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                         perf_session__set_id_hdr_size(session);
 139                         perf_session__set_comm_exec(session);
 140                 }
 141         } else  {
 142                 session->machines.host.env = &perf_env;
 143         }
 144
 145         if (!file || perf_data_file__is_write(file)) {
 146                 /*
 147                  * In O_RDONLY mode this will be performed when reading the
 148                  * kernel MMAP event, in perf_event__process_mmap().
 149                  */
 150                 if (perf_session__create_kernel_maps(session) < 0)
 151                         pr_warning("Cannot read kernel map\n");
 152         }
 153
 154         if (tool && tool->ordering_requires_timestamps &&
 155             tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
 156                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 157                 tool->ordered_events = false;
 158         }
 159
 160         return session;
 161
 162  out_close:
 163         perf_data_file__close(file);
 164  out_delete:
 165         perf_session__delete(session);
 166  out:
 167         return NULL;
 168 }
 169
 170 static void perf_session__delete_threads(struct perf_session *session)
 171 {
 172         machine__delete_threads(&session->machines.host);
 173 }
 174
 175 void perf_session__delete(struct perf_session *session)
 176 {
 177         auxtrace__free(session);
 178         auxtrace_index__free(&session->auxtrace_index);
 179         perf_session__destroy_kernel_maps(session);
 180         perf_session__delete_threads(session);
 181         perf_env__exit(&session->header.env);
 182         machines__exit(&session->machines);
 183         if (session->file)
 184                 perf_data_file__close(session->file);
 185         free(session);
 186 }
 187
 188 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 189                                                  __maybe_unused,
 190                                                  union perf_event *event
 191                                                  __maybe_unused,
 192                                                  struct perf_session *session
 193                                                 __maybe_unused)
 194 {
 195         dump_printf(": unhandled!\n");
 196         return 0;
 197 }
 198
 199 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 200                                          union perf_event *event __maybe_unused,
 201                                          struct perf_evlist **pevlist
 202                                          __maybe_unused)
 203 {
 204         dump_printf(": unhandled!\n");
 205         return 0;
 206 }
 207
 208 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 209                                      union perf_event *event __maybe_unused,
 210                                      struct perf_sample *sample __maybe_unused,
 211                                      struct perf_evsel *evsel __maybe_unused,
 212                                      struct machine *machine __maybe_unused)
 213 {
 214         dump_printf(": unhandled!\n");
 215         return 0;
 216 }
 217
 218 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 219                               union perf_event *event __maybe_unused,
 220                               struct perf_sample *sample __maybe_unused,
 221                               struct machine *machine __maybe_unused)
 222 {
 223         dump_printf(": unhandled!\n");
 224         return 0;
 225 }
 226
 227 static int process_build_id_stub(struct perf_tool *tool __maybe_unused,
 228                                  union perf_event *event __maybe_unused,
 229                                  struct perf_session *session __maybe_unused)
 230 {
 231         dump_printf(": unhandled!\n");
 232         return 0;
 233 }
 234
 235 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 236                                        union perf_event *event __maybe_unused,
 237                                        struct ordered_events *oe __maybe_unused)
 238 {
 239         dump_printf(": unhandled!\n");
 240         return 0;
 241 }
 242
 243 static int process_finished_round(struct perf_tool *tool,
 244                                   union perf_event *event,
 245                                   struct ordered_events *oe);
 246
 247 static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
 248                                  union perf_event *event __maybe_unused,
 249                                  struct perf_session *perf_session
 250                                  __maybe_unused)
 251 {
 252         dump_printf(": unhandled!\n");
 253         return 0;
 254 }
 255
 256 static int process_event_auxtrace_info_stub(struct perf_tool *tool __maybe_unused,
 257                                 union perf_event *event __maybe_unused,
 258                                 struct perf_session *session __maybe_unused)
 259 {
 260         dump_printf(": unhandled!\n");
 261         return 0;
 262 }
 263
 264 static int skipn(int fd, off_t n)
 265 {
 266         char buf[4096];
 267         ssize_t ret;
 268
 269         while (n > 0) {
 270                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 271                 if (ret <= 0)
 272                         return ret;
 273                 n -= ret;
 274         }
 275
 276         return 0;
 277 }
 278
 279 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
 280                                        union perf_event *event,
 281                                        struct perf_session *session
 282                                        __maybe_unused)
 283 {
 284         dump_printf(": unhandled!\n");
 285         if (perf_data_file__is_pipe(session->file))
 286                 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
 287         return event->auxtrace.size;
 288 }
 289
 290 static
 291 int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
 292                                       union perf_event *event __maybe_unused,
 293                                       struct perf_session *session __maybe_unused)
 294 {
 295         dump_printf(": unhandled!\n");
 296         return 0;
 297 }
 298
 299 void perf_tool__fill_defaults(struct perf_tool *tool)
 300 {
 301         if (tool->sample == NULL)
 302                 tool->sample = process_event_sample_stub;
 303         if (tool->mmap == NULL)
 304                 tool->mmap = process_event_stub;
 305         if (tool->mmap2 == NULL)
 306                 tool->mmap2 = process_event_stub;
 307         if (tool->comm == NULL)
 308                 tool->comm = process_event_stub;
 309         if (tool->fork == NULL)
 310                 tool->fork = process_event_stub;
 311         if (tool->exit == NULL)
 312                 tool->exit = process_event_stub;
 313         if (tool->lost == NULL)
 314                 tool->lost = perf_event__process_lost;
 315         if (tool->lost_samples == NULL)
 316                 tool->lost_samples = perf_event__process_lost_samples;
 317         if (tool->aux == NULL)
 318                 tool->aux = perf_event__process_aux;
 319         if (tool->itrace_start == NULL)
 320                 tool->itrace_start = perf_event__process_itrace_start;
 321         if (tool->context_switch == NULL)
 322                 tool->context_switch = perf_event__process_switch;
 323         if (tool->read == NULL)
 324                 tool->read = process_event_sample_stub;
 325         if (tool->throttle == NULL)
 326                 tool->throttle = process_event_stub;
 327         if (tool->unthrottle == NULL)
 328                 tool->unthrottle = process_event_stub;
 329         if (tool->attr == NULL)
 330                 tool->attr = process_event_synth_attr_stub;
 331         if (tool->tracing_data == NULL)
 332                 tool->tracing_data = process_event_synth_tracing_data_stub;
 333         if (tool->build_id == NULL)
 334                 tool->build_id = process_build_id_stub;
 335         if (tool->finished_round == NULL) {
 336                 if (tool->ordered_events)
 337                         tool->finished_round = process_finished_round;
 338                 else
 339                         tool->finished_round = process_finished_round_stub;
 340         }
 341         if (tool->id_index == NULL)
 342                 tool->id_index = process_id_index_stub;
 343         if (tool->auxtrace_info == NULL)
 344                 tool->auxtrace_info = process_event_auxtrace_info_stub;
 345         if (tool->auxtrace == NULL)
 346                 tool->auxtrace = process_event_auxtrace_stub;
 347         if (tool->auxtrace_error == NULL)
 348                 tool->auxtrace_error = process_event_auxtrace_error_stub;
 349 }
 350
 351 static void swap_sample_id_all(union perf_event *event, void *data)
 352 {
 353         void *end = (void *) event + event->header.size;
 354         int size = end - data;
 355
 356         BUG_ON(size % sizeof(u64));
 357         mem_bswap_64(data, size);
 358 }
 359
 360 static void perf_event__all64_swap(union perf_event *event,
 361                                    bool sample_id_all __maybe_unused)
 362 {
 363         struct perf_event_header *hdr = &event->header;
 364         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 365 }
 366
 367 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 368 {
 369         event->comm.pid = bswap_32(event->comm.pid);
 370         event->comm.tid = bswap_32(event->comm.tid);
 371
 372         if (sample_id_all) {
 373                 void *data = &event->comm.comm;
 374
 375                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 376                 swap_sample_id_all(event, data);
 377         }
 378 }
 379
 380 static void perf_event__mmap_swap(union perf_event *event,
 381                                   bool sample_id_all)
 382 {
 383         event->mmap.pid   = bswap_32(event->mmap.pid);
 384         event->mmap.tid   = bswap_32(event->mmap.tid);
 385         event->mmap.start = bswap_64(event->mmap.start);
 386         event->mmap.len   = bswap_64(event->mmap.len);
 387         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 388
 389         if (sample_id_all) {
 390                 void *data = &event->mmap.filename;
 391
 392                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 393                 swap_sample_id_all(event, data);
 394         }
 395 }
 396
 397 static void perf_event__mmap2_swap(union perf_event *event,
 398                                   bool sample_id_all)
 399 {
 400         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 401         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 402         event->mmap2.start = bswap_64(event->mmap2.start);
 403         event->mmap2.len   = bswap_64(event->mmap2.len);
 404         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 405         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 406         event->mmap2.min   = bswap_32(event->mmap2.min);
 407         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 408
 409         if (sample_id_all) {
 410                 void *data = &event->mmap2.filename;
 411
 412                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 413                 swap_sample_id_all(event, data);
 414         }
 415 }
 416 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 417 {
 418         event->fork.pid  = bswap_32(event->fork.pid);
 419         event->fork.tid  = bswap_32(event->fork.tid);
 420         event->fork.ppid = bswap_32(event->fork.ppid);
 421         event->fork.ptid = bswap_32(event->fork.ptid);
 422         event->fork.time = bswap_64(event->fork.time);
 423
 424         if (sample_id_all)
 425                 swap_sample_id_all(event, &event->fork + 1);
 426 }
 427
 428 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 429 {
 430         event->read.pid          = bswap_32(event->read.pid);
 431         event->read.tid          = bswap_32(event->read.tid);
 432         event->read.value        = bswap_64(event->read.value);
 433         event->read.time_enabled = bswap_64(event->read.time_enabled);
 434         event->read.time_running = bswap_64(event->read.time_running);
 435         event->read.id           = bswap_64(event->read.id);
 436
 437         if (sample_id_all)
 438                 swap_sample_id_all(event, &event->read + 1);
 439 }
 440
 441 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 442 {
 443         event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 444         event->aux.aux_size   = bswap_64(event->aux.aux_size);
 445         event->aux.flags      = bswap_64(event->aux.flags);
 446
 447         if (sample_id_all)
 448                 swap_sample_id_all(event, &event->aux + 1);
 449 }
 450
 451 static void perf_event__itrace_start_swap(union perf_event *event,
 452                                           bool sample_id_all)
 453 {
 454         event->itrace_start.pid  = bswap_32(event->itrace_start.pid);
 455         event->itrace_start.tid  = bswap_32(event->itrace_start.tid);
 456
 457         if (sample_id_all)
 458                 swap_sample_id_all(event, &event->itrace_start + 1);
 459 }
 460
 461 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 462 {
 463         if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 464                 event->context_switch.next_prev_pid =
 465                                 bswap_32(event->context_switch.next_prev_pid);
 466                 event->context_switch.next_prev_tid =
 467                                 bswap_32(event->context_switch.next_prev_tid);
 468         }
 469
 470         if (sample_id_all)
 471                 swap_sample_id_all(event, &event->context_switch + 1);
 472 }
 473
 474 static void perf_event__throttle_swap(union perf_event *event,
 475                                       bool sample_id_all)
 476 {
 477         event->throttle.time      = bswap_64(event->throttle.time);
 478         event->throttle.id        = bswap_64(event->throttle.id);
 479         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 480
 481         if (sample_id_all)
 482                 swap_sample_id_all(event, &event->throttle + 1);
 483 }
 484
 485 static u8 revbyte(u8 b)
 486 {
 487         int rev = (b >> 4) | ((b & 0xf) << 4);
 488         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 489         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 490         return (u8) rev;
 491 }
 492
 493 /*
 494  * XXX this is hack in attempt to carry flags bitfield
 495  * throught endian village. ABI says:
 496  *
 497  * Bit-fields are allocated from right to left (least to most significant)
 498  * on little-endian implementations and from left to right (most to least
 499  * significant) on big-endian implementations.
 500  *
 501  * The above seems to be byte specific, so we need to reverse each
 502  * byte of the bitfield. 'Internet' also says this might be implementation
 503  * specific and we probably need proper fix and carry perf_event_attr
 504  * bitfield flags in separate data file FEAT_ section. Thought this seems
 505  * to work for now.
 506  */
 507 static void swap_bitfield(u8 *p, unsigned len)
 508 {
 509         unsigned i;
 510
 511         for (i = 0; i < len; i++) {
 512                 *p = revbyte(*p);
 513                 p++;
 514         }
 515 }
 516
 517 /* exported for swapping attributes in file header */
 518 void perf_event__attr_swap(struct perf_event_attr *attr)
 519 {
 520         attr->type              = bswap_32(attr->type);
 521         attr->size              = bswap_32(attr->size);
 522
 523 #define bswap_safe(f, n)                                        \
 524         (attr->size > (offsetof(struct perf_event_attr, f) +    \
 525                        sizeof(attr->f) * (n)))
 526 #define bswap_field(f, sz)                      \
 527 do {                                            \
 528         if (bswap_safe(f, 0))                   \
 529                 attr->f = bswap_##sz(attr->f);  \
 530 } while(0)
 531 #define bswap_field_32(f) bswap_field(f, 32)
 532 #define bswap_field_64(f) bswap_field(f, 64)
 533
 534         bswap_field_64(config);
 535         bswap_field_64(sample_period);
 536         bswap_field_64(sample_type);
 537         bswap_field_64(read_format);
 538         bswap_field_32(wakeup_events);
 539         bswap_field_32(bp_type);
 540         bswap_field_64(bp_addr);
 541         bswap_field_64(bp_len);
 542         bswap_field_64(branch_sample_type);
 543         bswap_field_64(sample_regs_user);
 544         bswap_field_32(sample_stack_user);
 545         bswap_field_32(aux_watermark);
 546
 547         /*
 548          * After read_format are bitfields. Check read_format because
 549          * we are unable to use offsetof on bitfield.
 550          */
 551         if (bswap_safe(read_format, 1))
 552                 swap_bitfield((u8 *) (&attr->read_format + 1),
 553                               sizeof(u64));
 554 #undef bswap_field_64
 555 #undef bswap_field_32
 556 #undef bswap_field
 557 #undef bswap_safe
 558 }
 559
 560 static void perf_event__hdr_attr_swap(union perf_event *event,
 561                                       bool sample_id_all __maybe_unused)
 562 {
 563         size_t size;
 564
 565         perf_event__attr_swap(&event->attr.attr);
 566
 567         size = event->header.size;
 568         size -= (void *)&event->attr.id - (void *)event;
 569         mem_bswap_64(event->attr.id, size);
 570 }
 571
 572 static void perf_event__event_type_swap(union perf_event *event,
 573                                         bool sample_id_all __maybe_unused)
 574 {
 575         event->event_type.event_type.event_id =
 576                 bswap_64(event->event_type.event_type.event_id);
 577 }
 578
 579 static void perf_event__tracing_data_swap(union perf_event *event,
 580                                           bool sample_id_all __maybe_unused)
 581 {
 582         event->tracing_data.size = bswap_32(event->tracing_data.size);
 583 }
 584
 585 static void perf_event__auxtrace_info_swap(union perf_event *event,
 586                                            bool sample_id_all __maybe_unused)
 587 {
 588         size_t size;
 589
 590         event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 591
 592         size = event->header.size;
 593         size -= (void *)&event->auxtrace_info.priv - (void *)event;
 594         mem_bswap_64(event->auxtrace_info.priv, size);
 595 }
 596
 597 static void perf_event__auxtrace_swap(union perf_event *event,
 598                                       bool sample_id_all __maybe_unused)
 599 {
 600         event->auxtrace.size      = bswap_64(event->auxtrace.size);
 601         event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 602         event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 603         event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 604         event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 605         event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 606 }
 607
 608 static void perf_event__auxtrace_error_swap(union perf_event *event,
 609                                             bool sample_id_all __maybe_unused)
 610 {
 611         event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 612         event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 613         event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 614         event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 615         event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 616         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 617 }
 618
 619 typedef void (*perf_event__swap_op)(union perf_event *event,
 620                                     bool sample_id_all);
 621
 622 static perf_event__swap_op perf_event__swap_ops[] = {
 623         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 624         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 625         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 626         [PERF_RECORD_FORK]                = perf_event__task_swap,
 627         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 628         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 629         [PERF_RECORD_READ]                = perf_event__read_swap,
 630         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 631         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 632         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 633         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
 634         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
 635         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
 636         [PERF_RECORD_SWITCH]              = perf_event__switch_swap,
 637         [PERF_RECORD_SWITCH_CPU_WIDE]     = perf_event__switch_swap,
 638         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 639         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 640         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 641         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 642         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
 643         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
 644         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
 645         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
 646         [PERF_RECORD_HEADER_MAX]          = NULL,
 647 };
 648
 649 /*
 650  * When perf record finishes a pass on every buffers, it records this pseudo
 651  * event.
 652  * We record the max timestamp t found in the pass n.
 653  * Assuming these timestamps are monotonic across cpus, we know that if
 654  * a buffer still has events with timestamps below t, they will be all
 655  * available and then read in the pass n + 1.
 656  * Hence when we start to read the pass n + 2, we can safely flush every
 657  * events with timestamps below t.
 658  *
 659  *    ============ PASS n =================
 660  *       CPU 0         |   CPU 1
 661  *                     |
 662  *    cnt1 timestamps  |   cnt2 timestamps
 663  *          1          |         2
 664  *          2          |         3
 665  *          -          |         4  <--- max recorded
 666  *
 667  *    ============ PASS n + 1 ==============
 668  *       CPU 0         |   CPU 1
 669  *                     |
 670  *    cnt1 timestamps  |   cnt2 timestamps
 671  *          3          |         5
 672  *          4          |         6
 673  *          5          |         7 <---- max recorded
 674  *
 675  *      Flush every events below timestamp 4
 676  *
 677  *    ============ PASS n + 2 ==============
 678  *       CPU 0         |   CPU 1
 679  *                     |
 680  *    cnt1 timestamps  |   cnt2 timestamps
 681  *          6          |         8
 682  *          7          |         9
 683  *          -          |         10
 684  *
 685  *      Flush every events below timestamp 7
 686  *      etc...
 687  */
 688 static int process_finished_round(struct perf_tool *tool __maybe_unused,
 689                                   union perf_event *event __maybe_unused,
 690                                   struct ordered_events *oe)
 691 {
 692         if (dump_trace)
 693                 fprintf(stdout, "\n");
 694         return ordered_events__flush(oe, OE_FLUSH__ROUND);
 695 }
 696
 697 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
 698                               struct perf_sample *sample, u64 file_offset)
 699 {
 700         return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
 701 }
 702
 703 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 704 {
 705         struct ip_callchain *callchain = sample->callchain;
 706         struct branch_stack *lbr_stack = sample->branch_stack;
 707         u64 kernel_callchain_nr = callchain->nr;
 708         unsigned int i;
 709
 710         for (i = 0; i < kernel_callchain_nr; i++) {
 711                 if (callchain->ips[i] == PERF_CONTEXT_USER)
 712                         break;
 713         }
 714
 715         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 716                 u64 total_nr;
 717                 /*
 718                  * LBR callstack can only get user call chain,
 719                  * i is kernel call chain number,
 720                  * 1 is PERF_CONTEXT_USER.
 721                  *
 722                  * The user call chain is stored in LBR registers.
 723                  * LBR are pair registers. The caller is stored
 724                  * in "from" register, while the callee is stored
 725                  * in "to" register.
 726                  * For example, there is a call stack
 727                  * "A"->"B"->"C"->"D".
 728                  * The LBR registers will recorde like
 729                  * "C"->"D", "B"->"C", "A"->"B".
 730                  * So only the first "to" register and all "from"
 731                  * registers are needed to construct the whole stack.
 732                  */
 733                 total_nr = i + 1 + lbr_stack->nr + 1;
 734                 kernel_callchain_nr = i + 1;
 735
 736                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 737
 738                 for (i = 0; i < kernel_callchain_nr; i++)
 739                         printf("..... %2d: %016" PRIx64 "\n",
 740                                i, callchain->ips[i]);
 741
 742                 printf("..... %2d: %016" PRIx64 "\n",
 743                        (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 744                 for (i = 0; i < lbr_stack->nr; i++)
 745                         printf("..... %2d: %016" PRIx64 "\n",
 746                                (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 747         }
 748 }
 749
 750 static void callchain__printf(struct perf_evsel *evsel,
 751                               struct perf_sample *sample)
 752 {
 753         unsigned int i;
 754         struct ip_callchain *callchain = sample->callchain;
 755
 756         if (has_branch_callstack(evsel))
 757                 callchain__lbr_callstack_printf(sample);
 758
 759         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 760
 761         for (i = 0; i < callchain->nr; i++)
 762                 printf("..... %2d: %016" PRIx64 "\n",
 763                        i, callchain->ips[i]);
 764 }
 765
 766 static void branch_stack__printf(struct perf_sample *sample)
 767 {
 768         uint64_t i;
 769
 770         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 771
 772         for (i = 0; i < sample->branch_stack->nr; i++) {
 773                 struct branch_entry *e = &sample->branch_stack->entries[i];
 774
 775                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
 776                         i, e->from, e->to,
 777                         e->flags.cycles,
 778                         e->flags.mispred ? "M" : " ",
 779                         e->flags.predicted ? "P" : " ",
 780                         e->flags.abort ? "A" : " ",
 781                         e->flags.in_tx ? "T" : " ",
 782                         (unsigned)e->flags.reserved);
 783         }
 784 }
 785
 786 static void regs_dump__printf(u64 mask, u64 *regs)
 787 {
 788         unsigned rid, i = 0;
 789
 790         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 791                 u64 val = regs[i++];
 792
 793                 printf(".... %-5s 0x%" PRIx64 "\n",
 794                        perf_reg_name(rid), val);
 795         }
 796 }
 797
 798 static const char *regs_abi[] = {
 799         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
 800         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 801         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 802 };
 803
 804 static inline const char *regs_dump_abi(struct regs_dump *d)
 805 {
 806         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 807                 return "unknown";
 808
 809         return regs_abi[d->abi];
 810 }
 811
 812 static void regs__printf(const char *type, struct regs_dump *regs)
 813 {
 814         u64 mask = regs->mask;
 815
 816         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 817                type,
 818                mask,
 819                regs_dump_abi(regs));
 820
 821         regs_dump__printf(mask, regs->regs);
 822 }
 823
 824 static void regs_user__printf(struct perf_sample *sample)
 825 {
 826         struct regs_dump *user_regs = &sample->user_regs;
 827
 828         if (user_regs->regs)
 829                 regs__printf("user", user_regs);
 830 }
 831
 832 static void regs_intr__printf(struct perf_sample *sample)
 833 {
 834         struct regs_dump *intr_regs = &sample->intr_regs;
 835
 836         if (intr_regs->regs)
 837                 regs__printf("intr", intr_regs);
 838 }
 839
 840 static void stack_user__printf(struct stack_dump *dump)
 841 {
 842         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 843                dump->size, dump->offset);
 844 }
 845
 846 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
 847                                        union perf_event *event,
 848                                        struct perf_sample *sample)
 849 {
 850         u64 sample_type = __perf_evlist__combined_sample_type(evlist);
 851
 852         if (event->header.type != PERF_RECORD_SAMPLE &&
 853             !perf_evlist__sample_id_all(evlist)) {
 854                 fputs("-1 -1 ", stdout);
 855                 return;
 856         }
 857
 858         if ((sample_type & PERF_SAMPLE_CPU))
 859                 printf("%u ", sample->cpu);
 860
 861         if (sample_type & PERF_SAMPLE_TIME)
 862                 printf("%" PRIu64 " ", sample->time);
 863 }
 864
 865 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
 866 {
 867         printf("... sample_read:\n");
 868
 869         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
 870                 printf("...... time enabled %016" PRIx64 "\n",
 871                        sample->read.time_enabled);
 872
 873         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
 874                 printf("...... time running %016" PRIx64 "\n",
 875                        sample->read.time_running);
 876
 877         if (read_format & PERF_FORMAT_GROUP) {
 878                 u64 i;
 879
 880                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
 881
 882                 for (i = 0; i < sample->read.group.nr; i++) {
 883                         struct sample_read_value *value;
 884
 885                         value = &sample->read.group.values[i];
 886                         printf("..... id %016" PRIx64
 887                                ", value %016" PRIx64 "\n",
 888                                value->id, value->value);
 889                 }
 890         } else
 891                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
 892                         sample->read.one.id, sample->read.one.value);
 893 }
 894
 895 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
 896                        u64 file_offset, struct perf_sample *sample)
 897 {
 898         if (!dump_trace)
 899                 return;
 900
 901         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 902                file_offset, event->header.size, event->header.type);
 903
 904         trace_event(event);
 905
 906         if (sample)
 907                 perf_evlist__print_tstamp(evlist, event, sample);
 908
 909         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 910                event->header.size, perf_event__name(event->header.type));
 911 }
 912
 913 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 914                         struct perf_sample *sample)
 915 {
 916         u64 sample_type;
 917
 918         if (!dump_trace)
 919                 return;
 920
 921         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 922                event->header.misc, sample->pid, sample->tid, sample->ip,
 923                sample->period, sample->addr);
 924
 925         sample_type = evsel->attr.sample_type;
 926
 927         if (sample_type & PERF_SAMPLE_CALLCHAIN)
 928                 callchain__printf(evsel, sample);
 929
 930         if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
 931                 branch_stack__printf(sample);
 932
 933         if (sample_type & PERF_SAMPLE_REGS_USER)
 934                 regs_user__printf(sample);
 935
 936         if (sample_type & PERF_SAMPLE_REGS_INTR)
 937                 regs_intr__printf(sample);
 938
 939         if (sample_type & PERF_SAMPLE_STACK_USER)
 940                 stack_user__printf(&sample->user_stack);
 941
 942         if (sample_type & PERF_SAMPLE_WEIGHT)
 943                 printf("... weight: %" PRIu64 "\n", sample->weight);
 944
 945         if (sample_type & PERF_SAMPLE_DATA_SRC)
 946                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
 947
 948         if (sample_type & PERF_SAMPLE_TRANSACTION)
 949                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
 950
 951         if (sample_type & PERF_SAMPLE_READ)
 952                 sample_read__printf(sample, evsel->attr.read_format);
 953 }
 954
 955 static struct machine *machines__find_for_cpumode(struct machines *machines,
 956                                                union perf_event *event,
 957                                                struct perf_sample *sample)
 958 {
 959         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 960         struct machine *machine;
 961
 962         if (perf_guest &&
 963             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
 964              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
 965                 u32 pid;
 966
 967                 if (event->header.type == PERF_RECORD_MMAP
 968                     || event->header.type == PERF_RECORD_MMAP2)
 969                         pid = event->mmap.pid;
 970                 else
 971                         pid = sample->pid;
 972
 973                 machine = machines__find(machines, pid);
 974                 if (!machine)
 975                         machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID);
 976                 return machine;
 977         }
 978
 979         return &machines->host;
 980 }
 981
 982 static int deliver_sample_value(struct perf_evlist *evlist,
 983                                 struct perf_tool *tool,
 984                                 union perf_event *event,
 985                                 struct perf_sample *sample,
 986                                 struct sample_read_value *v,
 987                                 struct machine *machine)
 988 {
 989         struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
 990
 991         if (sid) {
 992                 sample->id     = v->id;
 993                 sample->period = v->value - sid->period;
 994                 sid->period    = v->value;
 995         }
 996
 997         if (!sid || sid->evsel == NULL) {
 998                 ++evlist->stats.nr_unknown_id;
 999                 return 0;
1000         }
1001
1002         return tool->sample(tool, event, sample, sid->evsel, machine);
1003 }
1004
1005 static int deliver_sample_group(struct perf_evlist *evlist,
1006                                 struct perf_tool *tool,
1007                                 union  perf_event *event,
1008                                 struct perf_sample *sample,
1009                                 struct machine *machine)
1010 {
1011         int ret = -EINVAL;
1012         u64 i;
1013
1014         for (i = 0; i < sample->read.group.nr; i++) {
1015                 ret = deliver_sample_value(evlist, tool, event, sample,
1016                                            &sample->read.group.values[i],
1017                                            machine);
1018                 if (ret)
1019                         break;
1020         }
1021
1022         return ret;
1023 }
1024
1025 static int
1026  perf_evlist__deliver_sample(struct perf_evlist *evlist,
1027                              struct perf_tool *tool,
1028                              union  perf_event *event,
1029                              struct perf_sample *sample,
1030                              struct perf_evsel *evsel,
1031                              struct machine *machine)
1032 {
1033         /* We know evsel != NULL. */
1034         u64 sample_type = evsel->attr.sample_type;
1035         u64 read_format = evsel->attr.read_format;
1036
1037         /* Standard sample delievery. */
1038         if (!(sample_type & PERF_SAMPLE_READ))
1039                 return tool->sample(tool, event, sample, evsel, machine);
1040
1041         /* For PERF_SAMPLE_READ we have either single or group mode. */
1042         if (read_format & PERF_FORMAT_GROUP)
1043                 return deliver_sample_group(evlist, tool, event, sample,
1044                                             machine);
1045         else
1046                 return deliver_sample_value(evlist, tool, event, sample,
1047                                             &sample->read.one, machine);
1048 }
1049
1050 static int machines__deliver_event(struct machines *machines,
1051                                    struct perf_evlist *evlist,
1052                                    union perf_event *event,
1053                                    struct perf_sample *sample,
1054                                    struct perf_tool *tool, u64 file_offset)
1055 {
1056         struct perf_evsel *evsel;
1057         struct machine *machine;
1058
1059         dump_event(evlist, event, file_offset, sample);
1060
1061         evsel = perf_evlist__id2evsel(evlist, sample->id);
1062
1063         machine = machines__find_for_cpumode(machines, event, sample);
1064
1065         switch (event->header.type) {
1066         case PERF_RECORD_SAMPLE:
1067                 if (evsel == NULL) {
1068                         ++evlist->stats.nr_unknown_id;
1069                         return 0;
1070                 }
1071                 dump_sample(evsel, event, sample);
1072                 if (machine == NULL) {
1073                         ++evlist->stats.nr_unprocessable_samples;
1074                         return 0;
1075                 }
1076                 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1077         case PERF_RECORD_MMAP:
1078                 return tool->mmap(tool, event, sample, machine);
1079         case PERF_RECORD_MMAP2:
1080                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1081                         ++evlist->stats.nr_proc_map_timeout;
1082                 return tool->mmap2(tool, event, sample, machine);
1083         case PERF_RECORD_COMM:
1084                 return tool->comm(tool, event, sample, machine);
1085         case PERF_RECORD_FORK:
1086                 return tool->fork(tool, event, sample, machine);
1087         case PERF_RECORD_EXIT:
1088                 return tool->exit(tool, event, sample, machine);
1089         case PERF_RECORD_LOST:
1090                 if (tool->lost == perf_event__process_lost)
1091                         evlist->stats.total_lost += event->lost.lost;
1092                 return tool->lost(tool, event, sample, machine);
1093         case PERF_RECORD_LOST_SAMPLES:
1094                 if (tool->lost_samples == perf_event__process_lost_samples)
1095                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1096                 return tool->lost_samples(tool, event, sample, machine);
1097         case PERF_RECORD_READ:
1098                 return tool->read(tool, event, sample, evsel, machine);
1099         case PERF_RECORD_THROTTLE:
1100                 return tool->throttle(tool, event, sample, machine);
1101         case PERF_RECORD_UNTHROTTLE:
1102                 return tool->unthrottle(tool, event, sample, machine);
1103         case PERF_RECORD_AUX:
1104                 if (tool->aux == perf_event__process_aux &&
1105                     (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
1106                         evlist->stats.total_aux_lost += 1;
1107                 return tool->aux(tool, event, sample, machine);
1108         case PERF_RECORD_ITRACE_START:
1109                 return tool->itrace_start(tool, event, sample, machine);
1110         case PERF_RECORD_SWITCH:
1111         case PERF_RECORD_SWITCH_CPU_WIDE:
1112                 return tool->context_switch(tool, event, sample, machine);
1113         default:
1114                 ++evlist->stats.nr_unknown_events;
1115                 return -1;
1116         }
1117 }
1118
1119 static int perf_session__deliver_event(struct perf_session *session,
1120                                        union perf_event *event,
1121                                        struct perf_sample *sample,
1122                                        struct perf_tool *tool,
1123                                        u64 file_offset)
1124 {
1125         int ret;
1126
1127         ret = auxtrace__process_event(session, event, sample, tool);
1128         if (ret < 0)
1129                 return ret;
1130         if (ret > 0)
1131                 return 0;
1132
1133         return machines__deliver_event(&session->machines, session->evlist,
1134                                        event, sample, tool, file_offset);
1135 }
1136
1137 static s64 perf_session__process_user_event(struct perf_session *session,
1138                                             union perf_event *event,
1139                                             u64 file_offset)
1140 {
1141         struct ordered_events *oe = &session->ordered_events;
1142         struct perf_tool *tool = session->tool;
1143         int fd = perf_data_file__fd(session->file);
1144         int err;
1145
1146         dump_event(session->evlist, event, file_offset, NULL);
1147
1148         /* These events are processed right away */
1149         switch (event->header.type) {
1150         case PERF_RECORD_HEADER_ATTR:
1151                 err = tool->attr(tool, event, &session->evlist);
1152                 if (err == 0) {
1153                         perf_session__set_id_hdr_size(session);
1154                         perf_session__set_comm_exec(session);
1155                 }
1156                 return err;
1157         case PERF_RECORD_HEADER_EVENT_TYPE:
1158                 /*
1159                  * Depreceated, but we need to handle it for sake
1160                  * of old data files create in pipe mode.
1161                  */
1162                 return 0;
1163         case PERF_RECORD_HEADER_TRACING_DATA:
1164                 /* setup for reading amidst mmap */
1165                 lseek(fd, file_offset, SEEK_SET);
1166                 return tool->tracing_data(tool, event, session);
1167         case PERF_RECORD_HEADER_BUILD_ID:
1168                 return tool->build_id(tool, event, session);
1169         case PERF_RECORD_FINISHED_ROUND:
1170                 return tool->finished_round(tool, event, oe);
1171         case PERF_RECORD_ID_INDEX:
1172                 return tool->id_index(tool, event, session);
1173         case PERF_RECORD_AUXTRACE_INFO:
1174                 return tool->auxtrace_info(tool, event, session);
1175         case PERF_RECORD_AUXTRACE:
1176                 /* setup for reading amidst mmap */
1177                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1178                 return tool->auxtrace(tool, event, session);
1179         case PERF_RECORD_AUXTRACE_ERROR:
1180                 perf_session__auxtrace_error_inc(session, event);
1181                 return tool->auxtrace_error(tool, event, session);
1182         default:
1183                 return -EINVAL;
1184         }
1185 }
1186
1187 int perf_session__deliver_synth_event(struct perf_session *session,
1188                                       union perf_event *event,
1189                                       struct perf_sample *sample)
1190 {
1191         struct perf_evlist *evlist = session->evlist;
1192         struct perf_tool *tool = session->tool;
1193
1194         events_stats__inc(&evlist->stats, event->header.type);
1195
1196         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1197                 return perf_session__process_user_event(session, event, 0);
1198
1199         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1200 }
1201
1202 static void event_swap(union perf_event *event, bool sample_id_all)
1203 {
1204         perf_event__swap_op swap;
1205
1206         swap = perf_event__swap_ops[event->header.type];
1207         if (swap)
1208                 swap(event, sample_id_all);
1209 }
1210
1211 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1212                              void *buf, size_t buf_sz,
1213                              union perf_event **event_ptr,
1214                              struct perf_sample *sample)
1215 {
1216         union perf_event *event;
1217         size_t hdr_sz, rest;
1218         int fd;
1219
1220         if (session->one_mmap && !session->header.needs_swap) {
1221                 event = file_offset - session->one_mmap_offset +
1222                         session->one_mmap_addr;
1223                 goto out_parse_sample;
1224         }
1225
1226         if (perf_data_file__is_pipe(session->file))
1227                 return -1;
1228
1229         fd = perf_data_file__fd(session->file);
1230         hdr_sz = sizeof(struct perf_event_header);
1231
1232         if (buf_sz < hdr_sz)
1233                 return -1;
1234
1235         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1236             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1237                 return -1;
1238
1239         event = (union perf_event *)buf;
1240
1241         if (session->header.needs_swap)
1242                 perf_event_header__bswap(&event->header);
1243
1244         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1245                 return -1;
1246
1247         rest = event->header.size - hdr_sz;
1248
1249         if (readn(fd, buf, rest) != (ssize_t)rest)
1250                 return -1;
1251
1252         if (session->header.needs_swap)
1253                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1254
1255 out_parse_sample:
1256
1257         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1258             perf_evlist__parse_sample(session->evlist, event, sample))
1259                 return -1;
1260
1261         *event_ptr = event;
1262
1263         return 0;
1264 }
1265
1266 static s64 perf_session__process_event(struct perf_session *session,
1267                                        union perf_event *event, u64 file_offset)
1268 {
1269         struct perf_evlist *evlist = session->evlist;
1270         struct perf_tool *tool = session->tool;
1271         struct perf_sample sample;
1272         int ret;
1273
1274         if (session->header.needs_swap)
1275                 event_swap(event, perf_evlist__sample_id_all(evlist));
1276
1277         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1278                 return -EINVAL;
1279
1280         events_stats__inc(&evlist->stats, event->header.type);
1281
1282         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1283                 return perf_session__process_user_event(session, event, file_offset);
1284
1285         /*
1286          * For all kernel events we get the sample data
1287          */
1288         ret = perf_evlist__parse_sample(evlist, event, &sample);
1289         if (ret)
1290                 return ret;
1291
1292         if (tool->ordered_events) {
1293                 ret = perf_session__queue_event(session, event, &sample, file_offset);
1294                 if (ret != -ETIME)
1295                         return ret;
1296         }
1297
1298         return perf_session__deliver_event(session, event, &sample, tool,
1299                                            file_offset);
1300 }
1301
1302 void perf_event_header__bswap(struct perf_event_header *hdr)
1303 {
1304         hdr->type = bswap_32(hdr->type);
1305         hdr->misc = bswap_16(hdr->misc);
1306         hdr->size = bswap_16(hdr->size);
1307 }
1308
1309 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1310 {
1311         return machine__findnew_thread(&session->machines.host, -1, pid);
1312 }
1313
1314 int perf_session__register_idle_thread(struct perf_session *session)
1315 {
1316         struct thread *thread;
1317         int err = 0;
1318
1319         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1320         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1321                 pr_err("problem inserting idle task.\n");
1322                 err = -1;
1323         }
1324
1325         /* machine__findnew_thread() got the thread, so put it */
1326         thread__put(thread);
1327         return err;
1328 }
1329
1330 static void perf_session__warn_about_errors(const struct perf_session *session)
1331 {
1332         const struct events_stats *stats = &session->evlist->stats;
1333         const struct ordered_events *oe = &session->ordered_events;
1334
1335         if (session->tool->lost == perf_event__process_lost &&
1336             stats->nr_events[PERF_RECORD_LOST] != 0) {
1337                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1338                             "Check IO/CPU overload!\n\n",
1339                             stats->nr_events[0],
1340                             stats->nr_events[PERF_RECORD_LOST]);
1341         }
1342
1343         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1344                 double drop_rate;
1345
1346                 drop_rate = (double)stats->total_lost_samples /
1347                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1348                 if (drop_rate > 0.05) {
1349                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1350                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1351                                     drop_rate * 100.0);
1352                 }
1353         }
1354
1355         if (session->tool->aux == perf_event__process_aux &&
1356             stats->total_aux_lost != 0) {
1357                 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1358                             stats->total_aux_lost,
1359                             stats->nr_events[PERF_RECORD_AUX]);
1360         }
1361
1362         if (stats->nr_unknown_events != 0) {
1363                 ui__warning("Found %u unknown events!\n\n"
1364                             "Is this an older tool processing a perf.data "
1365                             "file generated by a more recent tool?\n\n"
1366                             "If that is not the case, consider "
1367                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1368                             stats->nr_unknown_events);
1369         }
1370
1371         if (stats->nr_unknown_id != 0) {
1372                 ui__warning("%u samples with id not present in the header\n",
1373                             stats->nr_unknown_id);
1374         }
1375
1376         if (stats->nr_invalid_chains != 0) {
1377                 ui__warning("Found invalid callchains!\n\n"
1378                             "%u out of %u events were discarded for this reason.\n\n"
1379                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1380                             stats->nr_invalid_chains,
1381                             stats->nr_events[PERF_RECORD_SAMPLE]);
1382         }
1383
1384         if (stats->nr_unprocessable_samples != 0) {
1385                 ui__warning("%u unprocessable samples recorded.\n"
1386                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1387                             stats->nr_unprocessable_samples);
1388         }
1389
1390         if (oe->nr_unordered_events != 0)
1391                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1392
1393         events_stats__auxtrace_error_warn(stats);
1394
1395         if (stats->nr_proc_map_timeout != 0) {
1396                 ui__warning("%d map information files for pre-existing threads were\n"
1397                             "not processed, if there are samples for addresses they\n"
1398                             "will not be resolved, you may find out which are these\n"
1399                             "threads by running with -v and redirecting the output\n"
1400                             "to a file.\n"
1401                             "The time limit to process proc map is too short?\n"
1402                             "Increase it by --proc-map-timeout\n",
1403                             stats->nr_proc_map_timeout);
1404         }
1405 }
1406
1407 static int perf_session__flush_thread_stack(struct thread *thread,
1408                                             void *p __maybe_unused)
1409 {
1410         return thread_stack__flush(thread);
1411 }
1412
1413 static int perf_session__flush_thread_stacks(struct perf_session *session)
1414 {
1415         return machines__for_each_thread(&session->machines,
1416                                          perf_session__flush_thread_stack,
1417                                          NULL);
1418 }
1419
1420 volatile int session_done;
1421
1422 static int __perf_session__process_pipe_events(struct perf_session *session)
1423 {
1424         struct ordered_events *oe = &session->ordered_events;
1425         struct perf_tool *tool = session->tool;
1426         int fd = perf_data_file__fd(session->file);
1427         union perf_event *event;
1428         uint32_t size, cur_size = 0;
1429         void *buf = NULL;
1430         s64 skip = 0;
1431         u64 head;
1432         ssize_t err;
1433         void *p;
1434
1435         perf_tool__fill_defaults(tool);
1436
1437         head = 0;
1438         cur_size = sizeof(union perf_event);
1439
1440         buf = malloc(cur_size);
1441         if (!buf)
1442                 return -errno;
1443 more:
1444         event = buf;
1445         err = readn(fd, event, sizeof(struct perf_event_header));
1446         if (err <= 0) {
1447                 if (err == 0)
1448                         goto done;
1449
1450                 pr_err("failed to read event header\n");
1451                 goto out_err;
1452         }
1453
1454         if (session->header.needs_swap)
1455                 perf_event_header__bswap(&event->header);
1456
1457         size = event->header.size;
1458         if (size < sizeof(struct perf_event_header)) {
1459                 pr_err("bad event header size\n");
1460                 goto out_err;
1461         }
1462
1463         if (size > cur_size) {
1464                 void *new = realloc(buf, size);
1465                 if (!new) {
1466                         pr_err("failed to allocate memory to read event\n");
1467                         goto out_err;
1468                 }
1469                 buf = new;
1470                 cur_size = size;
1471                 event = buf;
1472         }
1473         p = event;
1474         p += sizeof(struct perf_event_header);
1475
1476         if (size - sizeof(struct perf_event_header)) {
1477                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1478                 if (err <= 0) {
1479                         if (err == 0) {
1480                                 pr_err("unexpected end of event stream\n");
1481                                 goto done;
1482                         }
1483
1484                         pr_err("failed to read event data\n");
1485                         goto out_err;
1486                 }
1487         }
1488
1489         if ((skip = perf_session__process_event(session, event, head)) < 0) {
1490                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1491                        head, event->header.size, event->header.type);
1492                 err = -EINVAL;
1493                 goto out_err;
1494         }
1495
1496         head += size;
1497
1498         if (skip > 0)
1499                 head += skip;
1500
1501         if (!session_done())
1502                 goto more;
1503 done:
1504         /* do the final flush for ordered samples */
1505         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1506         if (err)
1507                 goto out_err;
1508         err = auxtrace__flush_events(session, tool);
1509         if (err)
1510                 goto out_err;
1511         err = perf_session__flush_thread_stacks(session);
1512 out_err:
1513         free(buf);
1514         perf_session__warn_about_errors(session);
1515         ordered_events__free(&session->ordered_events);
1516         auxtrace__free_events(session);
1517         return err;
1518 }
1519
1520 static union perf_event *
1521 fetch_mmaped_event(struct perf_session *session,
1522                    u64 head, size_t mmap_size, char *buf)
1523 {
1524         union perf_event *event;
1525
1526         /*
1527          * Ensure we have enough space remaining to read
1528          * the size of the event in the headers.
1529          */
1530         if (head + sizeof(event->header) > mmap_size)
1531                 return NULL;
1532
1533         event = (union perf_event *)(buf + head);
1534
1535         if (session->header.needs_swap)
1536                 perf_event_header__bswap(&event->header);
1537
1538         if (head + event->header.size > mmap_size) {
1539                 /* We're not fetching the event so swap back again */
1540                 if (session->header.needs_swap)
1541                         perf_event_header__bswap(&event->header);
1542                 return NULL;
1543         }
1544
1545         return event;
1546 }
1547
1548 /*
1549  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1550  * slices. On 32bit we use 32MB.
1551  */
1552 #if BITS_PER_LONG == 64
1553 #define MMAP_SIZE ULLONG_MAX
1554 #define NUM_MMAPS 1
1555 #else
1556 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1557 #define NUM_MMAPS 128
1558 #endif
1559
1560 static int __perf_session__process_events(struct perf_session *session,
1561                                           u64 data_offset, u64 data_size,
1562                                           u64 file_size)
1563 {
1564         struct ordered_events *oe = &session->ordered_events;
1565         struct perf_tool *tool = session->tool;
1566         int fd = perf_data_file__fd(session->file);
1567         u64 head, page_offset, file_offset, file_pos, size;
1568         int err, mmap_prot, mmap_flags, map_idx = 0;
1569         size_t  mmap_size;
1570         char *buf, *mmaps[NUM_MMAPS];
1571         union perf_event *event;
1572         struct ui_progress prog;
1573         s64 skip;
1574
1575         perf_tool__fill_defaults(tool);
1576
1577         page_offset = page_size * (data_offset / page_size);
1578         file_offset = page_offset;
1579         head = data_offset - page_offset;
1580
1581         if (data_size == 0)
1582                 goto out;
1583
1584         if (data_offset + data_size < file_size)
1585                 file_size = data_offset + data_size;
1586
1587         ui_progress__init(&prog, file_size, "Processing events...");
1588
1589         mmap_size = MMAP_SIZE;
1590         if (mmap_size > file_size) {
1591                 mmap_size = file_size;
1592                 session->one_mmap = true;
1593         }
1594
1595         memset(mmaps, 0, sizeof(mmaps));
1596
1597         mmap_prot  = PROT_READ;
1598         mmap_flags = MAP_SHARED;
1599
1600         if (session->header.needs_swap) {
1601                 mmap_prot  |= PROT_WRITE;
1602                 mmap_flags = MAP_PRIVATE;
1603         }
1604 remap:
1605         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1606                    file_offset);
1607         if (buf == MAP_FAILED) {
1608                 pr_err("failed to mmap file\n");
1609                 err = -errno;
1610                 goto out_err;
1611         }
1612         mmaps[map_idx] = buf;
1613         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1614         file_pos = file_offset + head;
1615         if (session->one_mmap) {
1616                 session->one_mmap_addr = buf;
1617                 session->one_mmap_offset = file_offset;
1618         }
1619
1620 more:
1621         event = fetch_mmaped_event(session, head, mmap_size, buf);
1622         if (!event) {
1623                 if (mmaps[map_idx]) {
1624                         munmap(mmaps[map_idx], mmap_size);
1625                         mmaps[map_idx] = NULL;
1626                 }
1627
1628                 page_offset = page_size * (head / page_size);
1629                 file_offset += page_offset;
1630                 head -= page_offset;
1631                 goto remap;
1632         }
1633
1634         size = event->header.size;
1635
1636         if (size < sizeof(struct perf_event_header) ||
1637             (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1638                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1639                        file_offset + head, event->header.size,
1640                        event->header.type);
1641                 err = -EINVAL;
1642                 goto out_err;
1643         }
1644
1645         if (skip)
1646                 size += skip;
1647
1648         head += size;
1649         file_pos += size;
1650
1651         ui_progress__update(&prog, size);
1652
1653         if (session_done())
1654                 goto out;
1655
1656         if (file_pos < file_size)
1657                 goto more;
1658
1659 out:
1660         /* do the final flush for ordered samples */
1661         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1662         if (err)
1663                 goto out_err;
1664         err = auxtrace__flush_events(session, tool);
1665         if (err)
1666                 goto out_err;
1667         err = perf_session__flush_thread_stacks(session);
1668 out_err:
1669         ui_progress__finish();
1670         perf_session__warn_about_errors(session);
1671         ordered_events__free(&session->ordered_events);
1672         auxtrace__free_events(session);
1673         session->one_mmap = false;
1674         return err;
1675 }
1676
1677 int perf_session__process_events(struct perf_session *session)
1678 {
1679         u64 size = perf_data_file__size(session->file);
1680         int err;
1681
1682         if (perf_session__register_idle_thread(session) < 0)
1683                 return -ENOMEM;
1684
1685         if (!perf_data_file__is_pipe(session->file))
1686                 err = __perf_session__process_events(session,
1687                                                      session->header.data_offset,
1688                                                      session->header.data_size, size);
1689         else
1690                 err = __perf_session__process_pipe_events(session);
1691
1692         return err;
1693 }
1694
1695 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1696 {
1697         struct perf_evsel *evsel;
1698
1699         evlist__for_each(session->evlist, evsel) {
1700                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1701                         return true;
1702         }
1703
1704         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1705         return false;
1706 }
1707
1708 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1709                                      const char *symbol_name, u64 addr)
1710 {
1711         char *bracket;
1712         enum map_type i;
1713         struct ref_reloc_sym *ref;
1714
1715         ref = zalloc(sizeof(struct ref_reloc_sym));
1716         if (ref == NULL)
1717                 return -ENOMEM;
1718
1719         ref->name = strdup(symbol_name);
1720         if (ref->name == NULL) {
1721                 free(ref);
1722                 return -ENOMEM;
1723         }
1724
1725         bracket = strchr(ref->name, ']');
1726         if (bracket)
1727                 *bracket = '\0';
1728
1729         ref->addr = addr;
1730
1731         for (i = 0; i < MAP__NR_TYPES; ++i) {
1732                 struct kmap *kmap = map__kmap(maps[i]);
1733
1734                 if (!kmap)
1735                         continue;
1736                 kmap->ref_reloc_sym = ref;
1737         }
1738
1739         return 0;
1740 }
1741
1742 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1743 {
1744         return machines__fprintf_dsos(&session->machines, fp);
1745 }
1746
1747 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1748                                           bool (skip)(struct dso *dso, int parm), int parm)
1749 {
1750         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1751 }
1752
1753 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1754 {
1755         size_t ret;
1756         const char *msg = "";
1757
1758         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1759                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1760
1761         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1762
1763         ret += events_stats__fprintf(&session->evlist->stats, fp);
1764         return ret;
1765 }
1766
1767 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1768 {
1769         /*
1770          * FIXME: Here we have to actually print all the machines in this
1771          * session, not just the host...
1772          */
1773         return machine__fprintf(&session->machines.host, fp);
1774 }
1775
1776 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1777                                               unsigned int type)
1778 {
1779         struct perf_evsel *pos;
1780
1781         evlist__for_each(session->evlist, pos) {
1782                 if (pos->attr.type == type)
1783                         return pos;
1784         }
1785         return NULL;
1786 }
1787
1788 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1789                           struct addr_location *al,
1790                           unsigned int print_opts, unsigned int stack_depth)
1791 {
1792         struct callchain_cursor_node *node;
1793         int print_ip = print_opts & PRINT_IP_OPT_IP;
1794         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1795         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1796         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1797         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1798         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1799         char s = print_oneline ? ' ' : '\t';
1800
1801         if (symbol_conf.use_callchain && sample->callchain) {
1802                 struct addr_location node_al;
1803
1804                 if (thread__resolve_callchain(al->thread, evsel,
1805                                               sample, NULL, NULL,
1806                                               stack_depth) != 0) {
1807                         if (verbose)
1808                                 error("Failed to resolve callchain. Skipping\n");
1809                         return;
1810                 }
1811                 callchain_cursor_commit(&callchain_cursor);
1812
1813                 if (print_symoffset)
1814                         node_al = *al;
1815
1816                 while (stack_depth) {
1817                         u64 addr = 0;
1818
1819                         node = callchain_cursor_current(&callchain_cursor);
1820                         if (!node)
1821                                 break;
1822
1823                         if (node->sym && node->sym->ignore)
1824                                 goto next;
1825
1826                         if (print_ip)
1827                                 printf("%c%16" PRIx64, s, node->ip);
1828
1829                         if (node->map)
1830                                 addr = node->map->map_ip(node->map, node->ip);
1831
1832                         if (print_sym) {
1833                                 printf(" ");
1834                                 if (print_symoffset) {
1835                                         node_al.addr = addr;
1836                                         node_al.map  = node->map;
1837                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1838                                 } else
1839                                         symbol__fprintf_symname(node->sym, stdout);
1840                         }
1841
1842                         if (print_dso) {
1843                                 printf(" (");
1844                                 map__fprintf_dsoname(node->map, stdout);
1845                                 printf(")");
1846                         }
1847
1848                         if (print_srcline)
1849                                 map__fprintf_srcline(node->map, addr, "\n  ",
1850                                                      stdout);
1851
1852                         if (!print_oneline)
1853                                 printf("\n");
1854
1855                         stack_depth--;
1856 next:
1857                         callchain_cursor_advance(&callchain_cursor);
1858                 }
1859
1860         } else {
1861                 if (al->sym && al->sym->ignore)
1862                         return;
1863
1864                 if (print_ip)
1865                         printf("%16" PRIx64, sample->ip);
1866
1867                 if (print_sym) {
1868                         printf(" ");
1869                         if (print_symoffset)
1870                                 symbol__fprintf_symname_offs(al->sym, al,
1871                                                              stdout);
1872                         else
1873                                 symbol__fprintf_symname(al->sym, stdout);
1874                 }
1875
1876                 if (print_dso) {
1877                         printf(" (");
1878                         map__fprintf_dsoname(al->map, stdout);
1879                         printf(")");
1880                 }
1881
1882                 if (print_srcline)
1883                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
1884         }
1885 }
1886
1887 int perf_session__cpu_bitmap(struct perf_session *session,
1888                              const char *cpu_list, unsigned long *cpu_bitmap)
1889 {
1890         int i, err = -1;
1891         struct cpu_map *map;
1892
1893         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1894                 struct perf_evsel *evsel;
1895
1896                 evsel = perf_session__find_first_evtype(session, i);
1897                 if (!evsel)
1898                         continue;
1899
1900                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1901                         pr_err("File does not contain CPU events. "
1902                                "Remove -c option to proceed.\n");
1903                         return -1;
1904                 }
1905         }
1906
1907         map = cpu_map__new(cpu_list);
1908         if (map == NULL) {
1909                 pr_err("Invalid cpu_list\n");
1910                 return -1;
1911         }
1912
1913         for (i = 0; i < map->nr; i++) {
1914                 int cpu = map->map[i];
1915
1916                 if (cpu >= MAX_NR_CPUS) {
1917                         pr_err("Requested CPU %d too large. "
1918                                "Consider raising MAX_NR_CPUS\n", cpu);
1919                         goto out_delete_map;
1920                 }
1921
1922                 set_bit(cpu, cpu_bitmap);
1923         }
1924
1925         err = 0;
1926
1927 out_delete_map:
1928         cpu_map__put(map);
1929         return err;
1930 }
1931
1932 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1933                                 bool full)
1934 {
1935         struct stat st;
1936         int fd, ret;
1937
1938         if (session == NULL || fp == NULL)
1939                 return;
1940
1941         fd = perf_data_file__fd(session->file);
1942
1943         ret = fstat(fd, &st);
1944         if (ret == -1)
1945                 return;
1946
1947         fprintf(fp, "# ========\n");
1948         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1949         perf_header__fprintf_info(session, fp, full);
1950         fprintf(fp, "# ========\n#\n");
1951 }
1952
1953
1954 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1955                                              const struct perf_evsel_str_handler *assocs,
1956                                              size_t nr_assocs)
1957 {
1958         struct perf_evsel *evsel;
1959         size_t i;
1960         int err;
1961
1962         for (i = 0; i < nr_assocs; i++) {
1963                 /*
1964                  * Adding a handler for an event not in the session,
1965                  * just ignore it.
1966                  */
1967                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1968                 if (evsel == NULL)
1969                         continue;
1970
1971                 err = -EEXIST;
1972                 if (evsel->handler != NULL)
1973                         goto out;
1974                 evsel->handler = assocs[i].handler;
1975         }
1976
1977         err = 0;
1978 out:
1979         return err;
1980 }
1981
1982 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
1983                                  union perf_event *event,
1984                                  struct perf_session *session)
1985 {
1986         struct perf_evlist *evlist = session->evlist;
1987         struct id_index_event *ie = &event->id_index;
1988         size_t i, nr, max_nr;
1989
1990         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
1991                  sizeof(struct id_index_entry);
1992         nr = ie->nr;
1993         if (nr > max_nr)
1994                 return -EINVAL;
1995
1996         if (dump_trace)
1997                 fprintf(stdout, " nr: %zu\n", nr);
1998
1999         for (i = 0; i < nr; i++) {
2000                 struct id_index_entry *e = &ie->entries[i];
2001                 struct perf_sample_id *sid;
2002
2003                 if (dump_trace) {
2004                         fprintf(stdout, " ... id: %"PRIu64, e->id);
2005                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
2006                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
2007                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
2008                 }
2009
2010                 sid = perf_evlist__id2sid(evlist, e->id);
2011                 if (!sid)
2012                         return -ENOENT;
2013                 sid->idx = e->idx;
2014                 sid->cpu = e->cpu;
2015                 sid->tid = e->tid;
2016         }
2017         return 0;
2018 }
2019
2020 int perf_event__synthesize_id_index(struct perf_tool *tool,
2021                                     perf_event__handler_t process,
2022                                     struct perf_evlist *evlist,
2023                                     struct machine *machine)
2024 {
2025         union perf_event *ev;
2026         struct perf_evsel *evsel;
2027         size_t nr = 0, i = 0, sz, max_nr, n;
2028         int err;
2029
2030         pr_debug2("Synthesizing id index\n");
2031
2032         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2033                  sizeof(struct id_index_entry);
2034
2035         evlist__for_each(evlist, evsel)
2036                 nr += evsel->ids;
2037
2038         n = nr > max_nr ? max_nr : nr;
2039         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2040         ev = zalloc(sz);
2041         if (!ev)
2042                 return -ENOMEM;
2043
2044         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2045         ev->id_index.header.size = sz;
2046         ev->id_index.nr = n;
2047
2048         evlist__for_each(evlist, evsel) {
2049                 u32 j;
2050
2051                 for (j = 0; j < evsel->ids; j++) {
2052                         struct id_index_entry *e;
2053                         struct perf_sample_id *sid;
2054
2055                         if (i >= n) {
2056                                 err = process(tool, ev, NULL, machine);
2057                                 if (err)
2058                                         goto out_err;
2059                                 nr -= n;
2060                                 i = 0;
2061                         }
2062
2063                         e = &ev->id_index.entries[i++];
2064
2065                         e->id = evsel->id[j];
2066
2067                         sid = perf_evlist__id2sid(evlist, e->id);
2068                         if (!sid) {
2069                                 free(ev);
2070                                 return -ENOENT;
2071                         }
2072
2073                         e->idx = sid->idx;
2074                         e->cpu = sid->cpu;
2075                         e->tid = sid->tid;
2076                 }
2077         }
2078
2079         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2080         ev->id_index.header.size = sz;
2081         ev->id_index.nr = nr;
2082
2083         err = process(tool, ev, NULL, machine);
2084 out_err:
2085         free(ev);
2086
2087         return err;
2088 }