tools/perf/util/session.c

   1 #include <errno.h>
   2 #include <inttypes.h>
   3 #include <linux/kernel.h>
   4 #include <traceevent/event-parse.h>
   5 #include <api/fs/fs.h>
   6
   7 #include <byteswap.h>
   8 #include <unistd.h>
   9 #include <sys/types.h>
  10 #include <sys/mman.h>
  11
  12 #include "evlist.h"
  13 #include "evsel.h"
  14 #include "memswap.h"
  15 #include "session.h"
  16 #include "tool.h"
  17 #include "sort.h"
  18 #include "util.h"
  19 #include "cpumap.h"
  20 #include "perf_regs.h"
  21 #include "asm/bug.h"
  22 #include "auxtrace.h"
  23 #include "thread.h"
  24 #include "thread-stack.h"
  25 #include "stat.h"
  26
  27 static int perf_session__deliver_event(struct perf_session *session,
  28                                        union perf_event *event,
  29                                        struct perf_sample *sample,
  30                                        struct perf_tool *tool,
  31                                        u64 file_offset);
  32
  33 static int perf_session__open(struct perf_session *session)
  34 {
  35         struct perf_data *data = session->data;
  36
  37         if (perf_session__read_header(session) < 0) {
  38                 pr_err("incompatible file format (rerun with -v to learn more)\n");
  39                 return -1;
  40         }
  41
  42         if (perf_data__is_pipe(data))
  43                 return 0;
  44
  45         if (perf_header__has_feat(&session->header, HEADER_STAT))
  46                 return 0;
  47
  48         if (!perf_evlist__valid_sample_type(session->evlist)) {
  49                 pr_err("non matching sample_type\n");
  50                 return -1;
  51         }
  52
  53         if (!perf_evlist__valid_sample_id_all(session->evlist)) {
  54                 pr_err("non matching sample_id_all\n");
  55                 return -1;
  56         }
  57
  58         if (!perf_evlist__valid_read_format(session->evlist)) {
  59                 pr_err("non matching read_format\n");
  60                 return -1;
  61         }
  62
  63         return 0;
  64 }
  65
  66 void perf_session__set_id_hdr_size(struct perf_session *session)
  67 {
  68         u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
  69
  70         machines__set_id_hdr_size(&session->machines, id_hdr_size);
  71 }
  72
  73 int perf_session__create_kernel_maps(struct perf_session *session)
  74 {
  75         int ret = machine__create_kernel_maps(&session->machines.host);
  76
  77         if (ret >= 0)
  78                 ret = machines__create_guest_kernel_maps(&session->machines);
  79         return ret;
  80 }
  81
  82 static void perf_session__destroy_kernel_maps(struct perf_session *session)
  83 {
  84         machines__destroy_kernel_maps(&session->machines);
  85 }
  86
  87 static bool perf_session__has_comm_exec(struct perf_session *session)
  88 {
  89         struct perf_evsel *evsel;
  90
  91         evlist__for_each_entry(session->evlist, evsel) {
  92                 if (evsel->attr.comm_exec)
  93                         return true;
  94         }
  95
  96         return false;
  97 }
  98
  99 static void perf_session__set_comm_exec(struct perf_session *session)
 100 {
 101         bool comm_exec = perf_session__has_comm_exec(session);
 102
 103         machines__set_comm_exec(&session->machines, comm_exec);
 104 }
 105
 106 static int ordered_events__deliver_event(struct ordered_events *oe,
 107                                          struct ordered_event *event)
 108 {
 109         struct perf_sample sample;
 110         struct perf_session *session = container_of(oe, struct perf_session,
 111                                                     ordered_events);
 112         int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
 113
 114         if (ret) {
 115                 pr_err("Can't parse sample, err = %d\n", ret);
 116                 return ret;
 117         }
 118
 119         return perf_session__deliver_event(session, event->event, &sample,
 120                                            session->tool, event->file_offset);
 121 }
 122
 123 struct perf_session *perf_session__new(struct perf_data *data,
 124                                        bool repipe, struct perf_tool *tool)
 125 {
 126         struct perf_session *session = zalloc(sizeof(*session));
 127
 128         if (!session)
 129                 goto out;
 130
 131         session->repipe = repipe;
 132         session->tool   = tool;
 133         INIT_LIST_HEAD(&session->auxtrace_index);
 134         machines__init(&session->machines);
 135         ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
 136
 137         if (data) {
 138                 if (perf_data__open(data))
 139                         goto out_delete;
 140
 141                 session->data = data;
 142
 143                 if (perf_data__is_read(data)) {
 144                         if (perf_session__open(session) < 0)
 145                                 goto out_close;
 146
 147                         /*
 148                          * set session attributes that are present in perf.data
 149                          * but not in pipe-mode.
 150                          */
 151                         if (!data->is_pipe) {
 152                                 perf_session__set_id_hdr_size(session);
 153                                 perf_session__set_comm_exec(session);
 154                         }
 155                 }
 156         } else  {
 157                 session->machines.host.env = &perf_env;
 158         }
 159
 160         if (!data || perf_data__is_write(data)) {
 161                 /*
 162                  * In O_RDONLY mode this will be performed when reading the
 163                  * kernel MMAP event, in perf_event__process_mmap().
 164                  */
 165                 if (perf_session__create_kernel_maps(session) < 0)
 166                         pr_warning("Cannot read kernel map\n");
 167         }
 168
 169         /*
 170          * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
 171          * processed, so perf_evlist__sample_id_all is not meaningful here.
 172          */
 173         if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
 174             tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
 175                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 176                 tool->ordered_events = false;
 177         }
 178
 179         return session;
 180
 181  out_close:
 182         perf_data__close(data);
 183  out_delete:
 184         perf_session__delete(session);
 185  out:
 186         return NULL;
 187 }
 188
 189 static void perf_session__delete_threads(struct perf_session *session)
 190 {
 191         machine__delete_threads(&session->machines.host);
 192 }
 193
 194 void perf_session__delete(struct perf_session *session)
 195 {
 196         if (session == NULL)
 197                 return;
 198         auxtrace__free(session);
 199         auxtrace_index__free(&session->auxtrace_index);
 200         perf_session__destroy_kernel_maps(session);
 201         perf_session__delete_threads(session);
 202         perf_env__exit(&session->header.env);
 203         machines__exit(&session->machines);
 204         if (session->data)
 205                 perf_data__close(session->data);
 206         free(session);
 207 }
 208
 209 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 210                                                  __maybe_unused,
 211                                                  union perf_event *event
 212                                                  __maybe_unused,
 213                                                  struct perf_session *session
 214                                                 __maybe_unused)
 215 {
 216         dump_printf(": unhandled!\n");
 217         return 0;
 218 }
 219
 220 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 221                                          union perf_event *event __maybe_unused,
 222                                          struct perf_evlist **pevlist
 223                                          __maybe_unused)
 224 {
 225         dump_printf(": unhandled!\n");
 226         return 0;
 227 }
 228
 229 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
 230                                                  union perf_event *event __maybe_unused,
 231                                                  struct perf_evlist **pevlist
 232                                                  __maybe_unused)
 233 {
 234         if (dump_trace)
 235                 perf_event__fprintf_event_update(event, stdout);
 236
 237         dump_printf(": unhandled!\n");
 238         return 0;
 239 }
 240
 241 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 242                                      union perf_event *event __maybe_unused,
 243                                      struct perf_sample *sample __maybe_unused,
 244                                      struct perf_evsel *evsel __maybe_unused,
 245                                      struct machine *machine __maybe_unused)
 246 {
 247         dump_printf(": unhandled!\n");
 248         return 0;
 249 }
 250
 251 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 252                               union perf_event *event __maybe_unused,
 253                               struct perf_sample *sample __maybe_unused,
 254                               struct machine *machine __maybe_unused)
 255 {
 256         dump_printf(": unhandled!\n");
 257         return 0;
 258 }
 259
 260 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 261                                        union perf_event *event __maybe_unused,
 262                                        struct ordered_events *oe __maybe_unused)
 263 {
 264         dump_printf(": unhandled!\n");
 265         return 0;
 266 }
 267
 268 static int process_finished_round(struct perf_tool *tool,
 269                                   union perf_event *event,
 270                                   struct ordered_events *oe);
 271
 272 static int skipn(int fd, off_t n)
 273 {
 274         char buf[4096];
 275         ssize_t ret;
 276
 277         while (n > 0) {
 278                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 279                 if (ret <= 0)
 280                         return ret;
 281                 n -= ret;
 282         }
 283
 284         return 0;
 285 }
 286
 287 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
 288                                        union perf_event *event,
 289                                        struct perf_session *session
 290                                        __maybe_unused)
 291 {
 292         dump_printf(": unhandled!\n");
 293         if (perf_data__is_pipe(session->data))
 294                 skipn(perf_data__fd(session->data), event->auxtrace.size);
 295         return event->auxtrace.size;
 296 }
 297
 298 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused,
 299                                   union perf_event *event __maybe_unused,
 300                                   struct perf_session *session __maybe_unused)
 301 {
 302         dump_printf(": unhandled!\n");
 303         return 0;
 304 }
 305
 306
 307 static
 308 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
 309                                   union perf_event *event __maybe_unused,
 310                                   struct perf_session *session __maybe_unused)
 311 {
 312         if (dump_trace)
 313                 perf_event__fprintf_thread_map(event, stdout);
 314
 315         dump_printf(": unhandled!\n");
 316         return 0;
 317 }
 318
 319 static
 320 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
 321                                union perf_event *event __maybe_unused,
 322                                struct perf_session *session __maybe_unused)
 323 {
 324         if (dump_trace)
 325                 perf_event__fprintf_cpu_map(event, stdout);
 326
 327         dump_printf(": unhandled!\n");
 328         return 0;
 329 }
 330
 331 static
 332 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
 333                                    union perf_event *event __maybe_unused,
 334                                    struct perf_session *session __maybe_unused)
 335 {
 336         if (dump_trace)
 337                 perf_event__fprintf_stat_config(event, stdout);
 338
 339         dump_printf(": unhandled!\n");
 340         return 0;
 341 }
 342
 343 static int process_stat_stub(struct perf_tool *tool __maybe_unused,
 344                              union perf_event *event __maybe_unused,
 345                              struct perf_session *perf_session
 346                              __maybe_unused)
 347 {
 348         if (dump_trace)
 349                 perf_event__fprintf_stat(event, stdout);
 350
 351         dump_printf(": unhandled!\n");
 352         return 0;
 353 }
 354
 355 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
 356                                    union perf_event *event __maybe_unused,
 357                                    struct perf_session *perf_session
 358                                    __maybe_unused)
 359 {
 360         if (dump_trace)
 361                 perf_event__fprintf_stat_round(event, stdout);
 362
 363         dump_printf(": unhandled!\n");
 364         return 0;
 365 }
 366
 367 void perf_tool__fill_defaults(struct perf_tool *tool)
 368 {
 369         if (tool->sample == NULL)
 370                 tool->sample = process_event_sample_stub;
 371         if (tool->mmap == NULL)
 372                 tool->mmap = process_event_stub;
 373         if (tool->mmap2 == NULL)
 374                 tool->mmap2 = process_event_stub;
 375         if (tool->comm == NULL)
 376                 tool->comm = process_event_stub;
 377         if (tool->namespaces == NULL)
 378                 tool->namespaces = process_event_stub;
 379         if (tool->fork == NULL)
 380                 tool->fork = process_event_stub;
 381         if (tool->exit == NULL)
 382                 tool->exit = process_event_stub;
 383         if (tool->lost == NULL)
 384                 tool->lost = perf_event__process_lost;
 385         if (tool->lost_samples == NULL)
 386                 tool->lost_samples = perf_event__process_lost_samples;
 387         if (tool->aux == NULL)
 388                 tool->aux = perf_event__process_aux;
 389         if (tool->itrace_start == NULL)
 390                 tool->itrace_start = perf_event__process_itrace_start;
 391         if (tool->context_switch == NULL)
 392                 tool->context_switch = perf_event__process_switch;
 393         if (tool->read == NULL)
 394                 tool->read = process_event_sample_stub;
 395         if (tool->throttle == NULL)
 396                 tool->throttle = process_event_stub;
 397         if (tool->unthrottle == NULL)
 398                 tool->unthrottle = process_event_stub;
 399         if (tool->attr == NULL)
 400                 tool->attr = process_event_synth_attr_stub;
 401         if (tool->event_update == NULL)
 402                 tool->event_update = process_event_synth_event_update_stub;
 403         if (tool->tracing_data == NULL)
 404                 tool->tracing_data = process_event_synth_tracing_data_stub;
 405         if (tool->build_id == NULL)
 406                 tool->build_id = process_event_op2_stub;
 407         if (tool->finished_round == NULL) {
 408                 if (tool->ordered_events)
 409                         tool->finished_round = process_finished_round;
 410                 else
 411                         tool->finished_round = process_finished_round_stub;
 412         }
 413         if (tool->id_index == NULL)
 414                 tool->id_index = process_event_op2_stub;
 415         if (tool->auxtrace_info == NULL)
 416                 tool->auxtrace_info = process_event_op2_stub;
 417         if (tool->auxtrace == NULL)
 418                 tool->auxtrace = process_event_auxtrace_stub;
 419         if (tool->auxtrace_error == NULL)
 420                 tool->auxtrace_error = process_event_op2_stub;
 421         if (tool->thread_map == NULL)
 422                 tool->thread_map = process_event_thread_map_stub;
 423         if (tool->cpu_map == NULL)
 424                 tool->cpu_map = process_event_cpu_map_stub;
 425         if (tool->stat_config == NULL)
 426                 tool->stat_config = process_event_stat_config_stub;
 427         if (tool->stat == NULL)
 428                 tool->stat = process_stat_stub;
 429         if (tool->stat_round == NULL)
 430                 tool->stat_round = process_stat_round_stub;
 431         if (tool->time_conv == NULL)
 432                 tool->time_conv = process_event_op2_stub;
 433         if (tool->feature == NULL)
 434                 tool->feature = process_event_op2_stub;
 435 }
 436
 437 static void swap_sample_id_all(union perf_event *event, void *data)
 438 {
 439         void *end = (void *) event + event->header.size;
 440         int size = end - data;
 441
 442         BUG_ON(size % sizeof(u64));
 443         mem_bswap_64(data, size);
 444 }
 445
 446 static void perf_event__all64_swap(union perf_event *event,
 447                                    bool sample_id_all __maybe_unused)
 448 {
 449         struct perf_event_header *hdr = &event->header;
 450         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 451 }
 452
 453 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 454 {
 455         event->comm.pid = bswap_32(event->comm.pid);
 456         event->comm.tid = bswap_32(event->comm.tid);
 457
 458         if (sample_id_all) {
 459                 void *data = &event->comm.comm;
 460
 461                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 462                 swap_sample_id_all(event, data);
 463         }
 464 }
 465
 466 static void perf_event__mmap_swap(union perf_event *event,
 467                                   bool sample_id_all)
 468 {
 469         event->mmap.pid   = bswap_32(event->mmap.pid);
 470         event->mmap.tid   = bswap_32(event->mmap.tid);
 471         event->mmap.start = bswap_64(event->mmap.start);
 472         event->mmap.len   = bswap_64(event->mmap.len);
 473         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 474
 475         if (sample_id_all) {
 476                 void *data = &event->mmap.filename;
 477
 478                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 479                 swap_sample_id_all(event, data);
 480         }
 481 }
 482
 483 static void perf_event__mmap2_swap(union perf_event *event,
 484                                   bool sample_id_all)
 485 {
 486         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 487         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 488         event->mmap2.start = bswap_64(event->mmap2.start);
 489         event->mmap2.len   = bswap_64(event->mmap2.len);
 490         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 491         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 492         event->mmap2.min   = bswap_32(event->mmap2.min);
 493         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 494
 495         if (sample_id_all) {
 496                 void *data = &event->mmap2.filename;
 497
 498                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 499                 swap_sample_id_all(event, data);
 500         }
 501 }
 502 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 503 {
 504         event->fork.pid  = bswap_32(event->fork.pid);
 505         event->fork.tid  = bswap_32(event->fork.tid);
 506         event->fork.ppid = bswap_32(event->fork.ppid);
 507         event->fork.ptid = bswap_32(event->fork.ptid);
 508         event->fork.time = bswap_64(event->fork.time);
 509
 510         if (sample_id_all)
 511                 swap_sample_id_all(event, &event->fork + 1);
 512 }
 513
 514 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 515 {
 516         event->read.pid          = bswap_32(event->read.pid);
 517         event->read.tid          = bswap_32(event->read.tid);
 518         event->read.value        = bswap_64(event->read.value);
 519         event->read.time_enabled = bswap_64(event->read.time_enabled);
 520         event->read.time_running = bswap_64(event->read.time_running);
 521         event->read.id           = bswap_64(event->read.id);
 522
 523         if (sample_id_all)
 524                 swap_sample_id_all(event, &event->read + 1);
 525 }
 526
 527 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 528 {
 529         event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 530         event->aux.aux_size   = bswap_64(event->aux.aux_size);
 531         event->aux.flags      = bswap_64(event->aux.flags);
 532
 533         if (sample_id_all)
 534                 swap_sample_id_all(event, &event->aux + 1);
 535 }
 536
 537 static void perf_event__itrace_start_swap(union perf_event *event,
 538                                           bool sample_id_all)
 539 {
 540         event->itrace_start.pid  = bswap_32(event->itrace_start.pid);
 541         event->itrace_start.tid  = bswap_32(event->itrace_start.tid);
 542
 543         if (sample_id_all)
 544                 swap_sample_id_all(event, &event->itrace_start + 1);
 545 }
 546
 547 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 548 {
 549         if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 550                 event->context_switch.next_prev_pid =
 551                                 bswap_32(event->context_switch.next_prev_pid);
 552                 event->context_switch.next_prev_tid =
 553                                 bswap_32(event->context_switch.next_prev_tid);
 554         }
 555
 556         if (sample_id_all)
 557                 swap_sample_id_all(event, &event->context_switch + 1);
 558 }
 559
 560 static void perf_event__throttle_swap(union perf_event *event,
 561                                       bool sample_id_all)
 562 {
 563         event->throttle.time      = bswap_64(event->throttle.time);
 564         event->throttle.id        = bswap_64(event->throttle.id);
 565         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 566
 567         if (sample_id_all)
 568                 swap_sample_id_all(event, &event->throttle + 1);
 569 }
 570
 571 static u8 revbyte(u8 b)
 572 {
 573         int rev = (b >> 4) | ((b & 0xf) << 4);
 574         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 575         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 576         return (u8) rev;
 577 }
 578
 579 /*
 580  * XXX this is hack in attempt to carry flags bitfield
 581  * through endian village. ABI says:
 582  *
 583  * Bit-fields are allocated from right to left (least to most significant)
 584  * on little-endian implementations and from left to right (most to least
 585  * significant) on big-endian implementations.
 586  *
 587  * The above seems to be byte specific, so we need to reverse each
 588  * byte of the bitfield. 'Internet' also says this might be implementation
 589  * specific and we probably need proper fix and carry perf_event_attr
 590  * bitfield flags in separate data file FEAT_ section. Thought this seems
 591  * to work for now.
 592  */
 593 static void swap_bitfield(u8 *p, unsigned len)
 594 {
 595         unsigned i;
 596
 597         for (i = 0; i < len; i++) {
 598                 *p = revbyte(*p);
 599                 p++;
 600         }
 601 }
 602
 603 /* exported for swapping attributes in file header */
 604 void perf_event__attr_swap(struct perf_event_attr *attr)
 605 {
 606         attr->type              = bswap_32(attr->type);
 607         attr->size              = bswap_32(attr->size);
 608
 609 #define bswap_safe(f, n)                                        \
 610         (attr->size > (offsetof(struct perf_event_attr, f) +    \
 611                        sizeof(attr->f) * (n)))
 612 #define bswap_field(f, sz)                      \
 613 do {                                            \
 614         if (bswap_safe(f, 0))                   \
 615                 attr->f = bswap_##sz(attr->f);  \
 616 } while(0)
 617 #define bswap_field_16(f) bswap_field(f, 16)
 618 #define bswap_field_32(f) bswap_field(f, 32)
 619 #define bswap_field_64(f) bswap_field(f, 64)
 620
 621         bswap_field_64(config);
 622         bswap_field_64(sample_period);
 623         bswap_field_64(sample_type);
 624         bswap_field_64(read_format);
 625         bswap_field_32(wakeup_events);
 626         bswap_field_32(bp_type);
 627         bswap_field_64(bp_addr);
 628         bswap_field_64(bp_len);
 629         bswap_field_64(branch_sample_type);
 630         bswap_field_64(sample_regs_user);
 631         bswap_field_32(sample_stack_user);
 632         bswap_field_32(aux_watermark);
 633         bswap_field_16(sample_max_stack);
 634
 635         /*
 636          * After read_format are bitfields. Check read_format because
 637          * we are unable to use offsetof on bitfield.
 638          */
 639         if (bswap_safe(read_format, 1))
 640                 swap_bitfield((u8 *) (&attr->read_format + 1),
 641                               sizeof(u64));
 642 #undef bswap_field_64
 643 #undef bswap_field_32
 644 #undef bswap_field
 645 #undef bswap_safe
 646 }
 647
 648 static void perf_event__hdr_attr_swap(union perf_event *event,
 649                                       bool sample_id_all __maybe_unused)
 650 {
 651         size_t size;
 652
 653         perf_event__attr_swap(&event->attr.attr);
 654
 655         size = event->header.size;
 656         size -= (void *)&event->attr.id - (void *)event;
 657         mem_bswap_64(event->attr.id, size);
 658 }
 659
 660 static void perf_event__event_update_swap(union perf_event *event,
 661                                           bool sample_id_all __maybe_unused)
 662 {
 663         event->event_update.type = bswap_64(event->event_update.type);
 664         event->event_update.id   = bswap_64(event->event_update.id);
 665 }
 666
 667 static void perf_event__event_type_swap(union perf_event *event,
 668                                         bool sample_id_all __maybe_unused)
 669 {
 670         event->event_type.event_type.event_id =
 671                 bswap_64(event->event_type.event_type.event_id);
 672 }
 673
 674 static void perf_event__tracing_data_swap(union perf_event *event,
 675                                           bool sample_id_all __maybe_unused)
 676 {
 677         event->tracing_data.size = bswap_32(event->tracing_data.size);
 678 }
 679
 680 static void perf_event__auxtrace_info_swap(union perf_event *event,
 681                                            bool sample_id_all __maybe_unused)
 682 {
 683         size_t size;
 684
 685         event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 686
 687         size = event->header.size;
 688         size -= (void *)&event->auxtrace_info.priv - (void *)event;
 689         mem_bswap_64(event->auxtrace_info.priv, size);
 690 }
 691
 692 static void perf_event__auxtrace_swap(union perf_event *event,
 693                                       bool sample_id_all __maybe_unused)
 694 {
 695         event->auxtrace.size      = bswap_64(event->auxtrace.size);
 696         event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 697         event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 698         event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 699         event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 700         event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 701 }
 702
 703 static void perf_event__auxtrace_error_swap(union perf_event *event,
 704                                             bool sample_id_all __maybe_unused)
 705 {
 706         event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 707         event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 708         event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 709         event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 710         event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 711         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 712 }
 713
 714 static void perf_event__thread_map_swap(union perf_event *event,
 715                                         bool sample_id_all __maybe_unused)
 716 {
 717         unsigned i;
 718
 719         event->thread_map.nr = bswap_64(event->thread_map.nr);
 720
 721         for (i = 0; i < event->thread_map.nr; i++)
 722                 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
 723 }
 724
 725 static void perf_event__cpu_map_swap(union perf_event *event,
 726                                      bool sample_id_all __maybe_unused)
 727 {
 728         struct cpu_map_data *data = &event->cpu_map.data;
 729         struct cpu_map_entries *cpus;
 730         struct cpu_map_mask *mask;
 731         unsigned i;
 732
 733         data->type = bswap_64(data->type);
 734
 735         switch (data->type) {
 736         case PERF_CPU_MAP__CPUS:
 737                 cpus = (struct cpu_map_entries *)data->data;
 738
 739                 cpus->nr = bswap_16(cpus->nr);
 740
 741                 for (i = 0; i < cpus->nr; i++)
 742                         cpus->cpu[i] = bswap_16(cpus->cpu[i]);
 743                 break;
 744         case PERF_CPU_MAP__MASK:
 745                 mask = (struct cpu_map_mask *) data->data;
 746
 747                 mask->nr = bswap_16(mask->nr);
 748                 mask->long_size = bswap_16(mask->long_size);
 749
 750                 switch (mask->long_size) {
 751                 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
 752                 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
 753                 default:
 754                         pr_err("cpu_map swap: unsupported long size\n");
 755                 }
 756         default:
 757                 break;
 758         }
 759 }
 760
 761 static void perf_event__stat_config_swap(union perf_event *event,
 762                                          bool sample_id_all __maybe_unused)
 763 {
 764         u64 size;
 765
 766         size  = event->stat_config.nr * sizeof(event->stat_config.data[0]);
 767         size += 1; /* nr item itself */
 768         mem_bswap_64(&event->stat_config.nr, size);
 769 }
 770
 771 static void perf_event__stat_swap(union perf_event *event,
 772                                   bool sample_id_all __maybe_unused)
 773 {
 774         event->stat.id     = bswap_64(event->stat.id);
 775         event->stat.thread = bswap_32(event->stat.thread);
 776         event->stat.cpu    = bswap_32(event->stat.cpu);
 777         event->stat.val    = bswap_64(event->stat.val);
 778         event->stat.ena    = bswap_64(event->stat.ena);
 779         event->stat.run    = bswap_64(event->stat.run);
 780 }
 781
 782 static void perf_event__stat_round_swap(union perf_event *event,
 783                                         bool sample_id_all __maybe_unused)
 784 {
 785         event->stat_round.type = bswap_64(event->stat_round.type);
 786         event->stat_round.time = bswap_64(event->stat_round.time);
 787 }
 788
 789 typedef void (*perf_event__swap_op)(union perf_event *event,
 790                                     bool sample_id_all);
 791
 792 static perf_event__swap_op perf_event__swap_ops[] = {
 793         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 794         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 795         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 796         [PERF_RECORD_FORK]                = perf_event__task_swap,
 797         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 798         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 799         [PERF_RECORD_READ]                = perf_event__read_swap,
 800         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 801         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 802         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 803         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
 804         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
 805         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
 806         [PERF_RECORD_SWITCH]              = perf_event__switch_swap,
 807         [PERF_RECORD_SWITCH_CPU_WIDE]     = perf_event__switch_swap,
 808         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 809         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 810         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 811         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 812         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
 813         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
 814         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
 815         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
 816         [PERF_RECORD_THREAD_MAP]          = perf_event__thread_map_swap,
 817         [PERF_RECORD_CPU_MAP]             = perf_event__cpu_map_swap,
 818         [PERF_RECORD_STAT_CONFIG]         = perf_event__stat_config_swap,
 819         [PERF_RECORD_STAT]                = perf_event__stat_swap,
 820         [PERF_RECORD_STAT_ROUND]          = perf_event__stat_round_swap,
 821         [PERF_RECORD_EVENT_UPDATE]        = perf_event__event_update_swap,
 822         [PERF_RECORD_TIME_CONV]           = perf_event__all64_swap,
 823         [PERF_RECORD_HEADER_MAX]          = NULL,
 824 };
 825
 826 /*
 827  * When perf record finishes a pass on every buffers, it records this pseudo
 828  * event.
 829  * We record the max timestamp t found in the pass n.
 830  * Assuming these timestamps are monotonic across cpus, we know that if
 831  * a buffer still has events with timestamps below t, they will be all
 832  * available and then read in the pass n + 1.
 833  * Hence when we start to read the pass n + 2, we can safely flush every
 834  * events with timestamps below t.
 835  *
 836  *    ============ PASS n =================
 837  *       CPU 0         |   CPU 1
 838  *                     |
 839  *    cnt1 timestamps  |   cnt2 timestamps
 840  *          1          |         2
 841  *          2          |         3
 842  *          -          |         4  <--- max recorded
 843  *
 844  *    ============ PASS n + 1 ==============
 845  *       CPU 0         |   CPU 1
 846  *                     |
 847  *    cnt1 timestamps  |   cnt2 timestamps
 848  *          3          |         5
 849  *          4          |         6
 850  *          5          |         7 <---- max recorded
 851  *
 852  *      Flush every events below timestamp 4
 853  *
 854  *    ============ PASS n + 2 ==============
 855  *       CPU 0         |   CPU 1
 856  *                     |
 857  *    cnt1 timestamps  |   cnt2 timestamps
 858  *          6          |         8
 859  *          7          |         9
 860  *          -          |         10
 861  *
 862  *      Flush every events below timestamp 7
 863  *      etc...
 864  */
 865 static int process_finished_round(struct perf_tool *tool __maybe_unused,
 866                                   union perf_event *event __maybe_unused,
 867                                   struct ordered_events *oe)
 868 {
 869         if (dump_trace)
 870                 fprintf(stdout, "\n");
 871         return ordered_events__flush(oe, OE_FLUSH__ROUND);
 872 }
 873
 874 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
 875                               struct perf_sample *sample, u64 file_offset)
 876 {
 877         return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
 878 }
 879
 880 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 881 {
 882         struct ip_callchain *callchain = sample->callchain;
 883         struct branch_stack *lbr_stack = sample->branch_stack;
 884         u64 kernel_callchain_nr = callchain->nr;
 885         unsigned int i;
 886
 887         for (i = 0; i < kernel_callchain_nr; i++) {
 888                 if (callchain->ips[i] == PERF_CONTEXT_USER)
 889                         break;
 890         }
 891
 892         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 893                 u64 total_nr;
 894                 /*
 895                  * LBR callstack can only get user call chain,
 896                  * i is kernel call chain number,
 897                  * 1 is PERF_CONTEXT_USER.
 898                  *
 899                  * The user call chain is stored in LBR registers.
 900                  * LBR are pair registers. The caller is stored
 901                  * in "from" register, while the callee is stored
 902                  * in "to" register.
 903                  * For example, there is a call stack
 904                  * "A"->"B"->"C"->"D".
 905                  * The LBR registers will recorde like
 906                  * "C"->"D", "B"->"C", "A"->"B".
 907                  * So only the first "to" register and all "from"
 908                  * registers are needed to construct the whole stack.
 909                  */
 910                 total_nr = i + 1 + lbr_stack->nr + 1;
 911                 kernel_callchain_nr = i + 1;
 912
 913                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 914
 915                 for (i = 0; i < kernel_callchain_nr; i++)
 916                         printf("..... %2d: %016" PRIx64 "\n",
 917                                i, callchain->ips[i]);
 918
 919                 printf("..... %2d: %016" PRIx64 "\n",
 920                        (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 921                 for (i = 0; i < lbr_stack->nr; i++)
 922                         printf("..... %2d: %016" PRIx64 "\n",
 923                                (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 924         }
 925 }
 926
 927 static void callchain__printf(struct perf_evsel *evsel,
 928                               struct perf_sample *sample)
 929 {
 930         unsigned int i;
 931         struct ip_callchain *callchain = sample->callchain;
 932
 933         if (perf_evsel__has_branch_callstack(evsel))
 934                 callchain__lbr_callstack_printf(sample);
 935
 936         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 937
 938         for (i = 0; i < callchain->nr; i++)
 939                 printf("..... %2d: %016" PRIx64 "\n",
 940                        i, callchain->ips[i]);
 941 }
 942
 943 static void branch_stack__printf(struct perf_sample *sample)
 944 {
 945         uint64_t i;
 946
 947         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 948
 949         for (i = 0; i < sample->branch_stack->nr; i++) {
 950                 struct branch_entry *e = &sample->branch_stack->entries[i];
 951
 952                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
 953                         i, e->from, e->to,
 954                         (unsigned short)e->flags.cycles,
 955                         e->flags.mispred ? "M" : " ",
 956                         e->flags.predicted ? "P" : " ",
 957                         e->flags.abort ? "A" : " ",
 958                         e->flags.in_tx ? "T" : " ",
 959                         (unsigned)e->flags.reserved);
 960         }
 961 }
 962
 963 static void regs_dump__printf(u64 mask, u64 *regs)
 964 {
 965         unsigned rid, i = 0;
 966
 967         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 968                 u64 val = regs[i++];
 969
 970                 printf(".... %-5s 0x%" PRIx64 "\n",
 971                        perf_reg_name(rid), val);
 972         }
 973 }
 974
 975 static const char *regs_abi[] = {
 976         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
 977         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 978         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 979 };
 980
 981 static inline const char *regs_dump_abi(struct regs_dump *d)
 982 {
 983         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 984                 return "unknown";
 985
 986         return regs_abi[d->abi];
 987 }
 988
 989 static void regs__printf(const char *type, struct regs_dump *regs)
 990 {
 991         u64 mask = regs->mask;
 992
 993         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 994                type,
 995                mask,
 996                regs_dump_abi(regs));
 997
 998         regs_dump__printf(mask, regs->regs);
 999 }
1000
1001 static void regs_user__printf(struct perf_sample *sample)
1002 {
1003         struct regs_dump *user_regs = &sample->user_regs;
1004
1005         if (user_regs->regs)
1006                 regs__printf("user", user_regs);
1007 }
1008
1009 static void regs_intr__printf(struct perf_sample *sample)
1010 {
1011         struct regs_dump *intr_regs = &sample->intr_regs;
1012
1013         if (intr_regs->regs)
1014                 regs__printf("intr", intr_regs);
1015 }
1016
1017 static void stack_user__printf(struct stack_dump *dump)
1018 {
1019         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1020                dump->size, dump->offset);
1021 }
1022
1023 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1024                                        union perf_event *event,
1025                                        struct perf_sample *sample)
1026 {
1027         u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1028
1029         if (event->header.type != PERF_RECORD_SAMPLE &&
1030             !perf_evlist__sample_id_all(evlist)) {
1031                 fputs("-1 -1 ", stdout);
1032                 return;
1033         }
1034
1035         if ((sample_type & PERF_SAMPLE_CPU))
1036                 printf("%u ", sample->cpu);
1037
1038         if (sample_type & PERF_SAMPLE_TIME)
1039                 printf("%" PRIu64 " ", sample->time);
1040 }
1041
1042 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1043 {
1044         printf("... sample_read:\n");
1045
1046         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1047                 printf("...... time enabled %016" PRIx64 "\n",
1048                        sample->read.time_enabled);
1049
1050         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1051                 printf("...... time running %016" PRIx64 "\n",
1052                        sample->read.time_running);
1053
1054         if (read_format & PERF_FORMAT_GROUP) {
1055                 u64 i;
1056
1057                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1058
1059                 for (i = 0; i < sample->read.group.nr; i++) {
1060                         struct sample_read_value *value;
1061
1062                         value = &sample->read.group.values[i];
1063                         printf("..... id %016" PRIx64
1064                                ", value %016" PRIx64 "\n",
1065                                value->id, value->value);
1066                 }
1067         } else
1068                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1069                         sample->read.one.id, sample->read.one.value);
1070 }
1071
1072 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1073                        u64 file_offset, struct perf_sample *sample)
1074 {
1075         if (!dump_trace)
1076                 return;
1077
1078         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1079                file_offset, event->header.size, event->header.type);
1080
1081         trace_event(event);
1082
1083         if (sample)
1084                 perf_evlist__print_tstamp(evlist, event, sample);
1085
1086         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1087                event->header.size, perf_event__name(event->header.type));
1088 }
1089
1090 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1091                         struct perf_sample *sample)
1092 {
1093         u64 sample_type;
1094
1095         if (!dump_trace)
1096                 return;
1097
1098         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1099                event->header.misc, sample->pid, sample->tid, sample->ip,
1100                sample->period, sample->addr);
1101
1102         sample_type = evsel->attr.sample_type;
1103
1104         if (sample_type & PERF_SAMPLE_CALLCHAIN)
1105                 callchain__printf(evsel, sample);
1106
1107         if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel))
1108                 branch_stack__printf(sample);
1109
1110         if (sample_type & PERF_SAMPLE_REGS_USER)
1111                 regs_user__printf(sample);
1112
1113         if (sample_type & PERF_SAMPLE_REGS_INTR)
1114                 regs_intr__printf(sample);
1115
1116         if (sample_type & PERF_SAMPLE_STACK_USER)
1117                 stack_user__printf(&sample->user_stack);
1118
1119         if (sample_type & PERF_SAMPLE_WEIGHT)
1120                 printf("... weight: %" PRIu64 "\n", sample->weight);
1121
1122         if (sample_type & PERF_SAMPLE_DATA_SRC)
1123                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1124
1125         if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1126                 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1127
1128         if (sample_type & PERF_SAMPLE_TRANSACTION)
1129                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1130
1131         if (sample_type & PERF_SAMPLE_READ)
1132                 sample_read__printf(sample, evsel->attr.read_format);
1133 }
1134
1135 static void dump_read(struct perf_evsel *evsel, union perf_event *event)
1136 {
1137         struct read_event *read_event = &event->read;
1138         u64 read_format;
1139
1140         if (!dump_trace)
1141                 return;
1142
1143         printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid,
1144                evsel ? perf_evsel__name(evsel) : "FAIL",
1145                event->read.value);
1146
1147         read_format = evsel->attr.read_format;
1148
1149         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1150                 printf("... time enabled : %" PRIu64 "\n", read_event->time_enabled);
1151
1152         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1153                 printf("... time running : %" PRIu64 "\n", read_event->time_running);
1154
1155         if (read_format & PERF_FORMAT_ID)
1156                 printf("... id           : %" PRIu64 "\n", read_event->id);
1157 }
1158
1159 static struct machine *machines__find_for_cpumode(struct machines *machines,
1160                                                union perf_event *event,
1161                                                struct perf_sample *sample)
1162 {
1163         struct machine *machine;
1164
1165         if (perf_guest &&
1166             ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1167              (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1168                 u32 pid;
1169
1170                 if (event->header.type == PERF_RECORD_MMAP
1171                     || event->header.type == PERF_RECORD_MMAP2)
1172                         pid = event->mmap.pid;
1173                 else
1174                         pid = sample->pid;
1175
1176                 machine = machines__find(machines, pid);
1177                 if (!machine)
1178                         machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1179                 return machine;
1180         }
1181
1182         return &machines->host;
1183 }
1184
1185 static int deliver_sample_value(struct perf_evlist *evlist,
1186                                 struct perf_tool *tool,
1187                                 union perf_event *event,
1188                                 struct perf_sample *sample,
1189                                 struct sample_read_value *v,
1190                                 struct machine *machine)
1191 {
1192         struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1193
1194         if (sid) {
1195                 sample->id     = v->id;
1196                 sample->period = v->value - sid->period;
1197                 sid->period    = v->value;
1198         }
1199
1200         if (!sid || sid->evsel == NULL) {
1201                 ++evlist->stats.nr_unknown_id;
1202                 return 0;
1203         }
1204
1205         return tool->sample(tool, event, sample, sid->evsel, machine);
1206 }
1207
1208 static int deliver_sample_group(struct perf_evlist *evlist,
1209                                 struct perf_tool *tool,
1210                                 union  perf_event *event,
1211                                 struct perf_sample *sample,
1212                                 struct machine *machine)
1213 {
1214         int ret = -EINVAL;
1215         u64 i;
1216
1217         for (i = 0; i < sample->read.group.nr; i++) {
1218                 ret = deliver_sample_value(evlist, tool, event, sample,
1219                                            &sample->read.group.values[i],
1220                                            machine);
1221                 if (ret)
1222                         break;
1223         }
1224
1225         return ret;
1226 }
1227
1228 static int
1229  perf_evlist__deliver_sample(struct perf_evlist *evlist,
1230                              struct perf_tool *tool,
1231                              union  perf_event *event,
1232                              struct perf_sample *sample,
1233                              struct perf_evsel *evsel,
1234                              struct machine *machine)
1235 {
1236         /* We know evsel != NULL. */
1237         u64 sample_type = evsel->attr.sample_type;
1238         u64 read_format = evsel->attr.read_format;
1239
1240         /* Standard sample delivery. */
1241         if (!(sample_type & PERF_SAMPLE_READ))
1242                 return tool->sample(tool, event, sample, evsel, machine);
1243
1244         /* For PERF_SAMPLE_READ we have either single or group mode. */
1245         if (read_format & PERF_FORMAT_GROUP)
1246                 return deliver_sample_group(evlist, tool, event, sample,
1247                                             machine);
1248         else
1249                 return deliver_sample_value(evlist, tool, event, sample,
1250                                             &sample->read.one, machine);
1251 }
1252
1253 static int machines__deliver_event(struct machines *machines,
1254                                    struct perf_evlist *evlist,
1255                                    union perf_event *event,
1256                                    struct perf_sample *sample,
1257                                    struct perf_tool *tool, u64 file_offset)
1258 {
1259         struct perf_evsel *evsel;
1260         struct machine *machine;
1261
1262         dump_event(evlist, event, file_offset, sample);
1263
1264         evsel = perf_evlist__id2evsel(evlist, sample->id);
1265
1266         machine = machines__find_for_cpumode(machines, event, sample);
1267
1268         switch (event->header.type) {
1269         case PERF_RECORD_SAMPLE:
1270                 if (evsel == NULL) {
1271                         ++evlist->stats.nr_unknown_id;
1272                         return 0;
1273                 }
1274                 dump_sample(evsel, event, sample);
1275                 if (machine == NULL) {
1276                         ++evlist->stats.nr_unprocessable_samples;
1277                         return 0;
1278                 }
1279                 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1280         case PERF_RECORD_MMAP:
1281                 return tool->mmap(tool, event, sample, machine);
1282         case PERF_RECORD_MMAP2:
1283                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1284                         ++evlist->stats.nr_proc_map_timeout;
1285                 return tool->mmap2(tool, event, sample, machine);
1286         case PERF_RECORD_COMM:
1287                 return tool->comm(tool, event, sample, machine);
1288         case PERF_RECORD_NAMESPACES:
1289                 return tool->namespaces(tool, event, sample, machine);
1290         case PERF_RECORD_FORK:
1291                 return tool->fork(tool, event, sample, machine);
1292         case PERF_RECORD_EXIT:
1293                 return tool->exit(tool, event, sample, machine);
1294         case PERF_RECORD_LOST:
1295                 if (tool->lost == perf_event__process_lost)
1296                         evlist->stats.total_lost += event->lost.lost;
1297                 return tool->lost(tool, event, sample, machine);
1298         case PERF_RECORD_LOST_SAMPLES:
1299                 if (tool->lost_samples == perf_event__process_lost_samples)
1300                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1301                 return tool->lost_samples(tool, event, sample, machine);
1302         case PERF_RECORD_READ:
1303                 dump_read(evsel, event);
1304                 return tool->read(tool, event, sample, evsel, machine);
1305         case PERF_RECORD_THROTTLE:
1306                 return tool->throttle(tool, event, sample, machine);
1307         case PERF_RECORD_UNTHROTTLE:
1308                 return tool->unthrottle(tool, event, sample, machine);
1309         case PERF_RECORD_AUX:
1310                 if (tool->aux == perf_event__process_aux) {
1311                         if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1312                                 evlist->stats.total_aux_lost += 1;
1313                         if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1314                                 evlist->stats.total_aux_partial += 1;
1315                 }
1316                 return tool->aux(tool, event, sample, machine);
1317         case PERF_RECORD_ITRACE_START:
1318                 return tool->itrace_start(tool, event, sample, machine);
1319         case PERF_RECORD_SWITCH:
1320         case PERF_RECORD_SWITCH_CPU_WIDE:
1321                 return tool->context_switch(tool, event, sample, machine);
1322         default:
1323                 ++evlist->stats.nr_unknown_events;
1324                 return -1;
1325         }
1326 }
1327
1328 static int perf_session__deliver_event(struct perf_session *session,
1329                                        union perf_event *event,
1330                                        struct perf_sample *sample,
1331                                        struct perf_tool *tool,
1332                                        u64 file_offset)
1333 {
1334         int ret;
1335
1336         ret = auxtrace__process_event(session, event, sample, tool);
1337         if (ret < 0)
1338                 return ret;
1339         if (ret > 0)
1340                 return 0;
1341
1342         return machines__deliver_event(&session->machines, session->evlist,
1343                                        event, sample, tool, file_offset);
1344 }
1345
1346 static s64 perf_session__process_user_event(struct perf_session *session,
1347                                             union perf_event *event,
1348                                             u64 file_offset)
1349 {
1350         struct ordered_events *oe = &session->ordered_events;
1351         struct perf_tool *tool = session->tool;
1352         int fd = perf_data__fd(session->data);
1353         int err;
1354
1355         dump_event(session->evlist, event, file_offset, NULL);
1356
1357         /* These events are processed right away */
1358         switch (event->header.type) {
1359         case PERF_RECORD_HEADER_ATTR:
1360                 err = tool->attr(tool, event, &session->evlist);
1361                 if (err == 0) {
1362                         perf_session__set_id_hdr_size(session);
1363                         perf_session__set_comm_exec(session);
1364                 }
1365                 return err;
1366         case PERF_RECORD_EVENT_UPDATE:
1367                 return tool->event_update(tool, event, &session->evlist);
1368         case PERF_RECORD_HEADER_EVENT_TYPE:
1369                 /*
1370                  * Depreceated, but we need to handle it for sake
1371                  * of old data files create in pipe mode.
1372                  */
1373                 return 0;
1374         case PERF_RECORD_HEADER_TRACING_DATA:
1375                 /* setup for reading amidst mmap */
1376                 lseek(fd, file_offset, SEEK_SET);
1377                 return tool->tracing_data(tool, event, session);
1378         case PERF_RECORD_HEADER_BUILD_ID:
1379                 return tool->build_id(tool, event, session);
1380         case PERF_RECORD_FINISHED_ROUND:
1381                 return tool->finished_round(tool, event, oe);
1382         case PERF_RECORD_ID_INDEX:
1383                 return tool->id_index(tool, event, session);
1384         case PERF_RECORD_AUXTRACE_INFO:
1385                 return tool->auxtrace_info(tool, event, session);
1386         case PERF_RECORD_AUXTRACE:
1387                 /* setup for reading amidst mmap */
1388                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1389                 return tool->auxtrace(tool, event, session);
1390         case PERF_RECORD_AUXTRACE_ERROR:
1391                 perf_session__auxtrace_error_inc(session, event);
1392                 return tool->auxtrace_error(tool, event, session);
1393         case PERF_RECORD_THREAD_MAP:
1394                 return tool->thread_map(tool, event, session);
1395         case PERF_RECORD_CPU_MAP:
1396                 return tool->cpu_map(tool, event, session);
1397         case PERF_RECORD_STAT_CONFIG:
1398                 return tool->stat_config(tool, event, session);
1399         case PERF_RECORD_STAT:
1400                 return tool->stat(tool, event, session);
1401         case PERF_RECORD_STAT_ROUND:
1402                 return tool->stat_round(tool, event, session);
1403         case PERF_RECORD_TIME_CONV:
1404                 session->time_conv = event->time_conv;
1405                 return tool->time_conv(tool, event, session);
1406         case PERF_RECORD_HEADER_FEATURE:
1407                 return tool->feature(tool, event, session);
1408         default:
1409                 return -EINVAL;
1410         }
1411 }
1412
1413 int perf_session__deliver_synth_event(struct perf_session *session,
1414                                       union perf_event *event,
1415                                       struct perf_sample *sample)
1416 {
1417         struct perf_evlist *evlist = session->evlist;
1418         struct perf_tool *tool = session->tool;
1419
1420         events_stats__inc(&evlist->stats, event->header.type);
1421
1422         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1423                 return perf_session__process_user_event(session, event, 0);
1424
1425         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1426 }
1427
1428 static void event_swap(union perf_event *event, bool sample_id_all)
1429 {
1430         perf_event__swap_op swap;
1431
1432         swap = perf_event__swap_ops[event->header.type];
1433         if (swap)
1434                 swap(event, sample_id_all);
1435 }
1436
1437 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1438                              void *buf, size_t buf_sz,
1439                              union perf_event **event_ptr,
1440                              struct perf_sample *sample)
1441 {
1442         union perf_event *event;
1443         size_t hdr_sz, rest;
1444         int fd;
1445
1446         if (session->one_mmap && !session->header.needs_swap) {
1447                 event = file_offset - session->one_mmap_offset +
1448                         session->one_mmap_addr;
1449                 goto out_parse_sample;
1450         }
1451
1452         if (perf_data__is_pipe(session->data))
1453                 return -1;
1454
1455         fd = perf_data__fd(session->data);
1456         hdr_sz = sizeof(struct perf_event_header);
1457
1458         if (buf_sz < hdr_sz)
1459                 return -1;
1460
1461         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1462             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1463                 return -1;
1464
1465         event = (union perf_event *)buf;
1466
1467         if (session->header.needs_swap)
1468                 perf_event_header__bswap(&event->header);
1469
1470         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1471                 return -1;
1472
1473         rest = event->header.size - hdr_sz;
1474
1475         if (readn(fd, buf, rest) != (ssize_t)rest)
1476                 return -1;
1477
1478         if (session->header.needs_swap)
1479                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1480
1481 out_parse_sample:
1482
1483         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1484             perf_evlist__parse_sample(session->evlist, event, sample))
1485                 return -1;
1486
1487         *event_ptr = event;
1488
1489         return 0;
1490 }
1491
1492 static s64 perf_session__process_event(struct perf_session *session,
1493                                        union perf_event *event, u64 file_offset)
1494 {
1495         struct perf_evlist *evlist = session->evlist;
1496         struct perf_tool *tool = session->tool;
1497         struct perf_sample sample;
1498         int ret;
1499
1500         if (session->header.needs_swap)
1501                 event_swap(event, perf_evlist__sample_id_all(evlist));
1502
1503         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1504                 return -EINVAL;
1505
1506         events_stats__inc(&evlist->stats, event->header.type);
1507
1508         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1509                 return perf_session__process_user_event(session, event, file_offset);
1510
1511         /*
1512          * For all kernel events we get the sample data
1513          */
1514         ret = perf_evlist__parse_sample(evlist, event, &sample);
1515         if (ret)
1516                 return ret;
1517
1518         if (tool->ordered_events) {
1519                 ret = perf_session__queue_event(session, event, &sample, file_offset);
1520                 if (ret != -ETIME)
1521                         return ret;
1522         }
1523
1524         return perf_session__deliver_event(session, event, &sample, tool,
1525                                            file_offset);
1526 }
1527
1528 void perf_event_header__bswap(struct perf_event_header *hdr)
1529 {
1530         hdr->type = bswap_32(hdr->type);
1531         hdr->misc = bswap_16(hdr->misc);
1532         hdr->size = bswap_16(hdr->size);
1533 }
1534
1535 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1536 {
1537         return machine__findnew_thread(&session->machines.host, -1, pid);
1538 }
1539
1540 int perf_session__register_idle_thread(struct perf_session *session)
1541 {
1542         struct thread *thread;
1543         int err = 0;
1544
1545         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1546         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1547                 pr_err("problem inserting idle task.\n");
1548                 err = -1;
1549         }
1550
1551         if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1552                 pr_err("problem inserting idle task.\n");
1553                 err = -1;
1554         }
1555
1556         /* machine__findnew_thread() got the thread, so put it */
1557         thread__put(thread);
1558         return err;
1559 }
1560
1561 static void
1562 perf_session__warn_order(const struct perf_session *session)
1563 {
1564         const struct ordered_events *oe = &session->ordered_events;
1565         struct perf_evsel *evsel;
1566         bool should_warn = true;
1567
1568         evlist__for_each_entry(session->evlist, evsel) {
1569                 if (evsel->attr.write_backward)
1570                         should_warn = false;
1571         }
1572
1573         if (!should_warn)
1574                 return;
1575         if (oe->nr_unordered_events != 0)
1576                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1577 }
1578
1579 static void perf_session__warn_about_errors(const struct perf_session *session)
1580 {
1581         const struct events_stats *stats = &session->evlist->stats;
1582
1583         if (session->tool->lost == perf_event__process_lost &&
1584             stats->nr_events[PERF_RECORD_LOST] != 0) {
1585                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1586                             "Check IO/CPU overload!\n\n",
1587                             stats->nr_events[0],
1588                             stats->nr_events[PERF_RECORD_LOST]);
1589         }
1590
1591         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1592                 double drop_rate;
1593
1594                 drop_rate = (double)stats->total_lost_samples /
1595                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1596                 if (drop_rate > 0.05) {
1597                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1598                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1599                                     drop_rate * 100.0);
1600                 }
1601         }
1602
1603         if (session->tool->aux == perf_event__process_aux &&
1604             stats->total_aux_lost != 0) {
1605                 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1606                             stats->total_aux_lost,
1607                             stats->nr_events[PERF_RECORD_AUX]);
1608         }
1609
1610         if (session->tool->aux == perf_event__process_aux &&
1611             stats->total_aux_partial != 0) {
1612                 bool vmm_exclusive = false;
1613
1614                 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1615                                        &vmm_exclusive);
1616
1617                 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1618                             "Are you running a KVM guest in the background?%s\n\n",
1619                             stats->total_aux_partial,
1620                             stats->nr_events[PERF_RECORD_AUX],
1621                             vmm_exclusive ?
1622                             "\nReloading kvm_intel module with vmm_exclusive=0\n"
1623                             "will reduce the gaps to only guest's timeslices." :
1624                             "");
1625         }
1626
1627         if (stats->nr_unknown_events != 0) {
1628                 ui__warning("Found %u unknown events!\n\n"
1629                             "Is this an older tool processing a perf.data "
1630                             "file generated by a more recent tool?\n\n"
1631                             "If that is not the case, consider "
1632                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1633                             stats->nr_unknown_events);
1634         }
1635
1636         if (stats->nr_unknown_id != 0) {
1637                 ui__warning("%u samples with id not present in the header\n",
1638                             stats->nr_unknown_id);
1639         }
1640
1641         if (stats->nr_invalid_chains != 0) {
1642                 ui__warning("Found invalid callchains!\n\n"
1643                             "%u out of %u events were discarded for this reason.\n\n"
1644                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1645                             stats->nr_invalid_chains,
1646                             stats->nr_events[PERF_RECORD_SAMPLE]);
1647         }
1648
1649         if (stats->nr_unprocessable_samples != 0) {
1650                 ui__warning("%u unprocessable samples recorded.\n"
1651                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1652                             stats->nr_unprocessable_samples);
1653         }
1654
1655         perf_session__warn_order(session);
1656
1657         events_stats__auxtrace_error_warn(stats);
1658
1659         if (stats->nr_proc_map_timeout != 0) {
1660                 ui__warning("%d map information files for pre-existing threads were\n"
1661                             "not processed, if there are samples for addresses they\n"
1662                             "will not be resolved, you may find out which are these\n"
1663                             "threads by running with -v and redirecting the output\n"
1664                             "to a file.\n"
1665                             "The time limit to process proc map is too short?\n"
1666                             "Increase it by --proc-map-timeout\n",
1667                             stats->nr_proc_map_timeout);
1668         }
1669 }
1670
1671 static int perf_session__flush_thread_stack(struct thread *thread,
1672                                             void *p __maybe_unused)
1673 {
1674         return thread_stack__flush(thread);
1675 }
1676
1677 static int perf_session__flush_thread_stacks(struct perf_session *session)
1678 {
1679         return machines__for_each_thread(&session->machines,
1680                                          perf_session__flush_thread_stack,
1681                                          NULL);
1682 }
1683
1684 volatile int session_done;
1685
1686 static int __perf_session__process_pipe_events(struct perf_session *session)
1687 {
1688         struct ordered_events *oe = &session->ordered_events;
1689         struct perf_tool *tool = session->tool;
1690         int fd = perf_data__fd(session->data);
1691         union perf_event *event;
1692         uint32_t size, cur_size = 0;
1693         void *buf = NULL;
1694         s64 skip = 0;
1695         u64 head;
1696         ssize_t err;
1697         void *p;
1698
1699         perf_tool__fill_defaults(tool);
1700
1701         head = 0;
1702         cur_size = sizeof(union perf_event);
1703
1704         buf = malloc(cur_size);
1705         if (!buf)
1706                 return -errno;
1707         ordered_events__set_copy_on_queue(oe, true);
1708 more:
1709         event = buf;
1710         err = readn(fd, event, sizeof(struct perf_event_header));
1711         if (err <= 0) {
1712                 if (err == 0)
1713                         goto done;
1714
1715                 pr_err("failed to read event header\n");
1716                 goto out_err;
1717         }
1718
1719         if (session->header.needs_swap)
1720                 perf_event_header__bswap(&event->header);
1721
1722         size = event->header.size;
1723         if (size < sizeof(struct perf_event_header)) {
1724                 pr_err("bad event header size\n");
1725                 goto out_err;
1726         }
1727
1728         if (size > cur_size) {
1729                 void *new = realloc(buf, size);
1730                 if (!new) {
1731                         pr_err("failed to allocate memory to read event\n");
1732                         goto out_err;
1733                 }
1734                 buf = new;
1735                 cur_size = size;
1736                 event = buf;
1737         }
1738         p = event;
1739         p += sizeof(struct perf_event_header);
1740
1741         if (size - sizeof(struct perf_event_header)) {
1742                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1743                 if (err <= 0) {
1744                         if (err == 0) {
1745                                 pr_err("unexpected end of event stream\n");
1746                                 goto done;
1747                         }
1748
1749                         pr_err("failed to read event data\n");
1750                         goto out_err;
1751                 }
1752         }
1753
1754         if ((skip = perf_session__process_event(session, event, head)) < 0) {
1755                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1756                        head, event->header.size, event->header.type);
1757                 err = -EINVAL;
1758                 goto out_err;
1759         }
1760
1761         head += size;
1762
1763         if (skip > 0)
1764                 head += skip;
1765
1766         if (!session_done())
1767                 goto more;
1768 done:
1769         /* do the final flush for ordered samples */
1770         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1771         if (err)
1772                 goto out_err;
1773         err = auxtrace__flush_events(session, tool);
1774         if (err)
1775                 goto out_err;
1776         err = perf_session__flush_thread_stacks(session);
1777 out_err:
1778         free(buf);
1779         perf_session__warn_about_errors(session);
1780         ordered_events__free(&session->ordered_events);
1781         auxtrace__free_events(session);
1782         return err;
1783 }
1784
1785 static union perf_event *
1786 fetch_mmaped_event(struct perf_session *session,
1787                    u64 head, size_t mmap_size, char *buf)
1788 {
1789         union perf_event *event;
1790
1791         /*
1792          * Ensure we have enough space remaining to read
1793          * the size of the event in the headers.
1794          */
1795         if (head + sizeof(event->header) > mmap_size)
1796                 return NULL;
1797
1798         event = (union perf_event *)(buf + head);
1799
1800         if (session->header.needs_swap)
1801                 perf_event_header__bswap(&event->header);
1802
1803         if (head + event->header.size > mmap_size) {
1804                 /* We're not fetching the event so swap back again */
1805                 if (session->header.needs_swap)
1806                         perf_event_header__bswap(&event->header);
1807                 return NULL;
1808         }
1809
1810         return event;
1811 }
1812
1813 /*
1814  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1815  * slices. On 32bit we use 32MB.
1816  */
1817 #if BITS_PER_LONG == 64
1818 #define MMAP_SIZE ULLONG_MAX
1819 #define NUM_MMAPS 1
1820 #else
1821 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1822 #define NUM_MMAPS 128
1823 #endif
1824
1825 static int __perf_session__process_events(struct perf_session *session,
1826                                           u64 data_offset, u64 data_size,
1827                                           u64 file_size)
1828 {
1829         struct ordered_events *oe = &session->ordered_events;
1830         struct perf_tool *tool = session->tool;
1831         int fd = perf_data__fd(session->data);
1832         u64 head, page_offset, file_offset, file_pos, size;
1833         int err, mmap_prot, mmap_flags, map_idx = 0;
1834         size_t  mmap_size;
1835         char *buf, *mmaps[NUM_MMAPS];
1836         union perf_event *event;
1837         struct ui_progress prog;
1838         s64 skip;
1839
1840         perf_tool__fill_defaults(tool);
1841
1842         page_offset = page_size * (data_offset / page_size);
1843         file_offset = page_offset;
1844         head = data_offset - page_offset;
1845
1846         if (data_size == 0)
1847                 goto out;
1848
1849         if (data_offset + data_size < file_size)
1850                 file_size = data_offset + data_size;
1851
1852         ui_progress__init_size(&prog, file_size, "Processing events...");
1853
1854         mmap_size = MMAP_SIZE;
1855         if (mmap_size > file_size) {
1856                 mmap_size = file_size;
1857                 session->one_mmap = true;
1858         }
1859
1860         memset(mmaps, 0, sizeof(mmaps));
1861
1862         mmap_prot  = PROT_READ;
1863         mmap_flags = MAP_SHARED;
1864
1865         if (session->header.needs_swap) {
1866                 mmap_prot  |= PROT_WRITE;
1867                 mmap_flags = MAP_PRIVATE;
1868         }
1869 remap:
1870         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1871                    file_offset);
1872         if (buf == MAP_FAILED) {
1873                 pr_err("failed to mmap file\n");
1874                 err = -errno;
1875                 goto out_err;
1876         }
1877         mmaps[map_idx] = buf;
1878         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1879         file_pos = file_offset + head;
1880         if (session->one_mmap) {
1881                 session->one_mmap_addr = buf;
1882                 session->one_mmap_offset = file_offset;
1883         }
1884
1885 more:
1886         event = fetch_mmaped_event(session, head, mmap_size, buf);
1887         if (!event) {
1888                 if (mmaps[map_idx]) {
1889                         munmap(mmaps[map_idx], mmap_size);
1890                         mmaps[map_idx] = NULL;
1891                 }
1892
1893                 page_offset = page_size * (head / page_size);
1894                 file_offset += page_offset;
1895                 head -= page_offset;
1896                 goto remap;
1897         }
1898
1899         size = event->header.size;
1900
1901         if (size < sizeof(struct perf_event_header) ||
1902             (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1903                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1904                        file_offset + head, event->header.size,
1905                        event->header.type);
1906                 err = -EINVAL;
1907                 goto out_err;
1908         }
1909
1910         if (skip)
1911                 size += skip;
1912
1913         head += size;
1914         file_pos += size;
1915
1916         ui_progress__update(&prog, size);
1917
1918         if (session_done())
1919                 goto out;
1920
1921         if (file_pos < file_size)
1922                 goto more;
1923
1924 out:
1925         /* do the final flush for ordered samples */
1926         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1927         if (err)
1928                 goto out_err;
1929         err = auxtrace__flush_events(session, tool);
1930         if (err)
1931                 goto out_err;
1932         err = perf_session__flush_thread_stacks(session);
1933 out_err:
1934         ui_progress__finish();
1935         perf_session__warn_about_errors(session);
1936         /*
1937          * We may switching perf.data output, make ordered_events
1938          * reusable.
1939          */
1940         ordered_events__reinit(&session->ordered_events);
1941         auxtrace__free_events(session);
1942         session->one_mmap = false;
1943         return err;
1944 }
1945
1946 int perf_session__process_events(struct perf_session *session)
1947 {
1948         u64 size = perf_data__size(session->data);
1949         int err;
1950
1951         if (perf_session__register_idle_thread(session) < 0)
1952                 return -ENOMEM;
1953
1954         if (!perf_data__is_pipe(session->data))
1955                 err = __perf_session__process_events(session,
1956                                                      session->header.data_offset,
1957                                                      session->header.data_size, size);
1958         else
1959                 err = __perf_session__process_pipe_events(session);
1960
1961         return err;
1962 }
1963
1964 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1965 {
1966         struct perf_evsel *evsel;
1967
1968         evlist__for_each_entry(session->evlist, evsel) {
1969                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1970                         return true;
1971         }
1972
1973         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1974         return false;
1975 }
1976
1977 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1978                                      const char *symbol_name, u64 addr)
1979 {
1980         char *bracket;
1981         int i;
1982         struct ref_reloc_sym *ref;
1983
1984         ref = zalloc(sizeof(struct ref_reloc_sym));
1985         if (ref == NULL)
1986                 return -ENOMEM;
1987
1988         ref->name = strdup(symbol_name);
1989         if (ref->name == NULL) {
1990                 free(ref);
1991                 return -ENOMEM;
1992         }
1993
1994         bracket = strchr(ref->name, ']');
1995         if (bracket)
1996                 *bracket = '\0';
1997
1998         ref->addr = addr;
1999
2000         for (i = 0; i < MAP__NR_TYPES; ++i) {
2001                 struct kmap *kmap = map__kmap(maps[i]);
2002
2003                 if (!kmap)
2004                         continue;
2005                 kmap->ref_reloc_sym = ref;
2006         }
2007
2008         return 0;
2009 }
2010
2011 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2012 {
2013         return machines__fprintf_dsos(&session->machines, fp);
2014 }
2015
2016 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2017                                           bool (skip)(struct dso *dso, int parm), int parm)
2018 {
2019         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2020 }
2021
2022 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
2023 {
2024         size_t ret;
2025         const char *msg = "";
2026
2027         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2028                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2029
2030         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2031
2032         ret += events_stats__fprintf(&session->evlist->stats, fp);
2033         return ret;
2034 }
2035
2036 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2037 {
2038         /*
2039          * FIXME: Here we have to actually print all the machines in this
2040          * session, not just the host...
2041          */
2042         return machine__fprintf(&session->machines.host, fp);
2043 }
2044
2045 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
2046                                               unsigned int type)
2047 {
2048         struct perf_evsel *pos;
2049
2050         evlist__for_each_entry(session->evlist, pos) {
2051                 if (pos->attr.type == type)
2052                         return pos;
2053         }
2054         return NULL;
2055 }
2056
2057 int perf_session__cpu_bitmap(struct perf_session *session,
2058                              const char *cpu_list, unsigned long *cpu_bitmap)
2059 {
2060         int i, err = -1;
2061         struct cpu_map *map;
2062
2063         for (i = 0; i < PERF_TYPE_MAX; ++i) {
2064                 struct perf_evsel *evsel;
2065
2066                 evsel = perf_session__find_first_evtype(session, i);
2067                 if (!evsel)
2068                         continue;
2069
2070                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2071                         pr_err("File does not contain CPU events. "
2072                                "Remove -C option to proceed.\n");
2073                         return -1;
2074                 }
2075         }
2076
2077         map = cpu_map__new(cpu_list);
2078         if (map == NULL) {
2079                 pr_err("Invalid cpu_list\n");
2080                 return -1;
2081         }
2082
2083         for (i = 0; i < map->nr; i++) {
2084                 int cpu = map->map[i];
2085
2086                 if (cpu >= MAX_NR_CPUS) {
2087                         pr_err("Requested CPU %d too large. "
2088                                "Consider raising MAX_NR_CPUS\n", cpu);
2089                         goto out_delete_map;
2090                 }
2091
2092                 set_bit(cpu, cpu_bitmap);
2093         }
2094
2095         err = 0;
2096
2097 out_delete_map:
2098         cpu_map__put(map);
2099         return err;
2100 }
2101
2102 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2103                                 bool full)
2104 {
2105         if (session == NULL || fp == NULL)
2106                 return;
2107
2108         fprintf(fp, "# ========\n");
2109         perf_header__fprintf_info(session, fp, full);
2110         fprintf(fp, "# ========\n#\n");
2111 }
2112
2113
2114 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2115                                              const struct perf_evsel_str_handler *assocs,
2116                                              size_t nr_assocs)
2117 {
2118         struct perf_evsel *evsel;
2119         size_t i;
2120         int err;
2121
2122         for (i = 0; i < nr_assocs; i++) {
2123                 /*
2124                  * Adding a handler for an event not in the session,
2125                  * just ignore it.
2126                  */
2127                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2128                 if (evsel == NULL)
2129                         continue;
2130
2131                 err = -EEXIST;
2132                 if (evsel->handler != NULL)
2133                         goto out;
2134                 evsel->handler = assocs[i].handler;
2135         }
2136
2137         err = 0;
2138 out:
2139         return err;
2140 }
2141
2142 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2143                                  union perf_event *event,
2144                                  struct perf_session *session)
2145 {
2146         struct perf_evlist *evlist = session->evlist;
2147         struct id_index_event *ie = &event->id_index;
2148         size_t i, nr, max_nr;
2149
2150         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2151                  sizeof(struct id_index_entry);
2152         nr = ie->nr;
2153         if (nr > max_nr)
2154                 return -EINVAL;
2155
2156         if (dump_trace)
2157                 fprintf(stdout, " nr: %zu\n", nr);
2158
2159         for (i = 0; i < nr; i++) {
2160                 struct id_index_entry *e = &ie->entries[i];
2161                 struct perf_sample_id *sid;
2162
2163                 if (dump_trace) {
2164                         fprintf(stdout, " ... id: %"PRIu64, e->id);
2165                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
2166                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
2167                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
2168                 }
2169
2170                 sid = perf_evlist__id2sid(evlist, e->id);
2171                 if (!sid)
2172                         return -ENOENT;
2173                 sid->idx = e->idx;
2174                 sid->cpu = e->cpu;
2175                 sid->tid = e->tid;
2176         }
2177         return 0;
2178 }
2179
2180 int perf_event__synthesize_id_index(struct perf_tool *tool,
2181                                     perf_event__handler_t process,
2182                                     struct perf_evlist *evlist,
2183                                     struct machine *machine)
2184 {
2185         union perf_event *ev;
2186         struct perf_evsel *evsel;
2187         size_t nr = 0, i = 0, sz, max_nr, n;
2188         int err;
2189
2190         pr_debug2("Synthesizing id index\n");
2191
2192         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2193                  sizeof(struct id_index_entry);
2194
2195         evlist__for_each_entry(evlist, evsel)
2196                 nr += evsel->ids;
2197
2198         n = nr > max_nr ? max_nr : nr;
2199         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2200         ev = zalloc(sz);
2201         if (!ev)
2202                 return -ENOMEM;
2203
2204         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2205         ev->id_index.header.size = sz;
2206         ev->id_index.nr = n;
2207
2208         evlist__for_each_entry(evlist, evsel) {
2209                 u32 j;
2210
2211                 for (j = 0; j < evsel->ids; j++) {
2212                         struct id_index_entry *e;
2213                         struct perf_sample_id *sid;
2214
2215                         if (i >= n) {
2216                                 err = process(tool, ev, NULL, machine);
2217                                 if (err)
2218                                         goto out_err;
2219                                 nr -= n;
2220                                 i = 0;
2221                         }
2222
2223                         e = &ev->id_index.entries[i++];
2224
2225                         e->id = evsel->id[j];
2226
2227                         sid = perf_evlist__id2sid(evlist, e->id);
2228                         if (!sid) {
2229                                 free(ev);
2230                                 return -ENOENT;
2231                         }
2232
2233                         e->idx = sid->idx;
2234                         e->cpu = sid->cpu;
2235                         e->tid = sid->tid;
2236                 }
2237         }
2238
2239         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2240         ev->id_index.header.size = sz;
2241         ev->id_index.nr = nr;
2242
2243         err = process(tool, ev, NULL, machine);
2244 out_err:
2245         free(ev);
2246
2247         return err;
2248 }