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                 pr_oe_time(timestamp,      "out of order event\n");
 537                 pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n",
 538                            oe->last_flush_type);
 539
 540                 s->evlist->stats.nr_unordered_events++;
 541         }
 542
 543         new = ordered_events__new(oe, timestamp, event);
 544         if (!new) {
 545                 ordered_events__flush(s, tool, OE_FLUSH__HALF);
 546                 new = ordered_events__new(oe, timestamp, event);
 547         }
 548
 549         if (!new)
 550                 return -ENOMEM;
 551
 552         new->file_offset = file_offset;
 553         return 0;
 554 }
 555
 556 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 557 {
 558         struct ip_callchain *callchain = sample->callchain;
 559         struct branch_stack *lbr_stack = sample->branch_stack;
 560         u64 kernel_callchain_nr = callchain->nr;
 561         unsigned int i;
 562
 563         for (i = 0; i < kernel_callchain_nr; i++) {
 564                 if (callchain->ips[i] == PERF_CONTEXT_USER)
 565                         break;
 566         }
 567
 568         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 569                 u64 total_nr;
 570                 /*
 571                  * LBR callstack can only get user call chain,
 572                  * i is kernel call chain number,
 573                  * 1 is PERF_CONTEXT_USER.
 574                  *
 575                  * The user call chain is stored in LBR registers.
 576                  * LBR are pair registers. The caller is stored
 577                  * in "from" register, while the callee is stored
 578                  * in "to" register.
 579                  * For example, there is a call stack
 580                  * "A"->"B"->"C"->"D".
 581                  * The LBR registers will recorde like
 582                  * "C"->"D", "B"->"C", "A"->"B".
 583                  * So only the first "to" register and all "from"
 584                  * registers are needed to construct the whole stack.
 585                  */
 586                 total_nr = i + 1 + lbr_stack->nr + 1;
 587                 kernel_callchain_nr = i + 1;
 588
 589                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 590
 591                 for (i = 0; i < kernel_callchain_nr; i++)
 592                         printf("..... %2d: %016" PRIx64 "\n",
 593                                i, callchain->ips[i]);
 594
 595                 printf("..... %2d: %016" PRIx64 "\n",
 596                        (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 597                 for (i = 0; i < lbr_stack->nr; i++)
 598                         printf("..... %2d: %016" PRIx64 "\n",
 599                                (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 600         }
 601 }
 602
 603 static void callchain__printf(struct perf_evsel *evsel,
 604                               struct perf_sample *sample)
 605 {
 606         unsigned int i;
 607         struct ip_callchain *callchain = sample->callchain;
 608
 609         if (has_branch_callstack(evsel))
 610                 callchain__lbr_callstack_printf(sample);
 611
 612         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 613
 614         for (i = 0; i < callchain->nr; i++)
 615                 printf("..... %2d: %016" PRIx64 "\n",
 616                        i, callchain->ips[i]);
 617 }
 618
 619 static void branch_stack__printf(struct perf_sample *sample)
 620 {
 621         uint64_t i;
 622
 623         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 624
 625         for (i = 0; i < sample->branch_stack->nr; i++)
 626                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
 627                         i, sample->branch_stack->entries[i].from,
 628                         sample->branch_stack->entries[i].to);
 629 }
 630
 631 static void regs_dump__printf(u64 mask, u64 *regs)
 632 {
 633         unsigned rid, i = 0;
 634
 635         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 636                 u64 val = regs[i++];
 637
 638                 printf(".... %-5s 0x%" PRIx64 "\n",
 639                        perf_reg_name(rid), val);
 640         }
 641 }
 642
 643 static const char *regs_abi[] = {
 644         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
 645         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 646         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 647 };
 648
 649 static inline const char *regs_dump_abi(struct regs_dump *d)
 650 {
 651         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 652                 return "unknown";
 653
 654         return regs_abi[d->abi];
 655 }
 656
 657 static void regs__printf(const char *type, struct regs_dump *regs)
 658 {
 659         u64 mask = regs->mask;
 660
 661         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 662                type,
 663                mask,
 664                regs_dump_abi(regs));
 665
 666         regs_dump__printf(mask, regs->regs);
 667 }
 668
 669 static void regs_user__printf(struct perf_sample *sample)
 670 {
 671         struct regs_dump *user_regs = &sample->user_regs;
 672
 673         if (user_regs->regs)
 674                 regs__printf("user", user_regs);
 675 }
 676
 677 static void regs_intr__printf(struct perf_sample *sample)
 678 {
 679         struct regs_dump *intr_regs = &sample->intr_regs;
 680
 681         if (intr_regs->regs)
 682                 regs__printf("intr", intr_regs);
 683 }
 684
 685 static void stack_user__printf(struct stack_dump *dump)
 686 {
 687         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 688                dump->size, dump->offset);
 689 }
 690
 691 static void perf_session__print_tstamp(struct perf_session *session,
 692                                        union perf_event *event,
 693                                        struct perf_sample *sample)
 694 {
 695         u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
 696
 697         if (event->header.type != PERF_RECORD_SAMPLE &&
 698             !perf_evlist__sample_id_all(session->evlist)) {
 699                 fputs("-1 -1 ", stdout);
 700                 return;
 701         }
 702
 703         if ((sample_type & PERF_SAMPLE_CPU))
 704                 printf("%u ", sample->cpu);
 705
 706         if (sample_type & PERF_SAMPLE_TIME)
 707                 printf("%" PRIu64 " ", sample->time);
 708 }
 709
 710 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
 711 {
 712         printf("... sample_read:\n");
 713
 714         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
 715                 printf("...... time enabled %016" PRIx64 "\n",
 716                        sample->read.time_enabled);
 717
 718         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
 719                 printf("...... time running %016" PRIx64 "\n",
 720                        sample->read.time_running);
 721
 722         if (read_format & PERF_FORMAT_GROUP) {
 723                 u64 i;
 724
 725                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
 726
 727                 for (i = 0; i < sample->read.group.nr; i++) {
 728                         struct sample_read_value *value;
 729
 730                         value = &sample->read.group.values[i];
 731                         printf("..... id %016" PRIx64
 732                                ", value %016" PRIx64 "\n",
 733                                value->id, value->value);
 734                 }
 735         } else
 736                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
 737                         sample->read.one.id, sample->read.one.value);
 738 }
 739
 740 static void dump_event(struct perf_session *session, union perf_event *event,
 741                        u64 file_offset, struct perf_sample *sample)
 742 {
 743         if (!dump_trace)
 744                 return;
 745
 746         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 747                file_offset, event->header.size, event->header.type);
 748
 749         trace_event(event);
 750
 751         if (sample)
 752                 perf_session__print_tstamp(session, event, sample);
 753
 754         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 755                event->header.size, perf_event__name(event->header.type));
 756 }
 757
 758 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
 759                         struct perf_sample *sample)
 760 {
 761         u64 sample_type;
 762
 763         if (!dump_trace)
 764                 return;
 765
 766         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 767                event->header.misc, sample->pid, sample->tid, sample->ip,
 768                sample->period, sample->addr);
 769
 770         sample_type = evsel->attr.sample_type;
 771
 772         if (sample_type & PERF_SAMPLE_CALLCHAIN)
 773                 callchain__printf(evsel, sample);
 774
 775         if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
 776                 branch_stack__printf(sample);
 777
 778         if (sample_type & PERF_SAMPLE_REGS_USER)
 779                 regs_user__printf(sample);
 780
 781         if (sample_type & PERF_SAMPLE_REGS_INTR)
 782                 regs_intr__printf(sample);
 783
 784         if (sample_type & PERF_SAMPLE_STACK_USER)
 785                 stack_user__printf(&sample->user_stack);
 786
 787         if (sample_type & PERF_SAMPLE_WEIGHT)
 788                 printf("... weight: %" PRIu64 "\n", sample->weight);
 789
 790         if (sample_type & PERF_SAMPLE_DATA_SRC)
 791                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
 792
 793         if (sample_type & PERF_SAMPLE_TRANSACTION)
 794                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
 795
 796         if (sample_type & PERF_SAMPLE_READ)
 797                 sample_read__printf(sample, evsel->attr.read_format);
 798 }
 799
 800 static struct machine *machines__find_for_cpumode(struct machines *machines,
 801                                                union perf_event *event,
 802                                                struct perf_sample *sample)
 803 {
 804         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 805         struct machine *machine;
 806
 807         if (perf_guest &&
 808             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
 809              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
 810                 u32 pid;
 811
 812                 if (event->header.type == PERF_RECORD_MMAP
 813                     || event->header.type == PERF_RECORD_MMAP2)
 814                         pid = event->mmap.pid;
 815                 else
 816                         pid = sample->pid;
 817
 818                 machine = machines__find(machines, pid);
 819                 if (!machine)
 820                         machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID);
 821                 return machine;
 822         }
 823
 824         return &machines->host;
 825 }
 826
 827 static int deliver_sample_value(struct perf_session *session,
 828                                 struct perf_tool *tool,
 829                                 union perf_event *event,
 830                                 struct perf_sample *sample,
 831                                 struct sample_read_value *v,
 832                                 struct machine *machine)
 833 {
 834         struct perf_sample_id *sid;
 835
 836         sid = perf_evlist__id2sid(session->evlist, v->id);
 837         if (sid) {
 838                 sample->id     = v->id;
 839                 sample->period = v->value - sid->period;
 840                 sid->period    = v->value;
 841         }
 842
 843         if (!sid || sid->evsel == NULL) {
 844                 ++session->evlist->stats.nr_unknown_id;
 845                 return 0;
 846         }
 847
 848         return tool->sample(tool, event, sample, sid->evsel, machine);
 849 }
 850
 851 static int deliver_sample_group(struct perf_session *session,
 852                                 struct perf_tool *tool,
 853                                 union  perf_event *event,
 854                                 struct perf_sample *sample,
 855                                 struct machine *machine)
 856 {
 857         int ret = -EINVAL;
 858         u64 i;
 859
 860         for (i = 0; i < sample->read.group.nr; i++) {
 861                 ret = deliver_sample_value(session, tool, event, sample,
 862                                            &sample->read.group.values[i],
 863                                            machine);
 864                 if (ret)
 865                         break;
 866         }
 867
 868         return ret;
 869 }
 870
 871 static int
 872 perf_session__deliver_sample(struct perf_session *session,
 873                              struct perf_tool *tool,
 874                              union  perf_event *event,
 875                              struct perf_sample *sample,
 876                              struct perf_evsel *evsel,
 877                              struct machine *machine)
 878 {
 879         /* We know evsel != NULL. */
 880         u64 sample_type = evsel->attr.sample_type;
 881         u64 read_format = evsel->attr.read_format;
 882
 883         /* Standard sample delievery. */
 884         if (!(sample_type & PERF_SAMPLE_READ))
 885                 return tool->sample(tool, event, sample, evsel, machine);
 886
 887         /* For PERF_SAMPLE_READ we have either single or group mode. */
 888         if (read_format & PERF_FORMAT_GROUP)
 889                 return deliver_sample_group(session, tool, event, sample,
 890                                             machine);
 891         else
 892                 return deliver_sample_value(session, tool, event, sample,
 893                                             &sample->read.one, machine);
 894 }
 895
 896 int perf_session__deliver_event(struct perf_session *session,
 897                                 union perf_event *event,
 898                                 struct perf_sample *sample,
 899                                 struct perf_tool *tool, u64 file_offset)
 900 {
 901         struct perf_evsel *evsel;
 902         struct machine *machine;
 903
 904         dump_event(session, event, file_offset, sample);
 905
 906         evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 907
 908         machine = machines__find_for_cpumode(&session->machines, event, sample);
 909
 910         switch (event->header.type) {
 911         case PERF_RECORD_SAMPLE:
 912                 dump_sample(evsel, event, sample);
 913                 if (evsel == NULL) {
 914                         ++session->evlist->stats.nr_unknown_id;
 915                         return 0;
 916                 }
 917                 if (machine == NULL) {
 918                         ++session->evlist->stats.nr_unprocessable_samples;
 919                         return 0;
 920                 }
 921                 return perf_session__deliver_sample(session, tool, event,
 922                                                     sample, evsel, machine);
 923         case PERF_RECORD_MMAP:
 924                 return tool->mmap(tool, event, sample, machine);
 925         case PERF_RECORD_MMAP2:
 926                 return tool->mmap2(tool, event, sample, machine);
 927         case PERF_RECORD_COMM:
 928                 return tool->comm(tool, event, sample, machine);
 929         case PERF_RECORD_FORK:
 930                 return tool->fork(tool, event, sample, machine);
 931         case PERF_RECORD_EXIT:
 932                 return tool->exit(tool, event, sample, machine);
 933         case PERF_RECORD_LOST:
 934                 if (tool->lost == perf_event__process_lost)
 935                         session->evlist->stats.total_lost += event->lost.lost;
 936                 return tool->lost(tool, event, sample, machine);
 937         case PERF_RECORD_READ:
 938                 return tool->read(tool, event, sample, evsel, machine);
 939         case PERF_RECORD_THROTTLE:
 940                 return tool->throttle(tool, event, sample, machine);
 941         case PERF_RECORD_UNTHROTTLE:
 942                 return tool->unthrottle(tool, event, sample, machine);
 943         default:
 944                 ++session->evlist->stats.nr_unknown_events;
 945                 return -1;
 946         }
 947 }
 948
 949 static s64 perf_session__process_user_event(struct perf_session *session,
 950                                             union perf_event *event,
 951                                             struct perf_tool *tool,
 952                                             u64 file_offset)
 953 {
 954         int fd = perf_data_file__fd(session->file);
 955         int err;
 956
 957         dump_event(session, event, file_offset, NULL);
 958
 959         /* These events are processed right away */
 960         switch (event->header.type) {
 961         case PERF_RECORD_HEADER_ATTR:
 962                 err = tool->attr(tool, event, &session->evlist);
 963                 if (err == 0) {
 964                         perf_session__set_id_hdr_size(session);
 965                         perf_session__set_comm_exec(session);
 966                 }
 967                 return err;
 968         case PERF_RECORD_HEADER_EVENT_TYPE:
 969                 /*
 970                  * Depreceated, but we need to handle it for sake
 971                  * of old data files create in pipe mode.
 972                  */
 973                 return 0;
 974         case PERF_RECORD_HEADER_TRACING_DATA:
 975                 /* setup for reading amidst mmap */
 976                 lseek(fd, file_offset, SEEK_SET);
 977                 return tool->tracing_data(tool, event, session);
 978         case PERF_RECORD_HEADER_BUILD_ID:
 979                 return tool->build_id(tool, event, session);
 980         case PERF_RECORD_FINISHED_ROUND:
 981                 return tool->finished_round(tool, event, session);
 982         case PERF_RECORD_ID_INDEX:
 983                 return tool->id_index(tool, event, session);
 984         default:
 985                 return -EINVAL;
 986         }
 987 }
 988
 989 int perf_session__deliver_synth_event(struct perf_session *session,
 990                                       union perf_event *event,
 991                                       struct perf_sample *sample,
 992                                       struct perf_tool *tool)
 993 {
 994         events_stats__inc(&session->evlist->stats, event->header.type);
 995
 996         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
 997                 return perf_session__process_user_event(session, event, tool, 0);
 998
 999         return perf_session__deliver_event(session, event, sample, tool, 0);
1000 }
1001
1002 static void event_swap(union perf_event *event, bool sample_id_all)
1003 {
1004         perf_event__swap_op swap;
1005
1006         swap = perf_event__swap_ops[event->header.type];
1007         if (swap)
1008                 swap(event, sample_id_all);
1009 }
1010
1011 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1012                              void *buf, size_t buf_sz,
1013                              union perf_event **event_ptr,
1014                              struct perf_sample *sample)
1015 {
1016         union perf_event *event;
1017         size_t hdr_sz, rest;
1018         int fd;
1019
1020         if (session->one_mmap && !session->header.needs_swap) {
1021                 event = file_offset - session->one_mmap_offset +
1022                         session->one_mmap_addr;
1023                 goto out_parse_sample;
1024         }
1025
1026         if (perf_data_file__is_pipe(session->file))
1027                 return -1;
1028
1029         fd = perf_data_file__fd(session->file);
1030         hdr_sz = sizeof(struct perf_event_header);
1031
1032         if (buf_sz < hdr_sz)
1033                 return -1;
1034
1035         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1036             readn(fd, &buf, hdr_sz) != (ssize_t)hdr_sz)
1037                 return -1;
1038
1039         event = (union perf_event *)buf;
1040
1041         if (session->header.needs_swap)
1042                 perf_event_header__bswap(&event->header);
1043
1044         if (event->header.size < hdr_sz)
1045                 return -1;
1046
1047         rest = event->header.size - hdr_sz;
1048
1049         if (readn(fd, &buf, rest) != (ssize_t)rest)
1050                 return -1;
1051
1052         if (session->header.needs_swap)
1053                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1054
1055 out_parse_sample:
1056
1057         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1058             perf_evlist__parse_sample(session->evlist, event, sample))
1059                 return -1;
1060
1061         *event_ptr = event;
1062
1063         return 0;
1064 }
1065
1066 static s64 perf_session__process_event(struct perf_session *session,
1067                                        union perf_event *event,
1068                                        struct perf_tool *tool,
1069                                        u64 file_offset)
1070 {
1071         struct perf_sample sample;
1072         int ret;
1073
1074         if (session->header.needs_swap)
1075                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1076
1077         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1078                 return -EINVAL;
1079
1080         events_stats__inc(&session->evlist->stats, event->header.type);
1081
1082         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1083                 return perf_session__process_user_event(session, event, tool, file_offset);
1084
1085         /*
1086          * For all kernel events we get the sample data
1087          */
1088         ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1089         if (ret)
1090                 return ret;
1091
1092         if (tool->ordered_events) {
1093                 ret = perf_session_queue_event(session, event, tool, &sample,
1094                                                file_offset);
1095                 if (ret != -ETIME)
1096                         return ret;
1097         }
1098
1099         return perf_session__deliver_event(session, event, &sample, tool,
1100                                            file_offset);
1101 }
1102
1103 void perf_event_header__bswap(struct perf_event_header *hdr)
1104 {
1105         hdr->type = bswap_32(hdr->type);
1106         hdr->misc = bswap_16(hdr->misc);
1107         hdr->size = bswap_16(hdr->size);
1108 }
1109
1110 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1111 {
1112         return machine__findnew_thread(&session->machines.host, -1, pid);
1113 }
1114
1115 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1116 {
1117         struct thread *thread;
1118
1119         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1120         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1121                 pr_err("problem inserting idle task.\n");
1122                 thread = NULL;
1123         }
1124
1125         return thread;
1126 }
1127
1128 static void perf_tool__warn_about_errors(const struct perf_tool *tool,
1129                                          const struct events_stats *stats)
1130 {
1131         if (tool->lost == perf_event__process_lost &&
1132             stats->nr_events[PERF_RECORD_LOST] != 0) {
1133                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1134                             "Check IO/CPU overload!\n\n",
1135                             stats->nr_events[0],
1136                             stats->nr_events[PERF_RECORD_LOST]);
1137         }
1138
1139         if (stats->nr_unknown_events != 0) {
1140                 ui__warning("Found %u unknown events!\n\n"
1141                             "Is this an older tool processing a perf.data "
1142                             "file generated by a more recent tool?\n\n"
1143                             "If that is not the case, consider "
1144                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1145                             stats->nr_unknown_events);
1146         }
1147
1148         if (stats->nr_unknown_id != 0) {
1149                 ui__warning("%u samples with id not present in the header\n",
1150                             stats->nr_unknown_id);
1151         }
1152
1153         if (stats->nr_invalid_chains != 0) {
1154                 ui__warning("Found invalid callchains!\n\n"
1155                             "%u out of %u events were discarded for this reason.\n\n"
1156                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1157                             stats->nr_invalid_chains,
1158                             stats->nr_events[PERF_RECORD_SAMPLE]);
1159         }
1160
1161         if (stats->nr_unprocessable_samples != 0) {
1162                 ui__warning("%u unprocessable samples recorded.\n"
1163                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1164                             stats->nr_unprocessable_samples);
1165         }
1166
1167         if (stats->nr_unordered_events != 0)
1168                 ui__warning("%u out of order events recorded.\n", stats->nr_unordered_events);
1169 }
1170
1171 volatile int session_done;
1172
1173 static int __perf_session__process_pipe_events(struct perf_session *session,
1174                                                struct perf_tool *tool)
1175 {
1176         int fd = perf_data_file__fd(session->file);
1177         union perf_event *event;
1178         uint32_t size, cur_size = 0;
1179         void *buf = NULL;
1180         s64 skip = 0;
1181         u64 head;
1182         ssize_t err;
1183         void *p;
1184
1185         perf_tool__fill_defaults(tool);
1186
1187         head = 0;
1188         cur_size = sizeof(union perf_event);
1189
1190         buf = malloc(cur_size);
1191         if (!buf)
1192                 return -errno;
1193 more:
1194         event = buf;
1195         err = readn(fd, event, sizeof(struct perf_event_header));
1196         if (err <= 0) {
1197                 if (err == 0)
1198                         goto done;
1199
1200                 pr_err("failed to read event header\n");
1201                 goto out_err;
1202         }
1203
1204         if (session->header.needs_swap)
1205                 perf_event_header__bswap(&event->header);
1206
1207         size = event->header.size;
1208         if (size < sizeof(struct perf_event_header)) {
1209                 pr_err("bad event header size\n");
1210                 goto out_err;
1211         }
1212
1213         if (size > cur_size) {
1214                 void *new = realloc(buf, size);
1215                 if (!new) {
1216                         pr_err("failed to allocate memory to read event\n");
1217                         goto out_err;
1218                 }
1219                 buf = new;
1220                 cur_size = size;
1221                 event = buf;
1222         }
1223         p = event;
1224         p += sizeof(struct perf_event_header);
1225
1226         if (size - sizeof(struct perf_event_header)) {
1227                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1228                 if (err <= 0) {
1229                         if (err == 0) {
1230                                 pr_err("unexpected end of event stream\n");
1231                                 goto done;
1232                         }
1233
1234                         pr_err("failed to read event data\n");
1235                         goto out_err;
1236                 }
1237         }
1238
1239         if ((skip = perf_session__process_event(session, event, tool, head)) < 0) {
1240                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1241                        head, event->header.size, event->header.type);
1242                 err = -EINVAL;
1243                 goto out_err;
1244         }
1245
1246         head += size;
1247
1248         if (skip > 0)
1249                 head += skip;
1250
1251         if (!session_done())
1252                 goto more;
1253 done:
1254         /* do the final flush for ordered samples */
1255         err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1256 out_err:
1257         free(buf);
1258         perf_tool__warn_about_errors(tool, &session->evlist->stats);
1259         ordered_events__free(&session->ordered_events);
1260         return err;
1261 }
1262
1263 static union perf_event *
1264 fetch_mmaped_event(struct perf_session *session,
1265                    u64 head, size_t mmap_size, char *buf)
1266 {
1267         union perf_event *event;
1268
1269         /*
1270          * Ensure we have enough space remaining to read
1271          * the size of the event in the headers.
1272          */
1273         if (head + sizeof(event->header) > mmap_size)
1274                 return NULL;
1275
1276         event = (union perf_event *)(buf + head);
1277
1278         if (session->header.needs_swap)
1279                 perf_event_header__bswap(&event->header);
1280
1281         if (head + event->header.size > mmap_size) {
1282                 /* We're not fetching the event so swap back again */
1283                 if (session->header.needs_swap)
1284                         perf_event_header__bswap(&event->header);
1285                 return NULL;
1286         }
1287
1288         return event;
1289 }
1290
1291 /*
1292  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1293  * slices. On 32bit we use 32MB.
1294  */
1295 #if BITS_PER_LONG == 64
1296 #define MMAP_SIZE ULLONG_MAX
1297 #define NUM_MMAPS 1
1298 #else
1299 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1300 #define NUM_MMAPS 128
1301 #endif
1302
1303 static int __perf_session__process_events(struct perf_session *session,
1304                                           u64 data_offset, u64 data_size,
1305                                           u64 file_size, struct perf_tool *tool)
1306 {
1307         int fd = perf_data_file__fd(session->file);
1308         u64 head, page_offset, file_offset, file_pos, size;
1309         int err, mmap_prot, mmap_flags, map_idx = 0;
1310         size_t  mmap_size;
1311         char *buf, *mmaps[NUM_MMAPS];
1312         union perf_event *event;
1313         struct ui_progress prog;
1314         s64 skip;
1315
1316         perf_tool__fill_defaults(tool);
1317
1318         page_offset = page_size * (data_offset / page_size);
1319         file_offset = page_offset;
1320         head = data_offset - page_offset;
1321
1322         if (data_size && (data_offset + data_size < file_size))
1323                 file_size = data_offset + data_size;
1324
1325         ui_progress__init(&prog, file_size, "Processing events...");
1326
1327         mmap_size = MMAP_SIZE;
1328         if (mmap_size > file_size) {
1329                 mmap_size = file_size;
1330                 session->one_mmap = true;
1331         }
1332
1333         memset(mmaps, 0, sizeof(mmaps));
1334
1335         mmap_prot  = PROT_READ;
1336         mmap_flags = MAP_SHARED;
1337
1338         if (session->header.needs_swap) {
1339                 mmap_prot  |= PROT_WRITE;
1340                 mmap_flags = MAP_PRIVATE;
1341         }
1342 remap:
1343         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1344                    file_offset);
1345         if (buf == MAP_FAILED) {
1346                 pr_err("failed to mmap file\n");
1347                 err = -errno;
1348                 goto out_err;
1349         }
1350         mmaps[map_idx] = buf;
1351         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1352         file_pos = file_offset + head;
1353         if (session->one_mmap) {
1354                 session->one_mmap_addr = buf;
1355                 session->one_mmap_offset = file_offset;
1356         }
1357
1358 more:
1359         event = fetch_mmaped_event(session, head, mmap_size, buf);
1360         if (!event) {
1361                 if (mmaps[map_idx]) {
1362                         munmap(mmaps[map_idx], mmap_size);
1363                         mmaps[map_idx] = NULL;
1364                 }
1365
1366                 page_offset = page_size * (head / page_size);
1367                 file_offset += page_offset;
1368                 head -= page_offset;
1369                 goto remap;
1370         }
1371
1372         size = event->header.size;
1373
1374         if (size < sizeof(struct perf_event_header) ||
1375             (skip = perf_session__process_event(session, event, tool, file_pos))
1376                                                                         < 0) {
1377                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1378                        file_offset + head, event->header.size,
1379                        event->header.type);
1380                 err = -EINVAL;
1381                 goto out_err;
1382         }
1383
1384         if (skip)
1385                 size += skip;
1386
1387         head += size;
1388         file_pos += size;
1389
1390         ui_progress__update(&prog, size);
1391
1392         if (session_done())
1393                 goto out;
1394
1395         if (file_pos < file_size)
1396                 goto more;
1397
1398 out:
1399         /* do the final flush for ordered samples */
1400         err = ordered_events__flush(session, tool, OE_FLUSH__FINAL);
1401 out_err:
1402         ui_progress__finish();
1403         perf_tool__warn_about_errors(tool, &session->evlist->stats);
1404         ordered_events__free(&session->ordered_events);
1405         session->one_mmap = false;
1406         return err;
1407 }
1408
1409 int perf_session__process_events(struct perf_session *session,
1410                                  struct perf_tool *tool)
1411 {
1412         u64 size = perf_data_file__size(session->file);
1413         int err;
1414
1415         if (perf_session__register_idle_thread(session) == NULL)
1416                 return -ENOMEM;
1417
1418         if (!perf_data_file__is_pipe(session->file))
1419                 err = __perf_session__process_events(session,
1420                                                      session->header.data_offset,
1421                                                      session->header.data_size,
1422                                                      size, tool);
1423         else
1424                 err = __perf_session__process_pipe_events(session, tool);
1425
1426         return err;
1427 }
1428
1429 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1430 {
1431         struct perf_evsel *evsel;
1432
1433         evlist__for_each(session->evlist, evsel) {
1434                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1435                         return true;
1436         }
1437
1438         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1439         return false;
1440 }
1441
1442 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1443                                      const char *symbol_name, u64 addr)
1444 {
1445         char *bracket;
1446         enum map_type i;
1447         struct ref_reloc_sym *ref;
1448
1449         ref = zalloc(sizeof(struct ref_reloc_sym));
1450         if (ref == NULL)
1451                 return -ENOMEM;
1452
1453         ref->name = strdup(symbol_name);
1454         if (ref->name == NULL) {
1455                 free(ref);
1456                 return -ENOMEM;
1457         }
1458
1459         bracket = strchr(ref->name, ']');
1460         if (bracket)
1461                 *bracket = '\0';
1462
1463         ref->addr = addr;
1464
1465         for (i = 0; i < MAP__NR_TYPES; ++i) {
1466                 struct kmap *kmap = map__kmap(maps[i]);
1467                 kmap->ref_reloc_sym = ref;
1468         }
1469
1470         return 0;
1471 }
1472
1473 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1474 {
1475         return machines__fprintf_dsos(&session->machines, fp);
1476 }
1477
1478 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1479                                           bool (skip)(struct dso *dso, int parm), int parm)
1480 {
1481         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1482 }
1483
1484 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1485 {
1486         size_t ret = fprintf(fp, "Aggregated stats:\n");
1487
1488         ret += events_stats__fprintf(&session->evlist->stats, fp);
1489         return ret;
1490 }
1491
1492 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1493 {
1494         /*
1495          * FIXME: Here we have to actually print all the machines in this
1496          * session, not just the host...
1497          */
1498         return machine__fprintf(&session->machines.host, fp);
1499 }
1500
1501 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1502                                               unsigned int type)
1503 {
1504         struct perf_evsel *pos;
1505
1506         evlist__for_each(session->evlist, pos) {
1507                 if (pos->attr.type == type)
1508                         return pos;
1509         }
1510         return NULL;
1511 }
1512
1513 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1514                           struct addr_location *al,
1515                           unsigned int print_opts, unsigned int stack_depth)
1516 {
1517         struct callchain_cursor_node *node;
1518         int print_ip = print_opts & PRINT_IP_OPT_IP;
1519         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1520         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1521         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1522         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1523         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1524         char s = print_oneline ? ' ' : '\t';
1525
1526         if (symbol_conf.use_callchain && sample->callchain) {
1527                 struct addr_location node_al;
1528
1529                 if (thread__resolve_callchain(al->thread, evsel,
1530                                               sample, NULL, NULL,
1531                                               PERF_MAX_STACK_DEPTH) != 0) {
1532                         if (verbose)
1533                                 error("Failed to resolve callchain. Skipping\n");
1534                         return;
1535                 }
1536                 callchain_cursor_commit(&callchain_cursor);
1537
1538                 if (print_symoffset)
1539                         node_al = *al;
1540
1541                 while (stack_depth) {
1542                         u64 addr = 0;
1543
1544                         node = callchain_cursor_current(&callchain_cursor);
1545                         if (!node)
1546                                 break;
1547
1548                         if (node->sym && node->sym->ignore)
1549                                 goto next;
1550
1551                         if (print_ip)
1552                                 printf("%c%16" PRIx64, s, node->ip);
1553
1554                         if (node->map)
1555                                 addr = node->map->map_ip(node->map, node->ip);
1556
1557                         if (print_sym) {
1558                                 printf(" ");
1559                                 if (print_symoffset) {
1560                                         node_al.addr = addr;
1561                                         node_al.map  = node->map;
1562                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1563                                 } else
1564                                         symbol__fprintf_symname(node->sym, stdout);
1565                         }
1566
1567                         if (print_dso) {
1568                                 printf(" (");
1569                                 map__fprintf_dsoname(node->map, stdout);
1570                                 printf(")");
1571                         }
1572
1573                         if (print_srcline)
1574                                 map__fprintf_srcline(node->map, addr, "\n  ",
1575                                                      stdout);
1576
1577                         if (!print_oneline)
1578                                 printf("\n");
1579
1580                         stack_depth--;
1581 next:
1582                         callchain_cursor_advance(&callchain_cursor);
1583                 }
1584
1585         } else {
1586                 if (al->sym && al->sym->ignore)
1587                         return;
1588
1589                 if (print_ip)
1590                         printf("%16" PRIx64, sample->ip);
1591
1592                 if (print_sym) {
1593                         printf(" ");
1594                         if (print_symoffset)
1595                                 symbol__fprintf_symname_offs(al->sym, al,
1596                                                              stdout);
1597                         else
1598                                 symbol__fprintf_symname(al->sym, stdout);
1599                 }
1600
1601                 if (print_dso) {
1602                         printf(" (");
1603                         map__fprintf_dsoname(al->map, stdout);
1604                         printf(")");
1605                 }
1606
1607                 if (print_srcline)
1608                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
1609         }
1610 }
1611
1612 int perf_session__cpu_bitmap(struct perf_session *session,
1613                              const char *cpu_list, unsigned long *cpu_bitmap)
1614 {
1615         int i, err = -1;
1616         struct cpu_map *map;
1617
1618         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1619                 struct perf_evsel *evsel;
1620
1621                 evsel = perf_session__find_first_evtype(session, i);
1622                 if (!evsel)
1623                         continue;
1624
1625                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1626                         pr_err("File does not contain CPU events. "
1627                                "Remove -c option to proceed.\n");
1628                         return -1;
1629                 }
1630         }
1631
1632         map = cpu_map__new(cpu_list);
1633         if (map == NULL) {
1634                 pr_err("Invalid cpu_list\n");
1635                 return -1;
1636         }
1637
1638         for (i = 0; i < map->nr; i++) {
1639                 int cpu = map->map[i];
1640
1641                 if (cpu >= MAX_NR_CPUS) {
1642                         pr_err("Requested CPU %d too large. "
1643                                "Consider raising MAX_NR_CPUS\n", cpu);
1644                         goto out_delete_map;
1645                 }
1646
1647                 set_bit(cpu, cpu_bitmap);
1648         }
1649
1650         err = 0;
1651
1652 out_delete_map:
1653         cpu_map__delete(map);
1654         return err;
1655 }
1656
1657 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1658                                 bool full)
1659 {
1660         struct stat st;
1661         int fd, ret;
1662
1663         if (session == NULL || fp == NULL)
1664                 return;
1665
1666         fd = perf_data_file__fd(session->file);
1667
1668         ret = fstat(fd, &st);
1669         if (ret == -1)
1670                 return;
1671
1672         fprintf(fp, "# ========\n");
1673         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1674         perf_header__fprintf_info(session, fp, full);
1675         fprintf(fp, "# ========\n#\n");
1676 }
1677
1678
1679 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1680                                              const struct perf_evsel_str_handler *assocs,
1681                                              size_t nr_assocs)
1682 {
1683         struct perf_evsel *evsel;
1684         size_t i;
1685         int err;
1686
1687         for (i = 0; i < nr_assocs; i++) {
1688                 /*
1689                  * Adding a handler for an event not in the session,
1690                  * just ignore it.
1691                  */
1692                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1693                 if (evsel == NULL)
1694                         continue;
1695
1696                 err = -EEXIST;
1697                 if (evsel->handler != NULL)
1698                         goto out;
1699                 evsel->handler = assocs[i].handler;
1700         }
1701
1702         err = 0;
1703 out:
1704         return err;
1705 }
1706
1707 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
1708                                  union perf_event *event,
1709                                  struct perf_session *session)
1710 {
1711         struct perf_evlist *evlist = session->evlist;
1712         struct id_index_event *ie = &event->id_index;
1713         size_t i, nr, max_nr;
1714
1715         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
1716                  sizeof(struct id_index_entry);
1717         nr = ie->nr;
1718         if (nr > max_nr)
1719                 return -EINVAL;
1720
1721         if (dump_trace)
1722                 fprintf(stdout, " nr: %zu\n", nr);
1723
1724         for (i = 0; i < nr; i++) {
1725                 struct id_index_entry *e = &ie->entries[i];
1726                 struct perf_sample_id *sid;
1727
1728                 if (dump_trace) {
1729                         fprintf(stdout, " ... id: %"PRIu64, e->id);
1730                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
1731                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
1732                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
1733                 }
1734
1735                 sid = perf_evlist__id2sid(evlist, e->id);
1736                 if (!sid)
1737                         return -ENOENT;
1738                 sid->idx = e->idx;
1739                 sid->cpu = e->cpu;
1740                 sid->tid = e->tid;
1741         }
1742         return 0;
1743 }
1744
1745 int perf_event__synthesize_id_index(struct perf_tool *tool,
1746                                     perf_event__handler_t process,
1747                                     struct perf_evlist *evlist,
1748                                     struct machine *machine)
1749 {
1750         union perf_event *ev;
1751         struct perf_evsel *evsel;
1752         size_t nr = 0, i = 0, sz, max_nr, n;
1753         int err;
1754
1755         pr_debug2("Synthesizing id index\n");
1756
1757         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
1758                  sizeof(struct id_index_entry);
1759
1760         evlist__for_each(evlist, evsel)
1761                 nr += evsel->ids;
1762
1763         n = nr > max_nr ? max_nr : nr;
1764         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
1765         ev = zalloc(sz);
1766         if (!ev)
1767                 return -ENOMEM;
1768
1769         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
1770         ev->id_index.header.size = sz;
1771         ev->id_index.nr = n;
1772
1773         evlist__for_each(evlist, evsel) {
1774                 u32 j;
1775
1776                 for (j = 0; j < evsel->ids; j++) {
1777                         struct id_index_entry *e;
1778                         struct perf_sample_id *sid;
1779
1780                         if (i >= n) {
1781                                 err = process(tool, ev, NULL, machine);
1782                                 if (err)
1783                                         goto out_err;
1784                                 nr -= n;
1785                                 i = 0;
1786                         }
1787
1788                         e = &ev->id_index.entries[i++];
1789
1790                         e->id = evsel->id[j];
1791
1792                         sid = perf_evlist__id2sid(evlist, e->id);
1793                         if (!sid) {
1794                                 free(ev);
1795                                 return -ENOENT;
1796                         }
1797
1798                         e->idx = sid->idx;
1799                         e->cpu = sid->cpu;
1800                         e->tid = sid->tid;
1801                 }
1802         }
1803
1804         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
1805         ev->id_index.header.size = sz;
1806         ev->id_index.nr = nr;
1807
1808         err = process(tool, ev, NULL, machine);
1809 out_err:
1810         free(ev);
1811
1812         return err;
1813 }