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/perf_regs.h"
  10 #include "util/session.h"
  11 #include "util/tool.h"
  12 #include "util/symbol.h"
  13 #include "util/thread.h"
  14 #include "util/trace-event.h"
  15 #include "util/util.h"
  16 #include "util/evlist.h"
  17 #include "util/evsel.h"
  18 #include "util/sort.h"
  19 #include "util/data.h"
  20 #include "util/auxtrace.h"
  21 #include <linux/bitmap.h>
  22
  23 static char const               *script_name;
  24 static char const               *generate_script_lang;
  25 static bool                     debug_mode;
  26 static u64                      last_timestamp;
  27 static u64                      nr_unordered;
  28 static bool                     no_callchain;
  29 static bool                     latency_format;
  30 static bool                     system_wide;
  31 static bool                     print_flags;
  32 static bool                     nanosecs;
  33 static const char               *cpu_list;
  34 static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
  35
  36 unsigned int scripting_max_stack = PERF_MAX_STACK_DEPTH;
  37
  38 enum perf_output_field {
  39         PERF_OUTPUT_COMM            = 1U << 0,
  40         PERF_OUTPUT_TID             = 1U << 1,
  41         PERF_OUTPUT_PID             = 1U << 2,
  42         PERF_OUTPUT_TIME            = 1U << 3,
  43         PERF_OUTPUT_CPU             = 1U << 4,
  44         PERF_OUTPUT_EVNAME          = 1U << 5,
  45         PERF_OUTPUT_TRACE           = 1U << 6,
  46         PERF_OUTPUT_IP              = 1U << 7,
  47         PERF_OUTPUT_SYM             = 1U << 8,
  48         PERF_OUTPUT_DSO             = 1U << 9,
  49         PERF_OUTPUT_ADDR            = 1U << 10,
  50         PERF_OUTPUT_SYMOFFSET       = 1U << 11,
  51         PERF_OUTPUT_SRCLINE         = 1U << 12,
  52         PERF_OUTPUT_PERIOD          = 1U << 13,
  53         PERF_OUTPUT_IREGS           = 1U << 14,
  54         PERF_OUTPUT_BRSTACK         = 1U << 15,
  55         PERF_OUTPUT_BRSTACKSYM      = 1U << 16,
  56 };
  57
  58 struct output_option {
  59         const char *str;
  60         enum perf_output_field field;
  61 } all_output_options[] = {
  62         {.str = "comm",  .field = PERF_OUTPUT_COMM},
  63         {.str = "tid",   .field = PERF_OUTPUT_TID},
  64         {.str = "pid",   .field = PERF_OUTPUT_PID},
  65         {.str = "time",  .field = PERF_OUTPUT_TIME},
  66         {.str = "cpu",   .field = PERF_OUTPUT_CPU},
  67         {.str = "event", .field = PERF_OUTPUT_EVNAME},
  68         {.str = "trace", .field = PERF_OUTPUT_TRACE},
  69         {.str = "ip",    .field = PERF_OUTPUT_IP},
  70         {.str = "sym",   .field = PERF_OUTPUT_SYM},
  71         {.str = "dso",   .field = PERF_OUTPUT_DSO},
  72         {.str = "addr",  .field = PERF_OUTPUT_ADDR},
  73         {.str = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
  74         {.str = "srcline", .field = PERF_OUTPUT_SRCLINE},
  75         {.str = "period", .field = PERF_OUTPUT_PERIOD},
  76         {.str = "iregs", .field = PERF_OUTPUT_IREGS},
  77         {.str = "brstack", .field = PERF_OUTPUT_BRSTACK},
  78         {.str = "brstacksym", .field = PERF_OUTPUT_BRSTACKSYM},
  79 };
  80
  81 /* default set to maintain compatibility with current format */
  82 static struct {
  83         bool user_set;
  84         bool wildcard_set;
  85         unsigned int print_ip_opts;
  86         u64 fields;
  87         u64 invalid_fields;
  88 } output[PERF_TYPE_MAX] = {
  89
  90         [PERF_TYPE_HARDWARE] = {
  91                 .user_set = false,
  92
  93                 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
  94                               PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
  95                               PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
  96                               PERF_OUTPUT_SYM | PERF_OUTPUT_DSO |
  97                               PERF_OUTPUT_PERIOD,
  98
  99                 .invalid_fields = PERF_OUTPUT_TRACE,
 100         },
 101
 102         [PERF_TYPE_SOFTWARE] = {
 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                               PERF_OUTPUT_PERIOD,
 110
 111                 .invalid_fields = PERF_OUTPUT_TRACE,
 112         },
 113
 114         [PERF_TYPE_TRACEPOINT] = {
 115                 .user_set = false,
 116
 117                 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
 118                                   PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
 119                                   PERF_OUTPUT_EVNAME | PERF_OUTPUT_TRACE,
 120         },
 121
 122         [PERF_TYPE_RAW] = {
 123                 .user_set = false,
 124
 125                 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
 126                               PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
 127                               PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
 128                               PERF_OUTPUT_SYM | PERF_OUTPUT_DSO |
 129                               PERF_OUTPUT_PERIOD,
 130
 131                 .invalid_fields = PERF_OUTPUT_TRACE,
 132         },
 133 };
 134
 135 static bool output_set_by_user(void)
 136 {
 137         int j;
 138         for (j = 0; j < PERF_TYPE_MAX; ++j) {
 139                 if (output[j].user_set)
 140                         return true;
 141         }
 142         return false;
 143 }
 144
 145 static const char *output_field2str(enum perf_output_field field)
 146 {
 147         int i, imax = ARRAY_SIZE(all_output_options);
 148         const char *str = "";
 149
 150         for (i = 0; i < imax; ++i) {
 151                 if (all_output_options[i].field == field) {
 152                         str = all_output_options[i].str;
 153                         break;
 154                 }
 155         }
 156         return str;
 157 }
 158
 159 #define PRINT_FIELD(x)  (output[attr->type].fields & PERF_OUTPUT_##x)
 160
 161 static int perf_evsel__do_check_stype(struct perf_evsel *evsel,
 162                                       u64 sample_type, const char *sample_msg,
 163                                       enum perf_output_field field,
 164                                       bool allow_user_set)
 165 {
 166         struct perf_event_attr *attr = &evsel->attr;
 167         int type = attr->type;
 168         const char *evname;
 169
 170         if (attr->sample_type & sample_type)
 171                 return 0;
 172
 173         if (output[type].user_set) {
 174                 if (allow_user_set)
 175                         return 0;
 176                 evname = perf_evsel__name(evsel);
 177                 pr_err("Samples for '%s' event do not have %s attribute set. "
 178                        "Cannot print '%s' field.\n",
 179                        evname, sample_msg, output_field2str(field));
 180                 return -1;
 181         }
 182
 183         /* user did not ask for it explicitly so remove from the default list */
 184         output[type].fields &= ~field;
 185         evname = perf_evsel__name(evsel);
 186         pr_debug("Samples for '%s' event do not have %s attribute set. "
 187                  "Skipping '%s' field.\n",
 188                  evname, sample_msg, output_field2str(field));
 189
 190         return 0;
 191 }
 192
 193 static int perf_evsel__check_stype(struct perf_evsel *evsel,
 194                                    u64 sample_type, const char *sample_msg,
 195                                    enum perf_output_field field)
 196 {
 197         return perf_evsel__do_check_stype(evsel, sample_type, sample_msg, field,
 198                                           false);
 199 }
 200
 201 static int perf_evsel__check_attr(struct perf_evsel *evsel,
 202                                   struct perf_session *session)
 203 {
 204         struct perf_event_attr *attr = &evsel->attr;
 205         bool allow_user_set;
 206
 207         allow_user_set = perf_header__has_feat(&session->header,
 208                                                HEADER_AUXTRACE);
 209
 210         if (PRINT_FIELD(TRACE) &&
 211                 !perf_session__has_traces(session, "record -R"))
 212                 return -EINVAL;
 213
 214         if (PRINT_FIELD(IP)) {
 215                 if (perf_evsel__check_stype(evsel, PERF_SAMPLE_IP, "IP",
 216                                             PERF_OUTPUT_IP))
 217                         return -EINVAL;
 218         }
 219
 220         if (PRINT_FIELD(ADDR) &&
 221                 perf_evsel__do_check_stype(evsel, PERF_SAMPLE_ADDR, "ADDR",
 222                                            PERF_OUTPUT_ADDR, allow_user_set))
 223                 return -EINVAL;
 224
 225         if (PRINT_FIELD(SYM) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
 226                 pr_err("Display of symbols requested but neither sample IP nor "
 227                            "sample address\nis selected. Hence, no addresses to convert "
 228                        "to symbols.\n");
 229                 return -EINVAL;
 230         }
 231         if (PRINT_FIELD(SYMOFFSET) && !PRINT_FIELD(SYM)) {
 232                 pr_err("Display of offsets requested but symbol is not"
 233                        "selected.\n");
 234                 return -EINVAL;
 235         }
 236         if (PRINT_FIELD(DSO) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
 237                 pr_err("Display of DSO requested but neither sample IP nor "
 238                            "sample address\nis selected. Hence, no addresses to convert "
 239                        "to DSO.\n");
 240                 return -EINVAL;
 241         }
 242         if (PRINT_FIELD(SRCLINE) && !PRINT_FIELD(IP)) {
 243                 pr_err("Display of source line number requested but sample IP is not\n"
 244                        "selected. Hence, no address to lookup the source line number.\n");
 245                 return -EINVAL;
 246         }
 247
 248         if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
 249                 perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID",
 250                                         PERF_OUTPUT_TID|PERF_OUTPUT_PID))
 251                 return -EINVAL;
 252
 253         if (PRINT_FIELD(TIME) &&
 254                 perf_evsel__check_stype(evsel, PERF_SAMPLE_TIME, "TIME",
 255                                         PERF_OUTPUT_TIME))
 256                 return -EINVAL;
 257
 258         if (PRINT_FIELD(CPU) &&
 259                 perf_evsel__do_check_stype(evsel, PERF_SAMPLE_CPU, "CPU",
 260                                            PERF_OUTPUT_CPU, allow_user_set))
 261                 return -EINVAL;
 262
 263         if (PRINT_FIELD(PERIOD) &&
 264                 perf_evsel__check_stype(evsel, PERF_SAMPLE_PERIOD, "PERIOD",
 265                                         PERF_OUTPUT_PERIOD))
 266                 return -EINVAL;
 267
 268         if (PRINT_FIELD(IREGS) &&
 269                 perf_evsel__check_stype(evsel, PERF_SAMPLE_REGS_INTR, "IREGS",
 270                                         PERF_OUTPUT_IREGS))
 271                 return -EINVAL;
 272
 273         return 0;
 274 }
 275
 276 static void set_print_ip_opts(struct perf_event_attr *attr)
 277 {
 278         unsigned int type = attr->type;
 279
 280         output[type].print_ip_opts = 0;
 281         if (PRINT_FIELD(IP))
 282                 output[type].print_ip_opts |= PRINT_IP_OPT_IP;
 283
 284         if (PRINT_FIELD(SYM))
 285                 output[type].print_ip_opts |= PRINT_IP_OPT_SYM;
 286
 287         if (PRINT_FIELD(DSO))
 288                 output[type].print_ip_opts |= PRINT_IP_OPT_DSO;
 289
 290         if (PRINT_FIELD(SYMOFFSET))
 291                 output[type].print_ip_opts |= PRINT_IP_OPT_SYMOFFSET;
 292
 293         if (PRINT_FIELD(SRCLINE))
 294                 output[type].print_ip_opts |= PRINT_IP_OPT_SRCLINE;
 295 }
 296
 297 /*
 298  * verify all user requested events exist and the samples
 299  * have the expected data
 300  */
 301 static int perf_session__check_output_opt(struct perf_session *session)
 302 {
 303         int j;
 304         struct perf_evsel *evsel;
 305
 306         for (j = 0; j < PERF_TYPE_MAX; ++j) {
 307                 evsel = perf_session__find_first_evtype(session, j);
 308
 309                 /*
 310                  * even if fields is set to 0 (ie., show nothing) event must
 311                  * exist if user explicitly includes it on the command line
 312                  */
 313                 if (!evsel && output[j].user_set && !output[j].wildcard_set) {
 314                         pr_err("%s events do not exist. "
 315                                "Remove corresponding -f option to proceed.\n",
 316                                event_type(j));
 317                         return -1;
 318                 }
 319
 320                 if (evsel && output[j].fields &&
 321                         perf_evsel__check_attr(evsel, session))
 322                         return -1;
 323
 324                 if (evsel == NULL)
 325                         continue;
 326
 327                 set_print_ip_opts(&evsel->attr);
 328         }
 329
 330         if (!no_callchain) {
 331                 bool use_callchain = false;
 332
 333                 evlist__for_each(session->evlist, evsel) {
 334                         if (evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN) {
 335                                 use_callchain = true;
 336                                 break;
 337                         }
 338                 }
 339                 if (!use_callchain)
 340                         symbol_conf.use_callchain = false;
 341         }
 342
 343         /*
 344          * set default for tracepoints to print symbols only
 345          * if callchains are present
 346          */
 347         if (symbol_conf.use_callchain &&
 348             !output[PERF_TYPE_TRACEPOINT].user_set) {
 349                 struct perf_event_attr *attr;
 350
 351                 j = PERF_TYPE_TRACEPOINT;
 352                 evsel = perf_session__find_first_evtype(session, j);
 353                 if (evsel == NULL)
 354                         goto out;
 355
 356                 attr = &evsel->attr;
 357
 358                 if (attr->sample_type & PERF_SAMPLE_CALLCHAIN) {
 359                         output[j].fields |= PERF_OUTPUT_IP;
 360                         output[j].fields |= PERF_OUTPUT_SYM;
 361                         output[j].fields |= PERF_OUTPUT_DSO;
 362                         set_print_ip_opts(attr);
 363                 }
 364         }
 365
 366 out:
 367         return 0;
 368 }
 369
 370 static void print_sample_iregs(union perf_event *event __maybe_unused,
 371                           struct perf_sample *sample,
 372                           struct thread *thread __maybe_unused,
 373                           struct perf_event_attr *attr)
 374 {
 375         struct regs_dump *regs = &sample->intr_regs;
 376         uint64_t mask = attr->sample_regs_intr;
 377         unsigned i = 0, r;
 378
 379         if (!regs)
 380                 return;
 381
 382         for_each_set_bit(r, (unsigned long *) &mask, sizeof(mask) * 8) {
 383                 u64 val = regs->regs[i++];
 384                 printf("%5s:0x%"PRIx64" ", perf_reg_name(r), val);
 385         }
 386 }
 387
 388 static void print_sample_start(struct perf_sample *sample,
 389                                struct thread *thread,
 390                                struct perf_evsel *evsel)
 391 {
 392         struct perf_event_attr *attr = &evsel->attr;
 393         unsigned long secs;
 394         unsigned long usecs;
 395         unsigned long long nsecs;
 396
 397         if (PRINT_FIELD(COMM)) {
 398                 if (latency_format)
 399                         printf("%8.8s ", thread__comm_str(thread));
 400                 else if (PRINT_FIELD(IP) && symbol_conf.use_callchain)
 401                         printf("%s ", thread__comm_str(thread));
 402                 else
 403                         printf("%16s ", thread__comm_str(thread));
 404         }
 405
 406         if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
 407                 printf("%5d/%-5d ", sample->pid, sample->tid);
 408         else if (PRINT_FIELD(PID))
 409                 printf("%5d ", sample->pid);
 410         else if (PRINT_FIELD(TID))
 411                 printf("%5d ", sample->tid);
 412
 413         if (PRINT_FIELD(CPU)) {
 414                 if (latency_format)
 415                         printf("%3d ", sample->cpu);
 416                 else
 417                         printf("[%03d] ", sample->cpu);
 418         }
 419
 420         if (PRINT_FIELD(TIME)) {
 421                 nsecs = sample->time;
 422                 secs = nsecs / NSECS_PER_SEC;
 423                 nsecs -= secs * NSECS_PER_SEC;
 424                 usecs = nsecs / NSECS_PER_USEC;
 425                 if (nanosecs)
 426                         printf("%5lu.%09llu: ", secs, nsecs);
 427                 else
 428                         printf("%5lu.%06lu: ", secs, usecs);
 429         }
 430 }
 431
 432 static inline char
 433 mispred_str(struct branch_entry *br)
 434 {
 435         if (!(br->flags.mispred  || br->flags.predicted))
 436                 return '-';
 437
 438         return br->flags.predicted ? 'P' : 'M';
 439 }
 440
 441 static void print_sample_brstack(union perf_event *event __maybe_unused,
 442                           struct perf_sample *sample,
 443                           struct thread *thread __maybe_unused,
 444                           struct perf_event_attr *attr __maybe_unused)
 445 {
 446         struct branch_stack *br = sample->branch_stack;
 447         u64 i;
 448
 449         if (!(br && br->nr))
 450                 return;
 451
 452         for (i = 0; i < br->nr; i++) {
 453                 printf(" 0x%"PRIx64"/0x%"PRIx64"/%c/%c/%c/%d ",
 454                         br->entries[i].from,
 455                         br->entries[i].to,
 456                         mispred_str( br->entries + i),
 457                         br->entries[i].flags.in_tx? 'X' : '-',
 458                         br->entries[i].flags.abort? 'A' : '-',
 459                         br->entries[i].flags.cycles);
 460         }
 461 }
 462
 463 static void print_sample_brstacksym(union perf_event *event __maybe_unused,
 464                           struct perf_sample *sample,
 465                           struct thread *thread __maybe_unused,
 466                           struct perf_event_attr *attr __maybe_unused)
 467 {
 468         struct branch_stack *br = sample->branch_stack;
 469         struct addr_location alf, alt;
 470         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 471         u64 i, from, to;
 472
 473         if (!(br && br->nr))
 474                 return;
 475
 476         for (i = 0; i < br->nr; i++) {
 477
 478                 memset(&alf, 0, sizeof(alf));
 479                 memset(&alt, 0, sizeof(alt));
 480                 from = br->entries[i].from;
 481                 to   = br->entries[i].to;
 482
 483                 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, from, &alf);
 484                 if (alf.map)
 485                         alf.sym = map__find_symbol(alf.map, alf.addr, NULL);
 486
 487                 thread__find_addr_map(thread, cpumode, MAP__FUNCTION, to, &alt);
 488                 if (alt.map)
 489                         alt.sym = map__find_symbol(alt.map, alt.addr, NULL);
 490
 491                 symbol__fprintf_symname_offs(alf.sym, &alf, stdout);
 492                 putchar('/');
 493                 symbol__fprintf_symname_offs(alt.sym, &alt, stdout);
 494                 printf("/%c/%c/%c/%d ",
 495                         mispred_str( br->entries + i),
 496                         br->entries[i].flags.in_tx? 'X' : '-',
 497                         br->entries[i].flags.abort? 'A' : '-',
 498                         br->entries[i].flags.cycles);
 499         }
 500 }
 501
 502
 503 static void print_sample_addr(union perf_event *event,
 504                           struct perf_sample *sample,
 505                           struct thread *thread,
 506                           struct perf_event_attr *attr)
 507 {
 508         struct addr_location al;
 509
 510         printf("%16" PRIx64, sample->addr);
 511
 512         if (!sample_addr_correlates_sym(attr))
 513                 return;
 514
 515         perf_event__preprocess_sample_addr(event, sample, thread, &al);
 516
 517         if (PRINT_FIELD(SYM)) {
 518                 printf(" ");
 519                 if (PRINT_FIELD(SYMOFFSET))
 520                         symbol__fprintf_symname_offs(al.sym, &al, stdout);
 521                 else
 522                         symbol__fprintf_symname(al.sym, stdout);
 523         }
 524
 525         if (PRINT_FIELD(DSO)) {
 526                 printf(" (");
 527                 map__fprintf_dsoname(al.map, stdout);
 528                 printf(")");
 529         }
 530 }
 531
 532 static void print_sample_bts(union perf_event *event,
 533                              struct perf_sample *sample,
 534                              struct perf_evsel *evsel,
 535                              struct thread *thread,
 536                              struct addr_location *al)
 537 {
 538         struct perf_event_attr *attr = &evsel->attr;
 539         bool print_srcline_last = false;
 540
 541         /* print branch_from information */
 542         if (PRINT_FIELD(IP)) {
 543                 unsigned int print_opts = output[attr->type].print_ip_opts;
 544
 545                 if (symbol_conf.use_callchain && sample->callchain) {
 546                         printf("\n");
 547                 } else {
 548                         printf(" ");
 549                         if (print_opts & PRINT_IP_OPT_SRCLINE) {
 550                                 print_srcline_last = true;
 551                                 print_opts &= ~PRINT_IP_OPT_SRCLINE;
 552                         }
 553                 }
 554                 perf_evsel__print_ip(evsel, sample, al, print_opts,
 555                                      scripting_max_stack);
 556         }
 557
 558         /* print branch_to information */
 559         if (PRINT_FIELD(ADDR) ||
 560             ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
 561              !output[attr->type].user_set)) {
 562                 printf(" => ");
 563                 print_sample_addr(event, sample, thread, attr);
 564         }
 565
 566         if (print_srcline_last)
 567                 map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
 568
 569         printf("\n");
 570 }
 571
 572 static void print_sample_flags(u32 flags)
 573 {
 574         const char *chars = PERF_IP_FLAG_CHARS;
 575         const int n = strlen(PERF_IP_FLAG_CHARS);
 576         char str[33];
 577         int i, pos = 0;
 578
 579         for (i = 0; i < n; i++, flags >>= 1) {
 580                 if (flags & 1)
 581                         str[pos++] = chars[i];
 582         }
 583         for (; i < 32; i++, flags >>= 1) {
 584                 if (flags & 1)
 585                         str[pos++] = '?';
 586         }
 587         str[pos] = 0;
 588         printf("  %-4s ", str);
 589 }
 590
 591 static void process_event(union perf_event *event, struct perf_sample *sample,
 592                           struct perf_evsel *evsel, struct addr_location *al)
 593 {
 594         struct thread *thread = al->thread;
 595         struct perf_event_attr *attr = &evsel->attr;
 596
 597         if (output[attr->type].fields == 0)
 598                 return;
 599
 600         print_sample_start(sample, thread, evsel);
 601
 602         if (PRINT_FIELD(PERIOD))
 603                 printf("%10" PRIu64 " ", sample->period);
 604
 605         if (PRINT_FIELD(EVNAME)) {
 606                 const char *evname = perf_evsel__name(evsel);
 607                 printf("%s: ", evname ? evname : "[unknown]");
 608         }
 609
 610         if (print_flags)
 611                 print_sample_flags(sample->flags);
 612
 613         if (is_bts_event(attr)) {
 614                 print_sample_bts(event, sample, evsel, thread, al);
 615                 return;
 616         }
 617
 618         if (PRINT_FIELD(TRACE))
 619                 event_format__print(evsel->tp_format, sample->cpu,
 620                                     sample->raw_data, sample->raw_size);
 621         if (PRINT_FIELD(ADDR))
 622                 print_sample_addr(event, sample, thread, attr);
 623
 624         if (PRINT_FIELD(IP)) {
 625                 if (!symbol_conf.use_callchain)
 626                         printf(" ");
 627                 else
 628                         printf("\n");
 629
 630                 perf_evsel__print_ip(evsel, sample, al,
 631                                      output[attr->type].print_ip_opts,
 632                                      scripting_max_stack);
 633         }
 634
 635         if (PRINT_FIELD(IREGS))
 636                 print_sample_iregs(event, sample, thread, attr);
 637
 638         if (PRINT_FIELD(BRSTACK))
 639                 print_sample_brstack(event, sample, thread, attr);
 640         else if (PRINT_FIELD(BRSTACKSYM))
 641                 print_sample_brstacksym(event, sample, thread, attr);
 642
 643         printf("\n");
 644 }
 645
 646 static int default_start_script(const char *script __maybe_unused,
 647                                 int argc __maybe_unused,
 648                                 const char **argv __maybe_unused)
 649 {
 650         return 0;
 651 }
 652
 653 static int default_flush_script(void)
 654 {
 655         return 0;
 656 }
 657
 658 static int default_stop_script(void)
 659 {
 660         return 0;
 661 }
 662
 663 static int default_generate_script(struct pevent *pevent __maybe_unused,
 664                                    const char *outfile __maybe_unused)
 665 {
 666         return 0;
 667 }
 668
 669 static struct scripting_ops default_scripting_ops = {
 670         .start_script           = default_start_script,
 671         .flush_script           = default_flush_script,
 672         .stop_script            = default_stop_script,
 673         .process_event          = process_event,
 674         .generate_script        = default_generate_script,
 675 };
 676
 677 static struct scripting_ops     *scripting_ops;
 678
 679 static void setup_scripting(void)
 680 {
 681         setup_perl_scripting();
 682         setup_python_scripting();
 683
 684         scripting_ops = &default_scripting_ops;
 685 }
 686
 687 static int flush_scripting(void)
 688 {
 689         return scripting_ops->flush_script();
 690 }
 691
 692 static int cleanup_scripting(void)
 693 {
 694         pr_debug("\nperf script stopped\n");
 695
 696         return scripting_ops->stop_script();
 697 }
 698
 699 static int process_sample_event(struct perf_tool *tool __maybe_unused,
 700                                 union perf_event *event,
 701                                 struct perf_sample *sample,
 702                                 struct perf_evsel *evsel,
 703                                 struct machine *machine)
 704 {
 705         struct addr_location al;
 706
 707         if (debug_mode) {
 708                 if (sample->time < last_timestamp) {
 709                         pr_err("Samples misordered, previous: %" PRIu64
 710                                 " this: %" PRIu64 "\n", last_timestamp,
 711                                 sample->time);
 712                         nr_unordered++;
 713                 }
 714                 last_timestamp = sample->time;
 715                 return 0;
 716         }
 717
 718         if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
 719                 pr_err("problem processing %d event, skipping it.\n",
 720                        event->header.type);
 721                 return -1;
 722         }
 723
 724         if (al.filtered)
 725                 goto out_put;
 726
 727         if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
 728                 goto out_put;
 729
 730         scripting_ops->process_event(event, sample, evsel, &al);
 731 out_put:
 732         addr_location__put(&al);
 733         return 0;
 734 }
 735
 736 struct perf_script {
 737         struct perf_tool        tool;
 738         struct perf_session     *session;
 739         bool                    show_task_events;
 740         bool                    show_mmap_events;
 741         bool                    show_switch_events;
 742 };
 743
 744 static int process_attr(struct perf_tool *tool, union perf_event *event,
 745                         struct perf_evlist **pevlist)
 746 {
 747         struct perf_script *scr = container_of(tool, struct perf_script, tool);
 748         struct perf_evlist *evlist;
 749         struct perf_evsel *evsel, *pos;
 750         int err;
 751
 752         err = perf_event__process_attr(tool, event, pevlist);
 753         if (err)
 754                 return err;
 755
 756         evlist = *pevlist;
 757         evsel = perf_evlist__last(*pevlist);
 758
 759         if (evsel->attr.type >= PERF_TYPE_MAX)
 760                 return 0;
 761
 762         evlist__for_each(evlist, pos) {
 763                 if (pos->attr.type == evsel->attr.type && pos != evsel)
 764                         return 0;
 765         }
 766
 767         set_print_ip_opts(&evsel->attr);
 768
 769         if (evsel->attr.sample_type)
 770                 err = perf_evsel__check_attr(evsel, scr->session);
 771
 772         return err;
 773 }
 774
 775 static int process_comm_event(struct perf_tool *tool,
 776                               union perf_event *event,
 777                               struct perf_sample *sample,
 778                               struct machine *machine)
 779 {
 780         struct thread *thread;
 781         struct perf_script *script = container_of(tool, struct perf_script, tool);
 782         struct perf_session *session = script->session;
 783         struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 784         int ret = -1;
 785
 786         thread = machine__findnew_thread(machine, event->comm.pid, event->comm.tid);
 787         if (thread == NULL) {
 788                 pr_debug("problem processing COMM event, skipping it.\n");
 789                 return -1;
 790         }
 791
 792         if (perf_event__process_comm(tool, event, sample, machine) < 0)
 793                 goto out;
 794
 795         if (!evsel->attr.sample_id_all) {
 796                 sample->cpu = 0;
 797                 sample->time = 0;
 798                 sample->tid = event->comm.tid;
 799                 sample->pid = event->comm.pid;
 800         }
 801         print_sample_start(sample, thread, evsel);
 802         perf_event__fprintf(event, stdout);
 803         ret = 0;
 804 out:
 805         thread__put(thread);
 806         return ret;
 807 }
 808
 809 static int process_fork_event(struct perf_tool *tool,
 810                               union perf_event *event,
 811                               struct perf_sample *sample,
 812                               struct machine *machine)
 813 {
 814         struct thread *thread;
 815         struct perf_script *script = container_of(tool, struct perf_script, tool);
 816         struct perf_session *session = script->session;
 817         struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 818
 819         if (perf_event__process_fork(tool, event, sample, machine) < 0)
 820                 return -1;
 821
 822         thread = machine__findnew_thread(machine, event->fork.pid, event->fork.tid);
 823         if (thread == NULL) {
 824                 pr_debug("problem processing FORK event, skipping it.\n");
 825                 return -1;
 826         }
 827
 828         if (!evsel->attr.sample_id_all) {
 829                 sample->cpu = 0;
 830                 sample->time = event->fork.time;
 831                 sample->tid = event->fork.tid;
 832                 sample->pid = event->fork.pid;
 833         }
 834         print_sample_start(sample, thread, evsel);
 835         perf_event__fprintf(event, stdout);
 836         thread__put(thread);
 837
 838         return 0;
 839 }
 840 static int process_exit_event(struct perf_tool *tool,
 841                               union perf_event *event,
 842                               struct perf_sample *sample,
 843                               struct machine *machine)
 844 {
 845         int err = 0;
 846         struct thread *thread;
 847         struct perf_script *script = container_of(tool, struct perf_script, tool);
 848         struct perf_session *session = script->session;
 849         struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 850
 851         thread = machine__findnew_thread(machine, event->fork.pid, event->fork.tid);
 852         if (thread == NULL) {
 853                 pr_debug("problem processing EXIT event, skipping it.\n");
 854                 return -1;
 855         }
 856
 857         if (!evsel->attr.sample_id_all) {
 858                 sample->cpu = 0;
 859                 sample->time = 0;
 860                 sample->tid = event->fork.tid;
 861                 sample->pid = event->fork.pid;
 862         }
 863         print_sample_start(sample, thread, evsel);
 864         perf_event__fprintf(event, stdout);
 865
 866         if (perf_event__process_exit(tool, event, sample, machine) < 0)
 867                 err = -1;
 868
 869         thread__put(thread);
 870         return err;
 871 }
 872
 873 static int process_mmap_event(struct perf_tool *tool,
 874                               union perf_event *event,
 875                               struct perf_sample *sample,
 876                               struct machine *machine)
 877 {
 878         struct thread *thread;
 879         struct perf_script *script = container_of(tool, struct perf_script, tool);
 880         struct perf_session *session = script->session;
 881         struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 882
 883         if (perf_event__process_mmap(tool, event, sample, machine) < 0)
 884                 return -1;
 885
 886         thread = machine__findnew_thread(machine, event->mmap.pid, event->mmap.tid);
 887         if (thread == NULL) {
 888                 pr_debug("problem processing MMAP event, skipping it.\n");
 889                 return -1;
 890         }
 891
 892         if (!evsel->attr.sample_id_all) {
 893                 sample->cpu = 0;
 894                 sample->time = 0;
 895                 sample->tid = event->mmap.tid;
 896                 sample->pid = event->mmap.pid;
 897         }
 898         print_sample_start(sample, thread, evsel);
 899         perf_event__fprintf(event, stdout);
 900         thread__put(thread);
 901         return 0;
 902 }
 903
 904 static int process_mmap2_event(struct perf_tool *tool,
 905                               union perf_event *event,
 906                               struct perf_sample *sample,
 907                               struct machine *machine)
 908 {
 909         struct thread *thread;
 910         struct perf_script *script = container_of(tool, struct perf_script, tool);
 911         struct perf_session *session = script->session;
 912         struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 913
 914         if (perf_event__process_mmap2(tool, event, sample, machine) < 0)
 915                 return -1;
 916
 917         thread = machine__findnew_thread(machine, event->mmap2.pid, event->mmap2.tid);
 918         if (thread == NULL) {
 919                 pr_debug("problem processing MMAP2 event, skipping it.\n");
 920                 return -1;
 921         }
 922
 923         if (!evsel->attr.sample_id_all) {
 924                 sample->cpu = 0;
 925                 sample->time = 0;
 926                 sample->tid = event->mmap2.tid;
 927                 sample->pid = event->mmap2.pid;
 928         }
 929         print_sample_start(sample, thread, evsel);
 930         perf_event__fprintf(event, stdout);
 931         thread__put(thread);
 932         return 0;
 933 }
 934
 935 static int process_switch_event(struct perf_tool *tool,
 936                                 union perf_event *event,
 937                                 struct perf_sample *sample,
 938                                 struct machine *machine)
 939 {
 940         struct thread *thread;
 941         struct perf_script *script = container_of(tool, struct perf_script, tool);
 942         struct perf_session *session = script->session;
 943         struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 944
 945         if (perf_event__process_switch(tool, event, sample, machine) < 0)
 946                 return -1;
 947
 948         thread = machine__findnew_thread(machine, sample->pid,
 949                                          sample->tid);
 950         if (thread == NULL) {
 951                 pr_debug("problem processing SWITCH event, skipping it.\n");
 952                 return -1;
 953         }
 954
 955         print_sample_start(sample, thread, evsel);
 956         perf_event__fprintf(event, stdout);
 957         thread__put(thread);
 958         return 0;
 959 }
 960
 961 static void sig_handler(int sig __maybe_unused)
 962 {
 963         session_done = 1;
 964 }
 965
 966 static int __cmd_script(struct perf_script *script)
 967 {
 968         int ret;
 969
 970         signal(SIGINT, sig_handler);
 971
 972         /* override event processing functions */
 973         if (script->show_task_events) {
 974                 script->tool.comm = process_comm_event;
 975                 script->tool.fork = process_fork_event;
 976                 script->tool.exit = process_exit_event;
 977         }
 978         if (script->show_mmap_events) {
 979                 script->tool.mmap = process_mmap_event;
 980                 script->tool.mmap2 = process_mmap2_event;
 981         }
 982         if (script->show_switch_events)
 983                 script->tool.context_switch = process_switch_event;
 984
 985         ret = perf_session__process_events(script->session);
 986
 987         if (debug_mode)
 988                 pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
 989
 990         return ret;
 991 }
 992
 993 struct script_spec {
 994         struct list_head        node;
 995         struct scripting_ops    *ops;
 996         char                    spec[0];
 997 };
 998
 999 static LIST_HEAD(script_specs);
1000
1001 static struct script_spec *script_spec__new(const char *spec,
1002                                             struct scripting_ops *ops)
1003 {
1004         struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
1005
1006         if (s != NULL) {
1007                 strcpy(s->spec, spec);
1008                 s->ops = ops;
1009         }
1010
1011         return s;
1012 }
1013
1014 static void script_spec__add(struct script_spec *s)
1015 {
1016         list_add_tail(&s->node, &script_specs);
1017 }
1018
1019 static struct script_spec *script_spec__find(const char *spec)
1020 {
1021         struct script_spec *s;
1022
1023         list_for_each_entry(s, &script_specs, node)
1024                 if (strcasecmp(s->spec, spec) == 0)
1025                         return s;
1026         return NULL;
1027 }
1028
1029 static struct script_spec *script_spec__findnew(const char *spec,
1030                                                 struct scripting_ops *ops)
1031 {
1032         struct script_spec *s = script_spec__find(spec);
1033
1034         if (s)
1035                 return s;
1036
1037         s = script_spec__new(spec, ops);
1038         if (!s)
1039                 return NULL;
1040
1041         script_spec__add(s);
1042
1043         return s;
1044 }
1045
1046 int script_spec_register(const char *spec, struct scripting_ops *ops)
1047 {
1048         struct script_spec *s;
1049
1050         s = script_spec__find(spec);
1051         if (s)
1052                 return -1;
1053
1054         s = script_spec__findnew(spec, ops);
1055         if (!s)
1056                 return -1;
1057
1058         return 0;
1059 }
1060
1061 static struct scripting_ops *script_spec__lookup(const char *spec)
1062 {
1063         struct script_spec *s = script_spec__find(spec);
1064         if (!s)
1065                 return NULL;
1066
1067         return s->ops;
1068 }
1069
1070 static void list_available_languages(void)
1071 {
1072         struct script_spec *s;
1073
1074         fprintf(stderr, "\n");
1075         fprintf(stderr, "Scripting language extensions (used in "
1076                 "perf script -s [spec:]script.[spec]):\n\n");
1077
1078         list_for_each_entry(s, &script_specs, node)
1079                 fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
1080
1081         fprintf(stderr, "\n");
1082 }
1083
1084 static int parse_scriptname(const struct option *opt __maybe_unused,
1085                             const char *str, int unset __maybe_unused)
1086 {
1087         char spec[PATH_MAX];
1088         const char *script, *ext;
1089         int len;
1090
1091         if (strcmp(str, "lang") == 0) {
1092                 list_available_languages();
1093                 exit(0);
1094         }
1095
1096         script = strchr(str, ':');
1097         if (script) {
1098                 len = script - str;
1099                 if (len >= PATH_MAX) {
1100                         fprintf(stderr, "invalid language specifier");
1101                         return -1;
1102                 }
1103                 strncpy(spec, str, len);
1104                 spec[len] = '\0';
1105                 scripting_ops = script_spec__lookup(spec);
1106                 if (!scripting_ops) {
1107                         fprintf(stderr, "invalid language specifier");
1108                         return -1;
1109                 }
1110                 script++;
1111         } else {
1112                 script = str;
1113                 ext = strrchr(script, '.');
1114                 if (!ext) {
1115                         fprintf(stderr, "invalid script extension");
1116                         return -1;
1117                 }
1118                 scripting_ops = script_spec__lookup(++ext);
1119                 if (!scripting_ops) {
1120                         fprintf(stderr, "invalid script extension");
1121                         return -1;
1122                 }
1123         }
1124
1125         script_name = strdup(script);
1126
1127         return 0;
1128 }
1129
1130 static int parse_output_fields(const struct option *opt __maybe_unused,
1131                             const char *arg, int unset __maybe_unused)
1132 {
1133         char *tok;
1134         int i, imax = ARRAY_SIZE(all_output_options);
1135         int j;
1136         int rc = 0;
1137         char *str = strdup(arg);
1138         int type = -1;
1139
1140         if (!str)
1141                 return -ENOMEM;
1142
1143         /* first word can state for which event type the user is specifying
1144          * the fields. If no type exists, the specified fields apply to all
1145          * event types found in the file minus the invalid fields for a type.
1146          */
1147         tok = strchr(str, ':');
1148         if (tok) {
1149                 *tok = '\0';
1150                 tok++;
1151                 if (!strcmp(str, "hw"))
1152                         type = PERF_TYPE_HARDWARE;
1153                 else if (!strcmp(str, "sw"))
1154                         type = PERF_TYPE_SOFTWARE;
1155                 else if (!strcmp(str, "trace"))
1156                         type = PERF_TYPE_TRACEPOINT;
1157                 else if (!strcmp(str, "raw"))
1158                         type = PERF_TYPE_RAW;
1159                 else {
1160                         fprintf(stderr, "Invalid event type in field string.\n");
1161                         rc = -EINVAL;
1162                         goto out;
1163                 }
1164
1165                 if (output[type].user_set)
1166                         pr_warning("Overriding previous field request for %s events.\n",
1167                                    event_type(type));
1168
1169                 output[type].fields = 0;
1170                 output[type].user_set = true;
1171                 output[type].wildcard_set = false;
1172
1173         } else {
1174                 tok = str;
1175                 if (strlen(str) == 0) {
1176                         fprintf(stderr,
1177                                 "Cannot set fields to 'none' for all event types.\n");
1178                         rc = -EINVAL;
1179                         goto out;
1180                 }
1181
1182                 if (output_set_by_user())
1183                         pr_warning("Overriding previous field request for all events.\n");
1184
1185                 for (j = 0; j < PERF_TYPE_MAX; ++j) {
1186                         output[j].fields = 0;
1187                         output[j].user_set = true;
1188                         output[j].wildcard_set = true;
1189                 }
1190         }
1191
1192         for (tok = strtok(tok, ","); tok; tok = strtok(NULL, ",")) {
1193                 for (i = 0; i < imax; ++i) {
1194                         if (strcmp(tok, all_output_options[i].str) == 0)
1195                                 break;
1196                 }
1197                 if (i == imax && strcmp(tok, "flags") == 0) {
1198                         print_flags = true;
1199                         continue;
1200                 }
1201                 if (i == imax) {
1202                         fprintf(stderr, "Invalid field requested.\n");
1203                         rc = -EINVAL;
1204                         goto out;
1205                 }
1206
1207                 if (type == -1) {
1208                         /* add user option to all events types for
1209                          * which it is valid
1210                          */
1211                         for (j = 0; j < PERF_TYPE_MAX; ++j) {
1212                                 if (output[j].invalid_fields & all_output_options[i].field) {
1213                                         pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
1214                                                    all_output_options[i].str, event_type(j));
1215                                 } else
1216                                         output[j].fields |= all_output_options[i].field;
1217                         }
1218                 } else {
1219                         if (output[type].invalid_fields & all_output_options[i].field) {
1220                                 fprintf(stderr, "\'%s\' not valid for %s events.\n",
1221                                          all_output_options[i].str, event_type(type));
1222
1223                                 rc = -EINVAL;
1224                                 goto out;
1225                         }
1226                         output[type].fields |= all_output_options[i].field;
1227                 }
1228         }
1229
1230         if (type >= 0) {
1231                 if (output[type].fields == 0) {
1232                         pr_debug("No fields requested for %s type. "
1233                                  "Events will not be displayed.\n", event_type(type));
1234                 }
1235         }
1236
1237 out:
1238         free(str);
1239         return rc;
1240 }
1241
1242 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
1243 static int is_directory(const char *base_path, const struct dirent *dent)
1244 {
1245         char path[PATH_MAX];
1246         struct stat st;
1247
1248         scnprintf(path, PATH_MAX, "%s/%s", base_path, dent->d_name);
1249         if (stat(path, &st))
1250                 return 0;
1251
1252         return S_ISDIR(st.st_mode);
1253 }
1254
1255 #define for_each_lang(scripts_path, scripts_dir, lang_dirent)           \
1256         while ((lang_dirent = readdir(scripts_dir)) != NULL)            \
1257                 if ((lang_dirent->d_type == DT_DIR ||                   \
1258                      (lang_dirent->d_type == DT_UNKNOWN &&              \
1259                       is_directory(scripts_path, lang_dirent))) &&      \
1260                     (strcmp(lang_dirent->d_name, ".")) &&               \
1261                     (strcmp(lang_dirent->d_name, "..")))
1262
1263 #define for_each_script(lang_path, lang_dir, script_dirent)             \
1264         while ((script_dirent = readdir(lang_dir)) != NULL)             \
1265                 if (script_dirent->d_type != DT_DIR &&                  \
1266                     (script_dirent->d_type != DT_UNKNOWN ||             \
1267                      !is_directory(lang_path, script_dirent)))
1268
1269
1270 #define RECORD_SUFFIX                   "-record"
1271 #define REPORT_SUFFIX                   "-report"
1272
1273 struct script_desc {
1274         struct list_head        node;
1275         char                    *name;
1276         char                    *half_liner;
1277         char                    *args;
1278 };
1279
1280 static LIST_HEAD(script_descs);
1281
1282 static struct script_desc *script_desc__new(const char *name)
1283 {
1284         struct script_desc *s = zalloc(sizeof(*s));
1285
1286         if (s != NULL && name)
1287                 s->name = strdup(name);
1288
1289         return s;
1290 }
1291
1292 static void script_desc__delete(struct script_desc *s)
1293 {
1294         zfree(&s->name);
1295         zfree(&s->half_liner);
1296         zfree(&s->args);
1297         free(s);
1298 }
1299
1300 static void script_desc__add(struct script_desc *s)
1301 {
1302         list_add_tail(&s->node, &script_descs);
1303 }
1304
1305 static struct script_desc *script_desc__find(const char *name)
1306 {
1307         struct script_desc *s;
1308
1309         list_for_each_entry(s, &script_descs, node)
1310                 if (strcasecmp(s->name, name) == 0)
1311                         return s;
1312         return NULL;
1313 }
1314
1315 static struct script_desc *script_desc__findnew(const char *name)
1316 {
1317         struct script_desc *s = script_desc__find(name);
1318
1319         if (s)
1320                 return s;
1321
1322         s = script_desc__new(name);
1323         if (!s)
1324                 goto out_delete_desc;
1325
1326         script_desc__add(s);
1327
1328         return s;
1329
1330 out_delete_desc:
1331         script_desc__delete(s);
1332
1333         return NULL;
1334 }
1335
1336 static const char *ends_with(const char *str, const char *suffix)
1337 {
1338         size_t suffix_len = strlen(suffix);
1339         const char *p = str;
1340
1341         if (strlen(str) > suffix_len) {
1342                 p = str + strlen(str) - suffix_len;
1343                 if (!strncmp(p, suffix, suffix_len))
1344                         return p;
1345         }
1346
1347         return NULL;
1348 }
1349
1350 static int read_script_info(struct script_desc *desc, const char *filename)
1351 {
1352         char line[BUFSIZ], *p;
1353         FILE *fp;
1354
1355         fp = fopen(filename, "r");
1356         if (!fp)
1357                 return -1;
1358
1359         while (fgets(line, sizeof(line), fp)) {
1360                 p = ltrim(line);
1361                 if (strlen(p) == 0)
1362                         continue;
1363                 if (*p != '#')
1364                         continue;
1365                 p++;
1366                 if (strlen(p) && *p == '!')
1367                         continue;
1368
1369                 p = ltrim(p);
1370                 if (strlen(p) && p[strlen(p) - 1] == '\n')
1371                         p[strlen(p) - 1] = '\0';
1372
1373                 if (!strncmp(p, "description:", strlen("description:"))) {
1374                         p += strlen("description:");
1375                         desc->half_liner = strdup(ltrim(p));
1376                         continue;
1377                 }
1378
1379                 if (!strncmp(p, "args:", strlen("args:"))) {
1380                         p += strlen("args:");
1381                         desc->args = strdup(ltrim(p));
1382                         continue;
1383                 }
1384         }
1385
1386         fclose(fp);
1387
1388         return 0;
1389 }
1390
1391 static char *get_script_root(struct dirent *script_dirent, const char *suffix)
1392 {
1393         char *script_root, *str;
1394
1395         script_root = strdup(script_dirent->d_name);
1396         if (!script_root)
1397                 return NULL;
1398
1399         str = (char *)ends_with(script_root, suffix);
1400         if (!str) {
1401                 free(script_root);
1402                 return NULL;
1403         }
1404
1405         *str = '\0';
1406         return script_root;
1407 }
1408
1409 static int list_available_scripts(const struct option *opt __maybe_unused,
1410                                   const char *s __maybe_unused,
1411                                   int unset __maybe_unused)
1412 {
1413         struct dirent *script_dirent, *lang_dirent;
1414         char scripts_path[MAXPATHLEN];
1415         DIR *scripts_dir, *lang_dir;
1416         char script_path[MAXPATHLEN];
1417         char lang_path[MAXPATHLEN];
1418         struct script_desc *desc;
1419         char first_half[BUFSIZ];
1420         char *script_root;
1421
1422         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1423
1424         scripts_dir = opendir(scripts_path);
1425         if (!scripts_dir)
1426                 return -1;
1427
1428         for_each_lang(scripts_path, scripts_dir, lang_dirent) {
1429                 scnprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1430                           lang_dirent->d_name);
1431                 lang_dir = opendir(lang_path);
1432                 if (!lang_dir)
1433                         continue;
1434
1435                 for_each_script(lang_path, lang_dir, script_dirent) {
1436                         script_root = get_script_root(script_dirent, REPORT_SUFFIX);
1437                         if (script_root) {
1438                                 desc = script_desc__findnew(script_root);
1439                                 scnprintf(script_path, MAXPATHLEN, "%s/%s",
1440                                           lang_path, script_dirent->d_name);
1441                                 read_script_info(desc, script_path);
1442                                 free(script_root);
1443                         }
1444                 }
1445         }
1446
1447         fprintf(stdout, "List of available trace scripts:\n");
1448         list_for_each_entry(desc, &script_descs, node) {
1449                 sprintf(first_half, "%s %s", desc->name,
1450                         desc->args ? desc->args : "");
1451                 fprintf(stdout, "  %-36s %s\n", first_half,
1452                         desc->half_liner ? desc->half_liner : "");
1453         }
1454
1455         exit(0);
1456 }
1457
1458 /*
1459  * Some scripts specify the required events in their "xxx-record" file,
1460  * this function will check if the events in perf.data match those
1461  * mentioned in the "xxx-record".
1462  *
1463  * Fixme: All existing "xxx-record" are all in good formats "-e event ",
1464  * which is covered well now. And new parsing code should be added to
1465  * cover the future complexing formats like event groups etc.
1466  */
1467 static int check_ev_match(char *dir_name, char *scriptname,
1468                         struct perf_session *session)
1469 {
1470         char filename[MAXPATHLEN], evname[128];
1471         char line[BUFSIZ], *p;
1472         struct perf_evsel *pos;
1473         int match, len;
1474         FILE *fp;
1475
1476         scnprintf(filename, MAXPATHLEN, "%s/bin/%s-record", dir_name, scriptname);
1477
1478         fp = fopen(filename, "r");
1479         if (!fp)
1480                 return -1;
1481
1482         while (fgets(line, sizeof(line), fp)) {
1483                 p = ltrim(line);
1484                 if (*p == '#')
1485                         continue;
1486
1487                 while (strlen(p)) {
1488                         p = strstr(p, "-e");
1489                         if (!p)
1490                                 break;
1491
1492                         p += 2;
1493                         p = ltrim(p);
1494                         len = strcspn(p, " \t");
1495                         if (!len)
1496                                 break;
1497
1498                         snprintf(evname, len + 1, "%s", p);
1499
1500                         match = 0;
1501                         evlist__for_each(session->evlist, pos) {
1502                                 if (!strcmp(perf_evsel__name(pos), evname)) {
1503                                         match = 1;
1504                                         break;
1505                                 }
1506                         }
1507
1508                         if (!match) {
1509                                 fclose(fp);
1510                                 return -1;
1511                         }
1512                 }
1513         }
1514
1515         fclose(fp);
1516         return 0;
1517 }
1518
1519 /*
1520  * Return -1 if none is found, otherwise the actual scripts number.
1521  *
1522  * Currently the only user of this function is the script browser, which
1523  * will list all statically runnable scripts, select one, execute it and
1524  * show the output in a perf browser.
1525  */
1526 int find_scripts(char **scripts_array, char **scripts_path_array)
1527 {
1528         struct dirent *script_dirent, *lang_dirent;
1529         char scripts_path[MAXPATHLEN], lang_path[MAXPATHLEN];
1530         DIR *scripts_dir, *lang_dir;
1531         struct perf_session *session;
1532         struct perf_data_file file = {
1533                 .path = input_name,
1534                 .mode = PERF_DATA_MODE_READ,
1535         };
1536         char *temp;
1537         int i = 0;
1538
1539         session = perf_session__new(&file, false, NULL);
1540         if (!session)
1541                 return -1;
1542
1543         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1544
1545         scripts_dir = opendir(scripts_path);
1546         if (!scripts_dir) {
1547                 perf_session__delete(session);
1548                 return -1;
1549         }
1550
1551         for_each_lang(scripts_path, scripts_dir, lang_dirent) {
1552                 scnprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
1553                           lang_dirent->d_name);
1554 #ifdef NO_LIBPERL
1555                 if (strstr(lang_path, "perl"))
1556                         continue;
1557 #endif
1558 #ifdef NO_LIBPYTHON
1559                 if (strstr(lang_path, "python"))
1560                         continue;
1561 #endif
1562
1563                 lang_dir = opendir(lang_path);
1564                 if (!lang_dir)
1565                         continue;
1566
1567                 for_each_script(lang_path, lang_dir, script_dirent) {
1568                         /* Skip those real time scripts: xxxtop.p[yl] */
1569                         if (strstr(script_dirent->d_name, "top."))
1570                                 continue;
1571                         sprintf(scripts_path_array[i], "%s/%s", lang_path,
1572                                 script_dirent->d_name);
1573                         temp = strchr(script_dirent->d_name, '.');
1574                         snprintf(scripts_array[i],
1575                                 (temp - script_dirent->d_name) + 1,
1576                                 "%s", script_dirent->d_name);
1577
1578                         if (check_ev_match(lang_path,
1579                                         scripts_array[i], session))
1580                                 continue;
1581
1582                         i++;
1583                 }
1584                 closedir(lang_dir);
1585         }
1586
1587         closedir(scripts_dir);
1588         perf_session__delete(session);
1589         return i;
1590 }
1591
1592 static char *get_script_path(const char *script_root, const char *suffix)
1593 {
1594         struct dirent *script_dirent, *lang_dirent;
1595         char scripts_path[MAXPATHLEN];
1596         char script_path[MAXPATHLEN];
1597         DIR *scripts_dir, *lang_dir;
1598         char lang_path[MAXPATHLEN];
1599         char *__script_root;
1600
1601         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1602
1603         scripts_dir = opendir(scripts_path);
1604         if (!scripts_dir)
1605                 return NULL;
1606
1607         for_each_lang(scripts_path, scripts_dir, lang_dirent) {
1608                 scnprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1609                           lang_dirent->d_name);
1610                 lang_dir = opendir(lang_path);
1611                 if (!lang_dir)
1612                         continue;
1613
1614                 for_each_script(lang_path, lang_dir, script_dirent) {
1615                         __script_root = get_script_root(script_dirent, suffix);
1616                         if (__script_root && !strcmp(script_root, __script_root)) {
1617                                 free(__script_root);
1618                                 closedir(lang_dir);
1619                                 closedir(scripts_dir);
1620                                 scnprintf(script_path, MAXPATHLEN, "%s/%s",
1621                                           lang_path, script_dirent->d_name);
1622                                 return strdup(script_path);
1623                         }
1624                         free(__script_root);
1625                 }
1626                 closedir(lang_dir);
1627         }
1628         closedir(scripts_dir);
1629
1630         return NULL;
1631 }
1632
1633 static bool is_top_script(const char *script_path)
1634 {
1635         return ends_with(script_path, "top") == NULL ? false : true;
1636 }
1637
1638 static int has_required_arg(char *script_path)
1639 {
1640         struct script_desc *desc;
1641         int n_args = 0;
1642         char *p;
1643
1644         desc = script_desc__new(NULL);
1645
1646         if (read_script_info(desc, script_path))
1647                 goto out;
1648
1649         if (!desc->args)
1650                 goto out;
1651
1652         for (p = desc->args; *p; p++)
1653                 if (*p == '<')
1654                         n_args++;
1655 out:
1656         script_desc__delete(desc);
1657
1658         return n_args;
1659 }
1660
1661 static int have_cmd(int argc, const char **argv)
1662 {
1663         char **__argv = malloc(sizeof(const char *) * argc);
1664
1665         if (!__argv) {
1666                 pr_err("malloc failed\n");
1667                 return -1;
1668         }
1669
1670         memcpy(__argv, argv, sizeof(const char *) * argc);
1671         argc = parse_options(argc, (const char **)__argv, record_options,
1672                              NULL, PARSE_OPT_STOP_AT_NON_OPTION);
1673         free(__argv);
1674
1675         system_wide = (argc == 0);
1676
1677         return 0;
1678 }
1679
1680 static void script__setup_sample_type(struct perf_script *script)
1681 {
1682         struct perf_session *session = script->session;
1683         u64 sample_type = perf_evlist__combined_sample_type(session->evlist);
1684
1685         if (symbol_conf.use_callchain || symbol_conf.cumulate_callchain) {
1686                 if ((sample_type & PERF_SAMPLE_REGS_USER) &&
1687                     (sample_type & PERF_SAMPLE_STACK_USER))
1688                         callchain_param.record_mode = CALLCHAIN_DWARF;
1689                 else if (sample_type & PERF_SAMPLE_BRANCH_STACK)
1690                         callchain_param.record_mode = CALLCHAIN_LBR;
1691                 else
1692                         callchain_param.record_mode = CALLCHAIN_FP;
1693         }
1694 }
1695
1696 int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
1697 {
1698         bool show_full_info = false;
1699         bool header = false;
1700         bool header_only = false;
1701         bool script_started = false;
1702         char *rec_script_path = NULL;
1703         char *rep_script_path = NULL;
1704         struct perf_session *session;
1705         struct itrace_synth_opts itrace_synth_opts = { .set = false, };
1706         char *script_path = NULL;
1707         const char **__argv;
1708         int i, j, err = 0;
1709         struct perf_script script = {
1710                 .tool = {
1711                         .sample          = process_sample_event,
1712                         .mmap            = perf_event__process_mmap,
1713                         .mmap2           = perf_event__process_mmap2,
1714                         .comm            = perf_event__process_comm,
1715                         .exit            = perf_event__process_exit,
1716                         .fork            = perf_event__process_fork,
1717                         .attr            = process_attr,
1718                         .tracing_data    = perf_event__process_tracing_data,
1719                         .build_id        = perf_event__process_build_id,
1720                         .id_index        = perf_event__process_id_index,
1721                         .auxtrace_info   = perf_event__process_auxtrace_info,
1722                         .auxtrace        = perf_event__process_auxtrace,
1723                         .auxtrace_error  = perf_event__process_auxtrace_error,
1724                         .ordered_events  = true,
1725                         .ordering_requires_timestamps = true,
1726                 },
1727         };
1728         struct perf_data_file file = {
1729                 .mode = PERF_DATA_MODE_READ,
1730         };
1731         const struct option options[] = {
1732         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1733                     "dump raw trace in ASCII"),
1734         OPT_INCR('v', "verbose", &verbose,
1735                  "be more verbose (show symbol address, etc)"),
1736         OPT_BOOLEAN('L', "Latency", &latency_format,
1737                     "show latency attributes (irqs/preemption disabled, etc)"),
1738         OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
1739                            list_available_scripts),
1740         OPT_CALLBACK('s', "script", NULL, "name",
1741                      "script file name (lang:script name, script name, or *)",
1742                      parse_scriptname),
1743         OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
1744                    "generate perf-script.xx script in specified language"),
1745         OPT_STRING('i', "input", &input_name, "file", "input file name"),
1746         OPT_BOOLEAN('d', "debug-mode", &debug_mode,
1747                    "do various checks like samples ordering and lost events"),
1748         OPT_BOOLEAN(0, "header", &header, "Show data header."),
1749         OPT_BOOLEAN(0, "header-only", &header_only, "Show only data header."),
1750         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1751                    "file", "vmlinux pathname"),
1752         OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1753                    "file", "kallsyms pathname"),
1754         OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
1755                     "When printing symbols do not display call chain"),
1756         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1757                     "Look for files with symbols relative to this directory"),
1758         OPT_CALLBACK('F', "fields", NULL, "str",
1759                      "comma separated output fields prepend with 'type:'. "
1760                      "Valid types: hw,sw,trace,raw. "
1761                      "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
1762                      "addr,symoff,period,iregs,brstack,brstacksym,flags", parse_output_fields),
1763         OPT_BOOLEAN('a', "all-cpus", &system_wide,
1764                     "system-wide collection from all CPUs"),
1765         OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1766                    "only consider these symbols"),
1767         OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1768         OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1769                    "only display events for these comms"),
1770         OPT_STRING(0, "pid", &symbol_conf.pid_list_str, "pid[,pid...]",
1771                    "only consider symbols in these pids"),
1772         OPT_STRING(0, "tid", &symbol_conf.tid_list_str, "tid[,tid...]",
1773                    "only consider symbols in these tids"),
1774         OPT_BOOLEAN('I', "show-info", &show_full_info,
1775                     "display extended information from perf.data file"),
1776         OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
1777                     "Show the path of [kernel.kallsyms]"),
1778         OPT_BOOLEAN('\0', "show-task-events", &script.show_task_events,
1779                     "Show the fork/comm/exit events"),
1780         OPT_BOOLEAN('\0', "show-mmap-events", &script.show_mmap_events,
1781                     "Show the mmap events"),
1782         OPT_BOOLEAN('\0', "show-switch-events", &script.show_switch_events,
1783                     "Show context switch events (if recorded)"),
1784         OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
1785         OPT_BOOLEAN(0, "ns", &nanosecs,
1786                     "Use 9 decimal places when displaying time"),
1787         OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
1788                             "Instruction Tracing options",
1789                             itrace_parse_synth_opts),
1790         OPT_BOOLEAN(0, "full-source-path", &srcline_full_filename,
1791                         "Show full source file name path for source lines"),
1792         OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
1793                         "Enable symbol demangling"),
1794         OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1795                         "Enable kernel symbol demangling"),
1796
1797         OPT_END()
1798         };
1799         const char * const script_subcommands[] = { "record", "report", NULL };
1800         const char *script_usage[] = {
1801                 "perf script [<options>]",
1802                 "perf script [<options>] record <script> [<record-options>] <command>",
1803                 "perf script [<options>] report <script> [script-args]",
1804                 "perf script [<options>] <script> [<record-options>] <command>",
1805                 "perf script [<options>] <top-script> [script-args]",
1806                 NULL
1807         };
1808
1809         setup_scripting();
1810
1811         argc = parse_options_subcommand(argc, argv, options, script_subcommands, script_usage,
1812                              PARSE_OPT_STOP_AT_NON_OPTION);
1813
1814         file.path = input_name;
1815
1816         if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
1817                 rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
1818                 if (!rec_script_path)
1819                         return cmd_record(argc, argv, NULL);
1820         }
1821
1822         if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
1823                 rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
1824                 if (!rep_script_path) {
1825                         fprintf(stderr,
1826                                 "Please specify a valid report script"
1827                                 "(see 'perf script -l' for listing)\n");
1828                         return -1;
1829                 }
1830         }
1831
1832         if (itrace_synth_opts.callchain &&
1833             itrace_synth_opts.callchain_sz > scripting_max_stack)
1834                 scripting_max_stack = itrace_synth_opts.callchain_sz;
1835
1836         /* make sure PERF_EXEC_PATH is set for scripts */
1837         perf_set_argv_exec_path(perf_exec_path());
1838
1839         if (argc && !script_name && !rec_script_path && !rep_script_path) {
1840                 int live_pipe[2];
1841                 int rep_args;
1842                 pid_t pid;
1843
1844                 rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
1845                 rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
1846
1847                 if (!rec_script_path && !rep_script_path) {
1848                         usage_with_options_msg(script_usage, options,
1849                                 "Couldn't find script `%s'\n\n See perf"
1850                                 " script -l for available scripts.\n", argv[0]);
1851                 }
1852
1853                 if (is_top_script(argv[0])) {
1854                         rep_args = argc - 1;
1855                 } else {
1856                         int rec_args;
1857
1858                         rep_args = has_required_arg(rep_script_path);
1859                         rec_args = (argc - 1) - rep_args;
1860                         if (rec_args < 0) {
1861                                 usage_with_options_msg(script_usage, options,
1862                                         "`%s' script requires options."
1863                                         "\n\n See perf script -l for available "
1864                                         "scripts and options.\n", argv[0]);
1865                         }
1866                 }
1867
1868                 if (pipe(live_pipe) < 0) {
1869                         perror("failed to create pipe");
1870                         return -1;
1871                 }
1872
1873                 pid = fork();
1874                 if (pid < 0) {
1875                         perror("failed to fork");
1876                         return -1;
1877                 }
1878
1879                 if (!pid) {
1880                         j = 0;
1881
1882                         dup2(live_pipe[1], 1);
1883                         close(live_pipe[0]);
1884
1885                         if (is_top_script(argv[0])) {
1886                                 system_wide = true;
1887                         } else if (!system_wide) {
1888                                 if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
1889                                         err = -1;
1890                                         goto out;
1891                                 }
1892                         }
1893
1894                         __argv = malloc((argc + 6) * sizeof(const char *));
1895                         if (!__argv) {
1896                                 pr_err("malloc failed\n");
1897                                 err = -ENOMEM;
1898                                 goto out;
1899                         }
1900
1901                         __argv[j++] = "/bin/sh";
1902                         __argv[j++] = rec_script_path;
1903                         if (system_wide)
1904                                 __argv[j++] = "-a";
1905                         __argv[j++] = "-q";
1906                         __argv[j++] = "-o";
1907                         __argv[j++] = "-";
1908                         for (i = rep_args + 1; i < argc; i++)
1909                                 __argv[j++] = argv[i];
1910                         __argv[j++] = NULL;
1911
1912                         execvp("/bin/sh", (char **)__argv);
1913                         free(__argv);
1914                         exit(-1);
1915                 }
1916
1917                 dup2(live_pipe[0], 0);
1918                 close(live_pipe[1]);
1919
1920                 __argv = malloc((argc + 4) * sizeof(const char *));
1921                 if (!__argv) {
1922                         pr_err("malloc failed\n");
1923                         err = -ENOMEM;
1924                         goto out;
1925                 }
1926
1927                 j = 0;
1928                 __argv[j++] = "/bin/sh";
1929                 __argv[j++] = rep_script_path;
1930                 for (i = 1; i < rep_args + 1; i++)
1931                         __argv[j++] = argv[i];
1932                 __argv[j++] = "-i";
1933                 __argv[j++] = "-";
1934                 __argv[j++] = NULL;
1935
1936                 execvp("/bin/sh", (char **)__argv);
1937                 free(__argv);
1938                 exit(-1);
1939         }
1940
1941         if (rec_script_path)
1942                 script_path = rec_script_path;
1943         if (rep_script_path)
1944                 script_path = rep_script_path;
1945
1946         if (script_path) {
1947                 j = 0;
1948
1949                 if (!rec_script_path)
1950                         system_wide = false;
1951                 else if (!system_wide) {
1952                         if (have_cmd(argc - 1, &argv[1]) != 0) {
1953                                 err = -1;
1954                                 goto out;
1955                         }
1956                 }
1957
1958                 __argv = malloc((argc + 2) * sizeof(const char *));
1959                 if (!__argv) {
1960                         pr_err("malloc failed\n");
1961                         err = -ENOMEM;
1962                         goto out;
1963                 }
1964
1965                 __argv[j++] = "/bin/sh";
1966                 __argv[j++] = script_path;
1967                 if (system_wide)
1968                         __argv[j++] = "-a";
1969                 for (i = 2; i < argc; i++)
1970                         __argv[j++] = argv[i];
1971                 __argv[j++] = NULL;
1972
1973                 execvp("/bin/sh", (char **)__argv);
1974                 free(__argv);
1975                 exit(-1);
1976         }
1977
1978         if (!script_name)
1979                 setup_pager();
1980
1981         session = perf_session__new(&file, false, &script.tool);
1982         if (session == NULL)
1983                 return -1;
1984
1985         if (header || header_only) {
1986                 perf_session__fprintf_info(session, stdout, show_full_info);
1987                 if (header_only)
1988                         goto out_delete;
1989         }
1990
1991         if (symbol__init(&session->header.env) < 0)
1992                 goto out_delete;
1993
1994         script.session = session;
1995         script__setup_sample_type(&script);
1996
1997         session->itrace_synth_opts = &itrace_synth_opts;
1998
1999         if (cpu_list) {
2000                 err = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap);
2001                 if (err < 0)
2002                         goto out_delete;
2003         }
2004
2005         if (!no_callchain)
2006                 symbol_conf.use_callchain = true;
2007         else
2008                 symbol_conf.use_callchain = false;
2009
2010         if (session->tevent.pevent &&
2011             pevent_set_function_resolver(session->tevent.pevent,
2012                                          machine__resolve_kernel_addr,
2013                                          &session->machines.host) < 0) {
2014                 pr_err("%s: failed to set libtraceevent function resolver\n", __func__);
2015                 return -1;
2016         }
2017
2018         if (generate_script_lang) {
2019                 struct stat perf_stat;
2020                 int input;
2021
2022                 if (output_set_by_user()) {
2023                         fprintf(stderr,
2024                                 "custom fields not supported for generated scripts");
2025                         err = -EINVAL;
2026                         goto out_delete;
2027                 }
2028
2029                 input = open(file.path, O_RDONLY);      /* input_name */
2030                 if (input < 0) {
2031                         err = -errno;
2032                         perror("failed to open file");
2033                         goto out_delete;
2034                 }
2035
2036                 err = fstat(input, &perf_stat);
2037                 if (err < 0) {
2038                         perror("failed to stat file");
2039                         goto out_delete;
2040                 }
2041
2042                 if (!perf_stat.st_size) {
2043                         fprintf(stderr, "zero-sized file, nothing to do!\n");
2044                         goto out_delete;
2045                 }
2046
2047                 scripting_ops = script_spec__lookup(generate_script_lang);
2048                 if (!scripting_ops) {
2049                         fprintf(stderr, "invalid language specifier");
2050                         err = -ENOENT;
2051                         goto out_delete;
2052                 }
2053
2054                 err = scripting_ops->generate_script(session->tevent.pevent,
2055                                                      "perf-script");
2056                 goto out_delete;
2057         }
2058
2059         if (script_name) {
2060                 err = scripting_ops->start_script(script_name, argc, argv);
2061                 if (err)
2062                         goto out_delete;
2063                 pr_debug("perf script started with script %s\n\n", script_name);
2064                 script_started = true;
2065         }
2066
2067
2068         err = perf_session__check_output_opt(session);
2069         if (err < 0)
2070                 goto out_delete;
2071
2072         err = __cmd_script(&script);
2073
2074         flush_scripting();
2075
2076 out_delete:
2077         perf_session__delete(session);
2078
2079         if (script_started)
2080                 cleanup_scripting();
2081 out:
2082         return err;
2083 }