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