tools/perf/util/session.c

   1 #include <linux/kernel.h>
   2 #include <traceevent/event-parse.h>
   3
   4 #include <byteswap.h>
   5 #include <unistd.h>
   6 #include <sys/types.h>
   7 #include <sys/mman.h>
   8
   9 #include "evlist.h"
  10 #include "evsel.h"
  11 #include "session.h"
  12 #include "tool.h"
  13 #include "sort.h"
  14 #include "util.h"
  15 #include "cpumap.h"
  16 #include "perf_regs.h"
  17 #include "asm/bug.h"
  18 #include "auxtrace.h"
  19 #include "thread-stack.h"
  20
  21 static int perf_session__deliver_event(struct perf_session *session,
  22                                        union perf_event *event,
  23                                        struct perf_sample *sample,
  24                                        struct perf_tool *tool,
  25                                        u64 file_offset);
  26
  27 static int perf_session__open(struct perf_session *session)
  28 {
  29         struct perf_data_file *file = session->file;
  30
  31         if (perf_session__read_header(session) < 0) {
  32                 pr_err("incompatible file format (rerun with -v to learn more)");
  33                 return -1;
  34         }
  35
  36         if (perf_data_file__is_pipe(file))
  37                 return 0;
  38
  39         if (!perf_evlist__valid_sample_type(session->evlist)) {
  40                 pr_err("non matching sample_type");
  41                 return -1;
  42         }
  43
  44         if (!perf_evlist__valid_sample_id_all(session->evlist)) {
  45                 pr_err("non matching sample_id_all");
  46                 return -1;
  47         }
  48
  49         if (!perf_evlist__valid_read_format(session->evlist)) {
  50                 pr_err("non matching read_format");
  51                 return -1;
  52         }
  53
  54         return 0;
  55 }
  56
  57 void perf_session__set_id_hdr_size(struct perf_session *session)
  58 {
  59         u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
  60
  61         machines__set_id_hdr_size(&session->machines, id_hdr_size);
  62 }
  63
  64 int perf_session__create_kernel_maps(struct perf_session *session)
  65 {
  66         int ret = machine__create_kernel_maps(&session->machines.host);
  67
  68         if (ret >= 0)
  69                 ret = machines__create_guest_kernel_maps(&session->machines);
  70         return ret;
  71 }
  72
  73 static void perf_session__destroy_kernel_maps(struct perf_session *session)
  74 {
  75         machines__destroy_kernel_maps(&session->machines);
  76 }
  77
  78 static bool perf_session__has_comm_exec(struct perf_session *session)
  79 {
  80         struct perf_evsel *evsel;
  81
  82         evlist__for_each(session->evlist, evsel) {
  83                 if (evsel->attr.comm_exec)
  84                         return true;
  85         }
  86
  87         return false;
  88 }
  89
  90 static void perf_session__set_comm_exec(struct perf_session *session)
  91 {
  92         bool comm_exec = perf_session__has_comm_exec(session);
  93
  94         machines__set_comm_exec(&session->machines, comm_exec);
  95 }
  96
  97 static int ordered_events__deliver_event(struct ordered_events *oe,
  98                                          struct ordered_event *event)
  99 {
 100         struct perf_sample sample;
 101         struct perf_session *session = container_of(oe, struct perf_session,
 102                                                     ordered_events);
 103         int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
 104
 105         if (ret) {
 106                 pr_err("Can't parse sample, err = %d\n", ret);
 107                 return ret;
 108         }
 109
 110         return perf_session__deliver_event(session, event->event, &sample,
 111                                            session->tool, event->file_offset);
 112 }
 113
 114 struct perf_session *perf_session__new(struct perf_data_file *file,
 115                                        bool repipe, struct perf_tool *tool)
 116 {
 117         struct perf_session *session = zalloc(sizeof(*session));
 118
 119         if (!session)
 120                 goto out;
 121
 122         session->repipe = repipe;
 123         session->tool   = tool;
 124         INIT_LIST_HEAD(&session->auxtrace_index);
 125         machines__init(&session->machines);
 126         ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
 127
 128         if (file) {
 129                 if (perf_data_file__open(file))
 130                         goto out_delete;
 131
 132                 session->file = file;
 133
 134                 if (perf_data_file__is_read(file)) {
 135                         if (perf_session__open(session) < 0)
 136                                 goto out_close;
 137
 138                         perf_session__set_id_hdr_size(session);
 139                         perf_session__set_comm_exec(session);
 140                 }
 141         } 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 struct thread *perf_session__register_idle_thread(struct perf_session *session)
1315 {
1316         struct thread *thread;
1317
1318         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1319         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1320                 pr_err("problem inserting idle task.\n");
1321                 thread = NULL;
1322         }
1323
1324         return thread;
1325 }
1326
1327 static void perf_session__warn_about_errors(const struct perf_session *session)
1328 {
1329         const struct events_stats *stats = &session->evlist->stats;
1330         const struct ordered_events *oe = &session->ordered_events;
1331
1332         if (session->tool->lost == perf_event__process_lost &&
1333             stats->nr_events[PERF_RECORD_LOST] != 0) {
1334                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1335                             "Check IO/CPU overload!\n\n",
1336                             stats->nr_events[0],
1337                             stats->nr_events[PERF_RECORD_LOST]);
1338         }
1339
1340         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1341                 double drop_rate;
1342
1343                 drop_rate = (double)stats->total_lost_samples /
1344                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1345                 if (drop_rate > 0.05) {
1346                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1347                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1348                                     drop_rate * 100.0);
1349                 }
1350         }
1351
1352         if (session->tool->aux == perf_event__process_aux &&
1353             stats->total_aux_lost != 0) {
1354                 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1355                             stats->total_aux_lost,
1356                             stats->nr_events[PERF_RECORD_AUX]);
1357         }
1358
1359         if (stats->nr_unknown_events != 0) {
1360                 ui__warning("Found %u unknown events!\n\n"
1361                             "Is this an older tool processing a perf.data "
1362                             "file generated by a more recent tool?\n\n"
1363                             "If that is not the case, consider "
1364                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1365                             stats->nr_unknown_events);
1366         }
1367
1368         if (stats->nr_unknown_id != 0) {
1369                 ui__warning("%u samples with id not present in the header\n",
1370                             stats->nr_unknown_id);
1371         }
1372
1373         if (stats->nr_invalid_chains != 0) {
1374                 ui__warning("Found invalid callchains!\n\n"
1375                             "%u out of %u events were discarded for this reason.\n\n"
1376                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1377                             stats->nr_invalid_chains,
1378                             stats->nr_events[PERF_RECORD_SAMPLE]);
1379         }
1380
1381         if (stats->nr_unprocessable_samples != 0) {
1382                 ui__warning("%u unprocessable samples recorded.\n"
1383                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1384                             stats->nr_unprocessable_samples);
1385         }
1386
1387         if (oe->nr_unordered_events != 0)
1388                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1389
1390         events_stats__auxtrace_error_warn(stats);
1391
1392         if (stats->nr_proc_map_timeout != 0) {
1393                 ui__warning("%d map information files for pre-existing threads were\n"
1394                             "not processed, if there are samples for addresses they\n"
1395                             "will not be resolved, you may find out which are these\n"
1396                             "threads by running with -v and redirecting the output\n"
1397                             "to a file.\n"
1398                             "The time limit to process proc map is too short?\n"
1399                             "Increase it by --proc-map-timeout\n",
1400                             stats->nr_proc_map_timeout);
1401         }
1402 }
1403
1404 static int perf_session__flush_thread_stack(struct thread *thread,
1405                                             void *p __maybe_unused)
1406 {
1407         return thread_stack__flush(thread);
1408 }
1409
1410 static int perf_session__flush_thread_stacks(struct perf_session *session)
1411 {
1412         return machines__for_each_thread(&session->machines,
1413                                          perf_session__flush_thread_stack,
1414                                          NULL);
1415 }
1416
1417 volatile int session_done;
1418
1419 static int __perf_session__process_pipe_events(struct perf_session *session)
1420 {
1421         struct ordered_events *oe = &session->ordered_events;
1422         struct perf_tool *tool = session->tool;
1423         int fd = perf_data_file__fd(session->file);
1424         union perf_event *event;
1425         uint32_t size, cur_size = 0;
1426         void *buf = NULL;
1427         s64 skip = 0;
1428         u64 head;
1429         ssize_t err;
1430         void *p;
1431
1432         perf_tool__fill_defaults(tool);
1433
1434         head = 0;
1435         cur_size = sizeof(union perf_event);
1436
1437         buf = malloc(cur_size);
1438         if (!buf)
1439                 return -errno;
1440 more:
1441         event = buf;
1442         err = readn(fd, event, sizeof(struct perf_event_header));
1443         if (err <= 0) {
1444                 if (err == 0)
1445                         goto done;
1446
1447                 pr_err("failed to read event header\n");
1448                 goto out_err;
1449         }
1450
1451         if (session->header.needs_swap)
1452                 perf_event_header__bswap(&event->header);
1453
1454         size = event->header.size;
1455         if (size < sizeof(struct perf_event_header)) {
1456                 pr_err("bad event header size\n");
1457                 goto out_err;
1458         }
1459
1460         if (size > cur_size) {
1461                 void *new = realloc(buf, size);
1462                 if (!new) {
1463                         pr_err("failed to allocate memory to read event\n");
1464                         goto out_err;
1465                 }
1466                 buf = new;
1467                 cur_size = size;
1468                 event = buf;
1469         }
1470         p = event;
1471         p += sizeof(struct perf_event_header);
1472
1473         if (size - sizeof(struct perf_event_header)) {
1474                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1475                 if (err <= 0) {
1476                         if (err == 0) {
1477                                 pr_err("unexpected end of event stream\n");
1478                                 goto done;
1479                         }
1480
1481                         pr_err("failed to read event data\n");
1482                         goto out_err;
1483                 }
1484         }
1485
1486         if ((skip = perf_session__process_event(session, event, head)) < 0) {
1487                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1488                        head, event->header.size, event->header.type);
1489                 err = -EINVAL;
1490                 goto out_err;
1491         }
1492
1493         head += size;
1494
1495         if (skip > 0)
1496                 head += skip;
1497
1498         if (!session_done())
1499                 goto more;
1500 done:
1501         /* do the final flush for ordered samples */
1502         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1503         if (err)
1504                 goto out_err;
1505         err = auxtrace__flush_events(session, tool);
1506         if (err)
1507                 goto out_err;
1508         err = perf_session__flush_thread_stacks(session);
1509 out_err:
1510         free(buf);
1511         perf_session__warn_about_errors(session);
1512         ordered_events__free(&session->ordered_events);
1513         auxtrace__free_events(session);
1514         return err;
1515 }
1516
1517 static union perf_event *
1518 fetch_mmaped_event(struct perf_session *session,
1519                    u64 head, size_t mmap_size, char *buf)
1520 {
1521         union perf_event *event;
1522
1523         /*
1524          * Ensure we have enough space remaining to read
1525          * the size of the event in the headers.
1526          */
1527         if (head + sizeof(event->header) > mmap_size)
1528                 return NULL;
1529
1530         event = (union perf_event *)(buf + head);
1531
1532         if (session->header.needs_swap)
1533                 perf_event_header__bswap(&event->header);
1534
1535         if (head + event->header.size > mmap_size) {
1536                 /* We're not fetching the event so swap back again */
1537                 if (session->header.needs_swap)
1538                         perf_event_header__bswap(&event->header);
1539                 return NULL;
1540         }
1541
1542         return event;
1543 }
1544
1545 /*
1546  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1547  * slices. On 32bit we use 32MB.
1548  */
1549 #if BITS_PER_LONG == 64
1550 #define MMAP_SIZE ULLONG_MAX
1551 #define NUM_MMAPS 1
1552 #else
1553 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1554 #define NUM_MMAPS 128
1555 #endif
1556
1557 static int __perf_session__process_events(struct perf_session *session,
1558                                           u64 data_offset, u64 data_size,
1559                                           u64 file_size)
1560 {
1561         struct ordered_events *oe = &session->ordered_events;
1562         struct perf_tool *tool = session->tool;
1563         int fd = perf_data_file__fd(session->file);
1564         u64 head, page_offset, file_offset, file_pos, size;
1565         int err, mmap_prot, mmap_flags, map_idx = 0;
1566         size_t  mmap_size;
1567         char *buf, *mmaps[NUM_MMAPS];
1568         union perf_event *event;
1569         struct ui_progress prog;
1570         s64 skip;
1571
1572         perf_tool__fill_defaults(tool);
1573
1574         page_offset = page_size * (data_offset / page_size);
1575         file_offset = page_offset;
1576         head = data_offset - page_offset;
1577
1578         if (data_size == 0)
1579                 goto out;
1580
1581         if (data_offset + data_size < file_size)
1582                 file_size = data_offset + data_size;
1583
1584         ui_progress__init(&prog, file_size, "Processing events...");
1585
1586         mmap_size = MMAP_SIZE;
1587         if (mmap_size > file_size) {
1588                 mmap_size = file_size;
1589                 session->one_mmap = true;
1590         }
1591
1592         memset(mmaps, 0, sizeof(mmaps));
1593
1594         mmap_prot  = PROT_READ;
1595         mmap_flags = MAP_SHARED;
1596
1597         if (session->header.needs_swap) {
1598                 mmap_prot  |= PROT_WRITE;
1599                 mmap_flags = MAP_PRIVATE;
1600         }
1601 remap:
1602         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1603                    file_offset);
1604         if (buf == MAP_FAILED) {
1605                 pr_err("failed to mmap file\n");
1606                 err = -errno;
1607                 goto out_err;
1608         }
1609         mmaps[map_idx] = buf;
1610         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1611         file_pos = file_offset + head;
1612         if (session->one_mmap) {
1613                 session->one_mmap_addr = buf;
1614                 session->one_mmap_offset = file_offset;
1615         }
1616
1617 more:
1618         event = fetch_mmaped_event(session, head, mmap_size, buf);
1619         if (!event) {
1620                 if (mmaps[map_idx]) {
1621                         munmap(mmaps[map_idx], mmap_size);
1622                         mmaps[map_idx] = NULL;
1623                 }
1624
1625                 page_offset = page_size * (head / page_size);
1626                 file_offset += page_offset;
1627                 head -= page_offset;
1628                 goto remap;
1629         }
1630
1631         size = event->header.size;
1632
1633         if (size < sizeof(struct perf_event_header) ||
1634             (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1635                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1636                        file_offset + head, event->header.size,
1637                        event->header.type);
1638                 err = -EINVAL;
1639                 goto out_err;
1640         }
1641
1642         if (skip)
1643                 size += skip;
1644
1645         head += size;
1646         file_pos += size;
1647
1648         ui_progress__update(&prog, size);
1649
1650         if (session_done())
1651                 goto out;
1652
1653         if (file_pos < file_size)
1654                 goto more;
1655
1656 out:
1657         /* do the final flush for ordered samples */
1658         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1659         if (err)
1660                 goto out_err;
1661         err = auxtrace__flush_events(session, tool);
1662         if (err)
1663                 goto out_err;
1664         err = perf_session__flush_thread_stacks(session);
1665 out_err:
1666         ui_progress__finish();
1667         perf_session__warn_about_errors(session);
1668         ordered_events__free(&session->ordered_events);
1669         auxtrace__free_events(session);
1670         session->one_mmap = false;
1671         return err;
1672 }
1673
1674 int perf_session__process_events(struct perf_session *session)
1675 {
1676         u64 size = perf_data_file__size(session->file);
1677         int err;
1678
1679         if (perf_session__register_idle_thread(session) == NULL)
1680                 return -ENOMEM;
1681
1682         if (!perf_data_file__is_pipe(session->file))
1683                 err = __perf_session__process_events(session,
1684                                                      session->header.data_offset,
1685                                                      session->header.data_size, size);
1686         else
1687                 err = __perf_session__process_pipe_events(session);
1688
1689         return err;
1690 }
1691
1692 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1693 {
1694         struct perf_evsel *evsel;
1695
1696         evlist__for_each(session->evlist, evsel) {
1697                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1698                         return true;
1699         }
1700
1701         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1702         return false;
1703 }
1704
1705 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1706                                      const char *symbol_name, u64 addr)
1707 {
1708         char *bracket;
1709         enum map_type i;
1710         struct ref_reloc_sym *ref;
1711
1712         ref = zalloc(sizeof(struct ref_reloc_sym));
1713         if (ref == NULL)
1714                 return -ENOMEM;
1715
1716         ref->name = strdup(symbol_name);
1717         if (ref->name == NULL) {
1718                 free(ref);
1719                 return -ENOMEM;
1720         }
1721
1722         bracket = strchr(ref->name, ']');
1723         if (bracket)
1724                 *bracket = '\0';
1725
1726         ref->addr = addr;
1727
1728         for (i = 0; i < MAP__NR_TYPES; ++i) {
1729                 struct kmap *kmap = map__kmap(maps[i]);
1730
1731                 if (!kmap)
1732                         continue;
1733                 kmap->ref_reloc_sym = ref;
1734         }
1735
1736         return 0;
1737 }
1738
1739 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1740 {
1741         return machines__fprintf_dsos(&session->machines, fp);
1742 }
1743
1744 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1745                                           bool (skip)(struct dso *dso, int parm), int parm)
1746 {
1747         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1748 }
1749
1750 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1751 {
1752         size_t ret;
1753         const char *msg = "";
1754
1755         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1756                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1757
1758         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1759
1760         ret += events_stats__fprintf(&session->evlist->stats, fp);
1761         return ret;
1762 }
1763
1764 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1765 {
1766         /*
1767          * FIXME: Here we have to actually print all the machines in this
1768          * session, not just the host...
1769          */
1770         return machine__fprintf(&session->machines.host, fp);
1771 }
1772
1773 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1774                                               unsigned int type)
1775 {
1776         struct perf_evsel *pos;
1777
1778         evlist__for_each(session->evlist, pos) {
1779                 if (pos->attr.type == type)
1780                         return pos;
1781         }
1782         return NULL;
1783 }
1784
1785 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1786                           struct addr_location *al,
1787                           unsigned int print_opts, unsigned int stack_depth)
1788 {
1789         struct callchain_cursor_node *node;
1790         int print_ip = print_opts & PRINT_IP_OPT_IP;
1791         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1792         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1793         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1794         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1795         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1796         char s = print_oneline ? ' ' : '\t';
1797
1798         if (symbol_conf.use_callchain && sample->callchain) {
1799                 struct addr_location node_al;
1800
1801                 if (thread__resolve_callchain(al->thread, evsel,
1802                                               sample, NULL, NULL,
1803                                               stack_depth) != 0) {
1804                         if (verbose)
1805                                 error("Failed to resolve callchain. Skipping\n");
1806                         return;
1807                 }
1808                 callchain_cursor_commit(&callchain_cursor);
1809
1810                 if (print_symoffset)
1811                         node_al = *al;
1812
1813                 while (stack_depth) {
1814                         u64 addr = 0;
1815
1816                         node = callchain_cursor_current(&callchain_cursor);
1817                         if (!node)
1818                                 break;
1819
1820                         if (node->sym && node->sym->ignore)
1821                                 goto next;
1822
1823                         if (print_ip)
1824                                 printf("%c%16" PRIx64, s, node->ip);
1825
1826                         if (node->map)
1827                                 addr = node->map->map_ip(node->map, node->ip);
1828
1829                         if (print_sym) {
1830                                 printf(" ");
1831                                 if (print_symoffset) {
1832                                         node_al.addr = addr;
1833                                         node_al.map  = node->map;
1834                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1835                                 } else
1836                                         symbol__fprintf_symname(node->sym, stdout);
1837                         }
1838
1839                         if (print_dso) {
1840                                 printf(" (");
1841                                 map__fprintf_dsoname(node->map, stdout);
1842                                 printf(")");
1843                         }
1844
1845                         if (print_srcline)
1846                                 map__fprintf_srcline(node->map, addr, "\n  ",
1847                                                      stdout);
1848
1849                         if (!print_oneline)
1850                                 printf("\n");
1851
1852                         stack_depth--;
1853 next:
1854                         callchain_cursor_advance(&callchain_cursor);
1855                 }
1856
1857         } else {
1858                 if (al->sym && al->sym->ignore)
1859                         return;
1860
1861                 if (print_ip)
1862                         printf("%16" PRIx64, sample->ip);
1863
1864                 if (print_sym) {
1865                         printf(" ");
1866                         if (print_symoffset)
1867                                 symbol__fprintf_symname_offs(al->sym, al,
1868                                                              stdout);
1869                         else
1870                                 symbol__fprintf_symname(al->sym, stdout);
1871                 }
1872
1873                 if (print_dso) {
1874                         printf(" (");
1875                         map__fprintf_dsoname(al->map, stdout);
1876                         printf(")");
1877                 }
1878
1879                 if (print_srcline)
1880                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
1881         }
1882 }
1883
1884 int perf_session__cpu_bitmap(struct perf_session *session,
1885                              const char *cpu_list, unsigned long *cpu_bitmap)
1886 {
1887         int i, err = -1;
1888         struct cpu_map *map;
1889
1890         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1891                 struct perf_evsel *evsel;
1892
1893                 evsel = perf_session__find_first_evtype(session, i);
1894                 if (!evsel)
1895                         continue;
1896
1897                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1898                         pr_err("File does not contain CPU events. "
1899                                "Remove -c option to proceed.\n");
1900                         return -1;
1901                 }
1902         }
1903
1904         map = cpu_map__new(cpu_list);
1905         if (map == NULL) {
1906                 pr_err("Invalid cpu_list\n");
1907                 return -1;
1908         }
1909
1910         for (i = 0; i < map->nr; i++) {
1911                 int cpu = map->map[i];
1912
1913                 if (cpu >= MAX_NR_CPUS) {
1914                         pr_err("Requested CPU %d too large. "
1915                                "Consider raising MAX_NR_CPUS\n", cpu);
1916                         goto out_delete_map;
1917                 }
1918
1919                 set_bit(cpu, cpu_bitmap);
1920         }
1921
1922         err = 0;
1923
1924 out_delete_map:
1925         cpu_map__put(map);
1926         return err;
1927 }
1928
1929 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1930                                 bool full)
1931 {
1932         struct stat st;
1933         int fd, ret;
1934
1935         if (session == NULL || fp == NULL)
1936                 return;
1937
1938         fd = perf_data_file__fd(session->file);
1939
1940         ret = fstat(fd, &st);
1941         if (ret == -1)
1942                 return;
1943
1944         fprintf(fp, "# ========\n");
1945         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1946         perf_header__fprintf_info(session, fp, full);
1947         fprintf(fp, "# ========\n#\n");
1948 }
1949
1950
1951 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1952                                              const struct perf_evsel_str_handler *assocs,
1953                                              size_t nr_assocs)
1954 {
1955         struct perf_evsel *evsel;
1956         size_t i;
1957         int err;
1958
1959         for (i = 0; i < nr_assocs; i++) {
1960                 /*
1961                  * Adding a handler for an event not in the session,
1962                  * just ignore it.
1963                  */
1964                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1965                 if (evsel == NULL)
1966                         continue;
1967
1968                 err = -EEXIST;
1969                 if (evsel->handler != NULL)
1970                         goto out;
1971                 evsel->handler = assocs[i].handler;
1972         }
1973
1974         err = 0;
1975 out:
1976         return err;
1977 }
1978
1979 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
1980                                  union perf_event *event,
1981                                  struct perf_session *session)
1982 {
1983         struct perf_evlist *evlist = session->evlist;
1984         struct id_index_event *ie = &event->id_index;
1985         size_t i, nr, max_nr;
1986
1987         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
1988                  sizeof(struct id_index_entry);
1989         nr = ie->nr;
1990         if (nr > max_nr)
1991                 return -EINVAL;
1992
1993         if (dump_trace)
1994                 fprintf(stdout, " nr: %zu\n", nr);
1995
1996         for (i = 0; i < nr; i++) {
1997                 struct id_index_entry *e = &ie->entries[i];
1998                 struct perf_sample_id *sid;
1999
2000                 if (dump_trace) {
2001                         fprintf(stdout, " ... id: %"PRIu64, e->id);
2002                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
2003                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
2004                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
2005                 }
2006
2007                 sid = perf_evlist__id2sid(evlist, e->id);
2008                 if (!sid)
2009                         return -ENOENT;
2010                 sid->idx = e->idx;
2011                 sid->cpu = e->cpu;
2012                 sid->tid = e->tid;
2013         }
2014         return 0;
2015 }
2016
2017 int perf_event__synthesize_id_index(struct perf_tool *tool,
2018                                     perf_event__handler_t process,
2019                                     struct perf_evlist *evlist,
2020                                     struct machine *machine)
2021 {
2022         union perf_event *ev;
2023         struct perf_evsel *evsel;
2024         size_t nr = 0, i = 0, sz, max_nr, n;
2025         int err;
2026
2027         pr_debug2("Synthesizing id index\n");
2028
2029         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2030                  sizeof(struct id_index_entry);
2031
2032         evlist__for_each(evlist, evsel)
2033                 nr += evsel->ids;
2034
2035         n = nr > max_nr ? max_nr : nr;
2036         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2037         ev = zalloc(sz);
2038         if (!ev)
2039                 return -ENOMEM;
2040
2041         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2042         ev->id_index.header.size = sz;
2043         ev->id_index.nr = n;
2044
2045         evlist__for_each(evlist, evsel) {
2046                 u32 j;
2047
2048                 for (j = 0; j < evsel->ids; j++) {
2049                         struct id_index_entry *e;
2050                         struct perf_sample_id *sid;
2051
2052                         if (i >= n) {
2053                                 err = process(tool, ev, NULL, machine);
2054                                 if (err)
2055                                         goto out_err;
2056                                 nr -= n;
2057                                 i = 0;
2058                         }
2059
2060                         e = &ev->id_index.entries[i++];
2061
2062                         e->id = evsel->id[j];
2063
2064                         sid = perf_evlist__id2sid(evlist, e->id);
2065                         if (!sid) {
2066                                 free(ev);
2067                                 return -ENOENT;
2068                         }
2069
2070                         e->idx = sid->idx;
2071                         e->cpu = sid->cpu;
2072                         e->tid = sid->tid;
2073                 }
2074         }
2075
2076         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2077         ev->id_index.header.size = sz;
2078         ev->id_index.nr = nr;
2079
2080         err = process(tool, ev, NULL, machine);
2081 out_err:
2082         free(ev);
2083
2084         return err;
2085 }