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 "vdso.h"
  18
  19 static int perf_session__open(struct perf_session *session)
  20 {
  21         struct perf_data_file *file = session->file;
  22
  23         if (perf_session__read_header(session) < 0) {
  24                 pr_err("incompatible file format (rerun with -v to learn more)");
  25                 return -1;
  26         }
  27
  28         if (perf_data_file__is_pipe(file))
  29                 return 0;
  30
  31         if (!perf_evlist__valid_sample_type(session->evlist)) {
  32                 pr_err("non matching sample_type");
  33                 return -1;
  34         }
  35
  36         if (!perf_evlist__valid_sample_id_all(session->evlist)) {
  37                 pr_err("non matching sample_id_all");
  38                 return -1;
  39         }
  40
  41         if (!perf_evlist__valid_read_format(session->evlist)) {
  42                 pr_err("non matching read_format");
  43                 return -1;
  44         }
  45
  46         return 0;
  47 }
  48
  49 void perf_session__set_id_hdr_size(struct perf_session *session)
  50 {
  51         u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
  52
  53         machines__set_id_hdr_size(&session->machines, id_hdr_size);
  54 }
  55
  56 int perf_session__create_kernel_maps(struct perf_session *session)
  57 {
  58         int ret = machine__create_kernel_maps(&session->machines.host);
  59
  60         if (ret >= 0)
  61                 ret = machines__create_guest_kernel_maps(&session->machines);
  62         return ret;
  63 }
  64
  65 static void perf_session__destroy_kernel_maps(struct perf_session *session)
  66 {
  67         machines__destroy_kernel_maps(&session->machines);
  68 }
  69
  70 struct perf_session *perf_session__new(struct perf_data_file *file,
  71                                        bool repipe, struct perf_tool *tool)
  72 {
  73         struct perf_session *session = zalloc(sizeof(*session));
  74
  75         if (!session)
  76                 goto out;
  77
  78         session->repipe = repipe;
  79         INIT_LIST_HEAD(&session->ordered_samples.samples);
  80         INIT_LIST_HEAD(&session->ordered_samples.sample_cache);
  81         INIT_LIST_HEAD(&session->ordered_samples.to_free);
  82         machines__init(&session->machines);
  83
  84         if (file) {
  85                 if (perf_data_file__open(file))
  86                         goto out_delete;
  87
  88                 session->file = file;
  89
  90                 if (perf_data_file__is_read(file)) {
  91                         if (perf_session__open(session) < 0)
  92                                 goto out_close;
  93
  94                         perf_session__set_id_hdr_size(session);
  95                 }
  96         }
  97
  98         if (!file || perf_data_file__is_write(file)) {
  99                 /*
 100                  * In O_RDONLY mode this will be performed when reading the
 101                  * kernel MMAP event, in perf_event__process_mmap().
 102                  */
 103                 if (perf_session__create_kernel_maps(session) < 0)
 104                         goto out_delete;
 105         }
 106
 107         if (tool && tool->ordering_requires_timestamps &&
 108             tool->ordered_samples && !perf_evlist__sample_id_all(session->evlist)) {
 109                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 110                 tool->ordered_samples = false;
 111         }
 112
 113         return session;
 114
 115  out_close:
 116         perf_data_file__close(file);
 117  out_delete:
 118         perf_session__delete(session);
 119  out:
 120         return NULL;
 121 }
 122
 123 static void perf_session__delete_dead_threads(struct perf_session *session)
 124 {
 125         machine__delete_dead_threads(&session->machines.host);
 126 }
 127
 128 static void perf_session__delete_threads(struct perf_session *session)
 129 {
 130         machine__delete_threads(&session->machines.host);
 131 }
 132
 133 static void perf_session_env__delete(struct perf_session_env *env)
 134 {
 135         zfree(&env->hostname);
 136         zfree(&env->os_release);
 137         zfree(&env->version);
 138         zfree(&env->arch);
 139         zfree(&env->cpu_desc);
 140         zfree(&env->cpuid);
 141
 142         zfree(&env->cmdline);
 143         zfree(&env->sibling_cores);
 144         zfree(&env->sibling_threads);
 145         zfree(&env->numa_nodes);
 146         zfree(&env->pmu_mappings);
 147 }
 148
 149 void perf_session__delete(struct perf_session *session)
 150 {
 151         perf_session__destroy_kernel_maps(session);
 152         perf_session__delete_dead_threads(session);
 153         perf_session__delete_threads(session);
 154         perf_session_env__delete(&session->header.env);
 155         machines__exit(&session->machines);
 156         if (session->file)
 157                 perf_data_file__close(session->file);
 158         free(session);
 159         vdso__exit();
 160 }
 161
 162 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 163                                                  __maybe_unused,
 164                                                  union perf_event *event
 165                                                  __maybe_unused,
 166                                                  struct perf_session *session
 167                                                 __maybe_unused)
 168 {
 169         dump_printf(": unhandled!\n");
 170         return 0;
 171 }
 172
 173 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 174                                          union perf_event *event __maybe_unused,
 175                                          struct perf_evlist **pevlist
 176                                          __maybe_unused)
 177 {
 178         dump_printf(": unhandled!\n");
 179         return 0;
 180 }
 181
 182 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 183                                      union perf_event *event __maybe_unused,
 184                                      struct perf_sample *sample __maybe_unused,
 185                                      struct perf_evsel *evsel __maybe_unused,
 186                                      struct machine *machine __maybe_unused)
 187 {
 188         dump_printf(": unhandled!\n");
 189         return 0;
 190 }
 191
 192 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 193                               union perf_event *event __maybe_unused,
 194                               struct perf_sample *sample __maybe_unused,
 195                               struct machine *machine __maybe_unused)
 196 {
 197         dump_printf(": unhandled!\n");
 198         return 0;
 199 }
 200
 201 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 202                                        union perf_event *event __maybe_unused,
 203                                        struct perf_session *perf_session
 204                                        __maybe_unused)
 205 {
 206         dump_printf(": unhandled!\n");
 207         return 0;
 208 }
 209
 210 static int process_finished_round(struct perf_tool *tool,
 211                                   union perf_event *event,
 212                                   struct perf_session *session);
 213
 214 void perf_tool__fill_defaults(struct perf_tool *tool)
 215 {
 216         if (tool->sample == NULL)
 217                 tool->sample = process_event_sample_stub;
 218         if (tool->mmap == NULL)
 219                 tool->mmap = process_event_stub;
 220         if (tool->mmap2 == NULL)
 221                 tool->mmap2 = process_event_stub;
 222         if (tool->comm == NULL)
 223                 tool->comm = process_event_stub;
 224         if (tool->fork == NULL)
 225                 tool->fork = process_event_stub;
 226         if (tool->exit == NULL)
 227                 tool->exit = process_event_stub;
 228         if (tool->lost == NULL)
 229                 tool->lost = perf_event__process_lost;
 230         if (tool->read == NULL)
 231                 tool->read = process_event_sample_stub;
 232         if (tool->throttle == NULL)
 233                 tool->throttle = process_event_stub;
 234         if (tool->unthrottle == NULL)
 235                 tool->unthrottle = process_event_stub;
 236         if (tool->attr == NULL)
 237                 tool->attr = process_event_synth_attr_stub;
 238         if (tool->tracing_data == NULL)
 239                 tool->tracing_data = process_event_synth_tracing_data_stub;
 240         if (tool->build_id == NULL)
 241                 tool->build_id = process_finished_round_stub;
 242         if (tool->finished_round == NULL) {
 243                 if (tool->ordered_samples)
 244                         tool->finished_round = process_finished_round;
 245                 else
 246                         tool->finished_round = process_finished_round_stub;
 247         }
 248 }
 249
 250 static void swap_sample_id_all(union perf_event *event, void *data)
 251 {
 252         void *end = (void *) event + event->header.size;
 253         int size = end - data;
 254
 255         BUG_ON(size % sizeof(u64));
 256         mem_bswap_64(data, size);
 257 }
 258
 259 static void perf_event__all64_swap(union perf_event *event,
 260                                    bool sample_id_all __maybe_unused)
 261 {
 262         struct perf_event_header *hdr = &event->header;
 263         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 264 }
 265
 266 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 267 {
 268         event->comm.pid = bswap_32(event->comm.pid);
 269         event->comm.tid = bswap_32(event->comm.tid);
 270
 271         if (sample_id_all) {
 272                 void *data = &event->comm.comm;
 273
 274                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 275                 swap_sample_id_all(event, data);
 276         }
 277 }
 278
 279 static void perf_event__mmap_swap(union perf_event *event,
 280                                   bool sample_id_all)
 281 {
 282         event->mmap.pid   = bswap_32(event->mmap.pid);
 283         event->mmap.tid   = bswap_32(event->mmap.tid);
 284         event->mmap.start = bswap_64(event->mmap.start);
 285         event->mmap.len   = bswap_64(event->mmap.len);
 286         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 287
 288         if (sample_id_all) {
 289                 void *data = &event->mmap.filename;
 290
 291                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 292                 swap_sample_id_all(event, data);
 293         }
 294 }
 295
 296 static void perf_event__mmap2_swap(union perf_event *event,
 297                                   bool sample_id_all)
 298 {
 299         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 300         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 301         event->mmap2.start = bswap_64(event->mmap2.start);
 302         event->mmap2.len   = bswap_64(event->mmap2.len);
 303         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 304         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 305         event->mmap2.min   = bswap_32(event->mmap2.min);
 306         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 307
 308         if (sample_id_all) {
 309                 void *data = &event->mmap2.filename;
 310
 311                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 312                 swap_sample_id_all(event, data);
 313         }
 314 }
 315 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 316 {
 317         event->fork.pid  = bswap_32(event->fork.pid);
 318         event->fork.tid  = bswap_32(event->fork.tid);
 319         event->fork.ppid = bswap_32(event->fork.ppid);
 320         event->fork.ptid = bswap_32(event->fork.ptid);
 321         event->fork.time = bswap_64(event->fork.time);
 322
 323         if (sample_id_all)
 324                 swap_sample_id_all(event, &event->fork + 1);
 325 }
 326
 327 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 328 {
 329         event->read.pid          = bswap_32(event->read.pid);
 330         event->read.tid          = bswap_32(event->read.tid);
 331         event->read.value        = bswap_64(event->read.value);
 332         event->read.time_enabled = bswap_64(event->read.time_enabled);
 333         event->read.time_running = bswap_64(event->read.time_running);
 334         event->read.id           = bswap_64(event->read.id);
 335
 336         if (sample_id_all)
 337                 swap_sample_id_all(event, &event->read + 1);
 338 }
 339
 340 static void perf_event__throttle_swap(union perf_event *event,
 341                                       bool sample_id_all)
 342 {
 343         event->throttle.time      = bswap_64(event->throttle.time);
 344         event->throttle.id        = bswap_64(event->throttle.id);
 345         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 346
 347         if (sample_id_all)
 348                 swap_sample_id_all(event, &event->throttle + 1);
 349 }
 350
 351 static u8 revbyte(u8 b)
 352 {
 353         int rev = (b >> 4) | ((b & 0xf) << 4);
 354         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 355         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 356         return (u8) rev;
 357 }
 358
 359 /*
 360  * XXX this is hack in attempt to carry flags bitfield
 361  * throught endian village. ABI says:
 362  *
 363  * Bit-fields are allocated from right to left (least to most significant)
 364  * on little-endian implementations and from left to right (most to least
 365  * significant) on big-endian implementations.
 366  *
 367  * The above seems to be byte specific, so we need to reverse each
 368  * byte of the bitfield. 'Internet' also says this might be implementation
 369  * specific and we probably need proper fix and carry perf_event_attr
 370  * bitfield flags in separate data file FEAT_ section. Thought this seems
 371  * to work for now.
 372  */
 373 static void swap_bitfield(u8 *p, unsigned len)
 374 {
 375         unsigned i;
 376
 377         for (i = 0; i < len; i++) {
 378                 *p = revbyte(*p);
 379                 p++;
 380         }
 381 }
 382
 383 /* exported for swapping attributes in file header */
 384 void perf_event__attr_swap(struct perf_event_attr *attr)
 385 {
 386         attr->type              = bswap_32(attr->type);
 387         attr->size              = bswap_32(attr->size);
 388         attr->config            = bswap_64(attr->config);
 389         attr->sample_period     = bswap_64(attr->sample_period);
 390         attr->sample_type       = bswap_64(attr->sample_type);
 391         attr->read_format       = bswap_64(attr->read_format);
 392         attr->wakeup_events     = bswap_32(attr->wakeup_events);
 393         attr->bp_type           = bswap_32(attr->bp_type);
 394         attr->bp_addr           = bswap_64(attr->bp_addr);
 395         attr->bp_len            = bswap_64(attr->bp_len);
 396         attr->branch_sample_type = bswap_64(attr->branch_sample_type);
 397         attr->sample_regs_user   = bswap_64(attr->sample_regs_user);
 398         attr->sample_stack_user  = bswap_32(attr->sample_stack_user);
 399
 400         swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
 401 }
 402
 403 static void perf_event__hdr_attr_swap(union perf_event *event,
 404                                       bool sample_id_all __maybe_unused)
 405 {
 406         size_t size;
 407
 408         perf_event__attr_swap(&event->attr.attr);
 409
 410         size = event->header.size;
 411         size -= (void *)&event->attr.id - (void *)event;
 412         mem_bswap_64(event->attr.id, size);
 413 }
 414
 415 static void perf_event__event_type_swap(union perf_event *event,
 416                                         bool sample_id_all __maybe_unused)
 417 {
 418         event->event_type.event_type.event_id =
 419                 bswap_64(event->event_type.event_type.event_id);
 420 }
 421
 422 static void perf_event__tracing_data_swap(union perf_event *event,
 423                                           bool sample_id_all __maybe_unused)
 424 {
 425         event->tracing_data.size = bswap_32(event->tracing_data.size);
 426 }
 427
 428 typedef void (*perf_event__swap_op)(union perf_event *event,
 429                                     bool sample_id_all);
 430
 431 static perf_event__swap_op perf_event__swap_ops[] = {
 432         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 433         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 434         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 435         [PERF_RECORD_FORK]                = perf_event__task_swap,
 436         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 437         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 438         [PERF_RECORD_READ]                = perf_event__read_swap,
 439         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 440         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 441         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 442         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 443         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 444         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 445         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 446         [PERF_RECORD_HEADER_MAX]          = NULL,
 447 };
 448
 449 struct sample_queue {
 450         u64                     timestamp;
 451         u64                     file_offset;
 452         union perf_event        *event;
 453         struct list_head        list;
 454 };
 455
 456 static void perf_session_free_sample_buffers(struct perf_session *session)
 457 {
 458         struct ordered_samples *os = &session->ordered_samples;
 459
 460         while (!list_empty(&os->to_free)) {
 461                 struct sample_queue *sq;
 462
 463                 sq = list_entry(os->to_free.next, struct sample_queue, list);
 464                 list_del(&sq->list);
 465                 free(sq);
 466         }
 467 }
 468
 469 static int perf_session_deliver_event(struct perf_session *session,
 470                                       union perf_event *event,
 471                                       struct perf_sample *sample,
 472                                       struct perf_tool *tool,
 473                                       u64 file_offset);
 474
 475 static int flush_sample_queue(struct perf_session *s,
 476                        struct perf_tool *tool)
 477 {
 478         struct ordered_samples *os = &s->ordered_samples;
 479         struct list_head *head = &os->samples;
 480         struct sample_queue *tmp, *iter;
 481         struct perf_sample sample;
 482         u64 limit = os->next_flush;
 483         u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
 484         bool show_progress = limit == ULLONG_MAX;
 485         struct ui_progress prog;
 486         int ret;
 487
 488         if (!tool->ordered_samples || !limit)
 489                 return 0;
 490
 491         if (show_progress)
 492                 ui_progress__init(&prog, os->nr_samples, "Processing time ordered events...");
 493
 494         list_for_each_entry_safe(iter, tmp, head, list) {
 495                 if (session_done())
 496                         return 0;
 497
 498                 if (iter->timestamp > limit)
 499                         break;
 500
 501                 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
 502                 if (ret)
 503                         pr_err("Can't parse sample, err = %d\n", ret);
 504                 else {
 505                         ret = perf_session_deliver_event(s, iter->event, &sample, tool,
 506                                                          iter->file_offset);
 507                         if (ret)
 508                                 return ret;
 509                 }
 510
 511                 os->last_flush = iter->timestamp;
 512                 list_del(&iter->list);
 513                 list_add(&iter->list, &os->sample_cache);
 514
 515                 if (show_progress)
 516                         ui_progress__update(&prog, 1);
 517         }
 518
 519         if (list_empty(head)) {
 520                 os->last_sample = NULL;
 521         } else if (last_ts <= limit) {
 522                 os->last_sample =
 523                         list_entry(head->prev, struct sample_queue, list);
 524         }
 525
 526         os->nr_samples = 0;
 527
 528         return 0;
 529 }
 530
 531 /*
 532  * When perf record finishes a pass on every buffers, it records this pseudo
 533  * event.
 534  * We record the max timestamp t found in the pass n.
 535  * Assuming these timestamps are monotonic across cpus, we know that if
 536  * a buffer still has events with timestamps below t, they will be all
 537  * available and then read in the pass n + 1.
 538  * Hence when we start to read the pass n + 2, we can safely flush every
 539  * events with timestamps below t.
 540  *
 541  *    ============ PASS n =================
 542  *       CPU 0         |   CPU 1
 543  *                     |
 544  *    cnt1 timestamps  |   cnt2 timestamps
 545  *          1          |         2
 546  *          2          |         3
 547  *          -          |         4  <--- max recorded
 548  *
 549  *    ============ PASS n + 1 ==============
 550  *       CPU 0         |   CPU 1
 551  *                     |
 552  *    cnt1 timestamps  |   cnt2 timestamps
 553  *          3          |         5
 554  *          4          |         6
 555  *          5          |         7 <---- max recorded
 556  *
 557  *      Flush every events below timestamp 4
 558  *
 559  *    ============ PASS n + 2 ==============
 560  *       CPU 0         |   CPU 1
 561  *                     |
 562  *    cnt1 timestamps  |   cnt2 timestamps
 563  *          6          |         8
 564  *          7          |         9
 565  *          -          |         10
 566  *
 567  *      Flush every events below timestamp 7
 568  *      etc...
 569  */
 570 static int process_finished_round(struct perf_tool *tool,
 571                                   union perf_event *event __maybe_unused,
 572                                   struct perf_session *session)
 573 {
 574         int ret = flush_sample_queue(session, tool);
 575         if (!ret)
 576                 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
 577
 578         return ret;
 579 }
 580
 581 /* The queue is ordered by time */
 582 static void __queue_event(struct sample_queue *new, struct perf_session *s)
 583 {
 584         struct ordered_samples *os = &s->ordered_samples;
 585         struct sample_queue *sample = os->last_sample;
 586         u64 timestamp = new->timestamp;
 587         struct list_head *p;
 588
 589         ++os->nr_samples;
 590         os->last_sample = new;
 591
 592         if (!sample) {
 593                 list_add(&new->list, &os->samples);
 594                 os->max_timestamp = timestamp;
 595                 return;
 596         }
 597
 598         /*
 599          * last_sample might point to some random place in the list as it's
 600          * the last queued event. We expect that the new event is close to
 601          * this.
 602          */
 603         if (sample->timestamp <= timestamp) {
 604                 while (sample->timestamp <= timestamp) {
 605                         p = sample->list.next;
 606                         if (p == &os->samples) {
 607                                 list_add_tail(&new->list, &os->samples);
 608                                 os->max_timestamp = timestamp;
 609                                 return;
 610                         }
 611                         sample = list_entry(p, struct sample_queue, list);
 612                 }
 613                 list_add_tail(&new->list, &sample->list);
 614         } else {
 615                 while (sample->timestamp > timestamp) {
 616                         p = sample->list.prev;
 617                         if (p == &os->samples) {
 618                                 list_add(&new->list, &os->samples);
 619                                 return;
 620                         }
 621                         sample = list_entry(p, struct sample_queue, list);
 622                 }
 623                 list_add(&new->list, &sample->list);
 624         }
 625 }
 626
 627 #define MAX_SAMPLE_BUFFER       (64 * 1024 / sizeof(struct sample_queue))
 628
 629 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
 630                                     struct perf_sample *sample, u64 file_offset)
 631 {
 632         struct ordered_samples *os = &s->ordered_samples;
 633         struct list_head *sc = &os->sample_cache;
 634         u64 timestamp = sample->time;
 635         struct sample_queue *new;
 636
 637         if (!timestamp || timestamp == ~0ULL)
 638                 return -ETIME;
 639
 640         if (timestamp < s->ordered_samples.last_flush) {
 641                 printf("Warning: Timestamp below last timeslice flush\n");
 642                 return -EINVAL;
 643         }
 644
 645         if (!list_empty(sc)) {
 646                 new = list_entry(sc->next, struct sample_queue, list);
 647                 list_del(&new->list);
 648         } else if (os->sample_buffer) {
 649                 new = os->sample_buffer + os->sample_buffer_idx;
 650                 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
 651                         os->sample_buffer = NULL;
 652         } else {
 653                 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
 654                 if (!os->sample_buffer)
 655                         return -ENOMEM;
 656                 list_add(&os->sample_buffer->list, &os->to_free);
 657                 os->sample_buffer_idx = 2;
 658                 new = os->sample_buffer + 1;
 659         }
 660
 661         new->timestamp = timestamp;
 662         new->file_offset = file_offset;
 663         new->event = event;
 664
 665         __queue_event(new, s);
 666
 667         return 0;
 668 }
 669
 670 static void callchain__printf(struct perf_sample *sample)
 671 {
 672         unsigned int i;
 673
 674         printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
 675
 676         for (i = 0; i < sample->callchain->nr; i++)
 677                 printf("..... %2d: %016" PRIx64 "\n",
 678                        i, sample->callchain->ips[i]);
 679 }
 680
 681 static void branch_stack__printf(struct perf_sample *sample)
 682 {
 683         uint64_t i;
 684
 685         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 686
 687         for (i = 0; i < sample->branch_stack->nr; i++)
 688                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
 689                         i, sample->branch_stack->entries[i].from,
 690                         sample->branch_stack->entries[i].to);
 691 }
 692
 693 static void regs_dump__printf(u64 mask, u64 *regs)
 694 {
 695         unsigned rid, i = 0;
 696
 697         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 698                 u64 val = regs[i++];
 699
 700                 printf(".... %-5s 0x%" PRIx64 "\n",
 701                        perf_reg_name(rid), val);
 702         }
 703 }
 704
 705 static void regs_user__printf(struct perf_sample *sample)
 706 {
 707         struct regs_dump *user_regs = &sample->user_regs;
 708
 709         if (user_regs->regs) {
 710                 u64 mask = user_regs->mask;
 711                 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
 712                 regs_dump__printf(mask, user_regs->regs);
 713         }
 714 }
 715
 716 static void stack_user__printf(struct stack_dump *dump)
 717 {
 718         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 719                dump->size, dump->offset);
 720 }
 721
 722 static void perf_session__print_tstamp(struct perf_session *session,
 723                                        union perf_event *event,
 724                                        struct perf_sample *sample)
 725 {
 726         u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
 727
 728         if (event->header.type != PERF_RECORD_SAMPLE &&
 729             !perf_evlist__sample_id_all(session->evlist)) {
 730                 fputs("-1 -1 ", stdout);
 731                 return;
 732         }
 733
 734         if ((sample_type & PERF_SAMPLE_CPU))
 735                 printf("%u ", sample->cpu);
 736
 737         if (sample_type & PERF_SAMPLE_TIME)
 738                 printf("%" PRIu64 " ", sample->time);
 739 }
 740
 741 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
 742 {
 743         printf("... sample_read:\n");
 744
 745         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
 746                 printf("...... time enabled %016" PRIx64 "\n",
 747                        sample->read.time_enabled);
 748
 749         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
 750                 printf("...... time running %016" PRIx64 "\n",
 751                        sample->read.time_running);
 752
 753         if (read_format & PERF_FORMAT_GROUP) {
 754                 u64 i;
 755
 756                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
 757
 758                 for (i = 0; i < sample->read.group.nr; i++) {
 759                         struct sample_read_value *value;
 760
 761                         value = &sample->read.group.values[i];
 762                         printf("..... id %016" PRIx64
 763                                ", value %016" PRIx64 "\n",
 764                                value->id, value->value);
 765                 }
 766         } else
 767                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
 768                         sample->read.one.id, sample->read.one.value);
 769 }
 770
 771 static void dump_event(struct perf_session *session, union perf_event *event,
 772                        u64 file_offset, struct perf_sample *sample)
 773 {
 774         if (!dump_trace)
 775                 return;
 776
 777         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 778                file_offset, event->header.size, event->header.type);
 779
 780         trace_event(event);
 781
 782         if (sample)
 783                 perf_session__print_tstamp(session, event, sample);
 784
 785         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 786                event->header.size, perf_event__name(event->header.type));
 787 }
 788
 789 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 790                         struct perf_sample *sample)
 791 {
 792         u64 sample_type;
 793
 794         if (!dump_trace)
 795                 return;
 796
 797         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 798                event->header.misc, sample->pid, sample->tid, sample->ip,
 799                sample->period, sample->addr);
 800
 801         sample_type = evsel->attr.sample_type;
 802
 803         if (sample_type & PERF_SAMPLE_CALLCHAIN)
 804                 callchain__printf(sample);
 805
 806         if (sample_type & PERF_SAMPLE_BRANCH_STACK)
 807                 branch_stack__printf(sample);
 808
 809         if (sample_type & PERF_SAMPLE_REGS_USER)
 810                 regs_user__printf(sample);
 811
 812         if (sample_type & PERF_SAMPLE_STACK_USER)
 813                 stack_user__printf(&sample->user_stack);
 814
 815         if (sample_type & PERF_SAMPLE_WEIGHT)
 816                 printf("... weight: %" PRIu64 "\n", sample->weight);
 817
 818         if (sample_type & PERF_SAMPLE_DATA_SRC)
 819                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
 820
 821         if (sample_type & PERF_SAMPLE_TRANSACTION)
 822                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
 823
 824         if (sample_type & PERF_SAMPLE_READ)
 825                 sample_read__printf(sample, evsel->attr.read_format);
 826 }
 827
 828 static struct machine *
 829         perf_session__find_machine_for_cpumode(struct perf_session *session,
 830                                                union perf_event *event,
 831                                                struct perf_sample *sample)
 832 {
 833         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 834         struct machine *machine;
 835
 836         if (perf_guest &&
 837             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
 838              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
 839                 u32 pid;
 840
 841                 if (event->header.type == PERF_RECORD_MMAP
 842                     || event->header.type == PERF_RECORD_MMAP2)
 843                         pid = event->mmap.pid;
 844                 else
 845                         pid = sample->pid;
 846
 847                 machine = perf_session__find_machine(session, pid);
 848                 if (!machine)
 849                         machine = perf_session__findnew_machine(session,
 850                                                 DEFAULT_GUEST_KERNEL_ID);
 851                 return machine;
 852         }
 853
 854         return &session->machines.host;
 855 }
 856
 857 static int deliver_sample_value(struct perf_session *session,
 858                                 struct perf_tool *tool,
 859                                 union perf_event *event,
 860                                 struct perf_sample *sample,
 861                                 struct sample_read_value *v,
 862                                 struct machine *machine)
 863 {
 864         struct perf_sample_id *sid;
 865
 866         sid = perf_evlist__id2sid(session->evlist, v->id);
 867         if (sid) {
 868                 sample->id     = v->id;
 869                 sample->period = v->value - sid->period;
 870                 sid->period    = v->value;
 871         }
 872
 873         if (!sid || sid->evsel == NULL) {
 874                 ++session->stats.nr_unknown_id;
 875                 return 0;
 876         }
 877
 878         return tool->sample(tool, event, sample, sid->evsel, machine);
 879 }
 880
 881 static int deliver_sample_group(struct perf_session *session,
 882                                 struct perf_tool *tool,
 883                                 union  perf_event *event,
 884                                 struct perf_sample *sample,
 885                                 struct machine *machine)
 886 {
 887         int ret = -EINVAL;
 888         u64 i;
 889
 890         for (i = 0; i < sample->read.group.nr; i++) {
 891                 ret = deliver_sample_value(session, tool, event, sample,
 892                                            &sample->read.group.values[i],
 893                                            machine);
 894                 if (ret)
 895                         break;
 896         }
 897
 898         return ret;
 899 }
 900
 901 static int
 902 perf_session__deliver_sample(struct perf_session *session,
 903                              struct perf_tool *tool,
 904                              union  perf_event *event,
 905                              struct perf_sample *sample,
 906                              struct perf_evsel *evsel,
 907                              struct machine *machine)
 908 {
 909         /* We know evsel != NULL. */
 910         u64 sample_type = evsel->attr.sample_type;
 911         u64 read_format = evsel->attr.read_format;
 912
 913         /* Standard sample delievery. */
 914         if (!(sample_type & PERF_SAMPLE_READ))
 915                 return tool->sample(tool, event, sample, evsel, machine);
 916
 917         /* For PERF_SAMPLE_READ we have either single or group mode. */
 918         if (read_format & PERF_FORMAT_GROUP)
 919                 return deliver_sample_group(session, tool, event, sample,
 920                                             machine);
 921         else
 922                 return deliver_sample_value(session, tool, event, sample,
 923                                             &sample->read.one, machine);
 924 }
 925
 926 static int perf_session_deliver_event(struct perf_session *session,
 927                                       union perf_event *event,
 928                                       struct perf_sample *sample,
 929                                       struct perf_tool *tool,
 930                                       u64 file_offset)
 931 {
 932         struct perf_evsel *evsel;
 933         struct machine *machine;
 934
 935         dump_event(session, event, file_offset, sample);
 936
 937         evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 938         if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
 939                 /*
 940                  * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
 941                  * because the tools right now may apply filters, discarding
 942                  * some of the samples. For consistency, in the future we
 943                  * should have something like nr_filtered_samples and remove
 944                  * the sample->period from total_sample_period, etc, KISS for
 945                  * now tho.
 946                  *
 947                  * Also testing against NULL allows us to handle files without
 948                  * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
 949                  * future probably it'll be a good idea to restrict event
 950                  * processing via perf_session to files with both set.
 951                  */
 952                 hists__inc_nr_events(&evsel->hists, event->header.type);
 953         }
 954
 955         machine = perf_session__find_machine_for_cpumode(session, event,
 956                                                          sample);
 957
 958         switch (event->header.type) {
 959         case PERF_RECORD_SAMPLE:
 960                 dump_sample(evsel, event, sample);
 961                 if (evsel == NULL) {
 962                         ++session->stats.nr_unknown_id;
 963                         return 0;
 964                 }
 965                 if (machine == NULL) {
 966                         ++session->stats.nr_unprocessable_samples;
 967                         return 0;
 968                 }
 969                 return perf_session__deliver_sample(session, tool, event,
 970                                                     sample, evsel, machine);
 971         case PERF_RECORD_MMAP:
 972                 return tool->mmap(tool, event, sample, machine);
 973         case PERF_RECORD_MMAP2:
 974                 return tool->mmap2(tool, event, sample, machine);
 975         case PERF_RECORD_COMM:
 976                 return tool->comm(tool, event, sample, machine);
 977         case PERF_RECORD_FORK:
 978                 return tool->fork(tool, event, sample, machine);
 979         case PERF_RECORD_EXIT:
 980                 return tool->exit(tool, event, sample, machine);
 981         case PERF_RECORD_LOST:
 982                 if (tool->lost == perf_event__process_lost)
 983                         session->stats.total_lost += event->lost.lost;
 984                 return tool->lost(tool, event, sample, machine);
 985         case PERF_RECORD_READ:
 986                 return tool->read(tool, event, sample, evsel, machine);
 987         case PERF_RECORD_THROTTLE:
 988                 return tool->throttle(tool, event, sample, machine);
 989         case PERF_RECORD_UNTHROTTLE:
 990                 return tool->unthrottle(tool, event, sample, machine);
 991         default:
 992                 ++session->stats.nr_unknown_events;
 993                 return -1;
 994         }
 995 }
 996
 997 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
 998                                             struct perf_tool *tool, u64 file_offset)
 999 {
1000         int fd = perf_data_file__fd(session->file);
1001         int err;
1002
1003         dump_event(session, event, file_offset, NULL);
1004
1005         /* These events are processed right away */
1006         switch (event->header.type) {
1007         case PERF_RECORD_HEADER_ATTR:
1008                 err = tool->attr(tool, event, &session->evlist);
1009                 if (err == 0)
1010                         perf_session__set_id_hdr_size(session);
1011                 return err;
1012         case PERF_RECORD_HEADER_EVENT_TYPE:
1013                 /*
1014                  * Depreceated, but we need to handle it for sake
1015                  * of old data files create in pipe mode.
1016                  */
1017                 return 0;
1018         case PERF_RECORD_HEADER_TRACING_DATA:
1019                 /* setup for reading amidst mmap */
1020                 lseek(fd, file_offset, SEEK_SET);
1021                 return tool->tracing_data(tool, event, session);
1022         case PERF_RECORD_HEADER_BUILD_ID:
1023                 return tool->build_id(tool, event, session);
1024         case PERF_RECORD_FINISHED_ROUND:
1025                 return tool->finished_round(tool, event, session);
1026         default:
1027                 return -EINVAL;
1028         }
1029 }
1030
1031 static void event_swap(union perf_event *event, bool sample_id_all)
1032 {
1033         perf_event__swap_op swap;
1034
1035         swap = perf_event__swap_ops[event->header.type];
1036         if (swap)
1037                 swap(event, sample_id_all);
1038 }
1039
1040 static int perf_session__process_event(struct perf_session *session,
1041                                        union perf_event *event,
1042                                        struct perf_tool *tool,
1043                                        u64 file_offset)
1044 {
1045         struct perf_sample sample;
1046         int ret;
1047
1048         if (session->header.needs_swap)
1049                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1050
1051         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1052                 return -EINVAL;
1053
1054         events_stats__inc(&session->stats, event->header.type);
1055
1056         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1057                 return perf_session__process_user_event(session, event, tool, file_offset);
1058
1059         /*
1060          * For all kernel events we get the sample data
1061          */
1062         ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1063         if (ret)
1064                 return ret;
1065
1066         if (tool->ordered_samples) {
1067                 ret = perf_session_queue_event(session, event, &sample,
1068                                                file_offset);
1069                 if (ret != -ETIME)
1070                         return ret;
1071         }
1072
1073         return perf_session_deliver_event(session, event, &sample, tool,
1074                                           file_offset);
1075 }
1076
1077 void perf_event_header__bswap(struct perf_event_header *hdr)
1078 {
1079         hdr->type = bswap_32(hdr->type);
1080         hdr->misc = bswap_16(hdr->misc);
1081         hdr->size = bswap_16(hdr->size);
1082 }
1083
1084 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1085 {
1086         return machine__findnew_thread(&session->machines.host, 0, pid);
1087 }
1088
1089 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1090 {
1091         struct thread *thread = perf_session__findnew(session, 0);
1092
1093         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1094                 pr_err("problem inserting idle task.\n");
1095                 thread = NULL;
1096         }
1097
1098         return thread;
1099 }
1100
1101 static void perf_session__warn_about_errors(const struct perf_session *session,
1102                                             const struct perf_tool *tool)
1103 {
1104         if (tool->lost == perf_event__process_lost &&
1105             session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1106                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1107                             "Check IO/CPU overload!\n\n",
1108                             session->stats.nr_events[0],
1109                             session->stats.nr_events[PERF_RECORD_LOST]);
1110         }
1111
1112         if (session->stats.nr_unknown_events != 0) {
1113                 ui__warning("Found %u unknown events!\n\n"
1114                             "Is this an older tool processing a perf.data "
1115                             "file generated by a more recent tool?\n\n"
1116                             "If that is not the case, consider "
1117                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1118                             session->stats.nr_unknown_events);
1119         }
1120
1121         if (session->stats.nr_unknown_id != 0) {
1122                 ui__warning("%u samples with id not present in the header\n",
1123                             session->stats.nr_unknown_id);
1124         }
1125
1126         if (session->stats.nr_invalid_chains != 0) {
1127                 ui__warning("Found invalid callchains!\n\n"
1128                             "%u out of %u events were discarded for this reason.\n\n"
1129                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1130                             session->stats.nr_invalid_chains,
1131                             session->stats.nr_events[PERF_RECORD_SAMPLE]);
1132         }
1133
1134         if (session->stats.nr_unprocessable_samples != 0) {
1135                 ui__warning("%u unprocessable samples recorded.\n"
1136                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1137                             session->stats.nr_unprocessable_samples);
1138         }
1139 }
1140
1141 volatile int session_done;
1142
1143 static int __perf_session__process_pipe_events(struct perf_session *session,
1144                                                struct perf_tool *tool)
1145 {
1146         int fd = perf_data_file__fd(session->file);
1147         union perf_event *event;
1148         uint32_t size, cur_size = 0;
1149         void *buf = NULL;
1150         int skip = 0;
1151         u64 head;
1152         ssize_t err;
1153         void *p;
1154
1155         perf_tool__fill_defaults(tool);
1156
1157         head = 0;
1158         cur_size = sizeof(union perf_event);
1159
1160         buf = malloc(cur_size);
1161         if (!buf)
1162                 return -errno;
1163 more:
1164         event = buf;
1165         err = readn(fd, event, sizeof(struct perf_event_header));
1166         if (err <= 0) {
1167                 if (err == 0)
1168                         goto done;
1169
1170                 pr_err("failed to read event header\n");
1171                 goto out_err;
1172         }
1173
1174         if (session->header.needs_swap)
1175                 perf_event_header__bswap(&event->header);
1176
1177         size = event->header.size;
1178         if (size < sizeof(struct perf_event_header)) {
1179                 pr_err("bad event header size\n");
1180                 goto out_err;
1181         }
1182
1183         if (size > cur_size) {
1184                 void *new = realloc(buf, size);
1185                 if (!new) {
1186                         pr_err("failed to allocate memory to read event\n");
1187                         goto out_err;
1188                 }
1189                 buf = new;
1190                 cur_size = size;
1191                 event = buf;
1192         }
1193         p = event;
1194         p += sizeof(struct perf_event_header);
1195
1196         if (size - sizeof(struct perf_event_header)) {
1197                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1198                 if (err <= 0) {
1199                         if (err == 0) {
1200                                 pr_err("unexpected end of event stream\n");
1201                                 goto done;
1202                         }
1203
1204                         pr_err("failed to read event data\n");
1205                         goto out_err;
1206                 }
1207         }
1208
1209         if ((skip = perf_session__process_event(session, event, tool, head)) < 0) {
1210                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1211                        head, event->header.size, event->header.type);
1212                 err = -EINVAL;
1213                 goto out_err;
1214         }
1215
1216         head += size;
1217
1218         if (skip > 0)
1219                 head += skip;
1220
1221         if (!session_done())
1222                 goto more;
1223 done:
1224         /* do the final flush for ordered samples */
1225         session->ordered_samples.next_flush = ULLONG_MAX;
1226         err = flush_sample_queue(session, tool);
1227 out_err:
1228         free(buf);
1229         perf_session__warn_about_errors(session, tool);
1230         perf_session_free_sample_buffers(session);
1231         return err;
1232 }
1233
1234 static union perf_event *
1235 fetch_mmaped_event(struct perf_session *session,
1236                    u64 head, size_t mmap_size, char *buf)
1237 {
1238         union perf_event *event;
1239
1240         /*
1241          * Ensure we have enough space remaining to read
1242          * the size of the event in the headers.
1243          */
1244         if (head + sizeof(event->header) > mmap_size)
1245                 return NULL;
1246
1247         event = (union perf_event *)(buf + head);
1248
1249         if (session->header.needs_swap)
1250                 perf_event_header__bswap(&event->header);
1251
1252         if (head + event->header.size > mmap_size) {
1253                 /* We're not fetching the event so swap back again */
1254                 if (session->header.needs_swap)
1255                         perf_event_header__bswap(&event->header);
1256                 return NULL;
1257         }
1258
1259         return event;
1260 }
1261
1262 /*
1263  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1264  * slices. On 32bit we use 32MB.
1265  */
1266 #if BITS_PER_LONG == 64
1267 #define MMAP_SIZE ULLONG_MAX
1268 #define NUM_MMAPS 1
1269 #else
1270 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1271 #define NUM_MMAPS 128
1272 #endif
1273
1274 int __perf_session__process_events(struct perf_session *session,
1275                                    u64 data_offset, u64 data_size,
1276                                    u64 file_size, struct perf_tool *tool)
1277 {
1278         int fd = perf_data_file__fd(session->file);
1279         u64 head, page_offset, file_offset, file_pos;
1280         int err, mmap_prot, mmap_flags, map_idx = 0;
1281         size_t  mmap_size;
1282         char *buf, *mmaps[NUM_MMAPS];
1283         union perf_event *event;
1284         uint32_t size;
1285         struct ui_progress prog;
1286
1287         perf_tool__fill_defaults(tool);
1288
1289         page_offset = page_size * (data_offset / page_size);
1290         file_offset = page_offset;
1291         head = data_offset - page_offset;
1292
1293         if (data_size && (data_offset + data_size < file_size))
1294                 file_size = data_offset + data_size;
1295
1296         ui_progress__init(&prog, file_size, "Processing events...");
1297
1298         mmap_size = MMAP_SIZE;
1299         if (mmap_size > file_size)
1300                 mmap_size = file_size;
1301
1302         memset(mmaps, 0, sizeof(mmaps));
1303
1304         mmap_prot  = PROT_READ;
1305         mmap_flags = MAP_SHARED;
1306
1307         if (session->header.needs_swap) {
1308                 mmap_prot  |= PROT_WRITE;
1309                 mmap_flags = MAP_PRIVATE;
1310         }
1311 remap:
1312         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1313                    file_offset);
1314         if (buf == MAP_FAILED) {
1315                 pr_err("failed to mmap file\n");
1316                 err = -errno;
1317                 goto out_err;
1318         }
1319         mmaps[map_idx] = buf;
1320         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1321         file_pos = file_offset + head;
1322
1323 more:
1324         event = fetch_mmaped_event(session, head, mmap_size, buf);
1325         if (!event) {
1326                 if (mmaps[map_idx]) {
1327                         munmap(mmaps[map_idx], mmap_size);
1328                         mmaps[map_idx] = NULL;
1329                 }
1330
1331                 page_offset = page_size * (head / page_size);
1332                 file_offset += page_offset;
1333                 head -= page_offset;
1334                 goto remap;
1335         }
1336
1337         size = event->header.size;
1338
1339         if (size < sizeof(struct perf_event_header) ||
1340             perf_session__process_event(session, event, tool, file_pos) < 0) {
1341                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1342                        file_offset + head, event->header.size,
1343                        event->header.type);
1344                 err = -EINVAL;
1345                 goto out_err;
1346         }
1347
1348         head += size;
1349         file_pos += size;
1350
1351         ui_progress__update(&prog, size);
1352
1353         if (session_done())
1354                 goto out;
1355
1356         if (file_pos < file_size)
1357                 goto more;
1358
1359 out:
1360         /* do the final flush for ordered samples */
1361         session->ordered_samples.next_flush = ULLONG_MAX;
1362         err = flush_sample_queue(session, tool);
1363 out_err:
1364         ui_progress__finish();
1365         perf_session__warn_about_errors(session, tool);
1366         perf_session_free_sample_buffers(session);
1367         return err;
1368 }
1369
1370 int perf_session__process_events(struct perf_session *session,
1371                                  struct perf_tool *tool)
1372 {
1373         u64 size = perf_data_file__size(session->file);
1374         int err;
1375
1376         if (perf_session__register_idle_thread(session) == NULL)
1377                 return -ENOMEM;
1378
1379         if (!perf_data_file__is_pipe(session->file))
1380                 err = __perf_session__process_events(session,
1381                                                      session->header.data_offset,
1382                                                      session->header.data_size,
1383                                                      size, tool);
1384         else
1385                 err = __perf_session__process_pipe_events(session, tool);
1386
1387         return err;
1388 }
1389
1390 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1391 {
1392         struct perf_evsel *evsel;
1393
1394         evlist__for_each(session->evlist, evsel) {
1395                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1396                         return true;
1397         }
1398
1399         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1400         return false;
1401 }
1402
1403 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1404                                      const char *symbol_name, u64 addr)
1405 {
1406         char *bracket;
1407         enum map_type i;
1408         struct ref_reloc_sym *ref;
1409
1410         ref = zalloc(sizeof(struct ref_reloc_sym));
1411         if (ref == NULL)
1412                 return -ENOMEM;
1413
1414         ref->name = strdup(symbol_name);
1415         if (ref->name == NULL) {
1416                 free(ref);
1417                 return -ENOMEM;
1418         }
1419
1420         bracket = strchr(ref->name, ']');
1421         if (bracket)
1422                 *bracket = '\0';
1423
1424         ref->addr = addr;
1425
1426         for (i = 0; i < MAP__NR_TYPES; ++i) {
1427                 struct kmap *kmap = map__kmap(maps[i]);
1428                 kmap->ref_reloc_sym = ref;
1429         }
1430
1431         return 0;
1432 }
1433
1434 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1435 {
1436         return machines__fprintf_dsos(&session->machines, fp);
1437 }
1438
1439 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1440                                           bool (skip)(struct dso *dso, int parm), int parm)
1441 {
1442         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1443 }
1444
1445 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1446 {
1447         struct perf_evsel *pos;
1448         size_t ret = fprintf(fp, "Aggregated stats:\n");
1449
1450         ret += events_stats__fprintf(&session->stats, fp);
1451
1452         evlist__for_each(session->evlist, pos) {
1453                 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1454                 ret += events_stats__fprintf(&pos->hists.stats, fp);
1455         }
1456
1457         return ret;
1458 }
1459
1460 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1461 {
1462         /*
1463          * FIXME: Here we have to actually print all the machines in this
1464          * session, not just the host...
1465          */
1466         return machine__fprintf(&session->machines.host, fp);
1467 }
1468
1469 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1470                                               unsigned int type)
1471 {
1472         struct perf_evsel *pos;
1473
1474         evlist__for_each(session->evlist, pos) {
1475                 if (pos->attr.type == type)
1476                         return pos;
1477         }
1478         return NULL;
1479 }
1480
1481 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1482                           struct addr_location *al,
1483                           unsigned int print_opts, unsigned int stack_depth)
1484 {
1485         struct callchain_cursor_node *node;
1486         int print_ip = print_opts & PRINT_IP_OPT_IP;
1487         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1488         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1489         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1490         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1491         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1492         char s = print_oneline ? ' ' : '\t';
1493
1494         if (symbol_conf.use_callchain && sample->callchain) {
1495                 struct addr_location node_al;
1496
1497                 if (machine__resolve_callchain(al->machine, evsel, al->thread,
1498                                                sample, NULL, NULL,
1499                                                PERF_MAX_STACK_DEPTH) != 0) {
1500                         if (verbose)
1501                                 error("Failed to resolve callchain. Skipping\n");
1502                         return;
1503                 }
1504                 callchain_cursor_commit(&callchain_cursor);
1505
1506                 if (print_symoffset)
1507                         node_al = *al;
1508
1509                 while (stack_depth) {
1510                         u64 addr = 0;
1511
1512                         node = callchain_cursor_current(&callchain_cursor);
1513                         if (!node)
1514                                 break;
1515
1516                         if (node->sym && node->sym->ignore)
1517                                 goto next;
1518
1519                         if (print_ip)
1520                                 printf("%c%16" PRIx64, s, node->ip);
1521
1522                         if (node->map)
1523                                 addr = node->map->map_ip(node->map, node->ip);
1524
1525                         if (print_sym) {
1526                                 printf(" ");
1527                                 if (print_symoffset) {
1528                                         node_al.addr = addr;
1529                                         node_al.map  = node->map;
1530                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1531                                 } else
1532                                         symbol__fprintf_symname(node->sym, stdout);
1533                         }
1534
1535                         if (print_dso) {
1536                                 printf(" (");
1537                                 map__fprintf_dsoname(node->map, stdout);
1538                                 printf(")");
1539                         }
1540
1541                         if (print_srcline)
1542                                 map__fprintf_srcline(node->map, addr, "\n  ",
1543                                                      stdout);
1544
1545                         if (!print_oneline)
1546                                 printf("\n");
1547
1548                         stack_depth--;
1549 next:
1550                         callchain_cursor_advance(&callchain_cursor);
1551                 }
1552
1553         } else {
1554                 if (al->sym && al->sym->ignore)
1555                         return;
1556
1557                 if (print_ip)
1558                         printf("%16" PRIx64, sample->ip);
1559
1560                 if (print_sym) {
1561                         printf(" ");
1562                         if (print_symoffset)
1563                                 symbol__fprintf_symname_offs(al->sym, al,
1564                                                              stdout);
1565                         else
1566                                 symbol__fprintf_symname(al->sym, stdout);
1567                 }
1568
1569                 if (print_dso) {
1570                         printf(" (");
1571                         map__fprintf_dsoname(al->map, stdout);
1572                         printf(")");
1573                 }
1574
1575                 if (print_srcline)
1576                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
1577         }
1578 }
1579
1580 int perf_session__cpu_bitmap(struct perf_session *session,
1581                              const char *cpu_list, unsigned long *cpu_bitmap)
1582 {
1583         int i, err = -1;
1584         struct cpu_map *map;
1585
1586         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1587                 struct perf_evsel *evsel;
1588
1589                 evsel = perf_session__find_first_evtype(session, i);
1590                 if (!evsel)
1591                         continue;
1592
1593                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1594                         pr_err("File does not contain CPU events. "
1595                                "Remove -c option to proceed.\n");
1596                         return -1;
1597                 }
1598         }
1599
1600         map = cpu_map__new(cpu_list);
1601         if (map == NULL) {
1602                 pr_err("Invalid cpu_list\n");
1603                 return -1;
1604         }
1605
1606         for (i = 0; i < map->nr; i++) {
1607                 int cpu = map->map[i];
1608
1609                 if (cpu >= MAX_NR_CPUS) {
1610                         pr_err("Requested CPU %d too large. "
1611                                "Consider raising MAX_NR_CPUS\n", cpu);
1612                         goto out_delete_map;
1613                 }
1614
1615                 set_bit(cpu, cpu_bitmap);
1616         }
1617
1618         err = 0;
1619
1620 out_delete_map:
1621         cpu_map__delete(map);
1622         return err;
1623 }
1624
1625 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1626                                 bool full)
1627 {
1628         int fd = perf_data_file__fd(session->file);
1629         struct stat st;
1630         int ret;
1631
1632         if (session == NULL || fp == NULL)
1633                 return;
1634
1635         ret = fstat(fd, &st);
1636         if (ret == -1)
1637                 return;
1638
1639         fprintf(fp, "# ========\n");
1640         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1641         perf_header__fprintf_info(session, fp, full);
1642         fprintf(fp, "# ========\n#\n");
1643 }
1644
1645
1646 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1647                                              const struct perf_evsel_str_handler *assocs,
1648                                              size_t nr_assocs)
1649 {
1650         struct perf_evsel *evsel;
1651         size_t i;
1652         int err;
1653
1654         for (i = 0; i < nr_assocs; i++) {
1655                 /*
1656                  * Adding a handler for an event not in the session,
1657                  * just ignore it.
1658                  */
1659                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1660                 if (evsel == NULL)
1661                         continue;
1662
1663                 err = -EEXIST;
1664                 if (evsel->handler != NULL)
1665                         goto out;
1666                 evsel->handler = assocs[i].handler;
1667         }
1668
1669         err = 0;
1670 out:
1671         return err;
1672 }