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/util.h"
  14 #include "util/evlist.h"
  15 #include "util/evsel.h"
  16 #include <linux/bitmap.h>
  17
  18 static char const               *script_name;
  19 static char const               *generate_script_lang;
  20 static bool                     debug_mode;
  21 static u64                      last_timestamp;
  22 static u64                      nr_unordered;
  23 extern const struct option      record_options[];
  24 static bool                     no_callchain;
  25 static bool                     show_full_info;
  26 static const char               *cpu_list;
  27 static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
  28
  29 enum perf_output_field {
  30         PERF_OUTPUT_COMM            = 1U << 0,
  31         PERF_OUTPUT_TID             = 1U << 1,
  32         PERF_OUTPUT_PID             = 1U << 2,
  33         PERF_OUTPUT_TIME            = 1U << 3,
  34         PERF_OUTPUT_CPU             = 1U << 4,
  35         PERF_OUTPUT_EVNAME          = 1U << 5,
  36         PERF_OUTPUT_TRACE           = 1U << 6,
  37         PERF_OUTPUT_IP              = 1U << 7,
  38         PERF_OUTPUT_SYM             = 1U << 8,
  39         PERF_OUTPUT_DSO             = 1U << 9,
  40         PERF_OUTPUT_ADDR            = 1U << 10,
  41 };
  42
  43 struct output_option {
  44         const char *str;
  45         enum perf_output_field field;
  46 } all_output_options[] = {
  47         {.str = "comm",  .field = PERF_OUTPUT_COMM},
  48         {.str = "tid",   .field = PERF_OUTPUT_TID},
  49         {.str = "pid",   .field = PERF_OUTPUT_PID},
  50         {.str = "time",  .field = PERF_OUTPUT_TIME},
  51         {.str = "cpu",   .field = PERF_OUTPUT_CPU},
  52         {.str = "event", .field = PERF_OUTPUT_EVNAME},
  53         {.str = "trace", .field = PERF_OUTPUT_TRACE},
  54         {.str = "ip",    .field = PERF_OUTPUT_IP},
  55         {.str = "sym",   .field = PERF_OUTPUT_SYM},
  56         {.str = "dso",   .field = PERF_OUTPUT_DSO},
  57         {.str = "addr",  .field = PERF_OUTPUT_ADDR},
  58 };
  59
  60 /* default set to maintain compatibility with current format */
  61 static struct {
  62         bool user_set;
  63         bool wildcard_set;
  64         u64 fields;
  65         u64 invalid_fields;
  66 } output[PERF_TYPE_MAX] = {
  67
  68         [PERF_TYPE_HARDWARE] = {
  69                 .user_set = false,
  70
  71                 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
  72                               PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
  73                               PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
  74                                   PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
  75
  76                 .invalid_fields = PERF_OUTPUT_TRACE,
  77         },
  78
  79         [PERF_TYPE_SOFTWARE] = {
  80                 .user_set = false,
  81
  82                 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
  83                               PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
  84                               PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
  85                                   PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
  86
  87                 .invalid_fields = PERF_OUTPUT_TRACE,
  88         },
  89
  90         [PERF_TYPE_TRACEPOINT] = {
  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_TRACE,
  96         },
  97
  98         [PERF_TYPE_RAW] = {
  99                 .user_set = false,
 100
 101                 .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
 102                               PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
 103                               PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
 104                                   PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
 105
 106                 .invalid_fields = PERF_OUTPUT_TRACE,
 107         },
 108 };
 109
 110 static bool output_set_by_user(void)
 111 {
 112         int j;
 113         for (j = 0; j < PERF_TYPE_MAX; ++j) {
 114                 if (output[j].user_set)
 115                         return true;
 116         }
 117         return false;
 118 }
 119
 120 static const char *output_field2str(enum perf_output_field field)
 121 {
 122         int i, imax = ARRAY_SIZE(all_output_options);
 123         const char *str = "";
 124
 125         for (i = 0; i < imax; ++i) {
 126                 if (all_output_options[i].field == field) {
 127                         str = all_output_options[i].str;
 128                         break;
 129                 }
 130         }
 131         return str;
 132 }
 133
 134 #define PRINT_FIELD(x)  (output[attr->type].fields & PERF_OUTPUT_##x)
 135
 136 static int perf_event_attr__check_stype(struct perf_event_attr *attr,
 137                                   u64 sample_type, const char *sample_msg,
 138                                   enum perf_output_field field)
 139 {
 140         int type = attr->type;
 141         const char *evname;
 142
 143         if (attr->sample_type & sample_type)
 144                 return 0;
 145
 146         if (output[type].user_set) {
 147                 evname = __event_name(attr->type, attr->config);
 148                 pr_err("Samples for '%s' event do not have %s attribute set. "
 149                        "Cannot print '%s' field.\n",
 150                        evname, sample_msg, output_field2str(field));
 151                 return -1;
 152         }
 153
 154         /* user did not ask for it explicitly so remove from the default list */
 155         output[type].fields &= ~field;
 156         evname = __event_name(attr->type, attr->config);
 157         pr_debug("Samples for '%s' event do not have %s attribute set. "
 158                  "Skipping '%s' field.\n",
 159                  evname, sample_msg, output_field2str(field));
 160
 161         return 0;
 162 }
 163
 164 static int perf_evsel__check_attr(struct perf_evsel *evsel,
 165                                   struct perf_session *session)
 166 {
 167         struct perf_event_attr *attr = &evsel->attr;
 168
 169         if (PRINT_FIELD(TRACE) &&
 170                 !perf_session__has_traces(session, "record -R"))
 171                 return -EINVAL;
 172
 173         if (PRINT_FIELD(IP)) {
 174                 if (perf_event_attr__check_stype(attr, PERF_SAMPLE_IP, "IP",
 175                                            PERF_OUTPUT_IP))
 176                         return -EINVAL;
 177
 178                 if (!no_callchain &&
 179                     !(attr->sample_type & PERF_SAMPLE_CALLCHAIN))
 180                         symbol_conf.use_callchain = false;
 181         }
 182
 183         if (PRINT_FIELD(ADDR) &&
 184                 perf_event_attr__check_stype(attr, PERF_SAMPLE_ADDR, "ADDR",
 185                                        PERF_OUTPUT_ADDR))
 186                 return -EINVAL;
 187
 188         if (PRINT_FIELD(SYM) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
 189                 pr_err("Display of symbols requested but neither sample IP nor "
 190                            "sample address\nis selected. Hence, no addresses to convert "
 191                        "to symbols.\n");
 192                 return -EINVAL;
 193         }
 194         if (PRINT_FIELD(DSO) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
 195                 pr_err("Display of DSO requested but neither sample IP nor "
 196                            "sample address\nis selected. Hence, no addresses to convert "
 197                        "to DSO.\n");
 198                 return -EINVAL;
 199         }
 200
 201         if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
 202                 perf_event_attr__check_stype(attr, PERF_SAMPLE_TID, "TID",
 203                                        PERF_OUTPUT_TID|PERF_OUTPUT_PID))
 204                 return -EINVAL;
 205
 206         if (PRINT_FIELD(TIME) &&
 207                 perf_event_attr__check_stype(attr, PERF_SAMPLE_TIME, "TIME",
 208                                        PERF_OUTPUT_TIME))
 209                 return -EINVAL;
 210
 211         if (PRINT_FIELD(CPU) &&
 212                 perf_event_attr__check_stype(attr, PERF_SAMPLE_CPU, "CPU",
 213                                        PERF_OUTPUT_CPU))
 214                 return -EINVAL;
 215
 216         return 0;
 217 }
 218
 219 /*
 220  * verify all user requested events exist and the samples
 221  * have the expected data
 222  */
 223 static int perf_session__check_output_opt(struct perf_session *session)
 224 {
 225         int j;
 226         struct perf_evsel *evsel;
 227
 228         for (j = 0; j < PERF_TYPE_MAX; ++j) {
 229                 evsel = perf_session__find_first_evtype(session, j);
 230
 231                 /*
 232                  * even if fields is set to 0 (ie., show nothing) event must
 233                  * exist if user explicitly includes it on the command line
 234                  */
 235                 if (!evsel && output[j].user_set && !output[j].wildcard_set) {
 236                         pr_err("%s events do not exist. "
 237                                "Remove corresponding -f option to proceed.\n",
 238                                event_type(j));
 239                         return -1;
 240                 }
 241
 242                 if (evsel && output[j].fields &&
 243                         perf_evsel__check_attr(evsel, session))
 244                         return -1;
 245         }
 246
 247         return 0;
 248 }
 249
 250 static void print_sample_start(struct perf_sample *sample,
 251                                struct thread *thread,
 252                                struct perf_event_attr *attr)
 253 {
 254         int type;
 255         struct event *event;
 256         const char *evname = NULL;
 257         unsigned long secs;
 258         unsigned long usecs;
 259         unsigned long long nsecs;
 260
 261         if (PRINT_FIELD(COMM)) {
 262                 if (latency_format)
 263                         printf("%8.8s ", thread->comm);
 264                 else if (PRINT_FIELD(IP) && symbol_conf.use_callchain)
 265                         printf("%s ", thread->comm);
 266                 else
 267                         printf("%16s ", thread->comm);
 268         }
 269
 270         if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
 271                 printf("%5d/%-5d ", sample->pid, sample->tid);
 272         else if (PRINT_FIELD(PID))
 273                 printf("%5d ", sample->pid);
 274         else if (PRINT_FIELD(TID))
 275                 printf("%5d ", sample->tid);
 276
 277         if (PRINT_FIELD(CPU)) {
 278                 if (latency_format)
 279                         printf("%3d ", sample->cpu);
 280                 else
 281                         printf("[%03d] ", sample->cpu);
 282         }
 283
 284         if (PRINT_FIELD(TIME)) {
 285                 nsecs = sample->time;
 286                 secs = nsecs / NSECS_PER_SEC;
 287                 nsecs -= secs * NSECS_PER_SEC;
 288                 usecs = nsecs / NSECS_PER_USEC;
 289                 printf("%5lu.%06lu: ", secs, usecs);
 290         }
 291
 292         if (PRINT_FIELD(EVNAME)) {
 293                 if (attr->type == PERF_TYPE_TRACEPOINT) {
 294                         type = trace_parse_common_type(sample->raw_data);
 295                         event = trace_find_event(type);
 296                         if (event)
 297                                 evname = event->name;
 298                 } else
 299                         evname = __event_name(attr->type, attr->config);
 300
 301                 printf("%s: ", evname ? evname : "(unknown)");
 302         }
 303 }
 304
 305 static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
 306 {
 307         if ((attr->type == PERF_TYPE_SOFTWARE) &&
 308             ((attr->config == PERF_COUNT_SW_PAGE_FAULTS) ||
 309              (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN) ||
 310              (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)))
 311                 return true;
 312
 313         return false;
 314 }
 315
 316 static void print_sample_addr(union perf_event *event,
 317                           struct perf_sample *sample,
 318                           struct perf_session *session,
 319                           struct thread *thread,
 320                           struct perf_event_attr *attr)
 321 {
 322         struct addr_location al;
 323         u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 324         const char *symname, *dsoname;
 325
 326         printf("%16" PRIx64, sample->addr);
 327
 328         if (!sample_addr_correlates_sym(attr))
 329                 return;
 330
 331         thread__find_addr_map(thread, session, cpumode, MAP__FUNCTION,
 332                               event->ip.pid, sample->addr, &al);
 333         if (!al.map)
 334                 thread__find_addr_map(thread, session, cpumode, MAP__VARIABLE,
 335                                       event->ip.pid, sample->addr, &al);
 336
 337         al.cpu = sample->cpu;
 338         al.sym = NULL;
 339
 340         if (al.map)
 341                 al.sym = map__find_symbol(al.map, al.addr, NULL);
 342
 343         if (PRINT_FIELD(SYM)) {
 344                 if (al.sym && al.sym->name)
 345                         symname = al.sym->name;
 346                 else
 347                         symname = "";
 348
 349                 printf(" %16s", symname);
 350         }
 351
 352         if (PRINT_FIELD(DSO)) {
 353                 if (al.map && al.map->dso && al.map->dso->name)
 354                         dsoname = al.map->dso->name;
 355                 else
 356                         dsoname = "";
 357
 358                 printf(" (%s)", dsoname);
 359         }
 360 }
 361
 362 static void process_event(union perf_event *event __unused,
 363                           struct perf_sample *sample,
 364                           struct perf_evsel *evsel,
 365                           struct perf_session *session,
 366                           struct thread *thread)
 367 {
 368         struct perf_event_attr *attr = &evsel->attr;
 369
 370         if (output[attr->type].fields == 0)
 371                 return;
 372
 373         print_sample_start(sample, thread, attr);
 374
 375         if (PRINT_FIELD(TRACE))
 376                 print_trace_event(sample->cpu, sample->raw_data,
 377                                   sample->raw_size);
 378
 379         if (PRINT_FIELD(ADDR))
 380                 print_sample_addr(event, sample, session, thread, attr);
 381
 382         if (PRINT_FIELD(IP)) {
 383                 if (!symbol_conf.use_callchain)
 384                         printf(" ");
 385                 else
 386                         printf("\n");
 387                 perf_session__print_ip(event, sample, session,
 388                                               PRINT_FIELD(SYM), PRINT_FIELD(DSO));
 389         }
 390
 391         printf("\n");
 392 }
 393
 394 static int default_start_script(const char *script __unused,
 395                                 int argc __unused,
 396                                 const char **argv __unused)
 397 {
 398         return 0;
 399 }
 400
 401 static int default_stop_script(void)
 402 {
 403         return 0;
 404 }
 405
 406 static int default_generate_script(const char *outfile __unused)
 407 {
 408         return 0;
 409 }
 410
 411 static struct scripting_ops default_scripting_ops = {
 412         .start_script           = default_start_script,
 413         .stop_script            = default_stop_script,
 414         .process_event          = process_event,
 415         .generate_script        = default_generate_script,
 416 };
 417
 418 static struct scripting_ops     *scripting_ops;
 419
 420 static void setup_scripting(void)
 421 {
 422         setup_perl_scripting();
 423         setup_python_scripting();
 424
 425         scripting_ops = &default_scripting_ops;
 426 }
 427
 428 static int cleanup_scripting(void)
 429 {
 430         pr_debug("\nperf script stopped\n");
 431
 432         return scripting_ops->stop_script();
 433 }
 434
 435 static char const               *input_name = "perf.data";
 436
 437 static int process_sample_event(union perf_event *event,
 438                                 struct perf_sample *sample,
 439                                 struct perf_evsel *evsel,
 440                                 struct perf_session *session)
 441 {
 442         struct thread *thread = perf_session__findnew(session, event->ip.pid);
 443
 444         if (thread == NULL) {
 445                 pr_debug("problem processing %d event, skipping it.\n",
 446                          event->header.type);
 447                 return -1;
 448         }
 449
 450         if (debug_mode) {
 451                 if (sample->time < last_timestamp) {
 452                         pr_err("Samples misordered, previous: %" PRIu64
 453                                 " this: %" PRIu64 "\n", last_timestamp,
 454                                 sample->time);
 455                         nr_unordered++;
 456                 }
 457                 last_timestamp = sample->time;
 458                 return 0;
 459         }
 460
 461         if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
 462                 return 0;
 463
 464         scripting_ops->process_event(event, sample, evsel, session, thread);
 465
 466         session->hists.stats.total_period += sample->period;
 467         return 0;
 468 }
 469
 470 static struct perf_event_ops event_ops = {
 471         .sample          = process_sample_event,
 472         .mmap            = perf_event__process_mmap,
 473         .comm            = perf_event__process_comm,
 474         .exit            = perf_event__process_task,
 475         .fork            = perf_event__process_task,
 476         .attr            = perf_event__process_attr,
 477         .event_type      = perf_event__process_event_type,
 478         .tracing_data    = perf_event__process_tracing_data,
 479         .build_id        = perf_event__process_build_id,
 480         .ordered_samples = true,
 481         .ordering_requires_timestamps = true,
 482 };
 483
 484 extern volatile int session_done;
 485
 486 static void sig_handler(int sig __unused)
 487 {
 488         session_done = 1;
 489 }
 490
 491 static int __cmd_script(struct perf_session *session)
 492 {
 493         int ret;
 494
 495         signal(SIGINT, sig_handler);
 496
 497         ret = perf_session__process_events(session, &event_ops);
 498
 499         if (debug_mode)
 500                 pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
 501
 502         return ret;
 503 }
 504
 505 struct script_spec {
 506         struct list_head        node;
 507         struct scripting_ops    *ops;
 508         char                    spec[0];
 509 };
 510
 511 static LIST_HEAD(script_specs);
 512
 513 static struct script_spec *script_spec__new(const char *spec,
 514                                             struct scripting_ops *ops)
 515 {
 516         struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
 517
 518         if (s != NULL) {
 519                 strcpy(s->spec, spec);
 520                 s->ops = ops;
 521         }
 522
 523         return s;
 524 }
 525
 526 static void script_spec__delete(struct script_spec *s)
 527 {
 528         free(s->spec);
 529         free(s);
 530 }
 531
 532 static void script_spec__add(struct script_spec *s)
 533 {
 534         list_add_tail(&s->node, &script_specs);
 535 }
 536
 537 static struct script_spec *script_spec__find(const char *spec)
 538 {
 539         struct script_spec *s;
 540
 541         list_for_each_entry(s, &script_specs, node)
 542                 if (strcasecmp(s->spec, spec) == 0)
 543                         return s;
 544         return NULL;
 545 }
 546
 547 static struct script_spec *script_spec__findnew(const char *spec,
 548                                                 struct scripting_ops *ops)
 549 {
 550         struct script_spec *s = script_spec__find(spec);
 551
 552         if (s)
 553                 return s;
 554
 555         s = script_spec__new(spec, ops);
 556         if (!s)
 557                 goto out_delete_spec;
 558
 559         script_spec__add(s);
 560
 561         return s;
 562
 563 out_delete_spec:
 564         script_spec__delete(s);
 565
 566         return NULL;
 567 }
 568
 569 int script_spec_register(const char *spec, struct scripting_ops *ops)
 570 {
 571         struct script_spec *s;
 572
 573         s = script_spec__find(spec);
 574         if (s)
 575                 return -1;
 576
 577         s = script_spec__findnew(spec, ops);
 578         if (!s)
 579                 return -1;
 580
 581         return 0;
 582 }
 583
 584 static struct scripting_ops *script_spec__lookup(const char *spec)
 585 {
 586         struct script_spec *s = script_spec__find(spec);
 587         if (!s)
 588                 return NULL;
 589
 590         return s->ops;
 591 }
 592
 593 static void list_available_languages(void)
 594 {
 595         struct script_spec *s;
 596
 597         fprintf(stderr, "\n");
 598         fprintf(stderr, "Scripting language extensions (used in "
 599                 "perf script -s [spec:]script.[spec]):\n\n");
 600
 601         list_for_each_entry(s, &script_specs, node)
 602                 fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
 603
 604         fprintf(stderr, "\n");
 605 }
 606
 607 static int parse_scriptname(const struct option *opt __used,
 608                             const char *str, int unset __used)
 609 {
 610         char spec[PATH_MAX];
 611         const char *script, *ext;
 612         int len;
 613
 614         if (strcmp(str, "lang") == 0) {
 615                 list_available_languages();
 616                 exit(0);
 617         }
 618
 619         script = strchr(str, ':');
 620         if (script) {
 621                 len = script - str;
 622                 if (len >= PATH_MAX) {
 623                         fprintf(stderr, "invalid language specifier");
 624                         return -1;
 625                 }
 626                 strncpy(spec, str, len);
 627                 spec[len] = '\0';
 628                 scripting_ops = script_spec__lookup(spec);
 629                 if (!scripting_ops) {
 630                         fprintf(stderr, "invalid language specifier");
 631                         return -1;
 632                 }
 633                 script++;
 634         } else {
 635                 script = str;
 636                 ext = strrchr(script, '.');
 637                 if (!ext) {
 638                         fprintf(stderr, "invalid script extension");
 639                         return -1;
 640                 }
 641                 scripting_ops = script_spec__lookup(++ext);
 642                 if (!scripting_ops) {
 643                         fprintf(stderr, "invalid script extension");
 644                         return -1;
 645                 }
 646         }
 647
 648         script_name = strdup(script);
 649
 650         return 0;
 651 }
 652
 653 static int parse_output_fields(const struct option *opt __used,
 654                             const char *arg, int unset __used)
 655 {
 656         char *tok;
 657         int i, imax = sizeof(all_output_options) / sizeof(struct output_option);
 658         int j;
 659         int rc = 0;
 660         char *str = strdup(arg);
 661         int type = -1;
 662
 663         if (!str)
 664                 return -ENOMEM;
 665
 666         /* first word can state for which event type the user is specifying
 667          * the fields. If no type exists, the specified fields apply to all
 668          * event types found in the file minus the invalid fields for a type.
 669          */
 670         tok = strchr(str, ':');
 671         if (tok) {
 672                 *tok = '\0';
 673                 tok++;
 674                 if (!strcmp(str, "hw"))
 675                         type = PERF_TYPE_HARDWARE;
 676                 else if (!strcmp(str, "sw"))
 677                         type = PERF_TYPE_SOFTWARE;
 678                 else if (!strcmp(str, "trace"))
 679                         type = PERF_TYPE_TRACEPOINT;
 680                 else if (!strcmp(str, "raw"))
 681                         type = PERF_TYPE_RAW;
 682                 else {
 683                         fprintf(stderr, "Invalid event type in field string.\n");
 684                         return -EINVAL;
 685                 }
 686
 687                 if (output[type].user_set)
 688                         pr_warning("Overriding previous field request for %s events.\n",
 689                                    event_type(type));
 690
 691                 output[type].fields = 0;
 692                 output[type].user_set = true;
 693                 output[type].wildcard_set = false;
 694
 695         } else {
 696                 tok = str;
 697                 if (strlen(str) == 0) {
 698                         fprintf(stderr,
 699                                 "Cannot set fields to 'none' for all event types.\n");
 700                         rc = -EINVAL;
 701                         goto out;
 702                 }
 703
 704                 if (output_set_by_user())
 705                         pr_warning("Overriding previous field request for all events.\n");
 706
 707                 for (j = 0; j < PERF_TYPE_MAX; ++j) {
 708                         output[j].fields = 0;
 709                         output[j].user_set = true;
 710                         output[j].wildcard_set = true;
 711                 }
 712         }
 713
 714         tok = strtok(tok, ",");
 715         while (tok) {
 716                 for (i = 0; i < imax; ++i) {
 717                         if (strcmp(tok, all_output_options[i].str) == 0)
 718                                 break;
 719                 }
 720                 if (i == imax) {
 721                         fprintf(stderr, "Invalid field requested.\n");
 722                         rc = -EINVAL;
 723                         goto out;
 724                 }
 725
 726                 if (type == -1) {
 727                         /* add user option to all events types for
 728                          * which it is valid
 729                          */
 730                         for (j = 0; j < PERF_TYPE_MAX; ++j) {
 731                                 if (output[j].invalid_fields & all_output_options[i].field) {
 732                                         pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
 733                                                    all_output_options[i].str, event_type(j));
 734                                 } else
 735                                         output[j].fields |= all_output_options[i].field;
 736                         }
 737                 } else {
 738                         if (output[type].invalid_fields & all_output_options[i].field) {
 739                                 fprintf(stderr, "\'%s\' not valid for %s events.\n",
 740                                          all_output_options[i].str, event_type(type));
 741
 742                                 rc = -EINVAL;
 743                                 goto out;
 744                         }
 745                         output[type].fields |= all_output_options[i].field;
 746                 }
 747
 748                 tok = strtok(NULL, ",");
 749         }
 750
 751         if (type >= 0) {
 752                 if (output[type].fields == 0) {
 753                         pr_debug("No fields requested for %s type. "
 754                                  "Events will not be displayed.\n", event_type(type));
 755                 }
 756         }
 757
 758 out:
 759         free(str);
 760         return rc;
 761 }
 762
 763 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
 764 static int is_directory(const char *base_path, const struct dirent *dent)
 765 {
 766         char path[PATH_MAX];
 767         struct stat st;
 768
 769         sprintf(path, "%s/%s", base_path, dent->d_name);
 770         if (stat(path, &st))
 771                 return 0;
 772
 773         return S_ISDIR(st.st_mode);
 774 }
 775
 776 #define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
 777         while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&     \
 778                lang_next)                                               \
 779                 if ((lang_dirent.d_type == DT_DIR ||                    \
 780                      (lang_dirent.d_type == DT_UNKNOWN &&               \
 781                       is_directory(scripts_path, &lang_dirent))) &&     \
 782                     (strcmp(lang_dirent.d_name, ".")) &&                \
 783                     (strcmp(lang_dirent.d_name, "..")))
 784
 785 #define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
 786         while (!readdir_r(lang_dir, &script_dirent, &script_next) &&    \
 787                script_next)                                             \
 788                 if (script_dirent.d_type != DT_DIR &&                   \
 789                     (script_dirent.d_type != DT_UNKNOWN ||              \
 790                      !is_directory(lang_path, &script_dirent)))
 791
 792
 793 #define RECORD_SUFFIX                   "-record"
 794 #define REPORT_SUFFIX                   "-report"
 795
 796 struct script_desc {
 797         struct list_head        node;
 798         char                    *name;
 799         char                    *half_liner;
 800         char                    *args;
 801 };
 802
 803 static LIST_HEAD(script_descs);
 804
 805 static struct script_desc *script_desc__new(const char *name)
 806 {
 807         struct script_desc *s = zalloc(sizeof(*s));
 808
 809         if (s != NULL && name)
 810                 s->name = strdup(name);
 811
 812         return s;
 813 }
 814
 815 static void script_desc__delete(struct script_desc *s)
 816 {
 817         free(s->name);
 818         free(s->half_liner);
 819         free(s->args);
 820         free(s);
 821 }
 822
 823 static void script_desc__add(struct script_desc *s)
 824 {
 825         list_add_tail(&s->node, &script_descs);
 826 }
 827
 828 static struct script_desc *script_desc__find(const char *name)
 829 {
 830         struct script_desc *s;
 831
 832         list_for_each_entry(s, &script_descs, node)
 833                 if (strcasecmp(s->name, name) == 0)
 834                         return s;
 835         return NULL;
 836 }
 837
 838 static struct script_desc *script_desc__findnew(const char *name)
 839 {
 840         struct script_desc *s = script_desc__find(name);
 841
 842         if (s)
 843                 return s;
 844
 845         s = script_desc__new(name);
 846         if (!s)
 847                 goto out_delete_desc;
 848
 849         script_desc__add(s);
 850
 851         return s;
 852
 853 out_delete_desc:
 854         script_desc__delete(s);
 855
 856         return NULL;
 857 }
 858
 859 static const char *ends_with(const char *str, const char *suffix)
 860 {
 861         size_t suffix_len = strlen(suffix);
 862         const char *p = str;
 863
 864         if (strlen(str) > suffix_len) {
 865                 p = str + strlen(str) - suffix_len;
 866                 if (!strncmp(p, suffix, suffix_len))
 867                         return p;
 868         }
 869
 870         return NULL;
 871 }
 872
 873 static char *ltrim(char *str)
 874 {
 875         int len = strlen(str);
 876
 877         while (len && isspace(*str)) {
 878                 len--;
 879                 str++;
 880         }
 881
 882         return str;
 883 }
 884
 885 static int read_script_info(struct script_desc *desc, const char *filename)
 886 {
 887         char line[BUFSIZ], *p;
 888         FILE *fp;
 889
 890         fp = fopen(filename, "r");
 891         if (!fp)
 892                 return -1;
 893
 894         while (fgets(line, sizeof(line), fp)) {
 895                 p = ltrim(line);
 896                 if (strlen(p) == 0)
 897                         continue;
 898                 if (*p != '#')
 899                         continue;
 900                 p++;
 901                 if (strlen(p) && *p == '!')
 902                         continue;
 903
 904                 p = ltrim(p);
 905                 if (strlen(p) && p[strlen(p) - 1] == '\n')
 906                         p[strlen(p) - 1] = '\0';
 907
 908                 if (!strncmp(p, "description:", strlen("description:"))) {
 909                         p += strlen("description:");
 910                         desc->half_liner = strdup(ltrim(p));
 911                         continue;
 912                 }
 913
 914                 if (!strncmp(p, "args:", strlen("args:"))) {
 915                         p += strlen("args:");
 916                         desc->args = strdup(ltrim(p));
 917                         continue;
 918                 }
 919         }
 920
 921         fclose(fp);
 922
 923         return 0;
 924 }
 925
 926 static int list_available_scripts(const struct option *opt __used,
 927                                   const char *s __used, int unset __used)
 928 {
 929         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
 930         char scripts_path[MAXPATHLEN];
 931         DIR *scripts_dir, *lang_dir;
 932         char script_path[MAXPATHLEN];
 933         char lang_path[MAXPATHLEN];
 934         struct script_desc *desc;
 935         char first_half[BUFSIZ];
 936         char *script_root;
 937         char *str;
 938
 939         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
 940
 941         scripts_dir = opendir(scripts_path);
 942         if (!scripts_dir)
 943                 return -1;
 944
 945         for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
 946                 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
 947                          lang_dirent.d_name);
 948                 lang_dir = opendir(lang_path);
 949                 if (!lang_dir)
 950                         continue;
 951
 952                 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
 953                         script_root = strdup(script_dirent.d_name);
 954                         str = (char *)ends_with(script_root, REPORT_SUFFIX);
 955                         if (str) {
 956                                 *str = '\0';
 957                                 desc = script_desc__findnew(script_root);
 958                                 snprintf(script_path, MAXPATHLEN, "%s/%s",
 959                                          lang_path, script_dirent.d_name);
 960                                 read_script_info(desc, script_path);
 961                         }
 962                         free(script_root);
 963                 }
 964         }
 965
 966         fprintf(stdout, "List of available trace scripts:\n");
 967         list_for_each_entry(desc, &script_descs, node) {
 968                 sprintf(first_half, "%s %s", desc->name,
 969                         desc->args ? desc->args : "");
 970                 fprintf(stdout, "  %-36s %s\n", first_half,
 971                         desc->half_liner ? desc->half_liner : "");
 972         }
 973
 974         exit(0);
 975 }
 976
 977 static char *get_script_path(const char *script_root, const char *suffix)
 978 {
 979         struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
 980         char scripts_path[MAXPATHLEN];
 981         char script_path[MAXPATHLEN];
 982         DIR *scripts_dir, *lang_dir;
 983         char lang_path[MAXPATHLEN];
 984         char *str, *__script_root;
 985         char *path = NULL;
 986
 987         snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
 988
 989         scripts_dir = opendir(scripts_path);
 990         if (!scripts_dir)
 991                 return NULL;
 992
 993         for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
 994                 snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
 995                          lang_dirent.d_name);
 996                 lang_dir = opendir(lang_path);
 997                 if (!lang_dir)
 998                         continue;
 999
1000                 for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1001                         __script_root = strdup(script_dirent.d_name);
1002                         str = (char *)ends_with(__script_root, suffix);
1003                         if (str) {
1004                                 *str = '\0';
1005                                 if (strcmp(__script_root, script_root))
1006                                         continue;
1007                                 snprintf(script_path, MAXPATHLEN, "%s/%s",
1008                                          lang_path, script_dirent.d_name);
1009                                 path = strdup(script_path);
1010                                 free(__script_root);
1011                                 break;
1012                         }
1013                         free(__script_root);
1014                 }
1015         }
1016
1017         return path;
1018 }
1019
1020 static bool is_top_script(const char *script_path)
1021 {
1022         return ends_with(script_path, "top") == NULL ? false : true;
1023 }
1024
1025 static int has_required_arg(char *script_path)
1026 {
1027         struct script_desc *desc;
1028         int n_args = 0;
1029         char *p;
1030
1031         desc = script_desc__new(NULL);
1032
1033         if (read_script_info(desc, script_path))
1034                 goto out;
1035
1036         if (!desc->args)
1037                 goto out;
1038
1039         for (p = desc->args; *p; p++)
1040                 if (*p == '<')
1041                         n_args++;
1042 out:
1043         script_desc__delete(desc);
1044
1045         return n_args;
1046 }
1047
1048 static const char * const script_usage[] = {
1049         "perf script [<options>]",
1050         "perf script [<options>] record <script> [<record-options>] <command>",
1051         "perf script [<options>] report <script> [script-args]",
1052         "perf script [<options>] <script> [<record-options>] <command>",
1053         "perf script [<options>] <top-script> [script-args]",
1054         NULL
1055 };
1056
1057 static const struct option options[] = {
1058         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1059                     "dump raw trace in ASCII"),
1060         OPT_INCR('v', "verbose", &verbose,
1061                     "be more verbose (show symbol address, etc)"),
1062         OPT_BOOLEAN('L', "Latency", &latency_format,
1063                     "show latency attributes (irqs/preemption disabled, etc)"),
1064         OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
1065                            list_available_scripts),
1066         OPT_CALLBACK('s', "script", NULL, "name",
1067                      "script file name (lang:script name, script name, or *)",
1068                      parse_scriptname),
1069         OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
1070                    "generate perf-script.xx script in specified language"),
1071         OPT_STRING('i', "input", &input_name, "file",
1072                     "input file name"),
1073         OPT_BOOLEAN('d', "debug-mode", &debug_mode,
1074                    "do various checks like samples ordering and lost events"),
1075         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1076                    "file", "vmlinux pathname"),
1077         OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1078                    "file", "kallsyms pathname"),
1079         OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
1080                     "When printing symbols do not display call chain"),
1081         OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1082                     "Look for files with symbols relative to this directory"),
1083         OPT_CALLBACK('f', "fields", NULL, "str",
1084                      "comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,addr",
1085                      parse_output_fields),
1086         OPT_STRING('c', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1087         OPT_BOOLEAN('I', "show-info", &show_full_info,
1088                     "display extended information from perf.data file"),
1089         OPT_END()
1090 };
1091
1092 static bool have_cmd(int argc, const char **argv)
1093 {
1094         char **__argv = malloc(sizeof(const char *) * argc);
1095
1096         if (!__argv)
1097                 die("malloc");
1098         memcpy(__argv, argv, sizeof(const char *) * argc);
1099         argc = parse_options(argc, (const char **)__argv, record_options,
1100                              NULL, PARSE_OPT_STOP_AT_NON_OPTION);
1101         free(__argv);
1102
1103         return argc != 0;
1104 }
1105
1106 int cmd_script(int argc, const char **argv, const char *prefix __used)
1107 {
1108         char *rec_script_path = NULL;
1109         char *rep_script_path = NULL;
1110         struct perf_session *session;
1111         char *script_path = NULL;
1112         const char **__argv;
1113         bool system_wide;
1114         int i, j, err;
1115
1116         setup_scripting();
1117
1118         argc = parse_options(argc, argv, options, script_usage,
1119                              PARSE_OPT_STOP_AT_NON_OPTION);
1120
1121         if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
1122                 rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
1123                 if (!rec_script_path)
1124                         return cmd_record(argc, argv, NULL);
1125         }
1126
1127         if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
1128                 rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
1129                 if (!rep_script_path) {
1130                         fprintf(stderr,
1131                                 "Please specify a valid report script"
1132                                 "(see 'perf script -l' for listing)\n");
1133                         return -1;
1134                 }
1135         }
1136
1137         /* make sure PERF_EXEC_PATH is set for scripts */
1138         perf_set_argv_exec_path(perf_exec_path());
1139
1140         if (argc && !script_name && !rec_script_path && !rep_script_path) {
1141                 int live_pipe[2];
1142                 int rep_args;
1143                 pid_t pid;
1144
1145                 rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
1146                 rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
1147
1148                 if (!rec_script_path && !rep_script_path) {
1149                         fprintf(stderr, " Couldn't find script %s\n\n See perf"
1150                                 " script -l for available scripts.\n", argv[0]);
1151                         usage_with_options(script_usage, options);
1152                 }
1153
1154                 if (is_top_script(argv[0])) {
1155                         rep_args = argc - 1;
1156                 } else {
1157                         int rec_args;
1158
1159                         rep_args = has_required_arg(rep_script_path);
1160                         rec_args = (argc - 1) - rep_args;
1161                         if (rec_args < 0) {
1162                                 fprintf(stderr, " %s script requires options."
1163                                         "\n\n See perf script -l for available "
1164                                         "scripts and options.\n", argv[0]);
1165                                 usage_with_options(script_usage, options);
1166                         }
1167                 }
1168
1169                 if (pipe(live_pipe) < 0) {
1170                         perror("failed to create pipe");
1171                         exit(-1);
1172                 }
1173
1174                 pid = fork();
1175                 if (pid < 0) {
1176                         perror("failed to fork");
1177                         exit(-1);
1178                 }
1179
1180                 if (!pid) {
1181                         system_wide = true;
1182                         j = 0;
1183
1184                         dup2(live_pipe[1], 1);
1185                         close(live_pipe[0]);
1186
1187                         if (!is_top_script(argv[0]))
1188                                 system_wide = !have_cmd(argc - rep_args,
1189                                                         &argv[rep_args]);
1190
1191                         __argv = malloc((argc + 6) * sizeof(const char *));
1192                         if (!__argv)
1193                                 die("malloc");
1194
1195                         __argv[j++] = "/bin/sh";
1196                         __argv[j++] = rec_script_path;
1197                         if (system_wide)
1198                                 __argv[j++] = "-a";
1199                         __argv[j++] = "-q";
1200                         __argv[j++] = "-o";
1201                         __argv[j++] = "-";
1202                         for (i = rep_args + 1; i < argc; i++)
1203                                 __argv[j++] = argv[i];
1204                         __argv[j++] = NULL;
1205
1206                         execvp("/bin/sh", (char **)__argv);
1207                         free(__argv);
1208                         exit(-1);
1209                 }
1210
1211                 dup2(live_pipe[0], 0);
1212                 close(live_pipe[1]);
1213
1214                 __argv = malloc((argc + 4) * sizeof(const char *));
1215                 if (!__argv)
1216                         die("malloc");
1217                 j = 0;
1218                 __argv[j++] = "/bin/sh";
1219                 __argv[j++] = rep_script_path;
1220                 for (i = 1; i < rep_args + 1; i++)
1221                         __argv[j++] = argv[i];
1222                 __argv[j++] = "-i";
1223                 __argv[j++] = "-";
1224                 __argv[j++] = NULL;
1225
1226                 execvp("/bin/sh", (char **)__argv);
1227                 free(__argv);
1228                 exit(-1);
1229         }
1230
1231         if (rec_script_path)
1232                 script_path = rec_script_path;
1233         if (rep_script_path)
1234                 script_path = rep_script_path;
1235
1236         if (script_path) {
1237                 system_wide = false;
1238                 j = 0;
1239
1240                 if (rec_script_path)
1241                         system_wide = !have_cmd(argc - 1, &argv[1]);
1242
1243                 __argv = malloc((argc + 2) * sizeof(const char *));
1244                 if (!__argv)
1245                         die("malloc");
1246                 __argv[j++] = "/bin/sh";
1247                 __argv[j++] = script_path;
1248                 if (system_wide)
1249                         __argv[j++] = "-a";
1250                 for (i = 2; i < argc; i++)
1251                         __argv[j++] = argv[i];
1252                 __argv[j++] = NULL;
1253
1254                 execvp("/bin/sh", (char **)__argv);
1255                 free(__argv);
1256                 exit(-1);
1257         }
1258
1259         if (symbol__init() < 0)
1260                 return -1;
1261         if (!script_name)
1262                 setup_pager();
1263
1264         session = perf_session__new(input_name, O_RDONLY, 0, false, &event_ops);
1265         if (session == NULL)
1266                 return -ENOMEM;
1267
1268         if (cpu_list) {
1269                 if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
1270                         return -1;
1271         }
1272
1273         perf_session__fprintf_info(session, stdout, show_full_info);
1274
1275         if (!no_callchain)
1276                 symbol_conf.use_callchain = true;
1277         else
1278                 symbol_conf.use_callchain = false;
1279
1280         if (generate_script_lang) {
1281                 struct stat perf_stat;
1282                 int input;
1283
1284                 if (output_set_by_user()) {
1285                         fprintf(stderr,
1286                                 "custom fields not supported for generated scripts");
1287                         return -1;
1288                 }
1289
1290                 input = open(input_name, O_RDONLY);
1291                 if (input < 0) {
1292                         perror("failed to open file");
1293                         exit(-1);
1294                 }
1295
1296                 err = fstat(input, &perf_stat);
1297                 if (err < 0) {
1298                         perror("failed to stat file");
1299                         exit(-1);
1300                 }
1301
1302                 if (!perf_stat.st_size) {
1303                         fprintf(stderr, "zero-sized file, nothing to do!\n");
1304                         exit(0);
1305                 }
1306
1307                 scripting_ops = script_spec__lookup(generate_script_lang);
1308                 if (!scripting_ops) {
1309                         fprintf(stderr, "invalid language specifier");
1310                         return -1;
1311                 }
1312
1313                 err = scripting_ops->generate_script("perf-script");
1314                 goto out;
1315         }
1316
1317         if (script_name) {
1318                 err = scripting_ops->start_script(script_name, argc, argv);
1319                 if (err)
1320                         goto out;
1321                 pr_debug("perf script started with script %s\n\n", script_name);
1322         }
1323
1324
1325         err = perf_session__check_output_opt(session);
1326         if (err < 0)
1327                 goto out;
1328
1329         err = __cmd_script(session);
1330
1331         perf_session__delete(session);
1332         cleanup_scripting();
1333 out:
1334         return err;
1335 }