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_entry(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         if (session == NULL)
 182                 return;
 183         auxtrace__free(session);
 184         auxtrace_index__free(&session->auxtrace_index);
 185         perf_session__destroy_kernel_maps(session);
 186         perf_session__delete_threads(session);
 187         perf_env__exit(&session->header.env);
 188         machines__exit(&session->machines);
 189         if (session->file)
 190                 perf_data_file__close(session->file);
 191         free(session);
 192 }
 193
 194 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 195                                                  __maybe_unused,
 196                                                  union perf_event *event
 197                                                  __maybe_unused,
 198                                                  struct perf_session *session
 199                                                 __maybe_unused)
 200 {
 201         dump_printf(": unhandled!\n");
 202         return 0;
 203 }
 204
 205 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 206                                          union perf_event *event __maybe_unused,
 207                                          struct perf_evlist **pevlist
 208                                          __maybe_unused)
 209 {
 210         dump_printf(": unhandled!\n");
 211         return 0;
 212 }
 213
 214 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
 215                                                  union perf_event *event __maybe_unused,
 216                                                  struct perf_evlist **pevlist
 217                                                  __maybe_unused)
 218 {
 219         if (dump_trace)
 220                 perf_event__fprintf_event_update(event, stdout);
 221
 222         dump_printf(": unhandled!\n");
 223         return 0;
 224 }
 225
 226 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 227                                      union perf_event *event __maybe_unused,
 228                                      struct perf_sample *sample __maybe_unused,
 229                                      struct perf_evsel *evsel __maybe_unused,
 230                                      struct machine *machine __maybe_unused)
 231 {
 232         dump_printf(": unhandled!\n");
 233         return 0;
 234 }
 235
 236 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 237                               union perf_event *event __maybe_unused,
 238                               struct perf_sample *sample __maybe_unused,
 239                               struct machine *machine __maybe_unused)
 240 {
 241         dump_printf(": unhandled!\n");
 242         return 0;
 243 }
 244
 245 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 246                                        union perf_event *event __maybe_unused,
 247                                        struct ordered_events *oe __maybe_unused)
 248 {
 249         dump_printf(": unhandled!\n");
 250         return 0;
 251 }
 252
 253 static int process_finished_round(struct perf_tool *tool,
 254                                   union perf_event *event,
 255                                   struct ordered_events *oe);
 256
 257 static int skipn(int fd, off_t n)
 258 {
 259         char buf[4096];
 260         ssize_t ret;
 261
 262         while (n > 0) {
 263                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 264                 if (ret <= 0)
 265                         return ret;
 266                 n -= ret;
 267         }
 268
 269         return 0;
 270 }
 271
 272 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
 273                                        union perf_event *event,
 274                                        struct perf_session *session
 275                                        __maybe_unused)
 276 {
 277         dump_printf(": unhandled!\n");
 278         if (perf_data_file__is_pipe(session->file))
 279                 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
 280         return event->auxtrace.size;
 281 }
 282
 283 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused,
 284                                   union perf_event *event __maybe_unused,
 285                                   struct perf_session *session __maybe_unused)
 286 {
 287         dump_printf(": unhandled!\n");
 288         return 0;
 289 }
 290
 291
 292 static
 293 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
 294                                   union perf_event *event __maybe_unused,
 295                                   struct perf_session *session __maybe_unused)
 296 {
 297         if (dump_trace)
 298                 perf_event__fprintf_thread_map(event, stdout);
 299
 300         dump_printf(": unhandled!\n");
 301         return 0;
 302 }
 303
 304 static
 305 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
 306                                union perf_event *event __maybe_unused,
 307                                struct perf_session *session __maybe_unused)
 308 {
 309         if (dump_trace)
 310                 perf_event__fprintf_cpu_map(event, stdout);
 311
 312         dump_printf(": unhandled!\n");
 313         return 0;
 314 }
 315
 316 static
 317 int process_event_stat_config_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_stat_config(event, stdout);
 323
 324         dump_printf(": unhandled!\n");
 325         return 0;
 326 }
 327
 328 static int process_stat_stub(struct perf_tool *tool __maybe_unused,
 329                              union perf_event *event __maybe_unused,
 330                              struct perf_session *perf_session
 331                              __maybe_unused)
 332 {
 333         if (dump_trace)
 334                 perf_event__fprintf_stat(event, stdout);
 335
 336         dump_printf(": unhandled!\n");
 337         return 0;
 338 }
 339
 340 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
 341                                    union perf_event *event __maybe_unused,
 342                                    struct perf_session *perf_session
 343                                    __maybe_unused)
 344 {
 345         if (dump_trace)
 346                 perf_event__fprintf_stat_round(event, stdout);
 347
 348         dump_printf(": unhandled!\n");
 349         return 0;
 350 }
 351
 352 void perf_tool__fill_defaults(struct perf_tool *tool)
 353 {
 354         if (tool->sample == NULL)
 355                 tool->sample = process_event_sample_stub;
 356         if (tool->mmap == NULL)
 357                 tool->mmap = process_event_stub;
 358         if (tool->mmap2 == NULL)
 359                 tool->mmap2 = process_event_stub;
 360         if (tool->comm == NULL)
 361                 tool->comm = process_event_stub;
 362         if (tool->fork == NULL)
 363                 tool->fork = process_event_stub;
 364         if (tool->exit == NULL)
 365                 tool->exit = process_event_stub;
 366         if (tool->lost == NULL)
 367                 tool->lost = perf_event__process_lost;
 368         if (tool->lost_samples == NULL)
 369                 tool->lost_samples = perf_event__process_lost_samples;
 370         if (tool->aux == NULL)
 371                 tool->aux = perf_event__process_aux;
 372         if (tool->itrace_start == NULL)
 373                 tool->itrace_start = perf_event__process_itrace_start;
 374         if (tool->context_switch == NULL)
 375                 tool->context_switch = perf_event__process_switch;
 376         if (tool->read == NULL)
 377                 tool->read = process_event_sample_stub;
 378         if (tool->throttle == NULL)
 379                 tool->throttle = process_event_stub;
 380         if (tool->unthrottle == NULL)
 381                 tool->unthrottle = process_event_stub;
 382         if (tool->attr == NULL)
 383                 tool->attr = process_event_synth_attr_stub;
 384         if (tool->event_update == NULL)
 385                 tool->event_update = process_event_synth_event_update_stub;
 386         if (tool->tracing_data == NULL)
 387                 tool->tracing_data = process_event_synth_tracing_data_stub;
 388         if (tool->build_id == NULL)
 389                 tool->build_id = process_event_op2_stub;
 390         if (tool->finished_round == NULL) {
 391                 if (tool->ordered_events)
 392                         tool->finished_round = process_finished_round;
 393                 else
 394                         tool->finished_round = process_finished_round_stub;
 395         }
 396         if (tool->id_index == NULL)
 397                 tool->id_index = process_event_op2_stub;
 398         if (tool->auxtrace_info == NULL)
 399                 tool->auxtrace_info = process_event_op2_stub;
 400         if (tool->auxtrace == NULL)
 401                 tool->auxtrace = process_event_auxtrace_stub;
 402         if (tool->auxtrace_error == NULL)
 403                 tool->auxtrace_error = process_event_op2_stub;
 404         if (tool->thread_map == NULL)
 405                 tool->thread_map = process_event_thread_map_stub;
 406         if (tool->cpu_map == NULL)
 407                 tool->cpu_map = process_event_cpu_map_stub;
 408         if (tool->stat_config == NULL)
 409                 tool->stat_config = process_event_stat_config_stub;
 410         if (tool->stat == NULL)
 411                 tool->stat = process_stat_stub;
 412         if (tool->stat_round == NULL)
 413                 tool->stat_round = process_stat_round_stub;
 414         if (tool->time_conv == NULL)
 415                 tool->time_conv = process_event_op2_stub;
 416 }
 417
 418 static void swap_sample_id_all(union perf_event *event, void *data)
 419 {
 420         void *end = (void *) event + event->header.size;
 421         int size = end - data;
 422
 423         BUG_ON(size % sizeof(u64));
 424         mem_bswap_64(data, size);
 425 }
 426
 427 static void perf_event__all64_swap(union perf_event *event,
 428                                    bool sample_id_all __maybe_unused)
 429 {
 430         struct perf_event_header *hdr = &event->header;
 431         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 432 }
 433
 434 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 435 {
 436         event->comm.pid = bswap_32(event->comm.pid);
 437         event->comm.tid = bswap_32(event->comm.tid);
 438
 439         if (sample_id_all) {
 440                 void *data = &event->comm.comm;
 441
 442                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 443                 swap_sample_id_all(event, data);
 444         }
 445 }
 446
 447 static void perf_event__mmap_swap(union perf_event *event,
 448                                   bool sample_id_all)
 449 {
 450         event->mmap.pid   = bswap_32(event->mmap.pid);
 451         event->mmap.tid   = bswap_32(event->mmap.tid);
 452         event->mmap.start = bswap_64(event->mmap.start);
 453         event->mmap.len   = bswap_64(event->mmap.len);
 454         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 455
 456         if (sample_id_all) {
 457                 void *data = &event->mmap.filename;
 458
 459                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 460                 swap_sample_id_all(event, data);
 461         }
 462 }
 463
 464 static void perf_event__mmap2_swap(union perf_event *event,
 465                                   bool sample_id_all)
 466 {
 467         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 468         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 469         event->mmap2.start = bswap_64(event->mmap2.start);
 470         event->mmap2.len   = bswap_64(event->mmap2.len);
 471         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 472         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 473         event->mmap2.min   = bswap_32(event->mmap2.min);
 474         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 475
 476         if (sample_id_all) {
 477                 void *data = &event->mmap2.filename;
 478
 479                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 480                 swap_sample_id_all(event, data);
 481         }
 482 }
 483 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 484 {
 485         event->fork.pid  = bswap_32(event->fork.pid);
 486         event->fork.tid  = bswap_32(event->fork.tid);
 487         event->fork.ppid = bswap_32(event->fork.ppid);
 488         event->fork.ptid = bswap_32(event->fork.ptid);
 489         event->fork.time = bswap_64(event->fork.time);
 490
 491         if (sample_id_all)
 492                 swap_sample_id_all(event, &event->fork + 1);
 493 }
 494
 495 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 496 {
 497         event->read.pid          = bswap_32(event->read.pid);
 498         event->read.tid          = bswap_32(event->read.tid);
 499         event->read.value        = bswap_64(event->read.value);
 500         event->read.time_enabled = bswap_64(event->read.time_enabled);
 501         event->read.time_running = bswap_64(event->read.time_running);
 502         event->read.id           = bswap_64(event->read.id);
 503
 504         if (sample_id_all)
 505                 swap_sample_id_all(event, &event->read + 1);
 506 }
 507
 508 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 509 {
 510         event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 511         event->aux.aux_size   = bswap_64(event->aux.aux_size);
 512         event->aux.flags      = bswap_64(event->aux.flags);
 513
 514         if (sample_id_all)
 515                 swap_sample_id_all(event, &event->aux + 1);
 516 }
 517
 518 static void perf_event__itrace_start_swap(union perf_event *event,
 519                                           bool sample_id_all)
 520 {
 521         event->itrace_start.pid  = bswap_32(event->itrace_start.pid);
 522         event->itrace_start.tid  = bswap_32(event->itrace_start.tid);
 523
 524         if (sample_id_all)
 525                 swap_sample_id_all(event, &event->itrace_start + 1);
 526 }
 527
 528 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 529 {
 530         if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 531                 event->context_switch.next_prev_pid =
 532                                 bswap_32(event->context_switch.next_prev_pid);
 533                 event->context_switch.next_prev_tid =
 534                                 bswap_32(event->context_switch.next_prev_tid);
 535         }
 536
 537         if (sample_id_all)
 538                 swap_sample_id_all(event, &event->context_switch + 1);
 539 }
 540
 541 static void perf_event__throttle_swap(union perf_event *event,
 542                                       bool sample_id_all)
 543 {
 544         event->throttle.time      = bswap_64(event->throttle.time);
 545         event->throttle.id        = bswap_64(event->throttle.id);
 546         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 547
 548         if (sample_id_all)
 549                 swap_sample_id_all(event, &event->throttle + 1);
 550 }
 551
 552 static u8 revbyte(u8 b)
 553 {
 554         int rev = (b >> 4) | ((b & 0xf) << 4);
 555         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 556         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 557         return (u8) rev;
 558 }
 559
 560 /*
 561  * XXX this is hack in attempt to carry flags bitfield
 562  * through endian village. ABI says:
 563  *
 564  * Bit-fields are allocated from right to left (least to most significant)
 565  * on little-endian implementations and from left to right (most to least
 566  * significant) on big-endian implementations.
 567  *
 568  * The above seems to be byte specific, so we need to reverse each
 569  * byte of the bitfield. 'Internet' also says this might be implementation
 570  * specific and we probably need proper fix and carry perf_event_attr
 571  * bitfield flags in separate data file FEAT_ section. Thought this seems
 572  * to work for now.
 573  */
 574 static void swap_bitfield(u8 *p, unsigned len)
 575 {
 576         unsigned i;
 577
 578         for (i = 0; i < len; i++) {
 579                 *p = revbyte(*p);
 580                 p++;
 581         }
 582 }
 583
 584 /* exported for swapping attributes in file header */
 585 void perf_event__attr_swap(struct perf_event_attr *attr)
 586 {
 587         attr->type              = bswap_32(attr->type);
 588         attr->size              = bswap_32(attr->size);
 589
 590 #define bswap_safe(f, n)                                        \
 591         (attr->size > (offsetof(struct perf_event_attr, f) +    \
 592                        sizeof(attr->f) * (n)))
 593 #define bswap_field(f, sz)                      \
 594 do {                                            \
 595         if (bswap_safe(f, 0))                   \
 596                 attr->f = bswap_##sz(attr->f);  \
 597 } while(0)
 598 #define bswap_field_16(f) bswap_field(f, 16)
 599 #define bswap_field_32(f) bswap_field(f, 32)
 600 #define bswap_field_64(f) bswap_field(f, 64)
 601
 602         bswap_field_64(config);
 603         bswap_field_64(sample_period);
 604         bswap_field_64(sample_type);
 605         bswap_field_64(read_format);
 606         bswap_field_32(wakeup_events);
 607         bswap_field_32(bp_type);
 608         bswap_field_64(bp_addr);
 609         bswap_field_64(bp_len);
 610         bswap_field_64(branch_sample_type);
 611         bswap_field_64(sample_regs_user);
 612         bswap_field_32(sample_stack_user);
 613         bswap_field_32(aux_watermark);
 614         bswap_field_16(sample_max_stack);
 615
 616         /*
 617          * After read_format are bitfields. Check read_format because
 618          * we are unable to use offsetof on bitfield.
 619          */
 620         if (bswap_safe(read_format, 1))
 621                 swap_bitfield((u8 *) (&attr->read_format + 1),
 622                               sizeof(u64));
 623 #undef bswap_field_64
 624 #undef bswap_field_32
 625 #undef bswap_field
 626 #undef bswap_safe
 627 }
 628
 629 static void perf_event__hdr_attr_swap(union perf_event *event,
 630                                       bool sample_id_all __maybe_unused)
 631 {
 632         size_t size;
 633
 634         perf_event__attr_swap(&event->attr.attr);
 635
 636         size = event->header.size;
 637         size -= (void *)&event->attr.id - (void *)event;
 638         mem_bswap_64(event->attr.id, size);
 639 }
 640
 641 static void perf_event__event_update_swap(union perf_event *event,
 642                                           bool sample_id_all __maybe_unused)
 643 {
 644         event->event_update.type = bswap_64(event->event_update.type);
 645         event->event_update.id   = bswap_64(event->event_update.id);
 646 }
 647
 648 static void perf_event__event_type_swap(union perf_event *event,
 649                                         bool sample_id_all __maybe_unused)
 650 {
 651         event->event_type.event_type.event_id =
 652                 bswap_64(event->event_type.event_type.event_id);
 653 }
 654
 655 static void perf_event__tracing_data_swap(union perf_event *event,
 656                                           bool sample_id_all __maybe_unused)
 657 {
 658         event->tracing_data.size = bswap_32(event->tracing_data.size);
 659 }
 660
 661 static void perf_event__auxtrace_info_swap(union perf_event *event,
 662                                            bool sample_id_all __maybe_unused)
 663 {
 664         size_t size;
 665
 666         event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 667
 668         size = event->header.size;
 669         size -= (void *)&event->auxtrace_info.priv - (void *)event;
 670         mem_bswap_64(event->auxtrace_info.priv, size);
 671 }
 672
 673 static void perf_event__auxtrace_swap(union perf_event *event,
 674                                       bool sample_id_all __maybe_unused)
 675 {
 676         event->auxtrace.size      = bswap_64(event->auxtrace.size);
 677         event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 678         event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 679         event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 680         event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 681         event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 682 }
 683
 684 static void perf_event__auxtrace_error_swap(union perf_event *event,
 685                                             bool sample_id_all __maybe_unused)
 686 {
 687         event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 688         event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 689         event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 690         event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 691         event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 692         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 693 }
 694
 695 static void perf_event__thread_map_swap(union perf_event *event,
 696                                         bool sample_id_all __maybe_unused)
 697 {
 698         unsigned i;
 699
 700         event->thread_map.nr = bswap_64(event->thread_map.nr);
 701
 702         for (i = 0; i < event->thread_map.nr; i++)
 703                 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
 704 }
 705
 706 static void perf_event__cpu_map_swap(union perf_event *event,
 707                                      bool sample_id_all __maybe_unused)
 708 {
 709         struct cpu_map_data *data = &event->cpu_map.data;
 710         struct cpu_map_entries *cpus;
 711         struct cpu_map_mask *mask;
 712         unsigned i;
 713
 714         data->type = bswap_64(data->type);
 715
 716         switch (data->type) {
 717         case PERF_CPU_MAP__CPUS:
 718                 cpus = (struct cpu_map_entries *)data->data;
 719
 720                 cpus->nr = bswap_16(cpus->nr);
 721
 722                 for (i = 0; i < cpus->nr; i++)
 723                         cpus->cpu[i] = bswap_16(cpus->cpu[i]);
 724                 break;
 725         case PERF_CPU_MAP__MASK:
 726                 mask = (struct cpu_map_mask *) data->data;
 727
 728                 mask->nr = bswap_16(mask->nr);
 729                 mask->long_size = bswap_16(mask->long_size);
 730
 731                 switch (mask->long_size) {
 732                 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
 733                 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
 734                 default:
 735                         pr_err("cpu_map swap: unsupported long size\n");
 736                 }
 737         default:
 738                 break;
 739         }
 740 }
 741
 742 static void perf_event__stat_config_swap(union perf_event *event,
 743                                          bool sample_id_all __maybe_unused)
 744 {
 745         u64 size;
 746
 747         size  = event->stat_config.nr * sizeof(event->stat_config.data[0]);
 748         size += 1; /* nr item itself */
 749         mem_bswap_64(&event->stat_config.nr, size);
 750 }
 751
 752 static void perf_event__stat_swap(union perf_event *event,
 753                                   bool sample_id_all __maybe_unused)
 754 {
 755         event->stat.id     = bswap_64(event->stat.id);
 756         event->stat.thread = bswap_32(event->stat.thread);
 757         event->stat.cpu    = bswap_32(event->stat.cpu);
 758         event->stat.val    = bswap_64(event->stat.val);
 759         event->stat.ena    = bswap_64(event->stat.ena);
 760         event->stat.run    = bswap_64(event->stat.run);
 761 }
 762
 763 static void perf_event__stat_round_swap(union perf_event *event,
 764                                         bool sample_id_all __maybe_unused)
 765 {
 766         event->stat_round.type = bswap_64(event->stat_round.type);
 767         event->stat_round.time = bswap_64(event->stat_round.time);
 768 }
 769
 770 typedef void (*perf_event__swap_op)(union perf_event *event,
 771                                     bool sample_id_all);
 772
 773 static perf_event__swap_op perf_event__swap_ops[] = {
 774         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 775         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 776         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 777         [PERF_RECORD_FORK]                = perf_event__task_swap,
 778         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 779         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 780         [PERF_RECORD_READ]                = perf_event__read_swap,
 781         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 782         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 783         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 784         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
 785         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
 786         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
 787         [PERF_RECORD_SWITCH]              = perf_event__switch_swap,
 788         [PERF_RECORD_SWITCH_CPU_WIDE]     = perf_event__switch_swap,
 789         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 790         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 791         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 792         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 793         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
 794         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
 795         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
 796         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
 797         [PERF_RECORD_THREAD_MAP]          = perf_event__thread_map_swap,
 798         [PERF_RECORD_CPU_MAP]             = perf_event__cpu_map_swap,
 799         [PERF_RECORD_STAT_CONFIG]         = perf_event__stat_config_swap,
 800         [PERF_RECORD_STAT]                = perf_event__stat_swap,
 801         [PERF_RECORD_STAT_ROUND]          = perf_event__stat_round_swap,
 802         [PERF_RECORD_EVENT_UPDATE]        = perf_event__event_update_swap,
 803         [PERF_RECORD_TIME_CONV]           = perf_event__all64_swap,
 804         [PERF_RECORD_HEADER_MAX]          = NULL,
 805 };
 806
 807 /*
 808  * When perf record finishes a pass on every buffers, it records this pseudo
 809  * event.
 810  * We record the max timestamp t found in the pass n.
 811  * Assuming these timestamps are monotonic across cpus, we know that if
 812  * a buffer still has events with timestamps below t, they will be all
 813  * available and then read in the pass n + 1.
 814  * Hence when we start to read the pass n + 2, we can safely flush every
 815  * events with timestamps below t.
 816  *
 817  *    ============ PASS n =================
 818  *       CPU 0         |   CPU 1
 819  *                     |
 820  *    cnt1 timestamps  |   cnt2 timestamps
 821  *          1          |         2
 822  *          2          |         3
 823  *          -          |         4  <--- max recorded
 824  *
 825  *    ============ PASS n + 1 ==============
 826  *       CPU 0         |   CPU 1
 827  *                     |
 828  *    cnt1 timestamps  |   cnt2 timestamps
 829  *          3          |         5
 830  *          4          |         6
 831  *          5          |         7 <---- max recorded
 832  *
 833  *      Flush every events below timestamp 4
 834  *
 835  *    ============ PASS n + 2 ==============
 836  *       CPU 0         |   CPU 1
 837  *                     |
 838  *    cnt1 timestamps  |   cnt2 timestamps
 839  *          6          |         8
 840  *          7          |         9
 841  *          -          |         10
 842  *
 843  *      Flush every events below timestamp 7
 844  *      etc...
 845  */
 846 static int process_finished_round(struct perf_tool *tool __maybe_unused,
 847                                   union perf_event *event __maybe_unused,
 848                                   struct ordered_events *oe)
 849 {
 850         if (dump_trace)
 851                 fprintf(stdout, "\n");
 852         return ordered_events__flush(oe, OE_FLUSH__ROUND);
 853 }
 854
 855 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
 856                               struct perf_sample *sample, u64 file_offset)
 857 {
 858         return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
 859 }
 860
 861 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 862 {
 863         struct ip_callchain *callchain = sample->callchain;
 864         struct branch_stack *lbr_stack = sample->branch_stack;
 865         u64 kernel_callchain_nr = callchain->nr;
 866         unsigned int i;
 867
 868         for (i = 0; i < kernel_callchain_nr; i++) {
 869                 if (callchain->ips[i] == PERF_CONTEXT_USER)
 870                         break;
 871         }
 872
 873         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 874                 u64 total_nr;
 875                 /*
 876                  * LBR callstack can only get user call chain,
 877                  * i is kernel call chain number,
 878                  * 1 is PERF_CONTEXT_USER.
 879                  *
 880                  * The user call chain is stored in LBR registers.
 881                  * LBR are pair registers. The caller is stored
 882                  * in "from" register, while the callee is stored
 883                  * in "to" register.
 884                  * For example, there is a call stack
 885                  * "A"->"B"->"C"->"D".
 886                  * The LBR registers will recorde like
 887                  * "C"->"D", "B"->"C", "A"->"B".
 888                  * So only the first "to" register and all "from"
 889                  * registers are needed to construct the whole stack.
 890                  */
 891                 total_nr = i + 1 + lbr_stack->nr + 1;
 892                 kernel_callchain_nr = i + 1;
 893
 894                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 895
 896                 for (i = 0; i < kernel_callchain_nr; i++)
 897                         printf("..... %2d: %016" PRIx64 "\n",
 898                                i, callchain->ips[i]);
 899
 900                 printf("..... %2d: %016" PRIx64 "\n",
 901                        (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 902                 for (i = 0; i < lbr_stack->nr; i++)
 903                         printf("..... %2d: %016" PRIx64 "\n",
 904                                (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 905         }
 906 }
 907
 908 static void callchain__printf(struct perf_evsel *evsel,
 909                               struct perf_sample *sample)
 910 {
 911         unsigned int i;
 912         struct ip_callchain *callchain = sample->callchain;
 913
 914         if (perf_evsel__has_branch_callstack(evsel))
 915                 callchain__lbr_callstack_printf(sample);
 916
 917         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 918
 919         for (i = 0; i < callchain->nr; i++)
 920                 printf("..... %2d: %016" PRIx64 "\n",
 921                        i, callchain->ips[i]);
 922 }
 923
 924 static void branch_stack__printf(struct perf_sample *sample)
 925 {
 926         uint64_t i;
 927
 928         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 929
 930         for (i = 0; i < sample->branch_stack->nr; i++) {
 931                 struct branch_entry *e = &sample->branch_stack->entries[i];
 932
 933                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
 934                         i, e->from, e->to,
 935                         e->flags.cycles,
 936                         e->flags.mispred ? "M" : " ",
 937                         e->flags.predicted ? "P" : " ",
 938                         e->flags.abort ? "A" : " ",
 939                         e->flags.in_tx ? "T" : " ",
 940                         (unsigned)e->flags.reserved);
 941         }
 942 }
 943
 944 static void regs_dump__printf(u64 mask, u64 *regs)
 945 {
 946         unsigned rid, i = 0;
 947
 948         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 949                 u64 val = regs[i++];
 950
 951                 printf(".... %-5s 0x%" PRIx64 "\n",
 952                        perf_reg_name(rid), val);
 953         }
 954 }
 955
 956 static const char *regs_abi[] = {
 957         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
 958         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 959         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 960 };
 961
 962 static inline const char *regs_dump_abi(struct regs_dump *d)
 963 {
 964         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 965                 return "unknown";
 966
 967         return regs_abi[d->abi];
 968 }
 969
 970 static void regs__printf(const char *type, struct regs_dump *regs)
 971 {
 972         u64 mask = regs->mask;
 973
 974         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 975                type,
 976                mask,
 977                regs_dump_abi(regs));
 978
 979         regs_dump__printf(mask, regs->regs);
 980 }
 981
 982 static void regs_user__printf(struct perf_sample *sample)
 983 {
 984         struct regs_dump *user_regs = &sample->user_regs;
 985
 986         if (user_regs->regs)
 987                 regs__printf("user", user_regs);
 988 }
 989
 990 static void regs_intr__printf(struct perf_sample *sample)
 991 {
 992         struct regs_dump *intr_regs = &sample->intr_regs;
 993
 994         if (intr_regs->regs)
 995                 regs__printf("intr", intr_regs);
 996 }
 997
 998 static void stack_user__printf(struct stack_dump *dump)
 999 {
1000         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1001                dump->size, dump->offset);
1002 }
1003
1004 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1005                                        union perf_event *event,
1006                                        struct perf_sample *sample)
1007 {
1008         u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1009
1010         if (event->header.type != PERF_RECORD_SAMPLE &&
1011             !perf_evlist__sample_id_all(evlist)) {
1012                 fputs("-1 -1 ", stdout);
1013                 return;
1014         }
1015
1016         if ((sample_type & PERF_SAMPLE_CPU))
1017                 printf("%u ", sample->cpu);
1018
1019         if (sample_type & PERF_SAMPLE_TIME)
1020                 printf("%" PRIu64 " ", sample->time);
1021 }
1022
1023 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1024 {
1025         printf("... sample_read:\n");
1026
1027         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1028                 printf("...... time enabled %016" PRIx64 "\n",
1029                        sample->read.time_enabled);
1030
1031         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1032                 printf("...... time running %016" PRIx64 "\n",
1033                        sample->read.time_running);
1034
1035         if (read_format & PERF_FORMAT_GROUP) {
1036                 u64 i;
1037
1038                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1039
1040                 for (i = 0; i < sample->read.group.nr; i++) {
1041                         struct sample_read_value *value;
1042
1043                         value = &sample->read.group.values[i];
1044                         printf("..... id %016" PRIx64
1045                                ", value %016" PRIx64 "\n",
1046                                value->id, value->value);
1047                 }
1048         } else
1049                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1050                         sample->read.one.id, sample->read.one.value);
1051 }
1052
1053 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1054                        u64 file_offset, struct perf_sample *sample)
1055 {
1056         if (!dump_trace)
1057                 return;
1058
1059         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1060                file_offset, event->header.size, event->header.type);
1061
1062         trace_event(event);
1063
1064         if (sample)
1065                 perf_evlist__print_tstamp(evlist, event, sample);
1066
1067         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1068                event->header.size, perf_event__name(event->header.type));
1069 }
1070
1071 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1072                         struct perf_sample *sample)
1073 {
1074         u64 sample_type;
1075
1076         if (!dump_trace)
1077                 return;
1078
1079         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1080                event->header.misc, sample->pid, sample->tid, sample->ip,
1081                sample->period, sample->addr);
1082
1083         sample_type = evsel->attr.sample_type;
1084
1085         if (sample_type & PERF_SAMPLE_CALLCHAIN)
1086                 callchain__printf(evsel, sample);
1087
1088         if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel))
1089                 branch_stack__printf(sample);
1090
1091         if (sample_type & PERF_SAMPLE_REGS_USER)
1092                 regs_user__printf(sample);
1093
1094         if (sample_type & PERF_SAMPLE_REGS_INTR)
1095                 regs_intr__printf(sample);
1096
1097         if (sample_type & PERF_SAMPLE_STACK_USER)
1098                 stack_user__printf(&sample->user_stack);
1099
1100         if (sample_type & PERF_SAMPLE_WEIGHT)
1101                 printf("... weight: %" PRIu64 "\n", sample->weight);
1102
1103         if (sample_type & PERF_SAMPLE_DATA_SRC)
1104                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1105
1106         if (sample_type & PERF_SAMPLE_TRANSACTION)
1107                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1108
1109         if (sample_type & PERF_SAMPLE_READ)
1110                 sample_read__printf(sample, evsel->attr.read_format);
1111 }
1112
1113 static struct machine *machines__find_for_cpumode(struct machines *machines,
1114                                                union perf_event *event,
1115                                                struct perf_sample *sample)
1116 {
1117         struct machine *machine;
1118
1119         if (perf_guest &&
1120             ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1121              (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1122                 u32 pid;
1123
1124                 if (event->header.type == PERF_RECORD_MMAP
1125                     || event->header.type == PERF_RECORD_MMAP2)
1126                         pid = event->mmap.pid;
1127                 else
1128                         pid = sample->pid;
1129
1130                 machine = machines__find(machines, pid);
1131                 if (!machine)
1132                         machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1133                 return machine;
1134         }
1135
1136         return &machines->host;
1137 }
1138
1139 static int deliver_sample_value(struct perf_evlist *evlist,
1140                                 struct perf_tool *tool,
1141                                 union perf_event *event,
1142                                 struct perf_sample *sample,
1143                                 struct sample_read_value *v,
1144                                 struct machine *machine)
1145 {
1146         struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1147
1148         if (sid) {
1149                 sample->id     = v->id;
1150                 sample->period = v->value - sid->period;
1151                 sid->period    = v->value;
1152         }
1153
1154         if (!sid || sid->evsel == NULL) {
1155                 ++evlist->stats.nr_unknown_id;
1156                 return 0;
1157         }
1158
1159         return tool->sample(tool, event, sample, sid->evsel, machine);
1160 }
1161
1162 static int deliver_sample_group(struct perf_evlist *evlist,
1163                                 struct perf_tool *tool,
1164                                 union  perf_event *event,
1165                                 struct perf_sample *sample,
1166                                 struct machine *machine)
1167 {
1168         int ret = -EINVAL;
1169         u64 i;
1170
1171         for (i = 0; i < sample->read.group.nr; i++) {
1172                 ret = deliver_sample_value(evlist, tool, event, sample,
1173                                            &sample->read.group.values[i],
1174                                            machine);
1175                 if (ret)
1176                         break;
1177         }
1178
1179         return ret;
1180 }
1181
1182 static int
1183  perf_evlist__deliver_sample(struct perf_evlist *evlist,
1184                              struct perf_tool *tool,
1185                              union  perf_event *event,
1186                              struct perf_sample *sample,
1187                              struct perf_evsel *evsel,
1188                              struct machine *machine)
1189 {
1190         /* We know evsel != NULL. */
1191         u64 sample_type = evsel->attr.sample_type;
1192         u64 read_format = evsel->attr.read_format;
1193
1194         /* Standard sample delievery. */
1195         if (!(sample_type & PERF_SAMPLE_READ))
1196                 return tool->sample(tool, event, sample, evsel, machine);
1197
1198         /* For PERF_SAMPLE_READ we have either single or group mode. */
1199         if (read_format & PERF_FORMAT_GROUP)
1200                 return deliver_sample_group(evlist, tool, event, sample,
1201                                             machine);
1202         else
1203                 return deliver_sample_value(evlist, tool, event, sample,
1204                                             &sample->read.one, machine);
1205 }
1206
1207 static int machines__deliver_event(struct machines *machines,
1208                                    struct perf_evlist *evlist,
1209                                    union perf_event *event,
1210                                    struct perf_sample *sample,
1211                                    struct perf_tool *tool, u64 file_offset)
1212 {
1213         struct perf_evsel *evsel;
1214         struct machine *machine;
1215
1216         dump_event(evlist, event, file_offset, sample);
1217
1218         evsel = perf_evlist__id2evsel(evlist, sample->id);
1219
1220         machine = machines__find_for_cpumode(machines, event, sample);
1221
1222         switch (event->header.type) {
1223         case PERF_RECORD_SAMPLE:
1224                 if (evsel == NULL) {
1225                         ++evlist->stats.nr_unknown_id;
1226                         return 0;
1227                 }
1228                 dump_sample(evsel, event, sample);
1229                 if (machine == NULL) {
1230                         ++evlist->stats.nr_unprocessable_samples;
1231                         return 0;
1232                 }
1233                 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1234         case PERF_RECORD_MMAP:
1235                 return tool->mmap(tool, event, sample, machine);
1236         case PERF_RECORD_MMAP2:
1237                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1238                         ++evlist->stats.nr_proc_map_timeout;
1239                 return tool->mmap2(tool, event, sample, machine);
1240         case PERF_RECORD_COMM:
1241                 return tool->comm(tool, event, sample, machine);
1242         case PERF_RECORD_FORK:
1243                 return tool->fork(tool, event, sample, machine);
1244         case PERF_RECORD_EXIT:
1245                 return tool->exit(tool, event, sample, machine);
1246         case PERF_RECORD_LOST:
1247                 if (tool->lost == perf_event__process_lost)
1248                         evlist->stats.total_lost += event->lost.lost;
1249                 return tool->lost(tool, event, sample, machine);
1250         case PERF_RECORD_LOST_SAMPLES:
1251                 if (tool->lost_samples == perf_event__process_lost_samples)
1252                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1253                 return tool->lost_samples(tool, event, sample, machine);
1254         case PERF_RECORD_READ:
1255                 return tool->read(tool, event, sample, evsel, machine);
1256         case PERF_RECORD_THROTTLE:
1257                 return tool->throttle(tool, event, sample, machine);
1258         case PERF_RECORD_UNTHROTTLE:
1259                 return tool->unthrottle(tool, event, sample, machine);
1260         case PERF_RECORD_AUX:
1261                 if (tool->aux == perf_event__process_aux &&
1262                     (event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
1263                         evlist->stats.total_aux_lost += 1;
1264                 return tool->aux(tool, event, sample, machine);
1265         case PERF_RECORD_ITRACE_START:
1266                 return tool->itrace_start(tool, event, sample, machine);
1267         case PERF_RECORD_SWITCH:
1268         case PERF_RECORD_SWITCH_CPU_WIDE:
1269                 return tool->context_switch(tool, event, sample, machine);
1270         default:
1271                 ++evlist->stats.nr_unknown_events;
1272                 return -1;
1273         }
1274 }
1275
1276 static int perf_session__deliver_event(struct perf_session *session,
1277                                        union perf_event *event,
1278                                        struct perf_sample *sample,
1279                                        struct perf_tool *tool,
1280                                        u64 file_offset)
1281 {
1282         int ret;
1283
1284         ret = auxtrace__process_event(session, event, sample, tool);
1285         if (ret < 0)
1286                 return ret;
1287         if (ret > 0)
1288                 return 0;
1289
1290         return machines__deliver_event(&session->machines, session->evlist,
1291                                        event, sample, tool, file_offset);
1292 }
1293
1294 static s64 perf_session__process_user_event(struct perf_session *session,
1295                                             union perf_event *event,
1296                                             u64 file_offset)
1297 {
1298         struct ordered_events *oe = &session->ordered_events;
1299         struct perf_tool *tool = session->tool;
1300         int fd = perf_data_file__fd(session->file);
1301         int err;
1302
1303         dump_event(session->evlist, event, file_offset, NULL);
1304
1305         /* These events are processed right away */
1306         switch (event->header.type) {
1307         case PERF_RECORD_HEADER_ATTR:
1308                 err = tool->attr(tool, event, &session->evlist);
1309                 if (err == 0) {
1310                         perf_session__set_id_hdr_size(session);
1311                         perf_session__set_comm_exec(session);
1312                 }
1313                 return err;
1314         case PERF_RECORD_EVENT_UPDATE:
1315                 return tool->event_update(tool, event, &session->evlist);
1316         case PERF_RECORD_HEADER_EVENT_TYPE:
1317                 /*
1318                  * Depreceated, but we need to handle it for sake
1319                  * of old data files create in pipe mode.
1320                  */
1321                 return 0;
1322         case PERF_RECORD_HEADER_TRACING_DATA:
1323                 /* setup for reading amidst mmap */
1324                 lseek(fd, file_offset, SEEK_SET);
1325                 return tool->tracing_data(tool, event, session);
1326         case PERF_RECORD_HEADER_BUILD_ID:
1327                 return tool->build_id(tool, event, session);
1328         case PERF_RECORD_FINISHED_ROUND:
1329                 return tool->finished_round(tool, event, oe);
1330         case PERF_RECORD_ID_INDEX:
1331                 return tool->id_index(tool, event, session);
1332         case PERF_RECORD_AUXTRACE_INFO:
1333                 return tool->auxtrace_info(tool, event, session);
1334         case PERF_RECORD_AUXTRACE:
1335                 /* setup for reading amidst mmap */
1336                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1337                 return tool->auxtrace(tool, event, session);
1338         case PERF_RECORD_AUXTRACE_ERROR:
1339                 perf_session__auxtrace_error_inc(session, event);
1340                 return tool->auxtrace_error(tool, event, session);
1341         case PERF_RECORD_THREAD_MAP:
1342                 return tool->thread_map(tool, event, session);
1343         case PERF_RECORD_CPU_MAP:
1344                 return tool->cpu_map(tool, event, session);
1345         case PERF_RECORD_STAT_CONFIG:
1346                 return tool->stat_config(tool, event, session);
1347         case PERF_RECORD_STAT:
1348                 return tool->stat(tool, event, session);
1349         case PERF_RECORD_STAT_ROUND:
1350                 return tool->stat_round(tool, event, session);
1351         case PERF_RECORD_TIME_CONV:
1352                 session->time_conv = event->time_conv;
1353                 return tool->time_conv(tool, event, session);
1354         default:
1355                 return -EINVAL;
1356         }
1357 }
1358
1359 int perf_session__deliver_synth_event(struct perf_session *session,
1360                                       union perf_event *event,
1361                                       struct perf_sample *sample)
1362 {
1363         struct perf_evlist *evlist = session->evlist;
1364         struct perf_tool *tool = session->tool;
1365
1366         events_stats__inc(&evlist->stats, event->header.type);
1367
1368         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1369                 return perf_session__process_user_event(session, event, 0);
1370
1371         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1372 }
1373
1374 static void event_swap(union perf_event *event, bool sample_id_all)
1375 {
1376         perf_event__swap_op swap;
1377
1378         swap = perf_event__swap_ops[event->header.type];
1379         if (swap)
1380                 swap(event, sample_id_all);
1381 }
1382
1383 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1384                              void *buf, size_t buf_sz,
1385                              union perf_event **event_ptr,
1386                              struct perf_sample *sample)
1387 {
1388         union perf_event *event;
1389         size_t hdr_sz, rest;
1390         int fd;
1391
1392         if (session->one_mmap && !session->header.needs_swap) {
1393                 event = file_offset - session->one_mmap_offset +
1394                         session->one_mmap_addr;
1395                 goto out_parse_sample;
1396         }
1397
1398         if (perf_data_file__is_pipe(session->file))
1399                 return -1;
1400
1401         fd = perf_data_file__fd(session->file);
1402         hdr_sz = sizeof(struct perf_event_header);
1403
1404         if (buf_sz < hdr_sz)
1405                 return -1;
1406
1407         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1408             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1409                 return -1;
1410
1411         event = (union perf_event *)buf;
1412
1413         if (session->header.needs_swap)
1414                 perf_event_header__bswap(&event->header);
1415
1416         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1417                 return -1;
1418
1419         rest = event->header.size - hdr_sz;
1420
1421         if (readn(fd, buf, rest) != (ssize_t)rest)
1422                 return -1;
1423
1424         if (session->header.needs_swap)
1425                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1426
1427 out_parse_sample:
1428
1429         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1430             perf_evlist__parse_sample(session->evlist, event, sample))
1431                 return -1;
1432
1433         *event_ptr = event;
1434
1435         return 0;
1436 }
1437
1438 static s64 perf_session__process_event(struct perf_session *session,
1439                                        union perf_event *event, u64 file_offset)
1440 {
1441         struct perf_evlist *evlist = session->evlist;
1442         struct perf_tool *tool = session->tool;
1443         struct perf_sample sample;
1444         int ret;
1445
1446         if (session->header.needs_swap)
1447                 event_swap(event, perf_evlist__sample_id_all(evlist));
1448
1449         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1450                 return -EINVAL;
1451
1452         events_stats__inc(&evlist->stats, event->header.type);
1453
1454         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1455                 return perf_session__process_user_event(session, event, file_offset);
1456
1457         /*
1458          * For all kernel events we get the sample data
1459          */
1460         ret = perf_evlist__parse_sample(evlist, event, &sample);
1461         if (ret)
1462                 return ret;
1463
1464         if (tool->ordered_events) {
1465                 ret = perf_session__queue_event(session, event, &sample, file_offset);
1466                 if (ret != -ETIME)
1467                         return ret;
1468         }
1469
1470         return perf_session__deliver_event(session, event, &sample, tool,
1471                                            file_offset);
1472 }
1473
1474 void perf_event_header__bswap(struct perf_event_header *hdr)
1475 {
1476         hdr->type = bswap_32(hdr->type);
1477         hdr->misc = bswap_16(hdr->misc);
1478         hdr->size = bswap_16(hdr->size);
1479 }
1480
1481 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1482 {
1483         return machine__findnew_thread(&session->machines.host, -1, pid);
1484 }
1485
1486 int perf_session__register_idle_thread(struct perf_session *session)
1487 {
1488         struct thread *thread;
1489         int err = 0;
1490
1491         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1492         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1493                 pr_err("problem inserting idle task.\n");
1494                 err = -1;
1495         }
1496
1497         /* machine__findnew_thread() got the thread, so put it */
1498         thread__put(thread);
1499         return err;
1500 }
1501
1502 static void
1503 perf_session__warn_order(const struct perf_session *session)
1504 {
1505         const struct ordered_events *oe = &session->ordered_events;
1506         struct perf_evsel *evsel;
1507         bool should_warn = true;
1508
1509         evlist__for_each_entry(session->evlist, evsel) {
1510                 if (evsel->attr.write_backward)
1511                         should_warn = false;
1512         }
1513
1514         if (!should_warn)
1515                 return;
1516         if (oe->nr_unordered_events != 0)
1517                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1518 }
1519
1520 static void perf_session__warn_about_errors(const struct perf_session *session)
1521 {
1522         const struct events_stats *stats = &session->evlist->stats;
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         perf_session__warn_order(session);
1580
1581         events_stats__auxtrace_error_warn(stats);
1582
1583         if (stats->nr_proc_map_timeout != 0) {
1584                 ui__warning("%d map information files for pre-existing threads were\n"
1585                             "not processed, if there are samples for addresses they\n"
1586                             "will not be resolved, you may find out which are these\n"
1587                             "threads by running with -v and redirecting the output\n"
1588                             "to a file.\n"
1589                             "The time limit to process proc map is too short?\n"
1590                             "Increase it by --proc-map-timeout\n",
1591                             stats->nr_proc_map_timeout);
1592         }
1593 }
1594
1595 static int perf_session__flush_thread_stack(struct thread *thread,
1596                                             void *p __maybe_unused)
1597 {
1598         return thread_stack__flush(thread);
1599 }
1600
1601 static int perf_session__flush_thread_stacks(struct perf_session *session)
1602 {
1603         return machines__for_each_thread(&session->machines,
1604                                          perf_session__flush_thread_stack,
1605                                          NULL);
1606 }
1607
1608 volatile int session_done;
1609
1610 static int __perf_session__process_pipe_events(struct perf_session *session)
1611 {
1612         struct ordered_events *oe = &session->ordered_events;
1613         struct perf_tool *tool = session->tool;
1614         int fd = perf_data_file__fd(session->file);
1615         union perf_event *event;
1616         uint32_t size, cur_size = 0;
1617         void *buf = NULL;
1618         s64 skip = 0;
1619         u64 head;
1620         ssize_t err;
1621         void *p;
1622
1623         perf_tool__fill_defaults(tool);
1624
1625         head = 0;
1626         cur_size = sizeof(union perf_event);
1627
1628         buf = malloc(cur_size);
1629         if (!buf)
1630                 return -errno;
1631 more:
1632         event = buf;
1633         err = readn(fd, event, sizeof(struct perf_event_header));
1634         if (err <= 0) {
1635                 if (err == 0)
1636                         goto done;
1637
1638                 pr_err("failed to read event header\n");
1639                 goto out_err;
1640         }
1641
1642         if (session->header.needs_swap)
1643                 perf_event_header__bswap(&event->header);
1644
1645         size = event->header.size;
1646         if (size < sizeof(struct perf_event_header)) {
1647                 pr_err("bad event header size\n");
1648                 goto out_err;
1649         }
1650
1651         if (size > cur_size) {
1652                 void *new = realloc(buf, size);
1653                 if (!new) {
1654                         pr_err("failed to allocate memory to read event\n");
1655                         goto out_err;
1656                 }
1657                 buf = new;
1658                 cur_size = size;
1659                 event = buf;
1660         }
1661         p = event;
1662         p += sizeof(struct perf_event_header);
1663
1664         if (size - sizeof(struct perf_event_header)) {
1665                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1666                 if (err <= 0) {
1667                         if (err == 0) {
1668                                 pr_err("unexpected end of event stream\n");
1669                                 goto done;
1670                         }
1671
1672                         pr_err("failed to read event data\n");
1673                         goto out_err;
1674                 }
1675         }
1676
1677         if ((skip = perf_session__process_event(session, event, head)) < 0) {
1678                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1679                        head, event->header.size, event->header.type);
1680                 err = -EINVAL;
1681                 goto out_err;
1682         }
1683
1684         head += size;
1685
1686         if (skip > 0)
1687                 head += skip;
1688
1689         if (!session_done())
1690                 goto more;
1691 done:
1692         /* do the final flush for ordered samples */
1693         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1694         if (err)
1695                 goto out_err;
1696         err = auxtrace__flush_events(session, tool);
1697         if (err)
1698                 goto out_err;
1699         err = perf_session__flush_thread_stacks(session);
1700 out_err:
1701         free(buf);
1702         perf_session__warn_about_errors(session);
1703         ordered_events__free(&session->ordered_events);
1704         auxtrace__free_events(session);
1705         return err;
1706 }
1707
1708 static union perf_event *
1709 fetch_mmaped_event(struct perf_session *session,
1710                    u64 head, size_t mmap_size, char *buf)
1711 {
1712         union perf_event *event;
1713
1714         /*
1715          * Ensure we have enough space remaining to read
1716          * the size of the event in the headers.
1717          */
1718         if (head + sizeof(event->header) > mmap_size)
1719                 return NULL;
1720
1721         event = (union perf_event *)(buf + head);
1722
1723         if (session->header.needs_swap)
1724                 perf_event_header__bswap(&event->header);
1725
1726         if (head + event->header.size > mmap_size) {
1727                 /* We're not fetching the event so swap back again */
1728                 if (session->header.needs_swap)
1729                         perf_event_header__bswap(&event->header);
1730                 return NULL;
1731         }
1732
1733         return event;
1734 }
1735
1736 /*
1737  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1738  * slices. On 32bit we use 32MB.
1739  */
1740 #if BITS_PER_LONG == 64
1741 #define MMAP_SIZE ULLONG_MAX
1742 #define NUM_MMAPS 1
1743 #else
1744 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1745 #define NUM_MMAPS 128
1746 #endif
1747
1748 static int __perf_session__process_events(struct perf_session *session,
1749                                           u64 data_offset, u64 data_size,
1750                                           u64 file_size)
1751 {
1752         struct ordered_events *oe = &session->ordered_events;
1753         struct perf_tool *tool = session->tool;
1754         int fd = perf_data_file__fd(session->file);
1755         u64 head, page_offset, file_offset, file_pos, size;
1756         int err, mmap_prot, mmap_flags, map_idx = 0;
1757         size_t  mmap_size;
1758         char *buf, *mmaps[NUM_MMAPS];
1759         union perf_event *event;
1760         struct ui_progress prog;
1761         s64 skip;
1762
1763         perf_tool__fill_defaults(tool);
1764
1765         page_offset = page_size * (data_offset / page_size);
1766         file_offset = page_offset;
1767         head = data_offset - page_offset;
1768
1769         if (data_size == 0)
1770                 goto out;
1771
1772         if (data_offset + data_size < file_size)
1773                 file_size = data_offset + data_size;
1774
1775         ui_progress__init(&prog, file_size, "Processing events...");
1776
1777         mmap_size = MMAP_SIZE;
1778         if (mmap_size > file_size) {
1779                 mmap_size = file_size;
1780                 session->one_mmap = true;
1781         }
1782
1783         memset(mmaps, 0, sizeof(mmaps));
1784
1785         mmap_prot  = PROT_READ;
1786         mmap_flags = MAP_SHARED;
1787
1788         if (session->header.needs_swap) {
1789                 mmap_prot  |= PROT_WRITE;
1790                 mmap_flags = MAP_PRIVATE;
1791         }
1792 remap:
1793         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1794                    file_offset);
1795         if (buf == MAP_FAILED) {
1796                 pr_err("failed to mmap file\n");
1797                 err = -errno;
1798                 goto out_err;
1799         }
1800         mmaps[map_idx] = buf;
1801         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1802         file_pos = file_offset + head;
1803         if (session->one_mmap) {
1804                 session->one_mmap_addr = buf;
1805                 session->one_mmap_offset = file_offset;
1806         }
1807
1808 more:
1809         event = fetch_mmaped_event(session, head, mmap_size, buf);
1810         if (!event) {
1811                 if (mmaps[map_idx]) {
1812                         munmap(mmaps[map_idx], mmap_size);
1813                         mmaps[map_idx] = NULL;
1814                 }
1815
1816                 page_offset = page_size * (head / page_size);
1817                 file_offset += page_offset;
1818                 head -= page_offset;
1819                 goto remap;
1820         }
1821
1822         size = event->header.size;
1823
1824         if (size < sizeof(struct perf_event_header) ||
1825             (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1826                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1827                        file_offset + head, event->header.size,
1828                        event->header.type);
1829                 err = -EINVAL;
1830                 goto out_err;
1831         }
1832
1833         if (skip)
1834                 size += skip;
1835
1836         head += size;
1837         file_pos += size;
1838
1839         ui_progress__update(&prog, size);
1840
1841         if (session_done())
1842                 goto out;
1843
1844         if (file_pos < file_size)
1845                 goto more;
1846
1847 out:
1848         /* do the final flush for ordered samples */
1849         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1850         if (err)
1851                 goto out_err;
1852         err = auxtrace__flush_events(session, tool);
1853         if (err)
1854                 goto out_err;
1855         err = perf_session__flush_thread_stacks(session);
1856 out_err:
1857         ui_progress__finish();
1858         perf_session__warn_about_errors(session);
1859         /*
1860          * We may switching perf.data output, make ordered_events
1861          * reusable.
1862          */
1863         ordered_events__reinit(&session->ordered_events);
1864         auxtrace__free_events(session);
1865         session->one_mmap = false;
1866         return err;
1867 }
1868
1869 int perf_session__process_events(struct perf_session *session)
1870 {
1871         u64 size = perf_data_file__size(session->file);
1872         int err;
1873
1874         if (perf_session__register_idle_thread(session) < 0)
1875                 return -ENOMEM;
1876
1877         if (!perf_data_file__is_pipe(session->file))
1878                 err = __perf_session__process_events(session,
1879                                                      session->header.data_offset,
1880                                                      session->header.data_size, size);
1881         else
1882                 err = __perf_session__process_pipe_events(session);
1883
1884         return err;
1885 }
1886
1887 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1888 {
1889         struct perf_evsel *evsel;
1890
1891         evlist__for_each_entry(session->evlist, evsel) {
1892                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1893                         return true;
1894         }
1895
1896         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1897         return false;
1898 }
1899
1900 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1901                                      const char *symbol_name, u64 addr)
1902 {
1903         char *bracket;
1904         enum map_type i;
1905         struct ref_reloc_sym *ref;
1906
1907         ref = zalloc(sizeof(struct ref_reloc_sym));
1908         if (ref == NULL)
1909                 return -ENOMEM;
1910
1911         ref->name = strdup(symbol_name);
1912         if (ref->name == NULL) {
1913                 free(ref);
1914                 return -ENOMEM;
1915         }
1916
1917         bracket = strchr(ref->name, ']');
1918         if (bracket)
1919                 *bracket = '\0';
1920
1921         ref->addr = addr;
1922
1923         for (i = 0; i < MAP__NR_TYPES; ++i) {
1924                 struct kmap *kmap = map__kmap(maps[i]);
1925
1926                 if (!kmap)
1927                         continue;
1928                 kmap->ref_reloc_sym = ref;
1929         }
1930
1931         return 0;
1932 }
1933
1934 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1935 {
1936         return machines__fprintf_dsos(&session->machines, fp);
1937 }
1938
1939 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1940                                           bool (skip)(struct dso *dso, int parm), int parm)
1941 {
1942         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1943 }
1944
1945 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1946 {
1947         size_t ret;
1948         const char *msg = "";
1949
1950         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1951                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1952
1953         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1954
1955         ret += events_stats__fprintf(&session->evlist->stats, fp);
1956         return ret;
1957 }
1958
1959 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1960 {
1961         /*
1962          * FIXME: Here we have to actually print all the machines in this
1963          * session, not just the host...
1964          */
1965         return machine__fprintf(&session->machines.host, fp);
1966 }
1967
1968 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1969                                               unsigned int type)
1970 {
1971         struct perf_evsel *pos;
1972
1973         evlist__for_each_entry(session->evlist, pos) {
1974                 if (pos->attr.type == type)
1975                         return pos;
1976         }
1977         return NULL;
1978 }
1979
1980 int perf_session__cpu_bitmap(struct perf_session *session,
1981                              const char *cpu_list, unsigned long *cpu_bitmap)
1982 {
1983         int i, err = -1;
1984         struct cpu_map *map;
1985
1986         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1987                 struct perf_evsel *evsel;
1988
1989                 evsel = perf_session__find_first_evtype(session, i);
1990                 if (!evsel)
1991                         continue;
1992
1993                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1994                         pr_err("File does not contain CPU events. "
1995                                "Remove -c option to proceed.\n");
1996                         return -1;
1997                 }
1998         }
1999
2000         map = cpu_map__new(cpu_list);
2001         if (map == NULL) {
2002                 pr_err("Invalid cpu_list\n");
2003                 return -1;
2004         }
2005
2006         for (i = 0; i < map->nr; i++) {
2007                 int cpu = map->map[i];
2008
2009                 if (cpu >= MAX_NR_CPUS) {
2010                         pr_err("Requested CPU %d too large. "
2011                                "Consider raising MAX_NR_CPUS\n", cpu);
2012                         goto out_delete_map;
2013                 }
2014
2015                 set_bit(cpu, cpu_bitmap);
2016         }
2017
2018         err = 0;
2019
2020 out_delete_map:
2021         cpu_map__put(map);
2022         return err;
2023 }
2024
2025 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2026                                 bool full)
2027 {
2028         struct stat st;
2029         int fd, ret;
2030
2031         if (session == NULL || fp == NULL)
2032                 return;
2033
2034         fd = perf_data_file__fd(session->file);
2035
2036         ret = fstat(fd, &st);
2037         if (ret == -1)
2038                 return;
2039
2040         fprintf(fp, "# ========\n");
2041         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
2042         perf_header__fprintf_info(session, fp, full);
2043         fprintf(fp, "# ========\n#\n");
2044 }
2045
2046
2047 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2048                                              const struct perf_evsel_str_handler *assocs,
2049                                              size_t nr_assocs)
2050 {
2051         struct perf_evsel *evsel;
2052         size_t i;
2053         int err;
2054
2055         for (i = 0; i < nr_assocs; i++) {
2056                 /*
2057                  * Adding a handler for an event not in the session,
2058                  * just ignore it.
2059                  */
2060                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2061                 if (evsel == NULL)
2062                         continue;
2063
2064                 err = -EEXIST;
2065                 if (evsel->handler != NULL)
2066                         goto out;
2067                 evsel->handler = assocs[i].handler;
2068         }
2069
2070         err = 0;
2071 out:
2072         return err;
2073 }
2074
2075 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2076                                  union perf_event *event,
2077                                  struct perf_session *session)
2078 {
2079         struct perf_evlist *evlist = session->evlist;
2080         struct id_index_event *ie = &event->id_index;
2081         size_t i, nr, max_nr;
2082
2083         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2084                  sizeof(struct id_index_entry);
2085         nr = ie->nr;
2086         if (nr > max_nr)
2087                 return -EINVAL;
2088
2089         if (dump_trace)
2090                 fprintf(stdout, " nr: %zu\n", nr);
2091
2092         for (i = 0; i < nr; i++) {
2093                 struct id_index_entry *e = &ie->entries[i];
2094                 struct perf_sample_id *sid;
2095
2096                 if (dump_trace) {
2097                         fprintf(stdout, " ... id: %"PRIu64, e->id);
2098                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
2099                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
2100                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
2101                 }
2102
2103                 sid = perf_evlist__id2sid(evlist, e->id);
2104                 if (!sid)
2105                         return -ENOENT;
2106                 sid->idx = e->idx;
2107                 sid->cpu = e->cpu;
2108                 sid->tid = e->tid;
2109         }
2110         return 0;
2111 }
2112
2113 int perf_event__synthesize_id_index(struct perf_tool *tool,
2114                                     perf_event__handler_t process,
2115                                     struct perf_evlist *evlist,
2116                                     struct machine *machine)
2117 {
2118         union perf_event *ev;
2119         struct perf_evsel *evsel;
2120         size_t nr = 0, i = 0, sz, max_nr, n;
2121         int err;
2122
2123         pr_debug2("Synthesizing id index\n");
2124
2125         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2126                  sizeof(struct id_index_entry);
2127
2128         evlist__for_each_entry(evlist, evsel)
2129                 nr += evsel->ids;
2130
2131         n = nr > max_nr ? max_nr : nr;
2132         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2133         ev = zalloc(sz);
2134         if (!ev)
2135                 return -ENOMEM;
2136
2137         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2138         ev->id_index.header.size = sz;
2139         ev->id_index.nr = n;
2140
2141         evlist__for_each_entry(evlist, evsel) {
2142                 u32 j;
2143
2144                 for (j = 0; j < evsel->ids; j++) {
2145                         struct id_index_entry *e;
2146                         struct perf_sample_id *sid;
2147
2148                         if (i >= n) {
2149                                 err = process(tool, ev, NULL, machine);
2150                                 if (err)
2151                                         goto out_err;
2152                                 nr -= n;
2153                                 i = 0;
2154                         }
2155
2156                         e = &ev->id_index.entries[i++];
2157
2158                         e->id = evsel->id[j];
2159
2160                         sid = perf_evlist__id2sid(evlist, e->id);
2161                         if (!sid) {
2162                                 free(ev);
2163                                 return -ENOENT;
2164                         }
2165
2166                         e->idx = sid->idx;
2167                         e->cpu = sid->cpu;
2168                         e->tid = sid->tid;
2169                 }
2170         }
2171
2172         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2173         ev->id_index.header.size = sz;
2174         ev->id_index.nr = nr;
2175
2176         err = process(tool, ev, NULL, machine);
2177 out_err:
2178         free(ev);
2179
2180         return err;
2181 }