536         scripting_ops->process_event(event, sample, evsel, machine, thread, &al);
 537
 538         evsel->hists.stats.total_period += sample->period;
 539         return 0;
 540 }
 541
 542 static struct perf_tool perf_script = {
 543         .sample          = process_sample_event,
 544         .mmap            = perf_event__process_mmap,
 545         .mmap2           = perf_event__process_mmap2,
 546         .comm            = perf_event__process_comm,
 547         .exit            = perf_event__process_exit,
 548         .fork            = perf_event__process_fork,
 549         .attr            = perf_event__process_attr,
 550         .tracing_data    = perf_event__process_tracing_data,
 551         .build_id        = perf_event__process_build_id,
 552         .ordered_samples = true,
 553         .ordering_requires_timestamps = true,
 554 };
 555
 556 static void sig_handler(int sig __maybe_unused)
 557 {
 558         session_done = 1;
 559 }
 560
 561 static int __cmd_script(struct perf_session *session)
 562 {
 563         int ret;
 564
 565         signal(SIGINT, sig_handler);
 566
 567         ret = perf_session__process_events(session, &perf_script);
 568
 569         if (debug_mode)
 570                 pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
 571
 572         return ret;
 573 }
 574
 575 struct script_spec {
 576         struct list_head        node;
 577         struct scripting_ops    *ops;
 578         char                    spec[0];
 579 };
 580
 581 static LIST_HEAD(script_specs);
 582
 583 static struct script_spec *script_spec__new(const char *spec,
 584                                             struct scripting_ops *ops)
 585 {
 586         struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
 587
 588         if (s != NULL) {
 589                 strcpy(s->spec, spec);
 590                 s->ops = ops;
 591         }
 592
 593         return s;
 594 }
 595
 596 static void script_spec__add(struct script_spec *s)
 597 {
 598         list_add_tail(&s->node, &script_specs);
 599 }
 600
 601 static struct script_spec *script_spec__find(const char *spec)
 602 {
 603         struct script_spec *s;
 604
 605         list_for_each_entry(s, &script_specs, node)
 606                 if (strcasecmp(s->spec, spec) == 0)
 607                         return s;
 608         return NULL;
 609 }
 610
 611 static struct script_spec *script_spec__findnew(const char *spec,
 612                                                 struct scripting_ops *ops)
 613 {
 614         struct script_spec *s = script_spec__find(spec);
 615
 616         if (s)
 617                 return s;
 618
 619         s = script_spec__new(spec, ops);
 620         if (!s)
 621                 return NULL;
 622
 623         script_spec__add(s);
 624
 625         return s;
 626 }
 627
 628 int script_spec_register(const char *spec, struct scripting_ops *ops)
 629 {
 630         struct script_spec *s;
 631
 632         s = script_spec__find(spec);
 633         if (s)
 634                 return -1;
 635
 636         s = script_spec__findnew(spec, ops);
 637         if (!s)
 638                 return -1;
 639
 640         return 0;
 641 }
 642
 643 static struct scripting_ops *script_spec__lookup(const char *spec)
 644 {
 645         struct script_spec *s = script_spec__find(spec);
 646         if (!s)
 647                 return NULL;
 648
 649         return s->ops;
 650 }
 651
 652 static void list_available_languages(void)
 653 {
 654         struct script_spec *s;
 655
 656         fprintf(stderr, "\n");
 657         fprintf(stderr, "Scripting language extensions (used in "
 658                 "perf script -s [spec:]script.[spec]):\n\n");
 659
 660         list_for_each_entry(s, &script_specs, node)
 661                 fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
 662
 663         fprintf(stderr, "\n");
 664 }
 665
 666 static int parse_scriptname(const struct option *opt __maybe_unused,
 667                             const char *str, int unset __maybe_unused)
 668 {
 669         char spec[PATH_MAX];
 670         const char *script, *ext;
 671         int len;
 672
 673         if (strcmp(str, "lang") == 0) {
 674                 list_available_languages();
 675                 exit(0);
 676         }
 677
 678         script = strchr(str, ':');
 679         if (script) {
 680                 len = script - str;
 681                 if (len >= PATH_MAX) {
 682                         fprintf(stderr, "invalid language specifier");
 683                         return -1;
 684                 }
 685                 strncpy(spec, str, len);
 686                 spec[len] = '\0';
 687                 scripting_ops = script_spec__lookup(spec);
 688                 if (!scripting_ops) {
 689                         fprintf(stderr, "invalid language specifier");
 690                         return -1;
 691                 }
 692                 script++;
 693         } else {
 694                 script = str;
 695                 ext = strrchr(script, '.');
 696                 if (!ext) {
 697                         fprintf(stderr, "invalid script extension");
 698                         return -1;
 699                 }
 700                 scripting_ops = script_spec__lookup(++ext);
 701                 if (!scripting_ops) {
 702                         fprintf(stderr, "invalid script extension");
 703                         return -1;
 704                 }
 705         }
 706
 707         script_name = strdup(script);
 708
 709         return 0;
 710 }
 711
 712 static int parse_output_fields(const struct option *opt __maybe_unused,
 713                             const char *arg, int unset __maybe_unused)
 714 {
 715         char *tok;
 716         int i, imax = ARRAY_SIZE(all_output_options);
 717         int j;
 718         int rc = 0;
 719         char *str = strdup(arg);
 720         int type = -1;
 721
 722         if (!str)
 723                 return -ENOMEM;
 724
 725         /* first word can state for which event type the user is specifying
 726          * the fields. If no type exists, the specified fields apply to all
 727          * event types found in the file minus the invalid fields for a type.
 728          */
 729         tok = strchr(str, ':');
 730         if (tok) {
 731                 *tok = '\0';
 732                 tok++;
 733                 if (!strcmp(str, "hw"))
 734                         type = PERF_TYPE_HARDWARE;
 735                 else if (!strcmp(str, "sw"))
 736                         type = PERF_TYPE_SOFTWARE;
 737                 else if (!strcmp(str, "trace"))
 738                         type = PERF_TYPE_TRACEPOINT;
 739                 else if (!strcmp(str, "raw"))
 740                         type = PERF_TYPE_RAW;
 741                 else {
 742                         fprintf(stderr, "Invalid event type in field string.\n");
 743                         rc = -EINVAL;
 744                         goto out;
 745                 }
 746
 747                 if (output[type].user_set)
 748                         pr_warning("Overriding previous field request for %s events.\n",
 749                                    event_type(type));
 750
 751                 output[type].fields = 0;
 752                 output[type].user_set = true;
 753                 output[type].wildcard_set = false;
 754
 755         } else {
 756                 tok = str;
 757                 if (strlen(str) == 0) {
 758                         fprintf(stderr,
 759                                 "Cannot set fields to 'none' for all event types.\n");
 760                         rc = -EINVAL;
 761                         goto out;
 762                 }
 763
 764                 if (output_set_by_user())
 765                         pr_warning("Overriding previous field request for all events.\n");
 766
 767                 for (j = 0; j < PERF_TYPE_MAX; ++j) {
 768                         output[j].fields = 0;
 769                         output[j].user_set = true;
 770                         output[j].wildcard_set = true;
 771                 }
 772         }
 773
 774         tok = strtok(tok, ",");
 775         while (tok) {
 776                 for (i = 0; i < imax; ++i) {
 777                         if (strcmp(tok, all_output_options[i].str) == 0)
 778                                 break;
 779                 }
 780                 if (i == imax) {
 781                         fprintf(stderr, "Invalid field requested.\n");
 782                         rc = -EINVAL;
 783                         goto out;
 784                 }
 785
 786                 if (type == -1) {
 787                         /* add user option to all events types for
 788                          * which it is valid
 789                          */
 790                         for (j = 0; j < PERF_TYPE_MAX; ++j) {
 791                                 if (output[j].invalid_fields & all_output_options[i].field) {
 792                                         pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
 793                                                    all_output_options[i].str, event_type(j));
 794                                 } else
 795                                         output[j].fields |= all_output_options[i].field;
 796                         }
 797                 } else {
 798                         if (output[type].invalid_fields & all_output_options[i].field) {
 799                                 fprintf(stderr, "\'%s\' not valid for %s events.\n",
 800                                          all_output_options[i].str, event_type(type));
 801
 802                                 rc = -EINVAL;
 803                                 goto out;
 804                         }
 805                         output[type].fields |= all_output_options[i].field;
 806                 }
 807
 808                 tok = strtok(NULL, ",");
 809         }
 810
 811         if (type >= 0) {
 812                 if (output[type].fields == 0) {
 813                         pr_debug("No fields requested for %s type. "
 814                                  "Events will not be displayed.\n", event_type(type));
 815                 }
 816         }
 817
 818 out:
 819         free(str);
 820         return rc;
 821 }
 822
 823 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
 824 static int is_directory(const char *base_path, const struct dirent *dent)
 825 {
 826         char path[PATH_MAX];
 827         struct stat st;
 828
 829         sprintf(path, "%s/%s", base_path, dent->d_name);
 830         if (stat(path, &st))
 831                 return 0;
 832
 833         return S_ISDIR(st.st_mode);
 834 }
 835
 836 #define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
 837         while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&     \
 838                lang_next)                                               \
 839                 if ((lang_dirent.d_type == DT_DIR ||                    \
 840                      (lang_dirent.d_type == DT_UNKNOWN &&               \
 841                       is_directory(scripts_path, &lang_dirent))) &&     \
 842                     (strcmp(lang_dirent.d_name, ".")) &&                \
 843                     (strcmp(lang_dirent.d_name, "..")))
 844
 845 #define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
 846         while (!readdir_r(lang_dir, &script_dirent, &script_next) &&    \
 847                script_next)                                             \
 848                 if (script_dirent.d_type != DT_DIR &&                   \
 849                     (script_dirent.d_type != DT_UNKNOWN ||              \
 850                      !is_directory(lang_path, &script_dirent)))
 851
 852
 853 #define RECORD_SUFFIX                   "-record"
 854 #define REPORT_SUFFIX                   "-report"
 855
 856 struct script_desc {
 857         struct list_head        node;
 858         char                    *name;
 859         char                    *half_liner;
 860         char                    *args;
 861 };
 862
 863 static LIST_HEAD(script_descs);
 864
 865 static struct script_desc *script_desc__new(const char *name)
 866 {
 867         struct script_desc *s = zalloc(sizeof(*s));
 868
 869         if (s != NULL && name)
 870                 s->name = strdup(name);
 871
 872         return s;
 873 }
 874
 875 static void script_desc__delete(struct script_desc *s)
 876 {
 877         free(s->name);
 878         free(s->half_liner);
 879         free(s->args);
 880         free(s);
 881 }
 882
 883 static void script_desc__add(struct script_desc *s)
 884 {
 885         list_add_tail(&s->node, &script_descs);
 886 }
 887
 888 static struct script_desc *script_desc__find(const char *name)
 889 {
 890         struct script_desc *s;
 891
 892         list_for_each_entry(s, &script_descs, node)
 893                 if (strcasecmp(s->name, name) == 0)
 894                         return s;
 895         return NULL;
 896 }
 897
 898 static struct script_desc *script_desc__findnew(const char *name)
 899 {
 900         struct script_desc *s = script_desc__find(name);
 901
 902         if (s)
 903                 return s;
 904
 905         s = script_desc__new(name);
 906         if (!s)
 907                 goto out_delete_desc;
 908
 909         script_desc__add(s);
 910
 911         return s;
 912
 913 out_delete_desc:
 914         script_desc__delete(s);
 915
 916         return NULL;
 917 }
 918
 919 static const char *ends_with(const char *str, const char *suffix)
 920 {
 921         size_t suffix_len = strlen(suffix);
 922         const char *p = str;
 923
 924         if (strlen(str) > suffix_len) {
 925                 p = str + strlen(str) - suffix_len;
 926                 if (!strncmp(p, suffix, suffix_len))
 927                         return p;
 928         }
 929
 930         return NULL;
 931 }
 932
 933 static int read_script_info(struct script_desc *desc, const char *filename)
 934 {
 935         char line[BUFSIZ], *p;
 936         FILE *fp;
 937
 938         fp = fopen(filename, "r");
 939         if (!fp)
 940                 return -1;
 941
 942         while (fgets(line, sizeof(line), fp)) {
 943                 p = ltrim(line);
 944                 if (strlen(p) == 0)
 945                         continue;
 946                 if (*p != '#')
 947                         continue;
 948                 p++;
 949                 if (strlen(p) && *p == '!')
 950                         continue;
 951
 952                 p = ltrim(p);
 953                 if (strlen(p) && p[strlen(p) - 1] == '\n')
 954                         p[strlen(p) - 1] = '\0';
 955
 956                 if (!strncmp(p, "description:", strlen("description:"))) {
 957                         p += strlen("description:");
 958                         desc->half_liner = strdup(ltrim(p));
 959                         continue;
 960                 }
 961
 962                 if (!strncmp(p, "args:", strlen("args:"))) {
 963                         p += strlen("args:");
 964                         desc->args = strdup(ltrim(p));
 965                         continue;
 966                 }
 967         }
 968
 969         fclose(fp);
 970
 971         return 0;
 972 }
 973
 974 static char *get_script_root(struct dirent *script_dirent, const char *suffix)
 975 {
 976         char *script_root, *str;
 977
 978         script_root = strdup(script_dirent->d_name);
 979         if (!script_root)
 980                 return NULL;
 981
 982         str = (char *)ends_with(script_root, suffix);
 983         if (!str) {
 984                 free(script_root);
 985                 return NULL;
 986         }
 987
 988         *str = '\0';
 989         return script_root;
 990 }
 991
 992 static int list_available_scripts(const struct option *opt __maybe_unused,
 993                                   const char *s __maybe_unused,
 994                                   int unset __maybe_unused)
 995 {
 996         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
 997         char scripts_path[MAXPATHLEN];
 998         DIR *scripts_dir, *lang_dir;
 999         char script_path[MAXPATHLEN];
1000         char lang_path[MAXPATHLEN];
1001         struct script_desc *desc;
1002         char first_half[BUFSIZ];
1003         char *script_root;
1004
1005         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1006
1007         scripts_dir = opendir(scripts_path);
1008         if (!scripts_dir)
1009                 return -1;
1010
1011         for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1012                 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1013                          lang_dirent.d_name);
1014                 lang_dir = opendir(lang_path);
1015                 if (!lang_dir)
1016                         continue;
1017
1018                 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1019                         script_root = get_script_root(&script_dirent, REPORT_SUFFIX);
1020                         if (script_root) {
1021                                 desc = script_desc__findnew(script_root);
1022                                 snprintf(script_path, MAXPATHLEN, "%s/%s",
1023                                          lang_path, script_dirent.d_name);
1024                                 read_script_info(desc, script_path);
1025                                 free(script_root);
1026                         }
1027                 }
1028         }
1029
1030         fprintf(stdout, "List of available trace scripts:\n");
1031         list_for_each_entry(desc, &script_descs, node) {
1032                 sprintf(first_half, "%s %s", desc->name,
1033                         desc->args ? desc->args : "");
1034                 fprintf(stdout, "  %-36s %s\n", first_half,
1035                         desc->half_liner ? desc->half_liner : "");
1036         }
1037
1038         exit(0);
1039 }
1040
1041 /*
1042  * Some scripts specify the required events in their "xxx-record" file,
1043  * this function will check if the events in perf.data match those
1044  * mentioned in the "xxx-record".
1045  *
1046  * Fixme: All existing "xxx-record" are all in good formats "-e event ",
1047  * which is covered well now. And new parsing code should be added to
1048  * cover the future complexing formats like event groups etc.
1049  */
1050 static int check_ev_match(char *dir_name, char *scriptname,
1051                         struct perf_session *session)
1052 {
1053         char filename[MAXPATHLEN], evname[128];
1054         char line[BUFSIZ], *p;
1055         struct perf_evsel *pos;
1056         int match, len;
1057         FILE *fp;
1058
1059         sprintf(filename, "%s/bin/%s-record", dir_name, scriptname);
1060
1061         fp = fopen(filename, "r");
1062         if (!fp)
1063                 return -1;
1064
1065         while (fgets(line, sizeof(line), fp)) {
1066                 p = ltrim(line);
1067                 if (*p == '#')
1068                         continue;
1069
1070                 while (strlen(p)) {
1071                         p = strstr(p, "-e");
1072                         if (!p)
1073                                 break;
1074
1075                         p += 2;
1076                         p = ltrim(p);
1077                         len = strcspn(p, " \t");
1078                         if (!len)
1079                                 break;
1080
1081                         snprintf(evname, len + 1, "%s", p);
1082
1083                         match = 0;
1084                         list_for_each_entry(pos,
1085                                         &session->evlist->entries, node) {
1086                                 if (!strcmp(perf_evsel__name(pos), evname)) {
1087                                         match = 1;
1088                                         break;
1089                                 }
1090                         }
1091
1092                         if (!match) {
1093                                 fclose(fp);
1094                                 return -1;
1095                         }
1096                 }
1097         }
1098
1099         fclose(fp);
1100         return 0;
1101 }
1102
1103 /*
1104  * Return -1 if none is found, otherwise the actual scripts number.
1105  *
1106  * Currently the only user of this function is the script browser, which
1107  * will list all statically runnable scripts, select one, execute it and
1108  * show the output in a perf browser.
1109  */
1110 int find_scripts(char **scripts_array, char **scripts_path_array)
1111 {
1112         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
1113         char scripts_path[MAXPATHLEN], lang_path[MAXPATHLEN];
1114         DIR *scripts_dir, *lang_dir;
1115         struct perf_session *session;
1116         char *temp;
1117         int i = 0;
1118
1119         session = perf_session__new(input_name, O_RDONLY, 0, false, NULL);
1120         if (!session)
1121                 return -1;
1122
1123         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1124
1125         scripts_dir = opendir(scripts_path);
1126         if (!scripts_dir) {
1127                 perf_session__delete(session);
1128                 return -1;
1129         }
1130
1131         for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1132                 snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
1133                          lang_dirent.d_name);
1134 #ifdef NO_LIBPERL
1135                 if (strstr(lang_path, "perl"))
1136                         continue;
1137 #endif
1138 #ifdef NO_LIBPYTHON
1139                 if (strstr(lang_path, "python"))
1140                         continue;
1141 #endif
1142
1143                 lang_dir = opendir(lang_path);
1144                 if (!lang_dir)
1145                         continue;
1146
1147                 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1148                         /* Skip those real time scripts: xxxtop.p[yl] */
1149                         if (strstr(script_dirent.d_name, "top."))
1150                                 continue;
1151                         sprintf(scripts_path_array[i], "%s/%s", lang_path,
1152                                 script_dirent.d_name);
1153                         temp = strchr(script_dirent.d_name, '.');
1154                         snprintf(scripts_array[i],
1155                                 (temp - script_dirent.d_name) + 1,
1156                                 "%s", script_dirent.d_name);
1157
1158                         if (check_ev_match(lang_path,
1159                                         scripts_array[i], session))
1160                                 continue;
1161
1162                         i++;
1163                 }
1164                 closedir(lang_dir);
1165         }
1166
1167         closedir(scripts_dir);
1168         perf_session__delete(session);
1169         return i;
1170 }
1171
1172 static char *get_script_path(const char *script_root, const char *suffix)
1173 {
1174         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
1175         char scripts_path[MAXPATHLEN];
1176         char script_path[MAXPATHLEN];
1177         DIR *scripts_dir, *lang_dir;
1178         char lang_path[MAXPATHLEN];
1179         char *__script_root;
1180
1181         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1182
1183         scripts_dir = opendir(scripts_path);
1184         if (!scripts_dir)
1185                 return NULL;
1186
1187         for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1188                 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1189                          lang_dirent.d_name);
1190                 lang_dir = opendir(lang_path);
1191                 if (!lang_dir)
1192                         continue;
1193
1194                 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1195                         __script_root = get_script_root(&script_dirent, suffix);
1196                         if (__script_root && !strcmp(script_root, __script_root)) {
1197                                 free(__script_root);
1198                                 closedir(lang_dir);
1199                                 closedir(scripts_dir);
1200                                 snprintf(script_path, MAXPATHLEN, "%s/%s",
1201                                          lang_path, script_dirent.d_name);
1202                                 return strdup(script_path);
1203                         }
1204                         free(__script_root);
1205                 }
1206                 closedir(lang_dir);
1207         }
1208         closedir(scripts_dir);
1209
1210         return NULL;
1211 }
1212
1213 static bool is_top_script(const char *script_path)
1214 {
1215         return ends_with(script_path, "top") == NULL ? false : true;
1216 }
1217
1218 static int has_required_arg(char *script_path)
1219 {
1220         struct script_desc *desc;
1221         int n_args = 0;
1222         char *p;
1223
1224         desc = script_desc__new(NULL);
1225
1226         if (read_script_info(desc, script_path))
1227                 goto out;
1228
1229         if (!desc->args)
1230                 goto out;
1231
1232         for (p = desc->args; *p; p++)
1233                 if (*p == '<')
1234                         n_args++;
1235 out:
1236         script_desc__delete(desc);
1237
1238         return n_args;
1239 }
1240
1241 static int have_cmd(int argc, const char **argv)
1242 {
1243         char **__argv = malloc(sizeof(const char *) * argc);
1244
1245         if (!__argv) {
1246                 pr_err("malloc failed\n");
1247                 return -1;
1248         }
1249
1250         memcpy(__argv, argv, sizeof(const char *) * argc);
1251         argc = parse_options(argc, (const char **)__argv, record_options,
1252                              NULL, PARSE_OPT_STOP_AT_NON_OPTION);
1253         free(__argv);
1254
1255         system_wide = (argc == 0);
1256
1257         return 0;
1258 }
1259
1260 int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
1261 {
1262         bool show_full_info = false;
1263         char *rec_script_path = NULL;
1264         char *rep_script_path = NULL;
1265         struct perf_session *session;
1266         char *script_path = NULL;
1267         const char **__argv;
1268         int i, j, err;
1269         const struct option options[] = {
1270         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1271                     "dump raw trace in ASCII"),
1272         OPT_INCR('v', "verbose", &verbose,
1273                  "be more verbose (show symbol address, etc)"),
1274         OPT_BOOLEAN('L', "Latency", &latency_format,
1275                     "show latency attributes (irqs/preemption disabled, etc)"),
1276         OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
1277                            list_available_scripts),
1278         OPT_CALLBACK('s', "script", NULL, "name",
1279                      "script file name (lang:script name, script name, or *)",
1280                      parse_scriptname),
1281         OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
1282                    "generate perf-script.xx script in specified language"),
1283         OPT_STRING('i', "input", &input_name, "file", "input file name"),
1284         OPT_BOOLEAN('d', "debug-mode", &debug_mode,
1285                    "do various checks like samples ordering and lost events"),
1286         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1287                    "file", "vmlinux pathname"),
1288         OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1289                    "file", "kallsyms pathname"),
1290         OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
1291                     "When printing symbols do not display call chain"),
1292         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1293                     "Look for files with symbols relative to this directory"),
1294         OPT_CALLBACK('f', "fields", NULL, "str",
1295                      "comma separated output fields prepend with 'type:'. "
1296                      "Valid types: hw,sw,trace,raw. "
1297                      "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
1298                      "addr,symoff", parse_output_fields),
1299         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1300                     "system-wide collection from all CPUs"),
1301         OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1302                    "only consider these symbols"),
1303         OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1304         OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1305                    "only display events for these comms"),
1306         OPT_BOOLEAN('I', "show-info", &show_full_info,
1307                     "display extended information from perf.data file"),
1308         OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
1309                     "Show the path of [kernel.kallsyms]"),
1310         OPT_END()
1311         };
1312         const char * const script_usage[] = {
1313                 "perf script [<options>]",
1314                 "perf script [<options>] record <script> [<record-options>] <command>",
1315                 "perf script [<options>] report <script> [script-args]",
1316                 "perf script [<options>] <script> [<record-options>] <command>",
1317                 "perf script [<options>] <top-script> [script-args]",
1318                 NULL
1319         };
1320
1321         setup_scripting();
1322
1323         argc = parse_options(argc, argv, options, script_usage,
1324                              PARSE_OPT_STOP_AT_NON_OPTION);
1325
1326         if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
1327                 rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
1328                 if (!rec_script_path)
1329                         return cmd_record(argc, argv, NULL);
1330         }
1331
1332         if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
1333                 rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
1334                 if (!rep_script_path) {
1335                         fprintf(stderr,
1336                                 "Please specify a valid report script"
1337                                 "(see 'perf script -l' for listing)\n");
1338                         return -1;
1339                 }
1340         }
1341
1342         /* make sure PERF_EXEC_PATH is set for scripts */
1343         perf_set_argv_exec_path(perf_exec_path());
1344
1345         if (argc && !script_name && !rec_script_path && !rep_script_path) {
1346                 int live_pipe[2];
1347                 int rep_args;
1348                 pid_t pid;
1349
1350                 rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
1351                 rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
1352
1353                 if (!rec_script_path && !rep_script_path) {
1354                         fprintf(stderr, " Couldn't find script %s\n\n See perf"
1355                                 " script -l for available scripts.\n", argv[0]);
1356                         usage_with_options(script_usage, options);
1357                 }
1358
1359                 if (is_top_script(argv[0])) {
1360                         rep_args = argc - 1;
1361                 } else {
1362                         int rec_args;
1363
1364                         rep_args = has_required_arg(rep_script_path);
1365                         rec_args = (argc - 1) - rep_args;
1366                         if (rec_args < 0) {
1367                                 fprintf(stderr, " %s script requires options."
1368                                         "\n\n See perf script -l for available "
1369                                         "scripts and options.\n", argv[0]);
1370                                 usage_with_options(script_usage, options);
1371                         }
1372                 }
1373
1374                 if (pipe(live_pipe) < 0) {
1375                         perror("failed to create pipe");
1376                         return -1;
1377                 }
1378
1379                 pid = fork();
1380                 if (pid < 0) {
1381                         perror("failed to fork");
1382                         return -1;
1383                 }
1384
1385                 if (!pid) {
1386                         j = 0;
1387
1388                         dup2(live_pipe[1], 1);
1389                         close(live_pipe[0]);
1390
1391                         if (is_top_script(argv[0])) {
1392                                 system_wide = true;
1393                         } else if (!system_wide) {
1394                                 if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
1395                                         err = -1;
1396                                         goto out;
1397                                 }
1398                         }
1399
1400                         __argv = malloc((argc + 6) * sizeof(const char *));
1401                         if (!__argv) {
1402                                 pr_err("malloc failed\n");
1403                                 err = -ENOMEM;
1404                                 goto out;
1405                         }
1406
1407                         __argv[j++] = "/bin/sh";
1408                         __argv[j++] = rec_script_path;
1409                         if (system_wide)
1410                                 __argv[j++] = "-a";
1411                         __argv[j++] = "-q";
1412                         __argv[j++] = "-o";
1413                         __argv[j++] = "-";
1414                         for (i = rep_args + 1; i < argc; i++)
1415                                 __argv[j++] = argv[i];
1416                         __argv[j++] = NULL;
1417
1418                         execvp("/bin/sh", (char **)__argv);
1419                         free(__argv);
1420                         exit(-1);
1421                 }
1422
1423                 dup2(live_pipe[0], 0);
1424                 close(live_pipe[1]);
1425
1426                 __argv = malloc((argc + 4) * sizeof(const char *));
1427                 if (!__argv) {
1428                         pr_err("malloc failed\n");
1429                         err = -ENOMEM;
1430                         goto out;
1431                 }
1432
1433                 j = 0;
1434                 __argv[j++] = "/bin/sh";
1435                 __argv[j++] = rep_script_path;
1436                 for (i = 1; i < rep_args + 1; i++)
1437                         __argv[j++] = argv[i];
1438                 __argv[j++] = "-i";
1439                 __argv[j++] = "-";
1440                 __argv[j++] = NULL;
1441
1442                 execvp("/bin/sh", (char **)__argv);
1443                 free(__argv);
1444                 exit(-1);
1445         }
1446
1447         if (rec_script_path)
1448                 script_path = rec_script_path;
1449         if (rep_script_path)
1450                 script_path = rep_script_path;
1451
1452         if (script_path) {
1453                 j = 0;
1454
1455                 if (!rec_script_path)
1456                         system_wide = false;
1457                 else if (!system_wide) {
1458                         if (have_cmd(argc - 1, &argv[1]) != 0) {
1459                                 err = -1;
1460                                 goto out;
1461                         }
1462                 }
1463
1464                 __argv = malloc((argc + 2) * sizeof(const char *));
1465                 if (!__argv) {
1466                         pr_err("malloc failed\n");
1467                         err = -ENOMEM;
1468                         goto out;
1469                 }
1470
1471                 __argv[j++] = "/bin/sh";
1472                 __argv[j++] = script_path;
1473                 if (system_wide)
1474                         __argv[j++] = "-a";
1475                 for (i = 2; i < argc; i++)
1476                         __argv[j++] = argv[i];
1477                 __argv[j++] = NULL;
1478
1479                 execvp("/bin/sh", (char **)__argv);
1480                 free(__argv);
1481                 exit(-1);
1482         }
1483
1484         if (symbol__init() < 0)
1485                 return -1;
1486         if (!script_name)
1487                 setup_pager();
1488
1489         session = perf_session__new(input_name, O_RDONLY, 0, false,
1490                                     &perf_script);
1491         if (session == NULL)
1492                 return -ENOMEM;
1493
1494         if (cpu_list) {
1495                 if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
1496                         return -1;
1497         }
1498
1499         if (!script_name && !generate_script_lang)
1500                 perf_session__fprintf_info(session, stdout, show_full_info);
1501
1502         if (!no_callchain)
1503                 symbol_conf.use_callchain = true;
1504         else
1505                 symbol_conf.use_callchain = false;
1506
1507         if (generate_script_lang) {
1508                 struct stat perf_stat;
1509                 int input;
1510
1511                 if (output_set_by_user()) {
1512                         fprintf(stderr,
1513                                 "custom fields not supported for generated scripts");
1514                         return -1;
1515                 }
1516
1517                 input = open(session->filename, O_RDONLY);      /* input_name */
1518                 if (input < 0) {
1519                         perror("failed to open file");
1520                         return -1;
1521                 }
1522
1523                 err = fstat(input, &perf_stat);
1524                 if (err < 0) {
1525                         perror("failed to stat file");
1526                         return -1;
1527                 }
1528
1529                 if (!perf_stat.st_size) {
1530                         fprintf(stderr, "zero-sized file, nothing to do!\n");
1531                         return 0;
1532                 }
1533
1534                 scripting_ops = script_spec__lookup(generate_script_lang);
1535                 if (!scripting_ops) {
1536                         fprintf(stderr, "invalid language specifier");
1537                         return -1;
1538                 }
1539
1540                 err = scripting_ops->generate_script(session->pevent,
1541                                                      "perf-script");
1542                 goto out;
1543         }
1544
1545         if (script_name) {
1546                 err = scripting_ops->start_script(script_name, argc, argv);
1547                 if (err)
1548                         goto out;
1549                 pr_debug("perf script started with script %s\n\n", script_name);
1550         }
1551
1552
1553         err = perf_session__check_output_opt(session);
1554         if (err < 0)
1555                 goto out;
1556
1557         err = __cmd_script(session);
1558
1559         perf_session__delete(session);
1560         cleanup_scripting();
1561 out:
1562         return err;
1563 }