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 "evlist.h" 11 #include "evsel.h" 12 #include "session.h" 13 #include "tool.h" 14 #include "sort.h" 15 #include "util.h" 16 #include "cpumap.h" 17 18 static int perf_session__open(struct perf_session *self, bool force) 19 { 20 struct stat input_stat; 21 22 if (!strcmp(self->filename, "-")) { 23 self->fd_pipe = true; 24 self->fd = STDIN_FILENO; 25 26 if (perf_session__read_header(self, self->fd) < 0) 27 pr_err("incompatible file format (rerun with -v to learn more)"); 28 29 return 0; 30 } 31 32 self->fd = open(self->filename, O_RDONLY); 33 if (self->fd < 0) { 34 int err = errno; 35 36 pr_err("failed to open %s: %s", self->filename, strerror(err)); 37 if (err == ENOENT && !strcmp(self->filename, "perf.data")) 38 pr_err(" (try 'perf record' first)"); 39 pr_err("\n"); 40 return -errno; 41 } 42 43 if (fstat(self->fd, &input_stat) < 0) 44 goto out_close; 45 46 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { 47 pr_err("file %s not owned by current user or root\n", 48 self->filename); 49 goto out_close; 50 } 51 52 if (!input_stat.st_size) { 53 pr_info("zero-sized file (%s), nothing to do!\n", 54 self->filename); 55 goto out_close; 56 } 57 58 if (perf_session__read_header(self, self->fd) < 0) { 59 pr_err("incompatible file format (rerun with -v to learn more)"); 60 goto out_close; 61 } 62 63 if (!perf_evlist__valid_sample_type(self->evlist)) { 64 pr_err("non matching sample_type"); 65 goto out_close; 66 } 67 68 if (!perf_evlist__valid_sample_id_all(self->evlist)) { 69 pr_err("non matching sample_id_all"); 70 goto out_close; 71 } 72 73 self->size = input_stat.st_size; 74 return 0; 75 76 out_close: 77 close(self->fd); 78 self->fd = -1; 79 return -1; 80 } 81 82 void perf_session__update_sample_type(struct perf_session *self) 83 { 84 self->sample_type = perf_evlist__sample_type(self->evlist); 85 self->sample_size = __perf_evsel__sample_size(self->sample_type); 86 self->sample_id_all = perf_evlist__sample_id_all(self->evlist); 87 self->id_hdr_size = perf_evlist__id_hdr_size(self->evlist); 88 self->host_machine.id_hdr_size = self->id_hdr_size; 89 } 90 91 int perf_session__create_kernel_maps(struct perf_session *self) 92 { 93 int ret = machine__create_kernel_maps(&self->host_machine); 94 95 if (ret >= 0) 96 ret = machines__create_guest_kernel_maps(&self->machines); 97 return ret; 98 } 99 100 static void perf_session__destroy_kernel_maps(struct perf_session *self) 101 { 102 machine__destroy_kernel_maps(&self->host_machine); 103 machines__destroy_guest_kernel_maps(&self->machines); 104 } 105 106 struct perf_session *perf_session__new(const char *filename, int mode, 107 bool force, bool repipe, 108 struct perf_tool *tool) 109 { 110 struct perf_session *self; 111 struct stat st; 112 size_t len; 113 114 if (!filename || !strlen(filename)) { 115 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) 116 filename = "-"; 117 else 118 filename = "perf.data"; 119 } 120 121 len = strlen(filename); 122 self = zalloc(sizeof(*self) + len); 123 124 if (self == NULL) 125 goto out; 126 127 memcpy(self->filename, filename, len); 128 /* 129 * On 64bit we can mmap the data file in one go. No need for tiny mmap 130 * slices. On 32bit we use 32MB. 131 */ 132 #if BITS_PER_LONG == 64 133 self->mmap_window = ULLONG_MAX; 134 #else 135 self->mmap_window = 32 * 1024 * 1024ULL; 136 #endif 137 self->machines = RB_ROOT; 138 self->repipe = repipe; 139 INIT_LIST_HEAD(&self->ordered_samples.samples); 140 INIT_LIST_HEAD(&self->ordered_samples.sample_cache); 141 INIT_LIST_HEAD(&self->ordered_samples.to_free); 142 machine__init(&self->host_machine, "", HOST_KERNEL_ID); 143 hists__init(&self->hists); 144 145 if (mode == O_RDONLY) { 146 if (perf_session__open(self, force) < 0) 147 goto out_delete; 148 perf_session__update_sample_type(self); 149 } else if (mode == O_WRONLY) { 150 /* 151 * In O_RDONLY mode this will be performed when reading the 152 * kernel MMAP event, in perf_event__process_mmap(). 153 */ 154 if (perf_session__create_kernel_maps(self) < 0) 155 goto out_delete; 156 } 157 158 if (tool && tool->ordering_requires_timestamps && 159 tool->ordered_samples && !self->sample_id_all) { 160 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 161 tool->ordered_samples = false; 162 } 163 164 out: 165 return self; 166 out_delete: 167 perf_session__delete(self); 168 return NULL; 169 } 170 171 static void machine__delete_dead_threads(struct machine *machine) 172 { 173 struct thread *n, *t; 174 175 list_for_each_entry_safe(t, n, &machine->dead_threads, node) { 176 list_del(&t->node); 177 thread__delete(t); 178 } 179 } 180 181 static void perf_session__delete_dead_threads(struct perf_session *session) 182 { 183 machine__delete_dead_threads(&session->host_machine); 184 } 185 186 static void machine__delete_threads(struct machine *self) 187 { 188 struct rb_node *nd = rb_first(&self->threads); 189 190 while (nd) { 191 struct thread *t = rb_entry(nd, struct thread, rb_node); 192 193 rb_erase(&t->rb_node, &self->threads); 194 nd = rb_next(nd); 195 thread__delete(t); 196 } 197 } 198 199 static void perf_session__delete_threads(struct perf_session *session) 200 { 201 machine__delete_threads(&session->host_machine); 202 } 203 204 void perf_session__delete(struct perf_session *self) 205 { 206 perf_session__destroy_kernel_maps(self); 207 perf_session__delete_dead_threads(self); 208 perf_session__delete_threads(self); 209 machine__exit(&self->host_machine); 210 close(self->fd); 211 free(self); 212 } 213 214 void machine__remove_thread(struct machine *self, struct thread *th) 215 { 216 self->last_match = NULL; 217 rb_erase(&th->rb_node, &self->threads); 218 /* 219 * We may have references to this thread, for instance in some hist_entry 220 * instances, so just move them to a separate list. 221 */ 222 list_add_tail(&th->node, &self->dead_threads); 223 } 224 225 static bool symbol__match_parent_regex(struct symbol *sym) 226 { 227 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0)) 228 return 1; 229 230 return 0; 231 } 232 233 static const u8 cpumodes[] = { 234 PERF_RECORD_MISC_USER, 235 PERF_RECORD_MISC_KERNEL, 236 PERF_RECORD_MISC_GUEST_USER, 237 PERF_RECORD_MISC_GUEST_KERNEL 238 }; 239 #define NCPUMODES (sizeof(cpumodes)/sizeof(u8)) 240 241 static void ip__resolve_ams(struct machine *self, struct thread *thread, 242 struct addr_map_symbol *ams, 243 u64 ip) 244 { 245 struct addr_location al; 246 size_t i; 247 u8 m; 248 249 memset(&al, 0, sizeof(al)); 250 251 for (i = 0; i < NCPUMODES; i++) { 252 m = cpumodes[i]; 253 /* 254 * We cannot use the header.misc hint to determine whether a 255 * branch stack address is user, kernel, guest, hypervisor. 256 * Branches may straddle the kernel/user/hypervisor boundaries. 257 * Thus, we have to try consecutively until we find a match 258 * or else, the symbol is unknown 259 */ 260 thread__find_addr_location(thread, self, m, MAP__FUNCTION, 261 ip, &al, NULL); 262 if (al.sym) 263 goto found; 264 } 265 found: 266 ams->addr = ip; 267 ams->al_addr = al.addr; 268 ams->sym = al.sym; 269 ams->map = al.map; 270 } 271 272 struct branch_info *machine__resolve_bstack(struct machine *self, 273 struct thread *thr, 274 struct branch_stack *bs) 275 { 276 struct branch_info *bi; 277 unsigned int i; 278 279 bi = calloc(bs->nr, sizeof(struct branch_info)); 280 if (!bi) 281 return NULL; 282 283 for (i = 0; i < bs->nr; i++) { 284 ip__resolve_ams(self, thr, &bi[i].to, bs->entries[i].to); 285 ip__resolve_ams(self, thr, &bi[i].from, bs->entries[i].from); 286 bi[i].flags = bs->entries[i].flags; 287 } 288 return bi; 289 } 290 291 int machine__resolve_callchain(struct machine *self, 292 struct perf_evsel *evsel __used, 293 struct thread *thread, 294 struct ip_callchain *chain, 295 struct symbol **parent) 296 { 297 u8 cpumode = PERF_RECORD_MISC_USER; 298 unsigned int i; 299 int err; 300 301 callchain_cursor_reset(&callchain_cursor); 302 303 if (chain->nr > PERF_MAX_STACK_DEPTH) { 304 pr_warning("corrupted callchain. skipping...\n"); 305 return 0; 306 } 307 308 for (i = 0; i < chain->nr; i++) { 309 u64 ip; 310 struct addr_location al; 311 312 if (callchain_param.order == ORDER_CALLEE) 313 ip = chain->ips[i]; 314 else 315 ip = chain->ips[chain->nr - i - 1]; 316 317 if (ip >= PERF_CONTEXT_MAX) { 318 switch (ip) { 319 case PERF_CONTEXT_HV: 320 cpumode = PERF_RECORD_MISC_HYPERVISOR; break; 321 case PERF_CONTEXT_KERNEL: 322 cpumode = PERF_RECORD_MISC_KERNEL; break; 323 case PERF_CONTEXT_USER: 324 cpumode = PERF_RECORD_MISC_USER; break; 325 default: 326 pr_debug("invalid callchain context: " 327 "%"PRId64"\n", (s64) ip); 328 /* 329 * It seems the callchain is corrupted. 330 * Discard all. 331 */ 332 callchain_cursor_reset(&callchain_cursor); 333 return 0; 334 } 335 continue; 336 } 337 338 al.filtered = false; 339 thread__find_addr_location(thread, self, cpumode, 340 MAP__FUNCTION, ip, &al, NULL); 341 if (al.sym != NULL) { 342 if (sort__has_parent && !*parent && 343 symbol__match_parent_regex(al.sym)) 344 *parent = al.sym; 345 if (!symbol_conf.use_callchain) 346 break; 347 } 348 349 err = callchain_cursor_append(&callchain_cursor, 350 ip, al.map, al.sym); 351 if (err) 352 return err; 353 } 354 355 return 0; 356 } 357 358 static int process_event_synth_tracing_data_stub(union perf_event *event __used, 359 struct perf_session *session __used) 360 { 361 dump_printf(": unhandled!\n"); 362 return 0; 363 } 364 365 static int process_event_synth_attr_stub(union perf_event *event __used, 366 struct perf_evlist **pevlist __used) 367 { 368 dump_printf(": unhandled!\n"); 369 return 0; 370 } 371 372 static int process_event_sample_stub(struct perf_tool *tool __used, 373 union perf_event *event __used, 374 struct perf_sample *sample __used, 375 struct perf_evsel *evsel __used, 376 struct machine *machine __used) 377 { 378 dump_printf(": unhandled!\n"); 379 return 0; 380 } 381 382 static int process_event_stub(struct perf_tool *tool __used, 383 union perf_event *event __used, 384 struct perf_sample *sample __used, 385 struct machine *machine __used) 386 { 387 dump_printf(": unhandled!\n"); 388 return 0; 389 } 390 391 static int process_finished_round_stub(struct perf_tool *tool __used, 392 union perf_event *event __used, 393 struct perf_session *perf_session __used) 394 { 395 dump_printf(": unhandled!\n"); 396 return 0; 397 } 398 399 static int process_event_type_stub(struct perf_tool *tool __used, 400 union perf_event *event __used) 401 { 402 dump_printf(": unhandled!\n"); 403 return 0; 404 } 405 406 static int process_finished_round(struct perf_tool *tool, 407 union perf_event *event, 408 struct perf_session *session); 409 410 static void perf_tool__fill_defaults(struct perf_tool *tool) 411 { 412 if (tool->sample == NULL) 413 tool->sample = process_event_sample_stub; 414 if (tool->mmap == NULL) 415 tool->mmap = process_event_stub; 416 if (tool->comm == NULL) 417 tool->comm = process_event_stub; 418 if (tool->fork == NULL) 419 tool->fork = process_event_stub; 420 if (tool->exit == NULL) 421 tool->exit = process_event_stub; 422 if (tool->lost == NULL) 423 tool->lost = perf_event__process_lost; 424 if (tool->read == NULL) 425 tool->read = process_event_sample_stub; 426 if (tool->throttle == NULL) 427 tool->throttle = process_event_stub; 428 if (tool->unthrottle == NULL) 429 tool->unthrottle = process_event_stub; 430 if (tool->attr == NULL) 431 tool->attr = process_event_synth_attr_stub; 432 if (tool->event_type == NULL) 433 tool->event_type = process_event_type_stub; 434 if (tool->tracing_data == NULL) 435 tool->tracing_data = process_event_synth_tracing_data_stub; 436 if (tool->build_id == NULL) 437 tool->build_id = process_finished_round_stub; 438 if (tool->finished_round == NULL) { 439 if (tool->ordered_samples) 440 tool->finished_round = process_finished_round; 441 else 442 tool->finished_round = process_finished_round_stub; 443 } 444 } 445 446 void mem_bswap_64(void *src, int byte_size) 447 { 448 u64 *m = src; 449 450 while (byte_size > 0) { 451 *m = bswap_64(*m); 452 byte_size -= sizeof(u64); 453 ++m; 454 } 455 } 456 457 static void perf_event__all64_swap(union perf_event *event) 458 { 459 struct perf_event_header *hdr = &event->header; 460 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 461 } 462 463 static void perf_event__comm_swap(union perf_event *event) 464 { 465 event->comm.pid = bswap_32(event->comm.pid); 466 event->comm.tid = bswap_32(event->comm.tid); 467 } 468 469 static void perf_event__mmap_swap(union perf_event *event) 470 { 471 event->mmap.pid = bswap_32(event->mmap.pid); 472 event->mmap.tid = bswap_32(event->mmap.tid); 473 event->mmap.start = bswap_64(event->mmap.start); 474 event->mmap.len = bswap_64(event->mmap.len); 475 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 476 } 477 478 static void perf_event__task_swap(union perf_event *event) 479 { 480 event->fork.pid = bswap_32(event->fork.pid); 481 event->fork.tid = bswap_32(event->fork.tid); 482 event->fork.ppid = bswap_32(event->fork.ppid); 483 event->fork.ptid = bswap_32(event->fork.ptid); 484 event->fork.time = bswap_64(event->fork.time); 485 } 486 487 static void perf_event__read_swap(union perf_event *event) 488 { 489 event->read.pid = bswap_32(event->read.pid); 490 event->read.tid = bswap_32(event->read.tid); 491 event->read.value = bswap_64(event->read.value); 492 event->read.time_enabled = bswap_64(event->read.time_enabled); 493 event->read.time_running = bswap_64(event->read.time_running); 494 event->read.id = bswap_64(event->read.id); 495 } 496 497 static u8 revbyte(u8 b) 498 { 499 int rev = (b >> 4) | ((b & 0xf) << 4); 500 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 501 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 502 return (u8) rev; 503 } 504 505 /* 506 * XXX this is hack in attempt to carry flags bitfield 507 * throught endian village. ABI says: 508 * 509 * Bit-fields are allocated from right to left (least to most significant) 510 * on little-endian implementations and from left to right (most to least 511 * significant) on big-endian implementations. 512 * 513 * The above seems to be byte specific, so we need to reverse each 514 * byte of the bitfield. 'Internet' also says this might be implementation 515 * specific and we probably need proper fix and carry perf_event_attr 516 * bitfield flags in separate data file FEAT_ section. Thought this seems 517 * to work for now. 518 */ 519 static void swap_bitfield(u8 *p, unsigned len) 520 { 521 unsigned i; 522 523 for (i = 0; i < len; i++) { 524 *p = revbyte(*p); 525 p++; 526 } 527 } 528 529 /* exported for swapping attributes in file header */ 530 void perf_event__attr_swap(struct perf_event_attr *attr) 531 { 532 attr->type = bswap_32(attr->type); 533 attr->size = bswap_32(attr->size); 534 attr->config = bswap_64(attr->config); 535 attr->sample_period = bswap_64(attr->sample_period); 536 attr->sample_type = bswap_64(attr->sample_type); 537 attr->read_format = bswap_64(attr->read_format); 538 attr->wakeup_events = bswap_32(attr->wakeup_events); 539 attr->bp_type = bswap_32(attr->bp_type); 540 attr->bp_addr = bswap_64(attr->bp_addr); 541 attr->bp_len = bswap_64(attr->bp_len); 542 543 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 544 } 545 546 static void perf_event__hdr_attr_swap(union perf_event *event) 547 { 548 size_t size; 549 550 perf_event__attr_swap(&event->attr.attr); 551 552 size = event->header.size; 553 size -= (void *)&event->attr.id - (void *)event; 554 mem_bswap_64(event->attr.id, size); 555 } 556 557 static void perf_event__event_type_swap(union perf_event *event) 558 { 559 event->event_type.event_type.event_id = 560 bswap_64(event->event_type.event_type.event_id); 561 } 562 563 static void perf_event__tracing_data_swap(union perf_event *event) 564 { 565 event->tracing_data.size = bswap_32(event->tracing_data.size); 566 } 567 568 typedef void (*perf_event__swap_op)(union perf_event *event); 569 570 static perf_event__swap_op perf_event__swap_ops[] = { 571 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 572 [PERF_RECORD_COMM] = perf_event__comm_swap, 573 [PERF_RECORD_FORK] = perf_event__task_swap, 574 [PERF_RECORD_EXIT] = perf_event__task_swap, 575 [PERF_RECORD_LOST] = perf_event__all64_swap, 576 [PERF_RECORD_READ] = perf_event__read_swap, 577 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 578 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 579 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 580 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 581 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 582 [PERF_RECORD_HEADER_MAX] = NULL, 583 }; 584 585 struct sample_queue { 586 u64 timestamp; 587 u64 file_offset; 588 union perf_event *event; 589 struct list_head list; 590 }; 591 592 static void perf_session_free_sample_buffers(struct perf_session *session) 593 { 594 struct ordered_samples *os = &session->ordered_samples; 595 596 while (!list_empty(&os->to_free)) { 597 struct sample_queue *sq; 598 599 sq = list_entry(os->to_free.next, struct sample_queue, list); 600 list_del(&sq->list); 601 free(sq); 602 } 603 } 604 605 static int perf_session_deliver_event(struct perf_session *session, 606 union perf_event *event, 607 struct perf_sample *sample, 608 struct perf_tool *tool, 609 u64 file_offset); 610 611 static void flush_sample_queue(struct perf_session *s, 612 struct perf_tool *tool) 613 { 614 struct ordered_samples *os = &s->ordered_samples; 615 struct list_head *head = &os->samples; 616 struct sample_queue *tmp, *iter; 617 struct perf_sample sample; 618 u64 limit = os->next_flush; 619 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL; 620 unsigned idx = 0, progress_next = os->nr_samples / 16; 621 int ret; 622 623 if (!tool->ordered_samples || !limit) 624 return; 625 626 list_for_each_entry_safe(iter, tmp, head, list) { 627 if (iter->timestamp > limit) 628 break; 629 630 ret = perf_session__parse_sample(s, iter->event, &sample); 631 if (ret) 632 pr_err("Can't parse sample, err = %d\n", ret); 633 else 634 perf_session_deliver_event(s, iter->event, &sample, tool, 635 iter->file_offset); 636 637 os->last_flush = iter->timestamp; 638 list_del(&iter->list); 639 list_add(&iter->list, &os->sample_cache); 640 if (++idx >= progress_next) { 641 progress_next += os->nr_samples / 16; 642 ui_progress__update(idx, os->nr_samples, 643 "Processing time ordered events..."); 644 } 645 } 646 647 if (list_empty(head)) { 648 os->last_sample = NULL; 649 } else if (last_ts <= limit) { 650 os->last_sample = 651 list_entry(head->prev, struct sample_queue, list); 652 } 653 654 os->nr_samples = 0; 655 } 656 657 /* 658 * When perf record finishes a pass on every buffers, it records this pseudo 659 * event. 660 * We record the max timestamp t found in the pass n. 661 * Assuming these timestamps are monotonic across cpus, we know that if 662 * a buffer still has events with timestamps below t, they will be all 663 * available and then read in the pass n + 1. 664 * Hence when we start to read the pass n + 2, we can safely flush every 665 * events with timestamps below t. 666 * 667 * ============ PASS n ================= 668 * CPU 0 | CPU 1 669 * | 670 * cnt1 timestamps | cnt2 timestamps 671 * 1 | 2 672 * 2 | 3 673 * - | 4 <--- max recorded 674 * 675 * ============ PASS n + 1 ============== 676 * CPU 0 | CPU 1 677 * | 678 * cnt1 timestamps | cnt2 timestamps 679 * 3 | 5 680 * 4 | 6 681 * 5 | 7 <---- max recorded 682 * 683 * Flush every events below timestamp 4 684 * 685 * ============ PASS n + 2 ============== 686 * CPU 0 | CPU 1 687 * | 688 * cnt1 timestamps | cnt2 timestamps 689 * 6 | 8 690 * 7 | 9 691 * - | 10 692 * 693 * Flush every events below timestamp 7 694 * etc... 695 */ 696 static int process_finished_round(struct perf_tool *tool, 697 union perf_event *event __used, 698 struct perf_session *session) 699 { 700 flush_sample_queue(session, tool); 701 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp; 702 703 return 0; 704 } 705 706 /* The queue is ordered by time */ 707 static void __queue_event(struct sample_queue *new, struct perf_session *s) 708 { 709 struct ordered_samples *os = &s->ordered_samples; 710 struct sample_queue *sample = os->last_sample; 711 u64 timestamp = new->timestamp; 712 struct list_head *p; 713 714 ++os->nr_samples; 715 os->last_sample = new; 716 717 if (!sample) { 718 list_add(&new->list, &os->samples); 719 os->max_timestamp = timestamp; 720 return; 721 } 722 723 /* 724 * last_sample might point to some random place in the list as it's 725 * the last queued event. We expect that the new event is close to 726 * this. 727 */ 728 if (sample->timestamp <= timestamp) { 729 while (sample->timestamp <= timestamp) { 730 p = sample->list.next; 731 if (p == &os->samples) { 732 list_add_tail(&new->list, &os->samples); 733 os->max_timestamp = timestamp; 734 return; 735 } 736 sample = list_entry(p, struct sample_queue, list); 737 } 738 list_add_tail(&new->list, &sample->list); 739 } else { 740 while (sample->timestamp > timestamp) { 741 p = sample->list.prev; 742 if (p == &os->samples) { 743 list_add(&new->list, &os->samples); 744 return; 745 } 746 sample = list_entry(p, struct sample_queue, list); 747 } 748 list_add(&new->list, &sample->list); 749 } 750 } 751 752 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue)) 753 754 static int perf_session_queue_event(struct perf_session *s, union perf_event *event, 755 struct perf_sample *sample, u64 file_offset) 756 { 757 struct ordered_samples *os = &s->ordered_samples; 758 struct list_head *sc = &os->sample_cache; 759 u64 timestamp = sample->time; 760 struct sample_queue *new; 761 762 if (!timestamp || timestamp == ~0ULL) 763 return -ETIME; 764 765 if (timestamp < s->ordered_samples.last_flush) { 766 printf("Warning: Timestamp below last timeslice flush\n"); 767 return -EINVAL; 768 } 769 770 if (!list_empty(sc)) { 771 new = list_entry(sc->next, struct sample_queue, list); 772 list_del(&new->list); 773 } else if (os->sample_buffer) { 774 new = os->sample_buffer + os->sample_buffer_idx; 775 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER) 776 os->sample_buffer = NULL; 777 } else { 778 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new)); 779 if (!os->sample_buffer) 780 return -ENOMEM; 781 list_add(&os->sample_buffer->list, &os->to_free); 782 os->sample_buffer_idx = 2; 783 new = os->sample_buffer + 1; 784 } 785 786 new->timestamp = timestamp; 787 new->file_offset = file_offset; 788 new->event = event; 789 790 __queue_event(new, s); 791 792 return 0; 793 } 794 795 static void callchain__printf(struct perf_sample *sample) 796 { 797 unsigned int i; 798 799 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr); 800 801 for (i = 0; i < sample->callchain->nr; i++) 802 printf("..... %2d: %016" PRIx64 "\n", 803 i, sample->callchain->ips[i]); 804 } 805 806 static void branch_stack__printf(struct perf_sample *sample) 807 { 808 uint64_t i; 809 810 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 811 812 for (i = 0; i < sample->branch_stack->nr; i++) 813 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 814 i, sample->branch_stack->entries[i].from, 815 sample->branch_stack->entries[i].to); 816 } 817 818 static void perf_session__print_tstamp(struct perf_session *session, 819 union perf_event *event, 820 struct perf_sample *sample) 821 { 822 if (event->header.type != PERF_RECORD_SAMPLE && 823 !session->sample_id_all) { 824 fputs("-1 -1 ", stdout); 825 return; 826 } 827 828 if ((session->sample_type & PERF_SAMPLE_CPU)) 829 printf("%u ", sample->cpu); 830 831 if (session->sample_type & PERF_SAMPLE_TIME) 832 printf("%" PRIu64 " ", sample->time); 833 } 834 835 static void dump_event(struct perf_session *session, union perf_event *event, 836 u64 file_offset, struct perf_sample *sample) 837 { 838 if (!dump_trace) 839 return; 840 841 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 842 file_offset, event->header.size, event->header.type); 843 844 trace_event(event); 845 846 if (sample) 847 perf_session__print_tstamp(session, event, sample); 848 849 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 850 event->header.size, perf_event__name(event->header.type)); 851 } 852 853 static void dump_sample(struct perf_session *session, union perf_event *event, 854 struct perf_sample *sample) 855 { 856 if (!dump_trace) 857 return; 858 859 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 860 event->header.misc, sample->pid, sample->tid, sample->ip, 861 sample->period, sample->addr); 862 863 if (session->sample_type & PERF_SAMPLE_CALLCHAIN) 864 callchain__printf(sample); 865 866 if (session->sample_type & PERF_SAMPLE_BRANCH_STACK) 867 branch_stack__printf(sample); 868 } 869 870 static struct machine * 871 perf_session__find_machine_for_cpumode(struct perf_session *session, 872 union perf_event *event) 873 { 874 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 875 876 if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { 877 u32 pid; 878 879 if (event->header.type == PERF_RECORD_MMAP) 880 pid = event->mmap.pid; 881 else 882 pid = event->ip.pid; 883 884 return perf_session__find_machine(session, pid); 885 } 886 887 return perf_session__find_host_machine(session); 888 } 889 890 static int perf_session_deliver_event(struct perf_session *session, 891 union perf_event *event, 892 struct perf_sample *sample, 893 struct perf_tool *tool, 894 u64 file_offset) 895 { 896 struct perf_evsel *evsel; 897 struct machine *machine; 898 899 dump_event(session, event, file_offset, sample); 900 901 evsel = perf_evlist__id2evsel(session->evlist, sample->id); 902 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) { 903 /* 904 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here 905 * because the tools right now may apply filters, discarding 906 * some of the samples. For consistency, in the future we 907 * should have something like nr_filtered_samples and remove 908 * the sample->period from total_sample_period, etc, KISS for 909 * now tho. 910 * 911 * Also testing against NULL allows us to handle files without 912 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the 913 * future probably it'll be a good idea to restrict event 914 * processing via perf_session to files with both set. 915 */ 916 hists__inc_nr_events(&evsel->hists, event->header.type); 917 } 918 919 machine = perf_session__find_machine_for_cpumode(session, event); 920 921 switch (event->header.type) { 922 case PERF_RECORD_SAMPLE: 923 dump_sample(session, event, sample); 924 if (evsel == NULL) { 925 ++session->hists.stats.nr_unknown_id; 926 return 0; 927 } 928 if (machine == NULL) { 929 ++session->hists.stats.nr_unprocessable_samples; 930 return 0; 931 } 932 return tool->sample(tool, event, sample, evsel, machine); 933 case PERF_RECORD_MMAP: 934 return tool->mmap(tool, event, sample, machine); 935 case PERF_RECORD_COMM: 936 return tool->comm(tool, event, sample, machine); 937 case PERF_RECORD_FORK: 938 return tool->fork(tool, event, sample, machine); 939 case PERF_RECORD_EXIT: 940 return tool->exit(tool, event, sample, machine); 941 case PERF_RECORD_LOST: 942 if (tool->lost == perf_event__process_lost) 943 session->hists.stats.total_lost += event->lost.lost; 944 return tool->lost(tool, event, sample, machine); 945 case PERF_RECORD_READ: 946 return tool->read(tool, event, sample, evsel, machine); 947 case PERF_RECORD_THROTTLE: 948 return tool->throttle(tool, event, sample, machine); 949 case PERF_RECORD_UNTHROTTLE: 950 return tool->unthrottle(tool, event, sample, machine); 951 default: 952 ++session->hists.stats.nr_unknown_events; 953 return -1; 954 } 955 } 956 957 static int perf_session__preprocess_sample(struct perf_session *session, 958 union perf_event *event, struct perf_sample *sample) 959 { 960 if (event->header.type != PERF_RECORD_SAMPLE || 961 !(session->sample_type & PERF_SAMPLE_CALLCHAIN)) 962 return 0; 963 964 if (!ip_callchain__valid(sample->callchain, event)) { 965 pr_debug("call-chain problem with event, skipping it.\n"); 966 ++session->hists.stats.nr_invalid_chains; 967 session->hists.stats.total_invalid_chains += sample->period; 968 return -EINVAL; 969 } 970 return 0; 971 } 972 973 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event, 974 struct perf_tool *tool, u64 file_offset) 975 { 976 int err; 977 978 dump_event(session, event, file_offset, NULL); 979 980 /* These events are processed right away */ 981 switch (event->header.type) { 982 case PERF_RECORD_HEADER_ATTR: 983 err = tool->attr(event, &session->evlist); 984 if (err == 0) 985 perf_session__update_sample_type(session); 986 return err; 987 case PERF_RECORD_HEADER_EVENT_TYPE: 988 return tool->event_type(tool, event); 989 case PERF_RECORD_HEADER_TRACING_DATA: 990 /* setup for reading amidst mmap */ 991 lseek(session->fd, file_offset, SEEK_SET); 992 return tool->tracing_data(event, session); 993 case PERF_RECORD_HEADER_BUILD_ID: 994 return tool->build_id(tool, event, session); 995 case PERF_RECORD_FINISHED_ROUND: 996 return tool->finished_round(tool, event, session); 997 default: 998 return -EINVAL; 999 } 1000 } 1001 1002 static int perf_session__process_event(struct perf_session *session, 1003 union perf_event *event, 1004 struct perf_tool *tool, 1005 u64 file_offset) 1006 { 1007 struct perf_sample sample; 1008 int ret; 1009 1010 if (session->header.needs_swap && 1011 perf_event__swap_ops[event->header.type]) 1012 perf_event__swap_ops[event->header.type](event); 1013 1014 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1015 return -EINVAL; 1016 1017 hists__inc_nr_events(&session->hists, event->header.type); 1018 1019 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1020 return perf_session__process_user_event(session, event, tool, file_offset); 1021 1022 /* 1023 * For all kernel events we get the sample data 1024 */ 1025 ret = perf_session__parse_sample(session, event, &sample); 1026 if (ret) 1027 return ret; 1028 1029 /* Preprocess sample records - precheck callchains */ 1030 if (perf_session__preprocess_sample(session, event, &sample)) 1031 return 0; 1032 1033 if (tool->ordered_samples) { 1034 ret = perf_session_queue_event(session, event, &sample, 1035 file_offset); 1036 if (ret != -ETIME) 1037 return ret; 1038 } 1039 1040 return perf_session_deliver_event(session, event, &sample, tool, 1041 file_offset); 1042 } 1043 1044 void perf_event_header__bswap(struct perf_event_header *self) 1045 { 1046 self->type = bswap_32(self->type); 1047 self->misc = bswap_16(self->misc); 1048 self->size = bswap_16(self->size); 1049 } 1050 1051 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1052 { 1053 return machine__findnew_thread(&session->host_machine, pid); 1054 } 1055 1056 static struct thread *perf_session__register_idle_thread(struct perf_session *self) 1057 { 1058 struct thread *thread = perf_session__findnew(self, 0); 1059 1060 if (thread == NULL || thread__set_comm(thread, "swapper")) { 1061 pr_err("problem inserting idle task.\n"); 1062 thread = NULL; 1063 } 1064 1065 return thread; 1066 } 1067 1068 static void perf_session__warn_about_errors(const struct perf_session *session, 1069 const struct perf_tool *tool) 1070 { 1071 if (tool->lost == perf_event__process_lost && 1072 session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) { 1073 ui__warning("Processed %d events and lost %d chunks!\n\n" 1074 "Check IO/CPU overload!\n\n", 1075 session->hists.stats.nr_events[0], 1076 session->hists.stats.nr_events[PERF_RECORD_LOST]); 1077 } 1078 1079 if (session->hists.stats.nr_unknown_events != 0) { 1080 ui__warning("Found %u unknown events!\n\n" 1081 "Is this an older tool processing a perf.data " 1082 "file generated by a more recent tool?\n\n" 1083 "If that is not the case, consider " 1084 "reporting to linux-kernel@vger.kernel.org.\n\n", 1085 session->hists.stats.nr_unknown_events); 1086 } 1087 1088 if (session->hists.stats.nr_unknown_id != 0) { 1089 ui__warning("%u samples with id not present in the header\n", 1090 session->hists.stats.nr_unknown_id); 1091 } 1092 1093 if (session->hists.stats.nr_invalid_chains != 0) { 1094 ui__warning("Found invalid callchains!\n\n" 1095 "%u out of %u events were discarded for this reason.\n\n" 1096 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1097 session->hists.stats.nr_invalid_chains, 1098 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]); 1099 } 1100 1101 if (session->hists.stats.nr_unprocessable_samples != 0) { 1102 ui__warning("%u unprocessable samples recorded.\n" 1103 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1104 session->hists.stats.nr_unprocessable_samples); 1105 } 1106 } 1107 1108 #define session_done() (*(volatile int *)(&session_done)) 1109 volatile int session_done; 1110 1111 static int __perf_session__process_pipe_events(struct perf_session *self, 1112 struct perf_tool *tool) 1113 { 1114 union perf_event *event; 1115 uint32_t size, cur_size = 0; 1116 void *buf = NULL; 1117 int skip = 0; 1118 u64 head; 1119 int err; 1120 void *p; 1121 1122 perf_tool__fill_defaults(tool); 1123 1124 head = 0; 1125 cur_size = sizeof(union perf_event); 1126 1127 buf = malloc(cur_size); 1128 if (!buf) 1129 return -errno; 1130 more: 1131 event = buf; 1132 err = readn(self->fd, event, sizeof(struct perf_event_header)); 1133 if (err <= 0) { 1134 if (err == 0) 1135 goto done; 1136 1137 pr_err("failed to read event header\n"); 1138 goto out_err; 1139 } 1140 1141 if (self->header.needs_swap) 1142 perf_event_header__bswap(&event->header); 1143 1144 size = event->header.size; 1145 if (size == 0) 1146 size = 8; 1147 1148 if (size > cur_size) { 1149 void *new = realloc(buf, size); 1150 if (!new) { 1151 pr_err("failed to allocate memory to read event\n"); 1152 goto out_err; 1153 } 1154 buf = new; 1155 cur_size = size; 1156 event = buf; 1157 } 1158 p = event; 1159 p += sizeof(struct perf_event_header); 1160 1161 if (size - sizeof(struct perf_event_header)) { 1162 err = readn(self->fd, p, size - sizeof(struct perf_event_header)); 1163 if (err <= 0) { 1164 if (err == 0) { 1165 pr_err("unexpected end of event stream\n"); 1166 goto done; 1167 } 1168 1169 pr_err("failed to read event data\n"); 1170 goto out_err; 1171 } 1172 } 1173 1174 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) { 1175 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1176 head, event->header.size, event->header.type); 1177 err = -EINVAL; 1178 goto out_err; 1179 } 1180 1181 head += size; 1182 1183 if (skip > 0) 1184 head += skip; 1185 1186 if (!session_done()) 1187 goto more; 1188 done: 1189 err = 0; 1190 out_err: 1191 free(buf); 1192 perf_session__warn_about_errors(self, tool); 1193 perf_session_free_sample_buffers(self); 1194 return err; 1195 } 1196 1197 static union perf_event * 1198 fetch_mmaped_event(struct perf_session *session, 1199 u64 head, size_t mmap_size, char *buf) 1200 { 1201 union perf_event *event; 1202 1203 /* 1204 * Ensure we have enough space remaining to read 1205 * the size of the event in the headers. 1206 */ 1207 if (head + sizeof(event->header) > mmap_size) 1208 return NULL; 1209 1210 event = (union perf_event *)(buf + head); 1211 1212 if (session->header.needs_swap) 1213 perf_event_header__bswap(&event->header); 1214 1215 if (head + event->header.size > mmap_size) 1216 return NULL; 1217 1218 return event; 1219 } 1220 1221 int __perf_session__process_events(struct perf_session *session, 1222 u64 data_offset, u64 data_size, 1223 u64 file_size, struct perf_tool *tool) 1224 { 1225 u64 head, page_offset, file_offset, file_pos, progress_next; 1226 int err, mmap_prot, mmap_flags, map_idx = 0; 1227 size_t page_size, mmap_size; 1228 char *buf, *mmaps[8]; 1229 union perf_event *event; 1230 uint32_t size; 1231 1232 perf_tool__fill_defaults(tool); 1233 1234 page_size = sysconf(_SC_PAGESIZE); 1235 1236 page_offset = page_size * (data_offset / page_size); 1237 file_offset = page_offset; 1238 head = data_offset - page_offset; 1239 1240 if (data_offset + data_size < file_size) 1241 file_size = data_offset + data_size; 1242 1243 progress_next = file_size / 16; 1244 1245 mmap_size = session->mmap_window; 1246 if (mmap_size > file_size) 1247 mmap_size = file_size; 1248 1249 memset(mmaps, 0, sizeof(mmaps)); 1250 1251 mmap_prot = PROT_READ; 1252 mmap_flags = MAP_SHARED; 1253 1254 if (session->header.needs_swap) { 1255 mmap_prot |= PROT_WRITE; 1256 mmap_flags = MAP_PRIVATE; 1257 } 1258 remap: 1259 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd, 1260 file_offset); 1261 if (buf == MAP_FAILED) { 1262 pr_err("failed to mmap file\n"); 1263 err = -errno; 1264 goto out_err; 1265 } 1266 mmaps[map_idx] = buf; 1267 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1268 file_pos = file_offset + head; 1269 1270 more: 1271 event = fetch_mmaped_event(session, head, mmap_size, buf); 1272 if (!event) { 1273 if (mmaps[map_idx]) { 1274 munmap(mmaps[map_idx], mmap_size); 1275 mmaps[map_idx] = NULL; 1276 } 1277 1278 page_offset = page_size * (head / page_size); 1279 file_offset += page_offset; 1280 head -= page_offset; 1281 goto remap; 1282 } 1283 1284 size = event->header.size; 1285 1286 if (size == 0 || 1287 perf_session__process_event(session, event, tool, file_pos) < 0) { 1288 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1289 file_offset + head, event->header.size, 1290 event->header.type); 1291 err = -EINVAL; 1292 goto out_err; 1293 } 1294 1295 head += size; 1296 file_pos += size; 1297 1298 if (file_pos >= progress_next) { 1299 progress_next += file_size / 16; 1300 ui_progress__update(file_pos, file_size, 1301 "Processing events..."); 1302 } 1303 1304 if (file_pos < file_size) 1305 goto more; 1306 1307 err = 0; 1308 /* do the final flush for ordered samples */ 1309 session->ordered_samples.next_flush = ULLONG_MAX; 1310 flush_sample_queue(session, tool); 1311 out_err: 1312 perf_session__warn_about_errors(session, tool); 1313 perf_session_free_sample_buffers(session); 1314 return err; 1315 } 1316 1317 int perf_session__process_events(struct perf_session *self, 1318 struct perf_tool *tool) 1319 { 1320 int err; 1321 1322 if (perf_session__register_idle_thread(self) == NULL) 1323 return -ENOMEM; 1324 1325 if (!self->fd_pipe) 1326 err = __perf_session__process_events(self, 1327 self->header.data_offset, 1328 self->header.data_size, 1329 self->size, tool); 1330 else 1331 err = __perf_session__process_pipe_events(self, tool); 1332 1333 return err; 1334 } 1335 1336 bool perf_session__has_traces(struct perf_session *self, const char *msg) 1337 { 1338 if (!(self->sample_type & PERF_SAMPLE_RAW)) { 1339 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1340 return false; 1341 } 1342 1343 return true; 1344 } 1345 1346 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1347 const char *symbol_name, u64 addr) 1348 { 1349 char *bracket; 1350 enum map_type i; 1351 struct ref_reloc_sym *ref; 1352 1353 ref = zalloc(sizeof(struct ref_reloc_sym)); 1354 if (ref == NULL) 1355 return -ENOMEM; 1356 1357 ref->name = strdup(symbol_name); 1358 if (ref->name == NULL) { 1359 free(ref); 1360 return -ENOMEM; 1361 } 1362 1363 bracket = strchr(ref->name, ']'); 1364 if (bracket) 1365 *bracket = '\0'; 1366 1367 ref->addr = addr; 1368 1369 for (i = 0; i < MAP__NR_TYPES; ++i) { 1370 struct kmap *kmap = map__kmap(maps[i]); 1371 kmap->ref_reloc_sym = ref; 1372 } 1373 1374 return 0; 1375 } 1376 1377 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp) 1378 { 1379 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) + 1380 __dsos__fprintf(&self->host_machine.user_dsos, fp) + 1381 machines__fprintf_dsos(&self->machines, fp); 1382 } 1383 1384 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp, 1385 bool with_hits) 1386 { 1387 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits); 1388 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits); 1389 } 1390 1391 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1392 { 1393 struct perf_evsel *pos; 1394 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1395 1396 ret += hists__fprintf_nr_events(&session->hists, fp); 1397 1398 list_for_each_entry(pos, &session->evlist->entries, node) { 1399 ret += fprintf(fp, "%s stats:\n", event_name(pos)); 1400 ret += hists__fprintf_nr_events(&pos->hists, fp); 1401 } 1402 1403 return ret; 1404 } 1405 1406 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1407 { 1408 /* 1409 * FIXME: Here we have to actually print all the machines in this 1410 * session, not just the host... 1411 */ 1412 return machine__fprintf(&session->host_machine, fp); 1413 } 1414 1415 void perf_session__remove_thread(struct perf_session *session, 1416 struct thread *th) 1417 { 1418 /* 1419 * FIXME: This one makes no sense, we need to remove the thread from 1420 * the machine it belongs to, perf_session can have many machines, so 1421 * doing it always on ->host_machine is wrong. Fix when auditing all 1422 * the 'perf kvm' code. 1423 */ 1424 machine__remove_thread(&session->host_machine, th); 1425 } 1426 1427 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1428 unsigned int type) 1429 { 1430 struct perf_evsel *pos; 1431 1432 list_for_each_entry(pos, &session->evlist->entries, node) { 1433 if (pos->attr.type == type) 1434 return pos; 1435 } 1436 return NULL; 1437 } 1438 1439 void perf_event__print_ip(union perf_event *event, struct perf_sample *sample, 1440 struct machine *machine, struct perf_evsel *evsel, 1441 int print_sym, int print_dso, int print_symoffset) 1442 { 1443 struct addr_location al; 1444 struct callchain_cursor_node *node; 1445 1446 if (perf_event__preprocess_sample(event, machine, &al, sample, 1447 NULL) < 0) { 1448 error("problem processing %d event, skipping it.\n", 1449 event->header.type); 1450 return; 1451 } 1452 1453 if (symbol_conf.use_callchain && sample->callchain) { 1454 1455 if (machine__resolve_callchain(machine, evsel, al.thread, 1456 sample->callchain, NULL) != 0) { 1457 if (verbose) 1458 error("Failed to resolve callchain. Skipping\n"); 1459 return; 1460 } 1461 callchain_cursor_commit(&callchain_cursor); 1462 1463 while (1) { 1464 node = callchain_cursor_current(&callchain_cursor); 1465 if (!node) 1466 break; 1467 1468 printf("\t%16" PRIx64, node->ip); 1469 if (print_sym) { 1470 printf(" "); 1471 symbol__fprintf_symname(node->sym, stdout); 1472 } 1473 if (print_dso) { 1474 printf(" ("); 1475 map__fprintf_dsoname(node->map, stdout); 1476 printf(")"); 1477 } 1478 printf("\n"); 1479 1480 callchain_cursor_advance(&callchain_cursor); 1481 } 1482 1483 } else { 1484 printf("%16" PRIx64, sample->ip); 1485 if (print_sym) { 1486 printf(" "); 1487 if (print_symoffset) 1488 symbol__fprintf_symname_offs(al.sym, &al, 1489 stdout); 1490 else 1491 symbol__fprintf_symname(al.sym, stdout); 1492 } 1493 1494 if (print_dso) { 1495 printf(" ("); 1496 map__fprintf_dsoname(al.map, stdout); 1497 printf(")"); 1498 } 1499 } 1500 } 1501 1502 int perf_session__cpu_bitmap(struct perf_session *session, 1503 const char *cpu_list, unsigned long *cpu_bitmap) 1504 { 1505 int i; 1506 struct cpu_map *map; 1507 1508 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1509 struct perf_evsel *evsel; 1510 1511 evsel = perf_session__find_first_evtype(session, i); 1512 if (!evsel) 1513 continue; 1514 1515 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1516 pr_err("File does not contain CPU events. " 1517 "Remove -c option to proceed.\n"); 1518 return -1; 1519 } 1520 } 1521 1522 map = cpu_map__new(cpu_list); 1523 if (map == NULL) { 1524 pr_err("Invalid cpu_list\n"); 1525 return -1; 1526 } 1527 1528 for (i = 0; i < map->nr; i++) { 1529 int cpu = map->map[i]; 1530 1531 if (cpu >= MAX_NR_CPUS) { 1532 pr_err("Requested CPU %d too large. " 1533 "Consider raising MAX_NR_CPUS\n", cpu); 1534 return -1; 1535 } 1536 1537 set_bit(cpu, cpu_bitmap); 1538 } 1539 1540 return 0; 1541 } 1542 1543 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1544 bool full) 1545 { 1546 struct stat st; 1547 int ret; 1548 1549 if (session == NULL || fp == NULL) 1550 return; 1551 1552 ret = fstat(session->fd, &st); 1553 if (ret == -1) 1554 return; 1555 1556 fprintf(fp, "# ========\n"); 1557 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1558 perf_header__fprintf_info(session, fp, full); 1559 fprintf(fp, "# ========\n#\n"); 1560 } 1561