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__exit(struct perf_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->cmdline_argv);
 184         zfree(&env->sibling_cores);
 185         zfree(&env->sibling_threads);
 186         zfree(&env->numa_nodes);
 187         zfree(&env->pmu_mappings);
 188 }
 189
 190 void perf_session__delete(struct perf_session *session)
 191 {
 192         auxtrace__free(session);
 193         auxtrace_index__free(&session->auxtrace_index);
 194         perf_session__destroy_kernel_maps(session);
 195         perf_session__delete_threads(session);
 196         perf_session_env__exit(&session->header.env);
 197         machines__exit(&session->machines);
 198         if (session->file)
 199                 perf_data_file__close(session->file);
 200         free(session);
 201 }
 202
 203 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 204                                                  __maybe_unused,
 205                                                  union perf_event *event
 206                                                  __maybe_unused,
 207                                                  struct perf_session *session
 208                                                 __maybe_unused)
 209 {
 210         dump_printf(": unhandled!\n");
 211         return 0;
 212 }
 213
 214 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 215                                          union perf_event *event __maybe_unused,
 216                                          struct perf_evlist **pevlist
 217                                          __maybe_unused)
 218 {
 219         dump_printf(": unhandled!\n");
 220         return 0;
 221 }
 222
 223 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 224                                      union perf_event *event __maybe_unused,
 225                                      struct perf_sample *sample __maybe_unused,
 226                                      struct perf_evsel *evsel __maybe_unused,
 227                                      struct machine *machine __maybe_unused)
 228 {
 229         dump_printf(": unhandled!\n");
 230         return 0;
 231 }
 232
 233 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 234                               union perf_event *event __maybe_unused,
 235                               struct perf_sample *sample __maybe_unused,
 236                               struct machine *machine __maybe_unused)
 237 {
 238         dump_printf(": unhandled!\n");
 239         return 0;
 240 }
 241
 242 static int process_build_id_stub(struct perf_tool *tool __maybe_unused,
 243                                  union perf_event *event __maybe_unused,
 244                                  struct perf_session *session __maybe_unused)
 245 {
 246         dump_printf(": unhandled!\n");
 247         return 0;
 248 }
 249
 250 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 251                                        union perf_event *event __maybe_unused,
 252                                        struct ordered_events *oe __maybe_unused)
 253 {
 254         dump_printf(": unhandled!\n");
 255         return 0;
 256 }
 257
 258 static int process_finished_round(struct perf_tool *tool,
 259                                   union perf_event *event,
 260                                   struct ordered_events *oe);
 261
 262 static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
 263                                  union perf_event *event __maybe_unused,
 264                                  struct perf_session *perf_session
 265                                  __maybe_unused)
 266 {
 267         dump_printf(": unhandled!\n");
 268         return 0;
 269 }
 270
 271 static int process_event_auxtrace_info_stub(struct perf_tool *tool __maybe_unused,
 272                                 union perf_event *event __maybe_unused,
 273                                 struct perf_session *session __maybe_unused)
 274 {
 275         dump_printf(": unhandled!\n");
 276         return 0;
 277 }
 278
 279 static int skipn(int fd, off_t n)
 280 {
 281         char buf[4096];
 282         ssize_t ret;
 283
 284         while (n > 0) {
 285                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 286                 if (ret <= 0)
 287                         return ret;
 288                 n -= ret;
 289         }
 290
 291         return 0;
 292 }
 293
 294 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
 295                                        union perf_event *event,
 296                                        struct perf_session *session
 297                                        __maybe_unused)
 298 {
 299         dump_printf(": unhandled!\n");
 300         if (perf_data_file__is_pipe(session->file))
 301                 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
 302         return event->auxtrace.size;
 303 }
 304
 305 static
 306 int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
 307                                       union perf_event *event __maybe_unused,
 308                                       struct perf_session *session __maybe_unused)
 309 {
 310         dump_printf(": unhandled!\n");
 311         return 0;
 312 }
 313
 314 void perf_tool__fill_defaults(struct perf_tool *tool)
 315 {
 316         if (tool->sample == NULL)
 317                 tool->sample = process_event_sample_stub;
 318         if (tool->mmap == NULL)
 319                 tool->mmap = process_event_stub;
 320         if (tool->mmap2 == NULL)
 321                 tool->mmap2 = process_event_stub;
 322         if (tool->comm == NULL)
 323                 tool->comm = process_event_stub;
 324         if (tool->fork == NULL)
 325                 tool->fork = process_event_stub;
 326         if (tool->exit == NULL)
 327                 tool->exit = process_event_stub;
 328         if (tool->lost == NULL)
 329                 tool->lost = perf_event__process_lost;
 330         if (tool->lost_samples == NULL)
 331                 tool->lost_samples = perf_event__process_lost_samples;
 332         if (tool->aux == NULL)
 333                 tool->aux = perf_event__process_aux;
 334         if (tool->itrace_start == NULL)
 335                 tool->itrace_start = perf_event__process_itrace_start;
 336         if (tool->context_switch == NULL)
 337                 tool->context_switch = perf_event__process_switch;
 338         if (tool->read == NULL)
 339                 tool->read = process_event_sample_stub;
 340         if (tool->throttle == NULL)
 341                 tool->throttle = process_event_stub;
 342         if (tool->unthrottle == NULL)
 343                 tool->unthrottle = process_event_stub;
 344         if (tool->attr == NULL)
 345                 tool->attr = process_event_synth_attr_stub;
 346         if (tool->tracing_data == NULL)
 347                 tool->tracing_data = process_event_synth_tracing_data_stub;
 348         if (tool->build_id == NULL)
 349                 tool->build_id = process_build_id_stub;
 350         if (tool->finished_round == NULL) {
 351                 if (tool->ordered_events)
 352                         tool->finished_round = process_finished_round;
 353                 else
 354                         tool->finished_round = process_finished_round_stub;
 355         }
 356         if (tool->id_index == NULL)
 357                 tool->id_index = process_id_index_stub;
 358         if (tool->auxtrace_info == NULL)
 359                 tool->auxtrace_info = process_event_auxtrace_info_stub;
 360         if (tool->auxtrace == NULL)
 361                 tool->auxtrace = process_event_auxtrace_stub;
 362         if (tool->auxtrace_error == NULL)
 363                 tool->auxtrace_error = process_event_auxtrace_error_stub;
 364 }
 365
 366 static void swap_sample_id_all(union perf_event *event, void *data)
 367 {
 368         void *end = (void *) event + event->header.size;
 369         int size = end - data;
 370
 371         BUG_ON(size % sizeof(u64));
 372         mem_bswap_64(data, size);
 373 }
 374
 375 static void perf_event__all64_swap(union perf_event *event,
 376                                    bool sample_id_all __maybe_unused)
 377 {
 378         struct perf_event_header *hdr = &event->header;
 379         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 380 }
 381
 382 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 383 {
 384         event->comm.pid = bswap_32(event->comm.pid);
 385         event->comm.tid = bswap_32(event->comm.tid);
 386
 387         if (sample_id_all) {
 388                 void *data = &event->comm.comm;
 389
 390                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 391                 swap_sample_id_all(event, data);
 392         }
 393 }
 394
 395 static void perf_event__mmap_swap(union perf_event *event,
 396                                   bool sample_id_all)
 397 {
 398         event->mmap.pid   = bswap_32(event->mmap.pid);
 399         event->mmap.tid   = bswap_32(event->mmap.tid);
 400         event->mmap.start = bswap_64(event->mmap.start);
 401         event->mmap.len   = bswap_64(event->mmap.len);
 402         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 403
 404         if (sample_id_all) {
 405                 void *data = &event->mmap.filename;
 406
 407                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 408                 swap_sample_id_all(event, data);
 409         }
 410 }
 411
 412 static void perf_event__mmap2_swap(union perf_event *event,
 413                                   bool sample_id_all)
 414 {
 415         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 416         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 417         event->mmap2.start = bswap_64(event->mmap2.start);
 418         event->mmap2.len   = bswap_64(event->mmap2.len);
 419         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 420         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 421         event->mmap2.min   = bswap_32(event->mmap2.min);
 422         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 423
 424         if (sample_id_all) {
 425                 void *data = &event->mmap2.filename;
 426
 427                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 428                 swap_sample_id_all(event, data);
 429         }
 430 }
 431 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 432 {
 433         event->fork.pid  = bswap_32(event->fork.pid);
 434         event->fork.tid  = bswap_32(event->fork.tid);
 435         event->fork.ppid = bswap_32(event->fork.ppid);
 436         event->fork.ptid = bswap_32(event->fork.ptid);
 437         event->fork.time = bswap_64(event->fork.time);
 438
 439         if (sample_id_all)
 440                 swap_sample_id_all(event, &event->fork + 1);
 441 }
 442
 443 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 444 {
 445         event->read.pid          = bswap_32(event->read.pid);
 446         event->read.tid          = bswap_32(event->read.tid);
 447         event->read.value        = bswap_64(event->read.value);
 448         event->read.time_enabled = bswap_64(event->read.time_enabled);
 449         event->read.time_running = bswap_64(event->read.time_running);
 450         event->read.id           = bswap_64(event->read.id);
 451
 452         if (sample_id_all)
 453                 swap_sample_id_all(event, &event->read + 1);
 454 }
 455
 456 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 457 {
 458         event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 459         event->aux.aux_size   = bswap_64(event->aux.aux_size);
 460         event->aux.flags      = bswap_64(event->aux.flags);
 461
 462         if (sample_id_all)
 463                 swap_sample_id_all(event, &event->aux + 1);
 464 }
 465
 466 static void perf_event__itrace_start_swap(union perf_event *event,
 467                                           bool sample_id_all)
 468 {
 469         event->itrace_start.pid  = bswap_32(event->itrace_start.pid);
 470         event->itrace_start.tid  = bswap_32(event->itrace_start.tid);
 471
 472         if (sample_id_all)
 473                 swap_sample_id_all(event, &event->itrace_start + 1);
 474 }
 475
 476 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 477 {
 478         if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 479                 event->context_switch.next_prev_pid =
 480                                 bswap_32(event->context_switch.next_prev_pid);
 481                 event->context_switch.next_prev_tid =
 482                                 bswap_32(event->context_switch.next_prev_tid);
 483         }
 484
 485         if (sample_id_all)
 486                 swap_sample_id_all(event, &event->context_switch + 1);
 487 }
 488
 489 static void perf_event__throttle_swap(union perf_event *event,
 490                                       bool sample_id_all)
 491 {
 492         event->throttle.time      = bswap_64(event->throttle.time);
 493         event->throttle.id        = bswap_64(event->throttle.id);
 494         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 495
 496         if (sample_id_all)
 497                 swap_sample_id_all(event, &event->throttle + 1);
 498 }
 499
 500 static u8 revbyte(u8 b)
 501 {
 502         int rev = (b >> 4) | ((b & 0xf) << 4);
 503         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 504         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 505         return (u8) rev;
 506 }
 507
 508 /*
 509  * XXX this is hack in attempt to carry flags bitfield
 510  * throught endian village. ABI says:
 511  *
 512  * Bit-fields are allocated from right to left (least to most significant)
 513  * on little-endian implementations and from left to right (most to least
 514  * significant) on big-endian implementations.
 515  *
 516  * The above seems to be byte specific, so we need to reverse each
 517  * byte of the bitfield. 'Internet' also says this might be implementation
 518  * specific and we probably need proper fix and carry perf_event_attr
 519  * bitfield flags in separate data file FEAT_ section. Thought this seems
 520  * to work for now.
 521  */
 522 static void swap_bitfield(u8 *p, unsigned len)
 523 {
 524         unsigned i;
 525
 526         for (i = 0; i < len; i++) {
 527                 *p = revbyte(*p);
 528                 p++;
 529         }
 530 }
 531
 532 /* exported for swapping attributes in file header */
 533 void perf_event__attr_swap(struct perf_event_attr *attr)
 534 {
 535         attr->type              = bswap_32(attr->type);
 536         attr->size              = bswap_32(attr->size);
 537
 538 #define bswap_safe(f, n)                                        \
 539         (attr->size > (offsetof(struct perf_event_attr, f) +    \
 540                        sizeof(attr->f) * (n)))
 541 #define bswap_field(f, sz)                      \
 542 do {                                            \
 543         if (bswap_safe(f, 0))                   \
 544                 attr->f = bswap_##sz(attr->f);  \
 545 } while(0)
 546 #define bswap_field_32(f) bswap_field(f, 32)
 547 #define bswap_field_64(f) bswap_field(f, 64)
 548
 549         bswap_field_64(config);
 550         bswap_field_64(sample_period);
 551         bswap_field_64(sample_type);
 552         bswap_field_64(read_format);
 553         bswap_field_32(wakeup_events);
 554         bswap_field_32(bp_type);
 555         bswap_field_64(bp_addr);
 556         bswap_field_64(bp_len);
 557         bswap_field_64(branch_sample_type);
 558         bswap_field_64(sample_regs_user);
 559         bswap_field_32(sample_stack_user);
 560         bswap_field_32(aux_watermark);
 561
 562         /*
 563          * After read_format are bitfields. Check read_format because
 564          * we are unable to use offsetof on bitfield.
 565          */
 566         if (bswap_safe(read_format, 1))
 567                 swap_bitfield((u8 *) (&attr->read_format + 1),
 568                               sizeof(u64));
 569 #undef bswap_field_64
 570 #undef bswap_field_32
 571 #undef bswap_field
 572 #undef bswap_safe
 573 }
 574
 575 static void perf_event__hdr_attr_swap(union perf_event *event,
 576                                       bool sample_id_all __maybe_unused)
 577 {
 578         size_t size;
 579
 580         perf_event__attr_swap(&event->attr.attr);
 581
 582         size = event->header.size;
 583         size -= (void *)&event->attr.id - (void *)event;
 584         mem_bswap_64(event->attr.id, size);
 585 }
 586
 587 static void perf_event__event_type_swap(union perf_event *event,
 588                                         bool sample_id_all __maybe_unused)
 589 {
 590         event->event_type.event_type.event_id =
 591                 bswap_64(event->event_type.event_type.event_id);
 592 }
 593
 594 static void perf_event__tracing_data_swap(union perf_event *event,
 595                                           bool sample_id_all __maybe_unused)
 596 {
 597         event->tracing_data.size = bswap_32(event->tracing_data.size);
 598 }
 599
 600 static void perf_event__auxtrace_info_swap(union perf_event *event,
 601                                            bool sample_id_all __maybe_unused)
 602 {
 603         size_t size;
 604
 605         event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 606
 607         size = event->header.size;
 608         size -= (void *)&event->auxtrace_info.priv - (void *)event;
 609         mem_bswap_64(event->auxtrace_info.priv, size);
 610 }
 611
 612 static void perf_event__auxtrace_swap(union perf_event *event,
 613                                       bool sample_id_all __maybe_unused)
 614 {
 615         event->auxtrace.size      = bswap_64(event->auxtrace.size);
 616         event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 617         event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 618         event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 619         event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 620         event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 621 }
 622
 623 static void perf_event__auxtrace_error_swap(union perf_event *event,
 624                                             bool sample_id_all __maybe_unused)
 625 {
 626         event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 627         event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 628         event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 629         event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 630         event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 631         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 632 }
 633
 634 typedef void (*perf_event__swap_op)(union perf_event *event,
 635                                     bool sample_id_all);
 636
 637 static perf_event__swap_op perf_event__swap_ops[] = {
 638         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 639         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 640         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 641         [PERF_RECORD_FORK]                = perf_event__task_swap,
 642         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 643         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 644         [PERF_RECORD_READ]                = perf_event__read_swap,
 645         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 646         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 647         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 648         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
 649         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
 650         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
 651         [PERF_RECORD_SWITCH]              = perf_event__switch_swap,
 652         [PERF_RECORD_SWITCH_CPU_WIDE]     = perf_event__switch_swap,
 653         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 654         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 655         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 656         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 657         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
 658         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
 659         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
 660         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
 661         [PERF_RECORD_HEADER_MAX]          = NULL,
 662 };
 663
 664 /*
 665  * When perf record finishes a pass on every buffers, it records this pseudo
 666  * event.
 667  * We record the max timestamp t found in the pass n.
 668  * Assuming these timestamps are monotonic across cpus, we know that if
 669  * a buffer still has events with timestamps below t, they will be all
 670  * available and then read in the pass n + 1.
 671  * Hence when we start to read the pass n + 2, we can safely flush every
 672  * events with timestamps below t.
 673  *
 674  *    ============ PASS n =================
 675  *       CPU 0         |   CPU 1
 676  *                     |
 677  *    cnt1 timestamps  |   cnt2 timestamps
 678  *          1          |         2
 679  *          2          |         3
 680  *          -          |         4  <--- max recorded
 681  *
 682  *    ============ PASS n + 1 ==============
 683  *       CPU 0         |   CPU 1
 684  *                     |
 685  *    cnt1 timestamps  |   cnt2 timestamps
 686  *          3          |         5
 687  *          4          |         6
 688  *          5          |         7 <---- max recorded
 689  *
 690  *      Flush every events below timestamp 4
 691  *
 692  *    ============ PASS n + 2 ==============
 693  *       CPU 0         |   CPU 1
 694  *                     |
 695  *    cnt1 timestamps  |   cnt2 timestamps
 696  *          6          |         8
 697  *          7          |         9
 698  *          -          |         10
 699  *
 700  *      Flush every events below timestamp 7
 701  *      etc...
 702  */
 703 static int process_finished_round(struct perf_tool *tool __maybe_unused,
 704                                   union perf_event *event __maybe_unused,
 705                                   struct ordered_events *oe)
 706 {
 707         if (dump_trace)
 708                 fprintf(stdout, "\n");
 709         return ordered_events__flush(oe, OE_FLUSH__ROUND);
 710 }
 711
 712 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
 713                               struct perf_sample *sample, u64 file_offset)
 714 {
 715         return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
 716 }
 717
 718 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 719 {
 720         struct ip_callchain *callchain = sample->callchain;
 721         struct branch_stack *lbr_stack = sample->branch_stack;
 722         u64 kernel_callchain_nr = callchain->nr;
 723         unsigned int i;
 724
 725         for (i = 0; i < kernel_callchain_nr; i++) {
 726                 if (callchain->ips[i] == PERF_CONTEXT_USER)
 727                         break;
 728         }
 729
 730         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 731                 u64 total_nr;
 732                 /*
 733                  * LBR callstack can only get user call chain,
 734                  * i is kernel call chain number,
 735                  * 1 is PERF_CONTEXT_USER.
 736                  *
 737                  * The user call chain is stored in LBR registers.
 738                  * LBR are pair registers. The caller is stored
 739                  * in "from" register, while the callee is stored
 740                  * in "to" register.
 741                  * For example, there is a call stack
 742                  * "A"->"B"->"C"->"D".
 743                  * The LBR registers will recorde like
 744                  * "C"->"D", "B"->"C", "A"->"B".
 745                  * So only the first "to" register and all "from"
 746                  * registers are needed to construct the whole stack.
 747                  */
 748                 total_nr = i + 1 + lbr_stack->nr + 1;
 749                 kernel_callchain_nr = i + 1;
 750
 751                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 752
 753                 for (i = 0; i < kernel_callchain_nr; i++)
 754                         printf("..... %2d: %016" PRIx64 "\n",
 755                                i, callchain->ips[i]);
 756
 757                 printf("..... %2d: %016" PRIx64 "\n",
 758                        (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 759                 for (i = 0; i < lbr_stack->nr; i++)
 760                         printf("..... %2d: %016" PRIx64 "\n",
 761                                (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 762         }
 763 }
 764
 765 static void callchain__printf(struct perf_evsel *evsel,
 766                               struct perf_sample *sample)
 767 {
 768         unsigned int i;
 769         struct ip_callchain *callchain = sample->callchain;
 770
 771         if (has_branch_callstack(evsel))
 772                 callchain__lbr_callstack_printf(sample);
 773
 774         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 775
 776         for (i = 0; i < callchain->nr; i++)
 777                 printf("..... %2d: %016" PRIx64 "\n",
 778                        i, callchain->ips[i]);
 779 }
 780
 781 static void branch_stack__printf(struct perf_sample *sample)
 782 {
 783         uint64_t i;
 784
 785         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 786
 787         for (i = 0; i < sample->branch_stack->nr; i++) {
 788                 struct branch_entry *e = &sample->branch_stack->entries[i];
 789
 790                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
 791                         i, e->from, e->to,
 792                         e->flags.cycles,
 793                         e->flags.mispred ? "M" : " ",
 794                         e->flags.predicted ? "P" : " ",
 795                         e->flags.abort ? "A" : " ",
 796                         e->flags.in_tx ? "T" : " ",
 797                         (unsigned)e->flags.reserved);
 798         }
 799 }
 800
 801 static void regs_dump__printf(u64 mask, u64 *regs)
 802 {
 803         unsigned rid, i = 0;
 804
 805         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 806                 u64 val = regs[i++];
 807
 808                 printf(".... %-5s 0x%" PRIx64 "\n",
 809                        perf_reg_name(rid), val);
 810         }
 811 }
 812
 813 static const char *regs_abi[] = {
 814         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
 815         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 816         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 817 };
 818
 819 static inline const char *regs_dump_abi(struct regs_dump *d)
 820 {
 821         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 822                 return "unknown";
 823
 824         return regs_abi[d->abi];
 825 }
 826
 827 static void regs__printf(const char *type, struct regs_dump *regs)
 828 {
 829         u64 mask = regs->mask;
 830
 831         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 832                type,
 833                mask,
 834                regs_dump_abi(regs));
 835
 836         regs_dump__printf(mask, regs->regs);
 837 }
 838
 839 static void regs_user__printf(struct perf_sample *sample)
 840 {
 841         struct regs_dump *user_regs = &sample->user_regs;
 842
 843         if (user_regs->regs)
 844                 regs__printf("user", user_regs);
 845 }
 846
 847 static void regs_intr__printf(struct perf_sample *sample)
 848 {
 849         struct regs_dump *intr_regs = &sample->intr_regs;
 850
 851         if (intr_regs->regs)
 852                 regs__printf("intr", intr_regs);
 853 }
 854
 855 static void stack_user__printf(struct stack_dump *dump)
 856 {
 857         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 858                dump->size, dump->offset);
 859 }
 860
 861 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
 862                                        union perf_event *event,
 863                                        struct perf_sample *sample)
 864 {
 865         u64 sample_type = __perf_evlist__combined_sample_type(evlist);
 866
 867         if (event->header.type != PERF_RECORD_SAMPLE &&
 868             !perf_evlist__sample_id_all(evlist)) {
 869                 fputs("-1 -1 ", stdout);
 870                 return;
 871         }
 872
 873         if ((sample_type & PERF_SAMPLE_CPU))
 874                 printf("%u ", sample->cpu);
 875
 876         if (sample_type & PERF_SAMPLE_TIME)
 877                 printf("%" PRIu64 " ", sample->time);
 878 }
 879
 880 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
 881 {
 882         printf("... sample_read:\n");
 883
 884         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
 885                 printf("...... time enabled %016" PRIx64 "\n",
 886                        sample->read.time_enabled);
 887
 888         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
 889                 printf("...... time running %016" PRIx64 "\n",
 890                        sample->read.time_running);
 891
 892         if (read_format & PERF_FORMAT_GROUP) {
 893                 u64 i;
 894
 895                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
 896
 897                 for (i = 0; i < sample->read.group.nr; i++) {
 898                         struct sample_read_value *value;
 899
 900                         value = &sample->read.group.values[i];
 901                         printf("..... id %016" PRIx64
 902                                ", value %016" PRIx64 "\n",
 903                                value->id, value->value);
 904                 }
 905         } else
 906                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
 907                         sample->read.one.id, sample->read.one.value);
 908 }
 909
 910 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
 911                        u64 file_offset, struct perf_sample *sample)
 912 {
 913         if (!dump_trace)
 914                 return;
 915
 916         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 917                file_offset, event->header.size, event->header.type);
 918
 919         trace_event(event);
 920
 921         if (sample)
 922                 perf_evlist__print_tstamp(evlist, event, sample);
 923
 924         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 925                event->header.size, perf_event__name(event->header.type));
 926 }
 927
 928 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 929                         struct perf_sample *sample)
 930 {
 931         u64 sample_type;
 932
 933         if (!dump_trace)
 934                 return;
 935
 936         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 937                event->header.misc, sample->pid, sample->tid, sample->ip,
 938                sample->period, sample->addr);
 939
 940         sample_type = evsel->attr.sample_type;
 941
 942         if (sample_type & PERF_SAMPLE_CALLCHAIN)
 943                 callchain__printf(evsel, sample);
 944
 945         if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
 946                 branch_stack__printf(sample);
 947
 948         if (sample_type & PERF_SAMPLE_REGS_USER)
 949                 regs_user__printf(sample);
 950
 951         if (sample_type & PERF_SAMPLE_REGS_INTR)
 952                 regs_intr__printf(sample);
 953
 954         if (sample_type & PERF_SAMPLE_STACK_USER)
 955                 stack_user__printf(&sample->user_stack);
 956
 957         if (sample_type & PERF_SAMPLE_WEIGHT)
 958                 printf("... weight: %" PRIu64 "\n", sample->weight);
 959
 960         if (sample_type & PERF_SAMPLE_DATA_SRC)
 961                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
 962
 963         if (sample_type & PERF_SAMPLE_TRANSACTION)
 964                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
 965
 966         if (sample_type & PERF_SAMPLE_READ)
 967                 sample_read__printf(sample, evsel->attr.read_format);
 968 }
 969
 970 static struct machine *machines__find_for_cpumode(struct machines *machines,
 971                                                union perf_event *event,
 972                                                struct perf_sample *sample)
 973 {
 974         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 975         struct machine *machine;
 976
 977         if (perf_guest &&
 978             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
 979              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
 980                 u32 pid;
 981
 982                 if (event->header.type == PERF_RECORD_MMAP
 983                     || event->header.type == PERF_RECORD_MMAP2)
 984                         pid = event->mmap.pid;
 985                 else
 986                         pid = sample->pid;
 987
 988                 machine = machines__find(machines, pid);
 989                 if (!machine)
 990                         machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID);
 991                 return machine;
 992         }
 993
 994         return &machines->host;
 995 }
 996
 997 static int deliver_sample_value(struct perf_evlist *evlist,
 998                                 struct perf_tool *tool,
 999                                 union perf_event *event,
1000                                 struct perf_sample *sample,
1001                                 struct sample_read_value *v,
1002                                 struct machine *machine)
1003 {
1004         struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1005
1006         if (sid) {
1007                 sample->id     = v->id;
1008                 sample->period = v->value - sid->period;
1009                 sid->period    = v->value;
1010         }
1011
1012         if (!sid || sid->evsel == NULL) {
1013                 ++evlist->stats.nr_unknown_id;
1014                 return 0;
1015         }
1016
1017         return tool->sample(tool, event, sample, sid->evsel, machine);
1018 }
1019
1020 static int deliver_sample_group(struct perf_evlist *evlist,
1021                                 struct perf_tool *tool,
1022                                 union  perf_event *event,
1023                                 struct perf_sample *sample,
1024                                 struct machine *machine)
1025 {
1026         int ret = -EINVAL;
1027         u64 i;
1028
1029         for (i = 0; i < sample->read.group.nr; i++) {
1030                 ret = deliver_sample_value(evlist, tool, event, sample,
1031                                            &sample->read.group.values[i],
1032                                            machine);
1033                 if (ret)
1034                         break;
1035         }
1036
1037         return ret;
1038 }
1039
1040 static int
1041  perf_evlist__deliver_sample(struct perf_evlist *evlist,
1042                              struct perf_tool *tool,
1043                              union  perf_event *event,
1044                              struct perf_sample *sample,
1045                              struct perf_evsel *evsel,
1046                              struct machine *machine)
1047 {
1048         /* We know evsel != NULL. */
1049         u64 sample_type = evsel->attr.sample_type;
1050         u64 read_format = evsel->attr.read_format;
1051
1052         /* Standard sample delievery. */
1053         if (!(sample_type & PERF_SAMPLE_READ))
1054                 return tool->sample(tool, event, sample, evsel, machine);
1055
1056         /* For PERF_SAMPLE_READ we have either single or group mode. */
1057         if (read_format & PERF_FORMAT_GROUP)
1058                 return deliver_sample_group(evlist, tool, event, sample,
1059                                             machine);
1060         else
1061                 return deliver_sample_value(evlist, tool, event, sample,
1062                                             &sample->read.one, machine);
1063 }
1064
1065 static int machines__deliver_event(struct machines *machines,
1066                                    struct perf_evlist *evlist,
1067                                    union perf_event *event,
1068                                    struct perf_sample *sample,
1069                                    struct perf_tool *tool, u64 file_offset)
1070 {
1071         struct perf_evsel *evsel;
1072         struct machine *machine;
1073
1074         dump_event(evlist, event, file_offset, sample);
1075
1076         evsel = perf_evlist__id2evsel(evlist, sample->id);
1077
1078         machine = machines__find_for_cpumode(machines, event, sample);
1079
1080         switch (event->header.type) {
1081         case PERF_RECORD_SAMPLE:
1082                 dump_sample(evsel, event, sample);
1083                 if (evsel == NULL) {
1084                         ++evlist->stats.nr_unknown_id;
1085                         return 0;
1086                 }
1087                 if (machine == NULL) {
1088                         ++evlist->stats.nr_unprocessable_samples;
1089                         return 0;
1090                 }
1091                 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1092         case PERF_RECORD_MMAP:
1093                 return tool->mmap(tool, event, sample, machine);
1094         case PERF_RECORD_MMAP2:
1095                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1096                         ++evlist->stats.nr_proc_map_timeout;
1097                 return tool->mmap2(tool, event, sample, machine);
1098         case PERF_RECORD_COMM:
1099                 return tool->comm(tool, event, sample, machine);
1100         case PERF_RECORD_FORK:
1101                 return tool->fork(tool, event, sample, machine);
1102         case PERF_RECORD_EXIT:
1103                 return tool->exit(tool, event, sample, machine);
1104         case PERF_RECORD_LOST:
1105                 if (tool->lost == perf_event__process_lost)
1106                         evlist->stats.total_lost += event->lost.lost;
1107                 return tool->lost(tool, event, sample, machine);
1108         case PERF_RECORD_LOST_SAMPLES:
1109                 if (tool->lost_samples == perf_event__process_lost_samples)
1110                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1111                 return tool->lost_samples(tool, event, sample, machine);
1112         case PERF_RECORD_READ:
1113                 return tool->read(tool, event, sample, evsel, machine);
1114         case PERF_RECORD_THROTTLE:
1115                 return tool->throttle(tool, event, sample, machine);
1116         case PERF_RECORD_UNTHROTTLE:
1117                 return tool->unthrottle(tool, event, sample, machine);
1118         case PERF_RECORD_AUX:
1119                 return tool->aux(tool, event, sample, machine);
1120         case PERF_RECORD_ITRACE_START:
1121                 return tool->itrace_start(tool, event, sample, machine);
1122         case PERF_RECORD_SWITCH:
1123         case PERF_RECORD_SWITCH_CPU_WIDE:
1124                 return tool->context_switch(tool, event, sample, machine);
1125         default:
1126                 ++evlist->stats.nr_unknown_events;
1127                 return -1;
1128         }
1129 }
1130
1131 static int perf_session__deliver_event(struct perf_session *session,
1132                                        union perf_event *event,
1133                                        struct perf_sample *sample,
1134                                        struct perf_tool *tool,
1135                                        u64 file_offset)
1136 {
1137         int ret;
1138
1139         ret = auxtrace__process_event(session, event, sample, tool);
1140         if (ret < 0)
1141                 return ret;
1142         if (ret > 0)
1143                 return 0;
1144
1145         return machines__deliver_event(&session->machines, session->evlist,
1146                                        event, sample, tool, file_offset);
1147 }
1148
1149 static s64 perf_session__process_user_event(struct perf_session *session,
1150                                             union perf_event *event,
1151                                             u64 file_offset)
1152 {
1153         struct ordered_events *oe = &session->ordered_events;
1154         struct perf_tool *tool = session->tool;
1155         int fd = perf_data_file__fd(session->file);
1156         int err;
1157
1158         dump_event(session->evlist, event, file_offset, NULL);
1159
1160         /* These events are processed right away */
1161         switch (event->header.type) {
1162         case PERF_RECORD_HEADER_ATTR:
1163                 err = tool->attr(tool, event, &session->evlist);
1164                 if (err == 0) {
1165                         perf_session__set_id_hdr_size(session);
1166                         perf_session__set_comm_exec(session);
1167                 }
1168                 return err;
1169         case PERF_RECORD_HEADER_EVENT_TYPE:
1170                 /*
1171                  * Depreceated, but we need to handle it for sake
1172                  * of old data files create in pipe mode.
1173                  */
1174                 return 0;
1175         case PERF_RECORD_HEADER_TRACING_DATA:
1176                 /* setup for reading amidst mmap */
1177                 lseek(fd, file_offset, SEEK_SET);
1178                 return tool->tracing_data(tool, event, session);
1179         case PERF_RECORD_HEADER_BUILD_ID:
1180                 return tool->build_id(tool, event, session);
1181         case PERF_RECORD_FINISHED_ROUND:
1182                 return tool->finished_round(tool, event, oe);
1183         case PERF_RECORD_ID_INDEX:
1184                 return tool->id_index(tool, event, session);
1185         case PERF_RECORD_AUXTRACE_INFO:
1186                 return tool->auxtrace_info(tool, event, session);
1187         case PERF_RECORD_AUXTRACE:
1188                 /* setup for reading amidst mmap */
1189                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1190                 return tool->auxtrace(tool, event, session);
1191         case PERF_RECORD_AUXTRACE_ERROR:
1192                 perf_session__auxtrace_error_inc(session, event);
1193                 return tool->auxtrace_error(tool, event, session);
1194         default:
1195                 return -EINVAL;
1196         }
1197 }
1198
1199 int perf_session__deliver_synth_event(struct perf_session *session,
1200                                       union perf_event *event,
1201                                       struct perf_sample *sample)
1202 {
1203         struct perf_evlist *evlist = session->evlist;
1204         struct perf_tool *tool = session->tool;
1205
1206         events_stats__inc(&evlist->stats, event->header.type);
1207
1208         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1209                 return perf_session__process_user_event(session, event, 0);
1210
1211         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1212 }
1213
1214 static void event_swap(union perf_event *event, bool sample_id_all)
1215 {
1216         perf_event__swap_op swap;
1217
1218         swap = perf_event__swap_ops[event->header.type];
1219         if (swap)
1220                 swap(event, sample_id_all);
1221 }
1222
1223 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1224                              void *buf, size_t buf_sz,
1225                              union perf_event **event_ptr,
1226                              struct perf_sample *sample)
1227 {
1228         union perf_event *event;
1229         size_t hdr_sz, rest;
1230         int fd;
1231
1232         if (session->one_mmap && !session->header.needs_swap) {
1233                 event = file_offset - session->one_mmap_offset +
1234                         session->one_mmap_addr;
1235                 goto out_parse_sample;
1236         }
1237
1238         if (perf_data_file__is_pipe(session->file))
1239                 return -1;
1240
1241         fd = perf_data_file__fd(session->file);
1242         hdr_sz = sizeof(struct perf_event_header);
1243
1244         if (buf_sz < hdr_sz)
1245                 return -1;
1246
1247         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1248             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1249                 return -1;
1250
1251         event = (union perf_event *)buf;
1252
1253         if (session->header.needs_swap)
1254                 perf_event_header__bswap(&event->header);
1255
1256         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1257                 return -1;
1258
1259         rest = event->header.size - hdr_sz;
1260
1261         if (readn(fd, buf, rest) != (ssize_t)rest)
1262                 return -1;
1263
1264         if (session->header.needs_swap)
1265                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1266
1267 out_parse_sample:
1268
1269         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1270             perf_evlist__parse_sample(session->evlist, event, sample))
1271                 return -1;
1272
1273         *event_ptr = event;
1274
1275         return 0;
1276 }
1277
1278 static s64 perf_session__process_event(struct perf_session *session,
1279                                        union perf_event *event, u64 file_offset)
1280 {
1281         struct perf_evlist *evlist = session->evlist;
1282         struct perf_tool *tool = session->tool;
1283         struct perf_sample sample;
1284         int ret;
1285
1286         if (session->header.needs_swap)
1287                 event_swap(event, perf_evlist__sample_id_all(evlist));
1288
1289         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1290                 return -EINVAL;
1291
1292         events_stats__inc(&evlist->stats, event->header.type);
1293
1294         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1295                 return perf_session__process_user_event(session, event, file_offset);
1296
1297         /*
1298          * For all kernel events we get the sample data
1299          */
1300         ret = perf_evlist__parse_sample(evlist, event, &sample);
1301         if (ret)
1302                 return ret;
1303
1304         if (tool->ordered_events) {
1305                 ret = perf_session__queue_event(session, event, &sample, file_offset);
1306                 if (ret != -ETIME)
1307                         return ret;
1308         }
1309
1310         return perf_session__deliver_event(session, event, &sample, tool,
1311                                            file_offset);
1312 }
1313
1314 void perf_event_header__bswap(struct perf_event_header *hdr)
1315 {
1316         hdr->type = bswap_32(hdr->type);
1317         hdr->misc = bswap_16(hdr->misc);
1318         hdr->size = bswap_16(hdr->size);
1319 }
1320
1321 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1322 {
1323         return machine__findnew_thread(&session->machines.host, -1, pid);
1324 }
1325
1326 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1327 {
1328         struct thread *thread;
1329
1330         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1331         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1332                 pr_err("problem inserting idle task.\n");
1333                 thread = NULL;
1334         }
1335
1336         return thread;
1337 }
1338
1339 static void perf_session__warn_about_errors(const struct perf_session *session)
1340 {
1341         const struct events_stats *stats = &session->evlist->stats;
1342         const struct ordered_events *oe = &session->ordered_events;
1343
1344         if (session->tool->lost == perf_event__process_lost &&
1345             stats->nr_events[PERF_RECORD_LOST] != 0) {
1346                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1347                             "Check IO/CPU overload!\n\n",
1348                             stats->nr_events[0],
1349                             stats->nr_events[PERF_RECORD_LOST]);
1350         }
1351
1352         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1353                 double drop_rate;
1354
1355                 drop_rate = (double)stats->total_lost_samples /
1356                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1357                 if (drop_rate > 0.05) {
1358                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1359                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1360                                     drop_rate * 100.0);
1361                 }
1362         }
1363
1364         if (stats->nr_unknown_events != 0) {
1365                 ui__warning("Found %u unknown events!\n\n"
1366                             "Is this an older tool processing a perf.data "
1367                             "file generated by a more recent tool?\n\n"
1368                             "If that is not the case, consider "
1369                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1370                             stats->nr_unknown_events);
1371         }
1372
1373         if (stats->nr_unknown_id != 0) {
1374                 ui__warning("%u samples with id not present in the header\n",
1375                             stats->nr_unknown_id);
1376         }
1377
1378         if (stats->nr_invalid_chains != 0) {
1379                 ui__warning("Found invalid callchains!\n\n"
1380                             "%u out of %u events were discarded for this reason.\n\n"
1381                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1382                             stats->nr_invalid_chains,
1383                             stats->nr_events[PERF_RECORD_SAMPLE]);
1384         }
1385
1386         if (stats->nr_unprocessable_samples != 0) {
1387                 ui__warning("%u unprocessable samples recorded.\n"
1388                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1389                             stats->nr_unprocessable_samples);
1390         }
1391
1392         if (oe->nr_unordered_events != 0)
1393                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1394
1395         events_stats__auxtrace_error_warn(stats);
1396
1397         if (stats->nr_proc_map_timeout != 0) {
1398                 ui__warning("%d map information files for pre-existing threads were\n"
1399                             "not processed, if there are samples for addresses they\n"
1400                             "will not be resolved, you may find out which are these\n"
1401                             "threads by running with -v and redirecting the output\n"
1402                             "to a file.\n"
1403                             "The time limit to process proc map is too short?\n"
1404                             "Increase it by --proc-map-timeout\n",
1405                             stats->nr_proc_map_timeout);
1406         }
1407 }
1408
1409 static int perf_session__flush_thread_stack(struct thread *thread,
1410                                             void *p __maybe_unused)
1411 {
1412         return thread_stack__flush(thread);
1413 }
1414
1415 static int perf_session__flush_thread_stacks(struct perf_session *session)
1416 {
1417         return machines__for_each_thread(&session->machines,
1418                                          perf_session__flush_thread_stack,
1419                                          NULL);
1420 }
1421
1422 volatile int session_done;
1423
1424 static int __perf_session__process_pipe_events(struct perf_session *session)
1425 {
1426         struct ordered_events *oe = &session->ordered_events;
1427         struct perf_tool *tool = session->tool;
1428         int fd = perf_data_file__fd(session->file);
1429         union perf_event *event;
1430         uint32_t size, cur_size = 0;
1431         void *buf = NULL;
1432         s64 skip = 0;
1433         u64 head;
1434         ssize_t err;
1435         void *p;
1436
1437         perf_tool__fill_defaults(tool);
1438
1439         head = 0;
1440         cur_size = sizeof(union perf_event);
1441
1442         buf = malloc(cur_size);
1443         if (!buf)
1444                 return -errno;
1445 more:
1446         event = buf;
1447         err = readn(fd, event, sizeof(struct perf_event_header));
1448         if (err <= 0) {
1449                 if (err == 0)
1450                         goto done;
1451
1452                 pr_err("failed to read event header\n");
1453                 goto out_err;
1454         }
1455
1456         if (session->header.needs_swap)
1457                 perf_event_header__bswap(&event->header);
1458
1459         size = event->header.size;
1460         if (size < sizeof(struct perf_event_header)) {
1461                 pr_err("bad event header size\n");
1462                 goto out_err;
1463         }
1464
1465         if (size > cur_size) {
1466                 void *new = realloc(buf, size);
1467                 if (!new) {
1468                         pr_err("failed to allocate memory to read event\n");
1469                         goto out_err;
1470                 }
1471                 buf = new;
1472                 cur_size = size;
1473                 event = buf;
1474         }
1475         p = event;
1476         p += sizeof(struct perf_event_header);
1477
1478         if (size - sizeof(struct perf_event_header)) {
1479                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1480                 if (err <= 0) {
1481                         if (err == 0) {
1482                                 pr_err("unexpected end of event stream\n");
1483                                 goto done;
1484                         }
1485
1486                         pr_err("failed to read event data\n");
1487                         goto out_err;
1488                 }
1489         }
1490
1491         if ((skip = perf_session__process_event(session, event, head)) < 0) {
1492                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1493                        head, event->header.size, event->header.type);
1494                 err = -EINVAL;
1495                 goto out_err;
1496         }
1497
1498         head += size;
1499
1500         if (skip > 0)
1501                 head += skip;
1502
1503         if (!session_done())
1504                 goto more;
1505 done:
1506         /* do the final flush for ordered samples */
1507         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1508         if (err)
1509                 goto out_err;
1510         err = auxtrace__flush_events(session, tool);
1511         if (err)
1512                 goto out_err;
1513         err = perf_session__flush_thread_stacks(session);
1514 out_err:
1515         free(buf);
1516         perf_session__warn_about_errors(session);
1517         ordered_events__free(&session->ordered_events);
1518         auxtrace__free_events(session);
1519         return err;
1520 }
1521
1522 static union perf_event *
1523 fetch_mmaped_event(struct perf_session *session,
1524                    u64 head, size_t mmap_size, char *buf)
1525 {
1526         union perf_event *event;
1527
1528         /*
1529          * Ensure we have enough space remaining to read
1530          * the size of the event in the headers.
1531          */
1532         if (head + sizeof(event->header) > mmap_size)
1533                 return NULL;
1534
1535         event = (union perf_event *)(buf + head);
1536
1537         if (session->header.needs_swap)
1538                 perf_event_header__bswap(&event->header);
1539
1540         if (head + event->header.size > mmap_size) {
1541                 /* We're not fetching the event so swap back again */
1542                 if (session->header.needs_swap)
1543                         perf_event_header__bswap(&event->header);
1544                 return NULL;
1545         }
1546
1547         return event;
1548 }
1549
1550 /*
1551  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1552  * slices. On 32bit we use 32MB.
1553  */
1554 #if BITS_PER_LONG == 64
1555 #define MMAP_SIZE ULLONG_MAX
1556 #define NUM_MMAPS 1
1557 #else
1558 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1559 #define NUM_MMAPS 128
1560 #endif
1561
1562 static int __perf_session__process_events(struct perf_session *session,
1563                                           u64 data_offset, u64 data_size,
1564                                           u64 file_size)
1565 {
1566         struct ordered_events *oe = &session->ordered_events;
1567         struct perf_tool *tool = session->tool;
1568         int fd = perf_data_file__fd(session->file);
1569         u64 head, page_offset, file_offset, file_pos, size;
1570         int err, mmap_prot, mmap_flags, map_idx = 0;
1571         size_t  mmap_size;
1572         char *buf, *mmaps[NUM_MMAPS];
1573         union perf_event *event;
1574         struct ui_progress prog;
1575         s64 skip;
1576
1577         perf_tool__fill_defaults(tool);
1578
1579         page_offset = page_size * (data_offset / page_size);
1580         file_offset = page_offset;
1581         head = data_offset - page_offset;
1582
1583         if (data_size == 0)
1584                 goto out;
1585
1586         if (data_offset + data_size < file_size)
1587                 file_size = data_offset + data_size;
1588
1589         ui_progress__init(&prog, file_size, "Processing events...");
1590
1591         mmap_size = MMAP_SIZE;
1592         if (mmap_size > file_size) {
1593                 mmap_size = file_size;
1594                 session->one_mmap = true;
1595         }
1596
1597         memset(mmaps, 0, sizeof(mmaps));
1598
1599         mmap_prot  = PROT_READ;
1600         mmap_flags = MAP_SHARED;
1601
1602         if (session->header.needs_swap) {
1603                 mmap_prot  |= PROT_WRITE;
1604                 mmap_flags = MAP_PRIVATE;
1605         }
1606 remap:
1607         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1608                    file_offset);
1609         if (buf == MAP_FAILED) {
1610                 pr_err("failed to mmap file\n");
1611                 err = -errno;
1612                 goto out_err;
1613         }
1614         mmaps[map_idx] = buf;
1615         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1616         file_pos = file_offset + head;
1617         if (session->one_mmap) {
1618                 session->one_mmap_addr = buf;
1619                 session->one_mmap_offset = file_offset;
1620         }
1621
1622 more:
1623         event = fetch_mmaped_event(session, head, mmap_size, buf);
1624         if (!event) {
1625                 if (mmaps[map_idx]) {
1626                         munmap(mmaps[map_idx], mmap_size);
1627                         mmaps[map_idx] = NULL;
1628                 }
1629
1630                 page_offset = page_size * (head / page_size);
1631                 file_offset += page_offset;
1632                 head -= page_offset;
1633                 goto remap;
1634         }
1635
1636         size = event->header.size;
1637
1638         if (size < sizeof(struct perf_event_header) ||
1639             (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1640                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1641                        file_offset + head, event->header.size,
1642                        event->header.type);
1643                 err = -EINVAL;
1644                 goto out_err;
1645         }
1646
1647         if (skip)
1648                 size += skip;
1649
1650         head += size;
1651         file_pos += size;
1652
1653         ui_progress__update(&prog, size);
1654
1655         if (session_done())
1656                 goto out;
1657
1658         if (file_pos < file_size)
1659                 goto more;
1660
1661 out:
1662         /* do the final flush for ordered samples */
1663         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1664         if (err)
1665                 goto out_err;
1666         err = auxtrace__flush_events(session, tool);
1667         if (err)
1668                 goto out_err;
1669         err = perf_session__flush_thread_stacks(session);
1670 out_err:
1671         ui_progress__finish();
1672         perf_session__warn_about_errors(session);
1673         ordered_events__free(&session->ordered_events);
1674         auxtrace__free_events(session);
1675         session->one_mmap = false;
1676         return err;
1677 }
1678
1679 int perf_session__process_events(struct perf_session *session)
1680 {
1681         u64 size = perf_data_file__size(session->file);
1682         int err;
1683
1684         if (perf_session__register_idle_thread(session) == NULL)
1685                 return -ENOMEM;
1686
1687         if (!perf_data_file__is_pipe(session->file))
1688                 err = __perf_session__process_events(session,
1689                                                      session->header.data_offset,
1690                                                      session->header.data_size, size);
1691         else
1692                 err = __perf_session__process_pipe_events(session);
1693
1694         return err;
1695 }
1696
1697 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1698 {
1699         struct perf_evsel *evsel;
1700
1701         evlist__for_each(session->evlist, evsel) {
1702                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1703                         return true;
1704         }
1705
1706         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1707         return false;
1708 }
1709
1710 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1711                                      const char *symbol_name, u64 addr)
1712 {
1713         char *bracket;
1714         enum map_type i;
1715         struct ref_reloc_sym *ref;
1716
1717         ref = zalloc(sizeof(struct ref_reloc_sym));
1718         if (ref == NULL)
1719                 return -ENOMEM;
1720
1721         ref->name = strdup(symbol_name);
1722         if (ref->name == NULL) {
1723                 free(ref);
1724                 return -ENOMEM;
1725         }
1726
1727         bracket = strchr(ref->name, ']');
1728         if (bracket)
1729                 *bracket = '\0';
1730
1731         ref->addr = addr;
1732
1733         for (i = 0; i < MAP__NR_TYPES; ++i) {
1734                 struct kmap *kmap = map__kmap(maps[i]);
1735
1736                 if (!kmap)
1737                         continue;
1738                 kmap->ref_reloc_sym = ref;
1739         }
1740
1741         return 0;
1742 }
1743
1744 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1745 {
1746         return machines__fprintf_dsos(&session->machines, fp);
1747 }
1748
1749 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1750                                           bool (skip)(struct dso *dso, int parm), int parm)
1751 {
1752         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1753 }
1754
1755 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1756 {
1757         size_t ret;
1758         const char *msg = "";
1759
1760         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1761                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1762
1763         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1764
1765         ret += events_stats__fprintf(&session->evlist->stats, fp);
1766         return ret;
1767 }
1768
1769 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1770 {
1771         /*
1772          * FIXME: Here we have to actually print all the machines in this
1773          * session, not just the host...
1774          */
1775         return machine__fprintf(&session->machines.host, fp);
1776 }
1777
1778 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1779                                               unsigned int type)
1780 {
1781         struct perf_evsel *pos;
1782
1783         evlist__for_each(session->evlist, pos) {
1784                 if (pos->attr.type == type)
1785                         return pos;
1786         }
1787         return NULL;
1788 }
1789
1790 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1791                           struct addr_location *al,
1792                           unsigned int print_opts, unsigned int stack_depth)
1793 {
1794         struct callchain_cursor_node *node;
1795         int print_ip = print_opts & PRINT_IP_OPT_IP;
1796         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1797         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1798         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1799         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1800         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1801         char s = print_oneline ? ' ' : '\t';
1802
1803         if (symbol_conf.use_callchain && sample->callchain) {
1804                 struct addr_location node_al;
1805
1806                 if (thread__resolve_callchain(al->thread, evsel,
1807                                               sample, NULL, NULL,
1808                                               PERF_MAX_STACK_DEPTH) != 0) {
1809                         if (verbose)
1810                                 error("Failed to resolve callchain. Skipping\n");
1811                         return;
1812                 }
1813                 callchain_cursor_commit(&callchain_cursor);
1814
1815                 if (print_symoffset)
1816                         node_al = *al;
1817
1818                 while (stack_depth) {
1819                         u64 addr = 0;
1820
1821                         node = callchain_cursor_current(&callchain_cursor);
1822                         if (!node)
1823                                 break;
1824
1825                         if (node->sym && node->sym->ignore)
1826                                 goto next;
1827
1828                         if (print_ip)
1829                                 printf("%c%16" PRIx64, s, node->ip);
1830
1831                         if (node->map)
1832                                 addr = node->map->map_ip(node->map, node->ip);
1833
1834                         if (print_sym) {
1835                                 printf(" ");
1836                                 if (print_symoffset) {
1837                                         node_al.addr = addr;
1838                                         node_al.map  = node->map;
1839                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1840                                 } else
1841                                         symbol__fprintf_symname(node->sym, stdout);
1842                         }
1843
1844                         if (print_dso) {
1845                                 printf(" (");
1846                                 map__fprintf_dsoname(node->map, stdout);
1847                                 printf(")");
1848                         }
1849
1850                         if (print_srcline)
1851                                 map__fprintf_srcline(node->map, addr, "\n  ",
1852                                                      stdout);
1853
1854                         if (!print_oneline)
1855                                 printf("\n");
1856
1857                         stack_depth--;
1858 next:
1859                         callchain_cursor_advance(&callchain_cursor);
1860                 }
1861
1862         } else {
1863                 if (al->sym && al->sym->ignore)
1864                         return;
1865
1866                 if (print_ip)
1867                         printf("%16" PRIx64, sample->ip);
1868
1869                 if (print_sym) {
1870                         printf(" ");
1871                         if (print_symoffset)
1872                                 symbol__fprintf_symname_offs(al->sym, al,
1873                                                              stdout);
1874                         else
1875                                 symbol__fprintf_symname(al->sym, stdout);
1876                 }
1877
1878                 if (print_dso) {
1879                         printf(" (");
1880                         map__fprintf_dsoname(al->map, stdout);
1881                         printf(")");
1882                 }
1883
1884                 if (print_srcline)
1885                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
1886         }
1887 }
1888
1889 int perf_session__cpu_bitmap(struct perf_session *session,
1890                              const char *cpu_list, unsigned long *cpu_bitmap)
1891 {
1892         int i, err = -1;
1893         struct cpu_map *map;
1894
1895         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1896                 struct perf_evsel *evsel;
1897
1898                 evsel = perf_session__find_first_evtype(session, i);
1899                 if (!evsel)
1900                         continue;
1901
1902                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1903                         pr_err("File does not contain CPU events. "
1904                                "Remove -c option to proceed.\n");
1905                         return -1;
1906                 }
1907         }
1908
1909         map = cpu_map__new(cpu_list);
1910         if (map == NULL) {
1911                 pr_err("Invalid cpu_list\n");
1912                 return -1;
1913         }
1914
1915         for (i = 0; i < map->nr; i++) {
1916                 int cpu = map->map[i];
1917
1918                 if (cpu >= MAX_NR_CPUS) {
1919                         pr_err("Requested CPU %d too large. "
1920                                "Consider raising MAX_NR_CPUS\n", cpu);
1921                         goto out_delete_map;
1922                 }
1923
1924                 set_bit(cpu, cpu_bitmap);
1925         }
1926
1927         err = 0;
1928
1929 out_delete_map:
1930         cpu_map__put(map);
1931         return err;
1932 }
1933
1934 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1935                                 bool full)
1936 {
1937         struct stat st;
1938         int fd, ret;
1939
1940         if (session == NULL || fp == NULL)
1941                 return;
1942
1943         fd = perf_data_file__fd(session->file);
1944
1945         ret = fstat(fd, &st);
1946         if (ret == -1)
1947                 return;
1948
1949         fprintf(fp, "# ========\n");
1950         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1951         perf_header__fprintf_info(session, fp, full);
1952         fprintf(fp, "# ========\n#\n");
1953 }
1954
1955
1956 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1957                                              const struct perf_evsel_str_handler *assocs,
1958                                              size_t nr_assocs)
1959 {
1960         struct perf_evsel *evsel;
1961         size_t i;
1962         int err;
1963
1964         for (i = 0; i < nr_assocs; i++) {
1965                 /*
1966                  * Adding a handler for an event not in the session,
1967                  * just ignore it.
1968                  */
1969                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1970                 if (evsel == NULL)
1971                         continue;
1972
1973                 err = -EEXIST;
1974                 if (evsel->handler != NULL)
1975                         goto out;
1976                 evsel->handler = assocs[i].handler;
1977         }
1978
1979         err = 0;
1980 out:
1981         return err;
1982 }
1983
1984 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
1985                                  union perf_event *event,
1986                                  struct perf_session *session)
1987 {
1988         struct perf_evlist *evlist = session->evlist;
1989         struct id_index_event *ie = &event->id_index;
1990         size_t i, nr, max_nr;
1991
1992         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
1993                  sizeof(struct id_index_entry);
1994         nr = ie->nr;
1995         if (nr > max_nr)
1996                 return -EINVAL;
1997
1998         if (dump_trace)
1999                 fprintf(stdout, " nr: %zu\n", nr);
2000
2001         for (i = 0; i < nr; i++) {
2002                 struct id_index_entry *e = &ie->entries[i];
2003                 struct perf_sample_id *sid;
2004
2005                 if (dump_trace) {
2006                         fprintf(stdout, " ... id: %"PRIu64, e->id);
2007                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
2008                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
2009                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
2010                 }
2011
2012                 sid = perf_evlist__id2sid(evlist, e->id);
2013                 if (!sid)
2014                         return -ENOENT;
2015                 sid->idx = e->idx;
2016                 sid->cpu = e->cpu;
2017                 sid->tid = e->tid;
2018         }
2019         return 0;
2020 }
2021
2022 int perf_event__synthesize_id_index(struct perf_tool *tool,
2023                                     perf_event__handler_t process,
2024                                     struct perf_evlist *evlist,
2025                                     struct machine *machine)
2026 {
2027         union perf_event *ev;
2028         struct perf_evsel *evsel;
2029         size_t nr = 0, i = 0, sz, max_nr, n;
2030         int err;
2031
2032         pr_debug2("Synthesizing id index\n");
2033
2034         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2035                  sizeof(struct id_index_entry);
2036
2037         evlist__for_each(evlist, evsel)
2038                 nr += evsel->ids;
2039
2040         n = nr > max_nr ? max_nr : nr;
2041         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2042         ev = zalloc(sz);
2043         if (!ev)
2044                 return -ENOMEM;
2045
2046         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2047         ev->id_index.header.size = sz;
2048         ev->id_index.nr = n;
2049
2050         evlist__for_each(evlist, evsel) {
2051                 u32 j;
2052
2053                 for (j = 0; j < evsel->ids; j++) {
2054                         struct id_index_entry *e;
2055                         struct perf_sample_id *sid;
2056
2057                         if (i >= n) {
2058                                 err = process(tool, ev, NULL, machine);
2059                                 if (err)
2060                                         goto out_err;
2061                                 nr -= n;
2062                                 i = 0;
2063                         }
2064
2065                         e = &ev->id_index.entries[i++];
2066
2067                         e->id = evsel->id[j];
2068
2069                         sid = perf_evlist__id2sid(evlist, e->id);
2070                         if (!sid) {
2071                                 free(ev);
2072                                 return -ENOENT;
2073                         }
2074
2075                         e->idx = sid->idx;
2076                         e->cpu = sid->cpu;
2077                         e->tid = sid->tid;
2078                 }
2079         }
2080
2081         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2082         ev->id_index.header.size = sz;
2083         ev->id_index.nr = nr;
2084
2085         err = process(tool, ev, NULL, machine);
2086 out_err:
2087         free(ev);
2088
2089         return err;
2090 }