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