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_finished_round_stub(struct perf_tool *tool __maybe_unused,
 244                                        union perf_event *event __maybe_unused,
 245                                        struct ordered_events *oe __maybe_unused)
 246 {
 247         dump_printf(": unhandled!\n");
 248         return 0;
 249 }
 250
 251 static int process_finished_round(struct perf_tool *tool,
 252                                   union perf_event *event,
 253                                   struct ordered_events *oe);
 254
 255 static int skipn(int fd, off_t n)
 256 {
 257         char buf[4096];
 258         ssize_t ret;
 259
 260         while (n > 0) {
 261                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 262                 if (ret <= 0)
 263                         return ret;
 264                 n -= ret;
 265         }
 266
 267         return 0;
 268 }
 269
 270 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
 271                                        union perf_event *event,
 272                                        struct perf_session *session
 273                                        __maybe_unused)
 274 {
 275         dump_printf(": unhandled!\n");
 276         if (perf_data_file__is_pipe(session->file))
 277                 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
 278         return event->auxtrace.size;
 279 }
 280
 281 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused,
 282                                   union perf_event *event __maybe_unused,
 283                                   struct perf_session *session __maybe_unused)
 284 {
 285         dump_printf(": unhandled!\n");
 286         return 0;
 287 }
 288
 289
 290 static
 291 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
 292                                   union perf_event *event __maybe_unused,
 293                                   struct perf_session *session __maybe_unused)
 294 {
 295         if (dump_trace)
 296                 perf_event__fprintf_thread_map(event, stdout);
 297
 298         dump_printf(": unhandled!\n");
 299         return 0;
 300 }
 301
 302 static
 303 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
 304                                union perf_event *event __maybe_unused,
 305                                struct perf_session *session __maybe_unused)
 306 {
 307         if (dump_trace)
 308                 perf_event__fprintf_cpu_map(event, stdout);
 309
 310         dump_printf(": unhandled!\n");
 311         return 0;
 312 }
 313
 314 static
 315 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
 316                                    union perf_event *event __maybe_unused,
 317                                    struct perf_session *session __maybe_unused)
 318 {
 319         if (dump_trace)
 320                 perf_event__fprintf_stat_config(event, stdout);
 321
 322         dump_printf(": unhandled!\n");
 323         return 0;
 324 }
 325
 326 static int process_stat_stub(struct perf_tool *tool __maybe_unused,
 327                              union perf_event *event __maybe_unused,
 328                              struct perf_session *perf_session
 329                              __maybe_unused)
 330 {
 331         if (dump_trace)
 332                 perf_event__fprintf_stat(event, stdout);
 333
 334         dump_printf(": unhandled!\n");
 335         return 0;
 336 }
 337
 338 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
 339                                    union perf_event *event __maybe_unused,
 340                                    struct perf_session *perf_session
 341                                    __maybe_unused)
 342 {
 343         if (dump_trace)
 344                 perf_event__fprintf_stat_round(event, stdout);
 345
 346         dump_printf(": unhandled!\n");
 347         return 0;
 348 }
 349
 350 void perf_tool__fill_defaults(struct perf_tool *tool)
 351 {
 352         if (tool->sample == NULL)
 353                 tool->sample = process_event_sample_stub;
 354         if (tool->mmap == NULL)
 355                 tool->mmap = process_event_stub;
 356         if (tool->mmap2 == NULL)
 357                 tool->mmap2 = process_event_stub;
 358         if (tool->comm == NULL)
 359                 tool->comm = process_event_stub;
 360         if (tool->fork == NULL)
 361                 tool->fork = process_event_stub;
 362         if (tool->exit == NULL)
 363                 tool->exit = process_event_stub;
 364         if (tool->lost == NULL)
 365                 tool->lost = perf_event__process_lost;
 366         if (tool->lost_samples == NULL)
 367                 tool->lost_samples = perf_event__process_lost_samples;
 368         if (tool->aux == NULL)
 369                 tool->aux = perf_event__process_aux;
 370         if (tool->itrace_start == NULL)
 371                 tool->itrace_start = perf_event__process_itrace_start;
 372         if (tool->context_switch == NULL)
 373                 tool->context_switch = perf_event__process_switch;
 374         if (tool->read == NULL)
 375                 tool->read = process_event_sample_stub;
 376         if (tool->throttle == NULL)
 377                 tool->throttle = process_event_stub;
 378         if (tool->unthrottle == NULL)
 379                 tool->unthrottle = process_event_stub;
 380         if (tool->attr == NULL)
 381                 tool->attr = process_event_synth_attr_stub;
 382         if (tool->event_update == NULL)
 383                 tool->event_update = process_event_synth_event_update_stub;
 384         if (tool->tracing_data == NULL)
 385                 tool->tracing_data = process_event_synth_tracing_data_stub;
 386         if (tool->build_id == NULL)
 387                 tool->build_id = process_event_op2_stub;
 388         if (tool->finished_round == NULL) {
 389                 if (tool->ordered_events)
 390                         tool->finished_round = process_finished_round;
 391                 else
 392                         tool->finished_round = process_finished_round_stub;
 393         }
 394         if (tool->id_index == NULL)
 395                 tool->id_index = process_event_op2_stub;
 396         if (tool->auxtrace_info == NULL)
 397                 tool->auxtrace_info = process_event_op2_stub;
 398         if (tool->auxtrace == NULL)
 399                 tool->auxtrace = process_event_auxtrace_stub;
 400         if (tool->auxtrace_error == NULL)
 401                 tool->auxtrace_error = process_event_op2_stub;
 402         if (tool->thread_map == NULL)
 403                 tool->thread_map = process_event_thread_map_stub;
 404         if (tool->cpu_map == NULL)
 405                 tool->cpu_map = process_event_cpu_map_stub;
 406         if (tool->stat_config == NULL)
 407                 tool->stat_config = process_event_stat_config_stub;
 408         if (tool->stat == NULL)
 409                 tool->stat = process_stat_stub;
 410         if (tool->stat_round == NULL)
 411                 tool->stat_round = process_stat_round_stub;
 412         if (tool->time_conv == NULL)
 413                 tool->time_conv = process_event_op2_stub;
 414 }
 415
 416 static void swap_sample_id_all(union perf_event *event, void *data)
 417 {
 418         void *end = (void *) event + event->header.size;
 419         int size = end - data;
 420
 421         BUG_ON(size % sizeof(u64));
 422         mem_bswap_64(data, size);
 423 }
 424
 425 static void perf_event__all64_swap(union perf_event *event,
 426                                    bool sample_id_all __maybe_unused)
 427 {
 428         struct perf_event_header *hdr = &event->header;
 429         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 430 }
 431
 432 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 433 {
 434         event->comm.pid = bswap_32(event->comm.pid);
 435         event->comm.tid = bswap_32(event->comm.tid);
 436
 437         if (sample_id_all) {
 438                 void *data = &event->comm.comm;
 439
 440                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 441                 swap_sample_id_all(event, data);
 442         }
 443 }
 444
 445 static void perf_event__mmap_swap(union perf_event *event,
 446                                   bool sample_id_all)
 447 {
 448         event->mmap.pid   = bswap_32(event->mmap.pid);
 449         event->mmap.tid   = bswap_32(event->mmap.tid);
 450         event->mmap.start = bswap_64(event->mmap.start);
 451         event->mmap.len   = bswap_64(event->mmap.len);
 452         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 453
 454         if (sample_id_all) {
 455                 void *data = &event->mmap.filename;
 456
 457                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 458                 swap_sample_id_all(event, data);
 459         }
 460 }
 461
 462 static void perf_event__mmap2_swap(union perf_event *event,
 463                                   bool sample_id_all)
 464 {
 465         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 466         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 467         event->mmap2.start = bswap_64(event->mmap2.start);
 468         event->mmap2.len   = bswap_64(event->mmap2.len);
 469         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 470         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 471         event->mmap2.min   = bswap_32(event->mmap2.min);
 472         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 473
 474         if (sample_id_all) {
 475                 void *data = &event->mmap2.filename;
 476
 477                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 478                 swap_sample_id_all(event, data);
 479         }
 480 }
 481 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 482 {
 483         event->fork.pid  = bswap_32(event->fork.pid);
 484         event->fork.tid  = bswap_32(event->fork.tid);
 485         event->fork.ppid = bswap_32(event->fork.ppid);
 486         event->fork.ptid = bswap_32(event->fork.ptid);
 487         event->fork.time = bswap_64(event->fork.time);
 488
 489         if (sample_id_all)
 490                 swap_sample_id_all(event, &event->fork + 1);
 491 }
 492
 493 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 494 {
 495         event->read.pid          = bswap_32(event->read.pid);
 496         event->read.tid          = bswap_32(event->read.tid);
 497         event->read.value        = bswap_64(event->read.value);
 498         event->read.time_enabled = bswap_64(event->read.time_enabled);
 499         event->read.time_running = bswap_64(event->read.time_running);
 500         event->read.id           = bswap_64(event->read.id);
 501
 502         if (sample_id_all)
 503                 swap_sample_id_all(event, &event->read + 1);
 504 }
 505
 506 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 507 {
 508         event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 509         event->aux.aux_size   = bswap_64(event->aux.aux_size);
 510         event->aux.flags      = bswap_64(event->aux.flags);
 511
 512         if (sample_id_all)
 513                 swap_sample_id_all(event, &event->aux + 1);
 514 }
 515
 516 static void perf_event__itrace_start_swap(union perf_event *event,
 517                                           bool sample_id_all)
 518 {
 519         event->itrace_start.pid  = bswap_32(event->itrace_start.pid);
 520         event->itrace_start.tid  = bswap_32(event->itrace_start.tid);
 521
 522         if (sample_id_all)
 523                 swap_sample_id_all(event, &event->itrace_start + 1);
 524 }
 525
 526 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 527 {
 528         if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 529                 event->context_switch.next_prev_pid =
 530                                 bswap_32(event->context_switch.next_prev_pid);
 531                 event->context_switch.next_prev_tid =
 532                                 bswap_32(event->context_switch.next_prev_tid);
 533         }
 534
 535         if (sample_id_all)
 536                 swap_sample_id_all(event, &event->context_switch + 1);
 537 }
 538
 539 static void perf_event__throttle_swap(union perf_event *event,
 540                                       bool sample_id_all)
 541 {
 542         event->throttle.time      = bswap_64(event->throttle.time);
 543         event->throttle.id        = bswap_64(event->throttle.id);
 544         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 545
 546         if (sample_id_all)
 547                 swap_sample_id_all(event, &event->throttle + 1);
 548 }
 549
 550 static u8 revbyte(u8 b)
 551 {
 552         int rev = (b >> 4) | ((b & 0xf) << 4);
 553         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 554         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 555         return (u8) rev;
 556 }
 557
 558 /*
 559  * XXX this is hack in attempt to carry flags bitfield
 560  * through endian village. ABI says:
 561  *
 562  * Bit-fields are allocated from right to left (least to most significant)
 563  * on little-endian implementations and from left to right (most to least
 564  * significant) on big-endian implementations.
 565  *
 566  * The above seems to be byte specific, so we need to reverse each
 567  * byte of the bitfield. 'Internet' also says this might be implementation
 568  * specific and we probably need proper fix and carry perf_event_attr
 569  * bitfield flags in separate data file FEAT_ section. Thought this seems
 570  * to work for now.
 571  */
 572 static void swap_bitfield(u8 *p, unsigned len)
 573 {
 574         unsigned i;
 575
 576         for (i = 0; i < len; i++) {
 577                 *p = revbyte(*p);
 578                 p++;
 579         }
 580 }
 581
 582 /* exported for swapping attributes in file header */
 583 void perf_event__attr_swap(struct perf_event_attr *attr)
 584 {
 585         attr->type              = bswap_32(attr->type);
 586         attr->size              = bswap_32(attr->size);
 587
 588 #define bswap_safe(f, n)                                        \
 589         (attr->size > (offsetof(struct perf_event_attr, f) +    \
 590                        sizeof(attr->f) * (n)))
 591 #define bswap_field(f, sz)                      \
 592 do {                                            \
 593         if (bswap_safe(f, 0))                   \
 594                 attr->f = bswap_##sz(attr->f);  \
 595 } while(0)
 596 #define bswap_field_32(f) bswap_field(f, 32)
 597 #define bswap_field_64(f) bswap_field(f, 64)
 598
 599         bswap_field_64(config);
 600         bswap_field_64(sample_period);
 601         bswap_field_64(sample_type);
 602         bswap_field_64(read_format);
 603         bswap_field_32(wakeup_events);
 604         bswap_field_32(bp_type);
 605         bswap_field_64(bp_addr);
 606         bswap_field_64(bp_len);
 607         bswap_field_64(branch_sample_type);
 608         bswap_field_64(sample_regs_user);
 609         bswap_field_32(sample_stack_user);
 610         bswap_field_32(aux_watermark);
 611
 612         /*
 613          * After read_format are bitfields. Check read_format because
 614          * we are unable to use offsetof on bitfield.
 615          */
 616         if (bswap_safe(read_format, 1))
 617                 swap_bitfield((u8 *) (&attr->read_format + 1),
 618                               sizeof(u64));
 619 #undef bswap_field_64
 620 #undef bswap_field_32
 621 #undef bswap_field
 622 #undef bswap_safe
 623 }
 624
 625 static void perf_event__hdr_attr_swap(union perf_event *event,
 626                                       bool sample_id_all __maybe_unused)
 627 {
 628         size_t size;
 629
 630         perf_event__attr_swap(&event->attr.attr);
 631
 632         size = event->header.size;
 633         size -= (void *)&event->attr.id - (void *)event;
 634         mem_bswap_64(event->attr.id, size);
 635 }
 636
 637 static void perf_event__event_update_swap(union perf_event *event,
 638                                           bool sample_id_all __maybe_unused)
 639 {
 640         event->event_update.type = bswap_64(event->event_update.type);
 641         event->event_update.id   = bswap_64(event->event_update.id);
 642 }
 643
 644 static void perf_event__event_type_swap(union perf_event *event,
 645                                         bool sample_id_all __maybe_unused)
 646 {
 647         event->event_type.event_type.event_id =
 648                 bswap_64(event->event_type.event_type.event_id);
 649 }
 650
 651 static void perf_event__tracing_data_swap(union perf_event *event,
 652                                           bool sample_id_all __maybe_unused)
 653 {
 654         event->tracing_data.size = bswap_32(event->tracing_data.size);
 655 }
 656
 657 static void perf_event__auxtrace_info_swap(union perf_event *event,
 658                                            bool sample_id_all __maybe_unused)
 659 {
 660         size_t size;
 661
 662         event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 663
 664         size = event->header.size;
 665         size -= (void *)&event->auxtrace_info.priv - (void *)event;
 666         mem_bswap_64(event->auxtrace_info.priv, size);
 667 }
 668
 669 static void perf_event__auxtrace_swap(union perf_event *event,
 670                                       bool sample_id_all __maybe_unused)
 671 {
 672         event->auxtrace.size      = bswap_64(event->auxtrace.size);
 673         event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 674         event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 675         event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 676         event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 677         event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 678 }
 679
 680 static void perf_event__auxtrace_error_swap(union perf_event *event,
 681                                             bool sample_id_all __maybe_unused)
 682 {
 683         event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 684         event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 685         event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 686         event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 687         event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 688         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 689 }
 690
 691 static void perf_event__thread_map_swap(union perf_event *event,
 692                                         bool sample_id_all __maybe_unused)
 693 {
 694         unsigned i;
 695
 696         event->thread_map.nr = bswap_64(event->thread_map.nr);
 697
 698         for (i = 0; i < event->thread_map.nr; i++)
 699                 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
 700 }
 701
 702 static void perf_event__cpu_map_swap(union perf_event *event,
 703                                      bool sample_id_all __maybe_unused)
 704 {
 705         struct cpu_map_data *data = &event->cpu_map.data;
 706         struct cpu_map_entries *cpus;
 707         struct cpu_map_mask *mask;
 708         unsigned i;
 709
 710         data->type = bswap_64(data->type);
 711
 712         switch (data->type) {
 713         case PERF_CPU_MAP__CPUS:
 714                 cpus = (struct cpu_map_entries *)data->data;
 715
 716                 cpus->nr = bswap_16(cpus->nr);
 717
 718                 for (i = 0; i < cpus->nr; i++)
 719                         cpus->cpu[i] = bswap_16(cpus->cpu[i]);
 720                 break;
 721         case PERF_CPU_MAP__MASK:
 722                 mask = (struct cpu_map_mask *) data->data;
 723
 724                 mask->nr = bswap_16(mask->nr);
 725                 mask->long_size = bswap_16(mask->long_size);
 726
 727                 switch (mask->long_size) {
 728                 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
 729                 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
 730                 default:
 731                         pr_err("cpu_map swap: unsupported long size\n");
 732                 }
 733         default:
 734                 break;
 735         }
 736 }
 737
 738 static void perf_event__stat_config_swap(union perf_event *event,
 739                                          bool sample_id_all __maybe_unused)
 740 {
 741         u64 size;
 742
 743         size  = event->stat_config.nr * sizeof(event->stat_config.data[0]);
 744         size += 1; /* nr item itself */
 745         mem_bswap_64(&event->stat_config.nr, size);
 746 }
 747
 748 static void perf_event__stat_swap(union perf_event *event,
 749                                   bool sample_id_all __maybe_unused)
 750 {
 751         event->stat.id     = bswap_64(event->stat.id);
 752         event->stat.thread = bswap_32(event->stat.thread);
 753         event->stat.cpu    = bswap_32(event->stat.cpu);
 754         event->stat.val    = bswap_64(event->stat.val);
 755         event->stat.ena    = bswap_64(event->stat.ena);
 756         event->stat.run    = bswap_64(event->stat.run);
 757 }
 758
 759 static void perf_event__stat_round_swap(union perf_event *event,
 760                                         bool sample_id_all __maybe_unused)
 761 {
 762         event->stat_round.type = bswap_64(event->stat_round.type);
 763         event->stat_round.time = bswap_64(event->stat_round.time);
 764 }
 765
 766 typedef void (*perf_event__swap_op)(union perf_event *event,
 767                                     bool sample_id_all);
 768
 769 static perf_event__swap_op perf_event__swap_ops[] = {
 770         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 771         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 772         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 773         [PERF_RECORD_FORK]                = perf_event__task_swap,
 774         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 775         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 776         [PERF_RECORD_READ]                = perf_event__read_swap,
 777         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 778         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 779         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 780         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
 781         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
 782         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
 783         [PERF_RECORD_SWITCH]              = perf_event__switch_swap,
 784         [PERF_RECORD_SWITCH_CPU_WIDE]     = perf_event__switch_swap,
 785         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 786         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 787         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 788         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 789         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
 790         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
 791         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
 792         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
 793         [PERF_RECORD_THREAD_MAP]          = perf_event__thread_map_swap,
 794         [PERF_RECORD_CPU_MAP]             = perf_event__cpu_map_swap,
 795         [PERF_RECORD_STAT_CONFIG]         = perf_event__stat_config_swap,
 796         [PERF_RECORD_STAT]                = perf_event__stat_swap,
 797         [PERF_RECORD_STAT_ROUND]          = perf_event__stat_round_swap,
 798         [PERF_RECORD_EVENT_UPDATE]        = perf_event__event_update_swap,
 799         [PERF_RECORD_TIME_CONV]           = perf_event__all64_swap,
 800         [PERF_RECORD_HEADER_MAX]          = NULL,
 801 };
 802
 803 /*
 804  * When perf record finishes a pass on every buffers, it records this pseudo
 805  * event.
 806  * We record the max timestamp t found in the pass n.
 807  * Assuming these timestamps are monotonic across cpus, we know that if
 808  * a buffer still has events with timestamps below t, they will be all
 809  * available and then read in the pass n + 1.
 810  * Hence when we start to read the pass n + 2, we can safely flush every
 811  * events with timestamps below t.
 812  *
 813  *    ============ PASS n =================
 814  *       CPU 0         |   CPU 1
 815  *                     |
 816  *    cnt1 timestamps  |   cnt2 timestamps
 817  *          1          |         2
 818  *          2          |         3
 819  *          -          |         4  <--- max recorded
 820  *
 821  *    ============ PASS n + 1 ==============
 822  *       CPU 0         |   CPU 1
 823  *                     |
 824  *    cnt1 timestamps  |   cnt2 timestamps
 825  *          3          |         5
 826  *          4          |         6
 827  *          5          |         7 <---- max recorded
 828  *
 829  *      Flush every events below timestamp 4
 830  *
 831  *    ============ PASS n + 2 ==============
 832  *       CPU 0         |   CPU 1
 833  *                     |
 834  *    cnt1 timestamps  |   cnt2 timestamps
 835  *          6          |         8
 836  *          7          |         9
 837  *          -          |         10
 838  *
 839  *      Flush every events below timestamp 7
 840  *      etc...
 841  */
 842 static int process_finished_round(struct perf_tool *tool __maybe_unused,
 843                                   union perf_event *event __maybe_unused,
 844                                   struct ordered_events *oe)
 845 {
 846         if (dump_trace)
 847                 fprintf(stdout, "\n");
 848         return ordered_events__flush(oe, OE_FLUSH__ROUND);
 849 }
 850
 851 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
 852                               struct perf_sample *sample, u64 file_offset)
 853 {
 854         return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
 855 }
 856
 857 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 858 {
 859         struct ip_callchain *callchain = sample->callchain;
 860         struct branch_stack *lbr_stack = sample->branch_stack;
 861         u64 kernel_callchain_nr = callchain->nr;
 862         unsigned int i;
 863
 864         for (i = 0; i < kernel_callchain_nr; i++) {
 865                 if (callchain->ips[i] == PERF_CONTEXT_USER)
 866                         break;
 867         }
 868
 869         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 870                 u64 total_nr;
 871                 /*
 872                  * LBR callstack can only get user call chain,
 873                  * i is kernel call chain number,
 874                  * 1 is PERF_CONTEXT_USER.
 875                  *
 876                  * The user call chain is stored in LBR registers.
 877                  * LBR are pair registers. The caller is stored
 878                  * in "from" register, while the callee is stored
 879                  * in "to" register.
 880                  * For example, there is a call stack
 881                  * "A"->"B"->"C"->"D".
 882                  * The LBR registers will recorde like
 883                  * "C"->"D", "B"->"C", "A"->"B".
 884                  * So only the first "to" register and all "from"
 885                  * registers are needed to construct the whole stack.
 886                  */
 887                 total_nr = i + 1 + lbr_stack->nr + 1;
 888                 kernel_callchain_nr = i + 1;
 889
 890                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 891
 892                 for (i = 0; i < kernel_callchain_nr; i++)
 893                         printf("..... %2d: %016" PRIx64 "\n",
 894                                i, callchain->ips[i]);
 895
 896                 printf("..... %2d: %016" PRIx64 "\n",
 897                        (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 898                 for (i = 0; i < lbr_stack->nr; i++)
 899                         printf("..... %2d: %016" PRIx64 "\n",
 900                                (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 901         }
 902 }
 903
 904 static void callchain__printf(struct perf_evsel *evsel,
 905                               struct perf_sample *sample)
 906 {
 907         unsigned int i;
 908         struct ip_callchain *callchain = sample->callchain;
 909
 910         if (perf_evsel__has_branch_callstack(evsel))
 911                 callchain__lbr_callstack_printf(sample);
 912
 913         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 914
 915         for (i = 0; i < callchain->nr; i++)
 916                 printf("..... %2d: %016" PRIx64 "\n",
 917                        i, callchain->ips[i]);
 918 }
 919
 920 static void branch_stack__printf(struct perf_sample *sample)
 921 {
 922         uint64_t i;
 923
 924         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 925
 926         for (i = 0; i < sample->branch_stack->nr; i++) {
 927                 struct branch_entry *e = &sample->branch_stack->entries[i];
 928
 929                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
 930                         i, e->from, e->to,
 931                         e->flags.cycles,
 932                         e->flags.mispred ? "M" : " ",
 933                         e->flags.predicted ? "P" : " ",
 934                         e->flags.abort ? "A" : " ",
 935                         e->flags.in_tx ? "T" : " ",
 936                         (unsigned)e->flags.reserved);
 937         }
 938 }
 939
 940 static void regs_dump__printf(u64 mask, u64 *regs)
 941 {
 942         unsigned rid, i = 0;
 943
 944         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 945                 u64 val = regs[i++];
 946
 947                 printf(".... %-5s 0x%" PRIx64 "\n",
 948                        perf_reg_name(rid), val);
 949         }
 950 }
 951
 952 static const char *regs_abi[] = {
 953         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
 954         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 955         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 956 };
 957
 958 static inline const char *regs_dump_abi(struct regs_dump *d)
 959 {
 960         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 961                 return "unknown";
 962
 963         return regs_abi[d->abi];
 964 }
 965
 966 static void regs__printf(const char *type, struct regs_dump *regs)
 967 {
 968         u64 mask = regs->mask;
 969
 970         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 971                type,
 972                mask,
 973                regs_dump_abi(regs));
 974
 975         regs_dump__printf(mask, regs->regs);
 976 }
 977
 978 static void regs_user__printf(struct perf_sample *sample)
 979 {
 980         struct regs_dump *user_regs = &sample->user_regs;
 981
 982         if (user_regs->regs)
 983                 regs__printf("user", user_regs);
 984 }
 985
 986 static void regs_intr__printf(struct perf_sample *sample)
 987 {
 988         struct regs_dump *intr_regs = &sample->intr_regs;
 989
 990         if (intr_regs->regs)
 991                 regs__printf("intr", intr_regs);
 992 }
 993
 994 static void stack_user__printf(struct stack_dump *dump)
 995 {
 996         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
 997                dump->size, dump->offset);
 998 }
 999
1000 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1001                                        union perf_event *event,
1002                                        struct perf_sample *sample)
1003 {
1004         u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1005
1006         if (event->header.type != PERF_RECORD_SAMPLE &&
1007             !perf_evlist__sample_id_all(evlist)) {
1008                 fputs("-1 -1 ", stdout);
1009                 return;
1010         }
1011
1012         if ((sample_type & PERF_SAMPLE_CPU))
1013                 printf("%u ", sample->cpu);
1014
1015         if (sample_type & PERF_SAMPLE_TIME)
1016                 printf("%" PRIu64 " ", sample->time);
1017 }
1018
1019 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1020 {
1021         printf("... sample_read:\n");
1022
1023         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1024                 printf("...... time enabled %016" PRIx64 "\n",
1025                        sample->read.time_enabled);
1026
1027         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1028                 printf("...... time running %016" PRIx64 "\n",
1029                        sample->read.time_running);
1030
1031         if (read_format & PERF_FORMAT_GROUP) {
1032                 u64 i;
1033
1034                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1035
1036                 for (i = 0; i < sample->read.group.nr; i++) {
1037                         struct sample_read_value *value;
1038
1039                         value = &sample->read.group.values[i];
1040                         printf("..... id %016" PRIx64
1041                                ", value %016" PRIx64 "\n",
1042                                value->id, value->value);
1043                 }
1044         } else
1045                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1046                         sample->read.one.id, sample->read.one.value);
1047 }
1048
1049 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1050                        u64 file_offset, struct perf_sample *sample)
1051 {
1052         if (!dump_trace)
1053                 return;
1054
1055         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1056                file_offset, event->header.size, event->header.type);
1057
1058         trace_event(event);
1059
1060         if (sample)
1061                 perf_evlist__print_tstamp(evlist, event, sample);
1062
1063         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1064                event->header.size, perf_event__name(event->header.type));
1065 }
1066
1067 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1068                         struct perf_sample *sample)
1069 {
1070         u64 sample_type;
1071
1072         if (!dump_trace)
1073                 return;
1074
1075         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1076                event->header.misc, sample->pid, sample->tid, sample->ip,
1077                sample->period, sample->addr);
1078
1079         sample_type = evsel->attr.sample_type;
1080
1081         if (sample_type & PERF_SAMPLE_CALLCHAIN)
1082                 callchain__printf(evsel, sample);
1083
1084         if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel))
1085                 branch_stack__printf(sample);
1086
1087         if (sample_type & PERF_SAMPLE_REGS_USER)
1088                 regs_user__printf(sample);
1089
1090         if (sample_type & PERF_SAMPLE_REGS_INTR)
1091                 regs_intr__printf(sample);
1092
1093         if (sample_type & PERF_SAMPLE_STACK_USER)
1094                 stack_user__printf(&sample->user_stack);
1095
1096         if (sample_type & PERF_SAMPLE_WEIGHT)
1097                 printf("... weight: %" PRIu64 "\n", sample->weight);
1098
1099         if (sample_type & PERF_SAMPLE_DATA_SRC)
1100                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1101
1102         if (sample_type & PERF_SAMPLE_TRANSACTION)
1103                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1104
1105         if (sample_type & PERF_SAMPLE_READ)
1106                 sample_read__printf(sample, evsel->attr.read_format);
1107 }
1108
1109 static struct machine *machines__find_for_cpumode(struct machines *machines,
1110                                                union perf_event *event,
1111                                                struct perf_sample *sample)
1112 {
1113         struct machine *machine;
1114
1115         if (perf_guest &&
1116             ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1117              (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1118                 u32 pid;
1119
1120                 if (event->header.type == PERF_RECORD_MMAP
1121                     || event->header.type == PERF_RECORD_MMAP2)
1122                         pid = event->mmap.pid;
1123                 else
1124                         pid = sample->pid;
1125
1126                 machine = machines__find(machines, pid);
1127                 if (!machine)
1128                         machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1129                 return machine;
1130         }
1131
1132         return &machines->host;
1133 }
1134
1135 static int deliver_sample_value(struct perf_evlist *evlist,
1136                                 struct perf_tool *tool,
1137                                 union perf_event *event,
1138                                 struct perf_sample *sample,
1139                                 struct sample_read_value *v,
1140                                 struct machine *machine)
1141 {
1142         struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1143
1144         if (sid) {
1145                 sample->id     = v->id;
1146                 sample->period = v->value - sid->period;
1147                 sid->period    = v->value;
1148         }
1149
1150         if (!sid || sid->evsel == NULL) {
1151                 ++evlist->stats.nr_unknown_id;
1152                 return 0;
1153         }
1154
1155         return tool->sample(tool, event, sample, sid->evsel, machine);
1156 }
1157
1158 static int deliver_sample_group(struct perf_evlist *evlist,
1159                                 struct perf_tool *tool,
1160                                 union  perf_event *event,
1161                                 struct perf_sample *sample,
1162                                 struct machine *machine)
1163 {
1164         int ret = -EINVAL;
1165         u64 i;
1166
1167         for (i = 0; i < sample->read.group.nr; i++) {
1168                 ret = deliver_sample_value(evlist, tool, event, sample,
1169                                            &sample->read.group.values[i],
1170                                            machine);
1171                 if (ret)
1172                         break;
1173         }
1174
1175         return ret;
1176 }
1177
1178 static int
1179  perf_evlist__deliver_sample(struct perf_evlist *evlist,
1180                              struct perf_tool *tool,
1181                              union  perf_event *event,
1182                              struct perf_sample *sample,
1183                              struct perf_evsel *evsel,
1184                              struct machine *machine)
1185 {
1186         /* We know evsel != NULL. */
1187         u64 sample_type = evsel->attr.sample_type;
1188         u64 read_format = evsel->attr.read_format;
1189
1190         /* Standard sample delievery. */
1191         if (!(sample_type & PERF_SAMPLE_READ))
1192                 return tool->sample(tool, event, sample, evsel, machine);
1193
1194         /* For PERF_SAMPLE_READ we have either single or group mode. */
1195         if (read_format & PERF_FORMAT_GROUP)
1196                 return deliver_sample_group(evlist, tool, event, sample,
1197                                             machine);
1198         else
1199                 return deliver_sample_value(evlist, tool, event, sample,
1200                                             &sample->read.one, machine);
1201 }
1202
1203 static int machines__deliver_event(struct machines *machines,
1204                                    struct perf_evlist *evlist,
1205                                    union perf_event *event,
1206                                    struct perf_sample *sample,
1207                                    struct perf_tool *tool, u64 file_offset)
1208 {
1209         struct perf_evsel *evsel;
1210         struct machine *machine;
1211
1212         dump_event(evlist, event, file_offset, sample);
1213
1214         evsel = perf_evlist__id2evsel(evlist, sample->id);
1215
1216         machine = machines__find_for_cpumode(machines, event, sample);
1217
1218         switch (event->header.type) {
1219         case PERF_RECORD_SAMPLE:
1220                 if (evsel == NULL) {
1221                         ++evlist->stats.nr_unknown_id;
1222                         return 0;
1223                 }
1224                 dump_sample(evsel, event, sample);
1225                 if (machine == NULL) {
1226                         ++evlist->stats.nr_unprocessable_samples;
1227                         return 0;
1228                 }
1229                 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1230         case PERF_RECORD_MMAP:
1231                 return tool->mmap(tool, event, sample, machine);
1232         case PERF_RECORD_MMAP2:
1233                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1234                         ++evlist->stats.nr_proc_map_timeout;
1235                 return tool->mmap2(tool, event, sample, machine);
1236         case PERF_RECORD_COMM:
1237                 return tool->comm(tool, event, sample, machine);
1238         case PERF_RECORD_FORK:
1239                 return tool->fork(tool, event, sample, machine);
1240         case PERF_RECORD_EXIT:
1241                 return tool->exit(tool, event, sample, machine);
1242         case PERF_RECORD_LOST:
1243                 if (tool->lost == perf_event__process_lost)
1244                         evlist->stats.total_lost += event->lost.lost;
1245                 return tool->lost(tool, event, sample, machine);
1246         case PERF_RECORD_LOST_SAMPLES:
1247                 if (tool->lost_samples == perf_event__process_lost_samples)
1248                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1249                 return tool->lost_samples(tool, event, sample, machine);
1250         case PERF_RECORD_READ:
1251                 return tool->read(tool, event, sample, evsel, machine);
1252         case PERF_RECORD_THROTTLE:
1253                 return tool->throttle(tool, event, sample, machine);
1254         case PERF_RECORD_UNTHROTTLE:
1255                 return tool->unthrottle(tool, event, sample, machine);
1256         case PERF_RECORD_AUX:
1257                 if (tool->aux == perf_event__process_aux &&
1258                     (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
1259                         evlist->stats.total_aux_lost += 1;
1260                 return tool->aux(tool, event, sample, machine);
1261         case PERF_RECORD_ITRACE_START:
1262                 return tool->itrace_start(tool, event, sample, machine);
1263         case PERF_RECORD_SWITCH:
1264         case PERF_RECORD_SWITCH_CPU_WIDE:
1265                 return tool->context_switch(tool, event, sample, machine);
1266         default:
1267                 ++evlist->stats.nr_unknown_events;
1268                 return -1;
1269         }
1270 }
1271
1272 static int perf_session__deliver_event(struct perf_session *session,
1273                                        union perf_event *event,
1274                                        struct perf_sample *sample,
1275                                        struct perf_tool *tool,
1276                                        u64 file_offset)
1277 {
1278         int ret;
1279
1280         ret = auxtrace__process_event(session, event, sample, tool);
1281         if (ret < 0)
1282                 return ret;
1283         if (ret > 0)
1284                 return 0;
1285
1286         return machines__deliver_event(&session->machines, session->evlist,
1287                                        event, sample, tool, file_offset);
1288 }
1289
1290 static s64 perf_session__process_user_event(struct perf_session *session,
1291                                             union perf_event *event,
1292                                             u64 file_offset)
1293 {
1294         struct ordered_events *oe = &session->ordered_events;
1295         struct perf_tool *tool = session->tool;
1296         int fd = perf_data_file__fd(session->file);
1297         int err;
1298
1299         dump_event(session->evlist, event, file_offset, NULL);
1300
1301         /* These events are processed right away */
1302         switch (event->header.type) {
1303         case PERF_RECORD_HEADER_ATTR:
1304                 err = tool->attr(tool, event, &session->evlist);
1305                 if (err == 0) {
1306                         perf_session__set_id_hdr_size(session);
1307                         perf_session__set_comm_exec(session);
1308                 }
1309                 return err;
1310         case PERF_RECORD_EVENT_UPDATE:
1311                 return tool->event_update(tool, event, &session->evlist);
1312         case PERF_RECORD_HEADER_EVENT_TYPE:
1313                 /*
1314                  * Depreceated, but we need to handle it for sake
1315                  * of old data files create in pipe mode.
1316                  */
1317                 return 0;
1318         case PERF_RECORD_HEADER_TRACING_DATA:
1319                 /* setup for reading amidst mmap */
1320                 lseek(fd, file_offset, SEEK_SET);
1321                 return tool->tracing_data(tool, event, session);
1322         case PERF_RECORD_HEADER_BUILD_ID:
1323                 return tool->build_id(tool, event, session);
1324         case PERF_RECORD_FINISHED_ROUND:
1325                 return tool->finished_round(tool, event, oe);
1326         case PERF_RECORD_ID_INDEX:
1327                 return tool->id_index(tool, event, session);
1328         case PERF_RECORD_AUXTRACE_INFO:
1329                 return tool->auxtrace_info(tool, event, session);
1330         case PERF_RECORD_AUXTRACE:
1331                 /* setup for reading amidst mmap */
1332                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1333                 return tool->auxtrace(tool, event, session);
1334         case PERF_RECORD_AUXTRACE_ERROR:
1335                 perf_session__auxtrace_error_inc(session, event);
1336                 return tool->auxtrace_error(tool, event, session);
1337         case PERF_RECORD_THREAD_MAP:
1338                 return tool->thread_map(tool, event, session);
1339         case PERF_RECORD_CPU_MAP:
1340                 return tool->cpu_map(tool, event, session);
1341         case PERF_RECORD_STAT_CONFIG:
1342                 return tool->stat_config(tool, event, session);
1343         case PERF_RECORD_STAT:
1344                 return tool->stat(tool, event, session);
1345         case PERF_RECORD_STAT_ROUND:
1346                 return tool->stat_round(tool, event, session);
1347         case PERF_RECORD_TIME_CONV:
1348                 session->time_conv = event->time_conv;
1349                 return tool->time_conv(tool, event, session);
1350         default:
1351                 return -EINVAL;
1352         }
1353 }
1354
1355 int perf_session__deliver_synth_event(struct perf_session *session,
1356                                       union perf_event *event,
1357                                       struct perf_sample *sample)
1358 {
1359         struct perf_evlist *evlist = session->evlist;
1360         struct perf_tool *tool = session->tool;
1361
1362         events_stats__inc(&evlist->stats, event->header.type);
1363
1364         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1365                 return perf_session__process_user_event(session, event, 0);
1366
1367         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1368 }
1369
1370 static void event_swap(union perf_event *event, bool sample_id_all)
1371 {
1372         perf_event__swap_op swap;
1373
1374         swap = perf_event__swap_ops[event->header.type];
1375         if (swap)
1376                 swap(event, sample_id_all);
1377 }
1378
1379 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1380                              void *buf, size_t buf_sz,
1381                              union perf_event **event_ptr,
1382                              struct perf_sample *sample)
1383 {
1384         union perf_event *event;
1385         size_t hdr_sz, rest;
1386         int fd;
1387
1388         if (session->one_mmap && !session->header.needs_swap) {
1389                 event = file_offset - session->one_mmap_offset +
1390                         session->one_mmap_addr;
1391                 goto out_parse_sample;
1392         }
1393
1394         if (perf_data_file__is_pipe(session->file))
1395                 return -1;
1396
1397         fd = perf_data_file__fd(session->file);
1398         hdr_sz = sizeof(struct perf_event_header);
1399
1400         if (buf_sz < hdr_sz)
1401                 return -1;
1402
1403         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1404             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1405                 return -1;
1406
1407         event = (union perf_event *)buf;
1408
1409         if (session->header.needs_swap)
1410                 perf_event_header__bswap(&event->header);
1411
1412         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1413                 return -1;
1414
1415         rest = event->header.size - hdr_sz;
1416
1417         if (readn(fd, buf, rest) != (ssize_t)rest)
1418                 return -1;
1419
1420         if (session->header.needs_swap)
1421                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1422
1423 out_parse_sample:
1424
1425         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1426             perf_evlist__parse_sample(session->evlist, event, sample))
1427                 return -1;
1428
1429         *event_ptr = event;
1430
1431         return 0;
1432 }
1433
1434 static s64 perf_session__process_event(struct perf_session *session,
1435                                        union perf_event *event, u64 file_offset)
1436 {
1437         struct perf_evlist *evlist = session->evlist;
1438         struct perf_tool *tool = session->tool;
1439         struct perf_sample sample;
1440         int ret;
1441
1442         if (session->header.needs_swap)
1443                 event_swap(event, perf_evlist__sample_id_all(evlist));
1444
1445         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1446                 return -EINVAL;
1447
1448         events_stats__inc(&evlist->stats, event->header.type);
1449
1450         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1451                 return perf_session__process_user_event(session, event, file_offset);
1452
1453         /*
1454          * For all kernel events we get the sample data
1455          */
1456         ret = perf_evlist__parse_sample(evlist, event, &sample);
1457         if (ret)
1458                 return ret;
1459
1460         if (tool->ordered_events) {
1461                 ret = perf_session__queue_event(session, event, &sample, file_offset);
1462                 if (ret != -ETIME)
1463                         return ret;
1464         }
1465
1466         return perf_session__deliver_event(session, event, &sample, tool,
1467                                            file_offset);
1468 }
1469
1470 void perf_event_header__bswap(struct perf_event_header *hdr)
1471 {
1472         hdr->type = bswap_32(hdr->type);
1473         hdr->misc = bswap_16(hdr->misc);
1474         hdr->size = bswap_16(hdr->size);
1475 }
1476
1477 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1478 {
1479         return machine__findnew_thread(&session->machines.host, -1, pid);
1480 }
1481
1482 int perf_session__register_idle_thread(struct perf_session *session)
1483 {
1484         struct thread *thread;
1485         int err = 0;
1486
1487         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1488         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1489                 pr_err("problem inserting idle task.\n");
1490                 err = -1;
1491         }
1492
1493         /* machine__findnew_thread() got the thread, so put it */
1494         thread__put(thread);
1495         return err;
1496 }
1497
1498 static void perf_session__warn_about_errors(const struct perf_session *session)
1499 {
1500         const struct events_stats *stats = &session->evlist->stats;
1501         const struct ordered_events *oe = &session->ordered_events;
1502
1503         if (session->tool->lost == perf_event__process_lost &&
1504             stats->nr_events[PERF_RECORD_LOST] != 0) {
1505                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1506                             "Check IO/CPU overload!\n\n",
1507                             stats->nr_events[0],
1508                             stats->nr_events[PERF_RECORD_LOST]);
1509         }
1510
1511         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1512                 double drop_rate;
1513
1514                 drop_rate = (double)stats->total_lost_samples /
1515                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1516                 if (drop_rate > 0.05) {
1517                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1518                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1519                                     drop_rate * 100.0);
1520                 }
1521         }
1522
1523         if (session->tool->aux == perf_event__process_aux &&
1524             stats->total_aux_lost != 0) {
1525                 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1526                             stats->total_aux_lost,
1527                             stats->nr_events[PERF_RECORD_AUX]);
1528         }
1529
1530         if (stats->nr_unknown_events != 0) {
1531                 ui__warning("Found %u unknown events!\n\n"
1532                             "Is this an older tool processing a perf.data "
1533                             "file generated by a more recent tool?\n\n"
1534                             "If that is not the case, consider "
1535                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1536                             stats->nr_unknown_events);
1537         }
1538
1539         if (stats->nr_unknown_id != 0) {
1540                 ui__warning("%u samples with id not present in the header\n",
1541                             stats->nr_unknown_id);
1542         }
1543
1544         if (stats->nr_invalid_chains != 0) {
1545                 ui__warning("Found invalid callchains!\n\n"
1546                             "%u out of %u events were discarded for this reason.\n\n"
1547                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1548                             stats->nr_invalid_chains,
1549                             stats->nr_events[PERF_RECORD_SAMPLE]);
1550         }
1551
1552         if (stats->nr_unprocessable_samples != 0) {
1553                 ui__warning("%u unprocessable samples recorded.\n"
1554                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1555                             stats->nr_unprocessable_samples);
1556         }
1557
1558         if (oe->nr_unordered_events != 0)
1559                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1560
1561         events_stats__auxtrace_error_warn(stats);
1562
1563         if (stats->nr_proc_map_timeout != 0) {
1564                 ui__warning("%d map information files for pre-existing threads were\n"
1565                             "not processed, if there are samples for addresses they\n"
1566                             "will not be resolved, you may find out which are these\n"
1567                             "threads by running with -v and redirecting the output\n"
1568                             "to a file.\n"
1569                             "The time limit to process proc map is too short?\n"
1570                             "Increase it by --proc-map-timeout\n",
1571                             stats->nr_proc_map_timeout);
1572         }
1573 }
1574
1575 static int perf_session__flush_thread_stack(struct thread *thread,
1576                                             void *p __maybe_unused)
1577 {
1578         return thread_stack__flush(thread);
1579 }
1580
1581 static int perf_session__flush_thread_stacks(struct perf_session *session)
1582 {
1583         return machines__for_each_thread(&session->machines,
1584                                          perf_session__flush_thread_stack,
1585                                          NULL);
1586 }
1587
1588 volatile int session_done;
1589
1590 static int __perf_session__process_pipe_events(struct perf_session *session)
1591 {
1592         struct ordered_events *oe = &session->ordered_events;
1593         struct perf_tool *tool = session->tool;
1594         int fd = perf_data_file__fd(session->file);
1595         union perf_event *event;
1596         uint32_t size, cur_size = 0;
1597         void *buf = NULL;
1598         s64 skip = 0;
1599         u64 head;
1600         ssize_t err;
1601         void *p;
1602
1603         perf_tool__fill_defaults(tool);
1604
1605         head = 0;
1606         cur_size = sizeof(union perf_event);
1607
1608         buf = malloc(cur_size);
1609         if (!buf)
1610                 return -errno;
1611 more:
1612         event = buf;
1613         err = readn(fd, event, sizeof(struct perf_event_header));
1614         if (err <= 0) {
1615                 if (err == 0)
1616                         goto done;
1617
1618                 pr_err("failed to read event header\n");
1619                 goto out_err;
1620         }
1621
1622         if (session->header.needs_swap)
1623                 perf_event_header__bswap(&event->header);
1624
1625         size = event->header.size;
1626         if (size < sizeof(struct perf_event_header)) {
1627                 pr_err("bad event header size\n");
1628                 goto out_err;
1629         }
1630
1631         if (size > cur_size) {
1632                 void *new = realloc(buf, size);
1633                 if (!new) {
1634                         pr_err("failed to allocate memory to read event\n");
1635                         goto out_err;
1636                 }
1637                 buf = new;
1638                 cur_size = size;
1639                 event = buf;
1640         }
1641         p = event;
1642         p += sizeof(struct perf_event_header);
1643
1644         if (size - sizeof(struct perf_event_header)) {
1645                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1646                 if (err <= 0) {
1647                         if (err == 0) {
1648                                 pr_err("unexpected end of event stream\n");
1649                                 goto done;
1650                         }
1651
1652                         pr_err("failed to read event data\n");
1653                         goto out_err;
1654                 }
1655         }
1656
1657         if ((skip = perf_session__process_event(session, event, head)) < 0) {
1658                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1659                        head, event->header.size, event->header.type);
1660                 err = -EINVAL;
1661                 goto out_err;
1662         }
1663
1664         head += size;
1665
1666         if (skip > 0)
1667                 head += skip;
1668
1669         if (!session_done())
1670                 goto more;
1671 done:
1672         /* do the final flush for ordered samples */
1673         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1674         if (err)
1675                 goto out_err;
1676         err = auxtrace__flush_events(session, tool);
1677         if (err)
1678                 goto out_err;
1679         err = perf_session__flush_thread_stacks(session);
1680 out_err:
1681         free(buf);
1682         perf_session__warn_about_errors(session);
1683         ordered_events__free(&session->ordered_events);
1684         auxtrace__free_events(session);
1685         return err;
1686 }
1687
1688 static union perf_event *
1689 fetch_mmaped_event(struct perf_session *session,
1690                    u64 head, size_t mmap_size, char *buf)
1691 {
1692         union perf_event *event;
1693
1694         /*
1695          * Ensure we have enough space remaining to read
1696          * the size of the event in the headers.
1697          */
1698         if (head + sizeof(event->header) > mmap_size)
1699                 return NULL;
1700
1701         event = (union perf_event *)(buf + head);
1702
1703         if (session->header.needs_swap)
1704                 perf_event_header__bswap(&event->header);
1705
1706         if (head + event->header.size > mmap_size) {
1707                 /* We're not fetching the event so swap back again */
1708                 if (session->header.needs_swap)
1709                         perf_event_header__bswap(&event->header);
1710                 return NULL;
1711         }
1712
1713         return event;
1714 }
1715
1716 /*
1717  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1718  * slices. On 32bit we use 32MB.
1719  */
1720 #if BITS_PER_LONG == 64
1721 #define MMAP_SIZE ULLONG_MAX
1722 #define NUM_MMAPS 1
1723 #else
1724 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1725 #define NUM_MMAPS 128
1726 #endif
1727
1728 static int __perf_session__process_events(struct perf_session *session,
1729                                           u64 data_offset, u64 data_size,
1730                                           u64 file_size)
1731 {
1732         struct ordered_events *oe = &session->ordered_events;
1733         struct perf_tool *tool = session->tool;
1734         int fd = perf_data_file__fd(session->file);
1735         u64 head, page_offset, file_offset, file_pos, size;
1736         int err, mmap_prot, mmap_flags, map_idx = 0;
1737         size_t  mmap_size;
1738         char *buf, *mmaps[NUM_MMAPS];
1739         union perf_event *event;
1740         struct ui_progress prog;
1741         s64 skip;
1742
1743         perf_tool__fill_defaults(tool);
1744
1745         page_offset = page_size * (data_offset / page_size);
1746         file_offset = page_offset;
1747         head = data_offset - page_offset;
1748
1749         if (data_size == 0)
1750                 goto out;
1751
1752         if (data_offset + data_size < file_size)
1753                 file_size = data_offset + data_size;
1754
1755         ui_progress__init(&prog, file_size, "Processing events...");
1756
1757         mmap_size = MMAP_SIZE;
1758         if (mmap_size > file_size) {
1759                 mmap_size = file_size;
1760                 session->one_mmap = true;
1761         }
1762
1763         memset(mmaps, 0, sizeof(mmaps));
1764
1765         mmap_prot  = PROT_READ;
1766         mmap_flags = MAP_SHARED;
1767
1768         if (session->header.needs_swap) {
1769                 mmap_prot  |= PROT_WRITE;
1770                 mmap_flags = MAP_PRIVATE;
1771         }
1772 remap:
1773         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1774                    file_offset);
1775         if (buf == MAP_FAILED) {
1776                 pr_err("failed to mmap file\n");
1777                 err = -errno;
1778                 goto out_err;
1779         }
1780         mmaps[map_idx] = buf;
1781         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1782         file_pos = file_offset + head;
1783         if (session->one_mmap) {
1784                 session->one_mmap_addr = buf;
1785                 session->one_mmap_offset = file_offset;
1786         }
1787
1788 more:
1789         event = fetch_mmaped_event(session, head, mmap_size, buf);
1790         if (!event) {
1791                 if (mmaps[map_idx]) {
1792                         munmap(mmaps[map_idx], mmap_size);
1793                         mmaps[map_idx] = NULL;
1794                 }
1795
1796                 page_offset = page_size * (head / page_size);
1797                 file_offset += page_offset;
1798                 head -= page_offset;
1799                 goto remap;
1800         }
1801
1802         size = event->header.size;
1803
1804         if (size < sizeof(struct perf_event_header) ||
1805             (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1806                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1807                        file_offset + head, event->header.size,
1808                        event->header.type);
1809                 err = -EINVAL;
1810                 goto out_err;
1811         }
1812
1813         if (skip)
1814                 size += skip;
1815
1816         head += size;
1817         file_pos += size;
1818
1819         ui_progress__update(&prog, size);
1820
1821         if (session_done())
1822                 goto out;
1823
1824         if (file_pos < file_size)
1825                 goto more;
1826
1827 out:
1828         /* do the final flush for ordered samples */
1829         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1830         if (err)
1831                 goto out_err;
1832         err = auxtrace__flush_events(session, tool);
1833         if (err)
1834                 goto out_err;
1835         err = perf_session__flush_thread_stacks(session);
1836 out_err:
1837         ui_progress__finish();
1838         perf_session__warn_about_errors(session);
1839         /*
1840          * We may switching perf.data output, make ordered_events
1841          * reusable.
1842          */
1843         ordered_events__reinit(&session->ordered_events);
1844         auxtrace__free_events(session);
1845         session->one_mmap = false;
1846         return err;
1847 }
1848
1849 int perf_session__process_events(struct perf_session *session)
1850 {
1851         u64 size = perf_data_file__size(session->file);
1852         int err;
1853
1854         if (perf_session__register_idle_thread(session) < 0)
1855                 return -ENOMEM;
1856
1857         if (!perf_data_file__is_pipe(session->file))
1858                 err = __perf_session__process_events(session,
1859                                                      session->header.data_offset,
1860                                                      session->header.data_size, size);
1861         else
1862                 err = __perf_session__process_pipe_events(session);
1863
1864         return err;
1865 }
1866
1867 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1868 {
1869         struct perf_evsel *evsel;
1870
1871         evlist__for_each(session->evlist, evsel) {
1872                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1873                         return true;
1874         }
1875
1876         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1877         return false;
1878 }
1879
1880 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1881                                      const char *symbol_name, u64 addr)
1882 {
1883         char *bracket;
1884         enum map_type i;
1885         struct ref_reloc_sym *ref;
1886
1887         ref = zalloc(sizeof(struct ref_reloc_sym));
1888         if (ref == NULL)
1889                 return -ENOMEM;
1890
1891         ref->name = strdup(symbol_name);
1892         if (ref->name == NULL) {
1893                 free(ref);
1894                 return -ENOMEM;
1895         }
1896
1897         bracket = strchr(ref->name, ']');
1898         if (bracket)
1899                 *bracket = '\0';
1900
1901         ref->addr = addr;
1902
1903         for (i = 0; i < MAP__NR_TYPES; ++i) {
1904                 struct kmap *kmap = map__kmap(maps[i]);
1905
1906                 if (!kmap)
1907                         continue;
1908                 kmap->ref_reloc_sym = ref;
1909         }
1910
1911         return 0;
1912 }
1913
1914 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1915 {
1916         return machines__fprintf_dsos(&session->machines, fp);
1917 }
1918
1919 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1920                                           bool (skip)(struct dso *dso, int parm), int parm)
1921 {
1922         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1923 }
1924
1925 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1926 {
1927         size_t ret;
1928         const char *msg = "";
1929
1930         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1931                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1932
1933         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1934
1935         ret += events_stats__fprintf(&session->evlist->stats, fp);
1936         return ret;
1937 }
1938
1939 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1940 {
1941         /*
1942          * FIXME: Here we have to actually print all the machines in this
1943          * session, not just the host...
1944          */
1945         return machine__fprintf(&session->machines.host, fp);
1946 }
1947
1948 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1949                                               unsigned int type)
1950 {
1951         struct perf_evsel *pos;
1952
1953         evlist__for_each(session->evlist, pos) {
1954                 if (pos->attr.type == type)
1955                         return pos;
1956         }
1957         return NULL;
1958 }
1959
1960 int perf_session__cpu_bitmap(struct perf_session *session,
1961                              const char *cpu_list, unsigned long *cpu_bitmap)
1962 {
1963         int i, err = -1;
1964         struct cpu_map *map;
1965
1966         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1967                 struct perf_evsel *evsel;
1968
1969                 evsel = perf_session__find_first_evtype(session, i);
1970                 if (!evsel)
1971                         continue;
1972
1973                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1974                         pr_err("File does not contain CPU events. "
1975                                "Remove -c option to proceed.\n");
1976                         return -1;
1977                 }
1978         }
1979
1980         map = cpu_map__new(cpu_list);
1981         if (map == NULL) {
1982                 pr_err("Invalid cpu_list\n");
1983                 return -1;
1984         }
1985
1986         for (i = 0; i < map->nr; i++) {
1987                 int cpu = map->map[i];
1988
1989                 if (cpu >= MAX_NR_CPUS) {
1990                         pr_err("Requested CPU %d too large. "
1991                                "Consider raising MAX_NR_CPUS\n", cpu);
1992                         goto out_delete_map;
1993                 }
1994
1995                 set_bit(cpu, cpu_bitmap);
1996         }
1997
1998         err = 0;
1999
2000 out_delete_map:
2001         cpu_map__put(map);
2002         return err;
2003 }
2004
2005 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2006                                 bool full)
2007 {
2008         struct stat st;
2009         int fd, ret;
2010
2011         if (session == NULL || fp == NULL)
2012                 return;
2013
2014         fd = perf_data_file__fd(session->file);
2015
2016         ret = fstat(fd, &st);
2017         if (ret == -1)
2018                 return;
2019
2020         fprintf(fp, "# ========\n");
2021         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2022         perf_header__fprintf_info(session, fp, full);
2023         fprintf(fp, "# ========\n#\n");
2024 }
2025
2026
2027 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2028                                              const struct perf_evsel_str_handler *assocs,
2029                                              size_t nr_assocs)
2030 {
2031         struct perf_evsel *evsel;
2032         size_t i;
2033         int err;
2034
2035         for (i = 0; i < nr_assocs; i++) {
2036                 /*
2037                  * Adding a handler for an event not in the session,
2038                  * just ignore it.
2039                  */
2040                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2041                 if (evsel == NULL)
2042                         continue;
2043
2044                 err = -EEXIST;
2045                 if (evsel->handler != NULL)
2046                         goto out;
2047                 evsel->handler = assocs[i].handler;
2048         }
2049
2050         err = 0;
2051 out:
2052         return err;
2053 }
2054
2055 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2056                                  union perf_event *event,
2057                                  struct perf_session *session)
2058 {
2059         struct perf_evlist *evlist = session->evlist;
2060         struct id_index_event *ie = &event->id_index;
2061         size_t i, nr, max_nr;
2062
2063         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2064                  sizeof(struct id_index_entry);
2065         nr = ie->nr;
2066         if (nr > max_nr)
2067                 return -EINVAL;
2068
2069         if (dump_trace)
2070                 fprintf(stdout, " nr: %zu\n", nr);
2071
2072         for (i = 0; i < nr; i++) {
2073                 struct id_index_entry *e = &ie->entries[i];
2074                 struct perf_sample_id *sid;
2075
2076                 if (dump_trace) {
2077                         fprintf(stdout, " ... id: %"PRIu64, e->id);
2078                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
2079                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
2080                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
2081                 }
2082
2083                 sid = perf_evlist__id2sid(evlist, e->id);
2084                 if (!sid)
2085                         return -ENOENT;
2086                 sid->idx = e->idx;
2087                 sid->cpu = e->cpu;
2088                 sid->tid = e->tid;
2089         }
2090         return 0;
2091 }
2092
2093 int perf_event__synthesize_id_index(struct perf_tool *tool,
2094                                     perf_event__handler_t process,
2095                                     struct perf_evlist *evlist,
2096                                     struct machine *machine)
2097 {
2098         union perf_event *ev;
2099         struct perf_evsel *evsel;
2100         size_t nr = 0, i = 0, sz, max_nr, n;
2101         int err;
2102
2103         pr_debug2("Synthesizing id index\n");
2104
2105         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2106                  sizeof(struct id_index_entry);
2107
2108         evlist__for_each(evlist, evsel)
2109                 nr += evsel->ids;
2110
2111         n = nr > max_nr ? max_nr : nr;
2112         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2113         ev = zalloc(sz);
2114         if (!ev)
2115                 return -ENOMEM;
2116
2117         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2118         ev->id_index.header.size = sz;
2119         ev->id_index.nr = n;
2120
2121         evlist__for_each(evlist, evsel) {
2122                 u32 j;
2123
2124                 for (j = 0; j < evsel->ids; j++) {
2125                         struct id_index_entry *e;
2126                         struct perf_sample_id *sid;
2127
2128                         if (i >= n) {
2129                                 err = process(tool, ev, NULL, machine);
2130                                 if (err)
2131                                         goto out_err;
2132                                 nr -= n;
2133                                 i = 0;
2134                         }
2135
2136                         e = &ev->id_index.entries[i++];
2137
2138                         e->id = evsel->id[j];
2139
2140                         sid = perf_evlist__id2sid(evlist, e->id);
2141                         if (!sid) {
2142                                 free(ev);
2143                                 return -ENOENT;
2144                         }
2145
2146                         e->idx = sid->idx;
2147                         e->cpu = sid->cpu;
2148                         e->tid = sid->tid;
2149                 }
2150         }
2151
2152         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2153         ev->id_index.header.size = sz;
2154         ev->id_index.nr = nr;
2155
2156         err = process(tool, ev, NULL, machine);
2157 out_err:
2158         free(ev);
2159
2160         return err;
2161 }