linux/tools/perf/builtin-script.c
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   1#include "builtin.h"
   2
   3#include "perf.h"
   4#include "util/cache.h"
   5#include "util/debug.h"
   6#include "util/exec_cmd.h"
   7#include "util/header.h"
   8#include "util/parse-options.h"
   9#include "util/session.h"
  10#include "util/tool.h"
  11#include "util/symbol.h"
  12#include "util/thread.h"
  13#include "util/trace-event.h"
  14#include "util/util.h"
  15#include "util/evlist.h"
  16#include "util/evsel.h"
  17#include "util/sort.h"
  18#include <linux/bitmap.h>
  19
  20static char const               *script_name;
  21static char const               *generate_script_lang;
  22static bool                     debug_mode;
  23static u64                      last_timestamp;
  24static u64                      nr_unordered;
  25extern const struct option      record_options[];
  26static bool                     no_callchain;
  27static bool                     system_wide;
  28static const char               *cpu_list;
  29static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
  30
  31enum perf_output_field {
  32        PERF_OUTPUT_COMM            = 1U << 0,
  33        PERF_OUTPUT_TID             = 1U << 1,
  34        PERF_OUTPUT_PID             = 1U << 2,
  35        PERF_OUTPUT_TIME            = 1U << 3,
  36        PERF_OUTPUT_CPU             = 1U << 4,
  37        PERF_OUTPUT_EVNAME          = 1U << 5,
  38        PERF_OUTPUT_TRACE           = 1U << 6,
  39        PERF_OUTPUT_IP              = 1U << 7,
  40        PERF_OUTPUT_SYM             = 1U << 8,
  41        PERF_OUTPUT_DSO             = 1U << 9,
  42        PERF_OUTPUT_ADDR            = 1U << 10,
  43        PERF_OUTPUT_SYMOFFSET       = 1U << 11,
  44};
  45
  46struct output_option {
  47        const char *str;
  48        enum perf_output_field field;
  49} all_output_options[] = {
  50        {.str = "comm",  .field = PERF_OUTPUT_COMM},
  51        {.str = "tid",   .field = PERF_OUTPUT_TID},
  52        {.str = "pid",   .field = PERF_OUTPUT_PID},
  53        {.str = "time",  .field = PERF_OUTPUT_TIME},
  54        {.str = "cpu",   .field = PERF_OUTPUT_CPU},
  55        {.str = "event", .field = PERF_OUTPUT_EVNAME},
  56        {.str = "trace", .field = PERF_OUTPUT_TRACE},
  57        {.str = "ip",    .field = PERF_OUTPUT_IP},
  58        {.str = "sym",   .field = PERF_OUTPUT_SYM},
  59        {.str = "dso",   .field = PERF_OUTPUT_DSO},
  60        {.str = "addr",  .field = PERF_OUTPUT_ADDR},
  61        {.str = "symoff", .field = PERF_OUTPUT_SYMOFFSET},
  62};
  63
  64/* default set to maintain compatibility with current format */
  65static struct {
  66        bool user_set;
  67        bool wildcard_set;
  68        u64 fields;
  69        u64 invalid_fields;
  70} output[PERF_TYPE_MAX] = {
  71
  72        [PERF_TYPE_HARDWARE] = {
  73                .user_set = false,
  74
  75                .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
  76                              PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
  77                              PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
  78                                  PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
  79
  80                .invalid_fields = PERF_OUTPUT_TRACE,
  81        },
  82
  83        [PERF_TYPE_SOFTWARE] = {
  84                .user_set = false,
  85
  86                .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
  87                              PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
  88                              PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
  89                                  PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
  90
  91                .invalid_fields = PERF_OUTPUT_TRACE,
  92        },
  93
  94        [PERF_TYPE_TRACEPOINT] = {
  95                .user_set = false,
  96
  97                .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
  98                                  PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
  99                                  PERF_OUTPUT_EVNAME | PERF_OUTPUT_TRACE,
 100        },
 101
 102        [PERF_TYPE_RAW] = {
 103                .user_set = false,
 104
 105                .fields = PERF_OUTPUT_COMM | PERF_OUTPUT_TID |
 106                              PERF_OUTPUT_CPU | PERF_OUTPUT_TIME |
 107                              PERF_OUTPUT_EVNAME | PERF_OUTPUT_IP |
 108                                  PERF_OUTPUT_SYM | PERF_OUTPUT_DSO,
 109
 110                .invalid_fields = PERF_OUTPUT_TRACE,
 111        },
 112};
 113
 114static bool output_set_by_user(void)
 115{
 116        int j;
 117        for (j = 0; j < PERF_TYPE_MAX; ++j) {
 118                if (output[j].user_set)
 119                        return true;
 120        }
 121        return false;
 122}
 123
 124static const char *output_field2str(enum perf_output_field field)
 125{
 126        int i, imax = ARRAY_SIZE(all_output_options);
 127        const char *str = "";
 128
 129        for (i = 0; i < imax; ++i) {
 130                if (all_output_options[i].field == field) {
 131                        str = all_output_options[i].str;
 132                        break;
 133                }
 134        }
 135        return str;
 136}
 137
 138#define PRINT_FIELD(x)  (output[attr->type].fields & PERF_OUTPUT_##x)
 139
 140static int perf_evsel__check_stype(struct perf_evsel *evsel,
 141                                   u64 sample_type, const char *sample_msg,
 142                                   enum perf_output_field field)
 143{
 144        struct perf_event_attr *attr = &evsel->attr;
 145        int type = attr->type;
 146        const char *evname;
 147
 148        if (attr->sample_type & sample_type)
 149                return 0;
 150
 151        if (output[type].user_set) {
 152                evname = perf_evsel__name(evsel);
 153                pr_err("Samples for '%s' event do not have %s attribute set. "
 154                       "Cannot print '%s' field.\n",
 155                       evname, sample_msg, output_field2str(field));
 156                return -1;
 157        }
 158
 159        /* user did not ask for it explicitly so remove from the default list */
 160        output[type].fields &= ~field;
 161        evname = perf_evsel__name(evsel);
 162        pr_debug("Samples for '%s' event do not have %s attribute set. "
 163                 "Skipping '%s' field.\n",
 164                 evname, sample_msg, output_field2str(field));
 165
 166        return 0;
 167}
 168
 169static int perf_evsel__check_attr(struct perf_evsel *evsel,
 170                                  struct perf_session *session)
 171{
 172        struct perf_event_attr *attr = &evsel->attr;
 173
 174        if (PRINT_FIELD(TRACE) &&
 175                !perf_session__has_traces(session, "record -R"))
 176                return -EINVAL;
 177
 178        if (PRINT_FIELD(IP)) {
 179                if (perf_evsel__check_stype(evsel, PERF_SAMPLE_IP, "IP",
 180                                            PERF_OUTPUT_IP))
 181                        return -EINVAL;
 182
 183                if (!no_callchain &&
 184                    !(attr->sample_type & PERF_SAMPLE_CALLCHAIN))
 185                        symbol_conf.use_callchain = false;
 186        }
 187
 188        if (PRINT_FIELD(ADDR) &&
 189                perf_evsel__check_stype(evsel, PERF_SAMPLE_ADDR, "ADDR",
 190                                        PERF_OUTPUT_ADDR))
 191                return -EINVAL;
 192
 193        if (PRINT_FIELD(SYM) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
 194                pr_err("Display of symbols requested but neither sample IP nor "
 195                           "sample address\nis selected. Hence, no addresses to convert "
 196                       "to symbols.\n");
 197                return -EINVAL;
 198        }
 199        if (PRINT_FIELD(SYMOFFSET) && !PRINT_FIELD(SYM)) {
 200                pr_err("Display of offsets requested but symbol is not"
 201                       "selected.\n");
 202                return -EINVAL;
 203        }
 204        if (PRINT_FIELD(DSO) && !PRINT_FIELD(IP) && !PRINT_FIELD(ADDR)) {
 205                pr_err("Display of DSO requested but neither sample IP nor "
 206                           "sample address\nis selected. Hence, no addresses to convert "
 207                       "to DSO.\n");
 208                return -EINVAL;
 209        }
 210
 211        if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
 212                perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID",
 213                                        PERF_OUTPUT_TID|PERF_OUTPUT_PID))
 214                return -EINVAL;
 215
 216        if (PRINT_FIELD(TIME) &&
 217                perf_evsel__check_stype(evsel, PERF_SAMPLE_TIME, "TIME",
 218                                        PERF_OUTPUT_TIME))
 219                return -EINVAL;
 220
 221        if (PRINT_FIELD(CPU) &&
 222                perf_evsel__check_stype(evsel, PERF_SAMPLE_CPU, "CPU",
 223                                        PERF_OUTPUT_CPU))
 224                return -EINVAL;
 225
 226        return 0;
 227}
 228
 229/*
 230 * verify all user requested events exist and the samples
 231 * have the expected data
 232 */
 233static int perf_session__check_output_opt(struct perf_session *session)
 234{
 235        int j;
 236        struct perf_evsel *evsel;
 237
 238        for (j = 0; j < PERF_TYPE_MAX; ++j) {
 239                evsel = perf_session__find_first_evtype(session, j);
 240
 241                /*
 242                 * even if fields is set to 0 (ie., show nothing) event must
 243                 * exist if user explicitly includes it on the command line
 244                 */
 245                if (!evsel && output[j].user_set && !output[j].wildcard_set) {
 246                        pr_err("%s events do not exist. "
 247                               "Remove corresponding -f option to proceed.\n",
 248                               event_type(j));
 249                        return -1;
 250                }
 251
 252                if (evsel && output[j].fields &&
 253                        perf_evsel__check_attr(evsel, session))
 254                        return -1;
 255        }
 256
 257        return 0;
 258}
 259
 260static void print_sample_start(struct perf_sample *sample,
 261                               struct thread *thread,
 262                               struct perf_evsel *evsel)
 263{
 264        struct perf_event_attr *attr = &evsel->attr;
 265        const char *evname = NULL;
 266        unsigned long secs;
 267        unsigned long usecs;
 268        unsigned long long nsecs;
 269
 270        if (PRINT_FIELD(COMM)) {
 271                if (latency_format)
 272                        printf("%8.8s ", thread->comm);
 273                else if (PRINT_FIELD(IP) && symbol_conf.use_callchain)
 274                        printf("%s ", thread->comm);
 275                else
 276                        printf("%16s ", thread->comm);
 277        }
 278
 279        if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
 280                printf("%5d/%-5d ", sample->pid, sample->tid);
 281        else if (PRINT_FIELD(PID))
 282                printf("%5d ", sample->pid);
 283        else if (PRINT_FIELD(TID))
 284                printf("%5d ", sample->tid);
 285
 286        if (PRINT_FIELD(CPU)) {
 287                if (latency_format)
 288                        printf("%3d ", sample->cpu);
 289                else
 290                        printf("[%03d] ", sample->cpu);
 291        }
 292
 293        if (PRINT_FIELD(TIME)) {
 294                nsecs = sample->time;
 295                secs = nsecs / NSECS_PER_SEC;
 296                nsecs -= secs * NSECS_PER_SEC;
 297                usecs = nsecs / NSECS_PER_USEC;
 298                printf("%5lu.%06lu: ", secs, usecs);
 299        }
 300
 301        if (PRINT_FIELD(EVNAME)) {
 302                evname = perf_evsel__name(evsel);
 303                printf("%s: ", evname ? evname : "[unknown]");
 304        }
 305}
 306
 307static bool is_bts_event(struct perf_event_attr *attr)
 308{
 309        return ((attr->type == PERF_TYPE_HARDWARE) &&
 310                (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
 311                (attr->sample_period == 1));
 312}
 313
 314static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
 315{
 316        if ((attr->type == PERF_TYPE_SOFTWARE) &&
 317            ((attr->config == PERF_COUNT_SW_PAGE_FAULTS) ||
 318             (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN) ||
 319             (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)))
 320                return true;
 321
 322        if (is_bts_event(attr))
 323                return true;
 324
 325        return false;
 326}
 327
 328static void print_sample_addr(union perf_event *event,
 329                          struct perf_sample *sample,
 330                          struct machine *machine,
 331                          struct thread *thread,
 332                          struct perf_event_attr *attr)
 333{
 334        struct addr_location al;
 335        u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 336
 337        printf("%16" PRIx64, sample->addr);
 338
 339        if (!sample_addr_correlates_sym(attr))
 340                return;
 341
 342        thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
 343                              sample->addr, &al);
 344        if (!al.map)
 345                thread__find_addr_map(thread, machine, cpumode, MAP__VARIABLE,
 346                                      sample->addr, &al);
 347
 348        al.cpu = sample->cpu;
 349        al.sym = NULL;
 350
 351        if (al.map)
 352                al.sym = map__find_symbol(al.map, al.addr, NULL);
 353
 354        if (PRINT_FIELD(SYM)) {
 355                printf(" ");
 356                if (PRINT_FIELD(SYMOFFSET))
 357                        symbol__fprintf_symname_offs(al.sym, &al, stdout);
 358                else
 359                        symbol__fprintf_symname(al.sym, stdout);
 360        }
 361
 362        if (PRINT_FIELD(DSO)) {
 363                printf(" (");
 364                map__fprintf_dsoname(al.map, stdout);
 365                printf(")");
 366        }
 367}
 368
 369static void print_sample_bts(union perf_event *event,
 370                             struct perf_sample *sample,
 371                             struct perf_evsel *evsel,
 372                             struct machine *machine,
 373                             struct thread *thread)
 374{
 375        struct perf_event_attr *attr = &evsel->attr;
 376
 377        /* print branch_from information */
 378        if (PRINT_FIELD(IP)) {
 379                if (!symbol_conf.use_callchain)
 380                        printf(" ");
 381                else
 382                        printf("\n");
 383                perf_evsel__print_ip(evsel, event, sample, machine,
 384                                     PRINT_FIELD(SYM), PRINT_FIELD(DSO),
 385                                     PRINT_FIELD(SYMOFFSET));
 386        }
 387
 388        printf(" => ");
 389
 390        /* print branch_to information */
 391        if (PRINT_FIELD(ADDR))
 392                print_sample_addr(event, sample, machine, thread, attr);
 393
 394        printf("\n");
 395}
 396
 397static void process_event(union perf_event *event, struct perf_sample *sample,
 398                          struct perf_evsel *evsel, struct machine *machine,
 399                          struct addr_location *al)
 400{
 401        struct perf_event_attr *attr = &evsel->attr;
 402        struct thread *thread = al->thread;
 403
 404        if (output[attr->type].fields == 0)
 405                return;
 406
 407        print_sample_start(sample, thread, evsel);
 408
 409        if (is_bts_event(attr)) {
 410                print_sample_bts(event, sample, evsel, machine, thread);
 411                return;
 412        }
 413
 414        if (PRINT_FIELD(TRACE))
 415                event_format__print(evsel->tp_format, sample->cpu,
 416                                    sample->raw_data, sample->raw_size);
 417        if (PRINT_FIELD(ADDR))
 418                print_sample_addr(event, sample, machine, thread, attr);
 419
 420        if (PRINT_FIELD(IP)) {
 421                if (!symbol_conf.use_callchain)
 422                        printf(" ");
 423                else
 424                        printf("\n");
 425                perf_evsel__print_ip(evsel, event, sample, machine,
 426                                     PRINT_FIELD(SYM), PRINT_FIELD(DSO),
 427                                     PRINT_FIELD(SYMOFFSET));
 428        }
 429
 430        printf("\n");
 431}
 432
 433static int default_start_script(const char *script __maybe_unused,
 434                                int argc __maybe_unused,
 435                                const char **argv __maybe_unused)
 436{
 437        return 0;
 438}
 439
 440static int default_stop_script(void)
 441{
 442        return 0;
 443}
 444
 445static int default_generate_script(struct pevent *pevent __maybe_unused,
 446                                   const char *outfile __maybe_unused)
 447{
 448        return 0;
 449}
 450
 451static struct scripting_ops default_scripting_ops = {
 452        .start_script           = default_start_script,
 453        .stop_script            = default_stop_script,
 454        .process_event          = process_event,
 455        .generate_script        = default_generate_script,
 456};
 457
 458static struct scripting_ops     *scripting_ops;
 459
 460static void setup_scripting(void)
 461{
 462        setup_perl_scripting();
 463        setup_python_scripting();
 464
 465        scripting_ops = &default_scripting_ops;
 466}
 467
 468static int cleanup_scripting(void)
 469{
 470        pr_debug("\nperf script stopped\n");
 471
 472        return scripting_ops->stop_script();
 473}
 474
 475static int process_sample_event(struct perf_tool *tool __maybe_unused,
 476                                union perf_event *event,
 477                                struct perf_sample *sample,
 478                                struct perf_evsel *evsel,
 479                                struct machine *machine)
 480{
 481        struct addr_location al;
 482        struct thread *thread = machine__findnew_thread(machine, event->ip.tid);
 483
 484        if (thread == NULL) {
 485                pr_debug("problem processing %d event, skipping it.\n",
 486                         event->header.type);
 487                return -1;
 488        }
 489
 490        if (debug_mode) {
 491                if (sample->time < last_timestamp) {
 492                        pr_err("Samples misordered, previous: %" PRIu64
 493                                " this: %" PRIu64 "\n", last_timestamp,
 494                                sample->time);
 495                        nr_unordered++;
 496                }
 497                last_timestamp = sample->time;
 498                return 0;
 499        }
 500
 501        if (perf_event__preprocess_sample(event, machine, &al, sample, 0) < 0) {
 502                pr_err("problem processing %d event, skipping it.\n",
 503                       event->header.type);
 504                return -1;
 505        }
 506
 507        if (al.filtered)
 508                return 0;
 509
 510        if (cpu_list && !test_bit(sample->cpu, cpu_bitmap))
 511                return 0;
 512
 513        scripting_ops->process_event(event, sample, evsel, machine, &al);
 514
 515        evsel->hists.stats.total_period += sample->period;
 516        return 0;
 517}
 518
 519static struct perf_tool perf_script = {
 520        .sample          = process_sample_event,
 521        .mmap            = perf_event__process_mmap,
 522        .comm            = perf_event__process_comm,
 523        .exit            = perf_event__process_task,
 524        .fork            = perf_event__process_task,
 525        .attr            = perf_event__process_attr,
 526        .event_type      = perf_event__process_event_type,
 527        .tracing_data    = perf_event__process_tracing_data,
 528        .build_id        = perf_event__process_build_id,
 529        .ordered_samples = true,
 530        .ordering_requires_timestamps = true,
 531};
 532
 533extern volatile int session_done;
 534
 535static void sig_handler(int sig __maybe_unused)
 536{
 537        session_done = 1;
 538}
 539
 540static int __cmd_script(struct perf_session *session)
 541{
 542        int ret;
 543
 544        signal(SIGINT, sig_handler);
 545
 546        ret = perf_session__process_events(session, &perf_script);
 547
 548        if (debug_mode)
 549                pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
 550
 551        return ret;
 552}
 553
 554struct script_spec {
 555        struct list_head        node;
 556        struct scripting_ops    *ops;
 557        char                    spec[0];
 558};
 559
 560static LIST_HEAD(script_specs);
 561
 562static struct script_spec *script_spec__new(const char *spec,
 563                                            struct scripting_ops *ops)
 564{
 565        struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
 566
 567        if (s != NULL) {
 568                strcpy(s->spec, spec);
 569                s->ops = ops;
 570        }
 571
 572        return s;
 573}
 574
 575static void script_spec__add(struct script_spec *s)
 576{
 577        list_add_tail(&s->node, &script_specs);
 578}
 579
 580static struct script_spec *script_spec__find(const char *spec)
 581{
 582        struct script_spec *s;
 583
 584        list_for_each_entry(s, &script_specs, node)
 585                if (strcasecmp(s->spec, spec) == 0)
 586                        return s;
 587        return NULL;
 588}
 589
 590static struct script_spec *script_spec__findnew(const char *spec,
 591                                                struct scripting_ops *ops)
 592{
 593        struct script_spec *s = script_spec__find(spec);
 594
 595        if (s)
 596                return s;
 597
 598        s = script_spec__new(spec, ops);
 599        if (!s)
 600                return NULL;
 601
 602        script_spec__add(s);
 603
 604        return s;
 605}
 606
 607int script_spec_register(const char *spec, struct scripting_ops *ops)
 608{
 609        struct script_spec *s;
 610
 611        s = script_spec__find(spec);
 612        if (s)
 613                return -1;
 614
 615        s = script_spec__findnew(spec, ops);
 616        if (!s)
 617                return -1;
 618
 619        return 0;
 620}
 621
 622static struct scripting_ops *script_spec__lookup(const char *spec)
 623{
 624        struct script_spec *s = script_spec__find(spec);
 625        if (!s)
 626                return NULL;
 627
 628        return s->ops;
 629}
 630
 631static void list_available_languages(void)
 632{
 633        struct script_spec *s;
 634
 635        fprintf(stderr, "\n");
 636        fprintf(stderr, "Scripting language extensions (used in "
 637                "perf script -s [spec:]script.[spec]):\n\n");
 638
 639        list_for_each_entry(s, &script_specs, node)
 640                fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
 641
 642        fprintf(stderr, "\n");
 643}
 644
 645static int parse_scriptname(const struct option *opt __maybe_unused,
 646                            const char *str, int unset __maybe_unused)
 647{
 648        char spec[PATH_MAX];
 649        const char *script, *ext;
 650        int len;
 651
 652        if (strcmp(str, "lang") == 0) {
 653                list_available_languages();
 654                exit(0);
 655        }
 656
 657        script = strchr(str, ':');
 658        if (script) {
 659                len = script - str;
 660                if (len >= PATH_MAX) {
 661                        fprintf(stderr, "invalid language specifier");
 662                        return -1;
 663                }
 664                strncpy(spec, str, len);
 665                spec[len] = '\0';
 666                scripting_ops = script_spec__lookup(spec);
 667                if (!scripting_ops) {
 668                        fprintf(stderr, "invalid language specifier");
 669                        return -1;
 670                }
 671                script++;
 672        } else {
 673                script = str;
 674                ext = strrchr(script, '.');
 675                if (!ext) {
 676                        fprintf(stderr, "invalid script extension");
 677                        return -1;
 678                }
 679                scripting_ops = script_spec__lookup(++ext);
 680                if (!scripting_ops) {
 681                        fprintf(stderr, "invalid script extension");
 682                        return -1;
 683                }
 684        }
 685
 686        script_name = strdup(script);
 687
 688        return 0;
 689}
 690
 691static int parse_output_fields(const struct option *opt __maybe_unused,
 692                            const char *arg, int unset __maybe_unused)
 693{
 694        char *tok;
 695        int i, imax = sizeof(all_output_options) / sizeof(struct output_option);
 696        int j;
 697        int rc = 0;
 698        char *str = strdup(arg);
 699        int type = -1;
 700
 701        if (!str)
 702                return -ENOMEM;
 703
 704        /* first word can state for which event type the user is specifying
 705         * the fields. If no type exists, the specified fields apply to all
 706         * event types found in the file minus the invalid fields for a type.
 707         */
 708        tok = strchr(str, ':');
 709        if (tok) {
 710                *tok = '\0';
 711                tok++;
 712                if (!strcmp(str, "hw"))
 713                        type = PERF_TYPE_HARDWARE;
 714                else if (!strcmp(str, "sw"))
 715                        type = PERF_TYPE_SOFTWARE;
 716                else if (!strcmp(str, "trace"))
 717                        type = PERF_TYPE_TRACEPOINT;
 718                else if (!strcmp(str, "raw"))
 719                        type = PERF_TYPE_RAW;
 720                else {
 721                        fprintf(stderr, "Invalid event type in field string.\n");
 722                        rc = -EINVAL;
 723                        goto out;
 724                }
 725
 726                if (output[type].user_set)
 727                        pr_warning("Overriding previous field request for %s events.\n",
 728                                   event_type(type));
 729
 730                output[type].fields = 0;
 731                output[type].user_set = true;
 732                output[type].wildcard_set = false;
 733
 734        } else {
 735                tok = str;
 736                if (strlen(str) == 0) {
 737                        fprintf(stderr,
 738                                "Cannot set fields to 'none' for all event types.\n");
 739                        rc = -EINVAL;
 740                        goto out;
 741                }
 742
 743                if (output_set_by_user())
 744                        pr_warning("Overriding previous field request for all events.\n");
 745
 746                for (j = 0; j < PERF_TYPE_MAX; ++j) {
 747                        output[j].fields = 0;
 748                        output[j].user_set = true;
 749                        output[j].wildcard_set = true;
 750                }
 751        }
 752
 753        tok = strtok(tok, ",");
 754        while (tok) {
 755                for (i = 0; i < imax; ++i) {
 756                        if (strcmp(tok, all_output_options[i].str) == 0)
 757                                break;
 758                }
 759                if (i == imax) {
 760                        fprintf(stderr, "Invalid field requested.\n");
 761                        rc = -EINVAL;
 762                        goto out;
 763                }
 764
 765                if (type == -1) {
 766                        /* add user option to all events types for
 767                         * which it is valid
 768                         */
 769                        for (j = 0; j < PERF_TYPE_MAX; ++j) {
 770                                if (output[j].invalid_fields & all_output_options[i].field) {
 771                                        pr_warning("\'%s\' not valid for %s events. Ignoring.\n",
 772                                                   all_output_options[i].str, event_type(j));
 773                                } else
 774                                        output[j].fields |= all_output_options[i].field;
 775                        }
 776                } else {
 777                        if (output[type].invalid_fields & all_output_options[i].field) {
 778                                fprintf(stderr, "\'%s\' not valid for %s events.\n",
 779                                         all_output_options[i].str, event_type(type));
 780
 781                                rc = -EINVAL;
 782                                goto out;
 783                        }
 784                        output[type].fields |= all_output_options[i].field;
 785                }
 786
 787                tok = strtok(NULL, ",");
 788        }
 789
 790        if (type >= 0) {
 791                if (output[type].fields == 0) {
 792                        pr_debug("No fields requested for %s type. "
 793                                 "Events will not be displayed.\n", event_type(type));
 794                }
 795        }
 796
 797out:
 798        free(str);
 799        return rc;
 800}
 801
 802/* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
 803static int is_directory(const char *base_path, const struct dirent *dent)
 804{
 805        char path[PATH_MAX];
 806        struct stat st;
 807
 808        sprintf(path, "%s/%s", base_path, dent->d_name);
 809        if (stat(path, &st))
 810                return 0;
 811
 812        return S_ISDIR(st.st_mode);
 813}
 814
 815#define for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next)\
 816        while (!readdir_r(scripts_dir, &lang_dirent, &lang_next) &&     \
 817               lang_next)                                               \
 818                if ((lang_dirent.d_type == DT_DIR ||                    \
 819                     (lang_dirent.d_type == DT_UNKNOWN &&               \
 820                      is_directory(scripts_path, &lang_dirent))) &&     \
 821                    (strcmp(lang_dirent.d_name, ".")) &&                \
 822                    (strcmp(lang_dirent.d_name, "..")))
 823
 824#define for_each_script(lang_path, lang_dir, script_dirent, script_next)\
 825        while (!readdir_r(lang_dir, &script_dirent, &script_next) &&    \
 826               script_next)                                             \
 827                if (script_dirent.d_type != DT_DIR &&                   \
 828                    (script_dirent.d_type != DT_UNKNOWN ||              \
 829                     !is_directory(lang_path, &script_dirent)))
 830
 831
 832#define RECORD_SUFFIX                   "-record"
 833#define REPORT_SUFFIX                   "-report"
 834
 835struct script_desc {
 836        struct list_head        node;
 837        char                    *name;
 838        char                    *half_liner;
 839        char                    *args;
 840};
 841
 842static LIST_HEAD(script_descs);
 843
 844static struct script_desc *script_desc__new(const char *name)
 845{
 846        struct script_desc *s = zalloc(sizeof(*s));
 847
 848        if (s != NULL && name)
 849                s->name = strdup(name);
 850
 851        return s;
 852}
 853
 854static void script_desc__delete(struct script_desc *s)
 855{
 856        free(s->name);
 857        free(s->half_liner);
 858        free(s->args);
 859        free(s);
 860}
 861
 862static void script_desc__add(struct script_desc *s)
 863{
 864        list_add_tail(&s->node, &script_descs);
 865}
 866
 867static struct script_desc *script_desc__find(const char *name)
 868{
 869        struct script_desc *s;
 870
 871        list_for_each_entry(s, &script_descs, node)
 872                if (strcasecmp(s->name, name) == 0)
 873                        return s;
 874        return NULL;
 875}
 876
 877static struct script_desc *script_desc__findnew(const char *name)
 878{
 879        struct script_desc *s = script_desc__find(name);
 880
 881        if (s)
 882                return s;
 883
 884        s = script_desc__new(name);
 885        if (!s)
 886                goto out_delete_desc;
 887
 888        script_desc__add(s);
 889
 890        return s;
 891
 892out_delete_desc:
 893        script_desc__delete(s);
 894
 895        return NULL;
 896}
 897
 898static const char *ends_with(const char *str, const char *suffix)
 899{
 900        size_t suffix_len = strlen(suffix);
 901        const char *p = str;
 902
 903        if (strlen(str) > suffix_len) {
 904                p = str + strlen(str) - suffix_len;
 905                if (!strncmp(p, suffix, suffix_len))
 906                        return p;
 907        }
 908
 909        return NULL;
 910}
 911
 912static char *ltrim(char *str)
 913{
 914        int len = strlen(str);
 915
 916        while (len && isspace(*str)) {
 917                len--;
 918                str++;
 919        }
 920
 921        return str;
 922}
 923
 924static int read_script_info(struct script_desc *desc, const char *filename)
 925{
 926        char line[BUFSIZ], *p;
 927        FILE *fp;
 928
 929        fp = fopen(filename, "r");
 930        if (!fp)
 931                return -1;
 932
 933        while (fgets(line, sizeof(line), fp)) {
 934                p = ltrim(line);
 935                if (strlen(p) == 0)
 936                        continue;
 937                if (*p != '#')
 938                        continue;
 939                p++;
 940                if (strlen(p) && *p == '!')
 941                        continue;
 942
 943                p = ltrim(p);
 944                if (strlen(p) && p[strlen(p) - 1] == '\n')
 945                        p[strlen(p) - 1] = '\0';
 946
 947                if (!strncmp(p, "description:", strlen("description:"))) {
 948                        p += strlen("description:");
 949                        desc->half_liner = strdup(ltrim(p));
 950                        continue;
 951                }
 952
 953                if (!strncmp(p, "args:", strlen("args:"))) {
 954                        p += strlen("args:");
 955                        desc->args = strdup(ltrim(p));
 956                        continue;
 957                }
 958        }
 959
 960        fclose(fp);
 961
 962        return 0;
 963}
 964
 965static char *get_script_root(struct dirent *script_dirent, const char *suffix)
 966{
 967        char *script_root, *str;
 968
 969        script_root = strdup(script_dirent->d_name);
 970        if (!script_root)
 971                return NULL;
 972
 973        str = (char *)ends_with(script_root, suffix);
 974        if (!str) {
 975                free(script_root);
 976                return NULL;
 977        }
 978
 979        *str = '\0';
 980        return script_root;
 981}
 982
 983static int list_available_scripts(const struct option *opt __maybe_unused,
 984                                  const char *s __maybe_unused,
 985                                  int unset __maybe_unused)
 986{
 987        struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
 988        char scripts_path[MAXPATHLEN];
 989        DIR *scripts_dir, *lang_dir;
 990        char script_path[MAXPATHLEN];
 991        char lang_path[MAXPATHLEN];
 992        struct script_desc *desc;
 993        char first_half[BUFSIZ];
 994        char *script_root;
 995
 996        snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
 997
 998        scripts_dir = opendir(scripts_path);
 999        if (!scripts_dir)
1000                return -1;
1001
1002        for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1003                snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1004                         lang_dirent.d_name);
1005                lang_dir = opendir(lang_path);
1006                if (!lang_dir)
1007                        continue;
1008
1009                for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1010                        script_root = get_script_root(&script_dirent, REPORT_SUFFIX);
1011                        if (script_root) {
1012                                desc = script_desc__findnew(script_root);
1013                                snprintf(script_path, MAXPATHLEN, "%s/%s",
1014                                         lang_path, script_dirent.d_name);
1015                                read_script_info(desc, script_path);
1016                                free(script_root);
1017                        }
1018                }
1019        }
1020
1021        fprintf(stdout, "List of available trace scripts:\n");
1022        list_for_each_entry(desc, &script_descs, node) {
1023                sprintf(first_half, "%s %s", desc->name,
1024                        desc->args ? desc->args : "");
1025                fprintf(stdout, "  %-36s %s\n", first_half,
1026                        desc->half_liner ? desc->half_liner : "");
1027        }
1028
1029        exit(0);
1030}
1031
1032/*
1033 * Return -1 if none is found, otherwise the actual scripts number.
1034 *
1035 * Currently the only user of this function is the script browser, which
1036 * will list all statically runnable scripts, select one, execute it and
1037 * show the output in a perf browser.
1038 */
1039int find_scripts(char **scripts_array, char **scripts_path_array)
1040{
1041        struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
1042        char scripts_path[MAXPATHLEN];
1043        DIR *scripts_dir, *lang_dir;
1044        char lang_path[MAXPATHLEN];
1045        char *temp;
1046        int i = 0;
1047
1048        snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1049
1050        scripts_dir = opendir(scripts_path);
1051        if (!scripts_dir)
1052                return -1;
1053
1054        for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1055                snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
1056                         lang_dirent.d_name);
1057#ifdef NO_LIBPERL
1058                if (strstr(lang_path, "perl"))
1059                        continue;
1060#endif
1061#ifdef NO_LIBPYTHON
1062                if (strstr(lang_path, "python"))
1063                        continue;
1064#endif
1065
1066                lang_dir = opendir(lang_path);
1067                if (!lang_dir)
1068                        continue;
1069
1070                for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1071                        /* Skip those real time scripts: xxxtop.p[yl] */
1072                        if (strstr(script_dirent.d_name, "top."))
1073                                continue;
1074                        sprintf(scripts_path_array[i], "%s/%s", lang_path,
1075                                script_dirent.d_name);
1076                        temp = strchr(script_dirent.d_name, '.');
1077                        snprintf(scripts_array[i],
1078                                (temp - script_dirent.d_name) + 1,
1079                                "%s", script_dirent.d_name);
1080                        i++;
1081                }
1082        }
1083
1084        return i;
1085}
1086
1087static char *get_script_path(const char *script_root, const char *suffix)
1088{
1089        struct dirent *script_next, *lang_next, script_dirent, lang_dirent;
1090        char scripts_path[MAXPATHLEN];
1091        char script_path[MAXPATHLEN];
1092        DIR *scripts_dir, *lang_dir;
1093        char lang_path[MAXPATHLEN];
1094        char *__script_root;
1095
1096        snprintf(scripts_path, MAXPATHLEN, "%s/scripts", perf_exec_path());
1097
1098        scripts_dir = opendir(scripts_path);
1099        if (!scripts_dir)
1100                return NULL;
1101
1102        for_each_lang(scripts_path, scripts_dir, lang_dirent, lang_next) {
1103                snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
1104                         lang_dirent.d_name);
1105                lang_dir = opendir(lang_path);
1106                if (!lang_dir)
1107                        continue;
1108
1109                for_each_script(lang_path, lang_dir, script_dirent, script_next) {
1110                        __script_root = get_script_root(&script_dirent, suffix);
1111                        if (__script_root && !strcmp(script_root, __script_root)) {
1112                                free(__script_root);
1113                                closedir(lang_dir);
1114                                closedir(scripts_dir);
1115                                snprintf(script_path, MAXPATHLEN, "%s/%s",
1116                                         lang_path, script_dirent.d_name);
1117                                return strdup(script_path);
1118                        }
1119                        free(__script_root);
1120                }
1121                closedir(lang_dir);
1122        }
1123        closedir(scripts_dir);
1124
1125        return NULL;
1126}
1127
1128static bool is_top_script(const char *script_path)
1129{
1130        return ends_with(script_path, "top") == NULL ? false : true;
1131}
1132
1133static int has_required_arg(char *script_path)
1134{
1135        struct script_desc *desc;
1136        int n_args = 0;
1137        char *p;
1138
1139        desc = script_desc__new(NULL);
1140
1141        if (read_script_info(desc, script_path))
1142                goto out;
1143
1144        if (!desc->args)
1145                goto out;
1146
1147        for (p = desc->args; *p; p++)
1148                if (*p == '<')
1149                        n_args++;
1150out:
1151        script_desc__delete(desc);
1152
1153        return n_args;
1154}
1155
1156static int have_cmd(int argc, const char **argv)
1157{
1158        char **__argv = malloc(sizeof(const char *) * argc);
1159
1160        if (!__argv) {
1161                pr_err("malloc failed\n");
1162                return -1;
1163        }
1164
1165        memcpy(__argv, argv, sizeof(const char *) * argc);
1166        argc = parse_options(argc, (const char **)__argv, record_options,
1167                             NULL, PARSE_OPT_STOP_AT_NON_OPTION);
1168        free(__argv);
1169
1170        system_wide = (argc == 0);
1171
1172        return 0;
1173}
1174
1175int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
1176{
1177        bool show_full_info = false;
1178        const char *input_name = NULL;
1179        char *rec_script_path = NULL;
1180        char *rep_script_path = NULL;
1181        struct perf_session *session;
1182        char *script_path = NULL;
1183        const char **__argv;
1184        int i, j, err;
1185        const struct option options[] = {
1186        OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1187                    "dump raw trace in ASCII"),
1188        OPT_INCR('v', "verbose", &verbose,
1189                 "be more verbose (show symbol address, etc)"),
1190        OPT_BOOLEAN('L', "Latency", &latency_format,
1191                    "show latency attributes (irqs/preemption disabled, etc)"),
1192        OPT_CALLBACK_NOOPT('l', "list", NULL, NULL, "list available scripts",
1193                           list_available_scripts),
1194        OPT_CALLBACK('s', "script", NULL, "name",
1195                     "script file name (lang:script name, script name, or *)",
1196                     parse_scriptname),
1197        OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
1198                   "generate perf-script.xx script in specified language"),
1199        OPT_STRING('i', "input", &input_name, "file", "input file name"),
1200        OPT_BOOLEAN('d', "debug-mode", &debug_mode,
1201                   "do various checks like samples ordering and lost events"),
1202        OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1203                   "file", "vmlinux pathname"),
1204        OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1205                   "file", "kallsyms pathname"),
1206        OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
1207                    "When printing symbols do not display call chain"),
1208        OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
1209                    "Look for files with symbols relative to this directory"),
1210        OPT_CALLBACK('f', "fields", NULL, "str",
1211                     "comma separated output fields prepend with 'type:'. "
1212                     "Valid types: hw,sw,trace,raw. "
1213                     "Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
1214                     "addr,symoff", parse_output_fields),
1215        OPT_BOOLEAN('a', "all-cpus", &system_wide,
1216                    "system-wide collection from all CPUs"),
1217        OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1218                   "only consider these symbols"),
1219        OPT_STRING('C', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
1220        OPT_STRING('c', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1221                   "only display events for these comms"),
1222        OPT_BOOLEAN('I', "show-info", &show_full_info,
1223                    "display extended information from perf.data file"),
1224        OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path,
1225                    "Show the path of [kernel.kallsyms]"),
1226        OPT_END()
1227        };
1228        const char * const script_usage[] = {
1229                "perf script [<options>]",
1230                "perf script [<options>] record <script> [<record-options>] <command>",
1231                "perf script [<options>] report <script> [script-args]",
1232                "perf script [<options>] <script> [<record-options>] <command>",
1233                "perf script [<options>] <top-script> [script-args]",
1234                NULL
1235        };
1236
1237        setup_scripting();
1238
1239        argc = parse_options(argc, argv, options, script_usage,
1240                             PARSE_OPT_STOP_AT_NON_OPTION);
1241
1242        if (argc > 1 && !strncmp(argv[0], "rec", strlen("rec"))) {
1243                rec_script_path = get_script_path(argv[1], RECORD_SUFFIX);
1244                if (!rec_script_path)
1245                        return cmd_record(argc, argv, NULL);
1246        }
1247
1248        if (argc > 1 && !strncmp(argv[0], "rep", strlen("rep"))) {
1249                rep_script_path = get_script_path(argv[1], REPORT_SUFFIX);
1250                if (!rep_script_path) {
1251                        fprintf(stderr,
1252                                "Please specify a valid report script"
1253                                "(see 'perf script -l' for listing)\n");
1254                        return -1;
1255                }
1256        }
1257
1258        /* make sure PERF_EXEC_PATH is set for scripts */
1259        perf_set_argv_exec_path(perf_exec_path());
1260
1261        if (argc && !script_name && !rec_script_path && !rep_script_path) {
1262                int live_pipe[2];
1263                int rep_args;
1264                pid_t pid;
1265
1266                rec_script_path = get_script_path(argv[0], RECORD_SUFFIX);
1267                rep_script_path = get_script_path(argv[0], REPORT_SUFFIX);
1268
1269                if (!rec_script_path && !rep_script_path) {
1270                        fprintf(stderr, " Couldn't find script %s\n\n See perf"
1271                                " script -l for available scripts.\n", argv[0]);
1272                        usage_with_options(script_usage, options);
1273                }
1274
1275                if (is_top_script(argv[0])) {
1276                        rep_args = argc - 1;
1277                } else {
1278                        int rec_args;
1279
1280                        rep_args = has_required_arg(rep_script_path);
1281                        rec_args = (argc - 1) - rep_args;
1282                        if (rec_args < 0) {
1283                                fprintf(stderr, " %s script requires options."
1284                                        "\n\n See perf script -l for available "
1285                                        "scripts and options.\n", argv[0]);
1286                                usage_with_options(script_usage, options);
1287                        }
1288                }
1289
1290                if (pipe(live_pipe) < 0) {
1291                        perror("failed to create pipe");
1292                        return -1;
1293                }
1294
1295                pid = fork();
1296                if (pid < 0) {
1297                        perror("failed to fork");
1298                        return -1;
1299                }
1300
1301                if (!pid) {
1302                        j = 0;
1303
1304                        dup2(live_pipe[1], 1);
1305                        close(live_pipe[0]);
1306
1307                        if (is_top_script(argv[0])) {
1308                                system_wide = true;
1309                        } else if (!system_wide) {
1310                                if (have_cmd(argc - rep_args, &argv[rep_args]) != 0) {
1311                                        err = -1;
1312                                        goto out;
1313                                }
1314                        }
1315
1316                        __argv = malloc((argc + 6) * sizeof(const char *));
1317                        if (!__argv) {
1318                                pr_err("malloc failed\n");
1319                                err = -ENOMEM;
1320                                goto out;
1321                        }
1322
1323                        __argv[j++] = "/bin/sh";
1324                        __argv[j++] = rec_script_path;
1325                        if (system_wide)
1326                                __argv[j++] = "-a";
1327                        __argv[j++] = "-q";
1328                        __argv[j++] = "-o";
1329                        __argv[j++] = "-";
1330                        for (i = rep_args + 1; i < argc; i++)
1331                                __argv[j++] = argv[i];
1332                        __argv[j++] = NULL;
1333
1334                        execvp("/bin/sh", (char **)__argv);
1335                        free(__argv);
1336                        exit(-1);
1337                }
1338
1339                dup2(live_pipe[0], 0);
1340                close(live_pipe[1]);
1341
1342                __argv = malloc((argc + 4) * sizeof(const char *));
1343                if (!__argv) {
1344                        pr_err("malloc failed\n");
1345                        err = -ENOMEM;
1346                        goto out;
1347                }
1348
1349                j = 0;
1350                __argv[j++] = "/bin/sh";
1351                __argv[j++] = rep_script_path;
1352                for (i = 1; i < rep_args + 1; i++)
1353                        __argv[j++] = argv[i];
1354                __argv[j++] = "-i";
1355                __argv[j++] = "-";
1356                __argv[j++] = NULL;
1357
1358                execvp("/bin/sh", (char **)__argv);
1359                free(__argv);
1360                exit(-1);
1361        }
1362
1363        if (rec_script_path)
1364                script_path = rec_script_path;
1365        if (rep_script_path)
1366                script_path = rep_script_path;
1367
1368        if (script_path) {
1369                j = 0;
1370
1371                if (!rec_script_path)
1372                        system_wide = false;
1373                else if (!system_wide) {
1374                        if (have_cmd(argc - 1, &argv[1]) != 0) {
1375                                err = -1;
1376                                goto out;
1377                        }
1378                }
1379
1380                __argv = malloc((argc + 2) * sizeof(const char *));
1381                if (!__argv) {
1382                        pr_err("malloc failed\n");
1383                        err = -ENOMEM;
1384                        goto out;
1385                }
1386
1387                __argv[j++] = "/bin/sh";
1388                __argv[j++] = script_path;
1389                if (system_wide)
1390                        __argv[j++] = "-a";
1391                for (i = 2; i < argc; i++)
1392                        __argv[j++] = argv[i];
1393                __argv[j++] = NULL;
1394
1395                execvp("/bin/sh", (char **)__argv);
1396                free(__argv);
1397                exit(-1);
1398        }
1399
1400        if (symbol__init() < 0)
1401                return -1;
1402        if (!script_name)
1403                setup_pager();
1404
1405        session = perf_session__new(input_name, O_RDONLY, 0, false,
1406                                    &perf_script);
1407        if (session == NULL)
1408                return -ENOMEM;
1409
1410        if (cpu_list) {
1411                if (perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap))
1412                        return -1;
1413        }
1414
1415        perf_session__fprintf_info(session, stdout, show_full_info);
1416
1417        if (!no_callchain)
1418                symbol_conf.use_callchain = true;
1419        else
1420                symbol_conf.use_callchain = false;
1421
1422        if (generate_script_lang) {
1423                struct stat perf_stat;
1424                int input;
1425
1426                if (output_set_by_user()) {
1427                        fprintf(stderr,
1428                                "custom fields not supported for generated scripts");
1429                        return -1;
1430                }
1431
1432                input = open(session->filename, O_RDONLY);      /* input_name */
1433                if (input < 0) {
1434                        perror("failed to open file");
1435                        return -1;
1436                }
1437
1438                err = fstat(input, &perf_stat);
1439                if (err < 0) {
1440                        perror("failed to stat file");
1441                        return -1;
1442                }
1443
1444                if (!perf_stat.st_size) {
1445                        fprintf(stderr, "zero-sized file, nothing to do!\n");
1446                        return 0;
1447                }
1448
1449                scripting_ops = script_spec__lookup(generate_script_lang);
1450                if (!scripting_ops) {
1451                        fprintf(stderr, "invalid language specifier");
1452                        return -1;
1453                }
1454
1455                err = scripting_ops->generate_script(session->pevent,
1456                                                     "perf-script");
1457                goto out;
1458        }
1459
1460        if (script_name) {
1461                err = scripting_ops->start_script(script_name, argc, argv);
1462                if (err)
1463                        goto out;
1464                pr_debug("perf script started with script %s\n\n", script_name);
1465        }
1466
1467
1468        err = perf_session__check_output_opt(session);
1469        if (err < 0)
1470                goto out;
1471
1472        err = __cmd_script(session);
1473
1474        perf_session__delete(session);
1475        cleanup_scripting();
1476out:
1477        return err;
1478}
1479
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