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