tools/perf/util/session.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <errno.h>
   3 #include <inttypes.h>
   4 #include <linux/err.h>
   5 #include <linux/kernel.h>
   6 #include <linux/zalloc.h>
   7 #include <api/fs/fs.h>
   8
   9 #include <byteswap.h>
  10 #include <unistd.h>
  11 #include <sys/types.h>
  12 #include <sys/mman.h>
  13 #include <perf/cpumap.h>
  14
  15 #include "map_symbol.h"
  16 #include "branch.h"
  17 #include "debug.h"
  18 #include "env.h"
  19 #include "evlist.h"
  20 #include "evsel.h"
  21 #include "memswap.h"
  22 #include "map.h"
  23 #include "symbol.h"
  24 #include "session.h"
  25 #include "tool.h"
  26 #include "perf_regs.h"
  27 #include "asm/bug.h"
  28 #include "auxtrace.h"
  29 #include "thread.h"
  30 #include "thread-stack.h"
  31 #include "sample-raw.h"
  32 #include "stat.h"
  33 #include "tsc.h"
  34 #include "ui/progress.h"
  35 #include "../perf.h"
  36 #include "arch/common.h"
  37 #include "units.h"
  38 #include <internal/lib.h>
  39
  40 #ifdef HAVE_ZSTD_SUPPORT
  41 static int perf_session__process_compressed_event(struct perf_session *session,
  42                                                   union perf_event *event, u64 file_offset,
  43                                                   const char *file_path)
  44 {
  45         void *src;
  46         size_t decomp_size, src_size;
  47         u64 decomp_last_rem = 0;
  48         size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
  49         struct decomp *decomp, *decomp_last = session->active_decomp->decomp_last;
  50
  51         if (decomp_last) {
  52                 decomp_last_rem = decomp_last->size - decomp_last->head;
  53                 decomp_len += decomp_last_rem;
  54         }
  55
  56         mmap_len = sizeof(struct decomp) + decomp_len;
  57         decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
  58                       MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
  59         if (decomp == MAP_FAILED) {
  60                 pr_err("Couldn't allocate memory for decompression\n");
  61                 return -1;
  62         }
  63
  64         decomp->file_pos = file_offset;
  65         decomp->file_path = file_path;
  66         decomp->mmap_len = mmap_len;
  67         decomp->head = 0;
  68
  69         if (decomp_last_rem) {
  70                 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
  71                 decomp->size = decomp_last_rem;
  72         }
  73
  74         src = (void *)event + sizeof(struct perf_record_compressed);
  75         src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
  76
  77         decomp_size = zstd_decompress_stream(session->active_decomp->zstd_decomp, src, src_size,
  78                                 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
  79         if (!decomp_size) {
  80                 munmap(decomp, mmap_len);
  81                 pr_err("Couldn't decompress data\n");
  82                 return -1;
  83         }
  84
  85         decomp->size += decomp_size;
  86
  87         if (session->active_decomp->decomp == NULL)
  88                 session->active_decomp->decomp = decomp;
  89         else
  90                 session->active_decomp->decomp_last->next = decomp;
  91
  92         session->active_decomp->decomp_last = decomp;
  93
  94         pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size);
  95
  96         return 0;
  97 }
  98 #else /* !HAVE_ZSTD_SUPPORT */
  99 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub
 100 #endif
 101
 102 static int perf_session__deliver_event(struct perf_session *session,
 103                                        union perf_event *event,
 104                                        struct perf_tool *tool,
 105                                        u64 file_offset,
 106                                        const char *file_path);
 107
 108 static int perf_session__open(struct perf_session *session, int repipe_fd)
 109 {
 110         struct perf_data *data = session->data;
 111
 112         if (perf_session__read_header(session, repipe_fd) < 0) {
 113                 pr_err("incompatible file format (rerun with -v to learn more)\n");
 114                 return -1;
 115         }
 116
 117         if (perf_data__is_pipe(data))
 118                 return 0;
 119
 120         if (perf_header__has_feat(&session->header, HEADER_STAT))
 121                 return 0;
 122
 123         if (!evlist__valid_sample_type(session->evlist)) {
 124                 pr_err("non matching sample_type\n");
 125                 return -1;
 126         }
 127
 128         if (!evlist__valid_sample_id_all(session->evlist)) {
 129                 pr_err("non matching sample_id_all\n");
 130                 return -1;
 131         }
 132
 133         if (!evlist__valid_read_format(session->evlist)) {
 134                 pr_err("non matching read_format\n");
 135                 return -1;
 136         }
 137
 138         return 0;
 139 }
 140
 141 void perf_session__set_id_hdr_size(struct perf_session *session)
 142 {
 143         u16 id_hdr_size = evlist__id_hdr_size(session->evlist);
 144
 145         machines__set_id_hdr_size(&session->machines, id_hdr_size);
 146 }
 147
 148 int perf_session__create_kernel_maps(struct perf_session *session)
 149 {
 150         int ret = machine__create_kernel_maps(&session->machines.host);
 151
 152         if (ret >= 0)
 153                 ret = machines__create_guest_kernel_maps(&session->machines);
 154         return ret;
 155 }
 156
 157 static void perf_session__destroy_kernel_maps(struct perf_session *session)
 158 {
 159         machines__destroy_kernel_maps(&session->machines);
 160 }
 161
 162 static bool perf_session__has_comm_exec(struct perf_session *session)
 163 {
 164         struct evsel *evsel;
 165
 166         evlist__for_each_entry(session->evlist, evsel) {
 167                 if (evsel->core.attr.comm_exec)
 168                         return true;
 169         }
 170
 171         return false;
 172 }
 173
 174 static void perf_session__set_comm_exec(struct perf_session *session)
 175 {
 176         bool comm_exec = perf_session__has_comm_exec(session);
 177
 178         machines__set_comm_exec(&session->machines, comm_exec);
 179 }
 180
 181 static int ordered_events__deliver_event(struct ordered_events *oe,
 182                                          struct ordered_event *event)
 183 {
 184         struct perf_session *session = container_of(oe, struct perf_session,
 185                                                     ordered_events);
 186
 187         return perf_session__deliver_event(session, event->event,
 188                                            session->tool, event->file_offset,
 189                                            event->file_path);
 190 }
 191
 192 struct perf_session *__perf_session__new(struct perf_data *data,
 193                                          bool repipe, int repipe_fd,
 194                                          struct perf_tool *tool)
 195 {
 196         int ret = -ENOMEM;
 197         struct perf_session *session = zalloc(sizeof(*session));
 198
 199         if (!session)
 200                 goto out;
 201
 202         session->repipe = repipe;
 203         session->tool   = tool;
 204         session->decomp_data.zstd_decomp = &session->zstd_data;
 205         session->active_decomp = &session->decomp_data;
 206         INIT_LIST_HEAD(&session->auxtrace_index);
 207         machines__init(&session->machines);
 208         ordered_events__init(&session->ordered_events,
 209                              ordered_events__deliver_event, NULL);
 210
 211         perf_env__init(&session->header.env);
 212         if (data) {
 213                 ret = perf_data__open(data);
 214                 if (ret < 0)
 215                         goto out_delete;
 216
 217                 session->data = data;
 218
 219                 if (perf_data__is_read(data)) {
 220                         ret = perf_session__open(session, repipe_fd);
 221                         if (ret < 0)
 222                                 goto out_delete;
 223
 224                         /*
 225                          * set session attributes that are present in perf.data
 226                          * but not in pipe-mode.
 227                          */
 228                         if (!data->is_pipe) {
 229                                 perf_session__set_id_hdr_size(session);
 230                                 perf_session__set_comm_exec(session);
 231                         }
 232
 233                         evlist__init_trace_event_sample_raw(session->evlist);
 234
 235                         /* Open the directory data. */
 236                         if (data->is_dir) {
 237                                 ret = perf_data__open_dir(data);
 238                                 if (ret)
 239                                         goto out_delete;
 240                         }
 241
 242                         if (!symbol_conf.kallsyms_name &&
 243                             !symbol_conf.vmlinux_name)
 244                                 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
 245                 }
 246         } else  {
 247                 session->machines.host.env = &perf_env;
 248         }
 249
 250         session->machines.host.single_address_space =
 251                 perf_env__single_address_space(session->machines.host.env);
 252
 253         if (!data || perf_data__is_write(data)) {
 254                 /*
 255                  * In O_RDONLY mode this will be performed when reading the
 256                  * kernel MMAP event, in perf_event__process_mmap().
 257                  */
 258                 if (perf_session__create_kernel_maps(session) < 0)
 259                         pr_warning("Cannot read kernel map\n");
 260         }
 261
 262         /*
 263          * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
 264          * processed, so evlist__sample_id_all is not meaningful here.
 265          */
 266         if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
 267             tool->ordered_events && !evlist__sample_id_all(session->evlist)) {
 268                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 269                 tool->ordered_events = false;
 270         }
 271
 272         return session;
 273
 274  out_delete:
 275         perf_session__delete(session);
 276  out:
 277         return ERR_PTR(ret);
 278 }
 279
 280 static void perf_session__delete_threads(struct perf_session *session)
 281 {
 282         machine__delete_threads(&session->machines.host);
 283 }
 284
 285 static void perf_decomp__release_events(struct decomp *next)
 286 {
 287         struct decomp *decomp;
 288         size_t mmap_len;
 289
 290         do {
 291                 decomp = next;
 292                 if (decomp == NULL)
 293                         break;
 294                 next = decomp->next;
 295                 mmap_len = decomp->mmap_len;
 296                 munmap(decomp, mmap_len);
 297         } while (1);
 298 }
 299
 300 void perf_session__delete(struct perf_session *session)
 301 {
 302         if (session == NULL)
 303                 return;
 304         auxtrace__free(session);
 305         auxtrace_index__free(&session->auxtrace_index);
 306         perf_session__destroy_kernel_maps(session);
 307         perf_session__delete_threads(session);
 308         perf_decomp__release_events(session->decomp_data.decomp);
 309         perf_env__exit(&session->header.env);
 310         machines__exit(&session->machines);
 311         if (session->data) {
 312                 if (perf_data__is_read(session->data))
 313                         evlist__delete(session->evlist);
 314                 perf_data__close(session->data);
 315         }
 316         trace_event__cleanup(&session->tevent);
 317         free(session);
 318 }
 319
 320 static int process_event_synth_tracing_data_stub(struct perf_session *session
 321                                                  __maybe_unused,
 322                                                  union perf_event *event
 323                                                  __maybe_unused)
 324 {
 325         dump_printf(": unhandled!\n");
 326         return 0;
 327 }
 328
 329 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 330                                          union perf_event *event __maybe_unused,
 331                                          struct evlist **pevlist
 332                                          __maybe_unused)
 333 {
 334         dump_printf(": unhandled!\n");
 335         return 0;
 336 }
 337
 338 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
 339                                                  union perf_event *event __maybe_unused,
 340                                                  struct evlist **pevlist
 341                                                  __maybe_unused)
 342 {
 343         if (dump_trace)
 344                 perf_event__fprintf_event_update(event, stdout);
 345
 346         dump_printf(": unhandled!\n");
 347         return 0;
 348 }
 349
 350 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 351                                      union perf_event *event __maybe_unused,
 352                                      struct perf_sample *sample __maybe_unused,
 353                                      struct evsel *evsel __maybe_unused,
 354                                      struct machine *machine __maybe_unused)
 355 {
 356         dump_printf(": unhandled!\n");
 357         return 0;
 358 }
 359
 360 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 361                               union perf_event *event __maybe_unused,
 362                               struct perf_sample *sample __maybe_unused,
 363                               struct machine *machine __maybe_unused)
 364 {
 365         dump_printf(": unhandled!\n");
 366         return 0;
 367 }
 368
 369 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 370                                        union perf_event *event __maybe_unused,
 371                                        struct ordered_events *oe __maybe_unused)
 372 {
 373         dump_printf(": unhandled!\n");
 374         return 0;
 375 }
 376
 377 static int process_finished_round(struct perf_tool *tool,
 378                                   union perf_event *event,
 379                                   struct ordered_events *oe);
 380
 381 static int skipn(int fd, off_t n)
 382 {
 383         char buf[4096];
 384         ssize_t ret;
 385
 386         while (n > 0) {
 387                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 388                 if (ret <= 0)
 389                         return ret;
 390                 n -= ret;
 391         }
 392
 393         return 0;
 394 }
 395
 396 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
 397                                        union perf_event *event)
 398 {
 399         dump_printf(": unhandled!\n");
 400         if (perf_data__is_pipe(session->data))
 401                 skipn(perf_data__fd(session->data), event->auxtrace.size);
 402         return event->auxtrace.size;
 403 }
 404
 405 static int process_event_op2_stub(struct perf_session *session __maybe_unused,
 406                                   union perf_event *event __maybe_unused)
 407 {
 408         dump_printf(": unhandled!\n");
 409         return 0;
 410 }
 411
 412
 413 static
 414 int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
 415                                   union perf_event *event __maybe_unused)
 416 {
 417         if (dump_trace)
 418                 perf_event__fprintf_thread_map(event, stdout);
 419
 420         dump_printf(": unhandled!\n");
 421         return 0;
 422 }
 423
 424 static
 425 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
 426                                union perf_event *event __maybe_unused)
 427 {
 428         if (dump_trace)
 429                 perf_event__fprintf_cpu_map(event, stdout);
 430
 431         dump_printf(": unhandled!\n");
 432         return 0;
 433 }
 434
 435 static
 436 int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
 437                                    union perf_event *event __maybe_unused)
 438 {
 439         if (dump_trace)
 440                 perf_event__fprintf_stat_config(event, stdout);
 441
 442         dump_printf(": unhandled!\n");
 443         return 0;
 444 }
 445
 446 static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
 447                              union perf_event *event)
 448 {
 449         if (dump_trace)
 450                 perf_event__fprintf_stat(event, stdout);
 451
 452         dump_printf(": unhandled!\n");
 453         return 0;
 454 }
 455
 456 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
 457                                    union perf_event *event)
 458 {
 459         if (dump_trace)
 460                 perf_event__fprintf_stat_round(event, stdout);
 461
 462         dump_printf(": unhandled!\n");
 463         return 0;
 464 }
 465
 466 static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused,
 467                                         union perf_event *event)
 468 {
 469         if (dump_trace)
 470                 perf_event__fprintf_time_conv(event, stdout);
 471
 472         dump_printf(": unhandled!\n");
 473         return 0;
 474 }
 475
 476 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
 477                                                        union perf_event *event __maybe_unused,
 478                                                        u64 file_offset __maybe_unused,
 479                                                        const char *file_path __maybe_unused)
 480 {
 481        dump_printf(": unhandled!\n");
 482        return 0;
 483 }
 484
 485 void perf_tool__fill_defaults(struct perf_tool *tool)
 486 {
 487         if (tool->sample == NULL)
 488                 tool->sample = process_event_sample_stub;
 489         if (tool->mmap == NULL)
 490                 tool->mmap = process_event_stub;
 491         if (tool->mmap2 == NULL)
 492                 tool->mmap2 = process_event_stub;
 493         if (tool->comm == NULL)
 494                 tool->comm = process_event_stub;
 495         if (tool->namespaces == NULL)
 496                 tool->namespaces = process_event_stub;
 497         if (tool->cgroup == NULL)
 498                 tool->cgroup = process_event_stub;
 499         if (tool->fork == NULL)
 500                 tool->fork = process_event_stub;
 501         if (tool->exit == NULL)
 502                 tool->exit = process_event_stub;
 503         if (tool->lost == NULL)
 504                 tool->lost = perf_event__process_lost;
 505         if (tool->lost_samples == NULL)
 506                 tool->lost_samples = perf_event__process_lost_samples;
 507         if (tool->aux == NULL)
 508                 tool->aux = perf_event__process_aux;
 509         if (tool->itrace_start == NULL)
 510                 tool->itrace_start = perf_event__process_itrace_start;
 511         if (tool->context_switch == NULL)
 512                 tool->context_switch = perf_event__process_switch;
 513         if (tool->ksymbol == NULL)
 514                 tool->ksymbol = perf_event__process_ksymbol;
 515         if (tool->bpf == NULL)
 516                 tool->bpf = perf_event__process_bpf;
 517         if (tool->text_poke == NULL)
 518                 tool->text_poke = perf_event__process_text_poke;
 519         if (tool->aux_output_hw_id == NULL)
 520                 tool->aux_output_hw_id = perf_event__process_aux_output_hw_id;
 521         if (tool->read == NULL)
 522                 tool->read = process_event_sample_stub;
 523         if (tool->throttle == NULL)
 524                 tool->throttle = process_event_stub;
 525         if (tool->unthrottle == NULL)
 526                 tool->unthrottle = process_event_stub;
 527         if (tool->attr == NULL)
 528                 tool->attr = process_event_synth_attr_stub;
 529         if (tool->event_update == NULL)
 530                 tool->event_update = process_event_synth_event_update_stub;
 531         if (tool->tracing_data == NULL)
 532                 tool->tracing_data = process_event_synth_tracing_data_stub;
 533         if (tool->build_id == NULL)
 534                 tool->build_id = process_event_op2_stub;
 535         if (tool->finished_round == NULL) {
 536                 if (tool->ordered_events)
 537                         tool->finished_round = process_finished_round;
 538                 else
 539                         tool->finished_round = process_finished_round_stub;
 540         }
 541         if (tool->id_index == NULL)
 542                 tool->id_index = process_event_op2_stub;
 543         if (tool->auxtrace_info == NULL)
 544                 tool->auxtrace_info = process_event_op2_stub;
 545         if (tool->auxtrace == NULL)
 546                 tool->auxtrace = process_event_auxtrace_stub;
 547         if (tool->auxtrace_error == NULL)
 548                 tool->auxtrace_error = process_event_op2_stub;
 549         if (tool->thread_map == NULL)
 550                 tool->thread_map = process_event_thread_map_stub;
 551         if (tool->cpu_map == NULL)
 552                 tool->cpu_map = process_event_cpu_map_stub;
 553         if (tool->stat_config == NULL)
 554                 tool->stat_config = process_event_stat_config_stub;
 555         if (tool->stat == NULL)
 556                 tool->stat = process_stat_stub;
 557         if (tool->stat_round == NULL)
 558                 tool->stat_round = process_stat_round_stub;
 559         if (tool->time_conv == NULL)
 560                 tool->time_conv = process_event_time_conv_stub;
 561         if (tool->feature == NULL)
 562                 tool->feature = process_event_op2_stub;
 563         if (tool->compressed == NULL)
 564                 tool->compressed = perf_session__process_compressed_event;
 565 }
 566
 567 static void swap_sample_id_all(union perf_event *event, void *data)
 568 {
 569         void *end = (void *) event + event->header.size;
 570         int size = end - data;
 571
 572         BUG_ON(size % sizeof(u64));
 573         mem_bswap_64(data, size);
 574 }
 575
 576 static void perf_event__all64_swap(union perf_event *event,
 577                                    bool sample_id_all __maybe_unused)
 578 {
 579         struct perf_event_header *hdr = &event->header;
 580         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 581 }
 582
 583 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 584 {
 585         event->comm.pid = bswap_32(event->comm.pid);
 586         event->comm.tid = bswap_32(event->comm.tid);
 587
 588         if (sample_id_all) {
 589                 void *data = &event->comm.comm;
 590
 591                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 592                 swap_sample_id_all(event, data);
 593         }
 594 }
 595
 596 static void perf_event__mmap_swap(union perf_event *event,
 597                                   bool sample_id_all)
 598 {
 599         event->mmap.pid   = bswap_32(event->mmap.pid);
 600         event->mmap.tid   = bswap_32(event->mmap.tid);
 601         event->mmap.start = bswap_64(event->mmap.start);
 602         event->mmap.len   = bswap_64(event->mmap.len);
 603         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 604
 605         if (sample_id_all) {
 606                 void *data = &event->mmap.filename;
 607
 608                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 609                 swap_sample_id_all(event, data);
 610         }
 611 }
 612
 613 static void perf_event__mmap2_swap(union perf_event *event,
 614                                   bool sample_id_all)
 615 {
 616         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 617         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 618         event->mmap2.start = bswap_64(event->mmap2.start);
 619         event->mmap2.len   = bswap_64(event->mmap2.len);
 620         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 621
 622         if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) {
 623                 event->mmap2.maj   = bswap_32(event->mmap2.maj);
 624                 event->mmap2.min   = bswap_32(event->mmap2.min);
 625                 event->mmap2.ino   = bswap_64(event->mmap2.ino);
 626                 event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation);
 627         }
 628
 629         if (sample_id_all) {
 630                 void *data = &event->mmap2.filename;
 631
 632                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 633                 swap_sample_id_all(event, data);
 634         }
 635 }
 636 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 637 {
 638         event->fork.pid  = bswap_32(event->fork.pid);
 639         event->fork.tid  = bswap_32(event->fork.tid);
 640         event->fork.ppid = bswap_32(event->fork.ppid);
 641         event->fork.ptid = bswap_32(event->fork.ptid);
 642         event->fork.time = bswap_64(event->fork.time);
 643
 644         if (sample_id_all)
 645                 swap_sample_id_all(event, &event->fork + 1);
 646 }
 647
 648 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 649 {
 650         event->read.pid          = bswap_32(event->read.pid);
 651         event->read.tid          = bswap_32(event->read.tid);
 652         event->read.value        = bswap_64(event->read.value);
 653         event->read.time_enabled = bswap_64(event->read.time_enabled);
 654         event->read.time_running = bswap_64(event->read.time_running);
 655         event->read.id           = bswap_64(event->read.id);
 656
 657         if (sample_id_all)
 658                 swap_sample_id_all(event, &event->read + 1);
 659 }
 660
 661 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 662 {
 663         event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 664         event->aux.aux_size   = bswap_64(event->aux.aux_size);
 665         event->aux.flags      = bswap_64(event->aux.flags);
 666
 667         if (sample_id_all)
 668                 swap_sample_id_all(event, &event->aux + 1);
 669 }
 670
 671 static void perf_event__itrace_start_swap(union perf_event *event,
 672                                           bool sample_id_all)
 673 {
 674         event->itrace_start.pid  = bswap_32(event->itrace_start.pid);
 675         event->itrace_start.tid  = bswap_32(event->itrace_start.tid);
 676
 677         if (sample_id_all)
 678                 swap_sample_id_all(event, &event->itrace_start + 1);
 679 }
 680
 681 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 682 {
 683         if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 684                 event->context_switch.next_prev_pid =
 685                                 bswap_32(event->context_switch.next_prev_pid);
 686                 event->context_switch.next_prev_tid =
 687                                 bswap_32(event->context_switch.next_prev_tid);
 688         }
 689
 690         if (sample_id_all)
 691                 swap_sample_id_all(event, &event->context_switch + 1);
 692 }
 693
 694 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all)
 695 {
 696         event->text_poke.addr    = bswap_64(event->text_poke.addr);
 697         event->text_poke.old_len = bswap_16(event->text_poke.old_len);
 698         event->text_poke.new_len = bswap_16(event->text_poke.new_len);
 699
 700         if (sample_id_all) {
 701                 size_t len = sizeof(event->text_poke.old_len) +
 702                              sizeof(event->text_poke.new_len) +
 703                              event->text_poke.old_len +
 704                              event->text_poke.new_len;
 705                 void *data = &event->text_poke.old_len;
 706
 707                 data += PERF_ALIGN(len, sizeof(u64));
 708                 swap_sample_id_all(event, data);
 709         }
 710 }
 711
 712 static void perf_event__throttle_swap(union perf_event *event,
 713                                       bool sample_id_all)
 714 {
 715         event->throttle.time      = bswap_64(event->throttle.time);
 716         event->throttle.id        = bswap_64(event->throttle.id);
 717         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 718
 719         if (sample_id_all)
 720                 swap_sample_id_all(event, &event->throttle + 1);
 721 }
 722
 723 static void perf_event__namespaces_swap(union perf_event *event,
 724                                         bool sample_id_all)
 725 {
 726         u64 i;
 727
 728         event->namespaces.pid           = bswap_32(event->namespaces.pid);
 729         event->namespaces.tid           = bswap_32(event->namespaces.tid);
 730         event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces);
 731
 732         for (i = 0; i < event->namespaces.nr_namespaces; i++) {
 733                 struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
 734
 735                 ns->dev = bswap_64(ns->dev);
 736                 ns->ino = bswap_64(ns->ino);
 737         }
 738
 739         if (sample_id_all)
 740                 swap_sample_id_all(event, &event->namespaces.link_info[i]);
 741 }
 742
 743 static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all)
 744 {
 745         event->cgroup.id = bswap_64(event->cgroup.id);
 746
 747         if (sample_id_all) {
 748                 void *data = &event->cgroup.path;
 749
 750                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 751                 swap_sample_id_all(event, data);
 752         }
 753 }
 754
 755 static u8 revbyte(u8 b)
 756 {
 757         int rev = (b >> 4) | ((b & 0xf) << 4);
 758         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 759         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 760         return (u8) rev;
 761 }
 762
 763 /*
 764  * XXX this is hack in attempt to carry flags bitfield
 765  * through endian village. ABI says:
 766  *
 767  * Bit-fields are allocated from right to left (least to most significant)
 768  * on little-endian implementations and from left to right (most to least
 769  * significant) on big-endian implementations.
 770  *
 771  * The above seems to be byte specific, so we need to reverse each
 772  * byte of the bitfield. 'Internet' also says this might be implementation
 773  * specific and we probably need proper fix and carry perf_event_attr
 774  * bitfield flags in separate data file FEAT_ section. Thought this seems
 775  * to work for now.
 776  */
 777 static void swap_bitfield(u8 *p, unsigned len)
 778 {
 779         unsigned i;
 780
 781         for (i = 0; i < len; i++) {
 782                 *p = revbyte(*p);
 783                 p++;
 784         }
 785 }
 786
 787 /* exported for swapping attributes in file header */
 788 void perf_event__attr_swap(struct perf_event_attr *attr)
 789 {
 790         attr->type              = bswap_32(attr->type);
 791         attr->size              = bswap_32(attr->size);
 792
 793 #define bswap_safe(f, n)                                        \
 794         (attr->size > (offsetof(struct perf_event_attr, f) +    \
 795                        sizeof(attr->f) * (n)))
 796 #define bswap_field(f, sz)                      \
 797 do {                                            \
 798         if (bswap_safe(f, 0))                   \
 799                 attr->f = bswap_##sz(attr->f);  \
 800 } while(0)
 801 #define bswap_field_16(f) bswap_field(f, 16)
 802 #define bswap_field_32(f) bswap_field(f, 32)
 803 #define bswap_field_64(f) bswap_field(f, 64)
 804
 805         bswap_field_64(config);
 806         bswap_field_64(sample_period);
 807         bswap_field_64(sample_type);
 808         bswap_field_64(read_format);
 809         bswap_field_32(wakeup_events);
 810         bswap_field_32(bp_type);
 811         bswap_field_64(bp_addr);
 812         bswap_field_64(bp_len);
 813         bswap_field_64(branch_sample_type);
 814         bswap_field_64(sample_regs_user);
 815         bswap_field_32(sample_stack_user);
 816         bswap_field_32(aux_watermark);
 817         bswap_field_16(sample_max_stack);
 818         bswap_field_32(aux_sample_size);
 819
 820         /*
 821          * After read_format are bitfields. Check read_format because
 822          * we are unable to use offsetof on bitfield.
 823          */
 824         if (bswap_safe(read_format, 1))
 825                 swap_bitfield((u8 *) (&attr->read_format + 1),
 826                               sizeof(u64));
 827 #undef bswap_field_64
 828 #undef bswap_field_32
 829 #undef bswap_field
 830 #undef bswap_safe
 831 }
 832
 833 static void perf_event__hdr_attr_swap(union perf_event *event,
 834                                       bool sample_id_all __maybe_unused)
 835 {
 836         size_t size;
 837
 838         perf_event__attr_swap(&event->attr.attr);
 839
 840         size = event->header.size;
 841         size -= (void *)&event->attr.id - (void *)event;
 842         mem_bswap_64(event->attr.id, size);
 843 }
 844
 845 static void perf_event__event_update_swap(union perf_event *event,
 846                                           bool sample_id_all __maybe_unused)
 847 {
 848         event->event_update.type = bswap_64(event->event_update.type);
 849         event->event_update.id   = bswap_64(event->event_update.id);
 850 }
 851
 852 static void perf_event__event_type_swap(union perf_event *event,
 853                                         bool sample_id_all __maybe_unused)
 854 {
 855         event->event_type.event_type.event_id =
 856                 bswap_64(event->event_type.event_type.event_id);
 857 }
 858
 859 static void perf_event__tracing_data_swap(union perf_event *event,
 860                                           bool sample_id_all __maybe_unused)
 861 {
 862         event->tracing_data.size = bswap_32(event->tracing_data.size);
 863 }
 864
 865 static void perf_event__auxtrace_info_swap(union perf_event *event,
 866                                            bool sample_id_all __maybe_unused)
 867 {
 868         size_t size;
 869
 870         event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 871
 872         size = event->header.size;
 873         size -= (void *)&event->auxtrace_info.priv - (void *)event;
 874         mem_bswap_64(event->auxtrace_info.priv, size);
 875 }
 876
 877 static void perf_event__auxtrace_swap(union perf_event *event,
 878                                       bool sample_id_all __maybe_unused)
 879 {
 880         event->auxtrace.size      = bswap_64(event->auxtrace.size);
 881         event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 882         event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 883         event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 884         event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 885         event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 886 }
 887
 888 static void perf_event__auxtrace_error_swap(union perf_event *event,
 889                                             bool sample_id_all __maybe_unused)
 890 {
 891         event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 892         event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 893         event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 894         event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 895         event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 896         event->auxtrace_error.fmt  = bswap_32(event->auxtrace_error.fmt);
 897         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 898         if (event->auxtrace_error.fmt)
 899                 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
 900 }
 901
 902 static void perf_event__thread_map_swap(union perf_event *event,
 903                                         bool sample_id_all __maybe_unused)
 904 {
 905         unsigned i;
 906
 907         event->thread_map.nr = bswap_64(event->thread_map.nr);
 908
 909         for (i = 0; i < event->thread_map.nr; i++)
 910                 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
 911 }
 912
 913 static void perf_event__cpu_map_swap(union perf_event *event,
 914                                      bool sample_id_all __maybe_unused)
 915 {
 916         struct perf_record_cpu_map_data *data = &event->cpu_map.data;
 917         struct cpu_map_entries *cpus;
 918         struct perf_record_record_cpu_map *mask;
 919         unsigned i;
 920
 921         data->type = bswap_16(data->type);
 922
 923         switch (data->type) {
 924         case PERF_CPU_MAP__CPUS:
 925                 cpus = (struct cpu_map_entries *)data->data;
 926
 927                 cpus->nr = bswap_16(cpus->nr);
 928
 929                 for (i = 0; i < cpus->nr; i++)
 930                         cpus->cpu[i] = bswap_16(cpus->cpu[i]);
 931                 break;
 932         case PERF_CPU_MAP__MASK:
 933                 mask = (struct perf_record_record_cpu_map *)data->data;
 934
 935                 mask->nr = bswap_16(mask->nr);
 936                 mask->long_size = bswap_16(mask->long_size);
 937
 938                 switch (mask->long_size) {
 939                 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
 940                 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
 941                 default:
 942                         pr_err("cpu_map swap: unsupported long size\n");
 943                 }
 944         default:
 945                 break;
 946         }
 947 }
 948
 949 static void perf_event__stat_config_swap(union perf_event *event,
 950                                          bool sample_id_all __maybe_unused)
 951 {
 952         u64 size;
 953
 954         size  = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]);
 955         size += 1; /* nr item itself */
 956         mem_bswap_64(&event->stat_config.nr, size);
 957 }
 958
 959 static void perf_event__stat_swap(union perf_event *event,
 960                                   bool sample_id_all __maybe_unused)
 961 {
 962         event->stat.id     = bswap_64(event->stat.id);
 963         event->stat.thread = bswap_32(event->stat.thread);
 964         event->stat.cpu    = bswap_32(event->stat.cpu);
 965         event->stat.val    = bswap_64(event->stat.val);
 966         event->stat.ena    = bswap_64(event->stat.ena);
 967         event->stat.run    = bswap_64(event->stat.run);
 968 }
 969
 970 static void perf_event__stat_round_swap(union perf_event *event,
 971                                         bool sample_id_all __maybe_unused)
 972 {
 973         event->stat_round.type = bswap_64(event->stat_round.type);
 974         event->stat_round.time = bswap_64(event->stat_round.time);
 975 }
 976
 977 static void perf_event__time_conv_swap(union perf_event *event,
 978                                        bool sample_id_all __maybe_unused)
 979 {
 980         event->time_conv.time_shift = bswap_64(event->time_conv.time_shift);
 981         event->time_conv.time_mult  = bswap_64(event->time_conv.time_mult);
 982         event->time_conv.time_zero  = bswap_64(event->time_conv.time_zero);
 983
 984         if (event_contains(event->time_conv, time_cycles)) {
 985                 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles);
 986                 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask);
 987         }
 988 }
 989
 990 typedef void (*perf_event__swap_op)(union perf_event *event,
 991                                     bool sample_id_all);
 992
 993 static perf_event__swap_op perf_event__swap_ops[] = {
 994         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 995         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 996         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 997         [PERF_RECORD_FORK]                = perf_event__task_swap,
 998         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 999         [PERF_RECORD_LOST]                = perf_event__all64_swap,
1000         [PERF_RECORD_READ]                = perf_event__read_swap,
1001         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
1002         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
1003         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
1004         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
1005         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
1006         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
1007         [PERF_RECORD_SWITCH]              = perf_event__switch_swap,
1008         [PERF_RECORD_SWITCH_CPU_WIDE]     = perf_event__switch_swap,
1009         [PERF_RECORD_NAMESPACES]          = perf_event__namespaces_swap,
1010         [PERF_RECORD_CGROUP]              = perf_event__cgroup_swap,
1011         [PERF_RECORD_TEXT_POKE]           = perf_event__text_poke_swap,
1012         [PERF_RECORD_AUX_OUTPUT_HW_ID]    = perf_event__all64_swap,
1013         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
1014         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
1015         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
1016         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
1017         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
1018         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
1019         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
1020         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
1021         [PERF_RECORD_THREAD_MAP]          = perf_event__thread_map_swap,
1022         [PERF_RECORD_CPU_MAP]             = perf_event__cpu_map_swap,
1023         [PERF_RECORD_STAT_CONFIG]         = perf_event__stat_config_swap,
1024         [PERF_RECORD_STAT]                = perf_event__stat_swap,
1025         [PERF_RECORD_STAT_ROUND]          = perf_event__stat_round_swap,
1026         [PERF_RECORD_EVENT_UPDATE]        = perf_event__event_update_swap,
1027         [PERF_RECORD_TIME_CONV]           = perf_event__time_conv_swap,
1028         [PERF_RECORD_HEADER_MAX]          = NULL,
1029 };
1030
1031 /*
1032  * When perf record finishes a pass on every buffers, it records this pseudo
1033  * event.
1034  * We record the max timestamp t found in the pass n.
1035  * Assuming these timestamps are monotonic across cpus, we know that if
1036  * a buffer still has events with timestamps below t, they will be all
1037  * available and then read in the pass n + 1.
1038  * Hence when we start to read the pass n + 2, we can safely flush every
1039  * events with timestamps below t.
1040  *
1041  *    ============ PASS n =================
1042  *       CPU 0         |   CPU 1
1043  *                     |
1044  *    cnt1 timestamps  |   cnt2 timestamps
1045  *          1          |         2
1046  *          2          |         3
1047  *          -          |         4  <--- max recorded
1048  *
1049  *    ============ PASS n + 1 ==============
1050  *       CPU 0         |   CPU 1
1051  *                     |
1052  *    cnt1 timestamps  |   cnt2 timestamps
1053  *          3          |         5
1054  *          4          |         6
1055  *          5          |         7 <---- max recorded
1056  *
1057  *      Flush every events below timestamp 4
1058  *
1059  *    ============ PASS n + 2 ==============
1060  *       CPU 0         |   CPU 1
1061  *                     |
1062  *    cnt1 timestamps  |   cnt2 timestamps
1063  *          6          |         8
1064  *          7          |         9
1065  *          -          |         10
1066  *
1067  *      Flush every events below timestamp 7
1068  *      etc...
1069  */
1070 static int process_finished_round(struct perf_tool *tool __maybe_unused,
1071                                   union perf_event *event __maybe_unused,
1072                                   struct ordered_events *oe)
1073 {
1074         if (dump_trace)
1075                 fprintf(stdout, "\n");
1076         return ordered_events__flush(oe, OE_FLUSH__ROUND);
1077 }
1078
1079 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
1080                               u64 timestamp, u64 file_offset, const char *file_path)
1081 {
1082         return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset, file_path);
1083 }
1084
1085 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
1086 {
1087         struct ip_callchain *callchain = sample->callchain;
1088         struct branch_stack *lbr_stack = sample->branch_stack;
1089         struct branch_entry *entries = perf_sample__branch_entries(sample);
1090         u64 kernel_callchain_nr = callchain->nr;
1091         unsigned int i;
1092
1093         for (i = 0; i < kernel_callchain_nr; i++) {
1094                 if (callchain->ips[i] == PERF_CONTEXT_USER)
1095                         break;
1096         }
1097
1098         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
1099                 u64 total_nr;
1100                 /*
1101                  * LBR callstack can only get user call chain,
1102                  * i is kernel call chain number,
1103                  * 1 is PERF_CONTEXT_USER.
1104                  *
1105                  * The user call chain is stored in LBR registers.
1106                  * LBR are pair registers. The caller is stored
1107                  * in "from" register, while the callee is stored
1108                  * in "to" register.
1109                  * For example, there is a call stack
1110                  * "A"->"B"->"C"->"D".
1111                  * The LBR registers will be recorded like
1112                  * "C"->"D", "B"->"C", "A"->"B".
1113                  * So only the first "to" register and all "from"
1114                  * registers are needed to construct the whole stack.
1115                  */
1116                 total_nr = i + 1 + lbr_stack->nr + 1;
1117                 kernel_callchain_nr = i + 1;
1118
1119                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
1120
1121                 for (i = 0; i < kernel_callchain_nr; i++)
1122                         printf("..... %2d: %016" PRIx64 "\n",
1123                                i, callchain->ips[i]);
1124
1125                 printf("..... %2d: %016" PRIx64 "\n",
1126                        (int)(kernel_callchain_nr), entries[0].to);
1127                 for (i = 0; i < lbr_stack->nr; i++)
1128                         printf("..... %2d: %016" PRIx64 "\n",
1129                                (int)(i + kernel_callchain_nr + 1), entries[i].from);
1130         }
1131 }
1132
1133 static void callchain__printf(struct evsel *evsel,
1134                               struct perf_sample *sample)
1135 {
1136         unsigned int i;
1137         struct ip_callchain *callchain = sample->callchain;
1138
1139         if (evsel__has_branch_callstack(evsel))
1140                 callchain__lbr_callstack_printf(sample);
1141
1142         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
1143
1144         for (i = 0; i < callchain->nr; i++)
1145                 printf("..... %2d: %016" PRIx64 "\n",
1146                        i, callchain->ips[i]);
1147 }
1148
1149 static void branch_stack__printf(struct perf_sample *sample, bool callstack)
1150 {
1151         struct branch_entry *entries = perf_sample__branch_entries(sample);
1152         uint64_t i;
1153
1154         if (!callstack) {
1155                 printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr);
1156         } else {
1157                 /* the reason of adding 1 to nr is because after expanding
1158                  * branch stack it generates nr + 1 callstack records. e.g.,
1159                  *         B()->C()
1160                  *         A()->B()
1161                  * the final callstack should be:
1162                  *         C()
1163                  *         B()
1164                  *         A()
1165                  */
1166                 printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1);
1167         }
1168
1169         for (i = 0; i < sample->branch_stack->nr; i++) {
1170                 struct branch_entry *e = &entries[i];
1171
1172                 if (!callstack) {
1173                         printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s\n",
1174                                 i, e->from, e->to,
1175                                 (unsigned short)e->flags.cycles,
1176                                 e->flags.mispred ? "M" : " ",
1177                                 e->flags.predicted ? "P" : " ",
1178                                 e->flags.abort ? "A" : " ",
1179                                 e->flags.in_tx ? "T" : " ",
1180                                 (unsigned)e->flags.reserved,
1181                                 e->flags.type ? branch_type_name(e->flags.type) : "");
1182                 } else {
1183                         if (i == 0) {
1184                                 printf("..... %2"PRIu64": %016" PRIx64 "\n"
1185                                        "..... %2"PRIu64": %016" PRIx64 "\n",
1186                                                 i, e->to, i+1, e->from);
1187                         } else {
1188                                 printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from);
1189                         }
1190                 }
1191         }
1192 }
1193
1194 static void regs_dump__printf(u64 mask, u64 *regs, const char *arch)
1195 {
1196         unsigned rid, i = 0;
1197
1198         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1199                 u64 val = regs[i++];
1200
1201                 printf(".... %-5s 0x%016" PRIx64 "\n",
1202                        perf_reg_name(rid, arch), val);
1203         }
1204 }
1205
1206 static const char *regs_abi[] = {
1207         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
1208         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1209         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1210 };
1211
1212 static inline const char *regs_dump_abi(struct regs_dump *d)
1213 {
1214         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1215                 return "unknown";
1216
1217         return regs_abi[d->abi];
1218 }
1219
1220 static void regs__printf(const char *type, struct regs_dump *regs, const char *arch)
1221 {
1222         u64 mask = regs->mask;
1223
1224         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1225                type,
1226                mask,
1227                regs_dump_abi(regs));
1228
1229         regs_dump__printf(mask, regs->regs, arch);
1230 }
1231
1232 static void regs_user__printf(struct perf_sample *sample, const char *arch)
1233 {
1234         struct regs_dump *user_regs = &sample->user_regs;
1235
1236         if (user_regs->regs)
1237                 regs__printf("user", user_regs, arch);
1238 }
1239
1240 static void regs_intr__printf(struct perf_sample *sample, const char *arch)
1241 {
1242         struct regs_dump *intr_regs = &sample->intr_regs;
1243
1244         if (intr_regs->regs)
1245                 regs__printf("intr", intr_regs, arch);
1246 }
1247
1248 static void stack_user__printf(struct stack_dump *dump)
1249 {
1250         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1251                dump->size, dump->offset);
1252 }
1253
1254 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
1255 {
1256         u64 sample_type = __evlist__combined_sample_type(evlist);
1257
1258         if (event->header.type != PERF_RECORD_SAMPLE &&
1259             !evlist__sample_id_all(evlist)) {
1260                 fputs("-1 -1 ", stdout);
1261                 return;
1262         }
1263
1264         if ((sample_type & PERF_SAMPLE_CPU))
1265                 printf("%u ", sample->cpu);
1266
1267         if (sample_type & PERF_SAMPLE_TIME)
1268                 printf("%" PRIu64 " ", sample->time);
1269 }
1270
1271 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1272 {
1273         printf("... sample_read:\n");
1274
1275         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1276                 printf("...... time enabled %016" PRIx64 "\n",
1277                        sample->read.time_enabled);
1278
1279         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1280                 printf("...... time running %016" PRIx64 "\n",
1281                        sample->read.time_running);
1282
1283         if (read_format & PERF_FORMAT_GROUP) {
1284                 u64 i;
1285
1286                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1287
1288                 for (i = 0; i < sample->read.group.nr; i++) {
1289                         struct sample_read_value *value;
1290
1291                         value = &sample->read.group.values[i];
1292                         printf("..... id %016" PRIx64
1293                                ", value %016" PRIx64 "\n",
1294                                value->id, value->value);
1295                 }
1296         } else
1297                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1298                         sample->read.one.id, sample->read.one.value);
1299 }
1300
1301 static void dump_event(struct evlist *evlist, union perf_event *event,
1302                        u64 file_offset, struct perf_sample *sample,
1303                        const char *file_path)
1304 {
1305         if (!dump_trace)
1306                 return;
1307
1308         printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n",
1309                file_offset, file_path, event->header.size, event->header.type);
1310
1311         trace_event(event);
1312         if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1313                 evlist->trace_event_sample_raw(evlist, event, sample);
1314
1315         if (sample)
1316                 evlist__print_tstamp(evlist, event, sample);
1317
1318         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1319                event->header.size, perf_event__name(event->header.type));
1320 }
1321
1322 char *get_page_size_name(u64 size, char *str)
1323 {
1324         if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size))
1325                 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A");
1326
1327         return str;
1328 }
1329
1330 static void dump_sample(struct evsel *evsel, union perf_event *event,
1331                         struct perf_sample *sample, const char *arch)
1332 {
1333         u64 sample_type;
1334         char str[PAGE_SIZE_NAME_LEN];
1335
1336         if (!dump_trace)
1337                 return;
1338
1339         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1340                event->header.misc, sample->pid, sample->tid, sample->ip,
1341                sample->period, sample->addr);
1342
1343         sample_type = evsel->core.attr.sample_type;
1344
1345         if (evsel__has_callchain(evsel))
1346                 callchain__printf(evsel, sample);
1347
1348         if (evsel__has_br_stack(evsel))
1349                 branch_stack__printf(sample, evsel__has_branch_callstack(evsel));
1350
1351         if (sample_type & PERF_SAMPLE_REGS_USER)
1352                 regs_user__printf(sample, arch);
1353
1354         if (sample_type & PERF_SAMPLE_REGS_INTR)
1355                 regs_intr__printf(sample, arch);
1356
1357         if (sample_type & PERF_SAMPLE_STACK_USER)
1358                 stack_user__printf(&sample->user_stack);
1359
1360         if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) {
1361                 printf("... weight: %" PRIu64 "", sample->weight);
1362                         if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) {
1363                                 printf(",0x%"PRIx16"", sample->ins_lat);
1364                                 printf(",0x%"PRIx16"", sample->p_stage_cyc);
1365                         }
1366                 printf("\n");
1367         }
1368
1369         if (sample_type & PERF_SAMPLE_DATA_SRC)
1370                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1371
1372         if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1373                 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1374
1375         if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
1376                 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str));
1377
1378         if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
1379                 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str));
1380
1381         if (sample_type & PERF_SAMPLE_TRANSACTION)
1382                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1383
1384         if (sample_type & PERF_SAMPLE_READ)
1385                 sample_read__printf(sample, evsel->core.attr.read_format);
1386 }
1387
1388 static void dump_read(struct evsel *evsel, union perf_event *event)
1389 {
1390         struct perf_record_read *read_event = &event->read;
1391         u64 read_format;
1392
1393         if (!dump_trace)
1394                 return;
1395
1396         printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1397                evsel__name(evsel), event->read.value);
1398
1399         if (!evsel)
1400                 return;
1401
1402         read_format = evsel->core.attr.read_format;
1403
1404         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1405                 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1406
1407         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1408                 printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1409
1410         if (read_format & PERF_FORMAT_ID)
1411                 printf("... id           : %" PRI_lu64 "\n", read_event->id);
1412 }
1413
1414 static struct machine *machines__find_for_cpumode(struct machines *machines,
1415                                                union perf_event *event,
1416                                                struct perf_sample *sample)
1417 {
1418         if (perf_guest &&
1419             ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1420              (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1421                 u32 pid;
1422
1423                 if (event->header.type == PERF_RECORD_MMAP
1424                     || event->header.type == PERF_RECORD_MMAP2)
1425                         pid = event->mmap.pid;
1426                 else
1427                         pid = sample->pid;
1428
1429                 /*
1430                  * Guest code machine is created as needed and does not use
1431                  * DEFAULT_GUEST_KERNEL_ID.
1432                  */
1433                 if (symbol_conf.guest_code)
1434                         return machines__findnew(machines, pid);
1435
1436                 return machines__find_guest(machines, pid);
1437         }
1438
1439         return &machines->host;
1440 }
1441
1442 static int deliver_sample_value(struct evlist *evlist,
1443                                 struct perf_tool *tool,
1444                                 union perf_event *event,
1445                                 struct perf_sample *sample,
1446                                 struct sample_read_value *v,
1447                                 struct machine *machine)
1448 {
1449         struct perf_sample_id *sid = evlist__id2sid(evlist, v->id);
1450         struct evsel *evsel;
1451
1452         if (sid) {
1453                 sample->id     = v->id;
1454                 sample->period = v->value - sid->period;
1455                 sid->period    = v->value;
1456         }
1457
1458         if (!sid || sid->evsel == NULL) {
1459                 ++evlist->stats.nr_unknown_id;
1460                 return 0;
1461         }
1462
1463         /*
1464          * There's no reason to deliver sample
1465          * for zero period, bail out.
1466          */
1467         if (!sample->period)
1468                 return 0;
1469
1470         evsel = container_of(sid->evsel, struct evsel, core);
1471         return tool->sample(tool, event, sample, evsel, machine);
1472 }
1473
1474 static int deliver_sample_group(struct evlist *evlist,
1475                                 struct perf_tool *tool,
1476                                 union  perf_event *event,
1477                                 struct perf_sample *sample,
1478                                 struct machine *machine)
1479 {
1480         int ret = -EINVAL;
1481         u64 i;
1482
1483         for (i = 0; i < sample->read.group.nr; i++) {
1484                 ret = deliver_sample_value(evlist, tool, event, sample,
1485                                            &sample->read.group.values[i],
1486                                            machine);
1487                 if (ret)
1488                         break;
1489         }
1490
1491         return ret;
1492 }
1493
1494 static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool,
1495                                   union  perf_event *event, struct perf_sample *sample,
1496                                   struct evsel *evsel, struct machine *machine)
1497 {
1498         /* We know evsel != NULL. */
1499         u64 sample_type = evsel->core.attr.sample_type;
1500         u64 read_format = evsel->core.attr.read_format;
1501
1502         /* Standard sample delivery. */
1503         if (!(sample_type & PERF_SAMPLE_READ))
1504                 return tool->sample(tool, event, sample, evsel, machine);
1505
1506         /* For PERF_SAMPLE_READ we have either single or group mode. */
1507         if (read_format & PERF_FORMAT_GROUP)
1508                 return deliver_sample_group(evlist, tool, event, sample,
1509                                             machine);
1510         else
1511                 return deliver_sample_value(evlist, tool, event, sample,
1512                                             &sample->read.one, machine);
1513 }
1514
1515 static int machines__deliver_event(struct machines *machines,
1516                                    struct evlist *evlist,
1517                                    union perf_event *event,
1518                                    struct perf_sample *sample,
1519                                    struct perf_tool *tool, u64 file_offset,
1520                                    const char *file_path)
1521 {
1522         struct evsel *evsel;
1523         struct machine *machine;
1524
1525         dump_event(evlist, event, file_offset, sample, file_path);
1526
1527         evsel = evlist__id2evsel(evlist, sample->id);
1528
1529         machine = machines__find_for_cpumode(machines, event, sample);
1530
1531         switch (event->header.type) {
1532         case PERF_RECORD_SAMPLE:
1533                 if (evsel == NULL) {
1534                         ++evlist->stats.nr_unknown_id;
1535                         return 0;
1536                 }
1537                 if (machine == NULL) {
1538                         ++evlist->stats.nr_unprocessable_samples;
1539                         dump_sample(evsel, event, sample, perf_env__arch(NULL));
1540                         return 0;
1541                 }
1542                 dump_sample(evsel, event, sample, perf_env__arch(machine->env));
1543                 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1544         case PERF_RECORD_MMAP:
1545                 return tool->mmap(tool, event, sample, machine);
1546         case PERF_RECORD_MMAP2:
1547                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1548                         ++evlist->stats.nr_proc_map_timeout;
1549                 return tool->mmap2(tool, event, sample, machine);
1550         case PERF_RECORD_COMM:
1551                 return tool->comm(tool, event, sample, machine);
1552         case PERF_RECORD_NAMESPACES:
1553                 return tool->namespaces(tool, event, sample, machine);
1554         case PERF_RECORD_CGROUP:
1555                 return tool->cgroup(tool, event, sample, machine);
1556         case PERF_RECORD_FORK:
1557                 return tool->fork(tool, event, sample, machine);
1558         case PERF_RECORD_EXIT:
1559                 return tool->exit(tool, event, sample, machine);
1560         case PERF_RECORD_LOST:
1561                 if (tool->lost == perf_event__process_lost)
1562                         evlist->stats.total_lost += event->lost.lost;
1563                 return tool->lost(tool, event, sample, machine);
1564         case PERF_RECORD_LOST_SAMPLES:
1565                 if (tool->lost_samples == perf_event__process_lost_samples)
1566                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1567                 return tool->lost_samples(tool, event, sample, machine);
1568         case PERF_RECORD_READ:
1569                 dump_read(evsel, event);
1570                 return tool->read(tool, event, sample, evsel, machine);
1571         case PERF_RECORD_THROTTLE:
1572                 return tool->throttle(tool, event, sample, machine);
1573         case PERF_RECORD_UNTHROTTLE:
1574                 return tool->unthrottle(tool, event, sample, machine);
1575         case PERF_RECORD_AUX:
1576                 if (tool->aux == perf_event__process_aux) {
1577                         if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1578                                 evlist->stats.total_aux_lost += 1;
1579                         if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1580                                 evlist->stats.total_aux_partial += 1;
1581                         if (event->aux.flags & PERF_AUX_FLAG_COLLISION)
1582                                 evlist->stats.total_aux_collision += 1;
1583                 }
1584                 return tool->aux(tool, event, sample, machine);
1585         case PERF_RECORD_ITRACE_START:
1586                 return tool->itrace_start(tool, event, sample, machine);
1587         case PERF_RECORD_SWITCH:
1588         case PERF_RECORD_SWITCH_CPU_WIDE:
1589                 return tool->context_switch(tool, event, sample, machine);
1590         case PERF_RECORD_KSYMBOL:
1591                 return tool->ksymbol(tool, event, sample, machine);
1592         case PERF_RECORD_BPF_EVENT:
1593                 return tool->bpf(tool, event, sample, machine);
1594         case PERF_RECORD_TEXT_POKE:
1595                 return tool->text_poke(tool, event, sample, machine);
1596         case PERF_RECORD_AUX_OUTPUT_HW_ID:
1597                 return tool->aux_output_hw_id(tool, event, sample, machine);
1598         default:
1599                 ++evlist->stats.nr_unknown_events;
1600                 return -1;
1601         }
1602 }
1603
1604 static int perf_session__deliver_event(struct perf_session *session,
1605                                        union perf_event *event,
1606                                        struct perf_tool *tool,
1607                                        u64 file_offset,
1608                                        const char *file_path)
1609 {
1610         struct perf_sample sample;
1611         int ret = evlist__parse_sample(session->evlist, event, &sample);
1612
1613         if (ret) {
1614                 pr_err("Can't parse sample, err = %d\n", ret);
1615                 return ret;
1616         }
1617
1618         ret = auxtrace__process_event(session, event, &sample, tool);
1619         if (ret < 0)
1620                 return ret;
1621         if (ret > 0)
1622                 return 0;
1623
1624         ret = machines__deliver_event(&session->machines, session->evlist,
1625                                       event, &sample, tool, file_offset, file_path);
1626
1627         if (dump_trace && sample.aux_sample.size)
1628                 auxtrace__dump_auxtrace_sample(session, &sample);
1629
1630         return ret;
1631 }
1632
1633 static s64 perf_session__process_user_event(struct perf_session *session,
1634                                             union perf_event *event,
1635                                             u64 file_offset,
1636                                             const char *file_path)
1637 {
1638         struct ordered_events *oe = &session->ordered_events;
1639         struct perf_tool *tool = session->tool;
1640         struct perf_sample sample = { .time = 0, };
1641         int fd = perf_data__fd(session->data);
1642         int err;
1643
1644         if (event->header.type != PERF_RECORD_COMPRESSED ||
1645             tool->compressed == perf_session__process_compressed_event_stub)
1646                 dump_event(session->evlist, event, file_offset, &sample, file_path);
1647
1648         /* These events are processed right away */
1649         switch (event->header.type) {
1650         case PERF_RECORD_HEADER_ATTR:
1651                 err = tool->attr(tool, event, &session->evlist);
1652                 if (err == 0) {
1653                         perf_session__set_id_hdr_size(session);
1654                         perf_session__set_comm_exec(session);
1655                 }
1656                 return err;
1657         case PERF_RECORD_EVENT_UPDATE:
1658                 return tool->event_update(tool, event, &session->evlist);
1659         case PERF_RECORD_HEADER_EVENT_TYPE:
1660                 /*
1661                  * Deprecated, but we need to handle it for sake
1662                  * of old data files create in pipe mode.
1663                  */
1664                 return 0;
1665         case PERF_RECORD_HEADER_TRACING_DATA:
1666                 /*
1667                  * Setup for reading amidst mmap, but only when we
1668                  * are in 'file' mode. The 'pipe' fd is in proper
1669                  * place already.
1670                  */
1671                 if (!perf_data__is_pipe(session->data))
1672                         lseek(fd, file_offset, SEEK_SET);
1673                 return tool->tracing_data(session, event);
1674         case PERF_RECORD_HEADER_BUILD_ID:
1675                 return tool->build_id(session, event);
1676         case PERF_RECORD_FINISHED_ROUND:
1677                 return tool->finished_round(tool, event, oe);
1678         case PERF_RECORD_ID_INDEX:
1679                 return tool->id_index(session, event);
1680         case PERF_RECORD_AUXTRACE_INFO:
1681                 return tool->auxtrace_info(session, event);
1682         case PERF_RECORD_AUXTRACE:
1683                 /* setup for reading amidst mmap */
1684                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1685                 return tool->auxtrace(session, event);
1686         case PERF_RECORD_AUXTRACE_ERROR:
1687                 perf_session__auxtrace_error_inc(session, event);
1688                 return tool->auxtrace_error(session, event);
1689         case PERF_RECORD_THREAD_MAP:
1690                 return tool->thread_map(session, event);
1691         case PERF_RECORD_CPU_MAP:
1692                 return tool->cpu_map(session, event);
1693         case PERF_RECORD_STAT_CONFIG:
1694                 return tool->stat_config(session, event);
1695         case PERF_RECORD_STAT:
1696                 return tool->stat(session, event);
1697         case PERF_RECORD_STAT_ROUND:
1698                 return tool->stat_round(session, event);
1699         case PERF_RECORD_TIME_CONV:
1700                 session->time_conv = event->time_conv;
1701                 return tool->time_conv(session, event);
1702         case PERF_RECORD_HEADER_FEATURE:
1703                 return tool->feature(session, event);
1704         case PERF_RECORD_COMPRESSED:
1705                 err = tool->compressed(session, event, file_offset, file_path);
1706                 if (err)
1707                         dump_event(session->evlist, event, file_offset, &sample, file_path);
1708                 return err;
1709         default:
1710                 return -EINVAL;
1711         }
1712 }
1713
1714 int perf_session__deliver_synth_event(struct perf_session *session,
1715                                       union perf_event *event,
1716                                       struct perf_sample *sample)
1717 {
1718         struct evlist *evlist = session->evlist;
1719         struct perf_tool *tool = session->tool;
1720
1721         events_stats__inc(&evlist->stats, event->header.type);
1722
1723         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1724                 return perf_session__process_user_event(session, event, 0, NULL);
1725
1726         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL);
1727 }
1728
1729 static void event_swap(union perf_event *event, bool sample_id_all)
1730 {
1731         perf_event__swap_op swap;
1732
1733         swap = perf_event__swap_ops[event->header.type];
1734         if (swap)
1735                 swap(event, sample_id_all);
1736 }
1737
1738 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1739                              void *buf, size_t buf_sz,
1740                              union perf_event **event_ptr,
1741                              struct perf_sample *sample)
1742 {
1743         union perf_event *event;
1744         size_t hdr_sz, rest;
1745         int fd;
1746
1747         if (session->one_mmap && !session->header.needs_swap) {
1748                 event = file_offset - session->one_mmap_offset +
1749                         session->one_mmap_addr;
1750                 goto out_parse_sample;
1751         }
1752
1753         if (perf_data__is_pipe(session->data))
1754                 return -1;
1755
1756         fd = perf_data__fd(session->data);
1757         hdr_sz = sizeof(struct perf_event_header);
1758
1759         if (buf_sz < hdr_sz)
1760                 return -1;
1761
1762         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1763             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1764                 return -1;
1765
1766         event = (union perf_event *)buf;
1767
1768         if (session->header.needs_swap)
1769                 perf_event_header__bswap(&event->header);
1770
1771         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1772                 return -1;
1773
1774         buf += hdr_sz;
1775         rest = event->header.size - hdr_sz;
1776
1777         if (readn(fd, buf, rest) != (ssize_t)rest)
1778                 return -1;
1779
1780         if (session->header.needs_swap)
1781                 event_swap(event, evlist__sample_id_all(session->evlist));
1782
1783 out_parse_sample:
1784
1785         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1786             evlist__parse_sample(session->evlist, event, sample))
1787                 return -1;
1788
1789         *event_ptr = event;
1790
1791         return 0;
1792 }
1793
1794 int perf_session__peek_events(struct perf_session *session, u64 offset,
1795                               u64 size, peek_events_cb_t cb, void *data)
1796 {
1797         u64 max_offset = offset + size;
1798         char buf[PERF_SAMPLE_MAX_SIZE];
1799         union perf_event *event;
1800         int err;
1801
1802         do {
1803                 err = perf_session__peek_event(session, offset, buf,
1804                                                PERF_SAMPLE_MAX_SIZE, &event,
1805                                                NULL);
1806                 if (err)
1807                         return err;
1808
1809                 err = cb(session, event, offset, data);
1810                 if (err)
1811                         return err;
1812
1813                 offset += event->header.size;
1814                 if (event->header.type == PERF_RECORD_AUXTRACE)
1815                         offset += event->auxtrace.size;
1816
1817         } while (offset < max_offset);
1818
1819         return err;
1820 }
1821
1822 static s64 perf_session__process_event(struct perf_session *session,
1823                                        union perf_event *event, u64 file_offset,
1824                                        const char *file_path)
1825 {
1826         struct evlist *evlist = session->evlist;
1827         struct perf_tool *tool = session->tool;
1828         int ret;
1829
1830         if (session->header.needs_swap)
1831                 event_swap(event, evlist__sample_id_all(evlist));
1832
1833         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1834                 return -EINVAL;
1835
1836         events_stats__inc(&evlist->stats, event->header.type);
1837
1838         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1839                 return perf_session__process_user_event(session, event, file_offset, file_path);
1840
1841         if (tool->ordered_events) {
1842                 u64 timestamp = -1ULL;
1843
1844                 ret = evlist__parse_sample_timestamp(evlist, event, &timestamp);
1845                 if (ret && ret != -1)
1846                         return ret;
1847
1848                 ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path);
1849                 if (ret != -ETIME)
1850                         return ret;
1851         }
1852
1853         return perf_session__deliver_event(session, event, tool, file_offset, file_path);
1854 }
1855
1856 void perf_event_header__bswap(struct perf_event_header *hdr)
1857 {
1858         hdr->type = bswap_32(hdr->type);
1859         hdr->misc = bswap_16(hdr->misc);
1860         hdr->size = bswap_16(hdr->size);
1861 }
1862
1863 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1864 {
1865         return machine__findnew_thread(&session->machines.host, -1, pid);
1866 }
1867
1868 int perf_session__register_idle_thread(struct perf_session *session)
1869 {
1870         struct thread *thread = machine__idle_thread(&session->machines.host);
1871
1872         /* machine__idle_thread() got the thread, so put it */
1873         thread__put(thread);
1874         return thread ? 0 : -1;
1875 }
1876
1877 static void
1878 perf_session__warn_order(const struct perf_session *session)
1879 {
1880         const struct ordered_events *oe = &session->ordered_events;
1881         struct evsel *evsel;
1882         bool should_warn = true;
1883
1884         evlist__for_each_entry(session->evlist, evsel) {
1885                 if (evsel->core.attr.write_backward)
1886                         should_warn = false;
1887         }
1888
1889         if (!should_warn)
1890                 return;
1891         if (oe->nr_unordered_events != 0)
1892                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1893 }
1894
1895 static void perf_session__warn_about_errors(const struct perf_session *session)
1896 {
1897         const struct events_stats *stats = &session->evlist->stats;
1898
1899         if (session->tool->lost == perf_event__process_lost &&
1900             stats->nr_events[PERF_RECORD_LOST] != 0) {
1901                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1902                             "Check IO/CPU overload!\n\n",
1903                             stats->nr_events[0],
1904                             stats->nr_events[PERF_RECORD_LOST]);
1905         }
1906
1907         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1908                 double drop_rate;
1909
1910                 drop_rate = (double)stats->total_lost_samples /
1911                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1912                 if (drop_rate > 0.05) {
1913                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1914                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1915                                     drop_rate * 100.0);
1916                 }
1917         }
1918
1919         if (session->tool->aux == perf_event__process_aux &&
1920             stats->total_aux_lost != 0) {
1921                 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1922                             stats->total_aux_lost,
1923                             stats->nr_events[PERF_RECORD_AUX]);
1924         }
1925
1926         if (session->tool->aux == perf_event__process_aux &&
1927             stats->total_aux_partial != 0) {
1928                 bool vmm_exclusive = false;
1929
1930                 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1931                                        &vmm_exclusive);
1932
1933                 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1934                             "Are you running a KVM guest in the background?%s\n\n",
1935                             stats->total_aux_partial,
1936                             stats->nr_events[PERF_RECORD_AUX],
1937                             vmm_exclusive ?
1938                             "\nReloading kvm_intel module with vmm_exclusive=0\n"
1939                             "will reduce the gaps to only guest's timeslices." :
1940                             "");
1941         }
1942
1943         if (session->tool->aux == perf_event__process_aux &&
1944             stats->total_aux_collision != 0) {
1945                 ui__warning("AUX data detected collision  %" PRIu64 " times out of %u!\n\n",
1946                             stats->total_aux_collision,
1947                             stats->nr_events[PERF_RECORD_AUX]);
1948         }
1949
1950         if (stats->nr_unknown_events != 0) {
1951                 ui__warning("Found %u unknown events!\n\n"
1952                             "Is this an older tool processing a perf.data "
1953                             "file generated by a more recent tool?\n\n"
1954                             "If that is not the case, consider "
1955                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1956                             stats->nr_unknown_events);
1957         }
1958
1959         if (stats->nr_unknown_id != 0) {
1960                 ui__warning("%u samples with id not present in the header\n",
1961                             stats->nr_unknown_id);
1962         }
1963
1964         if (stats->nr_invalid_chains != 0) {
1965                 ui__warning("Found invalid callchains!\n\n"
1966                             "%u out of %u events were discarded for this reason.\n\n"
1967                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1968                             stats->nr_invalid_chains,
1969                             stats->nr_events[PERF_RECORD_SAMPLE]);
1970         }
1971
1972         if (stats->nr_unprocessable_samples != 0) {
1973                 ui__warning("%u unprocessable samples recorded.\n"
1974                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1975                             stats->nr_unprocessable_samples);
1976         }
1977
1978         perf_session__warn_order(session);
1979
1980         events_stats__auxtrace_error_warn(stats);
1981
1982         if (stats->nr_proc_map_timeout != 0) {
1983                 ui__warning("%d map information files for pre-existing threads were\n"
1984                             "not processed, if there are samples for addresses they\n"
1985                             "will not be resolved, you may find out which are these\n"
1986                             "threads by running with -v and redirecting the output\n"
1987                             "to a file.\n"
1988                             "The time limit to process proc map is too short?\n"
1989                             "Increase it by --proc-map-timeout\n",
1990                             stats->nr_proc_map_timeout);
1991         }
1992 }
1993
1994 static int perf_session__flush_thread_stack(struct thread *thread,
1995                                             void *p __maybe_unused)
1996 {
1997         return thread_stack__flush(thread);
1998 }
1999
2000 static int perf_session__flush_thread_stacks(struct perf_session *session)
2001 {
2002         return machines__for_each_thread(&session->machines,
2003                                          perf_session__flush_thread_stack,
2004                                          NULL);
2005 }
2006
2007 volatile int session_done;
2008
2009 static int __perf_session__process_decomp_events(struct perf_session *session);
2010
2011 static int __perf_session__process_pipe_events(struct perf_session *session)
2012 {
2013         struct ordered_events *oe = &session->ordered_events;
2014         struct perf_tool *tool = session->tool;
2015         union perf_event *event;
2016         uint32_t size, cur_size = 0;
2017         void *buf = NULL;
2018         s64 skip = 0;
2019         u64 head;
2020         ssize_t err;
2021         void *p;
2022
2023         perf_tool__fill_defaults(tool);
2024
2025         head = 0;
2026         cur_size = sizeof(union perf_event);
2027
2028         buf = malloc(cur_size);
2029         if (!buf)
2030                 return -errno;
2031         ordered_events__set_copy_on_queue(oe, true);
2032 more:
2033         event = buf;
2034         err = perf_data__read(session->data, event,
2035                               sizeof(struct perf_event_header));
2036         if (err <= 0) {
2037                 if (err == 0)
2038                         goto done;
2039
2040                 pr_err("failed to read event header\n");
2041                 goto out_err;
2042         }
2043
2044         if (session->header.needs_swap)
2045                 perf_event_header__bswap(&event->header);
2046
2047         size = event->header.size;
2048         if (size < sizeof(struct perf_event_header)) {
2049                 pr_err("bad event header size\n");
2050                 goto out_err;
2051         }
2052
2053         if (size > cur_size) {
2054                 void *new = realloc(buf, size);
2055                 if (!new) {
2056                         pr_err("failed to allocate memory to read event\n");
2057                         goto out_err;
2058                 }
2059                 buf = new;
2060                 cur_size = size;
2061                 event = buf;
2062         }
2063         p = event;
2064         p += sizeof(struct perf_event_header);
2065
2066         if (size - sizeof(struct perf_event_header)) {
2067                 err = perf_data__read(session->data, p,
2068                                       size - sizeof(struct perf_event_header));
2069                 if (err <= 0) {
2070                         if (err == 0) {
2071                                 pr_err("unexpected end of event stream\n");
2072                                 goto done;
2073                         }
2074
2075                         pr_err("failed to read event data\n");
2076                         goto out_err;
2077                 }
2078         }
2079
2080         if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) {
2081                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2082                        head, event->header.size, event->header.type);
2083                 err = -EINVAL;
2084                 goto out_err;
2085         }
2086
2087         head += size;
2088
2089         if (skip > 0)
2090                 head += skip;
2091
2092         err = __perf_session__process_decomp_events(session);
2093         if (err)
2094                 goto out_err;
2095
2096         if (!session_done())
2097                 goto more;
2098 done:
2099         /* do the final flush for ordered samples */
2100         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2101         if (err)
2102                 goto out_err;
2103         err = auxtrace__flush_events(session, tool);
2104         if (err)
2105                 goto out_err;
2106         err = perf_session__flush_thread_stacks(session);
2107 out_err:
2108         free(buf);
2109         if (!tool->no_warn)
2110                 perf_session__warn_about_errors(session);
2111         ordered_events__free(&session->ordered_events);
2112         auxtrace__free_events(session);
2113         return err;
2114 }
2115
2116 static union perf_event *
2117 prefetch_event(char *buf, u64 head, size_t mmap_size,
2118                bool needs_swap, union perf_event *error)
2119 {
2120         union perf_event *event;
2121         u16 event_size;
2122
2123         /*
2124          * Ensure we have enough space remaining to read
2125          * the size of the event in the headers.
2126          */
2127         if (head + sizeof(event->header) > mmap_size)
2128                 return NULL;
2129
2130         event = (union perf_event *)(buf + head);
2131         if (needs_swap)
2132                 perf_event_header__bswap(&event->header);
2133
2134         event_size = event->header.size;
2135         if (head + event_size <= mmap_size)
2136                 return event;
2137
2138         /* We're not fetching the event so swap back again */
2139         if (needs_swap)
2140                 perf_event_header__bswap(&event->header);
2141
2142         /* Check if the event fits into the next mmapped buf. */
2143         if (event_size <= mmap_size - head % page_size) {
2144                 /* Remap buf and fetch again. */
2145                 return NULL;
2146         }
2147
2148         /* Invalid input. Event size should never exceed mmap_size. */
2149         pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:"
2150                  " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size);
2151
2152         return error;
2153 }
2154
2155 static union perf_event *
2156 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2157 {
2158         return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
2159 }
2160
2161 static union perf_event *
2162 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2163 {
2164         return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
2165 }
2166
2167 static int __perf_session__process_decomp_events(struct perf_session *session)
2168 {
2169         s64 skip;
2170         u64 size;
2171         struct decomp *decomp = session->active_decomp->decomp_last;
2172
2173         if (!decomp)
2174                 return 0;
2175
2176         while (decomp->head < decomp->size && !session_done()) {
2177                 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2178                                                              session->header.needs_swap);
2179
2180                 if (!event)
2181                         break;
2182
2183                 size = event->header.size;
2184
2185                 if (size < sizeof(struct perf_event_header) ||
2186                     (skip = perf_session__process_event(session, event, decomp->file_pos,
2187                                                         decomp->file_path)) < 0) {
2188                         pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2189                                 decomp->file_pos + decomp->head, event->header.size, event->header.type);
2190                         return -EINVAL;
2191                 }
2192
2193                 if (skip)
2194                         size += skip;
2195
2196                 decomp->head += size;
2197         }
2198
2199         return 0;
2200 }
2201
2202 /*
2203  * On 64bit we can mmap the data file in one go. No need for tiny mmap
2204  * slices. On 32bit we use 32MB.
2205  */
2206 #if BITS_PER_LONG == 64
2207 #define MMAP_SIZE ULLONG_MAX
2208 #define NUM_MMAPS 1
2209 #else
2210 #define MMAP_SIZE (32 * 1024 * 1024ULL)
2211 #define NUM_MMAPS 128
2212 #endif
2213
2214 struct reader;
2215
2216 typedef s64 (*reader_cb_t)(struct perf_session *session,
2217                            union perf_event *event,
2218                            u64 file_offset,
2219                            const char *file_path);
2220
2221 struct reader {
2222         int              fd;
2223         const char       *path;
2224         u64              data_size;
2225         u64              data_offset;
2226         reader_cb_t      process;
2227         bool             in_place_update;
2228         char             *mmaps[NUM_MMAPS];
2229         size_t           mmap_size;
2230         int              mmap_idx;
2231         char             *mmap_cur;
2232         u64              file_pos;
2233         u64              file_offset;
2234         u64              head;
2235         u64              size;
2236         bool             done;
2237         struct zstd_data   zstd_data;
2238         struct decomp_data decomp_data;
2239 };
2240
2241 static int
2242 reader__init(struct reader *rd, bool *one_mmap)
2243 {
2244         u64 data_size = rd->data_size;
2245         char **mmaps = rd->mmaps;
2246
2247         rd->head = rd->data_offset;
2248         data_size += rd->data_offset;
2249
2250         rd->mmap_size = MMAP_SIZE;
2251         if (rd->mmap_size > data_size) {
2252                 rd->mmap_size = data_size;
2253                 if (one_mmap)
2254                         *one_mmap = true;
2255         }
2256
2257         memset(mmaps, 0, sizeof(rd->mmaps));
2258
2259         if (zstd_init(&rd->zstd_data, 0))
2260                 return -1;
2261         rd->decomp_data.zstd_decomp = &rd->zstd_data;
2262
2263         return 0;
2264 }
2265
2266 static void
2267 reader__release_decomp(struct reader *rd)
2268 {
2269         perf_decomp__release_events(rd->decomp_data.decomp);
2270         zstd_fini(&rd->zstd_data);
2271 }
2272
2273 static int
2274 reader__mmap(struct reader *rd, struct perf_session *session)
2275 {
2276         int mmap_prot, mmap_flags;
2277         char *buf, **mmaps = rd->mmaps;
2278         u64 page_offset;
2279
2280         mmap_prot  = PROT_READ;
2281         mmap_flags = MAP_SHARED;
2282
2283         if (rd->in_place_update) {
2284                 mmap_prot  |= PROT_WRITE;
2285         } else if (session->header.needs_swap) {
2286                 mmap_prot  |= PROT_WRITE;
2287                 mmap_flags = MAP_PRIVATE;
2288         }
2289
2290         if (mmaps[rd->mmap_idx]) {
2291                 munmap(mmaps[rd->mmap_idx], rd->mmap_size);
2292                 mmaps[rd->mmap_idx] = NULL;
2293         }
2294
2295         page_offset = page_size * (rd->head / page_size);
2296         rd->file_offset += page_offset;
2297         rd->head -= page_offset;
2298
2299         buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd,
2300                    rd->file_offset);
2301         if (buf == MAP_FAILED) {
2302                 pr_err("failed to mmap file\n");
2303                 return -errno;
2304         }
2305         mmaps[rd->mmap_idx] = rd->mmap_cur = buf;
2306         rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1);
2307         rd->file_pos = rd->file_offset + rd->head;
2308         if (session->one_mmap) {
2309                 session->one_mmap_addr = buf;
2310                 session->one_mmap_offset = rd->file_offset;
2311         }
2312
2313         return 0;
2314 }
2315
2316 enum {
2317         READER_OK,
2318         READER_NODATA,
2319 };
2320
2321 static int
2322 reader__read_event(struct reader *rd, struct perf_session *session,
2323                    struct ui_progress *prog)
2324 {
2325         u64 size;
2326         int err = READER_OK;
2327         union perf_event *event;
2328         s64 skip;
2329
2330         event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur,
2331                                    session->header.needs_swap);
2332         if (IS_ERR(event))
2333                 return PTR_ERR(event);
2334
2335         if (!event)
2336                 return READER_NODATA;
2337
2338         size = event->header.size;
2339
2340         skip = -EINVAL;
2341
2342         if (size < sizeof(struct perf_event_header) ||
2343             (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) {
2344                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2345                        rd->file_offset + rd->head, event->header.size,
2346                        event->header.type, strerror(-skip));
2347                 err = skip;
2348                 goto out;
2349         }
2350
2351         if (skip)
2352                 size += skip;
2353
2354         rd->size += size;
2355         rd->head += size;
2356         rd->file_pos += size;
2357
2358         err = __perf_session__process_decomp_events(session);
2359         if (err)
2360                 goto out;
2361
2362         ui_progress__update(prog, size);
2363
2364 out:
2365         return err;
2366 }
2367
2368 static inline bool
2369 reader__eof(struct reader *rd)
2370 {
2371         return (rd->file_pos >= rd->data_size + rd->data_offset);
2372 }
2373
2374 static int
2375 reader__process_events(struct reader *rd, struct perf_session *session,
2376                        struct ui_progress *prog)
2377 {
2378         int err;
2379
2380         err = reader__init(rd, &session->one_mmap);
2381         if (err)
2382                 goto out;
2383
2384         session->active_decomp = &rd->decomp_data;
2385
2386 remap:
2387         err = reader__mmap(rd, session);
2388         if (err)
2389                 goto out;
2390
2391 more:
2392         err = reader__read_event(rd, session, prog);
2393         if (err < 0)
2394                 goto out;
2395         else if (err == READER_NODATA)
2396                 goto remap;
2397
2398         if (session_done())
2399                 goto out;
2400
2401         if (!reader__eof(rd))
2402                 goto more;
2403
2404 out:
2405         session->active_decomp = &session->decomp_data;
2406         return err;
2407 }
2408
2409 static s64 process_simple(struct perf_session *session,
2410                           union perf_event *event,
2411                           u64 file_offset,
2412                           const char *file_path)
2413 {
2414         return perf_session__process_event(session, event, file_offset, file_path);
2415 }
2416
2417 static int __perf_session__process_events(struct perf_session *session)
2418 {
2419         struct reader rd = {
2420                 .fd             = perf_data__fd(session->data),
2421                 .path           = session->data->file.path,
2422                 .data_size      = session->header.data_size,
2423                 .data_offset    = session->header.data_offset,
2424                 .process        = process_simple,
2425                 .in_place_update = session->data->in_place_update,
2426         };
2427         struct ordered_events *oe = &session->ordered_events;
2428         struct perf_tool *tool = session->tool;
2429         struct ui_progress prog;
2430         int err;
2431
2432         perf_tool__fill_defaults(tool);
2433
2434         if (rd.data_size == 0)
2435                 return -1;
2436
2437         ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2438
2439         err = reader__process_events(&rd, session, &prog);
2440         if (err)
2441                 goto out_err;
2442         /* do the final flush for ordered samples */
2443         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2444         if (err)
2445                 goto out_err;
2446         err = auxtrace__flush_events(session, tool);
2447         if (err)
2448                 goto out_err;
2449         err = perf_session__flush_thread_stacks(session);
2450 out_err:
2451         ui_progress__finish();
2452         if (!tool->no_warn)
2453                 perf_session__warn_about_errors(session);
2454         /*
2455          * We may switching perf.data output, make ordered_events
2456          * reusable.
2457          */
2458         ordered_events__reinit(&session->ordered_events);
2459         auxtrace__free_events(session);
2460         reader__release_decomp(&rd);
2461         session->one_mmap = false;
2462         return err;
2463 }
2464
2465 /*
2466  * Processing 2 MB of data from each reader in sequence,
2467  * because that's the way the ordered events sorting works
2468  * most efficiently.
2469  */
2470 #define READER_MAX_SIZE (2 * 1024 * 1024)
2471
2472 /*
2473  * This function reads, merge and process directory data.
2474  * It assumens the version 1 of directory data, where each
2475  * data file holds per-cpu data, already sorted by kernel.
2476  */
2477 static int __perf_session__process_dir_events(struct perf_session *session)
2478 {
2479         struct perf_data *data = session->data;
2480         struct perf_tool *tool = session->tool;
2481         int i, ret, readers, nr_readers;
2482         struct ui_progress prog;
2483         u64 total_size = perf_data__size(session->data);
2484         struct reader *rd;
2485
2486         perf_tool__fill_defaults(tool);
2487
2488         ui_progress__init_size(&prog, total_size, "Sorting events...");
2489
2490         nr_readers = 1;
2491         for (i = 0; i < data->dir.nr; i++) {
2492                 if (data->dir.files[i].size)
2493                         nr_readers++;
2494         }
2495
2496         rd = zalloc(nr_readers * sizeof(struct reader));
2497         if (!rd)
2498                 return -ENOMEM;
2499
2500         rd[0] = (struct reader) {
2501                 .fd              = perf_data__fd(session->data),
2502                 .path            = session->data->file.path,
2503                 .data_size       = session->header.data_size,
2504                 .data_offset     = session->header.data_offset,
2505                 .process         = process_simple,
2506                 .in_place_update = session->data->in_place_update,
2507         };
2508         ret = reader__init(&rd[0], NULL);
2509         if (ret)
2510                 goto out_err;
2511         ret = reader__mmap(&rd[0], session);
2512         if (ret)
2513                 goto out_err;
2514         readers = 1;
2515
2516         for (i = 0; i < data->dir.nr; i++) {
2517                 if (!data->dir.files[i].size)
2518                         continue;
2519                 rd[readers] = (struct reader) {
2520                         .fd              = data->dir.files[i].fd,
2521                         .path            = data->dir.files[i].path,
2522                         .data_size       = data->dir.files[i].size,
2523                         .data_offset     = 0,
2524                         .process         = process_simple,
2525                         .in_place_update = session->data->in_place_update,
2526                 };
2527                 ret = reader__init(&rd[readers], NULL);
2528                 if (ret)
2529                         goto out_err;
2530                 ret = reader__mmap(&rd[readers], session);
2531                 if (ret)
2532                         goto out_err;
2533                 readers++;
2534         }
2535
2536         i = 0;
2537         while (readers) {
2538                 if (session_done())
2539                         break;
2540
2541                 if (rd[i].done) {
2542                         i = (i + 1) % nr_readers;
2543                         continue;
2544                 }
2545                 if (reader__eof(&rd[i])) {
2546                         rd[i].done = true;
2547                         readers--;
2548                         continue;
2549                 }
2550
2551                 session->active_decomp = &rd[i].decomp_data;
2552                 ret = reader__read_event(&rd[i], session, &prog);
2553                 if (ret < 0) {
2554                         goto out_err;
2555                 } else if (ret == READER_NODATA) {
2556                         ret = reader__mmap(&rd[i], session);
2557                         if (ret)
2558                                 goto out_err;
2559                 }
2560
2561                 if (rd[i].size >= READER_MAX_SIZE) {
2562                         rd[i].size = 0;
2563                         i = (i + 1) % nr_readers;
2564                 }
2565         }
2566
2567         ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL);
2568         if (ret)
2569                 goto out_err;
2570
2571         ret = perf_session__flush_thread_stacks(session);
2572 out_err:
2573         ui_progress__finish();
2574
2575         if (!tool->no_warn)
2576                 perf_session__warn_about_errors(session);
2577
2578         /*
2579          * We may switching perf.data output, make ordered_events
2580          * reusable.
2581          */
2582         ordered_events__reinit(&session->ordered_events);
2583
2584         session->one_mmap = false;
2585
2586         session->active_decomp = &session->decomp_data;
2587         for (i = 0; i < nr_readers; i++)
2588                 reader__release_decomp(&rd[i]);
2589         zfree(&rd);
2590
2591         return ret;
2592 }
2593
2594 int perf_session__process_events(struct perf_session *session)
2595 {
2596         if (perf_session__register_idle_thread(session) < 0)
2597                 return -ENOMEM;
2598
2599         if (perf_data__is_pipe(session->data))
2600                 return __perf_session__process_pipe_events(session);
2601
2602         if (perf_data__is_dir(session->data) && session->data->dir.nr)
2603                 return __perf_session__process_dir_events(session);
2604
2605         return __perf_session__process_events(session);
2606 }
2607
2608 bool perf_session__has_traces(struct perf_session *session, const char *msg)
2609 {
2610         struct evsel *evsel;
2611
2612         evlist__for_each_entry(session->evlist, evsel) {
2613                 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2614                         return true;
2615         }
2616
2617         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2618         return false;
2619 }
2620
2621 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2622 {
2623         char *bracket;
2624         struct ref_reloc_sym *ref;
2625         struct kmap *kmap;
2626
2627         ref = zalloc(sizeof(struct ref_reloc_sym));
2628         if (ref == NULL)
2629                 return -ENOMEM;
2630
2631         ref->name = strdup(symbol_name);
2632         if (ref->name == NULL) {
2633                 free(ref);
2634                 return -ENOMEM;
2635         }
2636
2637         bracket = strchr(ref->name, ']');
2638         if (bracket)
2639                 *bracket = '\0';
2640
2641         ref->addr = addr;
2642
2643         kmap = map__kmap(map);
2644         if (kmap)
2645                 kmap->ref_reloc_sym = ref;
2646
2647         return 0;
2648 }
2649
2650 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2651 {
2652         return machines__fprintf_dsos(&session->machines, fp);
2653 }
2654
2655 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2656                                           bool (skip)(struct dso *dso, int parm), int parm)
2657 {
2658         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2659 }
2660
2661 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp,
2662                                        bool skip_empty)
2663 {
2664         size_t ret;
2665         const char *msg = "";
2666
2667         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2668                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2669
2670         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2671
2672         ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty);
2673         return ret;
2674 }
2675
2676 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2677 {
2678         /*
2679          * FIXME: Here we have to actually print all the machines in this
2680          * session, not just the host...
2681          */
2682         return machine__fprintf(&session->machines.host, fp);
2683 }
2684
2685 struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2686                                               unsigned int type)
2687 {
2688         struct evsel *pos;
2689
2690         evlist__for_each_entry(session->evlist, pos) {
2691                 if (pos->core.attr.type == type)
2692                         return pos;
2693         }
2694         return NULL;
2695 }
2696
2697 int perf_session__cpu_bitmap(struct perf_session *session,
2698                              const char *cpu_list, unsigned long *cpu_bitmap)
2699 {
2700         int i, err = -1;
2701         struct perf_cpu_map *map;
2702         int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS);
2703
2704         for (i = 0; i < PERF_TYPE_MAX; ++i) {
2705                 struct evsel *evsel;
2706
2707                 evsel = perf_session__find_first_evtype(session, i);
2708                 if (!evsel)
2709                         continue;
2710
2711                 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2712                         pr_err("File does not contain CPU events. "
2713                                "Remove -C option to proceed.\n");
2714                         return -1;
2715                 }
2716         }
2717
2718         map = perf_cpu_map__new(cpu_list);
2719         if (map == NULL) {
2720                 pr_err("Invalid cpu_list\n");
2721                 return -1;
2722         }
2723
2724         for (i = 0; i < perf_cpu_map__nr(map); i++) {
2725                 struct perf_cpu cpu = perf_cpu_map__cpu(map, i);
2726
2727                 if (cpu.cpu >= nr_cpus) {
2728                         pr_err("Requested CPU %d too large. "
2729                                "Consider raising MAX_NR_CPUS\n", cpu.cpu);
2730                         goto out_delete_map;
2731                 }
2732
2733                 set_bit(cpu.cpu, cpu_bitmap);
2734         }
2735
2736         err = 0;
2737
2738 out_delete_map:
2739         perf_cpu_map__put(map);
2740         return err;
2741 }
2742
2743 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2744                                 bool full)
2745 {
2746         if (session == NULL || fp == NULL)
2747                 return;
2748
2749         fprintf(fp, "# ========\n");
2750         perf_header__fprintf_info(session, fp, full);
2751         fprintf(fp, "# ========\n#\n");
2752 }
2753
2754 int perf_event__process_id_index(struct perf_session *session,
2755                                  union perf_event *event)
2756 {
2757         struct evlist *evlist = session->evlist;
2758         struct perf_record_id_index *ie = &event->id_index;
2759         size_t i, nr, max_nr;
2760
2761         max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) /
2762                  sizeof(struct id_index_entry);
2763         nr = ie->nr;
2764         if (nr > max_nr)
2765                 return -EINVAL;
2766
2767         if (dump_trace)
2768                 fprintf(stdout, " nr: %zu\n", nr);
2769
2770         for (i = 0; i < nr; i++) {
2771                 struct id_index_entry *e = &ie->entries[i];
2772                 struct perf_sample_id *sid;
2773
2774                 if (dump_trace) {
2775                         fprintf(stdout, " ... id: %"PRI_lu64, e->id);
2776                         fprintf(stdout, "  idx: %"PRI_lu64, e->idx);
2777                         fprintf(stdout, "  cpu: %"PRI_ld64, e->cpu);
2778                         fprintf(stdout, "  tid: %"PRI_ld64"\n", e->tid);
2779                 }
2780
2781                 sid = evlist__id2sid(evlist, e->id);
2782                 if (!sid)
2783                         return -ENOENT;
2784                 sid->idx = e->idx;
2785                 sid->cpu.cpu = e->cpu;
2786                 sid->tid = e->tid;
2787         }
2788         return 0;
2789 }