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