tools/perf/util/session.c

   1 #include <linux/kernel.h>
   2 #include <traceevent/event-parse.h>
   3
   4 #include <byteswap.h>
   5 #include <unistd.h>
   6 #include <sys/types.h>
   7 #include <sys/mman.h>
   8
   9 #include "evlist.h"
  10 #include "evsel.h"
  11 #include "session.h"
  12 #include "tool.h"
  13 #include "sort.h"
  14 #include "util.h"
  15 #include "cpumap.h"
  16 #include "perf_regs.h"
  17 #include "asm/bug.h"
  18 #include "auxtrace.h"
  19 #include "thread-stack.h"
  20
  21 static int perf_session__deliver_event(struct perf_session *session,
  22                                        union perf_event *event,
  23                                        struct perf_sample *sample,
  24                                        struct perf_tool *tool,
  25                                        u64 file_offset);
  26
  27 static int perf_session__open(struct perf_session *session)
  28 {
  29         struct perf_data_file *file = session->file;
  30
  31         if (perf_session__read_header(session) < 0) {
  32                 pr_err("incompatible file format (rerun with -v to learn more)");
  33                 return -1;
  34         }
  35
  36         if (perf_data_file__is_pipe(file))
  37                 return 0;
  38
  39         if (!perf_evlist__valid_sample_type(session->evlist)) {
  40                 pr_err("non matching sample_type");
  41                 return -1;
  42         }
  43
  44         if (!perf_evlist__valid_sample_id_all(session->evlist)) {
  45                 pr_err("non matching sample_id_all");
  46                 return -1;
  47         }
  48
  49         if (!perf_evlist__valid_read_format(session->evlist)) {
  50                 pr_err("non matching read_format");
  51                 return -1;
  52         }
  53
  54         return 0;
  55 }
  56
  57 void perf_session__set_id_hdr_size(struct perf_session *session)
  58 {
  59         u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
  60
  61         machines__set_id_hdr_size(&session->machines, id_hdr_size);
  62 }
  63
  64 int perf_session__create_kernel_maps(struct perf_session *session)
  65 {
  66         int ret = machine__create_kernel_maps(&session->machines.host);
  67
  68         if (ret >= 0)
  69                 ret = machines__create_guest_kernel_maps(&session->machines);
  70         return ret;
  71 }
  72
  73 static void perf_session__destroy_kernel_maps(struct perf_session *session)
  74 {
  75         machines__destroy_kernel_maps(&session->machines);
  76 }
  77
  78 static bool perf_session__has_comm_exec(struct perf_session *session)
  79 {
  80         struct perf_evsel *evsel;
  81
  82         evlist__for_each(session->evlist, evsel) {
  83                 if (evsel->attr.comm_exec)
  84                         return true;
  85         }
  86
  87         return false;
  88 }
  89
  90 static void perf_session__set_comm_exec(struct perf_session *session)
  91 {
  92         bool comm_exec = perf_session__has_comm_exec(session);
  93
  94         machines__set_comm_exec(&session->machines, comm_exec);
  95 }
  96
  97 static int ordered_events__deliver_event(struct ordered_events *oe,
  98                                          struct ordered_event *event)
  99 {
 100         struct perf_sample sample;
 101         struct perf_session *session = container_of(oe, struct perf_session,
 102                                                     ordered_events);
 103         int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
 104
 105         if (ret) {
 106                 pr_err("Can't parse sample, err = %d\n", ret);
 107                 return ret;
 108         }
 109
 110         return perf_session__deliver_event(session, event->event, &sample,
 111                                            session->tool, event->file_offset);
 112 }
 113
 114 struct perf_session *perf_session__new(struct perf_data_file *file,
 115                                        bool repipe, struct perf_tool *tool)
 116 {
 117         struct perf_session *session = zalloc(sizeof(*session));
 118
 119         if (!session)
 120                 goto out;
 121
 122         session->repipe = repipe;
 123         session->tool   = tool;
 124         INIT_LIST_HEAD(&session->auxtrace_index);
 125         machines__init(&session->machines);
 126         ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
 127
 128         if (file) {
 129                 if (perf_data_file__open(file))
 130                         goto out_delete;
 131
 132                 session->file = file;
 133
 134                 if (perf_data_file__is_read(file)) {
 135                         if (perf_session__open(session) < 0)
 136                                 goto out_close;
 137
 138                         perf_session__set_id_hdr_size(session);
 139                         perf_session__set_comm_exec(session);
 140                 }
 141         }
 142
 143         if (!file || perf_data_file__is_write(file)) {
 144                 /*
 145                  * In O_RDONLY mode this will be performed when reading the
 146                  * kernel MMAP event, in perf_event__process_mmap().
 147                  */
 148                 if (perf_session__create_kernel_maps(session) < 0)
 149                         pr_warning("Cannot read kernel map\n");
 150         }
 151
 152         if (tool && tool->ordering_requires_timestamps &&
 153             tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
 154                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 155                 tool->ordered_events = false;
 156         }
 157
 158         return session;
 159
 160  out_close:
 161         perf_data_file__close(file);
 162  out_delete:
 163         perf_session__delete(session);
 164  out:
 165         return NULL;
 166 }
 167
 168 static void perf_session__delete_threads(struct perf_session *session)
 169 {
 170         machine__delete_threads(&session->machines.host);
 171 }
 172
 173 static void perf_session_env__delete(struct perf_session_env *env)
 174 {
 175         zfree(&env->hostname);
 176         zfree(&env->os_release);
 177         zfree(&env->version);
 178         zfree(&env->arch);
 179         zfree(&env->cpu_desc);
 180         zfree(&env->cpuid);
 181
 182         zfree(&env->cmdline);
 183         zfree(&env->sibling_cores);
 184         zfree(&env->sibling_threads);
 185         zfree(&env->numa_nodes);
 186         zfree(&env->pmu_mappings);
 187 }
 188
 189 void perf_session__delete(struct perf_session *session)
 190 {
 191         auxtrace__free(session);
 192         auxtrace_index__free(&session->auxtrace_index);
 193         perf_session__destroy_kernel_maps(session);
 194         perf_session__delete_threads(session);
 195         perf_session_env__delete(&session->header.env);
 196         machines__exit(&session->machines);
 197         if (session->file)
 198                 perf_data_file__close(session->file);
 199         free(session);
 200 }
 201
 202 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 203                                                  __maybe_unused,
 204                                                  union perf_event *event
 205                                                  __maybe_unused,
 206                                                  struct perf_session *session
 207                                                 __maybe_unused)
 208 {
 209         dump_printf(": unhandled!\n");
 210         return 0;
 211 }
 212
 213 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 214                                          union perf_event *event __maybe_unused,
 215                                          struct perf_evlist **pevlist
 216                                          __maybe_unused)
 217 {
 218         dump_printf(": unhandled!\n");
 219         return 0;
 220 }
 221
 222 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 223                                      union perf_event *event __maybe_unused,
 224                                      struct perf_sample *sample __maybe_unused,
 225                                      struct perf_evsel *evsel __maybe_unused,
 226                                      struct machine *machine __maybe_unused)
 227 {
 228         dump_printf(": unhandled!\n");
 229         return 0;
 230 }
 231
 232 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 233                               union perf_event *event __maybe_unused,
 234                               struct perf_sample *sample __maybe_unused,
 235                               struct machine *machine __maybe_unused)
 236 {
 237         dump_printf(": unhandled!\n");
 238         return 0;
 239 }
 240
 241 static int process_build_id_stub(struct perf_tool *tool __maybe_unused,
 242                                  union perf_event *event __maybe_unused,
 243                                  struct perf_session *session __maybe_unused)
 244 {
 245         dump_printf(": unhandled!\n");
 246         return 0;
 247 }
 248
 249 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 250                                        union perf_event *event __maybe_unused,
 251                                        struct ordered_events *oe __maybe_unused)
 252 {
 253         dump_printf(": unhandled!\n");
 254         return 0;
 255 }
 256
 257 static int process_finished_round(struct perf_tool *tool,
 258                                   union perf_event *event,
 259                                   struct ordered_events *oe);
 260
 261 static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
 262                                  union perf_event *event __maybe_unused,
 263                                  struct perf_session *perf_session
 264                                  __maybe_unused)
 265 {
 266         dump_printf(": unhandled!\n");
 267         return 0;
 268 }
 269
 270 static int process_event_auxtrace_info_stub(struct perf_tool *tool __maybe_unused,
 271                                 union perf_event *event __maybe_unused,
 272                                 struct perf_session *session __maybe_unused)
 273 {
 274         dump_printf(": unhandled!\n");
 275         return 0;
 276 }
 277
 278 static int skipn(int fd, off_t n)
 279 {
 280         char buf[4096];
 281         ssize_t ret;
 282
 283         while (n > 0) {
 284                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 285                 if (ret <= 0)
 286                         return ret;
 287                 n -= ret;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
 294                                        union perf_event *event,
 295                                        struct perf_session *session
 296                                        __maybe_unused)
 297 {
 298         dump_printf(": unhandled!\n");
 299         if (perf_data_file__is_pipe(session->file))
 300                 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
 301         return event->auxtrace.size;
 302 }
 303
 304 static
 305 int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
 306                                       union perf_event *event __maybe_unused,
 307                                       struct perf_session *session __maybe_unused)
 308 {
 309         dump_printf(": unhandled!\n");
 310         return 0;
 311 }
 312
 313 void perf_tool__fill_defaults(struct perf_tool *tool)
 314 {
 315         if (tool->sample == NULL)
 316                 tool->sample = process_event_sample_stub;
 317         if (tool->mmap == NULL)
 318                 tool->mmap = process_event_stub;
 319         if (tool->mmap2 == NULL)
 320                 tool->mmap2 = process_event_stub;
 321         if (tool->comm == NULL)
 322                 tool->comm = process_event_stub;
 323         if (tool->fork == NULL)
 324                 tool->fork = process_event_stub;
 325         if (tool->exit == NULL)
 326                 tool->exit = process_event_stub;
 327         if (tool->lost == NULL)
 328                 tool->lost = perf_event__process_lost;
 329         if (tool->lost_samples == NULL)
 330                 tool->lost_samples = perf_event__process_lost_samples;
 331         if (tool->aux == NULL)
 332                 tool->aux = perf_event__process_aux;
 333         if (tool->itrace_start == NULL)
 334                 tool->itrace_start = perf_event__process_itrace_start;
 335         if (tool->read == NULL)
 336                 tool->read = process_event_sample_stub;
 337         if (tool->throttle == NULL)
 338                 tool->throttle = process_event_stub;
 339         if (tool->unthrottle == NULL)
 340                 tool->unthrottle = process_event_stub;
 341         if (tool->attr == NULL)
 342                 tool->attr = process_event_synth_attr_stub;
 343         if (tool->tracing_data == NULL)
 344                 tool->tracing_data = process_event_synth_tracing_data_stub;
 345         if (tool->build_id == NULL)
 346                 tool->build_id = process_build_id_stub;
 347         if (tool->finished_round == NULL) {
 348                 if (tool->ordered_events)
 349                         tool->finished_round = process_finished_round;
 350                 else
 351                         tool->finished_round = process_finished_round_stub;
 352         }
 353         if (tool->id_index == NULL)
 354                 tool->id_index = process_id_index_stub;
 355         if (tool->auxtrace_info == NULL)
 356                 tool->auxtrace_info = process_event_auxtrace_info_stub;
 357         if (tool->auxtrace == NULL)
 358                 tool->auxtrace = process_event_auxtrace_stub;
 359         if (tool->auxtrace_error == NULL)
 360                 tool->auxtrace_error = process_event_auxtrace_error_stub;
 361 }
 362
 363 static void swap_sample_id_all(union perf_event *event, void *data)
 364 {
 365         void *end = (void *) event + event->header.size;
 366         int size = end - data;
 367
 368         BUG_ON(size % sizeof(u64));
 369         mem_bswap_64(data, size);
 370 }
 371
 372 static void perf_event__all64_swap(union perf_event *event,
 373                                    bool sample_id_all __maybe_unused)
 374 {
 375         struct perf_event_header *hdr = &event->header;
 376         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 377 }
 378
 379 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 380 {
 381         event->comm.pid = bswap_32(event->comm.pid);
 382         event->comm.tid = bswap_32(event->comm.tid);
 383
 384         if (sample_id_all) {
 385                 void *data = &event->comm.comm;
 386
 387                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 388                 swap_sample_id_all(event, data);
 389         }
 390 }
 391
 392 static void perf_event__mmap_swap(union perf_event *event,
 393                                   bool sample_id_all)
 394 {
 395         event->mmap.pid   = bswap_32(event->mmap.pid);
 396         event->mmap.tid   = bswap_32(event->mmap.tid);
 397         event->mmap.start = bswap_64(event->mmap.start);
 398         event->mmap.len   = bswap_64(event->mmap.len);
 399         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 400
 401         if (sample_id_all) {
 402                 void *data = &event->mmap.filename;
 403
 404                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 405                 swap_sample_id_all(event, data);
 406         }
 407 }
 408
 409 static void perf_event__mmap2_swap(union perf_event *event,
 410                                   bool sample_id_all)
 411 {
 412         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 413         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 414         event->mmap2.start = bswap_64(event->mmap2.start);
 415         event->mmap2.len   = bswap_64(event->mmap2.len);
 416         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 417         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 418         event->mmap2.min   = bswap_32(event->mmap2.min);
 419         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 420
 421         if (sample_id_all) {
 422                 void *data = &event->mmap2.filename;
 423
 424                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 425                 swap_sample_id_all(event, data);
 426         }
 427 }
 428 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 429 {
 430         event->fork.pid  = bswap_32(event->fork.pid);
 431         event->fork.tid  = bswap_32(event->fork.tid);
 432         event->fork.ppid = bswap_32(event->fork.ppid);
 433         event->fork.ptid = bswap_32(event->fork.ptid);
 434         event->fork.time = bswap_64(event->fork.time);
 435
 436         if (sample_id_all)
 437                 swap_sample_id_all(event, &event->fork + 1);
 438 }
 439
 440 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 441 {
 442         event->read.pid          = bswap_32(event->read.pid);
 443         event->read.tid          = bswap_32(event->read.tid);
 444         event->read.value        = bswap_64(event->read.value);
 445         event->read.time_enabled = bswap_64(event->read.time_enabled);
 446         event->read.time_running = bswap_64(event->read.time_running);
 447         event->read.id           = bswap_64(event->read.id);
 448
 449         if (sample_id_all)
 450                 swap_sample_id_all(event, &event->read + 1);
 451 }
 452
 453 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 454 {
 455         event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 456         event->aux.aux_size   = bswap_64(event->aux.aux_size);
 457         event->aux.flags      = bswap_64(event->aux.flags);
 458
 459         if (sample_id_all)
 460                 swap_sample_id_all(event, &event->aux + 1);
 461 }
 462
 463 static void perf_event__itrace_start_swap(union perf_event *event,
 464                                           bool sample_id_all)
 465 {
 466         event->itrace_start.pid  = bswap_32(event->itrace_start.pid);
 467         event->itrace_start.tid  = bswap_32(event->itrace_start.tid);
 468
 469         if (sample_id_all)
 470                 swap_sample_id_all(event, &event->itrace_start + 1);
 471 }
 472
 473 static void perf_event__throttle_swap(union perf_event *event,
 474                                       bool sample_id_all)
 475 {
 476         event->throttle.time      = bswap_64(event->throttle.time);
 477         event->throttle.id        = bswap_64(event->throttle.id);
 478         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 479
 480         if (sample_id_all)
 481                 swap_sample_id_all(event, &event->throttle + 1);
 482 }
 483
 484 static u8 revbyte(u8 b)
 485 {
 486         int rev = (b >> 4) | ((b & 0xf) << 4);
 487         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 488         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 489         return (u8) rev;
 490 }
 491
 492 /*
 493  * XXX this is hack in attempt to carry flags bitfield
 494  * throught endian village. ABI says:
 495  *
 496  * Bit-fields are allocated from right to left (least to most significant)
 497  * on little-endian implementations and from left to right (most to least
 498  * significant) on big-endian implementations.
 499  *
 500  * The above seems to be byte specific, so we need to reverse each
 501  * byte of the bitfield. 'Internet' also says this might be implementation
 502  * specific and we probably need proper fix and carry perf_event_attr
 503  * bitfield flags in separate data file FEAT_ section. Thought this seems
 504  * to work for now.
 505  */
 506 static void swap_bitfield(u8 *p, unsigned len)
 507 {
 508         unsigned i;
 509
 510         for (i = 0; i < len; i++) {
 511                 *p = revbyte(*p);
 512                 p++;
 513         }
 514 }
 515
 516 /* exported for swapping attributes in file header */
 517 void perf_event__attr_swap(struct perf_event_attr *attr)
 518 {
 519         attr->type              = bswap_32(attr->type);
 520         attr->size              = bswap_32(attr->size);
 521
 522 #define bswap_safe(f, n)                                        \
 523         (attr->size > (offsetof(struct perf_event_attr, f) +    \
 524                        sizeof(attr->f) * (n)))
 525 #define bswap_field(f, sz)                      \
 526 do {                                            \
 527         if (bswap_safe(f, 0))                   \
 528                 attr->f = bswap_##sz(attr->f);  \
 529 } while(0)
 530 #define bswap_field_32(f) bswap_field(f, 32)
 531 #define bswap_field_64(f) bswap_field(f, 64)
 532
 533         bswap_field_64(config);
 534         bswap_field_64(sample_period);
 535         bswap_field_64(sample_type);
 536         bswap_field_64(read_format);
 537         bswap_field_32(wakeup_events);
 538         bswap_field_32(bp_type);
 539         bswap_field_64(bp_addr);
 540         bswap_field_64(bp_len);
 541         bswap_field_64(branch_sample_type);
 542         bswap_field_64(sample_regs_user);
 543         bswap_field_32(sample_stack_user);
 544         bswap_field_32(aux_watermark);
 545
 546         /*
 547          * After read_format are bitfields. Check read_format because
 548          * we are unable to use offsetof on bitfield.
 549          */
 550         if (bswap_safe(read_format, 1))
 551                 swap_bitfield((u8 *) (&attr->read_format + 1),
 552                               sizeof(u64));
 553 #undef bswap_field_64
 554 #undef bswap_field_32
 555 #undef bswap_field
 556 #undef bswap_safe
 557 }
 558
 559 static void perf_event__hdr_attr_swap(union perf_event *event,
 560                                       bool sample_id_all __maybe_unused)
 561 {
 562         size_t size;
 563
 564         perf_event__attr_swap(&event->attr.attr);
 565
 566         size = event->header.size;
 567         size -= (void *)&event->attr.id - (void *)event;
 568         mem_bswap_64(event->attr.id, size);
 569 }
 570
 571 static void perf_event__event_type_swap(union perf_event *event,
 572                                         bool sample_id_all __maybe_unused)
 573 {
 574         event->event_type.event_type.event_id =
 575                 bswap_64(event->event_type.event_type.event_id);
 576 }
 577
 578 static void perf_event__tracing_data_swap(union perf_event *event,
 579                                           bool sample_id_all __maybe_unused)
 580 {
 581         event->tracing_data.size = bswap_32(event->tracing_data.size);
 582 }
 583
 584 static void perf_event__auxtrace_info_swap(union perf_event *event,
 585                                            bool sample_id_all __maybe_unused)
 586 {
 587         size_t size;
 588
 589         event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 590
 591         size = event->header.size;
 592         size -= (void *)&event->auxtrace_info.priv - (void *)event;
 593         mem_bswap_64(event->auxtrace_info.priv, size);
 594 }
 595
 596 static void perf_event__auxtrace_swap(union perf_event *event,
 597                                       bool sample_id_all __maybe_unused)
 598 {
 599         event->auxtrace.size      = bswap_64(event->auxtrace.size);
 600         event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 601         event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 602         event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 603         event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 604         event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 605 }
 606
 607 static void perf_event__auxtrace_error_swap(union perf_event *event,
 608                                             bool sample_id_all __maybe_unused)
 609 {
 610         event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 611         event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 612         event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 613         event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 614         event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 615         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 616 }
 617
 618 typedef void (*perf_event__swap_op)(union perf_event *event,
 619                                     bool sample_id_all);
 620
 621 static perf_event__swap_op perf_event__swap_ops[] = {
 622         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 623         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 624         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 625         [PERF_RECORD_FORK]                = perf_event__task_swap,
 626         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 627         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 628         [PERF_RECORD_READ]                = perf_event__read_swap,
 629         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 630         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 631         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 632         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
 633         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
 634         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
 635         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 636         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 637         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 638         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 639         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
 640         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
 641         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
 642         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
 643         [PERF_RECORD_HEADER_MAX]          = NULL,
 644 };
 645
 646 /*
 647  * When perf record finishes a pass on every buffers, it records this pseudo
 648  * event.
 649  * We record the max timestamp t found in the pass n.
 650  * Assuming these timestamps are monotonic across cpus, we know that if
 651  * a buffer still has events with timestamps below t, they will be all
 652  * available and then read in the pass n + 1.
 653  * Hence when we start to read the pass n + 2, we can safely flush every
 654  * events with timestamps below t.
 655  *
 656  *    ============ PASS n =================
 657  *       CPU 0         |   CPU 1
 658  *                     |
 659  *    cnt1 timestamps  |   cnt2 timestamps
 660  *          1          |         2
 661  *          2          |         3
 662  *          -          |         4  <--- max recorded
 663  *
 664  *    ============ PASS n + 1 ==============
 665  *       CPU 0         |   CPU 1
 666  *                     |
 667  *    cnt1 timestamps  |   cnt2 timestamps
 668  *          3          |         5
 669  *          4          |         6
 670  *          5          |         7 <---- max recorded
 671  *
 672  *      Flush every events below timestamp 4
 673  *
 674  *    ============ PASS n + 2 ==============
 675  *       CPU 0         |   CPU 1
 676  *                     |
 677  *    cnt1 timestamps  |   cnt2 timestamps
 678  *          6          |         8
 679  *          7          |         9
 680  *          -          |         10
 681  *
 682  *      Flush every events below timestamp 7
 683  *      etc...
 684  */
 685 static int process_finished_round(struct perf_tool *tool __maybe_unused,
 686                                   union perf_event *event __maybe_unused,
 687                                   struct ordered_events *oe)
 688 {
 689         return ordered_events__flush(oe, OE_FLUSH__ROUND);
 690 }
 691
 692 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
 693                               struct perf_sample *sample, u64 file_offset)
 694 {
 695         return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
 696 }
 697
 698 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 699 {
 700         struct ip_callchain *callchain = sample->callchain;
 701         struct branch_stack *lbr_stack = sample->branch_stack;
 702         u64 kernel_callchain_nr = callchain->nr;
 703         unsigned int i;
 704
 705         for (i = 0; i < kernel_callchain_nr; i++) {
 706                 if (callchain->ips[i] == PERF_CONTEXT_USER)
 707                         break;
 708         }
 709
 710         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 711                 u64 total_nr;
 712                 /*
 713                  * LBR callstack can only get user call chain,
 714                  * i is kernel call chain number,
 715                  * 1 is PERF_CONTEXT_USER.
 716                  *
 717                  * The user call chain is stored in LBR registers.
 718                  * LBR are pair registers. The caller is stored
 719                  * in "from" register, while the callee is stored
 720                  * in "to" register.
 721                  * For example, there is a call stack
 722                  * "A"->"B"->"C"->"D".
 723                  * The LBR registers will recorde like
 724                  * "C"->"D", "B"->"C", "A"->"B".
 725                  * So only the first "to" register and all "from"
 726                  * registers are needed to construct the whole stack.
 727                  */
 728                 total_nr = i + 1 + lbr_stack->nr + 1;
 729                 kernel_callchain_nr = i + 1;
 730
 731                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 732
 733                 for (i = 0; i < kernel_callchain_nr; i++)
 734                         printf("..... %2d: %016" PRIx64 "\n",
 735                                i, callchain->ips[i]);
 736
 737                 printf("..... %2d: %016" PRIx64 "\n",
 738                        (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 739                 for (i = 0; i < lbr_stack->nr; i++)
 740                         printf("..... %2d: %016" PRIx64 "\n",
 741                                (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 742         }
 743 }
 744
 745 static void callchain__printf(struct perf_evsel *evsel,
 746                               struct perf_sample *sample)
 747 {
 748         unsigned int i;
 749         struct ip_callchain *callchain = sample->callchain;
 750
 751         if (has_branch_callstack(evsel))
 752                 callchain__lbr_callstack_printf(sample);
 753
 754         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 755
 756         for (i = 0; i < callchain->nr; i++)
 757                 printf("..... %2d: %016" PRIx64 "\n",
 758                        i, callchain->ips[i]);
 759 }
 760
 761 static void branch_stack__printf(struct perf_sample *sample)
 762 {
 763         uint64_t i;
 764
 765         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 766
 767         for (i = 0; i < sample->branch_stack->nr; i++)
 768                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
 769                         i, sample->branch_stack->entries[i].from,
 770                         sample->branch_stack->entries[i].to);
 771 }
 772
 773 static void regs_dump__printf(u64 mask, u64 *regs)
 774 {
 775         unsigned rid, i = 0;
 776
 777         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 778                 u64 val = regs[i++];
 779
 780                 printf(".... %-5s 0x%" PRIx64 "\n",
 781                        perf_reg_name(rid), val);
 782         }
 783 }
 784
 785 static const char *regs_abi[] = {
 786         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
 787         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 788         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 789 };
 790
 791 static inline const char *regs_dump_abi(struct regs_dump *d)
 792 {
 793         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 794                 return "unknown";
 795
 796         return regs_abi[d->abi];
 797 }
 798
 799 static void regs__printf(const char *type, struct regs_dump *regs)
 800 {
 801         u64 mask = regs->mask;
 802
 803         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 804                type,
 805                mask,
 806                regs_dump_abi(regs));
 807
 808         regs_dump__printf(mask, regs->regs);
 809 }
 810
 811 static void regs_user__printf(struct perf_sample *sample)
 812 {
 813         struct regs_dump *user_regs = &sample->user_regs;
 814
 815         if (user_regs->regs)
 816                 regs__printf("user", user_regs);
 817 }
 818
 819 static void regs_intr__printf(struct perf_sample *sample)
 820 {
 821         struct regs_dump *intr_regs = &sample->intr_regs;
 822
 823         if (intr_regs->regs)
 824                 regs__printf("intr", intr_regs);
 825 }
 826
 827 static void stack_user__printf(struct stack_dump *dump)
 828 {
 829         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 830                dump->size, dump->offset);
 831 }
 832
 833 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
 834                                        union perf_event *event,
 835                                        struct perf_sample *sample)
 836 {
 837         u64 sample_type = __perf_evlist__combined_sample_type(evlist);
 838
 839         if (event->header.type != PERF_RECORD_SAMPLE &&
 840             !perf_evlist__sample_id_all(evlist)) {
 841                 fputs("-1 -1 ", stdout);
 842                 return;
 843         }
 844
 845         if ((sample_type & PERF_SAMPLE_CPU))
 846                 printf("%u ", sample->cpu);
 847
 848         if (sample_type & PERF_SAMPLE_TIME)
 849                 printf("%" PRIu64 " ", sample->time);
 850 }
 851
 852 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
 853 {
 854         printf("... sample_read:\n");
 855
 856         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
 857                 printf("...... time enabled %016" PRIx64 "\n",
 858                        sample->read.time_enabled);
 859
 860         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
 861                 printf("...... time running %016" PRIx64 "\n",
 862                        sample->read.time_running);
 863
 864         if (read_format & PERF_FORMAT_GROUP) {
 865                 u64 i;
 866
 867                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
 868
 869                 for (i = 0; i < sample->read.group.nr; i++) {
 870                         struct sample_read_value *value;
 871
 872                         value = &sample->read.group.values[i];
 873                         printf("..... id %016" PRIx64
 874                                ", value %016" PRIx64 "\n",
 875                                value->id, value->value);
 876                 }
 877         } else
 878                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
 879                         sample->read.one.id, sample->read.one.value);
 880 }
 881
 882 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
 883                        u64 file_offset, struct perf_sample *sample)
 884 {
 885         if (!dump_trace)
 886                 return;
 887
 888         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 889                file_offset, event->header.size, event->header.type);
 890
 891         trace_event(event);
 892
 893         if (sample)
 894                 perf_evlist__print_tstamp(evlist, event, sample);
 895
 896         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 897                event->header.size, perf_event__name(event->header.type));
 898 }
 899
 900 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 901                         struct perf_sample *sample)
 902 {
 903         u64 sample_type;
 904
 905         if (!dump_trace)
 906                 return;
 907
 908         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 909                event->header.misc, sample->pid, sample->tid, sample->ip,
 910                sample->period, sample->addr);
 911
 912         sample_type = evsel->attr.sample_type;
 913
 914         if (sample_type & PERF_SAMPLE_CALLCHAIN)
 915                 callchain__printf(evsel, sample);
 916
 917         if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
 918                 branch_stack__printf(sample);
 919
 920         if (sample_type & PERF_SAMPLE_REGS_USER)
 921                 regs_user__printf(sample);
 922
 923         if (sample_type & PERF_SAMPLE_REGS_INTR)
 924                 regs_intr__printf(sample);
 925
 926         if (sample_type & PERF_SAMPLE_STACK_USER)
 927                 stack_user__printf(&sample->user_stack);
 928
 929         if (sample_type & PERF_SAMPLE_WEIGHT)
 930                 printf("... weight: %" PRIu64 "\n", sample->weight);
 931
 932         if (sample_type & PERF_SAMPLE_DATA_SRC)
 933                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
 934
 935         if (sample_type & PERF_SAMPLE_TRANSACTION)
 936                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
 937
 938         if (sample_type & PERF_SAMPLE_READ)
 939                 sample_read__printf(sample, evsel->attr.read_format);
 940 }
 941
 942 static struct machine *machines__find_for_cpumode(struct machines *machines,
 943                                                union perf_event *event,
 944                                                struct perf_sample *sample)
 945 {
 946         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 947         struct machine *machine;
 948
 949         if (perf_guest &&
 950             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
 951              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
 952                 u32 pid;
 953
 954                 if (event->header.type == PERF_RECORD_MMAP
 955                     || event->header.type == PERF_RECORD_MMAP2)
 956                         pid = event->mmap.pid;
 957                 else
 958                         pid = sample->pid;
 959
 960                 machine = machines__find(machines, pid);
 961                 if (!machine)
 962                         machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID);
 963                 return machine;
 964         }
 965
 966         return &machines->host;
 967 }
 968
 969 static int deliver_sample_value(struct perf_evlist *evlist,
 970                                 struct perf_tool *tool,
 971                                 union perf_event *event,
 972                                 struct perf_sample *sample,
 973                                 struct sample_read_value *v,
 974                                 struct machine *machine)
 975 {
 976         struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
 977
 978         if (sid) {
 979                 sample->id     = v->id;
 980                 sample->period = v->value - sid->period;
 981                 sid->period    = v->value;
 982         }
 983
 984         if (!sid || sid->evsel == NULL) {
 985                 ++evlist->stats.nr_unknown_id;
 986                 return 0;
 987         }
 988
 989         return tool->sample(tool, event, sample, sid->evsel, machine);
 990 }
 991
 992 static int deliver_sample_group(struct perf_evlist *evlist,
 993                                 struct perf_tool *tool,
 994                                 union  perf_event *event,
 995                                 struct perf_sample *sample,
 996                                 struct machine *machine)
 997 {
 998         int ret = -EINVAL;
 999         u64 i;
1000
1001         for (i = 0; i < sample->read.group.nr; i++) {
1002                 ret = deliver_sample_value(evlist, tool, event, sample,
1003                                            &sample->read.group.values[i],
1004                                            machine);
1005                 if (ret)
1006                         break;
1007         }
1008
1009         return ret;
1010 }
1011
1012 static int
1013  perf_evlist__deliver_sample(struct perf_evlist *evlist,
1014                              struct perf_tool *tool,
1015                              union  perf_event *event,
1016                              struct perf_sample *sample,
1017                              struct perf_evsel *evsel,
1018                              struct machine *machine)
1019 {
1020         /* We know evsel != NULL. */
1021         u64 sample_type = evsel->attr.sample_type;
1022         u64 read_format = evsel->attr.read_format;
1023
1024         /* Standard sample delievery. */
1025         if (!(sample_type & PERF_SAMPLE_READ))
1026                 return tool->sample(tool, event, sample, evsel, machine);
1027
1028         /* For PERF_SAMPLE_READ we have either single or group mode. */
1029         if (read_format & PERF_FORMAT_GROUP)
1030                 return deliver_sample_group(evlist, tool, event, sample,
1031                                             machine);
1032         else
1033                 return deliver_sample_value(evlist, tool, event, sample,
1034                                             &sample->read.one, machine);
1035 }
1036
1037 static int machines__deliver_event(struct machines *machines,
1038                                    struct perf_evlist *evlist,
1039                                    union perf_event *event,
1040                                    struct perf_sample *sample,
1041                                    struct perf_tool *tool, u64 file_offset)
1042 {
1043         struct perf_evsel *evsel;
1044         struct machine *machine;
1045
1046         dump_event(evlist, event, file_offset, sample);
1047
1048         evsel = perf_evlist__id2evsel(evlist, sample->id);
1049
1050         machine = machines__find_for_cpumode(machines, event, sample);
1051
1052         switch (event->header.type) {
1053         case PERF_RECORD_SAMPLE:
1054                 dump_sample(evsel, event, sample);
1055                 if (evsel == NULL) {
1056                         ++evlist->stats.nr_unknown_id;
1057                         return 0;
1058                 }
1059                 if (machine == NULL) {
1060                         ++evlist->stats.nr_unprocessable_samples;
1061                         return 0;
1062                 }
1063                 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1064         case PERF_RECORD_MMAP:
1065                 return tool->mmap(tool, event, sample, machine);
1066         case PERF_RECORD_MMAP2:
1067                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1068                         ++evlist->stats.nr_proc_map_timeout;
1069                 return tool->mmap2(tool, event, sample, machine);
1070         case PERF_RECORD_COMM:
1071                 return tool->comm(tool, event, sample, machine);
1072         case PERF_RECORD_FORK:
1073                 return tool->fork(tool, event, sample, machine);
1074         case PERF_RECORD_EXIT:
1075                 return tool->exit(tool, event, sample, machine);
1076         case PERF_RECORD_LOST:
1077                 if (tool->lost == perf_event__process_lost)
1078                         evlist->stats.total_lost += event->lost.lost;
1079                 return tool->lost(tool, event, sample, machine);
1080         case PERF_RECORD_LOST_SAMPLES:
1081                 if (tool->lost_samples == perf_event__process_lost_samples)
1082                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1083                 return tool->lost_samples(tool, event, sample, machine);
1084         case PERF_RECORD_READ:
1085                 return tool->read(tool, event, sample, evsel, machine);
1086         case PERF_RECORD_THROTTLE:
1087                 return tool->throttle(tool, event, sample, machine);
1088         case PERF_RECORD_UNTHROTTLE:
1089                 return tool->unthrottle(tool, event, sample, machine);
1090         case PERF_RECORD_AUX:
1091                 return tool->aux(tool, event, sample, machine);
1092         case PERF_RECORD_ITRACE_START:
1093                 return tool->itrace_start(tool, event, sample, machine);
1094         default:
1095                 ++evlist->stats.nr_unknown_events;
1096                 return -1;
1097         }
1098 }
1099
1100 static int perf_session__deliver_event(struct perf_session *session,
1101                                        union perf_event *event,
1102                                        struct perf_sample *sample,
1103                                        struct perf_tool *tool,
1104                                        u64 file_offset)
1105 {
1106         int ret;
1107
1108         ret = auxtrace__process_event(session, event, sample, tool);
1109         if (ret < 0)
1110                 return ret;
1111         if (ret > 0)
1112                 return 0;
1113
1114         return machines__deliver_event(&session->machines, session->evlist,
1115                                        event, sample, tool, file_offset);
1116 }
1117
1118 static s64 perf_session__process_user_event(struct perf_session *session,
1119                                             union perf_event *event,
1120                                             u64 file_offset)
1121 {
1122         struct ordered_events *oe = &session->ordered_events;
1123         struct perf_tool *tool = session->tool;
1124         int fd = perf_data_file__fd(session->file);
1125         int err;
1126
1127         dump_event(session->evlist, event, file_offset, NULL);
1128
1129         /* These events are processed right away */
1130         switch (event->header.type) {
1131         case PERF_RECORD_HEADER_ATTR:
1132                 err = tool->attr(tool, event, &session->evlist);
1133                 if (err == 0) {
1134                         perf_session__set_id_hdr_size(session);
1135                         perf_session__set_comm_exec(session);
1136                 }
1137                 return err;
1138         case PERF_RECORD_HEADER_EVENT_TYPE:
1139                 /*
1140                  * Depreceated, but we need to handle it for sake
1141                  * of old data files create in pipe mode.
1142                  */
1143                 return 0;
1144         case PERF_RECORD_HEADER_TRACING_DATA:
1145                 /* setup for reading amidst mmap */
1146                 lseek(fd, file_offset, SEEK_SET);
1147                 return tool->tracing_data(tool, event, session);
1148         case PERF_RECORD_HEADER_BUILD_ID:
1149                 return tool->build_id(tool, event, session);
1150         case PERF_RECORD_FINISHED_ROUND:
1151                 return tool->finished_round(tool, event, oe);
1152         case PERF_RECORD_ID_INDEX:
1153                 return tool->id_index(tool, event, session);
1154         case PERF_RECORD_AUXTRACE_INFO:
1155                 return tool->auxtrace_info(tool, event, session);
1156         case PERF_RECORD_AUXTRACE:
1157                 /* setup for reading amidst mmap */
1158                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1159                 return tool->auxtrace(tool, event, session);
1160         case PERF_RECORD_AUXTRACE_ERROR:
1161                 perf_session__auxtrace_error_inc(session, event);
1162                 return tool->auxtrace_error(tool, event, session);
1163         default:
1164                 return -EINVAL;
1165         }
1166 }
1167
1168 int perf_session__deliver_synth_event(struct perf_session *session,
1169                                       union perf_event *event,
1170                                       struct perf_sample *sample)
1171 {
1172         struct perf_evlist *evlist = session->evlist;
1173         struct perf_tool *tool = session->tool;
1174
1175         events_stats__inc(&evlist->stats, event->header.type);
1176
1177         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1178                 return perf_session__process_user_event(session, event, 0);
1179
1180         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1181 }
1182
1183 static void event_swap(union perf_event *event, bool sample_id_all)
1184 {
1185         perf_event__swap_op swap;
1186
1187         swap = perf_event__swap_ops[event->header.type];
1188         if (swap)
1189                 swap(event, sample_id_all);
1190 }
1191
1192 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1193                              void *buf, size_t buf_sz,
1194                              union perf_event **event_ptr,
1195                              struct perf_sample *sample)
1196 {
1197         union perf_event *event;
1198         size_t hdr_sz, rest;
1199         int fd;
1200
1201         if (session->one_mmap && !session->header.needs_swap) {
1202                 event = file_offset - session->one_mmap_offset +
1203                         session->one_mmap_addr;
1204                 goto out_parse_sample;
1205         }
1206
1207         if (perf_data_file__is_pipe(session->file))
1208                 return -1;
1209
1210         fd = perf_data_file__fd(session->file);
1211         hdr_sz = sizeof(struct perf_event_header);
1212
1213         if (buf_sz < hdr_sz)
1214                 return -1;
1215
1216         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1217             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1218                 return -1;
1219
1220         event = (union perf_event *)buf;
1221
1222         if (session->header.needs_swap)
1223                 perf_event_header__bswap(&event->header);
1224
1225         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1226                 return -1;
1227
1228         rest = event->header.size - hdr_sz;
1229
1230         if (readn(fd, buf, rest) != (ssize_t)rest)
1231                 return -1;
1232
1233         if (session->header.needs_swap)
1234                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1235
1236 out_parse_sample:
1237
1238         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1239             perf_evlist__parse_sample(session->evlist, event, sample))
1240                 return -1;
1241
1242         *event_ptr = event;
1243
1244         return 0;
1245 }
1246
1247 static s64 perf_session__process_event(struct perf_session *session,
1248                                        union perf_event *event, u64 file_offset)
1249 {
1250         struct perf_evlist *evlist = session->evlist;
1251         struct perf_tool *tool = session->tool;
1252         struct perf_sample sample;
1253         int ret;
1254
1255         if (session->header.needs_swap)
1256                 event_swap(event, perf_evlist__sample_id_all(evlist));
1257
1258         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1259                 return -EINVAL;
1260
1261         events_stats__inc(&evlist->stats, event->header.type);
1262
1263         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1264                 return perf_session__process_user_event(session, event, file_offset);
1265
1266         /*
1267          * For all kernel events we get the sample data
1268          */
1269         ret = perf_evlist__parse_sample(evlist, event, &sample);
1270         if (ret)
1271                 return ret;
1272
1273         if (tool->ordered_events) {
1274                 ret = perf_session__queue_event(session, event, &sample, file_offset);
1275                 if (ret != -ETIME)
1276                         return ret;
1277         }
1278
1279         return perf_session__deliver_event(session, event, &sample, tool,
1280                                            file_offset);
1281 }
1282
1283 void perf_event_header__bswap(struct perf_event_header *hdr)
1284 {
1285         hdr->type = bswap_32(hdr->type);
1286         hdr->misc = bswap_16(hdr->misc);
1287         hdr->size = bswap_16(hdr->size);
1288 }
1289
1290 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1291 {
1292         return machine__findnew_thread(&session->machines.host, -1, pid);
1293 }
1294
1295 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1296 {
1297         struct thread *thread;
1298
1299         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1300         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1301                 pr_err("problem inserting idle task.\n");
1302                 thread = NULL;
1303         }
1304
1305         return thread;
1306 }
1307
1308 static void perf_session__warn_about_errors(const struct perf_session *session)
1309 {
1310         const struct events_stats *stats = &session->evlist->stats;
1311         const struct ordered_events *oe = &session->ordered_events;
1312
1313         if (session->tool->lost == perf_event__process_lost &&
1314             stats->nr_events[PERF_RECORD_LOST] != 0) {
1315                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1316                             "Check IO/CPU overload!\n\n",
1317                             stats->nr_events[0],
1318                             stats->nr_events[PERF_RECORD_LOST]);
1319         }
1320
1321         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1322                 double drop_rate;
1323
1324                 drop_rate = (double)stats->total_lost_samples /
1325                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1326                 if (drop_rate > 0.05) {
1327                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1328                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1329                                     drop_rate * 100.0);
1330                 }
1331         }
1332
1333         if (stats->nr_unknown_events != 0) {
1334                 ui__warning("Found %u unknown events!\n\n"
1335                             "Is this an older tool processing a perf.data "
1336                             "file generated by a more recent tool?\n\n"
1337                             "If that is not the case, consider "
1338                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1339                             stats->nr_unknown_events);
1340         }
1341
1342         if (stats->nr_unknown_id != 0) {
1343                 ui__warning("%u samples with id not present in the header\n",
1344                             stats->nr_unknown_id);
1345         }
1346
1347         if (stats->nr_invalid_chains != 0) {
1348                 ui__warning("Found invalid callchains!\n\n"
1349                             "%u out of %u events were discarded for this reason.\n\n"
1350                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1351                             stats->nr_invalid_chains,
1352                             stats->nr_events[PERF_RECORD_SAMPLE]);
1353         }
1354
1355         if (stats->nr_unprocessable_samples != 0) {
1356                 ui__warning("%u unprocessable samples recorded.\n"
1357                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1358                             stats->nr_unprocessable_samples);
1359         }
1360
1361         if (oe->nr_unordered_events != 0)
1362                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1363
1364         events_stats__auxtrace_error_warn(stats);
1365
1366         if (stats->nr_proc_map_timeout != 0) {
1367                 ui__warning("%d map information files for pre-existing threads were\n"
1368                             "not processed, if there are samples for addresses they\n"
1369                             "will not be resolved, you may find out which are these\n"
1370                             "threads by running with -v and redirecting the output\n"
1371                             "to a file.\n"
1372                             "The time limit to process proc map is too short?\n"
1373                             "Increase it by --proc-map-timeout\n",
1374                             stats->nr_proc_map_timeout);
1375         }
1376 }
1377
1378 static int perf_session__flush_thread_stack(struct thread *thread,
1379                                             void *p __maybe_unused)
1380 {
1381         return thread_stack__flush(thread);
1382 }
1383
1384 static int perf_session__flush_thread_stacks(struct perf_session *session)
1385 {
1386         return machines__for_each_thread(&session->machines,
1387                                          perf_session__flush_thread_stack,
1388                                          NULL);
1389 }
1390
1391 volatile int session_done;
1392
1393 static int __perf_session__process_pipe_events(struct perf_session *session)
1394 {
1395         struct ordered_events *oe = &session->ordered_events;
1396         struct perf_tool *tool = session->tool;
1397         int fd = perf_data_file__fd(session->file);
1398         union perf_event *event;
1399         uint32_t size, cur_size = 0;
1400         void *buf = NULL;
1401         s64 skip = 0;
1402         u64 head;
1403         ssize_t err;
1404         void *p;
1405
1406         perf_tool__fill_defaults(tool);
1407
1408         head = 0;
1409         cur_size = sizeof(union perf_event);
1410
1411         buf = malloc(cur_size);
1412         if (!buf)
1413                 return -errno;
1414 more:
1415         event = buf;
1416         err = readn(fd, event, sizeof(struct perf_event_header));
1417         if (err <= 0) {
1418                 if (err == 0)
1419                         goto done;
1420
1421                 pr_err("failed to read event header\n");
1422                 goto out_err;
1423         }
1424
1425         if (session->header.needs_swap)
1426                 perf_event_header__bswap(&event->header);
1427
1428         size = event->header.size;
1429         if (size < sizeof(struct perf_event_header)) {
1430                 pr_err("bad event header size\n");
1431                 goto out_err;
1432         }
1433
1434         if (size > cur_size) {
1435                 void *new = realloc(buf, size);
1436                 if (!new) {
1437                         pr_err("failed to allocate memory to read event\n");
1438                         goto out_err;
1439                 }
1440                 buf = new;
1441                 cur_size = size;
1442                 event = buf;
1443         }
1444         p = event;
1445         p += sizeof(struct perf_event_header);
1446
1447         if (size - sizeof(struct perf_event_header)) {
1448                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1449                 if (err <= 0) {
1450                         if (err == 0) {
1451                                 pr_err("unexpected end of event stream\n");
1452                                 goto done;
1453                         }
1454
1455                         pr_err("failed to read event data\n");
1456                         goto out_err;
1457                 }
1458         }
1459
1460         if ((skip = perf_session__process_event(session, event, head)) < 0) {
1461                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1462                        head, event->header.size, event->header.type);
1463                 err = -EINVAL;
1464                 goto out_err;
1465         }
1466
1467         head += size;
1468
1469         if (skip > 0)
1470                 head += skip;
1471
1472         if (!session_done())
1473                 goto more;
1474 done:
1475         /* do the final flush for ordered samples */
1476         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1477         if (err)
1478                 goto out_err;
1479         err = auxtrace__flush_events(session, tool);
1480         if (err)
1481                 goto out_err;
1482         err = perf_session__flush_thread_stacks(session);
1483 out_err:
1484         free(buf);
1485         perf_session__warn_about_errors(session);
1486         ordered_events__free(&session->ordered_events);
1487         auxtrace__free_events(session);
1488         return err;
1489 }
1490
1491 static union perf_event *
1492 fetch_mmaped_event(struct perf_session *session,
1493                    u64 head, size_t mmap_size, char *buf)
1494 {
1495         union perf_event *event;
1496
1497         /*
1498          * Ensure we have enough space remaining to read
1499          * the size of the event in the headers.
1500          */
1501         if (head + sizeof(event->header) > mmap_size)
1502                 return NULL;
1503
1504         event = (union perf_event *)(buf + head);
1505
1506         if (session->header.needs_swap)
1507                 perf_event_header__bswap(&event->header);
1508
1509         if (head + event->header.size > mmap_size) {
1510                 /* We're not fetching the event so swap back again */
1511                 if (session->header.needs_swap)
1512                         perf_event_header__bswap(&event->header);
1513                 return NULL;
1514         }
1515
1516         return event;
1517 }
1518
1519 /*
1520  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1521  * slices. On 32bit we use 32MB.
1522  */
1523 #if BITS_PER_LONG == 64
1524 #define MMAP_SIZE ULLONG_MAX
1525 #define NUM_MMAPS 1
1526 #else
1527 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1528 #define NUM_MMAPS 128
1529 #endif
1530
1531 static int __perf_session__process_events(struct perf_session *session,
1532                                           u64 data_offset, u64 data_size,
1533                                           u64 file_size)
1534 {
1535         struct ordered_events *oe = &session->ordered_events;
1536         struct perf_tool *tool = session->tool;
1537         int fd = perf_data_file__fd(session->file);
1538         u64 head, page_offset, file_offset, file_pos, size;
1539         int err, mmap_prot, mmap_flags, map_idx = 0;
1540         size_t  mmap_size;
1541         char *buf, *mmaps[NUM_MMAPS];
1542         union perf_event *event;
1543         struct ui_progress prog;
1544         s64 skip;
1545
1546         perf_tool__fill_defaults(tool);
1547
1548         page_offset = page_size * (data_offset / page_size);
1549         file_offset = page_offset;
1550         head = data_offset - page_offset;
1551
1552         if (data_size && (data_offset + data_size < file_size))
1553                 file_size = data_offset + data_size;
1554
1555         ui_progress__init(&prog, file_size, "Processing events...");
1556
1557         mmap_size = MMAP_SIZE;
1558         if (mmap_size > file_size) {
1559                 mmap_size = file_size;
1560                 session->one_mmap = true;
1561         }
1562
1563         memset(mmaps, 0, sizeof(mmaps));
1564
1565         mmap_prot  = PROT_READ;
1566         mmap_flags = MAP_SHARED;
1567
1568         if (session->header.needs_swap) {
1569                 mmap_prot  |= PROT_WRITE;
1570                 mmap_flags = MAP_PRIVATE;
1571         }
1572 remap:
1573         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1574                    file_offset);
1575         if (buf == MAP_FAILED) {
1576                 pr_err("failed to mmap file\n");
1577                 err = -errno;
1578                 goto out_err;
1579         }
1580         mmaps[map_idx] = buf;
1581         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1582         file_pos = file_offset + head;
1583         if (session->one_mmap) {
1584                 session->one_mmap_addr = buf;
1585                 session->one_mmap_offset = file_offset;
1586         }
1587
1588 more:
1589         event = fetch_mmaped_event(session, head, mmap_size, buf);
1590         if (!event) {
1591                 if (mmaps[map_idx]) {
1592                         munmap(mmaps[map_idx], mmap_size);
1593                         mmaps[map_idx] = NULL;
1594                 }
1595
1596                 page_offset = page_size * (head / page_size);
1597                 file_offset += page_offset;
1598                 head -= page_offset;
1599                 goto remap;
1600         }
1601
1602         size = event->header.size;
1603
1604         if (size < sizeof(struct perf_event_header) ||
1605             (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1606                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1607                        file_offset + head, event->header.size,
1608                        event->header.type);
1609                 err = -EINVAL;
1610                 goto out_err;
1611         }
1612
1613         if (skip)
1614                 size += skip;
1615
1616         head += size;
1617         file_pos += size;
1618
1619         ui_progress__update(&prog, size);
1620
1621         if (session_done())
1622                 goto out;
1623
1624         if (file_pos < file_size)
1625                 goto more;
1626
1627 out:
1628         /* do the final flush for ordered samples */
1629         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1630         if (err)
1631                 goto out_err;
1632         err = auxtrace__flush_events(session, tool);
1633         if (err)
1634                 goto out_err;
1635         err = perf_session__flush_thread_stacks(session);
1636 out_err:
1637         ui_progress__finish();
1638         perf_session__warn_about_errors(session);
1639         ordered_events__free(&session->ordered_events);
1640         auxtrace__free_events(session);
1641         session->one_mmap = false;
1642         return err;
1643 }
1644
1645 int perf_session__process_events(struct perf_session *session)
1646 {
1647         u64 size = perf_data_file__size(session->file);
1648         int err;
1649
1650         if (perf_session__register_idle_thread(session) == NULL)
1651                 return -ENOMEM;
1652
1653         if (!perf_data_file__is_pipe(session->file))
1654                 err = __perf_session__process_events(session,
1655                                                      session->header.data_offset,
1656                                                      session->header.data_size, size);
1657         else
1658                 err = __perf_session__process_pipe_events(session);
1659
1660         return err;
1661 }
1662
1663 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1664 {
1665         struct perf_evsel *evsel;
1666
1667         evlist__for_each(session->evlist, evsel) {
1668                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1669                         return true;
1670         }
1671
1672         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1673         return false;
1674 }
1675
1676 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1677                                      const char *symbol_name, u64 addr)
1678 {
1679         char *bracket;
1680         enum map_type i;
1681         struct ref_reloc_sym *ref;
1682
1683         ref = zalloc(sizeof(struct ref_reloc_sym));
1684         if (ref == NULL)
1685                 return -ENOMEM;
1686
1687         ref->name = strdup(symbol_name);
1688         if (ref->name == NULL) {
1689                 free(ref);
1690                 return -ENOMEM;
1691         }
1692
1693         bracket = strchr(ref->name, ']');
1694         if (bracket)
1695                 *bracket = '\0';
1696
1697         ref->addr = addr;
1698
1699         for (i = 0; i < MAP__NR_TYPES; ++i) {
1700                 struct kmap *kmap = map__kmap(maps[i]);
1701
1702                 if (!kmap)
1703                         continue;
1704                 kmap->ref_reloc_sym = ref;
1705         }
1706
1707         return 0;
1708 }
1709
1710 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1711 {
1712         return machines__fprintf_dsos(&session->machines, fp);
1713 }
1714
1715 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1716                                           bool (skip)(struct dso *dso, int parm), int parm)
1717 {
1718         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1719 }
1720
1721 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1722 {
1723         size_t ret;
1724         const char *msg = "";
1725
1726         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1727                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1728
1729         ret = fprintf(fp, "Aggregated stats:%s\n", msg);
1730
1731         ret += events_stats__fprintf(&session->evlist->stats, fp);
1732         return ret;
1733 }
1734
1735 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1736 {
1737         /*
1738          * FIXME: Here we have to actually print all the machines in this
1739          * session, not just the host...
1740          */
1741         return machine__fprintf(&session->machines.host, fp);
1742 }
1743
1744 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1745                                               unsigned int type)
1746 {
1747         struct perf_evsel *pos;
1748
1749         evlist__for_each(session->evlist, pos) {
1750                 if (pos->attr.type == type)
1751                         return pos;
1752         }
1753         return NULL;
1754 }
1755
1756 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1757                           struct addr_location *al,
1758                           unsigned int print_opts, unsigned int stack_depth)
1759 {
1760         struct callchain_cursor_node *node;
1761         int print_ip = print_opts & PRINT_IP_OPT_IP;
1762         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1763         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1764         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1765         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1766         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1767         char s = print_oneline ? ' ' : '\t';
1768
1769         if (symbol_conf.use_callchain && sample->callchain) {
1770                 struct addr_location node_al;
1771
1772                 if (thread__resolve_callchain(al->thread, evsel,
1773                                               sample, NULL, NULL,
1774                                               PERF_MAX_STACK_DEPTH) != 0) {
1775                         if (verbose)
1776                                 error("Failed to resolve callchain. Skipping\n");
1777                         return;
1778                 }
1779                 callchain_cursor_commit(&callchain_cursor);
1780
1781                 if (print_symoffset)
1782                         node_al = *al;
1783
1784                 while (stack_depth) {
1785                         u64 addr = 0;
1786
1787                         node = callchain_cursor_current(&callchain_cursor);
1788                         if (!node)
1789                                 break;
1790
1791                         if (node->sym && node->sym->ignore)
1792                                 goto next;
1793
1794                         if (print_ip)
1795                                 printf("%c%16" PRIx64, s, node->ip);
1796
1797                         if (node->map)
1798                                 addr = node->map->map_ip(node->map, node->ip);
1799
1800                         if (print_sym) {
1801                                 printf(" ");
1802                                 if (print_symoffset) {
1803                                         node_al.addr = addr;
1804                                         node_al.map  = node->map;
1805                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1806                                 } else
1807                                         symbol__fprintf_symname(node->sym, stdout);
1808                         }
1809
1810                         if (print_dso) {
1811                                 printf(" (");
1812                                 map__fprintf_dsoname(node->map, stdout);
1813                                 printf(")");
1814                         }
1815
1816                         if (print_srcline)
1817                                 map__fprintf_srcline(node->map, addr, "\n  ",
1818                                                      stdout);
1819
1820                         if (!print_oneline)
1821                                 printf("\n");
1822
1823                         stack_depth--;
1824 next:
1825                         callchain_cursor_advance(&callchain_cursor);
1826                 }
1827
1828         } else {
1829                 if (al->sym && al->sym->ignore)
1830                         return;
1831
1832                 if (print_ip)
1833                         printf("%16" PRIx64, sample->ip);
1834
1835                 if (print_sym) {
1836                         printf(" ");
1837                         if (print_symoffset)
1838                                 symbol__fprintf_symname_offs(al->sym, al,
1839                                                              stdout);
1840                         else
1841                                 symbol__fprintf_symname(al->sym, stdout);
1842                 }
1843
1844                 if (print_dso) {
1845                         printf(" (");
1846                         map__fprintf_dsoname(al->map, stdout);
1847                         printf(")");
1848                 }
1849
1850                 if (print_srcline)
1851                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
1852         }
1853 }
1854
1855 int perf_session__cpu_bitmap(struct perf_session *session,
1856                              const char *cpu_list, unsigned long *cpu_bitmap)
1857 {
1858         int i, err = -1;
1859         struct cpu_map *map;
1860
1861         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1862                 struct perf_evsel *evsel;
1863
1864                 evsel = perf_session__find_first_evtype(session, i);
1865                 if (!evsel)
1866                         continue;
1867
1868                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1869                         pr_err("File does not contain CPU events. "
1870                                "Remove -c option to proceed.\n");
1871                         return -1;
1872                 }
1873         }
1874
1875         map = cpu_map__new(cpu_list);
1876         if (map == NULL) {
1877                 pr_err("Invalid cpu_list\n");
1878                 return -1;
1879         }
1880
1881         for (i = 0; i < map->nr; i++) {
1882                 int cpu = map->map[i];
1883
1884                 if (cpu >= MAX_NR_CPUS) {
1885                         pr_err("Requested CPU %d too large. "
1886                                "Consider raising MAX_NR_CPUS\n", cpu);
1887                         goto out_delete_map;
1888                 }
1889
1890                 set_bit(cpu, cpu_bitmap);
1891         }
1892
1893         err = 0;
1894
1895 out_delete_map:
1896         cpu_map__delete(map);
1897         return err;
1898 }
1899
1900 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1901                                 bool full)
1902 {
1903         struct stat st;
1904         int fd, ret;
1905
1906         if (session == NULL || fp == NULL)
1907                 return;
1908
1909         fd = perf_data_file__fd(session->file);
1910
1911         ret = fstat(fd, &st);
1912         if (ret == -1)
1913                 return;
1914
1915         fprintf(fp, "# ========\n");
1916         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1917         perf_header__fprintf_info(session, fp, full);
1918         fprintf(fp, "# ========\n#\n");
1919 }
1920
1921
1922 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1923                                              const struct perf_evsel_str_handler *assocs,
1924                                              size_t nr_assocs)
1925 {
1926         struct perf_evsel *evsel;
1927         size_t i;
1928         int err;
1929
1930         for (i = 0; i < nr_assocs; i++) {
1931                 /*
1932                  * Adding a handler for an event not in the session,
1933                  * just ignore it.
1934                  */
1935                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1936                 if (evsel == NULL)
1937                         continue;
1938
1939                 err = -EEXIST;
1940                 if (evsel->handler != NULL)
1941                         goto out;
1942                 evsel->handler = assocs[i].handler;
1943         }
1944
1945         err = 0;
1946 out:
1947         return err;
1948 }
1949
1950 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
1951                                  union perf_event *event,
1952                                  struct perf_session *session)
1953 {
1954         struct perf_evlist *evlist = session->evlist;
1955         struct id_index_event *ie = &event->id_index;
1956         size_t i, nr, max_nr;
1957
1958         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
1959                  sizeof(struct id_index_entry);
1960         nr = ie->nr;
1961         if (nr > max_nr)
1962                 return -EINVAL;
1963
1964         if (dump_trace)
1965                 fprintf(stdout, " nr: %zu\n", nr);
1966
1967         for (i = 0; i < nr; i++) {
1968                 struct id_index_entry *e = &ie->entries[i];
1969                 struct perf_sample_id *sid;
1970
1971                 if (dump_trace) {
1972                         fprintf(stdout, " ... id: %"PRIu64, e->id);
1973                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
1974                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
1975                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
1976                 }
1977
1978                 sid = perf_evlist__id2sid(evlist, e->id);
1979                 if (!sid)
1980                         return -ENOENT;
1981                 sid->idx = e->idx;
1982                 sid->cpu = e->cpu;
1983                 sid->tid = e->tid;
1984         }
1985         return 0;
1986 }
1987
1988 int perf_event__synthesize_id_index(struct perf_tool *tool,
1989                                     perf_event__handler_t process,
1990                                     struct perf_evlist *evlist,
1991                                     struct machine *machine)
1992 {
1993         union perf_event *ev;
1994         struct perf_evsel *evsel;
1995         size_t nr = 0, i = 0, sz, max_nr, n;
1996         int err;
1997
1998         pr_debug2("Synthesizing id index\n");
1999
2000         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2001                  sizeof(struct id_index_entry);
2002
2003         evlist__for_each(evlist, evsel)
2004                 nr += evsel->ids;
2005
2006         n = nr > max_nr ? max_nr : nr;
2007         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2008         ev = zalloc(sz);
2009         if (!ev)
2010                 return -ENOMEM;
2011
2012         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2013         ev->id_index.header.size = sz;
2014         ev->id_index.nr = n;
2015
2016         evlist__for_each(evlist, evsel) {
2017                 u32 j;
2018
2019                 for (j = 0; j < evsel->ids; j++) {
2020                         struct id_index_entry *e;
2021                         struct perf_sample_id *sid;
2022
2023                         if (i >= n) {
2024                                 err = process(tool, ev, NULL, machine);
2025                                 if (err)
2026                                         goto out_err;
2027                                 nr -= n;
2028                                 i = 0;
2029                         }
2030
2031                         e = &ev->id_index.entries[i++];
2032
2033                         e->id = evsel->id[j];
2034
2035                         sid = perf_evlist__id2sid(evlist, e->id);
2036                         if (!sid) {
2037                                 free(ev);
2038                                 return -ENOENT;
2039                         }
2040
2041                         e->idx = sid->idx;
2042                         e->cpu = sid->cpu;
2043                         e->tid = sid->tid;
2044                 }
2045         }
2046
2047         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2048         ev->id_index.header.size = sz;
2049         ev->id_index.nr = nr;
2050
2051         err = process(tool, ev, NULL, machine);
2052 out_err:
2053         free(ev);
2054
2055         return err;
2056 }