tools/perf/builtin-inject.c

   1 /*
   2  * builtin-inject.c
   3  *
   4  * Builtin inject command: Examine the live mode (stdin) event stream
   5  * and repipe it to stdout while optionally injecting additional
   6  * events into it.
   7  */
   8 #include "builtin.h"
   9
  10 #include "perf.h"
  11 #include "util/color.h"
  12 #include "util/evlist.h"
  13 #include "util/evsel.h"
  14 #include "util/session.h"
  15 #include "util/tool.h"
  16 #include "util/debug.h"
  17 #include "util/build-id.h"
  18 #include "util/data.h"
  19 #include "util/auxtrace.h"
  20 #include "util/jit.h"
  21 #include "util/thread.h"
  22
  23 #include <subcmd/parse-options.h>
  24
  25 #include <linux/list.h>
  26 #include <errno.h>
  27 #include <signal.h>
  28
  29 struct perf_inject {
  30         struct perf_tool        tool;
  31         struct perf_session     *session;
  32         bool                    build_ids;
  33         bool                    sched_stat;
  34         bool                    have_auxtrace;
  35         bool                    strip;
  36         bool                    jit_mode;
  37         const char              *input_name;
  38         struct perf_data_file   output;
  39         u64                     bytes_written;
  40         u64                     aux_id;
  41         struct list_head        samples;
  42         struct itrace_synth_opts itrace_synth_opts;
  43 };
  44
  45 struct event_entry {
  46         struct list_head node;
  47         u32              tid;
  48         union perf_event event[0];
  49 };
  50
  51 static int output_bytes(struct perf_inject *inject, void *buf, size_t sz)
  52 {
  53         ssize_t size;
  54
  55         size = perf_data_file__write(&inject->output, buf, sz);
  56         if (size < 0)
  57                 return -errno;
  58
  59         inject->bytes_written += size;
  60         return 0;
  61 }
  62
  63 static int perf_event__repipe_synth(struct perf_tool *tool,
  64                                     union perf_event *event)
  65 {
  66         struct perf_inject *inject = container_of(tool, struct perf_inject,
  67                                                   tool);
  68
  69         return output_bytes(inject, event, event->header.size);
  70 }
  71
  72 static int perf_event__repipe_oe_synth(struct perf_tool *tool,
  73                                        union perf_event *event,
  74                                        struct ordered_events *oe __maybe_unused)
  75 {
  76         return perf_event__repipe_synth(tool, event);
  77 }
  78
  79 #ifdef HAVE_JITDUMP
  80 static int perf_event__drop_oe(struct perf_tool *tool __maybe_unused,
  81                                union perf_event *event __maybe_unused,
  82                                struct ordered_events *oe __maybe_unused)
  83 {
  84         return 0;
  85 }
  86 #endif
  87
  88 static int perf_event__repipe_op2_synth(struct perf_tool *tool,
  89                                         union perf_event *event,
  90                                         struct perf_session *session
  91                                         __maybe_unused)
  92 {
  93         return perf_event__repipe_synth(tool, event);
  94 }
  95
  96 static int perf_event__repipe_attr(struct perf_tool *tool,
  97                                    union perf_event *event,
  98                                    struct perf_evlist **pevlist)
  99 {
 100         struct perf_inject *inject = container_of(tool, struct perf_inject,
 101                                                   tool);
 102         int ret;
 103
 104         ret = perf_event__process_attr(tool, event, pevlist);
 105         if (ret)
 106                 return ret;
 107
 108         if (!inject->output.is_pipe)
 109                 return 0;
 110
 111         return perf_event__repipe_synth(tool, event);
 112 }
 113
 114 #ifdef HAVE_AUXTRACE_SUPPORT
 115
 116 static int copy_bytes(struct perf_inject *inject, int fd, off_t size)
 117 {
 118         char buf[4096];
 119         ssize_t ssz;
 120         int ret;
 121
 122         while (size > 0) {
 123                 ssz = read(fd, buf, min(size, (off_t)sizeof(buf)));
 124                 if (ssz < 0)
 125                         return -errno;
 126                 ret = output_bytes(inject, buf, ssz);
 127                 if (ret)
 128                         return ret;
 129                 size -= ssz;
 130         }
 131
 132         return 0;
 133 }
 134
 135 static s64 perf_event__repipe_auxtrace(struct perf_tool *tool,
 136                                        union perf_event *event,
 137                                        struct perf_session *session)
 138 {
 139         struct perf_inject *inject = container_of(tool, struct perf_inject,
 140                                                   tool);
 141         int ret;
 142
 143         inject->have_auxtrace = true;
 144
 145         if (!inject->output.is_pipe) {
 146                 off_t offset;
 147
 148                 offset = lseek(inject->output.fd, 0, SEEK_CUR);
 149                 if (offset == -1)
 150                         return -errno;
 151                 ret = auxtrace_index__auxtrace_event(&session->auxtrace_index,
 152                                                      event, offset);
 153                 if (ret < 0)
 154                         return ret;
 155         }
 156
 157         if (perf_data_file__is_pipe(session->file) || !session->one_mmap) {
 158                 ret = output_bytes(inject, event, event->header.size);
 159                 if (ret < 0)
 160                         return ret;
 161                 ret = copy_bytes(inject, perf_data_file__fd(session->file),
 162                                  event->auxtrace.size);
 163         } else {
 164                 ret = output_bytes(inject, event,
 165                                    event->header.size + event->auxtrace.size);
 166         }
 167         if (ret < 0)
 168                 return ret;
 169
 170         return event->auxtrace.size;
 171 }
 172
 173 #else
 174
 175 static s64
 176 perf_event__repipe_auxtrace(struct perf_tool *tool __maybe_unused,
 177                             union perf_event *event __maybe_unused,
 178                             struct perf_session *session __maybe_unused)
 179 {
 180         pr_err("AUX area tracing not supported\n");
 181         return -EINVAL;
 182 }
 183
 184 #endif
 185
 186 static int perf_event__repipe(struct perf_tool *tool,
 187                               union perf_event *event,
 188                               struct perf_sample *sample __maybe_unused,
 189                               struct machine *machine __maybe_unused)
 190 {
 191         return perf_event__repipe_synth(tool, event);
 192 }
 193
 194 static int perf_event__drop(struct perf_tool *tool __maybe_unused,
 195                             union perf_event *event __maybe_unused,
 196                             struct perf_sample *sample __maybe_unused,
 197                             struct machine *machine __maybe_unused)
 198 {
 199         return 0;
 200 }
 201
 202 static int perf_event__drop_aux(struct perf_tool *tool,
 203                                 union perf_event *event __maybe_unused,
 204                                 struct perf_sample *sample,
 205                                 struct machine *machine __maybe_unused)
 206 {
 207         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 208
 209         if (!inject->aux_id)
 210                 inject->aux_id = sample->id;
 211
 212         return 0;
 213 }
 214
 215 typedef int (*inject_handler)(struct perf_tool *tool,
 216                               union perf_event *event,
 217                               struct perf_sample *sample,
 218                               struct perf_evsel *evsel,
 219                               struct machine *machine);
 220
 221 static int perf_event__repipe_sample(struct perf_tool *tool,
 222                                      union perf_event *event,
 223                                      struct perf_sample *sample,
 224                                      struct perf_evsel *evsel,
 225                                      struct machine *machine)
 226 {
 227         if (evsel->handler) {
 228                 inject_handler f = evsel->handler;
 229                 return f(tool, event, sample, evsel, machine);
 230         }
 231
 232         build_id__mark_dso_hit(tool, event, sample, evsel, machine);
 233
 234         return perf_event__repipe_synth(tool, event);
 235 }
 236
 237 static int perf_event__repipe_mmap(struct perf_tool *tool,
 238                                    union perf_event *event,
 239                                    struct perf_sample *sample,
 240                                    struct machine *machine)
 241 {
 242         int err;
 243
 244         err = perf_event__process_mmap(tool, event, sample, machine);
 245         perf_event__repipe(tool, event, sample, machine);
 246
 247         return err;
 248 }
 249
 250 #ifdef HAVE_JITDUMP
 251 static int perf_event__jit_repipe_mmap(struct perf_tool *tool,
 252                                        union perf_event *event,
 253                                        struct perf_sample *sample,
 254                                        struct machine *machine)
 255 {
 256         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 257         u64 n = 0;
 258         int ret;
 259
 260         /*
 261          * if jit marker, then inject jit mmaps and generate ELF images
 262          */
 263         ret = jit_process(inject->session, &inject->output, machine,
 264                           event->mmap.filename, sample->pid, &n);
 265         if (ret < 0)
 266                 return ret;
 267         if (ret) {
 268                 inject->bytes_written += n;
 269                 return 0;
 270         }
 271         return perf_event__repipe_mmap(tool, event, sample, machine);
 272 }
 273 #endif
 274
 275 static int perf_event__repipe_mmap2(struct perf_tool *tool,
 276                                    union perf_event *event,
 277                                    struct perf_sample *sample,
 278                                    struct machine *machine)
 279 {
 280         int err;
 281
 282         err = perf_event__process_mmap2(tool, event, sample, machine);
 283         perf_event__repipe(tool, event, sample, machine);
 284
 285         return err;
 286 }
 287
 288 #ifdef HAVE_JITDUMP
 289 static int perf_event__jit_repipe_mmap2(struct perf_tool *tool,
 290                                         union perf_event *event,
 291                                         struct perf_sample *sample,
 292                                         struct machine *machine)
 293 {
 294         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 295         u64 n = 0;
 296         int ret;
 297
 298         /*
 299          * if jit marker, then inject jit mmaps and generate ELF images
 300          */
 301         ret = jit_process(inject->session, &inject->output, machine,
 302                           event->mmap2.filename, sample->pid, &n);
 303         if (ret < 0)
 304                 return ret;
 305         if (ret) {
 306                 inject->bytes_written += n;
 307                 return 0;
 308         }
 309         return perf_event__repipe_mmap2(tool, event, sample, machine);
 310 }
 311 #endif
 312
 313 static int perf_event__repipe_fork(struct perf_tool *tool,
 314                                    union perf_event *event,
 315                                    struct perf_sample *sample,
 316                                    struct machine *machine)
 317 {
 318         int err;
 319
 320         err = perf_event__process_fork(tool, event, sample, machine);
 321         perf_event__repipe(tool, event, sample, machine);
 322
 323         return err;
 324 }
 325
 326 static int perf_event__repipe_comm(struct perf_tool *tool,
 327                                    union perf_event *event,
 328                                    struct perf_sample *sample,
 329                                    struct machine *machine)
 330 {
 331         int err;
 332
 333         err = perf_event__process_comm(tool, event, sample, machine);
 334         perf_event__repipe(tool, event, sample, machine);
 335
 336         return err;
 337 }
 338
 339 static int perf_event__repipe_namespaces(struct perf_tool *tool,
 340                                          union perf_event *event,
 341                                          struct perf_sample *sample,
 342                                          struct machine *machine)
 343 {
 344         int err = perf_event__process_namespaces(tool, event, sample, machine);
 345
 346         perf_event__repipe(tool, event, sample, machine);
 347
 348         return err;
 349 }
 350
 351 static int perf_event__repipe_exit(struct perf_tool *tool,
 352                                    union perf_event *event,
 353                                    struct perf_sample *sample,
 354                                    struct machine *machine)
 355 {
 356         int err;
 357
 358         err = perf_event__process_exit(tool, event, sample, machine);
 359         perf_event__repipe(tool, event, sample, machine);
 360
 361         return err;
 362 }
 363
 364 static int perf_event__repipe_tracing_data(struct perf_tool *tool,
 365                                            union perf_event *event,
 366                                            struct perf_session *session)
 367 {
 368         int err;
 369
 370         perf_event__repipe_synth(tool, event);
 371         err = perf_event__process_tracing_data(tool, event, session);
 372
 373         return err;
 374 }
 375
 376 static int perf_event__repipe_id_index(struct perf_tool *tool,
 377                                        union perf_event *event,
 378                                        struct perf_session *session)
 379 {
 380         int err;
 381
 382         perf_event__repipe_synth(tool, event);
 383         err = perf_event__process_id_index(tool, event, session);
 384
 385         return err;
 386 }
 387
 388 static int dso__read_build_id(struct dso *dso)
 389 {
 390         if (dso->has_build_id)
 391                 return 0;
 392
 393         if (filename__read_build_id(dso->long_name, dso->build_id,
 394                                     sizeof(dso->build_id)) > 0) {
 395                 dso->has_build_id = true;
 396                 return 0;
 397         }
 398
 399         return -1;
 400 }
 401
 402 static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
 403                                 struct machine *machine)
 404 {
 405         u16 misc = PERF_RECORD_MISC_USER;
 406         int err;
 407
 408         if (dso__read_build_id(dso) < 0) {
 409                 pr_debug("no build_id found for %s\n", dso->long_name);
 410                 return -1;
 411         }
 412
 413         if (dso->kernel)
 414                 misc = PERF_RECORD_MISC_KERNEL;
 415
 416         err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
 417                                               machine);
 418         if (err) {
 419                 pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
 420                 return -1;
 421         }
 422
 423         return 0;
 424 }
 425
 426 static int perf_event__inject_buildid(struct perf_tool *tool,
 427                                       union perf_event *event,
 428                                       struct perf_sample *sample,
 429                                       struct perf_evsel *evsel __maybe_unused,
 430                                       struct machine *machine)
 431 {
 432         struct addr_location al;
 433         struct thread *thread;
 434
 435         thread = machine__findnew_thread(machine, sample->pid, sample->tid);
 436         if (thread == NULL) {
 437                 pr_err("problem processing %d event, skipping it.\n",
 438                        event->header.type);
 439                 goto repipe;
 440         }
 441
 442         thread__find_addr_map(thread, sample->cpumode, MAP__FUNCTION, sample->ip, &al);
 443
 444         if (al.map != NULL) {
 445                 if (!al.map->dso->hit) {
 446                         al.map->dso->hit = 1;
 447                         if (map__load(al.map) >= 0) {
 448                                 dso__inject_build_id(al.map->dso, tool, machine);
 449                                 /*
 450                                  * If this fails, too bad, let the other side
 451                                  * account this as unresolved.
 452                                  */
 453                         } else {
 454 #ifdef HAVE_LIBELF_SUPPORT
 455                                 pr_warning("no symbols found in %s, maybe "
 456                                            "install a debug package?\n",
 457                                            al.map->dso->long_name);
 458 #endif
 459                         }
 460                 }
 461         }
 462
 463         thread__put(thread);
 464 repipe:
 465         perf_event__repipe(tool, event, sample, machine);
 466         return 0;
 467 }
 468
 469 static int perf_inject__sched_process_exit(struct perf_tool *tool,
 470                                            union perf_event *event __maybe_unused,
 471                                            struct perf_sample *sample,
 472                                            struct perf_evsel *evsel __maybe_unused,
 473                                            struct machine *machine __maybe_unused)
 474 {
 475         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 476         struct event_entry *ent;
 477
 478         list_for_each_entry(ent, &inject->samples, node) {
 479                 if (sample->tid == ent->tid) {
 480                         list_del_init(&ent->node);
 481                         free(ent);
 482                         break;
 483                 }
 484         }
 485
 486         return 0;
 487 }
 488
 489 static int perf_inject__sched_switch(struct perf_tool *tool,
 490                                      union perf_event *event,
 491                                      struct perf_sample *sample,
 492                                      struct perf_evsel *evsel,
 493                                      struct machine *machine)
 494 {
 495         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 496         struct event_entry *ent;
 497
 498         perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
 499
 500         ent = malloc(event->header.size + sizeof(struct event_entry));
 501         if (ent == NULL) {
 502                 color_fprintf(stderr, PERF_COLOR_RED,
 503                              "Not enough memory to process sched switch event!");
 504                 return -1;
 505         }
 506
 507         ent->tid = sample->tid;
 508         memcpy(&ent->event, event, event->header.size);
 509         list_add(&ent->node, &inject->samples);
 510         return 0;
 511 }
 512
 513 static int perf_inject__sched_stat(struct perf_tool *tool,
 514                                    union perf_event *event __maybe_unused,
 515                                    struct perf_sample *sample,
 516                                    struct perf_evsel *evsel,
 517                                    struct machine *machine)
 518 {
 519         struct event_entry *ent;
 520         union perf_event *event_sw;
 521         struct perf_sample sample_sw;
 522         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 523         u32 pid = perf_evsel__intval(evsel, sample, "pid");
 524
 525         list_for_each_entry(ent, &inject->samples, node) {
 526                 if (pid == ent->tid)
 527                         goto found;
 528         }
 529
 530         return 0;
 531 found:
 532         event_sw = &ent->event[0];
 533         perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
 534
 535         sample_sw.period = sample->period;
 536         sample_sw.time   = sample->time;
 537         perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
 538                                       evsel->attr.read_format, &sample_sw,
 539                                       false);
 540         build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
 541         return perf_event__repipe(tool, event_sw, &sample_sw, machine);
 542 }
 543
 544 static void sig_handler(int sig __maybe_unused)
 545 {
 546         session_done = 1;
 547 }
 548
 549 static int perf_evsel__check_stype(struct perf_evsel *evsel,
 550                                    u64 sample_type, const char *sample_msg)
 551 {
 552         struct perf_event_attr *attr = &evsel->attr;
 553         const char *name = perf_evsel__name(evsel);
 554
 555         if (!(attr->sample_type & sample_type)) {
 556                 pr_err("Samples for %s event do not have %s attribute set.",
 557                         name, sample_msg);
 558                 return -EINVAL;
 559         }
 560
 561         return 0;
 562 }
 563
 564 static int drop_sample(struct perf_tool *tool __maybe_unused,
 565                        union perf_event *event __maybe_unused,
 566                        struct perf_sample *sample __maybe_unused,
 567                        struct perf_evsel *evsel __maybe_unused,
 568                        struct machine *machine __maybe_unused)
 569 {
 570         return 0;
 571 }
 572
 573 static void strip_init(struct perf_inject *inject)
 574 {
 575         struct perf_evlist *evlist = inject->session->evlist;
 576         struct perf_evsel *evsel;
 577
 578         inject->tool.context_switch = perf_event__drop;
 579
 580         evlist__for_each_entry(evlist, evsel)
 581                 evsel->handler = drop_sample;
 582 }
 583
 584 static bool has_tracking(struct perf_evsel *evsel)
 585 {
 586         return evsel->attr.mmap || evsel->attr.mmap2 || evsel->attr.comm ||
 587                evsel->attr.task;
 588 }
 589
 590 #define COMPAT_MASK (PERF_SAMPLE_ID | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | \
 591                      PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_IDENTIFIER)
 592
 593 /*
 594  * In order that the perf.data file is parsable, tracking events like MMAP need
 595  * their selected event to exist, except if there is only 1 selected event left
 596  * and it has a compatible sample type.
 597  */
 598 static bool ok_to_remove(struct perf_evlist *evlist,
 599                          struct perf_evsel *evsel_to_remove)
 600 {
 601         struct perf_evsel *evsel;
 602         int cnt = 0;
 603         bool ok = false;
 604
 605         if (!has_tracking(evsel_to_remove))
 606                 return true;
 607
 608         evlist__for_each_entry(evlist, evsel) {
 609                 if (evsel->handler != drop_sample) {
 610                         cnt += 1;
 611                         if ((evsel->attr.sample_type & COMPAT_MASK) ==
 612                             (evsel_to_remove->attr.sample_type & COMPAT_MASK))
 613                                 ok = true;
 614                 }
 615         }
 616
 617         return ok && cnt == 1;
 618 }
 619
 620 static void strip_fini(struct perf_inject *inject)
 621 {
 622         struct perf_evlist *evlist = inject->session->evlist;
 623         struct perf_evsel *evsel, *tmp;
 624
 625         /* Remove non-synthesized evsels if possible */
 626         evlist__for_each_entry_safe(evlist, tmp, evsel) {
 627                 if (evsel->handler == drop_sample &&
 628                     ok_to_remove(evlist, evsel)) {
 629                         pr_debug("Deleting %s\n", perf_evsel__name(evsel));
 630                         perf_evlist__remove(evlist, evsel);
 631                         perf_evsel__delete(evsel);
 632                 }
 633         }
 634 }
 635
 636 static int __cmd_inject(struct perf_inject *inject)
 637 {
 638         int ret = -EINVAL;
 639         struct perf_session *session = inject->session;
 640         struct perf_data_file *file_out = &inject->output;
 641         int fd = perf_data_file__fd(file_out);
 642         u64 output_data_offset;
 643
 644         signal(SIGINT, sig_handler);
 645
 646         if (inject->build_ids || inject->sched_stat ||
 647             inject->itrace_synth_opts.set) {
 648                 inject->tool.mmap         = perf_event__repipe_mmap;
 649                 inject->tool.mmap2        = perf_event__repipe_mmap2;
 650                 inject->tool.fork         = perf_event__repipe_fork;
 651                 inject->tool.tracing_data = perf_event__repipe_tracing_data;
 652         }
 653
 654         output_data_offset = session->header.data_offset;
 655
 656         if (inject->build_ids) {
 657                 inject->tool.sample = perf_event__inject_buildid;
 658         } else if (inject->sched_stat) {
 659                 struct perf_evsel *evsel;
 660
 661                 evlist__for_each_entry(session->evlist, evsel) {
 662                         const char *name = perf_evsel__name(evsel);
 663
 664                         if (!strcmp(name, "sched:sched_switch")) {
 665                                 if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
 666                                         return -EINVAL;
 667
 668                                 evsel->handler = perf_inject__sched_switch;
 669                         } else if (!strcmp(name, "sched:sched_process_exit"))
 670                                 evsel->handler = perf_inject__sched_process_exit;
 671                         else if (!strncmp(name, "sched:sched_stat_", 17))
 672                                 evsel->handler = perf_inject__sched_stat;
 673                 }
 674         } else if (inject->itrace_synth_opts.set) {
 675                 session->itrace_synth_opts = &inject->itrace_synth_opts;
 676                 inject->itrace_synth_opts.inject = true;
 677                 inject->tool.comm           = perf_event__repipe_comm;
 678                 inject->tool.namespaces     = perf_event__repipe_namespaces;
 679                 inject->tool.exit           = perf_event__repipe_exit;
 680                 inject->tool.id_index       = perf_event__repipe_id_index;
 681                 inject->tool.auxtrace_info  = perf_event__process_auxtrace_info;
 682                 inject->tool.auxtrace       = perf_event__process_auxtrace;
 683                 inject->tool.aux            = perf_event__drop_aux;
 684                 inject->tool.itrace_start   = perf_event__drop_aux,
 685                 inject->tool.ordered_events = true;
 686                 inject->tool.ordering_requires_timestamps = true;
 687                 /* Allow space in the header for new attributes */
 688                 output_data_offset = 4096;
 689                 if (inject->strip)
 690                         strip_init(inject);
 691         }
 692
 693         if (!inject->itrace_synth_opts.set)
 694                 auxtrace_index__free(&session->auxtrace_index);
 695
 696         if (!file_out->is_pipe)
 697                 lseek(fd, output_data_offset, SEEK_SET);
 698
 699         ret = perf_session__process_events(session);
 700         if (ret)
 701                 return ret;
 702
 703         if (!file_out->is_pipe) {
 704                 if (inject->build_ids)
 705                         perf_header__set_feat(&session->header,
 706                                               HEADER_BUILD_ID);
 707                 /*
 708                  * Keep all buildids when there is unprocessed AUX data because
 709                  * it is not known which ones the AUX trace hits.
 710                  */
 711                 if (perf_header__has_feat(&session->header, HEADER_BUILD_ID) &&
 712                     inject->have_auxtrace && !inject->itrace_synth_opts.set)
 713                         dsos__hit_all(session);
 714                 /*
 715                  * The AUX areas have been removed and replaced with
 716                  * synthesized hardware events, so clear the feature flag and
 717                  * remove the evsel.
 718                  */
 719                 if (inject->itrace_synth_opts.set) {
 720                         struct perf_evsel *evsel;
 721
 722                         perf_header__clear_feat(&session->header,
 723                                                 HEADER_AUXTRACE);
 724                         if (inject->itrace_synth_opts.last_branch)
 725                                 perf_header__set_feat(&session->header,
 726                                                       HEADER_BRANCH_STACK);
 727                         evsel = perf_evlist__id2evsel_strict(session->evlist,
 728                                                              inject->aux_id);
 729                         if (evsel) {
 730                                 pr_debug("Deleting %s\n",
 731                                          perf_evsel__name(evsel));
 732                                 perf_evlist__remove(session->evlist, evsel);
 733                                 perf_evsel__delete(evsel);
 734                         }
 735                         if (inject->strip)
 736                                 strip_fini(inject);
 737                 }
 738                 session->header.data_offset = output_data_offset;
 739                 session->header.data_size = inject->bytes_written;
 740                 perf_session__write_header(session, session->evlist, fd, true);
 741         }
 742
 743         return ret;
 744 }
 745
 746 int cmd_inject(int argc, const char **argv)
 747 {
 748         struct perf_inject inject = {
 749                 .tool = {
 750                         .sample         = perf_event__repipe_sample,
 751                         .mmap           = perf_event__repipe,
 752                         .mmap2          = perf_event__repipe,
 753                         .comm           = perf_event__repipe,
 754                         .fork           = perf_event__repipe,
 755                         .exit           = perf_event__repipe,
 756                         .lost           = perf_event__repipe,
 757                         .lost_samples   = perf_event__repipe,
 758                         .aux            = perf_event__repipe,
 759                         .itrace_start   = perf_event__repipe,
 760                         .context_switch = perf_event__repipe,
 761                         .read           = perf_event__repipe_sample,
 762                         .throttle       = perf_event__repipe,
 763                         .unthrottle     = perf_event__repipe,
 764                         .attr           = perf_event__repipe_attr,
 765                         .tracing_data   = perf_event__repipe_op2_synth,
 766                         .auxtrace_info  = perf_event__repipe_op2_synth,
 767                         .auxtrace       = perf_event__repipe_auxtrace,
 768                         .auxtrace_error = perf_event__repipe_op2_synth,
 769                         .time_conv      = perf_event__repipe_op2_synth,
 770                         .finished_round = perf_event__repipe_oe_synth,
 771                         .build_id       = perf_event__repipe_op2_synth,
 772                         .id_index       = perf_event__repipe_op2_synth,
 773                 },
 774                 .input_name  = "-",
 775                 .samples = LIST_HEAD_INIT(inject.samples),
 776                 .output = {
 777                         .path = "-",
 778                         .mode = PERF_DATA_MODE_WRITE,
 779                 },
 780         };
 781         struct perf_data_file file = {
 782                 .mode = PERF_DATA_MODE_READ,
 783         };
 784         int ret;
 785
 786         struct option options[] = {
 787                 OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
 788                             "Inject build-ids into the output stream"),
 789                 OPT_STRING('i', "input", &inject.input_name, "file",
 790                            "input file name"),
 791                 OPT_STRING('o', "output", &inject.output.path, "file",
 792                            "output file name"),
 793                 OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
 794                             "Merge sched-stat and sched-switch for getting events "
 795                             "where and how long tasks slept"),
 796 #ifdef HAVE_JITDUMP
 797                 OPT_BOOLEAN('j', "jit", &inject.jit_mode, "merge jitdump files into perf.data file"),
 798 #endif
 799                 OPT_INCR('v', "verbose", &verbose,
 800                          "be more verbose (show build ids, etc)"),
 801                 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
 802                            "kallsyms pathname"),
 803                 OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
 804                 OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts,
 805                                     NULL, "opts", "Instruction Tracing options",
 806                                     itrace_parse_synth_opts),
 807                 OPT_BOOLEAN(0, "strip", &inject.strip,
 808                             "strip non-synthesized events (use with --itrace)"),
 809                 OPT_END()
 810         };
 811         const char * const inject_usage[] = {
 812                 "perf inject [<options>]",
 813                 NULL
 814         };
 815 #ifndef HAVE_JITDUMP
 816         set_option_nobuild(options, 'j', "jit", "NO_LIBELF=1", true);
 817 #endif
 818         argc = parse_options(argc, argv, options, inject_usage, 0);
 819
 820         /*
 821          * Any (unrecognized) arguments left?
 822          */
 823         if (argc)
 824                 usage_with_options(inject_usage, options);
 825
 826         if (inject.strip && !inject.itrace_synth_opts.set) {
 827                 pr_err("--strip option requires --itrace option\n");
 828                 return -1;
 829         }
 830
 831         if (perf_data_file__open(&inject.output)) {
 832                 perror("failed to create output file");
 833                 return -1;
 834         }
 835
 836         inject.tool.ordered_events = inject.sched_stat;
 837
 838         file.path = inject.input_name;
 839         inject.session = perf_session__new(&file, true, &inject.tool);
 840         if (inject.session == NULL)
 841                 return -1;
 842
 843         if (inject.build_ids) {
 844                 /*
 845                  * to make sure the mmap records are ordered correctly
 846                  * and so that the correct especially due to jitted code
 847                  * mmaps. We cannot generate the buildid hit list and
 848                  * inject the jit mmaps at the same time for now.
 849                  */
 850                 inject.tool.ordered_events = true;
 851                 inject.tool.ordering_requires_timestamps = true;
 852         }
 853 #ifdef HAVE_JITDUMP
 854         if (inject.jit_mode) {
 855                 inject.tool.mmap2          = perf_event__jit_repipe_mmap2;
 856                 inject.tool.mmap           = perf_event__jit_repipe_mmap;
 857                 inject.tool.ordered_events = true;
 858                 inject.tool.ordering_requires_timestamps = true;
 859                 /*
 860                  * JIT MMAP injection injects all MMAP events in one go, so it
 861                  * does not obey finished_round semantics.
 862                  */
 863                 inject.tool.finished_round = perf_event__drop_oe;
 864         }
 865 #endif
 866         ret = symbol__init(&inject.session->header.env);
 867         if (ret < 0)
 868                 goto out_delete;
 869
 870         ret = __cmd_inject(&inject);
 871
 872 out_delete:
 873         perf_session__delete(inject.session);
 874         return ret;
 875 }