tools/perf/builtin-inject.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * builtin-inject.c
   4  *
   5  * Builtin inject command: Examine the live mode (stdin) event stream
   6  * and repipe it to stdout while optionally injecting additional
   7  * events into it.
   8  */
   9 #include "builtin.h"
  10
  11 #include "util/color.h"
  12 #include "util/dso.h"
  13 #include "util/evlist.h"
  14 #include "util/evsel.h"
  15 #include "util/map.h"
  16 #include "util/session.h"
  17 #include "util/tool.h"
  18 #include "util/debug.h"
  19 #include "util/build-id.h"
  20 #include "util/data.h"
  21 #include "util/auxtrace.h"
  22 #include "util/jit.h"
  23 #include "util/symbol.h"
  24 #include "util/synthetic-events.h"
  25 #include "util/thread.h"
  26 #include <linux/err.h>
  27
  28 #include <subcmd/parse-options.h>
  29
  30 #include <linux/list.h>
  31 #include <errno.h>
  32 #include <signal.h>
  33
  34 struct perf_inject {
  35         struct perf_tool        tool;
  36         struct perf_session     *session;
  37         bool                    build_ids;
  38         bool                    sched_stat;
  39         bool                    have_auxtrace;
  40         bool                    strip;
  41         bool                    jit_mode;
  42         const char              *input_name;
  43         struct perf_data        output;
  44         u64                     bytes_written;
  45         u64                     aux_id;
  46         struct list_head        samples;
  47         struct itrace_synth_opts itrace_synth_opts;
  48         char                    event_copy[PERF_SAMPLE_MAX_SIZE];
  49 };
  50
  51 struct event_entry {
  52         struct list_head node;
  53         u32              tid;
  54         union perf_event event[];
  55 };
  56
  57 static int output_bytes(struct perf_inject *inject, void *buf, size_t sz)
  58 {
  59         ssize_t size;
  60
  61         size = perf_data__write(&inject->output, buf, sz);
  62         if (size < 0)
  63                 return -errno;
  64
  65         inject->bytes_written += size;
  66         return 0;
  67 }
  68
  69 static int perf_event__repipe_synth(struct perf_tool *tool,
  70                                     union perf_event *event)
  71 {
  72         struct perf_inject *inject = container_of(tool, struct perf_inject,
  73                                                   tool);
  74
  75         return output_bytes(inject, event, event->header.size);
  76 }
  77
  78 static int perf_event__repipe_oe_synth(struct perf_tool *tool,
  79                                        union perf_event *event,
  80                                        struct ordered_events *oe __maybe_unused)
  81 {
  82         return perf_event__repipe_synth(tool, event);
  83 }
  84
  85 #ifdef HAVE_JITDUMP
  86 static int perf_event__drop_oe(struct perf_tool *tool __maybe_unused,
  87                                union perf_event *event __maybe_unused,
  88                                struct ordered_events *oe __maybe_unused)
  89 {
  90         return 0;
  91 }
  92 #endif
  93
  94 static int perf_event__repipe_op2_synth(struct perf_session *session,
  95                                         union perf_event *event)
  96 {
  97         return perf_event__repipe_synth(session->tool, event);
  98 }
  99
 100 static int perf_event__repipe_attr(struct perf_tool *tool,
 101                                    union perf_event *event,
 102                                    struct evlist **pevlist)
 103 {
 104         struct perf_inject *inject = container_of(tool, struct perf_inject,
 105                                                   tool);
 106         int ret;
 107
 108         ret = perf_event__process_attr(tool, event, pevlist);
 109         if (ret)
 110                 return ret;
 111
 112         if (!inject->output.is_pipe)
 113                 return 0;
 114
 115         return perf_event__repipe_synth(tool, event);
 116 }
 117
 118 #ifdef HAVE_AUXTRACE_SUPPORT
 119
 120 static int copy_bytes(struct perf_inject *inject, int fd, off_t size)
 121 {
 122         char buf[4096];
 123         ssize_t ssz;
 124         int ret;
 125
 126         while (size > 0) {
 127                 ssz = read(fd, buf, min(size, (off_t)sizeof(buf)));
 128                 if (ssz < 0)
 129                         return -errno;
 130                 ret = output_bytes(inject, buf, ssz);
 131                 if (ret)
 132                         return ret;
 133                 size -= ssz;
 134         }
 135
 136         return 0;
 137 }
 138
 139 static s64 perf_event__repipe_auxtrace(struct perf_session *session,
 140                                        union perf_event *event)
 141 {
 142         struct perf_tool *tool = session->tool;
 143         struct perf_inject *inject = container_of(tool, struct perf_inject,
 144                                                   tool);
 145         int ret;
 146
 147         inject->have_auxtrace = true;
 148
 149         if (!inject->output.is_pipe) {
 150                 off_t offset;
 151
 152                 offset = lseek(inject->output.file.fd, 0, SEEK_CUR);
 153                 if (offset == -1)
 154                         return -errno;
 155                 ret = auxtrace_index__auxtrace_event(&session->auxtrace_index,
 156                                                      event, offset);
 157                 if (ret < 0)
 158                         return ret;
 159         }
 160
 161         if (perf_data__is_pipe(session->data) || !session->one_mmap) {
 162                 ret = output_bytes(inject, event, event->header.size);
 163                 if (ret < 0)
 164                         return ret;
 165                 ret = copy_bytes(inject, perf_data__fd(session->data),
 166                                  event->auxtrace.size);
 167         } else {
 168                 ret = output_bytes(inject, event,
 169                                    event->header.size + event->auxtrace.size);
 170         }
 171         if (ret < 0)
 172                 return ret;
 173
 174         return event->auxtrace.size;
 175 }
 176
 177 #else
 178
 179 static s64
 180 perf_event__repipe_auxtrace(struct perf_session *session __maybe_unused,
 181                             union perf_event *event __maybe_unused)
 182 {
 183         pr_err("AUX area tracing not supported\n");
 184         return -EINVAL;
 185 }
 186
 187 #endif
 188
 189 static int perf_event__repipe(struct perf_tool *tool,
 190                               union perf_event *event,
 191                               struct perf_sample *sample __maybe_unused,
 192                               struct machine *machine __maybe_unused)
 193 {
 194         return perf_event__repipe_synth(tool, event);
 195 }
 196
 197 static int perf_event__drop(struct perf_tool *tool __maybe_unused,
 198                             union perf_event *event __maybe_unused,
 199                             struct perf_sample *sample __maybe_unused,
 200                             struct machine *machine __maybe_unused)
 201 {
 202         return 0;
 203 }
 204
 205 static int perf_event__drop_aux(struct perf_tool *tool,
 206                                 union perf_event *event __maybe_unused,
 207                                 struct perf_sample *sample,
 208                                 struct machine *machine __maybe_unused)
 209 {
 210         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 211
 212         if (!inject->aux_id)
 213                 inject->aux_id = sample->id;
 214
 215         return 0;
 216 }
 217
 218 static union perf_event *
 219 perf_inject__cut_auxtrace_sample(struct perf_inject *inject,
 220                                  union perf_event *event,
 221                                  struct perf_sample *sample)
 222 {
 223         size_t sz1 = sample->aux_sample.data - (void *)event;
 224         size_t sz2 = event->header.size - sample->aux_sample.size - sz1;
 225         union perf_event *ev = (union perf_event *)inject->event_copy;
 226
 227         if (sz1 > event->header.size || sz2 > event->header.size ||
 228             sz1 + sz2 > event->header.size ||
 229             sz1 < sizeof(struct perf_event_header) + sizeof(u64))
 230                 return event;
 231
 232         memcpy(ev, event, sz1);
 233         memcpy((void *)ev + sz1, (void *)event + event->header.size - sz2, sz2);
 234         ev->header.size = sz1 + sz2;
 235         ((u64 *)((void *)ev + sz1))[-1] = 0;
 236
 237         return ev;
 238 }
 239
 240 typedef int (*inject_handler)(struct perf_tool *tool,
 241                               union perf_event *event,
 242                               struct perf_sample *sample,
 243                               struct evsel *evsel,
 244                               struct machine *machine);
 245
 246 static int perf_event__repipe_sample(struct perf_tool *tool,
 247                                      union perf_event *event,
 248                                      struct perf_sample *sample,
 249                                      struct evsel *evsel,
 250                                      struct machine *machine)
 251 {
 252         struct perf_inject *inject = container_of(tool, struct perf_inject,
 253                                                   tool);
 254
 255         if (evsel && evsel->handler) {
 256                 inject_handler f = evsel->handler;
 257                 return f(tool, event, sample, evsel, machine);
 258         }
 259
 260         build_id__mark_dso_hit(tool, event, sample, evsel, machine);
 261
 262         if (inject->itrace_synth_opts.set && sample->aux_sample.size)
 263                 event = perf_inject__cut_auxtrace_sample(inject, event, sample);
 264
 265         return perf_event__repipe_synth(tool, event);
 266 }
 267
 268 static int perf_event__repipe_mmap(struct perf_tool *tool,
 269                                    union perf_event *event,
 270                                    struct perf_sample *sample,
 271                                    struct machine *machine)
 272 {
 273         int err;
 274
 275         err = perf_event__process_mmap(tool, event, sample, machine);
 276         perf_event__repipe(tool, event, sample, machine);
 277
 278         return err;
 279 }
 280
 281 #ifdef HAVE_JITDUMP
 282 static int perf_event__jit_repipe_mmap(struct perf_tool *tool,
 283                                        union perf_event *event,
 284                                        struct perf_sample *sample,
 285                                        struct machine *machine)
 286 {
 287         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 288         u64 n = 0;
 289         int ret;
 290
 291         /*
 292          * if jit marker, then inject jit mmaps and generate ELF images
 293          */
 294         ret = jit_process(inject->session, &inject->output, machine,
 295                           event->mmap.filename, event->mmap.pid, &n);
 296         if (ret < 0)
 297                 return ret;
 298         if (ret) {
 299                 inject->bytes_written += n;
 300                 return 0;
 301         }
 302         return perf_event__repipe_mmap(tool, event, sample, machine);
 303 }
 304 #endif
 305
 306 static int perf_event__repipe_mmap2(struct perf_tool *tool,
 307                                    union perf_event *event,
 308                                    struct perf_sample *sample,
 309                                    struct machine *machine)
 310 {
 311         int err;
 312
 313         err = perf_event__process_mmap2(tool, event, sample, machine);
 314         perf_event__repipe(tool, event, sample, machine);
 315
 316         return err;
 317 }
 318
 319 #ifdef HAVE_JITDUMP
 320 static int perf_event__jit_repipe_mmap2(struct perf_tool *tool,
 321                                         union perf_event *event,
 322                                         struct perf_sample *sample,
 323                                         struct machine *machine)
 324 {
 325         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 326         u64 n = 0;
 327         int ret;
 328
 329         /*
 330          * if jit marker, then inject jit mmaps and generate ELF images
 331          */
 332         ret = jit_process(inject->session, &inject->output, machine,
 333                           event->mmap2.filename, event->mmap2.pid, &n);
 334         if (ret < 0)
 335                 return ret;
 336         if (ret) {
 337                 inject->bytes_written += n;
 338                 return 0;
 339         }
 340         return perf_event__repipe_mmap2(tool, event, sample, machine);
 341 }
 342 #endif
 343
 344 static int perf_event__repipe_fork(struct perf_tool *tool,
 345                                    union perf_event *event,
 346                                    struct perf_sample *sample,
 347                                    struct machine *machine)
 348 {
 349         int err;
 350
 351         err = perf_event__process_fork(tool, event, sample, machine);
 352         perf_event__repipe(tool, event, sample, machine);
 353
 354         return err;
 355 }
 356
 357 static int perf_event__repipe_comm(struct perf_tool *tool,
 358                                    union perf_event *event,
 359                                    struct perf_sample *sample,
 360                                    struct machine *machine)
 361 {
 362         int err;
 363
 364         err = perf_event__process_comm(tool, event, sample, machine);
 365         perf_event__repipe(tool, event, sample, machine);
 366
 367         return err;
 368 }
 369
 370 static int perf_event__repipe_namespaces(struct perf_tool *tool,
 371                                          union perf_event *event,
 372                                          struct perf_sample *sample,
 373                                          struct machine *machine)
 374 {
 375         int err = perf_event__process_namespaces(tool, event, sample, machine);
 376
 377         perf_event__repipe(tool, event, sample, machine);
 378
 379         return err;
 380 }
 381
 382 static int perf_event__repipe_exit(struct perf_tool *tool,
 383                                    union perf_event *event,
 384                                    struct perf_sample *sample,
 385                                    struct machine *machine)
 386 {
 387         int err;
 388
 389         err = perf_event__process_exit(tool, event, sample, machine);
 390         perf_event__repipe(tool, event, sample, machine);
 391
 392         return err;
 393 }
 394
 395 static int perf_event__repipe_tracing_data(struct perf_session *session,
 396                                            union perf_event *event)
 397 {
 398         int err;
 399
 400         perf_event__repipe_synth(session->tool, event);
 401         err = perf_event__process_tracing_data(session, event);
 402
 403         return err;
 404 }
 405
 406 static int dso__read_build_id(struct dso *dso)
 407 {
 408         if (dso->has_build_id)
 409                 return 0;
 410
 411         if (filename__read_build_id(dso->long_name, dso->build_id,
 412                                     sizeof(dso->build_id)) > 0) {
 413                 dso->has_build_id = true;
 414                 return 0;
 415         }
 416
 417         return -1;
 418 }
 419
 420 static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
 421                                 struct machine *machine)
 422 {
 423         u16 misc = PERF_RECORD_MISC_USER;
 424         int err;
 425
 426         if (dso__read_build_id(dso) < 0) {
 427                 pr_debug("no build_id found for %s\n", dso->long_name);
 428                 return -1;
 429         }
 430
 431         if (dso->kernel)
 432                 misc = PERF_RECORD_MISC_KERNEL;
 433
 434         err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
 435                                               machine);
 436         if (err) {
 437                 pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
 438                 return -1;
 439         }
 440
 441         return 0;
 442 }
 443
 444 static int perf_event__inject_buildid(struct perf_tool *tool,
 445                                       union perf_event *event,
 446                                       struct perf_sample *sample,
 447                                       struct evsel *evsel __maybe_unused,
 448                                       struct machine *machine)
 449 {
 450         struct addr_location al;
 451         struct thread *thread;
 452
 453         thread = machine__findnew_thread(machine, sample->pid, sample->tid);
 454         if (thread == NULL) {
 455                 pr_err("problem processing %d event, skipping it.\n",
 456                        event->header.type);
 457                 goto repipe;
 458         }
 459
 460         if (thread__find_map(thread, sample->cpumode, sample->ip, &al)) {
 461                 if (!al.map->dso->hit) {
 462                         al.map->dso->hit = 1;
 463                         if (map__load(al.map) >= 0) {
 464                                 dso__inject_build_id(al.map->dso, tool, machine);
 465                                 /*
 466                                  * If this fails, too bad, let the other side
 467                                  * account this as unresolved.
 468                                  */
 469                         } else {
 470 #ifdef HAVE_LIBELF_SUPPORT
 471                                 pr_warning("no symbols found in %s, maybe "
 472                                            "install a debug package?\n",
 473                                            al.map->dso->long_name);
 474 #endif
 475                         }
 476                 }
 477         }
 478
 479         thread__put(thread);
 480 repipe:
 481         perf_event__repipe(tool, event, sample, machine);
 482         return 0;
 483 }
 484
 485 static int perf_inject__sched_process_exit(struct perf_tool *tool,
 486                                            union perf_event *event __maybe_unused,
 487                                            struct perf_sample *sample,
 488                                            struct evsel *evsel __maybe_unused,
 489                                            struct machine *machine __maybe_unused)
 490 {
 491         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 492         struct event_entry *ent;
 493
 494         list_for_each_entry(ent, &inject->samples, node) {
 495                 if (sample->tid == ent->tid) {
 496                         list_del_init(&ent->node);
 497                         free(ent);
 498                         break;
 499                 }
 500         }
 501
 502         return 0;
 503 }
 504
 505 static int perf_inject__sched_switch(struct perf_tool *tool,
 506                                      union perf_event *event,
 507                                      struct perf_sample *sample,
 508                                      struct evsel *evsel,
 509                                      struct machine *machine)
 510 {
 511         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 512         struct event_entry *ent;
 513
 514         perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
 515
 516         ent = malloc(event->header.size + sizeof(struct event_entry));
 517         if (ent == NULL) {
 518                 color_fprintf(stderr, PERF_COLOR_RED,
 519                              "Not enough memory to process sched switch event!");
 520                 return -1;
 521         }
 522
 523         ent->tid = sample->tid;
 524         memcpy(&ent->event, event, event->header.size);
 525         list_add(&ent->node, &inject->samples);
 526         return 0;
 527 }
 528
 529 static int perf_inject__sched_stat(struct perf_tool *tool,
 530                                    union perf_event *event __maybe_unused,
 531                                    struct perf_sample *sample,
 532                                    struct evsel *evsel,
 533                                    struct machine *machine)
 534 {
 535         struct event_entry *ent;
 536         union perf_event *event_sw;
 537         struct perf_sample sample_sw;
 538         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 539         u32 pid = evsel__intval(evsel, sample, "pid");
 540
 541         list_for_each_entry(ent, &inject->samples, node) {
 542                 if (pid == ent->tid)
 543                         goto found;
 544         }
 545
 546         return 0;
 547 found:
 548         event_sw = &ent->event[0];
 549         evsel__parse_sample(evsel, event_sw, &sample_sw);
 550
 551         sample_sw.period = sample->period;
 552         sample_sw.time   = sample->time;
 553         perf_event__synthesize_sample(event_sw, evsel->core.attr.sample_type,
 554                                       evsel->core.attr.read_format, &sample_sw);
 555         build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
 556         return perf_event__repipe(tool, event_sw, &sample_sw, machine);
 557 }
 558
 559 static void sig_handler(int sig __maybe_unused)
 560 {
 561         session_done = 1;
 562 }
 563
 564 static int evsel__check_stype(struct evsel *evsel, u64 sample_type, const char *sample_msg)
 565 {
 566         struct perf_event_attr *attr = &evsel->core.attr;
 567         const char *name = evsel__name(evsel);
 568
 569         if (!(attr->sample_type & sample_type)) {
 570                 pr_err("Samples for %s event do not have %s attribute set.",
 571                         name, sample_msg);
 572                 return -EINVAL;
 573         }
 574
 575         return 0;
 576 }
 577
 578 static int drop_sample(struct perf_tool *tool __maybe_unused,
 579                        union perf_event *event __maybe_unused,
 580                        struct perf_sample *sample __maybe_unused,
 581                        struct evsel *evsel __maybe_unused,
 582                        struct machine *machine __maybe_unused)
 583 {
 584         return 0;
 585 }
 586
 587 static void strip_init(struct perf_inject *inject)
 588 {
 589         struct evlist *evlist = inject->session->evlist;
 590         struct evsel *evsel;
 591
 592         inject->tool.context_switch = perf_event__drop;
 593
 594         evlist__for_each_entry(evlist, evsel)
 595                 evsel->handler = drop_sample;
 596 }
 597
 598 static int __cmd_inject(struct perf_inject *inject)
 599 {
 600         int ret = -EINVAL;
 601         struct perf_session *session = inject->session;
 602         struct perf_data *data_out = &inject->output;
 603         int fd = perf_data__fd(data_out);
 604         u64 output_data_offset;
 605
 606         signal(SIGINT, sig_handler);
 607
 608         if (inject->build_ids || inject->sched_stat ||
 609             inject->itrace_synth_opts.set) {
 610                 inject->tool.mmap         = perf_event__repipe_mmap;
 611                 inject->tool.mmap2        = perf_event__repipe_mmap2;
 612                 inject->tool.fork         = perf_event__repipe_fork;
 613                 inject->tool.tracing_data = perf_event__repipe_tracing_data;
 614         }
 615
 616         output_data_offset = session->header.data_offset;
 617
 618         if (inject->build_ids) {
 619                 inject->tool.sample = perf_event__inject_buildid;
 620         } else if (inject->sched_stat) {
 621                 struct evsel *evsel;
 622
 623                 evlist__for_each_entry(session->evlist, evsel) {
 624                         const char *name = evsel__name(evsel);
 625
 626                         if (!strcmp(name, "sched:sched_switch")) {
 627                                 if (evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
 628                                         return -EINVAL;
 629
 630                                 evsel->handler = perf_inject__sched_switch;
 631                         } else if (!strcmp(name, "sched:sched_process_exit"))
 632                                 evsel->handler = perf_inject__sched_process_exit;
 633                         else if (!strncmp(name, "sched:sched_stat_", 17))
 634                                 evsel->handler = perf_inject__sched_stat;
 635                 }
 636         } else if (inject->itrace_synth_opts.set) {
 637                 session->itrace_synth_opts = &inject->itrace_synth_opts;
 638                 inject->itrace_synth_opts.inject = true;
 639                 inject->tool.comm           = perf_event__repipe_comm;
 640                 inject->tool.namespaces     = perf_event__repipe_namespaces;
 641                 inject->tool.exit           = perf_event__repipe_exit;
 642                 inject->tool.id_index       = perf_event__process_id_index;
 643                 inject->tool.auxtrace_info  = perf_event__process_auxtrace_info;
 644                 inject->tool.auxtrace       = perf_event__process_auxtrace;
 645                 inject->tool.aux            = perf_event__drop_aux;
 646                 inject->tool.itrace_start   = perf_event__drop_aux,
 647                 inject->tool.ordered_events = true;
 648                 inject->tool.ordering_requires_timestamps = true;
 649                 /* Allow space in the header for new attributes */
 650                 output_data_offset = 4096;
 651                 if (inject->strip)
 652                         strip_init(inject);
 653         }
 654
 655         if (!inject->itrace_synth_opts.set)
 656                 auxtrace_index__free(&session->auxtrace_index);
 657
 658         if (!data_out->is_pipe)
 659                 lseek(fd, output_data_offset, SEEK_SET);
 660
 661         ret = perf_session__process_events(session);
 662         if (ret)
 663                 return ret;
 664
 665         if (!data_out->is_pipe) {
 666                 if (inject->build_ids)
 667                         perf_header__set_feat(&session->header,
 668                                               HEADER_BUILD_ID);
 669                 /*
 670                  * Keep all buildids when there is unprocessed AUX data because
 671                  * it is not known which ones the AUX trace hits.
 672                  */
 673                 if (perf_header__has_feat(&session->header, HEADER_BUILD_ID) &&
 674                     inject->have_auxtrace && !inject->itrace_synth_opts.set)
 675                         dsos__hit_all(session);
 676                 /*
 677                  * The AUX areas have been removed and replaced with
 678                  * synthesized hardware events, so clear the feature flag and
 679                  * remove the evsel.
 680                  */
 681                 if (inject->itrace_synth_opts.set) {
 682                         struct evsel *evsel;
 683
 684                         perf_header__clear_feat(&session->header,
 685                                                 HEADER_AUXTRACE);
 686                         if (inject->itrace_synth_opts.last_branch ||
 687                             inject->itrace_synth_opts.add_last_branch)
 688                                 perf_header__set_feat(&session->header,
 689                                                       HEADER_BRANCH_STACK);
 690                         evsel = perf_evlist__id2evsel_strict(session->evlist,
 691                                                              inject->aux_id);
 692                         if (evsel) {
 693                                 pr_debug("Deleting %s\n", evsel__name(evsel));
 694                                 evlist__remove(session->evlist, evsel);
 695                                 evsel__delete(evsel);
 696                         }
 697                 }
 698                 session->header.data_offset = output_data_offset;
 699                 session->header.data_size = inject->bytes_written;
 700                 perf_session__write_header(session, session->evlist, fd, true);
 701         }
 702
 703         return ret;
 704 }
 705
 706 int cmd_inject(int argc, const char **argv)
 707 {
 708         struct perf_inject inject = {
 709                 .tool = {
 710                         .sample         = perf_event__repipe_sample,
 711                         .mmap           = perf_event__repipe,
 712                         .mmap2          = perf_event__repipe,
 713                         .comm           = perf_event__repipe,
 714                         .fork           = perf_event__repipe,
 715                         .exit           = perf_event__repipe,
 716                         .lost           = perf_event__repipe,
 717                         .lost_samples   = perf_event__repipe,
 718                         .aux            = perf_event__repipe,
 719                         .itrace_start   = perf_event__repipe,
 720                         .context_switch = perf_event__repipe,
 721                         .read           = perf_event__repipe_sample,
 722                         .throttle       = perf_event__repipe,
 723                         .unthrottle     = perf_event__repipe,
 724                         .attr           = perf_event__repipe_attr,
 725                         .tracing_data   = perf_event__repipe_op2_synth,
 726                         .auxtrace_info  = perf_event__repipe_op2_synth,
 727                         .auxtrace       = perf_event__repipe_auxtrace,
 728                         .auxtrace_error = perf_event__repipe_op2_synth,
 729                         .time_conv      = perf_event__repipe_op2_synth,
 730                         .finished_round = perf_event__repipe_oe_synth,
 731                         .build_id       = perf_event__repipe_op2_synth,
 732                         .id_index       = perf_event__repipe_op2_synth,
 733                         .feature        = perf_event__repipe_op2_synth,
 734                 },
 735                 .input_name  = "-",
 736                 .samples = LIST_HEAD_INIT(inject.samples),
 737                 .output = {
 738                         .path = "-",
 739                         .mode = PERF_DATA_MODE_WRITE,
 740                 },
 741         };
 742         struct perf_data data = {
 743                 .mode = PERF_DATA_MODE_READ,
 744         };
 745         int ret;
 746
 747         struct option options[] = {
 748                 OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
 749                             "Inject build-ids into the output stream"),
 750                 OPT_STRING('i', "input", &inject.input_name, "file",
 751                            "input file name"),
 752                 OPT_STRING('o', "output", &inject.output.path, "file",
 753                            "output file name"),
 754                 OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
 755                             "Merge sched-stat and sched-switch for getting events "
 756                             "where and how long tasks slept"),
 757 #ifdef HAVE_JITDUMP
 758                 OPT_BOOLEAN('j', "jit", &inject.jit_mode, "merge jitdump files into perf.data file"),
 759 #endif
 760                 OPT_INCR('v', "verbose", &verbose,
 761                          "be more verbose (show build ids, etc)"),
 762                 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
 763                            "kallsyms pathname"),
 764                 OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
 765                 OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts,
 766                                     NULL, "opts", "Instruction Tracing options\n"
 767                                     ITRACE_HELP,
 768                                     itrace_parse_synth_opts),
 769                 OPT_BOOLEAN(0, "strip", &inject.strip,
 770                             "strip non-synthesized events (use with --itrace)"),
 771                 OPT_END()
 772         };
 773         const char * const inject_usage[] = {
 774                 "perf inject [<options>]",
 775                 NULL
 776         };
 777 #ifndef HAVE_JITDUMP
 778         set_option_nobuild(options, 'j', "jit", "NO_LIBELF=1", true);
 779 #endif
 780         argc = parse_options(argc, argv, options, inject_usage, 0);
 781
 782         /*
 783          * Any (unrecognized) arguments left?
 784          */
 785         if (argc)
 786                 usage_with_options(inject_usage, options);
 787
 788         if (inject.strip && !inject.itrace_synth_opts.set) {
 789                 pr_err("--strip option requires --itrace option\n");
 790                 return -1;
 791         }
 792
 793         if (perf_data__open(&inject.output)) {
 794                 perror("failed to create output file");
 795                 return -1;
 796         }
 797
 798         inject.tool.ordered_events = inject.sched_stat;
 799
 800         data.path = inject.input_name;
 801         inject.session = perf_session__new(&data, true, &inject.tool);
 802         if (IS_ERR(inject.session))
 803                 return PTR_ERR(inject.session);
 804
 805         if (zstd_init(&(inject.session->zstd_data), 0) < 0)
 806                 pr_warning("Decompression initialization failed.\n");
 807
 808         if (inject.build_ids) {
 809                 /*
 810                  * to make sure the mmap records are ordered correctly
 811                  * and so that the correct especially due to jitted code
 812                  * mmaps. We cannot generate the buildid hit list and
 813                  * inject the jit mmaps at the same time for now.
 814                  */
 815                 inject.tool.ordered_events = true;
 816                 inject.tool.ordering_requires_timestamps = true;
 817         }
 818 #ifdef HAVE_JITDUMP
 819         if (inject.jit_mode) {
 820                 inject.tool.mmap2          = perf_event__jit_repipe_mmap2;
 821                 inject.tool.mmap           = perf_event__jit_repipe_mmap;
 822                 inject.tool.ordered_events = true;
 823                 inject.tool.ordering_requires_timestamps = true;
 824                 /*
 825                  * JIT MMAP injection injects all MMAP events in one go, so it
 826                  * does not obey finished_round semantics.
 827                  */
 828                 inject.tool.finished_round = perf_event__drop_oe;
 829         }
 830 #endif
 831         ret = symbol__init(&inject.session->header.env);
 832         if (ret < 0)
 833                 goto out_delete;
 834
 835         ret = __cmd_inject(&inject);
 836
 837 out_delete:
 838         zstd_fini(&(inject.session->zstd_data));
 839         perf_session__delete(inject.session);
 840         return ret;
 841 }