tools/perf/util/session.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <errno.h>
   3 #include <signal.h>
   4 #include <inttypes.h>
   5 #include <linux/err.h>
   6 #include <linux/kernel.h>
   7 #include <linux/zalloc.h>
   8 #include <api/fs/fs.h>
   9
  10 #include <byteswap.h>
  11 #include <unistd.h>
  12 #include <sys/types.h>
  13 #include <sys/mman.h>
  14 #include <perf/cpumap.h>
  15
  16 #include "map_symbol.h"
  17 #include "branch.h"
  18 #include "debug.h"
  19 #include "env.h"
  20 #include "evlist.h"
  21 #include "evsel.h"
  22 #include "memswap.h"
  23 #include "map.h"
  24 #include "symbol.h"
  25 #include "session.h"
  26 #include "tool.h"
  27 #include "perf_regs.h"
  28 #include "asm/bug.h"
  29 #include "auxtrace.h"
  30 #include "thread.h"
  31 #include "thread-stack.h"
  32 #include "sample-raw.h"
  33 #include "stat.h"
  34 #include "tsc.h"
  35 #include "ui/progress.h"
  36 #include "util.h"
  37 #include "arch/common.h"
  38 #include "units.h"
  39 #include <internal/lib.h>
  40
  41 #ifdef HAVE_ZSTD_SUPPORT
  42 static int perf_session__process_compressed_event(struct perf_session *session,
  43                                                   union perf_event *event, u64 file_offset,
  44                                                   const char *file_path)
  45 {
  46         void *src;
  47         size_t decomp_size, src_size;
  48         u64 decomp_last_rem = 0;
  49         size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
  50         struct decomp *decomp, *decomp_last = session->active_decomp->decomp_last;
  51
  52         if (decomp_last) {
  53                 decomp_last_rem = decomp_last->size - decomp_last->head;
  54                 decomp_len += decomp_last_rem;
  55         }
  56
  57         mmap_len = sizeof(struct decomp) + decomp_len;
  58         decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
  59                       MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
  60         if (decomp == MAP_FAILED) {
  61                 pr_err("Couldn't allocate memory for decompression\n");
  62                 return -1;
  63         }
  64
  65         decomp->file_pos = file_offset;
  66         decomp->file_path = file_path;
  67         decomp->mmap_len = mmap_len;
  68         decomp->head = 0;
  69
  70         if (decomp_last_rem) {
  71                 memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
  72                 decomp->size = decomp_last_rem;
  73         }
  74
  75         src = (void *)event + sizeof(struct perf_record_compressed);
  76         src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
  77
  78         decomp_size = zstd_decompress_stream(session->active_decomp->zstd_decomp, src, src_size,
  79                                 &(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
  80         if (!decomp_size) {
  81                 munmap(decomp, mmap_len);
  82                 pr_err("Couldn't decompress data\n");
  83                 return -1;
  84         }
  85
  86         decomp->size += decomp_size;
  87
  88         if (session->active_decomp->decomp == NULL)
  89                 session->active_decomp->decomp = decomp;
  90         else
  91                 session->active_decomp->decomp_last->next = decomp;
  92
  93         session->active_decomp->decomp_last = decomp;
  94
  95         pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size);
  96
  97         return 0;
  98 }
  99 #else /* !HAVE_ZSTD_SUPPORT */
 100 #define perf_session__process_compressed_event perf_session__process_compressed_event_stub
 101 #endif
 102
 103 static int perf_session__deliver_event(struct perf_session *session,
 104                                        union perf_event *event,
 105                                        struct perf_tool *tool,
 106                                        u64 file_offset,
 107                                        const char *file_path);
 108
 109 static int perf_session__open(struct perf_session *session, int repipe_fd)
 110 {
 111         struct perf_data *data = session->data;
 112
 113         if (perf_session__read_header(session, repipe_fd) < 0) {
 114                 pr_err("incompatible file format (rerun with -v to learn more)\n");
 115                 return -1;
 116         }
 117
 118         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) {
 119                 /* Auxiliary events may reference exited threads, hold onto dead ones. */
 120                 symbol_conf.keep_exited_threads = true;
 121         }
 122
 123         if (perf_data__is_pipe(data))
 124                 return 0;
 125
 126         if (perf_header__has_feat(&session->header, HEADER_STAT))
 127                 return 0;
 128
 129         if (!evlist__valid_sample_type(session->evlist)) {
 130                 pr_err("non matching sample_type\n");
 131                 return -1;
 132         }
 133
 134         if (!evlist__valid_sample_id_all(session->evlist)) {
 135                 pr_err("non matching sample_id_all\n");
 136                 return -1;
 137         }
 138
 139         if (!evlist__valid_read_format(session->evlist)) {
 140                 pr_err("non matching read_format\n");
 141                 return -1;
 142         }
 143
 144         return 0;
 145 }
 146
 147 void perf_session__set_id_hdr_size(struct perf_session *session)
 148 {
 149         u16 id_hdr_size = evlist__id_hdr_size(session->evlist);
 150
 151         machines__set_id_hdr_size(&session->machines, id_hdr_size);
 152 }
 153
 154 int perf_session__create_kernel_maps(struct perf_session *session)
 155 {
 156         int ret = machine__create_kernel_maps(&session->machines.host);
 157
 158         if (ret >= 0)
 159                 ret = machines__create_guest_kernel_maps(&session->machines);
 160         return ret;
 161 }
 162
 163 static void perf_session__destroy_kernel_maps(struct perf_session *session)
 164 {
 165         machines__destroy_kernel_maps(&session->machines);
 166 }
 167
 168 static bool perf_session__has_comm_exec(struct perf_session *session)
 169 {
 170         struct evsel *evsel;
 171
 172         evlist__for_each_entry(session->evlist, evsel) {
 173                 if (evsel->core.attr.comm_exec)
 174                         return true;
 175         }
 176
 177         return false;
 178 }
 179
 180 static void perf_session__set_comm_exec(struct perf_session *session)
 181 {
 182         bool comm_exec = perf_session__has_comm_exec(session);
 183
 184         machines__set_comm_exec(&session->machines, comm_exec);
 185 }
 186
 187 static int ordered_events__deliver_event(struct ordered_events *oe,
 188                                          struct ordered_event *event)
 189 {
 190         struct perf_session *session = container_of(oe, struct perf_session,
 191                                                     ordered_events);
 192
 193         return perf_session__deliver_event(session, event->event,
 194                                            session->tool, event->file_offset,
 195                                            event->file_path);
 196 }
 197
 198 struct perf_session *__perf_session__new(struct perf_data *data,
 199                                          bool repipe, int repipe_fd,
 200                                          struct perf_tool *tool)
 201 {
 202         int ret = -ENOMEM;
 203         struct perf_session *session = zalloc(sizeof(*session));
 204
 205         if (!session)
 206                 goto out;
 207
 208         session->repipe = repipe;
 209         session->tool   = tool;
 210         session->decomp_data.zstd_decomp = &session->zstd_data;
 211         session->active_decomp = &session->decomp_data;
 212         INIT_LIST_HEAD(&session->auxtrace_index);
 213         machines__init(&session->machines);
 214         ordered_events__init(&session->ordered_events,
 215                              ordered_events__deliver_event, NULL);
 216
 217         perf_env__init(&session->header.env);
 218         if (data) {
 219                 ret = perf_data__open(data);
 220                 if (ret < 0)
 221                         goto out_delete;
 222
 223                 session->data = data;
 224
 225                 if (perf_data__is_read(data)) {
 226                         ret = perf_session__open(session, repipe_fd);
 227                         if (ret < 0)
 228                                 goto out_delete;
 229
 230                         /*
 231                          * set session attributes that are present in perf.data
 232                          * but not in pipe-mode.
 233                          */
 234                         if (!data->is_pipe) {
 235                                 perf_session__set_id_hdr_size(session);
 236                                 perf_session__set_comm_exec(session);
 237                         }
 238
 239                         evlist__init_trace_event_sample_raw(session->evlist);
 240
 241                         /* Open the directory data. */
 242                         if (data->is_dir) {
 243                                 ret = perf_data__open_dir(data);
 244                                 if (ret)
 245                                         goto out_delete;
 246                         }
 247
 248                         if (!symbol_conf.kallsyms_name &&
 249                             !symbol_conf.vmlinux_name)
 250                                 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
 251                 }
 252         } else  {
 253                 session->machines.host.env = &perf_env;
 254         }
 255
 256         session->machines.host.single_address_space =
 257                 perf_env__single_address_space(session->machines.host.env);
 258
 259         if (!data || perf_data__is_write(data)) {
 260                 /*
 261                  * In O_RDONLY mode this will be performed when reading the
 262                  * kernel MMAP event, in perf_event__process_mmap().
 263                  */
 264                 if (perf_session__create_kernel_maps(session) < 0)
 265                         pr_warning("Cannot read kernel map\n");
 266         }
 267
 268         /*
 269          * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
 270          * processed, so evlist__sample_id_all is not meaningful here.
 271          */
 272         if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
 273             tool->ordered_events && !evlist__sample_id_all(session->evlist)) {
 274                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 275                 tool->ordered_events = false;
 276         }
 277
 278         return session;
 279
 280  out_delete:
 281         perf_session__delete(session);
 282  out:
 283         return ERR_PTR(ret);
 284 }
 285
 286 static void perf_decomp__release_events(struct decomp *next)
 287 {
 288         struct decomp *decomp;
 289         size_t mmap_len;
 290
 291         do {
 292                 decomp = next;
 293                 if (decomp == NULL)
 294                         break;
 295                 next = decomp->next;
 296                 mmap_len = decomp->mmap_len;
 297                 munmap(decomp, mmap_len);
 298         } while (1);
 299 }
 300
 301 void perf_session__delete(struct perf_session *session)
 302 {
 303         if (session == NULL)
 304                 return;
 305         auxtrace__free(session);
 306         auxtrace_index__free(&session->auxtrace_index);
 307         perf_session__destroy_kernel_maps(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 #ifdef HAVE_LIBTRACEEVENT
 317         trace_event__cleanup(&session->tevent);
 318 #endif
 319         free(session);
 320 }
 321
 322 static int process_event_synth_tracing_data_stub(struct perf_session *session
 323                                                  __maybe_unused,
 324                                                  union perf_event *event
 325                                                  __maybe_unused)
 326 {
 327         dump_printf(": unhandled!\n");
 328         return 0;
 329 }
 330
 331 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 332                                          union perf_event *event __maybe_unused,
 333                                          struct evlist **pevlist
 334                                          __maybe_unused)
 335 {
 336         dump_printf(": unhandled!\n");
 337         return 0;
 338 }
 339
 340 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
 341                                                  union perf_event *event __maybe_unused,
 342                                                  struct evlist **pevlist
 343                                                  __maybe_unused)
 344 {
 345         if (dump_trace)
 346                 perf_event__fprintf_event_update(event, stdout);
 347
 348         dump_printf(": unhandled!\n");
 349         return 0;
 350 }
 351
 352 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 353                                      union perf_event *event __maybe_unused,
 354                                      struct perf_sample *sample __maybe_unused,
 355                                      struct evsel *evsel __maybe_unused,
 356                                      struct machine *machine __maybe_unused)
 357 {
 358         dump_printf(": unhandled!\n");
 359         return 0;
 360 }
 361
 362 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 363                               union perf_event *event __maybe_unused,
 364                               struct perf_sample *sample __maybe_unused,
 365                               struct machine *machine __maybe_unused)
 366 {
 367         dump_printf(": unhandled!\n");
 368         return 0;
 369 }
 370
 371 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 372                                        union perf_event *event __maybe_unused,
 373                                        struct ordered_events *oe __maybe_unused)
 374 {
 375         dump_printf(": unhandled!\n");
 376         return 0;
 377 }
 378
 379 static int skipn(int fd, off_t n)
 380 {
 381         char buf[4096];
 382         ssize_t ret;
 383
 384         while (n > 0) {
 385                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 386                 if (ret <= 0)
 387                         return ret;
 388                 n -= ret;
 389         }
 390
 391         return 0;
 392 }
 393
 394 static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
 395                                        union perf_event *event)
 396 {
 397         dump_printf(": unhandled!\n");
 398         if (perf_data__is_pipe(session->data))
 399                 skipn(perf_data__fd(session->data), event->auxtrace.size);
 400         return event->auxtrace.size;
 401 }
 402
 403 static int process_event_op2_stub(struct perf_session *session __maybe_unused,
 404                                   union perf_event *event __maybe_unused)
 405 {
 406         dump_printf(": unhandled!\n");
 407         return 0;
 408 }
 409
 410
 411 static
 412 int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
 413                                   union perf_event *event __maybe_unused)
 414 {
 415         if (dump_trace)
 416                 perf_event__fprintf_thread_map(event, stdout);
 417
 418         dump_printf(": unhandled!\n");
 419         return 0;
 420 }
 421
 422 static
 423 int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
 424                                union perf_event *event __maybe_unused)
 425 {
 426         if (dump_trace)
 427                 perf_event__fprintf_cpu_map(event, stdout);
 428
 429         dump_printf(": unhandled!\n");
 430         return 0;
 431 }
 432
 433 static
 434 int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
 435                                    union perf_event *event __maybe_unused)
 436 {
 437         if (dump_trace)
 438                 perf_event__fprintf_stat_config(event, stdout);
 439
 440         dump_printf(": unhandled!\n");
 441         return 0;
 442 }
 443
 444 static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
 445                              union perf_event *event)
 446 {
 447         if (dump_trace)
 448                 perf_event__fprintf_stat(event, stdout);
 449
 450         dump_printf(": unhandled!\n");
 451         return 0;
 452 }
 453
 454 static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
 455                                    union perf_event *event)
 456 {
 457         if (dump_trace)
 458                 perf_event__fprintf_stat_round(event, stdout);
 459
 460         dump_printf(": unhandled!\n");
 461         return 0;
 462 }
 463
 464 static int process_event_time_conv_stub(struct perf_session *perf_session __maybe_unused,
 465                                         union perf_event *event)
 466 {
 467         if (dump_trace)
 468                 perf_event__fprintf_time_conv(event, stdout);
 469
 470         dump_printf(": unhandled!\n");
 471         return 0;
 472 }
 473
 474 static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
 475                                                        union perf_event *event __maybe_unused,
 476                                                        u64 file_offset __maybe_unused,
 477                                                        const char *file_path __maybe_unused)
 478 {
 479        dump_printf(": unhandled!\n");
 480        return 0;
 481 }
 482
 483 void perf_tool__fill_defaults(struct perf_tool *tool)
 484 {
 485         if (tool->sample == NULL)
 486                 tool->sample = process_event_sample_stub;
 487         if (tool->mmap == NULL)
 488                 tool->mmap = process_event_stub;
 489         if (tool->mmap2 == NULL)
 490                 tool->mmap2 = process_event_stub;
 491         if (tool->comm == NULL)
 492                 tool->comm = process_event_stub;
 493         if (tool->namespaces == NULL)
 494                 tool->namespaces = process_event_stub;
 495         if (tool->cgroup == NULL)
 496                 tool->cgroup = process_event_stub;
 497         if (tool->fork == NULL)
 498                 tool->fork = process_event_stub;
 499         if (tool->exit == NULL)
 500                 tool->exit = process_event_stub;
 501         if (tool->lost == NULL)
 502                 tool->lost = perf_event__process_lost;
 503         if (tool->lost_samples == NULL)
 504                 tool->lost_samples = perf_event__process_lost_samples;
 505         if (tool->aux == NULL)
 506                 tool->aux = perf_event__process_aux;
 507         if (tool->itrace_start == NULL)
 508                 tool->itrace_start = perf_event__process_itrace_start;
 509         if (tool->context_switch == NULL)
 510                 tool->context_switch = perf_event__process_switch;
 511         if (tool->ksymbol == NULL)
 512                 tool->ksymbol = perf_event__process_ksymbol;
 513         if (tool->bpf == NULL)
 514                 tool->bpf = perf_event__process_bpf;
 515         if (tool->text_poke == NULL)
 516                 tool->text_poke = perf_event__process_text_poke;
 517         if (tool->aux_output_hw_id == NULL)
 518                 tool->aux_output_hw_id = perf_event__process_aux_output_hw_id;
 519         if (tool->read == NULL)
 520                 tool->read = process_event_sample_stub;
 521         if (tool->throttle == NULL)
 522                 tool->throttle = process_event_stub;
 523         if (tool->unthrottle == NULL)
 524                 tool->unthrottle = process_event_stub;
 525         if (tool->attr == NULL)
 526                 tool->attr = process_event_synth_attr_stub;
 527         if (tool->event_update == NULL)
 528                 tool->event_update = process_event_synth_event_update_stub;
 529         if (tool->tracing_data == NULL)
 530                 tool->tracing_data = process_event_synth_tracing_data_stub;
 531         if (tool->build_id == NULL)
 532                 tool->build_id = process_event_op2_stub;
 533         if (tool->finished_round == NULL) {
 534                 if (tool->ordered_events)
 535                         tool->finished_round = perf_event__process_finished_round;
 536                 else
 537                         tool->finished_round = process_finished_round_stub;
 538         }
 539         if (tool->id_index == NULL)
 540                 tool->id_index = process_event_op2_stub;
 541         if (tool->auxtrace_info == NULL)
 542                 tool->auxtrace_info = process_event_op2_stub;
 543         if (tool->auxtrace == NULL)
 544                 tool->auxtrace = process_event_auxtrace_stub;
 545         if (tool->auxtrace_error == NULL)
 546                 tool->auxtrace_error = process_event_op2_stub;
 547         if (tool->thread_map == NULL)
 548                 tool->thread_map = process_event_thread_map_stub;
 549         if (tool->cpu_map == NULL)
 550                 tool->cpu_map = process_event_cpu_map_stub;
 551         if (tool->stat_config == NULL)
 552                 tool->stat_config = process_event_stat_config_stub;
 553         if (tool->stat == NULL)
 554                 tool->stat = process_stat_stub;
 555         if (tool->stat_round == NULL)
 556                 tool->stat_round = process_stat_round_stub;
 557         if (tool->time_conv == NULL)
 558                 tool->time_conv = process_event_time_conv_stub;
 559         if (tool->feature == NULL)
 560                 tool->feature = process_event_op2_stub;
 561         if (tool->compressed == NULL)
 562                 tool->compressed = perf_session__process_compressed_event;
 563         if (tool->finished_init == NULL)
 564                 tool->finished_init = process_event_op2_stub;
 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 -= perf_record_header_attr_id(event) - (void *)event;
 842         mem_bswap_64(perf_record_header_attr_id(event), 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         if (event->auxtrace_error.fmt >= 2) {
 901                 event->auxtrace_error.machine_pid = bswap_32(event->auxtrace_error.machine_pid);
 902                 event->auxtrace_error.vcpu = bswap_32(event->auxtrace_error.vcpu);
 903         }
 904 }
 905
 906 static void perf_event__thread_map_swap(union perf_event *event,
 907                                         bool sample_id_all __maybe_unused)
 908 {
 909         unsigned i;
 910
 911         event->thread_map.nr = bswap_64(event->thread_map.nr);
 912
 913         for (i = 0; i < event->thread_map.nr; i++)
 914                 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
 915 }
 916
 917 static void perf_event__cpu_map_swap(union perf_event *event,
 918                                      bool sample_id_all __maybe_unused)
 919 {
 920         struct perf_record_cpu_map_data *data = &event->cpu_map.data;
 921
 922         data->type = bswap_16(data->type);
 923
 924         switch (data->type) {
 925         case PERF_CPU_MAP__CPUS:
 926                 data->cpus_data.nr = bswap_16(data->cpus_data.nr);
 927
 928                 for (unsigned i = 0; i < data->cpus_data.nr; i++)
 929                         data->cpus_data.cpu[i] = bswap_16(data->cpus_data.cpu[i]);
 930                 break;
 931         case PERF_CPU_MAP__MASK:
 932                 data->mask32_data.long_size = bswap_16(data->mask32_data.long_size);
 933
 934                 switch (data->mask32_data.long_size) {
 935                 case 4:
 936                         data->mask32_data.nr = bswap_16(data->mask32_data.nr);
 937                         for (unsigned i = 0; i < data->mask32_data.nr; i++)
 938                                 data->mask32_data.mask[i] = bswap_32(data->mask32_data.mask[i]);
 939                         break;
 940                 case 8:
 941                         data->mask64_data.nr = bswap_16(data->mask64_data.nr);
 942                         for (unsigned i = 0; i < data->mask64_data.nr; i++)
 943                                 data->mask64_data.mask[i] = bswap_64(data->mask64_data.mask[i]);
 944                         break;
 945                 default:
 946                         pr_err("cpu_map swap: unsupported long size\n");
 947                 }
 948                 break;
 949         case PERF_CPU_MAP__RANGE_CPUS:
 950                 data->range_cpu_data.start_cpu = bswap_16(data->range_cpu_data.start_cpu);
 951                 data->range_cpu_data.end_cpu = bswap_16(data->range_cpu_data.end_cpu);
 952                 break;
 953         default:
 954                 break;
 955         }
 956 }
 957
 958 static void perf_event__stat_config_swap(union perf_event *event,
 959                                          bool sample_id_all __maybe_unused)
 960 {
 961         u64 size;
 962
 963         size  = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]);
 964         size += 1; /* nr item itself */
 965         mem_bswap_64(&event->stat_config.nr, size);
 966 }
 967
 968 static void perf_event__stat_swap(union perf_event *event,
 969                                   bool sample_id_all __maybe_unused)
 970 {
 971         event->stat.id     = bswap_64(event->stat.id);
 972         event->stat.thread = bswap_32(event->stat.thread);
 973         event->stat.cpu    = bswap_32(event->stat.cpu);
 974         event->stat.val    = bswap_64(event->stat.val);
 975         event->stat.ena    = bswap_64(event->stat.ena);
 976         event->stat.run    = bswap_64(event->stat.run);
 977 }
 978
 979 static void perf_event__stat_round_swap(union perf_event *event,
 980                                         bool sample_id_all __maybe_unused)
 981 {
 982         event->stat_round.type = bswap_64(event->stat_round.type);
 983         event->stat_round.time = bswap_64(event->stat_round.time);
 984 }
 985
 986 static void perf_event__time_conv_swap(union perf_event *event,
 987                                        bool sample_id_all __maybe_unused)
 988 {
 989         event->time_conv.time_shift = bswap_64(event->time_conv.time_shift);
 990         event->time_conv.time_mult  = bswap_64(event->time_conv.time_mult);
 991         event->time_conv.time_zero  = bswap_64(event->time_conv.time_zero);
 992
 993         if (event_contains(event->time_conv, time_cycles)) {
 994                 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles);
 995                 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask);
 996         }
 997 }
 998
 999 typedef void (*perf_event__swap_op)(union perf_event *event,
1000                                     bool sample_id_all);
1001
1002 static perf_event__swap_op perf_event__swap_ops[] = {
1003         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
1004         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
1005         [PERF_RECORD_COMM]                = perf_event__comm_swap,
1006         [PERF_RECORD_FORK]                = perf_event__task_swap,
1007         [PERF_RECORD_EXIT]                = perf_event__task_swap,
1008         [PERF_RECORD_LOST]                = perf_event__all64_swap,
1009         [PERF_RECORD_READ]                = perf_event__read_swap,
1010         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
1011         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
1012         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
1013         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
1014         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
1015         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
1016         [PERF_RECORD_SWITCH]              = perf_event__switch_swap,
1017         [PERF_RECORD_SWITCH_CPU_WIDE]     = perf_event__switch_swap,
1018         [PERF_RECORD_NAMESPACES]          = perf_event__namespaces_swap,
1019         [PERF_RECORD_CGROUP]              = perf_event__cgroup_swap,
1020         [PERF_RECORD_TEXT_POKE]           = perf_event__text_poke_swap,
1021         [PERF_RECORD_AUX_OUTPUT_HW_ID]    = perf_event__all64_swap,
1022         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
1023         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
1024         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
1025         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
1026         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
1027         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
1028         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
1029         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
1030         [PERF_RECORD_THREAD_MAP]          = perf_event__thread_map_swap,
1031         [PERF_RECORD_CPU_MAP]             = perf_event__cpu_map_swap,
1032         [PERF_RECORD_STAT_CONFIG]         = perf_event__stat_config_swap,
1033         [PERF_RECORD_STAT]                = perf_event__stat_swap,
1034         [PERF_RECORD_STAT_ROUND]          = perf_event__stat_round_swap,
1035         [PERF_RECORD_EVENT_UPDATE]        = perf_event__event_update_swap,
1036         [PERF_RECORD_TIME_CONV]           = perf_event__time_conv_swap,
1037         [PERF_RECORD_HEADER_MAX]          = NULL,
1038 };
1039
1040 /*
1041  * When perf record finishes a pass on every buffers, it records this pseudo
1042  * event.
1043  * We record the max timestamp t found in the pass n.
1044  * Assuming these timestamps are monotonic across cpus, we know that if
1045  * a buffer still has events with timestamps below t, they will be all
1046  * available and then read in the pass n + 1.
1047  * Hence when we start to read the pass n + 2, we can safely flush every
1048  * events with timestamps below t.
1049  *
1050  *    ============ PASS n =================
1051  *       CPU 0         |   CPU 1
1052  *                     |
1053  *    cnt1 timestamps  |   cnt2 timestamps
1054  *          1          |         2
1055  *          2          |         3
1056  *          -          |         4  <--- max recorded
1057  *
1058  *    ============ PASS n + 1 ==============
1059  *       CPU 0         |   CPU 1
1060  *                     |
1061  *    cnt1 timestamps  |   cnt2 timestamps
1062  *          3          |         5
1063  *          4          |         6
1064  *          5          |         7 <---- max recorded
1065  *
1066  *      Flush every events below timestamp 4
1067  *
1068  *    ============ PASS n + 2 ==============
1069  *       CPU 0         |   CPU 1
1070  *                     |
1071  *    cnt1 timestamps  |   cnt2 timestamps
1072  *          6          |         8
1073  *          7          |         9
1074  *          -          |         10
1075  *
1076  *      Flush every events below timestamp 7
1077  *      etc...
1078  */
1079 int perf_event__process_finished_round(struct perf_tool *tool __maybe_unused,
1080                                        union perf_event *event __maybe_unused,
1081                                        struct ordered_events *oe)
1082 {
1083         if (dump_trace)
1084                 fprintf(stdout, "\n");
1085         return ordered_events__flush(oe, OE_FLUSH__ROUND);
1086 }
1087
1088 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
1089                               u64 timestamp, u64 file_offset, const char *file_path)
1090 {
1091         return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset, file_path);
1092 }
1093
1094 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
1095 {
1096         struct ip_callchain *callchain = sample->callchain;
1097         struct branch_stack *lbr_stack = sample->branch_stack;
1098         struct branch_entry *entries = perf_sample__branch_entries(sample);
1099         u64 kernel_callchain_nr = callchain->nr;
1100         unsigned int i;
1101
1102         for (i = 0; i < kernel_callchain_nr; i++) {
1103                 if (callchain->ips[i] == PERF_CONTEXT_USER)
1104                         break;
1105         }
1106
1107         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
1108                 u64 total_nr;
1109                 /*
1110                  * LBR callstack can only get user call chain,
1111                  * i is kernel call chain number,
1112                  * 1 is PERF_CONTEXT_USER.
1113                  *
1114                  * The user call chain is stored in LBR registers.
1115                  * LBR are pair registers. The caller is stored
1116                  * in "from" register, while the callee is stored
1117                  * in "to" register.
1118                  * For example, there is a call stack
1119                  * "A"->"B"->"C"->"D".
1120                  * The LBR registers will be recorded like
1121                  * "C"->"D", "B"->"C", "A"->"B".
1122                  * So only the first "to" register and all "from"
1123                  * registers are needed to construct the whole stack.
1124                  */
1125                 total_nr = i + 1 + lbr_stack->nr + 1;
1126                 kernel_callchain_nr = i + 1;
1127
1128                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
1129
1130                 for (i = 0; i < kernel_callchain_nr; i++)
1131                         printf("..... %2d: %016" PRIx64 "\n",
1132                                i, callchain->ips[i]);
1133
1134                 printf("..... %2d: %016" PRIx64 "\n",
1135                        (int)(kernel_callchain_nr), entries[0].to);
1136                 for (i = 0; i < lbr_stack->nr; i++)
1137                         printf("..... %2d: %016" PRIx64 "\n",
1138                                (int)(i + kernel_callchain_nr + 1), entries[i].from);
1139         }
1140 }
1141
1142 static void callchain__printf(struct evsel *evsel,
1143                               struct perf_sample *sample)
1144 {
1145         unsigned int i;
1146         struct ip_callchain *callchain = sample->callchain;
1147
1148         if (evsel__has_branch_callstack(evsel))
1149                 callchain__lbr_callstack_printf(sample);
1150
1151         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
1152
1153         for (i = 0; i < callchain->nr; i++)
1154                 printf("..... %2d: %016" PRIx64 "\n",
1155                        i, callchain->ips[i]);
1156 }
1157
1158 static void branch_stack__printf(struct perf_sample *sample,
1159                                  struct evsel *evsel)
1160 {
1161         struct branch_entry *entries = perf_sample__branch_entries(sample);
1162         bool callstack = evsel__has_branch_callstack(evsel);
1163         u64 *branch_stack_cntr = sample->branch_stack_cntr;
1164         struct perf_env *env = evsel__env(evsel);
1165         uint64_t i;
1166
1167         if (!callstack) {
1168                 printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr);
1169         } else {
1170                 /* the reason of adding 1 to nr is because after expanding
1171                  * branch stack it generates nr + 1 callstack records. e.g.,
1172                  *         B()->C()
1173                  *         A()->B()
1174                  * the final callstack should be:
1175                  *         C()
1176                  *         B()
1177                  *         A()
1178                  */
1179                 printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1);
1180         }
1181
1182         for (i = 0; i < sample->branch_stack->nr; i++) {
1183                 struct branch_entry *e = &entries[i];
1184
1185                 if (!callstack) {
1186                         printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s %s\n",
1187                                 i, e->from, e->to,
1188                                 (unsigned short)e->flags.cycles,
1189                                 e->flags.mispred ? "M" : " ",
1190                                 e->flags.predicted ? "P" : " ",
1191                                 e->flags.abort ? "A" : " ",
1192                                 e->flags.in_tx ? "T" : " ",
1193                                 (unsigned)e->flags.reserved,
1194                                 get_branch_type(e),
1195                                 e->flags.spec ? branch_spec_desc(e->flags.spec) : "");
1196                 } else {
1197                         if (i == 0) {
1198                                 printf("..... %2"PRIu64": %016" PRIx64 "\n"
1199                                        "..... %2"PRIu64": %016" PRIx64 "\n",
1200                                                 i, e->to, i+1, e->from);
1201                         } else {
1202                                 printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from);
1203                         }
1204                 }
1205         }
1206
1207         if (branch_stack_cntr) {
1208                 printf("... branch stack counters: nr:%" PRIu64 " (counter width: %u max counter nr:%u)\n",
1209                         sample->branch_stack->nr, env->br_cntr_width, env->br_cntr_nr);
1210                 for (i = 0; i < sample->branch_stack->nr; i++)
1211                         printf("..... %2"PRIu64": %016" PRIx64 "\n", i, branch_stack_cntr[i]);
1212         }
1213 }
1214
1215 static void regs_dump__printf(u64 mask, u64 *regs, const char *arch)
1216 {
1217         unsigned rid, i = 0;
1218
1219         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
1220                 u64 val = regs[i++];
1221
1222                 printf(".... %-5s 0x%016" PRIx64 "\n",
1223                        perf_reg_name(rid, arch), val);
1224         }
1225 }
1226
1227 static const char *regs_abi[] = {
1228         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
1229         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
1230         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
1231 };
1232
1233 static inline const char *regs_dump_abi(struct regs_dump *d)
1234 {
1235         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
1236                 return "unknown";
1237
1238         return regs_abi[d->abi];
1239 }
1240
1241 static void regs__printf(const char *type, struct regs_dump *regs, const char *arch)
1242 {
1243         u64 mask = regs->mask;
1244
1245         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
1246                type,
1247                mask,
1248                regs_dump_abi(regs));
1249
1250         regs_dump__printf(mask, regs->regs, arch);
1251 }
1252
1253 static void regs_user__printf(struct perf_sample *sample, const char *arch)
1254 {
1255         struct regs_dump *user_regs = &sample->user_regs;
1256
1257         if (user_regs->regs)
1258                 regs__printf("user", user_regs, arch);
1259 }
1260
1261 static void regs_intr__printf(struct perf_sample *sample, const char *arch)
1262 {
1263         struct regs_dump *intr_regs = &sample->intr_regs;
1264
1265         if (intr_regs->regs)
1266                 regs__printf("intr", intr_regs, arch);
1267 }
1268
1269 static void stack_user__printf(struct stack_dump *dump)
1270 {
1271         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1272                dump->size, dump->offset);
1273 }
1274
1275 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample)
1276 {
1277         u64 sample_type = __evlist__combined_sample_type(evlist);
1278
1279         if (event->header.type != PERF_RECORD_SAMPLE &&
1280             !evlist__sample_id_all(evlist)) {
1281                 fputs("-1 -1 ", stdout);
1282                 return;
1283         }
1284
1285         if ((sample_type & PERF_SAMPLE_CPU))
1286                 printf("%u ", sample->cpu);
1287
1288         if (sample_type & PERF_SAMPLE_TIME)
1289                 printf("%" PRIu64 " ", sample->time);
1290 }
1291
1292 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1293 {
1294         printf("... sample_read:\n");
1295
1296         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1297                 printf("...... time enabled %016" PRIx64 "\n",
1298                        sample->read.time_enabled);
1299
1300         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1301                 printf("...... time running %016" PRIx64 "\n",
1302                        sample->read.time_running);
1303
1304         if (read_format & PERF_FORMAT_GROUP) {
1305                 struct sample_read_value *value = sample->read.group.values;
1306
1307                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1308
1309                 sample_read_group__for_each(value, sample->read.group.nr, read_format) {
1310                         printf("..... id %016" PRIx64
1311                                ", value %016" PRIx64,
1312                                value->id, value->value);
1313                         if (read_format & PERF_FORMAT_LOST)
1314                                 printf(", lost %" PRIu64, value->lost);
1315                         printf("\n");
1316                 }
1317         } else {
1318                 printf("..... id %016" PRIx64 ", value %016" PRIx64,
1319                         sample->read.one.id, sample->read.one.value);
1320                 if (read_format & PERF_FORMAT_LOST)
1321                         printf(", lost %" PRIu64, sample->read.one.lost);
1322                 printf("\n");
1323         }
1324 }
1325
1326 static void dump_event(struct evlist *evlist, union perf_event *event,
1327                        u64 file_offset, struct perf_sample *sample,
1328                        const char *file_path)
1329 {
1330         if (!dump_trace)
1331                 return;
1332
1333         printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n",
1334                file_offset, file_path, event->header.size, event->header.type);
1335
1336         trace_event(event);
1337         if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
1338                 evlist->trace_event_sample_raw(evlist, event, sample);
1339
1340         if (sample)
1341                 evlist__print_tstamp(evlist, event, sample);
1342
1343         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1344                event->header.size, perf_event__name(event->header.type));
1345 }
1346
1347 char *get_page_size_name(u64 size, char *str)
1348 {
1349         if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size))
1350                 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A");
1351
1352         return str;
1353 }
1354
1355 static void dump_sample(struct evsel *evsel, union perf_event *event,
1356                         struct perf_sample *sample, const char *arch)
1357 {
1358         u64 sample_type;
1359         char str[PAGE_SIZE_NAME_LEN];
1360
1361         if (!dump_trace)
1362                 return;
1363
1364         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1365                event->header.misc, sample->pid, sample->tid, sample->ip,
1366                sample->period, sample->addr);
1367
1368         sample_type = evsel->core.attr.sample_type;
1369
1370         if (evsel__has_callchain(evsel))
1371                 callchain__printf(evsel, sample);
1372
1373         if (evsel__has_br_stack(evsel))
1374                 branch_stack__printf(sample, evsel);
1375
1376         if (sample_type & PERF_SAMPLE_REGS_USER)
1377                 regs_user__printf(sample, arch);
1378
1379         if (sample_type & PERF_SAMPLE_REGS_INTR)
1380                 regs_intr__printf(sample, arch);
1381
1382         if (sample_type & PERF_SAMPLE_STACK_USER)
1383                 stack_user__printf(&sample->user_stack);
1384
1385         if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) {
1386                 printf("... weight: %" PRIu64 "", sample->weight);
1387                         if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) {
1388                                 printf(",0x%"PRIx16"", sample->ins_lat);
1389                                 printf(",0x%"PRIx16"", sample->p_stage_cyc);
1390                         }
1391                 printf("\n");
1392         }
1393
1394         if (sample_type & PERF_SAMPLE_DATA_SRC)
1395                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1396
1397         if (sample_type & PERF_SAMPLE_PHYS_ADDR)
1398                 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
1399
1400         if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)
1401                 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str));
1402
1403         if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)
1404                 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str));
1405
1406         if (sample_type & PERF_SAMPLE_TRANSACTION)
1407                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1408
1409         if (sample_type & PERF_SAMPLE_READ)
1410                 sample_read__printf(sample, evsel->core.attr.read_format);
1411 }
1412
1413 static void dump_read(struct evsel *evsel, union perf_event *event)
1414 {
1415         struct perf_record_read *read_event = &event->read;
1416         u64 read_format;
1417
1418         if (!dump_trace)
1419                 return;
1420
1421         printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
1422                evsel__name(evsel), event->read.value);
1423
1424         if (!evsel)
1425                 return;
1426
1427         read_format = evsel->core.attr.read_format;
1428
1429         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1430                 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
1431
1432         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1433                 printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
1434
1435         if (read_format & PERF_FORMAT_ID)
1436                 printf("... id           : %" PRI_lu64 "\n", read_event->id);
1437
1438         if (read_format & PERF_FORMAT_LOST)
1439                 printf("... lost         : %" PRI_lu64 "\n", read_event->lost);
1440 }
1441
1442 static struct machine *machines__find_for_cpumode(struct machines *machines,
1443                                                union perf_event *event,
1444                                                struct perf_sample *sample)
1445 {
1446         if (perf_guest &&
1447             ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1448              (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1449                 u32 pid;
1450
1451                 if (sample->machine_pid)
1452                         pid = sample->machine_pid;
1453                 else if (event->header.type == PERF_RECORD_MMAP
1454                     || event->header.type == PERF_RECORD_MMAP2)
1455                         pid = event->mmap.pid;
1456                 else
1457                         pid = sample->pid;
1458
1459                 /*
1460                  * Guest code machine is created as needed and does not use
1461                  * DEFAULT_GUEST_KERNEL_ID.
1462                  */
1463                 if (symbol_conf.guest_code)
1464                         return machines__findnew(machines, pid);
1465
1466                 return machines__find_guest(machines, pid);
1467         }
1468
1469         return &machines->host;
1470 }
1471
1472 static int deliver_sample_value(struct evlist *evlist,
1473                                 struct perf_tool *tool,
1474                                 union perf_event *event,
1475                                 struct perf_sample *sample,
1476                                 struct sample_read_value *v,
1477                                 struct machine *machine)
1478 {
1479         struct perf_sample_id *sid = evlist__id2sid(evlist, v->id);
1480         struct evsel *evsel;
1481
1482         if (sid) {
1483                 sample->id     = v->id;
1484                 sample->period = v->value - sid->period;
1485                 sid->period    = v->value;
1486         }
1487
1488         if (!sid || sid->evsel == NULL) {
1489                 ++evlist->stats.nr_unknown_id;
1490                 return 0;
1491         }
1492
1493         /*
1494          * There's no reason to deliver sample
1495          * for zero period, bail out.
1496          */
1497         if (!sample->period)
1498                 return 0;
1499
1500         evsel = container_of(sid->evsel, struct evsel, core);
1501         return tool->sample(tool, event, sample, evsel, machine);
1502 }
1503
1504 static int deliver_sample_group(struct evlist *evlist,
1505                                 struct perf_tool *tool,
1506                                 union  perf_event *event,
1507                                 struct perf_sample *sample,
1508                                 struct machine *machine,
1509                                 u64 read_format)
1510 {
1511         int ret = -EINVAL;
1512         struct sample_read_value *v = sample->read.group.values;
1513
1514         sample_read_group__for_each(v, sample->read.group.nr, read_format) {
1515                 ret = deliver_sample_value(evlist, tool, event, sample, v,
1516                                            machine);
1517                 if (ret)
1518                         break;
1519         }
1520
1521         return ret;
1522 }
1523
1524 static int evlist__deliver_sample(struct evlist *evlist, struct perf_tool *tool,
1525                                   union  perf_event *event, struct perf_sample *sample,
1526                                   struct evsel *evsel, struct machine *machine)
1527 {
1528         /* We know evsel != NULL. */
1529         u64 sample_type = evsel->core.attr.sample_type;
1530         u64 read_format = evsel->core.attr.read_format;
1531
1532         /* Standard sample delivery. */
1533         if (!(sample_type & PERF_SAMPLE_READ))
1534                 return tool->sample(tool, event, sample, evsel, machine);
1535
1536         /* For PERF_SAMPLE_READ we have either single or group mode. */
1537         if (read_format & PERF_FORMAT_GROUP)
1538                 return deliver_sample_group(evlist, tool, event, sample,
1539                                             machine, read_format);
1540         else
1541                 return deliver_sample_value(evlist, tool, event, sample,
1542                                             &sample->read.one, machine);
1543 }
1544
1545 static int machines__deliver_event(struct machines *machines,
1546                                    struct evlist *evlist,
1547                                    union perf_event *event,
1548                                    struct perf_sample *sample,
1549                                    struct perf_tool *tool, u64 file_offset,
1550                                    const char *file_path)
1551 {
1552         struct evsel *evsel;
1553         struct machine *machine;
1554
1555         dump_event(evlist, event, file_offset, sample, file_path);
1556
1557         evsel = evlist__id2evsel(evlist, sample->id);
1558
1559         machine = machines__find_for_cpumode(machines, event, sample);
1560
1561         switch (event->header.type) {
1562         case PERF_RECORD_SAMPLE:
1563                 if (evsel == NULL) {
1564                         ++evlist->stats.nr_unknown_id;
1565                         return 0;
1566                 }
1567                 if (machine == NULL) {
1568                         ++evlist->stats.nr_unprocessable_samples;
1569                         dump_sample(evsel, event, sample, perf_env__arch(NULL));
1570                         return 0;
1571                 }
1572                 dump_sample(evsel, event, sample, perf_env__arch(machine->env));
1573                 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1574         case PERF_RECORD_MMAP:
1575                 return tool->mmap(tool, event, sample, machine);
1576         case PERF_RECORD_MMAP2:
1577                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1578                         ++evlist->stats.nr_proc_map_timeout;
1579                 return tool->mmap2(tool, event, sample, machine);
1580         case PERF_RECORD_COMM:
1581                 return tool->comm(tool, event, sample, machine);
1582         case PERF_RECORD_NAMESPACES:
1583                 return tool->namespaces(tool, event, sample, machine);
1584         case PERF_RECORD_CGROUP:
1585                 return tool->cgroup(tool, event, sample, machine);
1586         case PERF_RECORD_FORK:
1587                 return tool->fork(tool, event, sample, machine);
1588         case PERF_RECORD_EXIT:
1589                 return tool->exit(tool, event, sample, machine);
1590         case PERF_RECORD_LOST:
1591                 if (tool->lost == perf_event__process_lost)
1592                         evlist->stats.total_lost += event->lost.lost;
1593                 return tool->lost(tool, event, sample, machine);
1594         case PERF_RECORD_LOST_SAMPLES:
1595                 if (tool->lost_samples == perf_event__process_lost_samples &&
1596                     !(event->header.misc & PERF_RECORD_MISC_LOST_SAMPLES_BPF))
1597                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1598                 return tool->lost_samples(tool, event, sample, machine);
1599         case PERF_RECORD_READ:
1600                 dump_read(evsel, event);
1601                 return tool->read(tool, event, sample, evsel, machine);
1602         case PERF_RECORD_THROTTLE:
1603                 return tool->throttle(tool, event, sample, machine);
1604         case PERF_RECORD_UNTHROTTLE:
1605                 return tool->unthrottle(tool, event, sample, machine);
1606         case PERF_RECORD_AUX:
1607                 if (tool->aux == perf_event__process_aux) {
1608                         if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1609                                 evlist->stats.total_aux_lost += 1;
1610                         if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1611                                 evlist->stats.total_aux_partial += 1;
1612                         if (event->aux.flags & PERF_AUX_FLAG_COLLISION)
1613                                 evlist->stats.total_aux_collision += 1;
1614                 }
1615                 return tool->aux(tool, event, sample, machine);
1616         case PERF_RECORD_ITRACE_START:
1617                 return tool->itrace_start(tool, event, sample, machine);
1618         case PERF_RECORD_SWITCH:
1619         case PERF_RECORD_SWITCH_CPU_WIDE:
1620                 return tool->context_switch(tool, event, sample, machine);
1621         case PERF_RECORD_KSYMBOL:
1622                 return tool->ksymbol(tool, event, sample, machine);
1623         case PERF_RECORD_BPF_EVENT:
1624                 return tool->bpf(tool, event, sample, machine);
1625         case PERF_RECORD_TEXT_POKE:
1626                 return tool->text_poke(tool, event, sample, machine);
1627         case PERF_RECORD_AUX_OUTPUT_HW_ID:
1628                 return tool->aux_output_hw_id(tool, event, sample, machine);
1629         default:
1630                 ++evlist->stats.nr_unknown_events;
1631                 return -1;
1632         }
1633 }
1634
1635 static int perf_session__deliver_event(struct perf_session *session,
1636                                        union perf_event *event,
1637                                        struct perf_tool *tool,
1638                                        u64 file_offset,
1639                                        const char *file_path)
1640 {
1641         struct perf_sample sample;
1642         int ret = evlist__parse_sample(session->evlist, event, &sample);
1643
1644         if (ret) {
1645                 pr_err("Can't parse sample, err = %d\n", ret);
1646                 return ret;
1647         }
1648
1649         ret = auxtrace__process_event(session, event, &sample, tool);
1650         if (ret < 0)
1651                 return ret;
1652         if (ret > 0)
1653                 return 0;
1654
1655         ret = machines__deliver_event(&session->machines, session->evlist,
1656                                       event, &sample, tool, file_offset, file_path);
1657
1658         if (dump_trace && sample.aux_sample.size)
1659                 auxtrace__dump_auxtrace_sample(session, &sample);
1660
1661         return ret;
1662 }
1663
1664 static s64 perf_session__process_user_event(struct perf_session *session,
1665                                             union perf_event *event,
1666                                             u64 file_offset,
1667                                             const char *file_path)
1668 {
1669         struct ordered_events *oe = &session->ordered_events;
1670         struct perf_tool *tool = session->tool;
1671         struct perf_sample sample = { .time = 0, };
1672         int fd = perf_data__fd(session->data);
1673         int err;
1674
1675         if (event->header.type != PERF_RECORD_COMPRESSED ||
1676             tool->compressed == perf_session__process_compressed_event_stub)
1677                 dump_event(session->evlist, event, file_offset, &sample, file_path);
1678
1679         /* These events are processed right away */
1680         switch (event->header.type) {
1681         case PERF_RECORD_HEADER_ATTR:
1682                 err = tool->attr(tool, event, &session->evlist);
1683                 if (err == 0) {
1684                         perf_session__set_id_hdr_size(session);
1685                         perf_session__set_comm_exec(session);
1686                 }
1687                 return err;
1688         case PERF_RECORD_EVENT_UPDATE:
1689                 return tool->event_update(tool, event, &session->evlist);
1690         case PERF_RECORD_HEADER_EVENT_TYPE:
1691                 /*
1692                  * Deprecated, but we need to handle it for sake
1693                  * of old data files create in pipe mode.
1694                  */
1695                 return 0;
1696         case PERF_RECORD_HEADER_TRACING_DATA:
1697                 /*
1698                  * Setup for reading amidst mmap, but only when we
1699                  * are in 'file' mode. The 'pipe' fd is in proper
1700                  * place already.
1701                  */
1702                 if (!perf_data__is_pipe(session->data))
1703                         lseek(fd, file_offset, SEEK_SET);
1704                 return tool->tracing_data(session, event);
1705         case PERF_RECORD_HEADER_BUILD_ID:
1706                 return tool->build_id(session, event);
1707         case PERF_RECORD_FINISHED_ROUND:
1708                 return tool->finished_round(tool, event, oe);
1709         case PERF_RECORD_ID_INDEX:
1710                 return tool->id_index(session, event);
1711         case PERF_RECORD_AUXTRACE_INFO:
1712                 return tool->auxtrace_info(session, event);
1713         case PERF_RECORD_AUXTRACE:
1714                 /*
1715                  * Setup for reading amidst mmap, but only when we
1716                  * are in 'file' mode.  The 'pipe' fd is in proper
1717                  * place already.
1718                  */
1719                 if (!perf_data__is_pipe(session->data))
1720                         lseek(fd, file_offset + event->header.size, SEEK_SET);
1721                 return tool->auxtrace(session, event);
1722         case PERF_RECORD_AUXTRACE_ERROR:
1723                 perf_session__auxtrace_error_inc(session, event);
1724                 return tool->auxtrace_error(session, event);
1725         case PERF_RECORD_THREAD_MAP:
1726                 return tool->thread_map(session, event);
1727         case PERF_RECORD_CPU_MAP:
1728                 return tool->cpu_map(session, event);
1729         case PERF_RECORD_STAT_CONFIG:
1730                 return tool->stat_config(session, event);
1731         case PERF_RECORD_STAT:
1732                 return tool->stat(session, event);
1733         case PERF_RECORD_STAT_ROUND:
1734                 return tool->stat_round(session, event);
1735         case PERF_RECORD_TIME_CONV:
1736                 session->time_conv = event->time_conv;
1737                 return tool->time_conv(session, event);
1738         case PERF_RECORD_HEADER_FEATURE:
1739                 return tool->feature(session, event);
1740         case PERF_RECORD_COMPRESSED:
1741                 err = tool->compressed(session, event, file_offset, file_path);
1742                 if (err)
1743                         dump_event(session->evlist, event, file_offset, &sample, file_path);
1744                 return err;
1745         case PERF_RECORD_FINISHED_INIT:
1746                 return tool->finished_init(session, event);
1747         default:
1748                 return -EINVAL;
1749         }
1750 }
1751
1752 int perf_session__deliver_synth_event(struct perf_session *session,
1753                                       union perf_event *event,
1754                                       struct perf_sample *sample)
1755 {
1756         struct evlist *evlist = session->evlist;
1757         struct perf_tool *tool = session->tool;
1758
1759         events_stats__inc(&evlist->stats, event->header.type);
1760
1761         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1762                 return perf_session__process_user_event(session, event, 0, NULL);
1763
1764         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL);
1765 }
1766
1767 static void event_swap(union perf_event *event, bool sample_id_all)
1768 {
1769         perf_event__swap_op swap;
1770
1771         swap = perf_event__swap_ops[event->header.type];
1772         if (swap)
1773                 swap(event, sample_id_all);
1774 }
1775
1776 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1777                              void *buf, size_t buf_sz,
1778                              union perf_event **event_ptr,
1779                              struct perf_sample *sample)
1780 {
1781         union perf_event *event;
1782         size_t hdr_sz, rest;
1783         int fd;
1784
1785         if (session->one_mmap && !session->header.needs_swap) {
1786                 event = file_offset - session->one_mmap_offset +
1787                         session->one_mmap_addr;
1788                 goto out_parse_sample;
1789         }
1790
1791         if (perf_data__is_pipe(session->data))
1792                 return -1;
1793
1794         fd = perf_data__fd(session->data);
1795         hdr_sz = sizeof(struct perf_event_header);
1796
1797         if (buf_sz < hdr_sz)
1798                 return -1;
1799
1800         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1801             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1802                 return -1;
1803
1804         event = (union perf_event *)buf;
1805
1806         if (session->header.needs_swap)
1807                 perf_event_header__bswap(&event->header);
1808
1809         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1810                 return -1;
1811
1812         buf += hdr_sz;
1813         rest = event->header.size - hdr_sz;
1814
1815         if (readn(fd, buf, rest) != (ssize_t)rest)
1816                 return -1;
1817
1818         if (session->header.needs_swap)
1819                 event_swap(event, evlist__sample_id_all(session->evlist));
1820
1821 out_parse_sample:
1822
1823         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1824             evlist__parse_sample(session->evlist, event, sample))
1825                 return -1;
1826
1827         *event_ptr = event;
1828
1829         return 0;
1830 }
1831
1832 int perf_session__peek_events(struct perf_session *session, u64 offset,
1833                               u64 size, peek_events_cb_t cb, void *data)
1834 {
1835         u64 max_offset = offset + size;
1836         char buf[PERF_SAMPLE_MAX_SIZE];
1837         union perf_event *event;
1838         int err;
1839
1840         do {
1841                 err = perf_session__peek_event(session, offset, buf,
1842                                                PERF_SAMPLE_MAX_SIZE, &event,
1843                                                NULL);
1844                 if (err)
1845                         return err;
1846
1847                 err = cb(session, event, offset, data);
1848                 if (err)
1849                         return err;
1850
1851                 offset += event->header.size;
1852                 if (event->header.type == PERF_RECORD_AUXTRACE)
1853                         offset += event->auxtrace.size;
1854
1855         } while (offset < max_offset);
1856
1857         return err;
1858 }
1859
1860 static s64 perf_session__process_event(struct perf_session *session,
1861                                        union perf_event *event, u64 file_offset,
1862                                        const char *file_path)
1863 {
1864         struct evlist *evlist = session->evlist;
1865         struct perf_tool *tool = session->tool;
1866         int ret;
1867
1868         if (session->header.needs_swap)
1869                 event_swap(event, evlist__sample_id_all(evlist));
1870
1871         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1872                 return -EINVAL;
1873
1874         events_stats__inc(&evlist->stats, event->header.type);
1875
1876         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1877                 return perf_session__process_user_event(session, event, file_offset, file_path);
1878
1879         if (tool->ordered_events) {
1880                 u64 timestamp = -1ULL;
1881
1882                 ret = evlist__parse_sample_timestamp(evlist, event, &timestamp);
1883                 if (ret && ret != -1)
1884                         return ret;
1885
1886                 ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path);
1887                 if (ret != -ETIME)
1888                         return ret;
1889         }
1890
1891         return perf_session__deliver_event(session, event, tool, file_offset, file_path);
1892 }
1893
1894 void perf_event_header__bswap(struct perf_event_header *hdr)
1895 {
1896         hdr->type = bswap_32(hdr->type);
1897         hdr->misc = bswap_16(hdr->misc);
1898         hdr->size = bswap_16(hdr->size);
1899 }
1900
1901 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1902 {
1903         return machine__findnew_thread(&session->machines.host, -1, pid);
1904 }
1905
1906 int perf_session__register_idle_thread(struct perf_session *session)
1907 {
1908         struct thread *thread = machine__idle_thread(&session->machines.host);
1909
1910         /* machine__idle_thread() got the thread, so put it */
1911         thread__put(thread);
1912         return thread ? 0 : -1;
1913 }
1914
1915 static void
1916 perf_session__warn_order(const struct perf_session *session)
1917 {
1918         const struct ordered_events *oe = &session->ordered_events;
1919         struct evsel *evsel;
1920         bool should_warn = true;
1921
1922         evlist__for_each_entry(session->evlist, evsel) {
1923                 if (evsel->core.attr.write_backward)
1924                         should_warn = false;
1925         }
1926
1927         if (!should_warn)
1928                 return;
1929         if (oe->nr_unordered_events != 0)
1930                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1931 }
1932
1933 static void perf_session__warn_about_errors(const struct perf_session *session)
1934 {
1935         const struct events_stats *stats = &session->evlist->stats;
1936
1937         if (session->tool->lost == perf_event__process_lost &&
1938             stats->nr_events[PERF_RECORD_LOST] != 0) {
1939                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1940                             "Check IO/CPU overload!\n\n",
1941                             stats->nr_events[0],
1942                             stats->nr_events[PERF_RECORD_LOST]);
1943         }
1944
1945         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1946                 double drop_rate;
1947
1948                 drop_rate = (double)stats->total_lost_samples /
1949                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1950                 if (drop_rate > 0.05) {
1951                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
1952                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1953                                     drop_rate * 100.0);
1954                 }
1955         }
1956
1957         if (session->tool->aux == perf_event__process_aux &&
1958             stats->total_aux_lost != 0) {
1959                 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1960                             stats->total_aux_lost,
1961                             stats->nr_events[PERF_RECORD_AUX]);
1962         }
1963
1964         if (session->tool->aux == perf_event__process_aux &&
1965             stats->total_aux_partial != 0) {
1966                 bool vmm_exclusive = false;
1967
1968                 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1969                                        &vmm_exclusive);
1970
1971                 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1972                             "Are you running a KVM guest in the background?%s\n\n",
1973                             stats->total_aux_partial,
1974                             stats->nr_events[PERF_RECORD_AUX],
1975                             vmm_exclusive ?
1976                             "\nReloading kvm_intel module with vmm_exclusive=0\n"
1977                             "will reduce the gaps to only guest's timeslices." :
1978                             "");
1979         }
1980
1981         if (session->tool->aux == perf_event__process_aux &&
1982             stats->total_aux_collision != 0) {
1983                 ui__warning("AUX data detected collision  %" PRIu64 " times out of %u!\n\n",
1984                             stats->total_aux_collision,
1985                             stats->nr_events[PERF_RECORD_AUX]);
1986         }
1987
1988         if (stats->nr_unknown_events != 0) {
1989                 ui__warning("Found %u unknown events!\n\n"
1990                             "Is this an older tool processing a perf.data "
1991                             "file generated by a more recent tool?\n\n"
1992                             "If that is not the case, consider "
1993                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1994                             stats->nr_unknown_events);
1995         }
1996
1997         if (stats->nr_unknown_id != 0) {
1998                 ui__warning("%u samples with id not present in the header\n",
1999                             stats->nr_unknown_id);
2000         }
2001
2002         if (stats->nr_invalid_chains != 0) {
2003                 ui__warning("Found invalid callchains!\n\n"
2004                             "%u out of %u events were discarded for this reason.\n\n"
2005                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
2006                             stats->nr_invalid_chains,
2007                             stats->nr_events[PERF_RECORD_SAMPLE]);
2008         }
2009
2010         if (stats->nr_unprocessable_samples != 0) {
2011                 ui__warning("%u unprocessable samples recorded.\n"
2012                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
2013                             stats->nr_unprocessable_samples);
2014         }
2015
2016         perf_session__warn_order(session);
2017
2018         events_stats__auxtrace_error_warn(stats);
2019
2020         if (stats->nr_proc_map_timeout != 0) {
2021                 ui__warning("%d map information files for pre-existing threads were\n"
2022                             "not processed, if there are samples for addresses they\n"
2023                             "will not be resolved, you may find out which are these\n"
2024                             "threads by running with -v and redirecting the output\n"
2025                             "to a file.\n"
2026                             "The time limit to process proc map is too short?\n"
2027                             "Increase it by --proc-map-timeout\n",
2028                             stats->nr_proc_map_timeout);
2029         }
2030 }
2031
2032 static int perf_session__flush_thread_stack(struct thread *thread,
2033                                             void *p __maybe_unused)
2034 {
2035         return thread_stack__flush(thread);
2036 }
2037
2038 static int perf_session__flush_thread_stacks(struct perf_session *session)
2039 {
2040         return machines__for_each_thread(&session->machines,
2041                                          perf_session__flush_thread_stack,
2042                                          NULL);
2043 }
2044
2045 volatile sig_atomic_t session_done;
2046
2047 static int __perf_session__process_decomp_events(struct perf_session *session);
2048
2049 static int __perf_session__process_pipe_events(struct perf_session *session)
2050 {
2051         struct ordered_events *oe = &session->ordered_events;
2052         struct perf_tool *tool = session->tool;
2053         union perf_event *event;
2054         uint32_t size, cur_size = 0;
2055         void *buf = NULL;
2056         s64 skip = 0;
2057         u64 head;
2058         ssize_t err;
2059         void *p;
2060
2061         perf_tool__fill_defaults(tool);
2062
2063         head = 0;
2064         cur_size = sizeof(union perf_event);
2065
2066         buf = malloc(cur_size);
2067         if (!buf)
2068                 return -errno;
2069         ordered_events__set_copy_on_queue(oe, true);
2070 more:
2071         event = buf;
2072         err = perf_data__read(session->data, event,
2073                               sizeof(struct perf_event_header));
2074         if (err <= 0) {
2075                 if (err == 0)
2076                         goto done;
2077
2078                 pr_err("failed to read event header\n");
2079                 goto out_err;
2080         }
2081
2082         if (session->header.needs_swap)
2083                 perf_event_header__bswap(&event->header);
2084
2085         size = event->header.size;
2086         if (size < sizeof(struct perf_event_header)) {
2087                 pr_err("bad event header size\n");
2088                 goto out_err;
2089         }
2090
2091         if (size > cur_size) {
2092                 void *new = realloc(buf, size);
2093                 if (!new) {
2094                         pr_err("failed to allocate memory to read event\n");
2095                         goto out_err;
2096                 }
2097                 buf = new;
2098                 cur_size = size;
2099                 event = buf;
2100         }
2101         p = event;
2102         p += sizeof(struct perf_event_header);
2103
2104         if (size - sizeof(struct perf_event_header)) {
2105                 err = perf_data__read(session->data, p,
2106                                       size - sizeof(struct perf_event_header));
2107                 if (err <= 0) {
2108                         if (err == 0) {
2109                                 pr_err("unexpected end of event stream\n");
2110                                 goto done;
2111                         }
2112
2113                         pr_err("failed to read event data\n");
2114                         goto out_err;
2115                 }
2116         }
2117
2118         if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) {
2119                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2120                        head, event->header.size, event->header.type);
2121                 err = -EINVAL;
2122                 goto out_err;
2123         }
2124
2125         head += size;
2126
2127         if (skip > 0)
2128                 head += skip;
2129
2130         err = __perf_session__process_decomp_events(session);
2131         if (err)
2132                 goto out_err;
2133
2134         if (!session_done())
2135                 goto more;
2136 done:
2137         /* do the final flush for ordered samples */
2138         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2139         if (err)
2140                 goto out_err;
2141         err = auxtrace__flush_events(session, tool);
2142         if (err)
2143                 goto out_err;
2144         err = perf_session__flush_thread_stacks(session);
2145 out_err:
2146         free(buf);
2147         if (!tool->no_warn)
2148                 perf_session__warn_about_errors(session);
2149         ordered_events__free(&session->ordered_events);
2150         auxtrace__free_events(session);
2151         return err;
2152 }
2153
2154 static union perf_event *
2155 prefetch_event(char *buf, u64 head, size_t mmap_size,
2156                bool needs_swap, union perf_event *error)
2157 {
2158         union perf_event *event;
2159         u16 event_size;
2160
2161         /*
2162          * Ensure we have enough space remaining to read
2163          * the size of the event in the headers.
2164          */
2165         if (head + sizeof(event->header) > mmap_size)
2166                 return NULL;
2167
2168         event = (union perf_event *)(buf + head);
2169         if (needs_swap)
2170                 perf_event_header__bswap(&event->header);
2171
2172         event_size = event->header.size;
2173         if (head + event_size <= mmap_size)
2174                 return event;
2175
2176         /* We're not fetching the event so swap back again */
2177         if (needs_swap)
2178                 perf_event_header__bswap(&event->header);
2179
2180         /* Check if the event fits into the next mmapped buf. */
2181         if (event_size <= mmap_size - head % page_size) {
2182                 /* Remap buf and fetch again. */
2183                 return NULL;
2184         }
2185
2186         /* Invalid input. Event size should never exceed mmap_size. */
2187         pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:"
2188                  " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size);
2189
2190         return error;
2191 }
2192
2193 static union perf_event *
2194 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2195 {
2196         return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL));
2197 }
2198
2199 static union perf_event *
2200 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap)
2201 {
2202         return prefetch_event(buf, head, mmap_size, needs_swap, NULL);
2203 }
2204
2205 static int __perf_session__process_decomp_events(struct perf_session *session)
2206 {
2207         s64 skip;
2208         u64 size;
2209         struct decomp *decomp = session->active_decomp->decomp_last;
2210
2211         if (!decomp)
2212                 return 0;
2213
2214         while (decomp->head < decomp->size && !session_done()) {
2215                 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data,
2216                                                              session->header.needs_swap);
2217
2218                 if (!event)
2219                         break;
2220
2221                 size = event->header.size;
2222
2223                 if (size < sizeof(struct perf_event_header) ||
2224                     (skip = perf_session__process_event(session, event, decomp->file_pos,
2225                                                         decomp->file_path)) < 0) {
2226                         pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
2227                                 decomp->file_pos + decomp->head, event->header.size, event->header.type);
2228                         return -EINVAL;
2229                 }
2230
2231                 if (skip)
2232                         size += skip;
2233
2234                 decomp->head += size;
2235         }
2236
2237         return 0;
2238 }
2239
2240 /*
2241  * On 64bit we can mmap the data file in one go. No need for tiny mmap
2242  * slices. On 32bit we use 32MB.
2243  */
2244 #if BITS_PER_LONG == 64
2245 #define MMAP_SIZE ULLONG_MAX
2246 #define NUM_MMAPS 1
2247 #else
2248 #define MMAP_SIZE (32 * 1024 * 1024ULL)
2249 #define NUM_MMAPS 128
2250 #endif
2251
2252 struct reader;
2253
2254 typedef s64 (*reader_cb_t)(struct perf_session *session,
2255                            union perf_event *event,
2256                            u64 file_offset,
2257                            const char *file_path);
2258
2259 struct reader {
2260         int              fd;
2261         const char       *path;
2262         u64              data_size;
2263         u64              data_offset;
2264         reader_cb_t      process;
2265         bool             in_place_update;
2266         char             *mmaps[NUM_MMAPS];
2267         size_t           mmap_size;
2268         int              mmap_idx;
2269         char             *mmap_cur;
2270         u64              file_pos;
2271         u64              file_offset;
2272         u64              head;
2273         u64              size;
2274         bool             done;
2275         struct zstd_data   zstd_data;
2276         struct decomp_data decomp_data;
2277 };
2278
2279 static int
2280 reader__init(struct reader *rd, bool *one_mmap)
2281 {
2282         u64 data_size = rd->data_size;
2283         char **mmaps = rd->mmaps;
2284
2285         rd->head = rd->data_offset;
2286         data_size += rd->data_offset;
2287
2288         rd->mmap_size = MMAP_SIZE;
2289         if (rd->mmap_size > data_size) {
2290                 rd->mmap_size = data_size;
2291                 if (one_mmap)
2292                         *one_mmap = true;
2293         }
2294
2295         memset(mmaps, 0, sizeof(rd->mmaps));
2296
2297         if (zstd_init(&rd->zstd_data, 0))
2298                 return -1;
2299         rd->decomp_data.zstd_decomp = &rd->zstd_data;
2300
2301         return 0;
2302 }
2303
2304 static void
2305 reader__release_decomp(struct reader *rd)
2306 {
2307         perf_decomp__release_events(rd->decomp_data.decomp);
2308         zstd_fini(&rd->zstd_data);
2309 }
2310
2311 static int
2312 reader__mmap(struct reader *rd, struct perf_session *session)
2313 {
2314         int mmap_prot, mmap_flags;
2315         char *buf, **mmaps = rd->mmaps;
2316         u64 page_offset;
2317
2318         mmap_prot  = PROT_READ;
2319         mmap_flags = MAP_SHARED;
2320
2321         if (rd->in_place_update) {
2322                 mmap_prot  |= PROT_WRITE;
2323         } else if (session->header.needs_swap) {
2324                 mmap_prot  |= PROT_WRITE;
2325                 mmap_flags = MAP_PRIVATE;
2326         }
2327
2328         if (mmaps[rd->mmap_idx]) {
2329                 munmap(mmaps[rd->mmap_idx], rd->mmap_size);
2330                 mmaps[rd->mmap_idx] = NULL;
2331         }
2332
2333         page_offset = page_size * (rd->head / page_size);
2334         rd->file_offset += page_offset;
2335         rd->head -= page_offset;
2336
2337         buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd,
2338                    rd->file_offset);
2339         if (buf == MAP_FAILED) {
2340                 pr_err("failed to mmap file\n");
2341                 return -errno;
2342         }
2343         mmaps[rd->mmap_idx] = rd->mmap_cur = buf;
2344         rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1);
2345         rd->file_pos = rd->file_offset + rd->head;
2346         if (session->one_mmap) {
2347                 session->one_mmap_addr = buf;
2348                 session->one_mmap_offset = rd->file_offset;
2349         }
2350
2351         return 0;
2352 }
2353
2354 enum {
2355         READER_OK,
2356         READER_NODATA,
2357 };
2358
2359 static int
2360 reader__read_event(struct reader *rd, struct perf_session *session,
2361                    struct ui_progress *prog)
2362 {
2363         u64 size;
2364         int err = READER_OK;
2365         union perf_event *event;
2366         s64 skip;
2367
2368         event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur,
2369                                    session->header.needs_swap);
2370         if (IS_ERR(event))
2371                 return PTR_ERR(event);
2372
2373         if (!event)
2374                 return READER_NODATA;
2375
2376         size = event->header.size;
2377
2378         skip = -EINVAL;
2379
2380         if (size < sizeof(struct perf_event_header) ||
2381             (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) {
2382                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
2383                        rd->file_offset + rd->head, event->header.size,
2384                        event->header.type, strerror(-skip));
2385                 err = skip;
2386                 goto out;
2387         }
2388
2389         if (skip)
2390                 size += skip;
2391
2392         rd->size += size;
2393         rd->head += size;
2394         rd->file_pos += size;
2395
2396         err = __perf_session__process_decomp_events(session);
2397         if (err)
2398                 goto out;
2399
2400         ui_progress__update(prog, size);
2401
2402 out:
2403         return err;
2404 }
2405
2406 static inline bool
2407 reader__eof(struct reader *rd)
2408 {
2409         return (rd->file_pos >= rd->data_size + rd->data_offset);
2410 }
2411
2412 static int
2413 reader__process_events(struct reader *rd, struct perf_session *session,
2414                        struct ui_progress *prog)
2415 {
2416         int err;
2417
2418         err = reader__init(rd, &session->one_mmap);
2419         if (err)
2420                 goto out;
2421
2422         session->active_decomp = &rd->decomp_data;
2423
2424 remap:
2425         err = reader__mmap(rd, session);
2426         if (err)
2427                 goto out;
2428
2429 more:
2430         err = reader__read_event(rd, session, prog);
2431         if (err < 0)
2432                 goto out;
2433         else if (err == READER_NODATA)
2434                 goto remap;
2435
2436         if (session_done())
2437                 goto out;
2438
2439         if (!reader__eof(rd))
2440                 goto more;
2441
2442 out:
2443         session->active_decomp = &session->decomp_data;
2444         return err;
2445 }
2446
2447 static s64 process_simple(struct perf_session *session,
2448                           union perf_event *event,
2449                           u64 file_offset,
2450                           const char *file_path)
2451 {
2452         return perf_session__process_event(session, event, file_offset, file_path);
2453 }
2454
2455 static int __perf_session__process_events(struct perf_session *session)
2456 {
2457         struct reader rd = {
2458                 .fd             = perf_data__fd(session->data),
2459                 .path           = session->data->file.path,
2460                 .data_size      = session->header.data_size,
2461                 .data_offset    = session->header.data_offset,
2462                 .process        = process_simple,
2463                 .in_place_update = session->data->in_place_update,
2464         };
2465         struct ordered_events *oe = &session->ordered_events;
2466         struct perf_tool *tool = session->tool;
2467         struct ui_progress prog;
2468         int err;
2469
2470         perf_tool__fill_defaults(tool);
2471
2472         if (rd.data_size == 0)
2473                 return -1;
2474
2475         ui_progress__init_size(&prog, rd.data_size, "Processing events...");
2476
2477         err = reader__process_events(&rd, session, &prog);
2478         if (err)
2479                 goto out_err;
2480         /* do the final flush for ordered samples */
2481         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
2482         if (err)
2483                 goto out_err;
2484         err = auxtrace__flush_events(session, tool);
2485         if (err)
2486                 goto out_err;
2487         err = perf_session__flush_thread_stacks(session);
2488 out_err:
2489         ui_progress__finish();
2490         if (!tool->no_warn)
2491                 perf_session__warn_about_errors(session);
2492         /*
2493          * We may switching perf.data output, make ordered_events
2494          * reusable.
2495          */
2496         ordered_events__reinit(&session->ordered_events);
2497         auxtrace__free_events(session);
2498         reader__release_decomp(&rd);
2499         session->one_mmap = false;
2500         return err;
2501 }
2502
2503 /*
2504  * Processing 2 MB of data from each reader in sequence,
2505  * because that's the way the ordered events sorting works
2506  * most efficiently.
2507  */
2508 #define READER_MAX_SIZE (2 * 1024 * 1024)
2509
2510 /*
2511  * This function reads, merge and process directory data.
2512  * It assumens the version 1 of directory data, where each
2513  * data file holds per-cpu data, already sorted by kernel.
2514  */
2515 static int __perf_session__process_dir_events(struct perf_session *session)
2516 {
2517         struct perf_data *data = session->data;
2518         struct perf_tool *tool = session->tool;
2519         int i, ret, readers, nr_readers;
2520         struct ui_progress prog;
2521         u64 total_size = perf_data__size(session->data);
2522         struct reader *rd;
2523
2524         perf_tool__fill_defaults(tool);
2525
2526         ui_progress__init_size(&prog, total_size, "Sorting events...");
2527
2528         nr_readers = 1;
2529         for (i = 0; i < data->dir.nr; i++) {
2530                 if (data->dir.files[i].size)
2531                         nr_readers++;
2532         }
2533
2534         rd = zalloc(nr_readers * sizeof(struct reader));
2535         if (!rd)
2536                 return -ENOMEM;
2537
2538         rd[0] = (struct reader) {
2539                 .fd              = perf_data__fd(session->data),
2540                 .path            = session->data->file.path,
2541                 .data_size       = session->header.data_size,
2542                 .data_offset     = session->header.data_offset,
2543                 .process         = process_simple,
2544                 .in_place_update = session->data->in_place_update,
2545         };
2546         ret = reader__init(&rd[0], NULL);
2547         if (ret)
2548                 goto out_err;
2549         ret = reader__mmap(&rd[0], session);
2550         if (ret)
2551                 goto out_err;
2552         readers = 1;
2553
2554         for (i = 0; i < data->dir.nr; i++) {
2555                 if (!data->dir.files[i].size)
2556                         continue;
2557                 rd[readers] = (struct reader) {
2558                         .fd              = data->dir.files[i].fd,
2559                         .path            = data->dir.files[i].path,
2560                         .data_size       = data->dir.files[i].size,
2561                         .data_offset     = 0,
2562                         .process         = process_simple,
2563                         .in_place_update = session->data->in_place_update,
2564                 };
2565                 ret = reader__init(&rd[readers], NULL);
2566                 if (ret)
2567                         goto out_err;
2568                 ret = reader__mmap(&rd[readers], session);
2569                 if (ret)
2570                         goto out_err;
2571                 readers++;
2572         }
2573
2574         i = 0;
2575         while (readers) {
2576                 if (session_done())
2577                         break;
2578
2579                 if (rd[i].done) {
2580                         i = (i + 1) % nr_readers;
2581                         continue;
2582                 }
2583                 if (reader__eof(&rd[i])) {
2584                         rd[i].done = true;
2585                         readers--;
2586                         continue;
2587                 }
2588
2589                 session->active_decomp = &rd[i].decomp_data;
2590                 ret = reader__read_event(&rd[i], session, &prog);
2591                 if (ret < 0) {
2592                         goto out_err;
2593                 } else if (ret == READER_NODATA) {
2594                         ret = reader__mmap(&rd[i], session);
2595                         if (ret)
2596                                 goto out_err;
2597                 }
2598
2599                 if (rd[i].size >= READER_MAX_SIZE) {
2600                         rd[i].size = 0;
2601                         i = (i + 1) % nr_readers;
2602                 }
2603         }
2604
2605         ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL);
2606         if (ret)
2607                 goto out_err;
2608
2609         ret = perf_session__flush_thread_stacks(session);
2610 out_err:
2611         ui_progress__finish();
2612
2613         if (!tool->no_warn)
2614                 perf_session__warn_about_errors(session);
2615
2616         /*
2617          * We may switching perf.data output, make ordered_events
2618          * reusable.
2619          */
2620         ordered_events__reinit(&session->ordered_events);
2621
2622         session->one_mmap = false;
2623
2624         session->active_decomp = &session->decomp_data;
2625         for (i = 0; i < nr_readers; i++)
2626                 reader__release_decomp(&rd[i]);
2627         zfree(&rd);
2628
2629         return ret;
2630 }
2631
2632 int perf_session__process_events(struct perf_session *session)
2633 {
2634         if (perf_session__register_idle_thread(session) < 0)
2635                 return -ENOMEM;
2636
2637         if (perf_data__is_pipe(session->data))
2638                 return __perf_session__process_pipe_events(session);
2639
2640         if (perf_data__is_dir(session->data) && session->data->dir.nr)
2641                 return __perf_session__process_dir_events(session);
2642
2643         return __perf_session__process_events(session);
2644 }
2645
2646 bool perf_session__has_traces(struct perf_session *session, const char *msg)
2647 {
2648         struct evsel *evsel;
2649
2650         evlist__for_each_entry(session->evlist, evsel) {
2651                 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
2652                         return true;
2653         }
2654
2655         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
2656         return false;
2657 }
2658
2659 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
2660 {
2661         char *bracket;
2662         struct ref_reloc_sym *ref;
2663         struct kmap *kmap;
2664
2665         ref = zalloc(sizeof(struct ref_reloc_sym));
2666         if (ref == NULL)
2667                 return -ENOMEM;
2668
2669         ref->name = strdup(symbol_name);
2670         if (ref->name == NULL) {
2671                 free(ref);
2672                 return -ENOMEM;
2673         }
2674
2675         bracket = strchr(ref->name, ']');
2676         if (bracket)
2677                 *bracket = '\0';
2678
2679         ref->addr = addr;
2680
2681         kmap = map__kmap(map);
2682         if (kmap)
2683                 kmap->ref_reloc_sym = ref;
2684
2685         return 0;
2686 }
2687
2688 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
2689 {
2690         return machines__fprintf_dsos(&session->machines, fp);
2691 }
2692
2693 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
2694                                           bool (skip)(struct dso *dso, int parm), int parm)
2695 {
2696         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
2697 }
2698
2699 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp,
2700                                        bool skip_empty)
2701 {
2702         size_t ret;
2703         const char *msg = "";
2704
2705         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
2706                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
2707
2708         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
2709
2710         ret += events_stats__fprintf(&session->evlist->stats, fp, skip_empty);
2711         return ret;
2712 }
2713
2714 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2715 {
2716         /*
2717          * FIXME: Here we have to actually print all the machines in this
2718          * session, not just the host...
2719          */
2720         return machine__fprintf(&session->machines.host, fp);
2721 }
2722
2723 void perf_session__dump_kmaps(struct perf_session *session)
2724 {
2725         int save_verbose = verbose;
2726
2727         fflush(stdout);
2728         fprintf(stderr, "Kernel and module maps:\n");
2729         verbose = 0; /* Suppress verbose to print a summary only */
2730         maps__fprintf(machine__kernel_maps(&session->machines.host), stderr);
2731         verbose = save_verbose;
2732 }
2733
2734 struct evsel *perf_session__find_first_evtype(struct perf_session *session,
2735                                               unsigned int type)
2736 {
2737         struct evsel *pos;
2738
2739         evlist__for_each_entry(session->evlist, pos) {
2740                 if (pos->core.attr.type == type)
2741                         return pos;
2742         }
2743         return NULL;
2744 }
2745
2746 int perf_session__cpu_bitmap(struct perf_session *session,
2747                              const char *cpu_list, unsigned long *cpu_bitmap)
2748 {
2749         int i, err = -1;
2750         struct perf_cpu_map *map;
2751         int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS);
2752
2753         for (i = 0; i < PERF_TYPE_MAX; ++i) {
2754                 struct evsel *evsel;
2755
2756                 evsel = perf_session__find_first_evtype(session, i);
2757                 if (!evsel)
2758                         continue;
2759
2760                 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
2761                         pr_err("File does not contain CPU events. "
2762                                "Remove -C option to proceed.\n");
2763                         return -1;
2764                 }
2765         }
2766
2767         map = perf_cpu_map__new(cpu_list);
2768         if (map == NULL) {
2769                 pr_err("Invalid cpu_list\n");
2770                 return -1;
2771         }
2772
2773         for (i = 0; i < perf_cpu_map__nr(map); i++) {
2774                 struct perf_cpu cpu = perf_cpu_map__cpu(map, i);
2775
2776                 if (cpu.cpu >= nr_cpus) {
2777                         pr_err("Requested CPU %d too large. "
2778                                "Consider raising MAX_NR_CPUS\n", cpu.cpu);
2779                         goto out_delete_map;
2780                 }
2781
2782                 __set_bit(cpu.cpu, cpu_bitmap);
2783         }
2784
2785         err = 0;
2786
2787 out_delete_map:
2788         perf_cpu_map__put(map);
2789         return err;
2790 }
2791
2792 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2793                                 bool full)
2794 {
2795         if (session == NULL || fp == NULL)
2796                 return;
2797
2798         fprintf(fp, "# ========\n");
2799         perf_header__fprintf_info(session, fp, full);
2800         fprintf(fp, "# ========\n#\n");
2801 }
2802
2803 static int perf_session__register_guest(struct perf_session *session, pid_t machine_pid)
2804 {
2805         struct machine *machine = machines__findnew(&session->machines, machine_pid);
2806         struct thread *thread;
2807
2808         if (!machine)
2809                 return -ENOMEM;
2810
2811         machine->single_address_space = session->machines.host.single_address_space;
2812
2813         thread = machine__idle_thread(machine);
2814         if (!thread)
2815                 return -ENOMEM;
2816         thread__put(thread);
2817
2818         machine->kallsyms_filename = perf_data__guest_kallsyms_name(session->data, machine_pid);
2819
2820         return 0;
2821 }
2822
2823 static int perf_session__set_guest_cpu(struct perf_session *session, pid_t pid,
2824                                        pid_t tid, int guest_cpu)
2825 {
2826         struct machine *machine = &session->machines.host;
2827         struct thread *thread = machine__findnew_thread(machine, pid, tid);
2828
2829         if (!thread)
2830                 return -ENOMEM;
2831         thread__set_guest_cpu(thread, guest_cpu);
2832         thread__put(thread);
2833
2834         return 0;
2835 }
2836
2837 int perf_event__process_id_index(struct perf_session *session,
2838                                  union perf_event *event)
2839 {
2840         struct evlist *evlist = session->evlist;
2841         struct perf_record_id_index *ie = &event->id_index;
2842         size_t sz = ie->header.size - sizeof(*ie);
2843         size_t i, nr, max_nr;
2844         size_t e1_sz = sizeof(struct id_index_entry);
2845         size_t e2_sz = sizeof(struct id_index_entry_2);
2846         size_t etot_sz = e1_sz + e2_sz;
2847         struct id_index_entry_2 *e2;
2848         pid_t last_pid = 0;
2849
2850         max_nr = sz / e1_sz;
2851         nr = ie->nr;
2852         if (nr > max_nr) {
2853                 printf("Too big: nr %zu max_nr %zu\n", nr, max_nr);
2854                 return -EINVAL;
2855         }
2856
2857         if (sz >= nr * etot_sz) {
2858                 max_nr = sz / etot_sz;
2859                 if (nr > max_nr) {
2860                         printf("Too big2: nr %zu max_nr %zu\n", nr, max_nr);
2861                         return -EINVAL;
2862                 }
2863                 e2 = (void *)ie + sizeof(*ie) + nr * e1_sz;
2864         } else {
2865                 e2 = NULL;
2866         }
2867
2868         if (dump_trace)
2869                 fprintf(stdout, " nr: %zu\n", nr);
2870
2871         for (i = 0; i < nr; i++, (e2 ? e2++ : 0)) {
2872                 struct id_index_entry *e = &ie->entries[i];
2873                 struct perf_sample_id *sid;
2874                 int ret;
2875
2876                 if (dump_trace) {
2877                         fprintf(stdout, " ... id: %"PRI_lu64, e->id);
2878                         fprintf(stdout, "  idx: %"PRI_lu64, e->idx);
2879                         fprintf(stdout, "  cpu: %"PRI_ld64, e->cpu);
2880                         fprintf(stdout, "  tid: %"PRI_ld64, e->tid);
2881                         if (e2) {
2882                                 fprintf(stdout, "  machine_pid: %"PRI_ld64, e2->machine_pid);
2883                                 fprintf(stdout, "  vcpu: %"PRI_lu64"\n", e2->vcpu);
2884                         } else {
2885                                 fprintf(stdout, "\n");
2886                         }
2887                 }
2888
2889                 sid = evlist__id2sid(evlist, e->id);
2890                 if (!sid)
2891                         return -ENOENT;
2892
2893                 sid->idx = e->idx;
2894                 sid->cpu.cpu = e->cpu;
2895                 sid->tid = e->tid;
2896
2897                 if (!e2)
2898                         continue;
2899
2900                 sid->machine_pid = e2->machine_pid;
2901                 sid->vcpu.cpu = e2->vcpu;
2902
2903                 if (!sid->machine_pid)
2904                         continue;
2905
2906                 if (sid->machine_pid != last_pid) {
2907                         ret = perf_session__register_guest(session, sid->machine_pid);
2908                         if (ret)
2909                                 return ret;
2910                         last_pid = sid->machine_pid;
2911                         perf_guest = true;
2912                 }
2913
2914                 ret = perf_session__set_guest_cpu(session, sid->machine_pid, e->tid, e2->vcpu);
2915                 if (ret)
2916                         return ret;
2917         }
2918         return 0;
2919 }