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_head); 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 struct sample_event *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 list_head *head = &s->ordered_samples.samples_head; 397 u64 limit = s->ordered_samples.next_flush; 398 struct sample_queue *tmp, *iter; 399 400 if (!ops->ordered_samples || !limit) 401 return; 402 403 list_for_each_entry_safe(iter, tmp, head, list) { 404 if (iter->timestamp > limit) 405 return; 406 407 if (iter == s->ordered_samples.last_inserted) 408 s->ordered_samples.last_inserted = NULL; 409 410 ops->sample((event_t *)iter->event, s); 411 412 s->ordered_samples.last_flush = iter->timestamp; 413 list_del(&iter->list); 414 free(iter->event); 415 free(iter); 416 } 417 } 418 419 /* 420 * When perf record finishes a pass on every buffers, it records this pseudo 421 * event. 422 * We record the max timestamp t found in the pass n. 423 * Assuming these timestamps are monotonic across cpus, we know that if 424 * a buffer still has events with timestamps below t, they will be all 425 * available and then read in the pass n + 1. 426 * Hence when we start to read the pass n + 2, we can safely flush every 427 * events with timestamps below t. 428 * 429 * ============ PASS n ================= 430 * CPU 0 | CPU 1 431 * | 432 * cnt1 timestamps | cnt2 timestamps 433 * 1 | 2 434 * 2 | 3 435 * - | 4 <--- max recorded 436 * 437 * ============ PASS n + 1 ============== 438 * CPU 0 | CPU 1 439 * | 440 * cnt1 timestamps | cnt2 timestamps 441 * 3 | 5 442 * 4 | 6 443 * 5 | 7 <---- max recorded 444 * 445 * Flush every events below timestamp 4 446 * 447 * ============ PASS n + 2 ============== 448 * CPU 0 | CPU 1 449 * | 450 * cnt1 timestamps | cnt2 timestamps 451 * 6 | 8 452 * 7 | 9 453 * - | 10 454 * 455 * Flush every events below timestamp 7 456 * etc... 457 */ 458 static int process_finished_round(event_t *event __used, 459 struct perf_session *session, 460 struct perf_event_ops *ops) 461 { 462 flush_sample_queue(session, ops); 463 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 464 465 return 0; 466 } 467 468 static void __queue_sample_end(struct sample_queue *new, struct list_head *head) 469 { 470 struct sample_queue *iter; 471 472 list_for_each_entry_reverse(iter, head, list) { 473 if (iter->timestamp < new->timestamp) { 474 list_add(&new->list, &iter->list); 475 return; 476 } 477 } 478 479 list_add(&new->list, head); 480 } 481 482 static void __queue_sample_before(struct sample_queue *new, 483 struct sample_queue *iter, 484 struct list_head *head) 485 { 486 list_for_each_entry_continue_reverse(iter, head, list) { 487 if (iter->timestamp < new->timestamp) { 488 list_add(&new->list, &iter->list); 489 return; 490 } 491 } 492 493 list_add(&new->list, head); 494 } 495 496 static void __queue_sample_after(struct sample_queue *new, 497 struct sample_queue *iter, 498 struct list_head *head) 499 { 500 list_for_each_entry_continue(iter, head, list) { 501 if (iter->timestamp > new->timestamp) { 502 list_add_tail(&new->list, &iter->list); 503 return; 504 } 505 } 506 list_add_tail(&new->list, head); 507 } 508 509 /* The queue is ordered by time */ 510 static void __queue_sample_event(struct sample_queue *new, 511 struct perf_session *s) 512 { 513 struct sample_queue *last_inserted = s->ordered_samples.last_inserted; 514 struct list_head *head = &s->ordered_samples.samples_head; 515 516 517 if (!last_inserted) { 518 __queue_sample_end(new, head); 519 return; 520 } 521 522 /* 523 * Most of the time the current event has a timestamp 524 * very close to the last event inserted, unless we just switched 525 * to another event buffer. Having a sorting based on a list and 526 * on the last inserted event that is close to the current one is 527 * probably more efficient than an rbtree based sorting. 528 */ 529 if (last_inserted->timestamp >= new->timestamp) 530 __queue_sample_before(new, last_inserted, head); 531 else 532 __queue_sample_after(new, last_inserted, head); 533 } 534 535 static int queue_sample_event(event_t *event, struct sample_data *data, 536 struct perf_session *s) 537 { 538 u64 timestamp = data->time; 539 struct sample_queue *new; 540 541 542 if (timestamp < s->ordered_samples.last_flush) { 543 printf("Warning: Timestamp below last timeslice flush\n"); 544 return -EINVAL; 545 } 546 547 new = malloc(sizeof(*new)); 548 if (!new) 549 return -ENOMEM; 550 551 new->timestamp = timestamp; 552 553 new->event = malloc(event->header.size); 554 if (!new->event) { 555 free(new); 556 return -ENOMEM; 557 } 558 559 memcpy(new->event, event, event->header.size); 560 561 __queue_sample_event(new, s); 562 s->ordered_samples.last_inserted = new; 563 564 if (new->timestamp > s->ordered_samples.max_timestamp) 565 s->ordered_samples.max_timestamp = new->timestamp; 566 567 return 0; 568 } 569 570 static int perf_session__process_sample(event_t *event, struct perf_session *s, 571 struct perf_event_ops *ops) 572 { 573 struct sample_data data; 574 575 if (!ops->ordered_samples) 576 return ops->sample(event, s); 577 578 bzero(&data, sizeof(struct sample_data)); 579 event__parse_sample(event, s->sample_type, &data); 580 581 queue_sample_event(event, &data, s); 582 583 return 0; 584 } 585 586 static int perf_session__process_event(struct perf_session *self, 587 event_t *event, 588 struct perf_event_ops *ops, 589 u64 offset, u64 head) 590 { 591 trace_event(event); 592 593 if (event->header.type < PERF_RECORD_HEADER_MAX) { 594 dump_printf("%#Lx [%#x]: PERF_RECORD_%s", 595 offset + head, event->header.size, 596 event__name[event->header.type]); 597 hists__inc_nr_events(&self->hists, event->header.type); 598 } 599 600 if (self->header.needs_swap && event__swap_ops[event->header.type]) 601 event__swap_ops[event->header.type](event); 602 603 switch (event->header.type) { 604 case PERF_RECORD_SAMPLE: 605 return perf_session__process_sample(event, self, ops); 606 case PERF_RECORD_MMAP: 607 return ops->mmap(event, self); 608 case PERF_RECORD_COMM: 609 return ops->comm(event, self); 610 case PERF_RECORD_FORK: 611 return ops->fork(event, self); 612 case PERF_RECORD_EXIT: 613 return ops->exit(event, self); 614 case PERF_RECORD_LOST: 615 return ops->lost(event, self); 616 case PERF_RECORD_READ: 617 return ops->read(event, self); 618 case PERF_RECORD_THROTTLE: 619 return ops->throttle(event, self); 620 case PERF_RECORD_UNTHROTTLE: 621 return ops->unthrottle(event, self); 622 case PERF_RECORD_HEADER_ATTR: 623 return ops->attr(event, self); 624 case PERF_RECORD_HEADER_EVENT_TYPE: 625 return ops->event_type(event, self); 626 case PERF_RECORD_HEADER_TRACING_DATA: 627 /* setup for reading amidst mmap */ 628 lseek(self->fd, offset + head, SEEK_SET); 629 return ops->tracing_data(event, self); 630 case PERF_RECORD_HEADER_BUILD_ID: 631 return ops->build_id(event, self); 632 case PERF_RECORD_FINISHED_ROUND: 633 return ops->finished_round(event, self, ops); 634 default: 635 ++self->hists.stats.nr_unknown_events; 636 return -1; 637 } 638 } 639 640 void perf_event_header__bswap(struct perf_event_header *self) 641 { 642 self->type = bswap_32(self->type); 643 self->misc = bswap_16(self->misc); 644 self->size = bswap_16(self->size); 645 } 646 647 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 648 { 649 struct thread *thread = perf_session__findnew(self, 0); 650 651 if (thread == NULL || thread__set_comm(thread, "swapper")) { 652 pr_err("problem inserting idle task.\n"); 653 thread = NULL; 654 } 655 656 return thread; 657 } 658 659 int do_read(int fd, void *buf, size_t size) 660 { 661 void *buf_start = buf; 662 663 while (size) { 664 int ret = read(fd, buf, size); 665 666 if (ret <= 0) 667 return ret; 668 669 size -= ret; 670 buf += ret; 671 } 672 673 return buf - buf_start; 674 } 675 676 #define session_done() (*(volatile int *)(&session_done)) 677 volatile int session_done; 678 679 static int __perf_session__process_pipe_events(struct perf_session *self, 680 struct perf_event_ops *ops) 681 { 682 event_t event; 683 uint32_t size; 684 int skip = 0; 685 u64 head; 686 int err; 687 void *p; 688 689 perf_event_ops__fill_defaults(ops); 690 691 head = 0; 692 more: 693 err = do_read(self->fd, &event, sizeof(struct perf_event_header)); 694 if (err <= 0) { 695 if (err == 0) 696 goto done; 697 698 pr_err("failed to read event header\n"); 699 goto out_err; 700 } 701 702 if (self->header.needs_swap) 703 perf_event_header__bswap(&event.header); 704 705 size = event.header.size; 706 if (size == 0) 707 size = 8; 708 709 p = &event; 710 p += sizeof(struct perf_event_header); 711 712 if (size - sizeof(struct perf_event_header)) { 713 err = do_read(self->fd, p, 714 size - sizeof(struct perf_event_header)); 715 if (err <= 0) { 716 if (err == 0) { 717 pr_err("unexpected end of event stream\n"); 718 goto done; 719 } 720 721 pr_err("failed to read event data\n"); 722 goto out_err; 723 } 724 } 725 726 if (size == 0 || 727 (skip = perf_session__process_event(self, &event, ops, 728 0, head)) < 0) { 729 dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", 730 head, event.header.size, event.header.type); 731 /* 732 * assume we lost track of the stream, check alignment, and 733 * increment a single u64 in the hope to catch on again 'soon'. 734 */ 735 if (unlikely(head & 7)) 736 head &= ~7ULL; 737 738 size = 8; 739 } 740 741 head += size; 742 743 dump_printf("\n%#Lx [%#x]: event: %d\n", 744 head, event.header.size, event.header.type); 745 746 if (skip > 0) 747 head += skip; 748 749 if (!session_done()) 750 goto more; 751 done: 752 err = 0; 753 out_err: 754 return err; 755 } 756 757 int __perf_session__process_events(struct perf_session *self, 758 u64 data_offset, u64 data_size, 759 u64 file_size, struct perf_event_ops *ops) 760 { 761 int err, mmap_prot, mmap_flags; 762 u64 head, shift; 763 u64 offset = 0; 764 size_t page_size; 765 event_t *event; 766 uint32_t size; 767 char *buf; 768 struct ui_progress *progress = ui_progress__new("Processing events...", 769 self->size); 770 if (progress == NULL) 771 return -1; 772 773 perf_event_ops__fill_defaults(ops); 774 775 page_size = sysconf(_SC_PAGESIZE); 776 777 head = data_offset; 778 shift = page_size * (head / page_size); 779 offset += shift; 780 head -= shift; 781 782 mmap_prot = PROT_READ; 783 mmap_flags = MAP_SHARED; 784 785 if (self->header.needs_swap) { 786 mmap_prot |= PROT_WRITE; 787 mmap_flags = MAP_PRIVATE; 788 } 789 remap: 790 buf = mmap(NULL, page_size * self->mmap_window, mmap_prot, 791 mmap_flags, self->fd, offset); 792 if (buf == MAP_FAILED) { 793 pr_err("failed to mmap file\n"); 794 err = -errno; 795 goto out_err; 796 } 797 798 more: 799 event = (event_t *)(buf + head); 800 ui_progress__update(progress, offset); 801 802 if (self->header.needs_swap) 803 perf_event_header__bswap(&event->header); 804 size = event->header.size; 805 if (size == 0) 806 size = 8; 807 808 if (head + event->header.size >= page_size * self->mmap_window) { 809 int munmap_ret; 810 811 shift = page_size * (head / page_size); 812 813 munmap_ret = munmap(buf, page_size * self->mmap_window); 814 assert(munmap_ret == 0); 815 816 offset += shift; 817 head -= shift; 818 goto remap; 819 } 820 821 size = event->header.size; 822 823 dump_printf("\n%#Lx [%#x]: event: %d\n", 824 offset + head, event->header.size, event->header.type); 825 826 if (size == 0 || 827 perf_session__process_event(self, event, ops, offset, head) < 0) { 828 dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n", 829 offset + head, event->header.size, 830 event->header.type); 831 /* 832 * assume we lost track of the stream, check alignment, and 833 * increment a single u64 in the hope to catch on again 'soon'. 834 */ 835 if (unlikely(head & 7)) 836 head &= ~7ULL; 837 838 size = 8; 839 } 840 841 head += size; 842 843 if (offset + head >= data_offset + data_size) 844 goto done; 845 846 if (offset + head < file_size) 847 goto more; 848 done: 849 err = 0; 850 /* do the final flush for ordered samples */ 851 self->ordered_samples.next_flush = ULLONG_MAX; 852 flush_sample_queue(self, ops); 853 out_err: 854 ui_progress__delete(progress); 855 return err; 856 } 857 858 int perf_session__process_events(struct perf_session *self, 859 struct perf_event_ops *ops) 860 { 861 int err; 862 863 if (perf_session__register_idle_thread(self) == NULL) 864 return -ENOMEM; 865 866 if (!self->fd_pipe) 867 err = __perf_session__process_events(self, 868 self->header.data_offset, 869 self->header.data_size, 870 self->size, ops); 871 else 872 err = __perf_session__process_pipe_events(self, ops); 873 874 return err; 875 } 876 877 bool perf_session__has_traces(struct perf_session *self, const char *msg) 878 { 879 if (!(self->sample_type & PERF_SAMPLE_RAW)) { 880 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 881 return false; 882 } 883 884 return true; 885 } 886 887 int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps, 888 const char *symbol_name, 889 u64 addr) 890 { 891 char *bracket; 892 enum map_type i; 893 struct ref_reloc_sym *ref; 894 895 ref = zalloc(sizeof(struct ref_reloc_sym)); 896 if (ref == NULL) 897 return -ENOMEM; 898 899 ref->name = strdup(symbol_name); 900 if (ref->name == NULL) { 901 free(ref); 902 return -ENOMEM; 903 } 904 905 bracket = strchr(ref->name, ']'); 906 if (bracket) 907 *bracket = '\0'; 908 909 ref->addr = addr; 910 911 for (i = 0; i < MAP__NR_TYPES; ++i) { 912 struct kmap *kmap = map__kmap(maps[i]); 913 kmap->ref_reloc_sym = ref; 914 } 915 916 return 0; 917 } 918 919 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 920 { 921 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + 922 __dsos__fprintf(&self->host_machine.user_dsos, fp) + 923 machines__fprintf_dsos(&self->machines, fp); 924 } 925 926 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 927 bool with_hits) 928 { 929 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); 930 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); 931 } 932