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