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 "perf.h"
  12 #include "util/color.h"
  13 #include "util/evlist.h"
  14 #include "util/evsel.h"
  15 #include "util/session.h"
  16 #include "util/tool.h"
  17 #include "util/debug.h"
  18 #include "util/build-id.h"
  19 #include "util/data.h"
  20 #include "util/auxtrace.h"
  21 #include "util/jit.h"
  22 #include "util/thread.h"
  23
  24 #include <subcmd/parse-options.h>
  25
  26 #include <linux/list.h>
  27 #include <errno.h>
  28 #include <signal.h>
  29
  30 struct perf_inject {
  31         struct perf_tool        tool;
  32         struct perf_session     *session;
  33         bool                    build_ids;
  34         bool                    sched_stat;
  35         bool                    have_auxtrace;
  36         bool                    strip;
  37         bool                    jit_mode;
  38         const char              *input_name;
  39         struct perf_data        output;
  40         u64                     bytes_written;
  41         u64                     aux_id;
  42         struct list_head        samples;
  43         struct itrace_synth_opts itrace_synth_opts;
  44 };
  45
  46 struct event_entry {
  47         struct list_head node;
  48         u32              tid;
  49         union perf_event event[0];
  50 };
  51
  52 static int output_bytes(struct perf_inject *inject, void *buf, size_t sz)
  53 {
  54         ssize_t size;
  55
  56         size = perf_data__write(&inject->output, buf, sz);
  57         if (size < 0)
  58                 return -errno;
  59
  60         inject->bytes_written += size;
  61         return 0;
  62 }
  63
  64 static int perf_event__repipe_synth(struct perf_tool *tool,
  65                                     union perf_event *event)
  66 {
  67         struct perf_inject *inject = container_of(tool, struct perf_inject,
  68                                                   tool);
  69
  70         return output_bytes(inject, event, event->header.size);
  71 }
  72
  73 static int perf_event__repipe_oe_synth(struct perf_tool *tool,
  74                                        union perf_event *event,
  75                                        struct ordered_events *oe __maybe_unused)
  76 {
  77         return perf_event__repipe_synth(tool, event);
  78 }
  79
  80 #ifdef HAVE_JITDUMP
  81 static int perf_event__drop_oe(struct perf_tool *tool __maybe_unused,
  82                                union perf_event *event __maybe_unused,
  83                                struct ordered_events *oe __maybe_unused)
  84 {
  85         return 0;
  86 }
  87 #endif
  88
  89 static int perf_event__repipe_op2_synth(struct perf_tool *tool,
  90                                         union perf_event *event,
  91                                         struct perf_session *session
  92                                         __maybe_unused)
  93 {
  94         return perf_event__repipe_synth(tool, event);
  95 }
  96
  97 static int perf_event__repipe_attr(struct perf_tool *tool,
  98                                    union perf_event *event,
  99                                    struct perf_evlist **pevlist)
 100 {
 101         struct perf_inject *inject = container_of(tool, struct perf_inject,
 102                                                   tool);
 103         int ret;
 104
 105         ret = perf_event__process_attr(tool, event, pevlist);
 106         if (ret)
 107                 return ret;
 108
 109         if (!inject->output.is_pipe)
 110                 return 0;
 111
 112         return perf_event__repipe_synth(tool, event);
 113 }
 114
 115 #ifdef HAVE_AUXTRACE_SUPPORT
 116
 117 static int copy_bytes(struct perf_inject *inject, int fd, off_t size)
 118 {
 119         char buf[4096];
 120         ssize_t ssz;
 121         int ret;
 122
 123         while (size > 0) {
 124                 ssz = read(fd, buf, min(size, (off_t)sizeof(buf)));
 125                 if (ssz < 0)
 126                         return -errno;
 127                 ret = output_bytes(inject, buf, ssz);
 128                 if (ret)
 129                         return ret;
 130                 size -= ssz;
 131         }
 132
 133         return 0;
 134 }
 135
 136 static s64 perf_event__repipe_auxtrace(struct perf_tool *tool,
 137                                        union perf_event *event,
 138                                        struct perf_session *session)
 139 {
 140         struct perf_inject *inject = container_of(tool, struct perf_inject,
 141                                                   tool);
 142         int ret;
 143
 144         inject->have_auxtrace = true;
 145
 146         if (!inject->output.is_pipe) {
 147                 off_t offset;
 148
 149                 offset = lseek(inject->output.file.fd, 0, SEEK_CUR);
 150                 if (offset == -1)
 151                         return -errno;
 152                 ret = auxtrace_index__auxtrace_event(&session->auxtrace_index,
 153                                                      event, offset);
 154                 if (ret < 0)
 155                         return ret;
 156         }
 157
 158         if (perf_data__is_pipe(session->data) || !session->one_mmap) {
 159                 ret = output_bytes(inject, event, event->header.size);
 160                 if (ret < 0)
 161                         return ret;
 162                 ret = copy_bytes(inject, perf_data__fd(session->data),
 163                                  event->auxtrace.size);
 164         } else {
 165                 ret = output_bytes(inject, event,
 166                                    event->header.size + event->auxtrace.size);
 167         }
 168         if (ret < 0)
 169                 return ret;
 170
 171         return event->auxtrace.size;
 172 }
 173
 174 #else
 175
 176 static s64
 177 perf_event__repipe_auxtrace(struct perf_tool *tool __maybe_unused,
 178                             union perf_event *event __maybe_unused,
 179                             struct perf_session *session __maybe_unused)
 180 {
 181         pr_err("AUX area tracing not supported\n");
 182         return -EINVAL;
 183 }
 184
 185 #endif
 186
 187 static int perf_event__repipe(struct perf_tool *tool,
 188                               union perf_event *event,
 189                               struct perf_sample *sample __maybe_unused,
 190                               struct machine *machine __maybe_unused)
 191 {
 192         return perf_event__repipe_synth(tool, event);
 193 }
 194
 195 static int perf_event__drop(struct perf_tool *tool __maybe_unused,
 196                             union perf_event *event __maybe_unused,
 197                             struct perf_sample *sample __maybe_unused,
 198                             struct machine *machine __maybe_unused)
 199 {
 200         return 0;
 201 }
 202
 203 static int perf_event__drop_aux(struct perf_tool *tool,
 204                                 union perf_event *event __maybe_unused,
 205                                 struct perf_sample *sample,
 206                                 struct machine *machine __maybe_unused)
 207 {
 208         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 209
 210         if (!inject->aux_id)
 211                 inject->aux_id = sample->id;
 212
 213         return 0;
 214 }
 215
 216 typedef int (*inject_handler)(struct perf_tool *tool,
 217                               union perf_event *event,
 218                               struct perf_sample *sample,
 219                               struct perf_evsel *evsel,
 220                               struct machine *machine);
 221
 222 static int perf_event__repipe_sample(struct perf_tool *tool,
 223                                      union perf_event *event,
 224                                      struct perf_sample *sample,
 225                                      struct perf_evsel *evsel,
 226                                      struct machine *machine)
 227 {
 228         if (evsel->handler) {
 229                 inject_handler f = evsel->handler;
 230                 return f(tool, event, sample, evsel, machine);
 231         }
 232
 233         build_id__mark_dso_hit(tool, event, sample, evsel, machine);
 234
 235         return perf_event__repipe_synth(tool, event);
 236 }
 237
 238 static int perf_event__repipe_mmap(struct perf_tool *tool,
 239                                    union perf_event *event,
 240                                    struct perf_sample *sample,
 241                                    struct machine *machine)
 242 {
 243         int err;
 244
 245         err = perf_event__process_mmap(tool, event, sample, machine);
 246         perf_event__repipe(tool, event, sample, machine);
 247
 248         return err;
 249 }
 250
 251 #ifdef HAVE_JITDUMP
 252 static int perf_event__jit_repipe_mmap(struct perf_tool *tool,
 253                                        union perf_event *event,
 254                                        struct perf_sample *sample,
 255                                        struct machine *machine)
 256 {
 257         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 258         u64 n = 0;
 259         int ret;
 260
 261         /*
 262          * if jit marker, then inject jit mmaps and generate ELF images
 263          */
 264         ret = jit_process(inject->session, &inject->output, machine,
 265                           event->mmap.filename, sample->pid, &n);
 266         if (ret < 0)
 267                 return ret;
 268         if (ret) {
 269                 inject->bytes_written += n;
 270                 return 0;
 271         }
 272         return perf_event__repipe_mmap(tool, event, sample, machine);
 273 }
 274 #endif
 275
 276 static int perf_event__repipe_mmap2(struct perf_tool *tool,
 277                                    union perf_event *event,
 278                                    struct perf_sample *sample,
 279                                    struct machine *machine)
 280 {
 281         int err;
 282
 283         err = perf_event__process_mmap2(tool, event, sample, machine);
 284         perf_event__repipe(tool, event, sample, machine);
 285
 286         return err;
 287 }
 288
 289 #ifdef HAVE_JITDUMP
 290 static int perf_event__jit_repipe_mmap2(struct perf_tool *tool,
 291                                         union perf_event *event,
 292                                         struct perf_sample *sample,
 293                                         struct machine *machine)
 294 {
 295         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 296         u64 n = 0;
 297         int ret;
 298
 299         /*
 300          * if jit marker, then inject jit mmaps and generate ELF images
 301          */
 302         ret = jit_process(inject->session, &inject->output, machine,
 303                           event->mmap2.filename, sample->pid, &n);
 304         if (ret < 0)
 305                 return ret;
 306         if (ret) {
 307                 inject->bytes_written += n;
 308                 return 0;
 309         }
 310         return perf_event__repipe_mmap2(tool, event, sample, machine);
 311 }
 312 #endif
 313
 314 static int perf_event__repipe_fork(struct perf_tool *tool,
 315                                    union perf_event *event,
 316                                    struct perf_sample *sample,
 317                                    struct machine *machine)
 318 {
 319         int err;
 320
 321         err = perf_event__process_fork(tool, event, sample, machine);
 322         perf_event__repipe(tool, event, sample, machine);
 323
 324         return err;
 325 }
 326
 327 static int perf_event__repipe_comm(struct perf_tool *tool,
 328                                    union perf_event *event,
 329                                    struct perf_sample *sample,
 330                                    struct machine *machine)
 331 {
 332         int err;
 333
 334         err = perf_event__process_comm(tool, event, sample, machine);
 335         perf_event__repipe(tool, event, sample, machine);
 336
 337         return err;
 338 }
 339
 340 static int perf_event__repipe_namespaces(struct perf_tool *tool,
 341                                          union perf_event *event,
 342                                          struct perf_sample *sample,
 343                                          struct machine *machine)
 344 {
 345         int err = perf_event__process_namespaces(tool, event, sample, machine);
 346
 347         perf_event__repipe(tool, event, sample, machine);
 348
 349         return err;
 350 }
 351
 352 static int perf_event__repipe_exit(struct perf_tool *tool,
 353                                    union perf_event *event,
 354                                    struct perf_sample *sample,
 355                                    struct machine *machine)
 356 {
 357         int err;
 358
 359         err = perf_event__process_exit(tool, event, sample, machine);
 360         perf_event__repipe(tool, event, sample, machine);
 361
 362         return err;
 363 }
 364
 365 static int perf_event__repipe_tracing_data(struct perf_tool *tool,
 366                                            union perf_event *event,
 367                                            struct perf_session *session)
 368 {
 369         int err;
 370
 371         perf_event__repipe_synth(tool, event);
 372         err = perf_event__process_tracing_data(tool, event, session);
 373
 374         return err;
 375 }
 376
 377 static int perf_event__repipe_id_index(struct perf_tool *tool,
 378                                        union perf_event *event,
 379                                        struct perf_session *session)
 380 {
 381         int err;
 382
 383         perf_event__repipe_synth(tool, event);
 384         err = perf_event__process_id_index(tool, event, session);
 385
 386         return err;
 387 }
 388
 389 static int dso__read_build_id(struct dso *dso)
 390 {
 391         if (dso->has_build_id)
 392                 return 0;
 393
 394         if (filename__read_build_id(dso->long_name, dso->build_id,
 395                                     sizeof(dso->build_id)) > 0) {
 396                 dso->has_build_id = true;
 397                 return 0;
 398         }
 399
 400         return -1;
 401 }
 402
 403 static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
 404                                 struct machine *machine)
 405 {
 406         u16 misc = PERF_RECORD_MISC_USER;
 407         int err;
 408
 409         if (dso__read_build_id(dso) < 0) {
 410                 pr_debug("no build_id found for %s\n", dso->long_name);
 411                 return -1;
 412         }
 413
 414         if (dso->kernel)
 415                 misc = PERF_RECORD_MISC_KERNEL;
 416
 417         err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
 418                                               machine);
 419         if (err) {
 420                 pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
 421                 return -1;
 422         }
 423
 424         return 0;
 425 }
 426
 427 static int perf_event__inject_buildid(struct perf_tool *tool,
 428                                       union perf_event *event,
 429                                       struct perf_sample *sample,
 430                                       struct perf_evsel *evsel __maybe_unused,
 431                                       struct machine *machine)
 432 {
 433         struct addr_location al;
 434         struct thread *thread;
 435
 436         thread = machine__findnew_thread(machine, sample->pid, sample->tid);
 437         if (thread == NULL) {
 438                 pr_err("problem processing %d event, skipping it.\n",
 439                        event->header.type);
 440                 goto repipe;
 441         }
 442
 443         if (thread__find_map(thread, sample->cpumode, sample->ip, &al)) {
 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         build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
 539         return perf_event__repipe(tool, event_sw, &sample_sw, machine);
 540 }
 541
 542 static void sig_handler(int sig __maybe_unused)
 543 {
 544         session_done = 1;
 545 }
 546
 547 static int perf_evsel__check_stype(struct perf_evsel *evsel,
 548                                    u64 sample_type, const char *sample_msg)
 549 {
 550         struct perf_event_attr *attr = &evsel->attr;
 551         const char *name = perf_evsel__name(evsel);
 552
 553         if (!(attr->sample_type & sample_type)) {
 554                 pr_err("Samples for %s event do not have %s attribute set.",
 555                         name, sample_msg);
 556                 return -EINVAL;
 557         }
 558
 559         return 0;
 560 }
 561
 562 static int drop_sample(struct perf_tool *tool __maybe_unused,
 563                        union perf_event *event __maybe_unused,
 564                        struct perf_sample *sample __maybe_unused,
 565                        struct perf_evsel *evsel __maybe_unused,
 566                        struct machine *machine __maybe_unused)
 567 {
 568         return 0;
 569 }
 570
 571 static void strip_init(struct perf_inject *inject)
 572 {
 573         struct perf_evlist *evlist = inject->session->evlist;
 574         struct perf_evsel *evsel;
 575
 576         inject->tool.context_switch = perf_event__drop;
 577
 578         evlist__for_each_entry(evlist, evsel)
 579                 evsel->handler = drop_sample;
 580 }
 581
 582 static bool has_tracking(struct perf_evsel *evsel)
 583 {
 584         return evsel->attr.mmap || evsel->attr.mmap2 || evsel->attr.comm ||
 585                evsel->attr.task;
 586 }
 587
 588 #define COMPAT_MASK (PERF_SAMPLE_ID | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | \
 589                      PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_IDENTIFIER)
 590
 591 /*
 592  * In order that the perf.data file is parsable, tracking events like MMAP need
 593  * their selected event to exist, except if there is only 1 selected event left
 594  * and it has a compatible sample type.
 595  */
 596 static bool ok_to_remove(struct perf_evlist *evlist,
 597                          struct perf_evsel *evsel_to_remove)
 598 {
 599         struct perf_evsel *evsel;
 600         int cnt = 0;
 601         bool ok = false;
 602
 603         if (!has_tracking(evsel_to_remove))
 604                 return true;
 605
 606         evlist__for_each_entry(evlist, evsel) {
 607                 if (evsel->handler != drop_sample) {
 608                         cnt += 1;
 609                         if ((evsel->attr.sample_type & COMPAT_MASK) ==
 610                             (evsel_to_remove->attr.sample_type & COMPAT_MASK))
 611                                 ok = true;
 612                 }
 613         }
 614
 615         return ok && cnt == 1;
 616 }
 617
 618 static void strip_fini(struct perf_inject *inject)
 619 {
 620         struct perf_evlist *evlist = inject->session->evlist;
 621         struct perf_evsel *evsel, *tmp;
 622
 623         /* Remove non-synthesized evsels if possible */
 624         evlist__for_each_entry_safe(evlist, tmp, evsel) {
 625                 if (evsel->handler == drop_sample &&
 626                     ok_to_remove(evlist, evsel)) {
 627                         pr_debug("Deleting %s\n", perf_evsel__name(evsel));
 628                         perf_evlist__remove(evlist, evsel);
 629                         perf_evsel__delete(evsel);
 630                 }
 631         }
 632 }
 633
 634 static int __cmd_inject(struct perf_inject *inject)
 635 {
 636         int ret = -EINVAL;
 637         struct perf_session *session = inject->session;
 638         struct perf_data *data_out = &inject->output;
 639         int fd = perf_data__fd(data_out);
 640         u64 output_data_offset;
 641
 642         signal(SIGINT, sig_handler);
 643
 644         if (inject->build_ids || inject->sched_stat ||
 645             inject->itrace_synth_opts.set) {
 646                 inject->tool.mmap         = perf_event__repipe_mmap;
 647                 inject->tool.mmap2        = perf_event__repipe_mmap2;
 648                 inject->tool.fork         = perf_event__repipe_fork;
 649                 inject->tool.tracing_data = perf_event__repipe_tracing_data;
 650         }
 651
 652         output_data_offset = session->header.data_offset;
 653
 654         if (inject->build_ids) {
 655                 inject->tool.sample = perf_event__inject_buildid;
 656         } else if (inject->sched_stat) {
 657                 struct perf_evsel *evsel;
 658
 659                 evlist__for_each_entry(session->evlist, evsel) {
 660                         const char *name = perf_evsel__name(evsel);
 661
 662                         if (!strcmp(name, "sched:sched_switch")) {
 663                                 if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
 664                                         return -EINVAL;
 665
 666                                 evsel->handler = perf_inject__sched_switch;
 667                         } else if (!strcmp(name, "sched:sched_process_exit"))
 668                                 evsel->handler = perf_inject__sched_process_exit;
 669                         else if (!strncmp(name, "sched:sched_stat_", 17))
 670                                 evsel->handler = perf_inject__sched_stat;
 671                 }
 672         } else if (inject->itrace_synth_opts.set) {
 673                 session->itrace_synth_opts = &inject->itrace_synth_opts;
 674                 inject->itrace_synth_opts.inject = true;
 675                 inject->tool.comm           = perf_event__repipe_comm;
 676                 inject->tool.namespaces     = perf_event__repipe_namespaces;
 677                 inject->tool.exit           = perf_event__repipe_exit;
 678                 inject->tool.id_index       = perf_event__repipe_id_index;
 679                 inject->tool.auxtrace_info  = perf_event__process_auxtrace_info;
 680                 inject->tool.auxtrace       = perf_event__process_auxtrace;
 681                 inject->tool.aux            = perf_event__drop_aux;
 682                 inject->tool.itrace_start   = perf_event__drop_aux,
 683                 inject->tool.ordered_events = true;
 684                 inject->tool.ordering_requires_timestamps = true;
 685                 /* Allow space in the header for new attributes */
 686                 output_data_offset = 4096;
 687                 if (inject->strip)
 688                         strip_init(inject);
 689         }
 690
 691         if (!inject->itrace_synth_opts.set)
 692                 auxtrace_index__free(&session->auxtrace_index);
 693
 694         if (!data_out->is_pipe)
 695                 lseek(fd, output_data_offset, SEEK_SET);
 696
 697         ret = perf_session__process_events(session);
 698         if (ret)
 699                 return ret;
 700
 701         if (!data_out->is_pipe) {
 702                 if (inject->build_ids)
 703                         perf_header__set_feat(&session->header,
 704                                               HEADER_BUILD_ID);
 705                 /*
 706                  * Keep all buildids when there is unprocessed AUX data because
 707                  * it is not known which ones the AUX trace hits.
 708                  */
 709                 if (perf_header__has_feat(&session->header, HEADER_BUILD_ID) &&
 710                     inject->have_auxtrace && !inject->itrace_synth_opts.set)
 711                         dsos__hit_all(session);
 712                 /*
 713                  * The AUX areas have been removed and replaced with
 714                  * synthesized hardware events, so clear the feature flag and
 715                  * remove the evsel.
 716                  */
 717                 if (inject->itrace_synth_opts.set) {
 718                         struct perf_evsel *evsel;
 719
 720                         perf_header__clear_feat(&session->header,
 721                                                 HEADER_AUXTRACE);
 722                         if (inject->itrace_synth_opts.last_branch)
 723                                 perf_header__set_feat(&session->header,
 724                                                       HEADER_BRANCH_STACK);
 725                         evsel = perf_evlist__id2evsel_strict(session->evlist,
 726                                                              inject->aux_id);
 727                         if (evsel) {
 728                                 pr_debug("Deleting %s\n",
 729                                          perf_evsel__name(evsel));
 730                                 perf_evlist__remove(session->evlist, evsel);
 731                                 perf_evsel__delete(evsel);
 732                         }
 733                         if (inject->strip)
 734                                 strip_fini(inject);
 735                 }
 736                 session->header.data_offset = output_data_offset;
 737                 session->header.data_size = inject->bytes_written;
 738                 perf_session__write_header(session, session->evlist, fd, true);
 739         }
 740
 741         return ret;
 742 }
 743
 744 int cmd_inject(int argc, const char **argv)
 745 {
 746         struct perf_inject inject = {
 747                 .tool = {
 748                         .sample         = perf_event__repipe_sample,
 749                         .mmap           = perf_event__repipe,
 750                         .mmap2          = perf_event__repipe,
 751                         .comm           = perf_event__repipe,
 752                         .fork           = perf_event__repipe,
 753                         .exit           = perf_event__repipe,
 754                         .lost           = perf_event__repipe,
 755                         .lost_samples   = perf_event__repipe,
 756                         .aux            = perf_event__repipe,
 757                         .itrace_start   = perf_event__repipe,
 758                         .context_switch = perf_event__repipe,
 759                         .read           = perf_event__repipe_sample,
 760                         .throttle       = perf_event__repipe,
 761                         .unthrottle     = perf_event__repipe,
 762                         .attr           = perf_event__repipe_attr,
 763                         .tracing_data   = perf_event__repipe_op2_synth,
 764                         .auxtrace_info  = perf_event__repipe_op2_synth,
 765                         .auxtrace       = perf_event__repipe_auxtrace,
 766                         .auxtrace_error = perf_event__repipe_op2_synth,
 767                         .time_conv      = perf_event__repipe_op2_synth,
 768                         .finished_round = perf_event__repipe_oe_synth,
 769                         .build_id       = perf_event__repipe_op2_synth,
 770                         .id_index       = perf_event__repipe_op2_synth,
 771                         .feature        = perf_event__repipe_op2_synth,
 772                 },
 773                 .input_name  = "-",
 774                 .samples = LIST_HEAD_INIT(inject.samples),
 775                 .output = {
 776                         .file      = {
 777                                 .path = "-",
 778                         },
 779                         .mode      = PERF_DATA_MODE_WRITE,
 780                 },
 781         };
 782         struct perf_data data = {
 783                 .mode = PERF_DATA_MODE_READ,
 784         };
 785         int ret;
 786
 787         struct option options[] = {
 788                 OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
 789                             "Inject build-ids into the output stream"),
 790                 OPT_STRING('i', "input", &inject.input_name, "file",
 791                            "input file name"),
 792                 OPT_STRING('o', "output", &inject.output.file.path, "file",
 793                            "output file name"),
 794                 OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
 795                             "Merge sched-stat and sched-switch for getting events "
 796                             "where and how long tasks slept"),
 797 #ifdef HAVE_JITDUMP
 798                 OPT_BOOLEAN('j', "jit", &inject.jit_mode, "merge jitdump files into perf.data file"),
 799 #endif
 800                 OPT_INCR('v', "verbose", &verbose,
 801                          "be more verbose (show build ids, etc)"),
 802                 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
 803                            "kallsyms pathname"),
 804                 OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
 805                 OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts,
 806                                     NULL, "opts", "Instruction Tracing options",
 807                                     itrace_parse_synth_opts),
 808                 OPT_BOOLEAN(0, "strip", &inject.strip,
 809                             "strip non-synthesized events (use with --itrace)"),
 810                 OPT_END()
 811         };
 812         const char * const inject_usage[] = {
 813                 "perf inject [<options>]",
 814                 NULL
 815         };
 816 #ifndef HAVE_JITDUMP
 817         set_option_nobuild(options, 'j', "jit", "NO_LIBELF=1", true);
 818 #endif
 819         argc = parse_options(argc, argv, options, inject_usage, 0);
 820
 821         /*
 822          * Any (unrecognized) arguments left?
 823          */
 824         if (argc)
 825                 usage_with_options(inject_usage, options);
 826
 827         if (inject.strip && !inject.itrace_synth_opts.set) {
 828                 pr_err("--strip option requires --itrace option\n");
 829                 return -1;
 830         }
 831
 832         if (perf_data__open(&inject.output)) {
 833                 perror("failed to create output file");
 834                 return -1;
 835         }
 836
 837         inject.tool.ordered_events = inject.sched_stat;
 838
 839         data.file.path = inject.input_name;
 840         inject.session = perf_session__new(&data, true, &inject.tool);
 841         if (inject.session == NULL)
 842                 return -1;
 843
 844         if (inject.build_ids) {
 845                 /*
 846                  * to make sure the mmap records are ordered correctly
 847                  * and so that the correct especially due to jitted code
 848                  * mmaps. We cannot generate the buildid hit list and
 849                  * inject the jit mmaps at the same time for now.
 850                  */
 851                 inject.tool.ordered_events = true;
 852                 inject.tool.ordering_requires_timestamps = true;
 853         }
 854 #ifdef HAVE_JITDUMP
 855         if (inject.jit_mode) {
 856                 inject.tool.mmap2          = perf_event__jit_repipe_mmap2;
 857                 inject.tool.mmap           = perf_event__jit_repipe_mmap;
 858                 inject.tool.ordered_events = true;
 859                 inject.tool.ordering_requires_timestamps = true;
 860                 /*
 861                  * JIT MMAP injection injects all MMAP events in one go, so it
 862                  * does not obey finished_round semantics.
 863                  */
 864                 inject.tool.finished_round = perf_event__drop_oe;
 865         }
 866 #endif
 867         ret = symbol__init(&inject.session->header.env);
 868         if (ret < 0)
 869                 goto out_delete;
 870
 871         ret = __cmd_inject(&inject);
 872
 873 out_delete:
 874         perf_session__delete(inject.session);
 875         return ret;
 876 }