tools/perf/util/session.c

   1 #include <errno.h>
   2 #include <inttypes.h>
   3 #include <linux/kernel.h>
   4 #include <traceevent/event-parse.h>
   5 #include <api/fs/fs.h>
   6
   7 #include <byteswap.h>
   8 #include <unistd.h>
   9 #include <sys/types.h>
  10 #include <sys/mman.h>
  11
  12 #include "evlist.h"
  13 #include "evsel.h"
  14 #include "session.h"
  15 #include "tool.h"
  16 #include "sort.h"
  17 #include "util.h"
  18 #include "cpumap.h"
  19 #include "perf_regs.h"
  20 #include "asm/bug.h"
  21 #include "auxtrace.h"
  22 #include "thread.h"
  23 #include "thread-stack.h"
  24 #include "stat.h"
  25
  26 static int perf_session__deliver_event(struct perf_session *session,
  27                                        union perf_event *event,
  28                                        struct perf_sample *sample,
  29                                        struct perf_tool *tool,
  30                                        u64 file_offset);
  31
  32 static int perf_session__open(struct perf_session *session)
  33 {
  34         struct perf_data_file *file = session->file;
  35
  36         if (perf_session__read_header(session) < 0) {
  37                 pr_err("incompatible file format (rerun with -v to learn more)\n");
  38                 return -1;
  39         }
  40
  41         if (perf_data_file__is_pipe(file))
  42                 return 0;
  43
  44         if (perf_header__has_feat(&session->header, HEADER_STAT))
  45                 return 0;
  46
  47         if (!perf_evlist__valid_sample_type(session->evlist)) {
  48                 pr_err("non matching sample_type\n");
  49                 return -1;
  50         }
  51
  52         if (!perf_evlist__valid_sample_id_all(session->evlist)) {
  53                 pr_err("non matching sample_id_all\n");
  54                 return -1;
  55         }
  56
  57         if (!perf_evlist__valid_read_format(session->evlist)) {
  58                 pr_err("non matching read_format\n");
  59                 return -1;
  60         }
  61
  62         return 0;
  63 }
  64
  65 void perf_session__set_id_hdr_size(struct perf_session *session)
  66 {
  67         u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
  68
  69         machines__set_id_hdr_size(&session->machines, id_hdr_size);
  70 }
  71
  72 int perf_session__create_kernel_maps(struct perf_session *session)
  73 {
  74         int ret = machine__create_kernel_maps(&session->machines.host);
  75
  76         if (ret >= 0)
  77                 ret = machines__create_guest_kernel_maps(&session->machines);
  78         return ret;
  79 }
  80
  81 static void perf_session__destroy_kernel_maps(struct perf_session *session)
  82 {
  83         machines__destroy_kernel_maps(&session->machines);
  84 }
  85
  86 static bool perf_session__has_comm_exec(struct perf_session *session)
  87 {
  88         struct perf_evsel *evsel;
  89
  90         evlist__for_each_entry(session->evlist, evsel) {
  91                 if (evsel->attr.comm_exec)
  92                         return true;
  93         }
  94
  95         return false;
  96 }
  97
  98 static void perf_session__set_comm_exec(struct perf_session *session)
  99 {
 100         bool comm_exec = perf_session__has_comm_exec(session);
 101
 102         machines__set_comm_exec(&session->machines, comm_exec);
 103 }
 104
 105 static int ordered_events__deliver_event(struct ordered_events *oe,
 106                                          struct ordered_event *event)
 107 {
 108         struct perf_sample sample;
 109         struct perf_session *session = container_of(oe, struct perf_session,
 110                                                     ordered_events);
 111         int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample);
 112
 113         if (ret) {
 114                 pr_err("Can't parse sample, err = %d\n", ret);
 115                 return ret;
 116         }
 117
 118         return perf_session__deliver_event(session, event->event, &sample,
 119                                            session->tool, event->file_offset);
 120 }
 121
 122 struct perf_session *perf_session__new(struct perf_data_file *file,
 123                                        bool repipe, struct perf_tool *tool)
 124 {
 125         struct perf_session *session = zalloc(sizeof(*session));
 126
 127         if (!session)
 128                 goto out;
 129
 130         session->repipe = repipe;
 131         session->tool   = tool;
 132         INIT_LIST_HEAD(&session->auxtrace_index);
 133         machines__init(&session->machines);
 134         ordered_events__init(&session->ordered_events, ordered_events__deliver_event);
 135
 136         if (file) {
 137                 if (perf_data_file__open(file))
 138                         goto out_delete;
 139
 140                 session->file = file;
 141
 142                 if (perf_data_file__is_read(file)) {
 143                         if (perf_session__open(session) < 0)
 144                                 goto out_close;
 145
 146                         /*
 147                          * set session attributes that are present in perf.data
 148                          * but not in pipe-mode.
 149                          */
 150                         if (!file->is_pipe) {
 151                                 perf_session__set_id_hdr_size(session);
 152                                 perf_session__set_comm_exec(session);
 153                         }
 154                 }
 155         } else  {
 156                 session->machines.host.env = &perf_env;
 157         }
 158
 159         if (!file || perf_data_file__is_write(file)) {
 160                 /*
 161                  * In O_RDONLY mode this will be performed when reading the
 162                  * kernel MMAP event, in perf_event__process_mmap().
 163                  */
 164                 if (perf_session__create_kernel_maps(session) < 0)
 165                         pr_warning("Cannot read kernel map\n");
 166         }
 167
 168         /*
 169          * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
 170          * processed, so perf_evlist__sample_id_all is not meaningful here.
 171          */
 172         if ((!file || !file->is_pipe) && tool && tool->ordering_requires_timestamps &&
 173             tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
 174                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 175                 tool->ordered_events = false;
 176         }
 177
 178         return session;
 179
 180  out_close:
 181         perf_data_file__close(file);
 182  out_delete:
 183         perf_session__delete(session);
 184  out:
 185         return NULL;
 186 }
 187
 188 static void perf_session__delete_threads(struct perf_session *session)
 189 {
 190         machine__delete_threads(&session->machines.host);
 191 }
 192
 193 void perf_session__delete(struct perf_session *session)
 194 {
 195         if (session == NULL)
 196                 return;
 197         auxtrace__free(session);
 198         auxtrace_index__free(&session->auxtrace_index);
 199         perf_session__destroy_kernel_maps(session);
 200         perf_session__delete_threads(session);
 201         perf_env__exit(&session->header.env);
 202         machines__exit(&session->machines);
 203         if (session->file)
 204                 perf_data_file__close(session->file);
 205         free(session);
 206 }
 207
 208 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
 209                                                  __maybe_unused,
 210                                                  union perf_event *event
 211                                                  __maybe_unused,
 212                                                  struct perf_session *session
 213                                                 __maybe_unused)
 214 {
 215         dump_printf(": unhandled!\n");
 216         return 0;
 217 }
 218
 219 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
 220                                          union perf_event *event __maybe_unused,
 221                                          struct perf_evlist **pevlist
 222                                          __maybe_unused)
 223 {
 224         dump_printf(": unhandled!\n");
 225         return 0;
 226 }
 227
 228 static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
 229                                                  union perf_event *event __maybe_unused,
 230                                                  struct perf_evlist **pevlist
 231                                                  __maybe_unused)
 232 {
 233         if (dump_trace)
 234                 perf_event__fprintf_event_update(event, stdout);
 235
 236         dump_printf(": unhandled!\n");
 237         return 0;
 238 }
 239
 240 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
 241                                      union perf_event *event __maybe_unused,
 242                                      struct perf_sample *sample __maybe_unused,
 243                                      struct perf_evsel *evsel __maybe_unused,
 244                                      struct machine *machine __maybe_unused)
 245 {
 246         dump_printf(": unhandled!\n");
 247         return 0;
 248 }
 249
 250 static int process_event_stub(struct perf_tool *tool __maybe_unused,
 251                               union perf_event *event __maybe_unused,
 252                               struct perf_sample *sample __maybe_unused,
 253                               struct machine *machine __maybe_unused)
 254 {
 255         dump_printf(": unhandled!\n");
 256         return 0;
 257 }
 258
 259 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
 260                                        union perf_event *event __maybe_unused,
 261                                        struct ordered_events *oe __maybe_unused)
 262 {
 263         dump_printf(": unhandled!\n");
 264         return 0;
 265 }
 266
 267 static int process_finished_round(struct perf_tool *tool,
 268                                   union perf_event *event,
 269                                   struct ordered_events *oe);
 270
 271 static int skipn(int fd, off_t n)
 272 {
 273         char buf[4096];
 274         ssize_t ret;
 275
 276         while (n > 0) {
 277                 ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
 278                 if (ret <= 0)
 279                         return ret;
 280                 n -= ret;
 281         }
 282
 283         return 0;
 284 }
 285
 286 static s64 process_event_auxtrace_stub(struct perf_tool *tool __maybe_unused,
 287                                        union perf_event *event,
 288                                        struct perf_session *session
 289                                        __maybe_unused)
 290 {
 291         dump_printf(": unhandled!\n");
 292         if (perf_data_file__is_pipe(session->file))
 293                 skipn(perf_data_file__fd(session->file), event->auxtrace.size);
 294         return event->auxtrace.size;
 295 }
 296
 297 static int process_event_op2_stub(struct perf_tool *tool __maybe_unused,
 298                                   union perf_event *event __maybe_unused,
 299                                   struct perf_session *session __maybe_unused)
 300 {
 301         dump_printf(": unhandled!\n");
 302         return 0;
 303 }
 304
 305
 306 static
 307 int process_event_thread_map_stub(struct perf_tool *tool __maybe_unused,
 308                                   union perf_event *event __maybe_unused,
 309                                   struct perf_session *session __maybe_unused)
 310 {
 311         if (dump_trace)
 312                 perf_event__fprintf_thread_map(event, stdout);
 313
 314         dump_printf(": unhandled!\n");
 315         return 0;
 316 }
 317
 318 static
 319 int process_event_cpu_map_stub(struct perf_tool *tool __maybe_unused,
 320                                union perf_event *event __maybe_unused,
 321                                struct perf_session *session __maybe_unused)
 322 {
 323         if (dump_trace)
 324                 perf_event__fprintf_cpu_map(event, stdout);
 325
 326         dump_printf(": unhandled!\n");
 327         return 0;
 328 }
 329
 330 static
 331 int process_event_stat_config_stub(struct perf_tool *tool __maybe_unused,
 332                                    union perf_event *event __maybe_unused,
 333                                    struct perf_session *session __maybe_unused)
 334 {
 335         if (dump_trace)
 336                 perf_event__fprintf_stat_config(event, stdout);
 337
 338         dump_printf(": unhandled!\n");
 339         return 0;
 340 }
 341
 342 static int process_stat_stub(struct perf_tool *tool __maybe_unused,
 343                              union perf_event *event __maybe_unused,
 344                              struct perf_session *perf_session
 345                              __maybe_unused)
 346 {
 347         if (dump_trace)
 348                 perf_event__fprintf_stat(event, stdout);
 349
 350         dump_printf(": unhandled!\n");
 351         return 0;
 352 }
 353
 354 static int process_stat_round_stub(struct perf_tool *tool __maybe_unused,
 355                                    union perf_event *event __maybe_unused,
 356                                    struct perf_session *perf_session
 357                                    __maybe_unused)
 358 {
 359         if (dump_trace)
 360                 perf_event__fprintf_stat_round(event, stdout);
 361
 362         dump_printf(": unhandled!\n");
 363         return 0;
 364 }
 365
 366 void perf_tool__fill_defaults(struct perf_tool *tool)
 367 {
 368         if (tool->sample == NULL)
 369                 tool->sample = process_event_sample_stub;
 370         if (tool->mmap == NULL)
 371                 tool->mmap = process_event_stub;
 372         if (tool->mmap2 == NULL)
 373                 tool->mmap2 = process_event_stub;
 374         if (tool->comm == NULL)
 375                 tool->comm = process_event_stub;
 376         if (tool->fork == NULL)
 377                 tool->fork = process_event_stub;
 378         if (tool->exit == NULL)
 379                 tool->exit = process_event_stub;
 380         if (tool->lost == NULL)
 381                 tool->lost = perf_event__process_lost;
 382         if (tool->lost_samples == NULL)
 383                 tool->lost_samples = perf_event__process_lost_samples;
 384         if (tool->aux == NULL)
 385                 tool->aux = perf_event__process_aux;
 386         if (tool->itrace_start == NULL)
 387                 tool->itrace_start = perf_event__process_itrace_start;
 388         if (tool->context_switch == NULL)
 389                 tool->context_switch = perf_event__process_switch;
 390         if (tool->read == NULL)
 391                 tool->read = process_event_sample_stub;
 392         if (tool->throttle == NULL)
 393                 tool->throttle = process_event_stub;
 394         if (tool->unthrottle == NULL)
 395                 tool->unthrottle = process_event_stub;
 396         if (tool->attr == NULL)
 397                 tool->attr = process_event_synth_attr_stub;
 398         if (tool->event_update == NULL)
 399                 tool->event_update = process_event_synth_event_update_stub;
 400         if (tool->tracing_data == NULL)
 401                 tool->tracing_data = process_event_synth_tracing_data_stub;
 402         if (tool->build_id == NULL)
 403                 tool->build_id = process_event_op2_stub;
 404         if (tool->finished_round == NULL) {
 405                 if (tool->ordered_events)
 406                         tool->finished_round = process_finished_round;
 407                 else
 408                         tool->finished_round = process_finished_round_stub;
 409         }
 410         if (tool->id_index == NULL)
 411                 tool->id_index = process_event_op2_stub;
 412         if (tool->auxtrace_info == NULL)
 413                 tool->auxtrace_info = process_event_op2_stub;
 414         if (tool->auxtrace == NULL)
 415                 tool->auxtrace = process_event_auxtrace_stub;
 416         if (tool->auxtrace_error == NULL)
 417                 tool->auxtrace_error = process_event_op2_stub;
 418         if (tool->thread_map == NULL)
 419                 tool->thread_map = process_event_thread_map_stub;
 420         if (tool->cpu_map == NULL)
 421                 tool->cpu_map = process_event_cpu_map_stub;
 422         if (tool->stat_config == NULL)
 423                 tool->stat_config = process_event_stat_config_stub;
 424         if (tool->stat == NULL)
 425                 tool->stat = process_stat_stub;
 426         if (tool->stat_round == NULL)
 427                 tool->stat_round = process_stat_round_stub;
 428         if (tool->time_conv == NULL)
 429                 tool->time_conv = process_event_op2_stub;
 430 }
 431
 432 static void swap_sample_id_all(union perf_event *event, void *data)
 433 {
 434         void *end = (void *) event + event->header.size;
 435         int size = end - data;
 436
 437         BUG_ON(size % sizeof(u64));
 438         mem_bswap_64(data, size);
 439 }
 440
 441 static void perf_event__all64_swap(union perf_event *event,
 442                                    bool sample_id_all __maybe_unused)
 443 {
 444         struct perf_event_header *hdr = &event->header;
 445         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 446 }
 447
 448 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
 449 {
 450         event->comm.pid = bswap_32(event->comm.pid);
 451         event->comm.tid = bswap_32(event->comm.tid);
 452
 453         if (sample_id_all) {
 454                 void *data = &event->comm.comm;
 455
 456                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 457                 swap_sample_id_all(event, data);
 458         }
 459 }
 460
 461 static void perf_event__mmap_swap(union perf_event *event,
 462                                   bool sample_id_all)
 463 {
 464         event->mmap.pid   = bswap_32(event->mmap.pid);
 465         event->mmap.tid   = bswap_32(event->mmap.tid);
 466         event->mmap.start = bswap_64(event->mmap.start);
 467         event->mmap.len   = bswap_64(event->mmap.len);
 468         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 469
 470         if (sample_id_all) {
 471                 void *data = &event->mmap.filename;
 472
 473                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 474                 swap_sample_id_all(event, data);
 475         }
 476 }
 477
 478 static void perf_event__mmap2_swap(union perf_event *event,
 479                                   bool sample_id_all)
 480 {
 481         event->mmap2.pid   = bswap_32(event->mmap2.pid);
 482         event->mmap2.tid   = bswap_32(event->mmap2.tid);
 483         event->mmap2.start = bswap_64(event->mmap2.start);
 484         event->mmap2.len   = bswap_64(event->mmap2.len);
 485         event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
 486         event->mmap2.maj   = bswap_32(event->mmap2.maj);
 487         event->mmap2.min   = bswap_32(event->mmap2.min);
 488         event->mmap2.ino   = bswap_64(event->mmap2.ino);
 489
 490         if (sample_id_all) {
 491                 void *data = &event->mmap2.filename;
 492
 493                 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
 494                 swap_sample_id_all(event, data);
 495         }
 496 }
 497 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
 498 {
 499         event->fork.pid  = bswap_32(event->fork.pid);
 500         event->fork.tid  = bswap_32(event->fork.tid);
 501         event->fork.ppid = bswap_32(event->fork.ppid);
 502         event->fork.ptid = bswap_32(event->fork.ptid);
 503         event->fork.time = bswap_64(event->fork.time);
 504
 505         if (sample_id_all)
 506                 swap_sample_id_all(event, &event->fork + 1);
 507 }
 508
 509 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
 510 {
 511         event->read.pid          = bswap_32(event->read.pid);
 512         event->read.tid          = bswap_32(event->read.tid);
 513         event->read.value        = bswap_64(event->read.value);
 514         event->read.time_enabled = bswap_64(event->read.time_enabled);
 515         event->read.time_running = bswap_64(event->read.time_running);
 516         event->read.id           = bswap_64(event->read.id);
 517
 518         if (sample_id_all)
 519                 swap_sample_id_all(event, &event->read + 1);
 520 }
 521
 522 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
 523 {
 524         event->aux.aux_offset = bswap_64(event->aux.aux_offset);
 525         event->aux.aux_size   = bswap_64(event->aux.aux_size);
 526         event->aux.flags      = bswap_64(event->aux.flags);
 527
 528         if (sample_id_all)
 529                 swap_sample_id_all(event, &event->aux + 1);
 530 }
 531
 532 static void perf_event__itrace_start_swap(union perf_event *event,
 533                                           bool sample_id_all)
 534 {
 535         event->itrace_start.pid  = bswap_32(event->itrace_start.pid);
 536         event->itrace_start.tid  = bswap_32(event->itrace_start.tid);
 537
 538         if (sample_id_all)
 539                 swap_sample_id_all(event, &event->itrace_start + 1);
 540 }
 541
 542 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
 543 {
 544         if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
 545                 event->context_switch.next_prev_pid =
 546                                 bswap_32(event->context_switch.next_prev_pid);
 547                 event->context_switch.next_prev_tid =
 548                                 bswap_32(event->context_switch.next_prev_tid);
 549         }
 550
 551         if (sample_id_all)
 552                 swap_sample_id_all(event, &event->context_switch + 1);
 553 }
 554
 555 static void perf_event__throttle_swap(union perf_event *event,
 556                                       bool sample_id_all)
 557 {
 558         event->throttle.time      = bswap_64(event->throttle.time);
 559         event->throttle.id        = bswap_64(event->throttle.id);
 560         event->throttle.stream_id = bswap_64(event->throttle.stream_id);
 561
 562         if (sample_id_all)
 563                 swap_sample_id_all(event, &event->throttle + 1);
 564 }
 565
 566 static u8 revbyte(u8 b)
 567 {
 568         int rev = (b >> 4) | ((b & 0xf) << 4);
 569         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 570         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 571         return (u8) rev;
 572 }
 573
 574 /*
 575  * XXX this is hack in attempt to carry flags bitfield
 576  * through endian village. ABI says:
 577  *
 578  * Bit-fields are allocated from right to left (least to most significant)
 579  * on little-endian implementations and from left to right (most to least
 580  * significant) on big-endian implementations.
 581  *
 582  * The above seems to be byte specific, so we need to reverse each
 583  * byte of the bitfield. 'Internet' also says this might be implementation
 584  * specific and we probably need proper fix and carry perf_event_attr
 585  * bitfield flags in separate data file FEAT_ section. Thought this seems
 586  * to work for now.
 587  */
 588 static void swap_bitfield(u8 *p, unsigned len)
 589 {
 590         unsigned i;
 591
 592         for (i = 0; i < len; i++) {
 593                 *p = revbyte(*p);
 594                 p++;
 595         }
 596 }
 597
 598 /* exported for swapping attributes in file header */
 599 void perf_event__attr_swap(struct perf_event_attr *attr)
 600 {
 601         attr->type              = bswap_32(attr->type);
 602         attr->size              = bswap_32(attr->size);
 603
 604 #define bswap_safe(f, n)                                        \
 605         (attr->size > (offsetof(struct perf_event_attr, f) +    \
 606                        sizeof(attr->f) * (n)))
 607 #define bswap_field(f, sz)                      \
 608 do {                                            \
 609         if (bswap_safe(f, 0))                   \
 610                 attr->f = bswap_##sz(attr->f);  \
 611 } while(0)
 612 #define bswap_field_16(f) bswap_field(f, 16)
 613 #define bswap_field_32(f) bswap_field(f, 32)
 614 #define bswap_field_64(f) bswap_field(f, 64)
 615
 616         bswap_field_64(config);
 617         bswap_field_64(sample_period);
 618         bswap_field_64(sample_type);
 619         bswap_field_64(read_format);
 620         bswap_field_32(wakeup_events);
 621         bswap_field_32(bp_type);
 622         bswap_field_64(bp_addr);
 623         bswap_field_64(bp_len);
 624         bswap_field_64(branch_sample_type);
 625         bswap_field_64(sample_regs_user);
 626         bswap_field_32(sample_stack_user);
 627         bswap_field_32(aux_watermark);
 628         bswap_field_16(sample_max_stack);
 629
 630         /*
 631          * After read_format are bitfields. Check read_format because
 632          * we are unable to use offsetof on bitfield.
 633          */
 634         if (bswap_safe(read_format, 1))
 635                 swap_bitfield((u8 *) (&attr->read_format + 1),
 636                               sizeof(u64));
 637 #undef bswap_field_64
 638 #undef bswap_field_32
 639 #undef bswap_field
 640 #undef bswap_safe
 641 }
 642
 643 static void perf_event__hdr_attr_swap(union perf_event *event,
 644                                       bool sample_id_all __maybe_unused)
 645 {
 646         size_t size;
 647
 648         perf_event__attr_swap(&event->attr.attr);
 649
 650         size = event->header.size;
 651         size -= (void *)&event->attr.id - (void *)event;
 652         mem_bswap_64(event->attr.id, size);
 653 }
 654
 655 static void perf_event__event_update_swap(union perf_event *event,
 656                                           bool sample_id_all __maybe_unused)
 657 {
 658         event->event_update.type = bswap_64(event->event_update.type);
 659         event->event_update.id   = bswap_64(event->event_update.id);
 660 }
 661
 662 static void perf_event__event_type_swap(union perf_event *event,
 663                                         bool sample_id_all __maybe_unused)
 664 {
 665         event->event_type.event_type.event_id =
 666                 bswap_64(event->event_type.event_type.event_id);
 667 }
 668
 669 static void perf_event__tracing_data_swap(union perf_event *event,
 670                                           bool sample_id_all __maybe_unused)
 671 {
 672         event->tracing_data.size = bswap_32(event->tracing_data.size);
 673 }
 674
 675 static void perf_event__auxtrace_info_swap(union perf_event *event,
 676                                            bool sample_id_all __maybe_unused)
 677 {
 678         size_t size;
 679
 680         event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
 681
 682         size = event->header.size;
 683         size -= (void *)&event->auxtrace_info.priv - (void *)event;
 684         mem_bswap_64(event->auxtrace_info.priv, size);
 685 }
 686
 687 static void perf_event__auxtrace_swap(union perf_event *event,
 688                                       bool sample_id_all __maybe_unused)
 689 {
 690         event->auxtrace.size      = bswap_64(event->auxtrace.size);
 691         event->auxtrace.offset    = bswap_64(event->auxtrace.offset);
 692         event->auxtrace.reference = bswap_64(event->auxtrace.reference);
 693         event->auxtrace.idx       = bswap_32(event->auxtrace.idx);
 694         event->auxtrace.tid       = bswap_32(event->auxtrace.tid);
 695         event->auxtrace.cpu       = bswap_32(event->auxtrace.cpu);
 696 }
 697
 698 static void perf_event__auxtrace_error_swap(union perf_event *event,
 699                                             bool sample_id_all __maybe_unused)
 700 {
 701         event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
 702         event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
 703         event->auxtrace_error.cpu  = bswap_32(event->auxtrace_error.cpu);
 704         event->auxtrace_error.pid  = bswap_32(event->auxtrace_error.pid);
 705         event->auxtrace_error.tid  = bswap_32(event->auxtrace_error.tid);
 706         event->auxtrace_error.ip   = bswap_64(event->auxtrace_error.ip);
 707 }
 708
 709 static void perf_event__thread_map_swap(union perf_event *event,
 710                                         bool sample_id_all __maybe_unused)
 711 {
 712         unsigned i;
 713
 714         event->thread_map.nr = bswap_64(event->thread_map.nr);
 715
 716         for (i = 0; i < event->thread_map.nr; i++)
 717                 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
 718 }
 719
 720 static void perf_event__cpu_map_swap(union perf_event *event,
 721                                      bool sample_id_all __maybe_unused)
 722 {
 723         struct cpu_map_data *data = &event->cpu_map.data;
 724         struct cpu_map_entries *cpus;
 725         struct cpu_map_mask *mask;
 726         unsigned i;
 727
 728         data->type = bswap_64(data->type);
 729
 730         switch (data->type) {
 731         case PERF_CPU_MAP__CPUS:
 732                 cpus = (struct cpu_map_entries *)data->data;
 733
 734                 cpus->nr = bswap_16(cpus->nr);
 735
 736                 for (i = 0; i < cpus->nr; i++)
 737                         cpus->cpu[i] = bswap_16(cpus->cpu[i]);
 738                 break;
 739         case PERF_CPU_MAP__MASK:
 740                 mask = (struct cpu_map_mask *) data->data;
 741
 742                 mask->nr = bswap_16(mask->nr);
 743                 mask->long_size = bswap_16(mask->long_size);
 744
 745                 switch (mask->long_size) {
 746                 case 4: mem_bswap_32(&mask->mask, mask->nr); break;
 747                 case 8: mem_bswap_64(&mask->mask, mask->nr); break;
 748                 default:
 749                         pr_err("cpu_map swap: unsupported long size\n");
 750                 }
 751         default:
 752                 break;
 753         }
 754 }
 755
 756 static void perf_event__stat_config_swap(union perf_event *event,
 757                                          bool sample_id_all __maybe_unused)
 758 {
 759         u64 size;
 760
 761         size  = event->stat_config.nr * sizeof(event->stat_config.data[0]);
 762         size += 1; /* nr item itself */
 763         mem_bswap_64(&event->stat_config.nr, size);
 764 }
 765
 766 static void perf_event__stat_swap(union perf_event *event,
 767                                   bool sample_id_all __maybe_unused)
 768 {
 769         event->stat.id     = bswap_64(event->stat.id);
 770         event->stat.thread = bswap_32(event->stat.thread);
 771         event->stat.cpu    = bswap_32(event->stat.cpu);
 772         event->stat.val    = bswap_64(event->stat.val);
 773         event->stat.ena    = bswap_64(event->stat.ena);
 774         event->stat.run    = bswap_64(event->stat.run);
 775 }
 776
 777 static void perf_event__stat_round_swap(union perf_event *event,
 778                                         bool sample_id_all __maybe_unused)
 779 {
 780         event->stat_round.type = bswap_64(event->stat_round.type);
 781         event->stat_round.time = bswap_64(event->stat_round.time);
 782 }
 783
 784 typedef void (*perf_event__swap_op)(union perf_event *event,
 785                                     bool sample_id_all);
 786
 787 static perf_event__swap_op perf_event__swap_ops[] = {
 788         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 789         [PERF_RECORD_MMAP2]               = perf_event__mmap2_swap,
 790         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 791         [PERF_RECORD_FORK]                = perf_event__task_swap,
 792         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 793         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 794         [PERF_RECORD_READ]                = perf_event__read_swap,
 795         [PERF_RECORD_THROTTLE]            = perf_event__throttle_swap,
 796         [PERF_RECORD_UNTHROTTLE]          = perf_event__throttle_swap,
 797         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 798         [PERF_RECORD_AUX]                 = perf_event__aux_swap,
 799         [PERF_RECORD_ITRACE_START]        = perf_event__itrace_start_swap,
 800         [PERF_RECORD_LOST_SAMPLES]        = perf_event__all64_swap,
 801         [PERF_RECORD_SWITCH]              = perf_event__switch_swap,
 802         [PERF_RECORD_SWITCH_CPU_WIDE]     = perf_event__switch_swap,
 803         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 804         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 805         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 806         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 807         [PERF_RECORD_ID_INDEX]            = perf_event__all64_swap,
 808         [PERF_RECORD_AUXTRACE_INFO]       = perf_event__auxtrace_info_swap,
 809         [PERF_RECORD_AUXTRACE]            = perf_event__auxtrace_swap,
 810         [PERF_RECORD_AUXTRACE_ERROR]      = perf_event__auxtrace_error_swap,
 811         [PERF_RECORD_THREAD_MAP]          = perf_event__thread_map_swap,
 812         [PERF_RECORD_CPU_MAP]             = perf_event__cpu_map_swap,
 813         [PERF_RECORD_STAT_CONFIG]         = perf_event__stat_config_swap,
 814         [PERF_RECORD_STAT]                = perf_event__stat_swap,
 815         [PERF_RECORD_STAT_ROUND]          = perf_event__stat_round_swap,
 816         [PERF_RECORD_EVENT_UPDATE]        = perf_event__event_update_swap,
 817         [PERF_RECORD_TIME_CONV]           = perf_event__all64_swap,
 818         [PERF_RECORD_HEADER_MAX]          = NULL,
 819 };
 820
 821 /*
 822  * When perf record finishes a pass on every buffers, it records this pseudo
 823  * event.
 824  * We record the max timestamp t found in the pass n.
 825  * Assuming these timestamps are monotonic across cpus, we know that if
 826  * a buffer still has events with timestamps below t, they will be all
 827  * available and then read in the pass n + 1.
 828  * Hence when we start to read the pass n + 2, we can safely flush every
 829  * events with timestamps below t.
 830  *
 831  *    ============ PASS n =================
 832  *       CPU 0         |   CPU 1
 833  *                     |
 834  *    cnt1 timestamps  |   cnt2 timestamps
 835  *          1          |         2
 836  *          2          |         3
 837  *          -          |         4  <--- max recorded
 838  *
 839  *    ============ PASS n + 1 ==============
 840  *       CPU 0         |   CPU 1
 841  *                     |
 842  *    cnt1 timestamps  |   cnt2 timestamps
 843  *          3          |         5
 844  *          4          |         6
 845  *          5          |         7 <---- max recorded
 846  *
 847  *      Flush every events below timestamp 4
 848  *
 849  *    ============ PASS n + 2 ==============
 850  *       CPU 0         |   CPU 1
 851  *                     |
 852  *    cnt1 timestamps  |   cnt2 timestamps
 853  *          6          |         8
 854  *          7          |         9
 855  *          -          |         10
 856  *
 857  *      Flush every events below timestamp 7
 858  *      etc...
 859  */
 860 static int process_finished_round(struct perf_tool *tool __maybe_unused,
 861                                   union perf_event *event __maybe_unused,
 862                                   struct ordered_events *oe)
 863 {
 864         if (dump_trace)
 865                 fprintf(stdout, "\n");
 866         return ordered_events__flush(oe, OE_FLUSH__ROUND);
 867 }
 868
 869 int perf_session__queue_event(struct perf_session *s, union perf_event *event,
 870                               struct perf_sample *sample, u64 file_offset)
 871 {
 872         return ordered_events__queue(&s->ordered_events, event, sample, file_offset);
 873 }
 874
 875 static void callchain__lbr_callstack_printf(struct perf_sample *sample)
 876 {
 877         struct ip_callchain *callchain = sample->callchain;
 878         struct branch_stack *lbr_stack = sample->branch_stack;
 879         u64 kernel_callchain_nr = callchain->nr;
 880         unsigned int i;
 881
 882         for (i = 0; i < kernel_callchain_nr; i++) {
 883                 if (callchain->ips[i] == PERF_CONTEXT_USER)
 884                         break;
 885         }
 886
 887         if ((i != kernel_callchain_nr) && lbr_stack->nr) {
 888                 u64 total_nr;
 889                 /*
 890                  * LBR callstack can only get user call chain,
 891                  * i is kernel call chain number,
 892                  * 1 is PERF_CONTEXT_USER.
 893                  *
 894                  * The user call chain is stored in LBR registers.
 895                  * LBR are pair registers. The caller is stored
 896                  * in "from" register, while the callee is stored
 897                  * in "to" register.
 898                  * For example, there is a call stack
 899                  * "A"->"B"->"C"->"D".
 900                  * The LBR registers will recorde like
 901                  * "C"->"D", "B"->"C", "A"->"B".
 902                  * So only the first "to" register and all "from"
 903                  * registers are needed to construct the whole stack.
 904                  */
 905                 total_nr = i + 1 + lbr_stack->nr + 1;
 906                 kernel_callchain_nr = i + 1;
 907
 908                 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
 909
 910                 for (i = 0; i < kernel_callchain_nr; i++)
 911                         printf("..... %2d: %016" PRIx64 "\n",
 912                                i, callchain->ips[i]);
 913
 914                 printf("..... %2d: %016" PRIx64 "\n",
 915                        (int)(kernel_callchain_nr), lbr_stack->entries[0].to);
 916                 for (i = 0; i < lbr_stack->nr; i++)
 917                         printf("..... %2d: %016" PRIx64 "\n",
 918                                (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
 919         }
 920 }
 921
 922 static void callchain__printf(struct perf_evsel *evsel,
 923                               struct perf_sample *sample)
 924 {
 925         unsigned int i;
 926         struct ip_callchain *callchain = sample->callchain;
 927
 928         if (perf_evsel__has_branch_callstack(evsel))
 929                 callchain__lbr_callstack_printf(sample);
 930
 931         printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
 932
 933         for (i = 0; i < callchain->nr; i++)
 934                 printf("..... %2d: %016" PRIx64 "\n",
 935                        i, callchain->ips[i]);
 936 }
 937
 938 static void branch_stack__printf(struct perf_sample *sample)
 939 {
 940         uint64_t i;
 941
 942         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 943
 944         for (i = 0; i < sample->branch_stack->nr; i++) {
 945                 struct branch_entry *e = &sample->branch_stack->entries[i];
 946
 947                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
 948                         i, e->from, e->to,
 949                         (unsigned short)e->flags.cycles,
 950                         e->flags.mispred ? "M" : " ",
 951                         e->flags.predicted ? "P" : " ",
 952                         e->flags.abort ? "A" : " ",
 953                         e->flags.in_tx ? "T" : " ",
 954                         (unsigned)e->flags.reserved);
 955         }
 956 }
 957
 958 static void regs_dump__printf(u64 mask, u64 *regs)
 959 {
 960         unsigned rid, i = 0;
 961
 962         for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
 963                 u64 val = regs[i++];
 964
 965                 printf(".... %-5s 0x%" PRIx64 "\n",
 966                        perf_reg_name(rid), val);
 967         }
 968 }
 969
 970 static const char *regs_abi[] = {
 971         [PERF_SAMPLE_REGS_ABI_NONE] = "none",
 972         [PERF_SAMPLE_REGS_ABI_32] = "32-bit",
 973         [PERF_SAMPLE_REGS_ABI_64] = "64-bit",
 974 };
 975
 976 static inline const char *regs_dump_abi(struct regs_dump *d)
 977 {
 978         if (d->abi > PERF_SAMPLE_REGS_ABI_64)
 979                 return "unknown";
 980
 981         return regs_abi[d->abi];
 982 }
 983
 984 static void regs__printf(const char *type, struct regs_dump *regs)
 985 {
 986         u64 mask = regs->mask;
 987
 988         printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
 989                type,
 990                mask,
 991                regs_dump_abi(regs));
 992
 993         regs_dump__printf(mask, regs->regs);
 994 }
 995
 996 static void regs_user__printf(struct perf_sample *sample)
 997 {
 998         struct regs_dump *user_regs = &sample->user_regs;
 999
1000         if (user_regs->regs)
1001                 regs__printf("user", user_regs);
1002 }
1003
1004 static void regs_intr__printf(struct perf_sample *sample)
1005 {
1006         struct regs_dump *intr_regs = &sample->intr_regs;
1007
1008         if (intr_regs->regs)
1009                 regs__printf("intr", intr_regs);
1010 }
1011
1012 static void stack_user__printf(struct stack_dump *dump)
1013 {
1014         printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
1015                dump->size, dump->offset);
1016 }
1017
1018 static void perf_evlist__print_tstamp(struct perf_evlist *evlist,
1019                                        union perf_event *event,
1020                                        struct perf_sample *sample)
1021 {
1022         u64 sample_type = __perf_evlist__combined_sample_type(evlist);
1023
1024         if (event->header.type != PERF_RECORD_SAMPLE &&
1025             !perf_evlist__sample_id_all(evlist)) {
1026                 fputs("-1 -1 ", stdout);
1027                 return;
1028         }
1029
1030         if ((sample_type & PERF_SAMPLE_CPU))
1031                 printf("%u ", sample->cpu);
1032
1033         if (sample_type & PERF_SAMPLE_TIME)
1034                 printf("%" PRIu64 " ", sample->time);
1035 }
1036
1037 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
1038 {
1039         printf("... sample_read:\n");
1040
1041         if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1042                 printf("...... time enabled %016" PRIx64 "\n",
1043                        sample->read.time_enabled);
1044
1045         if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1046                 printf("...... time running %016" PRIx64 "\n",
1047                        sample->read.time_running);
1048
1049         if (read_format & PERF_FORMAT_GROUP) {
1050                 u64 i;
1051
1052                 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
1053
1054                 for (i = 0; i < sample->read.group.nr; i++) {
1055                         struct sample_read_value *value;
1056
1057                         value = &sample->read.group.values[i];
1058                         printf("..... id %016" PRIx64
1059                                ", value %016" PRIx64 "\n",
1060                                value->id, value->value);
1061                 }
1062         } else
1063                 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
1064                         sample->read.one.id, sample->read.one.value);
1065 }
1066
1067 static void dump_event(struct perf_evlist *evlist, union perf_event *event,
1068                        u64 file_offset, struct perf_sample *sample)
1069 {
1070         if (!dump_trace)
1071                 return;
1072
1073         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
1074                file_offset, event->header.size, event->header.type);
1075
1076         trace_event(event);
1077
1078         if (sample)
1079                 perf_evlist__print_tstamp(evlist, event, sample);
1080
1081         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
1082                event->header.size, perf_event__name(event->header.type));
1083 }
1084
1085 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
1086                         struct perf_sample *sample)
1087 {
1088         u64 sample_type;
1089
1090         if (!dump_trace)
1091                 return;
1092
1093         printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
1094                event->header.misc, sample->pid, sample->tid, sample->ip,
1095                sample->period, sample->addr);
1096
1097         sample_type = evsel->attr.sample_type;
1098
1099         if (sample_type & PERF_SAMPLE_CALLCHAIN)
1100                 callchain__printf(evsel, sample);
1101
1102         if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !perf_evsel__has_branch_callstack(evsel))
1103                 branch_stack__printf(sample);
1104
1105         if (sample_type & PERF_SAMPLE_REGS_USER)
1106                 regs_user__printf(sample);
1107
1108         if (sample_type & PERF_SAMPLE_REGS_INTR)
1109                 regs_intr__printf(sample);
1110
1111         if (sample_type & PERF_SAMPLE_STACK_USER)
1112                 stack_user__printf(&sample->user_stack);
1113
1114         if (sample_type & PERF_SAMPLE_WEIGHT)
1115                 printf("... weight: %" PRIu64 "\n", sample->weight);
1116
1117         if (sample_type & PERF_SAMPLE_DATA_SRC)
1118                 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
1119
1120         if (sample_type & PERF_SAMPLE_TRANSACTION)
1121                 printf("... transaction: %" PRIx64 "\n", sample->transaction);
1122
1123         if (sample_type & PERF_SAMPLE_READ)
1124                 sample_read__printf(sample, evsel->attr.read_format);
1125 }
1126
1127 static struct machine *machines__find_for_cpumode(struct machines *machines,
1128                                                union perf_event *event,
1129                                                struct perf_sample *sample)
1130 {
1131         struct machine *machine;
1132
1133         if (perf_guest &&
1134             ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
1135              (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
1136                 u32 pid;
1137
1138                 if (event->header.type == PERF_RECORD_MMAP
1139                     || event->header.type == PERF_RECORD_MMAP2)
1140                         pid = event->mmap.pid;
1141                 else
1142                         pid = sample->pid;
1143
1144                 machine = machines__find(machines, pid);
1145                 if (!machine)
1146                         machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
1147                 return machine;
1148         }
1149
1150         return &machines->host;
1151 }
1152
1153 static int deliver_sample_value(struct perf_evlist *evlist,
1154                                 struct perf_tool *tool,
1155                                 union perf_event *event,
1156                                 struct perf_sample *sample,
1157                                 struct sample_read_value *v,
1158                                 struct machine *machine)
1159 {
1160         struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
1161
1162         if (sid) {
1163                 sample->id     = v->id;
1164                 sample->period = v->value - sid->period;
1165                 sid->period    = v->value;
1166         }
1167
1168         if (!sid || sid->evsel == NULL) {
1169                 ++evlist->stats.nr_unknown_id;
1170                 return 0;
1171         }
1172
1173         return tool->sample(tool, event, sample, sid->evsel, machine);
1174 }
1175
1176 static int deliver_sample_group(struct perf_evlist *evlist,
1177                                 struct perf_tool *tool,
1178                                 union  perf_event *event,
1179                                 struct perf_sample *sample,
1180                                 struct machine *machine)
1181 {
1182         int ret = -EINVAL;
1183         u64 i;
1184
1185         for (i = 0; i < sample->read.group.nr; i++) {
1186                 ret = deliver_sample_value(evlist, tool, event, sample,
1187                                            &sample->read.group.values[i],
1188                                            machine);
1189                 if (ret)
1190                         break;
1191         }
1192
1193         return ret;
1194 }
1195
1196 static int
1197  perf_evlist__deliver_sample(struct perf_evlist *evlist,
1198                              struct perf_tool *tool,
1199                              union  perf_event *event,
1200                              struct perf_sample *sample,
1201                              struct perf_evsel *evsel,
1202                              struct machine *machine)
1203 {
1204         /* We know evsel != NULL. */
1205         u64 sample_type = evsel->attr.sample_type;
1206         u64 read_format = evsel->attr.read_format;
1207
1208         /* Standard sample delivery. */
1209         if (!(sample_type & PERF_SAMPLE_READ))
1210                 return tool->sample(tool, event, sample, evsel, machine);
1211
1212         /* For PERF_SAMPLE_READ we have either single or group mode. */
1213         if (read_format & PERF_FORMAT_GROUP)
1214                 return deliver_sample_group(evlist, tool, event, sample,
1215                                             machine);
1216         else
1217                 return deliver_sample_value(evlist, tool, event, sample,
1218                                             &sample->read.one, machine);
1219 }
1220
1221 static int machines__deliver_event(struct machines *machines,
1222                                    struct perf_evlist *evlist,
1223                                    union perf_event *event,
1224                                    struct perf_sample *sample,
1225                                    struct perf_tool *tool, u64 file_offset)
1226 {
1227         struct perf_evsel *evsel;
1228         struct machine *machine;
1229
1230         dump_event(evlist, event, file_offset, sample);
1231
1232         evsel = perf_evlist__id2evsel(evlist, sample->id);
1233
1234         machine = machines__find_for_cpumode(machines, event, sample);
1235
1236         switch (event->header.type) {
1237         case PERF_RECORD_SAMPLE:
1238                 if (evsel == NULL) {
1239                         ++evlist->stats.nr_unknown_id;
1240                         return 0;
1241                 }
1242                 dump_sample(evsel, event, sample);
1243                 if (machine == NULL) {
1244                         ++evlist->stats.nr_unprocessable_samples;
1245                         return 0;
1246                 }
1247                 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
1248         case PERF_RECORD_MMAP:
1249                 return tool->mmap(tool, event, sample, machine);
1250         case PERF_RECORD_MMAP2:
1251                 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
1252                         ++evlist->stats.nr_proc_map_timeout;
1253                 return tool->mmap2(tool, event, sample, machine);
1254         case PERF_RECORD_COMM:
1255                 return tool->comm(tool, event, sample, machine);
1256         case PERF_RECORD_NAMESPACES:
1257                 return tool->namespaces(tool, event, sample, machine);
1258         case PERF_RECORD_FORK:
1259                 return tool->fork(tool, event, sample, machine);
1260         case PERF_RECORD_EXIT:
1261                 return tool->exit(tool, event, sample, machine);
1262         case PERF_RECORD_LOST:
1263                 if (tool->lost == perf_event__process_lost)
1264                         evlist->stats.total_lost += event->lost.lost;
1265                 return tool->lost(tool, event, sample, machine);
1266         case PERF_RECORD_LOST_SAMPLES:
1267                 if (tool->lost_samples == perf_event__process_lost_samples)
1268                         evlist->stats.total_lost_samples += event->lost_samples.lost;
1269                 return tool->lost_samples(tool, event, sample, machine);
1270         case PERF_RECORD_READ:
1271                 return tool->read(tool, event, sample, evsel, machine);
1272         case PERF_RECORD_THROTTLE:
1273                 return tool->throttle(tool, event, sample, machine);
1274         case PERF_RECORD_UNTHROTTLE:
1275                 return tool->unthrottle(tool, event, sample, machine);
1276         case PERF_RECORD_AUX:
1277                 if (tool->aux == perf_event__process_aux) {
1278                         if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
1279                                 evlist->stats.total_aux_lost += 1;
1280                         if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
1281                                 evlist->stats.total_aux_partial += 1;
1282                 }
1283                 return tool->aux(tool, event, sample, machine);
1284         case PERF_RECORD_ITRACE_START:
1285                 return tool->itrace_start(tool, event, sample, machine);
1286         case PERF_RECORD_SWITCH:
1287         case PERF_RECORD_SWITCH_CPU_WIDE:
1288                 return tool->context_switch(tool, event, sample, machine);
1289         default:
1290                 ++evlist->stats.nr_unknown_events;
1291                 return -1;
1292         }
1293 }
1294
1295 static int perf_session__deliver_event(struct perf_session *session,
1296                                        union perf_event *event,
1297                                        struct perf_sample *sample,
1298                                        struct perf_tool *tool,
1299                                        u64 file_offset)
1300 {
1301         int ret;
1302
1303         ret = auxtrace__process_event(session, event, sample, tool);
1304         if (ret < 0)
1305                 return ret;
1306         if (ret > 0)
1307                 return 0;
1308
1309         return machines__deliver_event(&session->machines, session->evlist,
1310                                        event, sample, tool, file_offset);
1311 }
1312
1313 static s64 perf_session__process_user_event(struct perf_session *session,
1314                                             union perf_event *event,
1315                                             u64 file_offset)
1316 {
1317         struct ordered_events *oe = &session->ordered_events;
1318         struct perf_tool *tool = session->tool;
1319         int fd = perf_data_file__fd(session->file);
1320         int err;
1321
1322         dump_event(session->evlist, event, file_offset, NULL);
1323
1324         /* These events are processed right away */
1325         switch (event->header.type) {
1326         case PERF_RECORD_HEADER_ATTR:
1327                 err = tool->attr(tool, event, &session->evlist);
1328                 if (err == 0) {
1329                         perf_session__set_id_hdr_size(session);
1330                         perf_session__set_comm_exec(session);
1331                 }
1332                 return err;
1333         case PERF_RECORD_EVENT_UPDATE:
1334                 return tool->event_update(tool, event, &session->evlist);
1335         case PERF_RECORD_HEADER_EVENT_TYPE:
1336                 /*
1337                  * Depreceated, but we need to handle it for sake
1338                  * of old data files create in pipe mode.
1339                  */
1340                 return 0;
1341         case PERF_RECORD_HEADER_TRACING_DATA:
1342                 /* setup for reading amidst mmap */
1343                 lseek(fd, file_offset, SEEK_SET);
1344                 return tool->tracing_data(tool, event, session);
1345         case PERF_RECORD_HEADER_BUILD_ID:
1346                 return tool->build_id(tool, event, session);
1347         case PERF_RECORD_FINISHED_ROUND:
1348                 return tool->finished_round(tool, event, oe);
1349         case PERF_RECORD_ID_INDEX:
1350                 return tool->id_index(tool, event, session);
1351         case PERF_RECORD_AUXTRACE_INFO:
1352                 return tool->auxtrace_info(tool, event, session);
1353         case PERF_RECORD_AUXTRACE:
1354                 /* setup for reading amidst mmap */
1355                 lseek(fd, file_offset + event->header.size, SEEK_SET);
1356                 return tool->auxtrace(tool, event, session);
1357         case PERF_RECORD_AUXTRACE_ERROR:
1358                 perf_session__auxtrace_error_inc(session, event);
1359                 return tool->auxtrace_error(tool, event, session);
1360         case PERF_RECORD_THREAD_MAP:
1361                 return tool->thread_map(tool, event, session);
1362         case PERF_RECORD_CPU_MAP:
1363                 return tool->cpu_map(tool, event, session);
1364         case PERF_RECORD_STAT_CONFIG:
1365                 return tool->stat_config(tool, event, session);
1366         case PERF_RECORD_STAT:
1367                 return tool->stat(tool, event, session);
1368         case PERF_RECORD_STAT_ROUND:
1369                 return tool->stat_round(tool, event, session);
1370         case PERF_RECORD_TIME_CONV:
1371                 session->time_conv = event->time_conv;
1372                 return tool->time_conv(tool, event, session);
1373         default:
1374                 return -EINVAL;
1375         }
1376 }
1377
1378 int perf_session__deliver_synth_event(struct perf_session *session,
1379                                       union perf_event *event,
1380                                       struct perf_sample *sample)
1381 {
1382         struct perf_evlist *evlist = session->evlist;
1383         struct perf_tool *tool = session->tool;
1384
1385         events_stats__inc(&evlist->stats, event->header.type);
1386
1387         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1388                 return perf_session__process_user_event(session, event, 0);
1389
1390         return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
1391 }
1392
1393 static void event_swap(union perf_event *event, bool sample_id_all)
1394 {
1395         perf_event__swap_op swap;
1396
1397         swap = perf_event__swap_ops[event->header.type];
1398         if (swap)
1399                 swap(event, sample_id_all);
1400 }
1401
1402 int perf_session__peek_event(struct perf_session *session, off_t file_offset,
1403                              void *buf, size_t buf_sz,
1404                              union perf_event **event_ptr,
1405                              struct perf_sample *sample)
1406 {
1407         union perf_event *event;
1408         size_t hdr_sz, rest;
1409         int fd;
1410
1411         if (session->one_mmap && !session->header.needs_swap) {
1412                 event = file_offset - session->one_mmap_offset +
1413                         session->one_mmap_addr;
1414                 goto out_parse_sample;
1415         }
1416
1417         if (perf_data_file__is_pipe(session->file))
1418                 return -1;
1419
1420         fd = perf_data_file__fd(session->file);
1421         hdr_sz = sizeof(struct perf_event_header);
1422
1423         if (buf_sz < hdr_sz)
1424                 return -1;
1425
1426         if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
1427             readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
1428                 return -1;
1429
1430         event = (union perf_event *)buf;
1431
1432         if (session->header.needs_swap)
1433                 perf_event_header__bswap(&event->header);
1434
1435         if (event->header.size < hdr_sz || event->header.size > buf_sz)
1436                 return -1;
1437
1438         rest = event->header.size - hdr_sz;
1439
1440         if (readn(fd, buf, rest) != (ssize_t)rest)
1441                 return -1;
1442
1443         if (session->header.needs_swap)
1444                 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1445
1446 out_parse_sample:
1447
1448         if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
1449             perf_evlist__parse_sample(session->evlist, event, sample))
1450                 return -1;
1451
1452         *event_ptr = event;
1453
1454         return 0;
1455 }
1456
1457 static s64 perf_session__process_event(struct perf_session *session,
1458                                        union perf_event *event, u64 file_offset)
1459 {
1460         struct perf_evlist *evlist = session->evlist;
1461         struct perf_tool *tool = session->tool;
1462         struct perf_sample sample;
1463         int ret;
1464
1465         if (session->header.needs_swap)
1466                 event_swap(event, perf_evlist__sample_id_all(evlist));
1467
1468         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1469                 return -EINVAL;
1470
1471         events_stats__inc(&evlist->stats, event->header.type);
1472
1473         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1474                 return perf_session__process_user_event(session, event, file_offset);
1475
1476         /*
1477          * For all kernel events we get the sample data
1478          */
1479         ret = perf_evlist__parse_sample(evlist, event, &sample);
1480         if (ret)
1481                 return ret;
1482
1483         if (tool->ordered_events) {
1484                 ret = perf_session__queue_event(session, event, &sample, file_offset);
1485                 if (ret != -ETIME)
1486                         return ret;
1487         }
1488
1489         return perf_session__deliver_event(session, event, &sample, tool,
1490                                            file_offset);
1491 }
1492
1493 void perf_event_header__bswap(struct perf_event_header *hdr)
1494 {
1495         hdr->type = bswap_32(hdr->type);
1496         hdr->misc = bswap_16(hdr->misc);
1497         hdr->size = bswap_16(hdr->size);
1498 }
1499
1500 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1501 {
1502         return machine__findnew_thread(&session->machines.host, -1, pid);
1503 }
1504
1505 int perf_session__register_idle_thread(struct perf_session *session)
1506 {
1507         struct thread *thread;
1508         int err = 0;
1509
1510         thread = machine__findnew_thread(&session->machines.host, 0, 0);
1511         if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1512                 pr_err("problem inserting idle task.\n");
1513                 err = -1;
1514         }
1515
1516         if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
1517                 pr_err("problem inserting idle task.\n");
1518                 err = -1;
1519         }
1520
1521         /* machine__findnew_thread() got the thread, so put it */
1522         thread__put(thread);
1523         return err;
1524 }
1525
1526 static void
1527 perf_session__warn_order(const struct perf_session *session)
1528 {
1529         const struct ordered_events *oe = &session->ordered_events;
1530         struct perf_evsel *evsel;
1531         bool should_warn = true;
1532
1533         evlist__for_each_entry(session->evlist, evsel) {
1534                 if (evsel->attr.write_backward)
1535                         should_warn = false;
1536         }
1537
1538         if (!should_warn)
1539                 return;
1540         if (oe->nr_unordered_events != 0)
1541                 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
1542 }
1543
1544 static void perf_session__warn_about_errors(const struct perf_session *session)
1545 {
1546         const struct events_stats *stats = &session->evlist->stats;
1547
1548         if (session->tool->lost == perf_event__process_lost &&
1549             stats->nr_events[PERF_RECORD_LOST] != 0) {
1550                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1551                             "Check IO/CPU overload!\n\n",
1552                             stats->nr_events[0],
1553                             stats->nr_events[PERF_RECORD_LOST]);
1554         }
1555
1556         if (session->tool->lost_samples == perf_event__process_lost_samples) {
1557                 double drop_rate;
1558
1559                 drop_rate = (double)stats->total_lost_samples /
1560                             (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
1561                 if (drop_rate > 0.05) {
1562                         ui__warning("Processed %" PRIu64 " samples and lost %3.2f%% samples!\n\n",
1563                                     stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
1564                                     drop_rate * 100.0);
1565                 }
1566         }
1567
1568         if (session->tool->aux == perf_event__process_aux &&
1569             stats->total_aux_lost != 0) {
1570                 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
1571                             stats->total_aux_lost,
1572                             stats->nr_events[PERF_RECORD_AUX]);
1573         }
1574
1575         if (session->tool->aux == perf_event__process_aux &&
1576             stats->total_aux_partial != 0) {
1577                 bool vmm_exclusive = false;
1578
1579                 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
1580                                        &vmm_exclusive);
1581
1582                 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
1583                             "Are you running a KVM guest in the background?%s\n\n",
1584                             stats->total_aux_partial,
1585                             stats->nr_events[PERF_RECORD_AUX],
1586                             vmm_exclusive ?
1587                             "\nReloading kvm_intel module with vmm_exclusive=0\n"
1588                             "will reduce the gaps to only guest's timeslices." :
1589                             "");
1590         }
1591
1592         if (stats->nr_unknown_events != 0) {
1593                 ui__warning("Found %u unknown events!\n\n"
1594                             "Is this an older tool processing a perf.data "
1595                             "file generated by a more recent tool?\n\n"
1596                             "If that is not the case, consider "
1597                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1598                             stats->nr_unknown_events);
1599         }
1600
1601         if (stats->nr_unknown_id != 0) {
1602                 ui__warning("%u samples with id not present in the header\n",
1603                             stats->nr_unknown_id);
1604         }
1605
1606         if (stats->nr_invalid_chains != 0) {
1607                 ui__warning("Found invalid callchains!\n\n"
1608                             "%u out of %u events were discarded for this reason.\n\n"
1609                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1610                             stats->nr_invalid_chains,
1611                             stats->nr_events[PERF_RECORD_SAMPLE]);
1612         }
1613
1614         if (stats->nr_unprocessable_samples != 0) {
1615                 ui__warning("%u unprocessable samples recorded.\n"
1616                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1617                             stats->nr_unprocessable_samples);
1618         }
1619
1620         perf_session__warn_order(session);
1621
1622         events_stats__auxtrace_error_warn(stats);
1623
1624         if (stats->nr_proc_map_timeout != 0) {
1625                 ui__warning("%d map information files for pre-existing threads were\n"
1626                             "not processed, if there are samples for addresses they\n"
1627                             "will not be resolved, you may find out which are these\n"
1628                             "threads by running with -v and redirecting the output\n"
1629                             "to a file.\n"
1630                             "The time limit to process proc map is too short?\n"
1631                             "Increase it by --proc-map-timeout\n",
1632                             stats->nr_proc_map_timeout);
1633         }
1634 }
1635
1636 static int perf_session__flush_thread_stack(struct thread *thread,
1637                                             void *p __maybe_unused)
1638 {
1639         return thread_stack__flush(thread);
1640 }
1641
1642 static int perf_session__flush_thread_stacks(struct perf_session *session)
1643 {
1644         return machines__for_each_thread(&session->machines,
1645                                          perf_session__flush_thread_stack,
1646                                          NULL);
1647 }
1648
1649 volatile int session_done;
1650
1651 static int __perf_session__process_pipe_events(struct perf_session *session)
1652 {
1653         struct ordered_events *oe = &session->ordered_events;
1654         struct perf_tool *tool = session->tool;
1655         int fd = perf_data_file__fd(session->file);
1656         union perf_event *event;
1657         uint32_t size, cur_size = 0;
1658         void *buf = NULL;
1659         s64 skip = 0;
1660         u64 head;
1661         ssize_t err;
1662         void *p;
1663
1664         perf_tool__fill_defaults(tool);
1665
1666         head = 0;
1667         cur_size = sizeof(union perf_event);
1668
1669         buf = malloc(cur_size);
1670         if (!buf)
1671                 return -errno;
1672         ordered_events__set_copy_on_queue(oe, true);
1673 more:
1674         event = buf;
1675         err = readn(fd, event, sizeof(struct perf_event_header));
1676         if (err <= 0) {
1677                 if (err == 0)
1678                         goto done;
1679
1680                 pr_err("failed to read event header\n");
1681                 goto out_err;
1682         }
1683
1684         if (session->header.needs_swap)
1685                 perf_event_header__bswap(&event->header);
1686
1687         size = event->header.size;
1688         if (size < sizeof(struct perf_event_header)) {
1689                 pr_err("bad event header size\n");
1690                 goto out_err;
1691         }
1692
1693         if (size > cur_size) {
1694                 void *new = realloc(buf, size);
1695                 if (!new) {
1696                         pr_err("failed to allocate memory to read event\n");
1697                         goto out_err;
1698                 }
1699                 buf = new;
1700                 cur_size = size;
1701                 event = buf;
1702         }
1703         p = event;
1704         p += sizeof(struct perf_event_header);
1705
1706         if (size - sizeof(struct perf_event_header)) {
1707                 err = readn(fd, p, size - sizeof(struct perf_event_header));
1708                 if (err <= 0) {
1709                         if (err == 0) {
1710                                 pr_err("unexpected end of event stream\n");
1711                                 goto done;
1712                         }
1713
1714                         pr_err("failed to read event data\n");
1715                         goto out_err;
1716                 }
1717         }
1718
1719         if ((skip = perf_session__process_event(session, event, head)) < 0) {
1720                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1721                        head, event->header.size, event->header.type);
1722                 err = -EINVAL;
1723                 goto out_err;
1724         }
1725
1726         head += size;
1727
1728         if (skip > 0)
1729                 head += skip;
1730
1731         if (!session_done())
1732                 goto more;
1733 done:
1734         /* do the final flush for ordered samples */
1735         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1736         if (err)
1737                 goto out_err;
1738         err = auxtrace__flush_events(session, tool);
1739         if (err)
1740                 goto out_err;
1741         err = perf_session__flush_thread_stacks(session);
1742 out_err:
1743         free(buf);
1744         perf_session__warn_about_errors(session);
1745         ordered_events__free(&session->ordered_events);
1746         auxtrace__free_events(session);
1747         return err;
1748 }
1749
1750 static union perf_event *
1751 fetch_mmaped_event(struct perf_session *session,
1752                    u64 head, size_t mmap_size, char *buf)
1753 {
1754         union perf_event *event;
1755
1756         /*
1757          * Ensure we have enough space remaining to read
1758          * the size of the event in the headers.
1759          */
1760         if (head + sizeof(event->header) > mmap_size)
1761                 return NULL;
1762
1763         event = (union perf_event *)(buf + head);
1764
1765         if (session->header.needs_swap)
1766                 perf_event_header__bswap(&event->header);
1767
1768         if (head + event->header.size > mmap_size) {
1769                 /* We're not fetching the event so swap back again */
1770                 if (session->header.needs_swap)
1771                         perf_event_header__bswap(&event->header);
1772                 return NULL;
1773         }
1774
1775         return event;
1776 }
1777
1778 /*
1779  * On 64bit we can mmap the data file in one go. No need for tiny mmap
1780  * slices. On 32bit we use 32MB.
1781  */
1782 #if BITS_PER_LONG == 64
1783 #define MMAP_SIZE ULLONG_MAX
1784 #define NUM_MMAPS 1
1785 #else
1786 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1787 #define NUM_MMAPS 128
1788 #endif
1789
1790 static int __perf_session__process_events(struct perf_session *session,
1791                                           u64 data_offset, u64 data_size,
1792                                           u64 file_size)
1793 {
1794         struct ordered_events *oe = &session->ordered_events;
1795         struct perf_tool *tool = session->tool;
1796         int fd = perf_data_file__fd(session->file);
1797         u64 head, page_offset, file_offset, file_pos, size;
1798         int err, mmap_prot, mmap_flags, map_idx = 0;
1799         size_t  mmap_size;
1800         char *buf, *mmaps[NUM_MMAPS];
1801         union perf_event *event;
1802         struct ui_progress prog;
1803         s64 skip;
1804
1805         perf_tool__fill_defaults(tool);
1806
1807         page_offset = page_size * (data_offset / page_size);
1808         file_offset = page_offset;
1809         head = data_offset - page_offset;
1810
1811         if (data_size == 0)
1812                 goto out;
1813
1814         if (data_offset + data_size < file_size)
1815                 file_size = data_offset + data_size;
1816
1817         ui_progress__init(&prog, file_size, "Processing events...");
1818
1819         mmap_size = MMAP_SIZE;
1820         if (mmap_size > file_size) {
1821                 mmap_size = file_size;
1822                 session->one_mmap = true;
1823         }
1824
1825         memset(mmaps, 0, sizeof(mmaps));
1826
1827         mmap_prot  = PROT_READ;
1828         mmap_flags = MAP_SHARED;
1829
1830         if (session->header.needs_swap) {
1831                 mmap_prot  |= PROT_WRITE;
1832                 mmap_flags = MAP_PRIVATE;
1833         }
1834 remap:
1835         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1836                    file_offset);
1837         if (buf == MAP_FAILED) {
1838                 pr_err("failed to mmap file\n");
1839                 err = -errno;
1840                 goto out_err;
1841         }
1842         mmaps[map_idx] = buf;
1843         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1844         file_pos = file_offset + head;
1845         if (session->one_mmap) {
1846                 session->one_mmap_addr = buf;
1847                 session->one_mmap_offset = file_offset;
1848         }
1849
1850 more:
1851         event = fetch_mmaped_event(session, head, mmap_size, buf);
1852         if (!event) {
1853                 if (mmaps[map_idx]) {
1854                         munmap(mmaps[map_idx], mmap_size);
1855                         mmaps[map_idx] = NULL;
1856                 }
1857
1858                 page_offset = page_size * (head / page_size);
1859                 file_offset += page_offset;
1860                 head -= page_offset;
1861                 goto remap;
1862         }
1863
1864         size = event->header.size;
1865
1866         if (size < sizeof(struct perf_event_header) ||
1867             (skip = perf_session__process_event(session, event, file_pos)) < 0) {
1868                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1869                        file_offset + head, event->header.size,
1870                        event->header.type);
1871                 err = -EINVAL;
1872                 goto out_err;
1873         }
1874
1875         if (skip)
1876                 size += skip;
1877
1878         head += size;
1879         file_pos += size;
1880
1881         ui_progress__update(&prog, size);
1882
1883         if (session_done())
1884                 goto out;
1885
1886         if (file_pos < file_size)
1887                 goto more;
1888
1889 out:
1890         /* do the final flush for ordered samples */
1891         err = ordered_events__flush(oe, OE_FLUSH__FINAL);
1892         if (err)
1893                 goto out_err;
1894         err = auxtrace__flush_events(session, tool);
1895         if (err)
1896                 goto out_err;
1897         err = perf_session__flush_thread_stacks(session);
1898 out_err:
1899         ui_progress__finish();
1900         perf_session__warn_about_errors(session);
1901         /*
1902          * We may switching perf.data output, make ordered_events
1903          * reusable.
1904          */
1905         ordered_events__reinit(&session->ordered_events);
1906         auxtrace__free_events(session);
1907         session->one_mmap = false;
1908         return err;
1909 }
1910
1911 int perf_session__process_events(struct perf_session *session)
1912 {
1913         u64 size = perf_data_file__size(session->file);
1914         int err;
1915
1916         if (perf_session__register_idle_thread(session) < 0)
1917                 return -ENOMEM;
1918
1919         if (!perf_data_file__is_pipe(session->file))
1920                 err = __perf_session__process_events(session,
1921                                                      session->header.data_offset,
1922                                                      session->header.data_size, size);
1923         else
1924                 err = __perf_session__process_pipe_events(session);
1925
1926         return err;
1927 }
1928
1929 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1930 {
1931         struct perf_evsel *evsel;
1932
1933         evlist__for_each_entry(session->evlist, evsel) {
1934                 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1935                         return true;
1936         }
1937
1938         pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1939         return false;
1940 }
1941
1942 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1943                                      const char *symbol_name, u64 addr)
1944 {
1945         char *bracket;
1946         int i;
1947         struct ref_reloc_sym *ref;
1948
1949         ref = zalloc(sizeof(struct ref_reloc_sym));
1950         if (ref == NULL)
1951                 return -ENOMEM;
1952
1953         ref->name = strdup(symbol_name);
1954         if (ref->name == NULL) {
1955                 free(ref);
1956                 return -ENOMEM;
1957         }
1958
1959         bracket = strchr(ref->name, ']');
1960         if (bracket)
1961                 *bracket = '\0';
1962
1963         ref->addr = addr;
1964
1965         for (i = 0; i < MAP__NR_TYPES; ++i) {
1966                 struct kmap *kmap = map__kmap(maps[i]);
1967
1968                 if (!kmap)
1969                         continue;
1970                 kmap->ref_reloc_sym = ref;
1971         }
1972
1973         return 0;
1974 }
1975
1976 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1977 {
1978         return machines__fprintf_dsos(&session->machines, fp);
1979 }
1980
1981 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1982                                           bool (skip)(struct dso *dso, int parm), int parm)
1983 {
1984         return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1985 }
1986
1987 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1988 {
1989         size_t ret;
1990         const char *msg = "";
1991
1992         if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
1993                 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
1994
1995         ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
1996
1997         ret += events_stats__fprintf(&session->evlist->stats, fp);
1998         return ret;
1999 }
2000
2001 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
2002 {
2003         /*
2004          * FIXME: Here we have to actually print all the machines in this
2005          * session, not just the host...
2006          */
2007         return machine__fprintf(&session->machines.host, fp);
2008 }
2009
2010 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
2011                                               unsigned int type)
2012 {
2013         struct perf_evsel *pos;
2014
2015         evlist__for_each_entry(session->evlist, pos) {
2016                 if (pos->attr.type == type)
2017                         return pos;
2018         }
2019         return NULL;
2020 }
2021
2022 int perf_session__cpu_bitmap(struct perf_session *session,
2023                              const char *cpu_list, unsigned long *cpu_bitmap)
2024 {
2025         int i, err = -1;
2026         struct cpu_map *map;
2027
2028         for (i = 0; i < PERF_TYPE_MAX; ++i) {
2029                 struct perf_evsel *evsel;
2030
2031                 evsel = perf_session__find_first_evtype(session, i);
2032                 if (!evsel)
2033                         continue;
2034
2035                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
2036                         pr_err("File does not contain CPU events. "
2037                                "Remove -c option to proceed.\n");
2038                         return -1;
2039                 }
2040         }
2041
2042         map = cpu_map__new(cpu_list);
2043         if (map == NULL) {
2044                 pr_err("Invalid cpu_list\n");
2045                 return -1;
2046         }
2047
2048         for (i = 0; i < map->nr; i++) {
2049                 int cpu = map->map[i];
2050
2051                 if (cpu >= MAX_NR_CPUS) {
2052                         pr_err("Requested CPU %d too large. "
2053                                "Consider raising MAX_NR_CPUS\n", cpu);
2054                         goto out_delete_map;
2055                 }
2056
2057                 set_bit(cpu, cpu_bitmap);
2058         }
2059
2060         err = 0;
2061
2062 out_delete_map:
2063         cpu_map__put(map);
2064         return err;
2065 }
2066
2067 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
2068                                 bool full)
2069 {
2070         if (session == NULL || fp == NULL)
2071                 return;
2072
2073         fprintf(fp, "# ========\n");
2074         perf_header__fprintf_info(session, fp, full);
2075         fprintf(fp, "# ========\n#\n");
2076 }
2077
2078
2079 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
2080                                              const struct perf_evsel_str_handler *assocs,
2081                                              size_t nr_assocs)
2082 {
2083         struct perf_evsel *evsel;
2084         size_t i;
2085         int err;
2086
2087         for (i = 0; i < nr_assocs; i++) {
2088                 /*
2089                  * Adding a handler for an event not in the session,
2090                  * just ignore it.
2091                  */
2092                 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
2093                 if (evsel == NULL)
2094                         continue;
2095
2096                 err = -EEXIST;
2097                 if (evsel->handler != NULL)
2098                         goto out;
2099                 evsel->handler = assocs[i].handler;
2100         }
2101
2102         err = 0;
2103 out:
2104         return err;
2105 }
2106
2107 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
2108                                  union perf_event *event,
2109                                  struct perf_session *session)
2110 {
2111         struct perf_evlist *evlist = session->evlist;
2112         struct id_index_event *ie = &event->id_index;
2113         size_t i, nr, max_nr;
2114
2115         max_nr = (ie->header.size - sizeof(struct id_index_event)) /
2116                  sizeof(struct id_index_entry);
2117         nr = ie->nr;
2118         if (nr > max_nr)
2119                 return -EINVAL;
2120
2121         if (dump_trace)
2122                 fprintf(stdout, " nr: %zu\n", nr);
2123
2124         for (i = 0; i < nr; i++) {
2125                 struct id_index_entry *e = &ie->entries[i];
2126                 struct perf_sample_id *sid;
2127
2128                 if (dump_trace) {
2129                         fprintf(stdout, " ... id: %"PRIu64, e->id);
2130                         fprintf(stdout, "  idx: %"PRIu64, e->idx);
2131                         fprintf(stdout, "  cpu: %"PRId64, e->cpu);
2132                         fprintf(stdout, "  tid: %"PRId64"\n", e->tid);
2133                 }
2134
2135                 sid = perf_evlist__id2sid(evlist, e->id);
2136                 if (!sid)
2137                         return -ENOENT;
2138                 sid->idx = e->idx;
2139                 sid->cpu = e->cpu;
2140                 sid->tid = e->tid;
2141         }
2142         return 0;
2143 }
2144
2145 int perf_event__synthesize_id_index(struct perf_tool *tool,
2146                                     perf_event__handler_t process,
2147                                     struct perf_evlist *evlist,
2148                                     struct machine *machine)
2149 {
2150         union perf_event *ev;
2151         struct perf_evsel *evsel;
2152         size_t nr = 0, i = 0, sz, max_nr, n;
2153         int err;
2154
2155         pr_debug2("Synthesizing id index\n");
2156
2157         max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
2158                  sizeof(struct id_index_entry);
2159
2160         evlist__for_each_entry(evlist, evsel)
2161                 nr += evsel->ids;
2162
2163         n = nr > max_nr ? max_nr : nr;
2164         sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
2165         ev = zalloc(sz);
2166         if (!ev)
2167                 return -ENOMEM;
2168
2169         ev->id_index.header.type = PERF_RECORD_ID_INDEX;
2170         ev->id_index.header.size = sz;
2171         ev->id_index.nr = n;
2172
2173         evlist__for_each_entry(evlist, evsel) {
2174                 u32 j;
2175
2176                 for (j = 0; j < evsel->ids; j++) {
2177                         struct id_index_entry *e;
2178                         struct perf_sample_id *sid;
2179
2180                         if (i >= n) {
2181                                 err = process(tool, ev, NULL, machine);
2182                                 if (err)
2183                                         goto out_err;
2184                                 nr -= n;
2185                                 i = 0;
2186                         }
2187
2188                         e = &ev->id_index.entries[i++];
2189
2190                         e->id = evsel->id[j];
2191
2192                         sid = perf_evlist__id2sid(evlist, e->id);
2193                         if (!sid) {
2194                                 free(ev);
2195                                 return -ENOENT;
2196                         }
2197
2198                         e->idx = sid->idx;
2199                         e->cpu = sid->cpu;
2200                         e->tid = sid->tid;
2201                 }
2202         }
2203
2204         sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
2205         ev->id_index.header.size = sz;
2206         ev->id_index.nr = nr;
2207
2208         err = process(tool, ev, NULL, machine);
2209 out_err:
2210         free(ev);
2211
2212         return err;
2213 }