tools/perf/util/session.c

   1 #include <linux/kernel.h>
   2 #include <traceevent/event-parse.h>
   3
   4 #include <byteswap.h>
   5 #include <unistd.h>
   6 #include <sys/types.h>
   7 #include <sys/mman.h>
   8
   9 #include "evlist.h"
  10 #include "evsel.h"
  11 #include "session.h"
  12 #include "tool.h"
  13 #include "sort.h"
  14 #include "util.h"
  15 #include "cpumap.h"
  16 #include "perf_regs.h"
  17 #include "asm/bug.h"
  18
  19 static int perf_session__open(struct perf_session *session)
  20 {
  21         struct perf_data_file *file = session->file;
  22
  23         if (perf_session__read_header(session) < 0) {
  24                 pr_err("incompatible file format (rerun with -v to learn more)");
  25                 return -1;
  26         }
  27
  28         if (perf_data_file__is_pipe(file))
  29                 return 0;
  30
  31         if (!perf_evlist__valid_sample_type(session->evlist)) {
  32                 pr_err("non matching sample_type");
  33                 return -1;
  34         }
  35
  36         if (!perf_evlist__valid_sample_id_all(session->evlist)) {
  37                 pr_err("non matching sample_id_all");
  38                 return -1;
  39         }
  40
  41         if (!perf_evlist__valid_read_format(session->evlist)) {
  42                 pr_err("non matching read_format");
  43                 return -1;
  44         }
  45
  46         return 0;
  47 }
  48
  49 void perf_session__set_id_hdr_size(struct perf_session *session)
  50 {
  51         u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
  52
  53         machines__set_id_hdr_size(&session->machines, id_hdr_size);
  54 }
  55
  56 int perf_session__create_kernel_maps(struct perf_session *session)
  57 {
  58         int ret = machine__create_kernel_maps(&session->machines.host);
  59
  60         if (ret >= 0)
  61                 ret = machines__create_guest_kernel_maps(&session->machines);
  62         return ret;
  63 }
  64
  65 static void perf_session__destroy_kernel_maps(struct perf_session *session)
  66 {
  67         machines__destroy_kernel_maps(&session->machines);
  68 }
  69
  70 static bool perf_session__has_comm_exec(struct perf_session *session)
  71 {
  72         struct perf_evsel *evsel;
  73
  74         evlist__for_each(session->evlist, evsel) {
  75                 if (evsel->attr.comm_exec)
  76                         return true;
  77         }
  78
  79         return false;
  80 }
  81
  82 static void perf_session__set_comm_exec(struct perf_session *session)
  83 {
  84         bool comm_exec = perf_session__has_comm_exec(session);
  85
  86         machines__set_comm_exec(&session->machines, comm_exec);
  87 }
  88
  89 struct perf_session *perf_session__new(struct perf_data_file *file,
  90                                        bool repipe, struct perf_tool *tool)
  91 {
  92         struct perf_session *session = zalloc(sizeof(*session));
  93
  94         if (!session)
  95                 goto out;
  96
  97         session->repipe = repipe;
  98         ordered_events__init(&session->ordered_events);
  99         machines__init(&session->machines);
 100
 101         if (file) {
 102                 if (perf_data_file__open(file))
 103                         goto out_delete;
 104
 105                 session->file = file;
 106
 107                 if (perf_data_file__is_read(file)) {
 108                         if (perf_session__open(session) < 0)
 109                                 goto out_close;
 110
 111                         perf_session__set_id_hdr_size(session);
 112                         perf_session__set_comm_exec(session);
 113                 }
 114         }
 115
 116         if (!file || perf_data_file__is_write(file)) {
 117                 /*
 118                  * In O_RDONLY mode this will be performed when reading the
 119                  * kernel MMAP event, in perf_event__process_mmap().
 120                  */
 121                 if (perf_session__create_kernel_maps(session) < 0)
 122                         pr_warning("Cannot read kernel map\n");
 123         }
 124
 125         if (tool && tool->ordering_requires_timestamps &&
 126             tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
 127                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 128                 tool->ordered_events = false;
 129         }
 130
 131         return session;
 132
 133  out_close:
 134         perf_data_file__close(file);
 135  out_delete:
 136         perf_session__delete(session);
 137  out:
 138         return NULL;
 139 }
 140
 141 static void perf_session__delete_dead_threads(struct perf_session *session)
 142 {
 143         machine__delete_dead_threads(&session->machines.host);
 144 }
 145
 146 static void perf_session__delete_threads(struct perf_session *session)
 147 {
 148         machine__delete_threads(&session->machines.host);
 149 }
 150
 151 static void perf_session_env__delete(struct perf_session_env *env)
 152 {
 153         zfree(&env->hostname);
 154         zfree(&env->os_release);
 155         zfree(&env->version);
 156         zfree(&env->arch);
 157         zfree(&env->cpu_desc);
 158         zfree(&env->cpuid);
 159
 160         zfree(&env->cmdline);
 161         zfree(&env->sibling_cores);
 162         zfree(&env->sibling_threads);
 163         zfree(&env->numa_nodes);
 164         zfree(&env->pmu_mappings);
 165 }
 166
 167 void perf_session__delete(struct perf_session *session)
 168 {
 169         perf_session__destroy_kernel_maps(session);
 170         perf_session__delete_dead_threads(session);
 171         perf_session__delete_threads(session);
 172         perf_session_env__delete(&session->header.env);
 173         machines__exit(&session->machines);
 174         if (session->file)
 175                 perf_data_file__close(session->file);
 176         free(session);
 177 }
 178
 179 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 180                                                  __maybe_unused,
 181                                                  union perf_event *event
 182                                                  __maybe_unused,
 183                                                  struct perf_session *session
 184                                                 __maybe_unused)
 185 {
 186         dump_printf(": unhandled!\n");
 187         return 0;
 188 }
 189
 190 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 191                                          union perf_event *event __maybe_unused,
 192                                          struct perf_evlist **pevlist
 193                                          __maybe_unused)
 194 {
 195         dump_printf(": unhandled!\n");
 196         return 0;
 197 }
 198
 199 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 200                                      union perf_event *event __maybe_unused,
 201                                      struct perf_sample *sample __maybe_unused,
 202                                      struct perf_evsel *evsel __maybe_unused,
 203                                      struct machine *machine __maybe_unused)
 204 {
 205         dump_printf(": unhandled!\n");
 206         return 0;
 207 }
 208
 209 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 210                               union perf_event *event __maybe_unused,
 211                               struct perf_sample *sample __maybe_unused,
 212                               struct machine *machine __maybe_unused)
 213 {
 214         dump_printf(": unhandled!\n");
 215         return 0;
 216 }
 217
 218 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 219                                        union perf_event *event __maybe_unused,
 220                                        struct perf_session *perf_session
 221                                        __maybe_unused)
 222 {
 223         dump_printf(": unhandled!\n");
 224         return 0;
 225 }
 226
 227 static int process_finished_round(struct perf_tool *tool,
 228                                   union perf_event *event,
 229                                   struct perf_session *session);
 230
 231 void perf_tool__fill_defaults(struct perf_tool *tool)
 232 {
 233         if (tool->sample == NULL)
 234                 tool->sample = process_event_sample_stub;
 235         if (tool->mmap == NULL)
 236                 tool->mmap = process_event_stub;
 237         if (tool->mmap2 == NULL)
 238                 tool->mmap2 = process_event_stub;
 239         if (tool->comm == NULL)
 240                 tool->comm = process_event_stub;
 241         if (tool->fork == NULL)
 242                 tool->fork = process_event_stub;
 243         if (tool->exit == NULL)
 244                 tool->exit = process_event_stub;
 245         if (tool->lost == NULL)
 246                 tool->lost = perf_event__process_lost;
 247         if (tool->read == NULL)
 248                 tool->read = process_event_sample_stub;
 249         if (tool->throttle == NULL)
 250                 tool->throttle = process_event_stub;
 251         if (tool->unthrottle == NULL)
 252                 tool->unthrottle = process_event_stub;
 253         if (tool->attr == NULL)
 254                 tool->attr = process_event_synth_attr_stub;
 255         if (tool->tracing_data == NULL)
 256                 tool->tracing_data = process_event_synth_tracing_data_stub;
 257         if (tool->build_id == NULL)
 258                 tool->build_id = process_finished_round_stub;
 259         if (tool->finished_round == NULL) {
 260                 if (tool->ordered_events)
 261                         tool->finished_round = process_finished_round;
 262                 else
 263                         tool->finished_round = process_finished_round_stub;
 264         }
 265 }
 266
 267 static void swap_sample_id_all(union perf_event *event, void *data)
 268 {
 269         void *end = (void *) event + event->header.size;
 270         int size = end - data;
 271
 272         BUG_ON(size % sizeof(u64));
 273         mem_bswap_64(data, size);
 274 }
 275
 276 static void perf_event__all64_swap(union perf_event *event,
 277                                    bool sample_id_all __maybe_unused)
 278 {
 279         struct perf_event_header *hdr = &event->header;
 280         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 281 }
 282
 283 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 284 {
 285         event->comm.pid = bswap_32(event->comm.pid);
 286         event->comm.tid = bswap_32(event->comm.tid);
 287
 288         if (sample_id_all) {
 289                 void *data = &event->comm.comm;
 290
 291                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 292                 swap_sample_id_all(event, data);
 293         }
 294 }
 295
 296 static void perf_event__mmap_swap(union perf_event *event,
 297                                   bool sample_id_all)
 298 {
 299         event->mmap.pid   = bswap_32(event->mmap.pid);
 300         event->mmap.tid   = bswap_32(event->mmap.tid);
 301         event->mmap.start = bswap_64(event->mmap.start);
 302         event->mmap.len   = bswap_64(event->mmap.len);
 303         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 304
 305         if (sample_id_all) {
 306                 void *data = &event->mmap.filename;
 307
 308                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 309                 swap_sample_id_all(event, data);
 310         }
 311 }
 312
 313 static void perf_event__mmap2_swap(union perf_event *event,
 314                                   bool sample_id_all)
 315 {
 316         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 317         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 318         event->mmap2.start = bswap_64(event->mmap2.start);
 319         event->mmap2.len   = bswap_64(event->mmap2.len);
 320         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 321         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 322         event->mmap2.min   = bswap_32(event->mmap2.min);
 323         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 324
 325         if (sample_id_all) {
 326                 void *data = &event->mmap2.filename;
 327
 328                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 329                 swap_sample_id_all(event, data);
 330         }
 331 }
 332 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 333 {
 334         event->fork.pid  = bswap_32(event->fork.pid);
 335         event->fork.tid  = bswap_32(event->fork.tid);
 336         event->fork.ppid = bswap_32(event->fork.ppid);
 337         event->fork.ptid = bswap_32(event->fork.ptid);
 338         event->fork.time = bswap_64(event->fork.time);
 339
 340         if (sample_id_all)
 341                 swap_sample_id_all(event, &event->fork + 1);
 342 }
 343
 344 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 345 {
 346         event->read.pid          = bswap_32(event->read.pid);
 347         event->read.tid          = bswap_32(event->read.tid);
 348         event->read.value        = bswap_64(event->read.value);
 349         event->read.time_enabled = bswap_64(event->read.time_enabled);
 350         event->read.time_running = bswap_64(event->read.time_running);
 351         event->read.id           = bswap_64(event->read.id);
 352
 353         if (sample_id_all)
 354                 swap_sample_id_all(event, &event->read + 1);
 355 }
 356
 357 static void perf_event__throttle_swap(union perf_event *event,
 358                                       bool sample_id_all)
 359 {
 360         event->throttle.time      = bswap_64(event->throttle.time);
 361         event->throttle.id        = bswap_64(event->throttle.id);
 362         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 363
 364         if (sample_id_all)
 365                 swap_sample_id_all(event, &event->throttle + 1);
 366 }
 367
 368 static u8 revbyte(u8 b)
 369 {
 370         int rev = (b >> 4) | ((b & 0xf) << 4);
 371         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 372         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 373         return (u8) rev;
 374 }
 375
 376 /*
 377  * XXX this is hack in attempt to carry flags bitfield
 378  * throught endian village. ABI says:
 379  *
 380  * Bit-fields are allocated from right to left (least to most significant)
 381  * on little-endian implementations and from left to right (most to least
 382  * significant) on big-endian implementations.
 383  *
 384  * The above seems to be byte specific, so we need to reverse each
 385  * byte of the bitfield. 'Internet' also says this might be implementation
 386  * specific and we probably need proper fix and carry perf_event_attr
 387  * bitfield flags in separate data file FEAT_ section. Thought this seems
 388  * to work for now.
 389  */
 390 static void swap_bitfield(u8 *p, unsigned len)
 391 {
 392         unsigned i;
 393
 394         for (i = 0; i < len; i++) {
 395                 *p = revbyte(*p);
 396                 p++;
 397         }
 398 }
 399
 400 /* exported for swapping attributes in file header */
 401 void perf_event__attr_swap(struct perf_event_attr *attr)
 402 {
 403         attr->type              = bswap_32(attr->type);
 404         attr->size              = bswap_32(attr->size);
 405         attr->config            = bswap_64(attr->config);
 406         attr->sample_period     = bswap_64(attr->sample_period);
 407         attr->sample_type       = bswap_64(attr->sample_type);
 408         attr->read_format       = bswap_64(attr->read_format);
 409         attr->wakeup_events     = bswap_32(attr->wakeup_events);
 410         attr->bp_type           = bswap_32(attr->bp_type);
 411         attr->bp_addr           = bswap_64(attr->bp_addr);
 412         attr->bp_len            = bswap_64(attr->bp_len);
 413         attr->branch_sample_type = bswap_64(attr->branch_sample_type);
 414         attr->sample_regs_user   = bswap_64(attr->sample_regs_user);
 415         attr->sample_stack_user  = bswap_32(attr->sample_stack_user);
 416
 417         swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
 418 }
 419
 420 static void perf_event__hdr_attr_swap(union perf_event *event,
 421                                       bool sample_id_all __maybe_unused)
 422 {
 423         size_t size;
 424
 425         perf_event__attr_swap(&event->attr.attr);
 426
 427         size = event->header.size;
 428         size -= (void *)&event->attr.id - (void *)event;
 429         mem_bswap_64(event->attr.id, size);
 430 }
 431
 432 static void perf_event__event_type_swap(union perf_event *event,
 433                                         bool sample_id_all __maybe_unused)
 434 {
 435         event->event_type.event_type.event_id =
 436                 bswap_64(event->event_type.event_type.event_id);
 437 }
 438
 439 static void perf_event__tracing_data_swap(union perf_event *event,
 440                                           bool sample_id_all __maybe_unused)
 441 {
 442         event->tracing_data.size = bswap_32(event->tracing_data.size);
 443 }
 444
 445 typedef void (*perf_event__swap_op)(union perf_event *event,
 446                                     bool sample_id_all);
 447
 448 static perf_event__swap_op perf_event__swap_ops[] = {
 449         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 450         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 451         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 452         [PERF_RECORD_FORK]                = perf_event__task_swap,
 453         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 454         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 455         [PERF_RECORD_READ]                = perf_event__read_swap,
 456         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 457         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 458         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 459         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 460         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 461         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 462         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 463         [PERF_RECORD_HEADER_MAX]          = NULL,
 464 };
 465
 466 /*
 467  * When perf record finishes a pass on every buffers, it records this pseudo
 468  * event.
 469  * We record the max timestamp t found in the pass n.
 470  * Assuming these timestamps are monotonic across cpus, we know that if
 471  * a buffer still has events with timestamps below t, they will be all
 472  * available and then read in the pass n + 1.
 473  * Hence when we start to read the pass n + 2, we can safely flush every
 474  * events with timestamps below t.
 475  *
 476  *    ============ PASS n =================
 477  *       CPU 0         |   CPU 1
 478  *                     |
 479  *    cnt1 timestamps  |   cnt2 timestamps
 480  *          1          |         2
 481  *          2          |         3
 482  *          -          |         4  <--- max recorded
 483  *
 484  *    ============ PASS n + 1 ==============
 485  *       CPU 0         |   CPU 1
 486  *                     |
 487  *    cnt1 timestamps  |   cnt2 timestamps
 488  *          3          |         5
 489  *          4          |         6
 490  *          5          |         7 <---- max recorded
 491  *
 492  *      Flush every events below timestamp 4
 493  *
 494  *    ============ PASS n + 2 ==============
 495  *       CPU 0         |   CPU 1
 496  *                     |
 497  *    cnt1 timestamps  |   cnt2 timestamps
 498  *          6          |         8
 499  *          7          |         9
 500  *          -          |         10
 501  *
 502  *      Flush every events below timestamp 7
 503  *      etc...
 504  */
 505 static int process_finished_round(struct perf_tool *tool,
 506                                   union perf_event *event __maybe_unused,
 507                                   struct perf_session *session)
 508 {
 509         return ordered_events__flush(session, tool, OE_FLUSH__ROUND);
 510 }
 511
 512 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
 513                              struct perf_tool *tool, struct perf_sample *sample,
 514                              u64 file_offset)
 515 {
 516         struct ordered_events *oe = &s->ordered_events;
 517         u64 timestamp = sample->time;
 518         struct ordered_event *new;
 519
 520         if (!timestamp || timestamp == ~0ULL)
 521                 return -ETIME;
 522
 523         if (timestamp < oe->last_flush) {
 524                 WARN_ONCE(1, "Timestamp below last timeslice flush\n");
 525
 526                 pr_oe_time(timestamp,      "out of order event");
 527                 pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n",
 528                            oe->last_flush_type);
 529
 530                 /* We could get out of order messages after forced flush. */
 531                 if (oe->last_flush_type != OE_FLUSH__HALF)
 532                         return -EINVAL;
 533         }
 534
 535         new = ordered_events__new(oe, timestamp);
 536         if (!new) {
 537                 ordered_events__flush(s, tool, OE_FLUSH__HALF);
 538                 new = ordered_events__new(oe, timestamp);
 539         }
 540
 541         if (!new)
 542                 return -ENOMEM;
 543
 544         new->file_offset = file_offset;
 545         new->event = event;
 546         return 0;
 547 }
 548
 549 static void callchain__printf(struct perf_sample *sample)
 550 {
 551         unsigned int i;
 552
 553         printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
 554
 555         for (i = 0; i < sample->callchain->nr; i++)
 556                 printf("..... %2d: %016" PRIx64 "\n",
 557                        i, sample->callchain->ips[i]);
 558 }
 559
 560 static void branch_stack__printf(struct perf_sample *sample)
 561 {
 562         uint64_t i;
 563
 564         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 565
 566         for (i = 0; i < sample->branch_stack->nr; i++)
 567                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
 568                         i, sample->branch_stack->entries[i].from,
 569                         sample->branch_stack->entries[i].to);
 570 }
 571
 572 static void regs_dump__printf(u64 mask, u64 *regs)
 573 {
 574         unsigned rid, i = 0;
 575
 576         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 577                 u64 val = regs[i++];
 578
 579                 printf(".... %-5s 0x%" PRIx64 "\n",
 580                        perf_reg_name(rid), val);
 581         }
 582 }
 583
 584 static void regs_user__printf(struct perf_sample *sample)
 585 {
 586         struct regs_dump *user_regs = &sample->user_regs;
 587
 588         if (user_regs->regs) {
 589                 u64 mask = user_regs->mask;
 590                 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
 591                 regs_dump__printf(mask, user_regs->regs);
 592         }
 593 }
 594
 595 static void stack_user__printf(struct stack_dump *dump)
 596 {
 597         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 598                dump->size, dump->offset);
 599 }
 600
 601 static void perf_session__print_tstamp(struct perf_session *session,
 602                                        union perf_event *event,
 603                                        struct perf_sample *sample)
 604 {
 605         u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
 606
 607         if (event->header.type != PERF_RECORD_SAMPLE &&
 608             !perf_evlist__sample_id_all(session->evlist)) {
 609                 fputs("-1 -1 ", stdout);
 610                 return;
 611         }
 612
 613         if ((sample_type & PERF_SAMPLE_CPU))
 614                 printf("%u ", sample->cpu);
 615
 616         if (sample_type & PERF_SAMPLE_TIME)
 617                 printf("%" PRIu64 " ", sample->time);
 618 }
 619
 620 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
 621 {
 622         printf("... sample_read:\n");
 623
 624         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
 625                 printf("...... time enabled %016" PRIx64 "\n",
 626                        sample->read.time_enabled);
 627
 628         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
 629                 printf("...... time running %016" PRIx64 "\n",
 630                        sample->read.time_running);
 631
 632         if (read_format & PERF_FORMAT_GROUP) {
 633                 u64 i;
 634
 635                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
 636
 637                 for (i = 0; i < sample->read.group.nr; i++) {
 638                         struct sample_read_value *value;
 639
 640                         value = &sample->read.group.values[i];
 641                         printf("..... id %016" PRIx64
 642                                ", value %016" PRIx64 "\n",
 643                                value->id, value->value);
 644                 }
 645         } else
 646                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
 647                         sample->read.one.id, sample->read.one.value);
 648 }
 649
 650 static void dump_event(struct perf_session *session, union perf_event *event,
 651                        u64 file_offset, struct perf_sample *sample)
 652 {
 653         if (!dump_trace)
 654                 return;
 655
 656         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 657                file_offset, event->header.size, event->header.type);
 658
 659         trace_event(event);
 660
 661         if (sample)
 662                 perf_session__print_tstamp(session, event, sample);
 663
 664         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 665                event->header.size, perf_event__name(event->header.type));
 666 }
 667
 668 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 669                         struct perf_sample *sample)
 670 {
 671         u64 sample_type;
 672
 673         if (!dump_trace)
 674                 return;
 675
 676         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 677                event->header.misc, sample->pid, sample->tid, sample->ip,
 678                sample->period, sample->addr);
 679
 680         sample_type = evsel->attr.sample_type;
 681
 682         if (sample_type & PERF_SAMPLE_CALLCHAIN)
 683                 callchain__printf(sample);
 684
 685         if (sample_type & PERF_SAMPLE_BRANCH_STACK)
 686                 branch_stack__printf(sample);
 687
 688         if (sample_type & PERF_SAMPLE_REGS_USER)
 689                 regs_user__printf(sample);
 690
 691         if (sample_type & PERF_SAMPLE_STACK_USER)
 692                 stack_user__printf(&sample->user_stack);
 693
 694         if (sample_type & PERF_SAMPLE_WEIGHT)
 695                 printf("... weight: %" PRIu64 "\n", sample->weight);
 696
 697         if (sample_type & PERF_SAMPLE_DATA_SRC)
 698                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
 699
 700         if (sample_type & PERF_SAMPLE_TRANSACTION)
 701                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
 702
 703         if (sample_type & PERF_SAMPLE_READ)
 704                 sample_read__printf(sample, evsel->attr.read_format);
 705 }
 706
 707 static struct machine *
 708         perf_session__find_machine_for_cpumode(struct perf_session *session,
 709                                                union perf_event *event,
 710                                                struct perf_sample *sample)
 711 {
 712         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 713         struct machine *machine;
 714
 715         if (perf_guest &&
 716             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
 717              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
 718                 u32 pid;
 719
 720                 if (event->header.type == PERF_RECORD_MMAP
 721                     || event->header.type == PERF_RECORD_MMAP2)
 722                         pid = event->mmap.pid;
 723                 else
 724                         pid = sample->pid;
 725
 726                 machine = perf_session__find_machine(session, pid);
 727                 if (!machine)
 728                         machine = perf_session__findnew_machine(session,
 729                                                 DEFAULT_GUEST_KERNEL_ID);
 730                 return machine;
 731         }
 732
 733         return &session->machines.host;
 734 }
 735
 736 static int deliver_sample_value(struct perf_session *session,
 737                                 struct perf_tool *tool,
 738                                 union perf_event *event,
 739                                 struct perf_sample *sample,
 740                                 struct sample_read_value *v,
 741                                 struct machine *machine)
 742 {
 743         struct perf_sample_id *sid;
 744
 745         sid = perf_evlist__id2sid(session->evlist, v->id);
 746         if (sid) {
 747                 sample->id     = v->id;
 748                 sample->period = v->value - sid->period;
 749                 sid->period    = v->value;
 750         }
 751
 752         if (!sid || sid->evsel == NULL) {
 753                 ++session->stats.nr_unknown_id;
 754                 return 0;
 755         }
 756
 757         return tool->sample(tool, event, sample, sid->evsel, machine);
 758 }
 759
 760 static int deliver_sample_group(struct perf_session *session,
 761                                 struct perf_tool *tool,
 762                                 union  perf_event *event,
 763                                 struct perf_sample *sample,
 764                                 struct machine *machine)
 765 {
 766         int ret = -EINVAL;
 767         u64 i;
 768
 769         for (i = 0; i < sample->read.group.nr; i++) {
 770                 ret = deliver_sample_value(session, tool, event, sample,
 771                                            &sample->read.group.values[i],
 772                                            machine);
 773                 if (ret)
 774                         break;
 775         }
 776
 777         return ret;
 778 }
 779
 780 static int
 781 perf_session__deliver_sample(struct perf_session *session,
 782                              struct perf_tool *tool,
 783                              union  perf_event *event,
 784                              struct perf_sample *sample,
 785                              struct perf_evsel *evsel,
 786                              struct machine *machine)
 787 {
 788         /* We know evsel != NULL. */
 789         u64 sample_type = evsel->attr.sample_type;
 790         u64 read_format = evsel->attr.read_format;
 791
 792         /* Standard sample delievery. */
 793         if (!(sample_type & PERF_SAMPLE_READ))
 794                 return tool->sample(tool, event, sample, evsel, machine);
 795
 796         /* For PERF_SAMPLE_READ we have either single or group mode. */
 797         if (read_format & PERF_FORMAT_GROUP)
 798                 return deliver_sample_group(session, tool, event, sample,
 799                                             machine);
 800         else
 801                 return deliver_sample_value(session, tool, event, sample,
 802                                             &sample->read.one, machine);
 803 }
 804
 805 int perf_session__deliver_event(struct perf_session *session,
 806                                 union perf_event *event,
 807                                 struct perf_sample *sample,
 808                                 struct perf_tool *tool, u64 file_offset)
 809 {
 810         struct perf_evsel *evsel;
 811         struct machine *machine;
 812
 813         dump_event(session, event, file_offset, sample);
 814
 815         evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 816
 817         machine = perf_session__find_machine_for_cpumode(session, event,
 818                                                          sample);
 819
 820         switch (event->header.type) {
 821         case PERF_RECORD_SAMPLE:
 822                 dump_sample(evsel, event, sample);
 823                 if (evsel == NULL) {
 824                         ++session->stats.nr_unknown_id;
 825                         return 0;
 826                 }
 827                 if (machine == NULL) {
 828                         ++session->stats.nr_unprocessable_samples;
 829                         return 0;
 830                 }
 831                 return perf_session__deliver_sample(session, tool, event,
 832                                                     sample, evsel, machine);
 833         case PERF_RECORD_MMAP:
 834                 return tool->mmap(tool, event, sample, machine);
 835         case PERF_RECORD_MMAP2:
 836                 return tool->mmap2(tool, event, sample, machine);
 837         case PERF_RECORD_COMM:
 838                 return tool->comm(tool, event, sample, machine);
 839         case PERF_RECORD_FORK:
 840                 return tool->fork(tool, event, sample, machine);
 841         case PERF_RECORD_EXIT:
 842                 return tool->exit(tool, event, sample, machine);
 843         case PERF_RECORD_LOST:
 844                 if (tool->lost == perf_event__process_lost)
 845                         session->stats.total_lost += event->lost.lost;
 846                 return tool->lost(tool, event, sample, machine);
 847         case PERF_RECORD_READ:
 848                 return tool->read(tool, event, sample, evsel, machine);
 849         case PERF_RECORD_THROTTLE:
 850                 return tool->throttle(tool, event, sample, machine);
 851         case PERF_RECORD_UNTHROTTLE:
 852                 return tool->unthrottle(tool, event, sample, machine);
 853         default:
 854                 ++session->stats.nr_unknown_events;
 855                 return -1;
 856         }
 857 }
 858
 859 static s64 perf_session__process_user_event(struct perf_session *session,
 860                                             union perf_event *event,
 861                                             struct perf_tool *tool,
 862                                             u64 file_offset)
 863 {
 864         int fd = perf_data_file__fd(session->file);
 865         int err;
 866
 867         dump_event(session, event, file_offset, NULL);
 868
 869         /* These events are processed right away */
 870         switch (event->header.type) {
 871         case PERF_RECORD_HEADER_ATTR:
 872                 err = tool->attr(tool, event, &session->evlist);
 873                 if (err == 0) {
 874                         perf_session__set_id_hdr_size(session);
 875                         perf_session__set_comm_exec(session);
 876                 }
 877                 return err;
 878         case PERF_RECORD_HEADER_EVENT_TYPE:
 879                 /*
 880                  * Depreceated, but we need to handle it for sake
 881                  * of old data files create in pipe mode.
 882                  */
 883                 return 0;
 884         case PERF_RECORD_HEADER_TRACING_DATA:
 885                 /* setup for reading amidst mmap */
 886                 lseek(fd, file_offset, SEEK_SET);
 887                 return tool->tracing_data(tool, event, session);
 888         case PERF_RECORD_HEADER_BUILD_ID:
 889                 return tool->build_id(tool, event, session);
 890         case PERF_RECORD_FINISHED_ROUND:
 891                 return tool->finished_round(tool, event, session);
 892         default:
 893                 return -EINVAL;
 894         }
 895 }
 896
 897 static void event_swap(union perf_event *event, bool sample_id_all)
 898 {
 899         perf_event__swap_op swap;
 900
 901         swap = perf_event__swap_ops[event->header.type];
 902         if (swap)
 903                 swap(event, sample_id_all);
 904 }
 905
 906 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
 907                              void *buf, size_t buf_sz,
 908                              union perf_event **event_ptr,
 909                              struct perf_sample *sample)
 910 {
 911         union perf_event *event;
 912         size_t hdr_sz, rest;
 913         int fd;
 914
 915         if (session->one_mmap && !session->header.needs_swap) {
 916                 event = file_offset - session->one_mmap_offset +
 917                         session->one_mmap_addr;
 918                 goto out_parse_sample;
 919         }
 920
 921         if (perf_data_file__is_pipe(session->file))
 922                 return -1;
 923
 924         fd = perf_data_file__fd(session->file);
 925         hdr_sz = sizeof(struct perf_event_header);
 926
 927         if (buf_sz < hdr_sz)
 928                 return -1;
 929
 930         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
 931             readn(fd, &buf, hdr_sz) != (ssize_t)hdr_sz)
 932                 return -1;
 933
 934         event = (union perf_event *)buf;
 935
 936         if (session->header.needs_swap)
 937                 perf_event_header__bswap(&event->header);
 938
 939         if (event->header.size < hdr_sz)
 940                 return -1;
 941
 942         rest = event->header.size - hdr_sz;
 943
 944         if (readn(fd, &buf, rest) != (ssize_t)rest)
 945                 return -1;
 946
 947         if (session->header.needs_swap)
 948                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
 949
 950 out_parse_sample:
 951
 952         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
 953             perf_evlist__parse_sample(session->evlist, event, sample))
 954                 return -1;
 955
 956         *event_ptr = event;
 957
 958         return 0;
 959 }
 960
 961 static s64 perf_session__process_event(struct perf_session *session,
 962                                        union perf_event *event,
 963                                        struct perf_tool *tool,
 964                                        u64 file_offset)
 965 {
 966         struct perf_sample sample;
 967         int ret;
 968
 969         if (session->header.needs_swap)
 970                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
 971
 972         if (event->header.type >= PERF_RECORD_HEADER_MAX)
 973                 return -EINVAL;
 974
 975         events_stats__inc(&session->stats, event->header.type);
 976
 977         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
 978                 return perf_session__process_user_event(session, event, tool, file_offset);
 979
 980         /*
 981          * For all kernel events we get the sample data
 982          */
 983         ret = perf_evlist__parse_sample(session->evlist, event, &sample);
 984         if (ret)
 985                 return ret;
 986
 987         if (tool->ordered_events) {
 988                 ret = perf_session_queue_event(session, event, tool, &sample,
 989                                                file_offset);
 990                 if (ret != -ETIME)
 991                         return ret;
 992         }
 993
 994         return perf_session__deliver_event(session, event, &sample, tool,
 995                                            file_offset);
 996 }
 997
 998 void perf_event_header__bswap(struct perf_event_header *hdr)
 999 {
1000         hdr->type = bswap_32(hdr->type);
1001         hdr->misc = bswap_16(hdr->misc);
1002         hdr->size = bswap_16(hdr->size);
1003 }
1004
1005 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1006 {
1007         return machine__findnew_thread(&session->machines.host, -1, pid);
1008 }
1009
1010 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1011 {
1012         struct thread *thread;
1013
1014         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1015         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1016                 pr_err("problem inserting idle task.\n");
1017                 thread = NULL;
1018         }
1019
1020         return thread;
1021 }
1022
1023 static void perf_session__warn_about_errors(const struct perf_session *session,
1024                                             const struct perf_tool *tool)
1025 {
1026         if (tool->lost == perf_event__process_lost &&
1027             session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1028                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1029                             "Check IO/CPU overload!\n\n",
1030                             session->stats.nr_events[0],
1031                             session->stats.nr_events[PERF_RECORD_LOST]);
1032         }
1033
1034         if (session->stats.nr_unknown_events != 0) {
1035                 ui__warning("Found %u unknown events!\n\n"
1036                             "Is this an older tool processing a perf.data "
1037                             "file generated by a more recent tool?\n\n"
1038                             "If that is not the case, consider "
1039                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1040                             session->stats.nr_unknown_events);
1041         }
1042
1043         if (session->stats.nr_unknown_id != 0) {
1044                 ui__warning("%u samples with id not present in the header\n",
1045                             session->stats.nr_unknown_id);
1046         }
1047
1048         if (session->stats.nr_invalid_chains != 0) {
1049                 ui__warning("Found invalid callchains!\n\n"
1050                             "%u out of %u events were discarded for this reason.\n\n"
1051                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1052                             session->stats.nr_invalid_chains,
1053                             session->stats.nr_events[PERF_RECORD_SAMPLE]);
1054         }
1055
1056         if (session->stats.nr_unprocessable_samples != 0) {
1057                 ui__warning("%u unprocessable samples recorded.\n"
1058                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1059                             session->stats.nr_unprocessable_samples);
1060         }
1061 }
1062
1063 volatile int session_done;
1064
1065 static int __perf_session__process_pipe_events(struct perf_session *session,
1066                                                struct perf_tool *tool)
1067 {
1068         int fd = perf_data_file__fd(session->file);
1069         union perf_event *event;
1070         uint32_t size, cur_size = 0;
1071         void *buf = NULL;
1072         s64 skip = 0;
1073         u64 head;
1074         ssize_t err;
1075         void *p;
1076
1077         perf_tool__fill_defaults(tool);
1078
1079         head = 0;
1080         cur_size = sizeof(union perf_event);
1081
1082         buf = malloc(cur_size);
1083         if (!buf)
1084                 return -errno;
1085 more:
1086         event = buf;
1087         err = readn(fd, event, sizeof(struct perf_event_header));
1088         if (err <= 0) {
1089                 if (err == 0)
1090                         goto done;
1091
1092                 pr_err("failed to read event header\n");
1093                 goto out_err;
1094         }
1095
1096         if (session->header.needs_swap)
1097                 perf_event_header__bswap(&event->header);
1098
1099         size = event->header.size;
1100         if (size < sizeof(struct perf_event_header)) {
1101                 pr_err("bad event header size\n");
1102                 goto out_err;
1103         }
1104
1105         if (size > cur_size) {
1106                 void *new = realloc(buf, size);
1107                 if (!new) {
1108                         pr_err("failed to allocate memory to read event\n");
1109                         goto out_err;
1110                 }
1111                 buf = new;
1112                 cur_size = size;
1113                 event = buf;
1114         }
1115         p = event;
1116         p += sizeof(struct perf_event_header);
1117
1118         if (size - sizeof(struct perf_event_header)) {
1119                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1120                 if (err <= 0) {
1121                         if (err == 0) {
1122                                 pr_err("unexpected end of event stream\n");
1123                                 goto done;
1124                         }
1125
1126                         pr_err("failed to read event data\n");
1127                         goto out_err;
1128                 }
1129         }
1130
1131         if ((skip = perf_session__process_event(session, event, tool, head)) < 0) {
1132                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1133                        head, event->header.size, event->header.type);
1134                 err = -EINVAL;
1135                 goto out_err;
1136         }
1137
1138         head += size;
1139
1140         if (skip > 0)
1141                 head += skip;
1142
1143         if (!session_done())
1144                 goto more;
1145 done:
1146         /* do the final flush for ordered samples */
1147         err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1148 out_err:
1149         free(buf);
1150         perf_session__warn_about_errors(session, tool);
1151         ordered_events__free(&session->ordered_events);
1152         return err;
1153 }
1154
1155 static union perf_event *
1156 fetch_mmaped_event(struct perf_session *session,
1157                    u64 head, size_t mmap_size, char *buf)
1158 {
1159         union perf_event *event;
1160
1161         /*
1162          * Ensure we have enough space remaining to read
1163          * the size of the event in the headers.
1164          */
1165         if (head + sizeof(event->header) > mmap_size)
1166                 return NULL;
1167
1168         event = (union perf_event *)(buf + head);
1169
1170         if (session->header.needs_swap)
1171                 perf_event_header__bswap(&event->header);
1172
1173         if (head + event->header.size > mmap_size) {
1174                 /* We're not fetching the event so swap back again */
1175                 if (session->header.needs_swap)
1176                         perf_event_header__bswap(&event->header);
1177                 return NULL;
1178         }
1179
1180         return event;
1181 }
1182
1183 /*
1184  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1185  * slices. On 32bit we use 32MB.
1186  */
1187 #if BITS_PER_LONG == 64
1188 #define MMAP_SIZE ULLONG_MAX
1189 #define NUM_MMAPS 1
1190 #else
1191 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1192 #define NUM_MMAPS 128
1193 #endif
1194
1195 int __perf_session__process_events(struct perf_session *session,
1196                                    u64 data_offset, u64 data_size,
1197                                    u64 file_size, struct perf_tool *tool)
1198 {
1199         int fd = perf_data_file__fd(session->file);
1200         u64 head, page_offset, file_offset, file_pos, size;
1201         int err, mmap_prot, mmap_flags, map_idx = 0;
1202         size_t  mmap_size;
1203         char *buf, *mmaps[NUM_MMAPS];
1204         union perf_event *event;
1205         struct ui_progress prog;
1206         s64 skip;
1207
1208         perf_tool__fill_defaults(tool);
1209
1210         page_offset = page_size * (data_offset / page_size);
1211         file_offset = page_offset;
1212         head = data_offset - page_offset;
1213
1214         if (data_size && (data_offset + data_size < file_size))
1215                 file_size = data_offset + data_size;
1216
1217         ui_progress__init(&prog, file_size, "Processing events...");
1218
1219         mmap_size = MMAP_SIZE;
1220         if (mmap_size > file_size) {
1221                 mmap_size = file_size;
1222                 session->one_mmap = true;
1223         }
1224
1225         memset(mmaps, 0, sizeof(mmaps));
1226
1227         mmap_prot  = PROT_READ;
1228         mmap_flags = MAP_SHARED;
1229
1230         if (session->header.needs_swap) {
1231                 mmap_prot  |= PROT_WRITE;
1232                 mmap_flags = MAP_PRIVATE;
1233         }
1234 remap:
1235         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1236                    file_offset);
1237         if (buf == MAP_FAILED) {
1238                 pr_err("failed to mmap file\n");
1239                 err = -errno;
1240                 goto out_err;
1241         }
1242         mmaps[map_idx] = buf;
1243         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1244         file_pos = file_offset + head;
1245         if (session->one_mmap) {
1246                 session->one_mmap_addr = buf;
1247                 session->one_mmap_offset = file_offset;
1248         }
1249
1250 more:
1251         event = fetch_mmaped_event(session, head, mmap_size, buf);
1252         if (!event) {
1253                 if (mmaps[map_idx]) {
1254                         munmap(mmaps[map_idx], mmap_size);
1255                         mmaps[map_idx] = NULL;
1256                 }
1257
1258                 page_offset = page_size * (head / page_size);
1259                 file_offset += page_offset;
1260                 head -= page_offset;
1261                 goto remap;
1262         }
1263
1264         size = event->header.size;
1265
1266         if (size < sizeof(struct perf_event_header) ||
1267             (skip = perf_session__process_event(session, event, tool, file_pos))
1268                                                                         < 0) {
1269                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1270                        file_offset + head, event->header.size,
1271                        event->header.type);
1272                 err = -EINVAL;
1273                 goto out_err;
1274         }
1275
1276         if (skip)
1277                 size += skip;
1278
1279         head += size;
1280         file_pos += size;
1281
1282         ui_progress__update(&prog, size);
1283
1284         if (session_done())
1285                 goto out;
1286
1287         if (file_pos < file_size)
1288                 goto more;
1289
1290 out:
1291         /* do the final flush for ordered samples */
1292         err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1293 out_err:
1294         ui_progress__finish();
1295         perf_session__warn_about_errors(session, tool);
1296         ordered_events__free(&session->ordered_events);
1297         session->one_mmap = false;
1298         return err;
1299 }
1300
1301 int perf_session__process_events(struct perf_session *session,
1302                                  struct perf_tool *tool)
1303 {
1304         u64 size = perf_data_file__size(session->file);
1305         int err;
1306
1307         if (perf_session__register_idle_thread(session) == NULL)
1308                 return -ENOMEM;
1309
1310         if (!perf_data_file__is_pipe(session->file))
1311                 err = __perf_session__process_events(session,
1312                                                      session->header.data_offset,
1313                                                      session->header.data_size,
1314                                                      size, tool);
1315         else
1316                 err = __perf_session__process_pipe_events(session, tool);
1317
1318         return err;
1319 }
1320
1321 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1322 {
1323         struct perf_evsel *evsel;
1324
1325         evlist__for_each(session->evlist, evsel) {
1326                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1327                         return true;
1328         }
1329
1330         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1331         return false;
1332 }
1333
1334 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1335                                      const char *symbol_name, u64 addr)
1336 {
1337         char *bracket;
1338         enum map_type i;
1339         struct ref_reloc_sym *ref;
1340
1341         ref = zalloc(sizeof(struct ref_reloc_sym));
1342         if (ref == NULL)
1343                 return -ENOMEM;
1344
1345         ref->name = strdup(symbol_name);
1346         if (ref->name == NULL) {
1347                 free(ref);
1348                 return -ENOMEM;
1349         }
1350
1351         bracket = strchr(ref->name, ']');
1352         if (bracket)
1353                 *bracket = '\0';
1354
1355         ref->addr = addr;
1356
1357         for (i = 0; i < MAP__NR_TYPES; ++i) {
1358                 struct kmap *kmap = map__kmap(maps[i]);
1359                 kmap->ref_reloc_sym = ref;
1360         }
1361
1362         return 0;
1363 }
1364
1365 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1366 {
1367         return machines__fprintf_dsos(&session->machines, fp);
1368 }
1369
1370 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1371                                           bool (skip)(struct dso *dso, int parm), int parm)
1372 {
1373         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1374 }
1375
1376 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1377 {
1378         struct perf_evsel *pos;
1379         size_t ret = fprintf(fp, "Aggregated stats:\n");
1380
1381         ret += events_stats__fprintf(&session->stats, fp);
1382
1383         evlist__for_each(session->evlist, pos) {
1384                 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1385                 ret += events_stats__fprintf(&evsel__hists(pos)->stats, fp);
1386         }
1387
1388         return ret;
1389 }
1390
1391 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1392 {
1393         /*
1394          * FIXME: Here we have to actually print all the machines in this
1395          * session, not just the host...
1396          */
1397         return machine__fprintf(&session->machines.host, fp);
1398 }
1399
1400 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1401                                               unsigned int type)
1402 {
1403         struct perf_evsel *pos;
1404
1405         evlist__for_each(session->evlist, pos) {
1406                 if (pos->attr.type == type)
1407                         return pos;
1408         }
1409         return NULL;
1410 }
1411
1412 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1413                           struct addr_location *al,
1414                           unsigned int print_opts, unsigned int stack_depth)
1415 {
1416         struct callchain_cursor_node *node;
1417         int print_ip = print_opts & PRINT_IP_OPT_IP;
1418         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1419         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1420         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1421         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1422         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1423         char s = print_oneline ? ' ' : '\t';
1424
1425         if (symbol_conf.use_callchain && sample->callchain) {
1426                 struct addr_location node_al;
1427
1428                 if (machine__resolve_callchain(al->machine, evsel, al->thread,
1429                                                sample, NULL, NULL,
1430                                                PERF_MAX_STACK_DEPTH) != 0) {
1431                         if (verbose)
1432                                 error("Failed to resolve callchain. Skipping\n");
1433                         return;
1434                 }
1435                 callchain_cursor_commit(&callchain_cursor);
1436
1437                 if (print_symoffset)
1438                         node_al = *al;
1439
1440                 while (stack_depth) {
1441                         u64 addr = 0;
1442
1443                         node = callchain_cursor_current(&callchain_cursor);
1444                         if (!node)
1445                                 break;
1446
1447                         if (node->sym && node->sym->ignore)
1448                                 goto next;
1449
1450                         if (print_ip)
1451                                 printf("%c%16" PRIx64, s, node->ip);
1452
1453                         if (node->map)
1454                                 addr = node->map->map_ip(node->map, node->ip);
1455
1456                         if (print_sym) {
1457                                 printf(" ");
1458                                 if (print_symoffset) {
1459                                         node_al.addr = addr;
1460                                         node_al.map  = node->map;
1461                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1462                                 } else
1463                                         symbol__fprintf_symname(node->sym, stdout);
1464                         }
1465
1466                         if (print_dso) {
1467                                 printf(" (");
1468                                 map__fprintf_dsoname(node->map, stdout);
1469                                 printf(")");
1470                         }
1471
1472                         if (print_srcline)
1473                                 map__fprintf_srcline(node->map, addr, "\n  ",
1474                                                      stdout);
1475
1476                         if (!print_oneline)
1477                                 printf("\n");
1478
1479                         stack_depth--;
1480 next:
1481                         callchain_cursor_advance(&callchain_cursor);
1482                 }
1483
1484         } else {
1485                 if (al->sym && al->sym->ignore)
1486                         return;
1487
1488                 if (print_ip)
1489                         printf("%16" PRIx64, sample->ip);
1490
1491                 if (print_sym) {
1492                         printf(" ");
1493                         if (print_symoffset)
1494                                 symbol__fprintf_symname_offs(al->sym, al,
1495                                                              stdout);
1496                         else
1497                                 symbol__fprintf_symname(al->sym, stdout);
1498                 }
1499
1500                 if (print_dso) {
1501                         printf(" (");
1502                         map__fprintf_dsoname(al->map, stdout);
1503                         printf(")");
1504                 }
1505
1506                 if (print_srcline)
1507                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
1508         }
1509 }
1510
1511 int perf_session__cpu_bitmap(struct perf_session *session,
1512                              const char *cpu_list, unsigned long *cpu_bitmap)
1513 {
1514         int i, err = -1;
1515         struct cpu_map *map;
1516
1517         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1518                 struct perf_evsel *evsel;
1519
1520                 evsel = perf_session__find_first_evtype(session, i);
1521                 if (!evsel)
1522                         continue;
1523
1524                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1525                         pr_err("File does not contain CPU events. "
1526                                "Remove -c option to proceed.\n");
1527                         return -1;
1528                 }
1529         }
1530
1531         map = cpu_map__new(cpu_list);
1532         if (map == NULL) {
1533                 pr_err("Invalid cpu_list\n");
1534                 return -1;
1535         }
1536
1537         for (i = 0; i < map->nr; i++) {
1538                 int cpu = map->map[i];
1539
1540                 if (cpu >= MAX_NR_CPUS) {
1541                         pr_err("Requested CPU %d too large. "
1542                                "Consider raising MAX_NR_CPUS\n", cpu);
1543                         goto out_delete_map;
1544                 }
1545
1546                 set_bit(cpu, cpu_bitmap);
1547         }
1548
1549         err = 0;
1550
1551 out_delete_map:
1552         cpu_map__delete(map);
1553         return err;
1554 }
1555
1556 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1557                                 bool full)
1558 {
1559         struct stat st;
1560         int fd, ret;
1561
1562         if (session == NULL || fp == NULL)
1563                 return;
1564
1565         fd = perf_data_file__fd(session->file);
1566
1567         ret = fstat(fd, &st);
1568         if (ret == -1)
1569                 return;
1570
1571         fprintf(fp, "# ========\n");
1572         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1573         perf_header__fprintf_info(session, fp, full);
1574         fprintf(fp, "# ========\n#\n");
1575 }
1576
1577
1578 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1579                                              const struct perf_evsel_str_handler *assocs,
1580                                              size_t nr_assocs)
1581 {
1582         struct perf_evsel *evsel;
1583         size_t i;
1584         int err;
1585
1586         for (i = 0; i < nr_assocs; i++) {
1587                 /*
1588                  * Adding a handler for an event not in the session,
1589                  * just ignore it.
1590                  */
1591                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1592                 if (evsel == NULL)
1593                         continue;
1594
1595                 err = -EEXIST;
1596                 if (evsel->handler != NULL)
1597                         goto out;
1598                 evsel->handler = assocs[i].handler;
1599         }
1600
1601         err = 0;
1602 out:
1603         return err;
1604 }