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 "session.h" 11 #include "sort.h" 12 #include "util.h" 13 14 static int perf_session__open(struct perf_session *self, bool force) 15 { 16 struct stat input_stat; 17 18 if (!strcmp(self->filename, "-")) { 19 self->fd_pipe = true; 20 self->fd = STDIN_FILENO; 21 22 if (perf_header__read(self, self->fd) < 0) 23 pr_err("incompatible file format"); 24 25 return 0; 26 } 27 28 self->fd = open(self->filename, O_RDONLY); 29 if (self->fd < 0) { 30 int err = errno; 31 32 pr_err("failed to open %s: %s", self->filename, strerror(err)); 33 if (err == ENOENT && !strcmp(self->filename, "perf.data")) 34 pr_err(" (try 'perf record' first)"); 35 pr_err("\n"); 36 return -errno; 37 } 38 39 if (fstat(self->fd, &input_stat) < 0) 40 goto out_close; 41 42 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { 43 pr_err("file %s not owned by current user or root\n", 44 self->filename); 45 goto out_close; 46 } 47 48 if (!input_stat.st_size) { 49 pr_info("zero-sized file (%s), nothing to do!\n", 50 self->filename); 51 goto out_close; 52 } 53 54 if (perf_header__read(self, self->fd) < 0) { 55 pr_err("incompatible file format"); 56 goto out_close; 57 } 58 59 self->size = input_stat.st_size; 60 return 0; 61 62 out_close: 63 close(self->fd); 64 self->fd = -1; 65 return -1; 66 } 67 68 void perf_session__update_sample_type(struct perf_session *self) 69 { 70 self->sample_type = perf_header__sample_type(&self->header); 71 } 72 73 int perf_session__create_kernel_maps(struct perf_session *self) 74 { 75 int ret = machine__create_kernel_maps(&self->host_machine); 76 77 if (ret >= 0) 78 ret = machines__create_guest_kernel_maps(&self->machines); 79 return ret; 80 } 81 82 static void perf_session__destroy_kernel_maps(struct perf_session *self) 83 { 84 machine__destroy_kernel_maps(&self->host_machine); 85 machines__destroy_guest_kernel_maps(&self->machines); 86 } 87 88 struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe) 89 { 90 size_t len = filename ? strlen(filename) + 1 : 0; 91 struct perf_session *self = zalloc(sizeof(*self) + len); 92 93 if (self == NULL) 94 goto out; 95 96 if (perf_header__init(&self->header) < 0) 97 goto out_free; 98 99 memcpy(self->filename, filename, len); 100 self->threads = RB_ROOT; 101 INIT_LIST_HEAD(&self->dead_threads); 102 self->hists_tree = RB_ROOT; 103 self->last_match = NULL; 104 self->mmap_window = 32; 105 self->machines = RB_ROOT; 106 self->repipe = repipe; 107 INIT_LIST_HEAD(&self->ordered_samples.samples); 108 machine__init(&self->host_machine, "", HOST_KERNEL_ID); 109 110 if (mode == O_RDONLY) { 111 if (perf_session__open(self, force) < 0) 112 goto out_delete; 113 } else if (mode == O_WRONLY) { 114 /* 115 * In O_RDONLY mode this will be performed when reading the 116 * kernel MMAP event, in event__process_mmap(). 117 */ 118 if (perf_session__create_kernel_maps(self) < 0) 119 goto out_delete; 120 } 121 122 perf_session__update_sample_type(self); 123 out: 124 return self; 125 out_free: 126 free(self); 127 return NULL; 128 out_delete: 129 perf_session__delete(self); 130 return NULL; 131 } 132 133 static void perf_session__delete_dead_threads(struct perf_session *self) 134 { 135 struct thread *n, *t; 136 137 list_for_each_entry_safe(t, n, &self->dead_threads, node) { 138 list_del(&t->node); 139 thread__delete(t); 140 } 141 } 142 143 static void perf_session__delete_threads(struct perf_session *self) 144 { 145 struct rb_node *nd = rb_first(&self->threads); 146 147 while (nd) { 148 struct thread *t = rb_entry(nd, struct thread, rb_node); 149 150 rb_erase(&t->rb_node, &self->threads); 151 nd = rb_next(nd); 152 thread__delete(t); 153 } 154 } 155 156 void perf_session__delete(struct perf_session *self) 157 { 158 perf_header__exit(&self->header); 159 perf_session__destroy_kernel_maps(self); 160 perf_session__delete_dead_threads(self); 161 perf_session__delete_threads(self); 162 machine__exit(&self->host_machine); 163 close(self->fd); 164 free(self); 165 } 166 167 void perf_session__remove_thread(struct perf_session *self, struct thread *th) 168 { 169 self->last_match = NULL; 170 rb_erase(&th->rb_node, &self->threads); 171 /* 172 * We may have references to this thread, for instance in some hist_entry 173 * instances, so just move them to a separate list. 174 */ 175 list_add_tail(&th->node, &self->dead_threads); 176 } 177 178 static bool symbol__match_parent_regex(struct symbol *sym) 179 { 180 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) 181 return 1; 182 183 return 0; 184 } 185 186 struct map_symbol *perf_session__resolve_callchain(struct perf_session *self, 187 struct thread *thread, 188 struct ip_callchain *chain, 189 struct symbol **parent) 190 { 191 u8 cpumode = PERF_RECORD_MISC_USER; 192 unsigned int i; 193 struct map_symbol *syms = calloc(chain->nr, sizeof(*syms)); 194 195 if (!syms) 196 return NULL; 197 198 for (i = 0; i < chain->nr; i++) { 199 u64 ip = chain->ips[i]; 200 struct addr_location al; 201 202 if (ip >= PERF_CONTEXT_MAX) { 203 switch (ip) { 204 case PERF_CONTEXT_HV: 205 cpumode = PERF_RECORD_MISC_HYPERVISOR; break; 206 case PERF_CONTEXT_KERNEL: 207 cpumode = PERF_RECORD_MISC_KERNEL; break; 208 case PERF_CONTEXT_USER: 209 cpumode = PERF_RECORD_MISC_USER; break; 210 default: 211 break; 212 } 213 continue; 214 } 215 216 al.filtered = false; 217 thread__find_addr_location(thread, self, cpumode, 218 MAP__FUNCTION, thread->pid, ip, &al, NULL); 219 if (al.sym != NULL) { 220 if (sort__has_parent && !*parent && 221 symbol__match_parent_regex(al.sym)) 222 *parent = al.sym; 223 if (!symbol_conf.use_callchain) 224 break; 225 syms[i].map = al.map; 226 syms[i].sym = al.sym; 227 } 228 } 229 230 return syms; 231 } 232 233 static int process_event_stub(event_t *event __used, 234 struct perf_session *session __used) 235 { 236 dump_printf(": unhandled!\n"); 237 return 0; 238 } 239 240 static int process_finished_round_stub(event_t *event __used, 241 struct perf_session *session __used, 242 struct perf_event_ops *ops __used) 243 { 244 dump_printf(": unhandled!\n"); 245 return 0; 246 } 247 248 static int process_finished_round(event_t *event, 249 struct perf_session *session, 250 struct perf_event_ops *ops); 251 252 static void perf_event_ops__fill_defaults(struct perf_event_ops *handler) 253 { 254 if (handler->sample == NULL) 255 handler->sample = process_event_stub; 256 if (handler->mmap == NULL) 257 handler->mmap = process_event_stub; 258 if (handler->comm == NULL) 259 handler->comm = process_event_stub; 260 if (handler->fork == NULL) 261 handler->fork = process_event_stub; 262 if (handler->exit == NULL) 263 handler->exit = process_event_stub; 264 if (handler->lost == NULL) 265 handler->lost = event__process_lost; 266 if (handler->read == NULL) 267 handler->read = process_event_stub; 268 if (handler->throttle == NULL) 269 handler->throttle = process_event_stub; 270 if (handler->unthrottle == NULL) 271 handler->unthrottle = process_event_stub; 272 if (handler->attr == NULL) 273 handler->attr = process_event_stub; 274 if (handler->event_type == NULL) 275 handler->event_type = process_event_stub; 276 if (handler->tracing_data == NULL) 277 handler->tracing_data = process_event_stub; 278 if (handler->build_id == NULL) 279 handler->build_id = process_event_stub; 280 if (handler->finished_round == NULL) { 281 if (handler->ordered_samples) 282 handler->finished_round = process_finished_round; 283 else 284 handler->finished_round = process_finished_round_stub; 285 } 286 } 287 288 void mem_bswap_64(void *src, int byte_size) 289 { 290 u64 *m = src; 291 292 while (byte_size > 0) { 293 *m = bswap_64(*m); 294 byte_size -= sizeof(u64); 295 ++m; 296 } 297 } 298 299 static void event__all64_swap(event_t *self) 300 { 301 struct perf_event_header *hdr = &self->header; 302 mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr)); 303 } 304 305 static void event__comm_swap(event_t *self) 306 { 307 self->comm.pid = bswap_32(self->comm.pid); 308 self->comm.tid = bswap_32(self->comm.tid); 309 } 310 311 static void event__mmap_swap(event_t *self) 312 { 313 self->mmap.pid = bswap_32(self->mmap.pid); 314 self->mmap.tid = bswap_32(self->mmap.tid); 315 self->mmap.start = bswap_64(self->mmap.start); 316 self->mmap.len = bswap_64(self->mmap.len); 317 self->mmap.pgoff = bswap_64(self->mmap.pgoff); 318 } 319 320 static void event__task_swap(event_t *self) 321 { 322 self->fork.pid = bswap_32(self->fork.pid); 323 self->fork.tid = bswap_32(self->fork.tid); 324 self->fork.ppid = bswap_32(self->fork.ppid); 325 self->fork.ptid = bswap_32(self->fork.ptid); 326 self->fork.time = bswap_64(self->fork.time); 327 } 328 329 static void event__read_swap(event_t *self) 330 { 331 self->read.pid = bswap_32(self->read.pid); 332 self->read.tid = bswap_32(self->read.tid); 333 self->read.value = bswap_64(self->read.value); 334 self->read.time_enabled = bswap_64(self->read.time_enabled); 335 self->read.time_running = bswap_64(self->read.time_running); 336 self->read.id = bswap_64(self->read.id); 337 } 338 339 static void event__attr_swap(event_t *self) 340 { 341 size_t size; 342 343 self->attr.attr.type = bswap_32(self->attr.attr.type); 344 self->attr.attr.size = bswap_32(self->attr.attr.size); 345 self->attr.attr.config = bswap_64(self->attr.attr.config); 346 self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period); 347 self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type); 348 self->attr.attr.read_format = bswap_64(self->attr.attr.read_format); 349 self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events); 350 self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type); 351 self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr); 352 self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len); 353 354 size = self->header.size; 355 size -= (void *)&self->attr.id - (void *)self; 356 mem_bswap_64(self->attr.id, size); 357 } 358 359 static void event__event_type_swap(event_t *self) 360 { 361 self->event_type.event_type.event_id = 362 bswap_64(self->event_type.event_type.event_id); 363 } 364 365 static void event__tracing_data_swap(event_t *self) 366 { 367 self->tracing_data.size = bswap_32(self->tracing_data.size); 368 } 369 370 typedef void (*event__swap_op)(event_t *self); 371 372 static event__swap_op event__swap_ops[] = { 373 [PERF_RECORD_MMAP] = event__mmap_swap, 374 [PERF_RECORD_COMM] = event__comm_swap, 375 [PERF_RECORD_FORK] = event__task_swap, 376 [PERF_RECORD_EXIT] = event__task_swap, 377 [PERF_RECORD_LOST] = event__all64_swap, 378 [PERF_RECORD_READ] = event__read_swap, 379 [PERF_RECORD_SAMPLE] = event__all64_swap, 380 [PERF_RECORD_HEADER_ATTR] = event__attr_swap, 381 [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap, 382 [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap, 383 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 384 [PERF_RECORD_HEADER_MAX] = NULL, 385 }; 386 387 struct sample_queue { 388 u64 timestamp; 389 event_t *event; 390 struct list_head list; 391 }; 392 393 static void flush_sample_queue(struct perf_session *s, 394 struct perf_event_ops *ops) 395 { 396 struct ordered_samples *os = &s->ordered_samples; 397 struct list_head *head = &os->samples; 398 struct sample_queue *tmp, *iter; 399 u64 limit = os->next_flush; 400 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 401 402 if (!ops->ordered_samples || !limit) 403 return; 404 405 list_for_each_entry_safe(iter, tmp, head, list) { 406 if (iter->timestamp > limit) 407 break; 408 409 ops->sample(iter->event, s); 410 411 os->last_flush = iter->timestamp; 412 list_del(&iter->list); 413 free(iter->event); 414 free(iter); 415 } 416 417 if (list_empty(head)) { 418 os->last_sample = NULL; 419 } else if (last_ts <= limit) { 420 os->last_sample = 421 list_entry(head->prev, struct sample_queue, list); 422 } 423 } 424 425 /* 426 * When perf record finishes a pass on every buffers, it records this pseudo 427 * event. 428 * We record the max timestamp t found in the pass n. 429 * Assuming these timestamps are monotonic across cpus, we know that if 430 * a buffer still has events with timestamps below t, they will be all 431 * available and then read in the pass n + 1. 432 * Hence when we start to read the pass n + 2, we can safely flush every 433 * events with timestamps below t. 434 * 435 * ============ PASS n ================= 436 * CPU 0 | CPU 1 437 * | 438 * cnt1 timestamps | cnt2 timestamps 439 * 1 | 2 440 * 2 | 3 441 * - | 4 <--- max recorded 442 * 443 * ============ PASS n + 1 ============== 444 * CPU 0 | CPU 1 445 * | 446 * cnt1 timestamps | cnt2 timestamps 447 * 3 | 5 448 * 4 | 6 449 * 5 | 7 <---- max recorded 450 * 451 * Flush every events below timestamp 4 452 * 453 * ============ PASS n + 2 ============== 454 * CPU 0 | CPU 1 455 * | 456 * cnt1 timestamps | cnt2 timestamps 457 * 6 | 8 458 * 7 | 9 459 * - | 10 460 * 461 * Flush every events below timestamp 7 462 * etc... 463 */ 464 static int process_finished_round(event_t *event __used, 465 struct perf_session *session, 466 struct perf_event_ops *ops) 467 { 468 flush_sample_queue(session, ops); 469 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 470 471 return 0; 472 } 473 474 /* The queue is ordered by time */ 475 static void __queue_sample_event(struct sample_queue *new, 476 struct perf_session *s) 477 { 478 struct ordered_samples *os = &s->ordered_samples; 479 struct sample_queue *sample = os->last_sample; 480 u64 timestamp = new->timestamp; 481 struct list_head *p; 482 483 os->last_sample = new; 484 485 if (!sample) { 486 list_add(&new->list, &os->samples); 487 os->max_timestamp = timestamp; 488 return; 489 } 490 491 /* 492 * last_sample might point to some random place in the list as it's 493 * the last queued event. We expect that the new event is close to 494 * this. 495 */ 496 if (sample->timestamp <= timestamp) { 497 while (sample->timestamp <= timestamp) { 498 p = sample->list.next; 499 if (p == &os->samples) { 500 list_add_tail(&new->list, &os->samples); 501 os->max_timestamp = timestamp; 502 return; 503 } 504 sample = list_entry(p, struct sample_queue, list); 505 } 506 list_add_tail(&new->list, &sample->list); 507 } else { 508 while (sample->timestamp > timestamp) { 509 p = sample->list.prev; 510 if (p == &os->samples) { 511 list_add(&new->list, &os->samples); 512 return; 513 } 514 sample = list_entry(p, struct sample_queue, list); 515 } 516 list_add(&new->list, &sample->list); 517 } 518 } 519 520 static int queue_sample_event(event_t *event, struct sample_data *data, 521 struct perf_session *s) 522 { 523 u64 timestamp = data->time; 524 struct sample_queue *new; 525 526 527 if (timestamp < s->ordered_samples.last_flush) { 528 printf("Warning: Timestamp below last timeslice flush\n"); 529 return -EINVAL; 530 } 531 532 new = malloc(sizeof(*new)); 533 if (!new) 534 return -ENOMEM; 535 536 new->timestamp = timestamp; 537 538 new->event = malloc(event->header.size); 539 if (!new->event) { 540 free(new); 541 return -ENOMEM; 542 } 543 544 memcpy(new->event, event, event->header.size); 545 546 __queue_sample_event(new, s); 547 548 return 0; 549 } 550 551 static int perf_session__process_sample(event_t *event, struct perf_session *s, 552 struct perf_event_ops *ops) 553 { 554 struct sample_data data; 555 556 if (!ops->ordered_samples) 557 return ops->sample(event, s); 558 559 bzero(&data, sizeof(struct sample_data)); 560 event__parse_sample(event, s->sample_type, &data); 561 562 queue_sample_event(event, &data, s); 563 564 return 0; 565 } 566 567 static int perf_session__process_event(struct perf_session *self, 568 event_t *event, 569 struct perf_event_ops *ops, 570 u64 file_offset) 571 { 572 trace_event(event); 573 574 if (event->header.type < PERF_RECORD_HEADER_MAX) { 575 dump_printf("%#Lx [%#x]: PERF_RECORD_%s", 576 file_offset, event->header.size, 577 event__name[event->header.type]); 578 hists__inc_nr_events(&self->hists, event->header.type); 579 } 580 581 if (self->header.needs_swap && event__swap_ops[event->header.type]) 582 event__swap_ops[event->header.type](event); 583 584 switch (event->header.type) { 585 case PERF_RECORD_SAMPLE: 586 return perf_session__process_sample(event, self, ops); 587 case PERF_RECORD_MMAP: 588 return ops->mmap(event, self); 589 case PERF_RECORD_COMM: 590 return ops->comm(event, self); 591 case PERF_RECORD_FORK: 592 return ops->fork(event, self); 593 case PERF_RECORD_EXIT: 594 return ops->exit(event, self); 595 case PERF_RECORD_LOST: 596 return ops->lost(event, self); 597 case PERF_RECORD_READ: 598 return ops->read(event, self); 599 case PERF_RECORD_THROTTLE: 600 return ops->throttle(event, self); 601 case PERF_RECORD_UNTHROTTLE: 602 return ops->unthrottle(event, self); 603 case PERF_RECORD_HEADER_ATTR: 604 return ops->attr(event, self); 605 case PERF_RECORD_HEADER_EVENT_TYPE: 606 return ops->event_type(event, self); 607 case PERF_RECORD_HEADER_TRACING_DATA: 608 /* setup for reading amidst mmap */ 609 lseek(self->fd, file_offset, SEEK_SET); 610 return ops->tracing_data(event, self); 611 case PERF_RECORD_HEADER_BUILD_ID: 612 return ops->build_id(event, self); 613 case PERF_RECORD_FINISHED_ROUND: 614 return ops->finished_round(event, self, ops); 615 default: 616 ++self->hists.stats.nr_unknown_events; 617 return -1; 618 } 619 } 620 621 void perf_event_header__bswap(struct perf_event_header *self) 622 { 623 self->type = bswap_32(self->type); 624 self->misc = bswap_16(self->misc); 625 self->size = bswap_16(self->size); 626 } 627 628 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 629 { 630 struct thread *thread = perf_session__findnew(self, 0); 631 632 if (thread == NULL || thread__set_comm(thread, "swapper")) { 633 pr_err("problem inserting idle task.\n"); 634 thread = NULL; 635 } 636 637 return thread; 638 } 639 640 int do_read(int fd, void *buf, size_t size) 641 { 642 void *buf_start = buf; 643 644 while (size) { 645 int ret = read(fd, buf, size); 646 647 if (ret <= 0) 648 return ret; 649 650 size -= ret; 651 buf += ret; 652 } 653 654 return buf - buf_start; 655 } 656 657 #define session_done() (*(volatile int *)(&session_done)) 658 volatile int session_done; 659 660 static int __perf_session__process_pipe_events(struct perf_session *self, 661 struct perf_event_ops *ops) 662 { 663 event_t event; 664 uint32_t size; 665 int skip = 0; 666 u64 head; 667 int err; 668 void *p; 669 670 perf_event_ops__fill_defaults(ops); 671 672 head = 0; 673 more: 674 err = do_read(self->fd, &event, sizeof(struct perf_event_header)); 675 if (err <= 0) { 676 if (err == 0) 677 goto done; 678 679 pr_err("failed to read event header\n"); 680 goto out_err; 681 } 682 683 if (self->header.needs_swap) 684 perf_event_header__bswap(&event.header); 685 686 size = event.header.size; 687 if (size == 0) 688 size = 8; 689 690 p = &event; 691 p += sizeof(struct perf_event_header); 692 693 if (size - sizeof(struct perf_event_header)) { 694 err = do_read(self->fd, p, 695 size - sizeof(struct perf_event_header)); 696 if (err <= 0) { 697 if (err == 0) { 698 pr_err("unexpected end of event stream\n"); 699 goto done; 700 } 701 702 pr_err("failed to read event data\n"); 703 goto out_err; 704 } 705 } 706 707 if (size == 0 || 708 (skip = perf_session__process_event(self, &event, ops, head)) < 0) { 709 dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", 710 head, event.header.size, event.header.type); 711 /* 712 * assume we lost track of the stream, check alignment, and 713 * increment a single u64 in the hope to catch on again 'soon'. 714 */ 715 if (unlikely(head & 7)) 716 head &= ~7ULL; 717 718 size = 8; 719 } 720 721 head += size; 722 723 dump_printf("\n%#Lx [%#x]: event: %d\n", 724 head, event.header.size, event.header.type); 725 726 if (skip > 0) 727 head += skip; 728 729 if (!session_done()) 730 goto more; 731 done: 732 err = 0; 733 out_err: 734 return err; 735 } 736 737 int __perf_session__process_events(struct perf_session *session, 738 u64 data_offset, u64 data_size, 739 u64 file_size, struct perf_event_ops *ops) 740 { 741 u64 head, page_offset, file_offset, file_pos; 742 int err, mmap_prot, mmap_flags; 743 struct ui_progress *progress; 744 size_t page_size; 745 event_t *event; 746 uint32_t size; 747 char *buf; 748 749 progress = ui_progress__new("Processing events...", session->size); 750 if (progress == NULL) 751 return -1; 752 753 perf_event_ops__fill_defaults(ops); 754 755 page_size = sysconf(_SC_PAGESIZE); 756 757 page_offset = page_size * (data_offset / page_size); 758 file_offset = page_offset; 759 head = data_offset - page_offset; 760 761 if (data_offset + data_size < file_size) 762 file_size = data_offset + data_size; 763 764 mmap_prot = PROT_READ; 765 mmap_flags = MAP_SHARED; 766 767 if (session->header.needs_swap) { 768 mmap_prot |= PROT_WRITE; 769 mmap_flags = MAP_PRIVATE; 770 } 771 remap: 772 buf = mmap(NULL, page_size * session->mmap_window, mmap_prot, 773 mmap_flags, session->fd, file_offset); 774 if (buf == MAP_FAILED) { 775 pr_err("failed to mmap file\n"); 776 err = -errno; 777 goto out_err; 778 } 779 file_pos = file_offset + head; 780 ui_progress__update(progress, file_offset); 781 782 more: 783 event = (event_t *)(buf + head); 784 785 if (session->header.needs_swap) 786 perf_event_header__bswap(&event->header); 787 size = event->header.size; 788 if (size == 0) 789 size = 8; 790 791 if (head + event->header.size >= page_size * session->mmap_window) { 792 int munmap_ret; 793 794 munmap_ret = munmap(buf, page_size * session->mmap_window); 795 assert(munmap_ret == 0); 796 797 page_offset = page_size * (head / page_size); 798 file_offset += page_offset; 799 head -= page_offset; 800 goto remap; 801 } 802 803 size = event->header.size; 804 805 dump_printf("\n%#Lx [%#x]: event: %d\n", 806 file_pos, event->header.size, event->header.type); 807 808 if (size == 0 || 809 perf_session__process_event(session, event, ops, file_pos) < 0) { 810 dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", 811 file_offset + head, event->header.size, 812 event->header.type); 813 /* 814 * assume we lost track of the stream, check alignment, and 815 * increment a single u64 in the hope to catch on again 'soon'. 816 */ 817 if (unlikely(head & 7)) 818 head &= ~7ULL; 819 820 size = 8; 821 } 822 823 head += size; 824 file_pos += size; 825 826 if (file_pos < file_size) 827 goto more; 828 829 err = 0; 830 /* do the final flush for ordered samples */ 831 session->ordered_samples.next_flush = ULLONG_MAX; 832 flush_sample_queue(session, ops); 833 out_err: 834 ui_progress__delete(progress); 835 836 if (ops->lost == event__process_lost && 837 session->hists.stats.total_lost != 0) { 838 ui__warning("Processed %Lu events and LOST %Lu!\n\n" 839 "Check IO/CPU overload!\n\n", 840 session->hists.stats.total_period, 841 session->hists.stats.total_lost); 842 } 843 844 if (session->hists.stats.nr_unknown_events != 0) { 845 ui__warning("Found %u unknown events!\n\n" 846 "Is this an older tool processing a perf.data " 847 "file generated by a more recent tool?\n\n" 848 "If that is not the case, consider " 849 "reporting to linux-kernel@vger.kernel.org.\n\n", 850 session->hists.stats.nr_unknown_events); 851 } 852 853 return err; 854 } 855 856 int perf_session__process_events(struct perf_session *self, 857 struct perf_event_ops *ops) 858 { 859 int err; 860 861 if (perf_session__register_idle_thread(self) == NULL) 862 return -ENOMEM; 863 864 if (!self->fd_pipe) 865 err = __perf_session__process_events(self, 866 self->header.data_offset, 867 self->header.data_size, 868 self->size, ops); 869 else 870 err = __perf_session__process_pipe_events(self, ops); 871 872 return err; 873 } 874 875 bool perf_session__has_traces(struct perf_session *self, const char *msg) 876 { 877 if (!(self->sample_type & PERF_SAMPLE_RAW)) { 878 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 879 return false; 880 } 881 882 return true; 883 } 884 885 int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps, 886 const char *symbol_name, 887 u64 addr) 888 { 889 char *bracket; 890 enum map_type i; 891 struct ref_reloc_sym *ref; 892 893 ref = zalloc(sizeof(struct ref_reloc_sym)); 894 if (ref == NULL) 895 return -ENOMEM; 896 897 ref->name = strdup(symbol_name); 898 if (ref->name == NULL) { 899 free(ref); 900 return -ENOMEM; 901 } 902 903 bracket = strchr(ref->name, ']'); 904 if (bracket) 905 *bracket = '\0'; 906 907 ref->addr = addr; 908 909 for (i = 0; i < MAP__NR_TYPES; ++i) { 910 struct kmap *kmap = map__kmap(maps[i]); 911 kmap->ref_reloc_sym = ref; 912 } 913 914 return 0; 915 } 916 917 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 918 { 919 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + 920 __dsos__fprintf(&self->host_machine.user_dsos, fp) + 921 machines__fprintf_dsos(&self->machines, fp); 922 } 923 924 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 925 bool with_hits) 926 { 927 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); 928 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); 929 } 930