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