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