tools/perf/util/session.c

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