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