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         printf("%s: nr:%" PRIu64 "\n",
1155                 !callstack ? "... branch stack" : "... branch callstack",
1156                 sample->branch_stack->nr);
1157
1158         for (i = 0; i < sample->branch_stack->nr; i++) {
1159                 struct branch_entry *e = &entries[i];
1160
1161                 if (!callstack) {
1162                         printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s\n",
1163                                 i, e->from, e->to,
1164                                 (unsigned short)e->flags.cycles,
1165                                 e->flags.mispred ? "M" : " ",
1166                                 e->flags.predicted ? "P" : " ",
1167                                 e->flags.abort ? "A" : " ",
1168                                 e->flags.in_tx ? "T" : " ",
1169                                 (unsigned)e->flags.reserved,
1170                                 e->flags.type ? branch_type_name(e->flags.type) : "");
1171                 } else {
1172                         printf("..... %2"PRIu64": %016" PRIx64 "\n",
1173                                 i, i > 0 ? e->from : e->to);
1174                 }
1175         }
1176 }
1177
1178 static void regs_dump__printf(u64 mask, u64 *regs, const char *arch)
1179 {
1180         unsigned rid, i = 0;
1181
1182         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1183                 u64 val = regs[i++];
1184
1185                 printf(".... %-5s 0x%016" PRIx64 "\n",
1186                        perf_reg_name(rid, arch), val);
1187         }
1188 }
1189
1190 static const char *regs_abi[] = {
1191         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
1192         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1193         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1194 };
1195
1196 static inline const char *regs_dump_abi(struct regs_dump *d)
1197 {
1198         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1199                 return "unknown";
1200
1201         return regs_abi[d->abi];
1202 }
1203
1204 static void regs__printf(const char *type, struct regs_dump *regs, const char *arch)
1205 {
1206         u64 mask = regs->mask;
1207
1208         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1209                type,
1210                mask,
1211                regs_dump_abi(regs));
1212
1213         regs_dump__printf(mask, regs->regs, arch);
1214 }
1215
1216 static void regs_user__printf(struct perf_sample *sample, const char *arch)
1217 {
1218         struct regs_dump *user_regs = &sample->user_regs;
1219
1220         if (user_regs->regs)
1221                 regs__printf("user", user_regs, arch);
1222 }
1223
1224 static void regs_intr__printf(struct perf_sample *sample, const char *arch)
1225 {
1226         struct regs_dump *intr_regs = &sample->intr_regs;
1227
1228         if (intr_regs->regs)
1229                 regs__printf("intr", intr_regs, arch);
1230 }
1231
1232 static void stack_user__printf(struct stack_dump *dump)
1233 {
1234         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1235                dump->size, dump->offset);
1236 }
1237
1238 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
1239 {
1240         u64 sample_type = __evlist__combined_sample_type(evlist);
1241
1242         if (event->header.type != PERF_RECORD_SAMPLE &&
1243             !evlist__sample_id_all(evlist)) {
1244                 fputs("-1 -1 ", stdout);
1245                 return;
1246         }
1247
1248         if ((sample_type & PERF_SAMPLE_CPU))
1249                 printf("%u ", sample->cpu);
1250
1251         if (sample_type & PERF_SAMPLE_TIME)
1252                 printf("%" PRIu64 " ", sample->time);
1253 }
1254
1255 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1256 {
1257         printf("... sample_read:\n");
1258
1259         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1260                 printf("...... time enabled %016" PRIx64 "\n",
1261                        sample->read.time_enabled);
1262
1263         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1264                 printf("...... time running %016" PRIx64 "\n",
1265                        sample->read.time_running);
1266
1267         if (read_format & PERF_FORMAT_GROUP) {
1268                 u64 i;
1269
1270                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1271
1272                 for (i = 0; i < sample->read.group.nr; i++) {
1273                         struct sample_read_value *value;
1274
1275                         value = &sample->read.group.values[i];
1276                         printf("..... id %016" PRIx64
1277                                ", value %016" PRIx64 "\n",
1278                                value->id, value->value);
1279                 }
1280         } else
1281                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1282                         sample->read.one.id, sample->read.one.value);
1283 }
1284
1285 static void dump_event(struct evlist *evlist, union perf_event *event,
1286                        u64 file_offset, struct perf_sample *sample,
1287                        const char *file_path)
1288 {
1289         if (!dump_trace)
1290                 return;
1291
1292         printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n",
1293                file_offset, file_path, event->header.size, event->header.type);
1294
1295         trace_event(event);
1296         if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1297                 evlist->trace_event_sample_raw(evlist, event, sample);
1298
1299         if (sample)
1300                 evlist__print_tstamp(evlist, event, sample);
1301
1302         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1303                event->header.size, perf_event__name(event->header.type));
1304 }
1305
1306 char *get_page_size_name(u64 size, char *str)
1307 {
1308         if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size))
1309                 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A");
1310
1311         return str;
1312 }
1313
1314 static void dump_sample(struct evsel *evsel, union perf_event *event,
1315                         struct perf_sample *sample, const char *arch)
1316 {
1317         u64 sample_type;
1318         char str[PAGE_SIZE_NAME_LEN];
1319
1320         if (!dump_trace)
1321                 return;
1322
1323         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1324                event->header.misc, sample->pid, sample->tid, sample->ip,
1325                sample->period, sample->addr);
1326
1327         sample_type = evsel->core.attr.sample_type;
1328
1329         if (evsel__has_callchain(evsel))
1330                 callchain__printf(evsel, sample);
1331
1332         if (evsel__has_br_stack(evsel))
1333                 branch_stack__printf(sample, evsel__has_branch_callstack(evsel));
1334
1335         if (sample_type & PERF_SAMPLE_REGS_USER)
1336                 regs_user__printf(sample, arch);
1337
1338         if (sample_type & PERF_SAMPLE_REGS_INTR)
1339                 regs_intr__printf(sample, arch);
1340
1341         if (sample_type & PERF_SAMPLE_STACK_USER)
1342                 stack_user__printf(&sample->user_stack);
1343
1344         if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) {
1345                 printf("... weight: %" PRIu64 "", sample->weight);
1346                         if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) {
1347                                 printf(",0x%"PRIx16"", sample->ins_lat);
1348                                 printf(",0x%"PRIx16"", sample->p_stage_cyc);
1349                         }
1350                 printf("\n");
1351         }
1352
1353         if (sample_type & PERF_SAMPLE_DATA_SRC)
1354                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1355
1356         if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1357                 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1358
1359         if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
1360                 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str));
1361
1362         if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
1363                 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str));
1364
1365         if (sample_type & PERF_SAMPLE_TRANSACTION)
1366                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1367
1368         if (sample_type & PERF_SAMPLE_READ)
1369                 sample_read__printf(sample, evsel->core.attr.read_format);
1370 }
1371
1372 static void dump_read(struct evsel *evsel, union perf_event *event)
1373 {
1374         struct perf_record_read *read_event = &event->read;
1375         u64 read_format;
1376
1377         if (!dump_trace)
1378                 return;
1379
1380         printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1381                evsel__name(evsel), event->read.value);
1382
1383         if (!evsel)
1384                 return;
1385
1386         read_format = evsel->core.attr.read_format;
1387
1388         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1389                 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1390
1391         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1392                 printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1393
1394         if (read_format & PERF_FORMAT_ID)
1395                 printf("... id           : %" PRI_lu64 "\n", read_event->id);
1396 }
1397
1398 static struct machine *machines__find_for_cpumode(struct machines *machines,
1399                                                union perf_event *event,
1400                                                struct perf_sample *sample)
1401 {
1402         if (perf_guest &&
1403             ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1404              (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1405                 u32 pid;
1406
1407                 if (event->header.type == PERF_RECORD_MMAP
1408                     || event->header.type == PERF_RECORD_MMAP2)
1409                         pid = event->mmap.pid;
1410                 else
1411                         pid = sample->pid;
1412
1413                 return machines__find_guest(machines, pid);
1414         }
1415
1416         return &machines->host;
1417 }
1418
1419 static int deliver_sample_value(struct evlist *evlist,
1420                                 struct perf_tool *tool,
1421                                 union perf_event *event,
1422                                 struct perf_sample *sample,
1423                                 struct sample_read_value *v,
1424                                 struct machine *machine)
1425 {
1426         struct perf_sample_id *sid = evlist__id2sid(evlist, v->id);
1427         struct evsel *evsel;
1428
1429         if (sid) {
1430                 sample->id     = v->id;
1431                 sample->period = v->value - sid->period;
1432                 sid->period    = v->value;
1433         }
1434
1435         if (!sid || sid->evsel == NULL) {
1436                 ++evlist->stats.nr_unknown_id;
1437                 return 0;
1438         }
1439
1440         /*
1441          * There's no reason to deliver sample
1442          * for zero period, bail out.
1443          */
1444         if (!sample->period)
1445                 return 0;
1446
1447         evsel = container_of(sid->evsel, struct evsel, core);
1448         return tool->sample(tool, event, sample, evsel, machine);
1449 }
1450
1451 static int deliver_sample_group(struct evlist *evlist,
1452                                 struct perf_tool *tool,
1453                                 union  perf_event *event,
1454                                 struct perf_sample *sample,
1455                                 struct machine *machine)
1456 {
1457         int ret = -EINVAL;
1458         u64 i;
1459
1460         for (i = 0; i < sample->read.group.nr; i++) {
1461                 ret = deliver_sample_value(evlist, tool, event, sample,
1462                                            &sample->read.group.values[i],
1463                                            machine);
1464                 if (ret)
1465                         break;
1466         }
1467
1468         return ret;
1469 }
1470
1471 static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool,
1472                                   union  perf_event *event, struct perf_sample *sample,
1473                                   struct evsel *evsel, struct machine *machine)
1474 {
1475         /* We know evsel != NULL. */
1476         u64 sample_type = evsel->core.attr.sample_type;
1477         u64 read_format = evsel->core.attr.read_format;
1478
1479         /* Standard sample delivery. */
1480         if (!(sample_type & PERF_SAMPLE_READ))
1481                 return tool->sample(tool, event, sample, evsel, machine);
1482
1483         /* For PERF_SAMPLE_READ we have either single or group mode. */
1484         if (read_format & PERF_FORMAT_GROUP)
1485                 return deliver_sample_group(evlist, tool, event, sample,
1486                                             machine);
1487         else
1488                 return deliver_sample_value(evlist, tool, event, sample,
1489                                             &sample->read.one, machine);
1490 }
1491
1492 static int machines__deliver_event(struct machines *machines,
1493                                    struct evlist *evlist,
1494                                    union perf_event *event,
1495                                    struct perf_sample *sample,
1496                                    struct perf_tool *tool, u64 file_offset,
1497                                    const char *file_path)
1498 {
1499         struct evsel *evsel;
1500         struct machine *machine;
1501
1502         dump_event(evlist, event, file_offset, sample, file_path);
1503
1504         evsel = evlist__id2evsel(evlist, sample->id);
1505
1506         machine = machines__find_for_cpumode(machines, event, sample);
1507
1508         switch (event->header.type) {
1509         case PERF_RECORD_SAMPLE:
1510                 if (evsel == NULL) {
1511                         ++evlist->stats.nr_unknown_id;
1512                         return 0;
1513                 }
1514                 if (machine == NULL) {
1515                         ++evlist->stats.nr_unprocessable_samples;
1516                         dump_sample(evsel, event, sample, perf_env__arch(NULL));
1517                         return 0;
1518                 }
1519                 dump_sample(evsel, event, sample, perf_env__arch(machine->env));
1520                 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1521         case PERF_RECORD_MMAP:
1522                 return tool->mmap(tool, event, sample, machine);
1523         case PERF_RECORD_MMAP2:
1524                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1525                         ++evlist->stats.nr_proc_map_timeout;
1526                 return tool->mmap2(tool, event, sample, machine);
1527         case PERF_RECORD_COMM:
1528                 return tool->comm(tool, event, sample, machine);
1529         case PERF_RECORD_NAMESPACES:
1530                 return tool->namespaces(tool, event, sample, machine);
1531         case PERF_RECORD_CGROUP:
1532                 return tool->cgroup(tool, event, sample, machine);
1533         case PERF_RECORD_FORK:
1534                 return tool->fork(tool, event, sample, machine);
1535         case PERF_RECORD_EXIT:
1536                 return tool->exit(tool, event, sample, machine);
1537         case PERF_RECORD_LOST:
1538                 if (tool->lost == perf_event__process_lost)
1539                         evlist->stats.total_lost += event->lost.lost;
1540                 return tool->lost(tool, event, sample, machine);
1541         case PERF_RECORD_LOST_SAMPLES:
1542                 if (tool->lost_samples == perf_event__process_lost_samples)
1543                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1544                 return tool->lost_samples(tool, event, sample, machine);
1545         case PERF_RECORD_READ:
1546                 dump_read(evsel, event);
1547                 return tool->read(tool, event, sample, evsel, machine);
1548         case PERF_RECORD_THROTTLE:
1549                 return tool->throttle(tool, event, sample, machine);
1550         case PERF_RECORD_UNTHROTTLE:
1551                 return tool->unthrottle(tool, event, sample, machine);
1552         case PERF_RECORD_AUX:
1553                 if (tool->aux == perf_event__process_aux) {
1554                         if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1555                                 evlist->stats.total_aux_lost += 1;
1556                         if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1557                                 evlist->stats.total_aux_partial += 1;
1558                         if (event->aux.flags & PERF_AUX_FLAG_COLLISION)
1559                                 evlist->stats.total_aux_collision += 1;
1560                 }
1561                 return tool->aux(tool, event, sample, machine);
1562         case PERF_RECORD_ITRACE_START:
1563                 return tool->itrace_start(tool, event, sample, machine);
1564         case PERF_RECORD_SWITCH:
1565         case PERF_RECORD_SWITCH_CPU_WIDE:
1566                 return tool->context_switch(tool, event, sample, machine);
1567         case PERF_RECORD_KSYMBOL:
1568                 return tool->ksymbol(tool, event, sample, machine);
1569         case PERF_RECORD_BPF_EVENT:
1570                 return tool->bpf(tool, event, sample, machine);
1571         case PERF_RECORD_TEXT_POKE:
1572                 return tool->text_poke(tool, event, sample, machine);
1573         case PERF_RECORD_AUX_OUTPUT_HW_ID:
1574                 return tool->aux_output_hw_id(tool, event, sample, machine);
1575         default:
1576                 ++evlist->stats.nr_unknown_events;
1577                 return -1;
1578         }
1579 }
1580
1581 static int perf_session__deliver_event(struct perf_session *session,
1582                                        union perf_event *event,
1583                                        struct perf_tool *tool,
1584                                        u64 file_offset,
1585                                        const char *file_path)
1586 {
1587         struct perf_sample sample;
1588         int ret = evlist__parse_sample(session->evlist, event, &sample);
1589
1590         if (ret) {
1591                 pr_err("Can't parse sample, err = %d\n", ret);
1592                 return ret;
1593         }
1594
1595         ret = auxtrace__process_event(session, event, &sample, tool);
1596         if (ret < 0)
1597                 return ret;
1598         if (ret > 0)
1599                 return 0;
1600
1601         ret = machines__deliver_event(&session->machines, session->evlist,
1602                                       event, &sample, tool, file_offset, file_path);
1603
1604         if (dump_trace && sample.aux_sample.size)
1605                 auxtrace__dump_auxtrace_sample(session, &sample);
1606
1607         return ret;
1608 }
1609
1610 static s64 perf_session__process_user_event(struct perf_session *session,
1611                                             union perf_event *event,
1612                                             u64 file_offset,
1613                                             const char *file_path)
1614 {
1615         struct ordered_events *oe = &session->ordered_events;
1616         struct perf_tool *tool = session->tool;
1617         struct perf_sample sample = { .time = 0, };
1618         int fd = perf_data__fd(session->data);
1619         int err;
1620
1621         if (event->header.type != PERF_RECORD_COMPRESSED ||
1622             tool->compressed == perf_session__process_compressed_event_stub)
1623                 dump_event(session->evlist, event, file_offset, &sample, file_path);
1624
1625         /* These events are processed right away */
1626         switch (event->header.type) {
1627         case PERF_RECORD_HEADER_ATTR:
1628                 err = tool->attr(tool, event, &session->evlist);
1629                 if (err == 0) {
1630                         perf_session__set_id_hdr_size(session);
1631                         perf_session__set_comm_exec(session);
1632                 }
1633                 return err;
1634         case PERF_RECORD_EVENT_UPDATE:
1635                 return tool->event_update(tool, event, &session->evlist);
1636         case PERF_RECORD_HEADER_EVENT_TYPE:
1637                 /*
1638                  * Deprecated, but we need to handle it for sake
1639                  * of old data files create in pipe mode.
1640                  */
1641                 return 0;
1642         case PERF_RECORD_HEADER_TRACING_DATA:
1643                 /*
1644                  * Setup for reading amidst mmap, but only when we
1645                  * are in 'file' mode. The 'pipe' fd is in proper
1646                  * place already.
1647                  */
1648                 if (!perf_data__is_pipe(session->data))
1649                         lseek(fd, file_offset, SEEK_SET);
1650                 return tool->tracing_data(session, event);
1651         case PERF_RECORD_HEADER_BUILD_ID:
1652                 return tool->build_id(session, event);
1653         case PERF_RECORD_FINISHED_ROUND:
1654                 return tool->finished_round(tool, event, oe);
1655         case PERF_RECORD_ID_INDEX:
1656                 return tool->id_index(session, event);
1657         case PERF_RECORD_AUXTRACE_INFO:
1658                 return tool->auxtrace_info(session, event);
1659         case PERF_RECORD_AUXTRACE:
1660                 /* setup for reading amidst mmap */
1661                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1662                 return tool->auxtrace(session, event);
1663         case PERF_RECORD_AUXTRACE_ERROR:
1664                 perf_session__auxtrace_error_inc(session, event);
1665                 return tool->auxtrace_error(session, event);
1666         case PERF_RECORD_THREAD_MAP:
1667                 return tool->thread_map(session, event);
1668         case PERF_RECORD_CPU_MAP:
1669                 return tool->cpu_map(session, event);
1670         case PERF_RECORD_STAT_CONFIG:
1671                 return tool->stat_config(session, event);
1672         case PERF_RECORD_STAT:
1673                 return tool->stat(session, event);
1674         case PERF_RECORD_STAT_ROUND:
1675                 return tool->stat_round(session, event);
1676         case PERF_RECORD_TIME_CONV:
1677                 session->time_conv = event->time_conv;
1678                 return tool->time_conv(session, event);
1679         case PERF_RECORD_HEADER_FEATURE:
1680                 return tool->feature(session, event);
1681         case PERF_RECORD_COMPRESSED:
1682                 err = tool->compressed(session, event, file_offset, file_path);
1683                 if (err)
1684                         dump_event(session->evlist, event, file_offset, &sample, file_path);
1685                 return err;
1686         default:
1687                 return -EINVAL;
1688         }
1689 }
1690
1691 int perf_session__deliver_synth_event(struct perf_session *session,
1692                                       union perf_event *event,
1693                                       struct perf_sample *sample)
1694 {
1695         struct evlist *evlist = session->evlist;
1696         struct perf_tool *tool = session->tool;
1697
1698         events_stats__inc(&evlist->stats, event->header.type);
1699
1700         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1701                 return perf_session__process_user_event(session, event, 0, NULL);
1702
1703         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL);
1704 }
1705
1706 static void event_swap(union perf_event *event, bool sample_id_all)
1707 {
1708         perf_event__swap_op swap;
1709
1710         swap = perf_event__swap_ops[event->header.type];
1711         if (swap)
1712                 swap(event, sample_id_all);
1713 }
1714
1715 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1716                              void *buf, size_t buf_sz,
1717                              union perf_event **event_ptr,
1718                              struct perf_sample *sample)
1719 {
1720         union perf_event *event;
1721         size_t hdr_sz, rest;
1722         int fd;
1723
1724         if (session->one_mmap && !session->header.needs_swap) {
1725                 event = file_offset - session->one_mmap_offset +
1726                         session->one_mmap_addr;
1727                 goto out_parse_sample;
1728         }
1729
1730         if (perf_data__is_pipe(session->data))
1731                 return -1;
1732
1733         fd = perf_data__fd(session->data);
1734         hdr_sz = sizeof(struct perf_event_header);
1735
1736         if (buf_sz < hdr_sz)
1737                 return -1;
1738
1739         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1740             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1741                 return -1;
1742
1743         event = (union perf_event *)buf;
1744
1745         if (session->header.needs_swap)
1746                 perf_event_header__bswap(&event->header);
1747
1748         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1749                 return -1;
1750
1751         buf += hdr_sz;
1752         rest = event->header.size - hdr_sz;
1753
1754         if (readn(fd, buf, rest) != (ssize_t)rest)
1755                 return -1;
1756
1757         if (session->header.needs_swap)
1758                 event_swap(event, evlist__sample_id_all(session->evlist));
1759
1760 out_parse_sample:
1761
1762         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1763             evlist__parse_sample(session->evlist, event, sample))
1764                 return -1;
1765
1766         *event_ptr = event;
1767
1768         return 0;
1769 }
1770
1771 int perf_session__peek_events(struct perf_session *session, u64 offset,
1772                               u64 size, peek_events_cb_t cb, void *data)
1773 {
1774         u64 max_offset = offset + size;
1775         char buf[PERF_SAMPLE_MAX_SIZE];
1776         union perf_event *event;
1777         int err;
1778
1779         do {
1780                 err = perf_session__peek_event(session, offset, buf,
1781                                                PERF_SAMPLE_MAX_SIZE, &event,
1782                                                NULL);
1783                 if (err)
1784                         return err;
1785
1786                 err = cb(session, event, offset, data);
1787                 if (err)
1788                         return err;
1789
1790                 offset += event->header.size;
1791                 if (event->header.type == PERF_RECORD_AUXTRACE)
1792                         offset += event->auxtrace.size;
1793
1794         } while (offset < max_offset);
1795
1796         return err;
1797 }
1798
1799 static s64 perf_session__process_event(struct perf_session *session,
1800                                        union perf_event *event, u64 file_offset,
1801                                        const char *file_path)
1802 {
1803         struct evlist *evlist = session->evlist;
1804         struct perf_tool *tool = session->tool;
1805         int ret;
1806
1807         if (session->header.needs_swap)
1808                 event_swap(event, evlist__sample_id_all(evlist));
1809
1810         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1811                 return -EINVAL;
1812
1813         events_stats__inc(&evlist->stats, event->header.type);
1814
1815         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1816                 return perf_session__process_user_event(session, event, file_offset, file_path);
1817
1818         if (tool->ordered_events) {
1819                 u64 timestamp = -1ULL;
1820
1821                 ret = evlist__parse_sample_timestamp(evlist, event, &timestamp);
1822                 if (ret && ret != -1)
1823                         return ret;
1824
1825                 ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path);
1826                 if (ret != -ETIME)
1827                         return ret;
1828         }
1829
1830         return perf_session__deliver_event(session, event, tool, file_offset, file_path);
1831 }
1832
1833 void perf_event_header__bswap(struct perf_event_header *hdr)
1834 {
1835         hdr->type = bswap_32(hdr->type);
1836         hdr->misc = bswap_16(hdr->misc);
1837         hdr->size = bswap_16(hdr->size);
1838 }
1839
1840 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1841 {
1842         return machine__findnew_thread(&session->machines.host, -1, pid);
1843 }
1844
1845 int perf_session__register_idle_thread(struct perf_session *session)
1846 {
1847         struct thread *thread = machine__idle_thread(&session->machines.host);
1848
1849         /* machine__idle_thread() got the thread, so put it */
1850         thread__put(thread);
1851         return thread ? 0 : -1;
1852 }
1853
1854 static void
1855 perf_session__warn_order(const struct perf_session *session)
1856 {
1857         const struct ordered_events *oe = &session->ordered_events;
1858         struct evsel *evsel;
1859         bool should_warn = true;
1860
1861         evlist__for_each_entry(session->evlist, evsel) {
1862                 if (evsel->core.attr.write_backward)
1863                         should_warn = false;
1864         }
1865
1866         if (!should_warn)
1867                 return;
1868         if (oe->nr_unordered_events != 0)
1869                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1870 }
1871
1872 static void perf_session__warn_about_errors(const struct perf_session *session)
1873 {
1874         const struct events_stats *stats = &session->evlist->stats;
1875
1876         if (session->tool->lost == perf_event__process_lost &&
1877             stats->nr_events[PERF_RECORD_LOST] != 0) {
1878                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1879                             "Check IO/CPU overload!\n\n",
1880                             stats->nr_events[0],
1881                             stats->nr_events[PERF_RECORD_LOST]);
1882         }
1883
1884         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1885                 double drop_rate;
1886
1887                 drop_rate = (double)stats->total_lost_samples /
1888                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1889                 if (drop_rate > 0.05) {
1890                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1891                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1892                                     drop_rate * 100.0);
1893                 }
1894         }
1895
1896         if (session->tool->aux == perf_event__process_aux &&
1897             stats->total_aux_lost != 0) {
1898                 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1899                             stats->total_aux_lost,
1900                             stats->nr_events[PERF_RECORD_AUX]);
1901         }
1902
1903         if (session->tool->aux == perf_event__process_aux &&
1904             stats->total_aux_partial != 0) {
1905                 bool vmm_exclusive = false;
1906
1907                 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1908                                        &vmm_exclusive);
1909
1910                 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1911                             "Are you running a KVM guest in the background?%s\n\n",
1912                             stats->total_aux_partial,
1913                             stats->nr_events[PERF_RECORD_AUX],
1914                             vmm_exclusive ?
1915                             "\nReloading kvm_intel module with vmm_exclusive=0\n"
1916                             "will reduce the gaps to only guest's timeslices." :
1917                             "");
1918         }
1919
1920         if (session->tool->aux == perf_event__process_aux &&
1921             stats->total_aux_collision != 0) {
1922                 ui__warning("AUX data detected collision  %" PRIu64 " times out of %u!\n\n",
1923                             stats->total_aux_collision,
1924                             stats->nr_events[PERF_RECORD_AUX]);
1925         }
1926
1927         if (stats->nr_unknown_events != 0) {
1928                 ui__warning("Found %u unknown events!\n\n"
1929                             "Is this an older tool processing a perf.data "
1930                             "file generated by a more recent tool?\n\n"
1931                             "If that is not the case, consider "
1932                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1933                             stats->nr_unknown_events);
1934         }
1935
1936         if (stats->nr_unknown_id != 0) {
1937                 ui__warning("%u samples with id not present in the header\n",
1938                             stats->nr_unknown_id);
1939         }
1940
1941         if (stats->nr_invalid_chains != 0) {
1942                 ui__warning("Found invalid callchains!\n\n"
1943                             "%u out of %u events were discarded for this reason.\n\n"
1944                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1945                             stats->nr_invalid_chains,
1946                             stats->nr_events[PERF_RECORD_SAMPLE]);
1947         }
1948
1949         if (stats->nr_unprocessable_samples != 0) {
1950                 ui__warning("%u unprocessable samples recorded.\n"
1951                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1952                             stats->nr_unprocessable_samples);
1953         }
1954
1955         perf_session__warn_order(session);
1956
1957         events_stats__auxtrace_error_warn(stats);
1958
1959         if (stats->nr_proc_map_timeout != 0) {
1960                 ui__warning("%d map information files for pre-existing threads were\n"
1961                             "not processed, if there are samples for addresses they\n"
1962                             "will not be resolved, you may find out which are these\n"
1963                             "threads by running with -v and redirecting the output\n"
1964                             "to a file.\n"
1965                             "The time limit to process proc map is too short?\n"
1966                             "Increase it by --proc-map-timeout\n",
1967                             stats->nr_proc_map_timeout);
1968         }
1969 }
1970
1971 static int perf_session__flush_thread_stack(struct thread *thread,
1972                                             void *p __maybe_unused)
1973 {
1974         return thread_stack__flush(thread);
1975 }
1976
1977 static int perf_session__flush_thread_stacks(struct perf_session *session)
1978 {
1979         return machines__for_each_thread(&session->machines,
1980                                          perf_session__flush_thread_stack,
1981                                          NULL);
1982 }
1983
1984 volatile int session_done;
1985
1986 static int __perf_session__process_decomp_events(struct perf_session *session);
1987
1988 static int __perf_session__process_pipe_events(struct perf_session *session)
1989 {
1990         struct ordered_events *oe = &session->ordered_events;
1991         struct perf_tool *tool = session->tool;
1992         union perf_event *event;
1993         uint32_t size, cur_size = 0;
1994         void *buf = NULL;
1995         s64 skip = 0;
1996         u64 head;
1997         ssize_t err;
1998         void *p;
1999
2000         perf_tool__fill_defaults(tool);
2001
2002         head = 0;
2003         cur_size = sizeof(union perf_event);
2004
2005         buf = malloc(cur_size);
2006         if (!buf)
2007                 return -errno;
2008         ordered_events__set_copy_on_queue(oe, true);
2009 more:
2010         event = buf;
2011         err = perf_data__read(session->data, event,
2012                               sizeof(struct perf_event_header));
2013         if (err <= 0) {
2014                 if (err == 0)
2015                         goto done;
2016
2017                 pr_err("failed to read event header\n");
2018                 goto out_err;
2019         }
2020
2021         if (session->header.needs_swap)
2022                 perf_event_header__bswap(&event->header);
2023
2024         size = event->header.size;
2025         if (size < sizeof(struct perf_event_header)) {
2026                 pr_err("bad event header size\n");
2027                 goto out_err;
2028         }
2029
2030         if (size > cur_size) {
2031                 void *new = realloc(buf, size);
2032                 if (!new) {
2033                         pr_err("failed to allocate memory to read event\n");
2034                         goto out_err;
2035                 }
2036                 buf = new;
2037                 cur_size = size;
2038                 event = buf;
2039         }
2040         p = event;
2041         p += sizeof(struct perf_event_header);
2042
2043         if (size - sizeof(struct perf_event_header)) {
2044                 err = perf_data__read(session->data, p,
2045                                       size - sizeof(struct perf_event_header));
2046                 if (err <= 0) {
2047                         if (err == 0) {
2048                                 pr_err("unexpected end of event stream\n");
2049                                 goto done;
2050                         }
2051
2052                         pr_err("failed to read event data\n");
2053                         goto out_err;
2054                 }
2055         }
2056
2057         if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) {
2058                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2059                        head, event->header.size, event->header.type);
2060                 err = -EINVAL;
2061                 goto out_err;
2062         }
2063
2064         head += size;
2065
2066         if (skip > 0)
2067                 head += skip;
2068
2069         err = __perf_session__process_decomp_events(session);
2070         if (err)
2071                 goto out_err;
2072
2073         if (!session_done())
2074                 goto more;
2075 done:
2076         /* do the final flush for ordered samples */
2077         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2078         if (err)
2079                 goto out_err;
2080         err = auxtrace__flush_events(session, tool);
2081         if (err)
2082                 goto out_err;
2083         err = perf_session__flush_thread_stacks(session);
2084 out_err:
2085         free(buf);
2086         if (!tool->no_warn)
2087                 perf_session__warn_about_errors(session);
2088         ordered_events__free(&session->ordered_events);
2089         auxtrace__free_events(session);
2090         return err;
2091 }
2092
2093 static union perf_event *
2094 prefetch_event(char *buf, u64 head, size_t mmap_size,
2095                bool needs_swap, union perf_event *error)
2096 {
2097         union perf_event *event;
2098
2099         /*
2100          * Ensure we have enough space remaining to read
2101          * the size of the event in the headers.
2102          */
2103         if (head + sizeof(event->header) > mmap_size)
2104                 return NULL;
2105
2106         event = (union perf_event *)(buf + head);
2107         if (needs_swap)
2108                 perf_event_header__bswap(&event->header);
2109
2110         if (head + event->header.size <= mmap_size)
2111                 return event;
2112
2113         /* We're not fetching the event so swap back again */
2114         if (needs_swap)
2115                 perf_event_header__bswap(&event->header);
2116
2117         pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx:"
2118                  " fuzzed or compressed perf.data?\n",__func__, head, event->header.size, mmap_size);
2119
2120         return error;
2121 }
2122
2123 static union perf_event *
2124 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2125 {
2126         return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
2127 }
2128
2129 static union perf_event *
2130 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2131 {
2132         return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
2133 }
2134
2135 static int __perf_session__process_decomp_events(struct perf_session *session)
2136 {
2137         s64 skip;
2138         u64 size;
2139         struct decomp *decomp = session->active_decomp->decomp_last;
2140
2141         if (!decomp)
2142                 return 0;
2143
2144         while (decomp->head < decomp->size && !session_done()) {
2145                 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2146                                                              session->header.needs_swap);
2147
2148                 if (!event)
2149                         break;
2150
2151                 size = event->header.size;
2152
2153                 if (size < sizeof(struct perf_event_header) ||
2154                     (skip = perf_session__process_event(session, event, decomp->file_pos,
2155                                                         decomp->file_path)) < 0) {
2156                         pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2157                                 decomp->file_pos + decomp->head, event->header.size, event->header.type);
2158                         return -EINVAL;
2159                 }
2160
2161                 if (skip)
2162                         size += skip;
2163
2164                 decomp->head += size;
2165         }
2166
2167         return 0;
2168 }
2169
2170 /*
2171  * On 64bit we can mmap the data file in one go. No need for tiny mmap
2172  * slices. On 32bit we use 32MB.
2173  */
2174 #if BITS_PER_LONG == 64
2175 #define MMAP_SIZE ULLONG_MAX
2176 #define NUM_MMAPS 1
2177 #else
2178 #define MMAP_SIZE (32 * 1024 * 1024ULL)
2179 #define NUM_MMAPS 128
2180 #endif
2181
2182 struct reader;
2183
2184 typedef s64 (*reader_cb_t)(struct perf_session *session,
2185                            union perf_event *event,
2186                            u64 file_offset,
2187                            const char *file_path);
2188
2189 struct reader {
2190         int              fd;
2191         const char       *path;
2192         u64              data_size;
2193         u64              data_offset;
2194         reader_cb_t      process;
2195         bool             in_place_update;
2196         char             *mmaps[NUM_MMAPS];
2197         size_t           mmap_size;
2198         int              mmap_idx;
2199         char             *mmap_cur;
2200         u64              file_pos;
2201         u64              file_offset;
2202         u64              head;
2203         u64              size;
2204         bool             done;
2205         struct zstd_data   zstd_data;
2206         struct decomp_data decomp_data;
2207 };
2208
2209 static int
2210 reader__init(struct reader *rd, bool *one_mmap)
2211 {
2212         u64 data_size = rd->data_size;
2213         char **mmaps = rd->mmaps;
2214
2215         rd->head = rd->data_offset;
2216         data_size += rd->data_offset;
2217
2218         rd->mmap_size = MMAP_SIZE;
2219         if (rd->mmap_size > data_size) {
2220                 rd->mmap_size = data_size;
2221                 if (one_mmap)
2222                         *one_mmap = true;
2223         }
2224
2225         memset(mmaps, 0, sizeof(rd->mmaps));
2226
2227         if (zstd_init(&rd->zstd_data, 0))
2228                 return -1;
2229         rd->decomp_data.zstd_decomp = &rd->zstd_data;
2230
2231         return 0;
2232 }
2233
2234 static void
2235 reader__release_decomp(struct reader *rd)
2236 {
2237         perf_decomp__release_events(rd->decomp_data.decomp);
2238         zstd_fini(&rd->zstd_data);
2239 }
2240
2241 static int
2242 reader__mmap(struct reader *rd, struct perf_session *session)
2243 {
2244         int mmap_prot, mmap_flags;
2245         char *buf, **mmaps = rd->mmaps;
2246         u64 page_offset;
2247
2248         mmap_prot  = PROT_READ;
2249         mmap_flags = MAP_SHARED;
2250
2251         if (rd->in_place_update) {
2252                 mmap_prot  |= PROT_WRITE;
2253         } else if (session->header.needs_swap) {
2254                 mmap_prot  |= PROT_WRITE;
2255                 mmap_flags = MAP_PRIVATE;
2256         }
2257
2258         if (mmaps[rd->mmap_idx]) {
2259                 munmap(mmaps[rd->mmap_idx], rd->mmap_size);
2260                 mmaps[rd->mmap_idx] = NULL;
2261         }
2262
2263         page_offset = page_size * (rd->head / page_size);
2264         rd->file_offset += page_offset;
2265         rd->head -= page_offset;
2266
2267         buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd,
2268                    rd->file_offset);
2269         if (buf == MAP_FAILED) {
2270                 pr_err("failed to mmap file\n");
2271                 return -errno;
2272         }
2273         mmaps[rd->mmap_idx] = rd->mmap_cur = buf;
2274         rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1);
2275         rd->file_pos = rd->file_offset + rd->head;
2276         if (session->one_mmap) {
2277                 session->one_mmap_addr = buf;
2278                 session->one_mmap_offset = rd->file_offset;
2279         }
2280
2281         return 0;
2282 }
2283
2284 enum {
2285         READER_OK,
2286         READER_NODATA,
2287 };
2288
2289 static int
2290 reader__read_event(struct reader *rd, struct perf_session *session,
2291                    struct ui_progress *prog)
2292 {
2293         u64 size;
2294         int err = READER_OK;
2295         union perf_event *event;
2296         s64 skip;
2297
2298         event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur,
2299                                    session->header.needs_swap);
2300         if (IS_ERR(event))
2301                 return PTR_ERR(event);
2302
2303         if (!event)
2304                 return READER_NODATA;
2305
2306         size = event->header.size;
2307
2308         skip = -EINVAL;
2309
2310         if (size < sizeof(struct perf_event_header) ||
2311             (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) {
2312                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2313                        rd->file_offset + rd->head, event->header.size,
2314                        event->header.type, strerror(-skip));
2315                 err = skip;
2316                 goto out;
2317         }
2318
2319         if (skip)
2320                 size += skip;
2321
2322         rd->size += size;
2323         rd->head += size;
2324         rd->file_pos += size;
2325
2326         err = __perf_session__process_decomp_events(session);
2327         if (err)
2328                 goto out;
2329
2330         ui_progress__update(prog, size);
2331
2332 out:
2333         return err;
2334 }
2335
2336 static inline bool
2337 reader__eof(struct reader *rd)
2338 {
2339         return (rd->file_pos >= rd->data_size + rd->data_offset);
2340 }
2341
2342 static int
2343 reader__process_events(struct reader *rd, struct perf_session *session,
2344                        struct ui_progress *prog)
2345 {
2346         int err;
2347
2348         err = reader__init(rd, &session->one_mmap);
2349         if (err)
2350                 goto out;
2351
2352         session->active_decomp = &rd->decomp_data;
2353
2354 remap:
2355         err = reader__mmap(rd, session);
2356         if (err)
2357                 goto out;
2358
2359 more:
2360         err = reader__read_event(rd, session, prog);
2361         if (err < 0)
2362                 goto out;
2363         else if (err == READER_NODATA)
2364                 goto remap;
2365
2366         if (session_done())
2367                 goto out;
2368
2369         if (!reader__eof(rd))
2370                 goto more;
2371
2372 out:
2373         session->active_decomp = &session->decomp_data;
2374         return err;
2375 }
2376
2377 static s64 process_simple(struct perf_session *session,
2378                           union perf_event *event,
2379                           u64 file_offset,
2380                           const char *file_path)
2381 {
2382         return perf_session__process_event(session, event, file_offset, file_path);
2383 }
2384
2385 static int __perf_session__process_events(struct perf_session *session)
2386 {
2387         struct reader rd = {
2388                 .fd             = perf_data__fd(session->data),
2389                 .path           = session->data->file.path,
2390                 .data_size      = session->header.data_size,
2391                 .data_offset    = session->header.data_offset,
2392                 .process        = process_simple,
2393                 .in_place_update = session->data->in_place_update,
2394         };
2395         struct ordered_events *oe = &session->ordered_events;
2396         struct perf_tool *tool = session->tool;
2397         struct ui_progress prog;
2398         int err;
2399
2400         perf_tool__fill_defaults(tool);
2401
2402         if (rd.data_size == 0)
2403                 return -1;
2404
2405         ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2406
2407         err = reader__process_events(&rd, session, &prog);
2408         if (err)
2409                 goto out_err;
2410         /* do the final flush for ordered samples */
2411         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2412         if (err)
2413                 goto out_err;
2414         err = auxtrace__flush_events(session, tool);
2415         if (err)
2416                 goto out_err;
2417         err = perf_session__flush_thread_stacks(session);
2418 out_err:
2419         ui_progress__finish();
2420         if (!tool->no_warn)
2421                 perf_session__warn_about_errors(session);
2422         /*
2423          * We may switching perf.data output, make ordered_events
2424          * reusable.
2425          */
2426         ordered_events__reinit(&session->ordered_events);
2427         auxtrace__free_events(session);
2428         reader__release_decomp(&rd);
2429         session->one_mmap = false;
2430         return err;
2431 }
2432
2433 /*
2434  * Processing 2 MB of data from each reader in sequence,
2435  * because that's the way the ordered events sorting works
2436  * most efficiently.
2437  */
2438 #define READER_MAX_SIZE (2 * 1024 * 1024)
2439
2440 /*
2441  * This function reads, merge and process directory data.
2442  * It assumens the version 1 of directory data, where each
2443  * data file holds per-cpu data, already sorted by kernel.
2444  */
2445 static int __perf_session__process_dir_events(struct perf_session *session)
2446 {
2447         struct perf_data *data = session->data;
2448         struct perf_tool *tool = session->tool;
2449         int i, ret, readers, nr_readers;
2450         struct ui_progress prog;
2451         u64 total_size = perf_data__size(session->data);
2452         struct reader *rd;
2453
2454         perf_tool__fill_defaults(tool);
2455
2456         ui_progress__init_size(&prog, total_size, "Sorting events...");
2457
2458         nr_readers = 1;
2459         for (i = 0; i < data->dir.nr; i++) {
2460                 if (data->dir.files[i].size)
2461                         nr_readers++;
2462         }
2463
2464         rd = zalloc(nr_readers * sizeof(struct reader));
2465         if (!rd)
2466                 return -ENOMEM;
2467
2468         rd[0] = (struct reader) {
2469                 .fd              = perf_data__fd(session->data),
2470                 .path            = session->data->file.path,
2471                 .data_size       = session->header.data_size,
2472                 .data_offset     = session->header.data_offset,
2473                 .process         = process_simple,
2474                 .in_place_update = session->data->in_place_update,
2475         };
2476         ret = reader__init(&rd[0], NULL);
2477         if (ret)
2478                 goto out_err;
2479         ret = reader__mmap(&rd[0], session);
2480         if (ret)
2481                 goto out_err;
2482         readers = 1;
2483
2484         for (i = 0; i < data->dir.nr; i++) {
2485                 if (!data->dir.files[i].size)
2486                         continue;
2487                 rd[readers] = (struct reader) {
2488                         .fd              = data->dir.files[i].fd,
2489                         .path            = data->dir.files[i].path,
2490                         .data_size       = data->dir.files[i].size,
2491                         .data_offset     = 0,
2492                         .process         = process_simple,
2493                         .in_place_update = session->data->in_place_update,
2494                 };
2495                 ret = reader__init(&rd[readers], NULL);
2496                 if (ret)
2497                         goto out_err;
2498                 ret = reader__mmap(&rd[readers], session);
2499                 if (ret)
2500                         goto out_err;
2501                 readers++;
2502         }
2503
2504         i = 0;
2505         while (readers) {
2506                 if (session_done())
2507                         break;
2508
2509                 if (rd[i].done) {
2510                         i = (i + 1) % nr_readers;
2511                         continue;
2512                 }
2513                 if (reader__eof(&rd[i])) {
2514                         rd[i].done = true;
2515                         readers--;
2516                         continue;
2517                 }
2518
2519                 session->active_decomp = &rd[i].decomp_data;
2520                 ret = reader__read_event(&rd[i], session, &prog);
2521                 if (ret < 0) {
2522                         goto out_err;
2523                 } else if (ret == READER_NODATA) {
2524                         ret = reader__mmap(&rd[i], session);
2525                         if (ret)
2526                                 goto out_err;
2527                 }
2528
2529                 if (rd[i].size >= READER_MAX_SIZE) {
2530                         rd[i].size = 0;
2531                         i = (i + 1) % nr_readers;
2532                 }
2533         }
2534
2535         ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL);
2536         if (ret)
2537                 goto out_err;
2538
2539         ret = perf_session__flush_thread_stacks(session);
2540 out_err:
2541         ui_progress__finish();
2542
2543         if (!tool->no_warn)
2544                 perf_session__warn_about_errors(session);
2545
2546         /*
2547          * We may switching perf.data output, make ordered_events
2548          * reusable.
2549          */
2550         ordered_events__reinit(&session->ordered_events);
2551
2552         session->one_mmap = false;
2553
2554         session->active_decomp = &session->decomp_data;
2555         for (i = 0; i < nr_readers; i++)
2556                 reader__release_decomp(&rd[i]);
2557         zfree(&rd);
2558
2559         return ret;
2560 }
2561
2562 int perf_session__process_events(struct perf_session *session)
2563 {
2564         if (perf_session__register_idle_thread(session) < 0)
2565                 return -ENOMEM;
2566
2567         if (perf_data__is_pipe(session->data))
2568                 return __perf_session__process_pipe_events(session);
2569
2570         if (perf_data__is_dir(session->data))
2571                 return __perf_session__process_dir_events(session);
2572
2573         return __perf_session__process_events(session);
2574 }
2575
2576 bool perf_session__has_traces(struct perf_session *session, const char *msg)
2577 {
2578         struct evsel *evsel;
2579
2580         evlist__for_each_entry(session->evlist, evsel) {
2581                 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2582                         return true;
2583         }
2584
2585         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2586         return false;
2587 }
2588
2589 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2590 {
2591         char *bracket;
2592         struct ref_reloc_sym *ref;
2593         struct kmap *kmap;
2594
2595         ref = zalloc(sizeof(struct ref_reloc_sym));
2596         if (ref == NULL)
2597                 return -ENOMEM;
2598
2599         ref->name = strdup(symbol_name);
2600         if (ref->name == NULL) {
2601                 free(ref);
2602                 return -ENOMEM;
2603         }
2604
2605         bracket = strchr(ref->name, ']');
2606         if (bracket)
2607                 *bracket = '\0';
2608
2609         ref->addr = addr;
2610
2611         kmap = map__kmap(map);
2612         if (kmap)
2613                 kmap->ref_reloc_sym = ref;
2614
2615         return 0;
2616 }
2617
2618 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2619 {
2620         return machines__fprintf_dsos(&session->machines, fp);
2621 }
2622
2623 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2624                                           bool (skip)(struct dso *dso, int parm), int parm)
2625 {
2626         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2627 }
2628
2629 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp,
2630                                        bool skip_empty)
2631 {
2632         size_t ret;
2633         const char *msg = "";
2634
2635         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2636                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2637
2638         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2639
2640         ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty);
2641         return ret;
2642 }
2643
2644 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2645 {
2646         /*
2647          * FIXME: Here we have to actually print all the machines in this
2648          * session, not just the host...
2649          */
2650         return machine__fprintf(&session->machines.host, fp);
2651 }
2652
2653 struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2654                                               unsigned int type)
2655 {
2656         struct evsel *pos;
2657
2658         evlist__for_each_entry(session->evlist, pos) {
2659                 if (pos->core.attr.type == type)
2660                         return pos;
2661         }
2662         return NULL;
2663 }
2664
2665 int perf_session__cpu_bitmap(struct perf_session *session,
2666                              const char *cpu_list, unsigned long *cpu_bitmap)
2667 {
2668         int i, err = -1;
2669         struct perf_cpu_map *map;
2670         int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS);
2671
2672         for (i = 0; i < PERF_TYPE_MAX; ++i) {
2673                 struct evsel *evsel;
2674
2675                 evsel = perf_session__find_first_evtype(session, i);
2676                 if (!evsel)
2677                         continue;
2678
2679                 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2680                         pr_err("File does not contain CPU events. "
2681                                "Remove -C option to proceed.\n");
2682                         return -1;
2683                 }
2684         }
2685
2686         map = perf_cpu_map__new(cpu_list);
2687         if (map == NULL) {
2688                 pr_err("Invalid cpu_list\n");
2689                 return -1;
2690         }
2691
2692         for (i = 0; i < perf_cpu_map__nr(map); i++) {
2693                 struct perf_cpu cpu = perf_cpu_map__cpu(map, i);
2694
2695                 if (cpu.cpu >= nr_cpus) {
2696                         pr_err("Requested CPU %d too large. "
2697                                "Consider raising MAX_NR_CPUS\n", cpu.cpu);
2698                         goto out_delete_map;
2699                 }
2700
2701                 set_bit(cpu.cpu, cpu_bitmap);
2702         }
2703
2704         err = 0;
2705
2706 out_delete_map:
2707         perf_cpu_map__put(map);
2708         return err;
2709 }
2710
2711 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2712                                 bool full)
2713 {
2714         if (session == NULL || fp == NULL)
2715                 return;
2716
2717         fprintf(fp, "# ========\n");
2718         perf_header__fprintf_info(session, fp, full);
2719         fprintf(fp, "# ========\n#\n");
2720 }
2721
2722 int perf_event__process_id_index(struct perf_session *session,
2723                                  union perf_event *event)
2724 {
2725         struct evlist *evlist = session->evlist;
2726         struct perf_record_id_index *ie = &event->id_index;
2727         size_t i, nr, max_nr;
2728
2729         max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) /
2730                  sizeof(struct id_index_entry);
2731         nr = ie->nr;
2732         if (nr > max_nr)
2733                 return -EINVAL;
2734
2735         if (dump_trace)
2736                 fprintf(stdout, " nr: %zu\n", nr);
2737
2738         for (i = 0; i < nr; i++) {
2739                 struct id_index_entry *e = &ie->entries[i];
2740                 struct perf_sample_id *sid;
2741
2742                 if (dump_trace) {
2743                         fprintf(stdout, " ... id: %"PRI_lu64, e->id);
2744                         fprintf(stdout, "  idx: %"PRI_lu64, e->idx);
2745                         fprintf(stdout, "  cpu: %"PRI_ld64, e->cpu);
2746                         fprintf(stdout, "  tid: %"PRI_ld64"\n", e->tid);
2747                 }
2748
2749                 sid = evlist__id2sid(evlist, e->id);
2750                 if (!sid)
2751                         return -ENOENT;
2752                 sid->idx = e->idx;
2753                 sid->cpu.cpu = e->cpu;
2754                 sid->tid = e->tid;
2755         }
2756         return 0;
2757 }