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                                        __maybe_unused)
 136 {
 137         struct perf_inject *inject = container_of(tool, struct perf_inject,
 138                                                   tool);
 139         int ret;
 140
 141         inject->have_auxtrace = true;
 142
 143         if (!inject->output.is_pipe) {
 144                 off_t offset;
 145
 146                 offset = lseek(inject->output.fd, 0, SEEK_CUR);
 147                 if (offset == -1)
 148                         return -errno;
 149                 ret = auxtrace_index__auxtrace_event(&session->auxtrace_index,
 150                                                      event, offset);
 151                 if (ret < 0)
 152                         return ret;
 153         }
 154
 155         if (perf_data_file__is_pipe(session->file) || !session->one_mmap) {
 156                 ret = output_bytes(inject, event, event->header.size);
 157                 if (ret < 0)
 158                         return ret;
 159                 ret = copy_bytes(inject, perf_data_file__fd(session->file),
 160                                  event->auxtrace.size);
 161         } else {
 162                 ret = output_bytes(inject, event,
 163                                    event->header.size + event->auxtrace.size);
 164         }
 165         if (ret < 0)
 166                 return ret;
 167
 168         return event->auxtrace.size;
 169 }
 170
 171 #else
 172
 173 static s64
 174 perf_event__repipe_auxtrace(struct perf_tool *tool __maybe_unused,
 175                             union perf_event *event __maybe_unused,
 176                             struct perf_session *session __maybe_unused)
 177 {
 178         pr_err("AUX area tracing not supported\n");
 179         return -EINVAL;
 180 }
 181
 182 #endif
 183
 184 static int perf_event__repipe(struct perf_tool *tool,
 185                               union perf_event *event,
 186                               struct perf_sample *sample __maybe_unused,
 187                               struct machine *machine __maybe_unused)
 188 {
 189         return perf_event__repipe_synth(tool, event);
 190 }
 191
 192 static int perf_event__drop(struct perf_tool *tool __maybe_unused,
 193                             union perf_event *event __maybe_unused,
 194                             struct perf_sample *sample __maybe_unused,
 195                             struct machine *machine __maybe_unused)
 196 {
 197         return 0;
 198 }
 199
 200 static int perf_event__drop_aux(struct perf_tool *tool,
 201                                 union perf_event *event __maybe_unused,
 202                                 struct perf_sample *sample,
 203                                 struct machine *machine __maybe_unused)
 204 {
 205         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 206
 207         if (!inject->aux_id)
 208                 inject->aux_id = sample->id;
 209
 210         return 0;
 211 }
 212
 213 typedef int (*inject_handler)(struct perf_tool *tool,
 214                               union perf_event *event,
 215                               struct perf_sample *sample,
 216                               struct perf_evsel *evsel,
 217                               struct machine *machine);
 218
 219 static int perf_event__repipe_sample(struct perf_tool *tool,
 220                                      union perf_event *event,
 221                                      struct perf_sample *sample,
 222                                      struct perf_evsel *evsel,
 223                                      struct machine *machine)
 224 {
 225         if (evsel->handler) {
 226                 inject_handler f = evsel->handler;
 227                 return f(tool, event, sample, evsel, machine);
 228         }
 229
 230         build_id__mark_dso_hit(tool, event, sample, evsel, machine);
 231
 232         return perf_event__repipe_synth(tool, event);
 233 }
 234
 235 static int perf_event__repipe_mmap(struct perf_tool *tool,
 236                                    union perf_event *event,
 237                                    struct perf_sample *sample,
 238                                    struct machine *machine)
 239 {
 240         int err;
 241
 242         err = perf_event__process_mmap(tool, event, sample, machine);
 243         perf_event__repipe(tool, event, sample, machine);
 244
 245         return err;
 246 }
 247
 248 #ifdef HAVE_JITDUMP
 249 static int perf_event__jit_repipe_mmap(struct perf_tool *tool,
 250                                        union perf_event *event,
 251                                        struct perf_sample *sample,
 252                                        struct machine *machine)
 253 {
 254         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 255         u64 n = 0;
 256         int ret;
 257
 258         /*
 259          * if jit marker, then inject jit mmaps and generate ELF images
 260          */
 261         ret = jit_process(inject->session, &inject->output, machine,
 262                           event->mmap.filename, sample->pid, &n);
 263         if (ret < 0)
 264                 return ret;
 265         if (ret) {
 266                 inject->bytes_written += n;
 267                 return 0;
 268         }
 269         return perf_event__repipe_mmap(tool, event, sample, machine);
 270 }
 271 #endif
 272
 273 static int perf_event__repipe_mmap2(struct perf_tool *tool,
 274                                    union perf_event *event,
 275                                    struct perf_sample *sample,
 276                                    struct machine *machine)
 277 {
 278         int err;
 279
 280         err = perf_event__process_mmap2(tool, event, sample, machine);
 281         perf_event__repipe(tool, event, sample, machine);
 282
 283         return err;
 284 }
 285
 286 #ifdef HAVE_JITDUMP
 287 static int perf_event__jit_repipe_mmap2(struct perf_tool *tool,
 288                                         union perf_event *event,
 289                                         struct perf_sample *sample,
 290                                         struct machine *machine)
 291 {
 292         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 293         u64 n = 0;
 294         int ret;
 295
 296         /*
 297          * if jit marker, then inject jit mmaps and generate ELF images
 298          */
 299         ret = jit_process(inject->session, &inject->output, machine,
 300                           event->mmap2.filename, sample->pid, &n);
 301         if (ret < 0)
 302                 return ret;
 303         if (ret) {
 304                 inject->bytes_written += n;
 305                 return 0;
 306         }
 307         return perf_event__repipe_mmap2(tool, event, sample, machine);
 308 }
 309 #endif
 310
 311 static int perf_event__repipe_fork(struct perf_tool *tool,
 312                                    union perf_event *event,
 313                                    struct perf_sample *sample,
 314                                    struct machine *machine)
 315 {
 316         int err;
 317
 318         err = perf_event__process_fork(tool, event, sample, machine);
 319         perf_event__repipe(tool, event, sample, machine);
 320
 321         return err;
 322 }
 323
 324 static int perf_event__repipe_comm(struct perf_tool *tool,
 325                                    union perf_event *event,
 326                                    struct perf_sample *sample,
 327                                    struct machine *machine)
 328 {
 329         int err;
 330
 331         err = perf_event__process_comm(tool, event, sample, machine);
 332         perf_event__repipe(tool, event, sample, machine);
 333
 334         return err;
 335 }
 336
 337 static int perf_event__repipe_exit(struct perf_tool *tool,
 338                                    union perf_event *event,
 339                                    struct perf_sample *sample,
 340                                    struct machine *machine)
 341 {
 342         int err;
 343
 344         err = perf_event__process_exit(tool, event, sample, machine);
 345         perf_event__repipe(tool, event, sample, machine);
 346
 347         return err;
 348 }
 349
 350 static int perf_event__repipe_tracing_data(struct perf_tool *tool,
 351                                            union perf_event *event,
 352                                            struct perf_session *session)
 353 {
 354         int err;
 355
 356         perf_event__repipe_synth(tool, event);
 357         err = perf_event__process_tracing_data(tool, event, session);
 358
 359         return err;
 360 }
 361
 362 static int perf_event__repipe_id_index(struct perf_tool *tool,
 363                                        union perf_event *event,
 364                                        struct perf_session *session)
 365 {
 366         int err;
 367
 368         perf_event__repipe_synth(tool, event);
 369         err = perf_event__process_id_index(tool, event, session);
 370
 371         return err;
 372 }
 373
 374 static int dso__read_build_id(struct dso *dso)
 375 {
 376         if (dso->has_build_id)
 377                 return 0;
 378
 379         if (filename__read_build_id(dso->long_name, dso->build_id,
 380                                     sizeof(dso->build_id)) > 0) {
 381                 dso->has_build_id = true;
 382                 return 0;
 383         }
 384
 385         return -1;
 386 }
 387
 388 static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
 389                                 struct machine *machine)
 390 {
 391         u16 misc = PERF_RECORD_MISC_USER;
 392         int err;
 393
 394         if (dso__read_build_id(dso) < 0) {
 395                 pr_debug("no build_id found for %s\n", dso->long_name);
 396                 return -1;
 397         }
 398
 399         if (dso->kernel)
 400                 misc = PERF_RECORD_MISC_KERNEL;
 401
 402         err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
 403                                               machine);
 404         if (err) {
 405                 pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
 406                 return -1;
 407         }
 408
 409         return 0;
 410 }
 411
 412 static int perf_event__inject_buildid(struct perf_tool *tool,
 413                                       union perf_event *event,
 414                                       struct perf_sample *sample,
 415                                       struct perf_evsel *evsel __maybe_unused,
 416                                       struct machine *machine)
 417 {
 418         struct addr_location al;
 419         struct thread *thread;
 420         u8 cpumode;
 421
 422         cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 423
 424         thread = machine__findnew_thread(machine, sample->pid, sample->tid);
 425         if (thread == NULL) {
 426                 pr_err("problem processing %d event, skipping it.\n",
 427                        event->header.type);
 428                 goto repipe;
 429         }
 430
 431         thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, &al);
 432
 433         if (al.map != NULL) {
 434                 if (!al.map->dso->hit) {
 435                         al.map->dso->hit = 1;
 436                         if (map__load(al.map, NULL) >= 0) {
 437                                 dso__inject_build_id(al.map->dso, tool, machine);
 438                                 /*
 439                                  * If this fails, too bad, let the other side
 440                                  * account this as unresolved.
 441                                  */
 442                         } else {
 443 #ifdef HAVE_LIBELF_SUPPORT
 444                                 pr_warning("no symbols found in %s, maybe "
 445                                            "install a debug package?\n",
 446                                            al.map->dso->long_name);
 447 #endif
 448                         }
 449                 }
 450         }
 451
 452         thread__put(thread);
 453 repipe:
 454         perf_event__repipe(tool, event, sample, machine);
 455         return 0;
 456 }
 457
 458 static int perf_inject__sched_process_exit(struct perf_tool *tool,
 459                                            union perf_event *event __maybe_unused,
 460                                            struct perf_sample *sample,
 461                                            struct perf_evsel *evsel __maybe_unused,
 462                                            struct machine *machine __maybe_unused)
 463 {
 464         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 465         struct event_entry *ent;
 466
 467         list_for_each_entry(ent, &inject->samples, node) {
 468                 if (sample->tid == ent->tid) {
 469                         list_del_init(&ent->node);
 470                         free(ent);
 471                         break;
 472                 }
 473         }
 474
 475         return 0;
 476 }
 477
 478 static int perf_inject__sched_switch(struct perf_tool *tool,
 479                                      union perf_event *event,
 480                                      struct perf_sample *sample,
 481                                      struct perf_evsel *evsel,
 482                                      struct machine *machine)
 483 {
 484         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 485         struct event_entry *ent;
 486
 487         perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
 488
 489         ent = malloc(event->header.size + sizeof(struct event_entry));
 490         if (ent == NULL) {
 491                 color_fprintf(stderr, PERF_COLOR_RED,
 492                              "Not enough memory to process sched switch event!");
 493                 return -1;
 494         }
 495
 496         ent->tid = sample->tid;
 497         memcpy(&ent->event, event, event->header.size);
 498         list_add(&ent->node, &inject->samples);
 499         return 0;
 500 }
 501
 502 static int perf_inject__sched_stat(struct perf_tool *tool,
 503                                    union perf_event *event __maybe_unused,
 504                                    struct perf_sample *sample,
 505                                    struct perf_evsel *evsel,
 506                                    struct machine *machine)
 507 {
 508         struct event_entry *ent;
 509         union perf_event *event_sw;
 510         struct perf_sample sample_sw;
 511         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 512         u32 pid = perf_evsel__intval(evsel, sample, "pid");
 513
 514         list_for_each_entry(ent, &inject->samples, node) {
 515                 if (pid == ent->tid)
 516                         goto found;
 517         }
 518
 519         return 0;
 520 found:
 521         event_sw = &ent->event[0];
 522         perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
 523
 524         sample_sw.period = sample->period;
 525         sample_sw.time   = sample->time;
 526         perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
 527                                       evsel->attr.read_format, &sample_sw,
 528                                       false);
 529         build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
 530         return perf_event__repipe(tool, event_sw, &sample_sw, machine);
 531 }
 532
 533 static void sig_handler(int sig __maybe_unused)
 534 {
 535         session_done = 1;
 536 }
 537
 538 static int perf_evsel__check_stype(struct perf_evsel *evsel,
 539                                    u64 sample_type, const char *sample_msg)
 540 {
 541         struct perf_event_attr *attr = &evsel->attr;
 542         const char *name = perf_evsel__name(evsel);
 543
 544         if (!(attr->sample_type & sample_type)) {
 545                 pr_err("Samples for %s event do not have %s attribute set.",
 546                         name, sample_msg);
 547                 return -EINVAL;
 548         }
 549
 550         return 0;
 551 }
 552
 553 static int drop_sample(struct perf_tool *tool __maybe_unused,
 554                        union perf_event *event __maybe_unused,
 555                        struct perf_sample *sample __maybe_unused,
 556                        struct perf_evsel *evsel __maybe_unused,
 557                        struct machine *machine __maybe_unused)
 558 {
 559         return 0;
 560 }
 561
 562 static void strip_init(struct perf_inject *inject)
 563 {
 564         struct perf_evlist *evlist = inject->session->evlist;
 565         struct perf_evsel *evsel;
 566
 567         inject->tool.context_switch = perf_event__drop;
 568
 569         evlist__for_each(evlist, evsel)
 570                 evsel->handler = drop_sample;
 571 }
 572
 573 static bool has_tracking(struct perf_evsel *evsel)
 574 {
 575         return evsel->attr.mmap || evsel->attr.mmap2 || evsel->attr.comm ||
 576                evsel->attr.task;
 577 }
 578
 579 #define COMPAT_MASK (PERF_SAMPLE_ID | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | \
 580                      PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_IDENTIFIER)
 581
 582 /*
 583  * In order that the perf.data file is parsable, tracking events like MMAP need
 584  * their selected event to exist, except if there is only 1 selected event left
 585  * and it has a compatible sample type.
 586  */
 587 static bool ok_to_remove(struct perf_evlist *evlist,
 588                          struct perf_evsel *evsel_to_remove)
 589 {
 590         struct perf_evsel *evsel;
 591         int cnt = 0;
 592         bool ok = false;
 593
 594         if (!has_tracking(evsel_to_remove))
 595                 return true;
 596
 597         evlist__for_each(evlist, evsel) {
 598                 if (evsel->handler != drop_sample) {
 599                         cnt += 1;
 600                         if ((evsel->attr.sample_type & COMPAT_MASK) ==
 601                             (evsel_to_remove->attr.sample_type & COMPAT_MASK))
 602                                 ok = true;
 603                 }
 604         }
 605
 606         return ok && cnt == 1;
 607 }
 608
 609 static void strip_fini(struct perf_inject *inject)
 610 {
 611         struct perf_evlist *evlist = inject->session->evlist;
 612         struct perf_evsel *evsel, *tmp;
 613
 614         /* Remove non-synthesized evsels if possible */
 615         evlist__for_each_safe(evlist, tmp, evsel) {
 616                 if (evsel->handler == drop_sample &&
 617                     ok_to_remove(evlist, evsel)) {
 618                         pr_debug("Deleting %s\n", perf_evsel__name(evsel));
 619                         perf_evlist__remove(evlist, evsel);
 620                         perf_evsel__delete(evsel);
 621                 }
 622         }
 623 }
 624
 625 static int __cmd_inject(struct perf_inject *inject)
 626 {
 627         int ret = -EINVAL;
 628         struct perf_session *session = inject->session;
 629         struct perf_data_file *file_out = &inject->output;
 630         int fd = perf_data_file__fd(file_out);
 631         u64 output_data_offset;
 632
 633         signal(SIGINT, sig_handler);
 634
 635         if (inject->build_ids || inject->sched_stat ||
 636             inject->itrace_synth_opts.set) {
 637                 inject->tool.mmap         = perf_event__repipe_mmap;
 638                 inject->tool.mmap2        = perf_event__repipe_mmap2;
 639                 inject->tool.fork         = perf_event__repipe_fork;
 640                 inject->tool.tracing_data = perf_event__repipe_tracing_data;
 641         }
 642
 643         output_data_offset = session->header.data_offset;
 644
 645         if (inject->build_ids) {
 646                 inject->tool.sample = perf_event__inject_buildid;
 647         } else if (inject->sched_stat) {
 648                 struct perf_evsel *evsel;
 649
 650                 evlist__for_each(session->evlist, evsel) {
 651                         const char *name = perf_evsel__name(evsel);
 652
 653                         if (!strcmp(name, "sched:sched_switch")) {
 654                                 if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
 655                                         return -EINVAL;
 656
 657                                 evsel->handler = perf_inject__sched_switch;
 658                         } else if (!strcmp(name, "sched:sched_process_exit"))
 659                                 evsel->handler = perf_inject__sched_process_exit;
 660                         else if (!strncmp(name, "sched:sched_stat_", 17))
 661                                 evsel->handler = perf_inject__sched_stat;
 662                 }
 663         } else if (inject->itrace_synth_opts.set) {
 664                 session->itrace_synth_opts = &inject->itrace_synth_opts;
 665                 inject->itrace_synth_opts.inject = true;
 666                 inject->tool.comm           = perf_event__repipe_comm;
 667                 inject->tool.exit           = perf_event__repipe_exit;
 668                 inject->tool.id_index       = perf_event__repipe_id_index;
 669                 inject->tool.auxtrace_info  = perf_event__process_auxtrace_info;
 670                 inject->tool.auxtrace       = perf_event__process_auxtrace;
 671                 inject->tool.aux            = perf_event__drop_aux;
 672                 inject->tool.itrace_start   = perf_event__drop_aux,
 673                 inject->tool.ordered_events = true;
 674                 inject->tool.ordering_requires_timestamps = true;
 675                 /* Allow space in the header for new attributes */
 676                 output_data_offset = 4096;
 677                 if (inject->strip)
 678                         strip_init(inject);
 679         }
 680
 681         if (!inject->itrace_synth_opts.set)
 682                 auxtrace_index__free(&session->auxtrace_index);
 683
 684         if (!file_out->is_pipe)
 685                 lseek(fd, output_data_offset, SEEK_SET);
 686
 687         ret = perf_session__process_events(session);
 688
 689         if (!file_out->is_pipe) {
 690                 if (inject->build_ids)
 691                         perf_header__set_feat(&session->header,
 692                                               HEADER_BUILD_ID);
 693                 /*
 694                  * Keep all buildids when there is unprocessed AUX data because
 695                  * it is not known which ones the AUX trace hits.
 696                  */
 697                 if (perf_header__has_feat(&session->header, HEADER_BUILD_ID) &&
 698                     inject->have_auxtrace && !inject->itrace_synth_opts.set)
 699                         dsos__hit_all(session);
 700                 /*
 701                  * The AUX areas have been removed and replaced with
 702                  * synthesized hardware events, so clear the feature flag and
 703                  * remove the evsel.
 704                  */
 705                 if (inject->itrace_synth_opts.set) {
 706                         struct perf_evsel *evsel;
 707
 708                         perf_header__clear_feat(&session->header,
 709                                                 HEADER_AUXTRACE);
 710                         if (inject->itrace_synth_opts.last_branch)
 711                                 perf_header__set_feat(&session->header,
 712                                                       HEADER_BRANCH_STACK);
 713                         evsel = perf_evlist__id2evsel_strict(session->evlist,
 714                                                              inject->aux_id);
 715                         if (evsel) {
 716                                 pr_debug("Deleting %s\n",
 717                                          perf_evsel__name(evsel));
 718                                 perf_evlist__remove(session->evlist, evsel);
 719                                 perf_evsel__delete(evsel);
 720                         }
 721                         if (inject->strip)
 722                                 strip_fini(inject);
 723                 }
 724                 session->header.data_offset = output_data_offset;
 725                 session->header.data_size = inject->bytes_written;
 726                 perf_session__write_header(session, session->evlist, fd, true);
 727         }
 728
 729         return ret;
 730 }
 731
 732 int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
 733 {
 734         struct perf_inject inject = {
 735                 .tool = {
 736                         .sample         = perf_event__repipe_sample,
 737                         .mmap           = perf_event__repipe,
 738                         .mmap2          = perf_event__repipe,
 739                         .comm           = perf_event__repipe,
 740                         .fork           = perf_event__repipe,
 741                         .exit           = perf_event__repipe,
 742                         .lost           = perf_event__repipe,
 743                         .lost_samples   = perf_event__repipe,
 744                         .aux            = perf_event__repipe,
 745                         .itrace_start   = perf_event__repipe,
 746                         .context_switch = perf_event__repipe,
 747                         .read           = perf_event__repipe_sample,
 748                         .throttle       = perf_event__repipe,
 749                         .unthrottle     = perf_event__repipe,
 750                         .attr           = perf_event__repipe_attr,
 751                         .tracing_data   = perf_event__repipe_op2_synth,
 752                         .auxtrace_info  = perf_event__repipe_op2_synth,
 753                         .auxtrace       = perf_event__repipe_auxtrace,
 754                         .auxtrace_error = perf_event__repipe_op2_synth,
 755                         .finished_round = perf_event__repipe_oe_synth,
 756                         .build_id       = perf_event__repipe_op2_synth,
 757                         .id_index       = perf_event__repipe_op2_synth,
 758                 },
 759                 .input_name  = "-",
 760                 .samples = LIST_HEAD_INIT(inject.samples),
 761                 .output = {
 762                         .path = "-",
 763                         .mode = PERF_DATA_MODE_WRITE,
 764                 },
 765         };
 766         struct perf_data_file file = {
 767                 .mode = PERF_DATA_MODE_READ,
 768         };
 769         int ret;
 770
 771         struct option options[] = {
 772                 OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
 773                             "Inject build-ids into the output stream"),
 774                 OPT_STRING('i', "input", &inject.input_name, "file",
 775                            "input file name"),
 776                 OPT_STRING('o', "output", &inject.output.path, "file",
 777                            "output file name"),
 778                 OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
 779                             "Merge sched-stat and sched-switch for getting events "
 780                             "where and how long tasks slept"),
 781 #ifdef HAVE_JITDUMP
 782                 OPT_BOOLEAN('j', "jit", &inject.jit_mode, "merge jitdump files into perf.data file"),
 783 #endif
 784                 OPT_INCR('v', "verbose", &verbose,
 785                          "be more verbose (show build ids, etc)"),
 786                 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
 787                            "kallsyms pathname"),
 788                 OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
 789                 OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts,
 790                                     NULL, "opts", "Instruction Tracing options",
 791                                     itrace_parse_synth_opts),
 792                 OPT_BOOLEAN(0, "strip", &inject.strip,
 793                             "strip non-synthesized events (use with --itrace)"),
 794                 OPT_END()
 795         };
 796         const char * const inject_usage[] = {
 797                 "perf inject [<options>]",
 798                 NULL
 799         };
 800 #ifndef HAVE_JITDUMP
 801         set_option_nobuild(options, 'j', "jit", "NO_LIBELF=1", true);
 802 #endif
 803         argc = parse_options(argc, argv, options, inject_usage, 0);
 804
 805         /*
 806          * Any (unrecognized) arguments left?
 807          */
 808         if (argc)
 809                 usage_with_options(inject_usage, options);
 810
 811         if (inject.strip && !inject.itrace_synth_opts.set) {
 812                 pr_err("--strip option requires --itrace option\n");
 813                 return -1;
 814         }
 815
 816         if (perf_data_file__open(&inject.output)) {
 817                 perror("failed to create output file");
 818                 return -1;
 819         }
 820
 821         inject.tool.ordered_events = inject.sched_stat;
 822
 823         file.path = inject.input_name;
 824         inject.session = perf_session__new(&file, true, &inject.tool);
 825         if (inject.session == NULL)
 826                 return -1;
 827
 828         if (inject.build_ids) {
 829                 /*
 830                  * to make sure the mmap records are ordered correctly
 831                  * and so that the correct especially due to jitted code
 832                  * mmaps. We cannot generate the buildid hit list and
 833                  * inject the jit mmaps at the same time for now.
 834                  */
 835                 inject.tool.ordered_events = true;
 836                 inject.tool.ordering_requires_timestamps = true;
 837         }
 838 #ifdef HAVE_JITDUMP
 839         if (inject.jit_mode) {
 840                 inject.tool.mmap2          = perf_event__jit_repipe_mmap2;
 841                 inject.tool.mmap           = perf_event__jit_repipe_mmap;
 842                 inject.tool.ordered_events = true;
 843                 inject.tool.ordering_requires_timestamps = true;
 844                 /*
 845                  * JIT MMAP injection injects all MMAP events in one go, so it
 846                  * does not obey finished_round semantics.
 847                  */
 848                 inject.tool.finished_round = perf_event__drop_oe;
 849         }
 850 #endif
 851         ret = symbol__init(&inject.session->header.env);
 852         if (ret < 0)
 853                 goto out_delete;
 854
 855         ret = __cmd_inject(&inject);
 856
 857 out_delete:
 858         perf_session__delete(inject.session);
 859         return ret;
 860 }