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         if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
 817                 /*
 818                  * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
 819                  * because the tools right now may apply filters, discarding
 820                  * some of the samples. For consistency, in the future we
 821                  * should have something like nr_filtered_samples and remove
 822                  * the sample->period from total_sample_period, etc, KISS for
 823                  * now tho.
 824                  *
 825                  * Also testing against NULL allows us to handle files without
 826                  * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
 827                  * future probably it'll be a good idea to restrict event
 828                  * processing via perf_session to files with both set.
 829                  */
 830                 hists__inc_nr_events(&evsel->hists, event->header.type);
 831         }
 832
 833         machine = perf_session__find_machine_for_cpumode(session, event,
 834                                                          sample);
 835
 836         switch (event->header.type) {
 837         case PERF_RECORD_SAMPLE:
 838                 dump_sample(evsel, event, sample);
 839                 if (evsel == NULL) {
 840                         ++session->stats.nr_unknown_id;
 841                         return 0;
 842                 }
 843                 if (machine == NULL) {
 844                         ++session->stats.nr_unprocessable_samples;
 845                         return 0;
 846                 }
 847                 return perf_session__deliver_sample(session, tool, event,
 848                                                     sample, evsel, machine);
 849         case PERF_RECORD_MMAP:
 850                 return tool->mmap(tool, event, sample, machine);
 851         case PERF_RECORD_MMAP2:
 852                 return tool->mmap2(tool, event, sample, machine);
 853         case PERF_RECORD_COMM:
 854                 return tool->comm(tool, event, sample, machine);
 855         case PERF_RECORD_FORK:
 856                 return tool->fork(tool, event, sample, machine);
 857         case PERF_RECORD_EXIT:
 858                 return tool->exit(tool, event, sample, machine);
 859         case PERF_RECORD_LOST:
 860                 if (tool->lost == perf_event__process_lost)
 861                         session->stats.total_lost += event->lost.lost;
 862                 return tool->lost(tool, event, sample, machine);
 863         case PERF_RECORD_READ:
 864                 return tool->read(tool, event, sample, evsel, machine);
 865         case PERF_RECORD_THROTTLE:
 866                 return tool->throttle(tool, event, sample, machine);
 867         case PERF_RECORD_UNTHROTTLE:
 868                 return tool->unthrottle(tool, event, sample, machine);
 869         default:
 870                 ++session->stats.nr_unknown_events;
 871                 return -1;
 872         }
 873 }
 874
 875 static s64 perf_session__process_user_event(struct perf_session *session,
 876                                             union perf_event *event,
 877                                             struct perf_tool *tool,
 878                                             u64 file_offset)
 879 {
 880         int fd = perf_data_file__fd(session->file);
 881         int err;
 882
 883         dump_event(session, event, file_offset, NULL);
 884
 885         /* These events are processed right away */
 886         switch (event->header.type) {
 887         case PERF_RECORD_HEADER_ATTR:
 888                 err = tool->attr(tool, event, &session->evlist);
 889                 if (err == 0) {
 890                         perf_session__set_id_hdr_size(session);
 891                         perf_session__set_comm_exec(session);
 892                 }
 893                 return err;
 894         case PERF_RECORD_HEADER_EVENT_TYPE:
 895                 /*
 896                  * Depreceated, but we need to handle it for sake
 897                  * of old data files create in pipe mode.
 898                  */
 899                 return 0;
 900         case PERF_RECORD_HEADER_TRACING_DATA:
 901                 /* setup for reading amidst mmap */
 902                 lseek(fd, file_offset, SEEK_SET);
 903                 return tool->tracing_data(tool, event, session);
 904         case PERF_RECORD_HEADER_BUILD_ID:
 905                 return tool->build_id(tool, event, session);
 906         case PERF_RECORD_FINISHED_ROUND:
 907                 return tool->finished_round(tool, event, session);
 908         default:
 909                 return -EINVAL;
 910         }
 911 }
 912
 913 static void event_swap(union perf_event *event, bool sample_id_all)
 914 {
 915         perf_event__swap_op swap;
 916
 917         swap = perf_event__swap_ops[event->header.type];
 918         if (swap)
 919                 swap(event, sample_id_all);
 920 }
 921
 922 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
 923                              void *buf, size_t buf_sz,
 924                              union perf_event **event_ptr,
 925                              struct perf_sample *sample)
 926 {
 927         union perf_event *event;
 928         size_t hdr_sz, rest;
 929         int fd;
 930
 931         if (session->one_mmap && !session->header.needs_swap) {
 932                 event = file_offset - session->one_mmap_offset +
 933                         session->one_mmap_addr;
 934                 goto out_parse_sample;
 935         }
 936
 937         if (perf_data_file__is_pipe(session->file))
 938                 return -1;
 939
 940         fd = perf_data_file__fd(session->file);
 941         hdr_sz = sizeof(struct perf_event_header);
 942
 943         if (buf_sz < hdr_sz)
 944                 return -1;
 945
 946         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
 947             readn(fd, &buf, hdr_sz) != (ssize_t)hdr_sz)
 948                 return -1;
 949
 950         event = (union perf_event *)buf;
 951
 952         if (session->header.needs_swap)
 953                 perf_event_header__bswap(&event->header);
 954
 955         if (event->header.size < hdr_sz)
 956                 return -1;
 957
 958         rest = event->header.size - hdr_sz;
 959
 960         if (readn(fd, &buf, rest) != (ssize_t)rest)
 961                 return -1;
 962
 963         if (session->header.needs_swap)
 964                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
 965
 966 out_parse_sample:
 967
 968         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
 969             perf_evlist__parse_sample(session->evlist, event, sample))
 970                 return -1;
 971
 972         *event_ptr = event;
 973
 974         return 0;
 975 }
 976
 977 static s64 perf_session__process_event(struct perf_session *session,
 978                                        union perf_event *event,
 979                                        struct perf_tool *tool,
 980                                        u64 file_offset)
 981 {
 982         struct perf_sample sample;
 983         int ret;
 984
 985         if (session->header.needs_swap)
 986                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
 987
 988         if (event->header.type >= PERF_RECORD_HEADER_MAX)
 989                 return -EINVAL;
 990
 991         events_stats__inc(&session->stats, event->header.type);
 992
 993         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
 994                 return perf_session__process_user_event(session, event, tool, file_offset);
 995
 996         /*
 997          * For all kernel events we get the sample data
 998          */
 999         ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1000         if (ret)
1001                 return ret;
1002
1003         if (tool->ordered_events) {
1004                 ret = perf_session_queue_event(session, event, tool, &sample,
1005                                                file_offset);
1006                 if (ret != -ETIME)
1007                         return ret;
1008         }
1009
1010         return perf_session__deliver_event(session, event, &sample, tool,
1011                                            file_offset);
1012 }
1013
1014 void perf_event_header__bswap(struct perf_event_header *hdr)
1015 {
1016         hdr->type = bswap_32(hdr->type);
1017         hdr->misc = bswap_16(hdr->misc);
1018         hdr->size = bswap_16(hdr->size);
1019 }
1020
1021 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1022 {
1023         return machine__findnew_thread(&session->machines.host, -1, pid);
1024 }
1025
1026 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1027 {
1028         struct thread *thread;
1029
1030         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1031         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1032                 pr_err("problem inserting idle task.\n");
1033                 thread = NULL;
1034         }
1035
1036         return thread;
1037 }
1038
1039 static void perf_session__warn_about_errors(const struct perf_session *session,
1040                                             const struct perf_tool *tool)
1041 {
1042         if (tool->lost == perf_event__process_lost &&
1043             session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1044                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1045                             "Check IO/CPU overload!\n\n",
1046                             session->stats.nr_events[0],
1047                             session->stats.nr_events[PERF_RECORD_LOST]);
1048         }
1049
1050         if (session->stats.nr_unknown_events != 0) {
1051                 ui__warning("Found %u unknown events!\n\n"
1052                             "Is this an older tool processing a perf.data "
1053                             "file generated by a more recent tool?\n\n"
1054                             "If that is not the case, consider "
1055                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1056                             session->stats.nr_unknown_events);
1057         }
1058
1059         if (session->stats.nr_unknown_id != 0) {
1060                 ui__warning("%u samples with id not present in the header\n",
1061                             session->stats.nr_unknown_id);
1062         }
1063
1064         if (session->stats.nr_invalid_chains != 0) {
1065                 ui__warning("Found invalid callchains!\n\n"
1066                             "%u out of %u events were discarded for this reason.\n\n"
1067                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1068                             session->stats.nr_invalid_chains,
1069                             session->stats.nr_events[PERF_RECORD_SAMPLE]);
1070         }
1071
1072         if (session->stats.nr_unprocessable_samples != 0) {
1073                 ui__warning("%u unprocessable samples recorded.\n"
1074                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1075                             session->stats.nr_unprocessable_samples);
1076         }
1077 }
1078
1079 volatile int session_done;
1080
1081 static int __perf_session__process_pipe_events(struct perf_session *session,
1082                                                struct perf_tool *tool)
1083 {
1084         int fd = perf_data_file__fd(session->file);
1085         union perf_event *event;
1086         uint32_t size, cur_size = 0;
1087         void *buf = NULL;
1088         s64 skip = 0;
1089         u64 head;
1090         ssize_t err;
1091         void *p;
1092
1093         perf_tool__fill_defaults(tool);
1094
1095         head = 0;
1096         cur_size = sizeof(union perf_event);
1097
1098         buf = malloc(cur_size);
1099         if (!buf)
1100                 return -errno;
1101 more:
1102         event = buf;
1103         err = readn(fd, event, sizeof(struct perf_event_header));
1104         if (err <= 0) {
1105                 if (err == 0)
1106                         goto done;
1107
1108                 pr_err("failed to read event header\n");
1109                 goto out_err;
1110         }
1111
1112         if (session->header.needs_swap)
1113                 perf_event_header__bswap(&event->header);
1114
1115         size = event->header.size;
1116         if (size < sizeof(struct perf_event_header)) {
1117                 pr_err("bad event header size\n");
1118                 goto out_err;
1119         }
1120
1121         if (size > cur_size) {
1122                 void *new = realloc(buf, size);
1123                 if (!new) {
1124                         pr_err("failed to allocate memory to read event\n");
1125                         goto out_err;
1126                 }
1127                 buf = new;
1128                 cur_size = size;
1129                 event = buf;
1130         }
1131         p = event;
1132         p += sizeof(struct perf_event_header);
1133
1134         if (size - sizeof(struct perf_event_header)) {
1135                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1136                 if (err <= 0) {
1137                         if (err == 0) {
1138                                 pr_err("unexpected end of event stream\n");
1139                                 goto done;
1140                         }
1141
1142                         pr_err("failed to read event data\n");
1143                         goto out_err;
1144                 }
1145         }
1146
1147         if ((skip = perf_session__process_event(session, event, tool, head)) < 0) {
1148                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1149                        head, event->header.size, event->header.type);
1150                 err = -EINVAL;
1151                 goto out_err;
1152         }
1153
1154         head += size;
1155
1156         if (skip > 0)
1157                 head += skip;
1158
1159         if (!session_done())
1160                 goto more;
1161 done:
1162         /* do the final flush for ordered samples */
1163         err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1164 out_err:
1165         free(buf);
1166         perf_session__warn_about_errors(session, tool);
1167         ordered_events__free(&session->ordered_events);
1168         return err;
1169 }
1170
1171 static union perf_event *
1172 fetch_mmaped_event(struct perf_session *session,
1173                    u64 head, size_t mmap_size, char *buf)
1174 {
1175         union perf_event *event;
1176
1177         /*
1178          * Ensure we have enough space remaining to read
1179          * the size of the event in the headers.
1180          */
1181         if (head + sizeof(event->header) > mmap_size)
1182                 return NULL;
1183
1184         event = (union perf_event *)(buf + head);
1185
1186         if (session->header.needs_swap)
1187                 perf_event_header__bswap(&event->header);
1188
1189         if (head + event->header.size > mmap_size) {
1190                 /* We're not fetching the event so swap back again */
1191                 if (session->header.needs_swap)
1192                         perf_event_header__bswap(&event->header);
1193                 return NULL;
1194         }
1195
1196         return event;
1197 }
1198
1199 /*
1200  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1201  * slices. On 32bit we use 32MB.
1202  */
1203 #if BITS_PER_LONG == 64
1204 #define MMAP_SIZE ULLONG_MAX
1205 #define NUM_MMAPS 1
1206 #else
1207 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1208 #define NUM_MMAPS 128
1209 #endif
1210
1211 int __perf_session__process_events(struct perf_session *session,
1212                                    u64 data_offset, u64 data_size,
1213                                    u64 file_size, struct perf_tool *tool)
1214 {
1215         int fd = perf_data_file__fd(session->file);
1216         u64 head, page_offset, file_offset, file_pos, size;
1217         int err, mmap_prot, mmap_flags, map_idx = 0;
1218         size_t  mmap_size;
1219         char *buf, *mmaps[NUM_MMAPS];
1220         union perf_event *event;
1221         struct ui_progress prog;
1222         s64 skip;
1223
1224         perf_tool__fill_defaults(tool);
1225
1226         page_offset = page_size * (data_offset / page_size);
1227         file_offset = page_offset;
1228         head = data_offset - page_offset;
1229
1230         if (data_size && (data_offset + data_size < file_size))
1231                 file_size = data_offset + data_size;
1232
1233         ui_progress__init(&prog, file_size, "Processing events...");
1234
1235         mmap_size = MMAP_SIZE;
1236         if (mmap_size > file_size) {
1237                 mmap_size = file_size;
1238                 session->one_mmap = true;
1239         }
1240
1241         memset(mmaps, 0, sizeof(mmaps));
1242
1243         mmap_prot  = PROT_READ;
1244         mmap_flags = MAP_SHARED;
1245
1246         if (session->header.needs_swap) {
1247                 mmap_prot  |= PROT_WRITE;
1248                 mmap_flags = MAP_PRIVATE;
1249         }
1250 remap:
1251         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1252                    file_offset);
1253         if (buf == MAP_FAILED) {
1254                 pr_err("failed to mmap file\n");
1255                 err = -errno;
1256                 goto out_err;
1257         }
1258         mmaps[map_idx] = buf;
1259         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1260         file_pos = file_offset + head;
1261         if (session->one_mmap) {
1262                 session->one_mmap_addr = buf;
1263                 session->one_mmap_offset = file_offset;
1264         }
1265
1266 more:
1267         event = fetch_mmaped_event(session, head, mmap_size, buf);
1268         if (!event) {
1269                 if (mmaps[map_idx]) {
1270                         munmap(mmaps[map_idx], mmap_size);
1271                         mmaps[map_idx] = NULL;
1272                 }
1273
1274                 page_offset = page_size * (head / page_size);
1275                 file_offset += page_offset;
1276                 head -= page_offset;
1277                 goto remap;
1278         }
1279
1280         size = event->header.size;
1281
1282         if (size < sizeof(struct perf_event_header) ||
1283             (skip = perf_session__process_event(session, event, tool, file_pos))
1284                                                                         < 0) {
1285                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1286                        file_offset + head, event->header.size,
1287                        event->header.type);
1288                 err = -EINVAL;
1289                 goto out_err;
1290         }
1291
1292         if (skip)
1293                 size += skip;
1294
1295         head += size;
1296         file_pos += size;
1297
1298         ui_progress__update(&prog, size);
1299
1300         if (session_done())
1301                 goto out;
1302
1303         if (file_pos < file_size)
1304                 goto more;
1305
1306 out:
1307         /* do the final flush for ordered samples */
1308         err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1309 out_err:
1310         ui_progress__finish();
1311         perf_session__warn_about_errors(session, tool);
1312         ordered_events__free(&session->ordered_events);
1313         session->one_mmap = false;
1314         return err;
1315 }
1316
1317 int perf_session__process_events(struct perf_session *session,
1318                                  struct perf_tool *tool)
1319 {
1320         u64 size = perf_data_file__size(session->file);
1321         int err;
1322
1323         if (perf_session__register_idle_thread(session) == NULL)
1324                 return -ENOMEM;
1325
1326         if (!perf_data_file__is_pipe(session->file))
1327                 err = __perf_session__process_events(session,
1328                                                      session->header.data_offset,
1329                                                      session->header.data_size,
1330                                                      size, tool);
1331         else
1332                 err = __perf_session__process_pipe_events(session, tool);
1333
1334         return err;
1335 }
1336
1337 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1338 {
1339         struct perf_evsel *evsel;
1340
1341         evlist__for_each(session->evlist, evsel) {
1342                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1343                         return true;
1344         }
1345
1346         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1347         return false;
1348 }
1349
1350 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1351                                      const char *symbol_name, u64 addr)
1352 {
1353         char *bracket;
1354         enum map_type i;
1355         struct ref_reloc_sym *ref;
1356
1357         ref = zalloc(sizeof(struct ref_reloc_sym));
1358         if (ref == NULL)
1359                 return -ENOMEM;
1360
1361         ref->name = strdup(symbol_name);
1362         if (ref->name == NULL) {
1363                 free(ref);
1364                 return -ENOMEM;
1365         }
1366
1367         bracket = strchr(ref->name, ']');
1368         if (bracket)
1369                 *bracket = '\0';
1370
1371         ref->addr = addr;
1372
1373         for (i = 0; i < MAP__NR_TYPES; ++i) {
1374                 struct kmap *kmap = map__kmap(maps[i]);
1375                 kmap->ref_reloc_sym = ref;
1376         }
1377
1378         return 0;
1379 }
1380
1381 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1382 {
1383         return machines__fprintf_dsos(&session->machines, fp);
1384 }
1385
1386 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1387                                           bool (skip)(struct dso *dso, int parm), int parm)
1388 {
1389         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1390 }
1391
1392 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1393 {
1394         struct perf_evsel *pos;
1395         size_t ret = fprintf(fp, "Aggregated stats:\n");
1396
1397         ret += events_stats__fprintf(&session->stats, fp);
1398
1399         evlist__for_each(session->evlist, pos) {
1400                 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1401                 ret += events_stats__fprintf(&pos->hists.stats, fp);
1402         }
1403
1404         return ret;
1405 }
1406
1407 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1408 {
1409         /*
1410          * FIXME: Here we have to actually print all the machines in this
1411          * session, not just the host...
1412          */
1413         return machine__fprintf(&session->machines.host, fp);
1414 }
1415
1416 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1417                                               unsigned int type)
1418 {
1419         struct perf_evsel *pos;
1420
1421         evlist__for_each(session->evlist, pos) {
1422                 if (pos->attr.type == type)
1423                         return pos;
1424         }
1425         return NULL;
1426 }
1427
1428 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1429                           struct addr_location *al,
1430                           unsigned int print_opts, unsigned int stack_depth)
1431 {
1432         struct callchain_cursor_node *node;
1433         int print_ip = print_opts & PRINT_IP_OPT_IP;
1434         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1435         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1436         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1437         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1438         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1439         char s = print_oneline ? ' ' : '\t';
1440
1441         if (symbol_conf.use_callchain && sample->callchain) {
1442                 struct addr_location node_al;
1443
1444                 if (machine__resolve_callchain(al->machine, evsel, al->thread,
1445                                                sample, NULL, NULL,
1446                                                PERF_MAX_STACK_DEPTH) != 0) {
1447                         if (verbose)
1448                                 error("Failed to resolve callchain. Skipping\n");
1449                         return;
1450                 }
1451                 callchain_cursor_commit(&callchain_cursor);
1452
1453                 if (print_symoffset)
1454                         node_al = *al;
1455
1456                 while (stack_depth) {
1457                         u64 addr = 0;
1458
1459                         node = callchain_cursor_current(&callchain_cursor);
1460                         if (!node)
1461                                 break;
1462
1463                         if (node->sym && node->sym->ignore)
1464                                 goto next;
1465
1466                         if (print_ip)
1467                                 printf("%c%16" PRIx64, s, node->ip);
1468
1469                         if (node->map)
1470                                 addr = node->map->map_ip(node->map, node->ip);
1471
1472                         if (print_sym) {
1473                                 printf(" ");
1474                                 if (print_symoffset) {
1475                                         node_al.addr = addr;
1476                                         node_al.map  = node->map;
1477                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1478                                 } else
1479                                         symbol__fprintf_symname(node->sym, stdout);
1480                         }
1481
1482                         if (print_dso) {
1483                                 printf(" (");
1484                                 map__fprintf_dsoname(node->map, stdout);
1485                                 printf(")");
1486                         }
1487
1488                         if (print_srcline)
1489                                 map__fprintf_srcline(node->map, addr, "\n  ",
1490                                                      stdout);
1491
1492                         if (!print_oneline)
1493                                 printf("\n");
1494
1495                         stack_depth--;
1496 next:
1497                         callchain_cursor_advance(&callchain_cursor);
1498                 }
1499
1500         } else {
1501                 if (al->sym && al->sym->ignore)
1502                         return;
1503
1504                 if (print_ip)
1505                         printf("%16" PRIx64, sample->ip);
1506
1507                 if (print_sym) {
1508                         printf(" ");
1509                         if (print_symoffset)
1510                                 symbol__fprintf_symname_offs(al->sym, al,
1511                                                              stdout);
1512                         else
1513                                 symbol__fprintf_symname(al->sym, stdout);
1514                 }
1515
1516                 if (print_dso) {
1517                         printf(" (");
1518                         map__fprintf_dsoname(al->map, stdout);
1519                         printf(")");
1520                 }
1521
1522                 if (print_srcline)
1523                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
1524         }
1525 }
1526
1527 int perf_session__cpu_bitmap(struct perf_session *session,
1528                              const char *cpu_list, unsigned long *cpu_bitmap)
1529 {
1530         int i, err = -1;
1531         struct cpu_map *map;
1532
1533         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1534                 struct perf_evsel *evsel;
1535
1536                 evsel = perf_session__find_first_evtype(session, i);
1537                 if (!evsel)
1538                         continue;
1539
1540                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1541                         pr_err("File does not contain CPU events. "
1542                                "Remove -c option to proceed.\n");
1543                         return -1;
1544                 }
1545         }
1546
1547         map = cpu_map__new(cpu_list);
1548         if (map == NULL) {
1549                 pr_err("Invalid cpu_list\n");
1550                 return -1;
1551         }
1552
1553         for (i = 0; i < map->nr; i++) {
1554                 int cpu = map->map[i];
1555
1556                 if (cpu >= MAX_NR_CPUS) {
1557                         pr_err("Requested CPU %d too large. "
1558                                "Consider raising MAX_NR_CPUS\n", cpu);
1559                         goto out_delete_map;
1560                 }
1561
1562                 set_bit(cpu, cpu_bitmap);
1563         }
1564
1565         err = 0;
1566
1567 out_delete_map:
1568         cpu_map__delete(map);
1569         return err;
1570 }
1571
1572 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1573                                 bool full)
1574 {
1575         struct stat st;
1576         int fd, ret;
1577
1578         if (session == NULL || fp == NULL)
1579                 return;
1580
1581         fd = perf_data_file__fd(session->file);
1582
1583         ret = fstat(fd, &st);
1584         if (ret == -1)
1585                 return;
1586
1587         fprintf(fp, "# ========\n");
1588         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1589         perf_header__fprintf_info(session, fp, full);
1590         fprintf(fp, "# ========\n#\n");
1591 }
1592
1593
1594 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1595                                              const struct perf_evsel_str_handler *assocs,
1596                                              size_t nr_assocs)
1597 {
1598         struct perf_evsel *evsel;
1599         size_t i;
1600         int err;
1601
1602         for (i = 0; i < nr_assocs; i++) {
1603                 /*
1604                  * Adding a handler for an event not in the session,
1605                  * just ignore it.
1606                  */
1607                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1608                 if (evsel == NULL)
1609                         continue;
1610
1611                 err = -EEXIST;
1612                 if (evsel->handler != NULL)
1613                         goto out;
1614                 evsel->handler = assocs[i].handler;
1615         }
1616
1617         err = 0;
1618 out:
1619         return err;
1620 }