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/symbol.h"
  11 #include "util/thread.h"
  12 #include "util/trace-event.h"
  13 #include "util/parse-options.h"
  14 #include "util/util.h"
  15
  16 static char const               *script_name;
  17 static char const               *generate_script_lang;
  18 static bool                     debug_mode;
  19 static u64                      last_timestamp;
  20 static u64                      nr_unordered;
  21 extern const struct option      record_options[];
  22
  23 static int default_start_script(const char *script __unused,
  24                                 int argc __unused,
  25                                 const char **argv __unused)
  26 {
  27         return 0;
  28 }
  29
  30 static int default_stop_script(void)
  31 {
  32         return 0;
  33 }
  34
  35 static int default_generate_script(const char *outfile __unused)
  36 {
  37         return 0;
  38 }
  39
  40 static struct scripting_ops default_scripting_ops = {
  41         .start_script           = default_start_script,
  42         .stop_script            = default_stop_script,
  43         .process_event          = print_event,
  44         .generate_script        = default_generate_script,
  45 };
  46
  47 static struct scripting_ops     *scripting_ops;
  48
  49 static void setup_scripting(void)
  50 {
  51         setup_perl_scripting();
  52         setup_python_scripting();
  53
  54         scripting_ops = &default_scripting_ops;
  55 }
  56
  57 static int cleanup_scripting(void)
  58 {
  59         pr_debug("\nperf script stopped\n");
  60
  61         return scripting_ops->stop_script();
  62 }
  63
  64 static char const               *input_name = "perf.data";
  65
  66 static int process_sample_event(event_t *event, struct perf_session *session)
  67 {
  68         struct sample_data data;
  69         struct thread *thread;
  70
  71         memset(&data, 0, sizeof(data));
  72         data.time = -1;
  73         data.cpu = -1;
  74         data.period = 1;
  75
  76         event__parse_sample(event, session->sample_type, &data);
  77
  78         dump_printf("(IP, %d): %d/%d: %#Lx period: %Ld\n", event->header.misc,
  79                     data.pid, data.tid, data.ip, data.period);
  80
  81         thread = perf_session__findnew(session, event->ip.pid);
  82         if (thread == NULL) {
  83                 pr_debug("problem processing %d event, skipping it.\n",
  84                          event->header.type);
  85                 return -1;
  86         }
  87
  88         if (session->sample_type & PERF_SAMPLE_RAW) {
  89                 if (debug_mode) {
  90                         if (data.time < last_timestamp) {
  91                                 pr_err("Samples misordered, previous: %llu "
  92                                         "this: %llu\n", last_timestamp,
  93                                         data.time);
  94                                 nr_unordered++;
  95                         }
  96                         last_timestamp = data.time;
  97                         return 0;
  98                 }
  99                 /*
 100                  * FIXME: better resolve from pid from the struct trace_entry
 101                  * field, although it should be the same than this perf
 102                  * event pid
 103                  */
 104                 scripting_ops->process_event(data.cpu, data.raw_data,
 105                                              data.raw_size,
 106                                              data.time, thread->comm);
 107         }
 108
 109         session->hists.stats.total_period += data.period;
 110         return 0;
 111 }
 112
 113 static u64 nr_lost;
 114
 115 static int process_lost_event(event_t *event, struct perf_session *session __used)
 116 {
 117         nr_lost += event->lost.lost;
 118
 119         return 0;
 120 }
 121
 122 static struct perf_event_ops event_ops = {
 123         .sample = process_sample_event,
 124         .comm   = event__process_comm,
 125         .attr   = event__process_attr,
 126         .event_type = event__process_event_type,
 127         .tracing_data = event__process_tracing_data,
 128         .build_id = event__process_build_id,
 129         .lost = process_lost_event,
 130         .ordered_samples = true,
 131 };
 132
 133 extern volatile int session_done;
 134
 135 static void sig_handler(int sig __unused)
 136 {
 137         session_done = 1;
 138 }
 139
 140 static int __cmd_script(struct perf_session *session)
 141 {
 142         int ret;
 143
 144         signal(SIGINT, sig_handler);
 145
 146         ret = perf_session__process_events(session, &event_ops);
 147
 148         if (debug_mode) {
 149                 pr_err("Misordered timestamps: %llu\n", nr_unordered);
 150                 pr_err("Lost events: %llu\n", nr_lost);
 151         }
 152
 153         return ret;
 154 }
 155
 156 struct script_spec {
 157         struct list_head        node;
 158         struct scripting_ops    *ops;
 159         char                    spec[0];
 160 };
 161
 162 LIST_HEAD(script_specs);
 163
 164 static struct script_spec *script_spec__new(const char *spec,
 165                                             struct scripting_ops *ops)
 166 {
 167         struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
 168
 169         if (s != NULL) {
 170                 strcpy(s->spec, spec);
 171                 s->ops = ops;
 172         }
 173
 174         return s;
 175 }
 176
 177 static void script_spec__delete(struct script_spec *s)
 178 {
 179         free(s->spec);
 180         free(s);
 181 }
 182
 183 static void script_spec__add(struct script_spec *s)
 184 {
 185         list_add_tail(&s->node, &script_specs);
 186 }
 187
 188 static struct script_spec *script_spec__find(const char *spec)
 189 {
 190         struct script_spec *s;
 191
 192         list_for_each_entry(s, &script_specs, node)
 193                 if (strcasecmp(s->spec, spec) == 0)
 194                         return s;
 195         return NULL;
 196 }
 197
 198 static struct script_spec *script_spec__findnew(const char *spec,
 199                                                 struct scripting_ops *ops)
 200 {
 201         struct script_spec *s = script_spec__find(spec);
 202
 203         if (s)
 204                 return s;
 205
 206         s = script_spec__new(spec, ops);
 207         if (!s)
 208                 goto out_delete_spec;
 209
 210         script_spec__add(s);
 211
 212         return s;
 213
 214 out_delete_spec:
 215         script_spec__delete(s);
 216
 217         return NULL;
 218 }
 219
 220 int script_spec_register(const char *spec, struct scripting_ops *ops)
 221 {
 222         struct script_spec *s;
 223
 224         s = script_spec__find(spec);
 225         if (s)
 226                 return -1;
 227
 228         s = script_spec__findnew(spec, ops);
 229         if (!s)
 230                 return -1;
 231
 232         return 0;
 233 }
 234
 235 static struct scripting_ops *script_spec__lookup(const char *spec)
 236 {
 237         struct script_spec *s = script_spec__find(spec);
 238         if (!s)
 239                 return NULL;
 240
 241         return s->ops;
 242 }
 243
 244 static void list_available_languages(void)
 245 {
 246         struct script_spec *s;
 247
 248         fprintf(stderr, "\n");
 249         fprintf(stderr, "Scripting language extensions (used in "
 250                 "perf script -s [spec:]script.[spec]):\n\n");
 251
 252         list_for_each_entry(s, &script_specs, node)
 253                 fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
 254
 255         fprintf(stderr, "\n");
 256 }
 257
 258 static int parse_scriptname(const struct option *opt __used,
 259                             const char *str, int unset __used)
 260 {
 261         char spec[PATH_MAX];
 262         const char *script, *ext;
 263         int len;
 264
 265         if (strcmp(str, "lang") == 0) {
 266                 list_available_languages();
 267                 exit(0);
 268         }
 269
 270         script = strchr(str, ':');
 271         if (script) {
 272                 len = script - str;
 273                 if (len >= PATH_MAX) {
 274                         fprintf(stderr, "invalid language specifier");
 275                         return -1;
 276                 }
 277                 strncpy(spec, str, len);
 278                 spec[len] = '\0';
 279                 scripting_ops = script_spec__lookup(spec);
 280                 if (!scripting_ops) {
 281                         fprintf(stderr, "invalid language specifier");
 282                         return -1;
 283                 }
 284                 script++;
 285         } else {
 286                 script = str;
 287                 ext = strrchr(script, '.');
 288                 if (!ext) {
 289                         fprintf(stderr, "invalid script extension");
 290                         return -1;
 291                 }
 292                 scripting_ops = script_spec__lookup(++ext);
 293                 if (!scripting_ops) {
 294                         fprintf(stderr, "invalid script extension");
 295                         return -1;
 296                 }
 297         }
 298
 299         script_name = strdup(script);
 300
 301         return 0;
 302 }
 303
 304 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
 305 static int is_directory(const char *base_path, const struct dirent *dent)
 306 {
 307         char path[PATH_MAX];
 308         struct stat st;
 309
 310         sprintf(path, "%s/%s", base_path, dent->d_name);
 311         if (stat(path, &st))
 312                 return 0;
 313
 314         return S_ISDIR(st.st_mode);
 315 }
 316
 317 #define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
 318         while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&     \
 319                lang_next)                                               \
 320                 if ((lang_dirent.d_type == DT_DIR ||                    \
 321                      (lang_dirent.d_type == DT_UNKNOWN &&               \
 322                       is_directory(scripts_path, &lang_dirent))) &&     \
 323                     (strcmp(lang_dirent.d_name, ".")) &&                \
 324                     (strcmp(lang_dirent.d_name, "..")))
 325
 326 #define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
 327         while (!readdir_r(lang_dir, &script_dirent, &script_next) &&    \
 328                script_next)                                             \
 329                 if (script_dirent.d_type != DT_DIR &&                   \
 330                     (script_dirent.d_type != DT_UNKNOWN ||              \
 331                      !is_directory(lang_path, &script_dirent)))
 332
 333
 334 #define RECORD_SUFFIX                   "-record"
 335 #define REPORT_SUFFIX                   "-report"
 336
 337 struct script_desc {
 338         struct list_head        node;
 339         char                    *name;
 340         char                    *half_liner;
 341         char                    *args;
 342 };
 343
 344 LIST_HEAD(script_descs);
 345
 346 static struct script_desc *script_desc__new(const char *name)
 347 {
 348         struct script_desc *s = zalloc(sizeof(*s));
 349
 350         if (s != NULL && name)
 351                 s->name = strdup(name);
 352
 353         return s;
 354 }
 355
 356 static void script_desc__delete(struct script_desc *s)
 357 {
 358         free(s->name);
 359         free(s->half_liner);
 360         free(s->args);
 361         free(s);
 362 }
 363
 364 static void script_desc__add(struct script_desc *s)
 365 {
 366         list_add_tail(&s->node, &script_descs);
 367 }
 368
 369 static struct script_desc *script_desc__find(const char *name)
 370 {
 371         struct script_desc *s;
 372
 373         list_for_each_entry(s, &script_descs, node)
 374                 if (strcasecmp(s->name, name) == 0)
 375                         return s;
 376         return NULL;
 377 }
 378
 379 static struct script_desc *script_desc__findnew(const char *name)
 380 {
 381         struct script_desc *s = script_desc__find(name);
 382
 383         if (s)
 384                 return s;
 385
 386         s = script_desc__new(name);
 387         if (!s)
 388                 goto out_delete_desc;
 389
 390         script_desc__add(s);
 391
 392         return s;
 393
 394 out_delete_desc:
 395         script_desc__delete(s);
 396
 397         return NULL;
 398 }
 399
 400 static char *ends_with(char *str, const char *suffix)
 401 {
 402         size_t suffix_len = strlen(suffix);
 403         char *p = str;
 404
 405         if (strlen(str) > suffix_len) {
 406                 p = str + strlen(str) - suffix_len;
 407                 if (!strncmp(p, suffix, suffix_len))
 408                         return p;
 409         }
 410
 411         return NULL;
 412 }
 413
 414 static char *ltrim(char *str)
 415 {
 416         int len = strlen(str);
 417
 418         while (len && isspace(*str)) {
 419                 len--;
 420                 str++;
 421         }
 422
 423         return str;
 424 }
 425
 426 static int read_script_info(struct script_desc *desc, const char *filename)
 427 {
 428         char line[BUFSIZ], *p;
 429         FILE *fp;
 430
 431         fp = fopen(filename, "r");
 432         if (!fp)
 433                 return -1;
 434
 435         while (fgets(line, sizeof(line), fp)) {
 436                 p = ltrim(line);
 437                 if (strlen(p) == 0)
 438                         continue;
 439                 if (*p != '#')
 440                         continue;
 441                 p++;
 442                 if (strlen(p) && *p == '!')
 443                         continue;
 444
 445                 p = ltrim(p);
 446                 if (strlen(p) && p[strlen(p) - 1] == '\n')
 447                         p[strlen(p) - 1] = '\0';
 448
 449                 if (!strncmp(p, "description:", strlen("description:"))) {
 450                         p += strlen("description:");
 451                         desc->half_liner = strdup(ltrim(p));
 452                         continue;
 453                 }
 454
 455                 if (!strncmp(p, "args:", strlen("args:"))) {
 456                         p += strlen("args:");
 457                         desc->args = strdup(ltrim(p));
 458                         continue;
 459                 }
 460         }
 461
 462         fclose(fp);
 463
 464         return 0;
 465 }
 466
 467 static int list_available_scripts(const struct option *opt __used,
 468                                   const char *s __used, int unset __used)
 469 {
 470         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
 471         char scripts_path[MAXPATHLEN];
 472         DIR *scripts_dir, *lang_dir;
 473         char script_path[MAXPATHLEN];
 474         char lang_path[MAXPATHLEN];
 475         struct script_desc *desc;
 476         char first_half[BUFSIZ];
 477         char *script_root;
 478         char *str;
 479
 480         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
 481
 482         scripts_dir = opendir(scripts_path);
 483         if (!scripts_dir)
 484                 return -1;
 485
 486         for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
 487                 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
 488                          lang_dirent.d_name);
 489                 lang_dir = opendir(lang_path);
 490                 if (!lang_dir)
 491                         continue;
 492
 493                 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
 494                         script_root = strdup(script_dirent.d_name);
 495                         str = ends_with(script_root, REPORT_SUFFIX);
 496                         if (str) {
 497                                 *str = '\0';
 498                                 desc = script_desc__findnew(script_root);
 499                                 snprintf(script_path, MAXPATHLEN, "%s/%s",
 500                                          lang_path, script_dirent.d_name);
 501                                 read_script_info(desc, script_path);
 502                         }
 503                         free(script_root);
 504                 }
 505         }
 506
 507         fprintf(stdout, "List of available trace scripts:\n");
 508         list_for_each_entry(desc, &script_descs, node) {
 509                 sprintf(first_half, "%s %s", desc->name,
 510                         desc->args ? desc->args : "");
 511                 fprintf(stdout, "  %-36s %s\n", first_half,
 512                         desc->half_liner ? desc->half_liner : "");
 513         }
 514
 515         exit(0);
 516 }
 517
 518 static char *get_script_path(const char *script_root, const char *suffix)
 519 {
 520         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
 521         char scripts_path[MAXPATHLEN];
 522         char script_path[MAXPATHLEN];
 523         DIR *scripts_dir, *lang_dir;
 524         char lang_path[MAXPATHLEN];
 525         char *str, *__script_root;
 526         char *path = NULL;
 527
 528         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
 529
 530         scripts_dir = opendir(scripts_path);
 531         if (!scripts_dir)
 532                 return NULL;
 533
 534         for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
 535                 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
 536                          lang_dirent.d_name);
 537                 lang_dir = opendir(lang_path);
 538                 if (!lang_dir)
 539                         continue;
 540
 541                 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
 542                         __script_root = strdup(script_dirent.d_name);
 543                         str = ends_with(__script_root, suffix);
 544                         if (str) {
 545                                 *str = '\0';
 546                                 if (strcmp(__script_root, script_root))
 547                                         continue;
 548                                 snprintf(script_path, MAXPATHLEN, "%s/%s",
 549                                          lang_path, script_dirent.d_name);
 550                                 path = strdup(script_path);
 551                                 free(__script_root);
 552                                 break;
 553                         }
 554                         free(__script_root);
 555                 }
 556         }
 557
 558         return path;
 559 }
 560
 561 static bool is_top_script(const char *script_path)
 562 {
 563         return ends_with((char *)script_path, "top") == NULL ? false : true;
 564 }
 565
 566 static int has_required_arg(char *script_path)
 567 {
 568         struct script_desc *desc;
 569         int n_args = 0;
 570         char *p;
 571
 572         desc = script_desc__new(NULL);
 573
 574         if (read_script_info(desc, script_path))
 575                 goto out;
 576
 577         if (!desc->args)
 578                 goto out;
 579
 580         for (p = desc->args; *p; p++)
 581                 if (*p == '<')
 582                         n_args++;
 583 out:
 584         script_desc__delete(desc);
 585
 586         return n_args;
 587 }
 588
 589 static const char * const script_usage[] = {
 590         "perf script [<options>]",
 591         "perf script [<options>] record <script> [<record-options>] <command>",
 592         "perf script [<options>] report <script> [script-args]",
 593         "perf script [<options>] <script> [<record-options>] <command>",
 594         "perf script [<options>] <top-script> [script-args]",
 595         NULL
 596 };
 597
 598 static const struct option options[] = {
 599         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
 600                     "dump raw trace in ASCII"),
 601         OPT_INCR('v', "verbose", &verbose,
 602                     "be more verbose (show symbol address, etc)"),
 603         OPT_BOOLEAN('L', "Latency", &latency_format,
 604                     "show latency attributes (irqs/preemption disabled, etc)"),
 605         OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
 606                            list_available_scripts),
 607         OPT_CALLBACK('s', "script", NULL, "name",
 608                      "script file name (lang:script name, script name, or *)",
 609                      parse_scriptname),
 610         OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
 611                    "generate perf-script.xx script in specified language"),
 612         OPT_STRING('i', "input", &input_name, "file",
 613                     "input file name"),
 614         OPT_BOOLEAN('d', "debug-mode", &debug_mode,
 615                    "do various checks like samples ordering and lost events"),
 616
 617         OPT_END()
 618 };
 619
 620 static bool have_cmd(int argc, const char **argv)
 621 {
 622         char **__argv = malloc(sizeof(const char *) * argc);
 623
 624         if (!__argv)
 625                 die("malloc");
 626         memcpy(__argv, argv, sizeof(const char *) * argc);
 627         argc = parse_options(argc, (const char **)__argv, record_options,
 628                              NULL, PARSE_OPT_STOP_AT_NON_OPTION);
 629         free(__argv);
 630
 631         return argc != 0;
 632 }
 633
 634 int cmd_script(int argc, const char **argv, const char *prefix __used)
 635 {
 636         char *rec_script_path = NULL;
 637         char *rep_script_path = NULL;
 638         struct perf_session *session;
 639         char *script_path = NULL;
 640         const char **__argv;
 641         bool system_wide;
 642         int i, j, err;
 643
 644         setup_scripting();
 645
 646         argc = parse_options(argc, argv, options, script_usage,
 647                              PARSE_OPT_STOP_AT_NON_OPTION);
 648
 649         if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
 650                 rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
 651                 if (!rec_script_path)
 652                         return cmd_record(argc, argv, NULL);
 653         }
 654
 655         if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
 656                 rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
 657                 if (!rep_script_path) {
 658                         fprintf(stderr,
 659                                 "Please specify a valid report script"
 660                                 "(see 'perf script -l' for listing)\n");
 661                         return -1;
 662                 }
 663         }
 664
 665         /* make sure PERF_EXEC_PATH is set for scripts */
 666         perf_set_argv_exec_path(perf_exec_path());
 667
 668         if (argc && !script_name && !rec_script_path && !rep_script_path) {
 669                 int live_pipe[2];
 670                 int rep_args;
 671                 pid_t pid;
 672
 673                 rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
 674                 rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
 675
 676                 if (!rec_script_path && !rep_script_path) {
 677                         fprintf(stderr, " Couldn't find script %s\n\n See perf"
 678                                 " script -l for available scripts.\n", argv[0]);
 679                         usage_with_options(script_usage, options);
 680                 }
 681
 682                 if (is_top_script(argv[0])) {
 683                         rep_args = argc - 1;
 684                 } else {
 685                         int rec_args;
 686
 687                         rep_args = has_required_arg(rep_script_path);
 688                         rec_args = (argc - 1) - rep_args;
 689                         if (rec_args < 0) {
 690                                 fprintf(stderr, " %s script requires options."
 691                                         "\n\n See perf script -l for available "
 692                                         "scripts and options.\n", argv[0]);
 693                                 usage_with_options(script_usage, options);
 694                         }
 695                 }
 696
 697                 if (pipe(live_pipe) < 0) {
 698                         perror("failed to create pipe");
 699                         exit(-1);
 700                 }
 701
 702                 pid = fork();
 703                 if (pid < 0) {
 704                         perror("failed to fork");
 705                         exit(-1);
 706                 }
 707
 708                 if (!pid) {
 709                         system_wide = true;
 710                         j = 0;
 711
 712                         dup2(live_pipe[1], 1);
 713                         close(live_pipe[0]);
 714
 715                         if (!is_top_script(argv[0]))
 716                                 system_wide = !have_cmd(argc - rep_args,
 717                                                         &argv[rep_args]);
 718
 719                         __argv = malloc((argc + 6) * sizeof(const char *));
 720                         if (!__argv)
 721                                 die("malloc");
 722
 723                         __argv[j++] = "/bin/sh";
 724                         __argv[j++] = rec_script_path;
 725                         if (system_wide)
 726                                 __argv[j++] = "-a";
 727                         __argv[j++] = "-q";
 728                         __argv[j++] = "-o";
 729                         __argv[j++] = "-";
 730                         for (i = rep_args + 1; i < argc; i++)
 731                                 __argv[j++] = argv[i];
 732                         __argv[j++] = NULL;
 733
 734                         execvp("/bin/sh", (char **)__argv);
 735                         free(__argv);
 736                         exit(-1);
 737                 }
 738
 739                 dup2(live_pipe[0], 0);
 740                 close(live_pipe[1]);
 741
 742                 __argv = malloc((argc + 4) * sizeof(const char *));
 743                 if (!__argv)
 744                         die("malloc");
 745                 j = 0;
 746                 __argv[j++] = "/bin/sh";
 747                 __argv[j++] = rep_script_path;
 748                 for (i = 1; i < rep_args + 1; i++)
 749                         __argv[j++] = argv[i];
 750                 __argv[j++] = "-i";
 751                 __argv[j++] = "-";
 752                 __argv[j++] = NULL;
 753
 754                 execvp("/bin/sh", (char **)__argv);
 755                 free(__argv);
 756                 exit(-1);
 757         }
 758
 759         if (rec_script_path)
 760                 script_path = rec_script_path;
 761         if (rep_script_path)
 762                 script_path = rep_script_path;
 763
 764         if (script_path) {
 765                 system_wide = false;
 766                 j = 0;
 767
 768                 if (rec_script_path)
 769                         system_wide = !have_cmd(argc - 1, &argv[1]);
 770
 771                 __argv = malloc((argc + 2) * sizeof(const char *));
 772                 if (!__argv)
 773                         die("malloc");
 774                 __argv[j++] = "/bin/sh";
 775                 __argv[j++] = script_path;
 776                 if (system_wide)
 777                         __argv[j++] = "-a";
 778                 for (i = 2; i < argc; i++)
 779                         __argv[j++] = argv[i];
 780                 __argv[j++] = NULL;
 781
 782                 execvp("/bin/sh", (char **)__argv);
 783                 free(__argv);
 784                 exit(-1);
 785         }
 786
 787         if (symbol__init() < 0)
 788                 return -1;
 789         if (!script_name)
 790                 setup_pager();
 791
 792         session = perf_session__new(input_name, O_RDONLY, 0, false);
 793         if (session == NULL)
 794                 return -ENOMEM;
 795
 796         if (strcmp(input_name, "-") &&
 797             !perf_session__has_traces(session, "record -R"))
 798                 return -EINVAL;
 799
 800         if (generate_script_lang) {
 801                 struct stat perf_stat;
 802
 803                 int input = open(input_name, O_RDONLY);
 804                 if (input < 0) {
 805                         perror("failed to open file");
 806                         exit(-1);
 807                 }
 808
 809                 err = fstat(input, &perf_stat);
 810                 if (err < 0) {
 811                         perror("failed to stat file");
 812                         exit(-1);
 813                 }
 814
 815                 if (!perf_stat.st_size) {
 816                         fprintf(stderr, "zero-sized file, nothing to do!\n");
 817                         exit(0);
 818                 }
 819
 820                 scripting_ops = script_spec__lookup(generate_script_lang);
 821                 if (!scripting_ops) {
 822                         fprintf(stderr, "invalid language specifier");
 823                         return -1;
 824                 }
 825
 826                 err = scripting_ops->generate_script("perf-script");
 827                 goto out;
 828         }
 829
 830         if (script_name) {
 831                 err = scripting_ops->start_script(script_name, argc, argv);
 832                 if (err)
 833                         goto out;
 834                 pr_debug("perf script started with script %s\n\n", script_name);
 835         }
 836
 837         err = __cmd_script(session);
 838
 839         perf_session__delete(session);
 840         cleanup_scripting();
 841 out:
 842         return err;
 843 }