tools/perf/util/session.c

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