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