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/vdso.h"
  14 #include "util/evlist.h"
  15 #include "util/evsel.h"
  16 #include "util/map.h"
  17 #include "util/session.h"
  18 #include "util/tool.h"
  19 #include "util/debug.h"
  20 #include "util/build-id.h"
  21 #include "util/data.h"
  22 #include "util/auxtrace.h"
  23 #include "util/jit.h"
  24 #include "util/symbol.h"
  25 #include "util/synthetic-events.h"
  26 #include "util/thread.h"
  27 #include "util/namespaces.h"
  28
  29 #include <linux/err.h>
  30 #include <subcmd/parse-options.h>
  31 #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
  32
  33 #include <linux/list.h>
  34 #include <linux/string.h>
  35 #include <errno.h>
  36 #include <signal.h>
  37
  38 struct perf_inject {
  39         struct perf_tool        tool;
  40         struct perf_session     *session;
  41         bool                    build_ids;
  42         bool                    build_id_all;
  43         bool                    sched_stat;
  44         bool                    have_auxtrace;
  45         bool                    strip;
  46         bool                    jit_mode;
  47         bool                    in_place_update;
  48         bool                    in_place_update_dry_run;
  49         const char              *input_name;
  50         struct perf_data        output;
  51         u64                     bytes_written;
  52         u64                     aux_id;
  53         struct list_head        samples;
  54         struct itrace_synth_opts itrace_synth_opts;
  55         char                    event_copy[PERF_SAMPLE_MAX_SIZE];
  56 };
  57
  58 struct event_entry {
  59         struct list_head node;
  60         u32              tid;
  61         union perf_event event[];
  62 };
  63
  64 static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
  65                                 struct machine *machine, u8 cpumode, u32 flags);
  66
  67 static int output_bytes(struct perf_inject *inject, void *buf, size_t sz)
  68 {
  69         ssize_t size;
  70
  71         size = perf_data__write(&inject->output, buf, sz);
  72         if (size < 0)
  73                 return -errno;
  74
  75         inject->bytes_written += size;
  76         return 0;
  77 }
  78
  79 static int perf_event__repipe_synth(struct perf_tool *tool,
  80                                     union perf_event *event)
  81 {
  82         struct perf_inject *inject = container_of(tool, struct perf_inject,
  83                                                   tool);
  84
  85         return output_bytes(inject, event, event->header.size);
  86 }
  87
  88 static int perf_event__repipe_oe_synth(struct perf_tool *tool,
  89                                        union perf_event *event,
  90                                        struct ordered_events *oe __maybe_unused)
  91 {
  92         return perf_event__repipe_synth(tool, event);
  93 }
  94
  95 #ifdef HAVE_JITDUMP
  96 static int perf_event__drop_oe(struct perf_tool *tool __maybe_unused,
  97                                union perf_event *event __maybe_unused,
  98                                struct ordered_events *oe __maybe_unused)
  99 {
 100         return 0;
 101 }
 102 #endif
 103
 104 static int perf_event__repipe_op2_synth(struct perf_session *session,
 105                                         union perf_event *event)
 106 {
 107         return perf_event__repipe_synth(session->tool, event);
 108 }
 109
 110 static int perf_event__repipe_op4_synth(struct perf_session *session,
 111                                         union perf_event *event,
 112                                         u64 data __maybe_unused)
 113 {
 114         return perf_event__repipe_synth(session->tool, event);
 115 }
 116
 117 static int perf_event__repipe_attr(struct perf_tool *tool,
 118                                    union perf_event *event,
 119                                    struct evlist **pevlist)
 120 {
 121         struct perf_inject *inject = container_of(tool, struct perf_inject,
 122                                                   tool);
 123         int ret;
 124
 125         ret = perf_event__process_attr(tool, event, pevlist);
 126         if (ret)
 127                 return ret;
 128
 129         if (!inject->output.is_pipe)
 130                 return 0;
 131
 132         return perf_event__repipe_synth(tool, event);
 133 }
 134
 135 static int perf_event__repipe_event_update(struct perf_tool *tool,
 136                                            union perf_event *event,
 137                                            struct evlist **pevlist __maybe_unused)
 138 {
 139         return perf_event__repipe_synth(tool, event);
 140 }
 141
 142 #ifdef HAVE_AUXTRACE_SUPPORT
 143
 144 static int copy_bytes(struct perf_inject *inject, int fd, off_t size)
 145 {
 146         char buf[4096];
 147         ssize_t ssz;
 148         int ret;
 149
 150         while (size > 0) {
 151                 ssz = read(fd, buf, min(size, (off_t)sizeof(buf)));
 152                 if (ssz < 0)
 153                         return -errno;
 154                 ret = output_bytes(inject, buf, ssz);
 155                 if (ret)
 156                         return ret;
 157                 size -= ssz;
 158         }
 159
 160         return 0;
 161 }
 162
 163 static s64 perf_event__repipe_auxtrace(struct perf_session *session,
 164                                        union perf_event *event)
 165 {
 166         struct perf_tool *tool = session->tool;
 167         struct perf_inject *inject = container_of(tool, struct perf_inject,
 168                                                   tool);
 169         int ret;
 170
 171         inject->have_auxtrace = true;
 172
 173         if (!inject->output.is_pipe) {
 174                 off_t offset;
 175
 176                 offset = lseek(inject->output.file.fd, 0, SEEK_CUR);
 177                 if (offset == -1)
 178                         return -errno;
 179                 ret = auxtrace_index__auxtrace_event(&session->auxtrace_index,
 180                                                      event, offset);
 181                 if (ret < 0)
 182                         return ret;
 183         }
 184
 185         if (perf_data__is_pipe(session->data) || !session->one_mmap) {
 186                 ret = output_bytes(inject, event, event->header.size);
 187                 if (ret < 0)
 188                         return ret;
 189                 ret = copy_bytes(inject, perf_data__fd(session->data),
 190                                  event->auxtrace.size);
 191         } else {
 192                 ret = output_bytes(inject, event,
 193                                    event->header.size + event->auxtrace.size);
 194         }
 195         if (ret < 0)
 196                 return ret;
 197
 198         return event->auxtrace.size;
 199 }
 200
 201 #else
 202
 203 static s64
 204 perf_event__repipe_auxtrace(struct perf_session *session __maybe_unused,
 205                             union perf_event *event __maybe_unused)
 206 {
 207         pr_err("AUX area tracing not supported\n");
 208         return -EINVAL;
 209 }
 210
 211 #endif
 212
 213 static int perf_event__repipe(struct perf_tool *tool,
 214                               union perf_event *event,
 215                               struct perf_sample *sample __maybe_unused,
 216                               struct machine *machine __maybe_unused)
 217 {
 218         return perf_event__repipe_synth(tool, event);
 219 }
 220
 221 static int perf_event__drop(struct perf_tool *tool __maybe_unused,
 222                             union perf_event *event __maybe_unused,
 223                             struct perf_sample *sample __maybe_unused,
 224                             struct machine *machine __maybe_unused)
 225 {
 226         return 0;
 227 }
 228
 229 static int perf_event__drop_aux(struct perf_tool *tool,
 230                                 union perf_event *event __maybe_unused,
 231                                 struct perf_sample *sample,
 232                                 struct machine *machine __maybe_unused)
 233 {
 234         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 235
 236         if (!inject->aux_id)
 237                 inject->aux_id = sample->id;
 238
 239         return 0;
 240 }
 241
 242 static union perf_event *
 243 perf_inject__cut_auxtrace_sample(struct perf_inject *inject,
 244                                  union perf_event *event,
 245                                  struct perf_sample *sample)
 246 {
 247         size_t sz1 = sample->aux_sample.data - (void *)event;
 248         size_t sz2 = event->header.size - sample->aux_sample.size - sz1;
 249         union perf_event *ev = (union perf_event *)inject->event_copy;
 250
 251         if (sz1 > event->header.size || sz2 > event->header.size ||
 252             sz1 + sz2 > event->header.size ||
 253             sz1 < sizeof(struct perf_event_header) + sizeof(u64))
 254                 return event;
 255
 256         memcpy(ev, event, sz1);
 257         memcpy((void *)ev + sz1, (void *)event + event->header.size - sz2, sz2);
 258         ev->header.size = sz1 + sz2;
 259         ((u64 *)((void *)ev + sz1))[-1] = 0;
 260
 261         return ev;
 262 }
 263
 264 typedef int (*inject_handler)(struct perf_tool *tool,
 265                               union perf_event *event,
 266                               struct perf_sample *sample,
 267                               struct evsel *evsel,
 268                               struct machine *machine);
 269
 270 static int perf_event__repipe_sample(struct perf_tool *tool,
 271                                      union perf_event *event,
 272                                      struct perf_sample *sample,
 273                                      struct evsel *evsel,
 274                                      struct machine *machine)
 275 {
 276         struct perf_inject *inject = container_of(tool, struct perf_inject,
 277                                                   tool);
 278
 279         if (evsel && evsel->handler) {
 280                 inject_handler f = evsel->handler;
 281                 return f(tool, event, sample, evsel, machine);
 282         }
 283
 284         build_id__mark_dso_hit(tool, event, sample, evsel, machine);
 285
 286         if (inject->itrace_synth_opts.set && sample->aux_sample.size)
 287                 event = perf_inject__cut_auxtrace_sample(inject, event, sample);
 288
 289         return perf_event__repipe_synth(tool, event);
 290 }
 291
 292 static int perf_event__repipe_mmap(struct perf_tool *tool,
 293                                    union perf_event *event,
 294                                    struct perf_sample *sample,
 295                                    struct machine *machine)
 296 {
 297         int err;
 298
 299         err = perf_event__process_mmap(tool, event, sample, machine);
 300         perf_event__repipe(tool, event, sample, machine);
 301
 302         return err;
 303 }
 304
 305 #ifdef HAVE_JITDUMP
 306 static int perf_event__jit_repipe_mmap(struct perf_tool *tool,
 307                                        union perf_event *event,
 308                                        struct perf_sample *sample,
 309                                        struct machine *machine)
 310 {
 311         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 312         u64 n = 0;
 313         int ret;
 314
 315         /*
 316          * if jit marker, then inject jit mmaps and generate ELF images
 317          */
 318         ret = jit_process(inject->session, &inject->output, machine,
 319                           event->mmap.filename, event->mmap.pid, event->mmap.tid, &n);
 320         if (ret < 0)
 321                 return ret;
 322         if (ret) {
 323                 inject->bytes_written += n;
 324                 return 0;
 325         }
 326         return perf_event__repipe_mmap(tool, event, sample, machine);
 327 }
 328 #endif
 329
 330 static struct dso *findnew_dso(int pid, int tid, const char *filename,
 331                                struct dso_id *id, struct machine *machine)
 332 {
 333         struct thread *thread;
 334         struct nsinfo *nsi = NULL;
 335         struct nsinfo *nnsi;
 336         struct dso *dso;
 337         bool vdso;
 338
 339         thread = machine__findnew_thread(machine, pid, tid);
 340         if (thread == NULL) {
 341                 pr_err("cannot find or create a task %d/%d.\n", tid, pid);
 342                 return NULL;
 343         }
 344
 345         vdso = is_vdso_map(filename);
 346         nsi = nsinfo__get(thread->nsinfo);
 347
 348         if (vdso) {
 349                 /* The vdso maps are always on the host and not the
 350                  * container.  Ensure that we don't use setns to look
 351                  * them up.
 352                  */
 353                 nnsi = nsinfo__copy(nsi);
 354                 if (nnsi) {
 355                         nsinfo__put(nsi);
 356                         nnsi->need_setns = false;
 357                         nsi = nnsi;
 358                 }
 359                 dso = machine__findnew_vdso(machine, thread);
 360         } else {
 361                 dso = machine__findnew_dso_id(machine, filename, id);
 362         }
 363
 364         if (dso)
 365                 dso->nsinfo = nsi;
 366         else
 367                 nsinfo__put(nsi);
 368
 369         thread__put(thread);
 370         return dso;
 371 }
 372
 373 static int perf_event__repipe_buildid_mmap(struct perf_tool *tool,
 374                                            union perf_event *event,
 375                                            struct perf_sample *sample,
 376                                            struct machine *machine)
 377 {
 378         struct dso *dso;
 379
 380         dso = findnew_dso(event->mmap.pid, event->mmap.tid,
 381                           event->mmap.filename, NULL, machine);
 382
 383         if (dso && !dso->hit) {
 384                 dso->hit = 1;
 385                 dso__inject_build_id(dso, tool, machine, sample->cpumode, 0);
 386         }
 387         dso__put(dso);
 388
 389         return perf_event__repipe(tool, event, sample, machine);
 390 }
 391
 392 static int perf_event__repipe_mmap2(struct perf_tool *tool,
 393                                    union perf_event *event,
 394                                    struct perf_sample *sample,
 395                                    struct machine *machine)
 396 {
 397         int err;
 398
 399         err = perf_event__process_mmap2(tool, event, sample, machine);
 400         perf_event__repipe(tool, event, sample, machine);
 401
 402         if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) {
 403                 struct dso *dso;
 404
 405                 dso = findnew_dso(event->mmap2.pid, event->mmap2.tid,
 406                                   event->mmap2.filename, NULL, machine);
 407                 if (dso) {
 408                         /* mark it not to inject build-id */
 409                         dso->hit = 1;
 410                 }
 411                 dso__put(dso);
 412         }
 413
 414         return err;
 415 }
 416
 417 #ifdef HAVE_JITDUMP
 418 static int perf_event__jit_repipe_mmap2(struct perf_tool *tool,
 419                                         union perf_event *event,
 420                                         struct perf_sample *sample,
 421                                         struct machine *machine)
 422 {
 423         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 424         u64 n = 0;
 425         int ret;
 426
 427         /*
 428          * if jit marker, then inject jit mmaps and generate ELF images
 429          */
 430         ret = jit_process(inject->session, &inject->output, machine,
 431                           event->mmap2.filename, event->mmap2.pid, event->mmap2.tid, &n);
 432         if (ret < 0)
 433                 return ret;
 434         if (ret) {
 435                 inject->bytes_written += n;
 436                 return 0;
 437         }
 438         return perf_event__repipe_mmap2(tool, event, sample, machine);
 439 }
 440 #endif
 441
 442 static int perf_event__repipe_buildid_mmap2(struct perf_tool *tool,
 443                                             union perf_event *event,
 444                                             struct perf_sample *sample,
 445                                             struct machine *machine)
 446 {
 447         struct dso_id dso_id = {
 448                 .maj = event->mmap2.maj,
 449                 .min = event->mmap2.min,
 450                 .ino = event->mmap2.ino,
 451                 .ino_generation = event->mmap2.ino_generation,
 452         };
 453         struct dso *dso;
 454
 455         if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) {
 456                 /* cannot use dso_id since it'd have invalid info */
 457                 dso = findnew_dso(event->mmap2.pid, event->mmap2.tid,
 458                                   event->mmap2.filename, NULL, machine);
 459                 if (dso) {
 460                         /* mark it not to inject build-id */
 461                         dso->hit = 1;
 462                 }
 463                 dso__put(dso);
 464                 return 0;
 465         }
 466
 467         dso = findnew_dso(event->mmap2.pid, event->mmap2.tid,
 468                           event->mmap2.filename, &dso_id, machine);
 469
 470         if (dso && !dso->hit) {
 471                 dso->hit = 1;
 472                 dso__inject_build_id(dso, tool, machine, sample->cpumode,
 473                                      event->mmap2.flags);
 474         }
 475         dso__put(dso);
 476
 477         perf_event__repipe(tool, event, sample, machine);
 478
 479         return 0;
 480 }
 481
 482 static int perf_event__repipe_fork(struct perf_tool *tool,
 483                                    union perf_event *event,
 484                                    struct perf_sample *sample,
 485                                    struct machine *machine)
 486 {
 487         int err;
 488
 489         err = perf_event__process_fork(tool, event, sample, machine);
 490         perf_event__repipe(tool, event, sample, machine);
 491
 492         return err;
 493 }
 494
 495 static int perf_event__repipe_comm(struct perf_tool *tool,
 496                                    union perf_event *event,
 497                                    struct perf_sample *sample,
 498                                    struct machine *machine)
 499 {
 500         int err;
 501
 502         err = perf_event__process_comm(tool, event, sample, machine);
 503         perf_event__repipe(tool, event, sample, machine);
 504
 505         return err;
 506 }
 507
 508 static int perf_event__repipe_namespaces(struct perf_tool *tool,
 509                                          union perf_event *event,
 510                                          struct perf_sample *sample,
 511                                          struct machine *machine)
 512 {
 513         int err = perf_event__process_namespaces(tool, event, sample, machine);
 514
 515         perf_event__repipe(tool, event, sample, machine);
 516
 517         return err;
 518 }
 519
 520 static int perf_event__repipe_exit(struct perf_tool *tool,
 521                                    union perf_event *event,
 522                                    struct perf_sample *sample,
 523                                    struct machine *machine)
 524 {
 525         int err;
 526
 527         err = perf_event__process_exit(tool, event, sample, machine);
 528         perf_event__repipe(tool, event, sample, machine);
 529
 530         return err;
 531 }
 532
 533 static int perf_event__repipe_tracing_data(struct perf_session *session,
 534                                            union perf_event *event)
 535 {
 536         int err;
 537
 538         perf_event__repipe_synth(session->tool, event);
 539         err = perf_event__process_tracing_data(session, event);
 540
 541         return err;
 542 }
 543
 544 static int dso__read_build_id(struct dso *dso)
 545 {
 546         struct nscookie nsc;
 547
 548         if (dso->has_build_id)
 549                 return 0;
 550
 551         nsinfo__mountns_enter(dso->nsinfo, &nsc);
 552         if (filename__read_build_id(dso->long_name, &dso->bid) > 0)
 553                 dso->has_build_id = true;
 554         nsinfo__mountns_exit(&nsc);
 555
 556         return dso->has_build_id ? 0 : -1;
 557 }
 558
 559 static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
 560                                 struct machine *machine, u8 cpumode, u32 flags)
 561 {
 562         int err;
 563
 564         if (is_anon_memory(dso->long_name) || flags & MAP_HUGETLB)
 565                 return 0;
 566         if (is_no_dso_memory(dso->long_name))
 567                 return 0;
 568
 569         if (dso__read_build_id(dso) < 0) {
 570                 pr_debug("no build_id found for %s\n", dso->long_name);
 571                 return -1;
 572         }
 573
 574         err = perf_event__synthesize_build_id(tool, dso, cpumode,
 575                                               perf_event__repipe, machine);
 576         if (err) {
 577                 pr_err("Can't synthesize build_id event for %s\n", dso->long_name);
 578                 return -1;
 579         }
 580
 581         return 0;
 582 }
 583
 584 int perf_event__inject_buildid(struct perf_tool *tool, union perf_event *event,
 585                                struct perf_sample *sample,
 586                                struct evsel *evsel __maybe_unused,
 587                                struct machine *machine)
 588 {
 589         struct addr_location al;
 590         struct thread *thread;
 591
 592         thread = machine__findnew_thread(machine, sample->pid, sample->tid);
 593         if (thread == NULL) {
 594                 pr_err("problem processing %d event, skipping it.\n",
 595                        event->header.type);
 596                 goto repipe;
 597         }
 598
 599         if (thread__find_map(thread, sample->cpumode, sample->ip, &al)) {
 600                 if (!al.map->dso->hit) {
 601                         al.map->dso->hit = 1;
 602                         dso__inject_build_id(al.map->dso, tool, machine,
 603                                              sample->cpumode, al.map->flags);
 604                 }
 605         }
 606
 607         thread__put(thread);
 608 repipe:
 609         perf_event__repipe(tool, event, sample, machine);
 610         return 0;
 611 }
 612
 613 static int perf_inject__sched_process_exit(struct perf_tool *tool,
 614                                            union perf_event *event __maybe_unused,
 615                                            struct perf_sample *sample,
 616                                            struct evsel *evsel __maybe_unused,
 617                                            struct machine *machine __maybe_unused)
 618 {
 619         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 620         struct event_entry *ent;
 621
 622         list_for_each_entry(ent, &inject->samples, node) {
 623                 if (sample->tid == ent->tid) {
 624                         list_del_init(&ent->node);
 625                         free(ent);
 626                         break;
 627                 }
 628         }
 629
 630         return 0;
 631 }
 632
 633 static int perf_inject__sched_switch(struct perf_tool *tool,
 634                                      union perf_event *event,
 635                                      struct perf_sample *sample,
 636                                      struct evsel *evsel,
 637                                      struct machine *machine)
 638 {
 639         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 640         struct event_entry *ent;
 641
 642         perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
 643
 644         ent = malloc(event->header.size + sizeof(struct event_entry));
 645         if (ent == NULL) {
 646                 color_fprintf(stderr, PERF_COLOR_RED,
 647                              "Not enough memory to process sched switch event!");
 648                 return -1;
 649         }
 650
 651         ent->tid = sample->tid;
 652         memcpy(&ent->event, event, event->header.size);
 653         list_add(&ent->node, &inject->samples);
 654         return 0;
 655 }
 656
 657 static int perf_inject__sched_stat(struct perf_tool *tool,
 658                                    union perf_event *event __maybe_unused,
 659                                    struct perf_sample *sample,
 660                                    struct evsel *evsel,
 661                                    struct machine *machine)
 662 {
 663         struct event_entry *ent;
 664         union perf_event *event_sw;
 665         struct perf_sample sample_sw;
 666         struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
 667         u32 pid = evsel__intval(evsel, sample, "pid");
 668
 669         list_for_each_entry(ent, &inject->samples, node) {
 670                 if (pid == ent->tid)
 671                         goto found;
 672         }
 673
 674         return 0;
 675 found:
 676         event_sw = &ent->event[0];
 677         evsel__parse_sample(evsel, event_sw, &sample_sw);
 678
 679         sample_sw.period = sample->period;
 680         sample_sw.time   = sample->time;
 681         perf_event__synthesize_sample(event_sw, evsel->core.attr.sample_type,
 682                                       evsel->core.attr.read_format, &sample_sw);
 683         build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
 684         return perf_event__repipe(tool, event_sw, &sample_sw, machine);
 685 }
 686
 687 static void sig_handler(int sig __maybe_unused)
 688 {
 689         session_done = 1;
 690 }
 691
 692 static int evsel__check_stype(struct evsel *evsel, u64 sample_type, const char *sample_msg)
 693 {
 694         struct perf_event_attr *attr = &evsel->core.attr;
 695         const char *name = evsel__name(evsel);
 696
 697         if (!(attr->sample_type & sample_type)) {
 698                 pr_err("Samples for %s event do not have %s attribute set.",
 699                         name, sample_msg);
 700                 return -EINVAL;
 701         }
 702
 703         return 0;
 704 }
 705
 706 static int drop_sample(struct perf_tool *tool __maybe_unused,
 707                        union perf_event *event __maybe_unused,
 708                        struct perf_sample *sample __maybe_unused,
 709                        struct evsel *evsel __maybe_unused,
 710                        struct machine *machine __maybe_unused)
 711 {
 712         return 0;
 713 }
 714
 715 static void strip_init(struct perf_inject *inject)
 716 {
 717         struct evlist *evlist = inject->session->evlist;
 718         struct evsel *evsel;
 719
 720         inject->tool.context_switch = perf_event__drop;
 721
 722         evlist__for_each_entry(evlist, evsel)
 723                 evsel->handler = drop_sample;
 724 }
 725
 726 static int parse_vm_time_correlation(const struct option *opt, const char *str, int unset)
 727 {
 728         struct perf_inject *inject = opt->value;
 729         const char *args;
 730         char *dry_run;
 731
 732         if (unset)
 733                 return 0;
 734
 735         inject->itrace_synth_opts.set = true;
 736         inject->itrace_synth_opts.vm_time_correlation = true;
 737         inject->in_place_update = true;
 738
 739         if (!str)
 740                 return 0;
 741
 742         dry_run = skip_spaces(str);
 743         if (!strncmp(dry_run, "dry-run", strlen("dry-run"))) {
 744                 inject->itrace_synth_opts.vm_tm_corr_dry_run = true;
 745                 inject->in_place_update_dry_run = true;
 746                 args = dry_run + strlen("dry-run");
 747         } else {
 748                 args = str;
 749         }
 750
 751         inject->itrace_synth_opts.vm_tm_corr_args = strdup(args);
 752
 753         return inject->itrace_synth_opts.vm_tm_corr_args ? 0 : -ENOMEM;
 754 }
 755
 756 static int __cmd_inject(struct perf_inject *inject)
 757 {
 758         int ret = -EINVAL;
 759         struct perf_session *session = inject->session;
 760         struct perf_data *data_out = &inject->output;
 761         int fd = inject->in_place_update ? -1 : perf_data__fd(data_out);
 762         u64 output_data_offset;
 763
 764         signal(SIGINT, sig_handler);
 765
 766         if (inject->build_ids || inject->sched_stat ||
 767             inject->itrace_synth_opts.set || inject->build_id_all) {
 768                 inject->tool.mmap         = perf_event__repipe_mmap;
 769                 inject->tool.mmap2        = perf_event__repipe_mmap2;
 770                 inject->tool.fork         = perf_event__repipe_fork;
 771                 inject->tool.tracing_data = perf_event__repipe_tracing_data;
 772         }
 773
 774         output_data_offset = session->header.data_offset;
 775
 776         if (inject->build_id_all) {
 777                 inject->tool.mmap         = perf_event__repipe_buildid_mmap;
 778                 inject->tool.mmap2        = perf_event__repipe_buildid_mmap2;
 779         } else if (inject->build_ids) {
 780                 inject->tool.sample = perf_event__inject_buildid;
 781         } else if (inject->sched_stat) {
 782                 struct evsel *evsel;
 783
 784                 evlist__for_each_entry(session->evlist, evsel) {
 785                         const char *name = evsel__name(evsel);
 786
 787                         if (!strcmp(name, "sched:sched_switch")) {
 788                                 if (evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
 789                                         return -EINVAL;
 790
 791                                 evsel->handler = perf_inject__sched_switch;
 792                         } else if (!strcmp(name, "sched:sched_process_exit"))
 793                                 evsel->handler = perf_inject__sched_process_exit;
 794                         else if (!strncmp(name, "sched:sched_stat_", 17))
 795                                 evsel->handler = perf_inject__sched_stat;
 796                 }
 797         } else if (inject->itrace_synth_opts.vm_time_correlation) {
 798                 session->itrace_synth_opts = &inject->itrace_synth_opts;
 799                 memset(&inject->tool, 0, sizeof(inject->tool));
 800                 inject->tool.id_index       = perf_event__process_id_index;
 801                 inject->tool.auxtrace_info  = perf_event__process_auxtrace_info;
 802                 inject->tool.auxtrace       = perf_event__process_auxtrace;
 803                 inject->tool.auxtrace_error = perf_event__process_auxtrace_error;
 804                 inject->tool.ordered_events = true;
 805                 inject->tool.ordering_requires_timestamps = true;
 806         } else if (inject->itrace_synth_opts.set) {
 807                 session->itrace_synth_opts = &inject->itrace_synth_opts;
 808                 inject->itrace_synth_opts.inject = true;
 809                 inject->tool.comm           = perf_event__repipe_comm;
 810                 inject->tool.namespaces     = perf_event__repipe_namespaces;
 811                 inject->tool.exit           = perf_event__repipe_exit;
 812                 inject->tool.id_index       = perf_event__process_id_index;
 813                 inject->tool.auxtrace_info  = perf_event__process_auxtrace_info;
 814                 inject->tool.auxtrace       = perf_event__process_auxtrace;
 815                 inject->tool.aux            = perf_event__drop_aux;
 816                 inject->tool.itrace_start   = perf_event__drop_aux,
 817                 inject->tool.ordered_events = true;
 818                 inject->tool.ordering_requires_timestamps = true;
 819                 /* Allow space in the header for new attributes */
 820                 output_data_offset = 4096;
 821                 if (inject->strip)
 822                         strip_init(inject);
 823         }
 824
 825         if (!inject->itrace_synth_opts.set)
 826                 auxtrace_index__free(&session->auxtrace_index);
 827
 828         if (!data_out->is_pipe && !inject->in_place_update)
 829                 lseek(fd, output_data_offset, SEEK_SET);
 830
 831         ret = perf_session__process_events(session);
 832         if (ret)
 833                 return ret;
 834
 835         if (!data_out->is_pipe && !inject->in_place_update) {
 836                 if (inject->build_ids)
 837                         perf_header__set_feat(&session->header,
 838                                               HEADER_BUILD_ID);
 839                 /*
 840                  * Keep all buildids when there is unprocessed AUX data because
 841                  * it is not known which ones the AUX trace hits.
 842                  */
 843                 if (perf_header__has_feat(&session->header, HEADER_BUILD_ID) &&
 844                     inject->have_auxtrace && !inject->itrace_synth_opts.set)
 845                         dsos__hit_all(session);
 846                 /*
 847                  * The AUX areas have been removed and replaced with
 848                  * synthesized hardware events, so clear the feature flag.
 849                  */
 850                 if (inject->itrace_synth_opts.set) {
 851                         perf_header__clear_feat(&session->header,
 852                                                 HEADER_AUXTRACE);
 853                         if (inject->itrace_synth_opts.last_branch ||
 854                             inject->itrace_synth_opts.add_last_branch)
 855                                 perf_header__set_feat(&session->header,
 856                                                       HEADER_BRANCH_STACK);
 857                 }
 858                 session->header.data_offset = output_data_offset;
 859                 session->header.data_size = inject->bytes_written;
 860                 perf_session__write_header(session, session->evlist, fd, true);
 861         }
 862
 863         return ret;
 864 }
 865
 866 int cmd_inject(int argc, const char **argv)
 867 {
 868         struct perf_inject inject = {
 869                 .tool = {
 870                         .sample         = perf_event__repipe_sample,
 871                         .read           = perf_event__repipe_sample,
 872                         .mmap           = perf_event__repipe,
 873                         .mmap2          = perf_event__repipe,
 874                         .comm           = perf_event__repipe,
 875                         .namespaces     = perf_event__repipe,
 876                         .cgroup         = perf_event__repipe,
 877                         .fork           = perf_event__repipe,
 878                         .exit           = perf_event__repipe,
 879                         .lost           = perf_event__repipe,
 880                         .lost_samples   = perf_event__repipe,
 881                         .aux            = perf_event__repipe,
 882                         .itrace_start   = perf_event__repipe,
 883                         .context_switch = perf_event__repipe,
 884                         .throttle       = perf_event__repipe,
 885                         .unthrottle     = perf_event__repipe,
 886                         .ksymbol        = perf_event__repipe,
 887                         .bpf            = perf_event__repipe,
 888                         .text_poke      = perf_event__repipe,
 889                         .attr           = perf_event__repipe_attr,
 890                         .event_update   = perf_event__repipe_event_update,
 891                         .tracing_data   = perf_event__repipe_op2_synth,
 892                         .finished_round = perf_event__repipe_oe_synth,
 893                         .build_id       = perf_event__repipe_op2_synth,
 894                         .id_index       = perf_event__repipe_op2_synth,
 895                         .auxtrace_info  = perf_event__repipe_op2_synth,
 896                         .auxtrace_error = perf_event__repipe_op2_synth,
 897                         .time_conv      = perf_event__repipe_op2_synth,
 898                         .thread_map     = perf_event__repipe_op2_synth,
 899                         .cpu_map        = perf_event__repipe_op2_synth,
 900                         .stat_config    = perf_event__repipe_op2_synth,
 901                         .stat           = perf_event__repipe_op2_synth,
 902                         .stat_round     = perf_event__repipe_op2_synth,
 903                         .feature        = perf_event__repipe_op2_synth,
 904                         .compressed     = perf_event__repipe_op4_synth,
 905                         .auxtrace       = perf_event__repipe_auxtrace,
 906                 },
 907                 .input_name  = "-",
 908                 .samples = LIST_HEAD_INIT(inject.samples),
 909                 .output = {
 910                         .path = "-",
 911                         .mode = PERF_DATA_MODE_WRITE,
 912                         .use_stdio = true,
 913                 },
 914         };
 915         struct perf_data data = {
 916                 .mode = PERF_DATA_MODE_READ,
 917                 .use_stdio = true,
 918         };
 919         int ret;
 920
 921         struct option options[] = {
 922                 OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
 923                             "Inject build-ids into the output stream"),
 924                 OPT_BOOLEAN(0, "buildid-all", &inject.build_id_all,
 925                             "Inject build-ids of all DSOs into the output stream"),
 926                 OPT_STRING('i', "input", &inject.input_name, "file",
 927                            "input file name"),
 928                 OPT_STRING('o', "output", &inject.output.path, "file",
 929                            "output file name"),
 930                 OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
 931                             "Merge sched-stat and sched-switch for getting events "
 932                             "where and how long tasks slept"),
 933 #ifdef HAVE_JITDUMP
 934                 OPT_BOOLEAN('j', "jit", &inject.jit_mode, "merge jitdump files into perf.data file"),
 935 #endif
 936                 OPT_INCR('v', "verbose", &verbose,
 937                          "be more verbose (show build ids, etc)"),
 938                 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
 939                            "kallsyms pathname"),
 940                 OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"),
 941                 OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts,
 942                                     NULL, "opts", "Instruction Tracing options\n"
 943                                     ITRACE_HELP,
 944                                     itrace_parse_synth_opts),
 945                 OPT_BOOLEAN(0, "strip", &inject.strip,
 946                             "strip non-synthesized events (use with --itrace)"),
 947                 OPT_CALLBACK_OPTARG(0, "vm-time-correlation", &inject, NULL, "opts",
 948                                     "correlate time between VM guests and the host",
 949                                     parse_vm_time_correlation),
 950                 OPT_END()
 951         };
 952         const char * const inject_usage[] = {
 953                 "perf inject [<options>]",
 954                 NULL
 955         };
 956 #ifndef HAVE_JITDUMP
 957         set_option_nobuild(options, 'j', "jit", "NO_LIBELF=1", true);
 958 #endif
 959         argc = parse_options(argc, argv, options, inject_usage, 0);
 960
 961         /*
 962          * Any (unrecognized) arguments left?
 963          */
 964         if (argc)
 965                 usage_with_options(inject_usage, options);
 966
 967         if (inject.strip && !inject.itrace_synth_opts.set) {
 968                 pr_err("--strip option requires --itrace option\n");
 969                 return -1;
 970         }
 971
 972         if (inject.in_place_update) {
 973                 if (!strcmp(inject.input_name, "-")) {
 974                         pr_err("Input file name required for in-place updating\n");
 975                         return -1;
 976                 }
 977                 if (strcmp(inject.output.path, "-")) {
 978                         pr_err("Output file name must not be specified for in-place updating\n");
 979                         return -1;
 980                 }
 981                 if (!data.force && !inject.in_place_update_dry_run) {
 982                         pr_err("The input file would be updated in place, "
 983                                 "the --force option is required.\n");
 984                         return -1;
 985                 }
 986                 if (!inject.in_place_update_dry_run)
 987                         data.in_place_update = true;
 988         } else if (perf_data__open(&inject.output)) {
 989                 perror("failed to create output file");
 990                 return -1;
 991         }
 992
 993         data.path = inject.input_name;
 994         inject.session = perf_session__new(&data, inject.output.is_pipe, &inject.tool);
 995         if (IS_ERR(inject.session))
 996                 return PTR_ERR(inject.session);
 997
 998         if (zstd_init(&(inject.session->zstd_data), 0) < 0)
 999                 pr_warning("Decompression initialization failed.\n");
1000
1001         if (inject.build_ids && !inject.build_id_all) {
1002                 /*
1003                  * to make sure the mmap records are ordered correctly
1004                  * and so that the correct especially due to jitted code
1005                  * mmaps. We cannot generate the buildid hit list and
1006                  * inject the jit mmaps at the same time for now.
1007                  */
1008                 inject.tool.ordered_events = true;
1009                 inject.tool.ordering_requires_timestamps = true;
1010         }
1011
1012         if (inject.sched_stat) {
1013                 inject.tool.ordered_events = true;
1014         }
1015
1016 #ifdef HAVE_JITDUMP
1017         if (inject.jit_mode) {
1018                 inject.tool.mmap2          = perf_event__jit_repipe_mmap2;
1019                 inject.tool.mmap           = perf_event__jit_repipe_mmap;
1020                 inject.tool.ordered_events = true;
1021                 inject.tool.ordering_requires_timestamps = true;
1022                 /*
1023                  * JIT MMAP injection injects all MMAP events in one go, so it
1024                  * does not obey finished_round semantics.
1025                  */
1026                 inject.tool.finished_round = perf_event__drop_oe;
1027         }
1028 #endif
1029         ret = symbol__init(&inject.session->header.env);
1030         if (ret < 0)
1031                 goto out_delete;
1032
1033         ret = __cmd_inject(&inject);
1034
1035 out_delete:
1036         zstd_fini(&(inject.session->zstd_data));
1037         perf_session__delete(inject.session);
1038         free(inject.itrace_synth_opts.vm_tm_corr_args);
1039         return ret;
1040 }