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 static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
 232                                  union perf_event *event __maybe_unused,
 233                                  struct perf_session *perf_session
 234                                  __maybe_unused)
 235 {
 236         dump_printf(": unhandled!\n");
 237         return 0;
 238 }
 239
 240 void perf_tool__fill_defaults(struct perf_tool *tool)
 241 {
 242         if (tool->sample == NULL)
 243                 tool->sample = process_event_sample_stub;
 244         if (tool->mmap == NULL)
 245                 tool->mmap = process_event_stub;
 246         if (tool->mmap2 == NULL)
 247                 tool->mmap2 = process_event_stub;
 248         if (tool->comm == NULL)
 249                 tool->comm = process_event_stub;
 250         if (tool->fork == NULL)
 251                 tool->fork = process_event_stub;
 252         if (tool->exit == NULL)
 253                 tool->exit = process_event_stub;
 254         if (tool->lost == NULL)
 255                 tool->lost = perf_event__process_lost;
 256         if (tool->read == NULL)
 257                 tool->read = process_event_sample_stub;
 258         if (tool->throttle == NULL)
 259                 tool->throttle = process_event_stub;
 260         if (tool->unthrottle == NULL)
 261                 tool->unthrottle = process_event_stub;
 262         if (tool->attr == NULL)
 263                 tool->attr = process_event_synth_attr_stub;
 264         if (tool->tracing_data == NULL)
 265                 tool->tracing_data = process_event_synth_tracing_data_stub;
 266         if (tool->build_id == NULL)
 267                 tool->build_id = process_finished_round_stub;
 268         if (tool->finished_round == NULL) {
 269                 if (tool->ordered_events)
 270                         tool->finished_round = process_finished_round;
 271                 else
 272                         tool->finished_round = process_finished_round_stub;
 273         }
 274         if (tool->id_index == NULL)
 275                 tool->id_index = process_id_index_stub;
 276 }
 277
 278 static void swap_sample_id_all(union perf_event *event, void *data)
 279 {
 280         void *end = (void *) event + event->header.size;
 281         int size = end - data;
 282
 283         BUG_ON(size % sizeof(u64));
 284         mem_bswap_64(data, size);
 285 }
 286
 287 static void perf_event__all64_swap(union perf_event *event,
 288                                    bool sample_id_all __maybe_unused)
 289 {
 290         struct perf_event_header *hdr = &event->header;
 291         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 292 }
 293
 294 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 295 {
 296         event->comm.pid = bswap_32(event->comm.pid);
 297         event->comm.tid = bswap_32(event->comm.tid);
 298
 299         if (sample_id_all) {
 300                 void *data = &event->comm.comm;
 301
 302                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 303                 swap_sample_id_all(event, data);
 304         }
 305 }
 306
 307 static void perf_event__mmap_swap(union perf_event *event,
 308                                   bool sample_id_all)
 309 {
 310         event->mmap.pid   = bswap_32(event->mmap.pid);
 311         event->mmap.tid   = bswap_32(event->mmap.tid);
 312         event->mmap.start = bswap_64(event->mmap.start);
 313         event->mmap.len   = bswap_64(event->mmap.len);
 314         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 315
 316         if (sample_id_all) {
 317                 void *data = &event->mmap.filename;
 318
 319                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 320                 swap_sample_id_all(event, data);
 321         }
 322 }
 323
 324 static void perf_event__mmap2_swap(union perf_event *event,
 325                                   bool sample_id_all)
 326 {
 327         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 328         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 329         event->mmap2.start = bswap_64(event->mmap2.start);
 330         event->mmap2.len   = bswap_64(event->mmap2.len);
 331         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 332         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 333         event->mmap2.min   = bswap_32(event->mmap2.min);
 334         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 335
 336         if (sample_id_all) {
 337                 void *data = &event->mmap2.filename;
 338
 339                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 340                 swap_sample_id_all(event, data);
 341         }
 342 }
 343 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 344 {
 345         event->fork.pid  = bswap_32(event->fork.pid);
 346         event->fork.tid  = bswap_32(event->fork.tid);
 347         event->fork.ppid = bswap_32(event->fork.ppid);
 348         event->fork.ptid = bswap_32(event->fork.ptid);
 349         event->fork.time = bswap_64(event->fork.time);
 350
 351         if (sample_id_all)
 352                 swap_sample_id_all(event, &event->fork + 1);
 353 }
 354
 355 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 356 {
 357         event->read.pid          = bswap_32(event->read.pid);
 358         event->read.tid          = bswap_32(event->read.tid);
 359         event->read.value        = bswap_64(event->read.value);
 360         event->read.time_enabled = bswap_64(event->read.time_enabled);
 361         event->read.time_running = bswap_64(event->read.time_running);
 362         event->read.id           = bswap_64(event->read.id);
 363
 364         if (sample_id_all)
 365                 swap_sample_id_all(event, &event->read + 1);
 366 }
 367
 368 static void perf_event__throttle_swap(union perf_event *event,
 369                                       bool sample_id_all)
 370 {
 371         event->throttle.time      = bswap_64(event->throttle.time);
 372         event->throttle.id        = bswap_64(event->throttle.id);
 373         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 374
 375         if (sample_id_all)
 376                 swap_sample_id_all(event, &event->throttle + 1);
 377 }
 378
 379 static u8 revbyte(u8 b)
 380 {
 381         int rev = (b >> 4) | ((b & 0xf) << 4);
 382         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 383         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 384         return (u8) rev;
 385 }
 386
 387 /*
 388  * XXX this is hack in attempt to carry flags bitfield
 389  * throught endian village. ABI says:
 390  *
 391  * Bit-fields are allocated from right to left (least to most significant)
 392  * on little-endian implementations and from left to right (most to least
 393  * significant) on big-endian implementations.
 394  *
 395  * The above seems to be byte specific, so we need to reverse each
 396  * byte of the bitfield. 'Internet' also says this might be implementation
 397  * specific and we probably need proper fix and carry perf_event_attr
 398  * bitfield flags in separate data file FEAT_ section. Thought this seems
 399  * to work for now.
 400  */
 401 static void swap_bitfield(u8 *p, unsigned len)
 402 {
 403         unsigned i;
 404
 405         for (i = 0; i < len; i++) {
 406                 *p = revbyte(*p);
 407                 p++;
 408         }
 409 }
 410
 411 /* exported for swapping attributes in file header */
 412 void perf_event__attr_swap(struct perf_event_attr *attr)
 413 {
 414         attr->type              = bswap_32(attr->type);
 415         attr->size              = bswap_32(attr->size);
 416         attr->config            = bswap_64(attr->config);
 417         attr->sample_period     = bswap_64(attr->sample_period);
 418         attr->sample_type       = bswap_64(attr->sample_type);
 419         attr->read_format       = bswap_64(attr->read_format);
 420         attr->wakeup_events     = bswap_32(attr->wakeup_events);
 421         attr->bp_type           = bswap_32(attr->bp_type);
 422         attr->bp_addr           = bswap_64(attr->bp_addr);
 423         attr->bp_len            = bswap_64(attr->bp_len);
 424         attr->branch_sample_type = bswap_64(attr->branch_sample_type);
 425         attr->sample_regs_user   = bswap_64(attr->sample_regs_user);
 426         attr->sample_stack_user  = bswap_32(attr->sample_stack_user);
 427
 428         swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
 429 }
 430
 431 static void perf_event__hdr_attr_swap(union perf_event *event,
 432                                       bool sample_id_all __maybe_unused)
 433 {
 434         size_t size;
 435
 436         perf_event__attr_swap(&event->attr.attr);
 437
 438         size = event->header.size;
 439         size -= (void *)&event->attr.id - (void *)event;
 440         mem_bswap_64(event->attr.id, size);
 441 }
 442
 443 static void perf_event__event_type_swap(union perf_event *event,
 444                                         bool sample_id_all __maybe_unused)
 445 {
 446         event->event_type.event_type.event_id =
 447                 bswap_64(event->event_type.event_type.event_id);
 448 }
 449
 450 static void perf_event__tracing_data_swap(union perf_event *event,
 451                                           bool sample_id_all __maybe_unused)
 452 {
 453         event->tracing_data.size = bswap_32(event->tracing_data.size);
 454 }
 455
 456 typedef void (*perf_event__swap_op)(union perf_event *event,
 457                                     bool sample_id_all);
 458
 459 static perf_event__swap_op perf_event__swap_ops[] = {
 460         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 461         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 462         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 463         [PERF_RECORD_FORK]                = perf_event__task_swap,
 464         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 465         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 466         [PERF_RECORD_READ]                = perf_event__read_swap,
 467         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 468         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 469         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 470         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 471         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 472         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 473         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 474         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
 475         [PERF_RECORD_HEADER_MAX]          = NULL,
 476 };
 477
 478 /*
 479  * When perf record finishes a pass on every buffers, it records this pseudo
 480  * event.
 481  * We record the max timestamp t found in the pass n.
 482  * Assuming these timestamps are monotonic across cpus, we know that if
 483  * a buffer still has events with timestamps below t, they will be all
 484  * available and then read in the pass n + 1.
 485  * Hence when we start to read the pass n + 2, we can safely flush every
 486  * events with timestamps below t.
 487  *
 488  *    ============ PASS n =================
 489  *       CPU 0         |   CPU 1
 490  *                     |
 491  *    cnt1 timestamps  |   cnt2 timestamps
 492  *          1          |         2
 493  *          2          |         3
 494  *          -          |         4  <--- max recorded
 495  *
 496  *    ============ PASS n + 1 ==============
 497  *       CPU 0         |   CPU 1
 498  *                     |
 499  *    cnt1 timestamps  |   cnt2 timestamps
 500  *          3          |         5
 501  *          4          |         6
 502  *          5          |         7 <---- max recorded
 503  *
 504  *      Flush every events below timestamp 4
 505  *
 506  *    ============ PASS n + 2 ==============
 507  *       CPU 0         |   CPU 1
 508  *                     |
 509  *    cnt1 timestamps  |   cnt2 timestamps
 510  *          6          |         8
 511  *          7          |         9
 512  *          -          |         10
 513  *
 514  *      Flush every events below timestamp 7
 515  *      etc...
 516  */
 517 static int process_finished_round(struct perf_tool *tool,
 518                                   union perf_event *event __maybe_unused,
 519                                   struct perf_session *session)
 520 {
 521         return ordered_events__flush(session, tool, OE_FLUSH__ROUND);
 522 }
 523
 524 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
 525                              struct perf_tool *tool, struct perf_sample *sample,
 526                              u64 file_offset)
 527 {
 528         struct ordered_events *oe = &s->ordered_events;
 529         u64 timestamp = sample->time;
 530         struct ordered_event *new;
 531
 532         if (!timestamp || timestamp == ~0ULL)
 533                 return -ETIME;
 534
 535         if (timestamp < oe->last_flush) {
 536                 WARN_ONCE(1, "Timestamp below last timeslice flush\n");
 537
 538                 pr_oe_time(timestamp,      "out of order event");
 539                 pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n",
 540                            oe->last_flush_type);
 541
 542                 /* We could get out of order messages after forced flush. */
 543                 if (oe->last_flush_type != OE_FLUSH__HALF)
 544                         return -EINVAL;
 545         }
 546
 547         new = ordered_events__new(oe, timestamp, event);
 548         if (!new) {
 549                 ordered_events__flush(s, tool, OE_FLUSH__HALF);
 550                 new = ordered_events__new(oe, timestamp, event);
 551         }
 552
 553         if (!new)
 554                 return -ENOMEM;
 555
 556         new->file_offset = file_offset;
 557         return 0;
 558 }
 559
 560 static void callchain__printf(struct perf_sample *sample)
 561 {
 562         unsigned int i;
 563
 564         printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
 565
 566         for (i = 0; i < sample->callchain->nr; i++)
 567                 printf("..... %2d: %016" PRIx64 "\n",
 568                        i, sample->callchain->ips[i]);
 569 }
 570
 571 static void branch_stack__printf(struct perf_sample *sample)
 572 {
 573         uint64_t i;
 574
 575         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 576
 577         for (i = 0; i < sample->branch_stack->nr; i++)
 578                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
 579                         i, sample->branch_stack->entries[i].from,
 580                         sample->branch_stack->entries[i].to);
 581 }
 582
 583 static void regs_dump__printf(u64 mask, u64 *regs)
 584 {
 585         unsigned rid, i = 0;
 586
 587         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 588                 u64 val = regs[i++];
 589
 590                 printf(".... %-5s 0x%" PRIx64 "\n",
 591                        perf_reg_name(rid), val);
 592         }
 593 }
 594
 595 static void regs_user__printf(struct perf_sample *sample)
 596 {
 597         struct regs_dump *user_regs = &sample->user_regs;
 598
 599         if (user_regs->regs) {
 600                 u64 mask = user_regs->mask;
 601                 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
 602                 regs_dump__printf(mask, user_regs->regs);
 603         }
 604 }
 605
 606 static void stack_user__printf(struct stack_dump *dump)
 607 {
 608         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 609                dump->size, dump->offset);
 610 }
 611
 612 static void perf_session__print_tstamp(struct perf_session *session,
 613                                        union perf_event *event,
 614                                        struct perf_sample *sample)
 615 {
 616         u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
 617
 618         if (event->header.type != PERF_RECORD_SAMPLE &&
 619             !perf_evlist__sample_id_all(session->evlist)) {
 620                 fputs("-1 -1 ", stdout);
 621                 return;
 622         }
 623
 624         if ((sample_type & PERF_SAMPLE_CPU))
 625                 printf("%u ", sample->cpu);
 626
 627         if (sample_type & PERF_SAMPLE_TIME)
 628                 printf("%" PRIu64 " ", sample->time);
 629 }
 630
 631 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
 632 {
 633         printf("... sample_read:\n");
 634
 635         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
 636                 printf("...... time enabled %016" PRIx64 "\n",
 637                        sample->read.time_enabled);
 638
 639         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
 640                 printf("...... time running %016" PRIx64 "\n",
 641                        sample->read.time_running);
 642
 643         if (read_format & PERF_FORMAT_GROUP) {
 644                 u64 i;
 645
 646                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
 647
 648                 for (i = 0; i < sample->read.group.nr; i++) {
 649                         struct sample_read_value *value;
 650
 651                         value = &sample->read.group.values[i];
 652                         printf("..... id %016" PRIx64
 653                                ", value %016" PRIx64 "\n",
 654                                value->id, value->value);
 655                 }
 656         } else
 657                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
 658                         sample->read.one.id, sample->read.one.value);
 659 }
 660
 661 static void dump_event(struct perf_session *session, union perf_event *event,
 662                        u64 file_offset, struct perf_sample *sample)
 663 {
 664         if (!dump_trace)
 665                 return;
 666
 667         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 668                file_offset, event->header.size, event->header.type);
 669
 670         trace_event(event);
 671
 672         if (sample)
 673                 perf_session__print_tstamp(session, event, sample);
 674
 675         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 676                event->header.size, perf_event__name(event->header.type));
 677 }
 678
 679 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 680                         struct perf_sample *sample)
 681 {
 682         u64 sample_type;
 683
 684         if (!dump_trace)
 685                 return;
 686
 687         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 688                event->header.misc, sample->pid, sample->tid, sample->ip,
 689                sample->period, sample->addr);
 690
 691         sample_type = evsel->attr.sample_type;
 692
 693         if (sample_type & PERF_SAMPLE_CALLCHAIN)
 694                 callchain__printf(sample);
 695
 696         if (sample_type & PERF_SAMPLE_BRANCH_STACK)
 697                 branch_stack__printf(sample);
 698
 699         if (sample_type & PERF_SAMPLE_REGS_USER)
 700                 regs_user__printf(sample);
 701
 702         if (sample_type & PERF_SAMPLE_STACK_USER)
 703                 stack_user__printf(&sample->user_stack);
 704
 705         if (sample_type & PERF_SAMPLE_WEIGHT)
 706                 printf("... weight: %" PRIu64 "\n", sample->weight);
 707
 708         if (sample_type & PERF_SAMPLE_DATA_SRC)
 709                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
 710
 711         if (sample_type & PERF_SAMPLE_TRANSACTION)
 712                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
 713
 714         if (sample_type & PERF_SAMPLE_READ)
 715                 sample_read__printf(sample, evsel->attr.read_format);
 716 }
 717
 718 static struct machine *
 719         perf_session__find_machine_for_cpumode(struct perf_session *session,
 720                                                union perf_event *event,
 721                                                struct perf_sample *sample)
 722 {
 723         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 724         struct machine *machine;
 725
 726         if (perf_guest &&
 727             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
 728              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
 729                 u32 pid;
 730
 731                 if (event->header.type == PERF_RECORD_MMAP
 732                     || event->header.type == PERF_RECORD_MMAP2)
 733                         pid = event->mmap.pid;
 734                 else
 735                         pid = sample->pid;
 736
 737                 machine = perf_session__find_machine(session, pid);
 738                 if (!machine)
 739                         machine = perf_session__findnew_machine(session,
 740                                                 DEFAULT_GUEST_KERNEL_ID);
 741                 return machine;
 742         }
 743
 744         return &session->machines.host;
 745 }
 746
 747 static int deliver_sample_value(struct perf_session *session,
 748                                 struct perf_tool *tool,
 749                                 union perf_event *event,
 750                                 struct perf_sample *sample,
 751                                 struct sample_read_value *v,
 752                                 struct machine *machine)
 753 {
 754         struct perf_sample_id *sid;
 755
 756         sid = perf_evlist__id2sid(session->evlist, v->id);
 757         if (sid) {
 758                 sample->id     = v->id;
 759                 sample->period = v->value - sid->period;
 760                 sid->period    = v->value;
 761         }
 762
 763         if (!sid || sid->evsel == NULL) {
 764                 ++session->stats.nr_unknown_id;
 765                 return 0;
 766         }
 767
 768         return tool->sample(tool, event, sample, sid->evsel, machine);
 769 }
 770
 771 static int deliver_sample_group(struct perf_session *session,
 772                                 struct perf_tool *tool,
 773                                 union  perf_event *event,
 774                                 struct perf_sample *sample,
 775                                 struct machine *machine)
 776 {
 777         int ret = -EINVAL;
 778         u64 i;
 779
 780         for (i = 0; i < sample->read.group.nr; i++) {
 781                 ret = deliver_sample_value(session, tool, event, sample,
 782                                            &sample->read.group.values[i],
 783                                            machine);
 784                 if (ret)
 785                         break;
 786         }
 787
 788         return ret;
 789 }
 790
 791 static int
 792 perf_session__deliver_sample(struct perf_session *session,
 793                              struct perf_tool *tool,
 794                              union  perf_event *event,
 795                              struct perf_sample *sample,
 796                              struct perf_evsel *evsel,
 797                              struct machine *machine)
 798 {
 799         /* We know evsel != NULL. */
 800         u64 sample_type = evsel->attr.sample_type;
 801         u64 read_format = evsel->attr.read_format;
 802
 803         /* Standard sample delievery. */
 804         if (!(sample_type & PERF_SAMPLE_READ))
 805                 return tool->sample(tool, event, sample, evsel, machine);
 806
 807         /* For PERF_SAMPLE_READ we have either single or group mode. */
 808         if (read_format & PERF_FORMAT_GROUP)
 809                 return deliver_sample_group(session, tool, event, sample,
 810                                             machine);
 811         else
 812                 return deliver_sample_value(session, tool, event, sample,
 813                                             &sample->read.one, machine);
 814 }
 815
 816 int perf_session__deliver_event(struct perf_session *session,
 817                                 union perf_event *event,
 818                                 struct perf_sample *sample,
 819                                 struct perf_tool *tool, u64 file_offset)
 820 {
 821         struct perf_evsel *evsel;
 822         struct machine *machine;
 823
 824         dump_event(session, event, file_offset, sample);
 825
 826         evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 827
 828         machine = perf_session__find_machine_for_cpumode(session, event,
 829                                                          sample);
 830
 831         switch (event->header.type) {
 832         case PERF_RECORD_SAMPLE:
 833                 dump_sample(evsel, event, sample);
 834                 if (evsel == NULL) {
 835                         ++session->stats.nr_unknown_id;
 836                         return 0;
 837                 }
 838                 if (machine == NULL) {
 839                         ++session->stats.nr_unprocessable_samples;
 840                         return 0;
 841                 }
 842                 return perf_session__deliver_sample(session, tool, event,
 843                                                     sample, evsel, machine);
 844         case PERF_RECORD_MMAP:
 845                 return tool->mmap(tool, event, sample, machine);
 846         case PERF_RECORD_MMAP2:
 847                 return tool->mmap2(tool, event, sample, machine);
 848         case PERF_RECORD_COMM:
 849                 return tool->comm(tool, event, sample, machine);
 850         case PERF_RECORD_FORK:
 851                 return tool->fork(tool, event, sample, machine);
 852         case PERF_RECORD_EXIT:
 853                 return tool->exit(tool, event, sample, machine);
 854         case PERF_RECORD_LOST:
 855                 if (tool->lost == perf_event__process_lost)
 856                         session->stats.total_lost += event->lost.lost;
 857                 return tool->lost(tool, event, sample, machine);
 858         case PERF_RECORD_READ:
 859                 return tool->read(tool, event, sample, evsel, machine);
 860         case PERF_RECORD_THROTTLE:
 861                 return tool->throttle(tool, event, sample, machine);
 862         case PERF_RECORD_UNTHROTTLE:
 863                 return tool->unthrottle(tool, event, sample, machine);
 864         default:
 865                 ++session->stats.nr_unknown_events;
 866                 return -1;
 867         }
 868 }
 869
 870 static s64 perf_session__process_user_event(struct perf_session *session,
 871                                             union perf_event *event,
 872                                             struct perf_tool *tool,
 873                                             u64 file_offset)
 874 {
 875         int fd = perf_data_file__fd(session->file);
 876         int err;
 877
 878         dump_event(session, event, file_offset, NULL);
 879
 880         /* These events are processed right away */
 881         switch (event->header.type) {
 882         case PERF_RECORD_HEADER_ATTR:
 883                 err = tool->attr(tool, event, &session->evlist);
 884                 if (err == 0) {
 885                         perf_session__set_id_hdr_size(session);
 886                         perf_session__set_comm_exec(session);
 887                 }
 888                 return err;
 889         case PERF_RECORD_HEADER_EVENT_TYPE:
 890                 /*
 891                  * Depreceated, but we need to handle it for sake
 892                  * of old data files create in pipe mode.
 893                  */
 894                 return 0;
 895         case PERF_RECORD_HEADER_TRACING_DATA:
 896                 /* setup for reading amidst mmap */
 897                 lseek(fd, file_offset, SEEK_SET);
 898                 return tool->tracing_data(tool, event, session);
 899         case PERF_RECORD_HEADER_BUILD_ID:
 900                 return tool->build_id(tool, event, session);
 901         case PERF_RECORD_FINISHED_ROUND:
 902                 return tool->finished_round(tool, event, session);
 903         case PERF_RECORD_ID_INDEX:
 904                 return tool->id_index(tool, event, session);
 905         default:
 906                 return -EINVAL;
 907         }
 908 }
 909
 910 static void event_swap(union perf_event *event, bool sample_id_all)
 911 {
 912         perf_event__swap_op swap;
 913
 914         swap = perf_event__swap_ops[event->header.type];
 915         if (swap)
 916                 swap(event, sample_id_all);
 917 }
 918
 919 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
 920                              void *buf, size_t buf_sz,
 921                              union perf_event **event_ptr,
 922                              struct perf_sample *sample)
 923 {
 924         union perf_event *event;
 925         size_t hdr_sz, rest;
 926         int fd;
 927
 928         if (session->one_mmap && !session->header.needs_swap) {
 929                 event = file_offset - session->one_mmap_offset +
 930                         session->one_mmap_addr;
 931                 goto out_parse_sample;
 932         }
 933
 934         if (perf_data_file__is_pipe(session->file))
 935                 return -1;
 936
 937         fd = perf_data_file__fd(session->file);
 938         hdr_sz = sizeof(struct perf_event_header);
 939
 940         if (buf_sz < hdr_sz)
 941                 return -1;
 942
 943         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
 944             readn(fd, &buf, hdr_sz) != (ssize_t)hdr_sz)
 945                 return -1;
 946
 947         event = (union perf_event *)buf;
 948
 949         if (session->header.needs_swap)
 950                 perf_event_header__bswap(&event->header);
 951
 952         if (event->header.size < hdr_sz)
 953                 return -1;
 954
 955         rest = event->header.size - hdr_sz;
 956
 957         if (readn(fd, &buf, rest) != (ssize_t)rest)
 958                 return -1;
 959
 960         if (session->header.needs_swap)
 961                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
 962
 963 out_parse_sample:
 964
 965         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
 966             perf_evlist__parse_sample(session->evlist, event, sample))
 967                 return -1;
 968
 969         *event_ptr = event;
 970
 971         return 0;
 972 }
 973
 974 static s64 perf_session__process_event(struct perf_session *session,
 975                                        union perf_event *event,
 976                                        struct perf_tool *tool,
 977                                        u64 file_offset)
 978 {
 979         struct perf_sample sample;
 980         int ret;
 981
 982         if (session->header.needs_swap)
 983                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
 984
 985         if (event->header.type >= PERF_RECORD_HEADER_MAX)
 986                 return -EINVAL;
 987
 988         events_stats__inc(&session->stats, event->header.type);
 989
 990         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
 991                 return perf_session__process_user_event(session, event, tool, file_offset);
 992
 993         /*
 994          * For all kernel events we get the sample data
 995          */
 996         ret = perf_evlist__parse_sample(session->evlist, event, &sample);
 997         if (ret)
 998                 return ret;
 999
1000         if (tool->ordered_events) {
1001                 ret = perf_session_queue_event(session, event, tool, &sample,
1002                                                file_offset);
1003                 if (ret != -ETIME)
1004                         return ret;
1005         }
1006
1007         return perf_session__deliver_event(session, event, &sample, tool,
1008                                            file_offset);
1009 }
1010
1011 void perf_event_header__bswap(struct perf_event_header *hdr)
1012 {
1013         hdr->type = bswap_32(hdr->type);
1014         hdr->misc = bswap_16(hdr->misc);
1015         hdr->size = bswap_16(hdr->size);
1016 }
1017
1018 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1019 {
1020         return machine__findnew_thread(&session->machines.host, -1, pid);
1021 }
1022
1023 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1024 {
1025         struct thread *thread;
1026
1027         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1028         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1029                 pr_err("problem inserting idle task.\n");
1030                 thread = NULL;
1031         }
1032
1033         return thread;
1034 }
1035
1036 static void perf_session__warn_about_errors(const struct perf_session *session,
1037                                             const struct perf_tool *tool)
1038 {
1039         if (tool->lost == perf_event__process_lost &&
1040             session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1041                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1042                             "Check IO/CPU overload!\n\n",
1043                             session->stats.nr_events[0],
1044                             session->stats.nr_events[PERF_RECORD_LOST]);
1045         }
1046
1047         if (session->stats.nr_unknown_events != 0) {
1048                 ui__warning("Found %u unknown events!\n\n"
1049                             "Is this an older tool processing a perf.data "
1050                             "file generated by a more recent tool?\n\n"
1051                             "If that is not the case, consider "
1052                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1053                             session->stats.nr_unknown_events);
1054         }
1055
1056         if (session->stats.nr_unknown_id != 0) {
1057                 ui__warning("%u samples with id not present in the header\n",
1058                             session->stats.nr_unknown_id);
1059         }
1060
1061         if (session->stats.nr_invalid_chains != 0) {
1062                 ui__warning("Found invalid callchains!\n\n"
1063                             "%u out of %u events were discarded for this reason.\n\n"
1064                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1065                             session->stats.nr_invalid_chains,
1066                             session->stats.nr_events[PERF_RECORD_SAMPLE]);
1067         }
1068
1069         if (session->stats.nr_unprocessable_samples != 0) {
1070                 ui__warning("%u unprocessable samples recorded.\n"
1071                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1072                             session->stats.nr_unprocessable_samples);
1073         }
1074 }
1075
1076 volatile int session_done;
1077
1078 static int __perf_session__process_pipe_events(struct perf_session *session,
1079                                                struct perf_tool *tool)
1080 {
1081         int fd = perf_data_file__fd(session->file);
1082         union perf_event *event;
1083         uint32_t size, cur_size = 0;
1084         void *buf = NULL;
1085         s64 skip = 0;
1086         u64 head;
1087         ssize_t err;
1088         void *p;
1089
1090         perf_tool__fill_defaults(tool);
1091
1092         head = 0;
1093         cur_size = sizeof(union perf_event);
1094
1095         buf = malloc(cur_size);
1096         if (!buf)
1097                 return -errno;
1098 more:
1099         event = buf;
1100         err = readn(fd, event, sizeof(struct perf_event_header));
1101         if (err <= 0) {
1102                 if (err == 0)
1103                         goto done;
1104
1105                 pr_err("failed to read event header\n");
1106                 goto out_err;
1107         }
1108
1109         if (session->header.needs_swap)
1110                 perf_event_header__bswap(&event->header);
1111
1112         size = event->header.size;
1113         if (size < sizeof(struct perf_event_header)) {
1114                 pr_err("bad event header size\n");
1115                 goto out_err;
1116         }
1117
1118         if (size > cur_size) {
1119                 void *new = realloc(buf, size);
1120                 if (!new) {
1121                         pr_err("failed to allocate memory to read event\n");
1122                         goto out_err;
1123                 }
1124                 buf = new;
1125                 cur_size = size;
1126                 event = buf;
1127         }
1128         p = event;
1129         p += sizeof(struct perf_event_header);
1130
1131         if (size - sizeof(struct perf_event_header)) {
1132                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1133                 if (err <= 0) {
1134                         if (err == 0) {
1135                                 pr_err("unexpected end of event stream\n");
1136                                 goto done;
1137                         }
1138
1139                         pr_err("failed to read event data\n");
1140                         goto out_err;
1141                 }
1142         }
1143
1144         if ((skip = perf_session__process_event(session, event, tool, head)) < 0) {
1145                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1146                        head, event->header.size, event->header.type);
1147                 err = -EINVAL;
1148                 goto out_err;
1149         }
1150
1151         head += size;
1152
1153         if (skip > 0)
1154                 head += skip;
1155
1156         if (!session_done())
1157                 goto more;
1158 done:
1159         /* do the final flush for ordered samples */
1160         err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1161 out_err:
1162         free(buf);
1163         perf_session__warn_about_errors(session, tool);
1164         ordered_events__free(&session->ordered_events);
1165         return err;
1166 }
1167
1168 static union perf_event *
1169 fetch_mmaped_event(struct perf_session *session,
1170                    u64 head, size_t mmap_size, char *buf)
1171 {
1172         union perf_event *event;
1173
1174         /*
1175          * Ensure we have enough space remaining to read
1176          * the size of the event in the headers.
1177          */
1178         if (head + sizeof(event->header) > mmap_size)
1179                 return NULL;
1180
1181         event = (union perf_event *)(buf + head);
1182
1183         if (session->header.needs_swap)
1184                 perf_event_header__bswap(&event->header);
1185
1186         if (head + event->header.size > mmap_size) {
1187                 /* We're not fetching the event so swap back again */
1188                 if (session->header.needs_swap)
1189                         perf_event_header__bswap(&event->header);
1190                 return NULL;
1191         }
1192
1193         return event;
1194 }
1195
1196 /*
1197  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1198  * slices. On 32bit we use 32MB.
1199  */
1200 #if BITS_PER_LONG == 64
1201 #define MMAP_SIZE ULLONG_MAX
1202 #define NUM_MMAPS 1
1203 #else
1204 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1205 #define NUM_MMAPS 128
1206 #endif
1207
1208 int __perf_session__process_events(struct perf_session *session,
1209                                    u64 data_offset, u64 data_size,
1210                                    u64 file_size, struct perf_tool *tool)
1211 {
1212         int fd = perf_data_file__fd(session->file);
1213         u64 head, page_offset, file_offset, file_pos, size;
1214         int err, mmap_prot, mmap_flags, map_idx = 0;
1215         size_t  mmap_size;
1216         char *buf, *mmaps[NUM_MMAPS];
1217         union perf_event *event;
1218         struct ui_progress prog;
1219         s64 skip;
1220
1221         perf_tool__fill_defaults(tool);
1222
1223         page_offset = page_size * (data_offset / page_size);
1224         file_offset = page_offset;
1225         head = data_offset - page_offset;
1226
1227         if (data_size && (data_offset + data_size < file_size))
1228                 file_size = data_offset + data_size;
1229
1230         ui_progress__init(&prog, file_size, "Processing events...");
1231
1232         mmap_size = MMAP_SIZE;
1233         if (mmap_size > file_size) {
1234                 mmap_size = file_size;
1235                 session->one_mmap = true;
1236         }
1237
1238         memset(mmaps, 0, sizeof(mmaps));
1239
1240         mmap_prot  = PROT_READ;
1241         mmap_flags = MAP_SHARED;
1242
1243         if (session->header.needs_swap) {
1244                 mmap_prot  |= PROT_WRITE;
1245                 mmap_flags = MAP_PRIVATE;
1246         }
1247 remap:
1248         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1249                    file_offset);
1250         if (buf == MAP_FAILED) {
1251                 pr_err("failed to mmap file\n");
1252                 err = -errno;
1253                 goto out_err;
1254         }
1255         mmaps[map_idx] = buf;
1256         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1257         file_pos = file_offset + head;
1258         if (session->one_mmap) {
1259                 session->one_mmap_addr = buf;
1260                 session->one_mmap_offset = file_offset;
1261         }
1262
1263 more:
1264         event = fetch_mmaped_event(session, head, mmap_size, buf);
1265         if (!event) {
1266                 if (mmaps[map_idx]) {
1267                         munmap(mmaps[map_idx], mmap_size);
1268                         mmaps[map_idx] = NULL;
1269                 }
1270
1271                 page_offset = page_size * (head / page_size);
1272                 file_offset += page_offset;
1273                 head -= page_offset;
1274                 goto remap;
1275         }
1276
1277         size = event->header.size;
1278
1279         if (size < sizeof(struct perf_event_header) ||
1280             (skip = perf_session__process_event(session, event, tool, file_pos))
1281                                                                         < 0) {
1282                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1283                        file_offset + head, event->header.size,
1284                        event->header.type);
1285                 err = -EINVAL;
1286                 goto out_err;
1287         }
1288
1289         if (skip)
1290                 size += skip;
1291
1292         head += size;
1293         file_pos += size;
1294
1295         ui_progress__update(&prog, size);
1296
1297         if (session_done())
1298                 goto out;
1299
1300         if (file_pos < file_size)
1301                 goto more;
1302
1303 out:
1304         /* do the final flush for ordered samples */
1305         err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1306 out_err:
1307         ui_progress__finish();
1308         perf_session__warn_about_errors(session, tool);
1309         ordered_events__free(&session->ordered_events);
1310         session->one_mmap = false;
1311         return err;
1312 }
1313
1314 int perf_session__process_events(struct perf_session *session,
1315                                  struct perf_tool *tool)
1316 {
1317         u64 size = perf_data_file__size(session->file);
1318         int err;
1319
1320         if (perf_session__register_idle_thread(session) == NULL)
1321                 return -ENOMEM;
1322
1323         if (!perf_data_file__is_pipe(session->file))
1324                 err = __perf_session__process_events(session,
1325                                                      session->header.data_offset,
1326                                                      session->header.data_size,
1327                                                      size, tool);
1328         else
1329                 err = __perf_session__process_pipe_events(session, tool);
1330
1331         return err;
1332 }
1333
1334 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1335 {
1336         struct perf_evsel *evsel;
1337
1338         evlist__for_each(session->evlist, evsel) {
1339                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1340                         return true;
1341         }
1342
1343         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1344         return false;
1345 }
1346
1347 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1348                                      const char *symbol_name, u64 addr)
1349 {
1350         char *bracket;
1351         enum map_type i;
1352         struct ref_reloc_sym *ref;
1353
1354         ref = zalloc(sizeof(struct ref_reloc_sym));
1355         if (ref == NULL)
1356                 return -ENOMEM;
1357
1358         ref->name = strdup(symbol_name);
1359         if (ref->name == NULL) {
1360                 free(ref);
1361                 return -ENOMEM;
1362         }
1363
1364         bracket = strchr(ref->name, ']');
1365         if (bracket)
1366                 *bracket = '\0';
1367
1368         ref->addr = addr;
1369
1370         for (i = 0; i < MAP__NR_TYPES; ++i) {
1371                 struct kmap *kmap = map__kmap(maps[i]);
1372                 kmap->ref_reloc_sym = ref;
1373         }
1374
1375         return 0;
1376 }
1377
1378 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1379 {
1380         return machines__fprintf_dsos(&session->machines, fp);
1381 }
1382
1383 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1384                                           bool (skip)(struct dso *dso, int parm), int parm)
1385 {
1386         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1387 }
1388
1389 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1390 {
1391         size_t ret = fprintf(fp, "Aggregated stats:\n");
1392
1393         ret += events_stats__fprintf(&session->stats, fp);
1394         return ret;
1395 }
1396
1397 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1398 {
1399         /*
1400          * FIXME: Here we have to actually print all the machines in this
1401          * session, not just the host...
1402          */
1403         return machine__fprintf(&session->machines.host, fp);
1404 }
1405
1406 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1407                                               unsigned int type)
1408 {
1409         struct perf_evsel *pos;
1410
1411         evlist__for_each(session->evlist, pos) {
1412                 if (pos->attr.type == type)
1413                         return pos;
1414         }
1415         return NULL;
1416 }
1417
1418 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1419                           struct addr_location *al,
1420                           unsigned int print_opts, unsigned int stack_depth)
1421 {
1422         struct callchain_cursor_node *node;
1423         int print_ip = print_opts & PRINT_IP_OPT_IP;
1424         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1425         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1426         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1427         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1428         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1429         char s = print_oneline ? ' ' : '\t';
1430
1431         if (symbol_conf.use_callchain && sample->callchain) {
1432                 struct addr_location node_al;
1433
1434                 if (thread__resolve_callchain(al->thread, evsel,
1435                                               sample, NULL, NULL,
1436                                               PERF_MAX_STACK_DEPTH) != 0) {
1437                         if (verbose)
1438                                 error("Failed to resolve callchain. Skipping\n");
1439                         return;
1440                 }
1441                 callchain_cursor_commit(&callchain_cursor);
1442
1443                 if (print_symoffset)
1444                         node_al = *al;
1445
1446                 while (stack_depth) {
1447                         u64 addr = 0;
1448
1449                         node = callchain_cursor_current(&callchain_cursor);
1450                         if (!node)
1451                                 break;
1452
1453                         if (node->sym && node->sym->ignore)
1454                                 goto next;
1455
1456                         if (print_ip)
1457                                 printf("%c%16" PRIx64, s, node->ip);
1458
1459                         if (node->map)
1460                                 addr = node->map->map_ip(node->map, node->ip);
1461
1462                         if (print_sym) {
1463                                 printf(" ");
1464                                 if (print_symoffset) {
1465                                         node_al.addr = addr;
1466                                         node_al.map  = node->map;
1467                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1468                                 } else
1469                                         symbol__fprintf_symname(node->sym, stdout);
1470                         }
1471
1472                         if (print_dso) {
1473                                 printf(" (");
1474                                 map__fprintf_dsoname(node->map, stdout);
1475                                 printf(")");
1476                         }
1477
1478                         if (print_srcline)
1479                                 map__fprintf_srcline(node->map, addr, "\n  ",
1480                                                      stdout);
1481
1482                         if (!print_oneline)
1483                                 printf("\n");
1484
1485                         stack_depth--;
1486 next:
1487                         callchain_cursor_advance(&callchain_cursor);
1488                 }
1489
1490         } else {
1491                 if (al->sym && al->sym->ignore)
1492                         return;
1493
1494                 if (print_ip)
1495                         printf("%16" PRIx64, sample->ip);
1496
1497                 if (print_sym) {
1498                         printf(" ");
1499                         if (print_symoffset)
1500                                 symbol__fprintf_symname_offs(al->sym, al,
1501                                                              stdout);
1502                         else
1503                                 symbol__fprintf_symname(al->sym, stdout);
1504                 }
1505
1506                 if (print_dso) {
1507                         printf(" (");
1508                         map__fprintf_dsoname(al->map, stdout);
1509                         printf(")");
1510                 }
1511
1512                 if (print_srcline)
1513                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
1514         }
1515 }
1516
1517 int perf_session__cpu_bitmap(struct perf_session *session,
1518                              const char *cpu_list, unsigned long *cpu_bitmap)
1519 {
1520         int i, err = -1;
1521         struct cpu_map *map;
1522
1523         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1524                 struct perf_evsel *evsel;
1525
1526                 evsel = perf_session__find_first_evtype(session, i);
1527                 if (!evsel)
1528                         continue;
1529
1530                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1531                         pr_err("File does not contain CPU events. "
1532                                "Remove -c option to proceed.\n");
1533                         return -1;
1534                 }
1535         }
1536
1537         map = cpu_map__new(cpu_list);
1538         if (map == NULL) {
1539                 pr_err("Invalid cpu_list\n");
1540                 return -1;
1541         }
1542
1543         for (i = 0; i < map->nr; i++) {
1544                 int cpu = map->map[i];
1545
1546                 if (cpu >= MAX_NR_CPUS) {
1547                         pr_err("Requested CPU %d too large. "
1548                                "Consider raising MAX_NR_CPUS\n", cpu);
1549                         goto out_delete_map;
1550                 }
1551
1552                 set_bit(cpu, cpu_bitmap);
1553         }
1554
1555         err = 0;
1556
1557 out_delete_map:
1558         cpu_map__delete(map);
1559         return err;
1560 }
1561
1562 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1563                                 bool full)
1564 {
1565         struct stat st;
1566         int fd, ret;
1567
1568         if (session == NULL || fp == NULL)
1569                 return;
1570
1571         fd = perf_data_file__fd(session->file);
1572
1573         ret = fstat(fd, &st);
1574         if (ret == -1)
1575                 return;
1576
1577         fprintf(fp, "# ========\n");
1578         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1579         perf_header__fprintf_info(session, fp, full);
1580         fprintf(fp, "# ========\n#\n");
1581 }
1582
1583
1584 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1585                                              const struct perf_evsel_str_handler *assocs,
1586                                              size_t nr_assocs)
1587 {
1588         struct perf_evsel *evsel;
1589         size_t i;
1590         int err;
1591
1592         for (i = 0; i < nr_assocs; i++) {
1593                 /*
1594                  * Adding a handler for an event not in the session,
1595                  * just ignore it.
1596                  */
1597                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1598                 if (evsel == NULL)
1599                         continue;
1600
1601                 err = -EEXIST;
1602                 if (evsel->handler != NULL)
1603                         goto out;
1604                 evsel->handler = assocs[i].handler;
1605         }
1606
1607         err = 0;
1608 out:
1609         return err;
1610 }
1611
1612 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
1613                                  union perf_event *event,
1614                                  struct perf_session *session)
1615 {
1616         struct perf_evlist *evlist = session->evlist;
1617         struct id_index_event *ie = &event->id_index;
1618         size_t i, nr, max_nr;
1619
1620         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
1621                  sizeof(struct id_index_entry);
1622         nr = ie->nr;
1623         if (nr > max_nr)
1624                 return -EINVAL;
1625
1626         if (dump_trace)
1627                 fprintf(stdout, " nr: %zu\n", nr);
1628
1629         for (i = 0; i < nr; i++) {
1630                 struct id_index_entry *e = &ie->entries[i];
1631                 struct perf_sample_id *sid;
1632
1633                 if (dump_trace) {
1634                         fprintf(stdout, " ... id: %"PRIu64, e->id);
1635                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
1636                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
1637                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
1638                 }
1639
1640                 sid = perf_evlist__id2sid(evlist, e->id);
1641                 if (!sid)
1642                         return -ENOENT;
1643                 sid->idx = e->idx;
1644                 sid->cpu = e->cpu;
1645                 sid->tid = e->tid;
1646         }
1647         return 0;
1648 }
1649
1650 int perf_event__synthesize_id_index(struct perf_tool *tool,
1651                                     perf_event__handler_t process,
1652                                     struct perf_evlist *evlist,
1653                                     struct machine *machine)
1654 {
1655         union perf_event *ev;
1656         struct perf_evsel *evsel;
1657         size_t nr = 0, i = 0, sz, max_nr, n;
1658         int err;
1659
1660         pr_debug2("Synthesizing id index\n");
1661
1662         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
1663                  sizeof(struct id_index_entry);
1664
1665         list_for_each_entry(evsel, &evlist->entries, node)
1666                 nr += evsel->ids;
1667
1668         n = nr > max_nr ? max_nr : nr;
1669         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
1670         ev = zalloc(sz);
1671         if (!ev)
1672                 return -ENOMEM;
1673
1674         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
1675         ev->id_index.header.size = sz;
1676         ev->id_index.nr = n;
1677
1678         list_for_each_entry(evsel, &evlist->entries, node) {
1679                 u32 j;
1680
1681                 for (j = 0; j < evsel->ids; j++) {
1682                         struct id_index_entry *e;
1683                         struct perf_sample_id *sid;
1684
1685                         if (i >= n) {
1686                                 err = process(tool, ev, NULL, machine);
1687                                 if (err)
1688                                         goto out_err;
1689                                 nr -= n;
1690                                 i = 0;
1691                         }
1692
1693                         e = &ev->id_index.entries[i++];
1694
1695                         e->id = evsel->id[j];
1696
1697                         sid = perf_evlist__id2sid(evlist, e->id);
1698                         if (!sid) {
1699                                 free(ev);
1700                                 return -ENOENT;
1701                         }
1702
1703                         e->idx = sid->idx;
1704                         e->cpu = sid->cpu;
1705                         e->tid = sid->tid;
1706                 }
1707         }
1708
1709         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
1710         ev->id_index.header.size = sz;
1711         ev->id_index.nr = nr;
1712
1713         err = process(tool, ev, NULL, machine);
1714 out_err:
1715         free(ev);
1716
1717         return err;
1718 }