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)\n");
  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\n");
  41                 return -1;
  42         }
  43
  44         if (!perf_evlist__valid_sample_id_all(session->evlist)) {
  45                 pr_err("non matching sample_id_all\n");
  46                 return -1;
  47         }
  48
  49         if (!perf_evlist__valid_read_format(session->evlist)) {
  50                 pr_err("non matching read_format\n");
  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                         /*
 139                          * set session attributes that are present in perf.data
 140                          * but not in pipe-mode.
 141                          */
 142                         if (!file->is_pipe) {
 143                                 perf_session__set_id_hdr_size(session);
 144                                 perf_session__set_comm_exec(session);
 145                         }
 146                 }
 147         } else  {
 148                 session->machines.host.env = &perf_env;
 149         }
 150
 151         if (!file || perf_data_file__is_write(file)) {
 152                 /*
 153                  * In O_RDONLY mode this will be performed when reading the
 154                  * kernel MMAP event, in perf_event__process_mmap().
 155                  */
 156                 if (perf_session__create_kernel_maps(session) < 0)
 157                         pr_warning("Cannot read kernel map\n");
 158         }
 159
 160         /*
 161          * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
 162          * processed, so perf_evlist__sample_id_all is not meaningful here.
 163          */
 164         if ((!file || !file->is_pipe) && tool && tool->ordering_requires_timestamps &&
 165             tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
 166                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 167                 tool->ordered_events = false;
 168         }
 169
 170         return session;
 171
 172  out_close:
 173         perf_data_file__close(file);
 174  out_delete:
 175         perf_session__delete(session);
 176  out:
 177         return NULL;
 178 }
 179
 180 static void perf_session__delete_threads(struct perf_session *session)
 181 {
 182         machine__delete_threads(&session->machines.host);
 183 }
 184
 185 void perf_session__delete(struct perf_session *session)
 186 {
 187         auxtrace__free(session);
 188         auxtrace_index__free(&session->auxtrace_index);
 189         perf_session__destroy_kernel_maps(session);
 190         perf_session__delete_threads(session);
 191         perf_env__exit(&session->header.env);
 192         machines__exit(&session->machines);
 193         if (session->file)
 194                 perf_data_file__close(session->file);
 195         free(session);
 196 }
 197
 198 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 199                                                  __maybe_unused,
 200                                                  union perf_event *event
 201                                                  __maybe_unused,
 202                                                  struct perf_session *session
 203                                                 __maybe_unused)
 204 {
 205         dump_printf(": unhandled!\n");
 206         return 0;
 207 }
 208
 209 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 210                                          union perf_event *event __maybe_unused,
 211                                          struct perf_evlist **pevlist
 212                                          __maybe_unused)
 213 {
 214         dump_printf(": unhandled!\n");
 215         return 0;
 216 }
 217
 218 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 219                                      union perf_event *event __maybe_unused,
 220                                      struct perf_sample *sample __maybe_unused,
 221                                      struct perf_evsel *evsel __maybe_unused,
 222                                      struct machine *machine __maybe_unused)
 223 {
 224         dump_printf(": unhandled!\n");
 225         return 0;
 226 }
 227
 228 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 229                               union perf_event *event __maybe_unused,
 230                               struct perf_sample *sample __maybe_unused,
 231                               struct machine *machine __maybe_unused)
 232 {
 233         dump_printf(": unhandled!\n");
 234         return 0;
 235 }
 236
 237 static int process_build_id_stub(struct perf_tool *tool __maybe_unused,
 238                                  union perf_event *event __maybe_unused,
 239                                  struct perf_session *session __maybe_unused)
 240 {
 241         dump_printf(": unhandled!\n");
 242         return 0;
 243 }
 244
 245 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 246                                        union perf_event *event __maybe_unused,
 247                                        struct ordered_events *oe __maybe_unused)
 248 {
 249         dump_printf(": unhandled!\n");
 250         return 0;
 251 }
 252
 253 static int process_finished_round(struct perf_tool *tool,
 254                                   union perf_event *event,
 255                                   struct ordered_events *oe);
 256
 257 static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
 258                                  union perf_event *event __maybe_unused,
 259                                  struct perf_session *perf_session
 260                                  __maybe_unused)
 261 {
 262         dump_printf(": unhandled!\n");
 263         return 0;
 264 }
 265
 266 static int process_event_auxtrace_info_stub(struct perf_tool *tool __maybe_unused,
 267                                 union perf_event *event __maybe_unused,
 268                                 struct perf_session *session __maybe_unused)
 269 {
 270         dump_printf(": unhandled!\n");
 271         return 0;
 272 }
 273
 274 static int skipn(int fd, off_t n)
 275 {
 276         char buf[4096];
 277         ssize_t ret;
 278
 279         while (n > 0) {
 280                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 281                 if (ret <= 0)
 282                         return ret;
 283                 n -= ret;
 284         }
 285
 286         return 0;
 287 }
 288
 289 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
 290                                        union perf_event *event,
 291                                        struct perf_session *session
 292                                        __maybe_unused)
 293 {
 294         dump_printf(": unhandled!\n");
 295         if (perf_data_file__is_pipe(session->file))
 296                 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
 297         return event->auxtrace.size;
 298 }
 299
 300 static
 301 int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
 302                                       union perf_event *event __maybe_unused,
 303                                       struct perf_session *session __maybe_unused)
 304 {
 305         dump_printf(": unhandled!\n");
 306         return 0;
 307 }
 308
 309 void perf_tool__fill_defaults(struct perf_tool *tool)
 310 {
 311         if (tool->sample == NULL)
 312                 tool->sample = process_event_sample_stub;
 313         if (tool->mmap == NULL)
 314                 tool->mmap = process_event_stub;
 315         if (tool->mmap2 == NULL)
 316                 tool->mmap2 = process_event_stub;
 317         if (tool->comm == NULL)
 318                 tool->comm = process_event_stub;
 319         if (tool->fork == NULL)
 320                 tool->fork = process_event_stub;
 321         if (tool->exit == NULL)
 322                 tool->exit = process_event_stub;
 323         if (tool->lost == NULL)
 324                 tool->lost = perf_event__process_lost;
 325         if (tool->lost_samples == NULL)
 326                 tool->lost_samples = perf_event__process_lost_samples;
 327         if (tool->aux == NULL)
 328                 tool->aux = perf_event__process_aux;
 329         if (tool->itrace_start == NULL)
 330                 tool->itrace_start = perf_event__process_itrace_start;
 331         if (tool->context_switch == NULL)
 332                 tool->context_switch = perf_event__process_switch;
 333         if (tool->read == NULL)
 334                 tool->read = process_event_sample_stub;
 335         if (tool->throttle == NULL)
 336                 tool->throttle = process_event_stub;
 337         if (tool->unthrottle == NULL)
 338                 tool->unthrottle = process_event_stub;
 339         if (tool->attr == NULL)
 340                 tool->attr = process_event_synth_attr_stub;
 341         if (tool->tracing_data == NULL)
 342                 tool->tracing_data = process_event_synth_tracing_data_stub;
 343         if (tool->build_id == NULL)
 344                 tool->build_id = process_build_id_stub;
 345         if (tool->finished_round == NULL) {
 346                 if (tool->ordered_events)
 347                         tool->finished_round = process_finished_round;
 348                 else
 349                         tool->finished_round = process_finished_round_stub;
 350         }
 351         if (tool->id_index == NULL)
 352                 tool->id_index = process_id_index_stub;
 353         if (tool->auxtrace_info == NULL)
 354                 tool->auxtrace_info = process_event_auxtrace_info_stub;
 355         if (tool->auxtrace == NULL)
 356                 tool->auxtrace = process_event_auxtrace_stub;
 357         if (tool->auxtrace_error == NULL)
 358                 tool->auxtrace_error = process_event_auxtrace_error_stub;
 359 }
 360
 361 static void swap_sample_id_all(union perf_event *event, void *data)
 362 {
 363         void *end = (void *) event + event->header.size;
 364         int size = end - data;
 365
 366         BUG_ON(size % sizeof(u64));
 367         mem_bswap_64(data, size);
 368 }
 369
 370 static void perf_event__all64_swap(union perf_event *event,
 371                                    bool sample_id_all __maybe_unused)
 372 {
 373         struct perf_event_header *hdr = &event->header;
 374         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 375 }
 376
 377 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 378 {
 379         event->comm.pid = bswap_32(event->comm.pid);
 380         event->comm.tid = bswap_32(event->comm.tid);
 381
 382         if (sample_id_all) {
 383                 void *data = &event->comm.comm;
 384
 385                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 386                 swap_sample_id_all(event, data);
 387         }
 388 }
 389
 390 static void perf_event__mmap_swap(union perf_event *event,
 391                                   bool sample_id_all)
 392 {
 393         event->mmap.pid   = bswap_32(event->mmap.pid);
 394         event->mmap.tid   = bswap_32(event->mmap.tid);
 395         event->mmap.start = bswap_64(event->mmap.start);
 396         event->mmap.len   = bswap_64(event->mmap.len);
 397         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 398
 399         if (sample_id_all) {
 400                 void *data = &event->mmap.filename;
 401
 402                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 403                 swap_sample_id_all(event, data);
 404         }
 405 }
 406
 407 static void perf_event__mmap2_swap(union perf_event *event,
 408                                   bool sample_id_all)
 409 {
 410         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 411         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 412         event->mmap2.start = bswap_64(event->mmap2.start);
 413         event->mmap2.len   = bswap_64(event->mmap2.len);
 414         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 415         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 416         event->mmap2.min   = bswap_32(event->mmap2.min);
 417         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 418         event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
 419
 420         if (sample_id_all) {
 421                 void *data = &event->mmap2.filename;
 422
 423                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 424                 swap_sample_id_all(event, data);
 425         }
 426 }
 427 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 428 {
 429         event->fork.pid  = bswap_32(event->fork.pid);
 430         event->fork.tid  = bswap_32(event->fork.tid);
 431         event->fork.ppid = bswap_32(event->fork.ppid);
 432         event->fork.ptid = bswap_32(event->fork.ptid);
 433         event->fork.time = bswap_64(event->fork.time);
 434
 435         if (sample_id_all)
 436                 swap_sample_id_all(event, &event->fork + 1);
 437 }
 438
 439 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 440 {
 441         event->read.pid          = bswap_32(event->read.pid);
 442         event->read.tid          = bswap_32(event->read.tid);
 443         event->read.value        = bswap_64(event->read.value);
 444         event->read.time_enabled = bswap_64(event->read.time_enabled);
 445         event->read.time_running = bswap_64(event->read.time_running);
 446         event->read.id           = bswap_64(event->read.id);
 447
 448         if (sample_id_all)
 449                 swap_sample_id_all(event, &event->read + 1);
 450 }
 451
 452 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 453 {
 454         event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 455         event->aux.aux_size   = bswap_64(event->aux.aux_size);
 456         event->aux.flags      = bswap_64(event->aux.flags);
 457
 458         if (sample_id_all)
 459                 swap_sample_id_all(event, &event->aux + 1);
 460 }
 461
 462 static void perf_event__itrace_start_swap(union perf_event *event,
 463                                           bool sample_id_all)
 464 {
 465         event->itrace_start.pid  = bswap_32(event->itrace_start.pid);
 466         event->itrace_start.tid  = bswap_32(event->itrace_start.tid);
 467
 468         if (sample_id_all)
 469                 swap_sample_id_all(event, &event->itrace_start + 1);
 470 }
 471
 472 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 473 {
 474         if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 475                 event->context_switch.next_prev_pid =
 476                                 bswap_32(event->context_switch.next_prev_pid);
 477                 event->context_switch.next_prev_tid =
 478                                 bswap_32(event->context_switch.next_prev_tid);
 479         }
 480
 481         if (sample_id_all)
 482                 swap_sample_id_all(event, &event->context_switch + 1);
 483 }
 484
 485 static void perf_event__throttle_swap(union perf_event *event,
 486                                       bool sample_id_all)
 487 {
 488         event->throttle.time      = bswap_64(event->throttle.time);
 489         event->throttle.id        = bswap_64(event->throttle.id);
 490         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 491
 492         if (sample_id_all)
 493                 swap_sample_id_all(event, &event->throttle + 1);
 494 }
 495
 496 static u8 revbyte(u8 b)
 497 {
 498         int rev = (b >> 4) | ((b & 0xf) << 4);
 499         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 500         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 501         return (u8) rev;
 502 }
 503
 504 /*
 505  * XXX this is hack in attempt to carry flags bitfield
 506  * throught endian village. ABI says:
 507  *
 508  * Bit-fields are allocated from right to left (least to most significant)
 509  * on little-endian implementations and from left to right (most to least
 510  * significant) on big-endian implementations.
 511  *
 512  * The above seems to be byte specific, so we need to reverse each
 513  * byte of the bitfield. 'Internet' also says this might be implementation
 514  * specific and we probably need proper fix and carry perf_event_attr
 515  * bitfield flags in separate data file FEAT_ section. Thought this seems
 516  * to work for now.
 517  */
 518 static void swap_bitfield(u8 *p, unsigned len)
 519 {
 520         unsigned i;
 521
 522         for (i = 0; i < len; i++) {
 523                 *p = revbyte(*p);
 524                 p++;
 525         }
 526 }
 527
 528 /* exported for swapping attributes in file header */
 529 void perf_event__attr_swap(struct perf_event_attr *attr)
 530 {
 531         attr->type              = bswap_32(attr->type);
 532         attr->size              = bswap_32(attr->size);
 533
 534 #define bswap_safe(f, n)                                        \
 535         (attr->size > (offsetof(struct perf_event_attr, f) +    \
 536                        sizeof(attr->f) * (n)))
 537 #define bswap_field(f, sz)                      \
 538 do {                                            \
 539         if (bswap_safe(f, 0))                   \
 540                 attr->f = bswap_##sz(attr->f);  \
 541 } while(0)
 542 #define bswap_field_32(f) bswap_field(f, 32)
 543 #define bswap_field_64(f) bswap_field(f, 64)
 544
 545         bswap_field_64(config);
 546         bswap_field_64(sample_period);
 547         bswap_field_64(sample_type);
 548         bswap_field_64(read_format);
 549         bswap_field_32(wakeup_events);
 550         bswap_field_32(bp_type);
 551         bswap_field_64(bp_addr);
 552         bswap_field_64(bp_len);
 553         bswap_field_64(branch_sample_type);
 554         bswap_field_64(sample_regs_user);
 555         bswap_field_32(sample_stack_user);
 556         bswap_field_32(aux_watermark);
 557
 558         /*
 559          * After read_format are bitfields. Check read_format because
 560          * we are unable to use offsetof on bitfield.
 561          */
 562         if (bswap_safe(read_format, 1))
 563                 swap_bitfield((u8 *) (&attr->read_format + 1),
 564                               sizeof(u64));
 565 #undef bswap_field_64
 566 #undef bswap_field_32
 567 #undef bswap_field
 568 #undef bswap_safe
 569 }
 570
 571 static void perf_event__hdr_attr_swap(union perf_event *event,
 572                                       bool sample_id_all __maybe_unused)
 573 {
 574         size_t size;
 575
 576         perf_event__attr_swap(&event->attr.attr);
 577
 578         size = event->header.size;
 579         size -= (void *)&event->attr.id - (void *)event;
 580         mem_bswap_64(event->attr.id, size);
 581 }
 582
 583 static void perf_event__event_type_swap(union perf_event *event,
 584                                         bool sample_id_all __maybe_unused)
 585 {
 586         event->event_type.event_type.event_id =
 587                 bswap_64(event->event_type.event_type.event_id);
 588 }
 589
 590 static void perf_event__tracing_data_swap(union perf_event *event,
 591                                           bool sample_id_all __maybe_unused)
 592 {
 593         event->tracing_data.size = bswap_32(event->tracing_data.size);
 594 }
 595
 596 static void perf_event__auxtrace_info_swap(union perf_event *event,
 597                                            bool sample_id_all __maybe_unused)
 598 {
 599         size_t size;
 600
 601         event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 602
 603         size = event->header.size;
 604         size -= (void *)&event->auxtrace_info.priv - (void *)event;
 605         mem_bswap_64(event->auxtrace_info.priv, size);
 606 }
 607
 608 static void perf_event__auxtrace_swap(union perf_event *event,
 609                                       bool sample_id_all __maybe_unused)
 610 {
 611         event->auxtrace.size      = bswap_64(event->auxtrace.size);
 612         event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 613         event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 614         event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 615         event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 616         event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 617 }
 618
 619 static void perf_event__auxtrace_error_swap(union perf_event *event,
 620                                             bool sample_id_all __maybe_unused)
 621 {
 622         event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 623         event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 624         event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 625         event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 626         event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 627         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 628 }
 629
 630 typedef void (*perf_event__swap_op)(union perf_event *event,
 631                                     bool sample_id_all);
 632
 633 static perf_event__swap_op perf_event__swap_ops[] = {
 634         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 635         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 636         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 637         [PERF_RECORD_FORK]                = perf_event__task_swap,
 638         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 639         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 640         [PERF_RECORD_READ]                = perf_event__read_swap,
 641         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 642         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 643         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 644         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
 645         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
 646         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
 647         [PERF_RECORD_SWITCH]              = perf_event__switch_swap,
 648         [PERF_RECORD_SWITCH_CPU_WIDE]     = perf_event__switch_swap,
 649         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 650         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 651         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 652         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 653         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
 654         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
 655         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
 656         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
 657         [PERF_RECORD_HEADER_MAX]          = NULL,
 658 };
 659
 660 /*
 661  * When perf record finishes a pass on every buffers, it records this pseudo
 662  * event.
 663  * We record the max timestamp t found in the pass n.
 664  * Assuming these timestamps are monotonic across cpus, we know that if
 665  * a buffer still has events with timestamps below t, they will be all
 666  * available and then read in the pass n + 1.
 667  * Hence when we start to read the pass n + 2, we can safely flush every
 668  * events with timestamps below t.
 669  *
 670  *    ============ PASS n =================
 671  *       CPU 0         |   CPU 1
 672  *                     |
 673  *    cnt1 timestamps  |   cnt2 timestamps
 674  *          1          |         2
 675  *          2          |         3
 676  *          -          |         4  <--- max recorded
 677  *
 678  *    ============ PASS n + 1 ==============
 679  *       CPU 0         |   CPU 1
 680  *                     |
 681  *    cnt1 timestamps  |   cnt2 timestamps
 682  *          3          |         5
 683  *          4          |         6
 684  *          5          |         7 <---- max recorded
 685  *
 686  *      Flush every events below timestamp 4
 687  *
 688  *    ============ PASS n + 2 ==============
 689  *       CPU 0         |   CPU 1
 690  *                     |
 691  *    cnt1 timestamps  |   cnt2 timestamps
 692  *          6          |         8
 693  *          7          |         9
 694  *          -          |         10
 695  *
 696  *      Flush every events below timestamp 7
 697  *      etc...
 698  */
 699 static int process_finished_round(struct perf_tool *tool __maybe_unused,
 700                                   union perf_event *event __maybe_unused,
 701                                   struct ordered_events *oe)
 702 {
 703         if (dump_trace)
 704                 fprintf(stdout, "\n");
 705         return ordered_events__flush(oe, OE_FLUSH__ROUND);
 706 }
 707
 708 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
 709                               struct perf_sample *sample, u64 file_offset)
 710 {
 711         return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
 712 }
 713
 714 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 715 {
 716         struct ip_callchain *callchain = sample->callchain;
 717         struct branch_stack *lbr_stack = sample->branch_stack;
 718         u64 kernel_callchain_nr = callchain->nr;
 719         unsigned int i;
 720
 721         for (i = 0; i < kernel_callchain_nr; i++) {
 722                 if (callchain->ips[i] == PERF_CONTEXT_USER)
 723                         break;
 724         }
 725
 726         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 727                 u64 total_nr;
 728                 /*
 729                  * LBR callstack can only get user call chain,
 730                  * i is kernel call chain number,
 731                  * 1 is PERF_CONTEXT_USER.
 732                  *
 733                  * The user call chain is stored in LBR registers.
 734                  * LBR are pair registers. The caller is stored
 735                  * in "from" register, while the callee is stored
 736                  * in "to" register.
 737                  * For example, there is a call stack
 738                  * "A"->"B"->"C"->"D".
 739                  * The LBR registers will recorde like
 740                  * "C"->"D", "B"->"C", "A"->"B".
 741                  * So only the first "to" register and all "from"
 742                  * registers are needed to construct the whole stack.
 743                  */
 744                 total_nr = i + 1 + lbr_stack->nr + 1;
 745                 kernel_callchain_nr = i + 1;
 746
 747                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 748
 749                 for (i = 0; i < kernel_callchain_nr; i++)
 750                         printf("..... %2d: %016" PRIx64 "\n",
 751                                i, callchain->ips[i]);
 752
 753                 printf("..... %2d: %016" PRIx64 "\n",
 754                        (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 755                 for (i = 0; i < lbr_stack->nr; i++)
 756                         printf("..... %2d: %016" PRIx64 "\n",
 757                                (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 758         }
 759 }
 760
 761 static void callchain__printf(struct perf_evsel *evsel,
 762                               struct perf_sample *sample)
 763 {
 764         unsigned int i;
 765         struct ip_callchain *callchain = sample->callchain;
 766
 767         if (has_branch_callstack(evsel))
 768                 callchain__lbr_callstack_printf(sample);
 769
 770         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 771
 772         for (i = 0; i < callchain->nr; i++)
 773                 printf("..... %2d: %016" PRIx64 "\n",
 774                        i, callchain->ips[i]);
 775 }
 776
 777 static void branch_stack__printf(struct perf_sample *sample)
 778 {
 779         uint64_t i;
 780
 781         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 782
 783         for (i = 0; i < sample->branch_stack->nr; i++) {
 784                 struct branch_entry *e = &sample->branch_stack->entries[i];
 785
 786                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
 787                         i, e->from, e->to,
 788                         e->flags.cycles,
 789                         e->flags.mispred ? "M" : " ",
 790                         e->flags.predicted ? "P" : " ",
 791                         e->flags.abort ? "A" : " ",
 792                         e->flags.in_tx ? "T" : " ",
 793                         (unsigned)e->flags.reserved);
 794         }
 795 }
 796
 797 static void regs_dump__printf(u64 mask, u64 *regs)
 798 {
 799         unsigned rid, i = 0;
 800
 801         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 802                 u64 val = regs[i++];
 803
 804                 printf(".... %-5s 0x%" PRIx64 "\n",
 805                        perf_reg_name(rid), val);
 806         }
 807 }
 808
 809 static const char *regs_abi[] = {
 810         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
 811         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 812         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 813 };
 814
 815 static inline const char *regs_dump_abi(struct regs_dump *d)
 816 {
 817         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 818                 return "unknown";
 819
 820         return regs_abi[d->abi];
 821 }
 822
 823 static void regs__printf(const char *type, struct regs_dump *regs)
 824 {
 825         u64 mask = regs->mask;
 826
 827         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 828                type,
 829                mask,
 830                regs_dump_abi(regs));
 831
 832         regs_dump__printf(mask, regs->regs);
 833 }
 834
 835 static void regs_user__printf(struct perf_sample *sample)
 836 {
 837         struct regs_dump *user_regs = &sample->user_regs;
 838
 839         if (user_regs->regs)
 840                 regs__printf("user", user_regs);
 841 }
 842
 843 static void regs_intr__printf(struct perf_sample *sample)
 844 {
 845         struct regs_dump *intr_regs = &sample->intr_regs;
 846
 847         if (intr_regs->regs)
 848                 regs__printf("intr", intr_regs);
 849 }
 850
 851 static void stack_user__printf(struct stack_dump *dump)
 852 {
 853         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 854                dump->size, dump->offset);
 855 }
 856
 857 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
 858                                        union perf_event *event,
 859                                        struct perf_sample *sample)
 860 {
 861         u64 sample_type = __perf_evlist__combined_sample_type(evlist);
 862
 863         if (event->header.type != PERF_RECORD_SAMPLE &&
 864             !perf_evlist__sample_id_all(evlist)) {
 865                 fputs("-1 -1 ", stdout);
 866                 return;
 867         }
 868
 869         if ((sample_type & PERF_SAMPLE_CPU))
 870                 printf("%u ", sample->cpu);
 871
 872         if (sample_type & PERF_SAMPLE_TIME)
 873                 printf("%" PRIu64 " ", sample->time);
 874 }
 875
 876 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
 877 {
 878         printf("... sample_read:\n");
 879
 880         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
 881                 printf("...... time enabled %016" PRIx64 "\n",
 882                        sample->read.time_enabled);
 883
 884         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
 885                 printf("...... time running %016" PRIx64 "\n",
 886                        sample->read.time_running);
 887
 888         if (read_format & PERF_FORMAT_GROUP) {
 889                 u64 i;
 890
 891                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
 892
 893                 for (i = 0; i < sample->read.group.nr; i++) {
 894                         struct sample_read_value *value;
 895
 896                         value = &sample->read.group.values[i];
 897                         printf("..... id %016" PRIx64
 898                                ", value %016" PRIx64 "\n",
 899                                value->id, value->value);
 900                 }
 901         } else
 902                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
 903                         sample->read.one.id, sample->read.one.value);
 904 }
 905
 906 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
 907                        u64 file_offset, struct perf_sample *sample)
 908 {
 909         if (!dump_trace)
 910                 return;
 911
 912         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 913                file_offset, event->header.size, event->header.type);
 914
 915         trace_event(event);
 916
 917         if (sample)
 918                 perf_evlist__print_tstamp(evlist, event, sample);
 919
 920         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 921                event->header.size, perf_event__name(event->header.type));
 922 }
 923
 924 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 925                         struct perf_sample *sample)
 926 {
 927         u64 sample_type;
 928
 929         if (!dump_trace)
 930                 return;
 931
 932         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 933                event->header.misc, sample->pid, sample->tid, sample->ip,
 934                sample->period, sample->addr);
 935
 936         sample_type = evsel->attr.sample_type;
 937
 938         if (sample_type & PERF_SAMPLE_CALLCHAIN)
 939                 callchain__printf(evsel, sample);
 940
 941         if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
 942                 branch_stack__printf(sample);
 943
 944         if (sample_type & PERF_SAMPLE_REGS_USER)
 945                 regs_user__printf(sample);
 946
 947         if (sample_type & PERF_SAMPLE_REGS_INTR)
 948                 regs_intr__printf(sample);
 949
 950         if (sample_type & PERF_SAMPLE_STACK_USER)
 951                 stack_user__printf(&sample->user_stack);
 952
 953         if (sample_type & PERF_SAMPLE_WEIGHT)
 954                 printf("... weight: %" PRIu64 "\n", sample->weight);
 955
 956         if (sample_type & PERF_SAMPLE_DATA_SRC)
 957                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
 958
 959         if (sample_type & PERF_SAMPLE_TRANSACTION)
 960                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
 961
 962         if (sample_type & PERF_SAMPLE_READ)
 963                 sample_read__printf(sample, evsel->attr.read_format);
 964 }
 965
 966 static struct machine *machines__find_for_cpumode(struct machines *machines,
 967                                                union perf_event *event,
 968                                                struct perf_sample *sample)
 969 {
 970         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 971         struct machine *machine;
 972
 973         if (perf_guest &&
 974             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
 975              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
 976                 u32 pid;
 977
 978                 if (event->header.type == PERF_RECORD_MMAP
 979                     || event->header.type == PERF_RECORD_MMAP2)
 980                         pid = event->mmap.pid;
 981                 else
 982                         pid = sample->pid;
 983
 984                 machine = machines__find(machines, pid);
 985                 if (!machine)
 986                         machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
 987                 return machine;
 988         }
 989
 990         return &machines->host;
 991 }
 992
 993 static int deliver_sample_value(struct perf_evlist *evlist,
 994                                 struct perf_tool *tool,
 995                                 union perf_event *event,
 996                                 struct perf_sample *sample,
 997                                 struct sample_read_value *v,
 998                                 struct machine *machine)
 999 {
1000         struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1001
1002         if (sid) {
1003                 sample->id     = v->id;
1004                 sample->period = v->value - sid->period;
1005                 sid->period    = v->value;
1006         }
1007
1008         if (!sid || sid->evsel == NULL) {
1009                 ++evlist->stats.nr_unknown_id;
1010                 return 0;
1011         }
1012
1013         return tool->sample(tool, event, sample, sid->evsel, machine);
1014 }
1015
1016 static int deliver_sample_group(struct perf_evlist *evlist,
1017                                 struct perf_tool *tool,
1018                                 union  perf_event *event,
1019                                 struct perf_sample *sample,
1020                                 struct machine *machine)
1021 {
1022         int ret = -EINVAL;
1023         u64 i;
1024
1025         for (i = 0; i < sample->read.group.nr; i++) {
1026                 ret = deliver_sample_value(evlist, tool, event, sample,
1027                                            &sample->read.group.values[i],
1028                                            machine);
1029                 if (ret)
1030                         break;
1031         }
1032
1033         return ret;
1034 }
1035
1036 static int
1037  perf_evlist__deliver_sample(struct perf_evlist *evlist,
1038                              struct perf_tool *tool,
1039                              union  perf_event *event,
1040                              struct perf_sample *sample,
1041                              struct perf_evsel *evsel,
1042                              struct machine *machine)
1043 {
1044         /* We know evsel != NULL. */
1045         u64 sample_type = evsel->attr.sample_type;
1046         u64 read_format = evsel->attr.read_format;
1047
1048         /* Standard sample delievery. */
1049         if (!(sample_type & PERF_SAMPLE_READ))
1050                 return tool->sample(tool, event, sample, evsel, machine);
1051
1052         /* For PERF_SAMPLE_READ we have either single or group mode. */
1053         if (read_format & PERF_FORMAT_GROUP)
1054                 return deliver_sample_group(evlist, tool, event, sample,
1055                                             machine);
1056         else
1057                 return deliver_sample_value(evlist, tool, event, sample,
1058                                             &sample->read.one, machine);
1059 }
1060
1061 static int machines__deliver_event(struct machines *machines,
1062                                    struct perf_evlist *evlist,
1063                                    union perf_event *event,
1064                                    struct perf_sample *sample,
1065                                    struct perf_tool *tool, u64 file_offset)
1066 {
1067         struct perf_evsel *evsel;
1068         struct machine *machine;
1069
1070         dump_event(evlist, event, file_offset, sample);
1071
1072         evsel = perf_evlist__id2evsel(evlist, sample->id);
1073
1074         machine = machines__find_for_cpumode(machines, event, sample);
1075
1076         switch (event->header.type) {
1077         case PERF_RECORD_SAMPLE:
1078                 if (evsel == NULL) {
1079                         ++evlist->stats.nr_unknown_id;
1080                         return 0;
1081                 }
1082                 dump_sample(evsel, event, sample);
1083                 if (machine == NULL) {
1084                         ++evlist->stats.nr_unprocessable_samples;
1085                         return 0;
1086                 }
1087                 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1088         case PERF_RECORD_MMAP:
1089                 return tool->mmap(tool, event, sample, machine);
1090         case PERF_RECORD_MMAP2:
1091                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1092                         ++evlist->stats.nr_proc_map_timeout;
1093                 return tool->mmap2(tool, event, sample, machine);
1094         case PERF_RECORD_COMM:
1095                 return tool->comm(tool, event, sample, machine);
1096         case PERF_RECORD_FORK:
1097                 return tool->fork(tool, event, sample, machine);
1098         case PERF_RECORD_EXIT:
1099                 return tool->exit(tool, event, sample, machine);
1100         case PERF_RECORD_LOST:
1101                 if (tool->lost == perf_event__process_lost)
1102                         evlist->stats.total_lost += event->lost.lost;
1103                 return tool->lost(tool, event, sample, machine);
1104         case PERF_RECORD_LOST_SAMPLES:
1105                 if (tool->lost_samples == perf_event__process_lost_samples)
1106                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1107                 return tool->lost_samples(tool, event, sample, machine);
1108         case PERF_RECORD_READ:
1109                 return tool->read(tool, event, sample, evsel, machine);
1110         case PERF_RECORD_THROTTLE:
1111                 return tool->throttle(tool, event, sample, machine);
1112         case PERF_RECORD_UNTHROTTLE:
1113                 return tool->unthrottle(tool, event, sample, machine);
1114         case PERF_RECORD_AUX:
1115                 if (tool->aux == perf_event__process_aux &&
1116                     (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
1117                         evlist->stats.total_aux_lost += 1;
1118                 return tool->aux(tool, event, sample, machine);
1119         case PERF_RECORD_ITRACE_START:
1120                 return tool->itrace_start(tool, event, sample, machine);
1121         case PERF_RECORD_SWITCH:
1122         case PERF_RECORD_SWITCH_CPU_WIDE:
1123                 return tool->context_switch(tool, event, sample, machine);
1124         default:
1125                 ++evlist->stats.nr_unknown_events;
1126                 return -1;
1127         }
1128 }
1129
1130 static int perf_session__deliver_event(struct perf_session *session,
1131                                        union perf_event *event,
1132                                        struct perf_sample *sample,
1133                                        struct perf_tool *tool,
1134                                        u64 file_offset)
1135 {
1136         int ret;
1137
1138         ret = auxtrace__process_event(session, event, sample, tool);
1139         if (ret < 0)
1140                 return ret;
1141         if (ret > 0)
1142                 return 0;
1143
1144         return machines__deliver_event(&session->machines, session->evlist,
1145                                        event, sample, tool, file_offset);
1146 }
1147
1148 static s64 perf_session__process_user_event(struct perf_session *session,
1149                                             union perf_event *event,
1150                                             u64 file_offset)
1151 {
1152         struct ordered_events *oe = &session->ordered_events;
1153         struct perf_tool *tool = session->tool;
1154         int fd = perf_data_file__fd(session->file);
1155         int err;
1156
1157         dump_event(session->evlist, event, file_offset, NULL);
1158
1159         /* These events are processed right away */
1160         switch (event->header.type) {
1161         case PERF_RECORD_HEADER_ATTR:
1162                 err = tool->attr(tool, event, &session->evlist);
1163                 if (err == 0) {
1164                         perf_session__set_id_hdr_size(session);
1165                         perf_session__set_comm_exec(session);
1166                 }
1167                 return err;
1168         case PERF_RECORD_HEADER_EVENT_TYPE:
1169                 /*
1170                  * Depreceated, but we need to handle it for sake
1171                  * of old data files create in pipe mode.
1172                  */
1173                 return 0;
1174         case PERF_RECORD_HEADER_TRACING_DATA:
1175                 /* setup for reading amidst mmap */
1176                 lseek(fd, file_offset, SEEK_SET);
1177                 return tool->tracing_data(tool, event, session);
1178         case PERF_RECORD_HEADER_BUILD_ID:
1179                 return tool->build_id(tool, event, session);
1180         case PERF_RECORD_FINISHED_ROUND:
1181                 return tool->finished_round(tool, event, oe);
1182         case PERF_RECORD_ID_INDEX:
1183                 return tool->id_index(tool, event, session);
1184         case PERF_RECORD_AUXTRACE_INFO:
1185                 return tool->auxtrace_info(tool, event, session);
1186         case PERF_RECORD_AUXTRACE:
1187                 /* setup for reading amidst mmap */
1188                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1189                 return tool->auxtrace(tool, event, session);
1190         case PERF_RECORD_AUXTRACE_ERROR:
1191                 perf_session__auxtrace_error_inc(session, event);
1192                 return tool->auxtrace_error(tool, event, session);
1193         default:
1194                 return -EINVAL;
1195         }
1196 }
1197
1198 int perf_session__deliver_synth_event(struct perf_session *session,
1199                                       union perf_event *event,
1200                                       struct perf_sample *sample)
1201 {
1202         struct perf_evlist *evlist = session->evlist;
1203         struct perf_tool *tool = session->tool;
1204
1205         events_stats__inc(&evlist->stats, event->header.type);
1206
1207         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1208                 return perf_session__process_user_event(session, event, 0);
1209
1210         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1211 }
1212
1213 static void event_swap(union perf_event *event, bool sample_id_all)
1214 {
1215         perf_event__swap_op swap;
1216
1217         swap = perf_event__swap_ops[event->header.type];
1218         if (swap)
1219                 swap(event, sample_id_all);
1220 }
1221
1222 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1223                              void *buf, size_t buf_sz,
1224                              union perf_event **event_ptr,
1225                              struct perf_sample *sample)
1226 {
1227         union perf_event *event;
1228         size_t hdr_sz, rest;
1229         int fd;
1230
1231         if (session->one_mmap && !session->header.needs_swap) {
1232                 event = file_offset - session->one_mmap_offset +
1233                         session->one_mmap_addr;
1234                 goto out_parse_sample;
1235         }
1236
1237         if (perf_data_file__is_pipe(session->file))
1238                 return -1;
1239
1240         fd = perf_data_file__fd(session->file);
1241         hdr_sz = sizeof(struct perf_event_header);
1242
1243         if (buf_sz < hdr_sz)
1244                 return -1;
1245
1246         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1247             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1248                 return -1;
1249
1250         event = (union perf_event *)buf;
1251
1252         if (session->header.needs_swap)
1253                 perf_event_header__bswap(&event->header);
1254
1255         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1256                 return -1;
1257
1258         buf += hdr_sz;
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 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 (session->tool->aux == perf_event__process_aux &&
1365             stats->total_aux_lost != 0) {
1366                 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1367                             stats->total_aux_lost,
1368                             stats->nr_events[PERF_RECORD_AUX]);
1369         }
1370
1371         if (stats->nr_unknown_events != 0) {
1372                 ui__warning("Found %u unknown events!\n\n"
1373                             "Is this an older tool processing a perf.data "
1374                             "file generated by a more recent tool?\n\n"
1375                             "If that is not the case, consider "
1376                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1377                             stats->nr_unknown_events);
1378         }
1379
1380         if (stats->nr_unknown_id != 0) {
1381                 ui__warning("%u samples with id not present in the header\n",
1382                             stats->nr_unknown_id);
1383         }
1384
1385         if (stats->nr_invalid_chains != 0) {
1386                 ui__warning("Found invalid callchains!\n\n"
1387                             "%u out of %u events were discarded for this reason.\n\n"
1388                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1389                             stats->nr_invalid_chains,
1390                             stats->nr_events[PERF_RECORD_SAMPLE]);
1391         }
1392
1393         if (stats->nr_unprocessable_samples != 0) {
1394                 ui__warning("%u unprocessable samples recorded.\n"
1395                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1396                             stats->nr_unprocessable_samples);
1397         }
1398
1399         if (oe->nr_unordered_events != 0)
1400                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1401
1402         events_stats__auxtrace_error_warn(stats);
1403
1404         if (stats->nr_proc_map_timeout != 0) {
1405                 ui__warning("%d map information files for pre-existing threads were\n"
1406                             "not processed, if there are samples for addresses they\n"
1407                             "will not be resolved, you may find out which are these\n"
1408                             "threads by running with -v and redirecting the output\n"
1409                             "to a file.\n"
1410                             "The time limit to process proc map is too short?\n"
1411                             "Increase it by --proc-map-timeout\n",
1412                             stats->nr_proc_map_timeout);
1413         }
1414 }
1415
1416 static int perf_session__flush_thread_stack(struct thread *thread,
1417                                             void *p __maybe_unused)
1418 {
1419         return thread_stack__flush(thread);
1420 }
1421
1422 static int perf_session__flush_thread_stacks(struct perf_session *session)
1423 {
1424         return machines__for_each_thread(&session->machines,
1425                                          perf_session__flush_thread_stack,
1426                                          NULL);
1427 }
1428
1429 volatile int session_done;
1430
1431 static int __perf_session__process_pipe_events(struct perf_session *session)
1432 {
1433         struct ordered_events *oe = &session->ordered_events;
1434         struct perf_tool *tool = session->tool;
1435         int fd = perf_data_file__fd(session->file);
1436         union perf_event *event;
1437         uint32_t size, cur_size = 0;
1438         void *buf = NULL;
1439         s64 skip = 0;
1440         u64 head;
1441         ssize_t err;
1442         void *p;
1443
1444         perf_tool__fill_defaults(tool);
1445
1446         head = 0;
1447         cur_size = sizeof(union perf_event);
1448
1449         buf = malloc(cur_size);
1450         if (!buf)
1451                 return -errno;
1452         ordered_events__set_copy_on_queue(oe, true);
1453 more:
1454         event = buf;
1455         err = readn(fd, event, sizeof(struct perf_event_header));
1456         if (err <= 0) {
1457                 if (err == 0)
1458                         goto done;
1459
1460                 pr_err("failed to read event header\n");
1461                 goto out_err;
1462         }
1463
1464         if (session->header.needs_swap)
1465                 perf_event_header__bswap(&event->header);
1466
1467         size = event->header.size;
1468         if (size < sizeof(struct perf_event_header)) {
1469                 pr_err("bad event header size\n");
1470                 goto out_err;
1471         }
1472
1473         if (size > cur_size) {
1474                 void *new = realloc(buf, size);
1475                 if (!new) {
1476                         pr_err("failed to allocate memory to read event\n");
1477                         goto out_err;
1478                 }
1479                 buf = new;
1480                 cur_size = size;
1481                 event = buf;
1482         }
1483         p = event;
1484         p += sizeof(struct perf_event_header);
1485
1486         if (size - sizeof(struct perf_event_header)) {
1487                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1488                 if (err <= 0) {
1489                         if (err == 0) {
1490                                 pr_err("unexpected end of event stream\n");
1491                                 goto done;
1492                         }
1493
1494                         pr_err("failed to read event data\n");
1495                         goto out_err;
1496                 }
1497         }
1498
1499         if ((skip = perf_session__process_event(session, event, head)) < 0) {
1500                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1501                        head, event->header.size, event->header.type);
1502                 err = -EINVAL;
1503                 goto out_err;
1504         }
1505
1506         head += size;
1507
1508         if (skip > 0)
1509                 head += skip;
1510
1511         if (!session_done())
1512                 goto more;
1513 done:
1514         /* do the final flush for ordered samples */
1515         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1516         if (err)
1517                 goto out_err;
1518         err = auxtrace__flush_events(session, tool);
1519         if (err)
1520                 goto out_err;
1521         err = perf_session__flush_thread_stacks(session);
1522 out_err:
1523         free(buf);
1524         perf_session__warn_about_errors(session);
1525         ordered_events__free(&session->ordered_events);
1526         auxtrace__free_events(session);
1527         return err;
1528 }
1529
1530 static union perf_event *
1531 fetch_mmaped_event(struct perf_session *session,
1532                    u64 head, size_t mmap_size, char *buf)
1533 {
1534         union perf_event *event;
1535
1536         /*
1537          * Ensure we have enough space remaining to read
1538          * the size of the event in the headers.
1539          */
1540         if (head + sizeof(event->header) > mmap_size)
1541                 return NULL;
1542
1543         event = (union perf_event *)(buf + head);
1544
1545         if (session->header.needs_swap)
1546                 perf_event_header__bswap(&event->header);
1547
1548         if (head + event->header.size > mmap_size) {
1549                 /* We're not fetching the event so swap back again */
1550                 if (session->header.needs_swap)
1551                         perf_event_header__bswap(&event->header);
1552                 return NULL;
1553         }
1554
1555         return event;
1556 }
1557
1558 /*
1559  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1560  * slices. On 32bit we use 32MB.
1561  */
1562 #if BITS_PER_LONG == 64
1563 #define MMAP_SIZE ULLONG_MAX
1564 #define NUM_MMAPS 1
1565 #else
1566 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1567 #define NUM_MMAPS 128
1568 #endif
1569
1570 static int __perf_session__process_events(struct perf_session *session,
1571                                           u64 data_offset, u64 data_size,
1572                                           u64 file_size)
1573 {
1574         struct ordered_events *oe = &session->ordered_events;
1575         struct perf_tool *tool = session->tool;
1576         int fd = perf_data_file__fd(session->file);
1577         u64 head, page_offset, file_offset, file_pos, size;
1578         int err, mmap_prot, mmap_flags, map_idx = 0;
1579         size_t  mmap_size;
1580         char *buf, *mmaps[NUM_MMAPS];
1581         union perf_event *event;
1582         struct ui_progress prog;
1583         s64 skip;
1584
1585         perf_tool__fill_defaults(tool);
1586
1587         page_offset = page_size * (data_offset / page_size);
1588         file_offset = page_offset;
1589         head = data_offset - page_offset;
1590
1591         if (data_size == 0)
1592                 goto out;
1593
1594         if (data_offset + data_size < file_size)
1595                 file_size = data_offset + data_size;
1596
1597         ui_progress__init(&prog, file_size, "Processing events...");
1598
1599         mmap_size = MMAP_SIZE;
1600         if (mmap_size > file_size) {
1601                 mmap_size = file_size;
1602                 session->one_mmap = true;
1603         }
1604
1605         memset(mmaps, 0, sizeof(mmaps));
1606
1607         mmap_prot  = PROT_READ;
1608         mmap_flags = MAP_SHARED;
1609
1610         if (session->header.needs_swap) {
1611                 mmap_prot  |= PROT_WRITE;
1612                 mmap_flags = MAP_PRIVATE;
1613         }
1614 remap:
1615         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1616                    file_offset);
1617         if (buf == MAP_FAILED) {
1618                 pr_err("failed to mmap file\n");
1619                 err = -errno;
1620                 goto out_err;
1621         }
1622         mmaps[map_idx] = buf;
1623         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1624         file_pos = file_offset + head;
1625         if (session->one_mmap) {
1626                 session->one_mmap_addr = buf;
1627                 session->one_mmap_offset = file_offset;
1628         }
1629
1630 more:
1631         event = fetch_mmaped_event(session, head, mmap_size, buf);
1632         if (!event) {
1633                 if (mmaps[map_idx]) {
1634                         munmap(mmaps[map_idx], mmap_size);
1635                         mmaps[map_idx] = NULL;
1636                 }
1637
1638                 page_offset = page_size * (head / page_size);
1639                 file_offset += page_offset;
1640                 head -= page_offset;
1641                 goto remap;
1642         }
1643
1644         size = event->header.size;
1645
1646         if (size < sizeof(struct perf_event_header) ||
1647             (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1648                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1649                        file_offset + head, event->header.size,
1650                        event->header.type);
1651                 err = -EINVAL;
1652                 goto out_err;
1653         }
1654
1655         if (skip)
1656                 size += skip;
1657
1658         head += size;
1659         file_pos += size;
1660
1661         ui_progress__update(&prog, size);
1662
1663         if (session_done())
1664                 goto out;
1665
1666         if (file_pos < file_size)
1667                 goto more;
1668
1669 out:
1670         /* do the final flush for ordered samples */
1671         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1672         if (err)
1673                 goto out_err;
1674         err = auxtrace__flush_events(session, tool);
1675         if (err)
1676                 goto out_err;
1677         err = perf_session__flush_thread_stacks(session);
1678 out_err:
1679         ui_progress__finish();
1680         perf_session__warn_about_errors(session);
1681         ordered_events__free(&session->ordered_events);
1682         auxtrace__free_events(session);
1683         session->one_mmap = false;
1684         return err;
1685 }
1686
1687 int perf_session__process_events(struct perf_session *session)
1688 {
1689         u64 size = perf_data_file__size(session->file);
1690         int err;
1691
1692         if (perf_session__register_idle_thread(session) == NULL)
1693                 return -ENOMEM;
1694
1695         if (!perf_data_file__is_pipe(session->file))
1696                 err = __perf_session__process_events(session,
1697                                                      session->header.data_offset,
1698                                                      session->header.data_size, size);
1699         else
1700                 err = __perf_session__process_pipe_events(session);
1701
1702         return err;
1703 }
1704
1705 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1706 {
1707         struct perf_evsel *evsel;
1708
1709         evlist__for_each(session->evlist, evsel) {
1710                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1711                         return true;
1712         }
1713
1714         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1715         return false;
1716 }
1717
1718 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1719                                      const char *symbol_name, u64 addr)
1720 {
1721         char *bracket;
1722         enum map_type i;
1723         struct ref_reloc_sym *ref;
1724
1725         ref = zalloc(sizeof(struct ref_reloc_sym));
1726         if (ref == NULL)
1727                 return -ENOMEM;
1728
1729         ref->name = strdup(symbol_name);
1730         if (ref->name == NULL) {
1731                 free(ref);
1732                 return -ENOMEM;
1733         }
1734
1735         bracket = strchr(ref->name, ']');
1736         if (bracket)
1737                 *bracket = '\0';
1738
1739         ref->addr = addr;
1740
1741         for (i = 0; i < MAP__NR_TYPES; ++i) {
1742                 struct kmap *kmap = map__kmap(maps[i]);
1743
1744                 if (!kmap)
1745                         continue;
1746                 kmap->ref_reloc_sym = ref;
1747         }
1748
1749         return 0;
1750 }
1751
1752 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1753 {
1754         return machines__fprintf_dsos(&session->machines, fp);
1755 }
1756
1757 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1758                                           bool (skip)(struct dso *dso, int parm), int parm)
1759 {
1760         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1761 }
1762
1763 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1764 {
1765         size_t ret;
1766         const char *msg = "";
1767
1768         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1769                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1770
1771         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1772
1773         ret += events_stats__fprintf(&session->evlist->stats, fp);
1774         return ret;
1775 }
1776
1777 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1778 {
1779         /*
1780          * FIXME: Here we have to actually print all the machines in this
1781          * session, not just the host...
1782          */
1783         return machine__fprintf(&session->machines.host, fp);
1784 }
1785
1786 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1787                                               unsigned int type)
1788 {
1789         struct perf_evsel *pos;
1790
1791         evlist__for_each(session->evlist, pos) {
1792                 if (pos->attr.type == type)
1793                         return pos;
1794         }
1795         return NULL;
1796 }
1797
1798 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1799                           struct addr_location *al,
1800                           unsigned int print_opts, unsigned int stack_depth)
1801 {
1802         struct callchain_cursor_node *node;
1803         int print_ip = print_opts & PRINT_IP_OPT_IP;
1804         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1805         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1806         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1807         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1808         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1809         char s = print_oneline ? ' ' : '\t';
1810
1811         if (symbol_conf.use_callchain && sample->callchain) {
1812                 struct addr_location node_al;
1813
1814                 if (thread__resolve_callchain(al->thread, evsel,
1815                                               sample, NULL, NULL,
1816                                               stack_depth) != 0) {
1817                         if (verbose)
1818                                 error("Failed to resolve callchain. Skipping\n");
1819                         return;
1820                 }
1821                 callchain_cursor_commit(&callchain_cursor);
1822
1823                 if (print_symoffset)
1824                         node_al = *al;
1825
1826                 while (stack_depth) {
1827                         u64 addr = 0;
1828
1829                         node = callchain_cursor_current(&callchain_cursor);
1830                         if (!node)
1831                                 break;
1832
1833                         if (node->sym && node->sym->ignore)
1834                                 goto next;
1835
1836                         if (print_ip)
1837                                 printf("%c%16" PRIx64, s, node->ip);
1838
1839                         if (node->map)
1840                                 addr = node->map->map_ip(node->map, node->ip);
1841
1842                         if (print_sym) {
1843                                 printf(" ");
1844                                 if (print_symoffset) {
1845                                         node_al.addr = addr;
1846                                         node_al.map  = node->map;
1847                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1848                                 } else
1849                                         symbol__fprintf_symname(node->sym, stdout);
1850                         }
1851
1852                         if (print_dso) {
1853                                 printf(" (");
1854                                 map__fprintf_dsoname(node->map, stdout);
1855                                 printf(")");
1856                         }
1857
1858                         if (print_srcline)
1859                                 map__fprintf_srcline(node->map, addr, "\n  ",
1860                                                      stdout);
1861
1862                         if (!print_oneline)
1863                                 printf("\n");
1864
1865                         stack_depth--;
1866 next:
1867                         callchain_cursor_advance(&callchain_cursor);
1868                 }
1869
1870         } else {
1871                 if (al->sym && al->sym->ignore)
1872                         return;
1873
1874                 if (print_ip)
1875                         printf("%16" PRIx64, sample->ip);
1876
1877                 if (print_sym) {
1878                         printf(" ");
1879                         if (print_symoffset)
1880                                 symbol__fprintf_symname_offs(al->sym, al,
1881                                                              stdout);
1882                         else
1883                                 symbol__fprintf_symname(al->sym, stdout);
1884                 }
1885
1886                 if (print_dso) {
1887                         printf(" (");
1888                         map__fprintf_dsoname(al->map, stdout);
1889                         printf(")");
1890                 }
1891
1892                 if (print_srcline)
1893                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
1894         }
1895 }
1896
1897 int perf_session__cpu_bitmap(struct perf_session *session,
1898                              const char *cpu_list, unsigned long *cpu_bitmap)
1899 {
1900         int i, err = -1;
1901         struct cpu_map *map;
1902
1903         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1904                 struct perf_evsel *evsel;
1905
1906                 evsel = perf_session__find_first_evtype(session, i);
1907                 if (!evsel)
1908                         continue;
1909
1910                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1911                         pr_err("File does not contain CPU events. "
1912                                "Remove -c option to proceed.\n");
1913                         return -1;
1914                 }
1915         }
1916
1917         map = cpu_map__new(cpu_list);
1918         if (map == NULL) {
1919                 pr_err("Invalid cpu_list\n");
1920                 return -1;
1921         }
1922
1923         for (i = 0; i < map->nr; i++) {
1924                 int cpu = map->map[i];
1925
1926                 if (cpu >= MAX_NR_CPUS) {
1927                         pr_err("Requested CPU %d too large. "
1928                                "Consider raising MAX_NR_CPUS\n", cpu);
1929                         goto out_delete_map;
1930                 }
1931
1932                 set_bit(cpu, cpu_bitmap);
1933         }
1934
1935         err = 0;
1936
1937 out_delete_map:
1938         cpu_map__put(map);
1939         return err;
1940 }
1941
1942 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1943                                 bool full)
1944 {
1945         struct stat st;
1946         int fd, ret;
1947
1948         if (session == NULL || fp == NULL)
1949                 return;
1950
1951         fd = perf_data_file__fd(session->file);
1952
1953         ret = fstat(fd, &st);
1954         if (ret == -1)
1955                 return;
1956
1957         fprintf(fp, "# ========\n");
1958         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1959         perf_header__fprintf_info(session, fp, full);
1960         fprintf(fp, "# ========\n#\n");
1961 }
1962
1963
1964 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1965                                              const struct perf_evsel_str_handler *assocs,
1966                                              size_t nr_assocs)
1967 {
1968         struct perf_evsel *evsel;
1969         size_t i;
1970         int err;
1971
1972         for (i = 0; i < nr_assocs; i++) {
1973                 /*
1974                  * Adding a handler for an event not in the session,
1975                  * just ignore it.
1976                  */
1977                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1978                 if (evsel == NULL)
1979                         continue;
1980
1981                 err = -EEXIST;
1982                 if (evsel->handler != NULL)
1983                         goto out;
1984                 evsel->handler = assocs[i].handler;
1985         }
1986
1987         err = 0;
1988 out:
1989         return err;
1990 }
1991
1992 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
1993                                  union perf_event *event,
1994                                  struct perf_session *session)
1995 {
1996         struct perf_evlist *evlist = session->evlist;
1997         struct id_index_event *ie = &event->id_index;
1998         size_t i, nr, max_nr;
1999
2000         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2001                  sizeof(struct id_index_entry);
2002         nr = ie->nr;
2003         if (nr > max_nr)
2004                 return -EINVAL;
2005
2006         if (dump_trace)
2007                 fprintf(stdout, " nr: %zu\n", nr);
2008
2009         for (i = 0; i < nr; i++) {
2010                 struct id_index_entry *e = &ie->entries[i];
2011                 struct perf_sample_id *sid;
2012
2013                 if (dump_trace) {
2014                         fprintf(stdout, " ... id: %"PRIu64, e->id);
2015                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
2016                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
2017                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
2018                 }
2019
2020                 sid = perf_evlist__id2sid(evlist, e->id);
2021                 if (!sid)
2022                         return -ENOENT;
2023                 sid->idx = e->idx;
2024                 sid->cpu = e->cpu;
2025                 sid->tid = e->tid;
2026         }
2027         return 0;
2028 }
2029
2030 int perf_event__synthesize_id_index(struct perf_tool *tool,
2031                                     perf_event__handler_t process,
2032                                     struct perf_evlist *evlist,
2033                                     struct machine *machine)
2034 {
2035         union perf_event *ev;
2036         struct perf_evsel *evsel;
2037         size_t nr = 0, i = 0, sz, max_nr, n;
2038         int err;
2039
2040         pr_debug2("Synthesizing id index\n");
2041
2042         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2043                  sizeof(struct id_index_entry);
2044
2045         evlist__for_each(evlist, evsel)
2046                 nr += evsel->ids;
2047
2048         n = nr > max_nr ? max_nr : nr;
2049         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2050         ev = zalloc(sz);
2051         if (!ev)
2052                 return -ENOMEM;
2053
2054         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2055         ev->id_index.header.size = sz;
2056         ev->id_index.nr = n;
2057
2058         evlist__for_each(evlist, evsel) {
2059                 u32 j;
2060
2061                 for (j = 0; j < evsel->ids; j++) {
2062                         struct id_index_entry *e;
2063                         struct perf_sample_id *sid;
2064
2065                         if (i >= n) {
2066                                 err = process(tool, ev, NULL, machine);
2067                                 if (err)
2068                                         goto out_err;
2069                                 nr -= n;
2070                                 i = 0;
2071                         }
2072
2073                         e = &ev->id_index.entries[i++];
2074
2075                         e->id = evsel->id[j];
2076
2077                         sid = perf_evlist__id2sid(evlist, e->id);
2078                         if (!sid) {
2079                                 free(ev);
2080                                 return -ENOENT;
2081                         }
2082
2083                         e->idx = sid->idx;
2084                         e->cpu = sid->cpu;
2085                         e->tid = sid->tid;
2086                 }
2087         }
2088
2089         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2090         ev->id_index.header.size = sz;
2091         ev->id_index.nr = nr;
2092
2093         err = process(tool, ev, NULL, machine);
2094 out_err:
2095         free(ev);
2096
2097         return err;
2098 }