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