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 #include "auxtrace.h"
  19 #include "thread-stack.h"
  20 #include "stat.h"
  21
  22 static int perf_session__deliver_event(struct perf_session *session,
  23                                        union perf_event *event,
  24                                        struct perf_sample *sample,
  25                                        struct perf_tool *tool,
  26                                        u64 file_offset);
  27
  28 static int perf_session__open(struct perf_session *session)
  29 {
  30         struct perf_data_file *file = session->file;
  31
  32         if (perf_session__read_header(session) < 0) {
  33                 pr_err("incompatible file format (rerun with -v to learn more)\n");
  34                 return -1;
  35         }
  36
  37         if (perf_data_file__is_pipe(file))
  38                 return 0;
  39
  40         if (perf_header__has_feat(&session->header, HEADER_STAT))
  41                 return 0;
  42
  43         if (!perf_evlist__valid_sample_type(session->evlist)) {
  44                 pr_err("non matching sample_type\n");
  45                 return -1;
  46         }
  47
  48         if (!perf_evlist__valid_sample_id_all(session->evlist)) {
  49                 pr_err("non matching sample_id_all\n");
  50                 return -1;
  51         }
  52
  53         if (!perf_evlist__valid_read_format(session->evlist)) {
  54                 pr_err("non matching read_format\n");
  55                 return -1;
  56         }
  57
  58         return 0;
  59 }
  60
  61 void perf_session__set_id_hdr_size(struct perf_session *session)
  62 {
  63         u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
  64
  65         machines__set_id_hdr_size(&session->machines, id_hdr_size);
  66 }
  67
  68 int perf_session__create_kernel_maps(struct perf_session *session)
  69 {
  70         int ret = machine__create_kernel_maps(&session->machines.host);
  71
  72         if (ret >= 0)
  73                 ret = machines__create_guest_kernel_maps(&session->machines);
  74         return ret;
  75 }
  76
  77 static void perf_session__destroy_kernel_maps(struct perf_session *session)
  78 {
  79         machines__destroy_kernel_maps(&session->machines);
  80 }
  81
  82 static bool perf_session__has_comm_exec(struct perf_session *session)
  83 {
  84         struct perf_evsel *evsel;
  85
  86         evlist__for_each(session->evlist, evsel) {
  87                 if (evsel->attr.comm_exec)
  88                         return true;
  89         }
  90
  91         return false;
  92 }
  93
  94 static void perf_session__set_comm_exec(struct perf_session *session)
  95 {
  96         bool comm_exec = perf_session__has_comm_exec(session);
  97
  98         machines__set_comm_exec(&session->machines, comm_exec);
  99 }
 100
 101 static int ordered_events__deliver_event(struct ordered_events *oe,
 102                                          struct ordered_event *event)
 103 {
 104         struct perf_sample sample;
 105         struct perf_session *session = container_of(oe, struct perf_session,
 106                                                     ordered_events);
 107         int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
 108
 109         if (ret) {
 110                 pr_err("Can't parse sample, err = %d\n", ret);
 111                 return ret;
 112         }
 113
 114         return perf_session__deliver_event(session, event->event, &sample,
 115                                            session->tool, event->file_offset);
 116 }
 117
 118 struct perf_session *perf_session__new(struct perf_data_file *file,
 119                                        bool repipe, struct perf_tool *tool)
 120 {
 121         struct perf_session *session = zalloc(sizeof(*session));
 122
 123         if (!session)
 124                 goto out;
 125
 126         session->repipe = repipe;
 127         session->tool   = tool;
 128         INIT_LIST_HEAD(&session->auxtrace_index);
 129         machines__init(&session->machines);
 130         ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
 131
 132         if (file) {
 133                 if (perf_data_file__open(file))
 134                         goto out_delete;
 135
 136                 session->file = file;
 137
 138                 if (perf_data_file__is_read(file)) {
 139                         if (perf_session__open(session) < 0)
 140                                 goto out_close;
 141
 142                         perf_session__set_id_hdr_size(session);
 143                         perf_session__set_comm_exec(session);
 144                 }
 145         } else  {
 146                 session->machines.host.env = &perf_env;
 147         }
 148
 149         if (!file || perf_data_file__is_write(file)) {
 150                 /*
 151                  * In O_RDONLY mode this will be performed when reading the
 152                  * kernel MMAP event, in perf_event__process_mmap().
 153                  */
 154                 if (perf_session__create_kernel_maps(session) < 0)
 155                         pr_warning("Cannot read kernel map\n");
 156         }
 157
 158         if (tool && tool->ordering_requires_timestamps &&
 159             tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
 160                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 161                 tool->ordered_events = false;
 162         }
 163
 164         return session;
 165
 166  out_close:
 167         perf_data_file__close(file);
 168  out_delete:
 169         perf_session__delete(session);
 170  out:
 171         return NULL;
 172 }
 173
 174 static void perf_session__delete_threads(struct perf_session *session)
 175 {
 176         machine__delete_threads(&session->machines.host);
 177 }
 178
 179 void perf_session__delete(struct perf_session *session)
 180 {
 181         auxtrace__free(session);
 182         auxtrace_index__free(&session->auxtrace_index);
 183         perf_session__destroy_kernel_maps(session);
 184         perf_session__delete_threads(session);
 185         perf_env__exit(&session->header.env);
 186         machines__exit(&session->machines);
 187         if (session->file)
 188                 perf_data_file__close(session->file);
 189         free(session);
 190 }
 191
 192 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 193                                                  __maybe_unused,
 194                                                  union perf_event *event
 195                                                  __maybe_unused,
 196                                                  struct perf_session *session
 197                                                 __maybe_unused)
 198 {
 199         dump_printf(": unhandled!\n");
 200         return 0;
 201 }
 202
 203 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 204                                          union perf_event *event __maybe_unused,
 205                                          struct perf_evlist **pevlist
 206                                          __maybe_unused)
 207 {
 208         dump_printf(": unhandled!\n");
 209         return 0;
 210 }
 211
 212 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
 213                                                  union perf_event *event __maybe_unused,
 214                                                  struct perf_evlist **pevlist
 215                                                  __maybe_unused)
 216 {
 217         if (dump_trace)
 218                 perf_event__fprintf_event_update(event, stdout);
 219
 220         dump_printf(": unhandled!\n");
 221         return 0;
 222 }
 223
 224 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 225                                      union perf_event *event __maybe_unused,
 226                                      struct perf_sample *sample __maybe_unused,
 227                                      struct perf_evsel *evsel __maybe_unused,
 228                                      struct machine *machine __maybe_unused)
 229 {
 230         dump_printf(": unhandled!\n");
 231         return 0;
 232 }
 233
 234 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 235                               union perf_event *event __maybe_unused,
 236                               struct perf_sample *sample __maybe_unused,
 237                               struct machine *machine __maybe_unused)
 238 {
 239         dump_printf(": unhandled!\n");
 240         return 0;
 241 }
 242
 243 static int process_build_id_stub(struct perf_tool *tool __maybe_unused,
 244                                  union perf_event *event __maybe_unused,
 245                                  struct perf_session *session __maybe_unused)
 246 {
 247         dump_printf(": unhandled!\n");
 248         return 0;
 249 }
 250
 251 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 252                                        union perf_event *event __maybe_unused,
 253                                        struct ordered_events *oe __maybe_unused)
 254 {
 255         dump_printf(": unhandled!\n");
 256         return 0;
 257 }
 258
 259 static int process_finished_round(struct perf_tool *tool,
 260                                   union perf_event *event,
 261                                   struct ordered_events *oe);
 262
 263 static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
 264                                  union perf_event *event __maybe_unused,
 265                                  struct perf_session *perf_session
 266                                  __maybe_unused)
 267 {
 268         dump_printf(": unhandled!\n");
 269         return 0;
 270 }
 271
 272 static int process_event_auxtrace_info_stub(struct perf_tool *tool __maybe_unused,
 273                                 union perf_event *event __maybe_unused,
 274                                 struct perf_session *session __maybe_unused)
 275 {
 276         dump_printf(": unhandled!\n");
 277         return 0;
 278 }
 279
 280 static int skipn(int fd, off_t n)
 281 {
 282         char buf[4096];
 283         ssize_t ret;
 284
 285         while (n > 0) {
 286                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 287                 if (ret <= 0)
 288                         return ret;
 289                 n -= ret;
 290         }
 291
 292         return 0;
 293 }
 294
 295 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
 296                                        union perf_event *event,
 297                                        struct perf_session *session
 298                                        __maybe_unused)
 299 {
 300         dump_printf(": unhandled!\n");
 301         if (perf_data_file__is_pipe(session->file))
 302                 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
 303         return event->auxtrace.size;
 304 }
 305
 306 static
 307 int process_event_auxtrace_error_stub(struct perf_tool *tool __maybe_unused,
 308                                       union perf_event *event __maybe_unused,
 309                                       struct perf_session *session __maybe_unused)
 310 {
 311         dump_printf(": unhandled!\n");
 312         return 0;
 313 }
 314
 315
 316 static
 317 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
 318                                   union perf_event *event __maybe_unused,
 319                                   struct perf_session *session __maybe_unused)
 320 {
 321         if (dump_trace)
 322                 perf_event__fprintf_thread_map(event, stdout);
 323
 324         dump_printf(": unhandled!\n");
 325         return 0;
 326 }
 327
 328 static
 329 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
 330                                union perf_event *event __maybe_unused,
 331                                struct perf_session *session __maybe_unused)
 332 {
 333         if (dump_trace)
 334                 perf_event__fprintf_cpu_map(event, stdout);
 335
 336         dump_printf(": unhandled!\n");
 337         return 0;
 338 }
 339
 340 static
 341 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
 342                                    union perf_event *event __maybe_unused,
 343                                    struct perf_session *session __maybe_unused)
 344 {
 345         if (dump_trace)
 346                 perf_event__fprintf_stat_config(event, stdout);
 347
 348         dump_printf(": unhandled!\n");
 349         return 0;
 350 }
 351
 352 static int process_stat_stub(struct perf_tool *tool __maybe_unused,
 353                              union perf_event *event __maybe_unused,
 354                              struct perf_session *perf_session
 355                              __maybe_unused)
 356 {
 357         if (dump_trace)
 358                 perf_event__fprintf_stat(event, stdout);
 359
 360         dump_printf(": unhandled!\n");
 361         return 0;
 362 }
 363
 364 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
 365                                    union perf_event *event __maybe_unused,
 366                                    struct perf_session *perf_session
 367                                    __maybe_unused)
 368 {
 369         if (dump_trace)
 370                 perf_event__fprintf_stat_round(event, stdout);
 371
 372         dump_printf(": unhandled!\n");
 373         return 0;
 374 }
 375
 376 void perf_tool__fill_defaults(struct perf_tool *tool)
 377 {
 378         if (tool->sample == NULL)
 379                 tool->sample = process_event_sample_stub;
 380         if (tool->mmap == NULL)
 381                 tool->mmap = process_event_stub;
 382         if (tool->mmap2 == NULL)
 383                 tool->mmap2 = process_event_stub;
 384         if (tool->comm == NULL)
 385                 tool->comm = process_event_stub;
 386         if (tool->fork == NULL)
 387                 tool->fork = process_event_stub;
 388         if (tool->exit == NULL)
 389                 tool->exit = process_event_stub;
 390         if (tool->lost == NULL)
 391                 tool->lost = perf_event__process_lost;
 392         if (tool->lost_samples == NULL)
 393                 tool->lost_samples = perf_event__process_lost_samples;
 394         if (tool->aux == NULL)
 395                 tool->aux = perf_event__process_aux;
 396         if (tool->itrace_start == NULL)
 397                 tool->itrace_start = perf_event__process_itrace_start;
 398         if (tool->context_switch == NULL)
 399                 tool->context_switch = perf_event__process_switch;
 400         if (tool->read == NULL)
 401                 tool->read = process_event_sample_stub;
 402         if (tool->throttle == NULL)
 403                 tool->throttle = process_event_stub;
 404         if (tool->unthrottle == NULL)
 405                 tool->unthrottle = process_event_stub;
 406         if (tool->attr == NULL)
 407                 tool->attr = process_event_synth_attr_stub;
 408         if (tool->event_update == NULL)
 409                 tool->event_update = process_event_synth_event_update_stub;
 410         if (tool->tracing_data == NULL)
 411                 tool->tracing_data = process_event_synth_tracing_data_stub;
 412         if (tool->build_id == NULL)
 413                 tool->build_id = process_build_id_stub;
 414         if (tool->finished_round == NULL) {
 415                 if (tool->ordered_events)
 416                         tool->finished_round = process_finished_round;
 417                 else
 418                         tool->finished_round = process_finished_round_stub;
 419         }
 420         if (tool->id_index == NULL)
 421                 tool->id_index = process_id_index_stub;
 422         if (tool->auxtrace_info == NULL)
 423                 tool->auxtrace_info = process_event_auxtrace_info_stub;
 424         if (tool->auxtrace == NULL)
 425                 tool->auxtrace = process_event_auxtrace_stub;
 426         if (tool->auxtrace_error == NULL)
 427                 tool->auxtrace_error = process_event_auxtrace_error_stub;
 428         if (tool->thread_map == NULL)
 429                 tool->thread_map = process_event_thread_map_stub;
 430         if (tool->cpu_map == NULL)
 431                 tool->cpu_map = process_event_cpu_map_stub;
 432         if (tool->stat_config == NULL)
 433                 tool->stat_config = process_event_stat_config_stub;
 434         if (tool->stat == NULL)
 435                 tool->stat = process_stat_stub;
 436         if (tool->stat_round == NULL)
 437                 tool->stat_round = process_stat_round_stub;
 438 }
 439
 440 static void swap_sample_id_all(union perf_event *event, void *data)
 441 {
 442         void *end = (void *) event + event->header.size;
 443         int size = end - data;
 444
 445         BUG_ON(size % sizeof(u64));
 446         mem_bswap_64(data, size);
 447 }
 448
 449 static void perf_event__all64_swap(union perf_event *event,
 450                                    bool sample_id_all __maybe_unused)
 451 {
 452         struct perf_event_header *hdr = &event->header;
 453         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 454 }
 455
 456 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 457 {
 458         event->comm.pid = bswap_32(event->comm.pid);
 459         event->comm.tid = bswap_32(event->comm.tid);
 460
 461         if (sample_id_all) {
 462                 void *data = &event->comm.comm;
 463
 464                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 465                 swap_sample_id_all(event, data);
 466         }
 467 }
 468
 469 static void perf_event__mmap_swap(union perf_event *event,
 470                                   bool sample_id_all)
 471 {
 472         event->mmap.pid   = bswap_32(event->mmap.pid);
 473         event->mmap.tid   = bswap_32(event->mmap.tid);
 474         event->mmap.start = bswap_64(event->mmap.start);
 475         event->mmap.len   = bswap_64(event->mmap.len);
 476         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 477
 478         if (sample_id_all) {
 479                 void *data = &event->mmap.filename;
 480
 481                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 482                 swap_sample_id_all(event, data);
 483         }
 484 }
 485
 486 static void perf_event__mmap2_swap(union perf_event *event,
 487                                   bool sample_id_all)
 488 {
 489         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 490         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 491         event->mmap2.start = bswap_64(event->mmap2.start);
 492         event->mmap2.len   = bswap_64(event->mmap2.len);
 493         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 494         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 495         event->mmap2.min   = bswap_32(event->mmap2.min);
 496         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 497
 498         if (sample_id_all) {
 499                 void *data = &event->mmap2.filename;
 500
 501                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 502                 swap_sample_id_all(event, data);
 503         }
 504 }
 505 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 506 {
 507         event->fork.pid  = bswap_32(event->fork.pid);
 508         event->fork.tid  = bswap_32(event->fork.tid);
 509         event->fork.ppid = bswap_32(event->fork.ppid);
 510         event->fork.ptid = bswap_32(event->fork.ptid);
 511         event->fork.time = bswap_64(event->fork.time);
 512
 513         if (sample_id_all)
 514                 swap_sample_id_all(event, &event->fork + 1);
 515 }
 516
 517 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 518 {
 519         event->read.pid          = bswap_32(event->read.pid);
 520         event->read.tid          = bswap_32(event->read.tid);
 521         event->read.value        = bswap_64(event->read.value);
 522         event->read.time_enabled = bswap_64(event->read.time_enabled);
 523         event->read.time_running = bswap_64(event->read.time_running);
 524         event->read.id           = bswap_64(event->read.id);
 525
 526         if (sample_id_all)
 527                 swap_sample_id_all(event, &event->read + 1);
 528 }
 529
 530 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 531 {
 532         event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 533         event->aux.aux_size   = bswap_64(event->aux.aux_size);
 534         event->aux.flags      = bswap_64(event->aux.flags);
 535
 536         if (sample_id_all)
 537                 swap_sample_id_all(event, &event->aux + 1);
 538 }
 539
 540 static void perf_event__itrace_start_swap(union perf_event *event,
 541                                           bool sample_id_all)
 542 {
 543         event->itrace_start.pid  = bswap_32(event->itrace_start.pid);
 544         event->itrace_start.tid  = bswap_32(event->itrace_start.tid);
 545
 546         if (sample_id_all)
 547                 swap_sample_id_all(event, &event->itrace_start + 1);
 548 }
 549
 550 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 551 {
 552         if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 553                 event->context_switch.next_prev_pid =
 554                                 bswap_32(event->context_switch.next_prev_pid);
 555                 event->context_switch.next_prev_tid =
 556                                 bswap_32(event->context_switch.next_prev_tid);
 557         }
 558
 559         if (sample_id_all)
 560                 swap_sample_id_all(event, &event->context_switch + 1);
 561 }
 562
 563 static void perf_event__throttle_swap(union perf_event *event,
 564                                       bool sample_id_all)
 565 {
 566         event->throttle.time      = bswap_64(event->throttle.time);
 567         event->throttle.id        = bswap_64(event->throttle.id);
 568         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 569
 570         if (sample_id_all)
 571                 swap_sample_id_all(event, &event->throttle + 1);
 572 }
 573
 574 static u8 revbyte(u8 b)
 575 {
 576         int rev = (b >> 4) | ((b & 0xf) << 4);
 577         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 578         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 579         return (u8) rev;
 580 }
 581
 582 /*
 583  * XXX this is hack in attempt to carry flags bitfield
 584  * throught endian village. ABI says:
 585  *
 586  * Bit-fields are allocated from right to left (least to most significant)
 587  * on little-endian implementations and from left to right (most to least
 588  * significant) on big-endian implementations.
 589  *
 590  * The above seems to be byte specific, so we need to reverse each
 591  * byte of the bitfield. 'Internet' also says this might be implementation
 592  * specific and we probably need proper fix and carry perf_event_attr
 593  * bitfield flags in separate data file FEAT_ section. Thought this seems
 594  * to work for now.
 595  */
 596 static void swap_bitfield(u8 *p, unsigned len)
 597 {
 598         unsigned i;
 599
 600         for (i = 0; i < len; i++) {
 601                 *p = revbyte(*p);
 602                 p++;
 603         }
 604 }
 605
 606 /* exported for swapping attributes in file header */
 607 void perf_event__attr_swap(struct perf_event_attr *attr)
 608 {
 609         attr->type              = bswap_32(attr->type);
 610         attr->size              = bswap_32(attr->size);
 611
 612 #define bswap_safe(f, n)                                        \
 613         (attr->size > (offsetof(struct perf_event_attr, f) +    \
 614                        sizeof(attr->f) * (n)))
 615 #define bswap_field(f, sz)                      \
 616 do {                                            \
 617         if (bswap_safe(f, 0))                   \
 618                 attr->f = bswap_##sz(attr->f);  \
 619 } while(0)
 620 #define bswap_field_32(f) bswap_field(f, 32)
 621 #define bswap_field_64(f) bswap_field(f, 64)
 622
 623         bswap_field_64(config);
 624         bswap_field_64(sample_period);
 625         bswap_field_64(sample_type);
 626         bswap_field_64(read_format);
 627         bswap_field_32(wakeup_events);
 628         bswap_field_32(bp_type);
 629         bswap_field_64(bp_addr);
 630         bswap_field_64(bp_len);
 631         bswap_field_64(branch_sample_type);
 632         bswap_field_64(sample_regs_user);
 633         bswap_field_32(sample_stack_user);
 634         bswap_field_32(aux_watermark);
 635
 636         /*
 637          * After read_format are bitfields. Check read_format because
 638          * we are unable to use offsetof on bitfield.
 639          */
 640         if (bswap_safe(read_format, 1))
 641                 swap_bitfield((u8 *) (&attr->read_format + 1),
 642                               sizeof(u64));
 643 #undef bswap_field_64
 644 #undef bswap_field_32
 645 #undef bswap_field
 646 #undef bswap_safe
 647 }
 648
 649 static void perf_event__hdr_attr_swap(union perf_event *event,
 650                                       bool sample_id_all __maybe_unused)
 651 {
 652         size_t size;
 653
 654         perf_event__attr_swap(&event->attr.attr);
 655
 656         size = event->header.size;
 657         size -= (void *)&event->attr.id - (void *)event;
 658         mem_bswap_64(event->attr.id, size);
 659 }
 660
 661 static void perf_event__event_update_swap(union perf_event *event,
 662                                           bool sample_id_all __maybe_unused)
 663 {
 664         event->event_update.type = bswap_64(event->event_update.type);
 665         event->event_update.id   = bswap_64(event->event_update.id);
 666 }
 667
 668 static void perf_event__event_type_swap(union perf_event *event,
 669                                         bool sample_id_all __maybe_unused)
 670 {
 671         event->event_type.event_type.event_id =
 672                 bswap_64(event->event_type.event_type.event_id);
 673 }
 674
 675 static void perf_event__tracing_data_swap(union perf_event *event,
 676                                           bool sample_id_all __maybe_unused)
 677 {
 678         event->tracing_data.size = bswap_32(event->tracing_data.size);
 679 }
 680
 681 static void perf_event__auxtrace_info_swap(union perf_event *event,
 682                                            bool sample_id_all __maybe_unused)
 683 {
 684         size_t size;
 685
 686         event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 687
 688         size = event->header.size;
 689         size -= (void *)&event->auxtrace_info.priv - (void *)event;
 690         mem_bswap_64(event->auxtrace_info.priv, size);
 691 }
 692
 693 static void perf_event__auxtrace_swap(union perf_event *event,
 694                                       bool sample_id_all __maybe_unused)
 695 {
 696         event->auxtrace.size      = bswap_64(event->auxtrace.size);
 697         event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 698         event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 699         event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 700         event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 701         event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 702 }
 703
 704 static void perf_event__auxtrace_error_swap(union perf_event *event,
 705                                             bool sample_id_all __maybe_unused)
 706 {
 707         event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 708         event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 709         event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 710         event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 711         event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 712         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 713 }
 714
 715 static void perf_event__thread_map_swap(union perf_event *event,
 716                                         bool sample_id_all __maybe_unused)
 717 {
 718         unsigned i;
 719
 720         event->thread_map.nr = bswap_64(event->thread_map.nr);
 721
 722         for (i = 0; i < event->thread_map.nr; i++)
 723                 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
 724 }
 725
 726 static void perf_event__cpu_map_swap(union perf_event *event,
 727                                      bool sample_id_all __maybe_unused)
 728 {
 729         struct cpu_map_data *data = &event->cpu_map.data;
 730         struct cpu_map_entries *cpus;
 731         struct cpu_map_mask *mask;
 732         unsigned i;
 733
 734         data->type = bswap_64(data->type);
 735
 736         switch (data->type) {
 737         case PERF_CPU_MAP__CPUS:
 738                 cpus = (struct cpu_map_entries *)data->data;
 739
 740                 cpus->nr = bswap_16(cpus->nr);
 741
 742                 for (i = 0; i < cpus->nr; i++)
 743                         cpus->cpu[i] = bswap_16(cpus->cpu[i]);
 744                 break;
 745         case PERF_CPU_MAP__MASK:
 746                 mask = (struct cpu_map_mask *) data->data;
 747
 748                 mask->nr = bswap_16(mask->nr);
 749                 mask->long_size = bswap_16(mask->long_size);
 750
 751                 switch (mask->long_size) {
 752                 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
 753                 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
 754                 default:
 755                         pr_err("cpu_map swap: unsupported long size\n");
 756                 }
 757         default:
 758                 break;
 759         }
 760 }
 761
 762 static void perf_event__stat_config_swap(union perf_event *event,
 763                                          bool sample_id_all __maybe_unused)
 764 {
 765         u64 size;
 766
 767         size  = event->stat_config.nr * sizeof(event->stat_config.data[0]);
 768         size += 1; /* nr item itself */
 769         mem_bswap_64(&event->stat_config.nr, size);
 770 }
 771
 772 static void perf_event__stat_swap(union perf_event *event,
 773                                   bool sample_id_all __maybe_unused)
 774 {
 775         event->stat.id     = bswap_64(event->stat.id);
 776         event->stat.thread = bswap_32(event->stat.thread);
 777         event->stat.cpu    = bswap_32(event->stat.cpu);
 778         event->stat.val    = bswap_64(event->stat.val);
 779         event->stat.ena    = bswap_64(event->stat.ena);
 780         event->stat.run    = bswap_64(event->stat.run);
 781 }
 782
 783 static void perf_event__stat_round_swap(union perf_event *event,
 784                                         bool sample_id_all __maybe_unused)
 785 {
 786         event->stat_round.type = bswap_64(event->stat_round.type);
 787         event->stat_round.time = bswap_64(event->stat_round.time);
 788 }
 789
 790 typedef void (*perf_event__swap_op)(union perf_event *event,
 791                                     bool sample_id_all);
 792
 793 static perf_event__swap_op perf_event__swap_ops[] = {
 794         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 795         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 796         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 797         [PERF_RECORD_FORK]                = perf_event__task_swap,
 798         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 799         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 800         [PERF_RECORD_READ]                = perf_event__read_swap,
 801         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 802         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 803         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 804         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
 805         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
 806         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
 807         [PERF_RECORD_SWITCH]              = perf_event__switch_swap,
 808         [PERF_RECORD_SWITCH_CPU_WIDE]     = perf_event__switch_swap,
 809         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 810         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 811         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 812         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 813         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
 814         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
 815         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
 816         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
 817         [PERF_RECORD_THREAD_MAP]          = perf_event__thread_map_swap,
 818         [PERF_RECORD_CPU_MAP]             = perf_event__cpu_map_swap,
 819         [PERF_RECORD_STAT_CONFIG]         = perf_event__stat_config_swap,
 820         [PERF_RECORD_STAT]                = perf_event__stat_swap,
 821         [PERF_RECORD_STAT_ROUND]          = perf_event__stat_round_swap,
 822         [PERF_RECORD_EVENT_UPDATE]        = perf_event__event_update_swap,
 823         [PERF_RECORD_HEADER_MAX]          = NULL,
 824 };
 825
 826 /*
 827  * When perf record finishes a pass on every buffers, it records this pseudo
 828  * event.
 829  * We record the max timestamp t found in the pass n.
 830  * Assuming these timestamps are monotonic across cpus, we know that if
 831  * a buffer still has events with timestamps below t, they will be all
 832  * available and then read in the pass n + 1.
 833  * Hence when we start to read the pass n + 2, we can safely flush every
 834  * events with timestamps below t.
 835  *
 836  *    ============ PASS n =================
 837  *       CPU 0         |   CPU 1
 838  *                     |
 839  *    cnt1 timestamps  |   cnt2 timestamps
 840  *          1          |         2
 841  *          2          |         3
 842  *          -          |         4  <--- max recorded
 843  *
 844  *    ============ PASS n + 1 ==============
 845  *       CPU 0         |   CPU 1
 846  *                     |
 847  *    cnt1 timestamps  |   cnt2 timestamps
 848  *          3          |         5
 849  *          4          |         6
 850  *          5          |         7 <---- max recorded
 851  *
 852  *      Flush every events below timestamp 4
 853  *
 854  *    ============ PASS n + 2 ==============
 855  *       CPU 0         |   CPU 1
 856  *                     |
 857  *    cnt1 timestamps  |   cnt2 timestamps
 858  *          6          |         8
 859  *          7          |         9
 860  *          -          |         10
 861  *
 862  *      Flush every events below timestamp 7
 863  *      etc...
 864  */
 865 static int process_finished_round(struct perf_tool *tool __maybe_unused,
 866                                   union perf_event *event __maybe_unused,
 867                                   struct ordered_events *oe)
 868 {
 869         if (dump_trace)
 870                 fprintf(stdout, "\n");
 871         return ordered_events__flush(oe, OE_FLUSH__ROUND);
 872 }
 873
 874 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
 875                               struct perf_sample *sample, u64 file_offset)
 876 {
 877         return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
 878 }
 879
 880 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 881 {
 882         struct ip_callchain *callchain = sample->callchain;
 883         struct branch_stack *lbr_stack = sample->branch_stack;
 884         u64 kernel_callchain_nr = callchain->nr;
 885         unsigned int i;
 886
 887         for (i = 0; i < kernel_callchain_nr; i++) {
 888                 if (callchain->ips[i] == PERF_CONTEXT_USER)
 889                         break;
 890         }
 891
 892         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 893                 u64 total_nr;
 894                 /*
 895                  * LBR callstack can only get user call chain,
 896                  * i is kernel call chain number,
 897                  * 1 is PERF_CONTEXT_USER.
 898                  *
 899                  * The user call chain is stored in LBR registers.
 900                  * LBR are pair registers. The caller is stored
 901                  * in "from" register, while the callee is stored
 902                  * in "to" register.
 903                  * For example, there is a call stack
 904                  * "A"->"B"->"C"->"D".
 905                  * The LBR registers will recorde like
 906                  * "C"->"D", "B"->"C", "A"->"B".
 907                  * So only the first "to" register and all "from"
 908                  * registers are needed to construct the whole stack.
 909                  */
 910                 total_nr = i + 1 + lbr_stack->nr + 1;
 911                 kernel_callchain_nr = i + 1;
 912
 913                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 914
 915                 for (i = 0; i < kernel_callchain_nr; i++)
 916                         printf("..... %2d: %016" PRIx64 "\n",
 917                                i, callchain->ips[i]);
 918
 919                 printf("..... %2d: %016" PRIx64 "\n",
 920                        (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 921                 for (i = 0; i < lbr_stack->nr; i++)
 922                         printf("..... %2d: %016" PRIx64 "\n",
 923                                (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 924         }
 925 }
 926
 927 static void callchain__printf(struct perf_evsel *evsel,
 928                               struct perf_sample *sample)
 929 {
 930         unsigned int i;
 931         struct ip_callchain *callchain = sample->callchain;
 932
 933         if (has_branch_callstack(evsel))
 934                 callchain__lbr_callstack_printf(sample);
 935
 936         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 937
 938         for (i = 0; i < callchain->nr; i++)
 939                 printf("..... %2d: %016" PRIx64 "\n",
 940                        i, callchain->ips[i]);
 941 }
 942
 943 static void branch_stack__printf(struct perf_sample *sample)
 944 {
 945         uint64_t i;
 946
 947         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 948
 949         for (i = 0; i < sample->branch_stack->nr; i++) {
 950                 struct branch_entry *e = &sample->branch_stack->entries[i];
 951
 952                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
 953                         i, e->from, e->to,
 954                         e->flags.cycles,
 955                         e->flags.mispred ? "M" : " ",
 956                         e->flags.predicted ? "P" : " ",
 957                         e->flags.abort ? "A" : " ",
 958                         e->flags.in_tx ? "T" : " ",
 959                         (unsigned)e->flags.reserved);
 960         }
 961 }
 962
 963 static void regs_dump__printf(u64 mask, u64 *regs)
 964 {
 965         unsigned rid, i = 0;
 966
 967         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 968                 u64 val = regs[i++];
 969
 970                 printf(".... %-5s 0x%" PRIx64 "\n",
 971                        perf_reg_name(rid), val);
 972         }
 973 }
 974
 975 static const char *regs_abi[] = {
 976         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
 977         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 978         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 979 };
 980
 981 static inline const char *regs_dump_abi(struct regs_dump *d)
 982 {
 983         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 984                 return "unknown";
 985
 986         return regs_abi[d->abi];
 987 }
 988
 989 static void regs__printf(const char *type, struct regs_dump *regs)
 990 {
 991         u64 mask = regs->mask;
 992
 993         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 994                type,
 995                mask,
 996                regs_dump_abi(regs));
 997
 998         regs_dump__printf(mask, regs->regs);
 999 }
1000
1001 static void regs_user__printf(struct perf_sample *sample)
1002 {
1003         struct regs_dump *user_regs = &sample->user_regs;
1004
1005         if (user_regs->regs)
1006                 regs__printf("user", user_regs);
1007 }
1008
1009 static void regs_intr__printf(struct perf_sample *sample)
1010 {
1011         struct regs_dump *intr_regs = &sample->intr_regs;
1012
1013         if (intr_regs->regs)
1014                 regs__printf("intr", intr_regs);
1015 }
1016
1017 static void stack_user__printf(struct stack_dump *dump)
1018 {
1019         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1020                dump->size, dump->offset);
1021 }
1022
1023 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1024                                        union perf_event *event,
1025                                        struct perf_sample *sample)
1026 {
1027         u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1028
1029         if (event->header.type != PERF_RECORD_SAMPLE &&
1030             !perf_evlist__sample_id_all(evlist)) {
1031                 fputs("-1 -1 ", stdout);
1032                 return;
1033         }
1034
1035         if ((sample_type & PERF_SAMPLE_CPU))
1036                 printf("%u ", sample->cpu);
1037
1038         if (sample_type & PERF_SAMPLE_TIME)
1039                 printf("%" PRIu64 " ", sample->time);
1040 }
1041
1042 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1043 {
1044         printf("... sample_read:\n");
1045
1046         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1047                 printf("...... time enabled %016" PRIx64 "\n",
1048                        sample->read.time_enabled);
1049
1050         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1051                 printf("...... time running %016" PRIx64 "\n",
1052                        sample->read.time_running);
1053
1054         if (read_format & PERF_FORMAT_GROUP) {
1055                 u64 i;
1056
1057                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1058
1059                 for (i = 0; i < sample->read.group.nr; i++) {
1060                         struct sample_read_value *value;
1061
1062                         value = &sample->read.group.values[i];
1063                         printf("..... id %016" PRIx64
1064                                ", value %016" PRIx64 "\n",
1065                                value->id, value->value);
1066                 }
1067         } else
1068                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1069                         sample->read.one.id, sample->read.one.value);
1070 }
1071
1072 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1073                        u64 file_offset, struct perf_sample *sample)
1074 {
1075         if (!dump_trace)
1076                 return;
1077
1078         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1079                file_offset, event->header.size, event->header.type);
1080
1081         trace_event(event);
1082
1083         if (sample)
1084                 perf_evlist__print_tstamp(evlist, event, sample);
1085
1086         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1087                event->header.size, perf_event__name(event->header.type));
1088 }
1089
1090 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1091                         struct perf_sample *sample)
1092 {
1093         u64 sample_type;
1094
1095         if (!dump_trace)
1096                 return;
1097
1098         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1099                event->header.misc, sample->pid, sample->tid, sample->ip,
1100                sample->period, sample->addr);
1101
1102         sample_type = evsel->attr.sample_type;
1103
1104         if (sample_type & PERF_SAMPLE_CALLCHAIN)
1105                 callchain__printf(evsel, sample);
1106
1107         if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
1108                 branch_stack__printf(sample);
1109
1110         if (sample_type & PERF_SAMPLE_REGS_USER)
1111                 regs_user__printf(sample);
1112
1113         if (sample_type & PERF_SAMPLE_REGS_INTR)
1114                 regs_intr__printf(sample);
1115
1116         if (sample_type & PERF_SAMPLE_STACK_USER)
1117                 stack_user__printf(&sample->user_stack);
1118
1119         if (sample_type & PERF_SAMPLE_WEIGHT)
1120                 printf("... weight: %" PRIu64 "\n", sample->weight);
1121
1122         if (sample_type & PERF_SAMPLE_DATA_SRC)
1123                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1124
1125         if (sample_type & PERF_SAMPLE_TRANSACTION)
1126                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1127
1128         if (sample_type & PERF_SAMPLE_READ)
1129                 sample_read__printf(sample, evsel->attr.read_format);
1130 }
1131
1132 static struct machine *machines__find_for_cpumode(struct machines *machines,
1133                                                union perf_event *event,
1134                                                struct perf_sample *sample)
1135 {
1136         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1137         struct machine *machine;
1138
1139         if (perf_guest &&
1140             ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1141              (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1142                 u32 pid;
1143
1144                 if (event->header.type == PERF_RECORD_MMAP
1145                     || event->header.type == PERF_RECORD_MMAP2)
1146                         pid = event->mmap.pid;
1147                 else
1148                         pid = sample->pid;
1149
1150                 machine = machines__find(machines, pid);
1151                 if (!machine)
1152                         machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID);
1153                 return machine;
1154         }
1155
1156         return &machines->host;
1157 }
1158
1159 static int deliver_sample_value(struct perf_evlist *evlist,
1160                                 struct perf_tool *tool,
1161                                 union perf_event *event,
1162                                 struct perf_sample *sample,
1163                                 struct sample_read_value *v,
1164                                 struct machine *machine)
1165 {
1166         struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1167
1168         if (sid) {
1169                 sample->id     = v->id;
1170                 sample->period = v->value - sid->period;
1171                 sid->period    = v->value;
1172         }
1173
1174         if (!sid || sid->evsel == NULL) {
1175                 ++evlist->stats.nr_unknown_id;
1176                 return 0;
1177         }
1178
1179         return tool->sample(tool, event, sample, sid->evsel, machine);
1180 }
1181
1182 static int deliver_sample_group(struct perf_evlist *evlist,
1183                                 struct perf_tool *tool,
1184                                 union  perf_event *event,
1185                                 struct perf_sample *sample,
1186                                 struct machine *machine)
1187 {
1188         int ret = -EINVAL;
1189         u64 i;
1190
1191         for (i = 0; i < sample->read.group.nr; i++) {
1192                 ret = deliver_sample_value(evlist, tool, event, sample,
1193                                            &sample->read.group.values[i],
1194                                            machine);
1195                 if (ret)
1196                         break;
1197         }
1198
1199         return ret;
1200 }
1201
1202 static int
1203  perf_evlist__deliver_sample(struct perf_evlist *evlist,
1204                              struct perf_tool *tool,
1205                              union  perf_event *event,
1206                              struct perf_sample *sample,
1207                              struct perf_evsel *evsel,
1208                              struct machine *machine)
1209 {
1210         /* We know evsel != NULL. */
1211         u64 sample_type = evsel->attr.sample_type;
1212         u64 read_format = evsel->attr.read_format;
1213
1214         /* Standard sample delievery. */
1215         if (!(sample_type & PERF_SAMPLE_READ))
1216                 return tool->sample(tool, event, sample, evsel, machine);
1217
1218         /* For PERF_SAMPLE_READ we have either single or group mode. */
1219         if (read_format & PERF_FORMAT_GROUP)
1220                 return deliver_sample_group(evlist, tool, event, sample,
1221                                             machine);
1222         else
1223                 return deliver_sample_value(evlist, tool, event, sample,
1224                                             &sample->read.one, machine);
1225 }
1226
1227 static int machines__deliver_event(struct machines *machines,
1228                                    struct perf_evlist *evlist,
1229                                    union perf_event *event,
1230                                    struct perf_sample *sample,
1231                                    struct perf_tool *tool, u64 file_offset)
1232 {
1233         struct perf_evsel *evsel;
1234         struct machine *machine;
1235
1236         dump_event(evlist, event, file_offset, sample);
1237
1238         evsel = perf_evlist__id2evsel(evlist, sample->id);
1239
1240         machine = machines__find_for_cpumode(machines, event, sample);
1241
1242         switch (event->header.type) {
1243         case PERF_RECORD_SAMPLE:
1244                 if (evsel == NULL) {
1245                         ++evlist->stats.nr_unknown_id;
1246                         return 0;
1247                 }
1248                 dump_sample(evsel, event, sample);
1249                 if (machine == NULL) {
1250                         ++evlist->stats.nr_unprocessable_samples;
1251                         return 0;
1252                 }
1253                 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1254         case PERF_RECORD_MMAP:
1255                 return tool->mmap(tool, event, sample, machine);
1256         case PERF_RECORD_MMAP2:
1257                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1258                         ++evlist->stats.nr_proc_map_timeout;
1259                 return tool->mmap2(tool, event, sample, machine);
1260         case PERF_RECORD_COMM:
1261                 return tool->comm(tool, event, sample, machine);
1262         case PERF_RECORD_FORK:
1263                 return tool->fork(tool, event, sample, machine);
1264         case PERF_RECORD_EXIT:
1265                 return tool->exit(tool, event, sample, machine);
1266         case PERF_RECORD_LOST:
1267                 if (tool->lost == perf_event__process_lost)
1268                         evlist->stats.total_lost += event->lost.lost;
1269                 return tool->lost(tool, event, sample, machine);
1270         case PERF_RECORD_LOST_SAMPLES:
1271                 if (tool->lost_samples == perf_event__process_lost_samples)
1272                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1273                 return tool->lost_samples(tool, event, sample, machine);
1274         case PERF_RECORD_READ:
1275                 return tool->read(tool, event, sample, evsel, machine);
1276         case PERF_RECORD_THROTTLE:
1277                 return tool->throttle(tool, event, sample, machine);
1278         case PERF_RECORD_UNTHROTTLE:
1279                 return tool->unthrottle(tool, event, sample, machine);
1280         case PERF_RECORD_AUX:
1281                 if (tool->aux == perf_event__process_aux &&
1282                     (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
1283                         evlist->stats.total_aux_lost += 1;
1284                 return tool->aux(tool, event, sample, machine);
1285         case PERF_RECORD_ITRACE_START:
1286                 return tool->itrace_start(tool, event, sample, machine);
1287         case PERF_RECORD_SWITCH:
1288         case PERF_RECORD_SWITCH_CPU_WIDE:
1289                 return tool->context_switch(tool, event, sample, machine);
1290         default:
1291                 ++evlist->stats.nr_unknown_events;
1292                 return -1;
1293         }
1294 }
1295
1296 static int perf_session__deliver_event(struct perf_session *session,
1297                                        union perf_event *event,
1298                                        struct perf_sample *sample,
1299                                        struct perf_tool *tool,
1300                                        u64 file_offset)
1301 {
1302         int ret;
1303
1304         ret = auxtrace__process_event(session, event, sample, tool);
1305         if (ret < 0)
1306                 return ret;
1307         if (ret > 0)
1308                 return 0;
1309
1310         return machines__deliver_event(&session->machines, session->evlist,
1311                                        event, sample, tool, file_offset);
1312 }
1313
1314 static s64 perf_session__process_user_event(struct perf_session *session,
1315                                             union perf_event *event,
1316                                             u64 file_offset)
1317 {
1318         struct ordered_events *oe = &session->ordered_events;
1319         struct perf_tool *tool = session->tool;
1320         int fd = perf_data_file__fd(session->file);
1321         int err;
1322
1323         dump_event(session->evlist, event, file_offset, NULL);
1324
1325         /* These events are processed right away */
1326         switch (event->header.type) {
1327         case PERF_RECORD_HEADER_ATTR:
1328                 err = tool->attr(tool, event, &session->evlist);
1329                 if (err == 0) {
1330                         perf_session__set_id_hdr_size(session);
1331                         perf_session__set_comm_exec(session);
1332                 }
1333                 return err;
1334         case PERF_RECORD_EVENT_UPDATE:
1335                 return tool->event_update(tool, event, &session->evlist);
1336         case PERF_RECORD_HEADER_EVENT_TYPE:
1337                 /*
1338                  * Depreceated, but we need to handle it for sake
1339                  * of old data files create in pipe mode.
1340                  */
1341                 return 0;
1342         case PERF_RECORD_HEADER_TRACING_DATA:
1343                 /* setup for reading amidst mmap */
1344                 lseek(fd, file_offset, SEEK_SET);
1345                 return tool->tracing_data(tool, event, session);
1346         case PERF_RECORD_HEADER_BUILD_ID:
1347                 return tool->build_id(tool, event, session);
1348         case PERF_RECORD_FINISHED_ROUND:
1349                 return tool->finished_round(tool, event, oe);
1350         case PERF_RECORD_ID_INDEX:
1351                 return tool->id_index(tool, event, session);
1352         case PERF_RECORD_AUXTRACE_INFO:
1353                 return tool->auxtrace_info(tool, event, session);
1354         case PERF_RECORD_AUXTRACE:
1355                 /* setup for reading amidst mmap */
1356                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1357                 return tool->auxtrace(tool, event, session);
1358         case PERF_RECORD_AUXTRACE_ERROR:
1359                 perf_session__auxtrace_error_inc(session, event);
1360                 return tool->auxtrace_error(tool, event, session);
1361         case PERF_RECORD_THREAD_MAP:
1362                 return tool->thread_map(tool, event, session);
1363         case PERF_RECORD_CPU_MAP:
1364                 return tool->cpu_map(tool, event, session);
1365         case PERF_RECORD_STAT_CONFIG:
1366                 return tool->stat_config(tool, event, session);
1367         case PERF_RECORD_STAT:
1368                 return tool->stat(tool, event, session);
1369         case PERF_RECORD_STAT_ROUND:
1370                 return tool->stat_round(tool, event, session);
1371         default:
1372                 return -EINVAL;
1373         }
1374 }
1375
1376 int perf_session__deliver_synth_event(struct perf_session *session,
1377                                       union perf_event *event,
1378                                       struct perf_sample *sample)
1379 {
1380         struct perf_evlist *evlist = session->evlist;
1381         struct perf_tool *tool = session->tool;
1382
1383         events_stats__inc(&evlist->stats, event->header.type);
1384
1385         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1386                 return perf_session__process_user_event(session, event, 0);
1387
1388         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1389 }
1390
1391 static void event_swap(union perf_event *event, bool sample_id_all)
1392 {
1393         perf_event__swap_op swap;
1394
1395         swap = perf_event__swap_ops[event->header.type];
1396         if (swap)
1397                 swap(event, sample_id_all);
1398 }
1399
1400 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1401                              void *buf, size_t buf_sz,
1402                              union perf_event **event_ptr,
1403                              struct perf_sample *sample)
1404 {
1405         union perf_event *event;
1406         size_t hdr_sz, rest;
1407         int fd;
1408
1409         if (session->one_mmap && !session->header.needs_swap) {
1410                 event = file_offset - session->one_mmap_offset +
1411                         session->one_mmap_addr;
1412                 goto out_parse_sample;
1413         }
1414
1415         if (perf_data_file__is_pipe(session->file))
1416                 return -1;
1417
1418         fd = perf_data_file__fd(session->file);
1419         hdr_sz = sizeof(struct perf_event_header);
1420
1421         if (buf_sz < hdr_sz)
1422                 return -1;
1423
1424         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1425             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1426                 return -1;
1427
1428         event = (union perf_event *)buf;
1429
1430         if (session->header.needs_swap)
1431                 perf_event_header__bswap(&event->header);
1432
1433         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1434                 return -1;
1435
1436         rest = event->header.size - hdr_sz;
1437
1438         if (readn(fd, buf, rest) != (ssize_t)rest)
1439                 return -1;
1440
1441         if (session->header.needs_swap)
1442                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1443
1444 out_parse_sample:
1445
1446         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1447             perf_evlist__parse_sample(session->evlist, event, sample))
1448                 return -1;
1449
1450         *event_ptr = event;
1451
1452         return 0;
1453 }
1454
1455 static s64 perf_session__process_event(struct perf_session *session,
1456                                        union perf_event *event, u64 file_offset)
1457 {
1458         struct perf_evlist *evlist = session->evlist;
1459         struct perf_tool *tool = session->tool;
1460         struct perf_sample sample;
1461         int ret;
1462
1463         if (session->header.needs_swap)
1464                 event_swap(event, perf_evlist__sample_id_all(evlist));
1465
1466         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1467                 return -EINVAL;
1468
1469         events_stats__inc(&evlist->stats, event->header.type);
1470
1471         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1472                 return perf_session__process_user_event(session, event, file_offset);
1473
1474         /*
1475          * For all kernel events we get the sample data
1476          */
1477         ret = perf_evlist__parse_sample(evlist, event, &sample);
1478         if (ret)
1479                 return ret;
1480
1481         if (tool->ordered_events) {
1482                 ret = perf_session__queue_event(session, event, &sample, file_offset);
1483                 if (ret != -ETIME)
1484                         return ret;
1485         }
1486
1487         return perf_session__deliver_event(session, event, &sample, tool,
1488                                            file_offset);
1489 }
1490
1491 void perf_event_header__bswap(struct perf_event_header *hdr)
1492 {
1493         hdr->type = bswap_32(hdr->type);
1494         hdr->misc = bswap_16(hdr->misc);
1495         hdr->size = bswap_16(hdr->size);
1496 }
1497
1498 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1499 {
1500         return machine__findnew_thread(&session->machines.host, -1, pid);
1501 }
1502
1503 int perf_session__register_idle_thread(struct perf_session *session)
1504 {
1505         struct thread *thread;
1506         int err = 0;
1507
1508         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1509         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1510                 pr_err("problem inserting idle task.\n");
1511                 err = -1;
1512         }
1513
1514         /* machine__findnew_thread() got the thread, so put it */
1515         thread__put(thread);
1516         return err;
1517 }
1518
1519 static void perf_session__warn_about_errors(const struct perf_session *session)
1520 {
1521         const struct events_stats *stats = &session->evlist->stats;
1522         const struct ordered_events *oe = &session->ordered_events;
1523
1524         if (session->tool->lost == perf_event__process_lost &&
1525             stats->nr_events[PERF_RECORD_LOST] != 0) {
1526                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1527                             "Check IO/CPU overload!\n\n",
1528                             stats->nr_events[0],
1529                             stats->nr_events[PERF_RECORD_LOST]);
1530         }
1531
1532         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1533                 double drop_rate;
1534
1535                 drop_rate = (double)stats->total_lost_samples /
1536                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1537                 if (drop_rate > 0.05) {
1538                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1539                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1540                                     drop_rate * 100.0);
1541                 }
1542         }
1543
1544         if (session->tool->aux == perf_event__process_aux &&
1545             stats->total_aux_lost != 0) {
1546                 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1547                             stats->total_aux_lost,
1548                             stats->nr_events[PERF_RECORD_AUX]);
1549         }
1550
1551         if (stats->nr_unknown_events != 0) {
1552                 ui__warning("Found %u unknown events!\n\n"
1553                             "Is this an older tool processing a perf.data "
1554                             "file generated by a more recent tool?\n\n"
1555                             "If that is not the case, consider "
1556                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1557                             stats->nr_unknown_events);
1558         }
1559
1560         if (stats->nr_unknown_id != 0) {
1561                 ui__warning("%u samples with id not present in the header\n",
1562                             stats->nr_unknown_id);
1563         }
1564
1565         if (stats->nr_invalid_chains != 0) {
1566                 ui__warning("Found invalid callchains!\n\n"
1567                             "%u out of %u events were discarded for this reason.\n\n"
1568                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1569                             stats->nr_invalid_chains,
1570                             stats->nr_events[PERF_RECORD_SAMPLE]);
1571         }
1572
1573         if (stats->nr_unprocessable_samples != 0) {
1574                 ui__warning("%u unprocessable samples recorded.\n"
1575                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1576                             stats->nr_unprocessable_samples);
1577         }
1578
1579         if (oe->nr_unordered_events != 0)
1580                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1581
1582         events_stats__auxtrace_error_warn(stats);
1583
1584         if (stats->nr_proc_map_timeout != 0) {
1585                 ui__warning("%d map information files for pre-existing threads were\n"
1586                             "not processed, if there are samples for addresses they\n"
1587                             "will not be resolved, you may find out which are these\n"
1588                             "threads by running with -v and redirecting the output\n"
1589                             "to a file.\n"
1590                             "The time limit to process proc map is too short?\n"
1591                             "Increase it by --proc-map-timeout\n",
1592                             stats->nr_proc_map_timeout);
1593         }
1594 }
1595
1596 static int perf_session__flush_thread_stack(struct thread *thread,
1597                                             void *p __maybe_unused)
1598 {
1599         return thread_stack__flush(thread);
1600 }
1601
1602 static int perf_session__flush_thread_stacks(struct perf_session *session)
1603 {
1604         return machines__for_each_thread(&session->machines,
1605                                          perf_session__flush_thread_stack,
1606                                          NULL);
1607 }
1608
1609 volatile int session_done;
1610
1611 static int __perf_session__process_pipe_events(struct perf_session *session)
1612 {
1613         struct ordered_events *oe = &session->ordered_events;
1614         struct perf_tool *tool = session->tool;
1615         int fd = perf_data_file__fd(session->file);
1616         union perf_event *event;
1617         uint32_t size, cur_size = 0;
1618         void *buf = NULL;
1619         s64 skip = 0;
1620         u64 head;
1621         ssize_t err;
1622         void *p;
1623
1624         perf_tool__fill_defaults(tool);
1625
1626         head = 0;
1627         cur_size = sizeof(union perf_event);
1628
1629         buf = malloc(cur_size);
1630         if (!buf)
1631                 return -errno;
1632 more:
1633         event = buf;
1634         err = readn(fd, event, sizeof(struct perf_event_header));
1635         if (err <= 0) {
1636                 if (err == 0)
1637                         goto done;
1638
1639                 pr_err("failed to read event header\n");
1640                 goto out_err;
1641         }
1642
1643         if (session->header.needs_swap)
1644                 perf_event_header__bswap(&event->header);
1645
1646         size = event->header.size;
1647         if (size < sizeof(struct perf_event_header)) {
1648                 pr_err("bad event header size\n");
1649                 goto out_err;
1650         }
1651
1652         if (size > cur_size) {
1653                 void *new = realloc(buf, size);
1654                 if (!new) {
1655                         pr_err("failed to allocate memory to read event\n");
1656                         goto out_err;
1657                 }
1658                 buf = new;
1659                 cur_size = size;
1660                 event = buf;
1661         }
1662         p = event;
1663         p += sizeof(struct perf_event_header);
1664
1665         if (size - sizeof(struct perf_event_header)) {
1666                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1667                 if (err <= 0) {
1668                         if (err == 0) {
1669                                 pr_err("unexpected end of event stream\n");
1670                                 goto done;
1671                         }
1672
1673                         pr_err("failed to read event data\n");
1674                         goto out_err;
1675                 }
1676         }
1677
1678         if ((skip = perf_session__process_event(session, event, head)) < 0) {
1679                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1680                        head, event->header.size, event->header.type);
1681                 err = -EINVAL;
1682                 goto out_err;
1683         }
1684
1685         head += size;
1686
1687         if (skip > 0)
1688                 head += skip;
1689
1690         if (!session_done())
1691                 goto more;
1692 done:
1693         /* do the final flush for ordered samples */
1694         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1695         if (err)
1696                 goto out_err;
1697         err = auxtrace__flush_events(session, tool);
1698         if (err)
1699                 goto out_err;
1700         err = perf_session__flush_thread_stacks(session);
1701 out_err:
1702         free(buf);
1703         perf_session__warn_about_errors(session);
1704         ordered_events__free(&session->ordered_events);
1705         auxtrace__free_events(session);
1706         return err;
1707 }
1708
1709 static union perf_event *
1710 fetch_mmaped_event(struct perf_session *session,
1711                    u64 head, size_t mmap_size, char *buf)
1712 {
1713         union perf_event *event;
1714
1715         /*
1716          * Ensure we have enough space remaining to read
1717          * the size of the event in the headers.
1718          */
1719         if (head + sizeof(event->header) > mmap_size)
1720                 return NULL;
1721
1722         event = (union perf_event *)(buf + head);
1723
1724         if (session->header.needs_swap)
1725                 perf_event_header__bswap(&event->header);
1726
1727         if (head + event->header.size > mmap_size) {
1728                 /* We're not fetching the event so swap back again */
1729                 if (session->header.needs_swap)
1730                         perf_event_header__bswap(&event->header);
1731                 return NULL;
1732         }
1733
1734         return event;
1735 }
1736
1737 /*
1738  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1739  * slices. On 32bit we use 32MB.
1740  */
1741 #if BITS_PER_LONG == 64
1742 #define MMAP_SIZE ULLONG_MAX
1743 #define NUM_MMAPS 1
1744 #else
1745 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1746 #define NUM_MMAPS 128
1747 #endif
1748
1749 static int __perf_session__process_events(struct perf_session *session,
1750                                           u64 data_offset, u64 data_size,
1751                                           u64 file_size)
1752 {
1753         struct ordered_events *oe = &session->ordered_events;
1754         struct perf_tool *tool = session->tool;
1755         int fd = perf_data_file__fd(session->file);
1756         u64 head, page_offset, file_offset, file_pos, size;
1757         int err, mmap_prot, mmap_flags, map_idx = 0;
1758         size_t  mmap_size;
1759         char *buf, *mmaps[NUM_MMAPS];
1760         union perf_event *event;
1761         struct ui_progress prog;
1762         s64 skip;
1763
1764         perf_tool__fill_defaults(tool);
1765
1766         page_offset = page_size * (data_offset / page_size);
1767         file_offset = page_offset;
1768         head = data_offset - page_offset;
1769
1770         if (data_size == 0)
1771                 goto out;
1772
1773         if (data_offset + data_size < file_size)
1774                 file_size = data_offset + data_size;
1775
1776         ui_progress__init(&prog, file_size, "Processing events...");
1777
1778         mmap_size = MMAP_SIZE;
1779         if (mmap_size > file_size) {
1780                 mmap_size = file_size;
1781                 session->one_mmap = true;
1782         }
1783
1784         memset(mmaps, 0, sizeof(mmaps));
1785
1786         mmap_prot  = PROT_READ;
1787         mmap_flags = MAP_SHARED;
1788
1789         if (session->header.needs_swap) {
1790                 mmap_prot  |= PROT_WRITE;
1791                 mmap_flags = MAP_PRIVATE;
1792         }
1793 remap:
1794         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1795                    file_offset);
1796         if (buf == MAP_FAILED) {
1797                 pr_err("failed to mmap file\n");
1798                 err = -errno;
1799                 goto out_err;
1800         }
1801         mmaps[map_idx] = buf;
1802         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1803         file_pos = file_offset + head;
1804         if (session->one_mmap) {
1805                 session->one_mmap_addr = buf;
1806                 session->one_mmap_offset = file_offset;
1807         }
1808
1809 more:
1810         event = fetch_mmaped_event(session, head, mmap_size, buf);
1811         if (!event) {
1812                 if (mmaps[map_idx]) {
1813                         munmap(mmaps[map_idx], mmap_size);
1814                         mmaps[map_idx] = NULL;
1815                 }
1816
1817                 page_offset = page_size * (head / page_size);
1818                 file_offset += page_offset;
1819                 head -= page_offset;
1820                 goto remap;
1821         }
1822
1823         size = event->header.size;
1824
1825         if (size < sizeof(struct perf_event_header) ||
1826             (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1827                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1828                        file_offset + head, event->header.size,
1829                        event->header.type);
1830                 err = -EINVAL;
1831                 goto out_err;
1832         }
1833
1834         if (skip)
1835                 size += skip;
1836
1837         head += size;
1838         file_pos += size;
1839
1840         ui_progress__update(&prog, size);
1841
1842         if (session_done())
1843                 goto out;
1844
1845         if (file_pos < file_size)
1846                 goto more;
1847
1848 out:
1849         /* do the final flush for ordered samples */
1850         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1851         if (err)
1852                 goto out_err;
1853         err = auxtrace__flush_events(session, tool);
1854         if (err)
1855                 goto out_err;
1856         err = perf_session__flush_thread_stacks(session);
1857 out_err:
1858         ui_progress__finish();
1859         perf_session__warn_about_errors(session);
1860         ordered_events__free(&session->ordered_events);
1861         auxtrace__free_events(session);
1862         session->one_mmap = false;
1863         return err;
1864 }
1865
1866 int perf_session__process_events(struct perf_session *session)
1867 {
1868         u64 size = perf_data_file__size(session->file);
1869         int err;
1870
1871         if (perf_session__register_idle_thread(session) < 0)
1872                 return -ENOMEM;
1873
1874         if (!perf_data_file__is_pipe(session->file))
1875                 err = __perf_session__process_events(session,
1876                                                      session->header.data_offset,
1877                                                      session->header.data_size, size);
1878         else
1879                 err = __perf_session__process_pipe_events(session);
1880
1881         return err;
1882 }
1883
1884 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1885 {
1886         struct perf_evsel *evsel;
1887
1888         evlist__for_each(session->evlist, evsel) {
1889                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1890                         return true;
1891         }
1892
1893         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1894         return false;
1895 }
1896
1897 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1898                                      const char *symbol_name, u64 addr)
1899 {
1900         char *bracket;
1901         enum map_type i;
1902         struct ref_reloc_sym *ref;
1903
1904         ref = zalloc(sizeof(struct ref_reloc_sym));
1905         if (ref == NULL)
1906                 return -ENOMEM;
1907
1908         ref->name = strdup(symbol_name);
1909         if (ref->name == NULL) {
1910                 free(ref);
1911                 return -ENOMEM;
1912         }
1913
1914         bracket = strchr(ref->name, ']');
1915         if (bracket)
1916                 *bracket = '\0';
1917
1918         ref->addr = addr;
1919
1920         for (i = 0; i < MAP__NR_TYPES; ++i) {
1921                 struct kmap *kmap = map__kmap(maps[i]);
1922
1923                 if (!kmap)
1924                         continue;
1925                 kmap->ref_reloc_sym = ref;
1926         }
1927
1928         return 0;
1929 }
1930
1931 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1932 {
1933         return machines__fprintf_dsos(&session->machines, fp);
1934 }
1935
1936 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1937                                           bool (skip)(struct dso *dso, int parm), int parm)
1938 {
1939         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1940 }
1941
1942 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1943 {
1944         size_t ret;
1945         const char *msg = "";
1946
1947         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1948                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1949
1950         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1951
1952         ret += events_stats__fprintf(&session->evlist->stats, fp);
1953         return ret;
1954 }
1955
1956 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1957 {
1958         /*
1959          * FIXME: Here we have to actually print all the machines in this
1960          * session, not just the host...
1961          */
1962         return machine__fprintf(&session->machines.host, fp);
1963 }
1964
1965 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1966                                               unsigned int type)
1967 {
1968         struct perf_evsel *pos;
1969
1970         evlist__for_each(session->evlist, pos) {
1971                 if (pos->attr.type == type)
1972                         return pos;
1973         }
1974         return NULL;
1975 }
1976
1977 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1978                           struct addr_location *al,
1979                           unsigned int print_opts, unsigned int stack_depth)
1980 {
1981         struct callchain_cursor_node *node;
1982         int print_ip = print_opts & PRINT_IP_OPT_IP;
1983         int print_sym = print_opts & PRINT_IP_OPT_SYM;
1984         int print_dso = print_opts & PRINT_IP_OPT_DSO;
1985         int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1986         int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1987         int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1988         char s = print_oneline ? ' ' : '\t';
1989
1990         if (symbol_conf.use_callchain && sample->callchain) {
1991                 struct addr_location node_al;
1992
1993                 if (thread__resolve_callchain(al->thread, evsel,
1994                                               sample, NULL, NULL,
1995                                               stack_depth) != 0) {
1996                         if (verbose)
1997                                 error("Failed to resolve callchain. Skipping\n");
1998                         return;
1999                 }
2000                 callchain_cursor_commit(&callchain_cursor);
2001
2002                 if (print_symoffset)
2003                         node_al = *al;
2004
2005                 while (stack_depth) {
2006                         u64 addr = 0;
2007
2008                         node = callchain_cursor_current(&callchain_cursor);
2009                         if (!node)
2010                                 break;
2011
2012                         if (node->sym && node->sym->ignore)
2013                                 goto next;
2014
2015                         if (print_ip)
2016                                 printf("%c%16" PRIx64, s, node->ip);
2017
2018                         if (node->map)
2019                                 addr = node->map->map_ip(node->map, node->ip);
2020
2021                         if (print_sym) {
2022                                 printf(" ");
2023                                 if (print_symoffset) {
2024                                         node_al.addr = addr;
2025                                         node_al.map  = node->map;
2026                                         symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
2027                                 } else
2028                                         symbol__fprintf_symname(node->sym, stdout);
2029                         }
2030
2031                         if (print_dso) {
2032                                 printf(" (");
2033                                 map__fprintf_dsoname(node->map, stdout);
2034                                 printf(")");
2035                         }
2036
2037                         if (print_srcline)
2038                                 map__fprintf_srcline(node->map, addr, "\n  ",
2039                                                      stdout);
2040
2041                         if (!print_oneline)
2042                                 printf("\n");
2043
2044                         stack_depth--;
2045 next:
2046                         callchain_cursor_advance(&callchain_cursor);
2047                 }
2048
2049         } else {
2050                 if (al->sym && al->sym->ignore)
2051                         return;
2052
2053                 if (print_ip)
2054                         printf("%16" PRIx64, sample->ip);
2055
2056                 if (print_sym) {
2057                         printf(" ");
2058                         if (print_symoffset)
2059                                 symbol__fprintf_symname_offs(al->sym, al,
2060                                                              stdout);
2061                         else
2062                                 symbol__fprintf_symname(al->sym, stdout);
2063                 }
2064
2065                 if (print_dso) {
2066                         printf(" (");
2067                         map__fprintf_dsoname(al->map, stdout);
2068                         printf(")");
2069                 }
2070
2071                 if (print_srcline)
2072                         map__fprintf_srcline(al->map, al->addr, "\n  ", stdout);
2073         }
2074 }
2075
2076 int perf_session__cpu_bitmap(struct perf_session *session,
2077                              const char *cpu_list, unsigned long *cpu_bitmap)
2078 {
2079         int i, err = -1;
2080         struct cpu_map *map;
2081
2082         for (i = 0; i < PERF_TYPE_MAX; ++i) {
2083                 struct perf_evsel *evsel;
2084
2085                 evsel = perf_session__find_first_evtype(session, i);
2086                 if (!evsel)
2087                         continue;
2088
2089                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2090                         pr_err("File does not contain CPU events. "
2091                                "Remove -c option to proceed.\n");
2092                         return -1;
2093                 }
2094         }
2095
2096         map = cpu_map__new(cpu_list);
2097         if (map == NULL) {
2098                 pr_err("Invalid cpu_list\n");
2099                 return -1;
2100         }
2101
2102         for (i = 0; i < map->nr; i++) {
2103                 int cpu = map->map[i];
2104
2105                 if (cpu >= MAX_NR_CPUS) {
2106                         pr_err("Requested CPU %d too large. "
2107                                "Consider raising MAX_NR_CPUS\n", cpu);
2108                         goto out_delete_map;
2109                 }
2110
2111                 set_bit(cpu, cpu_bitmap);
2112         }
2113
2114         err = 0;
2115
2116 out_delete_map:
2117         cpu_map__put(map);
2118         return err;
2119 }
2120
2121 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2122                                 bool full)
2123 {
2124         struct stat st;
2125         int fd, ret;
2126
2127         if (session == NULL || fp == NULL)
2128                 return;
2129
2130         fd = perf_data_file__fd(session->file);
2131
2132         ret = fstat(fd, &st);
2133         if (ret == -1)
2134                 return;
2135
2136         fprintf(fp, "# ========\n");
2137         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2138         perf_header__fprintf_info(session, fp, full);
2139         fprintf(fp, "# ========\n#\n");
2140 }
2141
2142
2143 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2144                                              const struct perf_evsel_str_handler *assocs,
2145                                              size_t nr_assocs)
2146 {
2147         struct perf_evsel *evsel;
2148         size_t i;
2149         int err;
2150
2151         for (i = 0; i < nr_assocs; i++) {
2152                 /*
2153                  * Adding a handler for an event not in the session,
2154                  * just ignore it.
2155                  */
2156                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2157                 if (evsel == NULL)
2158                         continue;
2159
2160                 err = -EEXIST;
2161                 if (evsel->handler != NULL)
2162                         goto out;
2163                 evsel->handler = assocs[i].handler;
2164         }
2165
2166         err = 0;
2167 out:
2168         return err;
2169 }
2170
2171 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2172                                  union perf_event *event,
2173                                  struct perf_session *session)
2174 {
2175         struct perf_evlist *evlist = session->evlist;
2176         struct id_index_event *ie = &event->id_index;
2177         size_t i, nr, max_nr;
2178
2179         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2180                  sizeof(struct id_index_entry);
2181         nr = ie->nr;
2182         if (nr > max_nr)
2183                 return -EINVAL;
2184
2185         if (dump_trace)
2186                 fprintf(stdout, " nr: %zu\n", nr);
2187
2188         for (i = 0; i < nr; i++) {
2189                 struct id_index_entry *e = &ie->entries[i];
2190                 struct perf_sample_id *sid;
2191
2192                 if (dump_trace) {
2193                         fprintf(stdout, " ... id: %"PRIu64, e->id);
2194                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
2195                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
2196                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
2197                 }
2198
2199                 sid = perf_evlist__id2sid(evlist, e->id);
2200                 if (!sid)
2201                         return -ENOENT;
2202                 sid->idx = e->idx;
2203                 sid->cpu = e->cpu;
2204                 sid->tid = e->tid;
2205         }
2206         return 0;
2207 }
2208
2209 int perf_event__synthesize_id_index(struct perf_tool *tool,
2210                                     perf_event__handler_t process,
2211                                     struct perf_evlist *evlist,
2212                                     struct machine *machine)
2213 {
2214         union perf_event *ev;
2215         struct perf_evsel *evsel;
2216         size_t nr = 0, i = 0, sz, max_nr, n;
2217         int err;
2218
2219         pr_debug2("Synthesizing id index\n");
2220
2221         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2222                  sizeof(struct id_index_entry);
2223
2224         evlist__for_each(evlist, evsel)
2225                 nr += evsel->ids;
2226
2227         n = nr > max_nr ? max_nr : nr;
2228         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2229         ev = zalloc(sz);
2230         if (!ev)
2231                 return -ENOMEM;
2232
2233         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2234         ev->id_index.header.size = sz;
2235         ev->id_index.nr = n;
2236
2237         evlist__for_each(evlist, evsel) {
2238                 u32 j;
2239
2240                 for (j = 0; j < evsel->ids; j++) {
2241                         struct id_index_entry *e;
2242                         struct perf_sample_id *sid;
2243
2244                         if (i >= n) {
2245                                 err = process(tool, ev, NULL, machine);
2246                                 if (err)
2247                                         goto out_err;
2248                                 nr -= n;
2249                                 i = 0;
2250                         }
2251
2252                         e = &ev->id_index.entries[i++];
2253
2254                         e->id = evsel->id[j];
2255
2256                         sid = perf_evlist__id2sid(evlist, e->id);
2257                         if (!sid) {
2258                                 free(ev);
2259                                 return -ENOENT;
2260                         }
2261
2262                         e->idx = sid->idx;
2263                         e->cpu = sid->cpu;
2264                         e->tid = sid->tid;
2265                 }
2266         }
2267
2268         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2269         ev->id_index.header.size = sz;
2270         ev->id_index.nr = nr;
2271
2272         err = process(tool, ev, NULL, machine);
2273 out_err:
2274         free(ev);
2275
2276         return err;
2277 }