Pileus Git - ~andy/linux/blob - tools/perf/util/session.c

   1 #define _FILE_OFFSET_BITS 64
   2
   3 #include <linux/kernel.h>
   4
   5 #include <byteswap.h>
   6 #include <unistd.h>
   7 #include <sys/types.h>
   8 #include <sys/mman.h>
   9
  10 #include "evlist.h"
  11 #include "evsel.h"
  12 #include "session.h"
  13 #include "tool.h"
  14 #include "sort.h"
  15 #include "util.h"
  16 #include "cpumap.h"
  17
  18 static int perf_session__open(struct perf_session *self, bool force)
  19 {
  20         struct stat input_stat;
  21
  22         if (!strcmp(self->filename, "-")) {
  23                 self->fd_pipe = true;
  24                 self->fd = STDIN_FILENO;
  25
  26                 if (perf_session__read_header(self, self->fd) < 0)
  27                         pr_err("incompatible file format (rerun with -v to learn more)");
  28
  29                 return 0;
  30         }
  31
  32         self->fd = open(self->filename, O_RDONLY);
  33         if (self->fd < 0) {
  34                 int err = errno;
  35
  36                 pr_err("failed to open %s: %s", self->filename, strerror(err));
  37                 if (err == ENOENT && !strcmp(self->filename, "perf.data"))
  38                         pr_err("  (try 'perf record' first)");
  39                 pr_err("\n");
  40                 return -errno;
  41         }
  42
  43         if (fstat(self->fd, &input_stat) < 0)
  44                 goto out_close;
  45
  46         if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
  47                 pr_err("file %s not owned by current user or root\n",
  48                        self->filename);
  49                 goto out_close;
  50         }
  51
  52         if (!input_stat.st_size) {
  53                 pr_info("zero-sized file (%s), nothing to do!\n",
  54                         self->filename);
  55                 goto out_close;
  56         }
  57
  58         if (perf_session__read_header(self, self->fd) < 0) {
  59                 pr_err("incompatible file format (rerun with -v to learn more)");
  60                 goto out_close;
  61         }
  62
  63         if (!perf_evlist__valid_sample_type(self->evlist)) {
  64                 pr_err("non matching sample_type");
  65                 goto out_close;
  66         }
  67
  68         if (!perf_evlist__valid_sample_id_all(self->evlist)) {
  69                 pr_err("non matching sample_id_all");
  70                 goto out_close;
  71         }
  72
  73         self->size = input_stat.st_size;
  74         return 0;
  75
  76 out_close:
  77         close(self->fd);
  78         self->fd = -1;
  79         return -1;
  80 }
  81
  82 void perf_session__update_sample_type(struct perf_session *self)
  83 {
  84         self->sample_type = perf_evlist__sample_type(self->evlist);
  85         self->sample_size = __perf_evsel__sample_size(self->sample_type);
  86         self->sample_id_all = perf_evlist__sample_id_all(self->evlist);
  87         self->id_hdr_size = perf_evlist__id_hdr_size(self->evlist);
  88         self->host_machine.id_hdr_size = self->id_hdr_size;
  89 }
  90
  91 int perf_session__create_kernel_maps(struct perf_session *self)
  92 {
  93         int ret = machine__create_kernel_maps(&self->host_machine);
  94
  95         if (ret >= 0)
  96                 ret = machines__create_guest_kernel_maps(&self->machines);
  97         return ret;
  98 }
  99
 100 static void perf_session__destroy_kernel_maps(struct perf_session *self)
 101 {
 102         machine__destroy_kernel_maps(&self->host_machine);
 103         machines__destroy_guest_kernel_maps(&self->machines);
 104 }
 105
 106 struct perf_session *perf_session__new(const char *filename, int mode,
 107                                        bool force, bool repipe,
 108                                        struct perf_tool *tool)
 109 {
 110         struct perf_session *self;
 111         struct stat st;
 112         size_t len;
 113
 114         if (!filename || !strlen(filename)) {
 115                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
 116                         filename = "-";
 117                 else
 118                         filename = "perf.data";
 119         }
 120
 121         len = strlen(filename);
 122         self = zalloc(sizeof(*self) + len);
 123
 124         if (self == NULL)
 125                 goto out;
 126
 127         memcpy(self->filename, filename, len);
 128         /*
 129          * On 64bit we can mmap the data file in one go. No need for tiny mmap
 130          * slices. On 32bit we use 32MB.
 131          */
 132 #if BITS_PER_LONG == 64
 133         self->mmap_window = ULLONG_MAX;
 134 #else
 135         self->mmap_window = 32 * 1024 * 1024ULL;
 136 #endif
 137         self->machines = RB_ROOT;
 138         self->repipe = repipe;
 139         INIT_LIST_HEAD(&self->ordered_samples.samples);
 140         INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
 141         INIT_LIST_HEAD(&self->ordered_samples.to_free);
 142         machine__init(&self->host_machine, "", HOST_KERNEL_ID);
 143         hists__init(&self->hists);
 144
 145         if (mode == O_RDONLY) {
 146                 if (perf_session__open(self, force) < 0)
 147                         goto out_delete;
 148                 perf_session__update_sample_type(self);
 149         } else if (mode == O_WRONLY) {
 150                 /*
 151                  * In O_RDONLY mode this will be performed when reading the
 152                  * kernel MMAP event, in perf_event__process_mmap().
 153                  */
 154                 if (perf_session__create_kernel_maps(self) < 0)
 155                         goto out_delete;
 156         }
 157
 158         if (tool && tool->ordering_requires_timestamps &&
 159             tool->ordered_samples && !self->sample_id_all) {
 160                 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
 161                 tool->ordered_samples = false;
 162         }
 163
 164 out:
 165         return self;
 166 out_delete:
 167         perf_session__delete(self);
 168         return NULL;
 169 }
 170
 171 static void machine__delete_dead_threads(struct machine *machine)
 172 {
 173         struct thread *n, *t;
 174
 175         list_for_each_entry_safe(t, n, &machine->dead_threads, node) {
 176                 list_del(&t->node);
 177                 thread__delete(t);
 178         }
 179 }
 180
 181 static void perf_session__delete_dead_threads(struct perf_session *session)
 182 {
 183         machine__delete_dead_threads(&session->host_machine);
 184 }
 185
 186 static void machine__delete_threads(struct machine *self)
 187 {
 188         struct rb_node *nd = rb_first(&self->threads);
 189
 190         while (nd) {
 191                 struct thread *t = rb_entry(nd, struct thread, rb_node);
 192
 193                 rb_erase(&t->rb_node, &self->threads);
 194                 nd = rb_next(nd);
 195                 thread__delete(t);
 196         }
 197 }
 198
 199 static void perf_session__delete_threads(struct perf_session *session)
 200 {
 201         machine__delete_threads(&session->host_machine);
 202 }
 203
 204 void perf_session__delete(struct perf_session *self)
 205 {
 206         perf_session__destroy_kernel_maps(self);
 207         perf_session__delete_dead_threads(self);
 208         perf_session__delete_threads(self);
 209         machine__exit(&self->host_machine);
 210         close(self->fd);
 211         free(self);
 212 }
 213
 214 void machine__remove_thread(struct machine *self, struct thread *th)
 215 {
 216         self->last_match = NULL;
 217         rb_erase(&th->rb_node, &self->threads);
 218         /*
 219          * We may have references to this thread, for instance in some hist_entry
 220          * instances, so just move them to a separate list.
 221          */
 222         list_add_tail(&th->node, &self->dead_threads);
 223 }
 224
 225 static bool symbol__match_parent_regex(struct symbol *sym)
 226 {
 227         if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
 228                 return 1;
 229
 230         return 0;
 231 }
 232
 233 static const u8 cpumodes[] = {
 234         PERF_RECORD_MISC_USER,
 235         PERF_RECORD_MISC_KERNEL,
 236         PERF_RECORD_MISC_GUEST_USER,
 237         PERF_RECORD_MISC_GUEST_KERNEL
 238 };
 239 #define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
 240
 241 static void ip__resolve_ams(struct machine *self, struct thread *thread,
 242                             struct addr_map_symbol *ams,
 243                             u64 ip)
 244 {
 245         struct addr_location al;
 246         size_t i;
 247         u8 m;
 248
 249         memset(&al, 0, sizeof(al));
 250
 251         for (i = 0; i < NCPUMODES; i++) {
 252                 m = cpumodes[i];
 253                 /*
 254                  * We cannot use the header.misc hint to determine whether a
 255                  * branch stack address is user, kernel, guest, hypervisor.
 256                  * Branches may straddle the kernel/user/hypervisor boundaries.
 257                  * Thus, we have to try consecutively until we find a match
 258                  * or else, the symbol is unknown
 259                  */
 260                 thread__find_addr_location(thread, self, m, MAP__FUNCTION,
 261                                 ip, &al, NULL);
 262                 if (al.sym)
 263                         goto found;
 264         }
 265 found:
 266         ams->addr = ip;
 267         ams->al_addr = al.addr;
 268         ams->sym = al.sym;
 269         ams->map = al.map;
 270 }
 271
 272 struct branch_info *machine__resolve_bstack(struct machine *self,
 273                                             struct thread *thr,
 274                                             struct branch_stack *bs)
 275 {
 276         struct branch_info *bi;
 277         unsigned int i;
 278
 279         bi = calloc(bs->nr, sizeof(struct branch_info));
 280         if (!bi)
 281                 return NULL;
 282
 283         for (i = 0; i < bs->nr; i++) {
 284                 ip__resolve_ams(self, thr, &bi[i].to, bs->entries[i].to);
 285                 ip__resolve_ams(self, thr, &bi[i].from, bs->entries[i].from);
 286                 bi[i].flags = bs->entries[i].flags;
 287         }
 288         return bi;
 289 }
 290
 291 int machine__resolve_callchain(struct machine *self, struct perf_evsel *evsel,
 292                                struct thread *thread,
 293                                struct ip_callchain *chain,
 294                                struct symbol **parent)
 295 {
 296         u8 cpumode = PERF_RECORD_MISC_USER;
 297         unsigned int i;
 298         int err;
 299
 300         callchain_cursor_reset(&evsel->hists.callchain_cursor);
 301
 302         for (i = 0; i < chain->nr; i++) {
 303                 u64 ip;
 304                 struct addr_location al;
 305
 306                 if (callchain_param.order == ORDER_CALLEE)
 307                         ip = chain->ips[i];
 308                 else
 309                         ip = chain->ips[chain->nr - i - 1];
 310
 311                 if (ip >= PERF_CONTEXT_MAX) {
 312                         switch (ip) {
 313                         case PERF_CONTEXT_HV:
 314                                 cpumode = PERF_RECORD_MISC_HYPERVISOR;  break;
 315                         case PERF_CONTEXT_KERNEL:
 316                                 cpumode = PERF_RECORD_MISC_KERNEL;      break;
 317                         case PERF_CONTEXT_USER:
 318                                 cpumode = PERF_RECORD_MISC_USER;        break;
 319                         default:
 320                                 break;
 321                         }
 322                         continue;
 323                 }
 324
 325                 al.filtered = false;
 326                 thread__find_addr_location(thread, self, cpumode,
 327                                            MAP__FUNCTION, ip, &al, NULL);
 328                 if (al.sym != NULL) {
 329                         if (sort__has_parent && !*parent &&
 330                             symbol__match_parent_regex(al.sym))
 331                                 *parent = al.sym;
 332                         if (!symbol_conf.use_callchain)
 333                                 break;
 334                 }
 335
 336                 err = callchain_cursor_append(&evsel->hists.callchain_cursor,
 337                                               ip, al.map, al.sym);
 338                 if (err)
 339                         return err;
 340         }
 341
 342         return 0;
 343 }
 344
 345 static int process_event_synth_tracing_data_stub(union perf_event *event __used,
 346                                                  struct perf_session *session __used)
 347 {
 348         dump_printf(": unhandled!\n");
 349         return 0;
 350 }
 351
 352 static int process_event_synth_attr_stub(union perf_event *event __used,
 353                                          struct perf_evlist **pevlist __used)
 354 {
 355         dump_printf(": unhandled!\n");
 356         return 0;
 357 }
 358
 359 static int process_event_sample_stub(struct perf_tool *tool __used,
 360                                      union perf_event *event __used,
 361                                      struct perf_sample *sample __used,
 362                                      struct perf_evsel *evsel __used,
 363                                      struct machine *machine __used)
 364 {
 365         dump_printf(": unhandled!\n");
 366         return 0;
 367 }
 368
 369 static int process_event_stub(struct perf_tool *tool __used,
 370                               union perf_event *event __used,
 371                               struct perf_sample *sample __used,
 372                               struct machine *machine __used)
 373 {
 374         dump_printf(": unhandled!\n");
 375         return 0;
 376 }
 377
 378 static int process_finished_round_stub(struct perf_tool *tool __used,
 379                                        union perf_event *event __used,
 380                                        struct perf_session *perf_session __used)
 381 {
 382         dump_printf(": unhandled!\n");
 383         return 0;
 384 }
 385
 386 static int process_event_type_stub(struct perf_tool *tool __used,
 387                                    union perf_event *event __used)
 388 {
 389         dump_printf(": unhandled!\n");
 390         return 0;
 391 }
 392
 393 static int process_finished_round(struct perf_tool *tool,
 394                                   union perf_event *event,
 395                                   struct perf_session *session);
 396
 397 static void perf_tool__fill_defaults(struct perf_tool *tool)
 398 {
 399         if (tool->sample == NULL)
 400                 tool->sample = process_event_sample_stub;
 401         if (tool->mmap == NULL)
 402                 tool->mmap = process_event_stub;
 403         if (tool->comm == NULL)
 404                 tool->comm = process_event_stub;
 405         if (tool->fork == NULL)
 406                 tool->fork = process_event_stub;
 407         if (tool->exit == NULL)
 408                 tool->exit = process_event_stub;
 409         if (tool->lost == NULL)
 410                 tool->lost = perf_event__process_lost;
 411         if (tool->read == NULL)
 412                 tool->read = process_event_sample_stub;
 413         if (tool->throttle == NULL)
 414                 tool->throttle = process_event_stub;
 415         if (tool->unthrottle == NULL)
 416                 tool->unthrottle = process_event_stub;
 417         if (tool->attr == NULL)
 418                 tool->attr = process_event_synth_attr_stub;
 419         if (tool->event_type == NULL)
 420                 tool->event_type = process_event_type_stub;
 421         if (tool->tracing_data == NULL)
 422                 tool->tracing_data = process_event_synth_tracing_data_stub;
 423         if (tool->build_id == NULL)
 424                 tool->build_id = process_finished_round_stub;
 425         if (tool->finished_round == NULL) {
 426                 if (tool->ordered_samples)
 427                         tool->finished_round = process_finished_round;
 428                 else
 429                         tool->finished_round = process_finished_round_stub;
 430         }
 431 }
 432
 433 void mem_bswap_64(void *src, int byte_size)
 434 {
 435         u64 *m = src;
 436
 437         while (byte_size > 0) {
 438                 *m = bswap_64(*m);
 439                 byte_size -= sizeof(u64);
 440                 ++m;
 441         }
 442 }
 443
 444 static void perf_event__all64_swap(union perf_event *event)
 445 {
 446         struct perf_event_header *hdr = &event->header;
 447         mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
 448 }
 449
 450 static void perf_event__comm_swap(union perf_event *event)
 451 {
 452         event->comm.pid = bswap_32(event->comm.pid);
 453         event->comm.tid = bswap_32(event->comm.tid);
 454 }
 455
 456 static void perf_event__mmap_swap(union perf_event *event)
 457 {
 458         event->mmap.pid   = bswap_32(event->mmap.pid);
 459         event->mmap.tid   = bswap_32(event->mmap.tid);
 460         event->mmap.start = bswap_64(event->mmap.start);
 461         event->mmap.len   = bswap_64(event->mmap.len);
 462         event->mmap.pgoff = bswap_64(event->mmap.pgoff);
 463 }
 464
 465 static void perf_event__task_swap(union perf_event *event)
 466 {
 467         event->fork.pid  = bswap_32(event->fork.pid);
 468         event->fork.tid  = bswap_32(event->fork.tid);
 469         event->fork.ppid = bswap_32(event->fork.ppid);
 470         event->fork.ptid = bswap_32(event->fork.ptid);
 471         event->fork.time = bswap_64(event->fork.time);
 472 }
 473
 474 static void perf_event__read_swap(union perf_event *event)
 475 {
 476         event->read.pid          = bswap_32(event->read.pid);
 477         event->read.tid          = bswap_32(event->read.tid);
 478         event->read.value        = bswap_64(event->read.value);
 479         event->read.time_enabled = bswap_64(event->read.time_enabled);
 480         event->read.time_running = bswap_64(event->read.time_running);
 481         event->read.id           = bswap_64(event->read.id);
 482 }
 483
 484 static u8 revbyte(u8 b)
 485 {
 486         int rev = (b >> 4) | ((b & 0xf) << 4);
 487         rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
 488         rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
 489         return (u8) rev;
 490 }
 491
 492 /*
 493  * XXX this is hack in attempt to carry flags bitfield
 494  * throught endian village. ABI says:
 495  *
 496  * Bit-fields are allocated from right to left (least to most significant)
 497  * on little-endian implementations and from left to right (most to least
 498  * significant) on big-endian implementations.
 499  *
 500  * The above seems to be byte specific, so we need to reverse each
 501  * byte of the bitfield. 'Internet' also says this might be implementation
 502  * specific and we probably need proper fix and carry perf_event_attr
 503  * bitfield flags in separate data file FEAT_ section. Thought this seems
 504  * to work for now.
 505  */
 506 static void swap_bitfield(u8 *p, unsigned len)
 507 {
 508         unsigned i;
 509
 510         for (i = 0; i < len; i++) {
 511                 *p = revbyte(*p);
 512                 p++;
 513         }
 514 }
 515
 516 /* exported for swapping attributes in file header */
 517 void perf_event__attr_swap(struct perf_event_attr *attr)
 518 {
 519         attr->type              = bswap_32(attr->type);
 520         attr->size              = bswap_32(attr->size);
 521         attr->config            = bswap_64(attr->config);
 522         attr->sample_period     = bswap_64(attr->sample_period);
 523         attr->sample_type       = bswap_64(attr->sample_type);
 524         attr->read_format       = bswap_64(attr->read_format);
 525         attr->wakeup_events     = bswap_32(attr->wakeup_events);
 526         attr->bp_type           = bswap_32(attr->bp_type);
 527         attr->bp_addr           = bswap_64(attr->bp_addr);
 528         attr->bp_len            = bswap_64(attr->bp_len);
 529
 530         swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
 531 }
 532
 533 static void perf_event__hdr_attr_swap(union perf_event *event)
 534 {
 535         size_t size;
 536
 537         perf_event__attr_swap(&event->attr.attr);
 538
 539         size = event->header.size;
 540         size -= (void *)&event->attr.id - (void *)event;
 541         mem_bswap_64(event->attr.id, size);
 542 }
 543
 544 static void perf_event__event_type_swap(union perf_event *event)
 545 {
 546         event->event_type.event_type.event_id =
 547                 bswap_64(event->event_type.event_type.event_id);
 548 }
 549
 550 static void perf_event__tracing_data_swap(union perf_event *event)
 551 {
 552         event->tracing_data.size = bswap_32(event->tracing_data.size);
 553 }
 554
 555 typedef void (*perf_event__swap_op)(union perf_event *event);
 556
 557 static perf_event__swap_op perf_event__swap_ops[] = {
 558         [PERF_RECORD_MMAP]                = perf_event__mmap_swap,
 559         [PERF_RECORD_COMM]                = perf_event__comm_swap,
 560         [PERF_RECORD_FORK]                = perf_event__task_swap,
 561         [PERF_RECORD_EXIT]                = perf_event__task_swap,
 562         [PERF_RECORD_LOST]                = perf_event__all64_swap,
 563         [PERF_RECORD_READ]                = perf_event__read_swap,
 564         [PERF_RECORD_SAMPLE]              = perf_event__all64_swap,
 565         [PERF_RECORD_HEADER_ATTR]         = perf_event__hdr_attr_swap,
 566         [PERF_RECORD_HEADER_EVENT_TYPE]   = perf_event__event_type_swap,
 567         [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
 568         [PERF_RECORD_HEADER_BUILD_ID]     = NULL,
 569         [PERF_RECORD_HEADER_MAX]          = NULL,
 570 };
 571
 572 struct sample_queue {
 573         u64                     timestamp;
 574         u64                     file_offset;
 575         union perf_event        *event;
 576         struct list_head        list;
 577 };
 578
 579 static void perf_session_free_sample_buffers(struct perf_session *session)
 580 {
 581         struct ordered_samples *os = &session->ordered_samples;
 582
 583         while (!list_empty(&os->to_free)) {
 584                 struct sample_queue *sq;
 585
 586                 sq = list_entry(os->to_free.next, struct sample_queue, list);
 587                 list_del(&sq->list);
 588                 free(sq);
 589         }
 590 }
 591
 592 static int perf_session_deliver_event(struct perf_session *session,
 593                                       union perf_event *event,
 594                                       struct perf_sample *sample,
 595                                       struct perf_tool *tool,
 596                                       u64 file_offset);
 597
 598 static void flush_sample_queue(struct perf_session *s,
 599                                struct perf_tool *tool)
 600 {
 601         struct ordered_samples *os = &s->ordered_samples;
 602         struct list_head *head = &os->samples;
 603         struct sample_queue *tmp, *iter;
 604         struct perf_sample sample;
 605         u64 limit = os->next_flush;
 606         u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
 607         unsigned idx = 0, progress_next = os->nr_samples / 16;
 608         int ret;
 609
 610         if (!tool->ordered_samples || !limit)
 611                 return;
 612
 613         list_for_each_entry_safe(iter, tmp, head, list) {
 614                 if (iter->timestamp > limit)
 615                         break;
 616
 617                 ret = perf_session__parse_sample(s, iter->event, &sample);
 618                 if (ret)
 619                         pr_err("Can't parse sample, err = %d\n", ret);
 620                 else
 621                         perf_session_deliver_event(s, iter->event, &sample, tool,
 622                                                    iter->file_offset);
 623
 624                 os->last_flush = iter->timestamp;
 625                 list_del(&iter->list);
 626                 list_add(&iter->list, &os->sample_cache);
 627                 if (++idx >= progress_next) {
 628                         progress_next += os->nr_samples / 16;
 629                         ui_progress__update(idx, os->nr_samples,
 630                                             "Processing time ordered events...");
 631                 }
 632         }
 633
 634         if (list_empty(head)) {
 635                 os->last_sample = NULL;
 636         } else if (last_ts <= limit) {
 637                 os->last_sample =
 638                         list_entry(head->prev, struct sample_queue, list);
 639         }
 640
 641         os->nr_samples = 0;
 642 }
 643
 644 /*
 645  * When perf record finishes a pass on every buffers, it records this pseudo
 646  * event.
 647  * We record the max timestamp t found in the pass n.
 648  * Assuming these timestamps are monotonic across cpus, we know that if
 649  * a buffer still has events with timestamps below t, they will be all
 650  * available and then read in the pass n + 1.
 651  * Hence when we start to read the pass n + 2, we can safely flush every
 652  * events with timestamps below t.
 653  *
 654  *    ============ PASS n =================
 655  *       CPU 0         |   CPU 1
 656  *                     |
 657  *    cnt1 timestamps  |   cnt2 timestamps
 658  *          1          |         2
 659  *          2          |         3
 660  *          -          |         4  <--- max recorded
 661  *
 662  *    ============ PASS n + 1 ==============
 663  *       CPU 0         |   CPU 1
 664  *                     |
 665  *    cnt1 timestamps  |   cnt2 timestamps
 666  *          3          |         5
 667  *          4          |         6
 668  *          5          |         7 <---- max recorded
 669  *
 670  *      Flush every events below timestamp 4
 671  *
 672  *    ============ PASS n + 2 ==============
 673  *       CPU 0         |   CPU 1
 674  *                     |
 675  *    cnt1 timestamps  |   cnt2 timestamps
 676  *          6          |         8
 677  *          7          |         9
 678  *          -          |         10
 679  *
 680  *      Flush every events below timestamp 7
 681  *      etc...
 682  */
 683 static int process_finished_round(struct perf_tool *tool,
 684                                   union perf_event *event __used,
 685                                   struct perf_session *session)
 686 {
 687         flush_sample_queue(session, tool);
 688         session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
 689
 690         return 0;
 691 }
 692
 693 /* The queue is ordered by time */
 694 static void __queue_event(struct sample_queue *new, struct perf_session *s)
 695 {
 696         struct ordered_samples *os = &s->ordered_samples;
 697         struct sample_queue *sample = os->last_sample;
 698         u64 timestamp = new->timestamp;
 699         struct list_head *p;
 700
 701         ++os->nr_samples;
 702         os->last_sample = new;
 703
 704         if (!sample) {
 705                 list_add(&new->list, &os->samples);
 706                 os->max_timestamp = timestamp;
 707                 return;
 708         }
 709
 710         /*
 711          * last_sample might point to some random place in the list as it's
 712          * the last queued event. We expect that the new event is close to
 713          * this.
 714          */
 715         if (sample->timestamp <= timestamp) {
 716                 while (sample->timestamp <= timestamp) {
 717                         p = sample->list.next;
 718                         if (p == &os->samples) {
 719                                 list_add_tail(&new->list, &os->samples);
 720                                 os->max_timestamp = timestamp;
 721                                 return;
 722                         }
 723                         sample = list_entry(p, struct sample_queue, list);
 724                 }
 725                 list_add_tail(&new->list, &sample->list);
 726         } else {
 727                 while (sample->timestamp > timestamp) {
 728                         p = sample->list.prev;
 729                         if (p == &os->samples) {
 730                                 list_add(&new->list, &os->samples);
 731                                 return;
 732                         }
 733                         sample = list_entry(p, struct sample_queue, list);
 734                 }
 735                 list_add(&new->list, &sample->list);
 736         }
 737 }
 738
 739 #define MAX_SAMPLE_BUFFER       (64 * 1024 / sizeof(struct sample_queue))
 740
 741 static int perf_session_queue_event(struct perf_session *s, union perf_event *event,
 742                                     struct perf_sample *sample, u64 file_offset)
 743 {
 744         struct ordered_samples *os = &s->ordered_samples;
 745         struct list_head *sc = &os->sample_cache;
 746         u64 timestamp = sample->time;
 747         struct sample_queue *new;
 748
 749         if (!timestamp || timestamp == ~0ULL)
 750                 return -ETIME;
 751
 752         if (timestamp < s->ordered_samples.last_flush) {
 753                 printf("Warning: Timestamp below last timeslice flush\n");
 754                 return -EINVAL;
 755         }
 756
 757         if (!list_empty(sc)) {
 758                 new = list_entry(sc->next, struct sample_queue, list);
 759                 list_del(&new->list);
 760         } else if (os->sample_buffer) {
 761                 new = os->sample_buffer + os->sample_buffer_idx;
 762                 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
 763                         os->sample_buffer = NULL;
 764         } else {
 765                 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
 766                 if (!os->sample_buffer)
 767                         return -ENOMEM;
 768                 list_add(&os->sample_buffer->list, &os->to_free);
 769                 os->sample_buffer_idx = 2;
 770                 new = os->sample_buffer + 1;
 771         }
 772
 773         new->timestamp = timestamp;
 774         new->file_offset = file_offset;
 775         new->event = event;
 776
 777         __queue_event(new, s);
 778
 779         return 0;
 780 }
 781
 782 static void callchain__printf(struct perf_sample *sample)
 783 {
 784         unsigned int i;
 785
 786         printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
 787
 788         for (i = 0; i < sample->callchain->nr; i++)
 789                 printf("..... %2d: %016" PRIx64 "\n",
 790                        i, sample->callchain->ips[i]);
 791 }
 792
 793 static void branch_stack__printf(struct perf_sample *sample)
 794 {
 795         uint64_t i;
 796
 797         printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
 798
 799         for (i = 0; i < sample->branch_stack->nr; i++)
 800                 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
 801                         i, sample->branch_stack->entries[i].from,
 802                         sample->branch_stack->entries[i].to);
 803 }
 804
 805 static void perf_session__print_tstamp(struct perf_session *session,
 806                                        union perf_event *event,
 807                                        struct perf_sample *sample)
 808 {
 809         if (event->header.type != PERF_RECORD_SAMPLE &&
 810             !session->sample_id_all) {
 811                 fputs("-1 -1 ", stdout);
 812                 return;
 813         }
 814
 815         if ((session->sample_type & PERF_SAMPLE_CPU))
 816                 printf("%u ", sample->cpu);
 817
 818         if (session->sample_type & PERF_SAMPLE_TIME)
 819                 printf("%" PRIu64 " ", sample->time);
 820 }
 821
 822 static void dump_event(struct perf_session *session, union perf_event *event,
 823                        u64 file_offset, struct perf_sample *sample)
 824 {
 825         if (!dump_trace)
 826                 return;
 827
 828         printf("\n%#" PRIx64 " [%#x]: event: %d\n",
 829                file_offset, event->header.size, event->header.type);
 830
 831         trace_event(event);
 832
 833         if (sample)
 834                 perf_session__print_tstamp(session, event, sample);
 835
 836         printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
 837                event->header.size, perf_event__name(event->header.type));
 838 }
 839
 840 static void dump_sample(struct perf_session *session, union perf_event *event,
 841                         struct perf_sample *sample)
 842 {
 843         if (!dump_trace)
 844                 return;
 845
 846         printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
 847                event->header.misc, sample->pid, sample->tid, sample->ip,
 848                sample->period, sample->addr);
 849
 850         if (session->sample_type & PERF_SAMPLE_CALLCHAIN)
 851                 callchain__printf(sample);
 852
 853         if (session->sample_type & PERF_SAMPLE_BRANCH_STACK)
 854                 branch_stack__printf(sample);
 855 }
 856
 857 static struct machine *
 858         perf_session__find_machine_for_cpumode(struct perf_session *session,
 859                                                union perf_event *event)
 860 {
 861         const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 862
 863         if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
 864                 u32 pid;
 865
 866                 if (event->header.type == PERF_RECORD_MMAP)
 867                         pid = event->mmap.pid;
 868                 else
 869                         pid = event->ip.pid;
 870
 871                 return perf_session__find_machine(session, pid);
 872         }
 873
 874         return perf_session__find_host_machine(session);
 875 }
 876
 877 static int perf_session_deliver_event(struct perf_session *session,
 878                                       union perf_event *event,
 879                                       struct perf_sample *sample,
 880                                       struct perf_tool *tool,
 881                                       u64 file_offset)
 882 {
 883         struct perf_evsel *evsel;
 884         struct machine *machine;
 885
 886         dump_event(session, event, file_offset, sample);
 887
 888         evsel = perf_evlist__id2evsel(session->evlist, sample->id);
 889         if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
 890                 /*
 891                  * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
 892                  * because the tools right now may apply filters, discarding
 893                  * some of the samples. For consistency, in the future we
 894                  * should have something like nr_filtered_samples and remove
 895                  * the sample->period from total_sample_period, etc, KISS for
 896                  * now tho.
 897                  *
 898                  * Also testing against NULL allows us to handle files without
 899                  * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
 900                  * future probably it'll be a good idea to restrict event
 901                  * processing via perf_session to files with both set.
 902                  */
 903                 hists__inc_nr_events(&evsel->hists, event->header.type);
 904         }
 905
 906         machine = perf_session__find_machine_for_cpumode(session, event);
 907
 908         switch (event->header.type) {
 909         case PERF_RECORD_SAMPLE:
 910                 dump_sample(session, event, sample);
 911                 if (evsel == NULL) {
 912                         ++session->hists.stats.nr_unknown_id;
 913                         return 0;
 914                 }
 915                 if (machine == NULL) {
 916                         ++session->hists.stats.nr_unprocessable_samples;
 917                         return 0;
 918                 }
 919                 return tool->sample(tool, event, sample, evsel, machine);
 920         case PERF_RECORD_MMAP:
 921                 return tool->mmap(tool, event, sample, machine);
 922         case PERF_RECORD_COMM:
 923                 return tool->comm(tool, event, sample, machine);
 924         case PERF_RECORD_FORK:
 925                 return tool->fork(tool, event, sample, machine);
 926         case PERF_RECORD_EXIT:
 927                 return tool->exit(tool, event, sample, machine);
 928         case PERF_RECORD_LOST:
 929                 if (tool->lost == perf_event__process_lost)
 930                         session->hists.stats.total_lost += event->lost.lost;
 931                 return tool->lost(tool, event, sample, machine);
 932         case PERF_RECORD_READ:
 933                 return tool->read(tool, event, sample, evsel, machine);
 934         case PERF_RECORD_THROTTLE:
 935                 return tool->throttle(tool, event, sample, machine);
 936         case PERF_RECORD_UNTHROTTLE:
 937                 return tool->unthrottle(tool, event, sample, machine);
 938         default:
 939                 ++session->hists.stats.nr_unknown_events;
 940                 return -1;
 941         }
 942 }
 943
 944 static int perf_session__preprocess_sample(struct perf_session *session,
 945                                            union perf_event *event, struct perf_sample *sample)
 946 {
 947         if (event->header.type != PERF_RECORD_SAMPLE ||
 948             !(session->sample_type & PERF_SAMPLE_CALLCHAIN))
 949                 return 0;
 950
 951         if (!ip_callchain__valid(sample->callchain, event)) {
 952                 pr_debug("call-chain problem with event, skipping it.\n");
 953                 ++session->hists.stats.nr_invalid_chains;
 954                 session->hists.stats.total_invalid_chains += sample->period;
 955                 return -EINVAL;
 956         }
 957         return 0;
 958 }
 959
 960 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
 961                                             struct perf_tool *tool, u64 file_offset)
 962 {
 963         int err;
 964
 965         dump_event(session, event, file_offset, NULL);
 966
 967         /* These events are processed right away */
 968         switch (event->header.type) {
 969         case PERF_RECORD_HEADER_ATTR:
 970                 err = tool->attr(event, &session->evlist);
 971                 if (err == 0)
 972                         perf_session__update_sample_type(session);
 973                 return err;
 974         case PERF_RECORD_HEADER_EVENT_TYPE:
 975                 return tool->event_type(tool, event);
 976         case PERF_RECORD_HEADER_TRACING_DATA:
 977                 /* setup for reading amidst mmap */
 978                 lseek(session->fd, file_offset, SEEK_SET);
 979                 return tool->tracing_data(event, session);
 980         case PERF_RECORD_HEADER_BUILD_ID:
 981                 return tool->build_id(tool, event, session);
 982         case PERF_RECORD_FINISHED_ROUND:
 983                 return tool->finished_round(tool, event, session);
 984         default:
 985                 return -EINVAL;
 986         }
 987 }
 988
 989 static int perf_session__process_event(struct perf_session *session,
 990                                        union perf_event *event,
 991                                        struct perf_tool *tool,
 992                                        u64 file_offset)
 993 {
 994         struct perf_sample sample;
 995         int ret;
 996
 997         if (session->header.needs_swap &&
 998             perf_event__swap_ops[event->header.type])
 999                 perf_event__swap_ops[event->header.type](event);
1000
1001         if (event->header.type >= PERF_RECORD_HEADER_MAX)
1002                 return -EINVAL;
1003
1004         hists__inc_nr_events(&session->hists, event->header.type);
1005
1006         if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1007                 return perf_session__process_user_event(session, event, tool, file_offset);
1008
1009         /*
1010          * For all kernel events we get the sample data
1011          */
1012         ret = perf_session__parse_sample(session, event, &sample);
1013         if (ret)
1014                 return ret;
1015
1016         /* Preprocess sample records - precheck callchains */
1017         if (perf_session__preprocess_sample(session, event, &sample))
1018                 return 0;
1019
1020         if (tool->ordered_samples) {
1021                 ret = perf_session_queue_event(session, event, &sample,
1022                                                file_offset);
1023                 if (ret != -ETIME)
1024                         return ret;
1025         }
1026
1027         return perf_session_deliver_event(session, event, &sample, tool,
1028                                           file_offset);
1029 }
1030
1031 void perf_event_header__bswap(struct perf_event_header *self)
1032 {
1033         self->type = bswap_32(self->type);
1034         self->misc = bswap_16(self->misc);
1035         self->size = bswap_16(self->size);
1036 }
1037
1038 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1039 {
1040         return machine__findnew_thread(&session->host_machine, pid);
1041 }
1042
1043 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
1044 {
1045         struct thread *thread = perf_session__findnew(self, 0);
1046
1047         if (thread == NULL || thread__set_comm(thread, "swapper")) {
1048                 pr_err("problem inserting idle task.\n");
1049                 thread = NULL;
1050         }
1051
1052         return thread;
1053 }
1054
1055 static void perf_session__warn_about_errors(const struct perf_session *session,
1056                                             const struct perf_tool *tool)
1057 {
1058         if (tool->lost == perf_event__process_lost &&
1059             session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) {
1060                 ui__warning("Processed %d events and lost %d chunks!\n\n"
1061                             "Check IO/CPU overload!\n\n",
1062                             session->hists.stats.nr_events[0],
1063                             session->hists.stats.nr_events[PERF_RECORD_LOST]);
1064         }
1065
1066         if (session->hists.stats.nr_unknown_events != 0) {
1067                 ui__warning("Found %u unknown events!\n\n"
1068                             "Is this an older tool processing a perf.data "
1069                             "file generated by a more recent tool?\n\n"
1070                             "If that is not the case, consider "
1071                             "reporting to linux-kernel@vger.kernel.org.\n\n",
1072                             session->hists.stats.nr_unknown_events);
1073         }
1074
1075         if (session->hists.stats.nr_unknown_id != 0) {
1076                 ui__warning("%u samples with id not present in the header\n",
1077                             session->hists.stats.nr_unknown_id);
1078         }
1079
1080         if (session->hists.stats.nr_invalid_chains != 0) {
1081                 ui__warning("Found invalid callchains!\n\n"
1082                             "%u out of %u events were discarded for this reason.\n\n"
1083                             "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1084                             session->hists.stats.nr_invalid_chains,
1085                             session->hists.stats.nr_events[PERF_RECORD_SAMPLE]);
1086         }
1087
1088         if (session->hists.stats.nr_unprocessable_samples != 0) {
1089                 ui__warning("%u unprocessable samples recorded.\n"
1090                             "Do you have a KVM guest running and not using 'perf kvm'?\n",
1091                             session->hists.stats.nr_unprocessable_samples);
1092         }
1093 }
1094
1095 #define session_done()  (*(volatile int *)(&session_done))
1096 volatile int session_done;
1097
1098 static int __perf_session__process_pipe_events(struct perf_session *self,
1099                                                struct perf_tool *tool)
1100 {
1101         union perf_event *event;
1102         uint32_t size, cur_size = 0;
1103         void *buf = NULL;
1104         int skip = 0;
1105         u64 head;
1106         int err;
1107         void *p;
1108
1109         perf_tool__fill_defaults(tool);
1110
1111         head = 0;
1112         cur_size = sizeof(union perf_event);
1113
1114         buf = malloc(cur_size);
1115         if (!buf)
1116                 return -errno;
1117 more:
1118         event = buf;
1119         err = readn(self->fd, event, sizeof(struct perf_event_header));
1120         if (err <= 0) {
1121                 if (err == 0)
1122                         goto done;
1123
1124                 pr_err("failed to read event header\n");
1125                 goto out_err;
1126         }
1127
1128         if (self->header.needs_swap)
1129                 perf_event_header__bswap(&event->header);
1130
1131         size = event->header.size;
1132         if (size == 0)
1133                 size = 8;
1134
1135         if (size > cur_size) {
1136                 void *new = realloc(buf, size);
1137                 if (!new) {
1138                         pr_err("failed to allocate memory to read event\n");
1139                         goto out_err;
1140                 }
1141                 buf = new;
1142                 cur_size = size;
1143                 event = buf;
1144         }
1145         p = event;
1146         p += sizeof(struct perf_event_header);
1147
1148         if (size - sizeof(struct perf_event_header)) {
1149                 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
1150                 if (err <= 0) {
1151                         if (err == 0) {
1152                                 pr_err("unexpected end of event stream\n");
1153                                 goto done;
1154                         }
1155
1156                         pr_err("failed to read event data\n");
1157                         goto out_err;
1158                 }
1159         }
1160
1161         if ((skip = perf_session__process_event(self, event, tool, head)) < 0) {
1162                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1163                        head, event->header.size, event->header.type);
1164                 err = -EINVAL;
1165                 goto out_err;
1166         }
1167
1168         head += size;
1169
1170         if (skip > 0)
1171                 head += skip;
1172
1173         if (!session_done())
1174                 goto more;
1175 done:
1176         err = 0;
1177 out_err:
1178         free(buf);
1179         perf_session__warn_about_errors(self, tool);
1180         perf_session_free_sample_buffers(self);
1181         return err;
1182 }
1183
1184 static union perf_event *
1185 fetch_mmaped_event(struct perf_session *session,
1186                    u64 head, size_t mmap_size, char *buf)
1187 {
1188         union perf_event *event;
1189
1190         /*
1191          * Ensure we have enough space remaining to read
1192          * the size of the event in the headers.
1193          */
1194         if (head + sizeof(event->header) > mmap_size)
1195                 return NULL;
1196
1197         event = (union perf_event *)(buf + head);
1198
1199         if (session->header.needs_swap)
1200                 perf_event_header__bswap(&event->header);
1201
1202         if (head + event->header.size > mmap_size)
1203                 return NULL;
1204
1205         return event;
1206 }
1207
1208 int __perf_session__process_events(struct perf_session *session,
1209                                    u64 data_offset, u64 data_size,
1210                                    u64 file_size, struct perf_tool *tool)
1211 {
1212         u64 head, page_offset, file_offset, file_pos, progress_next;
1213         int err, mmap_prot, mmap_flags, map_idx = 0;
1214         size_t  page_size, mmap_size;
1215         char *buf, *mmaps[8];
1216         union perf_event *event;
1217         uint32_t size;
1218
1219         perf_tool__fill_defaults(tool);
1220
1221         page_size = sysconf(_SC_PAGESIZE);
1222
1223         page_offset = page_size * (data_offset / page_size);
1224         file_offset = page_offset;
1225         head = data_offset - page_offset;
1226
1227         if (data_offset + data_size < file_size)
1228                 file_size = data_offset + data_size;
1229
1230         progress_next = file_size / 16;
1231
1232         mmap_size = session->mmap_window;
1233         if (mmap_size > file_size)
1234                 mmap_size = file_size;
1235
1236         memset(mmaps, 0, sizeof(mmaps));
1237
1238         mmap_prot  = PROT_READ;
1239         mmap_flags = MAP_SHARED;
1240
1241         if (session->header.needs_swap) {
1242                 mmap_prot  |= PROT_WRITE;
1243                 mmap_flags = MAP_PRIVATE;
1244         }
1245 remap:
1246         buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
1247                    file_offset);
1248         if (buf == MAP_FAILED) {
1249                 pr_err("failed to mmap file\n");
1250                 err = -errno;
1251                 goto out_err;
1252         }
1253         mmaps[map_idx] = buf;
1254         map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1255         file_pos = file_offset + head;
1256
1257 more:
1258         event = fetch_mmaped_event(session, head, mmap_size, buf);
1259         if (!event) {
1260                 if (mmaps[map_idx]) {
1261                         munmap(mmaps[map_idx], mmap_size);
1262                         mmaps[map_idx] = NULL;
1263                 }
1264
1265                 page_offset = page_size * (head / page_size);
1266                 file_offset += page_offset;
1267                 head -= page_offset;
1268                 goto remap;
1269         }
1270
1271         size = event->header.size;
1272
1273         if (size == 0 ||
1274             perf_session__process_event(session, event, tool, file_pos) < 0) {
1275                 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1276                        file_offset + head, event->header.size,
1277                        event->header.type);
1278                 err = -EINVAL;
1279                 goto out_err;
1280         }
1281
1282         head += size;
1283         file_pos += size;
1284
1285         if (file_pos >= progress_next) {
1286                 progress_next += file_size / 16;
1287                 ui_progress__update(file_pos, file_size,
1288                                     "Processing events...");
1289         }
1290
1291         if (file_pos < file_size)
1292                 goto more;
1293
1294         err = 0;
1295         /* do the final flush for ordered samples */
1296         session->ordered_samples.next_flush = ULLONG_MAX;
1297         flush_sample_queue(session, tool);
1298 out_err:
1299         perf_session__warn_about_errors(session, tool);
1300         perf_session_free_sample_buffers(session);
1301         return err;
1302 }
1303
1304 int perf_session__process_events(struct perf_session *self,
1305                                  struct perf_tool *tool)
1306 {
1307         int err;
1308
1309         if (perf_session__register_idle_thread(self) == NULL)
1310                 return -ENOMEM;
1311
1312         if (!self->fd_pipe)
1313                 err = __perf_session__process_events(self,
1314                                                      self->header.data_offset,
1315                                                      self->header.data_size,
1316                                                      self->size, tool);
1317         else
1318                 err = __perf_session__process_pipe_events(self, tool);
1319
1320         return err;
1321 }
1322
1323 bool perf_session__has_traces(struct perf_session *self, const char *msg)
1324 {
1325         if (!(self->sample_type & PERF_SAMPLE_RAW)) {
1326                 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1327                 return false;
1328         }
1329
1330         return true;
1331 }
1332
1333 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1334                                      const char *symbol_name, u64 addr)
1335 {
1336         char *bracket;
1337         enum map_type i;
1338         struct ref_reloc_sym *ref;
1339
1340         ref = zalloc(sizeof(struct ref_reloc_sym));
1341         if (ref == NULL)
1342                 return -ENOMEM;
1343
1344         ref->name = strdup(symbol_name);
1345         if (ref->name == NULL) {
1346                 free(ref);
1347                 return -ENOMEM;
1348         }
1349
1350         bracket = strchr(ref->name, ']');
1351         if (bracket)
1352                 *bracket = '\0';
1353
1354         ref->addr = addr;
1355
1356         for (i = 0; i < MAP__NR_TYPES; ++i) {
1357                 struct kmap *kmap = map__kmap(maps[i]);
1358                 kmap->ref_reloc_sym = ref;
1359         }
1360
1361         return 0;
1362 }
1363
1364 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1365 {
1366         return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
1367                __dsos__fprintf(&self->host_machine.user_dsos, fp) +
1368                machines__fprintf_dsos(&self->machines, fp);
1369 }
1370
1371 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1372                                           bool with_hits)
1373 {
1374         size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
1375         return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
1376 }
1377
1378 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1379 {
1380         struct perf_evsel *pos;
1381         size_t ret = fprintf(fp, "Aggregated stats:\n");
1382
1383         ret += hists__fprintf_nr_events(&session->hists, fp);
1384
1385         list_for_each_entry(pos, &session->evlist->entries, node) {
1386                 ret += fprintf(fp, "%s stats:\n", event_name(pos));
1387                 ret += hists__fprintf_nr_events(&pos->hists, fp);
1388         }
1389
1390         return ret;
1391 }
1392
1393 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1394 {
1395         /*
1396          * FIXME: Here we have to actually print all the machines in this
1397          * session, not just the host...
1398          */
1399         return machine__fprintf(&session->host_machine, fp);
1400 }
1401
1402 void perf_session__remove_thread(struct perf_session *session,
1403                                  struct thread *th)
1404 {
1405         /*
1406          * FIXME: This one makes no sense, we need to remove the thread from
1407          * the machine it belongs to, perf_session can have many machines, so
1408          * doing it always on ->host_machine is wrong.  Fix when auditing all
1409          * the 'perf kvm' code.
1410          */
1411         machine__remove_thread(&session->host_machine, th);
1412 }
1413
1414 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1415                                               unsigned int type)
1416 {
1417         struct perf_evsel *pos;
1418
1419         list_for_each_entry(pos, &session->evlist->entries, node) {
1420                 if (pos->attr.type == type)
1421                         return pos;
1422         }
1423         return NULL;
1424 }
1425
1426 void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
1427                           struct machine *machine, struct perf_evsel *evsel,
1428                           int print_sym, int print_dso, int print_symoffset)
1429 {
1430         struct addr_location al;
1431         struct callchain_cursor *cursor = &evsel->hists.callchain_cursor;
1432         struct callchain_cursor_node *node;
1433
1434         if (perf_event__preprocess_sample(event, machine, &al, sample,
1435                                           NULL) < 0) {
1436                 error("problem processing %d event, skipping it.\n",
1437                         event->header.type);
1438                 return;
1439         }
1440
1441         if (symbol_conf.use_callchain && sample->callchain) {
1442
1443                 if (machine__resolve_callchain(machine, evsel, al.thread,
1444                                                 sample->callchain, NULL) != 0) {
1445                         if (verbose)
1446                                 error("Failed to resolve callchain. Skipping\n");
1447                         return;
1448                 }
1449                 callchain_cursor_commit(cursor);
1450
1451                 while (1) {
1452                         node = callchain_cursor_current(cursor);
1453                         if (!node)
1454                                 break;
1455
1456                         printf("\t%16" PRIx64, node->ip);
1457                         if (print_sym) {
1458                                 printf(" ");
1459                                 symbol__fprintf_symname(node->sym, stdout);
1460                         }
1461                         if (print_dso) {
1462                                 printf(" (");
1463                                 map__fprintf_dsoname(al.map, stdout);
1464                                 printf(")");
1465                         }
1466                         printf("\n");
1467
1468                         callchain_cursor_advance(cursor);
1469                 }
1470
1471         } else {
1472                 printf("%16" PRIx64, sample->ip);
1473                 if (print_sym) {
1474                         printf(" ");
1475                         if (print_symoffset)
1476                                 symbol__fprintf_symname_offs(al.sym, &al,
1477                                                              stdout);
1478                         else
1479                                 symbol__fprintf_symname(al.sym, stdout);
1480                 }
1481
1482                 if (print_dso) {
1483                         printf(" (");
1484                         map__fprintf_dsoname(al.map, stdout);
1485                         printf(")");
1486                 }
1487         }
1488 }
1489
1490 int perf_session__cpu_bitmap(struct perf_session *session,
1491                              const char *cpu_list, unsigned long *cpu_bitmap)
1492 {
1493         int i;
1494         struct cpu_map *map;
1495
1496         for (i = 0; i < PERF_TYPE_MAX; ++i) {
1497                 struct perf_evsel *evsel;
1498
1499                 evsel = perf_session__find_first_evtype(session, i);
1500                 if (!evsel)
1501                         continue;
1502
1503                 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1504                         pr_err("File does not contain CPU events. "
1505                                "Remove -c option to proceed.\n");
1506                         return -1;
1507                 }
1508         }
1509
1510         map = cpu_map__new(cpu_list);
1511         if (map == NULL) {
1512                 pr_err("Invalid cpu_list\n");
1513                 return -1;
1514         }
1515
1516         for (i = 0; i < map->nr; i++) {
1517                 int cpu = map->map[i];
1518
1519                 if (cpu >= MAX_NR_CPUS) {
1520                         pr_err("Requested CPU %d too large. "
1521                                "Consider raising MAX_NR_CPUS\n", cpu);
1522                         return -1;
1523                 }
1524
1525                 set_bit(cpu, cpu_bitmap);
1526         }
1527
1528         return 0;
1529 }
1530
1531 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1532                                 bool full)
1533 {
1534         struct stat st;
1535         int ret;
1536
1537         if (session == NULL || fp == NULL)
1538                 return;
1539
1540         ret = fstat(session->fd, &st);
1541         if (ret == -1)
1542                 return;
1543
1544         fprintf(fp, "# ========\n");
1545         fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1546         perf_header__fprintf_info(session, fp, full);
1547         fprintf(fp, "# ========\n#\n");
1548 }