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