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 *self, bool force)
  20 {
  21         struct stat input_stat;
  22
  23         if (!strcmp(self->filename, "-")) {
  24                 self->fd_pipe = true;
  25                 self->fd = STDIN_FILENO;
  26
  27                 if (perf_session__read_header(self) < 0)
  28                         pr_err("incompatible file format (rerun with -v to learn more)");
  29
  30                 return 0;
  31         }
  32
  33         self->fd = open(self->filename, O_RDONLY);
  34         if (self->fd < 0) {
  35                 int err = errno;
  36
  37                 pr_err("failed to open %s: %s", self->filename, strerror(err));
  38                 if (err == ENOENT && !strcmp(self->filename, "perf.data"))
  39                         pr_err("  (try 'perf record' first)");
  40                 pr_err("\n");
  41                 return -errno;
  42         }
  43
  44         if (fstat(self->fd, &input_stat) < 0)
  45                 goto out_close;
  46
  47         if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
  48                 pr_err("file %s not owned by current user or root\n",
  49                        self->filename);
  50                 goto out_close;
  51         }
  52
  53         if (!input_stat.st_size) {
  54                 pr_info("zero-sized file (%s), nothing to do!\n",
  55                         self->filename);
  56                 goto out_close;
  57         }
  58
  59         if (perf_session__read_header(self) < 0) {
  60                 pr_err("incompatible file format (rerun with -v to learn more)");
  61                 goto out_close;
  62         }
  63
  64         if (!perf_evlist__valid_sample_type(self->evlist)) {
  65                 pr_err("non matching sample_type");
  66                 goto out_close;
  67         }
  68
  69         if (!perf_evlist__valid_sample_id_all(self->evlist)) {
  70                 pr_err("non matching sample_id_all");
  71                 goto out_close;
  72         }
  73
  74         if (!perf_evlist__valid_read_format(self->evlist)) {
  75                 pr_err("non matching read_format");
  76                 goto out_close;
  77         }
  78
  79         self->size = input_stat.st_size;
  80         return 0;
  81
  82 out_close:
  83         close(self->fd);
  84         self->fd = -1;
  85         return -1;
  86 }
  87
  88 void perf_session__set_id_hdr_size(struct perf_session *session)
  89 {
  90         u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
  91
  92         machines__set_id_hdr_size(&session->machines, id_hdr_size);
  93 }
  94
  95 int perf_session__create_kernel_maps(struct perf_session *self)
  96 {
  97         int ret = machine__create_kernel_maps(&self->machines.host);
  98
  99         if (ret >= 0)
 100                 ret = machines__create_guest_kernel_maps(&self->machines);
 101         return ret;
 102 }
 103
 104 static void perf_session__destroy_kernel_maps(struct perf_session *self)
 105 {
 106         machines__destroy_kernel_maps(&self->machines);
 107 }
 108
 109 struct perf_session *perf_session__new(const char *filename, int mode,
 110                                        bool force, bool repipe,
 111                                        struct perf_tool *tool)
 112 {
 113         struct perf_session *self;
 114         struct stat st;
 115         size_t len;
 116
 117         if (!filename || !strlen(filename)) {
 118                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
 119                         filename = "-";
 120                 else
 121                         filename = "perf.data";
 122         }
 123
 124         len = strlen(filename);
 125         self = zalloc(sizeof(*self) + len);
 126
 127         if (self == NULL)
 128                 goto out;
 129
 130         memcpy(self->filename, filename, len);
 131         self->repipe = repipe;
 132         INIT_LIST_HEAD(&self->ordered_samples.samples);
 133         INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
 134         INIT_LIST_HEAD(&self->ordered_samples.to_free);
 135         machines__init(&self->machines);
 136
 137         if (mode == O_RDONLY) {
 138                 if (perf_session__open(self, force) < 0)
 139                         goto out_delete;
 140                 perf_session__set_id_hdr_size(self);
 141         } else if (mode == O_WRONLY) {
 142                 /*
 143                  * In O_RDONLY mode this will be performed when reading the
 144                  * kernel MMAP event, in perf_event__process_mmap().
 145                  */
 146                 if (perf_session__create_kernel_maps(self) < 0)
 147                         goto out_delete;
 148         }
 149
 150         if (tool && tool->ordering_requires_timestamps &&
 151             tool->ordered_samples && !perf_evlist__sample_id_all(self->evlist)) {
 152                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 153                 tool->ordered_samples = false;
 154         }
 155
 156 out:
 157         return self;
 158 out_delete:
 159         perf_session__delete(self);
 160         return NULL;
 161 }
 162
 163 static void perf_session__delete_dead_threads(struct perf_session *session)
 164 {
 165         machine__delete_dead_threads(&session->machines.host);
 166 }
 167
 168 static void perf_session__delete_threads(struct perf_session *session)
 169 {
 170         machine__delete_threads(&session->machines.host);
 171 }
 172
 173 static void perf_session_env__delete(struct perf_session_env *env)
 174 {
 175         free(env->hostname);
 176         free(env->os_release);
 177         free(env->version);
 178         free(env->arch);
 179         free(env->cpu_desc);
 180         free(env->cpuid);
 181
 182         free(env->cmdline);
 183         free(env->sibling_cores);
 184         free(env->sibling_threads);
 185         free(env->numa_nodes);
 186         free(env->pmu_mappings);
 187 }
 188
 189 void perf_session__delete(struct perf_session *self)
 190 {
 191         perf_session__destroy_kernel_maps(self);
 192         perf_session__delete_dead_threads(self);
 193         perf_session__delete_threads(self);
 194         perf_session_env__delete(&self->header.env);
 195         machines__exit(&self->machines);
 196         close(self->fd);
 197         free(self);
 198         vdso__exit();
 199 }
 200
 201 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 202                                                  __maybe_unused,
 203                                                  union perf_event *event
 204                                                  __maybe_unused,
 205                                                  struct perf_session *session
 206                                                 __maybe_unused)
 207 {
 208         dump_printf(": unhandled!\n");
 209         return 0;
 210 }
 211
 212 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 213                                          union perf_event *event __maybe_unused,
 214                                          struct perf_evlist **pevlist
 215                                          __maybe_unused)
 216 {
 217         dump_printf(": unhandled!\n");
 218         return 0;
 219 }
 220
 221 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 222                                      union perf_event *event __maybe_unused,
 223                                      struct perf_sample *sample __maybe_unused,
 224                                      struct perf_evsel *evsel __maybe_unused,
 225                                      struct machine *machine __maybe_unused)
 226 {
 227         dump_printf(": unhandled!\n");
 228         return 0;
 229 }
 230
 231 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 232                               union perf_event *event __maybe_unused,
 233                               struct perf_sample *sample __maybe_unused,
 234                               struct machine *machine __maybe_unused)
 235 {
 236         dump_printf(": unhandled!\n");
 237         return 0;
 238 }
 239
 240 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 241                                        union perf_event *event __maybe_unused,
 242                                        struct perf_session *perf_session
 243                                        __maybe_unused)
 244 {
 245         dump_printf(": unhandled!\n");
 246         return 0;
 247 }
 248
 249 static int process_finished_round(struct perf_tool *tool,
 250                                   union perf_event *event,
 251                                   struct perf_session *session);
 252
 253 void perf_tool__fill_defaults(struct perf_tool *tool)
 254 {
 255         if (tool->sample == NULL)
 256                 tool->sample = process_event_sample_stub;
 257         if (tool->mmap == NULL)
 258                 tool->mmap = process_event_stub;
 259         if (tool->comm == NULL)
 260                 tool->comm = process_event_stub;
 261         if (tool->fork == NULL)
 262                 tool->fork = process_event_stub;
 263         if (tool->exit == NULL)
 264                 tool->exit = process_event_stub;
 265         if (tool->lost == NULL)
 266                 tool->lost = perf_event__process_lost;
 267         if (tool->read == NULL)
 268                 tool->read = process_event_sample_stub;
 269         if (tool->throttle == NULL)
 270                 tool->throttle = process_event_stub;
 271         if (tool->unthrottle == NULL)
 272                 tool->unthrottle = process_event_stub;
 273         if (tool->attr == NULL)
 274                 tool->attr = process_event_synth_attr_stub;
 275         if (tool->tracing_data == NULL)
 276                 tool->tracing_data = process_event_synth_tracing_data_stub;
 277         if (tool->build_id == NULL)
 278                 tool->build_id = process_finished_round_stub;
 279         if (tool->finished_round == NULL) {
 280                 if (tool->ordered_samples)
 281                         tool->finished_round = process_finished_round;
 282                 else
 283                         tool->finished_round = process_finished_round_stub;
 284         }
 285 }
 286
 287 void mem_bswap_32(void *src, int byte_size)
 288 {
 289         u32 *m = src;
 290         while (byte_size > 0) {
 291                 *m = bswap_32(*m);
 292                 byte_size -= sizeof(u32);
 293                 ++m;
 294         }
 295 }
 296
 297 void mem_bswap_64(void *src, int byte_size)
 298 {
 299         u64 *m = src;
 300
 301         while (byte_size > 0) {
 302                 *m = bswap_64(*m);
 303                 byte_size -= sizeof(u64);
 304                 ++m;
 305         }
 306 }
 307
 308 static void swap_sample_id_all(union perf_event *event, void *data)
 309 {
 310         void *end = (void *) event + event->header.size;
 311         int size = end - data;
 312
 313         BUG_ON(size % sizeof(u64));
 314         mem_bswap_64(data, size);
 315 }
 316
 317 static void perf_event__all64_swap(union perf_event *event,
 318                                    bool sample_id_all __maybe_unused)
 319 {
 320         struct perf_event_header *hdr = &event->header;
 321         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 322 }
 323
 324 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 325 {
 326         event->comm.pid = bswap_32(event->comm.pid);
 327         event->comm.tid = bswap_32(event->comm.tid);
 328
 329         if (sample_id_all) {
 330                 void *data = &event->comm.comm;
 331
 332                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 333                 swap_sample_id_all(event, data);
 334         }
 335 }
 336
 337 static void perf_event__mmap_swap(union perf_event *event,
 338                                   bool sample_id_all)
 339 {
 340         event->mmap.pid   = bswap_32(event->mmap.pid);
 341         event->mmap.tid   = bswap_32(event->mmap.tid);
 342         event->mmap.start = bswap_64(event->mmap.start);
 343         event->mmap.len   = bswap_64(event->mmap.len);
 344         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 345
 346         if (sample_id_all) {
 347                 void *data = &event->mmap.filename;
 348
 349                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 350                 swap_sample_id_all(event, data);
 351         }
 352 }
 353
 354 static void perf_event__mmap2_swap(union perf_event *event,
 355                                   bool sample_id_all)
 356 {
 357         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 358         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 359         event->mmap2.start = bswap_64(event->mmap2.start);
 360         event->mmap2.len   = bswap_64(event->mmap2.len);
 361         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 362         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 363         event->mmap2.min   = bswap_32(event->mmap2.min);
 364         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 365
 366         if (sample_id_all) {
 367                 void *data = &event->mmap2.filename;
 368
 369                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 370                 swap_sample_id_all(event, data);
 371         }
 372 }
 373 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 374 {
 375         event->fork.pid  = bswap_32(event->fork.pid);
 376         event->fork.tid  = bswap_32(event->fork.tid);
 377         event->fork.ppid = bswap_32(event->fork.ppid);
 378         event->fork.ptid = bswap_32(event->fork.ptid);
 379         event->fork.time = bswap_64(event->fork.time);
 380
 381         if (sample_id_all)
 382                 swap_sample_id_all(event, &event->fork + 1);
 383 }
 384
 385 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 386 {
 387         event->read.pid          = bswap_32(event->read.pid);
 388         event->read.tid          = bswap_32(event->read.tid);
 389         event->read.value        = bswap_64(event->read.value);
 390         event->read.time_enabled = bswap_64(event->read.time_enabled);
 391         event->read.time_running = bswap_64(event->read.time_running);
 392         event->read.id           = bswap_64(event->read.id);
 393
 394         if (sample_id_all)
 395                 swap_sample_id_all(event, &event->read + 1);
 396 }
 397
 398 static u8 revbyte(u8 b)
 399 {
 400         int rev = (b >> 4) | ((b & 0xf) << 4);
 401         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 402         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 403         return (u8) rev;
 404 }
 405
 406 /*
 407  * XXX this is hack in attempt to carry flags bitfield
 408  * throught endian village. ABI says:
 409  *
 410  * Bit-fields are allocated from right to left (least to most significant)
 411  * on little-endian implementations and from left to right (most to least
 412  * significant) on big-endian implementations.
 413  *
 414  * The above seems to be byte specific, so we need to reverse each
 415  * byte of the bitfield. 'Internet' also says this might be implementation
 416  * specific and we probably need proper fix and carry perf_event_attr
 417  * bitfield flags in separate data file FEAT_ section. Thought this seems
 418  * to work for now.
 419  */
 420 static void swap_bitfield(u8 *p, unsigned len)
 421 {
 422         unsigned i;
 423
 424         for (i = 0; i < len; i++) {
 425                 *p = revbyte(*p);
 426                 p++;
 427         }
 428 }
 429
 430 /* exported for swapping attributes in file header */
 431 void perf_event__attr_swap(struct perf_event_attr *attr)
 432 {
 433         attr->type              = bswap_32(attr->type);
 434         attr->size              = bswap_32(attr->size);
 435         attr->config            = bswap_64(attr->config);
 436         attr->sample_period     = bswap_64(attr->sample_period);
 437         attr->sample_type       = bswap_64(attr->sample_type);
 438         attr->read_format       = bswap_64(attr->read_format);
 439         attr->wakeup_events     = bswap_32(attr->wakeup_events);
 440         attr->bp_type           = bswap_32(attr->bp_type);
 441         attr->bp_addr           = bswap_64(attr->bp_addr);
 442         attr->bp_len            = bswap_64(attr->bp_len);
 443
 444         swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
 445 }
 446
 447 static void perf_event__hdr_attr_swap(union perf_event *event,
 448                                       bool sample_id_all __maybe_unused)
 449 {
 450         size_t size;
 451
 452         perf_event__attr_swap(&event->attr.attr);
 453
 454         size = event->header.size;
 455         size -= (void *)&event->attr.id - (void *)event;
 456         mem_bswap_64(event->attr.id, size);
 457 }
 458
 459 static void perf_event__event_type_swap(union perf_event *event,
 460                                         bool sample_id_all __maybe_unused)
 461 {
 462         event->event_type.event_type.event_id =
 463                 bswap_64(event->event_type.event_type.event_id);
 464 }
 465
 466 static void perf_event__tracing_data_swap(union perf_event *event,
 467                                           bool sample_id_all __maybe_unused)
 468 {
 469         event->tracing_data.size = bswap_32(event->tracing_data.size);
 470 }
 471
 472 typedef void (*perf_event__swap_op)(union perf_event *event,
 473                                     bool sample_id_all);
 474
 475 static perf_event__swap_op perf_event__swap_ops[] = {
 476         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 477         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 478         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 479         [PERF_RECORD_FORK]                = perf_event__task_swap,
 480         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 481         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 482         [PERF_RECORD_READ]                = perf_event__read_swap,
 483         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 484         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 485         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 486         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 487         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 488         [PERF_RECORD_HEADER_MAX]          = NULL,
 489 };
 490
 491 struct sample_queue {
 492         u64                     timestamp;
 493         u64                     file_offset;
 494         union perf_event        *event;
 495         struct list_head        list;
 496 };
 497
 498 static void perf_session_free_sample_buffers(struct perf_session *session)
 499 {
 500         struct ordered_samples *os = &session->ordered_samples;
 501
 502         while (!list_empty(&os->to_free)) {
 503                 struct sample_queue *sq;
 504
 505                 sq = list_entry(os->to_free.next, struct sample_queue, list);
 506                 list_del(&sq->list);
 507                 free(sq);
 508         }
 509 }
 510
 511 static int perf_session_deliver_event(struct perf_session *session,
 512                                       union perf_event *event,
 513                                       struct perf_sample *sample,
 514                                       struct perf_tool *tool,
 515                                       u64 file_offset);
 516
 517 static int flush_sample_queue(struct perf_session *s,
 518                        struct perf_tool *tool)
 519 {
 520         struct ordered_samples *os = &s->ordered_samples;
 521         struct list_head *head = &os->samples;
 522         struct sample_queue *tmp, *iter;
 523         struct perf_sample sample;
 524         u64 limit = os->next_flush;
 525         u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
 526         unsigned idx = 0, progress_next = os->nr_samples / 16;
 527         bool show_progress = limit == ULLONG_MAX;
 528         int ret;
 529
 530         if (!tool->ordered_samples || !limit)
 531                 return 0;
 532
 533         list_for_each_entry_safe(iter, tmp, head, list) {
 534                 if (iter->timestamp > limit)
 535                         break;
 536
 537                 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
 538                 if (ret)
 539                         pr_err("Can't parse sample, err = %d\n", ret);
 540                 else {
 541                         ret = perf_session_deliver_event(s, iter->event, &sample, tool,
 542                                                          iter->file_offset);
 543                         if (ret)
 544                                 return ret;
 545                 }
 546
 547                 os->last_flush = iter->timestamp;
 548                 list_del(&iter->list);
 549                 list_add(&iter->list, &os->sample_cache);
 550                 if (show_progress && (++idx >= progress_next)) {
 551                         progress_next += os->nr_samples / 16;
 552                         ui_progress__update(idx, os->nr_samples,
 553                                             "Processing time ordered events...");
 554                 }
 555         }
 556
 557         if (list_empty(head)) {
 558                 os->last_sample = NULL;
 559         } else if (last_ts <= limit) {
 560                 os->last_sample =
 561                         list_entry(head->prev, struct sample_queue, list);
 562         }
 563
 564         os->nr_samples = 0;
 565
 566         return 0;
 567 }
 568
 569 /*
 570  * When perf record finishes a pass on every buffers, it records this pseudo
 571  * event.
 572  * We record the max timestamp t found in the pass n.
 573  * Assuming these timestamps are monotonic across cpus, we know that if
 574  * a buffer still has events with timestamps below t, they will be all
 575  * available and then read in the pass n + 1.
 576  * Hence when we start to read the pass n + 2, we can safely flush every
 577  * events with timestamps below t.
 578  *
 579  *    ============ PASS n =================
 580  *       CPU 0         |   CPU 1
 581  *                     |
 582  *    cnt1 timestamps  |   cnt2 timestamps
 583  *          1          |         2
 584  *          2          |         3
 585  *          -          |         4  <--- max recorded
 586  *
 587  *    ============ PASS n + 1 ==============
 588  *       CPU 0         |   CPU 1
 589  *                     |
 590  *    cnt1 timestamps  |   cnt2 timestamps
 591  *          3          |         5
 592  *          4          |         6
 593  *          5          |         7 <---- max recorded
 594  *
 595  *      Flush every events below timestamp 4
 596  *
 597  *    ============ PASS n + 2 ==============
 598  *       CPU 0         |   CPU 1
 599  *                     |
 600  *    cnt1 timestamps  |   cnt2 timestamps
 601  *          6          |         8
 602  *          7          |         9
 603  *          -          |         10
 604  *
 605  *      Flush every events below timestamp 7
 606  *      etc...
 607  */
 608 static int process_finished_round(struct perf_tool *tool,
 609                                   union perf_event *event __maybe_unused,
 610                                   struct perf_session *session)
 611 {
 612         int ret = flush_sample_queue(session, tool);
 613         if (!ret)
 614                 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
 615
 616         return ret;
 617 }
 618
 619 /* The queue is ordered by time */
 620 static void __queue_event(struct sample_queue *new, struct perf_session *s)
 621 {
 622         struct ordered_samples *os = &s->ordered_samples;
 623         struct sample_queue *sample = os->last_sample;
 624         u64 timestamp = new->timestamp;
 625         struct list_head *p;
 626
 627         ++os->nr_samples;
 628         os->last_sample = new;
 629
 630         if (!sample) {
 631                 list_add(&new->list, &os->samples);
 632                 os->max_timestamp = timestamp;
 633                 return;
 634         }
 635
 636         /*
 637          * last_sample might point to some random place in the list as it's
 638          * the last queued event. We expect that the new event is close to
 639          * this.
 640          */
 641         if (sample->timestamp <= timestamp) {
 642                 while (sample->timestamp <= timestamp) {
 643                         p = sample->list.next;
 644                         if (p == &os->samples) {
 645                                 list_add_tail(&new->list, &os->samples);
 646                                 os->max_timestamp = timestamp;
 647                                 return;
 648                         }
 649                         sample = list_entry(p, struct sample_queue, list);
 650                 }
 651                 list_add_tail(&new->list, &sample->list);
 652         } else {
 653                 while (sample->timestamp > timestamp) {
 654                         p = sample->list.prev;
 655                         if (p == &os->samples) {
 656                                 list_add(&new->list, &os->samples);
 657                                 return;
 658                         }
 659                         sample = list_entry(p, struct sample_queue, list);
 660                 }
 661                 list_add(&new->list, &sample->list);
 662         }
 663 }
 664
 665 #define MAX_SAMPLE_BUFFER       (64 * 1024 / sizeof(struct sample_queue))
 666
 667 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
 668                                     struct perf_sample *sample, u64 file_offset)
 669 {
 670         struct ordered_samples *os = &s->ordered_samples;
 671         struct list_head *sc = &os->sample_cache;
 672         u64 timestamp = sample->time;
 673         struct sample_queue *new;
 674
 675         if (!timestamp || timestamp == ~0ULL)
 676                 return -ETIME;
 677
 678         if (timestamp < s->ordered_samples.last_flush) {
 679                 printf("Warning: Timestamp below last timeslice flush\n");
 680                 return -EINVAL;
 681         }
 682
 683         if (!list_empty(sc)) {
 684                 new = list_entry(sc->next, struct sample_queue, list);
 685                 list_del(&new->list);
 686         } else if (os->sample_buffer) {
 687                 new = os->sample_buffer + os->sample_buffer_idx;
 688                 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
 689                         os->sample_buffer = NULL;
 690         } else {
 691                 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
 692                 if (!os->sample_buffer)
 693                         return -ENOMEM;
 694                 list_add(&os->sample_buffer->list, &os->to_free);
 695                 os->sample_buffer_idx = 2;
 696                 new = os->sample_buffer + 1;
 697         }
 698
 699         new->timestamp = timestamp;
 700         new->file_offset = file_offset;
 701         new->event = event;
 702
 703         __queue_event(new, s);
 704
 705         return 0;
 706 }
 707
 708 static void callchain__printf(struct perf_sample *sample)
 709 {
 710         unsigned int i;
 711
 712         printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
 713
 714         for (i = 0; i < sample->callchain->nr; i++)
 715                 printf("..... %2d: %016" PRIx64 "\n",
 716                        i, sample->callchain->ips[i]);
 717 }
 718
 719 static void branch_stack__printf(struct perf_sample *sample)
 720 {
 721         uint64_t i;
 722
 723         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 724
 725         for (i = 0; i < sample->branch_stack->nr; i++)
 726                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
 727                         i, sample->branch_stack->entries[i].from,
 728                         sample->branch_stack->entries[i].to);
 729 }
 730
 731 static void regs_dump__printf(u64 mask, u64 *regs)
 732 {
 733         unsigned rid, i = 0;
 734
 735         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 736                 u64 val = regs[i++];
 737
 738                 printf(".... %-5s 0x%" PRIx64 "\n",
 739                        perf_reg_name(rid), val);
 740         }
 741 }
 742
 743 static void regs_user__printf(struct perf_sample *sample, u64 mask)
 744 {
 745         struct regs_dump *user_regs = &sample->user_regs;
 746
 747         if (user_regs->regs) {
 748                 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
 749                 regs_dump__printf(mask, user_regs->regs);
 750         }
 751 }
 752
 753 static void stack_user__printf(struct stack_dump *dump)
 754 {
 755         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 756                dump->size, dump->offset);
 757 }
 758
 759 static void perf_session__print_tstamp(struct perf_session *session,
 760                                        union perf_event *event,
 761                                        struct perf_sample *sample)
 762 {
 763         u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
 764
 765         if (event->header.type != PERF_RECORD_SAMPLE &&
 766             !perf_evlist__sample_id_all(session->evlist)) {
 767                 fputs("-1 -1 ", stdout);
 768                 return;
 769         }
 770
 771         if ((sample_type & PERF_SAMPLE_CPU))
 772                 printf("%u ", sample->cpu);
 773
 774         if (sample_type & PERF_SAMPLE_TIME)
 775                 printf("%" PRIu64 " ", sample->time);
 776 }
 777
 778 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
 779 {
 780         printf("... sample_read:\n");
 781
 782         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
 783                 printf("...... time enabled %016" PRIx64 "\n",
 784                        sample->read.time_enabled);
 785
 786         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
 787                 printf("...... time running %016" PRIx64 "\n",
 788                        sample->read.time_running);
 789
 790         if (read_format & PERF_FORMAT_GROUP) {
 791                 u64 i;
 792
 793                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
 794
 795                 for (i = 0; i < sample->read.group.nr; i++) {
 796                         struct sample_read_value *value;
 797
 798                         value = &sample->read.group.values[i];
 799                         printf("..... id %016" PRIx64
 800                                ", value %016" PRIx64 "\n",
 801                                value->id, value->value);
 802                 }
 803         } else
 804                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
 805                         sample->read.one.id, sample->read.one.value);
 806 }
 807
 808 static void dump_event(struct perf_session *session, union perf_event *event,
 809                        u64 file_offset, struct perf_sample *sample)
 810 {
 811         if (!dump_trace)
 812                 return;
 813
 814         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 815                file_offset, event->header.size, event->header.type);
 816
 817         trace_event(event);
 818
 819         if (sample)
 820                 perf_session__print_tstamp(session, event, sample);
 821
 822         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 823                event->header.size, perf_event__name(event->header.type));
 824 }
 825
 826 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 827                         struct perf_sample *sample)
 828 {
 829         u64 sample_type;
 830
 831         if (!dump_trace)
 832                 return;
 833
 834         printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 835                event->header.misc, sample->pid, sample->tid, sample->ip,
 836                sample->period, sample->addr);
 837
 838         sample_type = evsel->attr.sample_type;
 839
 840         if (sample_type & PERF_SAMPLE_CALLCHAIN)
 841                 callchain__printf(sample);
 842
 843         if (sample_type & PERF_SAMPLE_BRANCH_STACK)
 844                 branch_stack__printf(sample);
 845
 846         if (sample_type & PERF_SAMPLE_REGS_USER)
 847                 regs_user__printf(sample, evsel->attr.sample_regs_user);
 848
 849         if (sample_type & PERF_SAMPLE_STACK_USER)
 850                 stack_user__printf(&sample->user_stack);
 851
 852         if (sample_type & PERF_SAMPLE_WEIGHT)
 853                 printf("... weight: %" PRIu64 "\n", sample->weight);
 854
 855         if (sample_type & PERF_SAMPLE_DATA_SRC)
 856                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
 857
 858         if (sample_type & PERF_SAMPLE_READ)
 859                 sample_read__printf(sample, evsel->attr.read_format);
 860 }
 861
 862 static struct machine *
 863         perf_session__find_machine_for_cpumode(struct perf_session *session,
 864                                                union perf_event *event,
 865                                                struct perf_sample *sample)
 866 {
 867         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 868
 869         if (perf_guest &&
 870             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
 871              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
 872                 u32 pid;
 873
 874                 if (event->header.type == PERF_RECORD_MMAP
 875                     || event->header.type == PERF_RECORD_MMAP2)
 876                         pid = event->mmap.pid;
 877                 else
 878                         pid = sample->pid;
 879
 880                 return perf_session__findnew_machine(session, pid);
 881         }
 882
 883         return &session->machines.host;
 884 }
 885
 886 static int deliver_sample_value(struct perf_session *session,
 887                                 struct perf_tool *tool,
 888                                 union perf_event *event,
 889                                 struct perf_sample *sample,
 890                                 struct sample_read_value *v,
 891                                 struct machine *machine)
 892 {
 893         struct perf_sample_id *sid;
 894
 895         sid = perf_evlist__id2sid(session->evlist, v->id);
 896         if (sid) {
 897                 sample->id     = v->id;
 898                 sample->period = v->value - sid->period;
 899                 sid->period    = v->value;
 900         }
 901
 902         if (!sid || sid->evsel == NULL) {
 903                 ++session->stats.nr_unknown_id;
 904                 return 0;
 905         }
 906
 907         return tool->sample(tool, event, sample, sid->evsel, machine);
 908 }
 909
 910 static int deliver_sample_group(struct perf_session *session,
 911                                 struct perf_tool *tool,
 912                                 union  perf_event *event,
 913                                 struct perf_sample *sample,
 914                                 struct machine *machine)
 915 {
 916         int ret = -EINVAL;
 917         u64 i;
 918
 919         for (i = 0; i < sample->read.group.nr; i++) {
 920                 ret = deliver_sample_value(session, tool, event, sample,
 921                                            &sample->read.group.values[i],
 922                                            machine);
 923                 if (ret)
 924                         break;
 925         }
 926
 927         return ret;
 928 }
 929
 930 static int
 931 perf_session__deliver_sample(struct perf_session *session,
 932                              struct perf_tool *tool,
 933                              union  perf_event *event,
 934                              struct perf_sample *sample,
 935                              struct perf_evsel *evsel,
 936                              struct machine *machine)
 937 {
 938         /* We know evsel != NULL. */
 939         u64 sample_type = evsel->attr.sample_type;
 940         u64 read_format = evsel->attr.read_format;
 941
 942         /* Standard sample delievery. */
 943         if (!(sample_type & PERF_SAMPLE_READ))
 944                 return tool->sample(tool, event, sample, evsel, machine);
 945
 946         /* For PERF_SAMPLE_READ we have either single or group mode. */
 947         if (read_format & PERF_FORMAT_GROUP)
 948                 return deliver_sample_group(session, tool, event, sample,
 949                                             machine);
 950         else
 951                 return deliver_sample_value(session, tool, event, sample,
 952                                             &sample->read.one, machine);
 953 }
 954
 955 static int perf_session_deliver_event(struct perf_session *session,
 956                                       union perf_event *event,
 957                                       struct perf_sample *sample,
 958                                       struct perf_tool *tool,
 959                                       u64 file_offset)
 960 {
 961         struct perf_evsel *evsel;
 962         struct machine *machine;
 963
 964         dump_event(session, event, file_offset, sample);
 965
 966         evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 967         if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
 968                 /*
 969                  * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
 970                  * because the tools right now may apply filters, discarding
 971                  * some of the samples. For consistency, in the future we
 972                  * should have something like nr_filtered_samples and remove
 973                  * the sample->period from total_sample_period, etc, KISS for
 974                  * now tho.
 975                  *
 976                  * Also testing against NULL allows us to handle files without
 977                  * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
 978                  * future probably it'll be a good idea to restrict event
 979                  * processing via perf_session to files with both set.
 980                  */
 981                 hists__inc_nr_events(&evsel->hists, event->header.type);
 982         }
 983
 984         machine = perf_session__find_machine_for_cpumode(session, event,
 985                                                          sample);
 986
 987         switch (event->header.type) {
 988         case PERF_RECORD_SAMPLE:
 989                 dump_sample(evsel, event, sample);
 990                 if (evsel == NULL) {
 991                         ++session->stats.nr_unknown_id;
 992                         return 0;
 993                 }
 994                 if (machine == NULL) {
 995                         ++session->stats.nr_unprocessable_samples;
 996                         return 0;
 997                 }
 998                 return perf_session__deliver_sample(session, tool, event,
 999                                                     sample, evsel, machine);
1000         case PERF_RECORD_MMAP:
1001                 return tool->mmap(tool, event, sample, machine);
1002         case PERF_RECORD_MMAP2:
1003                 return tool->mmap2(tool, event, sample, machine);
1004         case PERF_RECORD_COMM:
1005                 return tool->comm(tool, event, sample, machine);
1006         case PERF_RECORD_FORK:
1007                 return tool->fork(tool, event, sample, machine);
1008         case PERF_RECORD_EXIT:
1009                 return tool->exit(tool, event, sample, machine);
1010         case PERF_RECORD_LOST:
1011                 if (tool->lost == perf_event__process_lost)
1012                         session->stats.total_lost += event->lost.lost;
1013                 return tool->lost(tool, event, sample, machine);
1014         case PERF_RECORD_READ:
1015                 return tool->read(tool, event, sample, evsel, machine);
1016         case PERF_RECORD_THROTTLE:
1017                 return tool->throttle(tool, event, sample, machine);
1018         case PERF_RECORD_UNTHROTTLE:
1019                 return tool->unthrottle(tool, event, sample, machine);
1020         default:
1021                 ++session->stats.nr_unknown_events;
1022                 return -1;
1023         }
1024 }
1025
1026 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
1027                                             struct perf_tool *tool, u64 file_offset)
1028 {
1029         int err;
1030
1031         dump_event(session, event, file_offset, NULL);
1032
1033         /* These events are processed right away */
1034         switch (event->header.type) {
1035         case PERF_RECORD_HEADER_ATTR:
1036                 err = tool->attr(tool, event, &session->evlist);
1037                 if (err == 0)
1038                         perf_session__set_id_hdr_size(session);
1039                 return err;
1040         case PERF_RECORD_HEADER_TRACING_DATA:
1041                 /* setup for reading amidst mmap */
1042                 lseek(session->fd, file_offset, SEEK_SET);
1043                 return tool->tracing_data(tool, event, session);
1044         case PERF_RECORD_HEADER_BUILD_ID:
1045                 return tool->build_id(tool, event, session);
1046         case PERF_RECORD_FINISHED_ROUND:
1047                 return tool->finished_round(tool, event, session);
1048         default:
1049                 return -EINVAL;
1050         }
1051 }
1052
1053 static void event_swap(union perf_event *event, bool sample_id_all)
1054 {
1055         perf_event__swap_op swap;
1056
1057         swap = perf_event__swap_ops[event->header.type];
1058         if (swap)
1059                 swap(event, sample_id_all);
1060 }
1061
1062 static int perf_session__process_event(struct perf_session *session,
1063                                        union perf_event *event,
1064                                        struct perf_tool *tool,
1065                                        u64 file_offset)
1066 {
1067         struct perf_sample sample;
1068         int ret;
1069
1070         if (session->header.needs_swap)
1071                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1072
1073         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1074                 return -EINVAL;
1075
1076         events_stats__inc(&session->stats, event->header.type);
1077
1078         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1079                 return perf_session__process_user_event(session, event, tool, file_offset);
1080
1081         /*
1082          * For all kernel events we get the sample data
1083          */
1084         ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1085         if (ret)
1086                 return ret;
1087
1088         if (tool->ordered_samples) {
1089                 ret = perf_session_queue_event(session, event, &sample,
1090                                                file_offset);
1091                 if (ret != -ETIME)
1092                         return ret;
1093         }
1094
1095         return perf_session_deliver_event(session, event, &sample, tool,
1096                                           file_offset);
1097 }
1098
1099 void perf_event_header__bswap(struct perf_event_header *self)
1100 {
1101         self->type = bswap_32(self->type);
1102         self->misc = bswap_16(self->misc);
1103         self->size = bswap_16(self->size);
1104 }
1105
1106 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1107 {
1108         return machine__findnew_thread(&session->machines.host, 0, pid);
1109 }
1110
1111 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
1112 {
1113         struct thread *thread = perf_session__findnew(self, 0);
1114
1115         if (thread == NULL || thread__set_comm(thread, "swapper")) {
1116                 pr_err("problem inserting idle task.\n");
1117                 thread = NULL;
1118         }
1119
1120         return thread;
1121 }
1122
1123 static void perf_session__warn_about_errors(const struct perf_session *session,
1124                                             const struct perf_tool *tool)
1125 {
1126         if (tool->lost == perf_event__process_lost &&
1127             session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1128                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1129                             "Check IO/CPU overload!\n\n",
1130                             session->stats.nr_events[0],
1131                             session->stats.nr_events[PERF_RECORD_LOST]);
1132         }
1133
1134         if (session->stats.nr_unknown_events != 0) {
1135                 ui__warning("Found %u unknown events!\n\n"
1136                             "Is this an older tool processing a perf.data "
1137                             "file generated by a more recent tool?\n\n"
1138                             "If that is not the case, consider "
1139                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1140                             session->stats.nr_unknown_events);
1141         }
1142
1143         if (session->stats.nr_unknown_id != 0) {
1144                 ui__warning("%u samples with id not present in the header\n",
1145                             session->stats.nr_unknown_id);
1146         }
1147
1148         if (session->stats.nr_invalid_chains != 0) {
1149                 ui__warning("Found invalid callchains!\n\n"
1150                             "%u out of %u events were discarded for this reason.\n\n"
1151                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1152                             session->stats.nr_invalid_chains,
1153                             session->stats.nr_events[PERF_RECORD_SAMPLE]);
1154         }
1155
1156         if (session->stats.nr_unprocessable_samples != 0) {
1157                 ui__warning("%u unprocessable samples recorded.\n"
1158                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1159                             session->stats.nr_unprocessable_samples);
1160         }
1161 }
1162
1163 #define session_done()  (*(volatile int *)(&session_done))
1164 volatile int session_done;
1165
1166 static int __perf_session__process_pipe_events(struct perf_session *self,
1167                                                struct perf_tool *tool)
1168 {
1169         union perf_event *event;
1170         uint32_t size, cur_size = 0;
1171         void *buf = NULL;
1172         int skip = 0;
1173         u64 head;
1174         int err;
1175         void *p;
1176
1177         perf_tool__fill_defaults(tool);
1178
1179         head = 0;
1180         cur_size = sizeof(union perf_event);
1181
1182         buf = malloc(cur_size);
1183         if (!buf)
1184                 return -errno;
1185 more:
1186         event = buf;
1187         err = readn(self->fd, event, sizeof(struct perf_event_header));
1188         if (err <= 0) {
1189                 if (err == 0)
1190                         goto done;
1191
1192                 pr_err("failed to read event header\n");
1193                 goto out_err;
1194         }
1195
1196         if (self->header.needs_swap)
1197                 perf_event_header__bswap(&event->header);
1198
1199         size = event->header.size;
1200         if (size < sizeof(struct perf_event_header)) {
1201                 pr_err("bad event header size\n");
1202                 goto out_err;
1203         }
1204
1205         if (size > cur_size) {
1206                 void *new = realloc(buf, size);
1207                 if (!new) {
1208                         pr_err("failed to allocate memory to read event\n");
1209                         goto out_err;
1210                 }
1211                 buf = new;
1212                 cur_size = size;
1213                 event = buf;
1214         }
1215         p = event;
1216         p += sizeof(struct perf_event_header);
1217
1218         if (size - sizeof(struct perf_event_header)) {
1219                 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
1220                 if (err <= 0) {
1221                         if (err == 0) {
1222                                 pr_err("unexpected end of event stream\n");
1223                                 goto done;
1224                         }
1225
1226                         pr_err("failed to read event data\n");
1227                         goto out_err;
1228                 }
1229         }
1230
1231         if ((skip = perf_session__process_event(self, event, tool, head)) < 0) {
1232                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1233                        head, event->header.size, event->header.type);
1234                 err = -EINVAL;
1235                 goto out_err;
1236         }
1237
1238         head += size;
1239
1240         if (skip > 0)
1241                 head += skip;
1242
1243         if (!session_done())
1244                 goto more;
1245 done:
1246         err = 0;
1247 out_err:
1248         free(buf);
1249         perf_session__warn_about_errors(self, tool);
1250         perf_session_free_sample_buffers(self);
1251         return err;
1252 }
1253
1254 static union perf_event *
1255 fetch_mmaped_event(struct perf_session *session,
1256                    u64 head, size_t mmap_size, char *buf)
1257 {
1258         union perf_event *event;
1259
1260         /*
1261          * Ensure we have enough space remaining to read
1262          * the size of the event in the headers.
1263          */
1264         if (head + sizeof(event->header) > mmap_size)
1265                 return NULL;
1266
1267         event = (union perf_event *)(buf + head);
1268
1269         if (session->header.needs_swap)
1270                 perf_event_header__bswap(&event->header);
1271
1272         if (head + event->header.size > mmap_size) {
1273                 /* We're not fetching the event so swap back again */
1274                 if (session->header.needs_swap)
1275                         perf_event_header__bswap(&event->header);
1276                 return NULL;
1277         }
1278
1279         return event;
1280 }
1281
1282 /*
1283  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1284  * slices. On 32bit we use 32MB.
1285  */
1286 #if BITS_PER_LONG == 64
1287 #define MMAP_SIZE ULLONG_MAX
1288 #define NUM_MMAPS 1
1289 #else
1290 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1291 #define NUM_MMAPS 128
1292 #endif
1293
1294 int __perf_session__process_events(struct perf_session *session,
1295                                    u64 data_offset, u64 data_size,
1296                                    u64 file_size, struct perf_tool *tool)
1297 {
1298         u64 head, page_offset, file_offset, file_pos, progress_next;
1299         int err, mmap_prot, mmap_flags, map_idx = 0;
1300         size_t  mmap_size;
1301         char *buf, *mmaps[NUM_MMAPS];
1302         union perf_event *event;
1303         uint32_t size;
1304
1305         perf_tool__fill_defaults(tool);
1306
1307         page_offset = page_size * (data_offset / page_size);
1308         file_offset = page_offset;
1309         head = data_offset - page_offset;
1310
1311         if (data_offset + data_size < file_size)
1312                 file_size = data_offset + data_size;
1313
1314         progress_next = file_size / 16;
1315
1316         mmap_size = MMAP_SIZE;
1317         if (mmap_size > file_size)
1318                 mmap_size = file_size;
1319
1320         memset(mmaps, 0, sizeof(mmaps));
1321
1322         mmap_prot  = PROT_READ;
1323         mmap_flags = MAP_SHARED;
1324
1325         if (session->header.needs_swap) {
1326                 mmap_prot  |= PROT_WRITE;
1327                 mmap_flags = MAP_PRIVATE;
1328         }
1329 remap:
1330         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
1331                    file_offset);
1332         if (buf == MAP_FAILED) {
1333                 pr_err("failed to mmap file\n");
1334                 err = -errno;
1335                 goto out_err;
1336         }
1337         mmaps[map_idx] = buf;
1338         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1339         file_pos = file_offset + head;
1340
1341 more:
1342         event = fetch_mmaped_event(session, head, mmap_size, buf);
1343         if (!event) {
1344                 if (mmaps[map_idx]) {
1345                         munmap(mmaps[map_idx], mmap_size);
1346                         mmaps[map_idx] = NULL;
1347                 }
1348
1349                 page_offset = page_size * (head / page_size);
1350                 file_offset += page_offset;
1351                 head -= page_offset;
1352                 goto remap;
1353         }
1354
1355         size = event->header.size;
1356
1357         if (size < sizeof(struct perf_event_header) ||
1358             perf_session__process_event(session, event, tool, file_pos) < 0) {
1359                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1360                        file_offset + head, event->header.size,
1361                        event->header.type);
1362                 err = -EINVAL;
1363                 goto out_err;
1364         }
1365
1366         head += size;
1367         file_pos += size;
1368
1369         if (file_pos >= progress_next) {
1370                 progress_next += file_size / 16;
1371                 ui_progress__update(file_pos, file_size,
1372                                     "Processing events...");
1373         }
1374
1375         if (file_pos < file_size)
1376                 goto more;
1377
1378         err = 0;
1379         /* do the final flush for ordered samples */
1380         session->ordered_samples.next_flush = ULLONG_MAX;
1381         err = flush_sample_queue(session, tool);
1382 out_err:
1383         ui_progress__finish();
1384         perf_session__warn_about_errors(session, tool);
1385         perf_session_free_sample_buffers(session);
1386         return err;
1387 }
1388
1389 int perf_session__process_events(struct perf_session *self,
1390                                  struct perf_tool *tool)
1391 {
1392         int err;
1393
1394         if (perf_session__register_idle_thread(self) == NULL)
1395                 return -ENOMEM;
1396
1397         if (!self->fd_pipe)
1398                 err = __perf_session__process_events(self,
1399                                                      self->header.data_offset,
1400                                                      self->header.data_size,
1401                                                      self->size, tool);
1402         else
1403                 err = __perf_session__process_pipe_events(self, tool);
1404
1405         return err;
1406 }
1407
1408 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1409 {
1410         struct perf_evsel *evsel;
1411
1412         list_for_each_entry(evsel, &session->evlist->entries, node) {
1413                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1414                         return true;
1415         }
1416
1417         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1418         return false;
1419 }
1420
1421 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1422                                      const char *symbol_name, u64 addr)
1423 {
1424         char *bracket;
1425         enum map_type i;
1426         struct ref_reloc_sym *ref;
1427
1428         ref = zalloc(sizeof(struct ref_reloc_sym));
1429         if (ref == NULL)
1430                 return -ENOMEM;
1431
1432         ref->name = strdup(symbol_name);
1433         if (ref->name == NULL) {
1434                 free(ref);
1435                 return -ENOMEM;
1436         }
1437
1438         bracket = strchr(ref->name, ']');
1439         if (bracket)
1440                 *bracket = '\0';
1441
1442         ref->addr = addr;
1443
1444         for (i = 0; i < MAP__NR_TYPES; ++i) {
1445                 struct kmap *kmap = map__kmap(maps[i]);
1446                 kmap->ref_reloc_sym = ref;
1447         }
1448
1449         return 0;
1450 }
1451
1452 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1453 {
1454         return machines__fprintf_dsos(&self->machines, fp);
1455 }
1456
1457 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1458                                           bool (skip)(struct dso *dso, int parm), int parm)
1459 {
1460         return machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm);
1461 }
1462
1463 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1464 {
1465         struct perf_evsel *pos;
1466         size_t ret = fprintf(fp, "Aggregated stats:\n");
1467
1468         ret += events_stats__fprintf(&session->stats, fp);
1469
1470         list_for_each_entry(pos, &session->evlist->entries, node) {
1471                 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1472                 ret += events_stats__fprintf(&pos->hists.stats, fp);
1473         }
1474
1475         return ret;
1476 }
1477
1478 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1479 {
1480         /*
1481          * FIXME: Here we have to actually print all the machines in this
1482          * session, not just the host...
1483          */
1484         return machine__fprintf(&session->machines.host, fp);
1485 }
1486
1487 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1488                                               unsigned int type)
1489 {
1490         struct perf_evsel *pos;
1491
1492         list_for_each_entry(pos, &session->evlist->entries, node) {
1493                 if (pos->attr.type == type)
1494                         return pos;
1495         }
1496         return NULL;
1497 }
1498
1499 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
1500                           struct perf_sample *sample, struct machine *machine,
1501                           unsigned int print_opts, unsigned int stack_depth)
1502 {
1503         struct addr_location al;
1504         struct callchain_cursor_node *node;
1505         int print_ip = print_opts & PRINT_IP_OPT_IP;
1506         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1507         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1508         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1509         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1510         char s = print_oneline ? ' ' : '\t';
1511
1512         if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
1513                 error("problem processing %d event, skipping it.\n",
1514                         event->header.type);
1515                 return;
1516         }
1517
1518         if (symbol_conf.use_callchain && sample->callchain) {
1519
1520                 if (machine__resolve_callchain(machine, evsel, al.thread,
1521                                                sample, NULL, NULL) != 0) {
1522                         if (verbose)
1523                                 error("Failed to resolve callchain. Skipping\n");
1524                         return;
1525                 }
1526                 callchain_cursor_commit(&callchain_cursor);
1527
1528                 while (stack_depth) {
1529                         node = callchain_cursor_current(&callchain_cursor);
1530                         if (!node)
1531                                 break;
1532
1533                         if (print_ip)
1534                                 printf("%c%16" PRIx64, s, node->ip);
1535
1536                         if (print_sym) {
1537                                 printf(" ");
1538                                 if (print_symoffset) {
1539                                         al.addr = node->ip;
1540                                         al.map  = node->map;
1541                                         symbol__fprintf_symname_offs(node->sym, &al, stdout);
1542                                 } else
1543                                         symbol__fprintf_symname(node->sym, stdout);
1544                         }
1545
1546                         if (print_dso) {
1547                                 printf(" (");
1548                                 map__fprintf_dsoname(node->map, stdout);
1549                                 printf(")");
1550                         }
1551
1552                         if (!print_oneline)
1553                                 printf("\n");
1554
1555                         callchain_cursor_advance(&callchain_cursor);
1556
1557                         stack_depth--;
1558                 }
1559
1560         } else {
1561                 if (print_ip)
1562                         printf("%16" PRIx64, sample->ip);
1563
1564                 if (print_sym) {
1565                         printf(" ");
1566                         if (print_symoffset)
1567                                 symbol__fprintf_symname_offs(al.sym, &al,
1568                                                              stdout);
1569                         else
1570                                 symbol__fprintf_symname(al.sym, stdout);
1571                 }
1572
1573                 if (print_dso) {
1574                         printf(" (");
1575                         map__fprintf_dsoname(al.map, stdout);
1576                         printf(")");
1577                 }
1578         }
1579 }
1580
1581 int perf_session__cpu_bitmap(struct perf_session *session,
1582                              const char *cpu_list, unsigned long *cpu_bitmap)
1583 {
1584         int i;
1585         struct cpu_map *map;
1586
1587         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1588                 struct perf_evsel *evsel;
1589
1590                 evsel = perf_session__find_first_evtype(session, i);
1591                 if (!evsel)
1592                         continue;
1593
1594                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1595                         pr_err("File does not contain CPU events. "
1596                                "Remove -c option to proceed.\n");
1597                         return -1;
1598                 }
1599         }
1600
1601         map = cpu_map__new(cpu_list);
1602         if (map == NULL) {
1603                 pr_err("Invalid cpu_list\n");
1604                 return -1;
1605         }
1606
1607         for (i = 0; i < map->nr; i++) {
1608                 int cpu = map->map[i];
1609
1610                 if (cpu >= MAX_NR_CPUS) {
1611                         pr_err("Requested CPU %d too large. "
1612                                "Consider raising MAX_NR_CPUS\n", cpu);
1613                         return -1;
1614                 }
1615
1616                 set_bit(cpu, cpu_bitmap);
1617         }
1618
1619         return 0;
1620 }
1621
1622 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1623                                 bool full)
1624 {
1625         struct stat st;
1626         int ret;
1627
1628         if (session == NULL || fp == NULL)
1629                 return;
1630
1631         ret = fstat(session->fd, &st);
1632         if (ret == -1)
1633                 return;
1634
1635         fprintf(fp, "# ========\n");
1636         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1637         perf_header__fprintf_info(session, fp, full);
1638         fprintf(fp, "# ========\n#\n");
1639 }
1640
1641
1642 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1643                                              const struct perf_evsel_str_handler *assocs,
1644                                              size_t nr_assocs)
1645 {
1646         struct perf_evsel *evsel;
1647         size_t i;
1648         int err;
1649
1650         for (i = 0; i < nr_assocs; i++) {
1651                 /*
1652                  * Adding a handler for an event not in the session,
1653                  * just ignore it.
1654                  */
1655                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1656                 if (evsel == NULL)
1657                         continue;
1658
1659                 err = -EEXIST;
1660                 if (evsel->handler.func != NULL)
1661                         goto out;
1662                 evsel->handler.func = assocs[i].handler;
1663         }
1664
1665         err = 0;
1666 out:
1667         return err;
1668 }