Pileus Git - ~andy/linux/blob - 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         free(env->hostname);
 136         free(env->os_release);
 137         free(env->version);
 138         free(env->arch);
 139         free(env->cpu_desc);
 140         free(env->cpuid);
 141
 142         free(env->cmdline);
 143         free(env->sibling_cores);
 144         free(env->sibling_threads);
 145         free(env->numa_nodes);
 146         free(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 void mem_bswap_32(void *src, int byte_size)
 251 {
 252         u32 *m = src;
 253         while (byte_size > 0) {
 254                 *m = bswap_32(*m);
 255                 byte_size -= sizeof(u32);
 256                 ++m;
 257         }
 258 }
 259
 260 void mem_bswap_64(void *src, int byte_size)
 261 {
 262         u64 *m = src;
 263
 264         while (byte_size > 0) {
 265                 *m = bswap_64(*m);
 266                 byte_size -= sizeof(u64);
 267                 ++m;
 268         }
 269 }
 270
 271 static void swap_sample_id_all(union perf_event *event, void *data)
 272 {
 273         void *end = (void *) event + event->header.size;
 274         int size = end - data;
 275
 276         BUG_ON(size % sizeof(u64));
 277         mem_bswap_64(data, size);
 278 }
 279
 280 static void perf_event__all64_swap(union perf_event *event,
 281                                    bool sample_id_all __maybe_unused)
 282 {
 283         struct perf_event_header *hdr = &event->header;
 284         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 285 }
 286
 287 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 288 {
 289         event->comm.pid = bswap_32(event->comm.pid);
 290         event->comm.tid = bswap_32(event->comm.tid);
 291
 292         if (sample_id_all) {
 293                 void *data = &event->comm.comm;
 294
 295                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 296                 swap_sample_id_all(event, data);
 297         }
 298 }
 299
 300 static void perf_event__mmap_swap(union perf_event *event,
 301                                   bool sample_id_all)
 302 {
 303         event->mmap.pid   = bswap_32(event->mmap.pid);
 304         event->mmap.tid   = bswap_32(event->mmap.tid);
 305         event->mmap.start = bswap_64(event->mmap.start);
 306         event->mmap.len   = bswap_64(event->mmap.len);
 307         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 308
 309         if (sample_id_all) {
 310                 void *data = &event->mmap.filename;
 311
 312                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 313                 swap_sample_id_all(event, data);
 314         }
 315 }
 316
 317 static void perf_event__mmap2_swap(union perf_event *event,
 318                                   bool sample_id_all)
 319 {
 320         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 321         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 322         event->mmap2.start = bswap_64(event->mmap2.start);
 323         event->mmap2.len   = bswap_64(event->mmap2.len);
 324         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 325         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 326         event->mmap2.min   = bswap_32(event->mmap2.min);
 327         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 328
 329         if (sample_id_all) {
 330                 void *data = &event->mmap2.filename;
 331
 332                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 333                 swap_sample_id_all(event, data);
 334         }
 335 }
 336 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 337 {
 338         event->fork.pid  = bswap_32(event->fork.pid);
 339         event->fork.tid  = bswap_32(event->fork.tid);
 340         event->fork.ppid = bswap_32(event->fork.ppid);
 341         event->fork.ptid = bswap_32(event->fork.ptid);
 342         event->fork.time = bswap_64(event->fork.time);
 343
 344         if (sample_id_all)
 345                 swap_sample_id_all(event, &event->fork + 1);
 346 }
 347
 348 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 349 {
 350         event->read.pid          = bswap_32(event->read.pid);
 351         event->read.tid          = bswap_32(event->read.tid);
 352         event->read.value        = bswap_64(event->read.value);
 353         event->read.time_enabled = bswap_64(event->read.time_enabled);
 354         event->read.time_running = bswap_64(event->read.time_running);
 355         event->read.id           = bswap_64(event->read.id);
 356
 357         if (sample_id_all)
 358                 swap_sample_id_all(event, &event->read + 1);
 359 }
 360
 361 static void perf_event__throttle_swap(union perf_event *event,
 362                                       bool sample_id_all)
 363 {
 364         event->throttle.time      = bswap_64(event->throttle.time);
 365         event->throttle.id        = bswap_64(event->throttle.id);
 366         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 367
 368         if (sample_id_all)
 369                 swap_sample_id_all(event, &event->throttle + 1);
 370 }
 371
 372 static u8 revbyte(u8 b)
 373 {
 374         int rev = (b >> 4) | ((b & 0xf) << 4);
 375         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 376         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 377         return (u8) rev;
 378 }
 379
 380 /*
 381  * XXX this is hack in attempt to carry flags bitfield
 382  * throught endian village. ABI says:
 383  *
 384  * Bit-fields are allocated from right to left (least to most significant)
 385  * on little-endian implementations and from left to right (most to least
 386  * significant) on big-endian implementations.
 387  *
 388  * The above seems to be byte specific, so we need to reverse each
 389  * byte of the bitfield. 'Internet' also says this might be implementation
 390  * specific and we probably need proper fix and carry perf_event_attr
 391  * bitfield flags in separate data file FEAT_ section. Thought this seems
 392  * to work for now.
 393  */
 394 static void swap_bitfield(u8 *p, unsigned len)
 395 {
 396         unsigned i;
 397
 398         for (i = 0; i < len; i++) {
 399                 *p = revbyte(*p);
 400                 p++;
 401         }
 402 }
 403
 404 /* exported for swapping attributes in file header */
 405 void perf_event__attr_swap(struct perf_event_attr *attr)
 406 {
 407         attr->type              = bswap_32(attr->type);
 408         attr->size              = bswap_32(attr->size);
 409         attr->config            = bswap_64(attr->config);
 410         attr->sample_period     = bswap_64(attr->sample_period);
 411         attr->sample_type       = bswap_64(attr->sample_type);
 412         attr->read_format       = bswap_64(attr->read_format);
 413         attr->wakeup_events     = bswap_32(attr->wakeup_events);
 414         attr->bp_type           = bswap_32(attr->bp_type);
 415         attr->bp_addr           = bswap_64(attr->bp_addr);
 416         attr->bp_len            = bswap_64(attr->bp_len);
 417         attr->branch_sample_type = bswap_64(attr->branch_sample_type);
 418         attr->sample_regs_user   = bswap_64(attr->sample_regs_user);
 419         attr->sample_stack_user  = bswap_32(attr->sample_stack_user);
 420
 421         swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
 422 }
 423
 424 static void perf_event__hdr_attr_swap(union perf_event *event,
 425                                       bool sample_id_all __maybe_unused)
 426 {
 427         size_t size;
 428
 429         perf_event__attr_swap(&event->attr.attr);
 430
 431         size = event->header.size;
 432         size -= (void *)&event->attr.id - (void *)event;
 433         mem_bswap_64(event->attr.id, size);
 434 }
 435
 436 static void perf_event__event_type_swap(union perf_event *event,
 437                                         bool sample_id_all __maybe_unused)
 438 {
 439         event->event_type.event_type.event_id =
 440                 bswap_64(event->event_type.event_type.event_id);
 441 }
 442
 443 static void perf_event__tracing_data_swap(union perf_event *event,
 444                                           bool sample_id_all __maybe_unused)
 445 {
 446         event->tracing_data.size = bswap_32(event->tracing_data.size);
 447 }
 448
 449 typedef void (*perf_event__swap_op)(union perf_event *event,
 450                                     bool sample_id_all);
 451
 452 static perf_event__swap_op perf_event__swap_ops[] = {
 453         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 454         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 455         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 456         [PERF_RECORD_FORK]                = perf_event__task_swap,
 457         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 458         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 459         [PERF_RECORD_READ]                = perf_event__read_swap,
 460         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 461         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 462         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 463         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 464         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 465         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 466         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 467         [PERF_RECORD_HEADER_MAX]          = NULL,
 468 };
 469
 470 struct sample_queue {
 471         u64                     timestamp;
 472         u64                     file_offset;
 473         union perf_event        *event;
 474         struct list_head        list;
 475 };
 476
 477 static void perf_session_free_sample_buffers(struct perf_session *session)
 478 {
 479         struct ordered_samples *os = &session->ordered_samples;
 480
 481         while (!list_empty(&os->to_free)) {
 482                 struct sample_queue *sq;
 483
 484                 sq = list_entry(os->to_free.next, struct sample_queue, list);
 485                 list_del(&sq->list);
 486                 free(sq);
 487         }
 488 }
 489
 490 static int perf_session_deliver_event(struct perf_session *session,
 491                                       union perf_event *event,
 492                                       struct perf_sample *sample,
 493                                       struct perf_tool *tool,
 494                                       u64 file_offset);
 495
 496 static int flush_sample_queue(struct perf_session *s,
 497                        struct perf_tool *tool)
 498 {
 499         struct ordered_samples *os = &s->ordered_samples;
 500         struct list_head *head = &os->samples;
 501         struct sample_queue *tmp, *iter;
 502         struct perf_sample sample;
 503         u64 limit = os->next_flush;
 504         u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
 505         bool show_progress = limit == ULLONG_MAX;
 506         struct ui_progress prog;
 507         int ret;
 508
 509         if (!tool->ordered_samples || !limit)
 510                 return 0;
 511
 512         if (show_progress)
 513                 ui_progress__init(&prog, os->nr_samples, "Processing time ordered events...");
 514
 515         list_for_each_entry_safe(iter, tmp, head, list) {
 516                 if (session_done())
 517                         return 0;
 518
 519                 if (iter->timestamp > limit)
 520                         break;
 521
 522                 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
 523                 if (ret)
 524                         pr_err("Can't parse sample, err = %d\n", ret);
 525                 else {
 526                         ret = perf_session_deliver_event(s, iter->event, &sample, tool,
 527                                                          iter->file_offset);
 528                         if (ret)
 529                                 return ret;
 530                 }
 531
 532                 os->last_flush = iter->timestamp;
 533                 list_del(&iter->list);
 534                 list_add(&iter->list, &os->sample_cache);
 535
 536                 if (show_progress)
 537                         ui_progress__update(&prog, 1);
 538         }
 539
 540         if (list_empty(head)) {
 541                 os->last_sample = NULL;
 542         } else if (last_ts <= limit) {
 543                 os->last_sample =
 544                         list_entry(head->prev, struct sample_queue, list);
 545         }
 546
 547         os->nr_samples = 0;
 548
 549         return 0;
 550 }
 551
 552 /*
 553  * When perf record finishes a pass on every buffers, it records this pseudo
 554  * event.
 555  * We record the max timestamp t found in the pass n.
 556  * Assuming these timestamps are monotonic across cpus, we know that if
 557  * a buffer still has events with timestamps below t, they will be all
 558  * available and then read in the pass n + 1.
 559  * Hence when we start to read the pass n + 2, we can safely flush every
 560  * events with timestamps below t.
 561  *
 562  *    ============ PASS n =================
 563  *       CPU 0         |   CPU 1
 564  *                     |
 565  *    cnt1 timestamps  |   cnt2 timestamps
 566  *          1          |         2
 567  *          2          |         3
 568  *          -          |         4  <--- max recorded
 569  *
 570  *    ============ PASS n + 1 ==============
 571  *       CPU 0         |   CPU 1
 572  *                     |
 573  *    cnt1 timestamps  |   cnt2 timestamps
 574  *          3          |         5
 575  *          4          |         6
 576  *          5          |         7 <---- max recorded
 577  *
 578  *      Flush every events below timestamp 4
 579  *
 580  *    ============ PASS n + 2 ==============
 581  *       CPU 0         |   CPU 1
 582  *                     |
 583  *    cnt1 timestamps  |   cnt2 timestamps
 584  *          6          |         8
 585  *          7          |         9
 586  *          -          |         10
 587  *
 588  *      Flush every events below timestamp 7
 589  *      etc...
 590  */
 591 static int process_finished_round(struct perf_tool *tool,
 592                                   union perf_event *event __maybe_unused,
 593                                   struct perf_session *session)
 594 {
 595         int ret = flush_sample_queue(session, tool);
 596         if (!ret)
 597                 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
 598
 599         return ret;
 600 }
 601
 602 /* The queue is ordered by time */
 603 static void __queue_event(struct sample_queue *new, struct perf_session *s)
 604 {
 605         struct ordered_samples *os = &s->ordered_samples;
 606         struct sample_queue *sample = os->last_sample;
 607         u64 timestamp = new->timestamp;
 608         struct list_head *p;
 609
 610         ++os->nr_samples;
 611         os->last_sample = new;
 612
 613         if (!sample) {
 614                 list_add(&new->list, &os->samples);
 615                 os->max_timestamp = timestamp;
 616                 return;
 617         }
 618
 619         /*
 620          * last_sample might point to some random place in the list as it's
 621          * the last queued event. We expect that the new event is close to
 622          * this.
 623          */
 624         if (sample->timestamp <= timestamp) {
 625                 while (sample->timestamp <= timestamp) {
 626                         p = sample->list.next;
 627                         if (p == &os->samples) {
 628                                 list_add_tail(&new->list, &os->samples);
 629                                 os->max_timestamp = timestamp;
 630                                 return;
 631                         }
 632                         sample = list_entry(p, struct sample_queue, list);
 633                 }
 634                 list_add_tail(&new->list, &sample->list);
 635         } else {
 636                 while (sample->timestamp > timestamp) {
 637                         p = sample->list.prev;
 638                         if (p == &os->samples) {
 639                                 list_add(&new->list, &os->samples);
 640                                 return;
 641                         }
 642                         sample = list_entry(p, struct sample_queue, list);
 643                 }
 644                 list_add(&new->list, &sample->list);
 645         }
 646 }
 647
 648 #define MAX_SAMPLE_BUFFER       (64 * 1024 / sizeof(struct sample_queue))
 649
 650 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
 651                                     struct perf_sample *sample, u64 file_offset)
 652 {
 653         struct ordered_samples *os = &s->ordered_samples;
 654         struct list_head *sc = &os->sample_cache;
 655         u64 timestamp = sample->time;
 656         struct sample_queue *new;
 657
 658         if (!timestamp || timestamp == ~0ULL)
 659                 return -ETIME;
 660
 661         if (timestamp < s->ordered_samples.last_flush) {
 662                 printf("Warning: Timestamp below last timeslice flush\n");
 663                 return -EINVAL;
 664         }
 665
 666         if (!list_empty(sc)) {
 667                 new = list_entry(sc->next, struct sample_queue, list);
 668                 list_del(&new->list);
 669         } else if (os->sample_buffer) {
 670                 new = os->sample_buffer + os->sample_buffer_idx;
 671                 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
 672                         os->sample_buffer = NULL;
 673         } else {
 674                 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
 675                 if (!os->sample_buffer)
 676                         return -ENOMEM;
 677                 list_add(&os->sample_buffer->list, &os->to_free);
 678                 os->sample_buffer_idx = 2;
 679                 new = os->sample_buffer + 1;
 680         }
 681
 682         new->timestamp = timestamp;
 683         new->file_offset = file_offset;
 684         new->event = event;
 685
 686         __queue_event(new, s);
 687
 688         return 0;
 689 }
 690
 691 static void callchain__printf(struct perf_sample *sample)
 692 {
 693         unsigned int i;
 694
 695         printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
 696
 697         for (i = 0; i < sample->callchain->nr; i++)
 698                 printf("..... %2d: %016" PRIx64 "\n",
 699                        i, sample->callchain->ips[i]);
 700 }
 701
 702 static void branch_stack__printf(struct perf_sample *sample)
 703 {
 704         uint64_t i;
 705
 706         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 707
 708         for (i = 0; i < sample->branch_stack->nr; i++)
 709                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
 710                         i, sample->branch_stack->entries[i].from,
 711                         sample->branch_stack->entries[i].to);
 712 }
 713
 714 static void regs_dump__printf(u64 mask, u64 *regs)
 715 {
 716         unsigned rid, i = 0;
 717
 718         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 719                 u64 val = regs[i++];
 720
 721                 printf(".... %-5s 0x%" PRIx64 "\n",
 722                        perf_reg_name(rid), val);
 723         }
 724 }
 725
 726 static void regs_user__printf(struct perf_sample *sample, u64 mask)
 727 {
 728         struct regs_dump *user_regs = &sample->user_regs;
 729
 730         if (user_regs->regs) {
 731                 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
 732                 regs_dump__printf(mask, user_regs->regs);
 733         }
 734 }
 735
 736 static void stack_user__printf(struct stack_dump *dump)
 737 {
 738         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 739                dump->size, dump->offset);
 740 }
 741
 742 static void perf_session__print_tstamp(struct perf_session *session,
 743                                        union perf_event *event,
 744                                        struct perf_sample *sample)
 745 {
 746         u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
 747
 748         if (event->header.type != PERF_RECORD_SAMPLE &&
 749             !perf_evlist__sample_id_all(session->evlist)) {
 750                 fputs("-1 -1 ", stdout);
 751                 return;
 752         }
 753
 754         if ((sample_type & PERF_SAMPLE_CPU))
 755                 printf("%u ", sample->cpu);
 756
 757         if (sample_type & PERF_SAMPLE_TIME)
 758                 printf("%" PRIu64 " ", sample->time);
 759 }
 760
 761 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
 762 {
 763         printf("... sample_read:\n");
 764
 765         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
 766                 printf("...... time enabled %016" PRIx64 "\n",
 767                        sample->read.time_enabled);
 768
 769         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
 770                 printf("...... time running %016" PRIx64 "\n",
 771                        sample->read.time_running);
 772
 773         if (read_format & PERF_FORMAT_GROUP) {
 774                 u64 i;
 775
 776                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
 777
 778                 for (i = 0; i < sample->read.group.nr; i++) {
 779                         struct sample_read_value *value;
 780
 781                         value = &sample->read.group.values[i];
 782                         printf("..... id %016" PRIx64
 783                                ", value %016" PRIx64 "\n",
 784                                value->id, value->value);
 785                 }
 786         } else
 787                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
 788                         sample->read.one.id, sample->read.one.value);
 789 }
 790
 791 static void dump_event(struct perf_session *session, union perf_event *event,
 792                        u64 file_offset, struct perf_sample *sample)
 793 {
 794         if (!dump_trace)
 795                 return;
 796
 797         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 798                file_offset, event->header.size, event->header.type);
 799
 800         trace_event(event);
 801
 802         if (sample)
 803                 perf_session__print_tstamp(session, event, sample);
 804
 805         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 806                event->header.size, perf_event__name(event->header.type));
 807 }
 808
 809 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 810                         struct perf_sample *sample)
 811 {
 812         u64 sample_type;
 813
 814         if (!dump_trace)
 815                 return;
 816
 817         printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 818                event->header.misc, sample->pid, sample->tid, sample->ip,
 819                sample->period, sample->addr);
 820
 821         sample_type = evsel->attr.sample_type;
 822
 823         if (sample_type & PERF_SAMPLE_CALLCHAIN)
 824                 callchain__printf(sample);
 825
 826         if (sample_type & PERF_SAMPLE_BRANCH_STACK)
 827                 branch_stack__printf(sample);
 828
 829         if (sample_type & PERF_SAMPLE_REGS_USER)
 830                 regs_user__printf(sample, evsel->attr.sample_regs_user);
 831
 832         if (sample_type & PERF_SAMPLE_STACK_USER)
 833                 stack_user__printf(&sample->user_stack);
 834
 835         if (sample_type & PERF_SAMPLE_WEIGHT)
 836                 printf("... weight: %" PRIu64 "\n", sample->weight);
 837
 838         if (sample_type & PERF_SAMPLE_DATA_SRC)
 839                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
 840
 841         if (sample_type & PERF_SAMPLE_TRANSACTION)
 842                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
 843
 844         if (sample_type & PERF_SAMPLE_READ)
 845                 sample_read__printf(sample, evsel->attr.read_format);
 846 }
 847
 848 static struct machine *
 849         perf_session__find_machine_for_cpumode(struct perf_session *session,
 850                                                union perf_event *event,
 851                                                struct perf_sample *sample)
 852 {
 853         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 854
 855         if (perf_guest &&
 856             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
 857              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
 858                 u32 pid;
 859
 860                 if (event->header.type == PERF_RECORD_MMAP
 861                     || event->header.type == PERF_RECORD_MMAP2)
 862                         pid = event->mmap.pid;
 863                 else
 864                         pid = sample->pid;
 865
 866                 return perf_session__findnew_machine(session, pid);
 867         }
 868
 869         return &session->machines.host;
 870 }
 871
 872 static int deliver_sample_value(struct perf_session *session,
 873                                 struct perf_tool *tool,
 874                                 union perf_event *event,
 875                                 struct perf_sample *sample,
 876                                 struct sample_read_value *v,
 877                                 struct machine *machine)
 878 {
 879         struct perf_sample_id *sid;
 880
 881         sid = perf_evlist__id2sid(session->evlist, v->id);
 882         if (sid) {
 883                 sample->id     = v->id;
 884                 sample->period = v->value - sid->period;
 885                 sid->period    = v->value;
 886         }
 887
 888         if (!sid || sid->evsel == NULL) {
 889                 ++session->stats.nr_unknown_id;
 890                 return 0;
 891         }
 892
 893         return tool->sample(tool, event, sample, sid->evsel, machine);
 894 }
 895
 896 static int deliver_sample_group(struct perf_session *session,
 897                                 struct perf_tool *tool,
 898                                 union  perf_event *event,
 899                                 struct perf_sample *sample,
 900                                 struct machine *machine)
 901 {
 902         int ret = -EINVAL;
 903         u64 i;
 904
 905         for (i = 0; i < sample->read.group.nr; i++) {
 906                 ret = deliver_sample_value(session, tool, event, sample,
 907                                            &sample->read.group.values[i],
 908                                            machine);
 909                 if (ret)
 910                         break;
 911         }
 912
 913         return ret;
 914 }
 915
 916 static int
 917 perf_session__deliver_sample(struct perf_session *session,
 918                              struct perf_tool *tool,
 919                              union  perf_event *event,
 920                              struct perf_sample *sample,
 921                              struct perf_evsel *evsel,
 922                              struct machine *machine)
 923 {
 924         /* We know evsel != NULL. */
 925         u64 sample_type = evsel->attr.sample_type;
 926         u64 read_format = evsel->attr.read_format;
 927
 928         /* Standard sample delievery. */
 929         if (!(sample_type & PERF_SAMPLE_READ))
 930                 return tool->sample(tool, event, sample, evsel, machine);
 931
 932         /* For PERF_SAMPLE_READ we have either single or group mode. */
 933         if (read_format & PERF_FORMAT_GROUP)
 934                 return deliver_sample_group(session, tool, event, sample,
 935                                             machine);
 936         else
 937                 return deliver_sample_value(session, tool, event, sample,
 938                                             &sample->read.one, machine);
 939 }
 940
 941 static int perf_session_deliver_event(struct perf_session *session,
 942                                       union perf_event *event,
 943                                       struct perf_sample *sample,
 944                                       struct perf_tool *tool,
 945                                       u64 file_offset)
 946 {
 947         struct perf_evsel *evsel;
 948         struct machine *machine;
 949
 950         dump_event(session, event, file_offset, sample);
 951
 952         evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 953         if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
 954                 /*
 955                  * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
 956                  * because the tools right now may apply filters, discarding
 957                  * some of the samples. For consistency, in the future we
 958                  * should have something like nr_filtered_samples and remove
 959                  * the sample->period from total_sample_period, etc, KISS for
 960                  * now tho.
 961                  *
 962                  * Also testing against NULL allows us to handle files without
 963                  * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
 964                  * future probably it'll be a good idea to restrict event
 965                  * processing via perf_session to files with both set.
 966                  */
 967                 hists__inc_nr_events(&evsel->hists, event->header.type);
 968         }
 969
 970         machine = perf_session__find_machine_for_cpumode(session, event,
 971                                                          sample);
 972
 973         switch (event->header.type) {
 974         case PERF_RECORD_SAMPLE:
 975                 dump_sample(evsel, event, sample);
 976                 if (evsel == NULL) {
 977                         ++session->stats.nr_unknown_id;
 978                         return 0;
 979                 }
 980                 if (machine == NULL) {
 981                         ++session->stats.nr_unprocessable_samples;
 982                         return 0;
 983                 }
 984                 return perf_session__deliver_sample(session, tool, event,
 985                                                     sample, evsel, machine);
 986         case PERF_RECORD_MMAP:
 987                 return tool->mmap(tool, event, sample, machine);
 988         case PERF_RECORD_MMAP2:
 989                 return tool->mmap2(tool, event, sample, machine);
 990         case PERF_RECORD_COMM:
 991                 return tool->comm(tool, event, sample, machine);
 992         case PERF_RECORD_FORK:
 993                 return tool->fork(tool, event, sample, machine);
 994         case PERF_RECORD_EXIT:
 995                 return tool->exit(tool, event, sample, machine);
 996         case PERF_RECORD_LOST:
 997                 if (tool->lost == perf_event__process_lost)
 998                         session->stats.total_lost += event->lost.lost;
 999                 return tool->lost(tool, event, sample, machine);
1000         case PERF_RECORD_READ:
1001                 return tool->read(tool, event, sample, evsel, machine);
1002         case PERF_RECORD_THROTTLE:
1003                 return tool->throttle(tool, event, sample, machine);
1004         case PERF_RECORD_UNTHROTTLE:
1005                 return tool->unthrottle(tool, event, sample, machine);
1006         default:
1007                 ++session->stats.nr_unknown_events;
1008                 return -1;
1009         }
1010 }
1011
1012 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
1013                                             struct perf_tool *tool, u64 file_offset)
1014 {
1015         int fd = perf_data_file__fd(session->file);
1016         int err;
1017
1018         dump_event(session, event, file_offset, NULL);
1019
1020         /* These events are processed right away */
1021         switch (event->header.type) {
1022         case PERF_RECORD_HEADER_ATTR:
1023                 err = tool->attr(tool, event, &session->evlist);
1024                 if (err == 0)
1025                         perf_session__set_id_hdr_size(session);
1026                 return err;
1027         case PERF_RECORD_HEADER_TRACING_DATA:
1028                 /* setup for reading amidst mmap */
1029                 lseek(fd, file_offset, SEEK_SET);
1030                 return tool->tracing_data(tool, event, session);
1031         case PERF_RECORD_HEADER_BUILD_ID:
1032                 return tool->build_id(tool, event, session);
1033         case PERF_RECORD_FINISHED_ROUND:
1034                 return tool->finished_round(tool, event, session);
1035         default:
1036                 return -EINVAL;
1037         }
1038 }
1039
1040 static void event_swap(union perf_event *event, bool sample_id_all)
1041 {
1042         perf_event__swap_op swap;
1043
1044         swap = perf_event__swap_ops[event->header.type];
1045         if (swap)
1046                 swap(event, sample_id_all);
1047 }
1048
1049 static int perf_session__process_event(struct perf_session *session,
1050                                        union perf_event *event,
1051                                        struct perf_tool *tool,
1052                                        u64 file_offset)
1053 {
1054         struct perf_sample sample;
1055         int ret;
1056
1057         if (session->header.needs_swap)
1058                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1059
1060         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1061                 return -EINVAL;
1062
1063         events_stats__inc(&session->stats, event->header.type);
1064
1065         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1066                 return perf_session__process_user_event(session, event, tool, file_offset);
1067
1068         /*
1069          * For all kernel events we get the sample data
1070          */
1071         ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1072         if (ret)
1073                 return ret;
1074
1075         if (tool->ordered_samples) {
1076                 ret = perf_session_queue_event(session, event, &sample,
1077                                                file_offset);
1078                 if (ret != -ETIME)
1079                         return ret;
1080         }
1081
1082         return perf_session_deliver_event(session, event, &sample, tool,
1083                                           file_offset);
1084 }
1085
1086 void perf_event_header__bswap(struct perf_event_header *hdr)
1087 {
1088         hdr->type = bswap_32(hdr->type);
1089         hdr->misc = bswap_16(hdr->misc);
1090         hdr->size = bswap_16(hdr->size);
1091 }
1092
1093 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1094 {
1095         return machine__findnew_thread(&session->machines.host, 0, pid);
1096 }
1097
1098 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1099 {
1100         struct thread *thread = perf_session__findnew(session, 0);
1101
1102         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1103                 pr_err("problem inserting idle task.\n");
1104                 thread = NULL;
1105         }
1106
1107         return thread;
1108 }
1109
1110 static void perf_session__warn_about_errors(const struct perf_session *session,
1111                                             const struct perf_tool *tool)
1112 {
1113         if (tool->lost == perf_event__process_lost &&
1114             session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1115                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1116                             "Check IO/CPU overload!\n\n",
1117                             session->stats.nr_events[0],
1118                             session->stats.nr_events[PERF_RECORD_LOST]);
1119         }
1120
1121         if (session->stats.nr_unknown_events != 0) {
1122                 ui__warning("Found %u unknown events!\n\n"
1123                             "Is this an older tool processing a perf.data "
1124                             "file generated by a more recent tool?\n\n"
1125                             "If that is not the case, consider "
1126                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1127                             session->stats.nr_unknown_events);
1128         }
1129
1130         if (session->stats.nr_unknown_id != 0) {
1131                 ui__warning("%u samples with id not present in the header\n",
1132                             session->stats.nr_unknown_id);
1133         }
1134
1135         if (session->stats.nr_invalid_chains != 0) {
1136                 ui__warning("Found invalid callchains!\n\n"
1137                             "%u out of %u events were discarded for this reason.\n\n"
1138                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1139                             session->stats.nr_invalid_chains,
1140                             session->stats.nr_events[PERF_RECORD_SAMPLE]);
1141         }
1142
1143         if (session->stats.nr_unprocessable_samples != 0) {
1144                 ui__warning("%u unprocessable samples recorded.\n"
1145                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1146                             session->stats.nr_unprocessable_samples);
1147         }
1148 }
1149
1150 volatile int session_done;
1151
1152 static int __perf_session__process_pipe_events(struct perf_session *session,
1153                                                struct perf_tool *tool)
1154 {
1155         int fd = perf_data_file__fd(session->file);
1156         union perf_event *event;
1157         uint32_t size, cur_size = 0;
1158         void *buf = NULL;
1159         int skip = 0;
1160         u64 head;
1161         int err;
1162         void *p;
1163
1164         perf_tool__fill_defaults(tool);
1165
1166         head = 0;
1167         cur_size = sizeof(union perf_event);
1168
1169         buf = malloc(cur_size);
1170         if (!buf)
1171                 return -errno;
1172 more:
1173         event = buf;
1174         err = readn(fd, event, sizeof(struct perf_event_header));
1175         if (err <= 0) {
1176                 if (err == 0)
1177                         goto done;
1178
1179                 pr_err("failed to read event header\n");
1180                 goto out_err;
1181         }
1182
1183         if (session->header.needs_swap)
1184                 perf_event_header__bswap(&event->header);
1185
1186         size = event->header.size;
1187         if (size < sizeof(struct perf_event_header)) {
1188                 pr_err("bad event header size\n");
1189                 goto out_err;
1190         }
1191
1192         if (size > cur_size) {
1193                 void *new = realloc(buf, size);
1194                 if (!new) {
1195                         pr_err("failed to allocate memory to read event\n");
1196                         goto out_err;
1197                 }
1198                 buf = new;
1199                 cur_size = size;
1200                 event = buf;
1201         }
1202         p = event;
1203         p += sizeof(struct perf_event_header);
1204
1205         if (size - sizeof(struct perf_event_header)) {
1206                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1207                 if (err <= 0) {
1208                         if (err == 0) {
1209                                 pr_err("unexpected end of event stream\n");
1210                                 goto done;
1211                         }
1212
1213                         pr_err("failed to read event data\n");
1214                         goto out_err;
1215                 }
1216         }
1217
1218         if ((skip = perf_session__process_event(session, event, tool, head)) < 0) {
1219                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1220                        head, event->header.size, event->header.type);
1221                 err = -EINVAL;
1222                 goto out_err;
1223         }
1224
1225         head += size;
1226
1227         if (skip > 0)
1228                 head += skip;
1229
1230         if (!session_done())
1231                 goto more;
1232 done:
1233         /* do the final flush for ordered samples */
1234         session->ordered_samples.next_flush = ULLONG_MAX;
1235         err = flush_sample_queue(session, tool);
1236 out_err:
1237         free(buf);
1238         perf_session__warn_about_errors(session, tool);
1239         perf_session_free_sample_buffers(session);
1240         return err;
1241 }
1242
1243 static union perf_event *
1244 fetch_mmaped_event(struct perf_session *session,
1245                    u64 head, size_t mmap_size, char *buf)
1246 {
1247         union perf_event *event;
1248
1249         /*
1250          * Ensure we have enough space remaining to read
1251          * the size of the event in the headers.
1252          */
1253         if (head + sizeof(event->header) > mmap_size)
1254                 return NULL;
1255
1256         event = (union perf_event *)(buf + head);
1257
1258         if (session->header.needs_swap)
1259                 perf_event_header__bswap(&event->header);
1260
1261         if (head + event->header.size > mmap_size) {
1262                 /* We're not fetching the event so swap back again */
1263                 if (session->header.needs_swap)
1264                         perf_event_header__bswap(&event->header);
1265                 return NULL;
1266         }
1267
1268         return event;
1269 }
1270
1271 /*
1272  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1273  * slices. On 32bit we use 32MB.
1274  */
1275 #if BITS_PER_LONG == 64
1276 #define MMAP_SIZE ULLONG_MAX
1277 #define NUM_MMAPS 1
1278 #else
1279 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1280 #define NUM_MMAPS 128
1281 #endif
1282
1283 int __perf_session__process_events(struct perf_session *session,
1284                                    u64 data_offset, u64 data_size,
1285                                    u64 file_size, struct perf_tool *tool)
1286 {
1287         int fd = perf_data_file__fd(session->file);
1288         u64 head, page_offset, file_offset, file_pos;
1289         int err, mmap_prot, mmap_flags, map_idx = 0;
1290         size_t  mmap_size;
1291         char *buf, *mmaps[NUM_MMAPS];
1292         union perf_event *event;
1293         uint32_t size;
1294         struct ui_progress prog;
1295
1296         perf_tool__fill_defaults(tool);
1297
1298         page_offset = page_size * (data_offset / page_size);
1299         file_offset = page_offset;
1300         head = data_offset - page_offset;
1301
1302         if (data_size && (data_offset + data_size < file_size))
1303                 file_size = data_offset + data_size;
1304
1305         ui_progress__init(&prog, file_size, "Processing events...");
1306
1307         mmap_size = MMAP_SIZE;
1308         if (mmap_size > file_size)
1309                 mmap_size = file_size;
1310
1311         memset(mmaps, 0, sizeof(mmaps));
1312
1313         mmap_prot  = PROT_READ;
1314         mmap_flags = MAP_SHARED;
1315
1316         if (session->header.needs_swap) {
1317                 mmap_prot  |= PROT_WRITE;
1318                 mmap_flags = MAP_PRIVATE;
1319         }
1320 remap:
1321         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1322                    file_offset);
1323         if (buf == MAP_FAILED) {
1324                 pr_err("failed to mmap file\n");
1325                 err = -errno;
1326                 goto out_err;
1327         }
1328         mmaps[map_idx] = buf;
1329         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1330         file_pos = file_offset + head;
1331
1332 more:
1333         event = fetch_mmaped_event(session, head, mmap_size, buf);
1334         if (!event) {
1335                 if (mmaps[map_idx]) {
1336                         munmap(mmaps[map_idx], mmap_size);
1337                         mmaps[map_idx] = NULL;
1338                 }
1339
1340                 page_offset = page_size * (head / page_size);
1341                 file_offset += page_offset;
1342                 head -= page_offset;
1343                 goto remap;
1344         }
1345
1346         size = event->header.size;
1347
1348         if (size < sizeof(struct perf_event_header) ||
1349             perf_session__process_event(session, event, tool, file_pos) < 0) {
1350                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1351                        file_offset + head, event->header.size,
1352                        event->header.type);
1353                 err = -EINVAL;
1354                 goto out_err;
1355         }
1356
1357         head += size;
1358         file_pos += size;
1359
1360         ui_progress__update(&prog, size);
1361
1362         if (session_done())
1363                 goto out;
1364
1365         if (file_pos < file_size)
1366                 goto more;
1367
1368 out:
1369         /* do the final flush for ordered samples */
1370         session->ordered_samples.next_flush = ULLONG_MAX;
1371         err = flush_sample_queue(session, tool);
1372 out_err:
1373         ui_progress__finish();
1374         perf_session__warn_about_errors(session, tool);
1375         perf_session_free_sample_buffers(session);
1376         return err;
1377 }
1378
1379 int perf_session__process_events(struct perf_session *session,
1380                                  struct perf_tool *tool)
1381 {
1382         u64 size = perf_data_file__size(session->file);
1383         int err;
1384
1385         if (perf_session__register_idle_thread(session) == NULL)
1386                 return -ENOMEM;
1387
1388         if (!perf_data_file__is_pipe(session->file))
1389                 err = __perf_session__process_events(session,
1390                                                      session->header.data_offset,
1391                                                      session->header.data_size,
1392                                                      size, tool);
1393         else
1394                 err = __perf_session__process_pipe_events(session, tool);
1395
1396         return err;
1397 }
1398
1399 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1400 {
1401         struct perf_evsel *evsel;
1402
1403         list_for_each_entry(evsel, &session->evlist->entries, node) {
1404                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1405                         return true;
1406         }
1407
1408         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1409         return false;
1410 }
1411
1412 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1413                                      const char *symbol_name, u64 addr)
1414 {
1415         char *bracket;
1416         enum map_type i;
1417         struct ref_reloc_sym *ref;
1418
1419         ref = zalloc(sizeof(struct ref_reloc_sym));
1420         if (ref == NULL)
1421                 return -ENOMEM;
1422
1423         ref->name = strdup(symbol_name);
1424         if (ref->name == NULL) {
1425                 free(ref);
1426                 return -ENOMEM;
1427         }
1428
1429         bracket = strchr(ref->name, ']');
1430         if (bracket)
1431                 *bracket = '\0';
1432
1433         ref->addr = addr;
1434
1435         for (i = 0; i < MAP__NR_TYPES; ++i) {
1436                 struct kmap *kmap = map__kmap(maps[i]);
1437                 kmap->ref_reloc_sym = ref;
1438         }
1439
1440         return 0;
1441 }
1442
1443 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1444 {
1445         return machines__fprintf_dsos(&session->machines, fp);
1446 }
1447
1448 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1449                                           bool (skip)(struct dso *dso, int parm), int parm)
1450 {
1451         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1452 }
1453
1454 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1455 {
1456         struct perf_evsel *pos;
1457         size_t ret = fprintf(fp, "Aggregated stats:\n");
1458
1459         ret += events_stats__fprintf(&session->stats, fp);
1460
1461         list_for_each_entry(pos, &session->evlist->entries, node) {
1462                 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1463                 ret += events_stats__fprintf(&pos->hists.stats, fp);
1464         }
1465
1466         return ret;
1467 }
1468
1469 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1470 {
1471         /*
1472          * FIXME: Here we have to actually print all the machines in this
1473          * session, not just the host...
1474          */
1475         return machine__fprintf(&session->machines.host, fp);
1476 }
1477
1478 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1479                                               unsigned int type)
1480 {
1481         struct perf_evsel *pos;
1482
1483         list_for_each_entry(pos, &session->evlist->entries, node) {
1484                 if (pos->attr.type == type)
1485                         return pos;
1486         }
1487         return NULL;
1488 }
1489
1490 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
1491                           struct perf_sample *sample, struct machine *machine,
1492                           unsigned int print_opts, unsigned int stack_depth)
1493 {
1494         struct addr_location al;
1495         struct callchain_cursor_node *node;
1496         int print_ip = print_opts & PRINT_IP_OPT_IP;
1497         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1498         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1499         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1500         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1501         char s = print_oneline ? ' ' : '\t';
1502
1503         if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
1504                 error("problem processing %d event, skipping it.\n",
1505                         event->header.type);
1506                 return;
1507         }
1508
1509         if (symbol_conf.use_callchain && sample->callchain) {
1510
1511                 if (machine__resolve_callchain(machine, evsel, al.thread,
1512                                                sample, NULL, NULL,
1513                                                PERF_MAX_STACK_DEPTH) != 0) {
1514                         if (verbose)
1515                                 error("Failed to resolve callchain. Skipping\n");
1516                         return;
1517                 }
1518                 callchain_cursor_commit(&callchain_cursor);
1519
1520                 while (stack_depth) {
1521                         node = callchain_cursor_current(&callchain_cursor);
1522                         if (!node)
1523                                 break;
1524
1525                         if (print_ip)
1526                                 printf("%c%16" PRIx64, s, node->ip);
1527
1528                         if (print_sym) {
1529                                 printf(" ");
1530                                 if (print_symoffset) {
1531                                         al.addr = node->ip;
1532                                         al.map  = node->map;
1533                                         symbol__fprintf_symname_offs(node->sym, &al, stdout);
1534                                 } else
1535                                         symbol__fprintf_symname(node->sym, stdout);
1536                         }
1537
1538                         if (print_dso) {
1539                                 printf(" (");
1540                                 map__fprintf_dsoname(node->map, stdout);
1541                                 printf(")");
1542                         }
1543
1544                         if (!print_oneline)
1545                                 printf("\n");
1546
1547                         callchain_cursor_advance(&callchain_cursor);
1548
1549                         stack_depth--;
1550                 }
1551
1552         } else {
1553                 if (print_ip)
1554                         printf("%16" PRIx64, sample->ip);
1555
1556                 if (print_sym) {
1557                         printf(" ");
1558                         if (print_symoffset)
1559                                 symbol__fprintf_symname_offs(al.sym, &al,
1560                                                              stdout);
1561                         else
1562                                 symbol__fprintf_symname(al.sym, stdout);
1563                 }
1564
1565                 if (print_dso) {
1566                         printf(" (");
1567                         map__fprintf_dsoname(al.map, stdout);
1568                         printf(")");
1569                 }
1570         }
1571 }
1572
1573 int perf_session__cpu_bitmap(struct perf_session *session,
1574                              const char *cpu_list, unsigned long *cpu_bitmap)
1575 {
1576         int i;
1577         struct cpu_map *map;
1578
1579         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1580                 struct perf_evsel *evsel;
1581
1582                 evsel = perf_session__find_first_evtype(session, i);
1583                 if (!evsel)
1584                         continue;
1585
1586                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1587                         pr_err("File does not contain CPU events. "
1588                                "Remove -c option to proceed.\n");
1589                         return -1;
1590                 }
1591         }
1592
1593         map = cpu_map__new(cpu_list);
1594         if (map == NULL) {
1595                 pr_err("Invalid cpu_list\n");
1596                 return -1;
1597         }
1598
1599         for (i = 0; i < map->nr; i++) {
1600                 int cpu = map->map[i];
1601
1602                 if (cpu >= MAX_NR_CPUS) {
1603                         pr_err("Requested CPU %d too large. "
1604                                "Consider raising MAX_NR_CPUS\n", cpu);
1605                         return -1;
1606                 }
1607
1608                 set_bit(cpu, cpu_bitmap);
1609         }
1610
1611         return 0;
1612 }
1613
1614 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1615                                 bool full)
1616 {
1617         int fd = perf_data_file__fd(session->file);
1618         struct stat st;
1619         int ret;
1620
1621         if (session == NULL || fp == NULL)
1622                 return;
1623
1624         ret = fstat(fd, &st);
1625         if (ret == -1)
1626                 return;
1627
1628         fprintf(fp, "# ========\n");
1629         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1630         perf_header__fprintf_info(session, fp, full);
1631         fprintf(fp, "# ========\n#\n");
1632 }
1633
1634
1635 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1636                                              const struct perf_evsel_str_handler *assocs,
1637                                              size_t nr_assocs)
1638 {
1639         struct perf_evsel *evsel;
1640         size_t i;
1641         int err;
1642
1643         for (i = 0; i < nr_assocs; i++) {
1644                 /*
1645                  * Adding a handler for an event not in the session,
1646                  * just ignore it.
1647                  */
1648                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1649                 if (evsel == NULL)
1650                         continue;
1651
1652                 err = -EEXIST;
1653                 if (evsel->handler != NULL)
1654                         goto out;
1655                 evsel->handler = assocs[i].handler;
1656         }
1657
1658         err = 0;
1659 out:
1660         return err;
1661 }