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